2 * Copyright (c) 2010-2011 Alexander V. Chernikov <melifaro@ipfw.ru>
3 * Copyright (c) 2004-2005 Gleb Smirnoff <glebius@FreeBSD.org>
4 * Copyright (c) 2001-2003 Roman V. Palagin <romanp@unshadow.net>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * $SourceForge: ng_netflow.c,v 1.30 2004/09/05 11:37:43 glebius Exp $
31 static const char rcs_id[] =
34 #include "opt_inet6.h"
35 #include "opt_route.h"
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/limits.h>
42 #include <sys/socket.h>
43 #include <sys/syslog.h>
44 #include <sys/ctype.h>
47 #include <net/ethernet.h>
48 #include <net/route.h>
49 #include <net/if_arp.h>
50 #include <net/if_var.h>
51 #include <net/if_vlan_var.h>
53 #include <netinet/in.h>
54 #include <netinet/in_systm.h>
55 #include <netinet/ip.h>
56 #include <netinet/ip6.h>
57 #include <netinet/tcp.h>
58 #include <netinet/udp.h>
59 #include <netinet/sctp.h>
61 #include <netgraph/ng_message.h>
62 #include <netgraph/ng_parse.h>
63 #include <netgraph/netgraph.h>
64 #include <netgraph/netflow/netflow.h>
65 #include <netgraph/netflow/netflow_v9.h>
66 #include <netgraph/netflow/ng_netflow.h>
68 /* Netgraph methods */
69 static ng_constructor_t ng_netflow_constructor;
70 static ng_rcvmsg_t ng_netflow_rcvmsg;
71 static ng_close_t ng_netflow_close;
72 static ng_shutdown_t ng_netflow_rmnode;
73 static ng_newhook_t ng_netflow_newhook;
74 static ng_rcvdata_t ng_netflow_rcvdata;
75 static ng_disconnect_t ng_netflow_disconnect;
77 /* Parse type for struct ng_netflow_info */
78 static const struct ng_parse_struct_field ng_netflow_info_type_fields[]
79 = NG_NETFLOW_INFO_TYPE;
80 static const struct ng_parse_type ng_netflow_info_type = {
81 &ng_parse_struct_type,
82 &ng_netflow_info_type_fields
85 /* Parse type for struct ng_netflow_ifinfo */
86 static const struct ng_parse_struct_field ng_netflow_ifinfo_type_fields[]
87 = NG_NETFLOW_IFINFO_TYPE;
88 static const struct ng_parse_type ng_netflow_ifinfo_type = {
89 &ng_parse_struct_type,
90 &ng_netflow_ifinfo_type_fields
93 /* Parse type for struct ng_netflow_setdlt */
94 static const struct ng_parse_struct_field ng_netflow_setdlt_type_fields[]
95 = NG_NETFLOW_SETDLT_TYPE;
96 static const struct ng_parse_type ng_netflow_setdlt_type = {
97 &ng_parse_struct_type,
98 &ng_netflow_setdlt_type_fields
101 /* Parse type for ng_netflow_setifindex */
102 static const struct ng_parse_struct_field ng_netflow_setifindex_type_fields[]
103 = NG_NETFLOW_SETIFINDEX_TYPE;
104 static const struct ng_parse_type ng_netflow_setifindex_type = {
105 &ng_parse_struct_type,
106 &ng_netflow_setifindex_type_fields
109 /* Parse type for ng_netflow_settimeouts */
110 static const struct ng_parse_struct_field ng_netflow_settimeouts_type_fields[]
111 = NG_NETFLOW_SETTIMEOUTS_TYPE;
112 static const struct ng_parse_type ng_netflow_settimeouts_type = {
113 &ng_parse_struct_type,
114 &ng_netflow_settimeouts_type_fields
117 /* Parse type for ng_netflow_setconfig */
118 static const struct ng_parse_struct_field ng_netflow_setconfig_type_fields[]
