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Diff for /src/sys/netinet6/mld6.c between version 1.9 and 1.29

version 1.9, 2000/01/06 15:46:10 version 1.29, 2006/01/21 00:15:36
Line 1 
Line 1 
 /*      $NetBSD$        */  /*      $NetBSD$        */
   /*      $KAME: mld6.c,v 1.25 2001/01/16 14:14:18 itojun Exp $   */
   
 /*  /*
  * Copyright (C) 1998 WIDE Project.   * Copyright (C) 1998 WIDE Project.
  * All rights reserved.   * All rights reserved.
  *   *
  * Redistribution and use in source and binary forms, with or without   * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions   * modification, are permitted provided that the following conditions
  * are met:   * are met:
Line 15 
Line 16 
  * 3. Neither the name of the project nor the names of its contributors   * 3. Neither the name of the project nor the names of its contributors
  *    may be used to endorse or promote products derived from this software   *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.   *    without specific prior written permission.
  *   *
  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND   * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Line 30 
Line 31 
  */   */
   
 /*  /*
  * Copyright (c) 1988 Stephen Deering.  
  * Copyright (c) 1992, 1993   * Copyright (c) 1992, 1993
  *      The Regents of the University of California.  All rights reserved.   *      The Regents of the University of California.  All rights reserved.
  *   *
Line 45 
Line 45 
  * 2. Redistributions in binary form must reproduce the above copyright   * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the   *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.   *    documentation and/or other materials provided with the distribution.
    * 3. Neither the name of the University nor the names of its contributors
    *    may be used to endorse or promote products derived from this software
    *    without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    * SUCH DAMAGE.
    *
    *      @(#)igmp.c      8.1 (Berkeley) 7/19/93
    */
   
   /*
    * Copyright (c) 1988 Stephen Deering.
    *
    * This code is derived from software contributed to Berkeley by
    * Stephen Deering of Stanford University.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions and the following disclaimer.
    * 2. Redistributions in binary form must reproduce the above copyright
    *    notice, this list of conditions and the following disclaimer in the
    *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software   * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:   *    must display the following acknowledgement:
  *      This product includes software developed by the University of   *      This product includes software developed by the University of
Line 68 
Line 101 
  *      @(#)igmp.c      8.1 (Berkeley) 7/19/93   *      @(#)igmp.c      8.1 (Berkeley) 7/19/93
  */   */
   
   #include <sys/cdefs.h>
   __KERNEL_RCSID(0, "$NetBSD$");
   
 #include "opt_inet.h"  #include "opt_inet.h"
 #include "opt_ipsec.h"  
   
 #include <sys/param.h>  #include <sys/param.h>
 #include <sys/systm.h>  #include <sys/systm.h>
Line 82 
Line 117 
   
 #include <netinet/in.h>  #include <netinet/in.h>
 #include <netinet/in_var.h>  #include <netinet/in_var.h>
 #include <netinet6/ip6.h>  #include <netinet/ip6.h>
 #include <netinet6/ip6_var.h>  #include <netinet6/ip6_var.h>
 #include <netinet6/icmp6.h>  #include <netinet6/scope6_var.h>
   #include <netinet/icmp6.h>
 #include <netinet6/mld6_var.h>  #include <netinet6/mld6_var.h>
   
 #include <net/net_osdep.h>  #include <net/net_osdep.h>
Line 94 
Line 130 
  */   */
   
 /* denotes that the MLD max response delay field specifies time in milliseconds */  /* denotes that the MLD max response delay field specifies time in milliseconds */
 #define MLD6_TIMER_SCALE        1000  #define MLD_TIMER_SCALE 1000
 /*  /*
  * time between repetitions of a node's initial report of interest in a   * time between repetitions of a node's initial report of interest in a
  * multicast address(in seconds)   * multicast address(in seconds)
  */   */
 #define MLD6_UNSOLICITED_REPORT_INTERVAL        10  #define MLD_UNSOLICITED_REPORT_INTERVAL 10
   
 static struct ip6_pktopts ip6_opts;  static struct ip6_pktopts ip6_opts;
 static int mld6_timers_are_running;  static int mld_timers_are_running;
 /* XXX: These are necessary for KAME's link-local hack */  
 static struct in6_addr mld6_all_nodes_linklocal = IN6ADDR_LINKLOCAL_ALLNODES_INIT;  
 static struct in6_addr mld6_all_routers_linklocal = IN6ADDR_LINKLOCAL_ALLROUTERS_INIT;  
   
 static void mld6_sendpkt __P((struct in6_multi *, int, const struct in6_addr *));  static void mld6_sendpkt __P((struct in6_multi *, int, const struct in6_addr *));
   
