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.
39 /* \summary: ASCII packet dump printer */
45 #include "netdissect-stdinc.h"
49 #include "netdissect-ctype.h"
51 #include "netdissect.h"
54 #define ASCII_LINELENGTH 300
55 #define HEXDUMP_BYTES_PER_LINE 16
56 #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2)
57 #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */
58 #define HEXDUMP_HEXSTUFF_PER_LINE \
59 (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE)
62 ascii_print(netdissect_options *ndo,
63 const u_char *cp, u_int length)
67 int truncated = FALSE;
69 ndo->ndo_protocol = "ascii";
70 caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
71 if (length > caplength) {
82 * Don't print CRs at the end of the line; they
83 * don't belong at the ends of lines on UN*X,
84 * and the standard I/O library will give us one
85 * on Windows so we don't need to print one
88 * In the middle of a line, just print a '.'.
90 if (length > 1 && GET_U_1(cp) != '\n')
93 if (!ND_ASCII_ISGRAPH(s) &&
94 (s != '\t' && s != ' ' && s != '\n'))
101 nd_trunc_longjmp(ndo);
105 hex_and_ascii_print_with_offset(netdissect_options *ndo, const char *ident,
106 const u_char *cp, u_int length, u_int oset)
112 int truncated = FALSE;
113 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp;
114 char asciistuff[ASCII_LINELENGTH+1], *asp;
116 caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
117 if (length > caplength) {
121 nshorts = length / sizeof(u_short);
123 hsp = hexstuff; asp = asciistuff;
124 while (nshorts != 0) {
129 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
130 " %02x%02x", s1, s2);
131 hsp += HEXDUMP_HEXSTUFF_PER_SHORT;
132 *(asp++) = (char)(ND_ASCII_ISGRAPH(s1) ? s1 : '.');
133 *(asp++) = (char)(ND_ASCII_ISGRAPH(s2) ? s2 : '.');
135 if (i >= HEXDUMP_SHORTS_PER_LINE) {
137 ND_PRINT("%s0x%04x: %-*s %s",
138 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
139 hexstuff, asciistuff);
140 i = 0; hsp = hexstuff; asp = asciistuff;
141 oset += HEXDUMP_BYTES_PER_LINE;
148 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
151 *(asp++) = (char)(ND_ASCII_ISGRAPH(s1) ? s1 : '.');
156 ND_PRINT("%s0x%04x: %-*s %s",
157 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
158 hexstuff, asciistuff);
161 nd_trunc_longjmp(ndo);
165 hex_and_ascii_print(netdissect_options *ndo, const char *ident,
166 const u_char *cp, u_int length)
168 hex_and_ascii_print_with_offset(ndo, ident, cp, length, 0);
172 * telnet_print() wants this. It is essentially default_print_unaligned()
175 hex_print_with_offset(netdissect_options *ndo,
176 const char *ident, const u_char *cp, u_int length,
182 int truncated = FALSE;
184 caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
185 if (length > caplength) {
189 nshorts = length / sizeof(u_short);
191 while (nshorts != 0) {
192 if ((i++ % 8) == 0) {
193 ND_PRINT("%s0x%04x: ", ident, oset);
194 oset += HEXDUMP_BYTES_PER_LINE;
198 ND_PRINT(" %02x%02x", s, GET_U_1(cp));
204 ND_PRINT("%s0x%04x: ", ident, oset);
205 ND_PRINT(" %02x", GET_U_1(cp));
208 nd_trunc_longjmp(ndo);
212 hex_print(netdissect_options *ndo,
213 const char *ident, const u_char *cp, u_int length)
215 hex_print_with_offset(ndo, ident, cp, length, 0);
220 main(int argc, char *argv[])
222 hex_print("\n\t", "Hello, World!\n", 14);
224 hex_and_ascii_print("\n\t", "Hello, World!\n", 14);
226 ascii_print("Hello, World!\n", 14);
228 #define TMSG "Now is the winter of our discontent...\n"
229 hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);
231 hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);