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/* $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 1.16 2004/07/21 22:00:10 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_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;
u_int maxlength = (Aflag ? ASCII_LINELENGTH : HEXDUMP_SHORTS_PER_LINE);
nshorts = length / sizeof(u_short);
i = 0;
hsp = hexstuff; asp = asciistuff;
if (Aflag) *(asp++) = '\n';
while (--nshorts >= 0) {
s1 = *cp++;
s2 = *cp++;
if (Aflag) {
i += 2;
*(asp++) = (isgraph(s1) ? s1 : (s1 != '\t' && s1 != ' ' && s1 != '\n' && s1 != '\r' ? '.' : s1) );
*(asp++) = (isgraph(s2) ? s2 : (s2 != '\t' && s2 != ' ' && s2 != '\n' && s2 != '\r' ? '.' : s2) );
if (s1 == '\n' || s2 == '\n') i = maxlength;
} else {
(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 >= maxlength) {
*hsp = *asp = '\0';
if (Aflag) {
(void)printf("%s", asciistuff);
} else {
(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++;
if (Aflag) {
*(asp++) = (isgraph(s1) ? s1 : (s1 != '\t' && s1 != ' ' && s1 != '\n' && s1 != '\r' ? '.' : s1) );
} else {
(void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
" %02x", s1);
hsp += 3;
*(asp++) = (isgraph(s1) ? s1 : '.');
}
++i;
}
if (i > 0) {
*hsp = *asp = '\0';
if (Aflag) {
(void)printf("%s%s", ident, asciistuff);
} else {
(void)printf("%s0x%04x: %-*s %s",
ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
hexstuff, asciistuff);
}
}
}
void
ascii_print(register const char *ident, register const u_char *cp, register u_int length)
{
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("Hello, World!\n", 14);
printf("\n");
ascii_print("Hello, World!\n", 14);
printf("\n");
#define TMSG "Now is the winter of our discontent...\n"
ascii_print_with_offset(TMSG, sizeof(TMSG) - 1, 0x100);
printf("\n");
exit(0);
}
#endif /* MAIN */
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