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0fea3d5165
kernel IPv6 multicast routing support. pim6 dense mode daemon pim6 sparse mode daemon netstat support of IPv6 multicast routing statistics Merging to the current and testing with other existing multicast routers is done by Tatsuya Jinmei <jinmei@kame.net>, who writes and maintainances the base code in KAME distribution. Make world check and kernel build check was also successful.
323 lines
9.5 KiB
C
323 lines
9.5 KiB
C
/*
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* Copyright (c) 1998 by the University of Oregon.
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation in source and binary forms for lawful
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* purposes and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both
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* the copyright notice and this permission notice appear in supporting
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* documentation, and that any documentation, advertising materials,
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* and other materials related to such distribution and use acknowledge
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* that the software was developed by the University of Oregon.
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* The name of the University of Oregon may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THE UNIVERSITY OF OREGON DOES NOT MAKE ANY REPRESENTATIONS
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* ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS
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* PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
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* NON-INFRINGEMENT.
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*
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* IN NO EVENT SHALL UO, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
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* TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
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* THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Other copyrights might apply to parts of this software and are so
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* noted when applicable.
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*/
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/*
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* Questions concerning this software should be directed to
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* Kurt Windisch (kurtw@antc.uoregon.edu)
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*
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* $Id: timer.c,v 1.3 1999/09/15 07:45:12 jinmei Exp $
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*/
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/*
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* Part of this program has been derived from PIM sparse-mode pimd.
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* The pimd program is covered by the license in the accompanying file
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* named "LICENSE.pimd".
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*
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* The pimd program is COPYRIGHT 1998 by University of Southern California.
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*
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* Part of this program has been derived from mrouted.
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* The mrouted program is covered by the license in the accompanying file
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* named "LICENSE.mrouted".
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*
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* The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
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* Leland Stanford Junior University.
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*
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* $FreeBSD$
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*/
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#include "defs.h"
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/*
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* Global variables
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*/
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/*
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* Local functions definitions.
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*/
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/*
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* Local variables
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*/
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u_int16 unicast_routing_timer; /* Used to check periodically for any
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* change in the unicast routing.
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*/
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u_int16 unicast_routing_check_interval;
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u_int8 ucast_flag; /* Used to indicate there was a timeout */
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/* to request and compare any route changes */
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srcentry_t srcentry_save;
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/*
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* Init some timers
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*/
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void
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init_timers()
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{
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unicast_routing_check_interval = UCAST_ROUTING_CHECK_INTERVAL;
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unicast_routing_timer = unicast_routing_check_interval;
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/* Initialize the srcentry used to save the old routes
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* during unicast routing change discovery process.
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*/
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srcentry_save.prev = (srcentry_t *)NULL;
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srcentry_save.next = (srcentry_t *)NULL;
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memset(&srcentry_save.address, 0, sizeof(struct sockaddr_in6));
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srcentry_save.address.sin6_len = sizeof(struct sockaddr_in6);
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srcentry_save.address.sin6_family= AF_INET6;
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srcentry_save.mrtlink = (mrtentry_t *)NULL;
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srcentry_save.incoming = NO_VIF;
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srcentry_save.upstream = (pim_nbr_entry_t *)NULL;
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srcentry_save.metric = ~0;
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srcentry_save.preference = ~0;
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srcentry_save.timer = 0;
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}
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/*
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* On every timer interrupt, advance (i.e. decrease) the timer for each
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* neighbor and group entry for each vif.
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*/
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void
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age_vifs()
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{
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vifi_t vifi;
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register struct uvif *v;
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register pim_nbr_entry_t *next_nbr, *curr_nbr;
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/* XXX: TODO: currently, sending to qe* interface which is DOWN
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* doesn't return error (ENETDOWN) on my Solaris machine,
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* so have to check periodically the
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* interfaces status. If this is fixed, just remove the defs around
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* the "if (vifs_down)" line.
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*/
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#if (!((defined SunOS) && (SunOS >= 50)))
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if (vifs_down)
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#endif /* Solaris */
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check_vif_state();
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/* Age many things */
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for (vifi = 0, v = uvifs; vifi < numvifs; ++vifi, ++v) {
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if (v->uv_flags & (VIFF_DISABLED | VIFF_DOWN))
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continue;
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/* Timeout neighbors */
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for (curr_nbr = v->uv_pim_neighbors; curr_nbr != NULL;
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curr_nbr = next_nbr) {
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next_nbr = curr_nbr->next;
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/*
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* Never timeout neighbors with holdtime = 0xffff.
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* This may be used with ISDN lines to avoid keeping the
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* link up with periodic Hello messages.
