bpf_dump.c

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/* 
 * Copyright (c) 1992, 1993, 1994, 1995
 *      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.
 */

#include <stdio.h>
#include <sys/types.h>

#include "interfac.h"

void bpf_dump (struct bpf_program *p, int option)
{
#ifdef BDEBUG
  extern int bids[];
#endif
  struct bpf_insn *insn = p->bf_insns;
  int              i, n = p->bf_len;

  if (option > 2)
  {
    printf ("%d\n", n);
    for (i = 0; i < n; insn++, i++)
       printf ("%3u %3u %3u %lu\n", insn->code, insn->jt, insn->jf, insn->k);
    return;
  }
  if (option > 1)
  {
    for (i = 0; i < n; insn++, i++)
      printf ("{ 0x%02x, %2d, %2d, 0x%08lx },\n",
              insn->code, insn->jt, insn->jf, insn->k);
    return;
  }

  for (i = 0; i < n; ++insn, i++)
  {
    if (i == 0)
#ifdef BDEBUG
       printf ("     Addr instr                     jump true false\n");
    printf (bids[i] > 0 ? "[%02d]" : " -- ", bids[i] - 1);
#else
       printf (" Addr instr                     jump true false\n");
#endif
    puts (bpf_image(insn,i));
  }
}