diff options
Diffstat (limited to 'usr.sbin/tcpdump/tcpdump/bpf_image.c')
| -rw-r--r-- | usr.sbin/tcpdump/tcpdump/bpf_image.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/usr.sbin/tcpdump/tcpdump/bpf_image.c b/usr.sbin/tcpdump/tcpdump/bpf_image.c new file mode 100644 index 000000000000..d36eab252f7c --- /dev/null +++ b/usr.sbin/tcpdump/tcpdump/bpf_image.c @@ -0,0 +1,282 @@ +/* + * Copyright (c) 1988-1990 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 char rcsid[] = + "@(#) $Header: bpf_image.c,v 1.10 92/01/26 21:01:16 mccanne Exp $ (LBL)"; +#endif + +#include <stdio.h> +#include <string.h> + +#include <sys/types.h> +#include <sys/time.h> +#include <net/bpf.h> + +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 + 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 = "#%d"; + break; + + case BPF_ALU|BPF_OR|BPF_K: + op = "or"; + fmt = "#%d"; + 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; +} |