/* $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[] = "@(#) $Header: /tcpdump/master/tcpdump/print-ascii.c,v 1.2.2.2 2000/01/11 06:58:23 fenner Exp $"; #endif #include #include #include #include "interface.h" #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 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[HEXDUMP_BYTES_PER_LINE+1], *asp; nshorts = length / sizeof(u_short); i = 0; hsp = hexstuff; asp = asciistuff; while (--nshorts >= 0) { s1 = *cp++; s2 = *cp++; (void)sprintf(hsp, " %02x%02x", s1, s2); hsp += HEXDUMP_HEXSTUFF_PER_SHORT; *(asp++) = (isgraph(s1) ? s1 : '.'); *(asp++) = (isgraph(s2) ? s2 : '.'); if (++i >= HEXDUMP_SHORTS_PER_LINE) { *hsp = *asp = '\0'; (void)printf("\n0x%04x\t%-*s\t%s", oset, HEXDUMP_HEXSTUFF_PER_LINE, hexstuff, asciistuff); i = 0; hsp = hexstuff; asp = asciistuff; oset += HEXDUMP_BYTES_PER_LINE; } } if (length & 1) { s1 = *cp++; (void)sprintf(hsp, " %02x", s1); hsp += 3; *(asp++) = (isgraph(s1) ? s1 : '.'); ++i; } if (i > 0) { *hsp = *asp = '\0'; (void)printf("\n0x%04x\t%-*s\t%s", oset, HEXDUMP_HEXSTUFF_PER_LINE, hexstuff, asciistuff); } } void ascii_print(register const u_char *cp, register u_int length) { ascii_print_with_offset(cp, length, 0); } /* * telnet_print() wants this. It is essentially default_print_unaligned() */ void hex_print_with_offset(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("\n0x%04x\t", oset); oset += HEXDUMP_BYTES_PER_LINE; } s = *cp++; (void)printf(" %02x%02x", s, *cp++); } if (length & 1) { if ((i % 8) == 0) (void)printf("\n0x%04x\t", oset); (void)printf(" %02x", *cp); } } /* * just for completeness */ void hex_print(register const u_char *cp, register u_int length) { hex_print_with_offset(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 */