ripngd/ripng_peer.c

   1 /* RIPng peer support
   2  * Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /* RIPng support added by Vincent Jardin <vincent.jardin@6wind.com>
  22  * Copyright (C) 2002 6WIND
  23  */
  24
  25 #include <zebra.h>
  26
  27 #include "if.h"
  28 #include "prefix.h"
  29 #include "command.h"
  30 #include "linklist.h"
  31 #include "thread.h"
  32 #include "memory.h"
  33
  34 #include "ripngd/ripngd.h"
  35 #include "ripngd/ripng_nexthop.h"
  36
  37 DEFINE_MTYPE_STATIC(RIPNGD, RIPNG_PEER, "RIPng peer");
  38
  39 static struct ripng_peer *ripng_peer_new(void)
  40 {
  41         return XCALLOC(MTYPE_RIPNG_PEER, sizeof(struct ripng_peer));
  42 }
  43
  44 static void ripng_peer_free(struct ripng_peer *peer)
  45 {
  46         THREAD_OFF(peer->t_timeout);
  47         XFREE(MTYPE_RIPNG_PEER, peer);
  48 }
  49
  50 struct ripng_peer *ripng_peer_lookup(struct ripng *ripng, struct in6_addr *addr)
  51 {
  52         struct ripng_peer *peer;
  53         struct listnode *node, *nnode;
  54
  55         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  56                 if (IPV6_ADDR_SAME(&peer->addr, addr))
  57                         return peer;
  58         }
  59         return NULL;
  60 }
  61
  62 struct ripng_peer *ripng_peer_lookup_next(struct ripng *ripng,
  63                                           struct in6_addr *addr)
  64 {
  65         struct ripng_peer *peer;
  66         struct listnode *node, *nnode;
  67
  68         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  69                 if (addr6_cmp(&peer->addr, addr) > 0)
  70                         return peer;
  71         }
  72         return NULL;
  73 }
  74
  75 /* RIPng peer is timeout.
  76  * Garbage collector.
  77  **/
  78 static void ripng_peer_timeout(struct thread *t)
  79 {
  80         struct ripng_peer *peer;
  81
  82         peer = THREAD_ARG(t);
  83         listnode_delete(peer->ripng->peer_list, peer);
  84         ripng_peer_free(peer);
  85 }
  86
  87 /* Get RIPng peer.  At the same time update timeout thread. */
  88 static struct ripng_peer *ripng_peer_get(struct ripng *ripng,
  89                                          struct in6_addr *addr)
  90 {
  91         struct ripng_peer *peer;
  92
  93         peer = ripng_peer_lookup(ripng, addr);
  94
  95         if (peer) {
  96                 THREAD_OFF(peer->t_timeout);
  97         } else {
  98                 peer = ripng_peer_new();
  99                 peer->ripng = ripng;
 100                 peer->addr = *addr;
 101                 listnode_add_sort(ripng->peer_list, peer);
 102         }
 103
 104         /* Update timeout thread. */
 105         thread_add_timer(master, ripng_peer_timeout, peer,
 106                          RIPNG_PEER_TIMER_DEFAULT, &peer->t_timeout);
 107
 108         /* Last update time set. */
 109         time(&peer->uptime);
 110
 111         return peer;
 112 }
 113
 114 void ripng_peer_update(struct ripng *ripng, struct sockaddr_in6 *from,
 115                        uint8_t version)
 116 {
 117         struct ripng_peer *peer;
 118         peer = ripng_peer_get(ripng, &from->sin6_addr);
 119         peer->version = version;
 120 }
 121
 122 void ripng_peer_bad_route(struct ripng *ripng, struct sockaddr_in6 *from)
 123 {
 124         struct ripng_peer *peer;
 125         peer = ripng_peer_get(ripng, &from->sin6_addr);
 126         peer->recv_badroutes++;
 127 }
 128
 129 void ripng_peer_bad_packet(struct ripng *ripng, struct sockaddr_in6 *from)
 130 {
 131         struct ripng_peer *peer;
 132         peer = ripng_peer_get(ripng, &from->sin6_addr);
 133         peer->recv_badpackets++;
 134 }
 135
 136 /* Display peer uptime. */
 137 static char *ripng_peer_uptime(struct ripng_peer *peer, char *buf, size_t len)
 138 {
 139         time_t uptime;
 140
 141         /* If there is no connection has been done before print `never'. */
 142         if (peer->uptime == 0) {
 143                 snprintf(buf, len, "never   ");
 144                 return buf;
 145         }
 146
 147         /* Get current time. */
 148         uptime = time(NULL);
 149         uptime -= peer->uptime;
 150
 151         frrtime_to_interval(uptime, buf, len);
 152
 153         return buf;
 154 }
 155
 156 void ripng_peer_display(struct vty *vty, struct ripng *ripng)
 157 {
 158         struct ripng_peer *peer;
 159         struct listnode *node, *nnode;
 160 #define RIPNG_UPTIME_LEN 25
 161         char timebuf[RIPNG_UPTIME_LEN];
 162
 163         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
 164                 vty_out(vty, "    %pI6 \n%14s %10d %10d %10d      %s\n",
 165                         &peer->addr, " ", peer->recv_badpackets,
 166                         peer->recv_badroutes, ZEBRA_RIPNG_DISTANCE_DEFAULT,
 167                         ripng_peer_uptime(peer, timebuf, RIPNG_UPTIME_LEN));
 168         }
 169 }
 170
 171 int ripng_peer_list_cmp(struct ripng_peer *p1, struct ripng_peer *p2)
 172 {
 173         return memcmp(&p1->addr, &p2->addr, sizeof(struct in6_addr));
 174 }
 175
 176 void ripng_peer_list_del(void *arg)
 177 {
 178         ripng_peer_free(arg);
 179 }