2 * Routines for H.248/MEGACO packet dissection
6 * Luis Ontanon 2005 - Context and Transaction Tracing
10 * Wireshark - Network traffic analyzer
11 * By Gerald Combs <gerald@wireshark.org>
12 * Copyright 1998 Gerald Combs
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version 2
17 * of the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 #include "packet-h248.h"
30 #include "packet-tpkt.h"
32 #define PNAME "H.248 MEGACO"
36 #define GATEWAY_CONTROL_PROTOCOL_USER_ID 14
39 /* Initialize the protocol and registered fields */
40 static int proto_h248 = -1;
41 static int hf_h248_mtpaddress_ni = -1;
42 static int hf_h248_mtpaddress_pc = -1;
43 static int hf_h248_pkg_name = -1;
44 static int hf_248_pkg_param = -1;
45 static int hf_h248_event_name = -1;
46 static int hf_h248_signal_name = -1;
47 static int hf_h248_signal_code = -1;
48 static int hf_h248_event_code = -1;
49 static int hf_h248_pkg_bcp_BNCChar_PDU = -1;
53 static int hf_h248_context_id = -1;
54 static int hf_h248_error_code = -1;
55 static int hf_h248_term_wild_type = -1;
56 static int hf_h248_term_wild_level = -1;
57 static int hf_h248_term_wild_position = -1;
59 static int hf_h248_no_pkg = -1;
60 static int hf_h248_no_sig = -1;
61 static int hf_h248_no_evt = -1;
62 static int hf_h248_param = -1;
64 static int hf_h248_serviceChangeReasonStr = -1;
66 #include "packet-h248-hf.c"
68 /* Initialize the subtree pointers */
69 static gint ett_h248 = -1;
70 static gint ett_mtpaddress = -1;
71 static gint ett_packagename = -1;
72 static gint ett_codec = -1;
73 static gint ett_wildcard = -1;
75 static gint ett_h248_no_pkg = -1;
76 static gint ett_h248_no_sig = -1;
77 static gint ett_h248_no_evt = -1;
79 static int h248_tap = -1;
81 static gcp_hf_ett_t h248_arrel = {{-1,-1,-1,-1,-1,-1},{-1,-1,-1,-1}};
83 #include "packet-h248-ett.c"
85 static dissector_handle_t h248_term_handle;
87 static emem_tree_t* msgs = NULL;
88 static emem_tree_t* trxs = NULL;
89 static emem_tree_t* ctxs_by_trx = NULL;
90 static emem_tree_t* ctxs = NULL;
92 static gboolean h248_prefs_initialized = FALSE;
93 static gboolean keep_persistent_data = FALSE;
94 static guint32 udp_port = 2945;
95 static guint32 temp_udp_port = 2945;
96 static guint32 tcp_port = 2945;
97 static guint32 temp_tcp_port = 2945;
98 static gboolean h248_desegment = TRUE;
102 static proto_tree *h248_tree;
103 static tvbuff_t* h248_tvb;
105 static dissector_handle_t h248_handle;
106 static dissector_handle_t h248_term_handle;
107 static dissector_handle_t h248_tpkt_handle;
109 /* Forward declarations */
110 static int dissect_h248_ServiceChangeReasonStr(gboolean implicit_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index);
112 static const value_string package_name_vals[] = {
113 { 0x0000, "Media stream properties H.248.1 Annex C" },
114 { 0x0001, "Generic H.248.1 Annex E" },
115 { 0x0002, "root H.248.1 Annex E" },
116 { 0x0003, "tonegen H.248.1 Annex E" },
117 { 0x0004, "tonedet H.248.1 Annex E" },
118 { 0x0005, "dg H.248.1 Annex E" },
119 { 0x0006, "dd H.248.1 Annex E" },
120 { 0x0007, "cg H.248.1 Annex E" },
121 { 0x0008, "cd H.248.1 Annex E" },
122 { 0x0009, "al H.248.1 Annex E" },
123 { 0x000a, "ct H.248.1 Annex E" },
124 { 0x000b, "nt H.248.1 Annex E" },
125 { 0x000c, "rtp H.248.1 Annex E" },
126 { 0x000d, "tdmc H.248.1 Annex E" },
127 { 0x000e, "ftmd H.248.1 Annex E" },
128 { 0x000f, "txc H.248.2" }, /* H.248.2 */
129 { 0x0010, "txp H.248.2" },
130 { 0x0011, "ctyp H.248.2" },
131 { 0x0012, "fax H.248.2" },
132 { 0x0013, "ipfax H.248.2" },
133 { 0x0014, "dis H.248.3" }, /* H.248.3 */
134 { 0x0015, "key H.248.3" },
135 { 0x0016, "kp H.248.3" },
136 { 0x0017, "labelkey H.248.3" },
137 { 0x0018, "kf H.248.3" },
138 { 0x0019, "ind H.248.3" },
139 { 0x001a, "ks H.248.3" },
140 { 0x001b, "anci H.248.3" },
141 { 0x001c, "dtd H.248.6" }, /* H.248.6 */
142 { 0x001d, "an H.248.7" }, /* H.248.7 */
143 { 0x001e, "Bearer Characteristics Q.1950 Annex A" }, /* Q.1950 Annex A */
144 { 0x001f, "Bearer Network Connection Cut Q.1950 Annex A" },
