2 * The mrouted program is covered by the license in the accompanying file
3 * named "LICENSE". Use of the mrouted program represents acceptance of
4 * the terms and conditions listed in that file.
6 * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
7 * Leland Stanford Junior University.
10 * vif.c,v 3.8.4.56.2.1 1999/01/20 05:18:50 fenner Exp
12 * $FreeBSD: src/usr.sbin/mrouted/vif.c,v 1.15 1999/08/28 01:17:09 peter Exp $
21 struct uvif uvifs[MAXVIFS]; /* array of virtual interfaces */
22 vifi_t numvifs; /* number of vifs in use */
23 int vifs_down; /* 1=>some interfaces are down */
24 int phys_vif; /* An enabled vif */
25 int udp_socket; /* Since the honkin' kernel doesn't support */
26 /* ioctls on raw IP sockets, we need a UDP */
27 /* socket as well as our IGMP (raw) socket. */
29 int vifs_with_neighbors; /* == 1 if I am a leaf */
34 struct listaddr *nbrs[MAXNBRS]; /* array of neighbors */
43 * Forward declarations.
45 static void start_vif(vifi_t vifi);
46 static void start_vif2(vifi_t vifi);
47 static void stop_vif(vifi_t vifi);
48 static void age_old_hosts(void);
49 static void send_probe_on_vif(struct uvif *v);
50 static void send_query(struct uvif *v);
51 static int info_version(char *p, int plen);
52 static void DelVif(void *arg);
53 static int SetTimer(vifi_t vifi, struct listaddr *g);
54 static int DeleteTimer(int id);
55 static void SendQuery(void *arg);
56 static int SetQueryTimer(struct listaddr *g, vifi_t vifi, int to_expire,
61 * Initialize the virtual interfaces, but do not install
62 * them in the kernel. Start routing on all vifs that are
63 * not down or disabled.
70 int enabled_vifs, enabled_phyints;
71 extern char *configfilename;
74 vifs_with_neighbors = 0;
78 * Configure the vifs based on the interface configuration of the
79 * the kernel and the contents of the configuration file.
80 * (Open a UDP socket for ioctl use in the config procedures if
81 * the kernel can't handle IOCTL's on the IGMP socket.)
83 #ifdef IOCTL_OK_ON_RAW_SOCKET
84 udp_socket = igmp_socket;
86 if ((udp_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
87 dolog(LOG_ERR, errno, "UDP socket");
89 dolog(LOG_INFO,0,"Getting vifs from kernel interfaces");
90 config_vifs_from_kernel();
91 dolog(LOG_INFO,0,"Getting vifs from %s",configfilename);
92 config_vifs_from_file();
95 * Quit if there are fewer than two enabled vifs.
100 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
101 if (!(v->uv_flags & VIFF_DISABLED)) {
103 if (!(v->uv_flags & VIFF_TUNNEL)) {
110 if (enabled_vifs < 2)
111 dolog(LOG_ERR, 0, "can't forward: %s",
112 enabled_vifs == 0 ? "no enabled vifs" : "only one enabled vif");
114 if (enabled_phyints == 0)
115 dolog(LOG_WARNING, 0,
116 "no enabled interfaces, forwarding via tunnels only");
118 dolog(LOG_INFO, 0, "Installing vifs in mrouted...");
119 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
120 if (!(v->uv_flags & VIFF_DISABLED)) {
121 if (!(v->uv_flags & VIFF_DOWN)) {
122 if (v->uv_flags & VIFF_TUNNEL)
123 dolog(LOG_INFO, 0, "vif #%d, tunnel %s -> %s", vifi,
124 inet_fmt(v->uv_lcl_addr, s1),
125 inet_fmt(v->uv_rmt_addr, s2));
127 dolog(LOG_INFO, 0, "vif #%d, phyint %s", vifi,
128 inet_fmt(v->uv_lcl_addr, s1));
130 } else dolog(LOG_INFO, 0,
131 "%s is not yet up; vif #%u not in service",
138 * Initialize the passed vif with all appropriate default values.
139 * "t" is true if a tunnel, or false if a phyint.
142 zero_vif(struct uvif *v, int t)
146 v->uv_metric = DEFAULT_METRIC;
148 v->uv_threshold = DEFAULT_THRESHOLD;
149 v->uv_rate_limit = t ? DEFAULT_TUN_RATE_LIMIT : DEFAULT_PHY_RATE_LIMIT;
152 v->uv_dst_addr = t ? 0 : dvmrp_group;
154 v->uv_subnetmask = 0;
155 v->uv_subnetbcast = 0;
156 v->uv_name[0] = '\0';
158 v->uv_neighbors = NULL;
159 NBRM_CLRALL(v->uv_nbrmap);
160 v->uv_querier = NULL;
161 v->uv_igmpv1_warn = 0;
162 v->uv_prune_lifetime = 0;
163 v->uv_leaf_timer = 0;
167 v->uv_blasterbuf = NULL;
168 v->uv_blastercur = NULL;
169 v->uv_blasterend = NULL;
170 v->uv_blasterlen = 0;
171 v->uv_blastertimer = 0;
178 * Start routing on all virtual interfaces that are not down or
179 * administratively disabled.
182 init_installvifs(void)
187 dolog(LOG_INFO, 0, "Installing vifs in kernel...");
188 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
189 if (!(v->uv_flags & VIFF_DISABLED)) {
190 if (!(v->uv_flags & VIFF_DOWN)) {
191 if (v->uv_flags & VIFF_TUNNEL)
192 dolog(LOG_INFO, 0, "vif #%d, tunnel %s -> %s", vifi,
193 inet_fmt(v->uv_lcl_addr, s1),
194 inet_fmt(v->uv_rmt_addr, s2));
196 dolog(LOG_INFO, 0, "vif #%d, phyint %s", vifi,
197 inet_fmt(v->uv_lcl_addr, s1));
198 k_add_vif(vifi, &uvifs[vifi]);
199 } else dolog(LOG_INFO, 0,
200 "%s is not yet up; vif #%u not in service",
207 * See if any interfaces have changed from up state to down, or vice versa,
208 * including any non-multicast-capable interfaces that are in use as local
209 * tunnel end-points. Ignore interfaces that have been administratively
213 check_vif_state(void)
218 static int checking_vifs = 0;
221 * If we get an error while checking, (e.g. two interfaces go down
222 * at once, and we decide to send a prune out one of the failed ones)
223 * then don't go into an infinite loop!
