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 static struct ripng_peer *ripng_peer_new(void)
  38 {
  39         return XCALLOC(MTYPE_RIPNG_PEER, sizeof(struct ripng_peer));
  40 }
  41
  42 static void ripng_peer_free(struct ripng_peer *peer)
  43 {
  44         RIPNG_TIMER_OFF(peer->t_timeout);
  45         XFREE(MTYPE_RIPNG_PEER, peer);
  46 }
  47
  48 struct ripng_peer *ripng_peer_lookup(struct ripng *ripng, struct in6_addr *addr)
  49 {
  50         struct ripng_peer *peer;
  51         struct listnode *node, *nnode;
  52
  53         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  54                 if (IPV6_ADDR_SAME(&peer->addr, addr))
  55                         return peer;
  56         }
  57         return NULL;
  58 }
  59
  60 struct ripng_peer *ripng_peer_lookup_next(struct ripng *ripng,
  61                                           struct in6_addr *addr)
  62 {
  63         struct ripng_peer *peer;
  64         struct listnode *node, *nnode;
  65
  66         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  67                 if (addr6_cmp(&peer->addr, addr) > 0)
  68                         return peer;
  69         }
  70         return NULL;
  71 }
  72
  73 /* RIPng peer is timeout.
  74  * Garbage collector.
  75  **/
  76 static int ripng_peer_timeout(struct thread *t)
  77 {
  78         struct ripng_peer *peer;
  79
  80         peer = THREAD_ARG(t);
  81         listnode_delete(peer->ripng->peer_list, peer);
  82         ripng_peer_free(peer);
  83
  84         return 0;
  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                 if (peer->t_timeout)
  97                         thread_cancel(peer->t_timeout);
  98         } else {
  99                 peer = ripng_peer_new();
 100                 peer->ripng = ripng;
 101                 peer->addr = *addr;
 102                 listnode_add_sort(ripng->peer_list, peer);
 103         }
 104
 105         /* Update timeout thread. */
 106         peer->t_timeout = NULL;
 107         thread_add_timer(master, ripng_peer_timeout, peer,
 108                          RIPNG_PEER_TIMER_DEFAULT, &peer->t_timeout);
 109
 110         /* Last update time set. */
 111         time(&peer->uptime);
 112
 113         return peer;
 114 }
 115
 116 void ripng_peer_update(struct ripng *ripng, struct sockaddr_in6 *from,
 117                        uint8_t version)
 118 {
 119         struct ripng_peer *peer;
 120         peer = ripng_peer_get(ripng, &from->sin6_addr);
 121         peer->version = version;
 122 }
 123
 124 void ripng_peer_bad_route(struct ripng *ripng, struct sockaddr_in6 *from)
 125 {
 126         struct ripng_peer *peer;
 127         peer = ripng_peer_get(ripng, &from->sin6_addr);
 128         peer->recv_badroutes++;
 129 }
 130
 131 void ripng_peer_bad_packet(struct ripng *ripng, struct sockaddr_in6 *from)
 132 {
 133         struct ripng_peer *peer;
 134         peer = ripng_peer_get(ripng, &from->sin6_addr);
 135         peer->recv_badpackets++;
 136 }
 137
 138 /* Display peer uptime. */
 139 static char *ripng_peer_uptime(struct ripng_peer *peer, char *buf, size_t len)
 140 {
 141         time_t uptime;
 142         struct tm *tm;
 143
 144         /* If there is no connection has been done before print `never'. */
 145         if (peer->uptime == 0) {
 146                 snprintf(buf, len, "never   ");
 147                 return buf;
 148         }
 149
 150         /* Get current time. */
 151         uptime = time(NULL);
 152         uptime -= peer->uptime;
 153         tm = gmtime(&uptime);
 154
 155         if (uptime < ONE_DAY_SECOND)
 156                 snprintf(buf, len, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
 157                          tm->tm_sec);
 158         else if (uptime < ONE_WEEK_SECOND)
 159                 snprintf(buf, len, "%dd%02dh%02dm", tm->tm_yday, tm->tm_hour,
 160                          tm->tm_min);
 161         else
 162                 snprintf(buf, len, "%02dw%dd%02dh", tm->tm_yday / 7,
 163                          tm->tm_yday - ((tm->tm_yday / 7) * 7), tm->tm_hour);
 164         return buf;
 165 }
 166
 167 void ripng_peer_display(struct vty *vty, struct ripng *ripng)
 168 {
 169         struct ripng_peer *peer;
 170         struct listnode *node, *nnode;
 171 #define RIPNG_UPTIME_LEN 25
 172         char timebuf[RIPNG_UPTIME_LEN];
 173
 174         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
 175                 vty_out(vty, "    %s \n%14s %10d %10d %10d      %s\n",
 176                         inet6_ntoa(peer->addr), " ", peer->recv_badpackets,
 177                         peer->recv_badroutes, ZEBRA_RIPNG_DISTANCE_DEFAULT,
 178                         ripng_peer_uptime(peer, timebuf, RIPNG_UPTIME_LEN));
 179         }
 180 }
 181
 182 int ripng_peer_list_cmp(struct ripng_peer *p1, struct ripng_peer *p2)
 183 {
 184         return memcmp(&p1->addr, &p2->addr, sizeof(struct in6_addr));
 185 }
 186
 187 void ripng_peer_list_del(void *arg)
 188 {
 189         ripng_peer_free(arg);
 190 }