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ipt-netflow-2.2/ 0000755 0000000 0000000 00000000000 13213006644 012322 5 ustar root root ipt-netflow-2.2/Makefile.in 0000644 0000000 0000000 00000006710 13213006644 014373 0 ustar root root # Edit Makefile.in and run ./configure
KVERSION = @KVERSION@
KDIR = @KDIR@
KINSTDIR = $(shell dirname @KDIR@)
KOPTS = @KOPTS@
IPTABLES_CFLAGS = @IPTABLES_CFLAGS@
IPTABLES_MODULES = @IPTABLES_MODULES@
DEPMOD = /sbin/depmod -a
CARGS = @CARGS@
SNMPTGSO = /usr/lib/snmp/dlmod/snmp_NETFLOW.so
SNMPCONF = /etc/snmp/snmpd.conf
SNMPLINE = dlmod netflow $(SNMPTGSO)
CC = gcc
# https://www.kernel.org/doc/Documentation/kbuild/modules.txt
# https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt
obj-m = ipt_NETFLOW.o
ccflags-y = @KOPTS@
all: ipt_NETFLOW.ko libipt_NETFLOW.so libip6t_NETFLOW.so @SNMPTARGET@
ipt_NETFLOW.ko: version.h ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
@echo Compiling for kernel $(KVERSION)
make -C $(KDIR) M=$(CURDIR) modules CONFIG_DEBUG_INFO=y
@touch $@
sparse: | version.h ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
@rm -f ipt_NETFLOW.ko ipt_NETFLOW.o
@echo Compiling for kernel $(KVERSION)
make -C $(KDIR) M=$(CURDIR) modules C=1
@touch ipt_NETFLOW.ko
coverity:
coverity-submit -v
minstall: | ipt_NETFLOW.ko
@echo " *"
make -C $(KDIR) M=$(CURDIR) modules_install INSTALL_MOD_PATH=$(DESTDIR)
$(DEPMOD)
mclean:
make -C $(KDIR) M=$(CURDIR) clean
lclean:
-rm -f *.so *_sh.o
clean: mclean lclean
-rm -f *.so *.o modules.order version.h
snmp_NETFLOW.so: snmp_NETFLOW.c
$(CC) -fPIC -shared -o $@ $< -lnetsnmp
sinstall: | snmp_NETFLOW.so IPT-NETFLOW-MIB.my
@echo " *"
install -D IPT-NETFLOW-MIB.my $(DESTDIR)/usr/share/snmp/mibs/IPT-NETFLOW-MIB.my
install -D snmp_NETFLOW.so $(DESTDIR)$(SNMPTGSO)
@if ! egrep -qs "^ *$(SNMPLINE)" $(SNMPCONF); then \
echo " *"; \
echo " * Add this line to $(SNMPCONF) to enable IPT-NETFLOW-MIB:"; \
echo " *"; \
echo " * $(SNMPLINE)"; \
echo " *"; \
fi
@if killall -0 snmpd >/dev/null 2>&1; then \
echo " * (snmpd needs restart for changes to take effect.)"; \
else \
echo " * (snmpd is not started.)"; \
fi
%_sh.o: libipt_NETFLOW.c
$(CC) $(CFLAGS) -O2 -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
%.so: %_sh.o
$(CC) -shared -o $@ $<
version.h: ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
@./version.sh --define > version.h
linstall: | libipt_NETFLOW.so libip6t_NETFLOW.so
@echo " *"
install -D libipt_NETFLOW.so $(DESTDIR)$(IPTABLES_MODULES)/libipt_NETFLOW.so
install -D libip6t_NETFLOW.so $(DESTDIR)$(IPTABLES_MODULES)/libip6t_NETFLOW.so
dinstall:
@echo " *"
@./install-dkms.sh --install
install: minstall linstall @DKMSINSTALL@ @SNMPINSTALL@
uninstall:
-rm -f $(DESTDIR)$(IPTABLES_MODULES)/libipt_NETFLOW.so
-rm -f $(DESTDIR)$(IPTABLES_MODULES)/libip6t_NETFLOW.so
-rm -f $(DESTDIR)/usr/share/snmp/mibs/IPT-NETFLOW-MIB.my
-rm -f $(DESTDIR)$(SNMPTGSO)
@if egrep -qs "^ *$(SNMPLINE)" $(SNMPCONF); then \
echo " *"; \
echo " * Remove this line from $(SNMPCONF):"; \
echo " *"; \
echo " * "`egrep "^ *$(SNMPLINE)" $(SNMPCONF)`; \
echo " *"; \
fi
@if [ "@DKMSINSTALL@" = dinstall ]; then ./install-dkms.sh --uninstall; fi
-rm -f $(DESTDIR)$(KINSTDIR)/extra/ipt_NETFLOW.ko
Makefile: Makefile.in configure
./configure --make ${CARGS}
load: all
-insmod ipt_NETFLOW.ko active_timeout=5 protocol=9
-iptables -I OUTPUT -j NETFLOW
-iptables -I INPUT -j NETFLOW
-ip6tables -I OUTPUT -j NETFLOW
-ip6tables -I INPUT -j NETFLOW
unload:
-iptables -D OUTPUT -j NETFLOW
-iptables -D INPUT -j NETFLOW
-ip6tables -D OUTPUT -j NETFLOW
-ip6tables -D INPUT -j NETFLOW
-rmmod ipt_NETFLOW.ko
reload: unload load
ChangeLog:
gitlog-to-changelog > ChangeLog
.PHONY: ChangeLog
ipt-netflow-2.2/raw_promisc_debian_squeeze6.patch 0000644 0000000 0000000 00000002255 13213006644 021025 0 ustar root root
Short manual and patch for Debian Squeeze
suggested by Pavel Odintsov:
On Thu, Dec 27, 2012 at 07:46:30PM +0400, Pavel Odintsov wrote:
>
> ËÒÁÔËÉÊ ÍÁÎÕÁÌ ÄÌÑ ÐÁÔÞÉÎÇÁ Debian Squeeze ÑÄÒÁ ÐÁÔÞÅÍ promisc.
>
> cd /usr/src
> apt-get install -y dpkg-dev
> apt-get build-dep linux-image-2.6.32-5-amd64
> cd linux-2.6-2.6.32/
> apt-get source linux-image-2.6.32-5-amd64
>
> wget .... /root/raw_promisc_debian_squeeze6.patch
> patch -p1 < raw_promisc_debian_squeeze6.patch
> îÁËÌÁÄÙ×ÁÅÍ ÐÁÔÞÉ ÄÅÂÉÑÎÁ:
> debian/rules source
>
> úÁÐÕÓËÁÅÍ ÓÂÏÒËÕ:
> debian/rules binary
>
diff -rupN linux-2.6-2.6.32/net/ipv4/ip_input.c linux-2.6-2.6.32_promisc_raw//net/ipv4/ip_input.c
--- linux-2.6-2.6.32/net/ipv4/ip_input.c 2009-12-03 04:51:21.000000000 +0100
+++ linux-2.6-2.6.32_promisc_raw//net/ipv4/ip_input.c 2012-06-25 19:13:49.000000000 +0200
@@ -383,8 +383,8 @@ int ip_rcv(struct sk_buff *skb, struct n
/* When the interface is in promisc. mode, drop all the crap
* that it receives, do not try to analyse it.
*/
- if (skb->pkt_type == PACKET_OTHERHOST)
- goto drop;
+ //if (skb->pkt_type == PACKET_OTHERHOST)
+ // goto drop;
IP_UPD_PO_STATS_BH(dev_net(dev), IPSTATS_MIB_IN, skb->len);
ipt-netflow-2.2/compat.h 0000644 0000000 0000000 00000035574 13213006644 013774 0 ustar root root /* This code is derived from the Linux Kernel sources intended
* to maintain compatibility with different Kernel versions.
* Copyright of original source is of respective Linux Kernel authors.
* License is GPLv2.
*/
#ifndef COMPAT_NETFLOW_H
#define COMPAT_NETFLOW_H
#ifndef NIPQUAD
# define NIPQUAD(addr) \
((unsigned char *)&addr)[0], \
((unsigned char *)&addr)[1], \
((unsigned char *)&addr)[2], \
((unsigned char *)&addr)[3]
#endif
#ifndef HIPQUAD
# if defined(__LITTLE_ENDIAN)
# define HIPQUAD(addr) \
((unsigned char *)&addr)[3], \
((unsigned char *)&addr)[2], \
((unsigned char *)&addr)[1], \
((unsigned char *)&addr)[0]
# elif defined(__BIG_ENDIAN)
# define HIPQUAD NIPQUAD
# else
# error "Please fix asm/byteorder.h"
# endif /* __LITTLE_ENDIAN */
#endif
#ifndef IPT_CONTINUE
# define IPT_CONTINUE XT_CONTINUE
# define ipt_target xt_target
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
union nf_inet_addr {
__be32 ip;
__be32 ip6[4];
struct in_addr in;
struct in6_addr in6;
};
#endif
#ifndef list_first_entry
#define list_first_entry(ptr, type, member) \
list_entry((ptr)->next, type, member)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
# define INIT_NET(x) x
#else
# define INIT_NET(x) init_net.x
#endif
#ifndef ETH_P_8021AD
# define ETH_P_8021AD 0x88A8 /* 802.1ad Service VLAN */
#endif
#ifndef ETH_P_QINQ1
# define ETH_P_QINQ1 0x9100 /* deprecated QinQ VLAN */
# define ETH_P_QINQ2 0x9200 /* deprecated QinQ VLAN */
# define ETH_P_QINQ3 0x9300 /* deprecated QinQ VLAN */
#endif
#ifndef IPPROTO_MH
# define IPPROTO_MH 135
#endif
#ifdef CONFIG_SYSCTL
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
# define BEFORE2632(x,y) x,y
# else /* since 2.6.32 */
# define BEFORE2632(x,y)
# endif
# if LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0)
# define ctl_table struct ctl_table
# endif
# ifndef HAVE_GRSECURITY_H
# define ctl_table_no_const ctl_table
# endif
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
# define compat_hlist_for_each_entry hlist_for_each_entry
# define compat_hlist_for_each_entry_safe hlist_for_each_entry_safe
#else /* since 3.9.0 */
# define compat_hlist_for_each_entry(a,pos,c,d) hlist_for_each_entry(a,c,d)
# define compat_hlist_for_each_entry_safe(a,pos,c,d,e) hlist_for_each_entry_safe(a,c,d,e)
#endif
#ifndef WARN_ONCE
#define WARN_ONCE(x,fmt...) ({ if (x) printk(KERN_WARNING fmt); })
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
# define IPPROTO_UDPLITE 136
#endif
#ifndef time_is_before_jiffies
# define time_is_before_jiffies(a) time_after(jiffies, a)
#endif
#ifndef time_is_after_jiffies
# define time_is_after_jiffies(a) time_before(jiffies, a)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,14,0)
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
# define prandom_u32 get_random_int
# elif LINUX_VERSION_CODE < KERNEL_VERSION(3,8,0)
# define prandom_u32 random32
#endif
#define prandom_u32_max compat_prandom_u32_max
static inline u32 prandom_u32_max(u32 ep_ro)
{
return (u32)(((u64) prandom_u32() * ep_ro) >> 32);
}
#endif
#ifndef min_not_zero
# define min_not_zero(x, y) ({ \
typeof(x) __x = (x); \
typeof(y) __y = (y); \
__x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); })
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
static int __ethtool_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
ASSERT_RTNL();
if (!dev->ethtool_ops->get_settings)
return -EOPNOTSUPP;
memset(cmd, 0, sizeof(struct ethtool_cmd));
cmd->cmd = ETHTOOL_GSET;
return dev->ethtool_ops->get_settings(dev, cmd);
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27)
# define ethtool_cmd_speed(x) (x)->speed
#endif
#ifndef ARPHRD_PHONET
# define ARPHRD_PHONET 820
# define ARPHRD_PHONET_PIPE 821
#endif
#ifndef ARPHRD_IEEE802154
# define ARPHRD_IEEE802154 804
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
# define for_each_netdev_ns(net, dev) for (dev = dev_base; dev; dev = dev->next)
#elif LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
# define for_each_netdev_ns(net, d) for_each_netdev(d)
#else
# define for_each_netdev_ns(net, d) for_each_netdev(net, d)
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
# define CHECK_FAIL 0
# define CHECK_OK 1
#else
# define CHECK_FAIL -EINVAL
# define CHECK_OK 0
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)
# define use_module ref_module
#endif
#ifndef NF_IP_LOCAL_IN /* 2.6.25 */
# define NF_IP_PRE_ROUTING NF_INET_PRE_ROUTING
# define NF_IP_LOCAL_IN NF_INET_LOCAL_IN
# define NF_IP_FORWARD NF_INET_FORWARD
# define NF_IP_LOCAL_OUT NF_INET_LOCAL_OUT
# define NF_IP_POST_ROUTING NF_INET_POST_ROUTING
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
/* net/netfilter/x_tables.c */
static void xt_unregister_targets(struct xt_target *target, unsigned int n)
{
unsigned int i;
for (i = 0; i < n; i++)
xt_unregister_target(&target[i]);
}
static int xt_register_targets(struct xt_target *target, unsigned int n)
{
unsigned int i;
int err = 0;
for (i = 0; i < n; i++)
if ((err = xt_register_target(&target[i])))
goto err;
return err;
err:
if (i > 0)
xt_unregister_targets(target, i);
return err;
}
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,11,0)
#define num_physpages totalram_pages
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
# ifdef ktime_to_timeval
/* ktime_to_timeval is defined on 64bit and inline on 32bit cpu */
/* when it's defined it calls ns_to_timeval, which is not exported */
struct timeval portable_ns_to_timeval(const s64 nsec)
{
struct timespec ts = ns_to_timespec(nsec);
struct timeval tv;
tv.tv_sec = ts.tv_sec;
tv.tv_usec = (suseconds_t) ts.tv_nsec / 1000;
return tv;
}
# define ns_to_timeval portable_ns_to_timeval
# endif
static inline s64 portable_ktime_to_ms(const ktime_t kt)
{
struct timeval tv = ktime_to_timeval(kt);
return (s64) tv.tv_sec * MSEC_PER_SEC + tv.tv_usec / USEC_PER_MSEC;
}
# define ktime_to_ms portable_ktime_to_ms
#endif /* before 2.6.35 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
static inline s64 portable_ktime_to_us(const ktime_t kt)
{
struct timeval tv = ktime_to_timeval(kt);
return (s64) tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
}
#define ktime_to_us portable_ktime_to_us
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
static inline void put_unaligned_be16(u16 val, void *p)
{
put_unaligned(cpu_to_be16(val), (__be16 *)p);
}
static inline void put_unaligned_be32(u32 val, void *p)
{
put_unaligned(cpu_to_be32(val), (__be32 *)p);
}
static inline void put_unaligned_be64(u64 val, void *p)
{
put_unaligned(cpu_to_be64(val), (__be64 *)p);
}
#endif
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,24) && !defined(RHEL_MAJOR)
static void *__seq_open_private(struct file *f, struct seq_operations *ops,
int psize)
{
int rc;
void *private;
struct seq_file *seq;
private = kzalloc(psize, GFP_KERNEL);
if (private == NULL)
goto out;
rc = seq_open(f, ops);
if (rc < 0)
goto out_free;
seq = f->private_data;
seq->private = private;
return private;
out_free:
kfree(private);
out:
return NULL;
}
#endif
/* disappeared in v3.19 */
#ifndef __get_cpu_var
#define __get_cpu_var(var) (*this_cpu_ptr(&(var)))
#endif
#ifndef MPLS_HLEN
#define MPLS_HLEN 4
static inline int eth_p_mpls(__be16 eth_type)
{
return eth_type == htons(ETH_P_MPLS_UC) ||
eth_type == htons(ETH_P_MPLS_MC);
}
#endif
#ifndef MPLS_LS_S_MASK
struct mpls_label {
__be32 entry;
};
#define MPLS_LS_S_MASK 0x00000100
#endif
/* sockaddr comparison functions is from fs/nfs/client.c */
static int sockaddr_match_ipaddr6(const struct sockaddr *sa1, const struct sockaddr *sa2)
{
const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
return 0;
#if 0
else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
return sin1->sin6_scope_id == sin2->sin6_scope_id;
#endif
return 1;
}
static int sockaddr_match_ipaddr4(const struct sockaddr *sa1, const struct sockaddr *sa2)
{
const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
}
static int sockaddr_cmp_ip6(const struct sockaddr *sa1, const struct sockaddr *sa2)
{
const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sa1;
const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sa2;
return sockaddr_match_ipaddr6(sa1, sa2) &&
(sin1->sin6_port == sin2->sin6_port);
}
static int sockaddr_cmp_ip4(const struct sockaddr *sa1, const struct sockaddr *sa2)
{
const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
return sockaddr_match_ipaddr4(sa1, sa2) &&
(sin1->sin_port == sin2->sin_port);
}
static int sockaddr_cmp(const struct sockaddr_storage *sa1, const struct sockaddr_storage *sa2)
{
const struct sockaddr *s1 = (const struct sockaddr *)sa1;
const struct sockaddr *s2 = (const struct sockaddr *)sa2;
if (sa1->ss_family != sa2->ss_family)
return 0;
switch (sa1->ss_family) {
case AF_INET:
return sockaddr_cmp_ip4(s1, s2);
case AF_INET6:
return sockaddr_cmp_ip6(s1, s2);
}
return 0;
}
#ifndef IN6PTON_XDIGIT
#define hex_to_bin compat_hex_to_bin
/* lib/hexdump.c */
int hex_to_bin(char ch)
{
if ((ch >= '0') && (ch <= '9'))
return ch - '0';
ch = tolower(ch);
if ((ch >= 'a') && (ch <= 'f'))
return ch - 'a' + 10;
return -1;
}
/* net/core/utils.c */
#define IN6PTON_XDIGIT 0x00010000
#define IN6PTON_DIGIT 0x00020000
#define IN6PTON_COLON_MASK 0x00700000
#define IN6PTON_COLON_1 0x00100000 /* single : requested */
#define IN6PTON_COLON_2 0x00200000 /* second : requested */
#define IN6PTON_COLON_1_2 0x00400000 /* :: requested */
#define IN6PTON_DOT 0x00800000 /* . */
#define IN6PTON_DELIM 0x10000000
#define IN6PTON_NULL 0x20000000 /* first/tail */
#define IN6PTON_UNKNOWN 0x40000000
static inline int xdigit2bin(char c, int delim)
{
int val;
if (c == delim || c == '\0')
return IN6PTON_DELIM;
if (c == ':')
return IN6PTON_COLON_MASK;
if (c == '.')
return IN6PTON_DOT;
val = hex_to_bin(c);
if (val >= 0)
return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0);
if (delim == -1)
return IN6PTON_DELIM;
return IN6PTON_UNKNOWN;
}
int in4_pton(const char *src, int srclen,
u8 *dst,
int delim, const char **end)
{
const char *s;
u8 *d;
u8 dbuf[4];
int ret = 0;
int i;
int w = 0;
if (srclen < 0)
srclen = strlen(src);
s = src;
d = dbuf;
i = 0;
while(1) {
int c;
c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK))) {
goto out;
}
if (c & (IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
if (w == 0)
goto out;
*d++ = w & 0xff;
w = 0;
i++;
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
if (i != 4)
goto out;
break;
}
goto cont;
}
w = (w * 10) + c;
if ((w & 0xffff) > 255) {
goto out;
}
cont:
if (i >= 4)
goto out;
s++;
srclen--;
}
ret = 1;
memcpy(dst, dbuf, sizeof(dbuf));
out:
if (end)
*end = s;
return ret;
}
int in6_pton(const char *src, int srclen,
u8 *dst,
int delim, const char **end)
{
const char *s, *tok = NULL;
u8 *d, *dc = NULL;
u8 dbuf[16];
int ret = 0;
int i;
int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL;
int w = 0;
memset(dbuf, 0, sizeof(dbuf));
s = src;
d = dbuf;
if (srclen < 0)
srclen = strlen(src);
while (1) {
int c;
c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
if (!(c & state))
goto out;
if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
/* process one 16-bit word */
if (!(state & IN6PTON_NULL)) {
*d++ = (w >> 8) & 0xff;
*d++ = w & 0xff;
}
w = 0;
if (c & IN6PTON_DELIM) {
/* We've processed last word */
break;
}
/*
* COLON_1 => XDIGIT
* COLON_2 => XDIGIT|DELIM
* COLON_1_2 => COLON_2
*/
switch (state & IN6PTON_COLON_MASK) {
case IN6PTON_COLON_2:
dc = d;
state = IN6PTON_XDIGIT | IN6PTON_DELIM;
if (dc - dbuf >= sizeof(dbuf))
state |= IN6PTON_NULL;
break;
case IN6PTON_COLON_1|IN6PTON_COLON_1_2:
state = IN6PTON_XDIGIT | IN6PTON_COLON_2;
break;
case IN6PTON_COLON_1:
state = IN6PTON_XDIGIT;
break;
case IN6PTON_COLON_1_2:
state = IN6PTON_COLON_2;
break;
default:
state = 0;
}
tok = s + 1;
goto cont;
}
if (c & IN6PTON_DOT) {
ret = in4_pton(tok ? tok : s, srclen + (int)(s - tok), d, delim, &s);
if (ret > 0) {
d += 4;
break;
}
goto out;
}
w = (w << 4) | (0xff & c);
state = IN6PTON_COLON_1 | IN6PTON_DELIM;
if (!(w & 0xf000)) {
state |= IN6PTON_XDIGIT;
}
if (!dc && d + 2 < dbuf + sizeof(dbuf)) {
state |= IN6PTON_COLON_1_2;
state &= ~IN6PTON_DELIM;
}
if (d + 2 >= dbuf + sizeof(dbuf)) {
state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2);
}
cont:
if ((dc && d + 4 < dbuf + sizeof(dbuf)) ||
d + 4 == dbuf + sizeof(dbuf)) {
state |= IN6PTON_DOT;
}
if (d >= dbuf + sizeof(dbuf)) {
state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK);
}
s++;
srclen--;
}
i = 15; d--;
if (dc) {
while(d >= dc)
dst[i--] = *d--;
while(i >= dc - dbuf)
dst[i--] = 0;
while(i >= 0)
dst[i--] = *d--;
} else
memcpy(dst, dbuf, sizeof(dbuf));
ret = 1;
out:
if (end)
*end = s;
return ret;
}
#endif /* IN6PTON_XDIGIT */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
# define sock_create_kern(f, t, p, s) sock_create_kern(&init_net, f, t, p, s)
#endif
#if !defined(vlan_tx_tag_get) && defined(skb_vlan_tag_get)
# define vlan_tx_tag_get skb_vlan_tag_get
# define vlan_tx_tag_present skb_vlan_tag_present
#endif
#ifndef SPEED_UNKNOWN
# define SPEED_UNKNOWN -1
#endif
#if !defined __GNUC_PREREQ && defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __GNUC_PREREQ(maj, min) 0
#endif
/* ktime is not union anymore, since 2456e855354415bfaeb7badaa14e11b3e02c8466 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,10,0)
# define first_tv64 first.tv64
# define last_tv64 last.tv64
#else
# define first_tv64 first
# define last_tv64 last
#endif
/* Offset changes made in 613dbd95723aee7abd16860745691b6c7bda20dc */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) && LINUX_VERSION_CODE < KERNEL_VERSION(4,10,0)
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
# define xt_action_param xt_target_param
# endif
static inline u_int8_t xt_family(const struct xt_action_param *par)
{
return par->family;
}
static inline const struct net_device *xt_in(const struct xt_action_param *par)
{
return par->in;
}
static inline const struct net_device *xt_out(const struct xt_action_param *par)
{
return par->out;
}
static inline unsigned int xt_hooknum(const struct xt_action_param *par)
{
return par->hooknum;
}
#endif
#ifndef SK_CAN_REUSE
# define SK_CAN_REUSE 1
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,13,0)
# define compat_refcount_read atomic_read
#else
# define compat_refcount_read refcount_read
#endif
#endif /* COMPAT_NETFLOW_H */
ipt-netflow-2.2/IPT-NETFLOW-MIB.my 0000644 0000000 0000000 00000043277 13213006644 015063 0 ustar root root -- IPT-NETFLOW-MIB.my
IPT-NETFLOW-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Counter64,
Gauge32, Integer32, Counter32, enterprises
FROM SNMPv2-SMI
OBJECT-GROUP, MODULE-COMPLIANCE
FROM SNMPv2-CONF
CounterBasedGauge64
FROM HCNUM-TC
TEXTUAL-CONVENTION, DisplayString, DateAndTime
FROM SNMPv2-TC;
iptNetflowMIB MODULE-IDENTITY
LAST-UPDATED "201409120000Z"
ORGANIZATION "ABC"
CONTACT-INFO
"Author's email: abc at telekom.ru
Latest version should be obtained from
https://raw.githubusercontent.com/aabc/ipt-netflow/master/IPT-NETFLOW-MIB.my"
DESCRIPTION
"The IPT-NETFLOW-MIB defines managed objects
for ipt_NETFLOW kernel module, which is high
performance NetFlow/IPFIX probe for Linux.
Copyright (c) 2014 <abc at telekom.ru>.
License: GPL"
REVISION "201409110000Z"
DESCRIPTION "Initial revision."
::= { enterprises 37476 9000 10 1 }
-- Top Level --
iptNetflowObjects OBJECT IDENTIFIER ::= { iptNetflowMIB 1 }
iptNetflowStatistics OBJECT IDENTIFIER ::= { iptNetflowMIB 2 }
iptNetflowConformance OBJECT IDENTIFIER ::= { iptNetflowMIB 3 }
-- Objects --
-- modinfo
iptNetflowModule OBJECT IDENTIFIER ::= { iptNetflowObjects 1 }
-- sysctl net.netflow
iptNetflowSysctl OBJECT IDENTIFIER ::= { iptNetflowObjects 2 }
-- Modinfo Objects --
name OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Module name."
::= { iptNetflowModule 1 }
version OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Software version of the module."
::= { iptNetflowModule 2 }
srcversion OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Binary version of the module."
::= { iptNetflowModule 3 }
loadTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Module load date-time."
::= { iptNetflowModule 4 }
refcnt OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Module usage by other kernel objects."
::= { iptNetflowModule 5 }
-- RW Sysctl objects --
protocol OBJECT-TYPE
SYNTAX INTEGER {
netflow5(5),
netflow9(9),
ipfix(10)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Protocol version (5, 9, 10=IPFIX)."
::= { iptNetflowSysctl 1 }
hashsize OBJECT-TYPE
SYNTAX Integer32
UNITS "buckets"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Hash table size of flows cache."
::= { iptNetflowSysctl 2 }
maxflows OBJECT-TYPE
SYNTAX Integer32
UNITS "flows"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Max flows limit. This limit is used for DoS protection."
::= { iptNetflowSysctl 3 }
active-timeout OBJECT-TYPE
SYNTAX Integer32
UNITS "minutes"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Active flows timeout value."
::= { iptNetflowSysctl 4 }
inactive-timeout OBJECT-TYPE
SYNTAX Integer32
UNITS "minutes"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Inactive flows timeout value."
::= { iptNetflowSysctl 5 }
sndbuf OBJECT-TYPE
SYNTAX Integer32
UNITS "bytes"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Sockets SNDBUF size."
::= { iptNetflowSysctl 6 }
destination OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Export destination parameter."
::= { iptNetflowSysctl 7 }
aggregation OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Aggregation parameters."
::= { iptNetflowSysctl 8 }
sampler OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Sampler parameters: sampling mode:sampling interval.
Where samplign modes: deterministic, random, hash."
::= { iptNetflowSysctl 9 }
natevents OBJECT-TYPE
SYNTAX INTEGER {
disabled(0),
enabled(1)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Natevents (NEL) controlling parameter."
::= { iptNetflowSysctl 10 }
promisc OBJECT-TYPE
SYNTAX INTEGER {
disabled(0),
enabled(1)
}
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"Promisc hack controlling parameter."
::= { iptNetflowSysctl 11 }
snmp-rules OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"SNMP-index translation rules."
::= { iptNetflowSysctl 12 }
scan-min OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"scan-min parameter."
::= { iptNetflowSysctl 13 }
-- Statistics Objects --
iptNetflowTotals OBJECT IDENTIFIER ::= { iptNetflowStatistics 1 }
inBitRate OBJECT-TYPE
SYNTAX CounterBasedGauge64
UNITS "bits/second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total incoming bits per second."
::= { iptNetflowTotals 1 }
inPacketRate OBJECT-TYPE
SYNTAX Gauge32
UNITS "packets/second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total incoming packets per second."
::= { iptNetflowTotals 2 }
inFlows OBJECT-TYPE
SYNTAX Counter64
UNITS "flows"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total observed (metered) flows."
::= { iptNetflowTotals 3 }
inPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total metered packets. Not couning dropped packets."
::= { iptNetflowTotals 4 }
inBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total metered bytes in inPackets."
::= { iptNetflowTotals 5 }
FixedDiv100 ::= TEXTUAL-CONVENTION
DISPLAY-HINT "d-2"
STATUS current
DESCRIPTION "Fixed point, two decimals."
SYNTAX Gauge32
hashMetric OBJECT-TYPE
SYNTAX FixedDiv100
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Measure of performance of hash table. When optimal should
attract to 1.0, when non-optimal will be highly above of 1."
::= { iptNetflowTotals 6 }
hashMemory OBJECT-TYPE
SYNTAX Gauge32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"How much system memory is used by the hash table."
::= { iptNetflowTotals 7 }
hashFlows OBJECT-TYPE
SYNTAX Gauge32
UNITS "flows"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Flows currently residing in the hash table and not
exported yet."
::= { iptNetflowTotals 8 }
hashPackets OBJECT-TYPE
SYNTAX Gauge32
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packets in flows currently residing in the hash table."
::= { iptNetflowTotals 9 }
hashBytes OBJECT-TYPE
SYNTAX CounterBasedGauge64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Bytes in flows currently residing in the hash table."
::= { iptNetflowTotals 10 }
dropPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total packets dropped by metering process."
::= { iptNetflowTotals 11 }
dropBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total bytes in packets dropped by metering process."
::= { iptNetflowTotals 12 }
outByteRate OBJECT-TYPE
SYNTAX Gauge32
UNITS "bytes/second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total exporter output bytes per second."
::= { iptNetflowTotals 13 }
outFlows OBJECT-TYPE
SYNTAX Counter64
UNITS "flows"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total exported flow data records."
::= { iptNetflowTotals 14 }
outPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total exported packets of netflow stream itself."
::= { iptNetflowTotals 15 }
outBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total exported bytes of netflow stream itself."
::= { iptNetflowTotals 16 }
lostFlows OBJECT-TYPE
SYNTAX Counter64
UNITS "flows"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total of accounted flows that are lost by exporting process
due to socket errors. This value will not include asynchronous
errors (cberr), these will be counted in errTotal."
::= { iptNetflowTotals 17 }
lostPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total metered packets lost by exporting process.
See lostFlows for details."
::= { iptNetflowTotals 18 }
lostBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total bytes in packets lost by exporting process.
See lostFlows for details."
::= { iptNetflowTotals 19 }
errTotal OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Total exporting sockets errors (including cberr)."
::= { iptNetflowTotals 20 }
sndbufPeak OBJECT-TYPE
SYNTAX Counter32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Global maximum value of socket sndbuf. Sort of output
queue length."
::= { iptNetflowTotals 21 }
-- Per CPU statistics --
iptNetflowCpuTable OBJECT-TYPE
SYNTAX SEQUENCE OF IptNetflowCpuEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Per-CPU statistics."
::= { iptNetflowStatistics 2 }
iptNetflowCpuEntry OBJECT-TYPE
SYNTAX IptNetflowCpuEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the iptNetflowCpuTable."
INDEX { cpuIndex }
::= { iptNetflowCpuTable 1 }
IptNetflowCpuEntry ::=
SEQUENCE {
cpuIndex INTEGER,
cpuInPacketRate Gauge32,
cpuInFlows Counter64,
cpuInPackets Counter64,
cpuInBytes Counter64,
cpuHashMetric FixedDiv100,
cpuDropPackets Counter64,
cpuDropBytes Counter64,
cpuErrTrunc Counter32,
cpuErrFrag Counter32,
cpuErrAlloc Counter32,
cpuErrMaxflows Counter32
}
cpuIndex OBJECT-TYPE
SYNTAX Integer32 (0..4096)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Index of this cpu."
::= { iptNetflowCpuEntry 1 }
cpuInPacketRate OBJECT-TYPE
SYNTAX Gauge32
UNITS "packets/second"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Incoming packets per second for this cpu."
::= { iptNetflowCpuEntry 2 }
cpuInFlows OBJECT-TYPE
SYNTAX Counter64
UNITS "flows"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Flows metered on this cpu."
::= { iptNetflowCpuEntry 3 }
cpuInPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packets metered for cpuIndex."
::= { iptNetflowCpuEntry 4 }
cpuInBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Bytes metered on this cpu."
::= { iptNetflowCpuEntry 5 }
cpuHashMetric OBJECT-TYPE
SYNTAX FixedDiv100
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Measure of performance of hash table on this cpu."
::= { iptNetflowCpuEntry 6 }
cpuDropPackets OBJECT-TYPE
SYNTAX Counter64
UNITS "packets"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packets dropped by metering process on this cpu."
::= { iptNetflowCpuEntry 7 }
cpuDropBytes OBJECT-TYPE
SYNTAX Counter64
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Bytes in cpuDropPackets for this cpu."
::= { iptNetflowCpuEntry 8 }
cpuErrTrunc OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Truncated packets dropped for this cpu."
::= { iptNetflowCpuEntry 9 }
cpuErrFrag OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Fragmented packets dropped for this cpu."
::= { iptNetflowCpuEntry 10 }
cpuErrAlloc OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packets dropped due to memory allocation errors."
::= { iptNetflowCpuEntry 11 }
cpuErrMaxflows OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Packets dropped due to maxflows limit being reached."
::= { iptNetflowCpuEntry 12 }
-- Per Socket statistics --
iptNetflowSockTable OBJECT-TYPE
SYNTAX SEQUENCE OF IptNetflowSockEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Per socket statistics."
::= { iptNetflowStatistics 3 }
iptNetflowSockEntry OBJECT-TYPE
SYNTAX IptNetflowSockEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the iptNetflowSockTable."
INDEX { sockIndex }
::= { iptNetflowSockTable 1 }
IptNetflowSockEntry ::=
SEQUENCE {
sockIndex INTEGER,
sockDestination DisplayString,
sockActive INTEGER,
sockErrConnect Counter32,
sockErrFull Counter32,
sockErrCberr Counter32,
sockErrOther Counter32,
sockSndbuf Gauge32,
sockSndbufFill Gauge32,
sockSndbufPeak Gauge32
}
sockIndex OBJECT-TYPE
SYNTAX Integer32 (0..4096)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Exporting socket index."
::= { iptNetflowSockEntry 1 }
sockDestination OBJECT-TYPE
SYNTAX DisplayString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Exporting connection destination of this socket."
::= { iptNetflowSockEntry 2 }
sockActive OBJECT-TYPE
SYNTAX INTEGER {
inactive(0),
active(1)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Connection state of this socket."
::= { iptNetflowSockEntry 3 }
sockErrConnect OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Connections attempt count. High value usually mean
that network is not set up properly, or module is loaded
before network is up, in this case it is not dangerous
and should be ignored."
::= { iptNetflowSockEntry 4 }
sockErrFull OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Socket full errors on this socket. Usually mean sndbuf
value is too small."
::= { iptNetflowSockEntry 5 }
sockErrCberr OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Asynchronous callback errors on this socket. Usually mean
that there is 'connection refused' errors on UDP socket
reported via ICMP messages."
::= { iptNetflowSockEntry 6 }
sockErrOther OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"All other possible errors on this socket."
::= { iptNetflowSockEntry 7 }
sockSndbuf OBJECT-TYPE
SYNTAX Gauge32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Sndbuf value for this socket. Higher value allows accommodate
(exporting) traffic bursts."
::= { iptNetflowSockEntry 8 }
sockSndbufFill OBJECT-TYPE
SYNTAX Gauge32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Amount of data currently in socket buffers. When this value
will reach size sndbuf, packet loss will occur."
::= { iptNetflowSockEntry 9 }
sockSndbufPeak OBJECT-TYPE
SYNTAX Gauge32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Historical peak amount of data in socket buffers. Useful to
evaluate sndbuf size, because sockSndbufFill is transient."
::= { iptNetflowSockEntry 10 }
-- Conformance Information --
iptNetflowCompliances OBJECT IDENTIFIER ::= { iptNetflowConformance 1 }
iptNetflowGroups OBJECT IDENTIFIER ::= { iptNetflowConformance 2 }
iptNetflowCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION "iptNetflowCompliance"
MODULE
MANDATORY-GROUPS {
iptNetflowModuleGroup,
iptNetflowSysctlGroup,
iptNetflowTotalsGroup,
iptNetflowCpuGroup,
iptNetflowSockGroup
}
::= { iptNetflowCompliances 1 }
iptNetflowModuleGroup OBJECT-GROUP
OBJECTS {
name,
version,
srcversion,
loadTime,
refcnt
}
STATUS current
DESCRIPTION "Modinfo."
::= { iptNetflowGroups 1 }
iptNetflowSysctlGroup OBJECT-GROUP
OBJECTS {
hashsize,
maxflows,
protocol,
active-timeout,
inactive-timeout,
sndbuf,
destination,
aggregation,
sampler,
natevents,
promisc,
snmp-rules,
scan-min
}
STATUS current
DESCRIPTION "Read-write objects accessed via sysctl"
::= { iptNetflowGroups 2 }
iptNetflowTotalsGroup OBJECT-GROUP
OBJECTS {
inBitRate,
inPacketRate,
inFlows,
inPackets,
inBytes,
hashMetric,
hashMemory,
hashFlows,
hashPackets,
hashBytes,
dropPackets,
dropBytes,
outByteRate,
outFlows,
outPackets,
outBytes,
lostFlows,
lostPackets,
lostBytes,
errTotal,
sndbufPeak
}
STATUS current
DESCRIPTION "Statistics totals."
::= { iptNetflowGroups 3 }
iptNetflowCpuGroup OBJECT-GROUP
OBJECTS {
cpuIndex,
cpuInPacketRate,
cpuInFlows,
cpuInPackets,
cpuInBytes,
cpuHashMetric,
cpuDropPackets,
cpuDropBytes,
cpuErrTrunc,
cpuErrFrag,
cpuErrAlloc,
cpuErrMaxflows
}
STATUS current
DESCRIPTION "Per CPU statistics."
::= { iptNetflowGroups 4 }
iptNetflowSockGroup OBJECT-GROUP
OBJECTS {
sockDestination,
sockActive,
sockErrConnect,
sockErrFull,
sockErrCberr,
sockErrOther,
sockSndbuf,
sockSndbufFill,
sockSndbufPeak
}
STATUS current
DESCRIPTION "Per socket statistics."
