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[] _U_ =
45 "@(#) $Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.10.2.3 2003/12/29 22:42:20 hannes Exp $";
47 #include <tcpdump-stdinc.h>
50 #include "interface.h"
52 #define ASCII_LINELENGTH 300
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 *ident, 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[ASCII_LINELENGTH+1], *asp;
68 u_int maxlength = (Aflag ? ASCII_LINELENGTH : HEXDUMP_SHORTS_PER_LINE);
70 nshorts = length / sizeof(u_short);
72 hsp = hexstuff; asp = asciistuff;
73 if (Aflag) *(asp++) = '\n';
74 while (--nshorts >= 0) {
79 *(asp++) = (isgraph(s1) ? s1 : (s1 != '\t' && s1 != ' ' && s1 != '\n' && s1 != '\r' ? '.' : s1) );
80 *(asp++) = (isgraph(s2) ? s2 : (s2 != '\t' && s2 != ' ' && s2 != '\n' && s2 != '\r' ? '.' : s2) );
81 if (s1 == '\n' || s2 == '\n') i = maxlength;
84 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
86 hsp += HEXDUMP_HEXSTUFF_PER_SHORT;
87 *(asp++) = (isgraph(s1) ? s1 : '.');
88 *(asp++) = (isgraph(s2) ? s2 : '.');
94 (void)printf("%s", asciistuff);
96 (void)printf("%s0x%04x: %-*s %s",
97 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
98 hexstuff, asciistuff);
100 i = 0; hsp = hexstuff; asp = asciistuff;
101 oset += HEXDUMP_BYTES_PER_LINE;
107 *(asp++) = (isgraph(s1) ? s1 : (s1 != '\t' && s1 != ' ' && s1 != '\n' && s1 != '\r' ? '.' : s1) );
109 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
112 *(asp++) = (isgraph(s1) ? s1 : '.');
119 (void)printf("%s%s", ident, asciistuff);
121 (void)printf("%s0x%04x: %-*s %s",
122 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
123 hexstuff, asciistuff);
129 ascii_print(register const u_char *ident, register const u_char *cp, register u_int length)
131 ascii_print_with_offset(ident, cp, length, 0);
135 * telnet_print() wants this. It is essentially default_print_unaligned()
138 hex_print_with_offset(register const u_char *ident, register const u_char *cp, register u_int length,
142 register int nshorts;
144 nshorts = (u_int) length / sizeof(u_short);
146 while (--nshorts >= 0) {
147 if ((i++ % 8) == 0) {
148 (void)printf("%s0x%04x: ", ident, oset);
149 oset += HEXDUMP_BYTES_PER_LINE;
152 (void)printf(" %02x%02x", s, *cp++);
156 (void)printf("%s0x%04x: ", ident, oset);
157 (void)printf(" %02x", *cp);
162 * just for completeness
165 hex_print(register const u_char *ident, register const u_char *cp, register u_int length)
167 hex_print_with_offset(ident, cp, length, 0);
172 main(int argc, char *argv[])
174 hex_print("Hello, World!\n", 14);
176 ascii_print("Hello, World!\n", 14);
178 #define TMSG "Now is the winter of our discontent...\n"
179 ascii_print_with_offset(TMSG, sizeof(TMSG) - 1, 0x100);