Line 116  mld6_init()
Line 149  mld6_init()
         struct ip6_hbh *hbh = (struct ip6_hbh *)hbh_buf;          struct ip6_hbh *hbh = (struct ip6_hbh *)hbh_buf;
         u_int16_t rtalert_code = htons((u_int16_t)IP6OPT_RTALERT_MLD);          u_int16_t rtalert_code = htons((u_int16_t)IP6OPT_RTALERT_MLD);
   
         mld6_timers_are_running = 0;          mld_timers_are_running = 0;
   
         /* ip6h_nxt will be fill in later */          /* ip6h_nxt will be fill in later */
         hbh->ip6h_len = 0;      /* (8 >> 3) - 1*/          hbh->ip6h_len = 0;      /* (8 >> 3) - 1 */
   
         /* XXX: grotty hard coding... */          /* XXX: grotty hard coding... */
         hbh_buf[2] = IP6OPT_PADN;       /* 2 byte padding */          hbh_buf[2] = IP6OPT_PADN;       /* 2 byte padding */
Line 137  void
Line 170  void
 mld6_start_listening(in6m)  mld6_start_listening(in6m)
         struct in6_multi *in6m;          struct in6_multi *in6m;
 {  {
         int s = splsoftnet();          struct in6_addr all_in6;
   
         /*          /*
          * (draft-ietf-ipngwg-mld, page 10)           * RFC2710 page 10:
          * The node never sends a Report or Done for the link-scope all-nodes           * The node never sends a Report or Done for the link-scope all-nodes
          * address.           * address.
          * MLD messages are never sent for multicast addresses whose scope is 0           * MLD messages are never sent for multicast addresses whose scope is 0
          * (reserved) or 1 (node-local).           * (reserved) or 1 (node-local).
          */           */
         mld6_all_nodes_linklocal.s6_addr16[1] =          all_in6 = in6addr_linklocal_allnodes;
                 htons(in6m->in6m_ifp->if_index); /* XXX */          if (in6_setscope(&all_in6, in6m->in6m_ifp, NULL)) {
         if (IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr, &mld6_all_nodes_linklocal) ||                  /* XXX: this should not happen! */
                   in6m->in6m_timer = 0;
                   in6m->in6m_state = MLD_OTHERLISTENER;
           }
           if (IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr, &all_in6) ||
             IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) {              IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) < IPV6_ADDR_SCOPE_LINKLOCAL) {
                 in6m->in6m_timer = 0;                  in6m->in6m_timer = 0;
                 in6m->in6m_state = MLD6_OTHERLISTENER;                  in6m->in6m_state = MLD_OTHERLISTENER;
         } else {          } else {
                 mld6_sendpkt(in6m, MLD6_LISTENER_REPORT, NULL);                  mld6_sendpkt(in6m, MLD_LISTENER_REPORT, NULL);
                 in6m->in6m_timer = MLD6_RANDOM_DELAY(                  in6m->in6m_timer =
                         MLD6_UNSOLICITED_REPORT_INTERVAL * PR_FASTHZ);                      MLD_RANDOM_DELAY(MLD_UNSOLICITED_REPORT_INTERVAL *
                 in6m->in6m_state = MLD6_IREPORTEDLAST;                      PR_FASTHZ);
                 mld6_timers_are_running = 1;                  in6m->in6m_state = MLD_IREPORTEDLAST;
                   mld_timers_are_running = 1;
         }          }
         splx(s);  
 }  }
   