230 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
232 if (v->uv_flags & VIFF_DISABLED) continue;
234 strncpy(ifr.ifr_name, v->uv_name, IFNAMSIZ);
235 if (ioctl(udp_socket, SIOCGIFFLAGS, (char *)&ifr) < 0)
236 dolog(LOG_ERR, errno,
237 "ioctl SIOCGIFFLAGS for %s", ifr.ifr_name);
239 if (v->uv_flags & VIFF_DOWN) {
240 if (ifr.ifr_flags & IFF_UP) {
242 "%s has come up; vif #%u now in service",
244 v->uv_flags &= ~VIFF_DOWN;
247 else vifs_down = TRUE;
250 if (!(ifr.ifr_flags & IFF_UP)) {
252 "%s has gone down; vif #%u taken out of service",
255 v->uv_flags |= VIFF_DOWN;
264 * Send a DVMRP message on the specified vif. If DVMRP messages are
265 * to be encapsulated and sent "inside" the tunnel, use the special
266 * encapsulator. If it's not a tunnel or DVMRP messages are to be
267 * sent "beside" the tunnel, as required by earlier versions of mrouted,
268 * then just send the message.
271 send_on_vif(struct uvif *v, u_int32 dst, int code, int datalen)
273 u_int32 group = htonl(MROUTED_LEVEL |
274 ((v->uv_flags & VIFF_LEAF) ? 0 : LEAF_FLAGS));
277 * The UNIX kernel will not decapsulate unicasts.
278 * Therefore, we don't send encapsulated unicasts.
280 if ((v->uv_flags & (VIFF_TUNNEL|VIFF_OTUNNEL)) == VIFF_TUNNEL &&
281 ((dst == 0) || IN_MULTICAST(ntohl(dst))))
282 send_ipip(v->uv_lcl_addr, dst ? dst : dvmrp_group, IGMP_DVMRP,
283 code, group, datalen, v);
285 send_igmp(v->uv_lcl_addr, dst ? dst : v->uv_dst_addr, IGMP_DVMRP,
286 code, group, datalen);
291 * Send a probe message on vif v
294 send_probe_on_vif(struct uvif *v)
298 struct listaddr *nbr;
301 if ((v->uv_flags & VIFF_PASSIVE && v->uv_neighbors == NULL) ||
302 (v->uv_flags & VIFF_FORCE_LEAF))
305 p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
307 for (i = 0; i < 4; i++)
308 *p++ = ((char *)&(dvmrp_genid))[i];
312 * add the neighbor list on the interface to the message
314 nbr = v->uv_neighbors;
317 for (i = 0; i < 4; i++)
318 *p++ = ((char *)&nbr->al_addr)[i];
323 send_on_vif(v, 0, DVMRP_PROBE, datalen);
327 send_query(struct uvif *v)
330 dolog(LOG_DEBUG, 0, "sending %squery on vif %d",
331 (v->uv_flags & VIFF_IGMPV1) ? "v1 " : "",
333 send_igmp(v->uv_lcl_addr, allhosts_group,
334 IGMP_MEMBERSHIP_QUERY,
335 (v->uv_flags & VIFF_IGMPV1) ? 0 :
336 IGMP_MAX_HOST_REPORT_DELAY * IGMP_TIMER_SCALE, 0, 0);
340 * Add a vifi to the kernel and start routing on it.
343 start_vif(vifi_t vifi)
346 * Install the interface in the kernel's vif structure.
348 k_add_vif(vifi, &uvifs[vifi]);
354 * Add a vifi to all the user-level data structures but don't add
355 * it to the kernel yet.
358 start_vif2(vifi_t vifi)
365 src = v->uv_lcl_addr;
368 * Update the existing route entries to take into account the new vif.
370 add_vif_to_routes(vifi);
372 if (!(v->uv_flags & VIFF_TUNNEL)) {
374 * Join the DVMRP multicast group on the interface.
375 * (This is not strictly necessary, since the kernel promiscuously
376 * receives IGMP packets addressed to ANY IP multicast group while
377 * multicast routing is enabled. However, joining the group allows
378 * this host to receive non-IGMP packets as well, such as 'pings'.)
380 k_join(dvmrp_group, src);
383 * Join the ALL-ROUTERS multicast group on the interface.
384 * This allows mtrace requests to loop back if they are run
385 * on the multicast router.
387 k_join(allrtrs_group, src);
390 * Install an entry in the routing table for the subnet to which
391 * the interface is connected.
393 start_route_updates();
394 update_route(v->uv_subnet, v->uv_subnetmask, 0, 0, vifi, NULL);
395 for (p = v->uv_addrs; p; p = p->pa_next) {
396 start_route_updates();
397 update_route(p->pa_subnet, p->pa_subnetmask, 0, 0, vifi, NULL);
401 * Until neighbors are discovered, assume responsibility for sending
402 * periodic group membership queries to the subnet. Send the first
405 v->uv_flags |= VIFF_QUERIER;
407 dolog(LOG_DEBUG, 0, "assuming querier duties on vif %d", vifi);
411 v->uv_leaf_timer = LEAF_CONFIRMATION_TIME;
414 * Send a probe via the new vif to look for neighbors.
416 send_probe_on_vif(v);
420 * Stop routing on the specified virtual interface.
423 stop_vif(vifi_t vifi)
431 if (!(v->uv_flags & VIFF_TUNNEL)) {
433 * Depart from the DVMRP multicast group on the interface.
435 k_leave(dvmrp_group, v->uv_lcl_addr);
438 * Depart from the ALL-ROUTERS multicast group on the interface.
440 k_leave(allrtrs_group, v->uv_lcl_addr);
443 * Update the entry in the routing table for the subnet to which
444 * the interface is connected, to take into account the interface
447 start_route_updates();
448 update_route(v->uv_subnet, v->uv_subnetmask, UNREACHABLE, 0, vifi, NULL);
449 for (p = v->uv_addrs; p; p = p->pa_next) {
450 start_route_updates();
451 update_route(p->pa_subnet, p->pa_subnetmask, UNREACHABLE, 0, vifi, NULL);
455 * Discard all group addresses. (No need to tell kernel;
456 * the k_del_vif() call, below, will clean up kernel state.)