119 = NG_NETFLOW_SETCONFIG_TYPE;
120 static const struct ng_parse_type ng_netflow_setconfig_type = {
121 &ng_parse_struct_type,
122 &ng_netflow_setconfig_type_fields
125 /* Parse type for ng_netflow_settemplate */
126 static const struct ng_parse_struct_field ng_netflow_settemplate_type_fields[]
127 = NG_NETFLOW_SETTEMPLATE_TYPE;
128 static const struct ng_parse_type ng_netflow_settemplate_type = {
129 &ng_parse_struct_type,
130 &ng_netflow_settemplate_type_fields
133 /* Parse type for ng_netflow_setmtu */
134 static const struct ng_parse_struct_field ng_netflow_setmtu_type_fields[]
135 = NG_NETFLOW_SETMTU_TYPE;
136 static const struct ng_parse_type ng_netflow_setmtu_type = {
137 &ng_parse_struct_type,
138 &ng_netflow_setmtu_type_fields
141 /* Parse type for struct ng_netflow_v9info */
142 static const struct ng_parse_struct_field ng_netflow_v9info_type_fields[]
143 = NG_NETFLOW_V9INFO_TYPE;
144 static const struct ng_parse_type ng_netflow_v9info_type = {
145 &ng_parse_struct_type,
146 &ng_netflow_v9info_type_fields
149 /* List of commands and how to convert arguments to/from ASCII */
150 static const struct ng_cmdlist ng_netflow_cmds[] = {
156 &ng_netflow_info_type
162 &ng_parse_uint16_type,
163 &ng_netflow_ifinfo_type
169 &ng_netflow_setdlt_type,
174 NGM_NETFLOW_SETIFINDEX,
176 &ng_netflow_setifindex_type,
181 NGM_NETFLOW_SETTIMEOUTS,
183 &ng_netflow_settimeouts_type,
188 NGM_NETFLOW_SETCONFIG,
190 &ng_netflow_setconfig_type,
195 NGM_NETFLOW_SETTEMPLATE,
197 &ng_netflow_settemplate_type,
204 &ng_netflow_setmtu_type,
212 &ng_netflow_v9info_type
218 /* Netgraph node type descriptor */
219 static struct ng_type ng_netflow_typestruct = {
220 .version = NG_ABI_VERSION,
221 .name = NG_NETFLOW_NODE_TYPE,
222 .constructor = ng_netflow_constructor,
223 .rcvmsg = ng_netflow_rcvmsg,
224 .close = ng_netflow_close,
225 .shutdown = ng_netflow_rmnode,
226 .newhook = ng_netflow_newhook,
227 .rcvdata = ng_netflow_rcvdata,
228 .disconnect = ng_netflow_disconnect,
229 .cmdlist = ng_netflow_cmds,
231 NETGRAPH_INIT(netflow, &ng_netflow_typestruct);
233 /* Called at node creation */
235 ng_netflow_constructor(node_p node)
240 /* Initialize private data */
241 priv = malloc(sizeof(*priv), M_NETGRAPH, M_WAITOK | M_ZERO);
243 /* Initialize fib data */
244 priv->maxfibs = rt_numfibs;
245 priv->fib_data = malloc(sizeof(fib_export_p) * priv->maxfibs,
246 M_NETGRAPH, M_WAITOK | M_ZERO);
248 /* Make node and its data point at each other */
249 NG_NODE_SET_PRIVATE(node, priv);
252 /* Initialize timeouts to default values */
253 priv->info.nfinfo_inact_t = INACTIVE_TIMEOUT;
254 priv->info.nfinfo_act_t = ACTIVE_TIMEOUT;
256 /* Set default config */
257 for (i = 0; i < NG_NETFLOW_MAXIFACES; i++)
258 priv->ifaces[i].info.conf = NG_NETFLOW_CONF_INGRESS;
260 /* Initialize callout handle */
261 callout_init(&priv->exp_callout, CALLOUT_MPSAFE);
263 /* Allocate memory and set up flow cache */
264 ng_netflow_cache_init(priv);
270 * ng_netflow supports two hooks: data and export.