::= { iptNetflowGroups 5 }
END
ipt-netflow-2.2/install-dkms.sh 0000755 0000000 0000000 00000005224 13213006644 015266 0 ustar root root #!/bin/bash
# This script cleanly re-install module into DKMS tree.
PATH=$PATH:/bin:/usr/bin:/usr/sbin:/sbin:/usr/local/sbin
if [ "$1" = --uninstall ]; then
echo "Uninstalling from DKMS..."
elif [ "$1" = --install ]; then
echo "Installing into DKMS..."
else
exit 1
fi
if ! which dkms >/dev/null 2>&1; then
echo "! You don't have DKMS accessible in system."
exit 1
fi
if [ ! -e dkms.conf ]; then
echo "! You don't have DKMS configured for this module."
exit 1
fi
MVERSION=`./version.sh`
contains() { for e in "${@:2}"; do [[ "$e" = "$1" ]] && return 0; done; return 1; }
D=() # to be list of installed versions
OLDIFS="$IFS"
IFS=$'\n' A=(`dkms status | grep ^ipt-netflow`)
IFS="$OLDIFS"
for i in "${A[@]}"; do
z=($i)
v=${z[1]}
v=${v%,}
v=${v%:}
if ! contains "$v" "${D[@]}"; then
D+=($v)
fi
done
if [ ${#D[@]} -eq 1 ]; then
# single version is already installed.
if [ $D = "$MVERSION" ]; then
echo "! You have same version of module already installed into DKMS."
else
echo "! You have different version of module installed into DKMS."
fi
if [ ! -d /usr/src/ipt-netflow-$D ]; then
echo "! Can not find DKMS dir for it, that's plain weird."
elif [ -e /usr/src/ipt-netflow-$D/.automatic ]; then
echo "! That version was automatically installed by this script,"
echo "! thus, is safe to remove. No worries."
else
echo "! That version was manually installed by you."
fi
nodepmod=
if grep -qs no-depmod `which dkms`; then
nodepmod=--no-depmod
fi
echo "! Removing from dkms..."
dkms $nodepmod remove ipt-netflow/$D --all
if [ -d "/usr/src/ipt-netflow-$D" ]; then
echo "! Removing source tree from /usr/src/ipt-netflow-$D"
rm -rf "/usr/src/ipt-netflow-$D"
fi
elif [ ${#D[@]} -gt 1 ]; then
# multiple versions are installed.
echo "! You have multiple versions of module already installed in DKMS."
echo "! Please remove them manually to avoid conflict."
echo "! 'dkms status' output:"
dkms status
echo "! Suggested commands to remove them:"
for i in ${D[@]}; do
echo "! root# dkms remove ipt-netflow/$i --all"
done
exit 1
fi
if [ "$1" = --uninstall ]; then
exit 0
fi
if [ "$PWD" = "/usr/src/ipt-netflow-$MVERSION" ]; then
echo "! You are already in DKMS dir."
dkms add -m ipt-netflow -v $MVERSION
exit $?
fi
echo "! Installing $MVERSION into DKMS..."
rm -rf /usr/src/ipt-netflow-$MVERSION
mkdir -p /usr/src/ipt-netflow-$MVERSION
cp -p *.[ch] Make* READ* conf* irq* *.sh *.conf /usr/src/ipt-netflow-$MVERSION/
if [ -d .git ]; then
cp -pr .git /usr/src/ipt-netflow-$MVERSION/
fi
touch /usr/src/ipt-netflow-$MVERSION/.automatic
dkms add -m ipt-netflow -v $MVERSION
exit $?
ipt-netflow-2.2/ipt_NETFLOW.c 0000644 0000000 0000000 00000463273 13213006644 014477 0 ustar root root /*
* This is NetFlow exporting module (NETFLOW target) for linux
* (c) 2008-2016 <abc@telekom.ru>
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/vmalloc.h>
#include <linux/seq_file.h>
#include <linux/random.h>
#include <linux/in6.h>
#include <linux/inet.h>
#include <linux/kernel.h>
#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/icmp.h>
#include <linux/igmp.h>
#include <linux/inetdevice.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/hash.h>
#include <linux/delay.h>
#include <linux/spinlock_types.h>
#include <linux/ktime.h>
#include <linux/if_arp.h>
#include <net/icmp.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/tcp.h>
#include <net/route.h>
#include <net/ip6_fib.h>
#include <net/addrconf.h>
#include <net/dst.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#ifndef ENABLE_NAT
# undef CONFIG_NF_NAT_NEEDED
#endif
#if defined(ENABLE_VLAN) || defined(ENABLE_PROMISC)
# include <linux/if_vlan.h>
#endif
#ifdef ENABLE_MAC
# include <linux/if_ether.h>
# include <linux/etherdevice.h>
#endif
#if defined(CONFIG_NF_NAT_NEEDED)
# include <linux/notifier.h>
# include <net/netfilter/nf_conntrack.h>
# include <net/netfilter/nf_conntrack_core.h>
#endif
#include <linux/version.h>
#include <asm/unaligned.h>
#ifdef HAVE_LLIST
/* llist.h is officially defined since linux 3.1,
* but centos6 have it backported on its 2.6.32.el6 */
# include <linux/llist.h>
#endif
#include "compat.h"
#include "ipt_NETFLOW.h"
#include "murmur3.h"
#ifdef CONFIG_BRIDGE_NETFILTER
# include <linux/netfilter_bridge.h>
#endif
#ifdef CONFIG_SYSCTL
# include <linux/sysctl.h>
#endif
#ifndef CONFIG_NF_CONNTRACK_EVENTS
/* No conntrack events in the kernel imply no natevents. */
# undef CONFIG_NF_NAT_NEEDED
#endif
#define IPT_NETFLOW_VERSION "2.2" /* Note that if you are using git, you
will see version in other format. */
#include "version.h"
#ifdef GITVERSION
#undef IPT_NETFLOW_VERSION
#define IPT_NETFLOW_VERSION GITVERSION
#endif
MODULE_LICENSE("GPL");
MODULE_AUTHOR("<abc@telekom.ru>");
MODULE_DESCRIPTION("iptables NETFLOW target module");
MODULE_VERSION(IPT_NETFLOW_VERSION);
MODULE_ALIAS("ip6t_NETFLOW");
static char version_string[128];
static int version_string_size;
static struct duration start_ts; /* ts of module start (ktime) */
#define DST_SIZE 256
static char destination_buf[DST_SIZE] = "127.0.0.1:2055";
static char *destination = destination_buf;
module_param(destination, charp, 0444);
MODULE_PARM_DESC(destination, "export destination ipaddress:port");
#ifdef ENABLE_SAMPLER
static char sampler_buf[128] = "";
static char *sampler = sampler_buf;
module_param(sampler, charp, 0444);
MODULE_PARM_DESC(sampler, "flow sampler parameters");
static atomic_t flow_count = ATOMIC_INIT(0); /* flow counter for deterministic sampler */
static atomic64_t flows_observed = ATOMIC_INIT(0);
static atomic64_t flows_selected = ATOMIC_INIT(0);
#define SAMPLER_INFO_INTERVAL (5*60)
static unsigned long ts_sampler_last = 0; /* template send time (jiffies) */
static struct duration sampling_ts; /* ts of sampling start (ktime) */
#define SAMPLER_SHIFT 14
#define SAMPLER_INTERVAL_M ((1 << SAMPLER_SHIFT) - 1)
enum {
SAMPLER_DETERMINISTIC = 1,
SAMPLER_RANDOM = 2,
SAMPLER_HASH = 3
};
struct sampling {
union {
u32 v32;
struct {
u8 mode;
u16 interval;
};
};
} samp;
#endif
static int inactive_timeout = 15;
module_param(inactive_timeout, int, 0644);
MODULE_PARM_DESC(inactive_timeout, "inactive flows timeout in seconds");
static int active_timeout = 30 * 60;
module_param(active_timeout, int, 0644);
MODULE_PARM_DESC(active_timeout, "active flows timeout in seconds");
static int exportcpu = -1;
module_param(exportcpu, int, 0644);
MODULE_PARM_DESC(exportcpu, "lock exporter to this cpu");
#ifdef ENABLE_PROMISC
static int promisc = 0;
module_param(promisc, int, 0444);
MODULE_PARM_DESC(promisc, "enable promisc hack (0=default, 1)");
static DEFINE_MUTEX(promisc_lock);
#endif
static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "debug verbosity level");
static int sndbuf;
module_param(sndbuf, int, 0444);
MODULE_PARM_DESC(sndbuf, "udp socket SNDBUF size");
static int protocol = 5;
module_param(protocol, int, 0444);
MODULE_PARM_DESC(protocol, "netflow protocol version (5, 9, 10=IPFIX)");
static unsigned int refresh_rate = 20;
module_param(refresh_rate, uint, 0644);
MODULE_PARM_DESC(refresh_rate, "NetFlow v9/IPFIX refresh rate (packets)");
static unsigned int timeout_rate = 30;
module_param(timeout_rate, uint, 0644);
MODULE_PARM_DESC(timeout_rate, "NetFlow v9/IPFIX timeout rate (minutes)");
static int one = 1;
static unsigned int scan_min = 1;
static unsigned int scan_max = HZ / 10;
module_param(scan_min, uint, 0644);
MODULE_PARM_DESC(scan_min, "Minimal interval between export scans (jiffies)");
#ifdef SNMP_RULES
static char snmp_rules_buf[DST_SIZE] = "";
static char *snmp_rules = snmp_rules_buf;
module_param(snmp_rules, charp, 0444);
MODULE_PARM_DESC(snmp_rules, "SNMP-index conversion rules");
static unsigned char *snmp_ruleset;
static DEFINE_SPINLOCK(snmp_lock);
#endif
#ifdef CONFIG_NF_NAT_NEEDED
static int natevents = 0;
module_param(natevents, int, 0444);
MODULE_PARM_DESC(natevents, "enable NAT Events");
#endif
static int hashsize;
module_param(hashsize, int, 0444);
MODULE_PARM_DESC(hashsize, "hash table size");
static int maxflows = 2000000;
module_param(maxflows, int, 0644);
MODULE_PARM_DESC(maxflows, "maximum number of flows");
static int peakflows = 0;
static unsigned long peakflows_at; /* jfffies */
static int engine_id = 0;
module_param(engine_id, int, 0644);
MODULE_PARM_DESC(engine_id, "Observation Domain ID");
#ifdef ENABLE_AGGR
#define AGGR_SIZE 1024
static char aggregation_buf[AGGR_SIZE] = "";
static char *aggregation = aggregation_buf;
module_param(aggregation, charp, 0400);
MODULE_PARM_DESC(aggregation, "aggregation ruleset");
static LIST_HEAD(aggr_n_list);
static LIST_HEAD(aggr_p_list);
static DEFINE_RWLOCK(aggr_lock);
static void aggregation_remove(struct list_head *list);
static int add_aggregation(char *ptr);
#endif
static DEFINE_PER_CPU(struct ipt_netflow_stat, ipt_netflow_stat);
static LIST_HEAD(usock_list);
static DEFINE_MUTEX(sock_lock);
#define LOCK_COUNT (1<<8)
#define LOCK_COUNT_MASK (LOCK_COUNT-1)
struct stripe_entry {
struct list_head list; /* struct ipt_netflow, list for export */
spinlock_t lock; /* this locks both: hash table stripe & list above */
};
static struct stripe_entry htable_stripes[LOCK_COUNT];
static DEFINE_RWLOCK(htable_rwlock); /* global rwlock to protect htable[] resize */
static struct hlist_head *htable __read_mostly; /* hash table memory */
static unsigned int htable_size __read_mostly = 0; /* buckets */
/* How it's organized:
* htable_rwlock locks access to htable[hash], where
* htable[htable_size] is big/resizable hash table, which is striped into
* htable_stripes[LOCK_COUNT] smaller/static hash table, which contains
* .list - list of flows ordered by exportability (usually it's access time)
* .lock - lock to both: that .list and to htable[hash], where
* hash to the htable[] is hash_netflow(&tuple) % htable_size
* hash to the htable_stripes[] is hash & LOCK_COUNT_MASK
*/
#ifdef HAVE_LLIST
static LLIST_HEAD(export_llist); /* flows to purge */
#endif
#ifdef CONFIG_NF_NAT_NEEDED
static LIST_HEAD(nat_list); /* nat events */
static DEFINE_SPINLOCK(nat_lock);
static unsigned long nat_events_start = 0;
static unsigned long nat_events_stop = 0;
#endif
static struct kmem_cache *ipt_netflow_cachep __read_mostly; /* ipt_netflow memory */
static atomic_t ipt_netflow_count = ATOMIC_INIT(0);
static long long pdu_packets = 0, pdu_traf = 0; /* how much accounted traffic in pdu */
static unsigned int pdu_count = 0;
static unsigned int pdu_seq = 0;
static unsigned int pdu_data_records = 0; /* Data records */
static unsigned int pdu_flow_records = 0; /* Data records with flows (for stat only) */
static unsigned int pdu_tpl_records = 0;
static unsigned long pdu_ts_mod; /* ts(jiffies) of last flow */
static unsigned int pdu_needs_export = 0;
static union {
__be16 version;
struct netflow5_pdu v5;
struct netflow9_pdu v9;
struct ipfix_pdu ipfix;
} pdu;
static __u8 *pdu_data_used;
static __u8 *pdu_high_wm; /* high watermark */
static struct flowset_data *pdu_flowset = NULL; /* current data flowset */
static unsigned long wk_start; /* last start of worker (jiffies) */
static unsigned long wk_busy; /* last work busy time (jiffies) */
static unsigned int wk_count; /* how much is scanned */
static unsigned int wk_cpu;
static unsigned int wk_trylock;
static unsigned int wk_llist;
static void (*netflow_export_flow)(struct ipt_netflow *nf);
static void (*netflow_export_pdu)(void); /* called on timeout */
static void netflow_switch_version(int ver);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
static void netflow_work_fn(void *work);
static DECLARE_WORK(netflow_work, netflow_work_fn, NULL);
#else
static void netflow_work_fn(struct work_struct *work);
static DECLARE_DELAYED_WORK(netflow_work, netflow_work_fn);
#endif
static struct timer_list rate_timer;
#define TCP_SYN_ACK 0x12
#define TCP_FIN_RST 0x05
static long long sec_prate = 0, sec_brate = 0;
static long long min_prate = 0, min_brate = 0;
static long long min5_prate = 0, min5_brate = 0;
#define METRIC_DFL 100
static int metric = METRIC_DFL,
min15_metric = METRIC_DFL,
min5_metric = METRIC_DFL,
min_metric = METRIC_DFL; /* hash metrics */
static int set_hashsize(int new_size);
static void destination_removeall(void);
static int add_destinations(const char *ptr);
static int netflow_scan_and_export(int flush);
enum {
DONT_FLUSH, AND_FLUSH
};
static int template_ids = FLOWSET_DATA_FIRST;
static int tpl_count = 0; /* how much active templates */
#define STAT_INTERVAL (1*60)
#define SYSINFO_INTERVAL (5*60)
static unsigned long ts_stat_last = 0; /* (jiffies) */
static unsigned long ts_sysinf_last = 0; /* (jiffies) */
static unsigned long ts_ifnames_last = 0; /* (jiffies) */
static inline __be32 bits2mask(int bits) {
return (bits? 0xffffffff << (32 - bits) : 0);
}
static inline int mask2bits(__be32 mask) {
int n;
for (n = 0; mask; n++)
mask = (mask << 1) & 0xffffffff;
return n;
}
/* under that lock worker is always stopped and not rescheduled,
* and we can call worker sub-functions manually */
static DEFINE_MUTEX(worker_lock);
static int worker_delay = HZ / 10;
static inline void _schedule_scan_worker(const int pdus)
{
int cpu = exportcpu;
/* rudimentary congestion avoidance */
if (pdus > 0)
worker_delay /= pdus;
else
worker_delay *= 2;
if (worker_delay < scan_min)
worker_delay = scan_min;
else if (worker_delay > scan_max)
worker_delay = scan_max;
if (cpu >= 0) {
if (cpu < NR_CPUS &&
cpu_online(cpu)) {
schedule_delayed_work_on(cpu, &netflow_work, worker_delay);
return;
}
printk(KERN_WARNING "ipt_NETFLOW: can't schedule exporter on cpu %d. Disabling cpu lock.\n",
cpu);
exportcpu = -1;
}
schedule_delayed_work(&netflow_work, worker_delay);
}
/* This is only called soon after pause_scan_worker. */
static inline void cont_scan_worker(void)
{
_schedule_scan_worker(0);
mutex_unlock(&worker_lock);
}
static inline void _unschedule_scan_worker(void)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
cancel_rearming_delayed_work(&netflow_work);
#else
cancel_delayed_work_sync(&netflow_work);
#endif
}
/* This is only used for quick pause (in procctl). */
static inline void pause_scan_worker(void)
{
mutex_lock(&worker_lock);
_unschedule_scan_worker();
}
#ifdef ENABLE_SAMPLER
static inline unsigned char get_sampler_mode(void)
{
return samp.mode;
}
static inline unsigned short get_sampler_interval(void)
{
return samp.interval;
}
static inline const char *sampler_mode_string(void)
{
const unsigned char mode = get_sampler_mode();
return mode == SAMPLER_DETERMINISTIC? "deterministic" :
mode == SAMPLER_RANDOM? "random" : "hash";
}
/* map SAMPLER_HASH into SAMPLER_RANDOM */
static unsigned char get_sampler_mode_nf(void)
{
const unsigned char mode = get_sampler_mode();
return (mode == SAMPLER_HASH)? SAMPLER_RANDOM : mode;
}
static inline unsigned short sampler_nf_v5(void)
{
return (get_sampler_mode_nf() << SAMPLER_SHIFT) | get_sampler_interval();
}
#endif
/* return value is different from usual snprintf */
static char *snprintf_sockaddr(char *buf, size_t len, const struct sockaddr_storage *ss)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
if (ss->ss_family == AF_INET) {
const struct sockaddr_in *sin = (struct sockaddr_in *)ss;
snprintf(buf, len, "%u.%u.%u.%u:%u",
NIPQUAD(sin->sin_addr.s_addr),
ntohs(sin->sin_port));
} else if (ss->ss_family == AF_INET6) {
const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)ss;
snprintf(buf, len, "[%x:%x:%x:%x:%x:%x:%x:%x]:%u",
ntohs(sin6->sin6_addr.s6_addr16[0]),
ntohs(sin6->sin6_addr.s6_addr16[1]),
ntohs(sin6->sin6_addr.s6_addr16[2]),
ntohs(sin6->sin6_addr.s6_addr16[3]),
ntohs(sin6->sin6_addr.s6_addr16[4]),
ntohs(sin6->sin6_addr.s6_addr16[5]),
ntohs(sin6->sin6_addr.s6_addr16[6]),
ntohs(sin6->sin6_addr.s6_addr16[7]),
ntohs(sin6->sin6_port));
} else
snprintf(buf, len, "(invalid address)");
#elif LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
if (ss->ss_family == AF_INET)
snprintf(buf, len, "%pI4:%u",
&((const struct sockaddr_in *)ss)->sin_addr,
ntohs(((const struct sockaddr_in *)ss)->sin_port));
else if (ss->ss_family == AF_INET6)
snprintf(buf, len, "[%pI6c]:%u",
&((const struct sockaddr_in6 *)ss)->sin6_addr,
ntohs(((const struct sockaddr_in6 *)ss)->sin6_port));
else
snprintf(buf, len, "(invalid address)");
#else
snprintf(buf, len, "%pISpc", ss);
#endif
return buf;
}
static char *print_sockaddr(const struct sockaddr_storage *ss)
{
static char buf[64];
return snprintf_sockaddr(buf, sizeof(buf), ss);
}
static int is_zero_addr(const struct sockaddr_storage *ss)
{
if (ss->ss_family == AF_INET)
return ((const struct sockaddr_in *)ss)->sin_addr.s_addr == 0;
else if (ss->ss_family == AF_INET6)
return ((const struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[0] == 0 &&
((const struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[1] == 0 &&
((const struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[2] == 0 &&
((const struct sockaddr_in6 *)ss)->sin6_addr.s6_addr32[3] == 0;
else /* AF_UNSPEC */
return 1;
}
static char *print_usock_addr(struct ipt_netflow_sock *usock)
{
static char buf[128];
size_t len;
snprintf(buf, sizeof(buf), "%s", print_sockaddr(&usock->addr));
if (!is_zero_addr(&usock->saddr)) {
len = strlen(buf);
snprintf(buf + len, sizeof(buf) - len, "@%s",
print_sockaddr(&usock->saddr));
len = strlen(buf);
/* strip zero port */
if (len > 2 && buf[len - 1] == '0' && buf[len - 2] == ':')
buf[len - 2] = '\0';
}
if (usock->sdev[0]) {
len = strlen(buf);
snprintf(buf + len, sizeof(buf) - len, "%%%s", usock->sdev);
}
return buf;
}
#ifdef CONFIG_PROC_FS
static inline int ABS(int x) { return x >= 0 ? x : -x; }
#define SAFEDIV(x,y) ((y)? ({ u64 __tmp = x; do_div(__tmp, y); (int)__tmp; }) : 0)
#define FFLOAT(x, prec) (int)(x) / prec, ABS((int)(x) % prec)
static int snmp_seq_show(struct seq_file *seq, void *v)
{
int cpu;
unsigned int nr_flows = atomic_read(&ipt_netflow_count);
struct ipt_netflow_stat t = { 0 };
struct ipt_netflow_sock *usock;
unsigned int sndbuf_peak = 0;
int snum = 0;
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
t.notfound += st->notfound;
t.pkt_total += st->pkt_total;
t.traf_total += st->traf_total;
t.send_failed += st->send_failed;
t.sock_cberr += st->sock_cberr;
t.exported_rate += st->exported_rate;
t.exported_pkt += st->exported_pkt;
t.exported_flow += st->exported_flow;
t.exported_traf += st->exported_traf;
t.pkt_drop += st->pkt_drop;
t.traf_drop += st->traf_drop;
t.pkt_lost += st->pkt_lost;
t.traf_lost += st->traf_lost;
t.flow_lost += st->flow_lost;
}
seq_printf(seq,
"inBitRate %llu\n"
"inPacketRate %llu\n"
"inFlows %llu\n"
"inPackets %llu\n"
"inBytes %llu\n"
"hashMetric %d.%02d\n"
"hashMemory %lu\n"
"hashFlows %u\n"
"hashPackets %llu\n"
"hashBytes %llu\n"
"dropPackets %llu\n"
"dropBytes %llu\n"
"outByteRate %u\n"
"outFlows %llu\n"
"outPackets %llu\n"
"outBytes %llu\n"
"lostFlows %llu\n"
"lostPackets %llu\n"
"lostBytes %llu\n"
"errTotal %u\n",
sec_brate,
sec_prate,
t.notfound,
t.pkt_total,
t.traf_total,
FFLOAT(SAFEDIV(100LL * (t.searched + t.found + t.notfound), (t.found + t.notfound)), 100),
(unsigned long)nr_flows * sizeof(struct ipt_netflow) +
(unsigned long)htable_size * sizeof(struct hlist_head),
nr_flows,
t.pkt_total - t.pkt_out,
t.traf_total - t.traf_out,
t.pkt_drop,
t.traf_drop,
t.exported_rate,
t.exported_flow,
t.exported_pkt,
t.exported_traf,
t.flow_lost,
t.pkt_lost,
t.traf_lost,
t.send_failed + t.sock_cberr);
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
seq_printf(seq,
"cpu%u %u %llu %llu %llu %d.%02d %llu %llu %u %u %u %u\n",
cpu,
st->pkt_total_rate,
st->notfound,
st->pkt_total,
st->traf_total,
FFLOAT(st->metric, 100),
st->pkt_drop,
st->traf_drop,
st->truncated,
st->frags,
st->alloc_err,
st->maxflows_err);
}
mutex_lock(&sock_lock);
list_for_each_entry(usock, &usock_list, list) {
int wmem_peak = atomic_read(&usock->wmem_peak);
if (sndbuf_peak < wmem_peak)
sndbuf_peak = wmem_peak;
seq_printf(seq, "sock%d %s %d %u %u %u %u",
snum,
print_usock_addr(usock),
!!usock->sock,
usock->err_connect,
usock->err_full,
usock->err_cberr,
usock->err_other);
if (usock->sock) {
struct sock *sk = usock->sock->sk;
seq_printf(seq, " %u %u %u\n",
sk->sk_sndbuf,
compat_refcount_read(&sk->sk_wmem_alloc),
wmem_peak);
} else
seq_printf(seq, " 0 0 %u\n", wmem_peak);
snum++;
}
mutex_unlock(&sock_lock);
seq_printf(seq, "sndbufPeak %u\n", sndbuf_peak);
return 0;
}
/* procfs statistics /proc/net/stat/ipt_netflow */
static int nf_seq_show(struct seq_file *seq, void *v)
{
unsigned int nr_flows = atomic_read(&ipt_netflow_count);
int cpu;
struct ipt_netflow_stat t = { 0 };
struct ipt_netflow_sock *usock;
#ifdef ENABLE_AGGR
struct netflow_aggr_n *aggr_n;
struct netflow_aggr_p *aggr_p;
#endif
int snum = 0;
int peak = (jiffies - peakflows_at) / HZ;
seq_printf(seq, "ipt_NETFLOW " IPT_NETFLOW_VERSION ", srcversion %s;"
#ifdef ENABLE_AGGR
" aggr"
#endif
#ifdef ENABLE_DIRECTION
" dir"
#endif
#ifdef HAVE_LLIST
" llist"
#endif
#ifdef ENABLE_MAC
" mac"
#endif
#ifdef CONFIG_NF_NAT_NEEDED
" nel"
#endif
#ifdef ENABLE_PROMISC
" promisc"
# ifdef PROMISC_MPLS
"+mpls"
# endif
#endif
#ifdef ENABLE_SAMPLER
" samp"
# ifdef SAMPLING_HASH
"-h"
# endif
#endif
#ifdef SNMP_RULES
" snmp"
#endif
#ifdef ENABLE_VLAN
" vlan"
#endif
"\n",
THIS_MODULE->srcversion);
seq_printf(seq, "Protocol version %d", protocol);
if (protocol == 10)
seq_printf(seq, " (ipfix)");
else
seq_printf(seq, " (netflow)");
if (protocol >= 9)
seq_printf(seq, ", refresh-rate %u, timeout-rate %u, (templates %d, active %d).\n",
refresh_rate, timeout_rate, template_ids - FLOWSET_DATA_FIRST, tpl_count);
else
seq_printf(seq, "\n");
seq_printf(seq, "Timeouts: active %ds, inactive %ds. Maxflows %u\n",
active_timeout,
inactive_timeout,
maxflows);
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
t.searched += st->searched;
t.found += st->found;
t.notfound += st->notfound;
t.pkt_total += st->pkt_total;
t.traf_total += st->traf_total;
#ifdef ENABLE_PROMISC
t.pkt_promisc += st->pkt_promisc;
t.pkt_promisc_drop += st->pkt_promisc_drop;
#endif
t.truncated += st->truncated;
t.frags += st->frags;
t.maxflows_err += st->maxflows_err;
t.alloc_err += st->alloc_err;
t.send_failed += st->send_failed;
t.sock_cberr += st->sock_cberr;
t.exported_rate += st->exported_rate;
t.exported_pkt += st->exported_pkt;
t.exported_flow += st->exported_flow;
t.exported_traf += st->exported_traf;
t.pkt_total_rate += st->pkt_total_rate;
t.pkt_drop += st->pkt_drop;
t.traf_drop += st->traf_drop;
t.pkt_lost += st->pkt_lost;
t.traf_lost += st->traf_lost;
t.flow_lost += st->flow_lost;
t.pkt_out += st->pkt_out;
t.traf_out += st->traf_out;
#ifdef ENABLE_SAMPLER
t.pkts_observed += st->pkts_observed;
t.pkts_selected += st->pkts_selected;
#endif
}
#ifdef ENABLE_SAMPLER
if (get_sampler_mode()) {
seq_printf(seq, "Flow sampling mode %s one-out-of %u.",
sampler_mode_string(),
get_sampler_interval());
if (get_sampler_mode() != SAMPLER_HASH)
seq_printf(seq, " Flows selected %lu, discarded %lu.",
atomic64_read(&flows_selected),
atomic64_read(&flows_observed) - atomic64_read(&flows_selected));
else
seq_printf(seq, " Flows selected %lu.", atomic64_read(&flows_selected));
seq_printf(seq, " Pkts selected %llu, discarded %llu.\n",
t.pkts_selected,
t.pkts_observed - t.pkts_selected);
} else
seq_printf(seq, "Flow sampling is disabled.\n");
#endif
#ifdef ENABLE_PROMISC
seq_printf(seq, "Promisc hack is %s (observed %llu packets, discarded %llu).\n",
promisc? "enabled" : "disabled",
t.pkt_promisc,
t.pkt_promisc_drop);
#endif
#ifdef CONFIG_NF_NAT_NEEDED
seq_printf(seq, "Natevents %s, count start %lu, stop %lu.\n", natevents? "enabled" : "disabled",
nat_events_start, nat_events_stop);
#endif
seq_printf(seq, "Flows: active %u (peak %u reached %ud%uh%um ago), mem %uK, worker delay %d/%d"
" [%d..%d] (%u ms, %u us, %u:%u"
#ifdef HAVE_LLIST
" %u"
#endif
" [cpu%u]).\n",
nr_flows,
peakflows,
peak / (60 * 60 * 24), (peak / (60 * 60)) % 24, (peak / 60) % 60,
(unsigned int)(((unsigned long)nr_flows * sizeof(struct ipt_netflow) +
(unsigned long)htable_size * sizeof(struct hlist_head)) >> 10),
worker_delay, HZ,
scan_min, scan_max,
jiffies_to_msecs(jiffies - wk_start),
jiffies_to_usecs(wk_busy),
wk_count,
wk_trylock,
#ifdef HAVE_LLIST
wk_llist,
#endif
wk_cpu);
seq_printf(seq, "Hash: size %u (mem %uK), metric %d.%02d [%d.%02d, %d.%02d, %d.%02d]."
" InHash: %llu pkt, %llu K, InPDU %llu, %llu.\n",
htable_size,
(unsigned int)((htable_size * sizeof(struct hlist_head)) >> 10),
FFLOAT(metric, 100),
FFLOAT(min_metric, 100),
FFLOAT(min5_metric, 100),
FFLOAT(min15_metric, 100),
t.pkt_total - t.pkt_out,
(t.traf_total - t.traf_out) >> 10,
pdu_packets,
pdu_traf);
seq_printf(seq, "Rate: %llu bits/sec, %llu packets/sec;"
" Avg 1 min: %llu bps, %llu pps; 5 min: %llu bps, %llu pps\n",
sec_brate, sec_prate, min_brate, min_prate, min5_brate, min5_prate);
seq_printf(seq, "cpu# pps; <search found new [metric], trunc frag alloc maxflows>,"
" traffic: <pkt, bytes>, drop: <pkt, bytes>\n");
seq_printf(seq, "Total %6u; %6llu %6llu %6llu [%d.%02d], %4u %4u %4u %4u,"
" traffic: %llu, %llu MB, drop: %llu, %llu K\n",
t.pkt_total_rate,
t.searched,
t.found,
t.notfound,
FFLOAT(SAFEDIV(100LL * (t.searched + t.found + t.notfound), (t.found + t.notfound)), 100),
t.truncated, t.frags, t.alloc_err, t.maxflows_err,
t.pkt_total, t.traf_total >> 20,
t.pkt_drop, t.traf_drop >> 10);
if (num_present_cpus() > 1) {
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st;
st = &per_cpu(ipt_netflow_stat, cpu);
seq_printf(seq, "cpu%-2u %6u; %6llu %6llu %6llu [%d.%02d], %4u %4u %4u %4u,"
" traffic: %llu, %llu MB, drop: %llu, %llu K\n",
cpu,
st->pkt_total_rate,
st->searched,
st->found,
st->notfound,
FFLOAT(st->metric, 100),
st->truncated, st->frags, st->alloc_err, st->maxflows_err,
st->pkt_total, st->traf_total >> 20,
st->pkt_drop, st->traf_drop >> 10);
}
}
seq_printf(seq, "Export: Rate %u bytes/s; Total %llu pkts, %llu MB, %llu flows;"
" Errors %u pkts; Traffic lost %llu pkts, %llu Kbytes, %llu flows.\n",
t.exported_rate,
t.exported_pkt,
t.exported_traf >> 20,
t.exported_flow,
t.send_failed,
t.pkt_lost,
t.traf_lost >> 10,
t.flow_lost);
mutex_lock(&sock_lock);
list_for_each_entry(usock, &usock_list, list) {
seq_printf(seq, "sock%d: %s",
snum,
print_usock_addr(usock));
if (usock->sock) {
struct sock *sk = usock->sock->sk;
seq_printf(seq, ", sndbuf %u, filled %u, peak %u;"
" err: sndbuf reached %u, connect %u, cberr %u, other %u\n",
sk->sk_sndbuf,
compat_refcount_read(&sk->sk_wmem_alloc),
atomic_read(&usock->wmem_peak),
usock->err_full,
usock->err_connect,
usock->err_cberr,
usock->err_other);
} else
seq_printf(seq, " unconnected (%u attempts).\n",
usock->err_connect);
snum++;
}
mutex_unlock(&sock_lock);
#ifdef ENABLE_AGGR
read_lock_bh(&aggr_lock);
snum = 0;
list_for_each_entry(aggr_n, &aggr_n_list, list) {
seq_printf(seq, "aggr#%d net: match %u.%u.%u.%u/%d strip %d (usage %u)\n",
snum,
HIPQUAD(aggr_n->addr),
mask2bits(aggr_n->mask),
mask2bits(aggr_n->aggr_mask),
atomic_read(&aggr_n->usage));
snum++;
}
snum = 0;
list_for_each_entry(aggr_p, &aggr_p_list, list) {
seq_printf(seq, "aggr#%d port: ports %u-%u replace %u (usage %u)\n",
snum,
aggr_p->port1,
aggr_p->port2,
aggr_p->aggr_port,
atomic_read(&aggr_p->usage));
snum++;
}
read_unlock_bh(&aggr_lock);
#endif
#ifdef SNMP_RULES
{
const unsigned char *rules;
snum = 0;
rcu_read_lock();
rules = rcu_dereference(snmp_ruleset);
if (rules)
while (*rules) {
const unsigned int len = *rules++;
seq_printf(seq, "SNMP-rule#%d: prefix '%.*s' map to %d\n",
snum, len, rules, (rules[len] << 8) + rules[len + 1]);
rules += len + 2;
++snum;
}
rcu_read_unlock();
}
#endif
return 0;
}
static int nf_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, nf_seq_show, NULL);
}
static int snmp_seq_open(struct inode *inode, struct file *file)
{
return single_open(file, snmp_seq_show, NULL);
}
static struct file_operations nf_seq_fops = {
.owner = THIS_MODULE,
.open = nf_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static struct file_operations snmp_seq_fops = {
.owner = THIS_MODULE,
.open = snmp_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static inline int inactive_needs_export(const struct ipt_netflow *nf, const long i_timeout,
const unsigned long jiff);
static inline int active_needs_export(const struct ipt_netflow *nf, const long a_timeout,
const unsigned long jiff);
static inline u_int32_t hash_netflow(const struct ipt_netflow_tuple *tuple);
struct flows_dump_private {
int pcache; /* pos */
void *vcache; /* corresponding pointer for pos */
int stripe; /* current stripe */
struct list_head list; /* copy of stripe */
int alloc_errors;
};
/* deallocate copied stripe */
static void nf_free_stripe(struct list_head *list)
{
struct ipt_netflow *cf, *tmp;
list_for_each_entry_safe(cf, tmp, list, flows_list) {
kmem_cache_free(ipt_netflow_cachep, cf);
}
INIT_LIST_HEAD(list);
}
/* quickly clone stripe into flows_dump_private then it can be walked slowly
* and lockless */
static void __nf_copy_stripe(struct flows_dump_private *st, const struct list_head *list)
{
const struct ipt_netflow *nf;
struct ipt_netflow *cf;
nf_free_stripe(&st->list);
list_for_each_entry(nf, list, flows_list) {
cf = kmem_cache_alloc(ipt_netflow_cachep, GFP_ATOMIC);
if (!cf) {
st->alloc_errors++;
continue;
}
memcpy(cf, nf, sizeof(*cf));
list_add(&cf->flows_list, &st->list);
}
}
/* nstripe is desired stripe, in st->stripe will be recorded actual stripe used
* (with empty stripes skipped), -1 is there is no valid stripes anymore,
* return first element in stripe list or NULL */
static struct list_head *nf_get_stripe(struct flows_dump_private *st, int nstripe)
{
read_lock_bh(&htable_rwlock);
for (; nstripe < LOCK_COUNT; nstripe++) {
struct stripe_entry *stripe = &htable_stripes[nstripe];
spin_lock(&stripe->lock);
if (!list_empty(&stripe->list)) {
st->stripe = nstripe;
__nf_copy_stripe(st, &stripe->list);
spin_unlock(&stripe->lock);
read_unlock_bh(&htable_rwlock);
return st->list.next;
}
spin_unlock(&stripe->lock);
}
read_unlock_bh(&htable_rwlock);
st->stripe = -1;
return NULL;
}
/* simply next element in flows list or NULL */
static struct list_head *nf_get_next(struct flows_dump_private *st, struct list_head *head)
{
if (head == SEQ_START_TOKEN)
return nf_get_stripe(st, 0);
if (st->stripe < 0)
return NULL;
/* next element */
if (!list_is_last(head, &st->list))
return head->next;
/* next bucket */
return nf_get_stripe(st, st->stripe + 1);
}
/* seq_file could arbitrarily start/stop iteration as it feels need,
* so, I try to cache things to (significantly) speed it up. */
static void *flows_dump_seq_start(struct seq_file *seq, loff_t *pos)
{
struct flows_dump_private *st = seq->private;
int ppos = *pos;
struct list_head *lh;
if (!ppos) {
/* first */
st->pcache = 0;
st->vcache = SEQ_START_TOKEN;
return st->vcache;
}
if (ppos >= st->pcache) {
/* can iterate forward */
ppos -= st->pcache;
lh = st->vcache;
} else /* can't, start from 0 */
lh = SEQ_START_TOKEN;
/* iterate forward */
while (ppos--)
lh = nf_get_next(st, lh);
st->pcache = *pos;
st->vcache = lh;
return st->vcache;
}
static void *flows_dump_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct flows_dump_private *st = seq->private;
st->pcache = ++*pos;
st->vcache = nf_get_next(st, (struct list_head *)v);
return st->vcache;
}
static void flows_dump_seq_stop(struct seq_file *seq, void *v)
{
}
/* To view this: cat /sys/kernel/debug/netflow_dump */
static int flows_dump_seq_show(struct seq_file *seq, void *v)
{
struct flows_dump_private *st = seq->private;
const long i_timeout = inactive_timeout * HZ;
const long a_timeout = active_timeout * HZ;
const struct ipt_netflow *nf;
if (v == SEQ_START_TOKEN) {
seq_printf(seq, "# hash a dev:i,o"
#ifdef SNMP_RULES
" snmp:i,o"
#endif
#ifdef ENABLE_MAC
" mac:src,dst"
#endif
#ifdef ENABLE_VLAN
" vlan"
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
" type"
#endif
" proto src:ip,port dst:ip,port nexthop"
" tos,tcpflags,options,tcpoptions"
" packets bytes ts:first,last\n");
return 0;
}
nf = list_entry(v, struct ipt_netflow, flows_list);
seq_printf(seq, "%d %04x %x",
st->pcache,
hash_netflow(&nf->tuple),
(!!inactive_needs_export(nf, i_timeout, jiffies)) |
(active_needs_export(nf, a_timeout, jiffies) << 1));
seq_printf(seq, " %hd,%hd",
nf->tuple.i_ifc,
nf->o_ifc);
#ifdef SNMP_RULES
seq_printf(seq, " %hd,%hd",
nf->i_ifcr,
nf->o_ifcr);
#endif
#ifdef ENABLE_MAC
seq_printf(seq, " %pM,%pM", &nf->tuple.h_src, &nf->tuple.h_dst);
#endif
#ifdef ENABLE_VLAN
if (nf->tuple.tag[0]) {
seq_printf(seq, " %d", ntohs(nf->tuple.tag[0]));
if (nf->tuple.tag[1])
seq_printf(seq, ",%d", ntohs(nf->tuple.tag[1]));
}
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
seq_printf(seq, " %04x", ntohs(nf->ethernetType));
#endif
seq_printf(seq, " %u ",
nf->tuple.protocol);
if (nf->tuple.l3proto == AF_INET) {
seq_printf(seq, "%pI4n,%u %pI4n,%u %pI4n",
&nf->tuple.src,
ntohs(nf->tuple.s_port),
&nf->tuple.dst,
ntohs(nf->tuple.d_port),
&nf->nh);
} else if (nf->tuple.l3proto == AF_INET6) {
seq_printf(seq, "%pI6c,%u %pI6c,%u %pI6c",
&nf->tuple.src,
ntohs(nf->tuple.s_port),
&nf->tuple.dst,
ntohs(nf->tuple.d_port),
&nf->nh);
} else {
seq_puts(seq, "?,? ?,? ?");
}
seq_printf(seq, " %x,%x,%x,%x",
nf->tuple.tos,
nf->tcp_flags,
nf->options,
nf->tcpoptions);
seq_printf(seq, " %u %u %lu,%lu\n",
nf->nr_packets,
nf->nr_bytes,
jiffies - nf->nf_ts_first,
jiffies - nf->nf_ts_last);
return 0;
}
static struct seq_operations flows_dump_seq_ops = {
.start = flows_dump_seq_start,
.show = flows_dump_seq_show,
.next = flows_dump_seq_next,
.stop = flows_dump_seq_stop,
};
static int flows_seq_open(struct inode *inode, struct file *file)
{
struct flows_dump_private *st;
char *buf;
const size_t size = 4 * PAGE_SIZE;
buf = kmalloc(size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
st = __seq_open_private(file, &flows_dump_seq_ops, sizeof(struct flows_dump_private));
if (!st) {
kfree(buf);
return -ENOMEM;
}
INIT_LIST_HEAD(&st->list);
/* speed up seq interface with bigger buffer */
((struct seq_file *)file->private_data)->buf = buf;
((struct seq_file *)file->private_data)->size = size;
return 0;
}
static int flows_seq_release(struct inode *inode, struct file *file)
{
struct seq_file *seq = file->private_data;
struct flows_dump_private *st = seq->private;
nf_free_stripe(&st->list);
if (st->alloc_errors)
printk(KERN_INFO "ipt_NETFLOW: alloc_errors %d\n", st->alloc_errors);
return seq_release_private(inode, file);
}
static struct file_operations flows_seq_fops = {
.owner = THIS_MODULE,
.open = flows_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = flows_seq_release,
};
#endif /* CONFIG_PROC_FS */
#ifdef ENABLE_PROMISC
static int promisc_finish(
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0)
struct net *net,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0) || \
(defined(RHEL_MAJOR) && RHEL_MAJOR == 7 && RHEL_MINOR >= 2)
struct sock *sk,
#endif
struct sk_buff *skb)
{
/* don't pass to the routing */
kfree_skb(skb);
return NET_RX_DROP;
}
static int promisc4_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
const struct iphdr *iph;
u32 len;
/* clone skb and do basic IPv4 sanity checking and preparations
* for L3, this is quick and dirty version of ip_rcv() */
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto drop;
iph = ip_hdr(skb);
if (iph->ihl < 5 || iph->version != 4)
goto drop;
if (!pskb_may_pull(skb, iph->ihl*4))
goto drop;
iph = ip_hdr(skb);
if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
goto drop;
len = ntohs(iph->tot_len);
if (skb->len < len)
goto drop;
else if (len < (iph->ihl*4))
goto drop;
if (pskb_trim_rcsum(skb, len))
goto drop;
skb->transport_header = skb->network_header + iph->ihl*4;
memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
skb_orphan(skb);
return NF_HOOK(NFPROTO_IPV4, NF_INET_PRE_ROUTING,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0)
dev_net(dev),
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0) || (defined(RHEL_MAJOR) && RHEL_MAJOR == 7 && RHEL_MINOR > 1)
NULL,
#endif
skb, dev, NULL, promisc_finish);
drop:
NETFLOW_STAT_INC(pkt_promisc_drop);
kfree_skb(skb);
return NET_RX_DROP;
}
static int promisc6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
const struct ipv6hdr *hdr;
u32 pkt_len;
struct inet6_dev *idev;
/* quick and dirty version of ipv6_rcv(), basic sanity checking
* and preparation of skb for later processing */
rcu_read_lock();
idev = __in6_dev_get(skb->dev);
if (!idev || unlikely(idev->cnf.disable_ipv6))
goto drop;
memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
IP6CB(skb)->iif = skb_dst(skb) ? ip6_dst_idev(skb_dst(skb))->dev->ifindex : dev->ifindex;
if (unlikely(!pskb_may_pull(skb, sizeof(*hdr))))
goto drop;
hdr = ipv6_hdr(skb);
if (hdr->version != 6)
goto drop;
if (!(dev->flags & IFF_LOOPBACK) &&
ipv6_addr_loopback(&hdr->daddr))
goto drop;
if (!(skb->pkt_type == PACKET_LOOPBACK ||
dev->flags & IFF_LOOPBACK) &&
ipv6_addr_is_multicast(&hdr->daddr) &&
IPV6_ADDR_MC_SCOPE(&hdr->daddr) == 1)
goto drop;
if (ipv6_addr_is_multicast(&hdr->daddr) &&
IPV6_ADDR_MC_SCOPE(&hdr->daddr) == 0)
goto drop;
if (ipv6_addr_is_multicast(&hdr->saddr))
goto drop;
skb->transport_header = skb->network_header + sizeof(*hdr);
IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
pkt_len = ntohs(hdr->payload_len);
if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
if (pkt_len + sizeof(struct ipv6hdr) > skb->len)
goto drop;
if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr)))
goto drop;
hdr = ipv6_hdr(skb);
}
if (hdr->nexthdr == NEXTHDR_HOP) {
int optlen;
/* ipv6_parse_hopopts() is not exported by kernel.
