1 /* $NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Alan Barrett and Simon J. Gerraty. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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. 25 * 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. 37 */ 38 39 #ifdef HAVE_CONFIG_H 40 #include "config.h" 41 #endif 42 43 #ifndef lint 44 static const char rcsid[] _U_ = 45 "@(#) $Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.17 2005-07-06 20:53:32 guy Exp $"; 46 #endif 47 #include <tcpdump-stdinc.h> 48 #include <stdio.h> 49 50 #include "interface.h" 51 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) 58 59 void 60 ascii_print(register const u_char *cp, register u_int length) 61 { 62 register int s; 63 64 putchar('\n'); 65 while (length > 0) { 66 s = *cp++; 67 length--; 68 if (!isgraph(s) && 69 (s != '\t' && s != ' ' && s != '\n' && s != '\r')) 70 putchar('.'); 71 else 72 putchar(s); 73 } 74 } 75 76 void 77 hex_and_ascii_print_with_offset(register const char *ident, 78 register const u_char *cp, register u_int length, register u_int oset) 79 { 80 register u_int i; 81 register int s1, s2; 82 register int nshorts; 83 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp; 84 char asciistuff[ASCII_LINELENGTH+1], *asp; 85 86 nshorts = length / sizeof(u_short); 87 i = 0; 88 hsp = hexstuff; asp = asciistuff; 89 while (--nshorts >= 0) { 90 s1 = *cp++; 91 s2 = *cp++; 92 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 93 " %02x%02x", s1, s2); 94 hsp += HEXDUMP_HEXSTUFF_PER_SHORT; 95 *(asp++) = (isgraph(s1) ? s1 : '.'); 96 *(asp++) = (isgraph(s2) ? s2 : '.'); 97 i++; 98 if (i >= HEXDUMP_SHORTS_PER_LINE) { 99 *hsp = *asp = '\0'; 100 (void)printf("%s0x%04x: %-*s %s", 101 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 102 hexstuff, asciistuff); 103 i = 0; hsp = hexstuff; asp = asciistuff; 104 oset += HEXDUMP_BYTES_PER_LINE; 105 } 106 } 107 if (length & 1) { 108 s1 = *cp++; 109 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 110 " %02x", s1); 111 hsp += 3; 112 *(asp++) = (isgraph(s1) ? s1 : '.'); 113 ++i; 114 } 115 if (i > 0) { 116 *hsp = *asp = '\0'; 117 (void)printf("%s0x%04x: %-*s %s", 118 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 119 hexstuff, asciistuff); 120 } 121 } 122 123 void 124 hex_and_ascii_print(register const char *ident, register const u_char *cp, 125 register u_int length) 126 { 127 hex_and_ascii_print_with_offset(ident, cp, length, 0); 128 } 129 130 /* 131 * telnet_print() wants this. It is essentially default_print_unaligned() 132 */ 133 void 134 hex_print_with_offset(register const char *ident, register const u_char *cp, register u_int length, 135 register u_int oset) 136 { 137 register u_int i, s; 138 register int nshorts; 139 140 nshorts = (u_int) length / sizeof(u_short); 141 i = 0; 142 while (--nshorts >= 0) { 143 if ((i++ % 8) == 0) { 144 (void)printf("%s0x%04x: ", ident, oset); 145 oset += HEXDUMP_BYTES_PER_LINE; 146 } 147 s = *cp++; 148 (void)printf(" %02x%02x", s, *cp++); 149 } 150 if (length & 1) { 151 if ((i % 8) == 0) 152 (void)printf("%s0x%04x: ", ident, oset); 153 (void)printf(" %02x", *cp); 154 } 155 } 156 157 /* 158 * just for completeness 159 */ 160 void 161 hex_print(register const char *ident, register const u_char *cp, register u_int length) 162 { 163 hex_print_with_offset(ident, cp, length, 0); 164 } 165 166 #ifdef MAIN 167 int 168 main(int argc, char *argv[]) 169 { 170 hex_print("\n\t", "Hello, World!\n", 14); 171 printf("\n"); 172 hex_and_ascii_print("\n\t", "Hello, World!\n", 14); 173 printf("\n"); 174 ascii_print("Hello, World!\n", 14); 175 printf("\n"); 176 #define TMSG "Now is the winter of our discontent...\n" 177 hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 178 printf("\n"); 179 hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 180 printf("\n"); 181 exit(0); 182 } 183 #endif /* MAIN */ 184