NetBSD/dist/tcpdump/print-bxxp.c

/*	$NetBSD: print-bxxp.c,v 1.2 2001/06/25 19:59:57 itojun Exp $	*/

/*
 * Copyright (C) 2000, Richard Sharpe
 *
 * This software may be distributed either under the terms of the 
 * BSD-style licence that accompanies tcpdump or under the GNU GPL 
 * version 2 or later.
 *
 * print-bxxp.c
 *
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char rcsid[] =
  "@(#) Header: /tcpdump/master/tcpdump/print-bxxp.c,v 1.4 2001/06/15 07:45:42 itojun Exp";
#else
__RCSID("$NetBSD: print-bxxp.c,v 1.2 2001/06/25 19:59:57 itojun Exp $");
#endif
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/param.h>
#include <sys/time.h>

#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "interface.h"
#include "extract.h"

/* Check for a string but not go beyond length
 * Return TRUE on match, FALSE otherwise
 * 
 * Looks at the first few chars up to tl1 ...
 */

static int l_strnstart(const u_char *, u_int, const u_char *, u_int);

static int
l_strnstart(const u_char *tstr1, u_int tl1, const u_char *str2, u_int l2)
{

	if (tl1 > l2)
		return 0;

	return (strncmp(tstr1, str2, tl1) == 0 ? 1 : 0);
}

void
bxxp_print(const u_char *bp, u_int length)
{

	if (l_strnstart("REQ ", 4, bp, length)) /* A REQuest */
		printf(" BXXP REQ");
	else if (l_strnstart("RSP ", 4, bp, length))
		printf(" BXXP RSP");
	else if (l_strnstart("SEQ ", 4, bp, length))
		printf(" BXXP SEQ");
	else if (l_strnstart("END", 4, bp, length))
		printf(" BXXP END");
	else 
		printf(" BXXP (payload or undecoded)");
}