/* $OpenBSD: keepalive.c,v 1.11 2013/10/15 20:27:40 renato Exp $ */ /* * Copyright (c) 2009 Michele Marchetto * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #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)); }