458 while (v->uv_groups != NULL) {
460 v->uv_groups = a->al_next;
465 dolog(LOG_DEBUG, 0, "releasing querier duties on vif %d", vifi);
466 v->uv_flags &= ~VIFF_QUERIER;
470 * Update the existing route entries to take into account the vif failure.
472 delete_vif_from_routes(vifi);
475 * Delete the interface from the kernel's vif structure.
480 * Discard all neighbor addresses.
482 if (!NBRM_ISEMPTY(v->uv_nbrmap))
483 vifs_with_neighbors--;
485 while (v->uv_neighbors != NULL) {
487 v->uv_neighbors = a->al_next;
488 nbrs[a->al_index] = NULL;
491 NBRM_CLRALL(v->uv_nbrmap);
496 * stop routing on all vifs
506 for (vifi = 0; vifi < numvifs; vifi++) {
508 while (v->uv_groups != NULL) {
510 v->uv_groups = a->al_next;
513 while (v->uv_neighbors != NULL) {
515 v->uv_neighbors = a->al_next;
516 nbrs[a->al_index] = NULL;
519 while (v->uv_acl != NULL) {
521 v->uv_acl = acl->acl_next;
529 * Find the virtual interface from which an incoming packet arrived,
530 * based on the packet's source and destination IP addresses.
533 find_vif(u_int32 src, u_int32 dst)
539 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
540 if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED))) {
541 if (v->uv_flags & VIFF_TUNNEL) {
542 if (src == v->uv_rmt_addr && (dst == v->uv_lcl_addr ||
547 if ((src & v->uv_subnetmask) == v->uv_subnet &&
548 ((v->uv_subnetmask == 0xffffffff) ||
549 (src != v->uv_subnetbcast)))
551 for (p=v->uv_addrs; p; p=p->pa_next) {
552 if ((src & p->pa_subnetmask) == p->pa_subnet &&
553 ((p->pa_subnetmask == 0xffffffff) ||
554 (src != p->pa_subnetbcast)))
571 * Decrement the old-hosts-present timer for each
572 * active group on each vif.
574 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++)
575 for (g = v->uv_groups; g != NULL; g = g->al_next)
582 * Send group membership queries on each interface for which I am querier.
583 * Note that technically, there should be a timer per interface, as the
584 * dynamics of querier election can cause the "right" time to send a
585 * query to be different on different interfaces. However, this simple
586 * implementation only ever sends queries sooner than the "right" time,
587 * so can not cause loss of membership (but can send more packets than
596 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
597 if (v->uv_flags & VIFF_QUERIER) {
605 * Process an incoming host membership query. Warn about
606 * IGMP version mismatches, perform querier election, and
607 * handle group-specific queries when we're not the querier.
610 accept_membership_query(u_int32 src, u_int32 dst, u_int32 group, int tmo)
615 if ((vifi = find_vif(src, dst)) == NO_VIF ||
616 (uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
618 "ignoring group membership query from non-adjacent host %s",
625 if ((tmo == 0 && !(v->uv_flags & VIFF_IGMPV1)) ||
626 (tmo != 0 && (v->uv_flags & VIFF_IGMPV1))) {
630 * Exponentially back-off warning rate
632 i = ++v->uv_igmpv1_warn;
633 while (i && !(i & 1))
636 dolog(LOG_WARNING, 0, "%s %s on vif %d, %s",
637 tmo == 0 ? "Received IGMPv1 report from"
638 : "Received IGMPv2 report from",
641 tmo == 0 ? "please configure vif for IGMPv1"
642 : "but I am configured for IGMPv1");
645 if (v->uv_querier == NULL || v->uv_querier->al_addr != src) {
648 * - A query from a new querier, with a lower source address
649 * than the current querier (who might be me)
650 * - A query from a new router that just started up and doesn't
651 * know who the querier is.
653 if (ntohl(src) < (v->uv_querier ? ntohl(v->uv_querier->al_addr)
654 : ntohl(v->uv_lcl_addr))) {
656 dolog(LOG_DEBUG, 0, "new querier %s (was %s) on vif %d",
658 v->uv_querier ? inet_fmt(v->uv_querier->al_addr, s2) :
660 if (!v->uv_querier) {
661 v->uv_querier = (struct listaddr *)
662 malloc(sizeof(struct listaddr));
663 v->uv_flags &= ~VIFF_QUERIER;
665 time(&v->uv_querier->al_ctime);
666 v->uv_querier->al_addr = src;
669 dolog(LOG_DEBUG, 0, "ignoring query from %s; querier on vif %d is still %s",
670 inet_fmt(src, s1), vifi,
671 v->uv_querier ? inet_fmt(v->uv_querier->al_addr, s2) :
679 * Reset the timer since we've received a query.
681 if (v->uv_querier && src == v->uv_querier->al_addr)
682 v->uv_querier->al_timer = 0;
685 * If this is a Group-Specific query which we did not source,
686 * we must set our membership timer to [Last Member Query Count] *
687 * the [Max Response Time] in the packet.
689 if (!(v->uv_flags & (VIFF_IGMPV1|VIFF_QUERIER)) && group != 0 &&
690 src != v->uv_lcl_addr) {
695 "%s for %s from %s on vif %d, timer %d",
696 "Group-specific membership query",
697 inet_fmt(group, s2), inet_fmt(src, s1), vifi, tmo);
699 for (g = v->uv_groups; g != NULL; g = g->al_next) {
700 if (group == g->al_addr && g->al_query == 0) {
701 /* setup a timeout to remove the group membership */
703 g->al_timerid = DeleteTimer(g->al_timerid);
704 g->al_timer = IGMP_LAST_MEMBER_QUERY_COUNT *
705 tmo / IGMP_TIMER_SCALE;
706 /* use al_query to record our presence in last-member state */
708 g->al_timerid = SetTimer(vifi, g);
711 "timer for grp %s on vif %d set to %d",
712 inet_fmt(group, s2), vifi, g->al_timer);
720 * Process an incoming group membership report.
723 accept_group_report(u_int32 src, u_int32 dst, u_int32 group, int r_type)
729 if ((vifi = find_vif(src, dst)) == NO_VIF ||
730 (uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
732 "ignoring group membership report from non-adjacent host %s",
740 * Look for the group in our group list; if found, reset its timer.
