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Network/libpcap-1.9.0/bpf_image.c 7.38 KB
fee2cbd6   amoreau   ajout des librairies
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  /*
   * 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.
   */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  
  #include <pcap-types.h>
  
  #include <stdio.h>
  #include <string.h>
  
  #include "pcap-int.h"
  
  #ifdef HAVE_OS_PROTO_H
  #include "os-proto.h"
  #endif
  
  char *
  bpf_image(const struct bpf_insn *p, int n)
  {
  	const char *op;
  	static char image[256];
  	char operand_buf[64];
  	const char *operand;
  
  	switch (p->code) {
  
  	default:
  		op = "unimp";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "0x%x", p->code);
  		operand = operand_buf;
  		break;
  
  	case BPF_RET|BPF_K:
  		op = "ret";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_RET|BPF_A:
  		op = "ret";
  		operand = "";
  		break;
  
  	case BPF_LD|BPF_W|BPF_ABS:
  		op = "ld";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_H|BPF_ABS:
  		op = "ldh";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_B|BPF_ABS:
  		op = "ldb";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_W|BPF_LEN:
  		op = "ld";
  		operand = "#pktlen";
  		break;
  
  	case BPF_LD|BPF_W|BPF_IND:
  		op = "ld";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[x + %d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_H|BPF_IND:
  		op = "ldh";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[x + %d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_B|BPF_IND:
  		op = "ldb";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "[x + %d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_IMM:
  		op = "ld";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LDX|BPF_IMM:
  		op = "ldx";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LDX|BPF_MSH|BPF_B:
  		op = "ldxb";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "4*([%d]&0xf)", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LD|BPF_MEM:
  		op = "ld";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "M[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_LDX|BPF_MEM:
  		op = "ldx";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "M[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ST:
  		op = "st";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "M[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_STX:
  		op = "stx";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "M[%d]", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JA:
  		op = "ja";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "%d", n + 1 + p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JGT|BPF_K:
  		op = "jgt";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JGE|BPF_K:
  		op = "jge";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JEQ|BPF_K:
  		op = "jeq";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JSET|BPF_K:
  		op = "jset";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_JMP|BPF_JGT|BPF_X:
  		op = "jgt";
  		operand = "x";
  		break;
  
  	case BPF_JMP|BPF_JGE|BPF_X:
  		op = "jge";
  		operand = "x";
  		break;
  
  	case BPF_JMP|BPF_JEQ|BPF_X:
  		op = "jeq";
  		operand = "x";
  		break;
  
  	case BPF_JMP|BPF_JSET|BPF_X:
  		op = "jset";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_ADD|BPF_X:
  		op = "add";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_SUB|BPF_X:
  		op = "sub";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_MUL|BPF_X:
  		op = "mul";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_DIV|BPF_X:
  		op = "div";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_MOD|BPF_X:
  		op = "mod";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_AND|BPF_X:
  		op = "and";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_OR|BPF_X:
  		op = "or";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_XOR|BPF_X:
  		op = "xor";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_LSH|BPF_X:
  		op = "lsh";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_RSH|BPF_X:
  		op = "rsh";
  		operand = "x";
  		break;
  
  	case BPF_ALU|BPF_ADD|BPF_K:
  		op = "add";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_SUB|BPF_K:
  		op = "sub";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_MUL|BPF_K:
  		op = "mul";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_DIV|BPF_K:
  		op = "div";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_MOD|BPF_K:
  		op = "mod";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_AND|BPF_K:
  		op = "and";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_OR|BPF_K:
  		op = "or";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_XOR|BPF_K:
  		op = "xor";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#0x%x", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_LSH|BPF_K:
  		op = "lsh";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_RSH|BPF_K:
  		op = "rsh";
  		(void)pcap_snprintf(operand_buf, sizeof operand_buf, "#%d", p->k);
  		operand = operand_buf;
  		break;
  
  	case BPF_ALU|BPF_NEG:
  		op = "neg";
  		operand = "";
  		break;
  
  	case BPF_MISC|BPF_TAX:
  		op = "tax";
  		operand = "";
  		break;
  
  	case BPF_MISC|BPF_TXA:
  		op = "txa";
  		operand = "";
  		break;
  	}
  	if (BPF_CLASS(p->code) == BPF_JMP && BPF_OP(p->code) != BPF_JA) {
  		(void)pcap_snprintf(image, sizeof image,
  			      "(%03d) %-8s %-16s jt %d\tjf %d",
  			      n, op, operand, n + 1 + p->jt, n + 1 + p->jf);
  	} else {
  		(void)pcap_snprintf(image, sizeof image,
  			      "(%03d) %-8s %s",
  			      n, op, operand);
  	}
  	return image;
  }