| /* |
| * 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 1.28 2008-01-02 04:16:46 guy Exp $ (LBL)"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifdef WIN32 |
| #include <pcap-stdinc.h> |
| #else /* WIN32 */ |
| #if HAVE_INTTYPES_H |
| #include <inttypes.h> |
| #elif HAVE_STDINT_H |
| #include <stdint.h> |
| #endif |
| #ifdef HAVE_SYS_BITYPES_H |
| #include <sys/bitypes.h> |
| #endif |
| #include <sys/types.h> |
| #endif /* WIN32 */ |
| |
| #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; |
| } |