bpf_image.c
上传用户:tjescc
上传日期:2021-02-23
资源大小:419k
文件大小:5k
- /*
- * 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[] =
- "@(#) $Header: /usr/local/cvs/nessus-libraries/libpcap-nessus/bpf_image.c,v 1.3 2003/02/06 20:28:07 renaud Exp $ (LBL)";
- #endif
- #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 %dtjf %d"
- : "(%03d) %-8s %s",
- n, op, operand, n + 1 + p->jt, n + 1 + p->jf);
- return image;
- }