145 { 0x0020, "Reuse Idle Q.1950 Annex A" },
146 { 0x0021, "Generic Bearer Connection Q.1950 Annex A" },
147 { 0x0022, "Bearer Control Tunnelling Q.1950 Annex A" },
148 { 0x0023, "Basic Call Progress Tones Q.1950 Annex A" },
149 { 0x0024, "Expanded Call Progress Tones Q.1950 Annex A" },
150 { 0x0025, "Basic Services Tones Q.1950 Annex A" },
151 { 0x0026, "Expanded Services Tones Q.1950 Annex A" },
152 { 0x0027, "Intrusion Tones Q.1950 Annex A" },
153 { 0x0028, "Business Tones Q.1950 Annex A" },
154 { 0x0029, "Media Gateway Resource Congestion Handling H.248.10" }, /* H.248.10 */
155 { 0x002a, "H245 package H248.12" }, /* H.248.12 */
156 { 0x002b, "H323 bearer control package H.248.12" }, /* H.248.12 */
157 { 0x002c, "H324 package H.248.12" }, /* H.248.12 */
158 { 0x002d, "H245 command package H.248.12" }, /* H.248.12 */
159 { 0x002e, "H245 indication package H.248.12" }, /* H.248.12 */
160 { 0x002f, "3G User Plane" }, /* 3GPP TS 29.232 v4.1.0 */
161 { 0x0030, "3G Circuit Switched Data" },
162 { 0x0031, "3G TFO Control" },
163 { 0x0032, "3G Expanded Call Progress Tones" },
164 { 0x0033, "Advanced Audio Server (AAS Base)" }, /* H.248.9 */
165 { 0x0034, "AAS Digit Collection" }, /* H.248.9 */
166 { 0x0035, "AAS Recording" }, /* H.248.9 */
167 { 0x0036, "AAS Segment Management" }, /* H.248.9 */
168 { 0x0037, "Quality Alert Ceasing" }, /* H.248.13 */
169 { 0x0038, "Conferencing Tones Generation" }, /* H.248.27 */
170 { 0x0039, "Diagnostic Tones Generation" }, /* H.248.27 */
171 { 0x003a, "Carrier Tones Generation Package H.248.23" }, /* H.248.27 */
172 { 0x003b, "Enhanced Alerting Package H.248.23" }, /* H.248.23 */
173 { 0x003c, "Analog Display Signalling Package H.248.23" }, /* H.248.23 */
174 { 0x003d, "Multi-Frequency Tone Generation Package H.248.24" }, /* H.248.24 */
175 { 0x003e, "H.248.23Multi-Frequency Tone Detection Package H.248.24" }, /* H.248.24 */
176 { 0x003f, "Basic CAS Package H.248.25" }, /* H.248.25 */
177 { 0x0040, "Robbed Bit Signalling Package H.248.25" }, /* H.248.25 */
178 { 0x0041, "Operator Services and Emgergency Services Package H.248.25" },
179 { 0x0042, "Operator Services Extension Package H.248.25" },
180 { 0x0043, "Extended Analog Line Supervision Package H.248.26" },
181 { 0x0044, "Automatic Metering Package H.248.26" },
182 { 0x0045, "Inactivity Timer Package H.248.14" },
183 { 0x0046, "3G Modification of Link Characteristics Bearer Capability" }, /* 3GPP TS 29.232 v4.4.0 */
184 { 0x0047, "Base Announcement Syntax H.248.9" },
185 { 0x0048, "Voice Variable Syntax H.248.9" },
186 { 0x0049, "Announcement Set Syntax H.248.9" },
187 { 0x004a, "Phrase Variable Syntax H.248.9" },
188 { 0x004b, "Basic NAS package" },
189 { 0x004c, "NAS incoming package" },
190 { 0x004d, "NAS outgoing package" },
191 { 0x004e, "NAS control package" },
192 { 0x004f, "NAS root package" },
193 { 0x0050, "Profile Handling Package H.248.18" },
194 { 0x0051, "Media Gateway Overload Control Package H.248.11" },
195 { 0x0052, "Extended DTMF Detection Package H.248.16" },
196 { 0x0053, "Quiet Termination Line Test" },
197 { 0x0054, "Loopback Line Test Response" }, /* H.248.17 */
198 { 0x0055, "ITU 404Hz Line Test" }, /* H.248.17 */
199 { 0x0056, "ITU 816Hz Line Test" }, /* H.248.17 */
200 { 0x0057, "ITU 1020Hz Line Test" }, /* H.248.17 */
201 { 0x0058, "ITU 2100Hz Disable Tone Line Test" }, /* H.248.17 */
202 { 0x0059, "ITU 2100Hz Disable Echo Canceller Tone Line Test" }, /* H.248.17 */
203 { 0x005a, "ITU 2804Hz Tone Line Test" }, /* H.248.17 */
204 { 0x005b, "ITU Noise Test Tone Line Test" }, /* H.248.17 */
205 { 0x005c, "ITU Digital Pseudo Random Test Line Test" }, /* H.248.17 */
206 { 0x005d, "ITU ATME No.2 Test Line Response" }, /* H.248.17 */
207 { 0x005e, "ANSI 1004Hz Test Tone Line Test" }, /* H.248.17 */
208 { 0x005f, "ANSI Test Responder Line Test" }, /* H.248.17 */
209 { 0x0060, "ANSI 2225Hz Test Progress Tone Line Test" }, /* H.248.17 */
210 { 0x0061, "ANSI Digital Test Signal Line Test" }, /* H.248.17 */