* I dont really need to parse hop options, since packets
* are not routed, nor terminated, but I keep calculations
* in case other code depend on it. */
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr) + 8) ||
!pskb_may_pull(skb, (sizeof(struct ipv6hdr) +
((skb_transport_header(skb)[1] + 1) << 3))))
goto drop;
optlen = (skb_transport_header(skb)[1] + 1) << 3;
if (skb_transport_offset(skb) + optlen > skb_headlen(skb))
goto drop;
skb->transport_header += optlen;
IP6CB(skb)->nhoff = sizeof(struct ipv6hdr);
}
rcu_read_unlock();
skb_orphan(skb);
return NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,4,0)
dev_net(dev),
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,1,0) || (defined(RHEL_MAJOR) && RHEL_MAJOR == 7 && RHEL_MINOR > 1)
NULL,
#endif
skb, dev, NULL, promisc_finish);
drop:
rcu_read_unlock();
NETFLOW_STAT_INC(pkt_promisc_drop);
kfree_skb(skb);
return NET_RX_DROP;
}
/* source is skb_network_protocol() and __vlan_get_protocol() */
static __be16 __skb_network_protocol(struct sk_buff *skb, int *depth)
{
__be16 type = skb->protocol;
unsigned int vlan_depth;
if (type == htons(ETH_P_TEB)) {
struct ethhdr *eth;
if (unlikely(!pskb_may_pull(skb, sizeof(struct ethhdr))))
return 0;
eth = (struct ethhdr *)skb_mac_header(skb);
type = eth->h_proto;
}
vlan_depth = skb->mac_len;
if (type == htons(ETH_P_8021Q) || type == htons(ETH_P_8021AD)) {
if (vlan_depth) {
if (WARN_ON(vlan_depth < VLAN_HLEN))
return 0;
vlan_depth -= VLAN_HLEN;
} else {
vlan_depth = ETH_HLEN;
}
do {
struct vlan_hdr *vh;
if (unlikely(!pskb_may_pull(skb, vlan_depth + VLAN_HLEN)))
return 0;
vh = (struct vlan_hdr *)(skb->data + vlan_depth);
type = vh->h_vlan_encapsulated_proto;
vlan_depth += VLAN_HLEN;
} while (type == htons(ETH_P_8021Q) ||
type == htons(ETH_P_8021AD));
}
*depth = vlan_depth;
return type;
}
static int promisc_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
{
/* what is not PACKET_OTHERHOST will be processed normally */
if (skb->pkt_type != PACKET_OTHERHOST)
goto out;
NETFLOW_STAT_INC(pkt_promisc);
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
goto drop;
/* Note about vlans:
* - older kernels will pass raw packet;
* - newer kernes (since 3.0) will have one vlan tag
* physically stripped out of the packet, and it will
* be saved into skb->vlan_tci. skb->protocol will be
* untagged etherType. */
if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
skb->protocol == cpu_to_be16(ETH_P_8021AD)) {
int vlan_depth = skb->mac_len;
skb_push(skb, skb->data - skb_mac_header(skb));
skb->protocol = __skb_network_protocol(skb, &vlan_depth);
skb_pull(skb, vlan_depth);
skb_reset_network_header(skb);
skb_reset_mac_len(skb);
}
# ifdef PROMISC_MPLS
if (eth_p_mpls(skb->protocol)) {
size_t stack_len = 0;
const struct mpls_label *mpls;
do {
stack_len += MPLS_HLEN;
if (unlikely(!pskb_may_pull(skb, stack_len)))
goto drop;
mpls = (struct mpls_label *)(skb->data + stack_len - MPLS_HLEN);
} while (!(mpls->entry & htonl(MPLS_LS_S_MASK)));
skb_pull(skb, stack_len);
skb_reset_network_header(skb);
if (!pskb_may_pull(skb, 1))
goto drop;
switch (ip_hdr(skb)->version) {
case 4: skb->protocol = htons(ETH_P_IP); break;
case 6: skb->protocol = htons(ETH_P_IPV6); break;
default: goto drop;
}
}
# endif
switch (skb->protocol) {
case htons(ETH_P_IP):
return promisc4_rcv(skb, dev, pt, orig_dev);
case htons(ETH_P_IPV6):
return promisc6_rcv(skb, dev, pt, orig_dev);
}
drop:
NETFLOW_STAT_INC(pkt_promisc_drop);
out:
kfree_skb(skb);
return 0;
}
static struct packet_type promisc_packet_type __read_mostly = {
.type = htons(ETH_P_ALL),
.func = promisc_rcv,
};
/* should not have promisc passed as parameter */
static int switch_promisc(int newpromisc)
{
newpromisc = !!newpromisc;
mutex_lock(&promisc_lock);
if (newpromisc == promisc)
goto unlock;
if (newpromisc)
dev_add_pack(&promisc_packet_type);
else
dev_remove_pack(&promisc_packet_type);
printk(KERN_INFO "ipt_NETFLOW: promisc hack is %s\n",
newpromisc? "enabled" : "disabled");
promisc = newpromisc;
unlock:
mutex_unlock(&promisc_lock);
return 0;
}
#endif
#ifdef CONFIG_SYSCTL
/* sysctl /proc/sys/net/netflow */
static int hsize_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret, hsize;
ctl_table_no_const lctl = *ctl;
if (write)
lctl.data = &hsize;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (write) {
if (hsize < LOCK_COUNT)
return -EPERM;
return set_hashsize(hsize)?:ret;
} else
return ret;
}
static int sndbuf_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
struct ipt_netflow_sock *usock;
ctl_table_no_const lctl = *ctl;
mutex_lock(&sock_lock);
if (list_empty(&usock_list)) {
mutex_unlock(&sock_lock);
return -ENOENT;
}
usock = list_first_entry(&usock_list, struct ipt_netflow_sock, list);
if (usock->sock)
sndbuf = usock->sock->sk->sk_sndbuf;
mutex_unlock(&sock_lock);
lctl.data = &sndbuf;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (!write)
return ret;
if (sndbuf < SOCK_MIN_SNDBUF)
sndbuf = SOCK_MIN_SNDBUF;
pause_scan_worker();
mutex_lock(&sock_lock);
list_for_each_entry(usock, &usock_list, list) {
if (usock->sock)
usock->sock->sk->sk_sndbuf = sndbuf;
}
mutex_unlock(&sock_lock);
cont_scan_worker();
return ret;
}
static void free_templates(void);
static int destination_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
ret = proc_dostring(ctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (ret >= 0 && write) {
pause_scan_worker();
destination_removeall();
add_destinations(destination_buf);
free_templates();
cont_scan_worker();
}
return ret;
}
#ifdef ENABLE_AGGR
static int aggregation_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
if (debug > 1)
printk(KERN_INFO "aggregation_procctl (%d) %u %llu\n", write, (unsigned int)(*lenp), *fpos);
ret = proc_dostring(ctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (ret >= 0 && write)
add_aggregation(aggregation_buf);
return ret;
}
#endif
#ifdef ENABLE_PROMISC
static int promisc_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int newpromisc = promisc;
int ret;
ctl_table_no_const lctl = *ctl;
lctl.data = &newpromisc;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (ret < 0 || !write)
return ret;
return switch_promisc(newpromisc);
}
#endif
#ifdef ENABLE_SAMPLER
static int parse_sampler(char *ptr);
static int sampler_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
if (debug > 1)
printk(KERN_INFO "sampler_procctl (%d) %u %llu\n", write, (unsigned int)(*lenp), *fpos);
ret = proc_dostring(ctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (ret >= 0 && write) {
int cpu;
pause_scan_worker();
netflow_scan_and_export(AND_FLUSH);
/* paused for sampling_code reads to be consistent */
ret = parse_sampler(sampler_buf);
/* resend templates */
ts_sampler_last = 0;
/* zero stat */
atomic64_set(&flows_observed, 0);
atomic64_set(&flows_selected, 0);
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
st->pkts_selected = 0;
st->pkts_observed = 0;
}
cont_scan_worker();
}
return ret;
}
#endif
#ifdef SNMP_RULES
static int add_snmp_rules(char *ptr);
static int snmp_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
if (debug > 1)
printk(KERN_INFO "snmp_procctl (%d) %u %llu\n", write, (unsigned int)(*lenp), *fpos);
ret = proc_dostring(ctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (ret >= 0 && write)
return add_snmp_rules(snmp_rules_buf);
return ret;
}
#endif
static void clear_ipt_netflow_stat(void)
{
int cpu;
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
memset(st, 0, sizeof(*st));
st->metric = METRIC_DFL;
}
}
static int flush_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
int val = 0;
ctl_table_no_const lctl = *ctl;
lctl.data = &val;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (!write)
return ret;
if (val > 0) {
char *stat = "";
pause_scan_worker();
netflow_scan_and_export(AND_FLUSH);
if (val > 1) {
clear_ipt_netflow_stat();
stat = " (reset stat counters)";
}
printk(KERN_INFO "ipt_NETFLOW: forced flush%s.\n", stat);
cont_scan_worker();
}
return ret;
}
static int protocol_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
int ver = protocol;
ctl_table_no_const lctl = *ctl;
lctl.data = &ver;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (!write)
return ret;
switch (ver) {
case 5:
case 9:
case 10:
printk(KERN_INFO "ipt_NETFLOW: forced flush (protocol version change)\n");
pause_scan_worker();
netflow_scan_and_export(AND_FLUSH);
netflow_switch_version(ver);
cont_scan_worker();
break;
default:
return -EPERM;
}
return ret;
}
#ifdef CONFIG_NF_NAT_NEEDED
static void register_ct_events(void);
static void unregister_ct_events(void);
static int natevents_procctl(ctl_table *ctl, int write, BEFORE2632(struct file *filp,)
void __user *buffer, size_t *lenp, loff_t *fpos)
{
int ret;
int val = natevents;
ctl_table_no_const lctl = *ctl;
lctl.data = &val;
ret = proc_dointvec(&lctl, write, BEFORE2632(filp,) buffer, lenp, fpos);
if (!write)
return ret;
if (natevents && !val)
unregister_ct_events();
else if (!natevents && val)
register_ct_events();
return ret;
}
#endif
static struct ctl_table_header *netflow_sysctl_header;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
#define _CTL_NAME(x) .ctl_name = x,
static void ctl_table_renumber(ctl_table *table)
{
int c;
for (c = 1; table->procname; table++, c++)
table->ctl_name = c;
}
#else
#define _CTL_NAME(x)
#define ctl_table_renumber(x)
#endif
static ctl_table netflow_sysctl_table[] = {
{
.procname = "active_timeout",
.mode = 0644,
.data = &active_timeout,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
.procname = "inactive_timeout",
.mode = 0644,
.data = &inactive_timeout,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
.procname = "debug",
.mode = 0644,
.data = &debug,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
.procname = "hashsize",
.mode = 0644,
.data = &htable_size,
.maxlen = sizeof(int),
.proc_handler = &hsize_procctl,
},
{
.procname = "sndbuf",
.mode = 0644,
.maxlen = sizeof(int),
.proc_handler = &sndbuf_procctl,
},
{
.procname = "destination",
.mode = 0644,
.data = &destination_buf,
.maxlen = sizeof(destination_buf),
.proc_handler = &destination_procctl,
},
#ifdef ENABLE_AGGR
{
.procname = "aggregation",
.mode = 0644,
.data = &aggregation_buf,
.maxlen = sizeof(aggregation_buf),
.proc_handler = &aggregation_procctl,
},
#endif
{
.procname = "maxflows",
.mode = 0644,
.data = &maxflows,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
.procname = "flush",
.mode = 0644,
.maxlen = sizeof(int),
.proc_handler = &flush_procctl,
},
{
.procname = "protocol",
.mode = 0644,
.maxlen = sizeof(int),
.proc_handler = &protocol_procctl,
},
{
.procname = "refresh-rate",
.mode = 0644,
.data = &refresh_rate,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
{
.procname = "timeout-rate",
.mode = 0644,
.data = &timeout_rate,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec,
},
#ifdef ENABLE_PROMISC
{
.procname = "promisc",
.mode = 0644,
.data = &promisc,
.maxlen = sizeof(int),
.proc_handler = &promisc_procctl,
},
#endif
#ifdef ENABLE_SAMPLER
{
.procname = "sampler",
.mode = 0644,
.data = &sampler_buf,
.maxlen = sizeof(sampler_buf),
.proc_handler = &sampler_procctl,
},
#endif
{
.procname = "scan-min",
.mode = 0644,
.data = &scan_min,
.maxlen = sizeof(int),
.proc_handler = &proc_dointvec_minmax,
.extra1 = &one,
.extra2 = &scan_max,
},
#ifdef SNMP_RULES
{
.procname = "snmp-rules",
.mode = 0644,
.data = &snmp_rules_buf,
.maxlen = sizeof(snmp_rules_buf),
.proc_handler = &snmp_procctl,
},
#endif
#ifdef CONFIG_NF_NAT_NEEDED
{
.procname = "natevents",
.mode = 0644,
.maxlen = sizeof(int),
.proc_handler = &natevents_procctl,
},
#endif
{ }
};
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
static ctl_table netflow_sysctl_root[] = {
{
_CTL_NAME(33)
.procname = "netflow",
.mode = 0555,
.child = netflow_sysctl_table,
},
{ }
};
static ctl_table netflow_net_table[] = {
{
.ctl_name = CTL_NET,
.procname = "net",
.mode = 0555,
.child = netflow_sysctl_root,
},
{ }
};
#else /* >= 2.6.25 */
static struct ctl_path netflow_sysctl_path[] = {
{
.procname = "net",
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,33)
.ctl_name = CTL_NET
#endif
},
{ .procname = "netflow" },
{ }
};
#endif /* 2.6.25 */
#endif /* CONFIG_SYSCTL */
/* socket code */
static void sk_error_report(struct sock *sk)
{
struct ipt_netflow_sock *usock;
/* clear connection refused errors if any */
if (debug > 1)
printk(KERN_INFO "ipt_NETFLOW: socket error <%d>\n", sk->sk_err);
sk->sk_err = 0;
usock = sk->sk_user_data;
if (usock)
usock->err_cberr++;
NETFLOW_STAT_INC(sock_cberr);
/* It's theoretically possible to determine to which datagram this reply is,
* because ICMP message frequently includes header of erroneous packet, but
* this is not that reliable - packets could be spoofed, and requires keeping
* book of sent packets. */
return;
}
static struct socket *usock_open_sock(struct ipt_netflow_sock *usock)
{
struct socket *sock;
int error;
int salen = 0;
if ((error = sock_create_kern(usock->addr.ss_family, SOCK_DGRAM, IPPROTO_UDP, &sock)) < 0) {
printk(KERN_ERR "ipt_NETFLOW: sock_create_kern error %d\n", -error);
return NULL;
}
sock->sk->sk_allocation = GFP_ATOMIC;
sock->sk->sk_prot->unhash(sock->sk); /* hidden from input */
sock->sk->sk_error_report = &sk_error_report; /* clear ECONNREFUSED */
sock->sk->sk_user_data = usock;
sock->sk->sk_reuse = SK_CAN_REUSE;
if (usock->sdev[0]) {
struct net_device *dev = dev_get_by_name(&init_net, usock->sdev);
if (dev) {
sock->sk->sk_bound_dev_if = dev->ifindex;
dev_put(dev);
} else {
printk(KERN_ERR "ipt_NETFLOW: error binding to device %s, errno %d\n",
usock->sdev, -error);
return NULL;
}
}
if (!is_zero_addr(&usock->saddr)) {
if (usock->saddr.ss_family == AF_INET)
salen = sizeof(struct sockaddr_in);
else if (usock->saddr.ss_family == AF_INET6)
salen = sizeof(struct sockaddr_in6);
if ((error = sock->ops->bind(sock, (struct sockaddr *)&usock->saddr, salen)) < 0) {
printk(KERN_ERR "ipt_NETFLOW: error binding socket %d\n", -error);
return NULL;
}
}
if (sndbuf)
sock->sk->sk_sndbuf = sndbuf;
else
sndbuf = sock->sk->sk_sndbuf;
error = sock->ops->connect(sock, (struct sockaddr *)&usock->addr, sizeof(usock->addr), 0);
if (error < 0) {
printk(KERN_ERR "ipt_NETFLOW: error connecting UDP socket %d,"
" don't worry, will try reconnect later.\n", -error);
/* ENETUNREACH when no interfaces */
sock_release(sock);
return NULL;
}
return sock;
}
static void usock_connect(struct ipt_netflow_sock *usock, const int sendmsg)
{
usock->sock = usock_open_sock(usock);
if (usock->sock) {
if (sendmsg || debug)
printk(KERN_INFO "ipt_NETFLOW: connected %s\n",
print_sockaddr(&usock->addr));
} else {
usock->err_connect++;
if (debug)
printk(KERN_INFO "ipt_NETFLOW: connect to %s failed%s.\n",
print_sockaddr(&usock->addr),
(sendmsg)? " (pdu lost)" : "");
}
atomic_set(&usock->wmem_peak, 0);
usock->err_full = 0;
usock->err_other = 0;
}
static void usock_close(struct ipt_netflow_sock *usock)
{
if (usock->sock)
sock_release(usock->sock);
usock->sock = NULL;
}
ktime_t ktime_get_real(void);
// return numbers of sends succeded, 0 if none
/* only called in scan worker path */
static void netflow_sendmsg(void *buffer, const int len)
{
struct msghdr msg = { .msg_flags = MSG_DONTWAIT|MSG_NOSIGNAL };
struct kvec iov = { buffer, len };
int retok = 0, ret;
int snum = 0;
struct ipt_netflow_sock *usock;
mutex_lock(&sock_lock);
list_for_each_entry(usock, &usock_list, list) {
usock->pkt_exp++;
usock->bytes_exp += len;
if (!usock->sock)
usock_connect(usock, 1);
if (!usock->sock) {
NETFLOW_STAT_INC(send_failed);
usock->pkt_fail++;
continue;
}
if (debug)
printk(KERN_INFO "netflow_sendmsg: sendmsg(%d, %d) [%u %u]\n",
snum,
len,
compat_refcount_read(&usock->sock->sk->sk_wmem_alloc),
usock->sock->sk->sk_sndbuf);
ret = kernel_sendmsg(usock->sock, &msg, &iov, 1, (size_t)len);
if (ret < 0) {
char *suggestion = "";
NETFLOW_STAT_INC(send_failed);
usock->pkt_fail++;
if (ret == -EAGAIN) {
usock->err_full++;
suggestion = ": increase sndbuf!";
} else {
usock->err_other++;
if (ret == -ENETUNREACH) {
suggestion = ": network is unreachable.";
} else if (ret == -EINVAL) {
usock_close(usock);
suggestion = ": will reconnect.";
}
}
printk(KERN_ERR "ipt_NETFLOW: sendmsg[%d] error %d: data loss %llu pkt, %llu bytes%s\n",
snum, ret, pdu_packets, pdu_traf, suggestion);
} else {
unsigned int wmem = compat_refcount_read(&usock->sock->sk->sk_wmem_alloc);
if (wmem > atomic_read(&usock->wmem_peak))
atomic_set(&usock->wmem_peak, wmem);
NETFLOW_STAT_INC(exported_pkt);
NETFLOW_STAT_ADD(exported_traf, ret);
usock->pkt_sent++;
retok++;
}
snum++;
}
mutex_unlock(&sock_lock);
if (retok == 0) {
/* not least one send succeded, account stat for dropped packets */
NETFLOW_STAT_ADD(pkt_lost, pdu_packets);
NETFLOW_STAT_ADD(traf_lost, pdu_traf);
NETFLOW_STAT_ADD(flow_lost, pdu_flow_records);
NETFLOW_STAT_TS(lost);
} else {
NETFLOW_STAT_ADD(exported_flow, pdu_flow_records);
}
}
static void usock_close_free(struct ipt_netflow_sock *usock)
{
printk(KERN_INFO "ipt_NETFLOW: removed destination %s\n",
print_sockaddr(&usock->addr));
usock_close(usock);
vfree(usock);
}
static void destination_removeall(void)
{
mutex_lock(&sock_lock);
while (!list_empty(&usock_list)) {
struct ipt_netflow_sock *usock;
usock = list_entry(usock_list.next, struct ipt_netflow_sock, list);
list_del(&usock->list);
mutex_unlock(&sock_lock);
usock_close_free(usock);
mutex_lock(&sock_lock);
}
mutex_unlock(&sock_lock);
}
static void add_usock(struct ipt_netflow_sock *usock)
{
struct ipt_netflow_sock *sk;
mutex_lock(&sock_lock);
/* don't need duplicated sockets */
list_for_each_entry(sk, &usock_list, list) {
if (sockaddr_cmp(&sk->addr, &usock->addr)) {
mutex_unlock(&sock_lock);
usock_close_free(usock);
return;
}
}
list_add_tail(&usock->list, &usock_list);
printk(KERN_INFO "ipt_NETFLOW: added destination %s%s\n",
print_usock_addr(usock),
(!usock->sock)? " (unconnected)" : "");
mutex_unlock(&sock_lock);
}
#if defined(ENABLE_SAMPLER) || defined(SNMP_RULES)
static inline int xisdigit(int ch)
{
return (ch >= '0') && (ch <= '9');
}
static inline int simple_atoi(const char *p)
{
int i;
for (i = 0; xisdigit(*p); p++)
i = i * 10 + *p - '0';
return i;
}
#endif
#ifdef ENABLE_SAMPLER
static void set_sampler(const unsigned char mode, const unsigned short interval)
{
struct sampling s;
s.mode = mode;
s.interval = interval;
if (!mode || interval > SAMPLER_INTERVAL_M) {
*sampler_buf = 0;
samp.v32 = s.v32;
printk(KERN_ERR "ipt_NETFLOW: flow sampling is disabled.\n");
} else {
sampling_ts.first = ktime_get_real();
/* no race here, becasue exporting process is stopped */
samp.v32 = s.v32;
sprintf(sampler_buf, "%s:%u", sampler_mode_string(), interval);
printk(KERN_ERR "ipt_NETFLOW: flow sampling is enabled, mode %s one-out-of %u.\n",
sampler_mode_string(), interval);
}
}
static int parse_sampler(char *ptr)
{
char *p;
unsigned char mode;
unsigned int val;
int ret = 0;
switch (tolower(*ptr)) {
case 'd': mode = SAMPLER_DETERMINISTIC; break;
case 'r': mode = SAMPLER_RANDOM; break;
#ifdef SAMPLING_HASH
case 'h': mode = SAMPLER_HASH; break;
#endif
default:
printk(KERN_ERR "ipt_NETFLOW: sampler parse error (%s '%s').\n",
"unknown mode", ptr);
ret = -EINVAL;
/* FALLTHROUGH */
case '\0': /* empty */
case 'n': /* none */
case 'o': /* off */
case '0': /* zero */
set_sampler(0, 0);
return ret;
}
p = strchr(ptr, ':');
if (!p) {
printk(KERN_ERR "ipt_NETFLOW: sampler parse error (%s '%s').\n",
"no interval specified", ptr);
set_sampler(0, 0);
return -EINVAL;
}
val = simple_atoi(++p);
if (val < 2 || val > SAMPLER_INTERVAL_M) {
printk(KERN_ERR "ipt_NETFLOW: sampler parse error (%s '%s').\n",
"illegal interval", p);
set_sampler(0, 0);
return -EINVAL;
}
set_sampler(mode, val);
return 0;
}
#endif
#ifdef SNMP_RULES
/* source string: eth:100,ppp:200,vlan:300 */
/* reformat to: length[1], prefix[len], offset[2], ..., null[1]. */
static int parse_snmp_rules(char *ptr, unsigned char *dst)
{
int osize = 0;
while (*ptr) {
char *prefix = ptr;
unsigned int number;
int len, lsize;
char *p;
p = strchr(ptr, ':');
if (!p)
return -EINVAL;
len = p - ptr;
if (len == 0)
return -EINVAL;
ptr += len;
if (sscanf(ptr, ":%d%n", &number, &lsize) < 1)
return -EINVAL;
ptr += lsize;
if (*ptr) /* any separator will work */
ptr++;
osize += 1 + len + 2;
if (dst) {
*dst++ = len;
memcpy(dst, prefix, len);
dst += len;
*dst++ = (number >> 8) & 0xff;
*dst++ = number & 0xff;
}
}
osize += 1;
if (dst)
*dst = '\0';
return osize;
}
static int add_snmp_rules(char *ptr)
{
int osize = parse_snmp_rules(ptr, NULL);
char *dst;
char *old;
if (osize <= 0) {
printk(KERN_ERR "ipt_NETFLOW: add_snmp_rules parse error.\n");
strcpy(snmp_rules_buf, "parse error");
return -EINVAL;
}
dst = kmalloc(osize, GFP_KERNEL);
if (!dst) {
strcpy(snmp_rules_buf, "no memory");
printk(KERN_ERR "ipt_NETFLOW: add_snmp_rules no memory.\n");
return -ENOMEM;
}
parse_snmp_rules(ptr, dst);
spin_lock(&snmp_lock);
old = snmp_ruleset;
rcu_assign_pointer(snmp_ruleset, dst);
spin_unlock(&snmp_lock);
synchronize_rcu();
if (old)
kfree(old);
return 0;
}
static inline int resolve_snmp(const struct net_device *ifc)
{
const unsigned char *rules;
if (!ifc)
return -1;
rules = rcu_dereference(snmp_ruleset);
if (!rules)
return ifc->ifindex;
while (*rules) {
const unsigned int len = *rules++;
const char *ifname = ifc->name;
if (!strncmp(ifname, rules, len)) {
rules += len;
return (rules[0] << 8) + rules[1] +
simple_atoi(ifname + len);
}
rules += len + 2;
}
return ifc->ifindex;
}
#endif /* SNMP_RULES */
/* count how much character c is in the string */
static size_t strncount(const char *s, size_t count, int c)
{
size_t amount = 0;
for (; count-- && *s != '\0'; ++s)
if (*s == (char)c)
++amount;
return amount;
}
#define SEPARATORS " ,;\t\n"
static int add_destinations(const char *ptr)
{
int len;
for (; ptr; ptr += len) {
struct sockaddr_storage ss;
struct sockaddr_storage sbind = {};
struct ipt_netflow_sock *usock;
const char *end;
int succ = 0;
char name[IFNAMSIZ] = { 0 };
/* skip initial separators */
ptr += strspn(ptr, SEPARATORS);
len = strcspn(ptr, SEPARATORS);
if (!len)
break;
memset(&ss, 0, sizeof(ss));
if (strncount(ptr, len, ':') >= 2) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss;
struct sockaddr_in6 *sout = (struct sockaddr_in6 *)&sbind;
const char *c = ptr;
int clen = len;
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(2055);
if (*c == '[') {
++c;
--clen;
}
succ = in6_pton(c, clen, (u8 *)&sin6->sin6_addr, -1, &end);
if (succ && *ptr == '[' && *end == ']')
++end;
if (succ &&
(*end == ':' || *end == '.' || *end == 'p' || *end == '#'))
sin6->sin6_port = htons(simple_strtoul(++end, (char **)&end, 0));
if (succ && *end == '@') {
++end;
sout->sin6_family = AF_INET6;
sout->sin6_port = 0;
succ = in6_pton(end, strcspn(end, SEPARATORS), (u8 *)&sout->sin6_addr, -1, &end);
}
} else {
struct sockaddr_in *sin = (struct sockaddr_in *)&ss;
struct sockaddr_in *sout = (struct sockaddr_in *)&sbind;
sin->sin_family = AF_INET;
sin->sin_port = htons(2055);
succ = in4_pton(ptr, len, (u8 *)&sin->sin_addr, -1, &end);
if (succ && *end == ':')
sin->sin_port = htons(simple_strtoul(++end, (char **)&end, 0));
if (succ && *end == '@') {
++end;
sout->sin_family = AF_INET;
sout->sin_port = 0;
succ = in4_pton(end, strcspn(end, SEPARATORS), (u8 *)&sout->sin_addr, -1, &end);
}
}
if (succ && *end == '%') {
++end;
snprintf(name, sizeof(name), "%.*s", (int)strcspn(end, SEPARATORS), end);
}
if (!succ) {
printk(KERN_ERR "ipt_NETFLOW: can't parse destination: %.*s\n",
len, ptr);
continue;
}
if (!(usock = vmalloc(sizeof(*usock)))) {
printk(KERN_ERR "ipt_NETFLOW: can't vmalloc socket\n");
return -ENOMEM;
}
memset(usock, 0, sizeof(*usock));
usock->addr = ss;
usock->saddr = sbind;
memcpy(usock->sdev, name, sizeof(usock->sdev));
usock_connect(usock, 0);
add_usock(usock);
}
return 0;
}
#ifdef ENABLE_AGGR
static void aggregation_remove(struct list_head *list)
{
write_lock_bh(&aggr_lock);
while (!list_empty(list)) {
struct netflow_aggr_n *aggr; /* match netflow_aggr_p too */
aggr = list_entry(list->next, struct netflow_aggr_n, list);
list_del(&aggr->list);
write_unlock_bh(&aggr_lock);
vfree(aggr);
write_lock_bh(&aggr_lock);
}
write_unlock_bh(&aggr_lock);
}
static int add_aggregation(char *ptr)
{
struct netflow_aggr_n *aggr_n, *aggr, *tmp;
struct netflow_aggr_p *aggr_p;
LIST_HEAD(new_aggr_n_list);
LIST_HEAD(new_aggr_p_list);
LIST_HEAD(old_aggr_list);
while (ptr && *ptr) {
unsigned char ip[4];
unsigned int mask;
unsigned int port1, port2;
unsigned int aggr_to;
ptr += strspn(ptr, SEPARATORS);
if (sscanf(ptr, "%hhu.%hhu.%hhu.%hhu/%u=%u",
ip, ip + 1, ip + 2, ip + 3, &mask, &aggr_to) == 6) {
if (!(aggr_n = vmalloc(sizeof(*aggr_n)))) {
printk(KERN_ERR "ipt_NETFLOW: can't vmalloc aggr\n");
return -ENOMEM;
}
memset(aggr_n, 0, sizeof(*aggr_n));
aggr_n->mask = bits2mask(mask);
aggr_n->addr = ntohl(*(__be32 *)ip) & aggr_n->mask;
aggr_n->aggr_mask = bits2mask(aggr_to);
aggr_n->prefix = mask;
printk(KERN_INFO "ipt_NETFLOW: add aggregation [%u.%u.%u.%u/%u=%u]\n",
HIPQUAD(aggr_n->addr), mask, aggr_to);
list_add_tail(&aggr_n->list, &new_aggr_n_list);
} else if (sscanf(ptr, "%u-%u=%u", &port1, &port2, &aggr_to) == 3 ||
sscanf(ptr, "%u=%u", &port2, &aggr_to) == 2) {
if (!(aggr_p = vmalloc(sizeof(*aggr_p)))) {
printk(KERN_ERR "ipt_NETFLOW: can't vmalloc aggr\n");
return -ENOMEM;
}
memset(aggr_p, 0, sizeof(*aggr_p));
aggr_p->port1 = port1;
aggr_p->port2 = port2;
aggr_p->aggr_port = aggr_to;
printk(KERN_INFO "ipt_NETFLOW: add aggregation [%u-%u=%u]\n",
port1, port2, aggr_to);
list_add_tail(&aggr_p->list, &new_aggr_p_list);
} else {
printk(KERN_ERR "ipt_NETFLOW: bad aggregation rule: %s (ignoring)\n", ptr);
break;
}
ptr = strpbrk(ptr, SEPARATORS);
}
/* swap lists */
write_lock_bh(&aggr_lock);
list_for_each_entry_safe(aggr, tmp, &aggr_n_list, list)
list_move(&aggr->list, &old_aggr_list);
list_for_each_entry_safe(aggr, tmp, &aggr_p_list, list)
list_move(&aggr->list, &old_aggr_list);
list_for_each_entry_safe(aggr, tmp, &new_aggr_n_list, list)
list_move_tail(&aggr->list, &aggr_n_list);
list_for_each_entry_safe(aggr, tmp, &new_aggr_p_list, list)
list_move_tail(&aggr->list, &aggr_p_list);
write_unlock_bh(&aggr_lock);
aggregation_remove(&old_aggr_list);
return 0;
}
#endif
#ifdef SAMPLING_HASH
static uint32_t hash_seed;
#define HASH_SEED hash_seed
#else
#define HASH_SEED 0
#endif
static inline u_int32_t __hash_netflow(const struct ipt_netflow_tuple *tuple)
{
return murmur3(tuple, sizeof(struct ipt_netflow_tuple), HASH_SEED);
}
static inline u_int32_t hash_netflow(const struct ipt_netflow_tuple *tuple)
{
return __hash_netflow(tuple) % htable_size;
}
static struct ipt_netflow *
ipt_netflow_find(const struct ipt_netflow_tuple *tuple, const unsigned int hash)
{
struct ipt_netflow *nf;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
struct hlist_node *pos;
#endif
compat_hlist_for_each_entry(nf, pos, &htable[hash], hlist) {
if (ipt_netflow_tuple_equal(tuple, &nf->tuple) &&
nf->nr_bytes < FLOW_FULL_WATERMARK) {
NETFLOW_STAT_INC(found);
return nf;
}
NETFLOW_STAT_INC(searched);
}
NETFLOW_STAT_INC(notfound);
return NULL;
}
static struct hlist_head *alloc_hashtable(const int size)
{
struct hlist_head *hash;
hash = vmalloc(sizeof(struct hlist_head) * size);
if (hash) {
int i;
for (i = 0; i < size; i++)
INIT_HLIST_HEAD(&hash[i]);
} else
printk(KERN_ERR "ipt_NETFLOW: unable to vmalloc hash table.\n");
return hash;
}
static int set_hashsize(int new_size)
{
struct hlist_head *new_hash, *old_hash;
struct ipt_netflow *nf, *tmp;
LIST_HEAD(all_list);
int i;
if (new_size < LOCK_COUNT)
new_size = LOCK_COUNT;
printk(KERN_INFO "ipt_NETFLOW: allocating new hash table %u -> %u buckets\n",
htable_size, new_size);
new_hash = alloc_hashtable(new_size);
if (!new_hash)
return -ENOMEM;
/* rehash */
write_lock_bh(&htable_rwlock);
old_hash = htable;
htable = new_hash;
htable_size = new_size;
for (i = 0; i < LOCK_COUNT; i++) {
struct stripe_entry *stripe = &htable_stripes[i];
spin_lock(&stripe->lock);
list_splice_init(&stripe->list, &all_list);
spin_unlock(&stripe->lock);
}
list_for_each_entry_safe(nf, tmp, &all_list, flows_list) {
unsigned int hash;
struct stripe_entry *stripe;
hash = hash_netflow(&nf->tuple);
stripe = &htable_stripes[hash & LOCK_COUNT_MASK];
spin_lock(&stripe->lock);
list_move_tail(&nf->flows_list, &stripe->list);
hlist_add_head(&nf->hlist, &htable[hash]);
spin_unlock(&stripe->lock);
}
write_unlock_bh(&htable_rwlock);
vfree(old_hash);
return 0;
}
static struct ipt_netflow *
ipt_netflow_alloc(const struct ipt_netflow_tuple *tuple)
{
struct ipt_netflow *nf;
long count;
nf = kmem_cache_alloc(ipt_netflow_cachep, GFP_ATOMIC);
if (!nf) {
printk(KERN_ERR "ipt_NETFLOW: Can't allocate flow.\n");
return NULL;
}
memset(nf, 0, sizeof(*nf));
nf->tuple = *tuple;
count = atomic_inc_return(&ipt_netflow_count);
if (count > peakflows) {
peakflows = count;
peakflows_at = jiffies;
}
return nf;
}
static void ipt_netflow_free(struct ipt_netflow *nf)
{
if (IS_DUMMY_FLOW(nf))
return;
atomic_dec(&ipt_netflow_count);
kmem_cache_free(ipt_netflow_cachep, nf);
}
/* cook pdu, send, and clean */
/* only called in scan worker path */
static void netflow_export_pdu_v5(void)
{
struct timeval tv;
int pdusize;
if (!pdu_data_records)
return;
if (debug > 1)
printk(KERN_INFO "netflow_export_pdu_v5 with %d records\n", pdu_data_records);
pdu.v5.version = htons(5);
pdu.v5.nr_records = htons(pdu_data_records);
pdu.v5.ts_uptime = htonl(jiffies_to_msecs(jiffies));
do_gettimeofday(&tv);
pdu.v5.ts_usecs = htonl(tv.tv_sec);
pdu.v5.ts_unsecs = htonl(tv.tv_usec);
pdu.v5.seq = htonl(pdu_seq);
//pdu.v5.eng_type = 0;
pdu.v5.eng_id = (__u8)engine_id;
#ifdef ENABLE_SAMPLER
pdu.v5.sampling = htons(sampler_nf_v5());
#endif
pdusize = NETFLOW5_HEADER_SIZE + sizeof(struct netflow5_record) * pdu_data_records;
netflow_sendmsg(&pdu.v5, pdusize);
pdu_packets = 0;
pdu_traf = 0;
pdu_seq += pdu_data_records;
pdu_count++;
pdu_flow_records = pdu_data_records = 0;
}
/* only called in scan worker path */
static void netflow_export_flow_v5(struct ipt_netflow *nf)
{
struct netflow5_record *rec;
if (unlikely(debug > 2))
printk(KERN_INFO "adding flow to export (%d)\n", pdu_data_records);
pdu_packets += nf->nr_packets;
pdu_traf += nf->nr_bytes;
pdu_ts_mod = jiffies;
rec = &pdu.v5.flow[pdu_data_records++];
pdu_flow_records++;
/* make V5 flow record */
rec->s_addr = nf->tuple.src.ip;
rec->d_addr = nf->tuple.dst.ip;
rec->nexthop = nf->nh.ip;
#ifdef SNMP_RULES
rec->i_ifc = htons(nf->i_ifcr);
rec->o_ifc = htons(nf->o_ifcr);
#else
rec->i_ifc = htons(nf->tuple.i_ifc);
rec->o_ifc = htons(nf->o_ifc);
#endif
rec->nr_packets = htonl(nf->nr_packets);
rec->nr_octets = htonl(nf->nr_bytes);
rec->first_ms = htonl(jiffies_to_msecs(nf->nf_ts_first));
rec->last_ms = htonl(jiffies_to_msecs(nf->nf_ts_last));
rec->s_port = nf->tuple.s_port;
rec->d_port = nf->tuple.d_port;
//rec->reserved = 0; /* pdu is always zeroized for v5 in netflow_switch_version */
rec->tcp_flags = nf->tcp_flags;
rec->protocol = nf->tuple.protocol;
rec->tos = nf->tuple.tos;
#ifdef CONFIG_NF_NAT_NEEDED
rec->s_as = nf->s_as;
rec->d_as = nf->d_as;
#endif
rec->s_mask = nf->s_mask;
rec->d_mask = nf->d_mask;
//rec->padding = 0;
ipt_netflow_free(nf);
if (pdu_data_records == NETFLOW5_RECORDS_MAX)
netflow_export_pdu_v5();
}
/* pdu is initially blank, export current pdu, and prepare next for filling. */
static void netflow_export_pdu_v9(void)
{
struct timeval tv;
int pdusize;
if (pdu_data_used <= pdu.v9.data)
return;
if (debug > 1)
printk(KERN_INFO "netflow_export_pdu_v9 with %d records\n",
pdu_data_records + pdu_tpl_records);
pdu.v9.version = htons(9);
pdu.v9.nr_records = htons(pdu_data_records + pdu_tpl_records);
pdu.v9.sys_uptime_ms = htonl(jiffies_to_msecs(jiffies));
do_gettimeofday(&tv);
pdu.v9.export_time_s = htonl(tv.tv_sec);
pdu.v9.seq = htonl(pdu_seq);
pdu.v9.source_id = htonl(engine_id);
pdusize = pdu_data_used - (unsigned char *)&pdu.v9;
netflow_sendmsg(&pdu.v9, pdusize);
pdu_packets = 0;
pdu_traf = 0;
pdu_seq++;
pdu_count++;
pdu_flow_records = pdu_data_records = pdu_tpl_records = 0;
pdu_data_used = pdu.v9.data;
pdu_flowset = NULL;
}
static void netflow_export_pdu_ipfix(void)
{
struct timeval tv;
int pdusize;
if (pdu_data_used <= pdu.ipfix.data)
return;
if (debug > 1)
printk(KERN_INFO "netflow_export_pduX with %d records\n",
pdu_data_records);
pdu.ipfix.version = htons(10);
do_gettimeofday(&tv);
pdu.ipfix.export_time_s = htonl(tv.tv_sec);
pdu.ipfix.seq = htonl(pdu_seq);
pdu.ipfix.odomain_id = htonl(engine_id);
pdusize = pdu_data_used - (unsigned char *)&pdu;
pdu.ipfix.length = htons(pdusize);
netflow_sendmsg(&pdu.ipfix, pdusize);
pdu_packets = 0;
pdu_traf = 0;
pdu_seq += pdu_data_records;
pdu_count++;
pdu_flow_records = pdu_data_records = pdu_tpl_records = 0;
pdu_data_used = pdu.ipfix.data;
pdu_flowset = NULL;
}
static inline int pdu_have_space(const size_t size)
{
return ((pdu_data_used + size) <= pdu_high_wm);
}
static inline unsigned char *pdu_grab_space(const size_t size)
{
unsigned char *ptr = pdu_data_used;
pdu_data_used += size;
return ptr;
}
static inline void pdu_rewind_space(const size_t size)
{
pdu_data_used -= size;
}
/* allocate data space in pdu, or export (reallocate) and fail. */
static inline unsigned char *pdu_alloc_fail_export(const size_t size)
{
if (unlikely(!pdu_have_space(size))) {
netflow_export_pdu();
return NULL;
}
return pdu_grab_space(size);
}
/* doesn't fail, but can provide empty pdu. */
static unsigned char *pdu_alloc_export(const size_t size)
{
return pdu_alloc_fail_export(size) ?: pdu_grab_space(size);
}
/* global table of sizes of template field types */
#define two(id, a, b, len) [id] = len,
#define one(id, a, len) [id] = len,
static u_int8_t tpl_element_sizes[] = {
Elements
};
#undef two
#undef one
#define TEMPLATES_HASH_BSIZE 8
#define TEMPLATES_HASH_SIZE (1<<TEMPLATES_HASH_BSIZE)
static struct hlist_head templates_hash[TEMPLATES_HASH_SIZE];
struct base_template {
int length; /* number of elements in template */
u_int16_t types[]; /* {type, size} pairs */
};
/* Data Templates */
#define BTPL_BASE9 0x00000001 /* netflow base stat */
#define BTPL_BASEIPFIX 0x00000002 /* ipfix base stat */
#define BTPL_IP4 0x00000004 /* IPv4 */
#define BTPL_MASK4 0x00000008 /* Aggregated */
#define BTPL_PORTS 0x00000010 /* UDP&TCP */
#define BTPL_IP6 0x00000020 /* IPv6 */
#define BTPL_ICMP9 0x00000040 /* ICMP (for V9) */
#define BTPL_ICMPX4 0x00000080 /* ICMP IPv4 (for IPFIX) */
#define BTPL_ICMPX6 0x00000100 /* ICMP IPv6 (for IPFIX) */
#define BTPL_IGMP 0x00000200 /* IGMP */
#define BTPL_IPSEC 0x00000400 /* AH&ESP */
#define BTPL_NAT4 0x00000800 /* NAT IPv4 */
#define BTPL_LABEL6 0x00001000 /* IPv6 flow label */
#define BTPL_IP4OPTIONS 0x00002000 /* IPv4 Options */
#define BTPL_IP6OPTIONS 0x00004000 /* IPv6 Options */
#define BTPL_TCPOPTIONS 0x00008000 /* TCP Options */
#define BTPL_MAC 0x00010000 /* MAC addresses */
#define BTPL_VLAN9 0x00020000 /* outer VLAN for v9 */
#define BTPL_VLANX 0x00040000 /* outer VLAN for IPFIX */
#define BTPL_VLANI 0x00080000 /* inner VLAN (IPFIX) */
#define BTPL_ETHERTYPE 0x00100000 /* ethernetType */
#define BTPL_DIRECTION 0x00200000 /* flowDirection */
#define BTPL_SAMPLERID 0x00400000 /* samplerId (v9) */
#define BTPL_SELECTORID 0x00800000 /* selectorId (IPFIX) */
#define BTPL_MPLS 0x01000000 /* MPLS stack */
#define BTPL_OPTION 0x80000000 /* Options Template */
#define BTPL_MAX 32
/* Options Templates */
#define OTPL(x) (BTPL_OPTION | x)
#define OTPL_SYSITIME OTPL(1) /* systemInitTimeMilliseconds */
#define OTPL_MPSTAT OTPL(2) /* The Metering Process Statistics (rfc5101) */
#define OTPL_MPRSTAT OTPL(3) /* The Metering Process Reliability Statistics */
#define OTPL_EPRSTAT OTPL(4) /* The Exporting Process Reliability Statistics */
#define OTPL_SAMPLER OTPL(5) /* Flow Sampler for v9 */
#define OTPL_SEL_RAND OTPL(6) /* Random Flow Selector for IPFIX */
#define OTPL_SEL_COUNT OTPL(7) /* Systematic count-based Flow Selector for IPFIX */
#define OTPL_SEL_STAT OTPL(8) /* rfc7014 */
#define OTPL_SEL_STATH OTPL(9) /* OTPL_SEL_STAT, except selectorIDTotalFlowsObserved */
#define OTPL_IFNAMES OTPL(10)
static struct base_template template_base_9 = {
.types = {
INPUT_SNMP,
OUTPUT_SNMP,
#ifdef ENABLE_PHYSDEV
ingressPhysicalInterface,
egressPhysicalInterface,
#endif
IN_PKTS,
IN_BYTES,
FIRST_SWITCHED,
LAST_SWITCHED,
PROTOCOL,
TOS,
0
}
};
static struct base_template template_base_ipfix = {
.types = {
ingressInterface,
egressInterface,
#ifdef ENABLE_PHYSDEV
ingressPhysicalInterface,
egressPhysicalInterface,
#endif
packetDeltaCount,
octetDeltaCount,
flowStartMilliseconds,
flowEndMilliseconds,
protocolIdentifier,
ipClassOfService,
flowEndReason,
0
}
};
#ifdef ENABLE_MAC
static struct base_template template_mac_ipfix = {
