76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
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/* $NetBSD: tlv.c,v 1.1 2010/12/08 07:20:15 kefren Exp $ */
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/*-
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* Copyright (c) 2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Mihai Chelaru <kefren@NetBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <stdio.h>
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#include "ldp.h"
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#include "fsm.h"
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#include "ldp_errors.h"
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#include "tlv.h"
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/* Reads and checks a tlv struct from a buffer */
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struct hello_tlv *
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get_hello_tlv(unsigned char *s, uint max)
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{
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struct hello_tlv *t;
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/* Do we have at least Type + Length + MSG_ID ? */
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if (max <= TLV_TYPE_LENGTH + MSGID_SIZE)
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return NULL;
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t = (struct hello_tlv *) s;
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if (ntohs(t->type) != LDP_HELLO)
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return NULL;
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/* Does its size fit into max ? */
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if (ntohs(t->length) + TLV_TYPE_LENGTH > max)
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return NULL;
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t->type = ntohs(t->type);
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t->length = ntohs(t->length);
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t->messageid = ntohl(t->messageid);
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return t;
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/* We don't check for Common Hello Params here */
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}
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/* Prints out some information about TLV */
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void
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debug_tlv(struct tlv * t)
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{
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warnp("TLV type %.4X, Length %d, Message ID %.8X\n", ntohs(t->type),
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ntohs(t->length), ntohs(t->messageid));
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}
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