742 for (g = v->uv_groups; g != NULL; g = g->al_next) {
743 if (group == g->al_addr) {
744 if (r_type == IGMP_V1_MEMBERSHIP_REPORT)
745 g->al_old = OLD_AGE_THRESHOLD;
747 g->al_reporter = src;
749 /** delete old timers, set a timer for expiration **/
750 g->al_timer = IGMP_GROUP_MEMBERSHIP_INTERVAL;
752 g->al_query = DeleteTimer(g->al_query);
754 g->al_timerid = DeleteTimer(g->al_timerid);
755 g->al_timerid = SetTimer(vifi, g);
761 * If not found, add it to the list and update kernel cache.
764 g = (struct listaddr *)malloc(sizeof(struct listaddr));
766 dolog(LOG_ERR, 0, "ran out of memory"); /* fatal */
769 if (r_type == IGMP_V1_MEMBERSHIP_REPORT)
770 g->al_old = OLD_AGE_THRESHOLD;
774 /** set a timer for expiration **/
776 g->al_timer = IGMP_GROUP_MEMBERSHIP_INTERVAL;
777 g->al_reporter = src;
778 g->al_timerid = SetTimer(vifi, g);
779 g->al_next = v->uv_groups;
783 update_lclgrp(vifi, group);
787 * Check if a graft is necessary for this group
789 chkgrp_graft(vifi, group);
793 * Process an incoming IGMPv2 Leave Group message.
796 accept_leave_message(u_int32 src, u_int32 dst, u_int32 group)
802 if ((vifi = find_vif(src, dst)) == NO_VIF ||
803 (uvifs[vifi].uv_flags & VIFF_TUNNEL)) {
805 "ignoring group leave report from non-adjacent host %s",
812 if (!(v->uv_flags & VIFF_QUERIER) || (v->uv_flags & VIFF_IGMPV1))
816 * Look for the group in our group list in order to set up a short-timeout
819 for (g = v->uv_groups; g != NULL; g = g->al_next) {
820 if (group == g->al_addr) {
823 "[vif.c, _accept_leave_message] %d %d \n",
824 g->al_old, g->al_query);
826 /* Ignore the leave message if there are old hosts present */
830 /* still waiting for a reply to a query, ignore the leave */
834 /** delete old timer set a timer for expiration **/
836 g->al_timerid = DeleteTimer(g->al_timerid);
838 #if IGMP_LAST_MEMBER_QUERY_COUNT != 2
839 This code needs to be updated to keep a counter of the number
840 of queries remaining.
842 /** send a group specific querry **/
843 g->al_timer = IGMP_LAST_MEMBER_QUERY_INTERVAL *
844 (IGMP_LAST_MEMBER_QUERY_COUNT + 1);
845 send_igmp(v->uv_lcl_addr, g->al_addr,
846 IGMP_MEMBERSHIP_QUERY,
847 IGMP_LAST_MEMBER_QUERY_INTERVAL * IGMP_TIMER_SCALE,
849 g->al_query = SetQueryTimer(g, vifi,
850 IGMP_LAST_MEMBER_QUERY_INTERVAL,
851 IGMP_LAST_MEMBER_QUERY_INTERVAL * IGMP_TIMER_SCALE);
852 g->al_timerid = SetTimer(vifi, g);
860 * Send a periodic probe on all vifs.
861 * Useful to determine one-way interfaces.
862 * Detect neighbor loss faster.
865 probe_for_neighbors(void)
870 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
871 if (!(v->uv_flags & (VIFF_DOWN|VIFF_DISABLED))) {
872 send_probe_on_vif(v);
879 * Send a list of all of our neighbors to the requestor, `src'.
882 accept_neighbor_request(u_int32 src, u_int32 dst)
889 u_int32 temp_addr, them = src;
891 #define PUT_ADDR(a) temp_addr = ntohl(a); \
892 *p++ = temp_addr >> 24; \
893 *p++ = (temp_addr >> 16) & 0xFF; \
894 *p++ = (temp_addr >> 8) & 0xFF; \
895 *p++ = temp_addr & 0xFF;
897 p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
900 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
901 if (v->uv_flags & VIFF_DISABLED)
906 for (la = v->uv_neighbors; la; la = la->al_next) {
908 /* Make sure that there's room for this neighbor... */
909 if (datalen + (ncount == NULL ? 4 + 3 + 4 : 4) > MAX_DVMRP_DATA_LEN) {
910 send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
911 htonl(MROUTED_LEVEL), datalen);
912 p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
917 /* Put out the header for this neighbor list... */
918 if (ncount == NULL) {
919 PUT_ADDR(v->uv_lcl_addr);
921 *p++ = v->uv_threshold;
927 PUT_ADDR(la->al_addr);
934 send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS,
935 htonl(MROUTED_LEVEL), datalen);
939 * Send a list of all of our neighbors to the requestor, `src'.