.types = {
destinationMacAddress,
sourceMacAddress,
0
}
};
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
static struct base_template template_ethertype = {
.types = { ethernetType, 0 }
};
#endif
#ifdef ENABLE_VLAN
static struct base_template template_vlan_v9 = {
.types = { SRC_VLAN, 0 }
};
/* IPFIX is different from v9, see rfc7133. */
static struct base_template template_vlan_ipfix = {
.types = {
dot1qVlanId,
dot1qPriority,
0
}
};
static struct base_template template_vlan_inner = {
.types = {
dot1qCustomerVlanId,
dot1qCustomerPriority,
0
}
};
#endif
#ifdef MPLS_DEPTH
static struct base_template template_mpls = {
.types = {
mplsTopLabelTTL,
/* do not just add element here, becasue this array
* is truncated in ipt_netflow_init() */
#define MPLS_LABELS_BASE_INDEX 1
MPLS_LABEL_1,
MPLS_LABEL_2,
MPLS_LABEL_3,
MPLS_LABEL_4,
MPLS_LABEL_5,
MPLS_LABEL_6,
MPLS_LABEL_7,
MPLS_LABEL_8,
MPLS_LABEL_9,
MPLS_LABEL_10,
0
}
};
#endif
#ifdef ENABLE_DIRECTION
static struct base_template template_direction = {
.types = { DIRECTION, 0 }
};
#endif
static struct base_template template_ipv4 = {
.types = {
IPV4_SRC_ADDR,
IPV4_DST_ADDR,
IPV4_NEXT_HOP,
0
}
};
static struct base_template template_options4 = {
.types = { ipv4Options, 0 }
};
static struct base_template template_tcpoptions = {
.types = { tcpOptions, 0 }
};
static struct base_template template_ipv6 = {
.types = {
IPV6_SRC_ADDR,
IPV6_DST_ADDR,
IPV6_NEXT_HOP,
0
}
};
static struct base_template template_options6 = {
.types = { IPV6_OPTION_HEADERS, 0 }
};
static struct base_template template_label6 = {
.types = { IPV6_FLOW_LABEL, 0 }
};
static struct base_template template_ipv4_mask = {
.types = {
SRC_MASK,
DST_MASK,
0
}
};
static struct base_template template_ports = {
.types = {
L4_SRC_PORT,
L4_DST_PORT,
TCP_FLAGS,
0
}
};
static struct base_template template_icmp_v9 = {
.types = {
L4_SRC_PORT, /* dummy (required by some collector(s) to
recognize ICMP flows) */
L4_DST_PORT, /* actually used in V9 world instead of
ICMP_TYPE(32), disregarding docs */
0
}
};
static struct base_template template_icmp_ipv4 = {
.types = { icmpTypeCodeIPv4, 0 }
};
static struct base_template template_icmp_ipv6 = {
.types = { icmpTypeCodeIPv6, 0 }
};
static struct base_template template_igmp = {
.types = { MUL_IGMP_TYPE, 0 }
};
static struct base_template template_ipsec = {
.types = { IPSecSPI, 0 }
};
static struct base_template template_nat4 = {
.types = {
observationTimeMilliseconds,
IPV4_SRC_ADDR,
IPV4_DST_ADDR,
postNATSourceIPv4Address,
postNATDestinationIPv4Address,
L4_SRC_PORT,
L4_DST_PORT,
postNAPTSourceTransportPort,
postNAPTDestinationTransportPort,
PROTOCOL,
natEvent,
0
}
};
static struct base_template template_sys_init_time = {
.types = {
observationDomainId,
/* ipfix does not report sys_uptime_ms like v9 does,
* so this could be useful to detect system restart
* (rfc5102), and conversion of flow times to absolute
* time (rfc5153 4.7) */
systemInitTimeMilliseconds,
/* this will let collector detect module version and
* recompilation (by srcversion) */
observationDomainName,
/* useful to detect module reload */
flowStartMilliseconds,
flowEndMilliseconds,
0
}
};
/* http://tools.ietf.org/html/rfc5101#section-4 */
/* The Metering Process Statistics Option Template */
static struct base_template template_meter_stat = {
.types = {
observationDomainId,
exportedMessageTotalCount,
exportedFlowRecordTotalCount,
exportedOctetTotalCount,
observedFlowTotalCount,
0
}
};
/* The Metering Process Reliability Statistics Option Template */
static struct base_template template_meter_rel_stat = {
.types = {
observationDomainId,
ignoredPacketTotalCount,
ignoredOctetTotalCount,
flowStartMilliseconds, /* sampling start time */
flowEndMilliseconds,
0
}
};
/* The Exporting Process Reliability Statistics Option Template */
static struct base_template template_exp_rel_stat = {
.types = {
exportingProcessId,
notSentFlowTotalCount,
notSentPacketTotalCount,
notSentOctetTotalCount,
flowStartMilliseconds, /* sampling start time */
flowEndMilliseconds,
0
}
};
#ifdef ENABLE_SAMPLER
static struct base_template template_samplerid = {
.types = { FLOW_SAMPLER_ID, 0 }
};
static struct base_template template_selectorid = {
.types = { selectorId, 0 }
};
/* sampler for v9 */
static struct base_template template_sampler = {
.types = {
observationDomainId,
FLOW_SAMPLER_ID,
FLOW_SAMPLER_MODE,
FLOW_SAMPLER_RANDOM_INTERVAL,
0
}
};
/* sampler for ipfix */
static struct base_template template_selector_systematic = {
.types = {
observationDomainId,
selectorId,
flowSelectorAlgorithm,
samplingFlowInterval,
samplingFlowSpacing,
0
}
};
static struct base_template template_selector_random = {
.types = {
observationDomainId,
selectorId,
flowSelectorAlgorithm,
samplingSize,
samplingPopulation,
0
}
};
static struct base_template template_selector_stat = {
.types = {
selectorId,
selectorIDTotalFlowsObserved,
selectorIDTotalFlowsSelected,
selectorIdTotalPktsObserved,
selectorIdTotalPktsSelected,
flowStartMilliseconds,
flowEndMilliseconds,
0
}
};
/* can't calc selectorIDTotalFlowsObserved for hash sampling,
* because dropped flows are not accounted */
static struct base_template template_selector_stat_hash = {
.types = {
selectorId,
selectorIDTotalFlowsSelected,
selectorIdTotalPktsObserved,
selectorIdTotalPktsSelected,
flowStartMilliseconds,
flowEndMilliseconds,
0
}
};
#endif
static struct base_template template_interfaces = {
.types = {
observationDomainId,
INPUT_SNMP,
IF_NAME,
IF_DESC,
0
}
};
struct data_template {
struct hlist_node hlist;
unsigned int tpl_key;
char options; /* is it Options Template */
short length; /* number of elements in template */
short tpl_size; /* whole size of template itself (with header), for alloc */
short rec_size; /* size of one template record (w/o header) */
int template_id_n; /* uassigned from template_ids, network order. */
int exported_cnt;
unsigned long exported_ts; /* last exported (jiffies) */
u_int16_t fields[]; /* {type, size} pairs */
} __attribute__ ((packed));
#define TPL_FIELD_NSIZE 4 /* one complete template field's network size */
static void free_templates(void)
{
int i;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
struct hlist_node *pos;
#endif
struct hlist_node *tmp;
for (i = 0; i < TEMPLATES_HASH_SIZE; i++) {
struct hlist_head *thead = &templates_hash[i];
struct data_template *tpl;
compat_hlist_for_each_entry_safe(tpl, pos, tmp, thead, hlist)
kfree(tpl);
INIT_HLIST_HEAD(thead);
}
tpl_count = 0;
/* reinitialize template timeouts */
ts_sysinf_last = ts_stat_last = 0;
#ifdef ENABLE_SAMPLER
ts_sampler_last = 0;
#endif
}
/* find old, or create new combined template from template key (tmask) */
static struct data_template *get_template(const unsigned int tmask)
{
struct base_template *tlist[BTPL_MAX];
struct data_template *tpl;
int tnum;
int length;
int i, j, k;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
struct hlist_node *pos;
#endif
int hash = hash_long(tmask, TEMPLATES_HASH_BSIZE);
compat_hlist_for_each_entry(tpl, pos, &templates_hash[hash], hlist)
if (tpl->tpl_key == tmask)
return tpl;
tnum = 0;
/* assemble array of base_templates from template key */
/* NB: this should not have exporting protocol dependent checks */
if (tmask & BTPL_OPTION) {
switch (tmask) {
case OTPL_SYSITIME:
tlist[tnum++] = &template_sys_init_time;
break;
case OTPL_MPSTAT:
tlist[tnum++] = &template_meter_stat;
break;
case OTPL_MPRSTAT:
tlist[tnum++] = &template_meter_rel_stat;
break;
case OTPL_EPRSTAT:
tlist[tnum++] = &template_exp_rel_stat;
break;
#ifdef ENABLE_SAMPLER
case OTPL_SAMPLER:
tlist[tnum++] = &template_sampler;
break;
case OTPL_SEL_RAND:
tlist[tnum++] = &template_selector_random;
break;
case OTPL_SEL_COUNT:
tlist[tnum++] = &template_selector_systematic;
break;
case OTPL_SEL_STAT:
tlist[tnum++] = &template_selector_stat;
break;
case OTPL_SEL_STATH:
tlist[tnum++] = &template_selector_stat_hash;
break;
#endif
case OTPL_IFNAMES:
tlist[tnum++] = &template_interfaces;
break;
}
} else {
if (tmask & BTPL_IP4) {
tlist[tnum++] = &template_ipv4;
if (tmask & BTPL_IP4OPTIONS)
tlist[tnum++] = &template_options4;
if (tmask & BTPL_MASK4)
tlist[tnum++] = &template_ipv4_mask;
if (tmask & BTPL_ICMPX4)
tlist[tnum++] = &template_icmp_ipv4;
} else if (tmask & BTPL_IP6) {
tlist[tnum++] = &template_ipv6;
if (tmask & BTPL_LABEL6)
tlist[tnum++] = &template_label6;
if (tmask & BTPL_IP6OPTIONS)
tlist[tnum++] = &template_options6;
if (tmask & BTPL_ICMPX6)
tlist[tnum++] = &template_icmp_ipv6;
} else if (tmask & BTPL_NAT4)
tlist[tnum++] = &template_nat4;
if (tmask & BTPL_PORTS)
tlist[tnum++] = &template_ports;
else if (tmask & BTPL_ICMP9)
tlist[tnum++] = &template_icmp_v9;
if (tmask & BTPL_BASE9)
tlist[tnum++] = &template_base_9;
else if (tmask & BTPL_BASEIPFIX)
tlist[tnum++] = &template_base_ipfix;
if (tmask & BTPL_TCPOPTIONS)
tlist[tnum++] = &template_tcpoptions;
if (tmask & BTPL_IGMP)
tlist[tnum++] = &template_igmp;
if (tmask & BTPL_IPSEC)
tlist[tnum++] = &template_ipsec;
#ifdef ENABLE_MAC
if (tmask & BTPL_MAC)
tlist[tnum++] = &template_mac_ipfix;
#endif
#ifdef ENABLE_VLAN
if (tmask & BTPL_VLAN9)
tlist[tnum++] = &template_vlan_v9;
else {
if (tmask & BTPL_VLANX)
tlist[tnum++] = &template_vlan_ipfix;
if (tmask & BTPL_VLANI)
tlist[tnum++] = &template_vlan_inner;
}
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
if (tmask & BTPL_ETHERTYPE)
tlist[tnum++] = &template_ethertype;
#endif
#ifdef MPLS_DEPTH
if (tmask & BTPL_MPLS)
tlist[tnum++] = &template_mpls;
#endif
#ifdef ENABLE_DIRECTION
if (tmask & BTPL_DIRECTION)
tlist[tnum++] = &template_direction;
#endif
#ifdef ENABLE_SAMPLER
if (tmask & BTPL_SAMPLERID)
tlist[tnum++] = &template_samplerid;
else if (tmask & BTPL_SELECTORID)
tlist[tnum++] = &template_selectorid;
#endif
} /* !BTPL_OPTION */
/* calculate resulting template length
* and update base_template array lengths */
length = 0;
for (i = 0; i < tnum; i++) {
if (!tlist[i]->length) {
for (k = 0; tlist[i]->types[k]; k++);
tlist[i]->length = k;
}
length += tlist[i]->length;
}
/* elements are [type, len] pairs + one termiantor */
tpl = kmalloc(sizeof(struct data_template) + (length * 2 + 1) * sizeof(u_int16_t), GFP_KERNEL);
if (!tpl) {
printk(KERN_ERR "ipt_NETFLOW: unable to kmalloc template (%#x).\n", tmask);
return NULL;
}
tpl->tpl_key = tmask;
tpl->options = (tmask & BTPL_OPTION) != 0;
if (tpl->options)
tpl->tpl_size = sizeof(struct flowset_opt_tpl_v9); /* ipfix is of the same size */
else
tpl->tpl_size = sizeof(struct flowset_template);
tpl->length = length;
tpl->rec_size = 0;
tpl->template_id_n = htons(template_ids++);
tpl->exported_cnt = 0;
tpl->exported_ts = 0;
/* construct resulting data_template and fill lengths */
j = 0;
for (i = 0; i < tnum; i++) {
struct base_template *btpl = tlist[i];
for (k = 0; k < btpl->length; k++) {
int size;
int type = btpl->types[k];
tpl->fields[j++] = type;
size = tpl_element_sizes[type];
tpl->fields[j++] = size;
tpl->rec_size += size;
}
tpl->tpl_size += btpl->length * TPL_FIELD_NSIZE;
}
tpl->fields[j++] = 0;
hlist_add_head(&tpl->hlist, &templates_hash[hash]);
tpl_count++;
return tpl;
}
static u_int16_t scope_ipfix_to_v9(const u_int16_t elem)
{
switch (elem) {
case observationDomainId:
case meteringProcessId:
case exportingProcessId:
return V9_SCOPE_SYSTEM;
case ingressInterface:
case portId:
return V9_SCOPE_INTERFACE;
case observationPointId:
case LineCardId:
return V9_SCOPE_LINECARD;
case TemplateId:
return V9_SCOPE_TEMPLATE;
default:
return -1;
}
}
/* add template of any type and version */
static void pdu_add_template(struct data_template *tpl)
{
__u8 *ptr;
struct flowset_template *ntpl;
__be16 *sptr, *fields;
size_t added_size = 0;
/* for options template we also make sure there is enough
* room in the packet for one record, with flowset header */
if (tpl->options)
added_size = sizeof(struct flowset_data) + tpl->rec_size;
ptr = pdu_alloc_export(tpl->tpl_size + added_size);
pdu_rewind_space(added_size);
ntpl = (void *)ptr;
/* first three fields are equal for all types of templates */
if (tpl->options)
ntpl->flowset_id = protocol == 9? htons(FLOWSET_OPTIONS) : htons(IPFIX_OPTIONS);
else
ntpl->flowset_id = protocol == 9? htons(FLOWSET_TEMPLATE) : htons(IPFIX_TEMPLATE);
ntpl->length = htons(tpl->tpl_size);
ntpl->template_id = tpl->template_id_n;
if (tpl->options) {
/* option templates should be defined with first element being scope */
if (protocol == 9) {
struct flowset_opt_tpl_v9 *otpl = (void *)ptr;
otpl->scope_len = htons(TPL_FIELD_NSIZE);
otpl->opt_len = htons((tpl->length - 1) * TPL_FIELD_NSIZE);
ptr += sizeof(struct flowset_opt_tpl_v9);
} else {
struct flowset_opt_tpl_ipfix *otpl = (void *)ptr;
otpl->field_count = htons(tpl->length);
otpl->scope_count = htons(1);
ptr += sizeof(struct flowset_opt_tpl_ipfix);
}
} else {
ntpl->field_count = htons(tpl->length);
ptr += sizeof(struct flowset_template);
}
sptr = (__be16 *)ptr;
fields = tpl->fields;
if (tpl->options && protocol == 9) {
/* v9 scope */
*sptr++ = htons(scope_ipfix_to_v9(*fields++));
*sptr++ = htons(*fields++);
}
for (;;) {
const int type = *fields++;
if (!type)
break;
*sptr++ = htons(type);
*sptr++ = htons(*fields++);
}
tpl->exported_cnt = pdu_count;
tpl->exported_ts = jiffies;
pdu_flowset = NULL;
pdu_tpl_records++;
}
#ifdef ENABLE_DIRECTION
static inline __u8 hook2dir(const __u8 hooknum)
{
switch (hooknum) {
case NF_INET_PRE_ROUTING:
case NF_INET_LOCAL_IN:
return 0;
case NF_INET_LOCAL_OUT:
case NF_INET_POST_ROUTING:
return 1;
default:
return -1;
}
}
#endif
static inline void put_unaligned_be24(u32 val, unsigned char *p)
{
*p++ = val >> 16;
put_unaligned_be16(val, p);
}
static struct {
s64 ms; /* this much abs milliseconds */
unsigned long jiffies; /* is that much jiffies */
} jiffies_base;
/* prepare for jiffies_to_ms_abs() batch */
static void set_jiffies_base(void)
{
ktime_t ktime;
/* try to get them atomically */
local_bh_disable();
jiffies_base.jiffies = jiffies;
ktime = ktime_get_real();
local_bh_enable();
jiffies_base.ms = ktime_to_ms(ktime);
}
/* convert jiffies to ktime and rebase to unix epoch */
static inline s64 jiffies_to_ms_abs(unsigned long j)
{
long jdiff = jiffies_base.jiffies - j;
if (likely(jdiff >= 0))
return jiffies_base.ms - (s64)jiffies_to_msecs(jdiff);
else
return jiffies_base.ms + (s64)jiffies_to_msecs(-jdiff);
}
typedef struct in6_addr in6_t;
/* encode one field (data records only) */
static inline void add_tpl_field(__u8 *ptr, const int type, const struct ipt_netflow *nf)
{
switch (type) {
case IN_BYTES: put_unaligned_be32(nf->nr_bytes, ptr); break;
case IN_PKTS: put_unaligned_be32(nf->nr_packets, ptr); break;
case FIRST_SWITCHED: put_unaligned_be32(jiffies_to_msecs(nf->nf_ts_first), ptr); break;
case LAST_SWITCHED: put_unaligned_be32(jiffies_to_msecs(nf->nf_ts_last), ptr); break;
case flowStartMilliseconds: put_unaligned_be64(jiffies_to_ms_abs(nf->nf_ts_first), ptr); break;
case flowEndMilliseconds: put_unaligned_be64(jiffies_to_ms_abs(nf->nf_ts_last), ptr); break;
case IPV4_SRC_ADDR: put_unaligned(nf->tuple.src.ip, (__be32 *)ptr); break;
case IPV4_DST_ADDR: put_unaligned(nf->tuple.dst.ip, (__be32 *)ptr); break;
case IPV4_NEXT_HOP: put_unaligned(nf->nh.ip, (__be32 *)ptr); break;
case L4_SRC_PORT: put_unaligned(nf->tuple.s_port, (__be16 *)ptr); break;
case L4_DST_PORT: put_unaligned(nf->tuple.d_port, (__be16 *)ptr); break;
#ifdef SNMP_RULES
case INPUT_SNMP: put_unaligned_be16(nf->i_ifcr, ptr); break;
case OUTPUT_SNMP: put_unaligned_be16(nf->o_ifcr, ptr); break;
#else
case INPUT_SNMP: put_unaligned_be16(nf->tuple.i_ifc, ptr); break;
case OUTPUT_SNMP: put_unaligned_be16(nf->o_ifc, ptr); break;
#endif
#ifdef ENABLE_PHYSDEV
case ingressPhysicalInterface:
put_unaligned_be16(nf->i_ifphys, ptr); break;
case egressPhysicalInterface:
put_unaligned_be16(nf->o_ifphys, ptr); break;
#endif
#ifdef ENABLE_VLAN
#define EXTRACT_VLAN_PRIO(tag) ((ntohs(tag) & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT)
case SRC_VLAN:
case dot1qVlanId: put_unaligned(nf->tuple.tag[0] & htons(VLAN_VID_MASK), (__be16 *)ptr); break;
case dot1qPriority: *ptr = EXTRACT_VLAN_PRIO(nf->tuple.tag[0]); break;
case dot1qCustomerVlanId:
put_unaligned(nf->tuple.tag[1] & htons(VLAN_VID_MASK), (__be16 *)ptr); break;
case dot1qCustomerPriority: *ptr = EXTRACT_VLAN_PRIO(nf->tuple.tag[1]); break;
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
case ethernetType: put_unaligned(nf->ethernetType, (__be16 *)ptr); break;
#endif
#ifdef ENABLE_MAC
case destinationMacAddress: memcpy(ptr, &nf->tuple.h_dst, ETH_ALEN); break;
case sourceMacAddress: memcpy(ptr, &nf->tuple.h_src, ETH_ALEN); break;
#endif
#ifdef MPLS_DEPTH
# if __GNUC_PREREQ(4,6)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Warray-bounds"
# endif
case MPLS_LABEL_1: memcpy(ptr, &nf->tuple.mpls[0], 3); break;
case MPLS_LABEL_2: memcpy(ptr, &nf->tuple.mpls[1], 3); break;
case MPLS_LABEL_3: memcpy(ptr, &nf->tuple.mpls[2], 3); break;
# if MPLS_DEPTH > 3
case MPLS_LABEL_4: memcpy(ptr, &nf->tuple.mpls[3], 3); break;
case MPLS_LABEL_5: memcpy(ptr, &nf->tuple.mpls[4], 3); break;
case MPLS_LABEL_6: memcpy(ptr, &nf->tuple.mpls[5], 3); break;
case MPLS_LABEL_7: memcpy(ptr, &nf->tuple.mpls[6], 3); break;
case MPLS_LABEL_8: memcpy(ptr, &nf->tuple.mpls[7], 3); break;
case MPLS_LABEL_9: memcpy(ptr, &nf->tuple.mpls[8], 3); break;
case MPLS_LABEL_10: memcpy(ptr, &nf->tuple.mpls[9], 3); break;
# endif
# if __GNUC_PREREQ(4,6)
# pragma GCC diagnostic pop
# endif
case mplsTopLabelTTL: *ptr = ntohl(nf->tuple.mpls[0]); break;
#endif
#ifdef ENABLE_DIRECTION
case DIRECTION: *ptr = hook2dir(nf->hooknumx - 1); break;
#endif
case PROTOCOL: *ptr = nf->tuple.protocol; break;
case TCP_FLAGS: *ptr = nf->tcp_flags; break;
case TOS: *ptr = nf->tuple.tos; break;
case IPV6_SRC_ADDR: *(in6_t *)ptr = nf->tuple.src.in6; break;
case IPV6_DST_ADDR: *(in6_t *)ptr = nf->tuple.dst.in6; break;
case IPV6_NEXT_HOP: *(in6_t *)ptr = nf->nh.in6; break;
case IPV6_FLOW_LABEL: put_unaligned_be24(nf->flow_label, ptr); break;
case tcpOptions: put_unaligned_be32(nf->tcpoptions, ptr); break;
case ipv4Options: put_unaligned_be32(nf->options, ptr); break;
case IPV6_OPTION_HEADERS:
put_unaligned_be16(nf->options, ptr); break;
case SRC_MASK: *ptr = nf->s_mask; break;
case DST_MASK: *ptr = nf->d_mask; break;
case icmpTypeCodeIPv4: /*FALLTHROUGH*/
case icmpTypeCodeIPv6: put_unaligned(nf->tuple.d_port, (__be16 *)ptr); break;
case MUL_IGMP_TYPE: *ptr = nf->tuple.d_port; break;
case flowEndReason: *ptr = nf->flowEndReason; break;
#ifdef CONFIG_NF_NAT_NEEDED
case postNATSourceIPv4Address: put_unaligned(nf->nat->post.s_addr, (__be32 *)ptr); break;
case postNATDestinationIPv4Address: put_unaligned(nf->nat->post.d_addr, (__be32 *)ptr); break;
case postNAPTSourceTransportPort: put_unaligned(nf->nat->post.s_port, (__be16 *)ptr); break;
case postNAPTDestinationTransportPort: put_unaligned(nf->nat->post.d_port, (__be16 *)ptr); break;
case natEvent: *ptr = nf->nat->nat_event; break;
#endif
case IPSecSPI: put_unaligned(EXTRACT_SPI(nf->tuple), (__be32 *)ptr); break;
case observationTimeMilliseconds:
put_unaligned_be64(ktime_to_ms(nf->nf_ts_obs), ptr); break;
case observationTimeMicroseconds:
put_unaligned_be64(ktime_to_us(nf->nf_ts_obs), ptr); break;
case observationTimeNanoseconds:
put_unaligned_be64(ktime_to_ns(nf->nf_ts_obs), ptr); break;
#ifdef ENABLE_SAMPLER
case FLOW_SAMPLER_ID:
case selectorId:
*ptr = get_sampler_mode(); break;
#endif
default:
WARN_ONCE(1, "NETFLOW: Unknown Element id %d\n", type);
memset(ptr, 0, tpl_element_sizes[type]);
}
}
#define PAD_SIZE 4 /* rfc prescribes flowsets to be padded */
/* cache timeout_rate in jiffies */
static inline unsigned long timeout_rate_j(void)
{
static unsigned int t_rate = 0;
static unsigned long t_rate_j = 0;
if (unlikely(timeout_rate != t_rate)) {
struct timeval tv = { .tv_sec = timeout_rate * 60, .tv_usec = 0 };
t_rate = timeout_rate;
t_rate_j = timeval_to_jiffies(&tv);
}
return t_rate_j;
}
/* return buffer where to write records data */
static unsigned char *alloc_record_tpl(struct data_template *tpl)
{
unsigned char *ptr;
/* If previous write was to the same template and there is room, then we just add new record,
* otherwise we (re)allocate flowset (and/or whole pdu). */
if (!pdu_flowset ||
pdu_flowset->flowset_id != tpl->template_id_n ||
!(ptr = pdu_alloc_fail_export(tpl->rec_size))) {
/* if there was previous data template we should pad it to 4 bytes */
if (pdu_flowset) {
int padding = (PAD_SIZE - ntohs(pdu_flowset->length) % PAD_SIZE) % PAD_SIZE;
if (padding && (ptr = pdu_alloc_fail_export(padding))) {
pdu_flowset->length = htons(ntohs(pdu_flowset->length) + padding);
for (; padding; padding--)
*ptr++ = 0;
}
}
/* export template if needed */
if (!tpl->exported_ts ||
pdu_count > (tpl->exported_cnt + refresh_rate) ||
time_is_before_jiffies(tpl->exported_ts + timeout_rate_j())) {
pdu_add_template(tpl);
}
/* new flowset */
ptr = pdu_alloc_export(sizeof(struct flowset_data) + tpl->rec_size);
pdu_flowset = (struct flowset_data *)ptr;
pdu_flowset->flowset_id = tpl->template_id_n;
pdu_flowset->length = htons(sizeof(struct flowset_data));
ptr += sizeof(struct flowset_data);
}
return ptr;
}
static unsigned char *alloc_record_key(const unsigned int t_key, struct data_template **ptpl)
{
struct data_template *tpl;
tpl = get_template(t_key);
if (unlikely(!tpl)) {
printk(KERN_INFO "ipt_NETFLOW: template %#x allocation failed.\n", t_key);
NETFLOW_STAT_INC_ATOMIC(alloc_err);
return NULL;
}
*ptpl = tpl;
return alloc_record_tpl(tpl);
}
static void netflow_export_flow_tpl(struct ipt_netflow *nf)
{
unsigned char *ptr;
struct data_template *tpl;
unsigned int tpl_mask;
int i;
if (unlikely(debug > 2))
printk(KERN_INFO "adding flow to export (%d)\n",
pdu_data_records + pdu_tpl_records);
/* build the template key */
#ifdef CONFIG_NF_NAT_NEEDED
if (nf->nat) {
tpl_mask = BTPL_NAT4;
goto ready;
}
#endif
tpl_mask = (protocol == 9)? BTPL_BASE9 : BTPL_BASEIPFIX;
if (likely(nf->tuple.l3proto == AF_INET)) {
tpl_mask |= BTPL_IP4;
if (unlikely(nf->options))
tpl_mask |= BTPL_IP4OPTIONS;
} else {
tpl_mask |= BTPL_IP6;
if (unlikely(nf->options))
tpl_mask |= BTPL_IP6OPTIONS;
if (unlikely(nf->flow_label))
tpl_mask |= BTPL_LABEL6;
}
if (unlikely(nf->tcpoptions))
tpl_mask |= BTPL_TCPOPTIONS;
if (unlikely(nf->s_mask || nf->d_mask))
tpl_mask |= BTPL_MASK4;
if (likely(nf->tuple.protocol == IPPROTO_TCP ||
nf->tuple.protocol == IPPROTO_UDP ||
nf->tuple.protocol == IPPROTO_SCTP ||
nf->tuple.protocol == IPPROTO_UDPLITE))
tpl_mask |= BTPL_PORTS;
else if (nf->tuple.protocol == IPPROTO_ICMP ||
nf->tuple.protocol == IPPROTO_ICMPV6) {
if (protocol == 9)
tpl_mask |= BTPL_ICMP9;
else if (likely(nf->tuple.l3proto == AF_INET))
tpl_mask |= BTPL_ICMPX4;
else
tpl_mask |= BTPL_ICMPX6;
} else if (nf->tuple.protocol == IPPROTO_IGMP)
tpl_mask |= BTPL_IGMP;
else if (nf->tuple.protocol == IPPROTO_AH ||
nf->tuple.protocol == IPPROTO_ESP)
tpl_mask |= BTPL_IPSEC;
#ifdef ENABLE_MAC
if (!is_zero_ether_addr(nf->tuple.h_src) ||
!is_zero_ether_addr(nf->tuple.h_dst))
tpl_mask |= BTPL_MAC;
#endif
#ifdef ENABLE_VLAN
if (nf->tuple.tag[0]) {
if (protocol == 9)
tpl_mask |= BTPL_VLAN9;
else {
tpl_mask |= BTPL_VLANX;
if (nf->tuple.tag[1])
tpl_mask |= BTPL_VLANI;
}
}
#endif
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
if (nf->ethernetType)
tpl_mask |= BTPL_ETHERTYPE;
#endif
#ifdef MPLS_DEPTH
if (nf->tuple.mpls[0])
tpl_mask |= BTPL_MPLS;
#endif
#ifdef ENABLE_DIRECTION
if (nf->hooknumx)
tpl_mask |= BTPL_DIRECTION;
#endif
#ifdef ENABLE_SAMPLER
if (get_sampler_mode())
tpl_mask |= (protocol == 9)? BTPL_SAMPLERID : BTPL_SELECTORID;
#endif
#ifdef CONFIG_NF_NAT_NEEDED
ready:
#endif
ptr = alloc_record_key(tpl_mask, &tpl);
if (unlikely(!ptr)) {
NETFLOW_STAT_ADD(pkt_lost, nf->nr_packets);
NETFLOW_STAT_ADD(traf_lost, nf->nr_bytes);
NETFLOW_STAT_INC(flow_lost);
NETFLOW_STAT_TS(lost);
ipt_netflow_free(nf);
return;
}
/* encode all fields */
for (i = 0; ; ) {
int type = tpl->fields[i++];
if (!type)
break;
add_tpl_field(ptr, type, nf);
ptr += tpl->fields[i++];
}
pdu_data_records++;
pdu_flow_records++;
pdu_flowset->length = htons(ntohs(pdu_flowset->length) + tpl->rec_size);
pdu_packets += nf->nr_packets;
pdu_traf += nf->nr_bytes;
pdu_ts_mod = jiffies;
ipt_netflow_free(nf);
}
static u64 get_sys_init_time_ms(void)
{
static u64 sys_init_time = 0;
if (!sys_init_time)
sys_init_time = ktime_to_ms(ktime_get_real()) - jiffies_to_msecs(jiffies);
return sys_init_time;
}
#ifdef ENABLE_SAMPLER
/* http://www.iana.org/assignments/ipfix/ipfix.xml#ipfix-flowselectoralgorithm */
static unsigned char get_flowselectoralgo(void)
{
switch (get_sampler_mode()) {
case SAMPLER_DETERMINISTIC:
return 1; /* Systematic count-based Sampling */
case SAMPLER_HASH:
case SAMPLER_RANDOM:
return 3; /* Random n-out-of-N Sampling */
default:
return 0; /* Unassigned */
}
}
#endif
static void export_stat_st_ts(const unsigned int tpl_mask, struct ipt_netflow_stat *st, struct duration *ts)
{
unsigned char *ptr;
struct data_template *tpl;
int i;
ptr = alloc_record_key(tpl_mask, &tpl);
if (unlikely(!ptr))
return;
/* encode all fields */
for (i = 0; ; ) {
int type = tpl->fields[i++];
if (!type)
break;
switch (type) {
case observationDomainId: put_unaligned_be32(engine_id, ptr); break;
case exportingProcessId: put_unaligned_be32(engine_id, ptr); break;
case observedFlowTotalCount: put_unaligned_be64(st->notfound, ptr); break;
case exportedMessageTotalCount: put_unaligned_be64(st->exported_pkt, ptr); break;
case exportedOctetTotalCount: put_unaligned_be64(st->exported_traf, ptr); break;
case exportedFlowRecordTotalCount: put_unaligned_be64(st->exported_flow, ptr); break;
case ignoredPacketTotalCount: put_unaligned_be64(st->pkt_drop, ptr); break;
case ignoredOctetTotalCount: put_unaligned_be64(st->traf_drop, ptr); break;
case notSentFlowTotalCount: put_unaligned_be64(st->flow_lost, ptr); break;
case notSentPacketTotalCount: put_unaligned_be64(st->pkt_lost, ptr); break;
case notSentOctetTotalCount: put_unaligned_be64(st->traf_lost, ptr); break;
case flowStartMilliseconds: put_unaligned_be64(ktime_to_ms(ts->first), ptr); break;
case flowEndMilliseconds: put_unaligned_be64(ktime_to_ms(ts->last), ptr); break;
case systemInitTimeMilliseconds: put_unaligned_be64(get_sys_init_time_ms(), ptr); break;
case observationDomainName: memcpy(ptr, version_string, version_string_size + 1); break;
#ifdef ENABLE_SAMPLER
case FLOW_SAMPLER_ID:
case selectorId:
*ptr = get_sampler_mode(); break;
case FLOW_SAMPLER_MODE:
*ptr = get_sampler_mode_nf(); break;
case flowSelectorAlgorithm: *ptr = get_flowselectoralgo(); break;
case samplingSize:
case samplingFlowInterval:
*ptr = 1 /* always 'one-out-of' */; break;
case samplingFlowSpacing:
case samplingPopulation:
case FLOW_SAMPLER_RANDOM_INTERVAL:
put_unaligned_be16(get_sampler_interval(), ptr); break;
case selectorIDTotalFlowsObserved: put_unaligned_be64(atomic64_read(&flows_observed), ptr); break;
case selectorIDTotalFlowsSelected: put_unaligned_be64(atomic64_read(&flows_selected), ptr); break;
case selectorIdTotalPktsObserved: put_unaligned_be64(st->pkts_observed, ptr); break;
case selectorIdTotalPktsSelected: put_unaligned_be64(st->pkts_selected, ptr); break;
#endif
default:
WARN_ONCE(1, "NETFLOW: Unknown Element id %d\n", type);
}
ptr += tpl->fields[i++];
}
pdu_data_records++;
pdu_flowset->length = htons(ntohs(pdu_flowset->length) + tpl->rec_size);
pdu_ts_mod = jiffies;
}
static inline void export_stat_ts(const unsigned int tpl_mask, struct duration *ts)
{
export_stat_st_ts(tpl_mask, NULL, ts);
}
static inline void export_stat_st(const unsigned int tpl_mask, struct ipt_netflow_stat *st)
{
export_stat_st_ts(tpl_mask, st, NULL);
}
static inline void export_stat(const unsigned int tpl_mask)
{
export_stat_st(tpl_mask, NULL);
}
static void netflow_export_stats(void)
{
struct ipt_netflow_stat t = { 0 };
int cpu;
if (unlikely(!ts_sysinf_last) ||
time_is_before_jiffies(ts_sysinf_last + SYSINFO_INTERVAL * HZ)) {
start_ts.last = ktime_get_real();
export_stat_ts(OTPL_SYSITIME, &start_ts);
ts_sysinf_last = jiffies;
pdu_needs_export++;
}
if (unlikely(!ts_stat_last))
ts_stat_last = jiffies;
if (likely(time_is_after_jiffies(ts_stat_last + STAT_INTERVAL * HZ)))
return;
for_each_present_cpu(cpu) {
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
t.notfound += st->notfound; // observedFlowTotalCount
t.exported_pkt += st->exported_pkt; // exportedMessageTotalCount
t.exported_traf += st->exported_traf; // exportedOctetTotalCount
t.exported_flow += st->exported_flow; // exportedFlowRecordTotalCount
t.pkt_drop += st->pkt_drop; // ignoredPacketTotalCount
t.traf_drop += st->traf_drop; // ignoredOctetTotalCount
t.flow_lost += st->flow_lost; // notSentFlowTotalCount
t.pkt_lost += st->pkt_lost; // notSentPacketTotalCount
t.traf_lost += st->traf_lost; // notSentOctetTotalCount
#ifdef ENABLE_SAMPLER
t.pkts_selected += st->pkts_selected;
t.pkts_observed += st->pkts_observed;
#endif
t.drop.first_tv64 = min_not_zero(t.drop.first_tv64, st->drop.first_tv64);
t.drop.last_tv64 = max(t.drop.last_tv64, st->drop.last_tv64);
t.lost.first_tv64 = min_not_zero(t.lost.first_tv64, st->lost.first_tv64);
t.lost.last_tv64 = max(t.lost.last_tv64, st->lost.last_tv64);
}
export_stat_st(OTPL_MPSTAT, &t);
if (t.pkt_drop)
export_stat_st_ts(OTPL_MPRSTAT, &t, &t.drop);
if (t.pkt_lost)
export_stat_st_ts(OTPL_EPRSTAT, &t, &t.lost);
#ifdef ENABLE_SAMPLER
if (protocol == 10) {
sampling_ts.last = ktime_get_real();
switch (get_sampler_mode()) {
case SAMPLER_HASH:
export_stat_st_ts(OTPL_SEL_STATH, &t, &sampling_ts);
break;
case SAMPLER_DETERMINISTIC:
case SAMPLER_RANDOM:
export_stat_st_ts(OTPL_SEL_STAT, &t, &sampling_ts);
}
}
#endif
ts_stat_last = jiffies;
pdu_needs_export++;
}
#ifdef ENABLE_SAMPLER
static void export_sampler_parameters(void)
{
if (get_sampler_mode() &&
(unlikely(!ts_sampler_last) ||
time_is_before_jiffies(ts_sampler_last + SAMPLER_INFO_INTERVAL * HZ))) {
if (protocol == 9)
export_stat(OTPL_SAMPLER);
else {
const unsigned char mode = get_sampler_mode();
if (mode == SAMPLER_DETERMINISTIC)
export_stat(OTPL_SEL_COUNT);
else
export_stat(OTPL_SEL_RAND);
}
ts_sampler_last = jiffies;
}
}
#endif
static int ethtool_drvinfo(unsigned char *ptr, size_t size, struct net_device *dev)
{
struct ethtool_drvinfo info = { 0 };
const struct ethtool_ops *ops = dev->ethtool_ops;
#ifndef ETHTOOL_GLINKSETTINGS
struct ethtool_cmd ecmd;
#define _KSETTINGS(x, y) (x)
#else
struct ethtool_link_ksettings ekmd;
#define _KSETTINGS(x, y) (y)
#endif
int len = size;
int n;
if (len <= 0 || !ops)
return 0;
if (ops->begin) {
/* was not called before __ethtool_get_settings() though */
if (ops->begin(dev) < 0)
return 0;
}
/* driver name */
if (ops->get_drvinfo)
ops->get_drvinfo(dev, &info);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)
else if (dev->dev.parent && dev->dev.parent->driver) {
strlcpy(info.driver, dev->dev.parent->driver->name, sizeof(info.driver));
}
#endif
n = scnprintf(ptr, len, "%s", info.driver);
ptr += n;
len -= n;
if (!n || len <= 1) /* have room for separator too */
goto ret;
/* only get_settings for running devices to not trigger link negotiation */
if (dev->flags & IFF_UP &&
dev->flags & IFF_RUNNING &&
!_KSETTINGS(__ethtool_get_settings(dev, &ecmd), __ethtool_get_link_ksettings(dev, &ekmd))) {
char *units, *p;
__u32 speed = _KSETTINGS(ethtool_cmd_speed(&ecmd), ekmd.base.speed);
if (speed == SPEED_UNKNOWN)
units = "";
else if (speed <= 1000)
units = "MbE";
else {
speed /= 1000;
units = "GbE";
}
switch (_KSETTINGS(ecmd.port, ekmd.base.port)) {
case PORT_TP: p = "tp"; break;
case PORT_AUI: p = "aui"; break;
case PORT_MII: p = "mii"; break;
case PORT_FIBRE: p = "fb"; break;
case PORT_BNC: p = "bnc"; break;
#ifdef PORT_DA
case PORT_DA: p = "da"; break;
#endif
default: p = "";
}
n = scnprintf(ptr, len, ",%d%s,%s", speed, units, p);
len -= n;
}
ret:
if (ops->complete)
ops->complete(dev);
return size - len;
}
#undef _KSETTINGS
static const unsigned short netdev_type[] =
{ARPHRD_NETROM, ARPHRD_ETHER, ARPHRD_AX25,
ARPHRD_IEEE802, ARPHRD_ARCNET,
ARPHRD_DLCI, ARPHRD_ATM, ARPHRD_METRICOM,
ARPHRD_IEEE1394, ARPHRD_EUI64, ARPHRD_INFINIBAND,
ARPHRD_SLIP, ARPHRD_CSLIP, ARPHRD_SLIP6, ARPHRD_CSLIP6,
ARPHRD_ROSE, ARPHRD_X25, ARPHRD_HWX25,
ARPHRD_PPP, ARPHRD_CISCO, ARPHRD_LAPB, ARPHRD_DDCMP,
ARPHRD_RAWHDLC, ARPHRD_TUNNEL, ARPHRD_TUNNEL6, ARPHRD_FRAD,
ARPHRD_LOOPBACK, ARPHRD_LOCALTLK, ARPHRD_FDDI,
ARPHRD_SIT, ARPHRD_IPDDP, ARPHRD_IPGRE,
ARPHRD_PIMREG, ARPHRD_HIPPI, ARPHRD_IRDA,
ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM,
ARPHRD_IEEE80211_RADIOTAP, ARPHRD_PHONET, ARPHRD_PHONET_PIPE,
ARPHRD_IEEE802154, ARPHRD_VOID, ARPHRD_NONE};
static const char *const netdev_type_name[] =
{"NET/ROM", "Ethernet", "AX.25 Level 2",
"IEEE 802.2 Ethernet", "ARCnet",
"Frame Relay DLCI", "ATM", "Metricom STRIP",
"IEEE 1394 IPv4", "EUI-64", "InfiniBand",
"SLIP", "CSLIP", "SLIP6", "CSLIP6",
"ROSE", "X.25", "HW X.25",
"PPP", "Cisco HDLC", "LAPB", "DDCMP",
"Raw HDLC", "IPIP Tunnel", "IP6IP6 Tunnel", "FRAD",
"Loopback", "Localtalk", "FDDI",
"SIT Tunnel", "IP over DDP", "GRE over IP",
"PISM Register", "HIPPI", "IrDA",
"IEEE 802.11", "IEEE 802.11 Prism2",
"IEEE 802.11 Radiotap", "PhoNet", "PhoNet pipe",
"IEEE 802.15.4", "void", "none"};
static const char *dev_type(int dev_type)
{
int i;
BUG_ON(ARRAY_SIZE(netdev_type) != ARRAY_SIZE(netdev_type_name));
for (i = 0; i < ARRAY_SIZE(netdev_type); i++)
if (netdev_type[i] == dev_type)
return netdev_type_name[i];
return "";
}
static void export_dev(struct net_device *dev)
{
unsigned char *ptr;
struct data_template *tpl;
int i;
ptr = alloc_record_key(OTPL_IFNAMES, &tpl);
if (unlikely(!ptr))
return;
/* encode all fields */
for (i = 0; ; ) {
int type = tpl->fields[i++];
int size = tpl->fields[i++];
int n;
if (!type)
break;
switch (type) {
case observationDomainId:
put_unaligned_be32(engine_id, ptr);
break;
case IF_NAME:
n = scnprintf(ptr, size, "%s", dev->name);
memset(ptr + n, 0, size - n);
break;
case IF_DESC:
/* manual dev 'alias' setting is a first priority,
* then ethtool driver name with basic info,
* finally net_device.type is a last resort */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)
if (dev->ifalias)
n = scnprintf(ptr, size, "%s", dev->ifalias);
else
#endif
n = ethtool_drvinfo(ptr, size, dev);
if (!n)
n = scnprintf(ptr, size, "%s", dev_type(dev->type));
memset(ptr + n, 0, size - n);
break;
case INPUT_SNMP:
#ifdef SNMP_RULES
rcu_read_lock();
put_unaligned_be16(resolve_snmp(dev), ptr);
rcu_read_unlock();
#else
put_unaligned_be16(dev->ifindex, ptr);
#endif
break;
default:
WARN_ONCE(1, "NETFLOW: Unknown Element id %d\n", type);
}
ptr += size;
}
pdu_data_records++;
pdu_flowset->length = htons(ntohs(pdu_flowset->length) + tpl->rec_size);
pdu_ts_mod = jiffies;
}
static void export_ifnames(void)
{
struct net_device *dev;
if (likely(ts_ifnames_last) &&
time_is_after_jiffies(ts_ifnames_last + SYSINFO_INTERVAL * HZ))
return;
rtnl_lock();
for_each_netdev_ns(&init_net, dev) {
export_dev(dev);
}
rtnl_unlock();
ts_ifnames_last = jiffies;
}
/* under pause_scan_worker() */
static void netflow_switch_version(const int ver)
{
protocol = ver;
if (protocol == 5) {
memset(&pdu, 0, sizeof(pdu));
pdu_data_used = NULL;
pdu_high_wm = NULL;
netflow_export_flow = &netflow_export_flow_v5;
netflow_export_pdu = &netflow_export_pdu_v5;
} else if (protocol == 9) {
pdu_data_used = pdu.v9.data;
pdu_high_wm = (unsigned char *)&pdu + sizeof(pdu.v9);
netflow_export_flow = &netflow_export_flow_tpl;
netflow_export_pdu = &netflow_export_pdu_v9;
} else { /* IPFIX */
pdu_data_used = pdu.ipfix.data;
pdu_high_wm = (unsigned char *)&pdu + sizeof(pdu.ipfix);
netflow_export_flow = &netflow_export_flow_tpl;
netflow_export_pdu = &netflow_export_pdu_ipfix;
}
pdu.version = htons(protocol);
free_templates();
pdu_flow_records = pdu_data_records = pdu_tpl_records = 0;
pdu_flowset = NULL;
printk(KERN_INFO "ipt_NETFLOW protocol version %d (%s) enabled.\n",
protocol, protocol == 10? "IPFIX" : "NetFlow");
}
#ifdef CONFIG_NF_NAT_NEEDED
static void export_nat_event(struct nat_event *nel)
{
static struct ipt_netflow nf = { { NULL } };
nf.tuple.l3proto = AF_INET;
nf.tuple.protocol = nel->protocol;
nf.nat = nel; /* this is also flag of dummy flow */
nf.tcp_flags = (nel->nat_event == NAT_DESTROY)? TCP_FIN_RST : TCP_SYN_ACK;
if (protocol >= 9) {
nf.nf_ts_obs = nel->ts_ktime;
nf.tuple.src.ip = nel->pre.s_addr;
nf.tuple.dst.ip = nel->pre.d_addr;
nf.tuple.s_port = nel->pre.s_port;
nf.tuple.d_port = nel->pre.d_port;
netflow_export_flow(&nf);
} else { /* v5 */
/* The weird v5 packet(s).
* src and dst will be same as in data flow from the FORWARD chain
* where src is pre-nat src ip and dst is post-nat dst ip.
