289 lines
4.9 KiB
C
289 lines
4.9 KiB
C
/*
|
|
* Copyright (c) 1990, 1991, 1992, 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_image.c,v 1.27.2.1 2008/01/02 04:22:16 guy Exp $ (LBL)";
|
|
#endif
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "pcap-int.h"
|
|
|
|
#ifdef HAVE_OS_PROTO_H
|
|
#include "os-proto.h"
|
|
#endif
|
|
|
|
char *
|
|
bpf_image(p, n)
|
|
const struct bpf_insn *p;
|
|
int n;
|
|
{
|
|
int v;
|
|
const char *fmt, *op;
|
|
static char image[256];
|
|
char operand[64];
|
|
|
|
v = p->k;
|
|
switch (p->code) {
|
|
|
|
default:
|
|
op = "unimp";
|
|
fmt = "0x%x";
|
|
v = p->code;
|
|
break;
|
|
|
|
case BPF_RET|BPF_K:
|
|
op = "ret";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_RET|BPF_A:
|
|
op = "ret";
|
|
fmt = "";
|
|
break;
|
|
|
|
case BPF_LD|BPF_W|BPF_ABS:
|
|
op = "ld";
|
|
fmt = "[%d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_H|BPF_ABS:
|
|
op = "ldh";
|
|
fmt = "[%d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_B|BPF_ABS:
|
|
op = "ldb";
|
|
fmt = "[%d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_W|BPF_LEN:
|
|
op = "ld";
|
|
fmt = "#pktlen";
|
|
break;
|
|
|
|
case BPF_LD|BPF_W|BPF_IND:
|
|
op = "ld";
|
|
fmt = "[x + %d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_H|BPF_IND:
|
|
op = "ldh";
|
|
fmt = "[x + %d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_B|BPF_IND:
|
|
op = "ldb";
|
|
fmt = "[x + %d]";
|
|
break;
|
|
|
|
case BPF_LD|BPF_IMM:
|
|
op = "ld";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_LDX|BPF_IMM:
|
|
op = "ldx";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_LDX|BPF_MSH|BPF_B:
|
|
op = "ldxb";
|
|
fmt = "4*([%d]&0xf)";
|
|
break;
|
|
|
|
case BPF_LD|BPF_MEM:
|
|
op = "ld";
|
|
fmt = "M[%d]";
|
|
break;
|
|
|
|
case BPF_LDX|BPF_MEM:
|
|
op = "ldx";
|
|
fmt = "M[%d]";
|
|
break;
|
|
|
|
case BPF_ST:
|
|
op = "st";
|
|
fmt = "M[%d]";
|
|
break;
|
|
|
|
case BPF_STX:
|
|
op = "stx";
|
|
fmt = "M[%d]";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JA:
|
|
op = "ja";
|
|
fmt = "%d";
|
|
v = n + 1 + p->k;
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JGT|BPF_K:
|
|
op = "jgt";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JGE|BPF_K:
|
|
op = "jge";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JEQ|BPF_K:
|
|
op = "jeq";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JSET|BPF_K:
|
|
op = "jset";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JGT|BPF_X:
|
|
op = "jgt";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JGE|BPF_X:
|
|
op = "jge";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JEQ|BPF_X:
|
|
op = "jeq";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_JMP|BPF_JSET|BPF_X:
|
|
op = "jset";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_ADD|BPF_X:
|
|
op = "add";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_SUB|BPF_X:
|
|
op = "sub";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_MUL|BPF_X:
|
|
op = "mul";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_DIV|BPF_X:
|
|
op = "div";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_AND|BPF_X:
|
|
op = "and";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_OR|BPF_X:
|
|
op = "or";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_LSH|BPF_X:
|
|
op = "lsh";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_RSH|BPF_X:
|
|
op = "rsh";
|
|
fmt = "x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_ADD|BPF_K:
|
|
op = "add";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_SUB|BPF_K:
|
|
op = "sub";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_MUL|BPF_K:
|
|
op = "mul";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_DIV|BPF_K:
|
|
op = "div";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_AND|BPF_K:
|
|
op = "and";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_OR|BPF_K:
|
|
op = "or";
|
|
fmt = "#0x%x";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_LSH|BPF_K:
|
|
op = "lsh";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_RSH|BPF_K:
|
|
op = "rsh";
|
|
fmt = "#%d";
|
|
break;
|
|
|
|
case BPF_ALU|BPF_NEG:
|
|
op = "neg";
|
|
fmt = "";
|
|
break;
|
|
|
|
case BPF_MISC|BPF_TAX:
|
|
op = "tax";
|
|
fmt = "";
|
|
break;
|
|
|
|
case BPF_MISC|BPF_TXA:
|
|
op = "txa";
|
|
fmt = "";
|
|
break;
|
|
}
|
|
(void)snprintf(operand, sizeof operand, fmt, v);
|
|
(void)snprintf(image, sizeof image,
|
|
(BPF_CLASS(p->code) == BPF_JMP &&
|
|
BPF_OP(p->code) != BPF_JA) ?
|
|
"(%03d) %-8s %-16s jt %d\tjf %d"
|
|
: "(%03d) %-8s %s",
|
|
n, op, operand, n + 1 + p->jt, n + 1 + p->jf);
|
|
return image;
|
|
}
|