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 #define NETDISSECT_REWORKED 40 #ifdef HAVE_CONFIG_H 41 #include "config.h" 42 #endif 43 44 #include <tcpdump-stdinc.h> 45 #include <stdio.h> 46 47 #include "interface.h" 48 49 #define ASCII_LINELENGTH 300 50 #define HEXDUMP_BYTES_PER_LINE 16 51 #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2) 52 #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */ 53 #define HEXDUMP_HEXSTUFF_PER_LINE \ 54 (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE) 55 56 void 57 ascii_print(netdissect_options *ndo, 58 const u_char *cp, u_int length) 59 { 60 u_int caplength; 61 register u_char s; 62 63 caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0; 64 if (length > caplength) 65 length = caplength; 66 ND_PRINT((ndo, "\n")); 67 while (length > 0) { 68 s = *cp++; 69 length--; 70 if (s == '\r') { 71 /* 72 * Don't print CRs at the end of the line; they 73 * don't belong at the ends of lines on UN*X, 74 * and the standard I/O library will give us one 75 * on Windows so we don't need to print one 76 * ourselves. 77 * 78 * In the middle of a line, just print a '.'. 79 */ 80 if (length > 1 && *cp != '\n') 81 ND_PRINT((ndo, ".")); 82 } else { 83 if (!ND_ISGRAPH(s) && 84 (s != '\t' && s != ' ' && s != '\n')) 85 ND_PRINT((ndo, ".")); 86 else 87 ND_PRINT((ndo, "%c", s)); 88 } 89 } 90 } 91 92 void 93 hex_and_ascii_print_with_offset(netdissect_options *ndo, register const char *ident, 94 register const u_char *cp, register u_int length, register u_int oset) 95 { 96 u_int caplength; 97 register u_int i; 98 register int s1, s2; 99 register int nshorts; 100 char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp; 101 char asciistuff[ASCII_LINELENGTH+1], *asp; 102 103 caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0; 104 if (length > caplength) 105 length = caplength; 106 nshorts = length / sizeof(u_short); 107 i = 0; 108 hsp = hexstuff; asp = asciistuff; 109 while (--nshorts >= 0) { 110 s1 = *cp++; 111 s2 = *cp++; 112 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 113 " %02x%02x", s1, s2); 114 hsp += HEXDUMP_HEXSTUFF_PER_SHORT; 115 *(asp++) = (ND_ISGRAPH(s1) ? s1 : '.'); 116 *(asp++) = (ND_ISGRAPH(s2) ? s2 : '.'); 117 i++; 118 if (i >= HEXDUMP_SHORTS_PER_LINE) { 119 *hsp = *asp = '\0'; 120 ND_PRINT((ndo, "%s0x%04x: %-*s %s", 121 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 122 hexstuff, asciistuff)); 123 i = 0; hsp = hexstuff; asp = asciistuff; 124 oset += HEXDUMP_BYTES_PER_LINE; 125 } 126 } 127 if (length & 1) { 128 s1 = *cp++; 129 (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), 130 " %02x", s1); 131 hsp += 3; 132 *(asp++) = (ND_ISGRAPH(s1) ? s1 : '.'); 133 ++i; 134 } 135 if (i > 0) { 136 *hsp = *asp = '\0'; 137 ND_PRINT((ndo, "%s0x%04x: %-*s %s", 138 ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, 139 hexstuff, asciistuff)); 140 } 141 } 142 143 void 144 hex_and_ascii_print(netdissect_options *ndo, register const char *ident, 145 register const u_char *cp, register u_int length) 146 { 147 hex_and_ascii_print_with_offset(ndo, ident, cp, length, 0); 148 } 149 150 /* 151 * telnet_print() wants this. It is essentially default_print_unaligned() 152 */ 153 void 154 hex_print_with_offset(netdissect_options *ndo, 155 const char *ident, const u_char *cp, u_int length, 156 u_int oset) 157 { 158 u_int caplength; 159 register u_int i, s; 160 register int nshorts; 161 162 caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0; 163 if (length > caplength) 164 length = caplength; 165 nshorts = (u_int) length / sizeof(u_short); 166 i = 0; 167 while (--nshorts >= 0) { 168 if ((i++ % 8) == 0) { 169 ND_PRINT((ndo,"%s0x%04x: ", ident, oset)); 170 oset += HEXDUMP_BYTES_PER_LINE; 171 } 172 s = *cp++; 173 ND_PRINT((ndo," %02x%02x", s, *cp++)); 174 } 175 if (length & 1) { 176 if ((i % 8) == 0) 177 ND_PRINT((ndo,"%s0x%04x: ", ident, oset)); 178 ND_PRINT((ndo," %02x", *cp)); 179 } 180 } 181 182 /* 183 * just for completeness 184 */ 185 void 186 hex_print(netdissect_options *ndo,const char *ident, const u_char *cp, u_int length) 187 { 188 hex_print_with_offset(ndo, ident, cp, length, 0); 189 } 190 191 #ifdef MAIN 192 int 193 main(int argc, char *argv[]) 194 { 195 hex_print("\n\t", "Hello, World!\n", 14); 196 printf("\n"); 197 hex_and_ascii_print("\n\t", "Hello, World!\n", 14); 198 printf("\n"); 199 ascii_print("Hello, World!\n", 14); 200 printf("\n"); 201 #define TMSG "Now is the winter of our discontent...\n" 202 hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 203 printf("\n"); 204 hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); 205 printf("\n"); 206 exit(0); 207 } 208 #endif /* MAIN */ 209