211 { 0x0062, "ANSI Inverting Loopback Line Test Repsonse" }, /* H.248.17 */
212 { 0x0063, "Extended H.324 Packages H.248.12 Annex A" },
213 { 0x0064, "Extended H.245 Command Package H.248.12 Annex A" },
214 { 0x0065, "Extended H.245 Indication Package H.248.12 Annex A" },
215 { 0x0066, "Enhanced DTMF Detection Package H.248.16" },
216 { 0x0067, "Connection Group Identity Package Q.1950 Annex E" },
217 { 0x0068, "CTM Text Transport 3GPP TS 29.232 v5.2.0" },
218 { 0x0069, "SPNE Control Package Q.115.0" },
219 { 0x006a, "Semi-permanent Connection Package H.248.21" },
220 { 0x006b, "Shared Risk Group Package H.248.22" },
221 { 0x006c, "isuptn Annex B of ITU-T Rec. J.171" },
222 { 0x006d, "Basic CAS Addressing Package H.248.25" },
223 { 0x006e, "Floor Control Package H.248.19" },
224 { 0x006f, "Indication of Being Viewed Package H.248.19" },
225 { 0x0070, "Volume Control Package H.248.19" },
226 { 0x0071, "UNASSIGNED" },
227 { 0x0072, "Volume Detection Package H.248.19" },
228 { 0x0073, "Volume Level Mixing Package H.248.19" },
229 { 0x0074, "Mixing Volume Level Control Package H.248.19" },
230 { 0x0075, "Voice Activated Video Switch Package H.248.19" },
231 { 0x0076, "Lecture Video Mode Package H.248.19" },
232 { 0x0077, "Contributing Video Source Package H.248.19" },
233 { 0x0078, "Video Window Package H.248.19" },
234 { 0x0079, "Tiled Window Package H.248.19" },
235 { 0x007a, "Adaptive Jitter Buffer Package H.248.31" },
236 { 0x007b, "International CAS Package H.248.28" },
237 { 0x007c, "CAS Blocking Package H.248.28" },
238 { 0x007d, "International CAS Compelled Package H.248.29" },
239 { 0x007e, "International CAS Compelled with Overlap Package H.248.29" },
240 { 0x007f, "International CAS Compelled with End-to-end Package H.248.29" },
241 { 0x0080, "RTCP XR Package H.248.30" },
242 { 0x0081, "RTCP XR Burst Metrics Package H.248.30" },
243 { 0x0082, "threegcsden 3G Circuit Switched Data" }, /* 3GPP TS 29.232 v5.6.0 */
244 { 0x0083, "threegiptra 3G Circuit Switched Data" }, /* 3GPP TS 29.232 v5.6.0 */
245 { 0x0084, "threegflex 3G Circuit Switched Data" }, /* 3GPP TS 29.232 v5.6.0 */
246 { 0x0085, "H.248 PCMSB" },
247 { 0x008a, "TIPHON Extended H.248/MEGACO Package" }, /* ETSI specification TS 101 3 */
248 { 0x008b, "Differentiated Services Package" }, /* Annex A of ETSI TS 102 333 */
249 { 0x008c, "Gate Management Package" }, /* Annex B of ETSI TS 102 333 */
250 { 0x008d, "Traffic Management Package" }, /* Annex C of ETSI TS 102 333 */
251 { 0x008e, "Gate Recovery Information Package" }, /* Annex D of ETSI TS 102 333 */
252 { 0x008f, "NAT Traversal Package" }, /* Annex E of ETSI TS 102 333 */
253 { 0x0090, "MPLS Package" }, /* Annex F of ETSI TS 102 333 */
254 { 0x0091, "VLAN Package" }, /* Annex G of ETSI TS 102 333 */
255 { 0x8000, "Ericsson IU" },
256 { 0x8001, "Ericsson UMTS and GSM Circuit" },
257 { 0x8002, "Ericsson Tone Generator Package" },
258 { 0x8003, "Ericsson Line Test Package" },
259 { 0x8004, "Nokia Advanced TFO Package" },
260 { 0x8005, "Nokia IWF Package" },
261 { 0x8006, "Nokia Root Package" },
262 { 0x8007, "Nokia Trace Package" },
263 { 0x8008, "Ericsson V5.2 Layer" },
264 { 0x8009, "Ericsson Detailed Termination Information Package" },
265 { 0x800a, "Nokia Bearer Characteristics Package" },
269 * This table consist of PackageName + EventName and its's corresponding string
272 static const value_string event_name_vals[] = {
273 { 0x00000000, "Media stream properties H.248.1 Annex C" },
274 { 0x00010000, "g H.248.1 Annex E" },
275 { 0x00010001, "g/Cause" },
276 { 0x00010002, "g/Signal Completion" },
277 { 0x00040000, "tonedet H.248.1 Annex E" },
278 { 0x00040001, "tonedet/std(Start tone detected)" },
279 { 0x00040002, "tonedet/etd(End tone detected)" },
280 { 0x00040003, "tonedet/ltd(Long tone detected)" },
281 { 0x00060000, "dd H.248.1 Annex E" },
282 { 0x00060001, "dd/std" },
283 { 0x00060002, "dd/etd" },
284 { 0x00060003, "dd/ltd" },
285 { 0x00060004, "dd, DigitMap Completion Event" },
286 { 0x00060010, "dd/d0, DTMF character 0" },
