ldpd/keepalive.c

   1 // SPDX-License-Identifier: ISC
   2 /*      $OpenBSD$ */
   3
   4 /*
   5  * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org>
   6  */
   7
   8 #include <zebra.h>
   9
  10 #include "ldpd.h"
  11 #include "ldpe.h"
  12 #include "log.h"
  13 #include "ldp_debug.h"
  14
  15 void
  16 send_keepalive(struct nbr *nbr)
  17 {
  18         struct ibuf     *buf;
  19         uint16_t         size;
  20
  21         size = LDP_HDR_SIZE + LDP_MSG_SIZE;
  22         if ((buf = ibuf_open(size)) == NULL)
  23                 fatal(__func__);
  24
  25         gen_ldp_hdr(buf, size);
  26         size -= LDP_HDR_SIZE;
  27         gen_msg_hdr(buf, MSG_TYPE_KEEPALIVE, size);
  28
  29         debug_kalive_send("keepalive: lsr-id %pI4", &nbr->id);
  30
  31         evbuf_enqueue(&nbr->tcp->wbuf, buf);
  32         nbr->stats.kalive_sent++;
  33 }
  34
  35 int
  36 recv_keepalive(struct nbr *nbr, char *buf, uint16_t len)
  37 {
  38         struct ldp_msg msg;
  39
  40         memcpy(&msg, buf, sizeof(msg));
  41         if (len != LDP_MSG_SIZE) {
  42                 session_shutdown(nbr, S_BAD_MSG_LEN, msg.id, msg.type);
  43                 return (-1);
  44         }
  45
  46         debug_kalive_recv("keepalive: lsr-id %pI4", &nbr->id);
  47
  48         if (nbr->state != NBR_STA_OPER)
  49                 nbr_fsm(nbr, NBR_EVT_KEEPALIVE_RCVD);
  50
  51         return (0);
  52 }