942 accept_neighbor_request2(u_int32 src, u_int32 dst)
951 p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
954 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
955 u_short vflags = v->uv_flags;
958 if (vflags & VIFF_TUNNEL)
959 rflags |= DVMRP_NF_TUNNEL;
960 if (vflags & VIFF_SRCRT)
961 rflags |= DVMRP_NF_SRCRT;
962 if (vflags & VIFF_DOWN)
963 rflags |= DVMRP_NF_DOWN;
964 if (vflags & VIFF_DISABLED)
965 rflags |= DVMRP_NF_DISABLED;
966 if (vflags & VIFF_QUERIER)
967 rflags |= DVMRP_NF_QUERIER;
968 if (vflags & VIFF_LEAF)
969 rflags |= DVMRP_NF_LEAF;
971 la = v->uv_neighbors;
974 * include down & disabled interfaces and interfaces on
977 if (rflags & DVMRP_NF_TUNNEL)
978 rflags |= DVMRP_NF_DOWN;
979 if (datalen > MAX_DVMRP_DATA_LEN - 12) {
980 send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
981 htonl(MROUTED_LEVEL), datalen);
982 p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
985 *(u_int*)p = v->uv_lcl_addr;
988 *p++ = v->uv_threshold;
991 *(u_int*)p = v->uv_rmt_addr;
995 for ( ; la; la = la->al_next) {
996 /* Make sure that there's room for this neighbor... */
997 if (datalen + (ncount == NULL ? 4+4+4 : 4) > MAX_DVMRP_DATA_LEN) {
998 send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
999 htonl(MROUTED_LEVEL), datalen);
1000 p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
1004 /* Put out the header for this neighbor list... */
1005 if (ncount == NULL) {
1006 /* If it's a one-way tunnel, mark it down. */
1007 if (rflags & DVMRP_NF_TUNNEL && la->al_flags & NBRF_ONEWAY)
1008 rflags |= DVMRP_NF_DOWN;
1009 *(u_int*)p = v->uv_lcl_addr;
1011 *p++ = v->uv_metric;
1012 *p++ = v->uv_threshold;
1018 /* Don't report one-way peering on phyint at all */
1019 if (!(rflags & DVMRP_NF_TUNNEL) && la->al_flags & NBRF_ONEWAY)
1021 *(u_int*)p = la->al_addr;
1027 *(u_int*)p = v->uv_rmt_addr;
1035 send_igmp(INADDR_ANY, them, IGMP_DVMRP, DVMRP_NEIGHBORS2,
1036 htonl(MROUTED_LEVEL), datalen);
1040 accept_info_request(u_int32 src, u_int32 dst, u_char *p, int datalen)
1046 q = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
1048 /* To be general, this must deal properly with breaking up over-sized
1049 * packets. That implies passing a length to each function, and
1050 * allowing each function to request to be called again. Right now,
1051 * we're only implementing the one thing we are positive will fit into
1052 * a single packet, so we wimp out.
1054 while (datalen > 0) {
1057 case DVMRP_INFO_VERSION:
1058 len = info_version(q, RECV_BUF_SIZE-(q-(u_char *)send_buf));
1061 case DVMRP_INFO_NEIGHBORS:
1063 dolog(LOG_INFO, 0, "ignoring unknown info type %d", *p);
1069 len = (*(p+1) + 1) * 4;
1075 send_igmp(INADDR_ANY, src, IGMP_DVMRP, DVMRP_INFO_REPLY,
1076 htonl(MROUTED_LEVEL), outlen);
1080 * Information response -- return version string
1083 info_version(char *p, int plen)
1086 extern char versionstring[];
1088 *p++ = DVMRP_INFO_VERSION;
1089 p++; /* skip over length */
1090 *p++ = 0; /* zero out */
1091 *p++ = 0; /* reserved fields */
1092 strncpy(p, versionstring, plen - 4);
1095 len = strlen(versionstring);
1096 return ((len + 3) / 4);
1100 * Process an incoming neighbor-list message.
1103 accept_neighbors(u_int32 src, u_int32 dst, u_char *p, int datalen,
1106 dolog(LOG_INFO, 0, "ignoring spurious DVMRP neighbor list from %s to %s",
1107 inet_fmt(src, s1), inet_fmt(dst, s2));
1112 * Process an incoming neighbor-list message.
1115 accept_neighbors2(u_int32 src, u_int32 dst, u_char *p, int datalen,
1119 dolog(LOG_DEBUG, 0, "ignoring spurious DVMRP neighbor list2 from %s to %s",
1120 inet_fmt(src, s1), inet_fmt(dst, s2));
1124 * Process an incoming info reply message.
1127 accept_info_reply(u_int32 src, u_int32 dst, u_char *p, int datalen)
1130 dolog(LOG_DEBUG, 0, "ignoring spurious DVMRP info reply from %s to %s",
1131 inet_fmt(src, s1), inet_fmt(dst, s2));
1136 * Update the neighbor entry for neighbor 'addr' on vif 'vifi'.
1137 * 'msgtype' is the type of DVMRP message received from the neighbor.
1138 * Return the neighbor entry if 'addr' is a valid neighbor, FALSE otherwise.
1141 update_neighbor(vifi_t vifi, u_int32 addr, int msgtype, char *p, int datalen,
1146 int pv = level & 0xff;
1147 int mv = (level >> 8) & 0xff;
1149 int in_router_list = 0;
1152 u_int32 send_tables = 0;
1154 int do_reset = FALSE;
1159 * Confirm that 'addr' is a valid neighbor address on vif 'vifi'.
1160 * IT IS ASSUMED that this was preceded by a call to find_vif(), which
1161 * checks that 'addr' is either a valid remote tunnel endpoint or a
1162 * non-broadcast address belonging to a directly-connected subnet.
1163 * Therefore, here we check only that 'addr' is not our own address
1164 * (due to an impostor or erroneous loopback) or an address of the form
1165 * {subnet,0} ("the unknown host"). These checks are not performed in
1166 * find_vif() because those types of address are acceptable for some
1167 * types of IGMP message (such as group membership reports).
1169 if (!(v->uv_flags & VIFF_TUNNEL) &&
1170 (addr == v->uv_lcl_addr ||
1171 addr == v->uv_subnet )) {
1172 dolog(LOG_WARNING, 0,
1173 "received DVMRP message from %s: %s",
1174 (addr == v->uv_lcl_addr) ? "self (check device loopback)" :
1175 "'the unknown host'",
1176 inet_fmt(addr, s1));
1181 * Ignore all neighbors on vifs forced into leaf mode
1183 if (v->uv_flags & VIFF_FORCE_LEAF) {
1188 * mrouted's version 3.3 and later include the generation ID
1189 * and the list of neighbors on the vif in their probe messages.
1191 if (msgtype == DVMRP_PROBE && ((pv == 3 && mv > 2) ||
1192 (pv > 3 && pv < 10))) {
1195 IF_DEBUG(DEBUG_PEER)
1196 dolog(LOG_DEBUG, 0, "checking probe from %s (%d.%d) on vif %d",
1197 inet_fmt(addr, s1), pv, mv, vifi);
1200 dolog(LOG_WARNING, 0,
1201 "received truncated probe message from %s (len %d)",
1202 inet_fmt(addr, s1), datalen);
1208 for (i = 0; i < 4; i++)
1209 ((char *)&genid)[i] = *p++;
1212 while (datalen > 0) {
1214 dolog(LOG_WARNING, 0,
1215 "received truncated probe message from %s (len %d)",
1216 inet_fmt(addr, s1), datalen);
1219 for (i = 0; i < 4; i++)
1220 ((char *)&router)[i] = *p++;
1223 if (router == v->uv_lcl_addr) {
1230 if ((pv == 3 && mv == 255) || (pv > 3 && pv < 10))
1234 * Look for addr in list of neighbors.