271 * Incoming traffic is expected on data, and expired
272 * netflow datagrams are sent to export.
275 ng_netflow_newhook(node_p node, hook_p hook, const char *name)
277 const priv_p priv = NG_NODE_PRIVATE(node);
279 if (strncmp(name, NG_NETFLOW_HOOK_DATA, /* an iface hook? */
280 strlen(NG_NETFLOW_HOOK_DATA)) == 0) {
286 cp = name + strlen(NG_NETFLOW_HOOK_DATA);
287 if (!isdigit(*cp) || (cp[0] == '0' && cp[1] != '\0'))
290 ifnum = (int)strtoul(cp, &eptr, 10);
291 if (*eptr != '\0' || ifnum < 0 || ifnum >= NG_NETFLOW_MAXIFACES)
294 /* See if hook is already connected */
295 if (priv->ifaces[ifnum].hook != NULL)
298 iface = &priv->ifaces[ifnum];
300 /* Link private info and hook together */
301 NG_HOOK_SET_PRIVATE(hook, iface);
305 * In most cases traffic accounting is done on an
306 * Ethernet interface, so default data link type
307 * will be DLT_EN10MB.
309 iface->info.ifinfo_dlt = DLT_EN10MB;
311 } else if (strncmp(name, NG_NETFLOW_HOOK_OUT,
312 strlen(NG_NETFLOW_HOOK_OUT)) == 0) {
318 cp = name + strlen(NG_NETFLOW_HOOK_OUT);
319 if (!isdigit(*cp) || (cp[0] == '0' && cp[1] != '\0'))
322 ifnum = (int)strtoul(cp, &eptr, 10);
323 if (*eptr != '\0' || ifnum < 0 || ifnum >= NG_NETFLOW_MAXIFACES)
326 /* See if hook is already connected */
327 if (priv->ifaces[ifnum].out != NULL)
330 iface = &priv->ifaces[ifnum];
332 /* Link private info and hook together */
333 NG_HOOK_SET_PRIVATE(hook, iface);
336 } else if (strcmp(name, NG_NETFLOW_HOOK_EXPORT) == 0) {
338 if (priv->export != NULL)
341 /* Netflow version 5 supports 32-bit counters only */
342 if (CNTR_MAX == UINT64_MAX)
347 /* Exporter is ready. Let's schedule expiry. */
348 callout_reset(&priv->exp_callout, (1*hz), &ng_netflow_expire,
350 } else if (strcmp(name, NG_NETFLOW_HOOK_EXPORT9) == 0) {
352 if (priv->export9 != NULL)
355 priv->export9 = hook;
357 /* Exporter is ready. Let's schedule expiry. */
358 callout_reset(&priv->exp_callout, (1*hz), &ng_netflow_expire,
366 /* Get a netgraph control message. */
368 ng_netflow_rcvmsg (node_p node, item_p item, hook_p lasthook)
370 const priv_p priv = NG_NODE_PRIVATE(node);
371 struct ng_mesg *resp = NULL;
375 NGI_GET_MSG(item, msg);
377 /* Deal with message according to cookie and command */
378 switch (msg->header.typecookie) {
379 case NGM_NETFLOW_COOKIE:
380 switch (msg->header.cmd) {
381 case NGM_NETFLOW_INFO:
383 struct ng_netflow_info *i;
385 NG_MKRESPONSE(resp, msg, sizeof(struct ng_netflow_info),
387 i = (struct ng_netflow_info *)resp->data;
388 ng_netflow_copyinfo(priv, i);
392 case NGM_NETFLOW_IFINFO:
394 struct ng_netflow_ifinfo *i;
395 const uint16_t *index;
397 if (msg->header.arglen != sizeof(uint16_t))
400 index = (uint16_t *)msg->data;
401 if (*index >= NG_NETFLOW_MAXIFACES)
404 /* connected iface? */
405 if (priv->ifaces[*index].hook == NULL)
408 NG_MKRESPONSE(resp, msg,
