1*05b00f60SXin Li /* $NetBSD: print-ascii.c,v 1.1 1999/09/30 14:49:12 sjg Exp $ */
2*05b00f60SXin Li
3*05b00f60SXin Li /*-
4*05b00f60SXin Li * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
5*05b00f60SXin Li * All rights reserved.
6*05b00f60SXin Li *
7*05b00f60SXin Li * This code is derived from software contributed to The NetBSD Foundation
8*05b00f60SXin Li * by Alan Barrett and Simon J. Gerraty.
9*05b00f60SXin Li *
10*05b00f60SXin Li * Redistribution and use in source and binary forms, with or without
11*05b00f60SXin Li * modification, are permitted provided that the following conditions
12*05b00f60SXin Li * are met:
13*05b00f60SXin Li * 1. Redistributions of source code must retain the above copyright
14*05b00f60SXin Li * notice, this list of conditions and the following disclaimer.
15*05b00f60SXin Li * 2. Redistributions in binary form must reproduce the above copyright
16*05b00f60SXin Li * notice, this list of conditions and the following disclaimer in the
17*05b00f60SXin Li * documentation and/or other materials provided with the distribution.
18*05b00f60SXin Li * 3. All advertising materials mentioning features or use of this software
19*05b00f60SXin Li * must display the following acknowledgement:
20*05b00f60SXin Li * This product includes software developed by the NetBSD
21*05b00f60SXin Li * Foundation, Inc. and its contributors.
22*05b00f60SXin Li * 4. Neither the name of The NetBSD Foundation nor the names of its
23*05b00f60SXin Li * contributors may be used to endorse or promote products derived
24*05b00f60SXin Li * from this software without specific prior written permission.
25*05b00f60SXin Li *
26*05b00f60SXin Li * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27*05b00f60SXin Li * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28*05b00f60SXin Li * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29*05b00f60SXin Li * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30*05b00f60SXin Li * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31*05b00f60SXin Li * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32*05b00f60SXin Li * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33*05b00f60SXin Li * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34*05b00f60SXin Li * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35*05b00f60SXin Li * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36*05b00f60SXin Li * POSSIBILITY OF SUCH DAMAGE.
37*05b00f60SXin Li */
38*05b00f60SXin Li
39*05b00f60SXin Li /* \summary: ASCII packet dump printer */
40*05b00f60SXin Li
41*05b00f60SXin Li #ifdef HAVE_CONFIG_H
42*05b00f60SXin Li #include <config.h>
43*05b00f60SXin Li #endif
44*05b00f60SXin Li
45*05b00f60SXin Li #include "netdissect-stdinc.h"
46*05b00f60SXin Li
47*05b00f60SXin Li #include <stdio.h>
48*05b00f60SXin Li
49*05b00f60SXin Li #include "netdissect-ctype.h"
50*05b00f60SXin Li
51*05b00f60SXin Li #include "netdissect.h"
52*05b00f60SXin Li #include "extract.h"
53*05b00f60SXin Li
54*05b00f60SXin Li #define ASCII_LINELENGTH 300
55*05b00f60SXin Li #define HEXDUMP_BYTES_PER_LINE 16
56*05b00f60SXin Li #define HEXDUMP_SHORTS_PER_LINE (HEXDUMP_BYTES_PER_LINE / 2)
57*05b00f60SXin Li #define HEXDUMP_HEXSTUFF_PER_SHORT 5 /* 4 hex digits and a space */
58*05b00f60SXin Li #define HEXDUMP_HEXSTUFF_PER_LINE \
59*05b00f60SXin Li (HEXDUMP_HEXSTUFF_PER_SHORT * HEXDUMP_SHORTS_PER_LINE)
60*05b00f60SXin Li
61*05b00f60SXin Li void
ascii_print(netdissect_options * ndo,const u_char * cp,u_int length)62*05b00f60SXin Li ascii_print(netdissect_options *ndo,
63*05b00f60SXin Li const u_char *cp, u_int length)
64*05b00f60SXin Li {
65*05b00f60SXin Li u_int caplength;
66*05b00f60SXin Li u_char s;
67*05b00f60SXin Li int truncated = FALSE;
68*05b00f60SXin Li
69*05b00f60SXin Li ndo->ndo_protocol = "ascii";
70*05b00f60SXin Li caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
71*05b00f60SXin Li if (length > caplength) {
72*05b00f60SXin Li length = caplength;
73*05b00f60SXin Li truncated = TRUE;
74*05b00f60SXin Li }
75*05b00f60SXin Li ND_PRINT("\n");
76*05b00f60SXin Li while (length > 0) {
77*05b00f60SXin Li s = GET_U_1(cp);
78*05b00f60SXin Li cp++;
79*05b00f60SXin Li length--;
80*05b00f60SXin Li if (s == '\r') {
81*05b00f60SXin Li /*
82*05b00f60SXin Li * Don't print CRs at the end of the line; they
83*05b00f60SXin Li * don't belong at the ends of lines on UN*X,
84*05b00f60SXin Li * and the standard I/O library will give us one
85*05b00f60SXin Li * on Windows so we don't need to print one
86*05b00f60SXin Li * ourselves.
