ldpd/keepalive.c

   1 /*      $OpenBSD$ */
   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 <zebra.h>
  20
  21 #include "ldpd.h"
  22 #include "ldpe.h"
  23 #include "log.h"
  24 #include "ldp_debug.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         debug_kalive_send("keepalive: lsr-id %s", inet_ntoa(nbr->id));
  41
  42         evbuf_enqueue(&nbr->tcp->wbuf, buf);
  43         nbr->stats.kalive_sent++;
  44 }
  45
  46 int
  47 recv_keepalive(struct nbr *nbr, char *buf, uint16_t len)
  48 {
  49         struct ldp_msg msg;
  50
  51         memcpy(&msg, buf, sizeof(msg));
  52         if (len != LDP_MSG_SIZE) {
  53                 session_shutdown(nbr, S_BAD_MSG_LEN, msg.id, msg.type);
  54                 return (-1);
  55         }
  56
  57         debug_kalive_recv("keepalive: lsr-id %s", inet_ntoa(nbr->id));
  58
  59         if (nbr->state != NBR_STA_OPER)
  60                 nbr_fsm(nbr, NBR_EVT_KEEPALIVE_RCVD);
  61
  62         return (0);
  63 }