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         XFREE(MTYPE_RIPNG_PEER, peer);
  45 }
  46
  47 struct ripng_peer *ripng_peer_lookup(struct in6_addr *addr)
  48 {
  49         struct ripng_peer *peer;
  50         struct listnode *node, *nnode;
  51
  52         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  53                 if (IPV6_ADDR_SAME(&peer->addr, addr))
  54                         return peer;
  55         }
  56         return NULL;
  57 }
  58
  59 struct ripng_peer *ripng_peer_lookup_next(struct in6_addr *addr)
  60 {
  61         struct ripng_peer *peer;
  62         struct listnode *node, *nnode;
  63
  64         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
  65                 if (addr6_cmp(&peer->addr, addr) > 0)
  66                         return peer;
  67         }
  68         return NULL;
  69 }
  70
  71 /* RIPng peer is timeout.
  72  * Garbage collector.
  73  **/
  74 static int ripng_peer_timeout(struct thread *t)
  75 {
  76         struct ripng_peer *peer;
  77
  78         peer = THREAD_ARG(t);
  79         listnode_delete(ripng->peer_list, peer);
  80         ripng_peer_free(peer);
  81
  82         return 0;
  83 }
  84
  85 /* Get RIPng peer.  At the same time update timeout thread. */
  86 static struct ripng_peer *ripng_peer_get(struct in6_addr *addr)
  87 {
  88         struct ripng_peer *peer;
  89
  90         peer = ripng_peer_lookup(addr);
  91
  92         if (peer) {
  93                 if (peer->t_timeout)
  94                         thread_cancel(peer->t_timeout);
  95         } else {
  96                 peer = ripng_peer_new();
  97                 peer->addr = *addr; /* XXX */
  98                 listnode_add_sort(ripng->peer_list, peer);
  99         }
 100
 101         /* Update timeout thread. */
 102         peer->t_timeout = NULL;
 103         thread_add_timer(master, ripng_peer_timeout, peer,
 104                          RIPNG_PEER_TIMER_DEFAULT, &peer->t_timeout);
 105
 106         /* Last update time set. */
 107         time(&peer->uptime);
 108
 109         return peer;
 110 }
 111
 112 void ripng_peer_update(struct sockaddr_in6 *from, uint8_t version)
 113 {
 114         struct ripng_peer *peer;
 115         peer = ripng_peer_get(&from->sin6_addr);
 116         peer->version = version;
 117 }
 118
 119 void ripng_peer_bad_route(struct sockaddr_in6 *from)
 120 {
 121         struct ripng_peer *peer;
 122         peer = ripng_peer_get(&from->sin6_addr);
 123         peer->recv_badroutes++;
 124 }
 125
 126 void ripng_peer_bad_packet(struct sockaddr_in6 *from)
 127 {
 128         struct ripng_peer *peer;
 129         peer = ripng_peer_get(&from->sin6_addr);
 130         peer->recv_badpackets++;
 131 }
 132
 133 /* Display peer uptime. */
 134 static char *ripng_peer_uptime(struct ripng_peer *peer, char *buf, size_t len)
 135 {
 136         time_t uptime;
 137         struct tm *tm;
 138
 139         /* If there is no connection has been done before print `never'. */
 140         if (peer->uptime == 0) {
 141                 snprintf(buf, len, "never   ");
 142                 return buf;
 143         }
 144
 145         /* Get current time. */
 146         uptime = time(NULL);
 147         uptime -= peer->uptime;
 148         tm = gmtime(&uptime);
 149
 150         if (uptime < ONE_DAY_SECOND)
 151                 snprintf(buf, len, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
 152                          tm->tm_sec);
 153         else if (uptime < ONE_WEEK_SECOND)
 154                 snprintf(buf, len, "%dd%02dh%02dm", tm->tm_yday, tm->tm_hour,
 155                          tm->tm_min);
 156         else
 157                 snprintf(buf, len, "%02dw%dd%02dh", tm->tm_yday / 7,
 158                          tm->tm_yday - ((tm->tm_yday / 7) * 7), tm->tm_hour);
 159         return buf;
 160 }
 161
 162 void ripng_peer_display(struct vty *vty)
 163 {
 164         struct ripng_peer *peer;
 165         struct listnode *node, *nnode;
 166 #define RIPNG_UPTIME_LEN 25
 167         char timebuf[RIPNG_UPTIME_LEN];
 168
 169         for (ALL_LIST_ELEMENTS(ripng->peer_list, node, nnode, peer)) {
 170                 vty_out(vty, "    %s \n%14s %10d %10d %10d      %s\n",
 171                         inet6_ntoa(peer->addr), " ", peer->recv_badpackets,
 172                         peer->recv_badroutes, ZEBRA_RIPNG_DISTANCE_DEFAULT,
 173                         ripng_peer_uptime(peer, timebuf, RIPNG_UPTIME_LEN));
 174         }
 175 }
 176
 177 int ripng_peer_list_cmp(struct ripng_peer *p1, struct ripng_peer *p2)
 178 {
 179         return memcmp(&p1->addr, &p2->addr, sizeof(struct in6_addr));
 180 }