1 /* $NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $ */
4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Alan Barrett and Simon J. Gerraty.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
44 static const char rcsid[] =
45 "@(#) $Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.6 2000/01/29 16:47:46 itojun Exp $";
48 #include <sys/types.h>
51 #include "interface.h"
53 #define HEXDUMP_BYTES_PER_LINE 16
54 #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2)
55 #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */
56 #define HEXDUMP_HEXSTUFF_PER_LINE \
57 (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE)
60 ascii_print_with_offset(register const u_char *cp, register u_int length,
66 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp;
67 char asciistuff[HEXDUMP_BYTES_PER_LINE+1], *asp;
69 nshorts = length / sizeof(u_short);
71 hsp = hexstuff; asp = asciistuff;
72 while (--nshorts >= 0) {
75 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
77 hsp += HEXDUMP_HEXSTUFF_PER_SHORT;
78 *(asp++) = (isgraph(s1) ? s1 : '.');
79 *(asp++) = (isgraph(s2) ? s2 : '.');
80 if (++i >= HEXDUMP_SHORTS_PER_LINE) {
82 (void)printf("\n0x%04x\t%-*s\t%s",
83 oset, HEXDUMP_HEXSTUFF_PER_LINE,
84 hexstuff, asciistuff);
85 i = 0; hsp = hexstuff; asp = asciistuff;
86 oset += HEXDUMP_BYTES_PER_LINE;
91 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
94 *(asp++) = (isgraph(s1) ? s1 : '.');
99 (void)printf("\n0x%04x\t%-*s\t%s",
100 oset, HEXDUMP_HEXSTUFF_PER_LINE,
101 hexstuff, asciistuff);
106 ascii_print(register const u_char *cp, register u_int length)
108 ascii_print_with_offset(cp, length, 0);
112 * telnet_print() wants this. It is essentially default_print_unaligned()
115 hex_print_with_offset(register const u_char *cp, register u_int length,
119 register int nshorts;
121 nshorts = (u_int) length / sizeof(u_short);
123 while (--nshorts >= 0) {
124 if ((i++ % 8) == 0) {
125 (void)printf("\n0x%04x\t", oset);
126 oset += HEXDUMP_BYTES_PER_LINE;
129 (void)printf(" %02x%02x", s, *cp++);
133 (void)printf("\n0x%04x\t", oset);
134 (void)printf(" %02x", *cp);
139 * just for completeness
142 hex_print(register const u_char *cp, register u_int length)
144 hex_print_with_offset(cp, length, 0);
149 main(int argc, char *argv[])
151 hex_print("Hello, World!\n", 14);
153 ascii_print("Hello, World!\n", 14);
155 #define TMSG "Now is the winter of our discontent...\n"
156 ascii_print_with_offset(TMSG, sizeof(TMSG) - 1, 0x100);