409 sizeof(struct ng_netflow_ifinfo), M_NOWAIT);
410 i = (struct ng_netflow_ifinfo *)resp->data;
411 memcpy((void *)i, (void *)&priv->ifaces[*index].info,
412 sizeof(priv->ifaces[*index].info));
416 case NGM_NETFLOW_SETDLT:
418 struct ng_netflow_setdlt *set;
419 struct ng_netflow_iface *iface;
421 if (msg->header.arglen !=
422 sizeof(struct ng_netflow_setdlt))
425 set = (struct ng_netflow_setdlt *)msg->data;
426 if (set->iface >= NG_NETFLOW_MAXIFACES)
428 iface = &priv->ifaces[set->iface];
430 /* connected iface? */
431 if (iface->hook == NULL)
436 iface->info.ifinfo_dlt = DLT_EN10MB;
439 iface->info.ifinfo_dlt = DLT_RAW;
446 case NGM_NETFLOW_SETIFINDEX:
448 struct ng_netflow_setifindex *set;
449 struct ng_netflow_iface *iface;
451 if (msg->header.arglen !=
452 sizeof(struct ng_netflow_setifindex))
455 set = (struct ng_netflow_setifindex *)msg->data;
456 if (set->iface >= NG_NETFLOW_MAXIFACES)
458 iface = &priv->ifaces[set->iface];
460 /* connected iface? */
461 if (iface->hook == NULL)
464 iface->info.ifinfo_index = set->index;
468 case NGM_NETFLOW_SETTIMEOUTS:
470 struct ng_netflow_settimeouts *set;
472 if (msg->header.arglen !=
473 sizeof(struct ng_netflow_settimeouts))
476 set = (struct ng_netflow_settimeouts *)msg->data;
478 priv->info.nfinfo_inact_t = set->inactive_timeout;
479 priv->info.nfinfo_act_t = set->active_timeout;
483 case NGM_NETFLOW_SETCONFIG:
485 struct ng_netflow_setconfig *set;
487 if (msg->header.arglen !=
488 sizeof(struct ng_netflow_setconfig))
491 set = (struct ng_netflow_setconfig *)msg->data;
493 if (set->iface >= NG_NETFLOW_MAXIFACES)
496 priv->ifaces[set->iface].info.conf = set->conf;
500 case NGM_NETFLOW_SETTEMPLATE:
502 struct ng_netflow_settemplate *set;
504 if (msg->header.arglen !=
505 sizeof(struct ng_netflow_settemplate))
508 set = (struct ng_netflow_settemplate *)msg->data;
510 priv->templ_packets = set->packets;
511 priv->templ_time = set->time;
515 case NGM_NETFLOW_SETMTU:
517 struct ng_netflow_setmtu *set;
519 if (msg->header.arglen !=
520 sizeof(struct ng_netflow_setmtu))
523 set = (struct ng_netflow_setmtu *)msg->data;
524 if ((set->mtu < MIN_MTU) || (set->mtu > MAX_MTU))
527 priv->mtu = set->mtu;
531 case NGM_NETFLOW_SHOW:
532 if (msg->header.arglen !=
533 sizeof(struct ngnf_show_header))
536 NG_MKRESPONSE(resp, msg, NGRESP_SIZE, M_NOWAIT);
541 error = ng_netflow_flow_show(priv,
542 (struct ngnf_show_header *)msg->data,
543 (struct ngnf_show_header *)resp->data);
549 case NGM_NETFLOW_V9INFO:
551 struct ng_netflow_v9info *i;
553 NG_MKRESPONSE(resp, msg,
554 sizeof(struct ng_netflow_v9info), M_NOWAIT);
555 i = (struct ng_netflow_v9info *)resp->data;
556 ng_netflow_copyv9info(priv, i);
561 ERROUT(EINVAL); /* unknown command */
566 ERROUT(EINVAL); /* incorrect cookie */
571 * Take care of synchronous response, if any.
572 * Free memory and return.
