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 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 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