 void  void
 mld6_stop_listening(in6m)  mld6_stop_listening(in6m)
         struct in6_multi *in6m;          struct in6_multi *in6m;
 {  {
         mld6_all_nodes_linklocal.s6_addr16[1] =          struct in6_addr allnode, allrouter;
                 htons(in6m->in6m_ifp->if_index); /* XXX */  
         mld6_all_routers_linklocal.s6_addr16[1] =          allnode = in6addr_linklocal_allnodes;
                 htons(in6m->in6m_ifp->if_index); /* XXX: necessary when mrouting */          if (in6_setscope(&allnode, in6m->in6m_ifp, NULL)) {
                   /* XXX: this should not happen! */
         if (in6m->in6m_state == MLD6_IREPORTEDLAST &&                  return;
             (!IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr, &mld6_all_nodes_linklocal)) &&          }
             IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) > IPV6_ADDR_SCOPE_NODELOCAL)          allrouter = in6addr_linklocal_allrouters;
                 mld6_sendpkt(in6m, MLD6_LISTENER_DONE,          if (in6_setscope(&allrouter, in6m->in6m_ifp, NULL)) {
                              &mld6_all_routers_linklocal);                  /* XXX impossible */
                   return;
           }
   
           if (in6m->in6m_state == MLD_IREPORTEDLAST &&
               (!IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr, &allnode)) &&
               IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) >
               IPV6_ADDR_SCOPE_INTFACELOCAL) {
                   mld6_sendpkt(in6m, MLD_LISTENER_DONE, &allrouter);
           }
 }  }
   
 void  void
Line 184  mld6_input(m, off)
Line 230  mld6_input(m, off)
         int off;          int off;
 {  {
         struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);          struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
         struct mld6_hdr *mldh = (struct mld6_hdr *)(mtod(m, caddr_t) + off);          struct mld_hdr *mldh;
         struct ifnet *ifp = m->m_pkthdr.rcvif;          struct ifnet *ifp = m->m_pkthdr.rcvif;
         struct in6_multi *in6m;          struct in6_multi *in6m;
           struct in6_addr mld_addr, all_in6;
         struct in6_ifaddr *ia;          struct in6_ifaddr *ia;
         int timer;              /* timer value in the MLD query header */          int timer;              /* timer value in the MLD query header */
   
           IP6_EXTHDR_GET(mldh, struct mld_hdr *, m, off, sizeof(*mldh));
           if (mldh == NULL) {
                   icmp6stat.icp6s_tooshort++;
                   return;
           }
   
         /* source address validation */          /* source address validation */
           ip6 = mtod(m, struct ip6_hdr *);/* in case mpullup */
         if (!IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src)) {          if (!IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_src)) {
   #if 0
                 log(LOG_ERR,                  log(LOG_ERR,
                     "mld6_input: src %s is not link-local\n",                      "mld_input: src %s is not link-local (grp=%s)\n",
                     ip6_sprintf(&ip6->ip6_src));                      ip6_sprintf(&ip6->ip6_src),
                       ip6_sprintf(&mldh->mld_addr));
   #endif
                 /*                  /*
                  * spec(draft-ietf-ipngwg-mld) does not explicitly                   * spec (RFC2710) does not explicitly
                  * specify to discard the packet from a non link-local                   * specify to discard the packet from a non link-local
                  * source address. But we believe it's expected to do so.                   * source address. But we believe it's expected to do so.
                    * XXX: do we have to allow :: as source?
                  */                   */
                   m_freem(m);
                   return;
           }
   
           /*
            * make a copy for local work (in6_setscope() may modify the 1st arg)
            */
           mld_addr = mldh->mld_addr;
           if (in6_setscope(&mld_addr, ifp, NULL)) {
                   /* XXX: this should not happen! */
                   m_free(m);
                 return;                  return;
         }          }
   
Line 210  mld6_input(m, off)
Line 279  mld6_input(m, off)
          * In Delaying Listener state, our timer is running (in6m->in6m_timer)           * In Delaying Listener state, our timer is running (in6m->in6m_timer)
          * In Idle Listener state, our timer is not running (in6m->in6m_timer==0)           * In Idle Listener state, our timer is not running (in6m->in6m_timer==0)
          *           *
          * The flag is in6m->in6m_state, it is set to MLD6_OTHERLISTENER if           * The flag is in6m->in6m_state, it is set to MLD_OTHERLISTENER if
          * we have heard a report from another member, or MLD6_IREPORTEDLAST           * we have heard a report from another member, or MLD_IREPORTEDLAST
          * if we sent the last report.           * if we sent the last report.
          */           */
         switch(mldh->mld6_type) {          switch (mldh->mld_type) {
         case MLD6_LISTENER_QUERY:          case MLD_LISTENER_QUERY:
                 if (ifp->if_flags & IFF_LOOPBACK)                  if (ifp->if_flags & IFF_LOOPBACK)
                         break;                          break;
   