287 { 0x00060011, "dd/d1, DTMF character 1" },
288 { 0x00060012, "dd/d2, DTMF character 2" },
289 { 0x00060013, "dd/d3, DTMF character 3" },
290 { 0x00060014, "dd/d4, DTMF character 4" },
291 { 0x00060015, "dd/d5, DTMF character 5" },
292 { 0x00060016, "dd/d6, DTMF character 6" },
293 { 0x00060017, "dd/d7, DTMF character 7" },
294 { 0x00060018, "dd/d8, DTMF character 8" },
295 { 0x00060019, "dd/d9, DTMF character 9" },
296 { 0x0006001a, "dd/a, DTMF character A" },
297 { 0x0006001b, "dd/b, DTMF character B" },
298 { 0x0006001c, "dd/c, DTMF character C" },
299 { 0x0006001d, "dd/d, DTMF character D" },
300 { 0x00060020, "dd/*, DTMF character *" },
301 { 0x00060021, "dd/#, DTMF character #" },
302 { 0x00080030, "cd, Dial Tone" },
303 { 0x00080031, "cd, Ringing Tone" },
304 { 0x00080032, "cd, Busy Tone" },
305 { 0x00080033, "cd, Congestion Tone" },
306 { 0x00080034, "cd, Special Information Tone" },
307 { 0x00080035, "cd, (Recording) Warning Tone" },
308 { 0x00080036, "cd, Payphone Recognition Tone" },
309 { 0x00080037, "cd, Call Waiting Tone" },
310 { 0x00080038, "cd, Caller Waiting Tone" },
311 { 0x00090004, "al, onhook" },
312 { 0x00090005, "al, offhook" },
313 { 0x00090006, "al, flashhook" },
314 { 0x0009ffff, "al, *" },
315 { 0x000a0005, "ct, Completion of Continuity test" },
316 { 0x000b0005, "nt, network failure" },
317 { 0x000b0006, "nt, quality alert" },
318 { 0x000c0001, "rtp, Payload Transition" },
319 { 0x00210000, "Generic Bearer Connection Q.1950 Annex A" },
320 { 0x00210001, "GB/BNCChange" },
321 { 0x00220001, "BT/TIND (Tunnel Indication)" },
322 { 0x002a0001, "H.245/h245msg (Incoming H.245 Message)" },
323 { 0x002a0004, "H.245/h245ChC (H.245 Channel Closed)" },
324 { 0x00450000, "Inactivity Timer H.248.14" },
325 { 0x00450001, "it/ito" },
326 { 0x00450002, "it/ito" },
327 { 0x00460001, "threegmlc/mod_link_supp (Bearer Modification Support Event)" },
328 { 0x800a0000, "Nokia Bearer Characteristics Package" },
333 * This table consist of PackageName + SignalName and its's corresponding string
335 static const value_string signal_name_vals[] = {
336 { 0x00000000, "Media stream properties H.248.1 Annex C" },
337 { 0x00010000, "g H.248.1 Annex E" },
338 { 0x00030001, "tonegen/pt(Play tone)" },
339 { 0x00050010, "dg, DTMF character 0" },
340 { 0x00050011, "dg, DTMF character 1" },
341 { 0x00050012, "dg, DTMF character 2" },
342 { 0x00050013, "dg, DTMF character 3" },
343 { 0x00050014, "dg, DTMF character 4" },
344 { 0x00050015, "dg, DTMF character 5" },
345 { 0x00050016, "dg, DTMF character 6" },
346 { 0x00050017, "dg, DTMF character 7" },
347 { 0x00050018, "dg, DTMF character 8" },
348 { 0x00050019, "dg, DTMF character 9" },
349 { 0x0005001a, "dg, DTMF character A" },
350 { 0x0005001b, "dg, DTMF character B" },
351 { 0x0005001c, "dg, DTMF character C" },
352 { 0x0005001d, "dg, DTMF character D" },
353 { 0x00050020, "dg, DTMF character *" },
354 { 0x00050021, "dg, DTMF character #" },
355 { 0x00070030, "cg, Dial Tone" },
356 { 0x00070031, "cg/rt (Ringing Tone)" },
357 { 0x00070032, "cg, Busy Tone" },
358 { 0x00070033, "cg, Congestion Tone" },
359 { 0x00070034, "cg, Special Information Tone" },
360 { 0x00070035, "cg, (Recording) Warning Tone" },
361 { 0x00070036, "cg, Payphone Recognition Tone" },
362 { 0x00070037, "cg, Call Waiting Tone" },
363 { 0x00070038, "cg, Caller Waiting Tone" },
364 { 0x00090002, "al, ring" },
365 { 0x0009ffff, "al, *" },
366 { 0x000a0003, "ct, Continuity test" },
367 { 0x000a0004, "ct, Continuity respond" },
368 { 0x00210000, "GB Generic Bearer Connection Q.1950 Annex A" },
369 { 0x00210001, "GB/EstBNC(Establish BNC)" },
370 { 0x00210002, "GB/ModBNC (Modify BNC)" },
371 { 0x00210003, "GB/RelBNC(Release BNC)" },
373 { 0x002a0001, "H.245/cs (channel state)" },
374 { 0x002a0002, "H.245/termtype (Terminal Type)" },
376 { 0x002c0001, "H.324/cmod (Communication mode)" },
377 { 0x002c0002, "H.324/muxlv (Highest Multiplexing level)" },
378 { 0x002c0003, "H.324/demux (Demultiplex)" },