575 NG_RESPOND_MSG(error, node, item, resp);
581 /* Receive data on hook. */
583 ng_netflow_rcvdata (hook_p hook, item_p item)
585 const node_p node = NG_HOOK_NODE(hook);
586 const priv_p priv = NG_NODE_PRIVATE(node);
587 const iface_p iface = NG_HOOK_PRIVATE(hook);
589 struct mbuf *m = NULL, *m_old = NULL;
590 struct ip *ip = NULL;
591 struct ip6_hdr *ip6 = NULL;
593 int pullup_len = 0, off;
594 uint8_t acct = 0, bypass = 0, flags = 0, upper_proto = 0;
595 int error = 0, l3_off = 0;
596 unsigned int src_if_index;
597 caddr_t upper_ptr = NULL;
601 if ((hook == priv->export) || (hook == priv->export9)) {
603 * Data arrived on export hook.
604 * This must not happen.
606 log(LOG_ERR, "ng_netflow: incoming data on export hook!\n");
610 if (hook == iface->hook) {
611 if ((iface->info.conf & NG_NETFLOW_CONF_INGRESS) == 0)
614 } else if (hook == iface->out) {
615 if ((iface->info.conf & NG_NETFLOW_CONF_EGRESS) == 0)
621 if ((!bypass) && (iface->info.conf &
622 (NG_NETFLOW_CONF_ONCE | NG_NETFLOW_CONF_THISONCE))) {
623 mtag = m_tag_locate(NGI_M(item), MTAG_NETFLOW,
624 MTAG_NETFLOW_CALLED, NULL);
625 while (mtag != NULL) {
626 if ((iface->info.conf & NG_NETFLOW_CONF_ONCE) ||
627 ((ng_ID_t *)(mtag + 1))[0] == NG_NODE_ID(node)) {
631 mtag = m_tag_locate(NGI_M(item), MTAG_NETFLOW,
632 MTAG_NETFLOW_CALLED, mtag);
640 NG_FWD_ITEM_HOOK(error, item, out);
644 if (iface->info.conf &
645 (NG_NETFLOW_CONF_ONCE | NG_NETFLOW_CONF_THISONCE)) {
646 mtag = m_tag_alloc(MTAG_NETFLOW, MTAG_NETFLOW_CALLED,
647 sizeof(ng_ID_t), M_NOWAIT);
649 ((ng_ID_t *)(mtag + 1))[0] = NG_NODE_ID(node);
650 m_tag_prepend(NGI_M(item), mtag);
654 /* Import configuration flags related to flow creation */
655 flags = iface->info.conf & NG_NETFLOW_FLOW_FLAGS;
660 /* Increase counters. */
661 iface->info.ifinfo_packets++;
664 * Depending on interface data link type and packet contents
665 * we pullup enough data, so that ng_netflow_flow_add() does not
666 * need to know about mbuf at all. We keep current length of data
667 * needed to be contiguous in pullup_len. mtod() is done at the
668 * very end one more time, since m can had changed after pulluping.
670 * In case of unrecognized data we don't return error, but just
671 * pass data to downstream hook, if it is available.
