/*	$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 lintstatic 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)voidascii_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);	}}voidhex_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);	}}voidhex_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() */voidhex_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 */voidhex_print(register const char *ident, register const u_char *cp, register u_int length){	hex_print_with_offset(ident, cp, length, 0);}#ifdef MAINintmain(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 */