1 /* $OpenBSD: keepalive.c,v 1.17 2016/07/01 23:36:38 renato Exp $ */
2
3 /*
4 * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20 #include <string.h>
21
22 #include "ldpd.h"
23 #include "ldpe.h"
24 #include "log.h"
25
26 void
send_keepalive(struct nbr * nbr)27 send_keepalive(struct nbr *nbr)
28 {
29 struct ibuf *buf;
30 uint16_t size;
31
32 size = LDP_HDR_SIZE + LDP_MSG_SIZE;
33 if ((buf = ibuf_open(size)) == NULL)
34 fatal(__func__);
35
36 gen_ldp_hdr(buf, size);
37 size -= LDP_HDR_SIZE;
38 gen_msg_hdr(buf, MSG_TYPE_KEEPALIVE, size);
39
40 evbuf_enqueue(&nbr->tcp->wbuf, buf);
41 }
42
43 int
recv_keepalive(struct nbr * nbr,char * buf,uint16_t len)44 recv_keepalive(struct nbr *nbr, char *buf, uint16_t len)
45 {
46 struct ldp_msg msg;
47
48 memcpy(&msg, buf, sizeof(msg));
49 if (len != LDP_MSG_SIZE) {
50 session_shutdown(nbr, S_BAD_MSG_LEN, msg.id, msg.type);
51 return (-1);
52 }
53
54 if (nbr->state != NBR_STA_OPER)
55 nbr_fsm(nbr, NBR_EVT_KEEPALIVE_RCVD);
56
57 return (0);
58 }
59