                 if (!IN6_IS_ADDR_UNSPECIFIED(&mldh->mld6_addr) &&                  if (!IN6_IS_ADDR_UNSPECIFIED(&mld_addr) &&
                 !IN6_IS_ADDR_MULTICAST(&mldh->mld6_addr))                      !IN6_IS_ADDR_MULTICAST(&mld_addr))
                         break;  /* print error or log stat? */                          break;  /* print error or log stat? */
                 if (IN6_IS_ADDR_MC_LINKLOCAL(&mldh->mld6_addr))  
                         mldh->mld6_addr.s6_addr16[1] =                  all_in6 = in6addr_linklocal_allnodes;
                                 htons(ifp->if_index); /* XXX */                  if (in6_setscope(&all_in6, ifp, NULL)) {
                           /* XXX: this should not happen! */
                           break;
                   }
   
                 /*                  /*
                 * - Start the timers in all of our membership records                   * - Start the timers in all of our membership records
                 *   that the query applies to for the interface on                   *   that the query applies to for the interface on
                 *   which the query arrived excl. those that belong                   *   which the query arrived excl. those that belong
                 *   to the "all-nodes" group (ff02::1).                   *   to the "all-nodes" group (ff02::1).
                 * - Restart any timer that is already running but has                   * - Restart any timer that is already running but has
                 *   A value longer than the requested timeout.                   *   A value longer than the requested timeout.
                 * - Use the value specified in the query message as                   * - Use the value specified in the query message as
                 *   the maximum timeout.                   *   the maximum timeout.
                 */                   */
                 IFP_TO_IA6(ifp, ia);                  IFP_TO_IA6(ifp, ia);
                 if (ia == NULL)                  if (ia == NULL)
                         break;                          break;
   
                 /*                  /*
                 * XXX: System timer resolution is too low to handle Max                   * XXX: System timer resolution is too low to handle Max
                 * Response Delay, so set 1 to the internal timer even if                   * Response Delay, so set 1 to the internal timer even if
                 * the calculated value equals to zero when Max Response                   * the calculated value equals to zero when Max Response
                 * Delay is positive.                   * Delay is positive.
                 */                   */
                 timer = ntohs(mldh->mld6_maxdelay)*PR_FASTHZ/MLD6_TIMER_SCALE;                  timer = ntohs(mldh->mld_maxdelay)*PR_FASTHZ/MLD_TIMER_SCALE;
                 if (timer == 0 && mldh->mld6_maxdelay)                  if (timer == 0 && mldh->mld_maxdelay)
                         timer = 1;                          timer = 1;
                 mld6_all_nodes_linklocal.s6_addr16[1] =  
                         htons(ifp->if_index); /* XXX */  
   
                 for (in6m = ia->ia6_multiaddrs.lh_first;                  for (in6m = ia->ia6_multiaddrs.lh_first;
                      in6m;                       in6m;
                      in6m = in6m->in6m_entry.le_next)                       in6m = in6m->in6m_entry.le_next)
                 {                  {
                         if (IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr,                          if (IN6_ARE_ADDR_EQUAL(&in6m->in6m_addr, &all_in6) ||
                                                 &mld6_all_nodes_linklocal) ||  
                             IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) <                              IPV6_ADDR_MC_SCOPE(&in6m->in6m_addr) <
                             IPV6_ADDR_SCOPE_LINKLOCAL)                              IPV6_ADDR_SCOPE_LINKLOCAL)
                                 continue;                                  continue;
   
