| /* $NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $ */ |
| |
| /*- |
| * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to The NetBSD Foundation |
| * by Alan Barrett and Simon J. Gerraty. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the NetBSD |
| * Foundation, Inc. and its contributors. |
| * 4. Neither the name of The NetBSD Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.17 2005-07-06 20:53:32 guy Exp $"; |
| #endif |
| #include <tcpdump-stdinc.h> |
| #include <stdio.h> |
| |
| #include "interface.h" |
| |
| #define ASCII_LINELENGTH 300 |
| #define HEXDUMP_BYTES_PER_LINE 16 |
| #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2) |
| #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */ |
| #define HEXDUMP_HEXSTUFF_PER_LINE \ |
| (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE) |
| |
| void |
| ascii_print(register const u_char *cp, register u_int length) |
| { |
| register int s; |
| |
| putchar('\n'); |
| while (length > 0) { |
| s = *cp++; |
| length--; |
| if (!isgraph(s) && |
| (s != '\t' && s != ' ' && s != '\n' && s != '\r')) |
| putchar('.'); |
| else |
| putchar(s); |
| } |
| } |
| |
| void |
| hex_and_ascii_print_with_offset(register const char *ident, |
| register const u_char *cp, register u_int length, register u_int oset) |
| { |
| register u_int i; |
| register int s1, s2; |
| register int nshorts; |
| char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp; |
| char asciistuff[ASCII_LINELENGTH+1], *asp; |
| |
| nshorts = length / sizeof(u_short); |
| i = 0; |
| hsp = hexstuff; asp = asciistuff; |
| while (--nshorts >= 0) { |
| s1 = *cp++; |
| s2 = *cp++; |
| (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), |
| " %02x%02x", s1, s2); |
| hsp += HEXDUMP_HEXSTUFF_PER_SHORT; |
| *(asp++) = (isgraph(s1) ? s1 : '.'); |
| *(asp++) = (isgraph(s2) ? s2 : '.'); |
| i++; |
| if (i >= HEXDUMP_SHORTS_PER_LINE) { |
| *hsp = *asp = '\0'; |
| (void)printf("%s0x%04x: %-*s %s", |
| ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, |
| hexstuff, asciistuff); |
| i = 0; hsp = hexstuff; asp = asciistuff; |
| oset += HEXDUMP_BYTES_PER_LINE; |
| } |
| } |
| if (length & 1) { |
| s1 = *cp++; |
| (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff), |
| " %02x", s1); |
| hsp += 3; |
| *(asp++) = (isgraph(s1) ? s1 : '.'); |
| ++i; |
| } |
| if (i > 0) { |
| *hsp = *asp = '\0'; |
| (void)printf("%s0x%04x: %-*s %s", |
| ident, oset, HEXDUMP_HEXSTUFF_PER_LINE, |
| hexstuff, asciistuff); |
| } |
| } |
| |
| void |
| hex_and_ascii_print(register const char *ident, register const u_char *cp, |
| register u_int length) |
| { |
| hex_and_ascii_print_with_offset(ident, cp, length, 0); |
| } |
| |
| /* |
| * telnet_print() wants this. It is essentially default_print_unaligned() |
| */ |
| void |
| hex_print_with_offset(register const char *ident, register const u_char *cp, register u_int length, |
| register u_int oset) |
| { |
| register u_int i, s; |
| register int nshorts; |
| |
| nshorts = (u_int) length / sizeof(u_short); |
| i = 0; |
| while (--nshorts >= 0) { |
| if ((i++ % 8) == 0) { |
| (void)printf("%s0x%04x: ", ident, oset); |
| oset += HEXDUMP_BYTES_PER_LINE; |
| } |
| s = *cp++; |
| (void)printf(" %02x%02x", s, *cp++); |
| } |
| if (length & 1) { |
| if ((i % 8) == 0) |
| (void)printf("%s0x%04x: ", ident, oset); |
| (void)printf(" %02x", *cp); |
| } |
| } |
| |
| /* |
| * just for completeness |
| */ |
| void |
| hex_print(register const char *ident, register const u_char *cp, register u_int length) |
| { |
| hex_print_with_offset(ident, cp, length, 0); |
| } |
| |
| #ifdef MAIN |
| int |
| main(int argc, char *argv[]) |
| { |
| hex_print("\n\t", "Hello, World!\n", 14); |
| printf("\n"); |
| hex_and_ascii_print("\n\t", "Hello, World!\n", 14); |
| printf("\n"); |
| ascii_print("Hello, World!\n", 14); |
| printf("\n"); |
| #define TMSG "Now is the winter of our discontent...\n" |
| hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); |
| printf("\n"); |
| hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100); |
| printf("\n"); |
| exit(0); |
| } |
| #endif /* MAIN */ |