674 #define M_CHECK(length) do { \
675 pullup_len += length; \
676 if (((m)->m_pkthdr.len < (pullup_len)) || \
677 ((pullup_len) > MHLEN)) { \
681 if ((m)->m_len < (pullup_len) && \
682 (((m) = m_pullup((m),(pullup_len))) == NULL)) { \
688 switch (iface->info.ifinfo_dlt) {
689 case DLT_EN10MB: /* Ethernet */
691 struct ether_header *eh;
694 M_CHECK(sizeof(struct ether_header));
695 eh = mtod(m, struct ether_header *);
697 /* Make sure this is IP frame. */
698 etype = ntohs(eh->ether_type);
701 M_CHECK(sizeof(struct ip));
702 eh = mtod(m, struct ether_header *);
703 ip = (struct ip *)(eh + 1);
704 l3_off = sizeof(struct ether_header);
709 * m_pullup() called by M_CHECK() pullups
710 * kern.ipc.max_protohdr (default 60 bytes)
713 M_CHECK(sizeof(struct ip6_hdr));
714 eh = mtod(m, struct ether_header *);
715 ip6 = (struct ip6_hdr *)(eh + 1);
716 l3_off = sizeof(struct ether_header);
721 struct ether_vlan_header *evh;
723 M_CHECK(sizeof(struct ether_vlan_header) -
724 sizeof(struct ether_header));
725 evh = mtod(m, struct ether_vlan_header *);
726 etype = ntohs(evh->evl_proto);
727 l3_off = sizeof(struct ether_vlan_header);
729 if (etype == ETHERTYPE_IP) {
730 M_CHECK(sizeof(struct ip));
731 ip = (struct ip *)(evh + 1);
734 } else if (etype == ETHERTYPE_IPV6) {
735 M_CHECK(sizeof(struct ip6_hdr));
736 ip6 = (struct ip6_hdr *)(evh + 1);
742 goto bypass; /* pass this frame */
746 case DLT_RAW: /* IP packets */
747 M_CHECK(sizeof(struct ip));
748 ip = mtod(m, struct ip *);
749 /* l3_off is already zero */
752 * If INET6 is not defined IPv6 packets
753 * will be discarded in ng_netflow_flow_add().
755 if (ip->ip_v == IP6VERSION) {
757 M_CHECK(sizeof(struct ip6_hdr) - sizeof(struct ip));
758 ip6 = mtod(m, struct ip6_hdr *);
769 if ((ip != NULL) && ((ip->ip_off & htons(IP_OFFMASK)) == 0)) {
770 if ((ip->ip_v != IPVERSION) ||
771 ((ip->ip_hl << 2) < sizeof(struct ip)))
774 * In case of IPv4 header with options, we haven't pulled
777 M_CHECK((ip->ip_hl << 2) - sizeof(struct ip));
779 /* Save upper layer offset and proto */
781 upper_proto = ip->ip_p;
784 * XXX: in case of wrong upper layer header we will
785 * forward this packet but skip this record in netflow.
789 M_CHECK(sizeof(struct tcphdr));
792 M_CHECK(sizeof(struct udphdr));
795 M_CHECK(sizeof(struct sctphdr));
798 } else if (ip != NULL) {
800 * Nothing to save except upper layer proto,
801 * since this is a packet fragment.
803 flags |= NG_NETFLOW_IS_FRAG;
804 upper_proto = ip->ip_p;
805 if ((ip->ip_v != IPVERSION) ||
806 ((ip->ip_hl << 2) < sizeof(struct ip)))
809 } else if (ip6 != NULL) {
810 int cur = ip6->ip6_nxt, hdr_off = 0;
811 struct ip6_ext *ip6e;
812 struct ip6_frag *ip6f;
814 if (priv->export9 == NULL)
817 /* Save upper layer info. */
821 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION)
825 * Loop thru IPv6 extended headers to get upper
826 * layer header / frag.
831 * Same as in IPv4, we can forward a 'bad'
832 * packet without accounting.
835 M_CHECK(sizeof(struct tcphdr));
838 M_CHECK(sizeof(struct udphdr));
841 M_CHECK(sizeof(struct sctphdr));
844 /* Loop until 'real' upper layer headers */
845 case IPPROTO_HOPOPTS:
846 case IPPROTO_ROUTING:
847 case IPPROTO_DSTOPTS:
848 M_CHECK(sizeof(struct ip6_ext));
849 ip6e = (struct ip6_ext *)(mtod(m, caddr_t) +
851 upper_proto = ip6e->ip6e_nxt;
852 hdr_off = (ip6e->ip6e_len + 1) << 3;
855 /* RFC4302, can be before DSTOPTS */
857 M_CHECK(sizeof(struct ip6_ext));
858 ip6e = (struct ip6_ext *)(mtod(m, caddr_t) +
860 upper_proto = ip6e->ip6e_nxt;
861 hdr_off = (ip6e->ip6e_len + 2) << 2;
864 case IPPROTO_FRAGMENT:
865 M_CHECK(sizeof(struct ip6_frag));
866 ip6f = (struct ip6_frag *)(mtod(m, caddr_t) +
868 upper_proto = ip6f->ip6f_nxt;
869 hdr_off = sizeof(struct ip6_frag);
871 flags |= NG_NETFLOW_IS_FRAG;
879 * Any unknown header (new extension or IPv6/IPv4
880 * header for tunnels) ends loop.