87*05b00f60SXin Li *
88*05b00f60SXin Li * In the middle of a line, just print a '.'.
89*05b00f60SXin Li */
90*05b00f60SXin Li if (length > 1 && GET_U_1(cp) != '\n')
91*05b00f60SXin Li ND_PRINT(".");
92*05b00f60SXin Li } else {
93*05b00f60SXin Li if (!ND_ASCII_ISGRAPH(s) &&
94*05b00f60SXin Li (s != '\t' && s != ' ' && s != '\n'))
95*05b00f60SXin Li ND_PRINT(".");
96*05b00f60SXin Li else
97*05b00f60SXin Li ND_PRINT("%c", s);
98*05b00f60SXin Li }
99*05b00f60SXin Li }
100*05b00f60SXin Li if (truncated)
101*05b00f60SXin Li nd_trunc_longjmp(ndo);
102*05b00f60SXin Li }
103*05b00f60SXin Li
104*05b00f60SXin Li static void
hex_and_ascii_print_with_offset(netdissect_options * ndo,const char * ident,const u_char * cp,u_int length,u_int oset)105*05b00f60SXin Li hex_and_ascii_print_with_offset(netdissect_options *ndo, const char *ident,
106*05b00f60SXin Li const u_char *cp, u_int length, u_int oset)
107*05b00f60SXin Li {
108*05b00f60SXin Li u_int caplength;
109*05b00f60SXin Li u_int i;
110*05b00f60SXin Li u_int s1, s2;
111*05b00f60SXin Li u_int nshorts;
112*05b00f60SXin Li int truncated = FALSE;
113*05b00f60SXin Li char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp;
114*05b00f60SXin Li char asciistuff[ASCII_LINELENGTH+1], *asp;
115*05b00f60SXin Li
116*05b00f60SXin Li caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
117*05b00f60SXin Li if (length > caplength) {
118*05b00f60SXin Li length = caplength;
119*05b00f60SXin Li truncated = TRUE;
120*05b00f60SXin Li }
121*05b00f60SXin Li nshorts = length / sizeof(u_short);
122*05b00f60SXin Li i = 0;
123*05b00f60SXin Li hsp = hexstuff; asp = asciistuff;
124*05b00f60SXin Li while (nshorts != 0) {
125*05b00f60SXin Li s1 = GET_U_1(cp);
126*05b00f60SXin Li cp++;
127*05b00f60SXin Li s2 = GET_U_1(cp);
128*05b00f60SXin Li cp++;
129*05b00f60SXin Li (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
130*05b00f60SXin Li " %02x%02x", s1, s2);
131*05b00f60SXin Li hsp += HEXDUMP_HEXSTUFF_PER_SHORT;
132*05b00f60SXin Li *(asp++) = (char)(ND_ASCII_ISGRAPH(s1) ? s1 : '.');
133*05b00f60SXin Li *(asp++) = (char)(ND_ASCII_ISGRAPH(s2) ? s2 : '.');
134*05b00f60SXin Li i++;
135*05b00f60SXin Li if (i >= HEXDUMP_SHORTS_PER_LINE) {
136*05b00f60SXin Li *hsp = *asp = '\0';
137*05b00f60SXin Li ND_PRINT("%s0x%04x: %-*s %s",
138*05b00f60SXin Li ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
139*05b00f60SXin Li hexstuff, asciistuff);
140*05b00f60SXin Li i = 0; hsp = hexstuff; asp = asciistuff;
141*05b00f60SXin Li oset += HEXDUMP_BYTES_PER_LINE;
142*05b00f60SXin Li }
143*05b00f60SXin Li nshorts--;
144*05b00f60SXin Li }
145*05b00f60SXin Li if (length & 1) {
146*05b00f60SXin Li s1 = GET_U_1(cp);
147*05b00f60SXin Li cp++;
148*05b00f60SXin Li (void)snprintf(hsp, sizeof(hexstuff) - (hsp - hexstuff),
149*05b00f60SXin Li " %02x", s1);
150*05b00f60SXin Li hsp += 3;
151*05b00f60SXin Li *(asp++) = (char)(ND_ASCII_ISGRAPH(s1) ? s1 : '.');
152*05b00f60SXin Li ++i;
153*05b00f60SXin Li }
154*05b00f60SXin Li if (i > 0) {
155*05b00f60SXin Li *hsp = *asp = '\0';
156*05b00f60SXin Li ND_PRINT("%s0x%04x: %-*s %s",
157*05b00f60SXin Li ident, oset, HEXDUMP_HEXSTUFF_PER_LINE,
158*05b00f60SXin Li hexstuff, asciistuff);
159*05b00f60SXin Li }
160*05b00f60SXin Li if (truncated)
161*05b00f60SXin Li nd_trunc_longjmp(ndo);
162*05b00f60SXin Li }
163*05b00f60SXin Li
