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/* $OpenBSD: keepalive.c,v 1.12 2014/10/25 03:23:49 lteo Exp $ */
/*
* Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <net/if_dl.h>
#include <unistd.h>
#include <errno.h>
#include <event.h>
#include <stdlib.h>
#include <string.h>
#include "ldpd.h"
#include "ldp.h"
#include "log.h"
#include "ldpe.h"
void
send_keepalive(struct nbr *nbr)
{
struct ibuf *buf;
u_int16_t size;
if ((buf = ibuf_open(LDP_MAX_LEN)) == NULL)
fatal("send_keepalive");
size = LDP_HDR_SIZE + sizeof(struct ldp_msg);
gen_ldp_hdr(buf, size);
size -= LDP_HDR_SIZE;
gen_msg_tlv(buf, MSG_TYPE_KEEPALIVE, size);
evbuf_enqueue(&nbr->tcp->wbuf, buf);
}
int
recv_keepalive(struct nbr *nbr, char *buf, u_int16_t len)
{
struct ldp_msg ka;
bcopy(buf, &ka, sizeof(ka));
if (len != LDP_MSG_LEN) {
session_shutdown(nbr, S_BAD_MSG_LEN, ka.msgid, ka.type);
return (-1);
}
if (nbr->state != NBR_STA_OPER)
nbr_fsm(nbr, NBR_EVT_KEEPALIVE_RCVD);
return (ntohs(ka.length));
}
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