                         if (IN6_IS_ADDR_UNSPECIFIED(&mldh->mld6_addr) ||                          if (IN6_IS_ADDR_UNSPECIFIED(&mld_addr) ||
                             IN6_ARE_ADDR_EQUAL(&mldh->mld6_addr,                              IN6_ARE_ADDR_EQUAL(&mld_addr, &in6m->in6m_addr)) {
                                                 &in6m->in6m_addr))  
                         {  
                                 if (timer == 0) {                                  if (timer == 0) {
                                         /* send a report immediately */                                          /* send a report immediately */
                                         mld6_sendpkt(in6m, MLD6_LISTENER_REPORT,                                          mld6_sendpkt(in6m, MLD_LISTENER_REPORT,
                                                 NULL);                                              NULL);
                                         in6m->in6m_timer = 0; /* reset timer */                                          in6m->in6m_timer = 0; /* reset timer */
                                         in6m->in6m_state = MLD6_IREPORTEDLAST;                                          in6m->in6m_state = MLD_IREPORTEDLAST;
                                 }                                  }
                                 else if (in6m->in6m_timer == 0 || /*idle state*/                                  else if (in6m->in6m_timer == 0 || /*idle state*/
                                         in6m->in6m_timer > timer) {                                      in6m->in6m_timer > timer) {
                                         in6m->in6m_timer =                                          in6m->in6m_timer =
                                                 MLD6_RANDOM_DELAY(timer);                                              MLD_RANDOM_DELAY(timer);
                                         mld6_timers_are_running = 1;                                          mld_timers_are_running = 1;
                                 }                                  }
                         }                          }
                 }                  }
   
                 if (IN6_IS_ADDR_MC_LINKLOCAL(&mldh->mld6_addr))  
                         mldh->mld6_addr.s6_addr16[1] = 0; /* XXX */  
                 break;                  break;
         case MLD6_LISTENER_REPORT:  
           case MLD_LISTENER_REPORT:
                 /*                  /*
                 * For fast leave to work, we have to know that we are the                   * For fast leave to work, we have to know that we are the
                 * last person to send a report for this group.  Reports                   * last person to send a report for this group.  Reports
                 * can potentially get looped back if we are a multicast                   * can potentially get looped back if we are a multicast
                 * router, so discard reports sourced by me.                   * router, so discard reports sourced by me.
                 * Note that it is impossible to check IFF_LOOPBACK flag of                   * Note that it is impossible to check IFF_LOOPBACK flag of
                 * ifp for this purpose, since ip6_mloopback pass the physical                   * ifp for this purpose, since ip6_mloopback pass the physical
                 * interface to looutput.                   * interface to looutput.
                 */                   */
                 if (m->m_flags & M_LOOP) /* XXX: grotty flag, but efficient */                  if (m->m_flags & M_LOOP) /* XXX: grotty flag, but efficient */
                         break;                          break;
   
                 if (!IN6_IS_ADDR_MULTICAST(&mldh->mld6_addr))                  if (!IN6_IS_ADDR_MULTICAST(&mldh->mld_addr))
                         break;                          break;
   
                 if (IN6_IS_ADDR_MC_LINKLOCAL(&mldh->mld6_addr))  
                         mldh->mld6_addr.s6_addr16[1] =  
                                 htons(ifp->if_index); /* XXX */  
                 /*                  /*
                 * If we belong to the group being reported, stop                   * If we belong to the group being reported, stop
                 * our timer for that group.                   * our timer for that group.
                 */                   */
                 IN6_LOOKUP_MULTI(mldh->mld6_addr, ifp, in6m);                  IN6_LOOKUP_MULTI(mld_addr, ifp, in6m);
                 if (in6m) {                  if (in6m) {
                         in6m->in6m_timer = 0; /* transit to idle state */                          in6m->in6m_timer = 0; /* transit to idle state */
                         in6m->in6m_state = MLD6_OTHERLISTENER; /* clear flag */                          in6m->in6m_state = MLD_OTHERLISTENER; /* clear flag */
                 }                  }
   
                 if (IN6_IS_ADDR_MC_LINKLOCAL(&mldh->mld6_addr))  
                         mldh->mld6_addr.s6_addr16[1] = 0; /* XXX */  
                 break;                  break;
         default:                /* this is impossible */          default:                /* this is impossible */
                 log(LOG_ERR, "mld6_input: illegal type(%d)", mldh->mld6_type);  #if 0
                   /*
                    * this case should be impossible because of filtering in
                    * icmp6_input().  But we explicitly disabled this part
                    * just in case.
                    */
                   log(LOG_ERR, "mld_input: illegal type(%d)", mldh->mld6_type);
   #endif
                 break;                  break;
         }          }
   
           m_freem(m);
 }  }
   
 void  void
 mld6_fasttimeo()  mld6_fasttimeo()
 {  {
         register struct in6_multi *in6m;          struct in6_multi *in6m;
         struct in6_multistep step;          struct in6_multistep step;
         int s;          int s;
   