164*05b00f60SXin Li void
hex_and_ascii_print(netdissect_options * ndo,const char * ident,const u_char * cp,u_int length)165*05b00f60SXin Li hex_and_ascii_print(netdissect_options *ndo, const char *ident,
166*05b00f60SXin Li const u_char *cp, u_int length)
167*05b00f60SXin Li {
168*05b00f60SXin Li hex_and_ascii_print_with_offset(ndo, ident, cp, length, 0);
169*05b00f60SXin Li }
170*05b00f60SXin Li
171*05b00f60SXin Li /*
172*05b00f60SXin Li * telnet_print() wants this. It is essentially default_print_unaligned()
173*05b00f60SXin Li */
174*05b00f60SXin Li void
hex_print_with_offset(netdissect_options * ndo,const char * ident,const u_char * cp,u_int length,u_int oset)175*05b00f60SXin Li hex_print_with_offset(netdissect_options *ndo,
176*05b00f60SXin Li const char *ident, const u_char *cp, u_int length,
177*05b00f60SXin Li u_int oset)
178*05b00f60SXin Li {
179*05b00f60SXin Li u_int caplength;
180*05b00f60SXin Li u_int i, s;
181*05b00f60SXin Li u_int nshorts;
182*05b00f60SXin Li int truncated = FALSE;
183*05b00f60SXin Li
184*05b00f60SXin Li caplength = (ndo->ndo_snapend > cp) ? ND_BYTES_AVAILABLE_AFTER(cp) : 0;
185*05b00f60SXin Li if (length > caplength) {
186*05b00f60SXin Li length = caplength;
187*05b00f60SXin Li truncated = TRUE;
188*05b00f60SXin Li }
189*05b00f60SXin Li nshorts = length / sizeof(u_short);
190*05b00f60SXin Li i = 0;
191*05b00f60SXin Li while (nshorts != 0) {
192*05b00f60SXin Li if ((i++ % 8) == 0) {
193*05b00f60SXin Li ND_PRINT("%s0x%04x: ", ident, oset);
194*05b00f60SXin Li oset += HEXDUMP_BYTES_PER_LINE;
195*05b00f60SXin Li }
196*05b00f60SXin Li s = GET_U_1(cp);
197*05b00f60SXin Li cp++;
198*05b00f60SXin Li ND_PRINT(" %02x%02x", s, GET_U_1(cp));
199*05b00f60SXin Li cp++;
200*05b00f60SXin Li nshorts--;
201*05b00f60SXin Li }
202*05b00f60SXin Li if (length & 1) {
203*05b00f60SXin Li if ((i % 8) == 0)
204*05b00f60SXin Li ND_PRINT("%s0x%04x: ", ident, oset);
205*05b00f60SXin Li ND_PRINT(" %02x", GET_U_1(cp));
206*05b00f60SXin Li }
207*05b00f60SXin Li if (truncated)
208*05b00f60SXin Li nd_trunc_longjmp(ndo);
209*05b00f60SXin Li }
210*05b00f60SXin Li
211*05b00f60SXin Li void
hex_print(netdissect_options * ndo,const char * ident,const u_char * cp,u_int length)212*05b00f60SXin Li hex_print(netdissect_options *ndo,
213*05b00f60SXin Li const char *ident, const u_char *cp, u_int length)
214*05b00f60SXin Li {
215*05b00f60SXin Li hex_print_with_offset(ndo, ident, cp, length, 0);
216*05b00f60SXin Li }
217*05b00f60SXin Li
218*05b00f60SXin Li #ifdef MAIN
219*05b00f60SXin Li int
main(int argc,char * argv[])220*05b00f60SXin Li main(int argc, char *argv[])
221*05b00f60SXin Li {
222*05b00f60SXin Li hex_print("\n\t", "Hello, World!\n", 14);
223*05b00f60SXin Li printf("\n");
224*05b00f60SXin Li hex_and_ascii_print("\n\t", "Hello, World!\n", 14);
225*05b00f60SXin Li printf("\n");
226*05b00f60SXin Li ascii_print("Hello, World!\n", 14);
227*05b00f60SXin Li printf("\n");
228*05b00f60SXin Li #define TMSG "Now is the winter of our discontent...\n"
229*05b00f60SXin Li hex_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);
230*05b00f60SXin Li printf("\n");
231*05b00f60SXin Li hex_and_ascii_print_with_offset("\n\t", TMSG, sizeof(TMSG) - 1, 0x100);
232*05b00f60SXin Li printf("\n");
233*05b00f60SXin Li exit(0);
234*05b00f60SXin Li }
235*05b00f60SXin Li #endif /* MAIN */
236