* What we lacking here is external src ip for SNAT, or
* pre-nat dst ip for DNAT. We will put this into Nexthop field
* with port into src/dst AS field. tcp_flags will distinguish it's
* start or stop event. Two flows in case of full nat. */
nf.tuple.src.ip = nel->pre.s_addr;
nf.tuple.s_port = nel->pre.s_port;
nf.tuple.dst.ip = nel->post.d_addr;
nf.tuple.d_port = nel->post.d_port;
nf.nf_ts_first = nel->ts_jiffies;
nf.nf_ts_last = nel->ts_jiffies;
if (nel->pre.s_addr != nel->post.s_addr ||
nel->pre.s_port != nel->post.s_port) {
nf.nh.ip = nel->post.s_addr;
nf.s_as = nel->post.s_port;
nf.d_as = 0;
netflow_export_flow(&nf);
}
if (nel->pre.d_addr != nel->post.d_addr ||
nel->pre.d_port != nel->post.d_port) {
nf.nh.ip = nel->pre.d_addr;
nf.s_as = 0;
nf.d_as = nel->pre.d_port;
netflow_export_flow(&nf);
}
}
kfree(nel);
}
#endif /* CONFIG_NF_NAT_NEEDED */
static inline int active_needs_export(const struct ipt_netflow *nf, const long a_timeout,
const unsigned long j)
{
return ((j - nf->nf_ts_first) > a_timeout) ||
nf->nr_bytes >= FLOW_FULL_WATERMARK;
}
/* return flowEndReason (rfc5102) */
/* i_timeout == 0 is flush */
static inline int inactive_needs_export(const struct ipt_netflow *nf, const long i_timeout,
const unsigned long j)
{
if (likely(i_timeout)) {
if (unlikely((j - nf->nf_ts_last) > i_timeout)) {
if (nf->tuple.protocol == IPPROTO_TCP &&
(nf->tcp_flags & TCP_FIN_RST))
return 0x03; /* end of Flow detected */
else
return 0x01; /* idle timeout */
} else
return 0;
} else
return 0x04; /* forced end */
}
/* helper which also record to nf->flowEndReason */
static inline int needs_export_rec(struct ipt_netflow *nf, const long i_timeout,
const long a_timeout, const unsigned long j)
{
int reason = inactive_needs_export(nf, i_timeout, j);
if (!reason && active_needs_export(nf, a_timeout, j))
reason = 0x02; /* active timeout or just active flow */
return (nf->flowEndReason = reason);
}
/* could be called with zero to flush cache and pdu */
/* this function is guaranteed to be called non-concurrently */
/* return number of pdus sent */
static int netflow_scan_and_export(const int flush)
{
const long i_timeout = flush? 0 : inactive_timeout * HZ;
const long a_timeout = active_timeout * HZ;
#ifdef HAVE_LLIST
struct llist_node *node;
#endif
const int pdu_c = pdu_count;
LIST_HEAD(export_list);
struct ipt_netflow *nf, *tmp;
int i;
#ifdef ENABLE_SAMPLER
unsigned char mode;
#endif
if (protocol >= 9) {
netflow_export_stats();
#ifdef ENABLE_SAMPLER
export_sampler_parameters();
#endif
export_ifnames();
}
read_lock_bh(&htable_rwlock);
for (i = 0; i < LOCK_COUNT; i++) {
struct stripe_entry *stripe = &htable_stripes[i];
if (!spin_trylock(&stripe->lock)) {
++wk_trylock;
continue;
}
list_for_each_entry_safe_reverse(nf, tmp, &stripe->list, flows_list) {
++wk_count;
if (needs_export_rec(nf, i_timeout, a_timeout, jiffies)) {
hlist_del(&nf->hlist);
list_del(&nf->flows_list);
list_add(&nf->flows_list, &export_list);
} else {
/* all flows which need to be exported is always at the tail
* so if no more exportable flows we can break */
break;
}
}
spin_unlock(&stripe->lock);
}
read_unlock_bh(&htable_rwlock);
#ifdef HAVE_LLIST
node = llist_del_all(&export_llist);
while (node) {
struct llist_node *next = node->next;
nf = llist_entry(node, struct ipt_netflow, flows_llnode);
++wk_llist;
list_add(&nf->flows_list, &export_list);
node = next;
}
#endif
#ifdef ENABLE_SAMPLER
mode = get_sampler_mode();
#endif
set_jiffies_base();
list_for_each_entry_safe(nf, tmp, &export_list, flows_list) {
NETFLOW_STAT_ADD(pkt_out, nf->nr_packets);
NETFLOW_STAT_ADD(traf_out, nf->nr_bytes);
list_del(&nf->flows_list);
#ifdef ENABLE_SAMPLER
if (mode) {
const unsigned int interval = get_sampler_interval();
unsigned int val; /* [0..interval) */
atomic64_inc(&flows_observed);
NETFLOW_STAT_ADD_ATOMIC(pkts_observed, nf->nr_packets);
switch (mode) {
case SAMPLER_DETERMINISTIC:
val = nf->sampler_count % interval;
break;
case SAMPLER_RANDOM:
val = prandom_u32_max(interval);
break;
default: /* SAMPLER_HASH */
val = 0;
}
if (val) {
ipt_netflow_free(nf);
continue;
}
atomic64_inc(&flows_selected);
NETFLOW_STAT_ADD_ATOMIC(pkts_selected, nf->nr_packets);
}
#endif
netflow_export_flow(nf);
}
#ifdef CONFIG_NF_NAT_NEEDED
spin_lock_bh(&nat_lock);
while (!list_empty(&nat_list)) {
struct nat_event *nel;
nel = list_entry(nat_list.next, struct nat_event, list);
list_del(&nel->list);
spin_unlock_bh(&nat_lock);
export_nat_event(nel);
spin_lock_bh(&nat_lock);
}
spin_unlock_bh(&nat_lock);
#endif
/* flush flows stored in pdu if there no new flows for too long */
/* Note: using >= to allow flow purge on zero timeout */
if ((jiffies - pdu_ts_mod) >= i_timeout || pdu_needs_export) {
netflow_export_pdu();
pdu_needs_export = 0;
}
return pdu_count - pdu_c;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
static void netflow_work_fn(void *dummy)
#else
static void netflow_work_fn(struct work_struct *dummy)
#endif
{
int pdus;
wk_count = 0;
wk_trylock = 0;
wk_llist = 0;
wk_cpu = smp_processor_id();
wk_start = jiffies;
pdus = netflow_scan_and_export(DONT_FLUSH);
_schedule_scan_worker(pdus);
wk_busy = jiffies - wk_start;
}
#define RATESHIFT 2
#define SAMPLERATE (RATESHIFT*RATESHIFT)
#define NUMSAMPLES(minutes) (minutes * 60 / SAMPLERATE)
#define _A(v, m) (v) * (1024 * 2 / (NUMSAMPLES(m) + 1)) >> 10
// x * (1024 / y) >> 10 is because I can not just divide long long integer
// Note that CALC_RATE arguments should never be unsigned.
#define CALC_RATE(ewma, cur, minutes) ewma += _A(cur - ewma, minutes)
// calculate EWMA throughput rate for whole module
static void rate_timer_calc(unsigned long dummy)
{
static u64 old_pkt_total = 0;
static u64 old_traf_total = 0;
static u64 old_searched = 0;
static u64 old_found = 0;
static u64 old_notfound = 0;
u64 searched = 0;
u64 found = 0;
u64 notfound = 0;
int dsrch, dfnd, dnfnd;
u64 pkt_total = 0;
u64 traf_total = 0;
int cpu;
for_each_present_cpu(cpu) {
int metrt;
struct ipt_netflow_stat *st = &per_cpu(ipt_netflow_stat, cpu);
u64 pkt_t = st->pkt_total;
pkt_total += pkt_t;
st->pkt_total_rate = (pkt_t - st->pkt_total_prev) >> RATESHIFT;
st->pkt_total_prev = pkt_t;
traf_total += st->traf_total;
searched += st->searched;
found += st->found;
notfound += st->notfound;
st->exported_rate = (st->exported_traf - st->exported_trafo) >> RATESHIFT;
st->exported_trafo = st->exported_traf;
/* calculate hash metric per cpu */
dsrch = st->searched - st->old_searched;
dfnd = st->found - st->old_found;
dnfnd = st->notfound - st->old_notfound;
/* zero values are not accounted, becasue only usage is interesting, not nonusage */
metrt = (dfnd + dnfnd)? 100 * (dsrch + dfnd + dnfnd) / (dfnd + dnfnd) : st->metric;
CALC_RATE(st->metric, metrt, 1);
st->old_searched = st->searched;
st->old_found = st->found;
st->old_notfound = st->notfound;
}
sec_prate = (pkt_total - old_pkt_total) >> RATESHIFT;
CALC_RATE(min5_prate, sec_prate, 5);
CALC_RATE(min_prate, sec_prate, 1);
old_pkt_total = pkt_total;
sec_brate = ((traf_total - old_traf_total) * 8) >> RATESHIFT;
CALC_RATE(min5_brate, sec_brate, 5);
CALC_RATE(min_brate, sec_brate, 1);
old_traf_total = traf_total;
/* hash stat */
dsrch = searched - old_searched;
dfnd = found - old_found;
dnfnd = notfound - old_notfound;
old_searched = searched;
old_found = found;
old_notfound = notfound;
/* if there is no access to hash keep rate steady */
metric = (dfnd + dnfnd)? 100 * (dsrch + dfnd + dnfnd) / (dfnd + dnfnd) : metric;
CALC_RATE(min15_metric, metric, 15);
CALC_RATE(min5_metric, metric, 5);
CALC_RATE(min_metric, metric, 1);
/* yes, timer delay is not accounted, but this stat is just estimational */
mod_timer(&rate_timer, jiffies + (HZ * SAMPLERATE));
}
#ifdef CONFIG_NF_NAT_NEEDED
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
static struct nf_ct_event_notifier *saved_event_cb __read_mostly = NULL;
static int netflow_conntrack_event(const unsigned int events, struct nf_ct_event *item)
#else
static int netflow_conntrack_event(struct notifier_block *this, unsigned long events, void *ptr)
#endif
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
struct nf_conn *ct = item->ct;
#else
struct nf_conn *ct = (struct nf_conn *)ptr;
#endif
struct nat_event *nel;
const struct nf_conntrack_tuple *t;
int ret = NOTIFY_DONE;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
struct nf_ct_event_notifier *notifier;
/* Call netlink first. */
notifier = rcu_dereference(saved_event_cb);
if (likely(notifier))
ret = notifier->fcn(events, item);
#endif
if (unlikely(!natevents))
return ret;
if (!(events & ((1 << IPCT_NEW) | (1 << IPCT_RELATED) | (1 << IPCT_DESTROY))))
return ret;
if (!(ct->status & IPS_NAT_MASK))
return ret;
if (unlikely(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num != AF_INET ||
ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.l3num != AF_INET)) {
/* Well, there is no linux NAT for IPv6 anyway. */
return ret;
}
if (!(nel = kmalloc(sizeof(struct nat_event), GFP_ATOMIC))) {
printk(KERN_ERR "ipt_NETFLOW: can't kmalloc nat event\n");
return ret;
}
memset(nel, 0, sizeof(struct nat_event));
nel->ts_ktime = ktime_get_real();
nel->ts_jiffies = jiffies;
t = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
nel->protocol = t->dst.protonum;
nel->pre.s_addr = t->src.u3.ip;
nel->pre.d_addr = t->dst.u3.ip;
nel->pre.s_port = t->src.u.all;
nel->pre.d_port = t->dst.u.all;
t = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
/* reply is reversed */
nel->post.s_addr = t->dst.u3.ip;
nel->post.d_addr = t->src.u3.ip;
nel->post.s_port = t->dst.u.all;
nel->post.d_port = t->src.u.all;
if (events & (1 << IPCT_DESTROY)) {
nel->nat_event = NAT_DESTROY;
nat_events_stop++;
} else {
nel->nat_event = NAT_CREATE;
nat_events_start++;
}
spin_lock_bh(&nat_lock);
list_add_tail(&nel->list, &nat_list);
spin_unlock_bh(&nat_lock);
return ret;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
static struct notifier_block ctnl_notifier = {
.notifier_call = netflow_conntrack_event
};
#else
static struct nf_ct_event_notifier ctnl_notifier = {
.fcn = netflow_conntrack_event
};
#endif /* since 2.6.31 */
#endif /* CONFIG_NF_NAT_NEEDED */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && \
LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
static bool
#else
static int
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
netflow_target_check(const char *tablename, const void *entry, const struct xt_target *target,
void *targinfo,
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
unsigned int targinfosize,
#endif
unsigned int hook_mask)
{
#else
netflow_target_check(const struct xt_tgchk_param *par)
{
const char *tablename = par->table;
const struct xt_target *target = par->target;
#endif
if (strcmp("nat", tablename) == 0) {
/* In the nat table we only see single packet per flow, which is useless. */
printk(KERN_ERR "%s target: is not valid in %s table\n", target->name, tablename);
return CHECK_FAIL;
}
if (target->family == AF_INET6 && protocol == 5) {
printk(KERN_ERR "ip6tables NETFLOW target is meaningful for protocol 9 or 10 only.\n");
return CHECK_FAIL;
}
return CHECK_OK;
}
#define SetXBit(x) (0x8000 >> (x)) /* Proper bit for htons later. */
static inline __u16 observed_hdrs(const __u8 currenthdr)
{
switch (currenthdr) {
case IPPROTO_TCP:
case IPPROTO_UDP:
/* For speed, in case switch is not optimized. */
return 0;
case IPPROTO_DSTOPTS: return SetXBit(0);
case IPPROTO_HOPOPTS: return SetXBit(1);
case IPPROTO_ROUTING: return SetXBit(5);
case IPPROTO_MH: return SetXBit(12);
case IPPROTO_ESP: return SetXBit(13);
case IPPROTO_AH: return SetXBit(14);
case IPPROTO_COMP: return SetXBit(15);
case IPPROTO_FRAGMENT: /* Handled elsewhere. */
/* Next is known headers. */
case IPPROTO_ICMPV6:
case IPPROTO_UDPLITE:
case IPPROTO_IPIP:
case IPPROTO_PIM:
case IPPROTO_GRE:
case IPPROTO_SCTP:
#ifdef IPPROTO_L2TP
case IPPROTO_L2TP:
#endif
case IPPROTO_DCCP:
return 0;
}
return SetXBit(3); /* Unknown header. */
}
/* http://www.iana.org/assignments/ip-parameters/ip-parameters.xhtml */
static const __u8 ip4_opt_table[] = {
[7] = 0, /* RR */ /* parsed manually because of 0 */
[134] = 1, /* CIPSO */
[133] = 2, /* E-SEC */
[68] = 3, /* TS */
[131] = 4, /* LSR */
[130] = 5, /* SEC */
[1] = 6, /* NOP */
[0] = 7, /* EOOL */
[15] = 8, /* ENCODE */
[142] = 9, /* VISA */
[205] = 10, /* FINN */
[12] = 11, /* MTUR */
[11] = 12, /* MTUP */
[10] = 13, /* ZSU */
[137] = 14, /* SSR */
[136] = 15, /* SID */
[151] = 16, /* DPS */
[150] = 17, /* NSAPA */
[149] = 18, /* SDB */
[147] = 19, /* ADDEXT */
[148] = 20, /* RTRALT */
[82] = 21, /* TR */
[145] = 22, /* EIP */
[144] = 23, /* IMITD */
[30] = 25, /* EXP */
[94] = 25, /* EXP */
[158] = 25, /* EXP */
[222] = 25, /* EXP */
[25] = 30, /* QS */
[152] = 31, /* UMP */
};
/* Parse IPv4 Options array int ipv4Options IPFIX value. */
static inline __u32 ip4_options(const u_int8_t *p, const unsigned int optsize)
{
__u32 ret = 0;
unsigned int i;
for (i = 0; likely(i < optsize); ) {
u_int8_t op = p[i++];
if (op == 7) /* RR: bit 0 */
ret |= 1;
else if (likely(op < ARRAY_SIZE(ip4_opt_table))) {
/* Btw, IANA doc is messed up in a crazy way:
* http://www.ietf.org/mail-archive/web/ipfix/current/msg06008.html (2011)
* I decided to follow IANA _text_ description from
* http://www.iana.org/assignments/ipfix/ipfix.xhtml (2013-09-18)
*
* Set proper bit for htonl later. */
if (ip4_opt_table[op])
ret |= 1 << (32 - ip4_opt_table[op]);
}
if (likely(i >= optsize || op == 0))
break;
else if (unlikely(op == 1))
continue;
else if (unlikely(p[i] < 2))
break;
else
i += p[i] - 1;
}
return ret;
}
#define TCPHDR_MAXSIZE (4 * 15)
/* List of options: http://www.iana.org/assignments/tcp-parameters/tcp-parameters.xhtml */
static inline __u32 tcp_options(const struct sk_buff *skb, const unsigned int ptr, const struct tcphdr *th)
{
const unsigned int optsize = th->doff * 4 - sizeof(struct tcphdr);
__u8 _opt[TCPHDR_MAXSIZE];
const u_int8_t *p;
__u32 ret;
unsigned int i;
p = skb_header_pointer(skb, ptr + sizeof(struct tcphdr), optsize, _opt);
if (unlikely(!p))
return 0;
ret = 0;
for (i = 0; likely(i < optsize); ) {
u_int8_t opt = p[i++];
if (likely(opt < 32)) {
/* IANA doc is messed up, see above. */
ret |= 1 << (32 - opt);
}
if (likely(i >= optsize || opt == 0))
break;
else if (unlikely(opt == 1))
continue;
else if (unlikely(p[i] < 2)) /* "silly options" */
break;
else
i += p[i] - 1;
}
return ret;
}
/* check if data region is in header boundary */
inline static int skb_in_header(const struct sk_buff *skb, const void *ptr, size_t off)
{
return ((unsigned char *)ptr + off) <= skb->data;
}
static inline int eth_p_vlan(__be16 eth_type)
{
return eth_type == htons(ETH_P_8021Q) ||
eth_type == htons(ETH_P_8021AD);
}
/* Extract all L2 header data, currently (in iptables) skb->data is
* pointing to network_header, so we use mac_header instead. */
/* Parse eth header, then vlans, then mpls. */
static void parse_l2_header(const struct sk_buff *skb, struct ipt_netflow_tuple *tuple)
{
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN) || defined(MPLS_DEPTH)
#define ENABLE_L2
unsigned char *mac_header = skb_mac_header(skb);
# if defined(ENABLE_VLAN) || defined(MPLS_DEPTH)
unsigned int hdr_depth;
__be16 proto;
# endif
# ifdef ENABLE_VLAN
int tag_num = 0;
/* get vlan tag that is saved in skb->vlan_tci */
if (vlan_tx_tag_present(skb))
tuple->tag[tag_num++] = htons(vlan_tx_tag_get(skb));
# endif
if (mac_header < skb->head ||
mac_header + ETH_HLEN > skb->data)
return;
# ifdef ENABLE_MAC
memcpy(&tuple->h_dst, eth_hdr(skb)->h_dest, ETH_ALEN);
memcpy(&tuple->h_src, eth_hdr(skb)->h_source, ETH_ALEN);
# endif
# if defined(ENABLE_VLAN) || defined(MPLS_DEPTH)
hdr_depth = ETH_HLEN;
proto = eth_hdr(skb)->h_proto;
if (eth_p_vlan(proto)) {
do {
const struct vlan_hdr *vh;
vh = (struct vlan_hdr *)(mac_header + hdr_depth);
if (!skb_in_header(skb, vh, VLAN_HLEN))
return;
proto = vh->h_vlan_encapsulated_proto;
# ifdef ENABLE_VLAN
if (tag_num < MAX_VLAN_TAGS)
tuple->tag[tag_num++] = vh->h_vlan_TCI;
# endif
hdr_depth += VLAN_HLEN;
} while (eth_p_vlan(proto));
}
# ifdef MPLS_DEPTH
if (eth_p_mpls(proto)) {
const struct mpls_label *mpls;
int label_num = 0;
do {
mpls = (struct mpls_label *)(mac_header + hdr_depth);
if (!skb_in_header(skb, mpls, MPLS_HLEN))
return;
if (label_num < MPLS_DEPTH)
tuple->mpls[label_num++] = mpls->entry;
hdr_depth += MPLS_HLEN;
} while (!(mpls->entry & htonl(MPLS_LS_S_MASK)));
}
# endif
# endif /* defined(ENABLE_VLAN) || defined(MPLS_DEPTH) */
#endif /* defined(ENABLE_MAC) || defined(ENABLE_VLAN) || defined(MPLS_DEPTH) */
}
/* packet receiver */
static unsigned int netflow_target(
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
struct sk_buff **pskb,
#else
struct sk_buff *skb,
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
const struct net_device *if_in,
const struct net_device *if_out,
unsigned int hooknum,
# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)
const struct xt_target *target,
# endif
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
const void *targinfo,
void *userinfo
# else
const void *targinfo
# endif
#else /* since 2.6.28 */
# define if_in xt_in(par)
# define if_out xt_out(par)
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
const struct xt_target_param *par
# else
const struct xt_action_param *par
# endif
#endif
)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
# ifndef ENABLE_L2
/* pskb_may_pull() may modify skb */
const
# endif
struct sk_buff *skb = *pskb;
#endif
union {
struct iphdr ip;
struct ipv6hdr ip6;
} _iph, *iph;
u_int32_t hash;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
const int family = target->family;
#else
# ifdef ENABLE_DIRECTION
const int hooknum = xt_hooknum(par);
# endif
const int family = xt_family(par);
#endif
struct ipt_netflow_tuple tuple;
struct ipt_netflow *nf;
__u8 tcp_flags;
#ifdef ENABLE_AGGR
struct netflow_aggr_n *aggr_n;
struct netflow_aggr_p *aggr_p;
#endif
__u8 s_mask, d_mask;
unsigned int ptr;
int fragment;
size_t pkt_len;
int options = 0;
int tcpoptions = 0;
struct stripe_entry *stripe;
if (unlikely(
#ifdef ENABLE_L2
/* to ensure that full L2 headers are present */
unlikely(!pskb_may_pull(skb, 0)) ||
#endif
!(iph = skb_header_pointer(skb, 0,
(likely(family == AF_INET))? sizeof(_iph.ip) : sizeof(_iph.ip6),
&iph)))) {
NETFLOW_STAT_INC(truncated);
NETFLOW_STAT_INC(pkt_drop);
NETFLOW_STAT_ADD(traf_drop, skb->len);
NETFLOW_STAT_TS(drop);
return IPT_CONTINUE;
}
memset(&tuple, 0, sizeof(tuple));
tuple.l3proto = family;
#ifdef ENABLE_PHYSDEV_OVER
if (skb->nf_bridge && skb->nf_bridge->physindev)
tuple.i_ifc = skb->nf_bridge->physindev->ifindex;
else /* FALLTHROUGH */
#endif
tuple.i_ifc = if_in? if_in->ifindex : -1;
tcp_flags = 0;
s_mask = 0;
d_mask = 0;
parse_l2_header(skb, &tuple);
if (likely(family == AF_INET)) {
tuple.src = (union nf_inet_addr){ .ip = iph->ip.saddr };
tuple.dst = (union nf_inet_addr){ .ip = iph->ip.daddr };
tuple.tos = iph->ip.tos;
tuple.protocol = iph->ip.protocol;
fragment = unlikely(iph->ip.frag_off & htons(IP_OFFSET));
ptr = iph->ip.ihl * 4;
pkt_len = ntohs(iph->ip.tot_len);
#define IPHDR_MAXSIZE (4 * 15)
if (unlikely(iph->ip.ihl * 4 > sizeof(struct iphdr))) {
u_int8_t _opt[IPHDR_MAXSIZE - sizeof(struct iphdr)];
const u_int8_t *op;
unsigned int optsize = iph->ip.ihl * 4 - sizeof(struct iphdr);
op = skb_header_pointer(skb, sizeof(struct iphdr), optsize, _opt);
if (likely(op))
options = ip4_options(op, optsize);
}
} else { /* AF_INET6 */
__u8 currenthdr;
tuple.src.in6 = iph->ip6.saddr;
tuple.dst.in6 = iph->ip6.daddr;
tuple.tos = iph->ip6.priority;
fragment = 0;
ptr = sizeof(struct ipv6hdr);
pkt_len = ntohs(iph->ip6.payload_len) + sizeof(struct ipv6hdr);
currenthdr = iph->ip6.nexthdr;
while (currenthdr != NEXTHDR_NONE && ipv6_ext_hdr(currenthdr)) {
struct ipv6_opt_hdr _hdr;
const struct ipv6_opt_hdr *hp;
unsigned int hdrlen = 0;
options |= observed_hdrs(currenthdr);
hp = skb_header_pointer(skb, ptr, sizeof(_hdr), &_hdr);
if (hp == NULL) {
/* We have src/dst, so must account something. */
tuple.protocol = currenthdr;
fragment = 3;
goto do_protocols;
}
switch (currenthdr) {
case IPPROTO_FRAGMENT: {
struct frag_hdr _fhdr;
const struct frag_hdr *fh;
fh = skb_header_pointer(skb, ptr, sizeof(_fhdr),
&_fhdr);
if (fh == NULL) {
tuple.protocol = currenthdr;
fragment = 2;
goto do_protocols;
}
fragment = 1;
#define FRA0 SetXBit(4) /* Fragment header - first fragment */
#define FRA1 SetXBit(6) /* Fragmentation header - not first fragment */
options |= (ntohs(fh->frag_off) & 0xFFF8)? FRA1 : FRA0;
hdrlen = 8;
break;
}
case IPPROTO_AH: {
struct ip_auth_hdr _ahdr, *ap;
if (likely(ap = skb_header_pointer(skb, ptr, 8, &_ahdr)))
SAVE_SPI(tuple, ap->spi);
hdrlen = (ap->hdrlen + 2) << 2;
break;
}
case IPPROTO_ESP:
/* After this header everything is encrypted. */
tuple.protocol = currenthdr;
goto do_protocols;
default:
hdrlen = ipv6_optlen(hp);
}
currenthdr = hp->nexthdr;
ptr += hdrlen;
}
tuple.protocol = currenthdr;
options |= observed_hdrs(currenthdr);
}
do_protocols:
if (fragment) {
/* if conntrack is enabled it should defrag on pre-routing and local-out */
NETFLOW_STAT_INC(frags);
} else {
switch (tuple.protocol) {
case IPPROTO_TCP: {
struct tcphdr _hdr, *hp;
if (likely(hp = skb_header_pointer(skb, ptr, 14, &_hdr))) {
tuple.s_port = hp->source;
tuple.d_port = hp->dest;
tcp_flags = (u_int8_t)(ntohl(tcp_flag_word(hp)) >> 16);
if (unlikely(hp->doff * 4 > sizeof(struct tcphdr)))
tcpoptions = tcp_options(skb, ptr, hp);
}
break;
}
case IPPROTO_UDP:
case IPPROTO_UDPLITE:
case IPPROTO_SCTP: {
struct udphdr _hdr, *hp;
if (likely(hp = skb_header_pointer(skb, ptr, 4, &_hdr))) {
tuple.s_port = hp->source;
tuple.d_port = hp->dest;
}
break;
}
case IPPROTO_ICMP: {
struct icmphdr _hdr, *hp;
if (likely(family == AF_INET) &&
likely(hp = skb_header_pointer(skb, ptr, 2, &_hdr)))
tuple.d_port = htons((hp->type << 8) | hp->code);
break;
}
case IPPROTO_ICMPV6: {
struct icmp6hdr _icmp6h, *ic;
if (likely(family == AF_INET6) &&
likely(ic = skb_header_pointer(skb, ptr, 2, &_icmp6h)))
tuple.d_port = htons((ic->icmp6_type << 8) | ic->icmp6_code);
break;
}
case IPPROTO_IGMP: {
struct igmphdr _hdr, *hp;
if (likely(hp = skb_header_pointer(skb, ptr, 1, &_hdr)))
tuple.d_port = hp->type;
break;
}
case IPPROTO_AH: { /* IPSEC */
struct ip_auth_hdr _hdr, *hp;
/* This is for IPv4 only. IPv6 it's parsed above. */
if (likely(family == AF_INET) &&
likely(hp = skb_header_pointer(skb, ptr, 8, &_hdr)))
SAVE_SPI(tuple, hp->spi);
break;
}
case IPPROTO_ESP: {
struct ip_esp_hdr _hdr, *hp;
/* This is for both IPv4 and IPv6. */
if (likely(hp = skb_header_pointer(skb, ptr, 4, &_hdr)))
SAVE_SPI(tuple, hp->spi);
break;
}
}
} /* not fragmented */
#ifdef ENABLE_AGGR
/* aggregate networks */
read_lock(&aggr_lock);
if (family == AF_INET) {
list_for_each_entry(aggr_n, &aggr_n_list, list)
if (unlikely((ntohl(tuple.src.ip) & aggr_n->mask) == aggr_n->addr)) {
tuple.src.ip &= htonl(aggr_n->aggr_mask);
s_mask = aggr_n->prefix;
atomic_inc(&aggr_n->usage);
break;
}
list_for_each_entry(aggr_n, &aggr_n_list, list)
if (unlikely((ntohl(tuple.dst.ip) & aggr_n->mask) == aggr_n->addr)) {
tuple.dst.ip &= htonl(aggr_n->aggr_mask);
d_mask = aggr_n->prefix;
atomic_inc(&aggr_n->usage);
break;
}
}
if (tuple.protocol == IPPROTO_TCP ||
tuple.protocol == IPPROTO_UDP ||
tuple.protocol == IPPROTO_SCTP ||
tuple.protocol == IPPROTO_UDPLITE) {
/* aggregate ports */
list_for_each_entry(aggr_p, &aggr_p_list, list)
if (unlikely(ntohs(tuple.s_port) >= aggr_p->port1 &&
ntohs(tuple.s_port) <= aggr_p->port2)) {
tuple.s_port = htons(aggr_p->aggr_port);
atomic_inc(&aggr_p->usage);
break;
}
list_for_each_entry(aggr_p, &aggr_p_list, list)
if (unlikely(ntohs(tuple.d_port) >= aggr_p->port1 &&
ntohs(tuple.d_port) <= aggr_p->port2)) {
tuple.d_port = htons(aggr_p->aggr_port);
atomic_inc(&aggr_p->usage);
break;
}
}
read_unlock(&aggr_lock);
#endif
#ifdef SAMPLING_HASH
hash = __hash_netflow(&tuple);
{
struct sampling hs = samp;
if (hs.mode == SAMPLER_HASH) {
NETFLOW_STAT_INC(pkts_observed);
if ((u32)(((u64)hash * hs.interval) >> 32))
return IPT_CONTINUE;
NETFLOW_STAT_INC(pkts_selected);
}
}
hash %= htable_size;
#else /* !SAMPLING_HASH */
hash = hash_netflow(&tuple);
#endif
read_lock(&htable_rwlock);
stripe = &htable_stripes[hash & LOCK_COUNT_MASK];
spin_lock(&stripe->lock);
/* record */
nf = ipt_netflow_find(&tuple, hash);
if (unlikely(!nf)) {
struct rtable *rt;
if (unlikely(maxflows > 0 && atomic_read(&ipt_netflow_count) >= maxflows)) {
/* This is DOS attack prevention */
NETFLOW_STAT_INC(maxflows_err);
NETFLOW_STAT_INC(pkt_drop);
NETFLOW_STAT_ADD(traf_drop, pkt_len);
NETFLOW_STAT_TS(drop);
goto unlock_return;
}
nf = ipt_netflow_alloc(&tuple);
if (unlikely(!nf || IS_ERR(nf))) {
NETFLOW_STAT_INC(alloc_err);
NETFLOW_STAT_INC(pkt_drop);
NETFLOW_STAT_ADD(traf_drop, pkt_len);
NETFLOW_STAT_TS(drop);
goto unlock_return;
}
hlist_add_head(&nf->hlist, &htable[hash]);
#ifdef ENABLE_SAMPLER
/* I only increment if deterministic sampler is enabled to
* avoid cache conflict by default. */
if (get_sampler_mode() == SAMPLER_DETERMINISTIC)
nf->sampler_count = atomic_inc_return(&flow_count);
#endif
nf->nf_ts_first = jiffies;
nf->tcp_flags = tcp_flags;
nf->o_ifc = if_out? if_out->ifindex : -1;
#ifdef ENABLE_PHYSDEV_OVER
if (skb->nf_bridge && skb->nf_bridge->physoutdev)
nf->o_ifc = skb->nf_bridge->physoutdev->ifindex;
#endif
#ifdef SNMP_RULES
rcu_read_lock();
#else
# define resolve_snmp(dev) ((dev)? (dev)->ifindex : -1)
#endif
/* copy and snmp-resolve device with physdev overriding normal dev */
#define copy_dev(out, physdev, dev) \
if (skb->nf_bridge && skb->nf_bridge->physdev) \
out = resolve_snmp(skb->nf_bridge->physdev); \
else \
out = resolve_snmp(dev);
#ifdef ENABLE_PHYSDEV
copy_dev(nf->o_ifphys, physoutdev, if_out);
copy_dev(nf->i_ifphys, physindev, if_in);
#endif
#ifdef SNMP_RULES
# ifdef ENABLE_PHYSDEV_OVER
copy_dev(nf->o_ifcr, physoutdev, if_out);
copy_dev(nf->i_ifcr, physindev, if_in);
# else
nf->o_ifcr = resolve_snmp(if_out);
nf->i_ifcr = resolve_snmp(if_in);
# endif
rcu_read_unlock();
#endif
nf->s_mask = s_mask;
nf->d_mask = d_mask;
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
nf->ethernetType = skb->protocol;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
rt = (struct rtable *)skb->dst;
#else /* since 2.6.26 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,31)
rt = skb->rtable;
#else /* since 2.6.31 */
rt = skb_rtable(skb);
#endif
#endif
#ifdef ENABLE_DIRECTION
nf->hooknumx = hooknum + 1;
#endif
if (likely(family == AF_INET)) {
if (rt)
nf->nh.ip = rt->rt_gateway;
} else {
if (rt)
nf->nh.in6 = ((struct rt6_info *)rt)->rt6i_gateway;
nf->flow_label = (iph->ip6.flow_lbl[0] << 16) |
(iph->ip6.flow_lbl[1] << 8) | (iph->ip6.flow_lbl[2]);
}
#if 0
if (unlikely(debug > 2))
printk(KERN_INFO "ipt_NETFLOW: new (%u) %hd:%hd SRC=%u.%u.%u.%u:%u DST=%u.%u.%u.%u:%u\n",
atomic_read(&ipt_netflow_count),
tuple.i_ifc, nf->o_ifc,
NIPQUAD(tuple.src.ip), ntohs(tuple.s_port),
NIPQUAD(tuple.dst.ip), ntohs(tuple.d_port));
#endif
}
nf->nr_packets++;
nf->nr_bytes += pkt_len;
nf->nf_ts_last = jiffies;
nf->tcp_flags |= tcp_flags;
nf->options |= options;
if (tuple.protocol == IPPROTO_TCP)
nf->tcpoptions |= tcpoptions;
NETFLOW_STAT_INC(pkt_total);
NETFLOW_STAT_ADD(traf_total, pkt_len);
#define LIST_IS_NULL(name) (!(name)->next)
if (unlikely(active_needs_export(nf, active_timeout * HZ, jiffies))) {
/* ok, if this is active flow to be exported */
#ifdef HAVE_LLIST
/* delete from hash and add to the export llist */
hlist_del(&nf->hlist);
if (!LIST_IS_NULL(&nf->flows_list))
list_del(&nf->flows_list);
llist_add(&nf->flows_llnode, &export_llist);
#else
/* bubble it to the tail */
if (LIST_IS_NULL(&nf->flows_list))
list_add_tail(&nf->flows_list, &stripe->list);
else
list_move_tail(&nf->flows_list, &stripe->list);
#endif
/* Blog: I thought about forcing timer to wake up sooner if we have
* enough exportable flows, but in fact this doesn't have much sense,
* because this would only move flow data from one memory to another
* (from our buffers to socket buffers, and socket buffers even have
* limited size). But yes, this is disputable. */
} else {
/* most recently accessed flows go to the head, old flows remain at the tail */
if (LIST_IS_NULL(&nf->flows_list))
list_add(&nf->flows_list, &stripe->list);
else
list_move(&nf->flows_list, &stripe->list);
}
unlock_return:
spin_unlock(&stripe->lock);
read_unlock(&htable_rwlock);
return IPT_CONTINUE;
}
#ifdef CONFIG_NF_NAT_NEEDED
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
/* Below 2.6.31 we don't need to handle callback chain manually. */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
#define NET_STRUCT struct net *net
#define NET_ARG net,
#define nf_conntrack_event_cb net->ct.nf_conntrack_event_cb
#else
#define NET_STRUCT void
#define NET_ARG
#endif
static int set_notifier_cb(NET_STRUCT)
{
struct nf_ct_event_notifier *notifier;
notifier = rcu_dereference(nf_conntrack_event_cb);
if (notifier == NULL) {
/* Polite mode. */
nf_conntrack_register_notifier(NET_ARG &ctnl_notifier);
} else if (notifier != &ctnl_notifier) {
if (!saved_event_cb)
saved_event_cb = notifier;
else if (saved_event_cb != notifier)
printk(KERN_ERR "natevents_net_init: %p != %p (report error.)\n",
saved_event_cb, notifier);
rcu_assign_pointer(nf_conntrack_event_cb, &ctnl_notifier);
} else
printk(KERN_ERR "ipt_NETFLOW: natevents already enabled.\n");
return 0;
}
static void unset_notifier_cb(NET_STRUCT)
{
struct nf_ct_event_notifier *notifier;
notifier = rcu_dereference(nf_conntrack_event_cb);
if (notifier == &ctnl_notifier) {
if (saved_event_cb == NULL)
nf_conntrack_unregister_notifier(NET_ARG &ctnl_notifier);
else
rcu_assign_pointer(nf_conntrack_event_cb, saved_event_cb);
} else
printk(KERN_ERR "ipt_NETFLOW: natevents already disabled.\n");
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
#undef nf_conntrack_event_cb
static struct pernet_operations natevents_net_ops = {
.init = set_notifier_cb,
.exit = unset_notifier_cb
};
#endif
#endif /* since 2.6.31 */
static DEFINE_MUTEX(events_lock);
/* Both functions may be called multiple times. */
static void register_ct_events(void)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
#define NETLINK_M "nf_conntrack_netlink"
struct module *netlink_m;
static int referenced = 0;
#endif
printk(KERN_INFO "ipt_NETFLOW: enable natevents.\n");
mutex_lock(&events_lock);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
/* Pre-load netlink module who will be first notifier
* user, and then hijack nf_conntrack_event_cb from it. */
if (
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)
!rcu_dereference(nf_conntrack_event_cb) ||
#endif
!(netlink_m = find_module(NETLINK_M))) {
printk("Loading " NETLINK_M "\n");
request_module(NETLINK_M);
}
/* Reference netlink module to prevent it's unsafe unload before us. */
if (!referenced && (netlink_m = find_module(NETLINK_M))) {
referenced++;
use_module(THIS_MODULE, netlink_m);
}
/* Register ct events callback. */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
register_pernet_subsys(&natevents_net_ops);
#else
set_notifier_cb();
#endif
#else /* below v2.6.31 */
if (!natevents && nf_conntrack_register_notifier(&ctnl_notifier) < 0)
printk(KERN_ERR "Can't register conntrack notifier, natevents disabled.\n");
else
#endif
natevents = 1;
mutex_unlock(&events_lock);
}
static void unregister_ct_events(void)
{
printk(KERN_INFO "ipt_NETFLOW: disable natevents.\n");
mutex_lock(&events_lock);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,31)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,2,0)
unregister_pernet_subsys(&natevents_net_ops);
#else /* < v3.2 */
unset_notifier_cb();
#endif /* v3.2 */
rcu_assign_pointer(saved_event_cb, NULL);
#else /* < v2.6.31 */
nf_conntrack_unregister_notifier(&ctnl_notifier);
#endif
natevents = 0;
mutex_unlock(&events_lock);
}
#endif /* CONFIG_NF_NAT_NEEDED */
static struct ipt_target ipt_netflow_reg[] __read_mostly = {
{
.name = "NETFLOW",
.target = netflow_target,
.checkentry = netflow_target_check,
.family = AF_INET,
.hooks =
(1 << NF_IP_PRE_ROUTING) |
(1 << NF_IP_LOCAL_IN) |
(1 << NF_IP_FORWARD) |
(1 << NF_IP_LOCAL_OUT) |
(1 << NF_IP_POST_ROUTING),
.me = THIS_MODULE
},
{
.name = "NETFLOW",
.target = netflow_target,
.checkentry = netflow_target_check,
.family = AF_INET6,
.hooks =
(1 << NF_IP_PRE_ROUTING) |
(1 << NF_IP_LOCAL_IN) |
(1 << NF_IP_FORWARD) |
(1 << NF_IP_LOCAL_OUT) |
(1 << NF_IP_POST_ROUTING),
.me = THIS_MODULE
},
};
#ifdef CONFIG_PROC_FS
static int register_stat(const char *name, struct file_operations *fops)
{
struct proc_dir_entry *proc_stat;
printk(KERN_INFO "netflow: registering: /proc/net/stat/%s\n", name);
# if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
proc_stat = create_proc_entry(name, S_IRUGO, INIT_NET(proc_net_stat));
# else
proc_stat = proc_create(name, S_IRUGO, INIT_NET(proc_net_stat), fops);
# endif
if (!proc_stat) {
printk(KERN_ERR "Unable to create /proc/net/stat/%s entry\n", name);
return 0;
}
# if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
proc_stat->proc_fops = fops;
# endif
# if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,30)
proc_stat->owner = THIS_MODULE;
# endif
printk(KERN_INFO "netflow: registered: /proc/net/stat/%s\n", name);
return 1;
}
#else
# define register_stat(x, y) 1
#endif
static int __init ipt_netflow_init(void)
{
int i;
printk(KERN_INFO "ipt_NETFLOW version %s, srcversion %s\n",
IPT_NETFLOW_VERSION, THIS_MODULE->srcversion);
version_string_size = scnprintf(version_string, sizeof(version_string),
"ipt_NETFLOW " IPT_NETFLOW_VERSION " %s", THIS_MODULE->srcversion);
tpl_element_sizes[observationDomainName] = version_string_size + 1;
start_ts.first = ktime_get_real();
clear_ipt_netflow_stat();
if (!hashsize) {
/* use 1/1024 of memory, 1M for hash table on 1G box */
unsigned long memksize = (num_physpages << PAGE_SHIFT) / 1024;
if (memksize > (5 * 1024 * 1024))
memksize = 5 * 1024 * 1024;
hashsize = memksize / sizeof(struct hlist_head);
}
if (hashsize < LOCK_COUNT)
hashsize = LOCK_COUNT;
printk(KERN_INFO "ipt_NETFLOW: hashsize %u (%luK)\n", hashsize,
hashsize * sizeof(struct hlist_head) / 1024);
htable_size = hashsize;
htable = alloc_hashtable(htable_size);
if (!htable) {
printk(KERN_ERR "Unable to create ipt_neflow_hash\n");
goto err;
}
#ifdef MPLS_DEPTH
/* template_mpls is terminated on the MPLS_DEPTH mark, so, it
* never send Element which can access mpls labels array above
* its defined MPLS_DEPTH value. */
if (MPLS_DEPTH >= 0 && MPLS_DEPTH < 10)
template_mpls.types[MPLS_LABELS_BASE_INDEX + MPLS_DEPTH] = 0;
#endif
for (i = 0; i < LOCK_COUNT; i++) {
spin_lock_init(&htable_stripes[i].lock);
INIT_LIST_HEAD(&htable_stripes[i].list);
}
ipt_netflow_cachep = kmem_cache_create("ipt_netflow",
sizeof(struct ipt_netflow), 0,
0, NULL
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
, NULL
#endif
);
if (!ipt_netflow_cachep) {
printk(KERN_ERR "Unable to create ipt_netflow slab cache\n");
goto err_free_hash;
}
if (!register_stat("ipt_netflow", &nf_seq_fops))
goto err_free_netflow_slab;
if (!register_stat("ipt_netflow_snmp", &snmp_seq_fops))
goto err_free_proc_stat1;
if (!register_stat("ipt_netflow_flows", &flows_seq_fops))
goto err_free_proc_stat2;
#ifdef CONFIG_SYSCTL
ctl_table_renumber(netflow_sysctl_table);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
netflow_sysctl_header = register_sysctl_table(netflow_net_table
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
, 0 /* insert_at_head */
#endif
);
#else /* 2.6.25 */
netflow_sysctl_header = register_sysctl_paths(netflow_sysctl_path, netflow_sysctl_table);
#endif
if (!netflow_sysctl_header) {
printk(KERN_ERR "netflow: can't register to sysctl\n");
goto err_free_proc_stat3;
} else
printk(KERN_INFO "netflow: registered: sysctl net.netflow\n");
#endif
if (!destination)
destination = destination_buf;
if (destination != destination_buf) {
strlcpy(destination_buf, destination, sizeof(destination_buf));
destination = destination_buf;
}
if (add_destinations(destination) < 0)
goto err_free_sysctl;
#ifdef ENABLE_AGGR
if (!aggregation)
aggregation = aggregation_buf;
if (aggregation != aggregation_buf) {
strlcpy(aggregation_buf, aggregation, sizeof(aggregation_buf));
aggregation = aggregation_buf;
}
add_aggregation(aggregation);
#endif
#ifdef ENABLE_SAMPLER
if (!sampler)
sampler = sampler_buf;
if (sampler != sampler_buf) {
strlcpy(sampler_buf, sampler, sizeof(sampler_buf));
sampler = sampler_buf;
}
parse_sampler(sampler);
#ifdef SAMPLING_HASH
hash_seed = prandom_u32();
#endif
#endif
#ifdef SNMP_RULES
if (!snmp_rules)
snmp_rules = snmp_rules_buf;
if (snmp_rules != snmp_rules_buf) {
strlcpy(snmp_rules_buf, snmp_rules, sizeof(snmp_rules_buf));
snmp_rules = snmp_rules_buf;
}
add_snmp_rules(snmp_rules);
#endif
#ifdef ENABLE_PROMISC
{
int newpromisc = promisc;
promisc = 0;
switch_promisc(newpromisc);
}
#endif
netflow_switch_version(protocol);
_schedule_scan_worker(0);
setup_timer(&rate_timer, rate_timer_calc, 0);
mod_timer(&rate_timer, jiffies + (HZ * SAMPLERATE));
peakflows_at = jiffies;
if (xt_register_targets(ipt_netflow_reg, ARRAY_SIZE(ipt_netflow_reg)))
goto err_stop_timer;
#ifdef CONFIG_NF_NAT_NEEDED
if (natevents)
register_ct_events();
#endif
printk(KERN_INFO "ipt_NETFLOW is loaded.\n");
return 0;
err_stop_timer:
_unschedule_scan_worker();
netflow_scan_and_export(AND_FLUSH);
del_timer_sync(&rate_timer);
free_templates();
destination_removeall();
#ifdef ENABLE_AGGR
aggregation_remove(&aggr_n_list);
aggregation_remove(&aggr_p_list);
#endif
err_free_sysctl:
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(netflow_sysctl_header);
#endif
err_free_proc_stat3:
#ifdef CONFIG_PROC_FS
remove_proc_entry("ipt_netflow_flows", INIT_NET(proc_net_stat));
err_free_proc_stat2:
remove_proc_entry("ipt_netflow_snmp", INIT_NET(proc_net_stat));
err_free_proc_stat1:
remove_proc_entry("ipt_netflow", INIT_NET(proc_net_stat));
err_free_netflow_slab:
#endif
kmem_cache_destroy(ipt_netflow_cachep);
err_free_hash:
vfree(htable);
err:
printk(KERN_INFO "ipt_NETFLOW is not loaded.\n");
return -ENOMEM;
}
static void __exit ipt_netflow_fini(void)
{
printk(KERN_INFO "ipt_NETFLOW unloading..\n");
#ifdef CONFIG_SYSCTL
unregister_sysctl_table(netflow_sysctl_header);
#endif
#ifdef CONFIG_PROC_FS
remove_proc_entry("ipt_netflow_flows", INIT_NET(proc_net_stat));
remove_proc_entry("ipt_netflow_snmp", INIT_NET(proc_net_stat));
remove_proc_entry("ipt_netflow", INIT_NET(proc_net_stat));
#endif
#ifdef ENABLE_PROMISC
switch_promisc(0);
#endif
xt_unregister_targets(ipt_netflow_reg, ARRAY_SIZE(ipt_netflow_reg));
#ifdef CONFIG_NF_NAT_NEEDED
if (natevents)
unregister_ct_events();
#endif
_unschedule_scan_worker();
netflow_scan_and_export(AND_FLUSH);
del_timer_sync(&rate_timer);
synchronize_sched();
free_templates();
destination_removeall();
#ifdef ENABLE_AGGR
aggregation_remove(&aggr_n_list);
aggregation_remove(&aggr_p_list);
#endif
#ifdef SNMP_RULES
kfree(snmp_ruleset);
#endif
kmem_cache_destroy(ipt_netflow_cachep);
vfree(htable);
printk(KERN_INFO "ipt_NETFLOW unloaded.\n");
}
module_init(ipt_netflow_init);
module_exit(ipt_netflow_fini);
/* vim: set sw=8: */
ipt-netflow-2.2/raw_promisc.patch 0000644 0000000 0000000 00000001476 13213006644 015700 0 ustar root root
This simple hack will allow to see promisc traffic in raw table of
iptables. Of course you will need to enable promisc on the interface.