         /*          /*
          * Quick check to see if any work needs to be done, in order           * Quick check to see if any work needs to be done, in order
          * to minimize the overhead of fasttimo processing.           * to minimize the overhead of fasttimo processing.
          */           */
         if (!mld6_timers_are_running)          if (!mld_timers_are_running)
                 return;                  return;
   
         s = splsoftnet();          s = splsoftnet();
         mld6_timers_are_running = 0;          mld_timers_are_running = 0;
         IN6_FIRST_MULTI(step, in6m);          IN6_FIRST_MULTI(step, in6m);
         while (in6m != NULL) {          while (in6m != NULL) {
                 if (in6m->in6m_timer == 0) {                  if (in6m->in6m_timer == 0) {
                         /* do nothing */                          /* do nothing */
                 } else if (--in6m->in6m_timer == 0) {                  } else if (--in6m->in6m_timer == 0) {
                         mld6_sendpkt(in6m, MLD6_LISTENER_REPORT, NULL);                          mld6_sendpkt(in6m, MLD_LISTENER_REPORT, NULL);
                         in6m->in6m_state = MLD6_IREPORTEDLAST;                          in6m->in6m_state = MLD_IREPORTEDLAST;
                 } else {                  } else {
                         mld6_timers_are_running = 1;                          mld_timers_are_running = 1;
                 }                  }
                 IN6_NEXT_MULTI(step, in6m);                  IN6_NEXT_MULTI(step, in6m);
         }          }
Line 361  mld6_sendpkt(in6m, type, dst)
Line 428  mld6_sendpkt(in6m, type, dst)
         const struct in6_addr *dst;          const struct in6_addr *dst;
 {  {
         struct mbuf *mh, *md;          struct mbuf *mh, *md;
         struct mld6_hdr *mldh;          struct mld_hdr *mldh;
         struct ip6_hdr *ip6;          struct ip6_hdr *ip6;
         struct ip6_moptions im6o;          struct ip6_moptions im6o;
         struct in6_ifaddr *ia;          struct in6_ifaddr *ia;
         struct ifnet *ifp = in6m->in6m_ifp;          struct ifnet *ifp = in6m->in6m_ifp;
         struct ifnet *outif = NULL;          int ignflags;
   
         /*          /*
          * At first, find a link local address on the outgoing interface           * At first, find a link local address on the outgoing interface
          * to use as the source address of the MLD packet.           * to use as the source address of the MLD packet.
            * We do not reject tentative addresses for MLD report to deal with
            * the case where we first join a link-local address.
          */           */
         if ((ia = in6ifa_ifpforlinklocal(ifp)) == NULL)          ignflags = (IN6_IFF_NOTREADY|IN6_IFF_ANYCAST) & ~IN6_IFF_TENTATIVE;
           if ((ia = in6ifa_ifpforlinklocal(ifp, ignflags)) == NULL)
                 return;                  return;
           if ((ia->ia6_flags & IN6_IFF_TENTATIVE))
                   ia = NULL;
   
         /*          /*
          * Allocate mbufs to store ip6 header and MLD header.           * Allocate mbufs to store ip6 header and MLD header.
Line 390  mld6_sendpkt(in6m, type, dst)
Line 462  mld6_sendpkt(in6m, type, dst)
         }          }
         mh->m_next = md;          mh->m_next = md;
   
 #ifdef IPSEC  
         mh->m_pkthdr.rcvif = NULL;          mh->m_pkthdr.rcvif = NULL;
 #endif          mh->m_pkthdr.len = sizeof(struct ip6_hdr) + sizeof(struct mld_hdr);
         mh->m_pkthdr.len = sizeof(struct ip6_hdr) + sizeof(struct mld6_hdr);  
         mh->m_len = sizeof(struct ip6_hdr);          mh->m_len = sizeof(struct ip6_hdr);
         MH_ALIGN(mh, sizeof(struct ip6_hdr));          MH_ALIGN(mh, sizeof(struct ip6_hdr));
   
