bpf_dump.c

基于linux下的故障录波前置程序

/*
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/libpcap/bpf_dump.c,v 1.13.2.1 2003/11/15 23:26:37 guy Exp $ (LBL)";
#endif

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

#include <pcap.h>
#include <stdio.h>

void
bpf_dump(struct bpf_program *p, int option)
{
	struct bpf_insn *insn;
	int i;
	int n = p->bf_len;

	insn = p->bf_insns;
	if (option > 2) {
		printf("%d\n", n);
		for (i = 0; i < n; ++insn, ++i) {
			printf("%u %u %u %u\n", insn->code,
			       insn->jt, insn->jf, insn->k);
		}
		return ;
	}
	if (option > 1) {
		for (i = 0; i < n; ++insn, ++i)
			printf("{ 0x%x, %d, %d, 0x%08x },\n",
			       insn->code, insn->jt, insn->jf, insn->k);
		return;
	}
	for (i = 0; i < n; ++insn, ++i) {
#ifdef BDEBUG
		extern int bids[];
		printf(bids[i] > 0 ? "[%02d]" : " -- ", bids[i] - 1);
#endif
		puts(bpf_image(insn, i));
	}
}