379 { 0x002c0004, "H.324/h223capr (Remote H.223 capability)" },
380 { 0x002c0005, "H.324/muxtbl_in (Incoming Multiplex Table)" },
381 { 0x002c0006, "H.324/muxtbl_out (Outgoing Multiplex Table)" },
383 { 0x800a0000, "Nokia Bearer Characteristics Package" },
389 static const value_string context_id_type[] = {
390 {NULL_CONTEXT,"0 (Null Context)"},
391 {CHOOSE_CONTEXT,"$ (Choose Context)"},
392 {ALL_CONTEXTS,"* (All Contexts)"},
397 static const value_string h248_reasons[] = {
398 { 400, "Syntax error in message"},
399 { 401, "Protocol Error"},
400 { 402, "Unauthorized"},
401 { 403, "Syntax error in transaction request"},
402 { 406, "Version Not Supported"},
403 { 410, "Incorrect identifier"},
404 { 411, "The transaction refers to an unknown ContextId"},
405 { 412, "No ContextIDs available"},
406 { 421, "Unknown action or illegal combination of actions"},
407 { 422, "Syntax Error in Action"},
408 { 430, "Unknown TerminationID"},
409 { 431, "No TerminationID matched a wildcard"},
410 { 432, "Out of TerminationIDs or No TerminationID available"},
411 { 433, "TerminationID is already in a Context"},
412 { 434, "Max number of Terminations in a Context exceeded"},
413 { 435, "Termination ID is not in specified Context"},
414 { 440, "Unsupported or unknown Package"},
415 { 441, "Missing Remote or Local Descriptor"},
416 { 442, "Syntax Error in Command"},
417 { 443, "Unsupported or Unknown Command"},
418 { 444, "Unsupported or Unknown Descriptor"},
419 { 445, "Unsupported or Unknown Property"},
420 { 446, "Unsupported or Unknown Parameter"},
421 { 447, "Descriptor not legal in this command"},
422 { 448, "Descriptor appears twice in a command"},
423 { 449, "Unsupported or Unknown Parameter or Property Value"},
424 { 450, "No such property in this package"},
425 { 451, "No such event in this package"},
426 { 452, "No such signal in this package"},
427 { 453, "No such statistic in this package"},
428 { 454, "No such parameter value in this package"},
429 { 455, "Property illegal in this Descriptor"},
430 { 456, "Property appears twice in this Descriptor"},
431 { 457, "Missing parameter in signal or event"},
432 { 458, "Unexpected Event/Request ID"},
433 { 459, "Unsupported or Unknown Profile"},
434 { 460, "Unable to set statistic on stream"},
435 { 471, "Implied Add for Multiplex failure"},
436 { 500, "Internal software Failure in MG"},
437 { 501, "Not Implemented"},
439 { 503, "Service Unavailable"},
440 { 504, "Command Received from unauthorized entity"},
441 { 505, "Transaction Request Received before a Service Change Reply has been received"},
442 { 506, "Number of Transaction Pendings Exceeded"},
443 { 510, "Insufficient resources"},
444 { 512, "Media Gateway unequipped to detect requested Event"},
445 { 513, "Media Gateway unequipped to generate requested Signals"},
446 { 514, "Media Gateway cannot send the specified announcement"},
447 { 515, "Unsupported Media Type"},
448 { 517, "Unsupported or invalid mode"},
449 { 518, "Event buffer full"},
450 { 519, "Out of space to store digit map"},
451 { 520, "Digit Map undefined in the MG"},
452 { 521, "Termination is ServiceChangeing"},
453 { 522, "Functionality Requested in Topology Triple Not Supported"},
454 { 526, "Insufficient bandwidth"},
455 { 529, "Internal hardware failure in MG"},
456 { 530, "Temporary Network failure"},
457 { 531, "Permanent Network failure"},
458 { 532, "Audited Property, Statistic, Event or Signal does not exist"},
459 { 533, "Response exceeds maximum transport PDU size"},
460 { 534, "Illegal write or read only property"},
461 { 540, "Unexpected initial hook state"},
462 { 542, "Command is not allowed on this termination"},
463 { 581, "Does Not Exist"},
464 { 600, "Illegal syntax within an announcement specification"},
465 { 601, "Variable type not supported"},
466 { 602, "Variable value out of range"},
467 { 603, "Category not supported"},
468 { 604, "Selector type not supported"},
469 { 605, "Selector value not supported"},
470 { 606, "Unknown segment ID"},