896 /* Just in case of real reallocation in M_CHECK() / m_pullup() */
898 atomic_fetchadd_32(&priv->info.nfinfo_realloc_mbuf, 1);
899 /* Restore ip/ipv6 pointer */
901 ip = (struct ip *)(mtod(m, caddr_t) + l3_off);
902 else if (ip6 != NULL)
903 ip6 = (struct ip6_hdr *)(mtod(m, caddr_t) + l3_off);
906 upper_ptr = (caddr_t)(mtod(m, caddr_t) + off);
908 /* Determine packet input interface. Prefer configured. */
910 if (hook == iface->out || iface->info.ifinfo_index == 0) {
911 if (m->m_pkthdr.rcvif != NULL)
912 src_if_index = m->m_pkthdr.rcvif->if_index;
914 src_if_index = iface->info.ifinfo_index;
916 /* Check packet FIB */
918 if (fib >= priv->maxfibs) {
919 CTR2(KTR_NET, "ng_netflow_rcvdata(): packet fib %d is out of "
920 "range of available fibs: 0 .. %d",
925 if ((fe = priv_to_fib(priv, fib)) == NULL) {
927 if (ng_netflow_fib_init(priv, fib) != 0) {
928 /* malloc() failed */
932 fe = priv_to_fib(priv, fib);
936 error = ng_netflow_flow_add(priv, fe, ip, upper_ptr,
937 upper_proto, flags, src_if_index);
939 else if (ip6 != NULL)
940 error = ng_netflow_flow6_add(priv, fe, ip6, upper_ptr,
941 upper_proto, flags, src_if_index);
950 /* Accounting failure */
952 atomic_fetchadd_32(&priv->info.nfinfo_spackets,
954 priv->info.nfinfo_sbytes += m_length(m, NULL);
955 } else if (ip6 != NULL) {
956 atomic_fetchadd_32(&priv->info.nfinfo_spackets6,
958 priv->info.nfinfo_sbytes6 += m_length(m, NULL);
962 /* XXX: error gets overwritten here */
963 NG_FWD_NEW_DATA(error, item, out, m);
975 /* We will be shut down in a moment */
977 ng_netflow_close(node_p node)
979 const priv_p priv = NG_NODE_PRIVATE(node);
981 callout_drain(&priv->exp_callout);
982 ng_netflow_cache_flush(priv);
987 /* Do local shutdown processing. */
989 ng_netflow_rmnode(node_p node)
991 const priv_p priv = NG_NODE_PRIVATE(node);
993 NG_NODE_SET_PRIVATE(node, NULL);
994 NG_NODE_UNREF(priv->node);
996 free(priv->fib_data, M_NETGRAPH);
997 free(priv, M_NETGRAPH);
1002 /* Hook disconnection. */
1004 ng_netflow_disconnect(hook_p hook)
1006 node_p node = NG_HOOK_NODE(hook);
1007 priv_p priv = NG_NODE_PRIVATE(node);
1008 iface_p iface = NG_HOOK_PRIVATE(hook);
1010 if (iface != NULL) {
1011 if (iface->hook == hook)
1013 if (iface->out == hook)
1017 /* if export hook disconnected stop running expire(). */
1018 if (hook == priv->export) {
1019 if (priv->export9 == NULL)
1020 callout_drain(&priv->exp_callout);
1021 priv->export = NULL;
1024 if (hook == priv->export9) {
1025 if (priv->export == NULL)
1026 callout_drain(&priv->exp_callout);
1027 priv->export9 = NULL;
1030 /* Removal of the last link destroys the node. */
1031 if (NG_NODE_NUMHOOKS(node) == 0)
1032 ng_rmnode_self(node);