text: /*
   * 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.
   */
  #include <sys/types.h>
  #include <sys/time.h>
  
  #include <stdio.h>
  #include <string.h>
  
  #include "pcap-int.h"
  
  #include "gnuc.h"
  #ifdef HAVE_OS_PROTO_H
  #include "os-proto.h"
  #endif
  
  char *
  bpf_image(p, n)
  	struct bpf_insn *p;
  	int n;
  {
  	int v;
  	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)sprintf(operand, fmt, v);
  	(void)sprintf(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;
  }
  