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*/
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if (PIM_MESSAGE_HELLO_HOLDTIME_FOREVER == curr_nbr->timer)
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continue;
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IF_NOT_TIMEOUT(curr_nbr->timer)
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continue;
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delete_pim6_nbr(curr_nbr);
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}
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/* PIM_HELLO periodic */
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IF_TIMEOUT(v->uv_pim_hello_timer)
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send_pim6_hello(v, PIM_TIMER_HELLO_HOLDTIME);
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/* MLD query periodic */
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IF_TIMEOUT(v->uv_gq_timer)
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query_groups(v);
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}
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IF_DEBUG(DEBUG_IF) {
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dump_vifs(stderr);
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dump_lcl_grp(stderr);
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}
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}
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/*
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* Scan the whole routing table and timeout a bunch of timers:
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* - prune timers
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* - Join/Prune delay timer
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* - routing entry
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* - Assert timer
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*/
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void
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age_routes()
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{
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mrtentry_t *mrtentry_ptr, *mrtentry_next;
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grpentry_t *grpentry_ptr, *grpentry_next;
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vifi_t vifi;
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int change_flag, state_change;
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int update_src_iif;
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u_long curr_bytecnt;
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/*
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* Timing out of the global `unicast_routing_timer` and data rate timer
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*/
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IF_TIMEOUT(unicast_routing_timer) {
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ucast_flag = TRUE;
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unicast_routing_timer = unicast_routing_check_interval;
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}
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ELSE {
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ucast_flag = FALSE;
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}
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/* Walk the the (S,G) entries */
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if(grplist == (grpentry_t *)NULL)
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return;
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for(grpentry_ptr = grplist;
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grpentry_ptr != (grpentry_t *)NULL;
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grpentry_ptr = grpentry_next) {
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grpentry_next = grpentry_ptr->next;
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for(mrtentry_ptr = grpentry_ptr->mrtlink;
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mrtentry_ptr != (mrtentry_t *)NULL;
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mrtentry_ptr = mrtentry_next) {
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mrtentry_next = mrtentry_ptr->grpnext;
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/* Refresh entry timer if data forwarded */
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curr_bytecnt = mrtentry_ptr->sg_count.bytecnt;
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if (k_get_sg_cnt(udp_socket,
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&mrtentry_ptr->source->address,
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&mrtentry_ptr->group->group,
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&mrtentry_ptr->sg_count)) {
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/* No such routing entry in kernel */
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delete_mrtentry(mrtentry_ptr);
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continue;
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}
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if(!(IF_ISEMPTY(&mrtentry_ptr->oifs)) &&
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curr_bytecnt != mrtentry_ptr->sg_count.bytecnt) {
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/* Packets have been forwarded - refresh timer
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* Note that these counters count packets received,
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* not packets forwarded. So only refresh if packets
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* received and non-null oiflist.
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*/
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IF_DEBUG(DEBUG_MFC)
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log(LOG_DEBUG, 0,
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"Refreshing src %s, dst %s after %d bytes forwarded",
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inet6_fmt(&mrtentry_ptr->source->address.sin6_addr),
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inet6_fmt(&mrtentry_ptr->group->group.sin6_addr),
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mrtentry_ptr->sg_count.bytecnt);
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SET_TIMER(mrtentry_ptr->timer, PIM_DATA_TIMEOUT);
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}
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/* Time out the entry */
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IF_TIMEOUT(mrtentry_ptr->timer) {
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delete_mrtentry(mrtentry_ptr);
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continue;
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}
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/* Time out asserts */
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if(mrtentry_ptr->flags & MRTF_ASSERTED)
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IF_TIMEOUT(mrtentry_ptr->assert_timer) {
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mrtentry_ptr->flags &= ~MRTF_ASSERTED;
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mrtentry_ptr->upstream = mrtentry_ptr->source->upstream;
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mrtentry_ptr->metric = mrtentry_ptr->source->metric;
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mrtentry_ptr->preference = mrtentry_ptr->source->preference;
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}
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/* Time out Pruned interfaces */
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change_flag = FALSE;
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for (vifi = 0; vifi < numvifs; vifi++) {
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if (IF_ISSET(vifi, &mrtentry_ptr->pruned_oifs))
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IF_TIMEOUT(mrtentry_ptr->prune_timers[vifi]) {
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IF_CLR(vifi, &mrtentry_ptr->pruned_oifs);
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SET_TIMER(mrtentry_ptr->prune_timers[vifi], 0);
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change_flag = TRUE;
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}
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}
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/* Unicast Route changes */
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update_src_iif = FALSE;
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if (ucast_flag == TRUE) {
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/* iif toward the source */
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srcentry_save.incoming = mrtentry_ptr->source->incoming;
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srcentry_save.upstream = mrtentry_ptr->source->upstream;
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srcentry_save.preference = mrtentry_ptr->source->preference;
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srcentry_save.metric = mrtentry_ptr->source->metric;
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if (set_incoming(mrtentry_ptr->source,
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PIM_IIF_SOURCE) != TRUE) {
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/*
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* XXX: not in the spec!
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* Cannot find route toward that source.
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* This is bad. Delete the entry.
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*/
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delete_mrtentry(mrtentry_ptr);
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continue;
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}
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else {
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/* iif info found */
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if (!(mrtentry_ptr->flags & MRTF_ASSERTED) &&
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((srcentry_save.incoming !=
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mrtentry_ptr->incoming)
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|| (srcentry_save.upstream !=
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mrtentry_ptr->upstream))) {
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/* Route change has occur */
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update_src_iif = TRUE;
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mrtentry_ptr->incoming =
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mrtentry_ptr->source->incoming;
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mrtentry_ptr->upstream =
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mrtentry_ptr->source->upstream;
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/* mrtentry should have pref/metric of upstream
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* assert winner, but we dont have that info,
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* so use the source pref/metric, which will be
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* larger and thus the correct assert winner
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* from upstream will be chosen.
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*/
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mrtentry_ptr->preference =
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mrtentry_ptr->source->preference;
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mrtentry_ptr->metric =
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mrtentry_ptr->source->metric;
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}
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}
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}
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if ((change_flag == TRUE) || (update_src_iif == TRUE)) {
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/* Flush the changes */
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state_change =
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change_interfaces(mrtentry_ptr,
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mrtentry_ptr->incoming,
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&mrtentry_ptr->pruned_oifs,
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&mrtentry_ptr->leaves,
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&mrtentry_ptr->asserted_oifs);
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if(state_change == -1)
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trigger_prune_alert(mrtentry_ptr);
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}
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}
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}
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IF_DEBUG(DEBUG_PIM_MRT)
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dump_pim_mrt(stderr);
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return;
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}
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