nexmon – Rev 1
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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.
*/
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#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(netdissect_options *ndo,
const u_char *cp, u_int length)
{
u_int caplength;
register u_char s;
caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
if (length > caplength)
length = caplength;
ND_PRINT((ndo, "\n"));
while (length > 0) {
s = *cp++;
length--;
if (s == '\r') {
/*
* Don't print CRs at the end of the line; they
* don't belong at the ends of lines on UN*X,
* and the standard I/O library will give us one
* on Windows so we don't need to print one
* ourselves.
*
* In the middle of a line, just print a '.'.
*/
if (length > 1 && *cp != '\n')
ND_PRINT((ndo, "."));
} else {
if (!ND_ISGRAPH(s) &&
(s != '\t' && s != ' ' && s != '\n'))
ND_PRINT((ndo, "."));
else
ND_PRINT((ndo, "%c", s));
}
}
}
void
hex_and_ascii_print_with_offset(netdissect_options *ndo, register const char *ident,
register const u_char *cp, register u_int length, register u_int oset)
{
u_int caplength;
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;
caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
if (length > caplength)
length = caplength;
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++) = (ND_ISGRAPH(s1) ? s1 : '.');
*(asp++) = (ND_ISGRAPH(s2) ? s2 : '.');
i++;
if (i >= HEXDUMP_SHORTS_PER_LINE) {
*hsp = *asp = '\0';
ND_PRINT((ndo, "%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++) = (ND_ISGRAPH(s1) ? s1 : '.');
++i;
}
if (i > 0) {
*hsp = *asp = '\0';
ND_PRINT((ndo, "%s0x%04x: %-*s %s",
ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
hexstuff, asciistuff));
}
}
void
hex_and_ascii_print(netdissect_options *ndo, register const char *ident,
register const u_char *cp, register u_int length)
{
hex_and_ascii_print_with_offset(ndo, ident, cp, length, 0);
}
/*
* telnet_print() wants this. It is essentially default_print_unaligned()
*/
void
hex_print_with_offset(netdissect_options *ndo,
const char *ident, const u_char *cp, u_int length,
u_int oset)
{
u_int caplength;
register u_int i, s;
register int nshorts;
caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
if (length > caplength)
length = caplength;
nshorts = (u_int) length / sizeof(u_short);
i = 0;
while (--nshorts >= 0) {
if ((i++ % 8) == 0) {
ND_PRINT((ndo,"%s0x%04x: ", ident, oset));
oset += HEXDUMP_BYTES_PER_LINE;
}
s = *cp++;
ND_PRINT((ndo," %02x%02x", s, *cp++));
}
if (length & 1) {
if ((i % 8) == 0)
ND_PRINT((ndo,"%s0x%04x: ", ident, oset));
ND_PRINT((ndo," %02x", *cp));
}
}
/*
* just for completeness
*/
void
hex_print(netdissect_options *ndo,const char *ident, const u_char *cp, u_int length)
{
hex_print_with_offset(ndo, 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 */