471 { 607, "Mismatch between play specification and provisioned data"},
472 { 608, "Provisioning error"},
473 { 609, "Invalid offset"},
474 { 610, "No free segment IDs"},
475 { 611, "Temporary segment not found"},
476 { 612, "Segment in use"},
477 { 613, "ISP port limit overrun"},
478 { 614, "No modems available"},
479 { 615, "Calling number unacceptable"},
480 { 616, "Called number unacceptable"},
481 { 900, "Service Restored"},
484 { 903, "MGC Directed Change"},
485 { 904, "Termination malfunctioning"},
486 { 905, "Termination taken out of service"},
487 { 906, "Loss of lower layer connectivity (e.g. downstream sync)"},
488 { 907, "Transmission Failure"},
489 { 908, "MG Impending Failure"},
490 { 909, "MGC Impending Failure"},
491 { 910, "Media Capability Failure"},
492 { 911, "Modem Capability Failure"},
493 { 912, "Mux Capability Failure"},
494 { 913, "Signal Capability Failure"},
495 { 914, "Event Capability Failure"},
496 { 915, "State Loss"},
497 { 916, "Packages Change"},
498 { 917, "Capabilities Change"},
499 { 918, "Cancel Graceful"},
500 { 919, "Warm Failover"},
501 { 920, "Cold Failover"},
505 static const value_string wildcard_modes[] = {
511 static const value_string wildcard_levels[] = {
512 { 0, "This One Level" },
513 { 1, "This Level and those below" },
517 static h248_curr_info_t curr_info = {NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
518 static guint32 error_code;
519 static gcp_wildcard_t wild_term;
522 extern void h248_param_ber_integer(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo, int hfid, h248_curr_info_t* u _U_, void* implicit) {
524 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
525 dissect_ber_integer(implicit ? *((gboolean*)implicit) : FALSE, &asn1_ctx, tree, tvb, 0, hfid, NULL);
528 extern void h248_param_ber_octetstring(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo, int hfid, h248_curr_info_t* u _U_, void* implicit) {
530 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
531 dissect_ber_octet_string(implicit ? *((gboolean*)implicit) : FALSE, &asn1_ctx, tree, tvb, 0, hfid, NULL);
534 extern void h248_param_ber_boolean(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo, int hfid, h248_curr_info_t* u _U_, void* implicit) {
536 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
537 dissect_ber_boolean(implicit ? *((gboolean*)implicit) : FALSE, &asn1_ctx, tree, tvb, 0, hfid);
540 extern void h248_param_item(proto_tree* tree,
542 packet_info* pinfo _U_,
544 h248_curr_info_t* h248_info _U_,
546 int len = lenp ? *((int*)lenp) : -1;
547 proto_tree_add_item(tree,hfid,tvb,0,len,FALSE);
550 extern void h248_param_external_dissector(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo , int hfid _U_, h248_curr_info_t* u _U_, void* dissector_hdl) {
551 call_dissector((dissector_handle_t) dissector_hdl,tvb,pinfo,tree);
555 static const h248_package_t no_package = { 0xffff, &hf_h248_no_pkg, &ett_h248_no_pkg, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
556 static const h248_pkg_sig_t no_signal = { 0, &hf_h248_no_sig, &ett_h248_no_sig, NULL, NULL };
557 static const h248_pkg_param_t no_param = { 0, &hf_h248_param, h248_param_item, NULL };
558 static const h248_pkg_evt_t no_event = { 0, &hf_h248_no_evt, &ett_h248_no_evt, NULL, NULL };
560 static GPtrArray* packages = NULL;
562 extern void h248_param_PkgdName(proto_tree* tree, tvbuff_t* tvb, packet_info* pinfo , int hfid _U_, h248_curr_info_t* u1 _U_, void* u2 _U_) {
563 tvbuff_t *new_tvb = NULL;
564 proto_tree *package_tree=NULL;
565 guint16 name_major, name_minor;
567 const h248_package_t* pkg = NULL;
571 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
574 offset = dissect_ber_octet_string(FALSE, &asn1_ctx, tree, tvb, offset, hfid , &new_tvb);
577 /* this field is always 4 bytes so just read it into two integers */
578 name_major=tvb_get_ntohs(new_tvb, 0);
579 name_minor=tvb_get_ntohs(new_tvb, 2);
581 /* do the prettification */
582 proto_item_append_text(ber_last_created_item, " %s (%04x)", val_to_str(name_major, package_name_vals, "Unknown Package"), name_major);