Refer to README.promisc for details.
Example how to catch desired traffic:
iptables -A PREROUTING -t raw -i eth2 -j NETFLOW
--- linux-2.6.26/net/ipv4/ip_input.old.c 2008-07-14 01:51:29.000000000 +0400
+++ linux-2.6.26/net/ipv4/ip_input.c 2008-08-06 14:02:16.000000000 +0400
@@ -378,12 +378,6 @@
struct iphdr *iph;
u32 len;
- /* When the interface is in promisc. mode, drop all the crap
- * that it receives, do not try to analyse it.
- */
- if (skb->pkt_type == PACKET_OTHERHOST)
- goto drop;
-
IP_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
ipt-netflow-2.2/testing.sh 0000755 0000000 0000000 00000001717 13213006644 014344 0 ustar root root #!/bin/bash
set -e
if [ "$1" = "" ]; then
echo Maintainer only tool.
exit 1
elif [ "$1" = all ]; then
exec bash $0 linux-2.6.18 centos5 linux-3.11.2 centos6 linux-3.4.66 linux-3.9.11 centos7 linux-3.14 linux-3.17 linux-3.19
exit 1
fi
smilint IPT-NETFLOW-MIB.my
cfg=()
echo -n Testing for:
for k in "$@"; do
if [ ! -d /usr/src/$k ]; then continue; fi
echo -n " $k"
cfg+=("./configure --kdir=/usr/src/$k")
done
echo
readarray -t opts <<EOF
--disable-snmp-agent
--enable-aggregation
--enable-natevents
--enable-snmp-rules
--enable-macaddress
--enable-vlan
--promisc-mpls
--enable-direction
--enable-sampler
--enable-sampler=hash
--enable-promisc --promisc-mpls
--enable-physdev
--enable-physdev-override
EOF
if [ "$SHORT" ]; then
opts=("$SHORT")
fi
colorecho() {
echo -e "\033[1;32m$@\033[m"
}
for i in "${cfg[@]}"; do
for j in "${opts[@]}"; do
echo
colorecho == $i $j
echo
$i $j -Werror
make
done
done
ipt-netflow-2.2/NEWS 0000644 0000000 0000000 00000005527 13213006644 013032 0 ustar root root ipt-netflow NEWS
================
2.2 (2016-02-21)
* Minor feature and Maintenance release.
- Decapsulate MPLS in promisc mode and MPLS-aware NetFlow feature.
- Export flowEndReason for IPFIX.
- Promics mode improvements.
- Allow export destination to be IPv6 address.
- Move flows list from debugfs to proc.
- Compilation compatibility with latest kernels.
- Code is Coverity scanned.
2.1 (2014-02-08)
* Options Templates support (V9 and IPFIX). Which let to implement:
- Flow Sampling (random, deterministic, and hash modes) for all types
of NetFlow protocols (V5, V9, IPFIX).
- Export Statistics (metering, exporting, sampling) and Configuration.
- Export Interface list (ifName, ifDescr).
* Promisc hack (no need to patch kernel anymore).
* SNMP monitoring interface and agent (via net-snmp dlmod).
* More compilation compatibility with recent kernels, grsecurity kernels,
Gentoo, Debian, Centos. DKMS install support.
* Minor features: IPSec flows, Direction Element. Removed support for
CONNMARK. Bug fixes and improvements.
* irqtop tool (ruby).
2.0.1 (2014-09-04)
* Minor fixes for 2.0 release.
2.0 (2014-08-07)
* This is major release with a lot of new features and improvements, such
as:
- Support of NetFlow v9 and IPFIX.
- IPv6 support.
- NAT translation events (NEL).
- Additional options is SNMP-index translation rules, Ethernet Type,
VLAN, and MAC addresses exporting.
- Performance improvements (tested to work well on 10Gbit load).
- Stability improvements and bug fixes.
1.8 (2012-07-02)
* This is minor bug fix release with small improvements.
1.7.1 (2011-04-04)
* This is minor release with improved compilation compatibility and small
improvements.
1.7 (2011-01-30)
* This version have improved compilation compatibility with latest Linux
kernels (2.6.36.3 and 2.6.27) and bunch of small improvements.
* Since version 1.7 ipt-netflow's repository moved to Git SCM. Use of CVS
repository is deprecated.
1.5.1 (2009-03-14)
* This version have improved compliance to NetFlow standard and
compatibility with iptables/xtables 1.4.x. Added options to configure
script for manual customization.
1.4 (2008-12-23)
* This version have restored compatibility with popular kernel 2.6.18,
added configure script, statistics improvements, some fixes for 64-bit
platforms, and minor performance tune up.
1.2 (2008-11-15)
* This version have stability enhancements, documentation improvements, IP
frag support, better statistics.
1.1 (2008-08-06)
* This version updated compatibility with latest (2.6.26) Linux kernel, have
more support for promisc patch, and minor fixes.
1.0 (2008-07-12)
* First release tested in production environment.
ipt-netflow-2.2/libipt_NETFLOW.c 0000644 0000000 0000000 00000005007 13213006644 015151 0 ustar root root /*
* iptables helper for NETFLOW target
* <abc@telekom.ru>
*
*
* This file is part of NetFlow exporting module.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <net/if.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define __EXPORTED_HEADERS__
#ifdef XTABLES
#include <xtables.h>
#else
#include <iptables.h>
#endif
#ifdef XTABLES_VERSION_CODE // since 1.4.1
#define MOD140
#define iptables_target xtables_target
#endif
#ifdef iptables_target // only in 1.4.0
#define MOD140
#endif
#ifdef MOD140
#define ipt_entry_target xt_entry_target
#define register_target xtables_register_target
#define _IPT_ENTRY void
#define _IPT_IP void
#ifndef IPT_ALIGN
#define IPT_ALIGN XT_ALIGN
#endif
#else // before 1.3.x
#define _IPT_ENTRY struct ipt_entry
#define _IPT_IP struct ipt_ip
#endif
#ifndef IPTABLES_VERSION
#define IPTABLES_VERSION XTABLES_VERSION
#endif
static struct option opts[] = {
{ 0 }
};
static void help(void)
{
printf("NETFLOW target\n");
}
static int parse(int c, char **argv, int invert, unsigned int *flags,
const _IPT_ENTRY *entry,
struct ipt_entry_target **targetinfo)
{
return 1;
}
static void final_check(unsigned int flags)
{
}
static void save(const _IPT_IP *ip, const struct ipt_entry_target *match)
{
}
static void print(const _IPT_IP *ip,
const struct ipt_entry_target *target,
int numeric)
{
printf("NETFLOW ");
}
static struct iptables_target netflow = {
.next = NULL,
.name = "NETFLOW",
.version = IPTABLES_VERSION,
.size = IPT_ALIGN(0),
.userspacesize = IPT_ALIGN(0),
.help = &help,
.parse = &parse,
.final_check = &final_check,
.print = &print,
.save = &save,
.extra_opts = opts
};
#ifndef _init
#define _init __attribute__((constructor)) _INIT
#endif
void _init(void)
{
register_target(&netflow);
}
ipt-netflow-2.2/configure 0000755 0000000 0000000 00000043175 13213006644 014243 0 ustar root root #!/bin/sh
PATH=$PATH:/bin:/usr/bin:/usr/sbin:/sbin:/usr/local/sbin
case "$1" in
--from-dkms-conf*)
KDKMS=`echo "$1" | sed 's/[^=]*.//'`
# restore options from existing Makefile, if present
if [ -e Makefile ]; then
set -- `sed -n 's/^CARGS = \(.*\)/\1/p' Makefile`
FROMDKMSCONF=1
fi
;;
esac
error() {
printf "! Error: $*\n"
exit 1
}
iptables_src_version() {
test "$IPTSRC" || return 1
echo -n "Checking iptables sources version: "
SRC="$IPTSRC/Makefile"
test -s "$SRC" || error "Please build iptables first."
VER=`sed -n 's/^\(IPTABLES_\)\?VERSION[ :]= \?//p' "$SRC"`
test "$VER" || error "Unknown version of iptables."
if [ "$VER" = "$IPTVER" ]; then
echo "$VER (ok)"
else
echo "$VER"
error "Source version ($VER) doesn't match binary ($IPTVER)"
fi
}
get_lib_dir() {
test -s "$1" && LIB=`sed -n 's/.*_LIB_DIR "\(.*\)"/\1/p' "$1"`
if [ "$LIB" ]; then
IPTLIB=$LIB
echo "$IPTLIB (from sources)"
return 0
fi
return 1
}
get_lib_from_bin() {
LIB=`strings $IPTBIN | grep ^/.*lib.*/.*tables`
if [ "$LIB" ]; then
IPTLIB=$LIB
echo "$IPTLIB (from binary)"
return 0
fi
return 1
}
get_lib_from_lib() {
XLIB=`/usr/bin/ldd $IPTBIN | grep libxtables | sed -n 's!.* \(/[^ ]\+\).*!\1!p'`
test "$XLIB" || return 1
LIB=`strings $XLIB | grep ^/.*lib.*/.*tables`
if [ "$LIB" ]; then
IPTLIB=$LIB
echo "$IPTLIB (from libxtables.so, from binary)"
return 0
fi
return 1
}
iptables_inc() {
echo -n "Iptables include flags: "
if [ "$IPTINC" ]; then
echo "$IPTINC (user specified)"
elif [ "$PKGVER" ]; then
IPTINC="$PKGINC"
echo "$IPTINC (pkg-config)"
elif [ "$NOIPTSRC" ]; then
IPTINC=
echo "none (default)"
else
IPTINC="$IPTSRC/include"
IPTINC="-I$IPTINC"
echo "$IPTINC (from source)"
fi
}
iptables_modules() {
echo -n "Iptables module path: "
if [ "$IPTLIB" ]; then
echo "$IPTLIB (user specified)"
else
if [ "$PKGLIB" ]; then
IPTLIB="$PKGLIB"
echo "$IPTLIB (pkg-config)"
else
get_lib_dir "$IPTSRC/include/iptables.h" && return 0
get_lib_dir "$IPTSRC/include/xtables.h" && return 0
get_lib_dir "$IPTSRC/xtables/internal.h" && return 0
get_lib_from_bin && return 0
get_lib_from_lib && return 0
error "can not find, try setting it with --ipt-lib="
fi
fi
}
try_dir() {
if [ -d "$1/include" ]; then
echo "Found iptables sources at $1"
IPTSRC=$1
return 0
fi
return 1
}
try_dirg() {
try_dir "$1" && return 0
try_dir "$1.git" && return 0
}
try_dir2() {
test -d "$1" && try_dir `dirname $1` && return 0
}
check_pkg_config() {
test "$PKGWARN" && return 1
if ! which pkg-config >/dev/null 2>&1; then
echo "! You don't have pkg-config, it may be useful to install it."
PKGWARN=1
return 1
fi
return 0
}
iptables_find_version() {
echo -n "Iptables binary version: "
if [ "$IPTVER" ]; then
echo "$IPTVER (user specified)"
else
IPTVER=`$IPTBIN -V 2>/dev/null | sed -n s/iptables.v//p`
if [ "$IPTVER" ]; then
echo "$IPTVER (detected from $IPTBIN)"
return
else
echo "no iptables binary found"
fi
check_pkg_config
PKGVER=`pkg-config --modversion xtables 2>/dev/null`
if [ "$PKGVER" ]; then
IPTVER="$PKGVER"
echo "Xtables version: $IPTVER (detected from `which pkg-config`)"
return
fi
error "Can not find iptables version, try setting it with --ipt-ver="
fi
}
compiler_presence_test() {
echo -n "Check for working gcc: "
$CC -v >/dev/null 2>&1
if [ $? = 0 ]; then
echo Yes "($CC)"
else
echo No
echo "! You need gcc to install module from source"
if [ -s /etc/debian_version ]; then
NAME=Debian
if [ -e /etc/os-release ]; then
. /etc/os-release >/dev/null 2>&1
fi
echo "! "
echo "! Under $NAME try to run this:"
echo "! root# apt-get install gcc"
echo "! "
elif [ -s /etc/redhat-release ]; then
echo "! "
echo "! Under Centos try to run this:"
echo "! root# yum install gcc"
echo "! "
fi
exit 1
fi
}
compile_libitp_test() {
local FLAGS
local MSG
echo -n "Checking for presence of $@... "
if [ "$IPTINC" ]; then
FLAGS=$IPTINC
MSG="(using ipt-inc)"
elif [ "$PKGINC" ]; then
FLAGS=$PKGINC
MSG="(using pkg-config)"
else
FLAGS=
MSG=
fi
echo "
#define __EXPORTED_HEADERS__
#include <$*>" > test.c
$CC -c test.c $FLAGS >/dev/null 2>&1
RET=$?
if [ $RET = 0 ]; then
echo Yes $MSG;
else
echo No;
fi
rm -f test.c test.o
return $RET
}
iptables_try_pkgconfig() {
if [ ! "$PKGVER" ]; then
check_pkg_config
PKGVER=`pkg-config --modversion xtables 2>/dev/null`
TRYPKGVER=`pkg-config --modversion xtables 2>/dev/null`
echo -n "pkg-config for version $IPTVER exists: "
pkg-config --exact-version=$IPTVER xtables 2>/dev/null
if [ $? = 0 ]; then
echo "Yes"
PKGVER=$TRYPKGVER
else
if [ "$TRYPKGVER" ]; then
echo "No (reported: $TRYPKGVER)"
else
echo "No"
fi
PKGVER=
fi
fi
if [ "$PKGVER" ]; then
check_pkg_config
PKGVER=`pkg-config --modversion xtables 2>/dev/null`
PKGINC=`pkg-config --cflags xtables`
PKGLIB=`pkg-config --variable=xtlibdir xtables`
elif expr "$IPTVER" : '^1\.3' >/dev/null; then
echo "! This version of iptables ($IPTVER) will be treated as old version."
# Newer versions of iptables should not have -I/kernel/include!
# So I assume that newer version will have correct pkg-config set up
# and if not, then it's older who need it.
IPTCFLAGS="-I$KDIR/include -DIPTABLES_VERSION=\\\\\"$IPTVER\\\\\""
fi
compiler_presence_test
if compile_libitp_test xtables.h; then
IPTCFLAGS="-DXTABLES $IPTCFLAGS"
elif ! compile_libitp_test iptables.h; then
echo "! Iptables headers not found. You may need to specify --ipt-inc=..."
if [ -s /etc/debian_version ]; then
echo "! "
echo "! Under Debian simply run this:"
echo "! root# apt-get install iptables-dev pkg-config"
elif [ -s /etc/redhat-release ]; then
echo "! "
arch=.`uname -m`
echo "! Under Centos simply run this:"
echo "! root# yum install iptables-devel$arch pkgconfig"
fi
exit 1
fi
}
iptables_find_src() {
test "$IPTINC" && return 1
test "$PKGVER" && return 1
VER="iptables-$IPTVER"
if [ "$IPTSRC" ]; then
echo "User specified source directory: $IPTSRC"
try_dir $IPTSRC || error "Specified directory is not iptables source.."
else
echo "Searching for $VER sources.."
try_dir "./$VER" && return 0
try_dir "../$VER" && return 0
try_dir "/usr/src/$VER" && return 0
try_dirg "iptables" && return 0
try_dirg "../iptables" && return 0
try_dirg "/usr/src/iptables" && return 0
try_dir2 `locate $VER/extensions 2>/dev/null | head -1` && return 0
echo "! Can not find iptables source directory, you may try setting it with --ipt-src="
echo "! This is not fatal error, yet. Will be just using default include dir."
NOIPTSRC=1
fi
}
show_help() {
echo "Possible options:"
echo " --ipt-ver=.. iptables version (ex.: 1.4.2)"
echo " --ipt-bin=.. iptables binary to use (ex.: /usr/sbin/iptables)"
echo " --ipt-src=.. directory for iptable source (ex.: ../iptables-1.4.2)"
echo " --ipt-lib=.. iptable modules path (ex.: /usr/libexec/xtables)"
echo " --ipt-inc=.. directory for iptable headers (ex.: /usr/include)"
echo " --kver=.. kernel version (ex.: 2.6.30-std-def-alt15)"
echo " --kdir=.. directory for kernel source (ex.: /usr/src/kernel)"
echo " --enable-natevents enables natevents support"
echo " --enable-snmp-rules enables SNMP-index conversion rules"
echo " --enable-macaddress enables MAC address for v9/IPFIX"
echo " --enable-vlan enables VLAN Ids for v9/IPFIX"
echo " --enable-direction enables flowDirection(61) Element"
echo " --enable-sampler enables Flow Sampling"
echo " --enable-sampler=hash enables Hash sampler"
echo " --enable-aggregation enables aggregation rules"
echo " --enable-promisc enables promisc hack mode"
echo " --promisc-mpls decapsulate MPLS in promisc mode"
echo " --promisc-mpls=N -- and record N labels (default 3)"
echo " --enable-physdev enables physdev reporting"
echo " --enable-physdev-override to override interfaces"
echo " --disable-snmp-agent disables net-snmp agent"
echo " --disable-dkms disables DKMS support completely"
echo " --disable-dkms-install no DKMS install but still create dkms.conf"
exit 0
}
CARGS="$@"
for ac_option
do
case "$ac_option" in
-*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
*) ac_optarg= ;;
esac
case "$ac_option" in
--ipt-bin=*) IPTBIN="$ac_optarg" ;;
--ipt-lib=*) IPTLIB="$ac_optarg" ;;
--ipt-src=*) IPTSRC="$ac_optarg" ;;
--ipt-ver=*) IPTVER="$ac_optarg" ;;
--ipt-inc=*) IPTINC="-I$ac_optarg" ;;
--kver=*) KVERSION="$ac_optarg" ;;
--kdir=*) KDIR="$ac_optarg" ;;
--enable-nat*) KOPTS="$KOPTS -DENABLE_NAT" ;;
--enable-mac*) KOPTS="$KOPTS -DENABLE_MAC" ;;
--enable-vlan*) KOPTS="$KOPTS -DENABLE_VLAN" ;;
--enable-direc*) KOPTS="$KOPTS -DENABLE_DIRECTION" ;;
--enable-sampl*hash) KOPTS="$KOPTS -DENABLE_SAMPLER -DSAMPLING_HASH" ;;
--enable-sampl*) KOPTS="$KOPTS -DENABLE_SAMPLER" ;;
--enable-aggr*) KOPTS="$KOPTS -DENABLE_AGGR" ;;
--enable-promi*) ENABLE_PROMISC=1 ;;
--promisc-mpls*) ENABLE_PROMISC=1; PROMISC_MPLS=1; MPLS_DEPTH=${ac_optarg:-3} ;;
--enable-snmp-r*) KOPTS="$KOPTS -DSNMP_RULES" ;;
--enable-physdev) KOPTS="$KOPTS -DENABLE_PHYSDEV" ;;
--enable-physdev-over*) KOPTS="$KOPTS -DENABLE_PHYSDEV_OVER" ;;
--disable-snmp-a*) SKIPSNMP=1 ;;
--disable-net-snmp*) SKIPSNMP=1 ;;
--disable-dkms*) SKIPDKMS=1 ;;
--from-dkms-conf*) ;;
--make) echo called from make; CARGS=`echo $CARGS | sed s/--make//g` ;;
-Werror) KOPTS="$KOPTS -Werror" ;;
--help|-h) show_help ;;
-*) echo Invalid option: $ac_option; exit 1 ;;
# *) ni="$ni $ac_option" ;;
esac
done
if [ "$ENABLE_PROMISC" = 1 ]; then KOPTS="$KOPTS -DENABLE_PROMISC"; fi
if [ "$PROMISC_MPLS" = 1 ]; then
KOPTS="$KOPTS -DPROMISC_MPLS"
case "$MPLS_DEPTH" in (*[!0-9]*|"") MPLS_DEPTH=1 ;; esac
if [ "$MPLS_DEPTH" -lt 1 ]; then
echo "! Requested MPLS stack depth is too small, limiting to 1."
elif [ "$MPLS_DEPTH" -gt 10 ]; then
echo "! Requested MPLS stack depth is too big, limiting to 10."
MPLS_DEPTH=10;
fi
if [ "$MPLS_DEPTH" -ge 1 ]; then KOPTS="$KOPTS -DMPLS_DEPTH=$MPLS_DEPTH"; fi
fi
kernel_find_version() {
KHOW=requested
test "$KVERSION" && return 0
if grep -q '#.*Debian' /proc/version; then
KHOW=proc
KVERSION=`sed -n 's/.*#.*Debian \([0-9\.]\+\)-.*/\1/p' /proc/version`
KLIBMOD=`uname -r`
else
KHOW=uname
KVERSION=`uname -r`
fi
test "$KDIR" || return 0
test -s $KDIR/Makefile || return 1
test -s $KDIR/include/config/kernel.release || return 1
KVERSION=`cat $KDIR/include/config/kernel.release`
KHOW=sources
}
kernel_check_src() {
if [ -s "$1/Makefile" ]; then
KDIR="$1"
return 0
fi
return 1
}
kernel_check_src2() {
if kernel_check_src $1/source; then
KSRC=$KDIR
fi
kernel_check_src $1/build
}
kernel_find_source() {
if [ "$KDKMS" ]; then
# dkms args is highest priority
KDIR=$KDKMS
KSHOW=dkms
return 0
fi
KSHOW=requested
test "$KDIR" && return 0
KSHOW=found
kernel_check_src2 /lib/modules/$KLIBMOD && return 0
kernel_check_src2 /lib/modules/$KVERSION && return 0
kernel_check_src /usr/src/kernels/$KVERSION && return 0
kernel_check_src /usr/src/linux-$KVERSION && return 0
echo "! Linux source not found. Don't panic. You may specify kernel source"
echo "! directory with --kdir=..., or try to install kernel-devel package,"
echo "! or just raw sources for linux-$KVERSION from kernel.org."
if grep -q -i centos /proc/version 2>/dev/null; then
echo "! "
arch=.`uname -m`
echo "! Under Centos simply run this:"
echo "! root# yum install kernel-devel iptables-devel$arch pkgconfig"
fi
if grep -q -i debian /proc/version 2>/dev/null; then
echo "! "
echo "! Under Debian simply run this:"
echo "! root# apt-get install module-assistant iptables-dev pkg-config"
echo "! root# m-a prepare"
fi
exit 1
}
kernel_check_consistency() {
if [ -s $KDIR/include/config/kernel.release ]; then
SRCVER=`cat $KDIR/include/config/kernel.release`
if [ "$KVERSION" != "$SRCVER" ]; then
echo "! Warning: $KHOW kernel version ($KVERSION) and $KSHOW version of kernel source ($SRCVER) doesn't match!"
echo "! You may try to specify only kernel source tree with --kdir=$KDIR"
echo "! and configure will pick up version properly."
echo "! Assuming you want to build for $SRCVER"
KVERSION=$SRCVER
fi
fi
test -e "$KDIR/.config" || error ".config in kernel source not found, run make menuconfig in $KDIR"
test -d "$KDIR/include/config" || error "kernel is not prepared, run make prepare modules_prepare in $KDIR"
}
kconfig() {
KCONFIG=$KDIR/.config
if ! grep -q "^$1=" $KCONFIG 2>/dev/null; then
if [ "$KCONFIGREPORTED" != true ]; then
KCONFIGREPORTED=true
echo Kernel config file checked: $KCONFIG
echo
fi
echo "! Attention: $1 is undefined in your kernel configuration"
echo "! Without this option enabled $2 will not work."
echo
fi
}
kernel_check_config() {
kconfig CONFIG_SYSCTL "sysctl interface"
kconfig CONFIG_PROC_FS "proc interface"
kconfig CONFIG_NF_NAT_NEEDED "natevents"
kconfig CONFIG_NF_CONNTRACK_EVENTS "natevents"
kconfig CONFIG_IPV6 "IPv6"
kconfig CONFIG_IP6_NF_IPTABLES "ip6tables target"
}
kernel_check_include() {
echo -n "Checking for presence of $1... "
if [ "$KSRC" -a -e $KSRC/$1 ]; then
echo Yes
KOPTS="$KOPTS $2"
elif [ -e $KDIR/$1 ]; then
echo Yes
KOPTS="$KOPTS $2"
else
echo No
fi
}
kernel_check_features() {
kernel_check_include include/linux/llist.h -DHAVE_LLIST
kernel_check_include include/linux/grsecurity.h -DHAVE_GRSECURITY_H
}
snmp_check() {
SNMPTARGET=
SNMPINSTALL=
test "$SKIPSNMP" && return
echo -n "Searching for net-snmp-config... "
if which net-snmp-config >/dev/null 2>&1; then
echo Yes `which net-snmp-config`
else
echo No.
SNMPCONFIG=no
fi
echo -n "Searching for net-snmp agent... "
if [ -s /etc/redhat-release ]; then
if ! rpm --quiet -q net-snmp; then
echo No.
SNMPADD="do: yum install net-snmp"
if [ "$SNMPCONFIG" ]; then
SNMPADD="$SNMPADD net-snmp-devel"
fi
else
echo Yes.
fi
if [ "$SNMPCONFIG" ]; then
SNMPCONFIG="run: yum install net-snmp-devel"
fi
elif [ -s /etc/debian_version ]; then
if ! dpkg -s snmpd >/dev/null 2>&1; then
echo No.
SNMPADD="do: apt-get install snmpd"
if [ "$SNMPCONFIG" ]; then
SNMPADD="$SNMPADD libsnmp-dev"
fi
else
echo Yes.
fi
if [ "$SNMPCONFIG" ]; then
SNMPCONFIG="run: apt-get install libsnmp-dev"
fi
elif [ -s /etc/snmp/snmpd.conf ]; then
echo Yes.
else
echo No.
SNMPADD="install net-snmp (www.net-snmp.org)"
SNMPCONFIG="reinstall net-snmp with agent support."
fi
if [ "$SNMPADD" ]; then
echo " Assuming you don't want net-snmp agent support".
echo " Otherwise $SNMPADD"
return
elif [ "$SNMPCONFIG" ]; then
echo "! You have net-snmp agent but not development package."
echo "! net-snmp agent will not be built, to fix:"
echo "! $SNMPCONFIG"
return
fi
SNMPTARGET=snmp_NETFLOW.so
SNMPINSTALL=sinstall
}
dkms_check() {
DKMSINSTALL=
test "$SKIPDKMS" && return
echo -n "Checking for DKMS... "
if ! which dkms >/dev/null 2>&1; then
echo "No. (It may be useful to install it.)"
echo "! "
echo "! DKMS is method of installing kernel modules, that will"
echo "! automatically recompile module after kernel upgrade."
if [ -s /etc/debian_version ]; then
echo "! "
echo "! To install it under Debian simply run this:"
echo "! root# apt-get install dkms"
echo "! "
elif [ -s /etc/redhat-release ]; then
echo "! "
echo "! To install it under Centos enable EPEL or RPMforge repository,"
echo "! then run this:"
echo "! root# yum install dkms"
echo "! "
fi
return
fi
echo Yes.
DKMSINSTALL=dinstall
test "$FROMDKMSCONF" && return
if dkms status | grep ^ipt-netflow, >/dev/null; then
echo "! You are already have module installed via DKMS"
echo "! it will be uninstalled on 'make install' and"
echo "! current version of module installed afterwards."
echo "! Use --disable-dkms option if don't want this."
fi
}
kernel_find_version #KVERSION
test "$KLIBMOD" || KLIBMOD=$KVERSION
echo "Kernel version: $KVERSION ($KHOW)"
kernel_find_source #KDIR
echo "Kernel sources: $KDIR ($KSHOW)"
kernel_check_consistency
kernel_check_config
kernel_check_features
CC=${CC:-gcc}
test "$IPTBIN" || IPTBIN=`which iptables`
iptables_find_version #IPTVER
iptables_try_pkgconfig #try to configure from pkg-config
iptables_find_src #IPTSRC
iptables_src_version #check that IPTSRC match to IPTVER
iptables_inc #IPTINC
iptables_modules #IPTLIB
snmp_check
dkms_check
REPLACE="\
s!@CARGS@!$CARGS!;\
s!@KVERSION@!$KVERSION!;\
s!@KDIR@!$KDIR!;\
s!@KOPTS@!$KOPTS!;\
s!@SNMPTARGET@!$SNMPTARGET!;\
s!@SNMPINSTALL@!$SNMPINSTALL!;\
s!@DKMSINSTALL@!$DKMSINSTALL!;\
s!@IPTABLES_VERSION@!$IPTVER!;\
s!@IPTABLES_CFLAGS@!$IPTCFLAGS $IPTINC!;\
s!@IPTABLES_MODULES@!$IPTLIB!"
echo -n "Creating Makefile.. "
sed "$REPLACE" Makefile.in > Makefile
echo done.
echo
echo " If you need some options enabled run ./configure --help"
echo " Now run: make all install"
echo
ipt-netflow-2.2/openwrt/ 0000755 0000000 0000000 00000000000 13213006644 014020 5 ustar root root ipt-netflow-2.2/openwrt/Readme.md 0000644 0000000 0000000 00000003601 13213006644 015537 0 ustar root root Cross-compiling and packages for openwrt
===
Place Makefile in `packages/network/ipt-netflow` directory in OpenWRT bouldroot.
Run `make menuconfig` and select package in Network/Netflow menu. Configure args partially supported.
Run `make` to build full firmware or `make package/network/ipt-netflow/{clean,prepare,configure,compile,install}` to rebuild packages.
To make git version uncomment two lines in Makefile.
Tested to work on Chaos Calmer and Designated Driver with Atheros AR7xxx/AR9xxx target.
For ipt-netflow 2.2 patches are needed, drop it for next version or git master to build.
Making and installilng
===
```shell
mkdir debian-toolchain
sudo debootstrap jessie debian-toolchain
sudo chroot debian-toolchain
. /etc/profile
apt update
apt install git ssh-client build-essential mercurial subversion \
binutils flex bzip2 asciidoc ncurses-dev libssl-dev gawk zlib1g-dev fastjar
adduser user
su user
. /etc/profile
cd ~
git clone https://github.com/openwrt/openwrt.git openwrt-trunk
git clone https://github.com/aabc/ipt-netflow.git
cd openwrt-trunk
./scripts/feeds update -a
ln -s ~/ipt-netflow/openwrt/ package/network/ipt-netflow
make menuconfig
#select target and device
#go to network/netflow and check both
make
#and go for dinner or a walk ;)
#after five hours
scp bin/ar71xx/packages/kernel/kmod-ipt-netflow_4.4.14+2.2-2_ar71xx.ipk \
root@192.168.236.79:/tmp/
scp bin/ar71xx/packages/base/iptables-mod-netflow_2.2-2_ar71xx.ipk \
root@192.168.236.79:/tmp/
scp bin/ar71xx/packages/base/kernel_4.4.14-1-abf9cc6feb410252d667326556dae184_ar71xx.ipk \
root@192.168.236.79:/tmp/
#goto router
ssh root@192.168.236.79
opkg install /tmp/*.ipk
insmod /lib/modules/4.4.14/ipt_NETFLOW.ko
sysctl -w net.netflow.protocol=5
sysctl -w net.netflow.destination=192.168.236.34:2055
iptables -I FORWARD -j NETFLOW
iptables -I INPUT -j NETFLOW
iptables -I OUTPUT -j NETFLOW
```
ipt-netflow-2.2/openwrt/Makefile 0000644 0000000 0000000 00000010011 13213006644 015451 0 ustar root root include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=ipt-netflow
PKG_RELEASE:=2
PKG_SOURCE_URL:=https://github.com/aabc/$(PKG_NAME).git
PKG_VERSION:=2.2
PKG_SOURCE_VERSION:=v$(PKG_VERSION)
#TO BUILD development version uncomment 2 rows below and remove patches
#PKG_VERSION:=$(shell (git ls-remote $(PKG_SOURCE_URL) | grep refs/heads/master | cut -f 1 | head -c 7))
#PKG_SOURCE_VERSION:=HEAD
PKG_SOURCE_PROTO:=git
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
PKG_DEPENDS:=iptables
include $(INCLUDE_DIR)/package.mk
define KernelPackage/ipt-netflow
SECTION:=net
CATEGORY:=Network
SUBMENU:=Netflow
TITLE:=Netflow iptables module for Linux kernel
URL:=http://ipt-netflow.sourceforge.net/
FILES:=$(PKG_BUILD_DIR)/ipt_NETFLOW.ko
DEPENDS:=+iptables +iptables-mod-netflow
endef
define Package/iptables-mod-netflow
SECTION:=net
CATEGORY:=Network
SUBMENU:=Netflow
TITLE:=Netflow iptables module for Linux kernel
URL:=http://ipt-netflow.sourceforge.net/
#DEPENDS:=+kmod-ipt-netflow
DEPENDS:=+iptables
endef
CONFIGURE_ARGS:= \
--kdir="$(LINUX_DIR)"
define Package/iptables-mod-netflow/config
menu "Configuration"
depends on PACKAGE_iptables-mod-netflow
config PACKAGE_iptables-mod-netflow_natevents
bool "enables natevents support"
default n
config PACKAGE_iptables-mod-netflow_snmp-rules
bool "enables SNMP-index conversion rules"
default n
config PACKAGE_iptables-mod-netflow_macaddress
bool "enables MAC address for v9/IPFIX"
default n
config PACKAGE_iptables-mod-netflow_vlan
bool "enables VLAN Ids for v9/IPFIX"
default n
config PACKAGE_iptables-mod-netflow_direction
bool "enables flowDirection(61) Element"
default n
config PACKAGE_iptables-mod-netflow_sampler
bool "enables Flow Sampling"
default n
config PACKAGE_iptables-mod-netflow_aggregation
bool "enables aggregation rules"
default n
config PACKAGE_iptables-mod-netflow_promisc
bool "enables promisc hack mode"
default n
config PACKAGE_iptables-mod-netflow_promisc-mpls
bool "decapsulate MPLS in promisc mode"
default n
config PACKAGE_iptables-mod-netflow_physdev
bool "enables physdev reporting"
default n
config PACKAGE_iptables-mod-netflow_physdev-override
bool "to override interfaces"
default n
config PACKAGE_iptables-mod-netflow_snmp-agent
bool "disables net-snmp agent"
default y
config PACKAGE_iptables-mod-netflow_dkms
bool "disables DKMS support completely"
default y
config PACKAGE_iptables-mod-netflow_dkms-install
bool "no DKMS install but still create dkms.conf"
default n
endmenu
endef
CONFIGURE_ARGS += \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_natevents),--enable-natevents) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_snmp-rules),--enable-snmp-rules) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_macaddress),--enable-macaddress) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_vlan),--enable-vlan) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_direction),--enable-direction) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_sampler),--enable-sampler) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_aggregation),--enable-aggregation) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_promisc),--enable-promisc) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_promisc-mpls),--promisc-mpls) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_physdev),--enable-physdev) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_physdev-override),--enable-physdev-override) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_snmp-agent),--disable-snmp-agent) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_dkms),--disable-dkms) \
$(if $(CONFIG_PACKAGE_iptables-mod-netflow_dkms-install),--disable-dkms-install)
#TODO: --enable-sampler=hash --promisc-mpls=N
$(eval $(call KernelPackage,ipt-netflow))
$(eval $(call Package,kmod-ipt-netflow))
define Package/iptables-mod-netflow/install
$(MAKE) -C $(PKG_BUILD_DIR) DESTDIR=$(1) linstall
#TODO: snmp install, dkms install
endef
$(eval $(call BuildPackage,iptables-mod-netflow))
ipt-netflow-2.2/openwrt/patches/ 0000755 0000000 0000000 00000000000 13213006644 015447 5 ustar root root ipt-netflow-2.2/openwrt/patches/310-Makefile_crosscompile.patch 0000644 0000000 0000000 00000001117 13213006644 023270 0 ustar root root Index: ipt-netflow-2.2/Makefile.in
===================================================================
--- ipt-netflow-2.2.orig/Makefile.in
+++ ipt-netflow-2.2/Makefile.in
@@ -64,10 +64,10 @@ sinstall: | snmp_NETFLOW.so IPT-NETFLOW-
fi
%_sh.o: libipt_NETFLOW.c
- gcc -O2 -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
+ $(CC) $(CFLAGS) -O2 -Wall -Wunused $(IPTABLES_CFLAGS) -fPIC -o $@ -c libipt_NETFLOW.c
%.so: %_sh.o
- gcc -shared -o $@ $<
+ $(CC) -shared -o $@ $<
version.h: ipt_NETFLOW.c ipt_NETFLOW.h compat.h Makefile
@./version.sh --define > version.h
ipt-netflow-2.2/irqtop 0000755 0000000 0000000 00000036760 13213006644 013602 0 ustar root root #!/usr/bin/ruby
# Obeserve irq and softirq in top fashion
# (c) 2014 <abc@telekom.ru>
# License: GPL.
require 'getoptlong'
require 'curses'
require 'stringio'
@imode = :both
@omode = :table
@color = true
@showrps = false
GetoptLong.new(
["--help", "-h", GetoptLong::NO_ARGUMENT],
["--batch", "-b", GetoptLong::NO_ARGUMENT],
["--delay", "-d", GetoptLong::REQUIRED_ARGUMENT],
["--top", "-t", GetoptLong::NO_ARGUMENT],
["--table", "-x", GetoptLong::NO_ARGUMENT],
["--soft", "-s", GetoptLong::NO_ARGUMENT],
["--softirq", GetoptLong::NO_ARGUMENT],
["--softirqs", GetoptLong::NO_ARGUMENT],
["--irq", "-i", GetoptLong::NO_ARGUMENT],
["--irqs", GetoptLong::NO_ARGUMENT],
["--reverse", "-r", GetoptLong::NO_ARGUMENT],
["--nocolor", "-C", GetoptLong::NO_ARGUMENT],
["--eth", "-e", "--pps", GetoptLong::NO_ARGUMENT],
["--rps", "-R", "--xps", GetoptLong::NO_ARGUMENT]
).each do |opt, arg|
case opt
when '--help'
puts " Shows interrupt rates (per second) per cpu."
puts " Also shows irq affinity ('.' for disabled cpus),"
puts " and rps/xps affinity ('+' rx, '-' tx, '*' tx/rx)."
puts " Can show packet rate per eth queue."
puts
puts " Usage: #{$0} [-h] [-d #{@delay}] [-b] [-t|-x] [-i|-s] [-r]"
puts " -d --delay=n refresh interval"
puts " -s --softirq select softirqs only"
puts " -i --irq select hardware irqs only"
puts " -e --eth show extra eth stats (from ethtool)"
puts " -R --rps enable display of rps/xps"
puts " -x --table output in table mode (default)"
puts " -t --top output in flat top mode"
puts " -b --batch output non-interactively"
puts " -r --reverse reverse sort order"
puts " -C --nocolor disable colors"
puts
puts " Rates marked as '.' is forbidden by smp_affinity mask."
exit 0
when '--reverse'
@reverse = !@reverse
when '--batch'
@batch = true
@reverse = !@reverse if @omode == :top
when '--delay'
@delay = arg.to_i
when '--top'
@omode = :top
when '--table'
@omode = :table
when /--irq/
@imode = :irq
when /--soft/
@imode = :soft
when /--pps/
@pps = true
when /--nocolor/
@color = false
when /--rps/
@showrps = !@showrps
end
end
if !@delay && ARGV[0].to_f > 0
@delay = ARGV.shift.to_f
else
@delay = 5
end
@count = ARGV.shift.to_f if ARGV[0].to_i > 0
def read_table(tag, file)
@cpus = []
lines = IO.readlines(file)
@cpus = lines[0].scan(/CPU\d+/)
@icpus = @cpus if tag == 'i'
lines[2..-1].each do |li|
irq, stat, desc = li.match(/^\s*(\S+):((?:\s+\d+)+)(.*)$/).captures
stat = stat.scan(/\d+/)
@irqs << [tag, irq, desc]
stat.each_with_index do |val, i|
# interruptsN, 's|i', irq'N', 'cpuX', 'descr...'
@stats << [val.to_i, tag, irq, @cpus[i], desc.strip]
end
end
end
def read_procstat
@cstat = {}
lines = IO.readlines("/proc/stat").grep(/^cpu\d+ /)
lines.each do |li|
c, *d = li.split(" ")
d = d.map {|e| e.to_i}
@cstat[c] = d
end
end
def read_affinity
@aff = {}
Dir.glob("/proc/irq/*/smp_affinity").each do |af|
irq = af[%r{\d+}].to_i
a = IO.read(af).strip.to_i(16)
@aff[irq] = a
end
end
# list ethernet devices
def net_devices_pci
Dir['/sys/class/net/*'].reject do |f|
f += "/device" unless File.symlink?(f)
if File.symlink?(f)
!(File.readlink(f) =~ %r{devices/pci})
else
false
end
end.map {|f| File.basename(f)}
end
@devlist = net_devices_pci
@devre = Regexp.union(@devlist)
def get_rps(desc)
@rps = @xps = 0
return unless @showrps
return if @devlist.empty?
dev = desc[/\b(#{@devre})\b/, 1]
return unless dev
return unless desc =~ /-(tx|rx)+-\d+/i
qnr = desc[/-(\d+)\s*$/, 1]
return unless qnr
begin
@rps = IO.read("/sys/class/net/#{dev}/queues/rx-#{qnr}/rps_cpus").hex if desc =~ /rx/i
@xps = IO.read("/sys/class/net/#{dev}/queues/tx-#{qnr}/xps_cpus").hex if desc =~ /tx/i
rescue
end
end
def calc_rps(cpu)
m = 0
m |= 1 if @rps & (1 << cpu) != 0
m |= 2 if @xps & (1 << cpu) != 0
" +-*".slice(m, 1)
end
# ethtool -S eth0
def ethtool_grab_stat(dev = nil)
unless dev
@esto = @est if @est
@est = Hash.new { |h,k| h[k] = Hash.new(&h.default_proc) }
@devlist = net_devices_pci
@devre = Regexp.union(@devlist)
# own time counter because this stat could be paused
@ehts = @ets if @ets
@ets = @ts
@edt = @ets - @ehts if @ehts
@devlist.each {|e| ethtool_grab_stat(e)}
return
end
h = Hash.new {|k,v| k[v] = Array.new}
t = `ethtool -S #{dev} 2>/dev/null`
return if t == ''
t.split("\n").map { |e|
e.split(':')
}.reject { |e|
!e[1]
}.each { |k,v|
k.strip!
v = v.strip.to_i
if k =~ /^.x_queue_(\d+)_/
t = k.split('_', 4)
qdir = t[0]
qnr = t[2]
qk = t[3]
@est[dev][qdir][qnr][qk] = v
else
@est[dev][k] = v
end
}
end
def e_queue_stat(dev, qdir, qnr, k)
n = @est[dev][qdir][qnr][k]
o = @esto[dev][qdir][qnr][k]
d = (n - o) / @edt
if d > 0
"%s:%d" % [qdir, d]
else
nil
end
end
def e_dev_stat(dev, k, ks)
n = @est[dev][k]
o = @esto[dev][k]
r = (n - o) / @edt
ks = k unless ks
"%s:%d" % [ks, r]
end
def e_queue_stat_err(dev, qdir, qnr)
r = []
ek = @est[dev][qdir][qnr].keys.reject{|e| e =~ /^(bytes|packets)$/}
ek.each do |k|
n = @est[dev][qdir][qnr][k]
o = @esto[dev][qdir][qnr][k]
d = n - o
r << "%s_%s:%d" % [qdir, k, d] if d.to_i > 0
end
r
end
# this is not rate
def e_dev_stat_sum(dev, rk, ks)
ek = @est[dev].keys.reject{|ek| !(ek =~ rk)}
n = ek.inject(0) {|sum,k| sum += @est[dev][k].to_i}
o = ek.inject(0) {|sum,k| sum += @esto[dev][k].to_i rescue 0}
r = (n - o)
if r > 0
"%s:%d" % [ks, r]
else
nil
end
end
def print_ethstat(desc)
return if @devlist.empty?
dev = desc[/\b(#{@devre})\b/, 1]
return unless dev
unless @esto && @est
print ' []'
return
end
t = []
if desc =~ /-(tx|rx)+-\d+/i
qnr = desc[/-(\d+)\s*$/, 1]
if qnr
if desc =~ /rx/i
t << e_queue_stat(dev, "rx", qnr, "packets")
t += e_queue_stat_err(dev, "rx", qnr)
end
if desc =~ /tx/i
t << e_queue_stat(dev, "tx", qnr, "packets")
t += e_queue_stat_err(dev, "tx", qnr)
end
end
else
t << e_dev_stat(dev, "rx_packets", 'rx')
t << e_dev_stat(dev, "tx_packets", 'tx')
t << e_dev_stat_sum(dev, /_err/, 'err')
t << e_dev_stat_sum(dev, /_drop/, 'drop')
end
t.delete(nil)
print ' [' + t.join(' ') + ']'
end
def grab_stat
# @h[istorical]
@hstats = @stats
@hcstat = @cstat
@hts = @ts
@stats = []
@irqs = []
@ts = Time.now
@dt = @ts - @hts if @hts
read_table 'i', "/proc/interrupts"
read_table 's', "/proc/softirqs"
read_affinity
read_procstat
ethtool_grab_stat if @pps
end
def calc_speed
s = []
# calc speed
h = Hash.new(0)
@hstats.each do |v, t, i, c, d|
h[[t, i, c]] = v
end
# output
@h = {}
@t = Hash.new(0) # rate per cpu
@w = Hash.new(0) # irqs per irqN
@s = @stats.map do |v, t, i, c, d|
rate = (v - h[[t, i, c]]) / @dt
@t[c] += rate if t == 'i'
@w[[t, i]] += (v - h[[t, i, c]])
@h[[t, i, c]] = rate
[rate, v, t, i, c, d]
end
end
def calc_cpu
@cBusy = Hash.new(0)
@cHIrq = Hash.new(0)
@cSIrq = Hash.new(0)
# user, nice, system, [3] idle, [4] iowait, irq, softirq, etc.
@cstat.each do |c, d|
d = d.zip(@hcstat[c]).map {|a, b| a - b}
c = c.upcase
sum = d.reduce(:+)
@cBusy[c] = 100 - (d[3] + d[4]).to_f / sum * 100
@cHIrq[c] = (d[5]).to_f / sum * 100
@cSIrq[c] = (d[6]).to_f / sum * 100
end
end
def show_top
@s.sort!.reverse!
