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freebsd-skq/contrib/libpcap/bpf_image.c
Hans Petter Selasky b00ab7548b MFV r333789: libpcap 1.9.0 (pre-release) 
MFC after:	1 month
Sponsored by:	Mellanox Technologies
2018-05-28 08:12:18 +00:00

333 lines
7.4 KiB
C
Raw Blame History

/*
* 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;
}
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