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/* RIP peer support
* Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
*
* This file is part of GNU Zebra.
*
* GNU Zebra is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* GNU Zebra is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "if.h"
#include "prefix.h"
#include "command.h"
#include "linklist.h"
#include "thread.h"
#include "memory.h"
#include "ripd/ripd.h"
DEFINE_MTYPE_STATIC(RIPD, RIP_PEER, "RIP peer")
static struct rip_peer *rip_peer_new(void)
{
return XCALLOC(MTYPE_RIP_PEER, sizeof(struct rip_peer));
}
static void rip_peer_free(struct rip_peer *peer)
{
RIP_TIMER_OFF(peer->t_timeout);
XFREE(MTYPE_RIP_PEER, peer);
}
struct rip_peer *rip_peer_lookup(struct rip *rip, struct in_addr *addr)
{
struct rip_peer *peer;
struct listnode *node, *nnode;
for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
if (IPV4_ADDR_SAME(&peer->addr, addr))
return peer;
}
return NULL;
}
struct rip_peer *rip_peer_lookup_next(struct rip *rip, struct in_addr *addr)
{
struct rip_peer *peer;
struct listnode *node, *nnode;
for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
if (htonl(peer->addr.s_addr) > htonl(addr->s_addr))
return peer;
}
return NULL;
}
/* RIP peer is timeout. */
static int rip_peer_timeout(struct thread *t)
{
struct rip_peer *peer;
peer = THREAD_ARG(t);
listnode_delete(peer->rip->peer_list, peer);
rip_peer_free(peer);
return 0;
}
/* Get RIP peer. At the same time update timeout thread. */
static struct rip_peer *rip_peer_get(struct rip *rip, struct in_addr *addr)
{
struct rip_peer *peer;
peer = rip_peer_lookup(rip, addr);
if (peer) {
if (peer->t_timeout)
thread_cancel(peer->t_timeout);
} else {
peer = rip_peer_new();
peer->rip = rip;
peer->addr = *addr;
listnode_add_sort(rip->peer_list, peer);
}
/* Update timeout thread. */
peer->t_timeout = NULL;
thread_add_timer(master, rip_peer_timeout, peer, RIP_PEER_TIMER_DEFAULT,
&peer->t_timeout);
/* Last update time set. */
time(&peer->uptime);
return peer;
}
void rip_peer_update(struct rip *rip, struct sockaddr_in *from, uint8_t version)
{
struct rip_peer *peer;
peer = rip_peer_get(rip, &from->sin_addr);
peer->version = version;
}
void rip_peer_bad_route(struct rip *rip, struct sockaddr_in *from)
{
struct rip_peer *peer;
peer = rip_peer_get(rip, &from->sin_addr);
peer->recv_badroutes++;
}
void rip_peer_bad_packet(struct rip *rip, struct sockaddr_in *from)
{
struct rip_peer *peer;
peer = rip_peer_get(rip, &from->sin_addr);
peer->recv_badpackets++;
}
/* Display peer uptime. */
static char *rip_peer_uptime(struct rip_peer *peer, char *buf, size_t len)
{
time_t uptime;
/* If there is no connection has been done before print `never'. */
if (peer->uptime == 0) {
snprintf(buf, len, "never ");
return buf;
}
/* Get current time. */
uptime = time(NULL);
uptime -= peer->uptime;
frrtime_to_interval(uptime, buf, len);
return buf;
}
void rip_peer_display(struct vty *vty, struct rip *rip)
{
struct rip_peer *peer;
struct listnode *node, *nnode;
#define RIP_UPTIME_LEN 25
char timebuf[RIP_UPTIME_LEN];
for (ALL_LIST_ELEMENTS(rip->peer_list, node, nnode, peer)) {
vty_out(vty, " %-16s %9d %9d %9d %s\n",
inet_ntoa(peer->addr), peer->recv_badpackets,
peer->recv_badroutes, ZEBRA_RIP_DISTANCE_DEFAULT,
rip_peer_uptime(peer, timebuf, RIP_UPTIME_LEN));
}
}
int rip_peer_list_cmp(struct rip_peer *p1, struct rip_peer *p2)
{
if (p2->addr.s_addr == p1->addr.s_addr)
return 0;
return (htonl(p1->addr.s_addr) < htonl(p2->addr.s_addr)) ? -1 : 1;
}
void rip_peer_list_del(void *arg)
{
rip_peer_free(arg);
}
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