Line 405  mld6_sendpkt(in6m, type, dst)
Line 475  mld6_sendpkt(in6m, type, dst)
         /* ip6_plen will be set later */          /* ip6_plen will be set later */
         ip6->ip6_nxt = IPPROTO_ICMPV6;          ip6->ip6_nxt = IPPROTO_ICMPV6;
         /* ip6_hlim will be set by im6o.im6o_multicast_hlim */          /* ip6_hlim will be set by im6o.im6o_multicast_hlim */
         ip6->ip6_src = ia->ia_addr.sin6_addr;          ip6->ip6_src = ia ? ia->ia_addr.sin6_addr : in6addr_any;
         ip6->ip6_dst = dst ? *dst : in6m->in6m_addr;          ip6->ip6_dst = dst ? *dst : in6m->in6m_addr;
   
         /* fill in the MLD header */          /* fill in the MLD header */
         md->m_len = sizeof(struct mld6_hdr);          md->m_len = sizeof(struct mld_hdr);
         mldh = mtod(md, struct mld6_hdr *);          mldh = mtod(md, struct mld_hdr *);
         mldh->mld6_type = type;          mldh->mld_type = type;
         mldh->mld6_code = 0;          mldh->mld_code = 0;
         mldh->mld6_cksum = 0;          mldh->mld_cksum = 0;
         /* XXX: we assume the function will not be called for query messages */          /* XXX: we assume the function will not be called for query messages */
         mldh->mld6_maxdelay = 0;          mldh->mld_maxdelay = 0;
         mldh->mld6_reserved = 0;          mldh->mld_reserved = 0;
         mldh->mld6_addr = in6m->in6m_addr;          mldh->mld_addr = in6m->in6m_addr;
         if (IN6_IS_ADDR_MC_LINKLOCAL(&mldh->mld6_addr))          in6_clearscope(&mldh->mld_addr); /* XXX */
                 mldh->mld6_addr.s6_addr16[1] = 0; /* XXX */          mldh->mld_cksum = in6_cksum(mh, IPPROTO_ICMPV6, sizeof(struct ip6_hdr),
         mldh->mld6_cksum = in6_cksum(mh, IPPROTO_ICMPV6, sizeof(struct ip6_hdr),              sizeof(struct mld_hdr));
                                      sizeof(struct mld6_hdr));  
   
         /* construct multicast option */          /* construct multicast option */
         bzero(&im6o, sizeof(im6o));          bzero(&im6o, sizeof(im6o));
Line 436  mld6_sendpkt(in6m, type, dst)
Line 505  mld6_sendpkt(in6m, type, dst)
   
         /* increment output statictics */          /* increment output statictics */
         icmp6stat.icp6s_outhist[type]++;          icmp6stat.icp6s_outhist[type]++;
           icmp6_ifstat_inc(ifp, ifs6_out_msg);
         ip6_output(mh, &ip6_opts, NULL, 0, &im6o, &outif);          switch (type) {
         if (outif) {          case MLD_LISTENER_QUERY:
                 icmp6_ifstat_inc(outif, ifs6_out_msg);                  icmp6_ifstat_inc(ifp, ifs6_out_mldquery);
                 switch(type) {                  break;
                  case MLD6_LISTENER_QUERY:          case MLD_LISTENER_REPORT:
                          icmp6_ifstat_inc(outif, ifs6_out_mldquery);                  icmp6_ifstat_inc(ifp, ifs6_out_mldreport);
                          break;                  break;
                  case MLD6_LISTENER_REPORT:          case MLD_LISTENER_DONE:
                          icmp6_ifstat_inc(outif, ifs6_out_mldreport);                  icmp6_ifstat_inc(ifp, ifs6_out_mlddone);
                          break;                  break;
                  case MLD6_LISTENER_DONE:  
                          icmp6_ifstat_inc(outif, ifs6_out_mlddone);  
                          break;  
                 }  
         }          }
   
           ip6_output(mh, &ip6_opts, NULL, ia ? 0 : IPV6_UNSPECSRC,
               &im6o, (struct socket *)NULL, NULL);
 }  }
Legend:
Removed from v.1.9  
changed lines
  Added in v.1.29
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