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 (s == '\r') { 69 /* 70 * Don't print CRs at the end of the line; they 71 * don't belong at the ends of lines on UN*X, 72 * and the standard I/O library will give us one 73 * on Windows so we don't need to print one 74 * ourselves. 75 * 76 * In the middle of a line, just print a '.'. 77 */ 78 if (length > 1 && *cp != '\n') 79 putchar('.'); 80 } else { 81 if (!ND_ISGRAPH(s) && 82 (s != '\t' && s != ' ' && s != '\n')) 83 putchar('.'); 84 else 85 putchar(s); 86 } 87 } 88 } 89 90 void 91 hex_and_ascii_print_with_offset(register const char *ident, 92 register const u_char *cp, register u_int length, register u_int oset) 93 { 94 register u_int i; 95 register int s1, s2; 96 register int nshorts; 97 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp; 98 char asciistuff[ASCII_LINELENGTH+1], *asp; 99 100 nshorts = length / sizeof(u_short); 101 i = 0; 102 hsp = hexstuff; asp = asciistuff; 103 while (--nshorts >= 0) { 104 s1 = *cp++; 105 s2 = *cp++; 106 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 107 " %02x%02x", s1, s2); 108 hsp += HEXDUMP_HEXSTUFF_PER_SHORT; 109 *(asp++) = (ND_ISGRAPH(s1) ? s1 : '.'); 110 *(asp++) = (ND_ISGRAPH(s2) ? s2 : '.'); 111 i++; 112 if (i >= HEXDUMP_SHORTS_PER_LINE) { 113 *hsp = *asp = '\0'; 114 (void)printf("%s0x%04x: %-*s %s", 115 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 116 hexstuff, asciistuff); 117 i = 0; hsp = hexstuff; asp = asciistuff; 118 oset += HEXDUMP_BYTES_PER_LINE; 119 } 120 } 121 if (length & 1) { 122 s1 = *cp++; 123 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 124 " %02x", s1); 125 hsp += 3; 126 *(asp++) = (ND_ISGRAPH(s1) ? s1 : '.'); 127 ++i; 128 } 129 if (i > 0) { 130 *hsp = *asp = '\0'; 131 (void)printf("%s0x%04x: %-*s %s", 132 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 133 hexstuff, asciistuff); 134 } 135 } 136 137 void 138 hex_and_ascii_print(register const char *ident, register const u_char *cp, 139 register u_int length) 140 { 141 hex_and_ascii_print_with_offset(ident, cp, length, 0); 142 } 143 144 /* 145 * telnet_print() wants this. It is essentially default_print_unaligned() 146 */ 147 void 148 hex_print_with_offset(register const char *ident, register const u_char *cp, register u_int length, 149 register u_int oset) 150 { 151 register u_int i, s; 152 register int nshorts; 153 154 nshorts = (u_int) length / sizeof(u_short); 155 i = 0; 156 while (--nshorts >= 0) { 157 if ((i++ % 8) == 0) { 158 (void)printf("%s0x%04x: ", ident, oset); 159 oset += HEXDUMP_BYTES_PER_LINE; 160 } 161 s = *cp++; 162 (void)printf(" %02x%02x", s, *cp++); 163 } 164 if (length & 1) { 165 if ((i % 8) == 0) 166 (void)printf("%s0x%04x: ", ident, oset); 167 (void)printf(" %02x", *cp); 168 } 169 } 170 171 /* 172 * just for completeness 173 */ 174 void 175 hex_print(register const char *ident, register const u_char *cp, register u_int length) 176 { 177 hex_print_with_offset(ident, cp, length, 0); 178 } 179 180 #ifdef MAIN 181 int 182 main(int argc, char *argv[]) 183 { 184 hex_print("\n\t", "Hello, World!\n", 14); 185 printf("\n"); 186 hex_and_ascii_print("\n\t", "Hello, World!\n", 14); 187 printf("\n"); 188 ascii_print("Hello, World!\n", 14); 189 printf("\n"); 190 #define TMSG "Now is the winter of our discontent...\n" 191 hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 192 printf("\n"); 193 hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 194 printf("\n"); 195 exit(0); 196 } 197 #endif /* MAIN */ 198
