ripd/rip_peer.c

   1 /* RIP 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 #include <zebra.h>
  22
  23 #include "if.h"
  24 #include "prefix.h"
  25 #include "command.h"
  26 #include "linklist.h"
  27 #include "thread.h"
  28 #include "memory.h"
  29
  30 #include "ripd/ripd.h"
  31
  32 static struct rip_peer *rip_peer_new(void)
  33 {
  34         return XCALLOC(MTYPE_RIP_PEER, sizeof(struct rip_peer));
  35 }
  36
  37 static void rip_peer_free(struct rip_peer *peer)
  38 {
  39         RIP_TIMER_OFF(peer->t_timeout);
  40         XFREE(MTYPE_RIP_PEER, peer);
  41 }
  42
  43 struct rip_peer *rip_peer_lookup(struct rip *rip, struct in_addr *addr)
  44 {
  45         struct rip_peer *peer;
  46         struct listnode *node, *nnode;
  47
  48         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
  49                 if (IPV4_ADDR_SAME(&peer->addr, addr))
  50                         return peer;
  51         }
  52         return NULL;
  53 }
  54
  55 struct rip_peer *rip_peer_lookup_next(struct rip *rip, struct in_addr *addr)
  56 {
  57         struct rip_peer *peer;
  58         struct listnode *node, *nnode;
  59
  60         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
  61                 if (htonl(peer->addr.s_addr) > htonl(addr->s_addr))
  62                         return peer;
  63         }
  64         return NULL;
  65 }
  66
  67 /* RIP peer is timeout. */
  68 static int rip_peer_timeout(struct thread *t)
  69 {
  70         struct rip_peer *peer;
  71
  72         peer = THREAD_ARG(t);
  73         listnode_delete(peer->rip->peer_list, peer);
  74         rip_peer_free(peer);
  75
  76         return 0;
  77 }
  78
  79 /* Get RIP peer.  At the same time update timeout thread. */
  80 static struct rip_peer *rip_peer_get(struct rip *rip, struct in_addr *addr)
  81 {
  82         struct rip_peer *peer;
  83
  84         peer = rip_peer_lookup(rip, addr);
  85
  86         if (peer) {
  87                 if (peer->t_timeout)
  88                         thread_cancel(peer->t_timeout);
  89         } else {
  90                 peer = rip_peer_new();
  91                 peer->rip = rip;
  92                 peer->addr = *addr;
  93                 listnode_add_sort(rip->peer_list, peer);
  94         }
  95
  96         /* Update timeout thread. */
  97         peer->t_timeout = NULL;
  98         thread_add_timer(master, rip_peer_timeout, peer, RIP_PEER_TIMER_DEFAULT,
  99                          &peer->t_timeout);
 100
 101         /* Last update time set. */
 102         time(&peer->uptime);
 103
 104         return peer;
 105 }
 106
 107 void rip_peer_update(struct rip *rip, struct sockaddr_in *from, uint8_t version)
 108 {
 109         struct rip_peer *peer;
 110         peer = rip_peer_get(rip, &from->sin_addr);
 111         peer->version = version;
 112 }
 113
 114 void rip_peer_bad_route(struct rip *rip, struct sockaddr_in *from)
 115 {
 116         struct rip_peer *peer;
 117         peer = rip_peer_get(rip, &from->sin_addr);
 118         peer->recv_badroutes++;
 119 }
 120
 121 void rip_peer_bad_packet(struct rip *rip, struct sockaddr_in *from)
 122 {
 123         struct rip_peer *peer;
 124         peer = rip_peer_get(rip, &from->sin_addr);
 125         peer->recv_badpackets++;
 126 }
 127
 128 /* Display peer uptime. */
 129 static char *rip_peer_uptime(struct rip_peer *peer, char *buf, size_t len)
 130 {
 131         time_t uptime;
 132         struct tm *tm;
 133
 134         /* If there is no connection has been done before print `never'. */
 135         if (peer->uptime == 0) {
 136                 snprintf(buf, len, "never   ");
 137                 return buf;
 138         }
 139
 140         /* Get current time. */
 141         uptime = time(NULL);
 142         uptime -= peer->uptime;
 143         tm = gmtime(&uptime);
 144
 145         if (uptime < ONE_DAY_SECOND)
 146                 snprintf(buf, len, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
 147                          tm->tm_sec);
 148         else if (uptime < ONE_WEEK_SECOND)
 149                 snprintf(buf, len, "%dd%02dh%02dm", tm->tm_yday, tm->tm_hour,
 150                          tm->tm_min);
 151         else
 152                 snprintf(buf, len, "%02dw%dd%02dh", tm->tm_yday / 7,
 153                          tm->tm_yday - ((tm->tm_yday / 7) * 7), tm->tm_hour);
 154         return buf;
 155 }
 156
 157 void rip_peer_display(struct vty *vty, struct rip *rip)
 158 {
 159         struct rip_peer *peer;
 160         struct listnode *node, *nnode;
 161 #define RIP_UPTIME_LEN 25
 162         char timebuf[RIP_UPTIME_LEN];
 163
 164         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
 165                 vty_out(vty, "    %-16s %9d %9d %9d   %s\n",
 166                         inet_ntoa(peer->addr), peer->recv_badpackets,
 167                         peer->recv_badroutes, ZEBRA_RIP_DISTANCE_DEFAULT,
 168                         rip_peer_uptime(peer, timebuf, RIP_UPTIME_LEN));
 169         }
 170 }
 171
 172 int rip_peer_list_cmp(struct rip_peer *p1, struct rip_peer *p2)
 173 {
 174         if (p2->addr.s_addr == p1->addr.s_addr)
 175                 return 0;
 176
 177         return (htonl(p1->addr.s_addr) < htonl(p2->addr.s_addr)) ? -1 : 1;
 178 }
 179
 180 void rip_peer_list_del(void *arg)
 181 {
 182         rip_peer_free(arg);
 183 }