2 * Routines for ISO/OSI network and transport protocol packet disassembly
3 * Main entrance point and common functions
6 * Laurent Deniel <laurent.deniel@free.fr>
7 * Ralf Schneider <Ralf.Schneider@t-online.de>
9 * Wireshark - Network traffic analyzer
10 * By Gerald Combs <gerald@wireshark.org>
11 * Copyright 1998 Gerald Combs
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version 2
16 * of the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 #include "osi-utils.h"
40 * XXX - shouldn't there be a centralized routine for dissecting NSAPs?
41 * See also "dissect_atm_nsap()" in epan/dissectors/packet-arp.c and
42 * "dissect_nsap()" in epan/dissectors/packet-isup.c.
45 print_nsap_net( const guint8 *ad, int length )
49 cur = ep_alloc(MAX_NSAP_LEN * 3 + 50);
50 print_nsap_net_buf( ad, length, cur, MAX_NSAP_LEN * 3 + 50);
55 print_nsap_net_buf( const guint8 *ad, int length, gchar *buf, int buf_len)
59 /* to do : NSAP / NET decoding */
61 if ( (length <= 0 ) || ( length > MAX_NSAP_LEN ) ) {
62 g_snprintf(buf, buf_len, "<Invalid length of NSAP>");
66 if ( ( length == RFC1237_NSAP_LEN ) || ( length == RFC1237_NSAP_LEN + 1 ) ) {
67 print_area_buf(ad, RFC1237_FULLAREA_LEN, cur, buf_len-(cur-buf));
69 print_system_id_buf( ad + RFC1237_FULLAREA_LEN, RFC1237_SYSTEMID_LEN, cur, buf_len-(cur-buf));
71 cur += g_snprintf(cur, buf_len-(cur-buf), "[%02x]",
72 ad[ RFC1237_FULLAREA_LEN + RFC1237_SYSTEMID_LEN ] );
73 if ( length == RFC1237_NSAP_LEN + 1 ) {
74 cur += g_snprintf(cur, buf_len-(cur-buf), "-%02x", ad[ length -1 ] );
77 else { /* probably format as standard */
78 print_area_buf( ad, length, buf, buf_len);
83 print_system_id( const guint8 *ad, int length )
87 cur = ep_alloc(MAX_SYSTEMID_LEN * 3 + 5);
88 print_system_id_buf(ad, length, cur, MAX_SYSTEMID_LEN * 3 + 5);
93 print_system_id_buf( const guint8 *ad, int length, gchar *buf, int buf_len)
98 if ( ( length <= 0 ) || ( length > MAX_SYSTEMID_LEN ) ) {
99 g_snprintf(buf, buf_len, "<Invalid length of SYSTEM ID>");
104 if ( ( 6 == length ) || /* System-ID */
105 ( 7 == length ) || /* LAN-ID */
106 ( 8 == length )) { /* LSP-ID */
107 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x%02x.%02x%02x.%02x%02x", ad[0], ad[1],
108 ad[2], ad[3], ad[4], ad[5] );
109 if ( ( 7 == length ) ||
111 cur += g_snprintf(cur, buf_len-(cur-buf), ".%02x", ad[6] );
114 cur += g_snprintf(cur, buf_len-(cur-buf), "-%02x", ad[7] );
119 while ( tmp < length / 4 ) { /* 16 / 4 == 4 > four Octets left to print */
120 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
121 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
122 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
123 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x.", ad[tmp++] );
125 if ( 1 == tmp ) { /* Special case for Designated IS */
127 g_snprintf(cur, buf_len-(cur-buf), ".%02x", ad[tmp] );
130 for ( ; tmp < length; ) { /* print the rest without dot */
131 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
138 print_area(const guint8 *ad, int length)
142 cur = ep_alloc(MAX_AREA_LEN * 3 + 20);
143 print_area_buf(ad, length, cur, MAX_AREA_LEN * 3 + 20);
148 print_area_buf(const guint8 *ad, int length, gchar *buf, int buf_len)
153 /* to do : all real area decoding now: NET is assumed if id len is 1 more byte
154 * and take away all these stupid resource consuming local statics
156 if (length <= 0 || length > MAX_AREA_LEN) {
157 g_snprintf(buf, buf_len, "<Invalid length of AREA>");
162 if ( ( ( NSAP_IDI_ISODCC == *ad )
163 || ( NSAP_IDI_GOSIP2 == *ad )
166 ( ( RFC1237_FULLAREA_LEN == length )
167 || ( RFC1237_FULLAREA_LEN + 1 == length )
169 ) { /* AFI is good and length is long enough */
171 /* there used to be a check for (length > RFC1237_FULLAREA_LEN + 1) here,
172 * in order to report an invalied length of AREA for DCC / GOSIP AFI,
173 * but that can *never* be the case because the if() test above explicitly
174 * tests for (length == RFC1237_FULLAREA_LEN) or (length == RFC1237_FULLAREA_LEN + 1)
177 cur += g_snprintf(cur, buf_len-(cur-buf), "[%02x|%02x:%02x][%02x|%02x:%02x:%02x|%02x:%02x]",
178 ad[0], ad[1], ad[2], ad[3], ad[4],
179 ad[5], ad[6], ad[7], ad[8] );
180 cur += g_snprintf(cur, buf_len-(cur-buf), "[%02x:%02x|%02x:%02x]",
181 ad[9], ad[10], ad[11], ad[12] );
182 if ( RFC1237_FULLAREA_LEN + 1 == length )
183 g_snprintf(cur, buf_len-(cur-buf), "-[%02x]", ad[20] );
185 else { /* print standard format */
186 if ( length == RFC1237_AREA_LEN ) {
187 g_snprintf(buf, buf_len, "%02x.%02x%02x", ad[0], ad[1], ad[2] );
191 while ( tmp < length / 4 ) { /* 16/4==4 > four Octets left to print */
192 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
193 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
194 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
195 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x.", ad[tmp++] );
197 if ( 1 == tmp ) { /* Special case for Designated IS */
199 g_snprintf(cur, buf_len-(cur-buf), "-%02x", ad[tmp] );
202 for ( ; tmp < length; ) { /* print the rest without dot */
203 cur += g_snprintf(cur, buf_len-(cur-buf), "%02x", ad[tmp++] );
208 } /* print_area_buf */