bpf_dump.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 71 行

/*
 * Copyright (c) 1990 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.
 *
 * SCCSID: @(#)bpf_dump.c	4.1	ULTRIX	1/25/91
 */

#include <sys/types.h>
#include <sys/time.h>
#include <net/bpf.h>

char *enum_strings[] = {
#ifdef __STDC__
#define OPDEF(op,s) #op ,
#else
#define OPDEF(op,s) "op",
#endif
#include <net/bpfcodes.h>
#undef OPDEF
};

void
bpf_dump(p, option)
	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("%lu %lu %lu %lu\n", insn->code,
			       insn->jt, insn->jf, insn->k);
		}
		return ;
	}
	if (option > 1) {
		for (i = 0; i < n; ++insn, ++i)
			printf("{ %s, %d, %d, 0x%08x },\n", 
			       enum_strings[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));
	}
}