588 package_tree = proto_item_add_subtree(ber_last_created_item, ett_packagename);
589 proto_tree_add_uint(package_tree, hf_h248_pkg_name, tvb, offset-4, 2, name_major);
591 for(i=0; i < packages->len; i++) {
592 pkg = g_ptr_array_index(packages,i);
594 if (name_major == pkg->id) {
601 if (! pkg ) pkg = &no_package;
604 pi = proto_tree_add_uint(package_tree, hf_248_pkg_param, tvb, offset-2, 2, name_minor);
606 if (pkg->signal_names && ( strval = match_strval(name_minor, pkg->signal_names) )) {
607 strval = ep_strdup_printf("%s (%d)",strval,name_minor);
609 strval = ep_strdup_printf("Unknown (%d)",name_minor);
612 proto_item_set_text(pi,"Signal ID: %s", strval);
619 static int dissect_h248_trx_id(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32* trx_id_p) {
628 offset=dissect_ber_identifier(pinfo, tree, tvb, offset, &class, &pc, &tag);
629 offset=dissect_ber_length(pinfo, tree, tvb, offset, &len, NULL);
631 len=tvb_length_remaining(tvb, offset);
635 if (len > 8 || len < 1) {
639 trx_id=(trx_id<<8)|tvb_get_guint8(tvb, offset);
642 if (trx_id > 0xffffffff) {
643 proto_item* pi = proto_tree_add_text(tree, tvb, offset-len, len,"transactionId %" G_GINT64_MODIFIER "u", trx_id);
644 proto_item_set_expert_flags(pi, PI_MALFORMED, PI_WARN);
649 proto_tree_add_uint(tree, hf_h248_transactionId, tvb, offset-len, len, (guint32)trx_id);
650 *trx_id_p = (guint32)trx_id;
657 static int dissect_h248_ctx_id(gboolean implicit_tag, packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32* ctx_id_p) {
666 offset=dissect_ber_identifier(pinfo, tree, tvb, offset, &class, &pc, &tag);
667 offset=dissect_ber_length(pinfo, tree, tvb, offset, &len, NULL);
669 len=tvb_length_remaining(tvb, offset);
673 if (len > 8 || len < 1) {
677 ctx_id=(ctx_id<<8)|tvb_get_guint8(tvb, offset);
681 if (ctx_id > 0xffffffff) {
682 proto_item* pi = proto_tree_add_text(tree, tvb, offset-len, len,
683 "contextId: %" G_GINT64_MODIFIER "u", ctx_id);
684 proto_item_set_expert_flags(pi, PI_MALFORMED, PI_WARN);
686 *ctx_id_p = 0xfffffffd;
689 proto_item* pi = proto_tree_add_uint(tree, hf_h248_context_id, tvb, offset-len, len, (guint32)ctx_id);
691 if ( ctx_id == NULL_CONTEXT ) {
692 proto_item_set_text(pi,"contextId: Null Context(0)");
693 } else if ( ctx_id == CHOOSE_CONTEXT ) {
694 proto_item_set_text(pi,"contextId: $ (Choose Context = 0xfffffffe)");
695 } else if ( ctx_id == ALL_CONTEXTS ) {
696 proto_item_set_text(pi,"contextId: * (All Contexts = 0xffffffff)");
699 *ctx_id_p = (guint32) ctx_id;
706 void h248_register_package(const h248_package_t* pkg) {
707 if (! packages) packages = g_ptr_array_new();
709 g_assert(pkg != NULL);
711 g_ptr_array_add(packages,(void*)pkg);
714 static guint32 packageandid;
716 static int dissect_h248_PkgdName(gboolean implicit_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index) {
717 tvbuff_t *new_tvb = NULL;
718 proto_tree *package_tree=NULL;
719 guint16 name_major, name_minor;
721 const h248_package_t* pkg = NULL;
725 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &new_tvb);
728 /* this field is always 4 bytes so just read it into two integers */
729 name_major=tvb_get_ntohs(new_tvb, 0);
730 name_minor=tvb_get_ntohs(new_tvb, 2);
731 packageandid=(name_major<<16)|name_minor;
733 /* do the prettification */
734 proto_item_append_text(ber_last_created_item, " %s (%04x)", val_to_str(name_major, package_name_vals, "Unknown Package"), name_major);
737 package_tree = proto_item_add_subtree(ber_last_created_item, ett_packagename);
738 proto_tree_add_uint(package_tree, hf_h248_pkg_name, tvb, offset-4, 2, name_major);
741 for(i=0; i < packages->len; i++) {
742 pkg = g_ptr_array_index(packages,i);
744 if (name_major == pkg->id) {
751 if (! pkg ) pkg = &no_package;
754 proto_item* pi = proto_tree_add_uint(package_tree, hf_248_pkg_param, tvb, offset-2, 2, name_minor);
757 if (pkg->param_names && ( strval = match_strval(name_minor, pkg->param_names) )) {
758 strval = ep_strdup_printf("%s (%d)",strval,name_minor);
