print-ascii.c revision 127668
161640Speter/* $NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $ */ 261640Speter 3201813Sbz/*- 4201813Sbz * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 5111582Sru * 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 44static 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 $"; 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 59void 60ascii_print_with_offset(register const u_char *ident, register const u_char *cp, register u_int length, 61 register u_int oset) 62{ 63 register u_int i; 64 register int s1, s2; 65 register int nshorts; 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); 69 70 nshorts = length / sizeof(u_short); 71 i = 0; 72 hsp = hexstuff; asp = asciistuff; 73 if (Aflag) *(asp++) = '\n'; 74 while (--nshorts >= 0) { 75 s1 = *cp++; 76 s2 = *cp++; 77 if (Aflag) { 78 i += 2; 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; 82 83 } else { 84 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 85 " %02x%02x", s1, s2); 86 hsp += HEXDUMP_HEXSTUFF_PER_SHORT; 87 *(asp++) = (isgraph(s1) ? s1 : '.'); 88 *(asp++) = (isgraph(s2) ? s2 : '.'); 89 i++; 90 } 91 if (i >= maxlength) { 92 *hsp = *asp = '\0'; 93 if (Aflag) { 94 (void)printf("%s", asciistuff); 95 } else { 96 (void)printf("%s0x%04x: %-*s %s", 97 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 98 hexstuff, asciistuff); 99 } 100 i = 0; hsp = hexstuff; asp = asciistuff; 101 oset += HEXDUMP_BYTES_PER_LINE; 102 } 103 } 104 if (length & 1) { 105 s1 = *cp++; 106 if (Aflag) { 107 *(asp++) = (isgraph(s1) ? s1 : (s1 != '\t' && s1 != ' ' && s1 != '\n' && s1 != '\r' ? '.' : s1) ); 108 } else { 109 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 110 " %02x", s1); 111 hsp += 3; 112 *(asp++) = (isgraph(s1) ? s1 : '.'); 113 } 114 ++i; 115 } 116 if (i > 0) { 117 *hsp = *asp = '\0'; 118 if (Aflag) { 119 (void)printf("%s%s", ident, asciistuff); 120 } else { 121 (void)printf("%s0x%04x: %-*s %s", 122 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 123 hexstuff, asciistuff); 124 } 125 } 126} 127 128void 129ascii_print(register const u_char *ident, register const u_char *cp, register u_int length) 130{ 131 ascii_print_with_offset(ident, cp, length, 0); 132} 133 134/* 135 * telnet_print() wants this. It is essentially default_print_unaligned() 136 */ 137void 138hex_print_with_offset(register const u_char *ident, register const u_char *cp, register u_int length, 139 register u_int oset) 140{ 141 register u_int i, s; 142 register int nshorts; 143 144 nshorts = (u_int) length / sizeof(u_short); 145 i = 0; 146 while (--nshorts >= 0) { 147 if ((i++ % 8) == 0) { 148 (void)printf("%s0x%04x: ", ident, oset); 149 oset += HEXDUMP_BYTES_PER_LINE; 150 } 151 s = *cp++; 152 (void)printf(" %02x%02x", s, *cp++); 153 } 154 if (length & 1) { 155 if ((i % 8) == 0) 156 (void)printf("%s0x%04x: ", ident, oset); 157 (void)printf(" %02x", *cp); 158 } 159} 160 161/* 162 * just for completeness 163 */ 164void 165hex_print(register const u_char *ident, register const u_char *cp, register u_int length) 166{ 167 hex_print_with_offset(ident, cp, length, 0); 168} 169 170#ifdef MAIN 171int 172main(int argc, char *argv[]) 173{ 174 hex_print("Hello, World!\n", 14); 175 printf("\n"); 176 ascii_print("Hello, World!\n", 14); 177 printf("\n"); 178#define TMSG "Now is the winter of our discontent...\n" 179 ascii_print_with_offset(TMSG, sizeof(TMSG) - 1, 0x100); 180 printf("\n"); 181 exit(0); 182} 183#endif /* MAIN */ 184 185 186