1236 for (n = v->uv_neighbors; n != NULL; n = n->al_next) {
1237 if (addr == n->al_addr) {
1246 * If this neighbor follows the DVMRP spec, start the probe
1247 * handshake. If not, then it doesn't require the probe
1248 * handshake, so establish the peering immediately.
1250 if (dvmrpspec && (msgtype != DVMRP_PROBE))
1253 for (i = 0; i < MAXNBRS; i++)
1254 if (nbrs[i] == NULL)
1258 /* XXX This is a severe new restriction. */
1259 /* XXX want extensible bitmaps! */
1260 dolog(LOG_ERR, 0, "Can't handle %dth neighbor %s on vif %d!",
1261 MAXNBRS, inet_fmt(addr, s1), vifi);
1266 * Add it to our list of neighbors.
1268 IF_DEBUG(DEBUG_PEER)
1269 dolog(LOG_DEBUG, 0, "New neighbor %s on vif %d v%d.%d nf 0x%02x idx %d",
1270 inet_fmt(addr, s1), vifi, level & 0xff, (level >> 8) & 0xff,
1271 (level >> 16) & 0xff, i);
1273 n = (struct listaddr *)malloc(sizeof(struct listaddr));
1275 dolog(LOG_ERR, 0, "ran out of memory"); /* fatal */
1280 n->al_genid = has_genid ? genid : 0;
1286 n->al_flags = has_genid ? NBRF_GENID : 0;
1287 n->al_next = v->uv_neighbors;
1288 v->uv_neighbors = n;
1291 * If we are not configured to peer with non-pruning routers,
1292 * check the deprecated "I-know-how-to-prune" bit. This bit
1293 * was MBZ in early mrouted implementations (<3.5) and is required
1294 * to be set by the DVMRPv3 specification.
1296 if (!(v->uv_flags & VIFF_ALLOW_NONPRUNERS) &&
1297 !((level & 0x020000) || (pv == 3 && mv < 5))) {
1298 n->al_flags |= NBRF_TOOOLD;
1302 * If this router implements the DVMRPv3 spec, then don't peer
1303 * with him if we haven't yet established a bidirectional connection.
1306 if (!in_router_list) {
1307 IF_DEBUG(DEBUG_PEER)
1308 dolog(LOG_DEBUG, 0, "waiting for probe from %s with my addr",
1309 inet_fmt(addr, s1));
1310 n->al_flags |= NBRF_WAITING;
1315 if (n->al_flags & NBRF_DONTPEER) {
1316 IF_DEBUG(DEBUG_PEER)
1317 dolog(LOG_DEBUG, 0, "not peering with %s on vif %d because %x",
1318 inet_fmt(addr, s1), vifi, n->al_flags & NBRF_DONTPEER);
1323 * If we thought that we had no neighbors on this vif, send a route
1324 * report to the vif. If this is just a new neighbor on the same
1325 * vif, send the route report just to the new neighbor.
1327 if (NBRM_ISEMPTY(v->uv_nbrmap)) {
1328 send_tables = v->uv_dst_addr;
1329 vifs_with_neighbors++;
1335 NBRM_SET(i, v->uv_nbrmap);
1336 add_neighbor_to_routes(vifi, i);
1339 * Found it. Reset its timer.
1343 if (n->al_flags & NBRF_WAITING && msgtype == DVMRP_PROBE) {
1344 n->al_flags &= ~NBRF_WAITING;
1345 if (!in_router_list) {
1346 dolog(LOG_WARNING, 0, "possible one-way peering with %s on vif %d",
1347 inet_fmt(addr, s1), vifi);
1348 n->al_flags |= NBRF_ONEWAY;
1351 if (NBRM_ISEMPTY(v->uv_nbrmap)) {
1352 send_tables = v->uv_dst_addr;
1353 vifs_with_neighbors++;
1357 NBRM_SET(n->al_index, v->uv_nbrmap);
1358 add_neighbor_to_routes(vifi, n->al_index);
1359 IF_DEBUG(DEBUG_PEER)
1360 dolog(LOG_DEBUG, 0, "%s on vif %d exits WAITING",
1361 inet_fmt(addr, s1), vifi);
1365 if (n->al_flags & NBRF_ONEWAY && msgtype == DVMRP_PROBE) {
1366 if (in_router_list) {
1367 if (NBRM_ISEMPTY(v->uv_nbrmap))
1368 vifs_with_neighbors++;
1369 NBRM_SET(n->al_index, v->uv_nbrmap);
1370 add_neighbor_to_routes(vifi, n->al_index);
1371 dolog(LOG_NOTICE, 0, "peering with %s on vif %d is no longer one-way",
1372 inet_fmt(addr, s1), vifi);
1373 n->al_flags &= ~NBRF_ONEWAY;
1375 /* XXX rate-limited warning message? */
1376 IF_DEBUG(DEBUG_PEER)
1377 dolog(LOG_DEBUG, 0, "%s on vif %d is still ONEWAY",
1378 inet_fmt(addr, s1), vifi);
1383 * When peering with a genid-capable but pre-DVMRP spec peer,
1384 * we might bring up the peering with a route report and not
1385 * remember his genid. Assume that he doesn't send a route
1386 * report and then reboot before sending a probe.
1388 if (has_genid && !(n->al_flags & NBRF_GENID)) {
1389 n->al_flags |= NBRF_GENID;
1390 n->al_genid = genid;
1394 * update the neighbors version and protocol number and genid
1395 * if changed => router went down and came up,
1396 * so take action immediately.
