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
  38 /* Linked list of RIPng peer. */
  39 struct list *peer_list;
  40
  41 static struct ripng_peer *ripng_peer_new(void)
  42 {
  43         return XCALLOC(MTYPE_RIPNG_PEER, sizeof(struct ripng_peer));
  44 }
  45
  46 static void ripng_peer_free(struct ripng_peer *peer)
  47 {
  48         XFREE(MTYPE_RIPNG_PEER, peer);
  49 }
  50
  51 struct ripng_peer *ripng_peer_lookup(struct in6_addr *addr)
  52 {
  53         struct ripng_peer *peer;
  54         struct listnode *node, *nnode;
  55
  56         for (ALL_LIST_ELEMENTS(peer_list, node, nnode, peer)) {
  57                 if (IPV6_ADDR_SAME(&peer->addr, addr))
  58                         return peer;
  59         }
  60         return NULL;
  61 }
  62
  63 struct ripng_peer *ripng_peer_lookup_next(struct in6_addr *addr)
  64 {
  65         struct ripng_peer *peer;
  66         struct listnode *node, *nnode;
  67
  68         for (ALL_LIST_ELEMENTS(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 int ripng_peer_timeout(struct thread *t)
  79 {
  80         struct ripng_peer *peer;
  81
  82         peer = THREAD_ARG(t);
  83         listnode_delete(peer_list, peer);
  84         ripng_peer_free(peer);
  85
  86         return 0;
  87 }
  88
  89 /* Get RIPng peer.  At the same time update timeout thread. */
  90 static struct ripng_peer *ripng_peer_get(struct in6_addr *addr)
  91 {
  92         struct ripng_peer *peer;
  93
  94         peer = ripng_peer_lookup(addr);
  95
  96         if (peer) {
  97                 if (peer->t_timeout)
  98                         thread_cancel(peer->t_timeout);
  99         } else {
 100                 peer = ripng_peer_new();
 101                 peer->addr = *addr; /* XXX */
 102                 listnode_add_sort(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 sockaddr_in6 *from, uint8_t version)
 117 {
 118         struct ripng_peer *peer;
 119         peer = ripng_peer_get(&from->sin6_addr);
 120         peer->version = version;
 121 }
 122
 123 void ripng_peer_bad_route(struct sockaddr_in6 *from)
 124 {
 125         struct ripng_peer *peer;
 126         peer = ripng_peer_get(&from->sin6_addr);
 127         peer->recv_badroutes++;
 128 }
 129
 130 void ripng_peer_bad_packet(struct sockaddr_in6 *from)
 131 {
 132         struct ripng_peer *peer;
 133         peer = ripng_peer_get(&from->sin6_addr);
 134         peer->recv_badpackets++;
 135 }
 136
 137 /* Display peer uptime. */
 138 static char *ripng_peer_uptime(struct ripng_peer *peer, char *buf, size_t len)
 139 {
 140         time_t uptime;
 141         struct tm *tm;
 142
 143         /* If there is no connection has been done before print `never'. */
 144         if (peer->uptime == 0) {
 145                 snprintf(buf, len, "never   ");
 146                 return buf;
 147         }
 148
 149         /* Get current time. */
 150         uptime = time(NULL);
 151         uptime -= peer->uptime;
 152         tm = gmtime(&uptime);
 153
 154         if (uptime < ONE_DAY_SECOND)
 155                 snprintf(buf, len, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
 156                          tm->tm_sec);
 157         else if (uptime < ONE_WEEK_SECOND)
 158                 snprintf(buf, len, "%dd%02dh%02dm", tm->tm_yday, tm->tm_hour,
 159                          tm->tm_min);
 160         else
 161                 snprintf(buf, len, "%02dw%dd%02dh", tm->tm_yday / 7,
 162                          tm->tm_yday - ((tm->tm_yday / 7) * 7), tm->tm_hour);
 163         return buf;
 164 }
 165
 166 void ripng_peer_display(struct vty *vty)
 167 {
 168         struct ripng_peer *peer;
 169         struct listnode *node, *nnode;
 170 #define RIPNG_UPTIME_LEN 25
 171         char timebuf[RIPNG_UPTIME_LEN];
 172
 173         for (ALL_LIST_ELEMENTS(peer_list, node, nnode, peer)) {
 174                 vty_out(vty, "    %s \n%14s %10d %10d %10d      %s\n",
 175                         inet6_ntoa(peer->addr), " ", peer->recv_badpackets,
 176                         peer->recv_badroutes, ZEBRA_RIPNG_DISTANCE_DEFAULT,
 177                         ripng_peer_uptime(peer, timebuf, RIPNG_UPTIME_LEN));
 178         }
 179 }
 180
 181 static int ripng_peer_list_cmp(struct ripng_peer *p1, struct ripng_peer *p2)
 182 {
 183         return memcmp(&p1->addr, &p2->addr, sizeof(struct in6_addr));
 184 }
 185
 186 void ripng_peer_init()
 187 {
 188         peer_list = list_new();
 189         peer_list->cmp = (int (*)(void *, void *))ripng_peer_list_cmp;
 190 }