Line data    Source code

       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           3 : DEFINE_MTYPE_STATIC(RIPD, RIP_PEER, "RIP peer");
      33             : 
      34           0 : static struct rip_peer *rip_peer_new(void)
      35             : {
      36           0 :         return XCALLOC(MTYPE_RIP_PEER, sizeof(struct rip_peer));
      37             : }
      38             : 
      39           0 : static void rip_peer_free(struct rip_peer *peer)
      40             : {
      41           0 :         THREAD_OFF(peer->t_timeout);
      42           0 :         XFREE(MTYPE_RIP_PEER, peer);
      43           0 : }
      44             : 
      45           0 : struct rip_peer *rip_peer_lookup(struct rip *rip, struct in_addr *addr)
      46             : {
      47           0 :         struct rip_peer *peer;
      48           0 :         struct listnode *node, *nnode;
      49             : 
      50           0 :         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
      51           0 :                 if (IPV4_ADDR_SAME(&peer->addr, addr))
      52           0 :                         return peer;
      53             :         }
      54             :         return NULL;
      55             : }
      56             : 
      57           0 : struct rip_peer *rip_peer_lookup_next(struct rip *rip, struct in_addr *addr)
      58             : {
      59           0 :         struct rip_peer *peer;
      60           0 :         struct listnode *node, *nnode;
      61             : 
      62           0 :         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
      63           0 :                 if (htonl(peer->addr.s_addr) > htonl(addr->s_addr))
      64           0 :                         return peer;
      65             :         }
      66             :         return NULL;
      67             : }
      68             : 
      69             : /* RIP peer is timeout. */
      70           0 : static void rip_peer_timeout(struct thread *t)
      71             : {
      72           0 :         struct rip_peer *peer;
      73             : 
      74           0 :         peer = THREAD_ARG(t);
      75           0 :         listnode_delete(peer->rip->peer_list, peer);
      76           0 :         rip_peer_free(peer);
      77           0 : }
      78             : 
      79             : /* Get RIP peer.  At the same time update timeout thread. */
      80           0 : static struct rip_peer *rip_peer_get(struct rip *rip, struct in_addr *addr)
      81             : {
      82           0 :         struct rip_peer *peer;
      83             : 
      84           0 :         peer = rip_peer_lookup(rip, addr);
      85             : 
      86           0 :         if (peer) {
      87           0 :                 THREAD_OFF(peer->t_timeout);
      88             :         } else {
      89           0 :                 peer = rip_peer_new();
      90           0 :                 peer->rip = rip;
      91           0 :                 peer->addr = *addr;
      92           0 :                 listnode_add_sort(rip->peer_list, peer);
      93             :         }
      94             : 
      95             :         /* Update timeout thread. */
      96           0 :         thread_add_timer(master, rip_peer_timeout, peer, RIP_PEER_TIMER_DEFAULT,
      97             :                          &peer->t_timeout);
      98             : 
      99             :         /* Last update time set. */
     100           0 :         time(&peer->uptime);
     101             : 
     102           0 :         return peer;
     103             : }
     104             : 
     105           0 : void rip_peer_update(struct rip *rip, struct sockaddr_in *from, uint8_t version)
     106             : {
     107           0 :         struct rip_peer *peer;
     108           0 :         peer = rip_peer_get(rip, &from->sin_addr);
     109           0 :         peer->version = version;
     110           0 : }
     111             : 
     112           0 : void rip_peer_bad_route(struct rip *rip, struct sockaddr_in *from)
     113             : {
     114           0 :         struct rip_peer *peer;
     115           0 :         peer = rip_peer_get(rip, &from->sin_addr);
     116           0 :         peer->recv_badroutes++;
     117           0 : }
     118             : 
     119           0 : void rip_peer_bad_packet(struct rip *rip, struct sockaddr_in *from)
     120             : {
     121           0 :         struct rip_peer *peer;
     122           0 :         peer = rip_peer_get(rip, &from->sin_addr);
     123           0 :         peer->recv_badpackets++;
     124           0 : }
     125             : 
     126             : /* Display peer uptime. */
     127           0 : static char *rip_peer_uptime(struct rip_peer *peer, char *buf, size_t len)
     128             : {
     129           0 :         time_t uptime;
     130             : 
     131             :         /* If there is no connection has been done before print `never'. */
     132           0 :         if (peer->uptime == 0) {
     133           0 :                 snprintf(buf, len, "never   ");
     134           0 :                 return buf;
     135             :         }
     136             : 
     137             :         /* Get current time. */
     138           0 :         uptime = time(NULL);
     139           0 :         uptime -= peer->uptime;
     140             : 
     141           0 :         frrtime_to_interval(uptime, buf, len);
     142             : 
     143           0 :         return buf;
     144             : }
     145             : 
     146           1 : void rip_peer_display(struct vty *vty, struct rip *rip)
     147             : {
     148           1 :         struct rip_peer *peer;
     149           1 :         struct listnode *node, *nnode;
     150             : #define RIP_UPTIME_LEN 25
     151           1 :         char timebuf[RIP_UPTIME_LEN];
     152             : 
     153           2 :         for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
     154           0 :                 vty_out(vty, "    %-16pI4 %9d %9d %9d   %s\n",
     155             :                         &peer->addr, peer->recv_badpackets,
     156             :                         peer->recv_badroutes, ZEBRA_RIP_DISTANCE_DEFAULT,
     157             :                         rip_peer_uptime(peer, timebuf, RIP_UPTIME_LEN));
     158             :         }
     159           1 : }
     160             : 
     161           0 : int rip_peer_list_cmp(struct rip_peer *p1, struct rip_peer *p2)
     162             : {
     163           0 :         if (p2->addr.s_addr == p1->addr.s_addr)
     164             :                 return 0;
     165             : 
     166           0 :         return (htonl(p1->addr.s_addr) < htonl(p2->addr.s_addr)) ? -1 : 1;
     167             : }
     168             : 
     169           0 : void rip_peer_list_del(void *arg)
     170             : {
     171           0 :         rip_peer_free(arg);
     172           0 : }