@s.reverse! if @reverse
rej = nil
rej = 's' if @imode == :irq
rej = 'i' if @imode == :soft
@s.each do |s, v, t, i, c, d|
next if t == rej
if s > 0
print "%9.1f %s %s <%s> %s" % [s, c.downcase, t, i, d]
print_ethstat(d) if @pps
puts
end
end
end
@ifilter = {}
def show_interrupts
maxlen = 7
@irqs.reverse! if @reverse
print "%s %*s " % [" ", maxlen, " "]
@icpus.each { |c| print " %6s" % c }
puts
# load
print "%*s: " % [maxlen + 2, "cpuUtil"]
@icpus.each { |c| print " %6.1f" % @cBusy[c] }
puts " total CPU utilization %"
#
print "%*s: " % [maxlen + 2, "%irq"]
@icpus.each { |c| print " %6.1f" % @cHIrq[c] }
puts " hardware IRQ CPU util%"
print "%*s: " % [maxlen + 2, "%sirq"]
@icpus.each { |c| print " %6.1f" % @cSIrq[c] }
puts " software IRQ CPU util%"
# total
print "%*s: " % [maxlen + 2, "irqTotal"]
@icpus.each { |c| print " %6d" % @t[c] }
puts " total hardware IRQs"
rej = nil
rej = 's' if @imode == :irq
rej = 'i' if @imode == :soft
@irqs.each do |t, i, desc|
next if t == rej
# include incrementally and all eth
unless @ifilter[[t, i]] || @showall
next unless @w[[t, i]] > 0 || desc =~ /eth/
@ifilter[[t, i]] = true
end
print "%s %*s: " % [t.to_s, maxlen, i.slice(0, maxlen)]
rps = get_rps(desc)
@icpus.each do |c|
cpu = c[/\d+/].to_i
aff = @aff[i.to_i]
off = ((aff & 1 << cpu) ==0)? true : false if aff
fla = calc_rps(cpu)
begin
v = @h[[t, i, c]]
if v > 0 || !off
print "%6d%c" % [v, fla]
elsif aff
print "%6s%c" % [".", fla]
end
rescue
end
end
print desc
print_ethstat(desc) if @pps
puts
end
end
def select_output
if @omode == :top
show_top
else
show_interrupts
end
end
def curses_choplines(text)
cols = Curses.cols - 1
rows = Curses.lines - 2
lines = text.split("\n").map {|e| e.slice(0, cols)}.slice(0, rows)
text = lines.join("\n")
text << "\n" * (rows - lines.size) if lines.size < rows
text
end
def show_help
puts "irqtop help:"
puts
puts " In table view, cells marked with '.' mean this hw irq is"
puts " disabled via /proc/irq/<irq>/smp_affinity"
puts " Interactive keys:"
puts " i Toggle (hardware) irqs view"
puts " s Toggle software irqs (softirqs) view"
puts " e Show eth stat per queue"
puts " R Show rps/xps affinity"
puts " t Flat top display mode"
puts " x Table display mode"
puts " r Reverse rows order"
puts " c Toggle colors (for eth)"
puts " a Show lines with zero rate (all)"
puts " A Clear lines with zero rates"
puts " . Pause screen updating"
puts " h,? This help screen"
puts " q Quit."
puts " Any other key will update display."
puts
puts "Press any key to continue."
end
hostname = `hostname`.strip
#
grab_stat
sleep 0.5
COLOR_GREEN = "\033[0;32m"
COLOR_YELLOW = "\033[0;33m"
COLOR_CYAN = "\033[0;36m"
COLOR_RED = "\033[0;31m"
COLOR_OFF = "\033[m"
def tty_printline(t)
latr = nil # line color
if t =~ /-rx-/
latr = COLOR_GREEN
elsif t =~ /-tx-/
latr = COLOR_YELLOW
elsif t =~ /\beth/
latr = COLOR_CYAN
end
print latr if latr
if t =~ /cpuUtil:|irq:|sirq:/
# colorize percentage values
t.scan(/\s+\S+/) do |e|
eatr = nil
if e =~ /^\s*[\d.]+$/
if e.to_i >= 90
eatr = COLOR_RED
elsif e.to_i <= 10
eatr = COLOR_GREEN
else
eatr = COLOR_YELLOW
end
end
print eatr if eatr
print e
print (latr)? latr : COLOR_OFF if eatr
end
elsif latr && t =~ / \[[^\]]+\]$/
# colorize eth stats
print $`
print COLOR_OFF if latr
$&.scan(/(.*?)(\w+)(:)(\d+)/) do |e|
eatr = nil
case e[1]
when 'rx'
eatr = COLOR_GREEN
when 'tx'
eatr = COLOR_YELLOW
else
eatr = COLOR_RED
end
eatr = nil if e[3].to_i == 0
print e[0]
print eatr if eatr
print e[1..-1].join
print (latr)? latr : COLOR_OFF if eatr
end
print $'
else
print t
end
print COLOR_OFF if latr
puts
end
def tty_output
if @color
$stdout = StringIO.new
yield
$stdout.rewind
txt = $stdout.read
$stdout = STDOUT
txt.split("\n", -1).each do |li|
tty_printline(li)
end
else
yield
end
end
if @batch
@color = @color && $stdout.tty?
loop do
grab_stat
calc_speed
calc_cpu
puts "#{hostname} - irqtop - #{Time.now}"
tty_output {
select_output
}
$stdout.flush
break if @count && (@count -= 1) == 0
sleep @delay
end
exit 0
end
Curses.init_screen
Curses.start_color
Curses.cbreak
Curses.noecho
Curses.nonl
Curses.init_pair(1, Curses::COLOR_GREEN, Curses::COLOR_BLACK);
Curses.init_pair(2, Curses::COLOR_YELLOW, Curses::COLOR_BLACK);
Curses.init_pair(3, Curses::COLOR_CYAN, Curses::COLOR_BLACK);
Curses.init_pair(4, Curses::COLOR_RED, Curses::COLOR_BLACK);
$stdscr = Curses.stdscr
$stdscr.keypad(true)
def curses_printline(t)
latr = nil # line color
if t =~ /-rx-/
latr = Curses.color_pair(1)
elsif t =~ /-tx-/
latr = Curses.color_pair(2)
elsif t =~ /\beth/
latr = Curses.color_pair(3)
end
$stdscr.attron(latr) if latr
if t =~ /cpuUtil:|irq:|sirq:/
# colorize percentage values
t.scan(/\s+\S+/) do |e|
eatr = nil
if e =~ /^\s*[\d.]+$/
if e.to_i >= 90
eatr = Curses.color_pair(4)
elsif e.to_i <= 10
eatr = Curses.color_pair(1)
else
eatr = Curses.color_pair(2)
end
end
$stdscr.attron(eatr) if eatr
$stdscr.addstr("#{e}")
$stdscr.attroff(eatr) if eatr
end
elsif latr && t =~ / \[[^\]]+\]$/
# colorize eth stats
$stdscr.addstr($`)
$stdscr.attroff(latr) if latr
$&.scan(/(.*?)(\w+)(:)(\d+)/) do |e|
eatr = nil
case e[1]
when 'rx'
eatr = Curses.color_pair(1)
when 'tx'
eatr = Curses.color_pair(2)
else
eatr = Curses.color_pair(4)
end
eatr = nil if e[3].to_i == 0
$stdscr.addstr(e[0])
$stdscr.attron(eatr) if eatr
$stdscr.addstr(e[1..-1].join)
$stdscr.attroff(eatr) if eatr
end
$stdscr.addstr($' + "\n")
else
$stdscr.addstr("#{t}\n")
end
$stdscr.attroff(latr) if latr
end
def curses_output
$stdout = StringIO.new
yield
$stdout.rewind
text = $stdout.read
$stdout = STDOUT
txt = curses_choplines(text)
if @color
txt.split("\n", -1).each_with_index do |li, i|
$stdscr.setpos(i, 0)
curses_printline(li)
end
else
$stdscr.setpos(0, 0)
$stdscr.addstr(txt)
end
$stdscr.setpos(1, 0)
Curses.refresh
end
def curses_enter(text, echo = true)
$stdscr.setpos(1, 0)
$stdscr.addstr(text + "\n")
$stdscr.setpos(1, 0)
Curses.attron(Curses::A_BOLD)
$stdscr.addstr(text)
Curses.attroff(Curses::A_BOLD)
Curses.refresh
Curses.echo if echo
Curses.timeout = -1
line = Curses.getstr
Curses.noecho
line
end
loop do
grab_stat
calc_speed
calc_cpu
curses_output {
puts "#{hostname} - irqtop - #{Time.now}"
select_output
}
Curses.timeout = @delay * 1000
ch = Curses.getch.chr rescue nil
case ch
when "\f"
Curses.clear
when "q", "Z", "z"
break
when 'i'
@imode = (@imode == :both)? :soft : :both
when 's'
@imode = (@imode == :both)? :irq : :both
when 't'
@omode = (@omode == :top)? :table : :top
when 'x'
@omode = (@omode == :table)? :top : :table
when 'e', 'p'
@pps = !@pps
when 'r'
@reverse = !@reverse
when 'c'
@color = !@color
when 'A'
@ifilter = {}
when 'a'
@ifilter = {}
@showall = !@showall
when 'R'
@showrps = !@showrps
when '.'
curses_enter("Pause, press enter to to continue: ", false)
when 'd'
d = curses_enter("Enter display interval: ")
@delay = d.to_f if d.to_f > 0
when 'h', '?'
curses_output { show_help }
Curses.timeout = -1
ch = Curses.getch.chr rescue nil
break if ch == 'q'
end
end
ipt-netflow-2.2/snmp_NETFLOW.c 0000644 0000000 0000000 00000041726 13213006644 014653 0 ustar root root /*
* dlmod plugin for net-snmp for monitoring
* ipt_NETFLOW module via IPT-NETFLOW-MIB.
*
* (c) 2014 <abc@telekom.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#define iptNetflowMIB_oid 1, 3, 6, 1, 4, 1, 37476, 9000, 10, 1 /* .1.3.6.1.4.1.37476.9000.10.1 */
/* iptNetflowObjects */
static oid iptNetflowModule_oid[] = { iptNetflowMIB_oid, 1, 1 };
static oid iptNetflowSysctl_oid[] = { iptNetflowMIB_oid, 1, 2 };
/* iptNetflowStatistics */
static oid iptNetflowTotals_oid[] = { iptNetflowMIB_oid, 2, 1 };
static oid iptNetflowCpuTable_oid[] = { iptNetflowMIB_oid, 2, 2 };
static oid iptNetflowSockTable_oid[] = { iptNetflowMIB_oid, 2, 3 };
struct snmp_vars {
int obj;
int type;
char *name;
time_t ts; /* when value last read */
long long val64;
};
struct snmp_vars modinfos[] = {
{1, ASN_OCTET_STR, "name"},
{2, ASN_OCTET_STR, "version"},
{3, ASN_OCTET_STR, "srcversion"},
{4, ASN_OCTET_STR, "loadTime"}, /* DateAndTime */
{5, ASN_INTEGER, "refcnt"},
{ 0 }
};
#define MODINFO_NAME "ipt_NETFLOW"
#define MODINFO_NAME_ID 1
#define MODINFO_DATE_ID 4
struct snmp_vars sysctls[] = {
{1, ASN_INTEGER, "protocol"},
{2, ASN_INTEGER, "hashsize"},
{3, ASN_INTEGER, "maxflows"},
{4, ASN_INTEGER, "active_timeout"},
{5, ASN_INTEGER, "inactive_timeout"},
{6, ASN_INTEGER, "sndbuf"},
{7, ASN_OCTET_STR, "destination"},
{8, ASN_OCTET_STR, "aggregation"},
{9, ASN_OCTET_STR, "sampler"},
{10, ASN_INTEGER, "natevents"},
{11, ASN_INTEGER, "promisc"},
{12, ASN_OCTET_STR, "snmp-rules"},
{13, ASN_INTEGER, "scan-min"},
{ 0 }
};
struct snmp_vars totals[] = {
{1, ASN_COUNTER64, "inBitRate"},
{2, ASN_GAUGE, "inPacketRate"},
{3, ASN_COUNTER64, "inFlows"},
{4, ASN_COUNTER64, "inPackets"},
{5, ASN_COUNTER64, "inBytes"},
{6, ASN_GAUGE, "hashMetric"},
{7, ASN_GAUGE, "hashMemory"},
{8, ASN_GAUGE, "hashFlows"},
{9, ASN_GAUGE, "hashPackets"},
{10, ASN_COUNTER64, "hashBytes"},
{11, ASN_COUNTER64, "dropPackets"},
{12, ASN_COUNTER64, "dropBytes"},
{13, ASN_GAUGE, "outByteRate"},
{14, ASN_COUNTER64, "outFlows"},
{15, ASN_COUNTER64, "outPackets"},
{16, ASN_COUNTER64, "outBytes"},
{17, ASN_COUNTER64, "lostFlows"},
{18, ASN_COUNTER64, "lostPackets"},
{19, ASN_COUNTER64, "lostBytes"},
{20, ASN_COUNTER, "errTotal"},
{21, ASN_COUNTER, "sndbufPeak"},
{ 0 }
};
#define TOTALS_METRIC_ID 6
static netsnmp_table_data_set *cpu_data_set;
static netsnmp_cache *stat_cache = NULL;
struct snmp_vars cputable[] = {
{1, ASN_INTEGER, "cpuIndex"},
{2, ASN_GAUGE, "cpuInPacketRate"},
{3, ASN_COUNTER64, "cpuInFlows"},
{4, ASN_COUNTER64, "cpuInPackets"},
{5, ASN_COUNTER64, "cpuInBytes"},
{6, ASN_GAUGE, "cpuHashMetric"},
{7, ASN_COUNTER64, "cpuDropPackets"},
{8, ASN_COUNTER64, "cpuDropBytes"},
{9, ASN_COUNTER, "cpuErrTrunc"},
{10, ASN_COUNTER, "cpuErrFrag"},
{11, ASN_COUNTER, "cpuErrAlloc"},
{12, ASN_COUNTER, "cpuErrMaxflows"},
{ 0 }
};
static netsnmp_table_data_set *sock_data_set;
struct snmp_vars socktable[] = {
{1, ASN_INTEGER, "sockIndex"},
{2, ASN_OCTET_STR, "sockDestination"},
{3, ASN_INTEGER, "sockActive"},
{4, ASN_COUNTER, "sockErrConnect"},
{5, ASN_COUNTER, "sockErrFull"},
{6, ASN_COUNTER, "sockErrCberr"},
{7, ASN_COUNTER, "sockErrOther"},
{8, ASN_GAUGE, "sockSndbuf"},
{9, ASN_GAUGE, "sockSndbufFill"},
{10, ASN_GAUGE, "sockSndbufPeak"},
{ 0 }
};
static time_t totals_ts; /* when statistics last read from kernel */
static int var_max(struct snmp_vars *head)
{
struct snmp_vars *sys;
int max = 0;
for (sys = head; sys->obj; sys++)
if (max < sys->obj)
max = sys->obj;
return max;
}
static struct snmp_vars *find_varinfo(struct snmp_vars *head, const int obj)
{
struct snmp_vars *sys;
for (sys = head; sys->obj; sys++) {
if (sys->obj == obj)
return sys;
}
return NULL;
}
static struct snmp_vars *find_varinfo_str(struct snmp_vars *head, const char *name)
{
struct snmp_vars *sys;
for (sys = head; sys->obj; sys++) {
if (!strcmp(sys->name, name))
return sys;
}
return NULL;
}
static void modinfo_fname(char *name, char *fname, size_t flen)
{
snprintf(fname, flen, "/sys/module/" MODINFO_NAME "/%s", name);
}
static void sysctl_fname(char *name, char *fname, size_t flen)
{
snprintf(fname, flen, "/proc/sys/net/netflow/%s", name);
}
static int sysctl_access_ok(char *name)
{
char fname[64];
sysctl_fname(name, fname, sizeof(fname));
if (access(fname, W_OK) < 0)
return 0;
return 1;
}
static char *file_read_string(char *name, char *buf, size_t size)
{
int fd = open(name, O_RDONLY);
if (fd < 0)
return NULL;
int n = read(fd, buf, size - 1);
if (n < 0) {
close(fd);
return NULL;
}
buf[n] = '\0';
close(fd);
return buf;
}
static char *modinfo_read_string(char *name, char *buf, size_t size)
{
char fname[64];
modinfo_fname(name, fname, sizeof(fname));
return file_read_string(fname, buf, size);
}
static char *sysctl_read_string(char *name, char *buf, size_t size)
{
char fname[64];
sysctl_fname(name, fname, sizeof(fname));
return file_read_string(fname, buf, size);
}
static int sysctl_write_string(char *name, char *buf, size_t size)
{
char fname[64];
int fd;
int n;
sysctl_fname(name, fname, sizeof(fname));
fd = open(fname, O_RDWR, 0644);
if (fd < 0)
return fd;
n = write(fd, buf, size);
close(fd);
return n;
}
static int sysctl_read(netsnmp_request_info *request, int obj)
{
struct snmp_vars *sys = find_varinfo(sysctls, obj);
char buf[225];
char *p;
long value;
if (!sys)
goto nosuchobject;
p = sysctl_read_string(sys->name, buf, sizeof(buf));
if (!p)
goto nosuchobject;
switch (sys->type) {
case ASN_INTEGER:
value = atoi(p);
snmp_set_var_typed_value(request->requestvb,
sys->type,
(u_char *)&value, sizeof(value));
return SNMP_ERR_NOERROR;
case ASN_OCTET_STR:
snmp_set_var_typed_value(request->requestvb,
sys->type,
(u_char *)p, strcspn(p, "\n"));
return SNMP_ERR_NOERROR;
}
nosuchobject:
netsnmp_request_set_error(request, SNMP_NOSUCHOBJECT);
return SNMP_ERR_NOERROR;
}
static int sysctl_write(netsnmp_request_info *request, int obj)
{
struct snmp_vars *sys = find_varinfo(sysctls, obj);
char buf[225];
int len;
if (!sys) {
netsnmp_request_set_error(request, SNMP_NOSUCHOBJECT);
return SNMP_ERR_NOERROR;
}
switch (sys->type) {
case ASN_INTEGER:
snprintf(buf, sizeof(buf), "%ld\n", *(request->requestvb->val.integer));
break;
case ASN_UNSIGNED:
snprintf(buf, sizeof(buf), "%lu\n", *(request->requestvb->val.integer));
break;
case ASN_OCTET_STR:
snprintf(buf, sizeof(buf), "%s\n", request->requestvb->val.string);
break;
default:
netsnmp_request_set_error(request, SNMP_ERR_WRONGTYPE);
return SNMP_ERR_NOERROR;
}
len = strlen(buf);
if (sysctl_write_string(sys->name, buf, len) < len)
netsnmp_request_set_error(request, SNMP_ERR_BADVALUE);
return SNMP_ERR_NOERROR;
}
static int iptNetflowModule_handler(
netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *request)
{
struct snmp_vars *sys;
oid obj;
char buf[225];
char *p = NULL;
long value;
obj = request->requestvb->name[request->requestvb->name_length - 2];
sys = find_varinfo(modinfos, obj);
if (!sys) {
netsnmp_request_set_error(request, SNMP_ERR_NOSUCHNAME);
return SNMP_ERR_NOERROR;
}
if (reqinfo->mode != MODE_GET) {
netsnmp_request_set_error(request, SNMP_ERR_READONLY);
return SNMP_ERR_NOERROR;
}
switch (obj) {
case MODINFO_NAME_ID:
p = MODINFO_NAME;
break;
case MODINFO_DATE_ID: {
size_t len;
struct stat st;
modinfo_fname(".", buf, sizeof(buf));
if (stat(buf, &st) < 0)
break;
p = (char *)date_n_time(&st.st_mtime, &len);
snmp_set_var_typed_value(request->requestvb, ASN_OCTET_STR, p, len);
return SNMP_ERR_NOERROR;
}
default:
p = modinfo_read_string(sys->name, buf, sizeof(buf));
}
if (!p) {
netsnmp_request_set_error(request, SNMP_ERR_NOSUCHNAME);
return SNMP_ERR_NOERROR;
}
switch (sys->type) {
case ASN_INTEGER:
value = atoi(p);
snmp_set_var_typed_value(request->requestvb,
sys->type,
(u_char *)&value, sizeof(value));
break;
case ASN_OCTET_STR:
snmp_set_var_typed_value(request->requestvb,
sys->type,
(u_char *)p, strcspn(p, "\n"));
break;
default:
netsnmp_request_set_error(request, SNMP_ERR_WRONGTYPE);
}
return SNMP_ERR_NOERROR;
}
static int iptNetflowSysctl_handler(
netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *request)
{
struct snmp_vars *sys;
oid obj;
obj = request->requestvb->name[request->requestvb->name_length - 2];
switch (reqinfo->mode) {
case MODE_GET:
return sysctl_read(request, obj);
case MODE_SET_RESERVE1:
sys = find_varinfo(sysctls, obj);
if (!sys || !sysctl_access_ok(sys->name))
netsnmp_request_set_error(request, SNMP_ERR_NOSUCHNAME);
if (sys && request->requestvb->type != sys->type)
netsnmp_request_set_error(request, SNMP_ERR_WRONGTYPE);
break;
case MODE_SET_RESERVE2:
case MODE_SET_FREE:
case MODE_SET_UNDO:
case MODE_SET_COMMIT:
return SNMP_ERR_NOERROR;
case MODE_SET_ACTION:
return sysctl_write(request, obj);
default:
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
#define TOTAL_INTERVAL 1
static void clear_data_set(netsnmp_table_data_set *data_set)
{
netsnmp_table_row *row, *nextrow;
for (row = netsnmp_table_data_set_get_first_row(data_set); row; row = nextrow) {
nextrow = netsnmp_table_data_set_get_next_row(data_set, row);
netsnmp_table_dataset_remove_and_delete_row(data_set, row);
}
}
static void parse_table_row(
int cpu,
char *p,
struct snmp_vars *sys,
netsnmp_table_data_set *data_set)
{
netsnmp_table_row *row;
row = netsnmp_create_table_data_row();
netsnmp_table_row_add_index(row, ASN_INTEGER, (u_char *)&cpu, sizeof(cpu));
if (sys == cputable) {
/* add cpuIndex as column too to break SMIv2 */
netsnmp_set_row_column(row, 1, sys->type, (char *)&cpu, sizeof(cpu));
}
for (++sys; p && sys->obj; sys++) {
char *val;
long long val64;
unsigned int uval32;
int val32;
struct counter64 c64;
p += strspn(p, " \t");
val = p;
if ((p = strpbrk(p, " \t")))
*p++ = '\0';
if (index(val, '.')) {
double d = strtod(val, NULL);
val64 = (long long)(d * 100);
} else
val64 = strtoll(val, NULL, 10);
switch (sys->type) {
case ASN_OCTET_STR:
netsnmp_set_row_column(row, sys->obj,
sys->type, (char *)val, strlen(val));
break;
case ASN_INTEGER:
case ASN_GAUGE:
val32 = (int)val64;
netsnmp_set_row_column(row, sys->obj,
sys->type, (char *)&val32, sizeof(val32));
break;
case ASN_COUNTER:
uval32 = (unsigned int)val64;
netsnmp_set_row_column(row, sys->obj,
sys->type, (char *)&uval32, sizeof(uval32));
break;
case ASN_COUNTER64:
c64.low = (uint32_t)val64;
c64.high = val64 >> 32;
netsnmp_set_row_column(row, sys->obj,
sys->type, (char *)&c64, sizeof(c64));
break;
default:
netsnmp_table_dataset_delete_row(row);
continue;
}
}
netsnmp_table_data_add_row(data_set->table, row);
}
static void grab_ipt_netflow_snmp(time_t now)
{
static char buf[4096];
int fd;
int n;
char *p = buf;
if ((now - totals_ts) < (TOTAL_INTERVAL + 1))
return;
if ((fd = open("/proc/net/stat/ipt_netflow_snmp", O_RDONLY)) < 0)
return;
n = read(fd, buf, sizeof(buf) - 1);
close(fd);
if (n <= 0)
return;
buf[n] = '\0';
DEBUGMSGTL(("netflow", "%s\n", buf));
clear_data_set(cpu_data_set);
clear_data_set(sock_data_set);
while (*p) {
struct snmp_vars *sys;
char *name = p;
char *val;
if (!(p = strpbrk(p, " \t")))
break;
*p++ = '\0';
val = p + strspn(p, " \t");
p = index(p, '\n');
*p++ = '\0';
if (!strncmp(name, "cpu", 3)) {
parse_table_row(atoi(name + 3), val, cputable, cpu_data_set);
continue;
} else if (!strncmp(name, "sock", 4)) {
parse_table_row(atoi(name + 4), val, socktable, sock_data_set);
continue;
}
if (!(sys = find_varinfo_str(totals, name)))
continue;
if (index(val, '.')) {
double d = strtod(val, NULL);
sys->val64 = (long long)(d * 100);
} else
sys->val64 = strtoll(val, NULL, 10);
sys->ts = now;
}
totals_ts = now;
}
static int iptNetflowTotals_handler(
netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *request)
{
struct snmp_vars *sys;
time_t now = time(NULL);
oid obj;
unsigned int uval32;
int val32;
struct counter64 c64;
grab_ipt_netflow_snmp(now);
obj = request->requestvb->name[request->requestvb->name_length - 2];
sys = find_varinfo(totals, obj);
if (!sys || ((now - sys->ts) > (TOTAL_INTERVAL * 2 + 3))) {
netsnmp_request_set_error(request, SNMP_ERR_NOSUCHNAME);
return SNMP_ERR_NOERROR;
}
if (reqinfo->mode != MODE_GET) {
netsnmp_request_set_error(request, SNMP_ERR_READONLY);
return SNMP_ERR_NOERROR;
}
switch (sys->type) {
case ASN_GAUGE:
val32 = (int)sys->val64;
snmp_set_var_typed_value(request->requestvb,
sys->type, (u_char *)&val32, sizeof(val32));
break;
case ASN_COUNTER:
uval32 = (unsigned int)sys->val64;
snmp_set_var_typed_value(request->requestvb,
sys->type, (u_char *)&uval32, sizeof(uval32));
break;
case ASN_COUNTER64:
c64.low = (uint32_t)sys->val64;
c64.high = sys->val64 >> 32;
snmp_set_var_typed_value(request->requestvb,
ASN_COUNTER64, (u_char *)&c64, sizeof(c64));
break;
default:
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
static int stat_cache_load(netsnmp_cache *cache, void *x)
{
grab_ipt_netflow_snmp(time(NULL));
return 0;
}
static void dummy_cache_free(netsnmp_cache *cache, void *x)
{
/* free_cache callback is not always checked for NULL
* pointer. */
}
void init_netflow(void)
{
netsnmp_handler_registration *reg;
struct snmp_vars *sys;
/* snmpd -f -L -Dnetflow,dlmod */
DEBUGMSGTL(("netflow", "init_netflow\n"));
netsnmp_register_scalar_group(
netsnmp_create_handler_registration(
"iptNetflowModule",
iptNetflowModule_handler,
iptNetflowModule_oid,
OID_LENGTH(iptNetflowModule_oid),
HANDLER_CAN_RONLY),
1, var_max(modinfos));
netsnmp_register_scalar_group(
netsnmp_create_handler_registration(
"iptNetflowSysctl",
iptNetflowSysctl_handler,
iptNetflowSysctl_oid,
OID_LENGTH(iptNetflowSysctl_oid),
HANDLER_CAN_RWRITE),
1, var_max(sysctls));
netsnmp_register_scalar_group(
netsnmp_create_handler_registration(
"iptNetflowTotals",
iptNetflowTotals_handler,
iptNetflowTotals_oid,
OID_LENGTH(iptNetflowTotals_oid),
HANDLER_CAN_RONLY),
1, var_max(totals));
/* Register first table. */
reg = netsnmp_create_handler_registration(
"iptNetflowCpuTable", /* no handler */ NULL,
iptNetflowCpuTable_oid, OID_LENGTH(iptNetflowCpuTable_oid),
HANDLER_CAN_RONLY);
/* set up columns */
cpu_data_set = netsnmp_create_table_data_set("iptNetflowCpuDataSet");
netsnmp_table_set_add_indexes(cpu_data_set, ASN_INTEGER, 0);
/* I include cpuIndex into columns, which is not SMIv2'ish */
for (sys = cputable; sys->obj; sys++)
netsnmp_table_set_add_default_row(cpu_data_set, sys->obj, sys->type, 0, NULL, 0);
netsnmp_register_table_data_set(reg, cpu_data_set, NULL);
/* cache handler will load actual data, and it needs to be
* injected in front of dataset handler to be called first */
stat_cache = netsnmp_cache_create(
/* no timeout */ -1,
stat_cache_load, dummy_cache_free,
iptNetflowCpuTable_oid, OID_LENGTH(iptNetflowCpuTable_oid));
netsnmp_inject_handler(reg, netsnmp_cache_handler_get(stat_cache));
/* Register second table. */
reg = netsnmp_create_handler_registration(
"iptNetflowSockTable", /* no handler */ NULL,
iptNetflowSockTable_oid, OID_LENGTH(iptNetflowSockTable_oid),
HANDLER_CAN_RONLY);
/* set up columns */
sock_data_set = netsnmp_create_table_data_set("iptNetflowSockDataSet");
/* I don't include sockIndex into columns, which is more SMIv2'ish */
netsnmp_table_set_add_indexes(sock_data_set, ASN_INTEGER, 0);
for (sys = &socktable[1]; sys->obj; sys++)
netsnmp_table_set_add_default_row(sock_data_set, sys->obj, sys->type, 0, NULL, 0);
netsnmp_register_table_data_set(reg, sock_data_set, NULL);
/* as before, cache handler will load actual data, and it needs
* to be injected in front of dataset handler to be called first */
stat_cache = netsnmp_cache_create(
/* no timeout */ -1,
stat_cache_load, dummy_cache_free,
iptNetflowSockTable_oid, OID_LENGTH(iptNetflowSockTable_oid));
netsnmp_inject_handler(reg, netsnmp_cache_handler_get(stat_cache));
}
void deinit_netflow(void)
{
DEBUGMSGTL(("netflow", "deinit_netflow\n"));
}
ipt-netflow-2.2/dkms.conf 0000644 0000000 0000000 00000000427 13213006644 014132 0 ustar root root PACKAGE_NAME=ipt-netflow
pushd `dirname $BASH_SOURCE`
PACKAGE_VERSION=`./version.sh`
popd
BUILT_MODULE_NAME[0]=ipt_NETFLOW
DEST_MODULE_LOCATION[0]=/kernel/extra
STRIP[0]=no
MAKE[0]="make ipt_NETFLOW.ko"
PRE_BUILD="./configure --from-dkms-conf=$kernel_source_dir"
AUTOINSTALL=yes
ipt-netflow-2.2/ipt_NETFLOW.h 0000644 0000000 0000000 00000035363 13213006644 014477 0 ustar root root /*
* This file is part of NetFlow exporting module.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef _IPT_NETFLOW_H
#define _IPT_NETFLOW_H
/*
* Some tech info:
* http://www.cisco.com/en/US/products/ps6601/prod_white_papers_list.html
* http://www.cisco.com/en/US/products/sw/netmgtsw/ps1964/products_implementation_design_guide09186a00800d6a11.html
*/
#define NETFLOW5_RECORDS_MAX 30
struct netflow5_record {
__be32 s_addr;
__be32 d_addr;
__be32 nexthop;
__be16 i_ifc;
__be16 o_ifc;
__be32 nr_packets;
__be32 nr_octets;
__be32 first_ms;
__be32 last_ms;
__be16 s_port;
__be16 d_port;
__u8 reserved;
__u8 tcp_flags;
__u8 protocol;
__u8 tos;
__be16 s_as;
__be16 d_as;
__u8 s_mask;
__u8 d_mask;
__u16 padding;
} __attribute__ ((packed));
/* NetFlow v5 packet */
struct netflow5_pdu {
__be16 version;
__be16 nr_records;
__be32 ts_uptime; /* ms */
__be32 ts_usecs; /* s */
__be32 ts_unsecs; /* ns */
__be32 seq;
__u8 eng_type;
__u8 eng_id;
__u16 sampling;
struct netflow5_record flow[NETFLOW5_RECORDS_MAX];
} __attribute__ ((packed));
#define NETFLOW5_HEADER_SIZE (sizeof(struct netflow5_pdu) - NETFLOW5_RECORDS_MAX * sizeof(struct netflow5_record))
#define IF_NAME_SZ IFNAMSIZ
#define IF_DESC_SZ 32
/* NetFlow v9 http://www.ietf.org/rfc/rfc3954.txt */
/* IPFIX http://www.iana.org/assignments/ipfix/ipfix.xhtml */
/* v9 elements are uppercased, IPFIX camel cased. */
#define one(id, name, len) name = id,
#define two(id, a, b, len) \
one(id, a, len) \
one(id, b, len)
#define Elements \
two(1, IN_BYTES, octetDeltaCount, 4) \
two(2, IN_PKTS, packetDeltaCount, 4) \
two(4, PROTOCOL, protocolIdentifier, 1) \
two(5, TOS, ipClassOfService, 1) \
two(6, TCP_FLAGS, tcpControlBits, 1) \
two(7, L4_SRC_PORT, sourceTransportPort, 2) \
two(8, IPV4_SRC_ADDR, sourceIPv4Address, 4) \
two(9, SRC_MASK, sourceIPv4PrefixLength, 1) \
two(10, INPUT_SNMP, ingressInterface, 2) \
two(11, L4_DST_PORT, destinationTransportPort, 2) \
two(12, IPV4_DST_ADDR, destinationIPv4Address, 4) \
two(13, DST_MASK, destinationIPv4PrefixLength, 1) \
two(14, OUTPUT_SNMP, egressInterface, 2) \
two(15, IPV4_NEXT_HOP, ipNextHopIPv4Address, 4) \
two(21, LAST_SWITCHED, flowEndSysUpTime, 4) \
two(22, FIRST_SWITCHED, flowStartSysUpTime, 4) \
one(25, minimumIpTotalLength, 2) \
one(26, maximumIpTotalLength, 2) \
two(27, IPV6_SRC_ADDR, sourceIPv6Address, 16) \
two(28, IPV6_DST_ADDR, destinationIPv6Address, 16) \
two(31, IPV6_FLOW_LABEL, flowLabelIPv6, 3) \
two(32, ICMP_TYPE, icmpTypeCodeIPv4, 2) \
two(33, MUL_IGMP_TYPE, igmpType, 1) \
two(40, TOTAL_BYTES_EXP, exportedOctetTotalCount, 8) \
two(41, TOTAL_PKTS_EXP, exportedMessageTotalCount, 8) \
two(42, TOTAL_FLOWS_EXP, exportedFlowRecordTotalCount, 8) \
two(48, FLOW_SAMPLER_ID, samplerId, 1) \
two(49, FLOW_SAMPLER_MODE, samplerMode, 1) \
two(50, FLOW_SAMPLER_RANDOM_INTERVAL, samplerRandomInterval, 2) \
one(52, minimumTTL, 1) \
one(53, maximumTTL, 1) \
two(56, SRC_MAC, sourceMacAddress, 6) \
two(57, DST_MAC, postDestinationMacAddress, 6) \
two(58, SRC_VLAN, vlanId, 2) \
two(61, DIRECTION, flowDirection, 1) \
two(62, IPV6_NEXT_HOP, ipNextHopIPv6Address, 16) \
two(64, IPV6_OPTION_HEADERS, ipv6ExtensionHeaders, 2) \
two(70, MPLS_LABEL_1, mplsTopLabelStackSection, 3) \
two(71, MPLS_LABEL_2, mplsLabelStackSection2, 3) \
two(72, MPLS_LABEL_3, mplsLabelStackSection3, 3) \
two(73, MPLS_LABEL_4, mplsLabelStackSection4, 3) \
two(74, MPLS_LABEL_5, mplsLabelStackSection5, 3) \
two(75, MPLS_LABEL_6, mplsLabelStackSection6, 3) \
two(76, MPLS_LABEL_7, mplsLabelStackSection7, 3) \
two(77, MPLS_LABEL_8, mplsLabelStackSection8, 3) \
two(78, MPLS_LABEL_9, mplsLabelStackSection9, 3) \
two(79, MPLS_LABEL_10, mplsLabelStackSection10, 3) \
one(80, destinationMacAddress, 6) \
two(82, IF_NAME, interfaceName, IF_NAME_SZ) \
two(83, IF_DESC, interfaceDescription, IF_DESC_SZ) \
one(136, flowEndReason, 1) \
one(138, observationPointId, 4) \
one(139, icmpTypeCodeIPv6, 2) \
one(141, LineCardId, 4) \
one(142, portId, 4) \
one(143, meteringProcessId, 4) \
one(144, exportingProcessId, 4) \
one(145, TemplateId, 2) \
one(149, observationDomainId, 4) \
one(152, flowStartMilliseconds, 8) \
one(153, flowEndMilliseconds, 8) \
one(154, flowStartMicroseconds, 8) \
one(155, flowEndMicroseconds, 8) \
one(160, systemInitTimeMilliseconds, 8) \
one(163, observedFlowTotalCount, 8) \
one(164, ignoredPacketTotalCount, 8) \
one(165, ignoredOctetTotalCount, 8) \
one(166, notSentFlowTotalCount, 8) \
one(167, notSentPacketTotalCount, 8) \
one(168, notSentOctetTotalCount, 8) \
one(200, mplsTopLabelTTL, 1) \
one(201, mplsLabelStackLength, 1) \
one(202, mplsLabelStackDepth, 1) \
one(208, ipv4Options, 4) \
one(209, tcpOptions, 4) \
one(225, postNATSourceIPv4Address, 4) \
one(226, postNATDestinationIPv4Address, 4) \
one(227, postNAPTSourceTransportPort, 2) \
one(228, postNAPTDestinationTransportPort, 2) \
one(230, natEvent, 1) \
one(243, dot1qVlanId, 2) \
one(244, dot1qPriority, 1) \
one(245, dot1qCustomerVlanId, 2) \
one(246, dot1qCustomerPriority, 1) \
one(252, ingressPhysicalInterface, 2) \
one(253, egressPhysicalInterface, 2) \
one(256, ethernetType, 2) \
one(295, IPSecSPI, 4) \
one(300, observationDomainName, 128) \
one(302, selectorId, 1) \
one(309, samplingSize, 1) \
one(310, samplingPopulation, 2) \
one(318, selectorIdTotalPktsObserved, 8) \
one(319, selectorIdTotalPktsSelected, 8) \
one(323, observationTimeMilliseconds, 8) \
one(324, observationTimeMicroseconds, 8) \
one(325, observationTimeNanoseconds, 8) \
one(390, flowSelectorAlgorithm, 1) \
one(394, selectorIDTotalFlowsObserved, 8) \
one(395, selectorIDTotalFlowsSelected, 8) \
one(396, samplingFlowInterval, 1) \
one(397, samplingFlowSpacing, 2)
enum {
Elements
};
#undef one
#undef two
enum {
FLOWSET_TEMPLATE = 0,
FLOWSET_OPTIONS = 1,
IPFIX_TEMPLATE = 2,
IPFIX_OPTIONS = 3,
FLOWSET_DATA_FIRST = 256,
};
enum { /* v9 scopes */
V9_SCOPE_SYSTEM = 1,
V9_SCOPE_INTERFACE = 2,
V9_SCOPE_LINECARD = 3,
V9_SCOPE_CACHE = 4,
V9_SCOPE_TEMPLATE = 5,
};
struct flowset_template {
__be16 flowset_id;
__be16 length; /* (bytes) */
__be16 template_id;
__be16 field_count; /* (items) */
} __attribute__ ((packed));
struct flowset_data {
__be16 flowset_id; /* corresponds to template_id */
__be16 length; /* (bytes) */
} __attribute__ ((packed));
/* http://tools.ietf.org/html/rfc3954#section-6.1 */
struct flowset_opt_tpl_v9 {
__be16 flowset_id;
__be16 length;
__be16 template_id;
__be16 scope_len; /* (bytes) */
__be16 opt_len; /* (bytes) */
} __attribute__ ((packed));
/* http://tools.ietf.org/html/rfc5101#section-3.4.2.2 */
struct flowset_opt_tpl_ipfix {
__be16 flowset_id;
__be16 length;
__be16 template_id;
__be16 field_count; /* total (items) */
__be16 scope_count; /* (items) must not be zero */
} __attribute__ ((packed));
/* NetFlow v9 packet. */
struct netflow9_pdu {
__be16 version;
__be16 nr_records; /* (items) */
__be32 sys_uptime_ms;
__be32 export_time_s;
__be32 seq;
__be32 source_id; /* Exporter Observation Domain */
__u8 data[1400];
} __attribute__ ((packed));
/* IPFIX packet. */
struct ipfix_pdu {
__be16 version;
__be16 length; /* (bytes) */
__be32 export_time_s;
__be32 seq;
__be32 odomain_id; /* Observation Domain ID */
__u8 data[1400];
} __attribute__ ((packed));
/* Maximum bytes flow can have, after it's reached flow will become
* not searchable and will be exported soon. */
#define FLOW_FULL_WATERMARK 0xffefffff
#define EXTRACT_SPI(tuple) ((tuple.s_port << 16) | tuple.d_port)
#define SAVE_SPI(tuple, spi) { tuple.s_port = spi >> 16; \
tuple.d_port = spi; }
#define MAX_VLAN_TAGS 2
/* hashed data which identify unique flow */
/* 16+16 + 2+2 + 2+1+1+1 = 41 */
struct ipt_netflow_tuple {
union nf_inet_addr src;
union nf_inet_addr dst;
__be16 s_port; // Network byte order
__be16 d_port; // -"-
#ifdef MPLS_DEPTH
__be32 mpls[MPLS_DEPTH]; /* Network byte order */
#endif
__u16 i_ifc; // Host byte order
#ifdef ENABLE_VLAN
__be16 tag[MAX_VLAN_TAGS]; // Network byte order (outer tag first)
#endif
__u8 protocol;
__u8 tos;
__u8 l3proto;
#ifdef ENABLE_MAC
__u8 h_dst[ETH_ALEN];
__u8 h_src[ETH_ALEN];
#endif
} __attribute__ ((packed));
/* hlist[2] + tuple[]: 8+8 + 41 = 57 (less than usual cache line, 64) */
struct ipt_netflow {
struct hlist_node hlist; // hashtable search chain
/* unique per flow data (hashed, NETFLOW_TUPLE_SIZE) */
struct ipt_netflow_tuple tuple;
/* volatile data */
union nf_inet_addr nh;
#if defined(ENABLE_MAC) || defined(ENABLE_VLAN)
__be16 ethernetType; /* Network byte order */
#endif
__u16 o_ifc;
#ifdef ENABLE_PHYSDEV
__u16 i_ifphys;
__u16 o_ifphys;
#endif
#ifdef SNMP_RULES
__u16 i_ifcr; /* translated interface numbers*/
__u16 o_ifcr;
#endif
__u8 s_mask;
__u8 d_mask;
__u8 tcp_flags; /* `OR' of all tcp flags */
__u8 flowEndReason;
#ifdef ENABLE_DIRECTION
__u8 hooknumx; /* hooknum + 1 */
#endif
/* flow statistics */
u_int32_t nr_packets;
u_int32_t nr_bytes;
#ifdef ENABLE_SAMPLER
unsigned int sampler_count; /* for deterministic sampler only */
#endif
union {
struct {
unsigned long first;
unsigned long last;
} ts;
ktime_t ts_obs;
} _ts_un;
#define nf_ts_first _ts_un.ts.first
#define nf_ts_last _ts_un.ts.last
#define nf_ts_obs _ts_un.ts_obs
u_int32_t flow_label; /* IPv6 */
u_int32_t options; /* IPv4(16) & IPv6(32) Options */
u_int32_t tcpoptions;
#ifdef CONFIG_NF_NAT_NEEDED
__be32 s_as;
__be32 d_as;
struct nat_event *nat;
#endif
union {
struct list_head list; /* all flows in ipt_netflow_list */
#ifdef HAVE_LLIST
struct llist_node llnode; /* purged flows */
#endif
} _flow_list;
#define flows_list _flow_list.list
#define flows_llnode _flow_list.llnode
};
#ifdef CONFIG_NF_NAT_NEEDED
enum {
NAT_CREATE = 1, NAT_DESTROY = 2, NAT_POOLEXHAUSTED = 3
};
struct nat_event {
struct list_head list;
struct {
__be32 s_addr;
__be32 d_addr;
__be16 s_port;
__be16 d_port;
} pre, post;
ktime_t ts_ktime;
unsigned long ts_jiffies;
__u8 protocol;
__u8 nat_event;
};
#define IS_DUMMY_FLOW(nf) (nf->nat)
#else
#define IS_DUMMY_FLOW(nf) 0
#endif
static inline int ipt_netflow_tuple_equal(const struct ipt_netflow_tuple *t1,
const struct ipt_netflow_tuple *t2)
{
return (!memcmp(t1, t2, sizeof(struct ipt_netflow_tuple)));
}
struct ipt_netflow_sock {
struct list_head list;
struct socket *sock;
struct sockaddr_storage addr; // destination
struct sockaddr_storage saddr; // source
char sdev[IFNAMSIZ]; // source device
atomic_t wmem_peak; // sk_wmem_alloc peak value
unsigned int err_connect; // connect errors
unsigned int err_full; // socket filled error
unsigned int err_other; // other socket errors
unsigned int err_cberr; // async errors, icmp
unsigned int pkt_exp; // pkts expoted to this dest
u64 bytes_exp; // bytes -"-
u64 bytes_exp_old; // for rate calculation
unsigned int bytes_rate; // bytes per second
unsigned int pkt_sent; // pkts sent to this dest
unsigned int pkt_fail; // pkts failed to send to this dest
};
struct netflow_aggr_n {
struct list_head list;
atomic_t usage;
__u32 mask;
__u32 addr;
__u32 aggr_mask;
__u8 prefix;
};
struct netflow_aggr_p {
struct list_head list;
atomic_t usage;
__u16 port1;
__u16 port2;
__u16 aggr_port;
};
#define NETFLOW_STAT_INC(count) (__get_cpu_var(ipt_netflow_stat).count++)
#define NETFLOW_STAT_ADD(count, val) (__get_cpu_var(ipt_netflow_stat).count += (unsigned long long)val)
#define NETFLOW_STAT_SET(count, val) (__get_cpu_var(ipt_netflow_stat).count = (unsigned long long)val)
#define NETFLOW_STAT_TS(count) \
do { \
ktime_t kts = ktime_get_real(); \
if (!(__get_cpu_var(ipt_netflow_stat)).count.first_tv64) \
__get_cpu_var(ipt_netflow_stat).count.first = kts; \
__get_cpu_var(ipt_netflow_stat).count.last = kts; \
} while (0);
#define NETFLOW_STAT_INC_ATOMIC(count) \
do { \
preempt_disable(); \
(__get_cpu_var(ipt_netflow_stat).count++); \
preempt_enable(); \
} while (0);
#define NETFLOW_STAT_ADD_ATOMIC(count, val) \
do { \
preempt_disable(); \
(__get_cpu_var(ipt_netflow_stat).count += (unsigned long long)val); \
preempt_enable(); \
} while (0);
#define NETFLOW_STAT_READ(count) ({ \
unsigned int _tmp = 0, _cpu; \
for_each_present_cpu(_cpu) \
_tmp += per_cpu(ipt_netflow_stat, _cpu).count; \
_tmp; \
})
struct duration {
ktime_t first;
ktime_t last;
};
/* statistics */
struct ipt_netflow_stat {
u64 searched; // hash stat
u64 found; // hash stat
u64 notfound; // hash stat (new flows)
u64 pkt_total; // packets metered
u64 traf_total; // traffic metered
#ifdef ENABLE_PROMISC
u64 pkt_promisc; // how much packets passed promisc code
u64 pkt_promisc_drop; // how much packets discarded
#endif
/* above is grouped for cache */
unsigned int truncated; // packets stat (drop)
unsigned int frags; // packets stat (drop)
unsigned int maxflows_err; // maxflows reached (drop)
unsigned int alloc_err; // failed to allocate memory (drop & lost)
struct duration drop;
unsigned int send_success; // sendmsg() ok
unsigned int send_failed; // sendmsg() failed
unsigned int sock_cberr; // socket error callback called (got icmp refused)
unsigned int exported_rate; // netflow traffic itself
u64 exported_pkt; // netflow traffic itself
u64 exported_flow; // netflow traffic itself
u64 exported_traf; // netflow traffic itself
u64 exported_trafo; // netflow traffic itself
u64 pkt_total_prev; // packets metered previous interval
u32 pkt_total_rate; // packet rate for this cpu
u64 pkt_drop; // packets not metered
u64 traf_drop; // traffic not metered
u64 flow_lost; // flows not sent to collector
u64 pkt_lost; // packets not sent to collector
u64 traf_lost; // traffic not sent to collector
struct duration lost;
u64 pkt_out; // packets out of the hash
u64 traf_out; // traffic out of the hash
#ifdef ENABLE_SAMPLER
u64 pkts_observed; // sampler stat
u64 pkts_selected; // sampler stat
#endif
u64 old_searched; // previous hash stat
u64 old_found; // for calculation per cpu metric
u64 old_notfound;
int metric; // one minute ewma of hash efficiency
};
#endif
/* vim: set sw=8: */
ipt-netflow-2.2/version.sh 0000755 0000000 0000000 00000001640 13213006644 014347 0 ustar root root #!/bin/sh
