/* $NetBSD: notifications.c,v 1.3 2013/07/11 05:45:23 kefren Exp $ */

/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mihai Chelaru <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#include <arpa/inet.h>

#include <stdlib.h>

#include "ldp.h"
#include "socketops.h"
#include "tlv.h"
#include "ldp_errors.h"
#include "notifications.h"

/* builds a notification TLV. Do not forget to free the result */
struct notification_tlv *
build_notification(uint32_t msg, uint32_t n)
{
       struct notification_tlv *t;
       t = malloc(sizeof(*t));

       if (!t) {
               fatalp("build_notification: malloc problem\n");
               return NULL;
       }

       t->type = htons(LDP_NOTIFICATION);
       t->length = htons(sizeof(struct notification_tlv) - TLV_TYPE_LENGTH);
       t->status = htons(TLV_STATUS);
       t->st_len = sizeof(struct notification_tlv) - 2 * TLV_TYPE_LENGTH;
       t->st_code = htonl(n);
       t->msg_id = htonl(msg);
       t->msg_type = 0;
       return t;

}

int
send_notification(const struct ldp_peer * p, uint32_t msg, uint32_t code)
{
       struct notification_tlv *nt;
       int             rv;

       if (p->state != LDP_PEER_CONNECTED && p->state != LDP_PEER_ESTABLISHED)
               return -1;

       nt = build_notification(msg, code);

       rv = send_tlv(p, (struct tlv *) nt);
       free(nt);
       return rv;
}