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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static const char rcsid[] _U_ = 40 "@(#) Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.17 2005-07-06 20:53:32 guy Exp"; 41 #else 42 __RCSID("$NetBSD: print-ascii.c,v 1.2 2010/12/05 05:11:30 christos Exp $"); 43 #endif 44 #endif 45 #include <tcpdump-stdinc.h> 46 #include <stdio.h> 47 48 #include "interface.h" 49 50 #define ASCII_LINELENGTH 300 51 #define HEXDUMP_BYTES_PER_LINE 16 52 #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2) 53 #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */ 54 #define HEXDUMP_HEXSTUFF_PER_LINE \ 55 (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE) 56 57 void 58 ascii_print(register const u_char *cp, register u_int length) 59 { 60 register int s; 61 62 putchar('\n'); 63 while (length > 0) { 64 s = *cp++; 65 length--; 66 if (!isgraph(s) && 67 (s != '\t' && s != ' ' && s != '\n' && s != '\r')) 68 putchar('.'); 69 else 70 putchar(s); 71 } 72 } 73 74 void 75 hex_and_ascii_print_with_offset(register const char *ident, 76 register const u_char *cp, register u_int length, register u_int oset) 77 { 78 register u_int i; 79 register int s1, s2; 80 register int nshorts; 81 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp; 82 char asciistuff[ASCII_LINELENGTH+1], *asp; 83 84 nshorts = length / sizeof(u_short); 85 i = 0; 86 hsp = hexstuff; asp = asciistuff; 87 while (--nshorts >= 0) { 88 s1 = *cp++; 89 s2 = *cp++; 90 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 91 " %02x%02x", s1, s2); 92 hsp += HEXDUMP_HEXSTUFF_PER_SHORT; 93 *(asp++) = (isgraph(s1) ? s1 : '.'); 94 *(asp++) = (isgraph(s2) ? s2 : '.'); 95 i++; 96 if (i >= HEXDUMP_SHORTS_PER_LINE) { 97 *hsp = *asp = '\0'; 98 (void)printf("%s0x%04x: %-*s %s", 99 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 100 hexstuff, asciistuff); 101 i = 0; hsp = hexstuff; asp = asciistuff; 102 oset += HEXDUMP_BYTES_PER_LINE; 103 } 104 } 105 if (length & 1) { 106 s1 = *cp++; 107 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 108 " %02x", s1); 109 hsp += 3; 110 *(asp++) = (isgraph(s1) ? s1 : '.'); 111 ++i; 112 } 113 if (i > 0) { 114 *hsp = *asp = '\0'; 115 (void)printf("%s0x%04x: %-*s %s", 116 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 117 hexstuff, asciistuff); 118 } 119 } 120 121 void 122 hex_and_ascii_print(register const char *ident, register const u_char *cp, 123 register u_int length) 124 { 125 hex_and_ascii_print_with_offset(ident, cp, length, 0); 126 } 127 128 /* 129 * telnet_print() wants this. It is essentially default_print_unaligned() 130 */ 131 void 132 hex_print_with_offset(register const char *ident, register const u_char *cp, register u_int length, 133 register u_int oset) 134 { 135 register u_int i, s; 136 register int nshorts; 137 138 nshorts = (u_int) length / sizeof(u_short); 139 i = 0; 140 while (--nshorts >= 0) { 141 if ((i++ % 8) == 0) { 142 (void)printf("%s0x%04x: ", ident, oset); 143 oset += HEXDUMP_BYTES_PER_LINE; 144 } 145 s = *cp++; 146 (void)printf(" %02x%02x", s, *cp++); 147 } 148 if (length & 1) { 149 if ((i % 8) == 0) 150 (void)printf("%s0x%04x: ", ident, oset); 151 (void)printf(" %02x", *cp); 152 } 153 } 154 155 /* 156 * just for completeness 157 */ 158 void 159 hex_print(register const char *ident, register const u_char *cp, register u_int length) 160 { 161 hex_print_with_offset(ident, cp, length, 0); 162 } 163 164 #ifdef MAIN 165 int 166 main(int argc, char *argv[]) 167 { 168 hex_print("\n\t", "Hello, World!\n", 14); 169 printf("\n"); 170 hex_and_ascii_print("\n\t", "Hello, World!\n", 14); 171 printf("\n"); 172 ascii_print("Hello, World!\n", 14); 173 printf("\n"); 174 #define TMSG "Now is the winter of our discontent...\n" 175 hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 176 printf("\n"); 177 hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 178 printf("\n"); 179 exit(0); 180 } 181 #endif /* MAIN */ 182