1398 if ((n->al_pv != pv) ||
1400 (has_genid && n->al_genid != genid)) {
1403 IF_DEBUG(DEBUG_PEER)
1405 "version/genid change neighbor %s [old:%d.%d/%8x, new:%d.%d/%8x]",
1407 n->al_pv, n->al_mv, n->al_genid, pv, mv, genid);
1411 n->al_genid = genid;
1415 if ((pv == 3 && mv > 2) || (pv > 3 && pv < 10)) {
1416 if (!(n->al_flags & VIFF_ONEWAY) && has_genid && !in_router_list &&
1417 (time(NULL) - n->al_ctime > 20)) {
1418 if (NBRM_ISSET(n->al_index, v->uv_nbrmap)) {
1419 NBRM_CLR(n->al_index, v->uv_nbrmap);
1420 if (NBRM_ISEMPTY(v->uv_nbrmap))
1421 vifs_with_neighbors--;
1423 delete_neighbor_from_routes(addr, vifi, n->al_index);
1424 reset_neighbor_state(vifi, addr);
1425 dolog(LOG_WARNING, 0, "peering with %s on vif %d is one-way",
1426 inet_fmt(addr, s1), vifi);
1427 n->al_flags |= NBRF_ONEWAY;
1431 if (n->al_flags & NBRF_DONTPEER) {
1432 IF_DEBUG(DEBUG_PEER)
1433 dolog(LOG_DEBUG, 0, "not peering with %s on vif %d because %x",
1434 inet_fmt(addr, s1), vifi, n->al_flags & NBRF_DONTPEER);
1438 /* check "leaf" flag */
1441 reset_neighbor_state(vifi, addr);
1446 send_probe_on_vif(v);
1447 report(ALL_ROUTES, vifi, send_tables);
1449 v->uv_leaf_timer = 0;
1450 v->uv_flags &= ~VIFF_LEAF;
1457 * On every timer interrupt, advance the timer in each neighbor and
1458 * group entry on every vif.
1465 struct listaddr *a, *prev_a;
1468 for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v ) {
1469 if (v->uv_leaf_timer && (v->uv_leaf_timer -= TIMER_INTERVAL == 0)) {
1470 v->uv_flags |= VIFF_LEAF;
1473 for (prev_a = (struct listaddr *)&(v->uv_neighbors),
1474 a = v->uv_neighbors;
1476 prev_a = a, a = a->al_next) {
1480 if (((a->al_pv == 3) && (a->al_mv >= 3)) ||
1481 ((a->al_pv > 3) && (a->al_pv < 10)))
1482 exp_time = NEIGHBOR_EXPIRE_TIME;
1484 exp_time = OLD_NEIGHBOR_EXPIRE_TIME;
1486 if ((a->al_timer += TIMER_INTERVAL) < exp_time)
1489 IF_DEBUG(DEBUG_PEER)
1490 dolog(LOG_DEBUG, 0, "Neighbor %s (%d.%d) expired after %d seconds",
1491 inet_fmt(a->al_addr, s1), a->al_pv, a->al_mv, exp_time);
1494 * Neighbor has expired; delete it from the neighbor list,
1495 * delete it from the 'dominants' and 'subordinates arrays of
1496 * any route entries.
1498 NBRM_CLR(a->al_index, v->uv_nbrmap);
1499 nbrs[a->al_index] = NULL; /* XXX is it a good idea to reuse indxs? */
1502 prev_a->al_next = a->al_next;
1504 a = prev_a;/*XXX use ** */
1506 delete_neighbor_from_routes(addr, vifi, idx);
1507 reset_neighbor_state(vifi, addr);
1509 if (NBRM_ISEMPTY(v->uv_nbrmap))
1510 vifs_with_neighbors--;
1512 v->uv_leaf_timer = LEAF_CONFIRMATION_TIME;
1515 if (v->uv_querier &&
1516 (v->uv_querier->al_timer += TIMER_INTERVAL) >
1517 IGMP_OTHER_QUERIER_PRESENT_INTERVAL) {
1519 * The current querier has timed out. We must become the
1522 IF_DEBUG(DEBUG_IGMP)
1523 dolog(LOG_DEBUG, 0, "querier %s timed out",
1524 inet_fmt(v->uv_querier->al_addr, s1));
1525 free(v->uv_querier);
1526 v->uv_querier = NULL;
1527 v->uv_flags |= VIFF_QUERIER;
1534 * Returns the neighbor info struct for a given neighbor
1537 neighbor_info(vifi_t vifi, u_int32 addr)
1541 for (u = uvifs[vifi].uv_neighbors; u; u = u->al_next)
1542 if (u->al_addr == addr)
1548 static struct vnflags {
1552 { VIFF_DOWN, "down" },
1553 { VIFF_DISABLED, "disabled" },
1554 { VIFF_QUERIER, "querier" },
1555 { VIFF_ONEWAY, "one-way" },
1556 { VIFF_LEAF, "leaf" },
1557 { VIFF_IGMPV1, "IGMPv1" },
1558 { VIFF_REXMIT_PRUNES, "rexmit_prunes" },
1559 { VIFF_PASSIVE, "passive" },
1560 { VIFF_ALLOW_NONPRUNERS,"allow_nonpruners" },
1561 { VIFF_NOFLOOD, "noflood" },
1562 { VIFF_NOTRANSIT, "notransit" },
1563 { VIFF_BLASTER, "blaster" },
1564 { VIFF_FORCE_LEAF, "force_leaf" },
1565 { VIFF_OTUNNEL, "old-tunnel" },
1568 static struct vnflags nbrflags[] = {
1569 { NBRF_LEAF, "leaf" },
1570 { NBRF_GENID, "have-genid" },
1571 { NBRF_WAITING, "waiting" },
1572 { NBRF_ONEWAY, "one-way" },
1573 { NBRF_TOOOLD, "too old" },
1574 { NBRF_TOOMANYROUTES, "too many routes" },
1575 { NBRF_NOTPRUNING, "not pruning?" },
1579 * Print the contents of the uvifs array on file 'fp'.
1588 struct vif_acl *acl;
1590 struct sioc_vif_req v_req;
1595 fprintf(fp, "vifs_with_neighbors = %d\n", vifs_with_neighbors);
1597 if (vifs_with_neighbors == 1)
1598 fprintf(fp,"[This host is a leaf]\n\n");
1601 "\nVirtual Interface Table\n%s",
1602 "Vif Name Local-Address ");
1604 "M Thr Rate Flags\n");
1606 for (vifi = 0, v = uvifs; vifi < numvifs; vifi++, v++) {
1608 fprintf(fp, "%2u %6s %-15s %6s: %-18s %2u %3u %5u ",
1611 inet_fmt(v->uv_lcl_addr, s1),
1612 (v->uv_flags & VIFF_TUNNEL) ?