# This script determines actual module version.
PATH=$PATH:/usr/local/bin:/usr/bin:/bin
# Base version from the source.
MVERSION=`sed -n 's/^#define.*IPT_NETFLOW_VERSION.*"\(.*\)".*/\1/p' ipt_NETFLOW.c`
# GITVERSION overrides base version.
if [ -e version.h ] && grep -q GITVERSION version.h; then
MVERSION=`sed -n 's/#define GITVERSION "\(.*\)".*/\1/p' version.h`
fi
# git describe overrides version from the source.
if [ -d .git ] && which git >/dev/null 2>&1; then \
GVERSION=`git describe --dirty 2>/dev/null`
if [ "$GVERSION" ]; then
MVERSION=${GVERSION#v}
fi
else
GVERSION=
fi
if [ "$1" = --define ]; then
# called from Makefile to create version.h
# which should contain GITVERSION or be empty.
if [ "$GVERSION" ]; then
echo "#define GITVERSION \"$MVERSION\""
else
echo "/* placeholder, because kernel doesn't like empty files */"
fi
else
# normal run
echo $MVERSION
fi
ipt-netflow-2.2/README 0000644 0000000 0000000 00000101451 13213006644 013204 0 ustar root root ipt_NETFLOW linux 2.6.x-4.x kernel module by <abc@telekom.ru> -- 2008-2016.
High performance NetFlow v5, v9, IPFIX flow data export module for Linux
kernel. Created to be useful for highly loaded linux router. It should be
used as iptables target.
=========================
= Detailed Feature List =
=========================
* High performance and scalability. For highest performance module could be
run without conntrack being enabled in kernel. Reported to be able to
handle 10Gbit traffic with more than 1500000 pps with negligible server
load (on S5500BC).
* NetFlow v5, v9, and IPFIX are fully supported.
Support of v9/IPFIX is adding flexibility to exporting of flow data
plus greater visibility of traffic, letting export many additional fields
besides what was possible in v5 era. Such as
* IPv6 option headers, IPv4 options, TCP options, ethernet type, dot1q
service and customer VLAN ids, MAC addresses, and
* Full IPv6 support,
* NAT translations events (from conntrack) using NetFlow Event Logging (NEL).
This is standardized way for v9/IPFIXr, but module export such events even
for v5 collectors via specially crafted pseudo-records.
* Deterministic (systematic count-based), random and hash Flow Sampling.
With appropriate differences in support of v5, v9, and IPFIX.
* SNMP agent (for net-snmp) for remote management and monitoring.
* Options Templates (v9/IPFIX) let export useful statistical,
configurational, and informational records to collector.
Such as metering, exporting, sampling stat and reliability stat, sampling
configuration, network devices ifName, ifDescr list.
* Tested to compile and work out of the box on Centos 5, 6, 7, Debian and
* Ubuntu. Many vanilla Linux kernels since 2.6.18 up to the latest (as of
* writing is 3.19) are supported and tested.
* Module load time and run-time (via sysctl) configuration.
* Flexibility in enabling features via ./configure script. This will let you
disable features you don't need, which increase compatibility with custom
kernels and performance.
* SNMP-index translation rules, let convert meaningless and unstable
interface indexes (ifIndex) to more meaningful numbering scheme.
* Easy support for catching mirrored traffic with promisc option. Which is
also supporting optional MPLS decapsulation and MPLS-aware NetFlow.
============================
= OBTAINING LATEST VERSION =
============================
$ git clone git://github.com/aabc/ipt-netflow.git ipt-netflow
$ cd ipt-netflow
================
= INSTALLATION =
================
Five easy steps.
** 1. Prepare Kernel source
If you have package system install kernel-devel package, otherwise install
raw kernel source from http://kernel.org matching _exactly_ version of your
installed kernel.
a) What to do for Centos:
~# yum install kernel-devel
b) What to do for Debian and Ubuntu:
~# apt-get install module-assistant
~# m-a prepare
c) Otherwise, if you downloaded raw kernel sources don't forget to create
.config by copying it from your distribution's kernel. Its copy could reside
in /boot or sometimes in /proc, examples:
kernel-src-dir/# cp /boot/config-`uname -r` .config
or
kernel-src-dir/# zcat /proc/config.gz > .config
Assuming you unpacked kernel source into `kernel-src-dir/' directory.
Then run:
kernel-src-dir/# make oldconfig
After that you'll need to prepare kernel for modules build:
kernel-src-dir/# make prepare modules_prepare
Note: Don't try to `make prepare' in Centos kernel-devel package directory
(which is usually something like /usr/src/kernels/2.6.32-431.el6.x86_64)
as this is wrong and meaningless.
** 2. Prepare Iptables
Before this step it also would be useful to install pkg-config if don't
already have.
If you have package system just install iptables-devel (or iptables-dev)
package, otherwise install iptables source matching version of your
installation from ftp://ftp.netfilter.org/pub/iptables/
a) What to do for Centos:
# yum install iptables-devel
b) What to do for Debian or Ubuntu:
# apt-get install iptables-dev pkg-config
c) Otherwise, for raw iptables source build it and make install.
** 3. Prepare net-snmp (optional)
In case you want to manage or monitor module performance via SNMP you
may install net-snmp. If you want to skip this step run configure
with --disable-snmp-agent option.
a) For Centos:
# yum install net-snmp net-snmp-devel
b) For Debian or Ubuntu:
# apt-get install snmpd libsnmp-dev
c) Otherwise install net-snmp from www.net-snmp.org
** 4. Now, to actually build the module run:
~/ipt-netflow# ./configure
~/ipt-netflow# make all install
~/ipt-netflow# depmod
This will install kernel module and iptables specific library.
Troubleshooting:
a) Sometimes you will want to add CC=gcc-3 to make command.
Example: make CC=gcc-3.3
b) Compile module with actual kernel source compiled.
I.e. first compile kernel and boot into it, and then compile module.
If you are using kernel-devel package check that its version matches
your kernel package.
c) If you have sources in non-standard places or configure isn't able to
find something run ./configure --help to see how to specify paths manually.
d) To run irqtop on Debian 8 you may need to install:
# apt-get install ruby ruby-dev ncurses-dev
# gem install curses
z) If all fails create ticket at
https://github.com/aabc/ipt-netflow/issues
** 5. After this point you should be able to load module and
use -j NETFLOW target in your iptables. See next section.
=====================
= Configure Options =
=====================
Configure script allows to enable or disable optional features:
--enable-natevents
enables natevents (NEL) support, (this and option will require
conntrack support to be enabled into kernel and conntack
module (nf_conntrack) loaded before ipt_NETFLOW. Usually this is
done automatically because of `depmod', but if you don't do `make
install' you'll need to load nf_conntrack manually.
Read below for explanation of natevents.
--enable-sampler
enables flow sampler. Read below for explanation of its configuration
option.
--enable-sampler=hash
additionally enables 'hash' sampler.
--disable-snmp-agent
disables building net-snmp agent module, which is enabled by default.
--enable-snmp-rules
enables SNMP-index conversion rules. Read below for explanation
of snmp-rules.
--enable-macaddress
enables exporting of src and dst MAC addresses for every flow
in v9/IPFIX. Difference in any of MAC address will be accounted
as differnt flow. I.e. MAC addresses will be part of flow key.
--enable-vlan
enables exporting of dot1q VLAN Ids and Priorities for every flow
in v9/IPFIX. It supports outer and second dot1q tags if present.
Any of two previous options will enable exporting of Ethernet Packet
Type, ethernetType(256).
--enable-direction
enables exporting of flowDirection(61) Element for v9/IPFIX.
Packets captured in PREROUTING and INPUT chains will be accounted as
ingress flows(0), in OUTPUT and POSTROUTING as egress flows(1), and
in FORWARD will have flowDirection set to undefined value 255.
--enable-aggregation
enables aggregation rules. Read below for explanation of aggregation.
--disable-dkms
disable creating dkms.conf and auto-install module into DKMS tree.
--disable-dkms-install
only disable auto-install into DKMS, but still create dkms.conf, in
case you will want to install it manually.
--enable-physdev
Export ingressPhysicalInterface(252) and egressPhysicalInterface(253)
(relevant for bridges) in V9 and IPFIX. If your collector does not
support these Elements but you still need physdevs then use
--enable-physdev-override, in that case physdevs will override normal
interface numbers ingressInterface(10) and egressInterface(14).
--enable-promisc
Enables capturing of promiscuous packets into raw/PREROUTING chain.
See README.promisc Solution 1 for usage details and example.
--promisc-mpls
Enables MPLS label stack decapsulation for promiscuous packets. (For
IPv4 and IPv6 packets only). This also enables MPLS-aware NetFlow (v9
and IPFIX), you may wish to specify with --promisc-mpls=n how much MPLS
labels you want to be recorded and exported (default is 3, maximum is
10, set to 0 to not report anything).
===========
= RUNNING =
===========
1. You can load module directly by insmod like this:
# insmod ipt_NETFLOW.ko destination=127.0.0.1:2055 debug=1
Or if properly installed (make install; depmod) by this:
# modprobe ipt_NETFLOW destination=127.0.0.1:2055
See, you may add options in insmod/modprobe command line, or add
them in /etc/modprobe.conf or /etc/modprobe.d/ipt_NETFLOW.conf
like thus:
options ipt_NETFLOW destination=127.0.0.1:2055 protocol=9 natevents=1
2. Statistics is in /proc/net/stat/ipt_netflow
Machine readable statistics is in /proc/net/stat/ipt_netflow_snmp
To view boring slab statistics: grep ipt_netflow /proc/slabinfo
Dump of all flows is in /proc/net/stat/ipt_netflow_flows
3. You can view parameters and control them via sysctl, example:
# sysctl net.netflow
# sysctl net.netflow.hashsize=32768
Note: For after-reboot configuration I recommend to store module parameters
in modprobe configs instead of storing them in /etc/sysctl.conf, as it's
less clear when init process will apply sysctl.conf, before of after
module's load.
4. Example of directing all IPv4 traffic into the module:
# iptables -I FORWARD -j NETFLOW
# iptables -I INPUT -j NETFLOW
# iptables -I OUTPUT -j NETFLOW
Note: It is preferable (because easier to understand) to _insert_
NETFLOW target at the top of the chain, otherwise not all traffic may
reach NETFLOW if your iptables configuration is complicated and some
other rule inadvertently consume the traffic (dropping or acepting before
NETFLOW is reached). It's always good to test your configuration.
Use iptables -L -nvx to check pkts/bytes counters on the rules.
5. If you want to account IPv6 traffic you should use protocol 9 or 10.
Example of directing all IPv6 traffic into the module:
# sysctl net.netflow.protocol=10
# ip6tables -I FORWARD -j NETFLOW
# ip6tables -I INPUT -j NETFLOW
# ip6tables -I OUTPUT -j NETFLOW
Note: First enable right version of protocol and after that add ip6tables
rules, otherwise you will get errors in dmesg.
6. If you want to account NAT events (NEL):
# sysctl net.netflow.natevents=1
Note that natevents feature is completely independent from traffic accounting
(it's using so called conntrack events), thus you don't need to set or change
any iptables rules to use that. You may need to enable kernel config option
CONFIG_NF_CONNTRACK_EVENTS though (if it isn't already enabled).
For details on how they are exported for different protocol versions see
below.
7. For SNMP support you will need to add this command into snmpd.conf to
enable IPT-NETFLOW-MIB in SNMP agent:
dlmod netflow /usr/lib/snmp/dlmod/snmp_NETFLOW.so
Restart snmpd for changes to take effect. Don't forget to properly configure
access control. Example simplest configuration may looks like (note that this
is whole /etc/snmp/snmpd.conf):
rocommunity public 127.0.0.1
dlmod netflow /usr/lib/snmp/dlmod/snmp_NETFLOW.so
Note, that this config will also allow _full_ read-only access to the whole
linux MIB. To install IPT-NETFLOW-MIB locally, copy file IPT-NETFLOW-MIB.my
into ~/.snmp/mibs/
* Detailed example of SNMP configuration is there:
* https://github.com/aabc/ipt-netflow/wiki/Configuring-SNMP-access
To check that MIB is installed well you may issue:
$ snmptranslate -m IPT-NETFLOW-MIB -IR -Tp iptNetflowMIB
This should output IPT-NETFLOW-MIB in tree form.
To check that snmp agent is working well issue:
$ snmpwalk -v 1 -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowMIB
Should output full MIB. If MIB is not installed try:
$ snmpget -v 1 -c public 127.0.0.1 .1.3.6.1.4.1.37476.9000.10.1.1.1.1.0
Which should output STRING: "ipt_NETFLOW".
MIB provides access to very similar statistics that you have in
/proc/net/stat/ipt_netflow, you can read description of objects in
text file IPT-NETFLOW-MIB.my
If you want to access to SNMP stat in machine readable form for your
scripts there is file /proc/net/stat/ipt_netflow_snmp
Note: Using of SNMP v2c or v3 is mandatory for most tables, because
this MIB uses 64-bit counters (Counter64) which is not supported in old
SNMP v1. You should understand that 32-bit counter will wrap on 10Gbit
traffic in just 3.4 seconds! So, always pass option `-v2c' or `-v3'
to net-snmp utils. Or, for example, configure option `defVersion 2c'
in ~/.snmp/snmp.conf You can also have `defCommunity public' ov v3
auth parameters (defSecurityName, defSecurityLevel, defPassphrase)
set there (man snmp.conf).
Examples for dumping typical IPT-NETFLOW-MIB objects:
- Module info (similar to modinfo, SNMPv1 is ok for following two objects):
$ snmpwalk -v 1 -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowModule
- Read-write sysctl-like parameters (yes, they are writable via snmpset, you
may need to configure write access to snmpd, though):
$ snmpwalk -v 1 -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowSysctl
- Global performance stat of the module (note -v2c, because rest of the
objects require SNMP v2c or SNMP v3):
$ snmpwalk -v2c -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowTotals
- Per-CPU (metering) and per-socket (exporting) statistics in table format:
$ snmptable -v2c -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowCpuTable
$ snmptable -v2c -c public 127.0.0.1 -m IPT-NETFLOW-MIB iptNetflowSockTable
===========
= OPTIONS =
===========
Options can be passed as parameters to module or changed dynamically
via sysctl net.netflow or IPT-NETFLOW-MIB::iptNetflowSysctl
protocol=5
- what version of NetFlow protocol to use. Default is 5.
You can choose from 5, 9, or 10 (where 10 is IPFIX). If you plan
to account IPv6 traffic you should use protocol 9 or 10 (IPFIX),
because NetFlow v5 isn't compatible with IPv6.
destination=127.0.0.1:2055
- where to export netflow, to this ip address. Port is optional, default
is 2055. You will see this connection in netstat like this:
udp 0 0 127.0.0.1:32772 127.0.0.1:2055 ESTABLISHED
destination=[2001:db8::1]:2055
- export target using IPv6 address. Brackets are optional, but otherwise
you should delimit port with 'p' or '#' character.
destination=127.0.0.1:2055,192.0.0.1:2055
- mirror flows to two (can be more) addresses, separate addresses
with comma.
destination=127.0.0.1:2055@127.0.0.2
- bind socket to address (127.0.0.2).
destination=127.0.0.1:2055%eth0
- bind socket to interface (eth0). May be useful for multi-homed boxes.
sampler=deterministic:123
sampler=random:123
sampler=hash:123
- enables Flow Sampling. To disable set to the empty value or to `0'.
Note, that this is flow sampling (as of RFC 7014), not packet
sampling (PSAMP).
There is three sampling modes:
deterministic: select each N-th observed flow; in IPFIX this mode
is called Systematic count-based Sampling;
random: select randomly one out of N flows.
hash: select hash-randomly one out of N flows.
Number after colon is population size N, with valid values 2-16383.
(This 16383 limit is for compatibility with NetFlow v5.)
Using 'deterministic' and 'random' sampling will not reduce resource
usage caused by the module, because flows are sampled late in exporting
process. This will reduces amount of flows which go to the collector,
thus, reducing load on the collector.
On the other hand, using 'hash' sampling will reduce CPU and memory
load caused by the module, because flows are discarded early in the
processing chain. They are discarded almost like in random sampler,
except that pseudo-random value is depend on the Flow Key hash for each
packet.
All required NetFlow/IPFIX information to signal use of sampling is
also sent to the collector. 'Hash' sampling will be presented as 'random'
sampling to the collector, because of their similarity.
Note, that Flow Sampling is compatible with NetFlow v5, v9, and IPFIX.
natevents=1
- Collect and send NAT translation events as NetFlow Event Logging (NEL)
for NetFlow v9/IPFIX, or as dummy flows compatible with NetFlow v5.
Default is 0 (don't send).
For NetFlow v5 protocol meaning of fields in dummy flows are such:
Src IP, Src Port is Pre-nat source address.
Dst IP, Dst Port is Post-nat destination address.
- These two fields made equal to data flows catched in FORWARD chain.
Nexthop, Src AS is Post-nat source address for SNAT. Or,
Nexthop, Dst AS is Pre-nat destination address for DNAT.
TCP Flags is SYN+SCK for start event, RST+FIN for stop event.
Pkt/Traffic size is 0 (zero), so it won't interfere with accounting.
Natevents are compilation disabled by default, to enable you will need to
add --enable-natevents option to ./configure script.
For techical description of NAT Events see:
http://tools.ietf.org/html/draft-ietf-behave-ipfix-nat-logging-04
inactive_timeout=15
- export flow after it's inactive for 15 seconds. Default value is 15.
active_timeout=1800
- export flow after it's active for 1800 seconds (30 minutes). Default
value is 1800.
refresh-rate=20
- for NetFlow v9 and IPFIX it's rate how frequently to re-send templates
(per packets). You probably don't need to change default (which is 20).
timeout-rate=30
- for NetFlow v9 and IPFIX it's rate when to re-send old templates (in
minutes). No need to change it.
debug=0
- debug level (none).
sndbuf=number
- size of output socket buffer in bytes. I recommend you to put higher
value if you experience netflow packet drops (can be seen in statistics
as 'sock: fail' number.)
Default value is system default.
hashsize=number
- Hash table bucket size. Used for performance tuning.
Abstractly speaking, it should be minimum two times bigger than flows
you usually have, but not need to.
Default is system memory dependent small enough value.
maxflows=2000000
- Maximum number of flows to account. It's here to prevent DOS attacks.
After this limit is reached new flows will not be accounted. Default is
2000000, zero is unlimited.
aggregation=string..
- Few aggregation rules (or some say they are rule.)
Buffer for aggregation string 1024 bytes, and sysctl limit it
to ~700 bytes, so don't write there a lot.
Rules worked in definition order for each packet, so don't
write them a lot again.
Rules applied to both directions (dst and src).
Rules tried until first match, but for netmask and port
aggregations separately.
Delimit them with commas.
Rules are of two kinds: for netmask aggregation
and port aggregation:
a) Netmask aggregation example: 192.0.0.0/8=16
Which mean to strip addresses matching subnet 192.0.0.0/8 to /16.
b) Port aggregation example: 80-89=80
Which mean to replace ports from 80 to 89 with 80.
Full example:
aggregation=192.0.0.0/8=16,10.0.0.0/8=16,80-89=80,3128=80
Aggregation rules are enabled by default, if you feel you don't need them
you may add --disable-aggregation to ./configure script.
snmp-rules=string...
- Few SNMP-index conversion rules similar to fproble-ulog.
Quoting man fprobe-ulog:
"Comma separated list of interface name to SNMP-index conversion
rules. Each rule consists of interface base name and SNMP-index
base separated by colon (e.g. ppp:200). Final SNMP-index is sum
of corresponding SNMP-index base and interface number.
In the above example SNMP-index of interface ppp11 is 211.
If interface name did not fit to any of conversion rules then
SNMP-index will be taken from kernel."
This implementation isn't optimized for performance (no rule caching
or hashing), but should be fast if rules list are short.
Rules are parsed in order from first to last until first match.
snmp-rules are compilation disabled by default, to enable you will need
to add --enable-snmp option to ./configure script.
scan-min=1
- Minimal interval between flow export scans. Sometimes could be useful
to reduce load on exporting CPU by increasing this interval. Value are
in kernel jiffies units (which is x/HZ seconds).
promisc=1
- Enables promisc hack. See README.promisc Solution 1 for details.
exportcpu=number
- Lock exporter to single CPU. This may be useful to fine control CPU
load. Common use case: with smp_affinity and RSS you spread packet
processing to all CPUs except one, and lock it to the exporter. While
exporter CPU load generally is not high, for someone it may be not
desirable to combine it with packet processing on very highly loaded
routers.
This option could be changed at runtime with:
# echo number > /sys/module/ipt_NETFLOW/parameters/exportcpu
engine_id=number
- Observation Domain ID (on IPFIX, Source Id on NetFlow v9, or Engine Id
on NetFlow v5) value to be exported. This may help your collector to
distinguish between multiple exporters. On Netflow v9 and IPFIX this
value is 32-bit on NetFlow v5 only 8 low bits are significant.
Default value is 0.
This option could be changed at runtime with:
# echo number > /sys/module/ipt_NETFLOW/parameters/engine_id
====================
= HOW TO READ STAT =
====================
Statistics is your friend to fine tune and understand netflow module
performance.
To see stat in human readable form:
# cat /proc/net/stat/ipt_netflow
How to interpret the data:
> ipt_NETFLOW version v1.8-122-gfae9d59-dirty, srcversion 6141961152BE0DFA6A21EF4; aggr mac vlan
This line helps to identify actual source that your module is build on.
Please always supply it in all bug reports.
v1.8-122: 1.8 is release, 122 is commit number after release;
-gfae9d59: fae9d59 is short git commit id;
-dirty: if present, meaning that git detected that sources are changed since
last git commit, you may wish to do `git diff' to view changes;
srcversion 6141961152BE0DFA6A21EF4: binary version of module, you can
compare this with data from `modinfo ./ipt_NETFLOW.ko' to identify
actual binary loaded;
aggr mac vlan: tags to identify compile time options that are enabled.
> Protocol version 10 (ipfix), refresh-rate 20, timeout-rate 30, (templates 2, active 2). Timeouts: active 5, inactive 15. Maxflows 2000000
Protocol version currently in use. Refresh-rate and timeout-rate
for v9 and IPFIX. Total templates generated and currently active.
Timeout: active X: how much seconds to wait before exporting active flow.
- same as sysctl net.netflow.active_timeout variable.
inactive X: how much seconds to wait before exporting inactive flow.
- same as sysctl net.netflow.inactive_timeout variable.
Maxflows 2000000: maxflows limit.
- all flows above maxflows limit must be dropped.
- you can control maxflows limit by sysctl net.netflow.maxflows variable.
> Promisc hack is disabled (observed 0 packets, discarded 0).
observed n: To see that promisc hack is really working.
> Natevents disabled, count start 0, stop 0.
- Natevents mode disabled or enabled, and how much start or stop events
are reported.
> Flows: active 5187 (peak 83905 reached 0d0h1m ago), mem 283K, worker delay 100/1000 (37 ms, 0 us, 4:0 0 [3]).
active X: currently active flows in memory cache.
- for optimum CPU performance it is recommended to set hash table size to
at least twice of average of this value, or higher.
peak X reached Y ago: peak value of active flows.
mem XK: how much kilobytes of memory currently taken by active flows.
- one active flow taking 56 bytes of memory.
- there is system limit on cache size too.
worker delay X/HZ: how frequently exporter scan flows table per second.
Rest is boring debug info.
> Hash: size 8192 (mem 32K), metric 1.00, [1.00, 1.00, 1.00]. InHash: 1420 pkt, 364 K, InPDU 28, 6716.
Hash: size X: current hash size/limit.
- you can control this by sysctl net.netflow.hashsize variable.
- increasing this value can significantly reduce CPU load.
- default value is not optimal for performance.
- optimal value is twice of average of active flows.
mem XK: how much memory occupied by hash table.
- hash table is fixed size by nature, taking 4 bytes per entry.
metric X, [X, X, X]: how optimal is your hash table being used.
- lesser value mean more optimal hash table use, min is 1.0.
- last three numbers in squares is moving average (EWMA) of hash table
access divided by match rate (searches / matches) for 4sec, and 1, 5, and
15 minutes. Sort of hash table load average. First value is instantaneous.
You can try to increase hashsize if averages more than 1 (increase
certainly if >= 2).
InHash: X pkt, X K: how much traffic accounted for flows in the hash table.
InPDU X, X: how much traffic in flows preparing to be exported.
> Rate: 202448 bits/sec, 83 packets/sec; 1 min: 668463 bps, 930 pps; 5 min: 329039 bps, 483 pps
- Module throughput values for 1 second, 1 minute, and 5 minutes.
> cpu# pps; <search found new [metric], trunc frag alloc maxflows>, traffic: <pkt, bytes>, drop: <pkt, bytes>
> cpu0 123; 980540 10473 180600 [1.03], 0 0 0 0, traffic: 188765, 14 MB, drop: 27863, 1142 K
cpu#: this is Total and per CPU statistics for:
pps: packets per second on this CPU. It's useful to debug load imbalance.
<search found new, trunc frag alloc maxflows>: internal stat for:
search found new: hash table searched, found, and not found counters.
[metric]: one minute (ewma) average hash metric per cpu.
trunc: how much truncated packets are ignored
- for example if packets don't have valid IP header.
- it's also accounted in drop packets counter, but not in drop bytes.
frag: how much fragmented packets have seen.
- kernel defragments INPUT/OUTPUT chains for us if nf_defrag_ipv[46]
module is loaded.
- these packets are not ignored but not reassembled either, so:
- if there is no enough data in fragment (ex. tcp ports) it is considered
to be zero.
alloc: how much cache memory allocations are failed.
- packets ignored and accounted in traffic drop stat.
- probably increase system memory if this ever happen.
maxflows: how much packets ignored on maxflows (maximum active flows reached).
- packets ignored and accounted in traffic drop stat.
- you can control maxflows limit by sysctl net.netflow.maxflows variable.
traffic: <pkt, bytes>: how much traffic is accounted.
pkt, bytes: sum of packets/megabytes accounted by module.
- flows that failed to be exported (on socket error) is accounted here too.
drop: <pkt, bytes>: how much of traffic is not accounted.
pkt, bytes: sum of packets/kilobytes that are dropped by metering process.
- reasons these drops are accounted here:
truncated/fragmented packets,
packet is for new flow but failed to allocate memory for it,
packet is for new flow but maxflows is already reached.
Traffic lost due to socket errors is not accounted here. Look below
about export and socket errors.
> Export: Rate 0 bytes/s; Total 2 pkts, 0 MB, 18 flows; Errors 0 pkts; Traffic lost 0 pkts, 0 Kbytes, 0 flows.
Rate X bytes/s: traffic rate generated by exporter itself.
Total X pkts, X MB: total amount of traffic generated by exporter.
X flows: how much data flows are exported.
Errors X pkts: how much packets not sent due to socket errors.
Traffic lost 0 pkts, 0 Kbytes, 0 flows: how much metered traffic is lost
due to socket errors.
Note that `cberr' errors are not accounted here due to their asynchronous
nature. Read below about `cberr' errors.
> sock0: 10.0.0.2:2055 unconnected (1 attempts).
If socket is unconnected (for example if module loaded before interfaces is
up) it shows now much connection attempts was failed. It will try to connect
until success.
> sock0: 10.0.0.2:2055, sndbuf 106496, filled 0, peak 106848; err: sndbuf reached 928, connect 0, cberr 0, other 0
sockX: per destination stats for:
X.X.X.X:Y: destination ip address and port.
- controlled by sysctl net.netflow.destination variable.
sndbuf X: how much data socket can hold in buffers.
- controlled by sysctl net.netflow.sndbuf variable.
- if you have packet drops due to sndbuf reached (error -11) increase this
value.
filled X: how much data in socket buffers right now.
peak X: peak value of how much data in socket buffers was.
- you will be interested to keep it below sndbuf value.
err: how much packets are dropped due to errors.
- all flows from them will be accounted in drop stat.
sndbuf reached X: how much packets dropped due to sndbuf being too small
(error -11).
connect X: how much connection attempts was failed.
cberr X: how much connection refused ICMP errors we got from export target.
- probably you are not launched collector software on destination,
- or specified wrong destination address.
- flows lost in this fashion is not possible to account in drop stat.
- these are ICMP errors, and would look like this in tcpdump:
05:04:09.281247 IP alice.19440 > bob.2055: UDP, length 120
05:04:09.281405 IP bob > alice: ICMP bob udp port 2055 unreachable, length 156
other X: dropped due to other possible errors.
> aggr0: ...
aggrX: aggregation rulesets.
- controlled by sysctl net.netflow.aggregation variable.
==========================
= NetFlow considerations =
==========================
List of all IPFIX Elements http://www.iana.org/assignments/ipfix/ipfix.xhtml
Flow Keys are Elements that distinguish flows. Quoting RFC: "If a Flow
Record for a specific Flow Key value already exists, the Flow Record is
updated; otherwise, a new Flow Record is created."
In this implementation following Elements are treated as Flow Keys:
IPv4 source address: sourceIPv4Address(8),
IPv6 source address: sourceIPv6Address(27),
IPv4 destination address: destinationIPv4Address(12),
IPv6 destination address: destinationIPv6Address(28),
TCP/UDP source port: sourceTransportPort(7),
TCP/UDP destination port: destinationTransportPort(11),
input interface: ingressInterface(10),
IP protocol: protocolIdentifier(4),
IP TOS: ipClassOfService(5),
and address family (IP or IPv6).
Additional Flow Keys if VLAN exporting is enabled:
First (outer) dot1q VLAN tag: dot1qVlanId(243) and
dot1qPriority(244) for IPFIX,
or vlanId(243) for NetFlow v9.
Second (customer) dot1q VLAN tag: dot1qCustomerVlanId(245)
and dot1qCustomerPriority(246).
Additional Flow Keys if MAC address exporting is enabled:
Destination MAC address: destinationMacAddress(80),
Source MAC address: sourceMacAddress(56).
Additional Flow Keys if MPLS-aware NetFlow is enabled:
Captured MPLS stack is fully treated as flow key (including TTL values),
which is Elements from mplsTopLabelStackSection(70) to
mplsLabelStackSection10(79), and, if present, mplsTopLabelTTL(200).
Other Elements are not Flow Keys. Note that outer interface, which is
egressInterface(14), is not regarded as Flow Key. Quoting RFC 7012: "For
Information Elements ... for which the value may change from packet to packet
within a single Flow, the exported value of an Information Element is by
default determined by the first packet observed for the corresponding Flow".
Note that NetFlow and IPFIX modes of operation may have slightly different
Elements being used and different statistics sent via Options Templates.
=========
= VOILA =
=========
ipt-netflow-2.2/README.promisc 0000644 0000000 0000000 00000006755 13213006644 014672 0 ustar root root Hello,
If you wish to account with ipt-netflow module traffic mirrored on switch you may follow
one of these examples:
Solution 1: Promisc-hack module option. [2014]
Solution 2: General kernel patch. [2008]
Solution 3: Alternative w/o kernel patch, using bridges. [2010]
**************
* Solution 1 *
**************
No kernel patching is need anymore! (As in easy.)
Compile module with `./configure --enable-promisc' option. This will enable
`promisc=' module parameter and sysctl parameter `net.netflow.promisc'.
Set any of these to `1' to enable promisc hack, you will see dmesg message
that it's enabled, set to `0' to disable (default).
This option turned on will pass promisc traffic into `PREROUTING' chain
of `raw' table (same as with promisc patches). Briefly it's like this:
# cd ipt-netflow/
# ./configure --enable-promisc
# make all install
# iptables -A PREROUTING -t raw -i eth2 -j NETFLOW
# sysctl net.netflow.promisc=1
# ifconfig eth2 promisc
# grep Promisc /proc/net/stat/ipt_netflow
Now you should be able to see promisc observed packets count increasing.
Note, that enabling module's parameter promisc=1 will not enable promiscuous
mode on network cards, these are completely different things. This option will
let iptables to see promisc traffic. That traffic will not be routed anywhere
and discarded just after passing PREROUTING chain.
Do not enable this option if you have kernel already patched with promisc
patch, as this may cause double accounting. Just keep it disabled or remove
the patch. Promisc patching is completely custom and non-standard, so if you
did not apply it - you are most probably safe to use promisc option. But, if
in doubt - measure if module seeing traffic in raw/PREROUTING, if it isn't - you
don't have the patch applied and certainly safe to use the option.
**************
* Solution 2 *
**************
1. Patch your kernel with `raw_promisc.patch' to enable raw table to see promisc traffic.
# cd /usr/src/linux
# patch -p1 < ~/ipt_netflow/raw_promisc.patch
Then recompile and reinstall patched kernel.
2. For example you mirroring traffic on your Cisco switch to 47th vlan:
# interface FastEthernet0/32
# description this port with vlan 47
# switchport trunk encapsulation dot1q
# switchport mode trunk
# !
# interface FastEthernet0/33
# port monitor FastEthernet0/32
# !
3. Enable promisc mode on interface to actually see the packets:
# /sbin/ifconfig eth1 promisc
4. Configure vlan on your linux box:
# /sbin/vconfig add eth1 47
# /sbin/ifconfig eth1.47 up
5. Compile module:
# make clean all install
6. Load ipt_netflow module:
# /sbin/modprobe ipt_NETFLOW hashsize=160000 destination=127.0.0.1:9800
7. Direct all packets from 47th vlan to ipt_netflow module:
# /sbin/iptables -A PREROUTING -t raw -i eth1.47 -j NETFLOW
Voila.
ps. For Debian Squeeze instructions look at raw_promisc_debian_squeeze6.patch
**************
* Solution 3 *
**************
By Anonymous.
> raw promisc hack is not needed
> there is a more elegant way to capture port mirrored traffic:
>
> 1. create a bridge of eth0 and dummy0
> 2. put eth0 to promisc
> 3. add a "-i br0 -j NETFLOW" rule to FORWARD (possibly also -j DROP after that)
>
> ...for some reason it works when ipt_netflow is attached to a bridge, but
> requires the promisc hack when attached to a real promisc interface.
Sometimes you may need to run:
# brctl setageing br0 0
for this scheme to work.
ipt-netflow-2.2/murmur3.h 0000644 0000000 0000000 00000001712 13213006644 014106 0 ustar root root /* MurmurHash3, based on https://code.google.com/p/smhasher of Austin Appleby. */
static __always_inline uint32_t rotl32(const uint32_t x, const int8_t r)
{
return (x << r) | (x >> (32 - r));
}
static __always_inline uint32_t fmix32(register uint32_t h)
{
h ^= h >> 16;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
return h;
}
static inline uint32_t murmur3(const void *key, const uint32_t len, const uint32_t seed)
{
const uint32_t c1 = 0xcc9e2d51;
const uint32_t c2 = 0x1b873593;
const uint32_t *blocks;
const uint8_t *tail;
register uint32_t h1 = seed;
uint32_t k1 = 0;
uint32_t i;
blocks = (const uint32_t *)key;
for (i = len / 4; i; --i) {
h1 ^= rotl32(*blocks++ * c1, 15) * c2;
h1 = rotl32(h1, 13) * 5 + 0xe6546b64;
}
tail = (const uint8_t*)blocks;
switch (len & 3) {
case 3: k1 ^= tail[2] << 16;
case 2: k1 ^= tail[1] << 8;
case 1: k1 ^= tail[0];
h1 ^= rotl32(k1 * c1, 15) * c2;
}
return fmix32(h1^ len);
}
ipt-netflow-2.2/CREDITS 0000644 0000000 0000000 00000005720 13213006644 013346 0 ustar root root License is GPL v2, is the same as of Linux kernel:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Sign-off rule is that of the Linux kernel:
Developer's Certificate of Origin 1.1
By making a contribution to this project, I certify that:
(a) The contribution was created in whole or in part by me and I
have the right to submit it under the open source license
indicated in the file; or
(b) The contribution is based upon previous work that, to the best
of my knowledge, is covered under an appropriate open source
license and I have the right under that license to submit that
work with modifications, whether created in whole or in part
by me, under the same open source license (unless I am
permitted to submit under a different license), as indicated
in the file; or
(c) The contribution was provided directly to me by some other
person who certified (a), (b) or (c) and I have not modified
it.
(d) I understand and agree that this project and the contribution
are public and that a record of the contribution (including all
personal information I submit with it, including my sign-off) is
maintained indefinitely and may be redistributed consistent with
this project or the open source license(s) involved.
Principal author and project maintainer:
ABC <abc@telekom.ru> [2008-2015]
Compatibility layer is using code from Linux Kernel and should be
attributed to respective Linux developers.
MurmurHash3 is based on smhasher (2012) of Austin Appleby.
Patch authors and submitters:
Ilya Evseev [2010]
spizer [2010]
Eric W. Biederman [2010]
Giedrius Liubavičius [2010]
Igor Alov [2010]
Alexey Osipov [2011]
Pavel Boldin [2012]
Alexander Demenshin [2013]
uropek [2013]
shaman [2013]
Jeremy Drake [2013]
Matthew Martin [2016] DKMS fixes
alex-eri [2016, 2017] OpenWRT compatibility
Reference or prototype code authors:
Valentin V. Yankin [2011] SNMP-index
Project supporters:
Summa Telecom [2014]
Starlink [2014]
Anonymous
Extensive testing and other help:
Alexander (shulik) [2013]
Igor Diakonov @ Summa Telecom [2014]
Yuriy Dolgoruk @ Summa Telecom [2014]
Andrew Savin @ Starlink [2014]
Alexander Zakharov @ WAW Technologies [2015]
Ivanov Eduard [2015]
Maciej Zdeb [2015]
(Send your names, emails, or nicks to add to the list.)
Generated by GNU Enscript 1.6.6.