1615 (v->uv_flags & VIFF_TUNNEL) ?
1616 inet_fmt(v->uv_rmt_addr, s2) :
1617 inet_fmts(v->uv_subnet, v->uv_subnetmask, s3),
1622 for (i = 0; i < sizeof(vifflags) / sizeof(struct vnflags); i++)
1623 if (v->uv_flags & vifflags[i].vn_flag)
1624 fprintf(fp, " %s", vifflags[i].vn_name);
1628 fprintf(fp, " #routes: %d\n", v->uv_nroutes);
1630 if (v->uv_admetric != 0)
1631 fprintf(fp, " advert-metric %2u\n",
1634 label = "alternate subnets:";
1635 for (p = v->uv_addrs; p; p = p->pa_next) {
1636 fprintf(fp, " %18s %s\n", label,
1637 inet_fmts(p->pa_subnet, p->pa_subnetmask, s1));
1642 for (a = v->uv_neighbors; a != NULL; a = a->al_next) {
1643 fprintf(fp, " %6s %s (%d.%d) [%d]",
1644 label, inet_fmt(a->al_addr, s1), a->al_pv, a->al_mv,
1646 for (i = 0; i < sizeof(nbrflags) / sizeof(struct vnflags); i++)
1647 if (a->al_flags & nbrflags[i].vn_flag)
1648 fprintf(fp, " %s", nbrflags[i].vn_name);
1649 fprintf(fp, " up %s\n", scaletime(now - a->al_ctime));
1650 /*fprintf(fp, " #routes %d\n", a->al_nroutes);*/
1654 label = "group host (time left):";
1655 for (a = v->uv_groups; a != NULL; a = a->al_next) {
1656 fprintf(fp, " %23s %-15s %-15s (%s)\n",
1658 inet_fmt(a->al_addr, s1),
1659 inet_fmt(a->al_reporter, s2),
1660 scaletime(timer_leftTimer(a->al_timerid)));
1663 label = "boundaries:";
1664 for (acl = v->uv_acl; acl != NULL; acl = acl->acl_next) {
1665 fprintf(fp, " %11s %-18s\n", label,
1666 inet_fmts(acl->acl_addr, acl->acl_mask, s1));
1670 struct vf_element *vfe;
1673 sprintf(lbuf, "%5s %7s filter:",
1674 v->uv_filter->vf_flags & VFF_BIDIR ? "bidir"
1676 v->uv_filter->vf_type == VFT_ACCEPT ? "accept"
1679 for (vfe = v->uv_filter->vf_filter;
1680 vfe != NULL; vfe = vfe->vfe_next) {
1681 fprintf(fp, " %23s %-18s%s\n",
1683 inet_fmts(vfe->vfe_addr, vfe->vfe_mask, s1),
1684 vfe->vfe_flags & VFEF_EXACT ? " (exact)" : "");
1688 if (!(v->uv_flags & (VIFF_TUNNEL|VIFF_DOWN|VIFF_DISABLED))) {
1689 fprintf(fp, " IGMP querier: ");
1690 if (v->uv_querier == NULL)
1691 if (v->uv_flags & VIFF_QUERIER)
1692 fprintf(fp, "%-18s (this system)\n",
1693 inet_fmt(v->uv_lcl_addr, s1));
1695 fprintf(fp, "NONE - querier election failure?\n");
1697 fprintf(fp, "%-18s up %s last heard %s ago\n",
1698 inet_fmt(v->uv_querier->al_addr, s1),
1699 scaletime(now - v->uv_querier->al_ctime),
1700 scaletime(v->uv_querier->al_timer));
1702 if (v->uv_flags & VIFF_BLASTER)
1703 fprintf(fp, " blasterbuf size: %dk\n",
1704 v->uv_blasterlen / 1024);
1705 fprintf(fp, " Nbr bitmaps: 0x%08lx%08lx\n",/*XXX*/
1706 v->uv_nbrmap.hi, v->uv_nbrmap.lo);
1707 if (v->uv_prune_lifetime != 0)
1708 fprintf(fp, " Prune Lifetime: %d seconds\n",
1709 v->uv_prune_lifetime);
1713 if (ioctl(udp_socket, SIOCGETVIFCNT, (char *)&v_req) < 0) {
1714 dolog(LOG_WARNING, errno,
1715 "SIOCGETVIFCNT fails on vif %d", vifi);
1717 fprintf(fp, " pkts/bytes in : %lu/%lu\n",
1718 v_req.icount, v_req.ibytes);
1719 fprintf(fp, " pkts/bytes out: %lu/%lu\n",
1720 v_req.ocount, v_req.obytes);
1728 * Time out record of a group membership on a vif
1733 cbk_t *cbk = (cbk_t *)arg;
1734 vifi_t vifi = cbk->vifi;
1735 struct uvif *v = &uvifs[vifi];
1736 struct listaddr *a, **anp, *g = cbk->g;
1740 * delete all kernel cache entries with this group
1743 DeleteTimer(g->al_query);
1745 delete_lclgrp(vifi, g->al_addr);
1747 anp = &(v->uv_groups);
1748 while ((a = *anp) != NULL) {
1761 * Set a timer to delete the record of a group membership on a vif.
1764 SetTimer(vifi_t vifi, struct listaddr *g)
1768 cbk = (cbk_t *) malloc(sizeof(cbk_t));
1771 return timer_setTimer(g->al_timer, DelVif, cbk);
1775 * Delete a timer that was set above.
1780 timer_clearTimer(id);
1785 * Send a group-specific query.
1788 SendQuery(void *arg)
1790 cbk_t *cbk = (cbk_t *)arg;
1791 struct uvif *v = &uvifs[cbk->vifi];
1793 send_igmp(v->uv_lcl_addr, cbk->g->al_addr,
1794 IGMP_MEMBERSHIP_QUERY,
1795 cbk->q_time, cbk->g->al_addr, 0);
1796 cbk->g->al_query = 0;
1801 * Set a timer to send a group-specific query.
1804 SetQueryTimer(struct listaddr *g, vifi_t vifi, int to_expire, int q_time)
1808 cbk = (cbk_t *) malloc(sizeof(cbk_t));
1810 cbk->q_time = q_time;
1812 return timer_setTimer(to_expire, SendQuery, cbk);