760 strval = ep_strdup_printf("Unknown (%d)",name_minor);
763 proto_item_set_text(pi,"Parameter: %s", strval);
774 static int dissect_h248_EventName(gboolean implicit_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index) {
776 proto_tree *package_tree=NULL;
777 guint16 name_major, name_minor;
779 const h248_package_t* pkg = NULL;
780 const h248_pkg_evt_t* evt = NULL;
784 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &new_tvb);
787 /* this field is always 4 bytes so just read it into two integers */
788 name_major=tvb_get_ntohs(new_tvb, 0);
789 name_minor=tvb_get_ntohs(new_tvb, 2);
790 packageandid=(name_major<<16)|name_minor;
792 /* do the prettification */
793 proto_item_append_text(ber_last_created_item, " %s (%04x)", val_to_str(name_major, package_name_vals, "Unknown Package"), name_major);
795 package_tree = proto_item_add_subtree(ber_last_created_item, ett_packagename);
797 proto_tree_add_uint(package_tree, hf_h248_pkg_name, tvb, offset-4, 2, name_major);
800 for(i=0; i < packages->len; i++) {
801 pkg = g_ptr_array_index(packages,i);
803 if (name_major == pkg->id) {
810 if (! pkg ) pkg = &no_package;
815 for (evt = pkg->events; evt->hfid; evt++) {
816 if (name_minor == evt->id) {
821 if (! evt->hfid) evt = &no_event;
829 proto_item* pi = proto_tree_add_uint(package_tree, hf_h248_event_code, tvb, offset-2, 2, name_minor);
832 if (pkg->event_names && ( strval = match_strval(name_minor, pkg->event_names) )) {
833 strval = ep_strdup_printf("%s (%d)",strval,name_minor);
835 strval = ep_strdup_printf("Unknown (%d)",name_minor);
838 proto_item_set_text(pi,"Event ID: %s", strval);
842 curr_info.pkg = &no_package;
843 curr_info.evt = &no_event;
851 static int dissect_h248_SignalName(gboolean implicit_tag , tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index) {
853 proto_tree *package_tree=NULL;
854 guint16 name_major, name_minor;
856 const h248_package_t* pkg = NULL;
857 const h248_pkg_sig_t* sig;
861 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &new_tvb);
864 /* this field is always 4 bytes so just read it into two integers */
865 name_major=tvb_get_ntohs(new_tvb, 0);
866 name_minor=tvb_get_ntohs(new_tvb, 2);
867 packageandid=(name_major<<16)|name_minor;
869 /* do the prettification */
870 proto_item_append_text(ber_last_created_item, " %s (%04x)", val_to_str(name_major, package_name_vals, "Unknown Package"), name_major);
872 package_tree = proto_item_add_subtree(ber_last_created_item, ett_packagename);
874 proto_tree_add_uint(package_tree, hf_h248_pkg_name, tvb, offset-4, 2, name_major);
876 for(i=0; i < packages->len; i++) {
877 pkg = g_ptr_array_index(packages,i);
879 if (name_major == pkg->id) {
886 if (! pkg ) pkg = &no_package;
889 for (sig = pkg->signals; sig->hfid; sig++) {
890 if (name_minor == sig->id) {
895 if (! sig->hfid) sig = &no_signal;
900 curr_info.pkg = &no_package;
901 curr_info.sig = &no_signal;
905 proto_item* pi = proto_tree_add_uint(package_tree, hf_h248_signal_code, tvb, offset-2, 2, name_minor);
908 if (pkg->signal_names && ( strval = match_strval(name_minor, pkg->signal_names) )) {
909 strval = ep_strdup_printf("%s (%d)",strval,name_minor);
911 strval = ep_strdup_printf("Unknown (%d)",name_minor);
914 proto_item_set_text(pi,"Signal ID: %s", strval);
918 curr_info.pkg = &no_package;
919 curr_info.sig = &no_signal;
925 static int dissect_h248_PropertyID(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) {
933 int old_offset, end_offset;
935 const h248_package_t* pkg;
936 const h248_pkg_param_t* prop;
939 offset=dissect_ber_identifier(actx->pinfo, tree, tvb, offset, &class, &pc, &tag);
940 offset=dissect_ber_length(actx->pinfo, tree, tvb, offset, &len, &ind);
941 end_offset=offset+len;
943 if( (class!=BER_CLASS_UNI)
944 ||(tag!=BER_UNI_TAG_OCTETSTRING) ){
945 proto_tree_add_text(tree, tvb, offset-2, 2, "H.248 BER Error: OctetString expected but Class:%d PC:%d Tag:%d was unexpected", class, pc, tag);
950 next_tvb = tvb_new_subset(tvb, offset , len , len );
951 name_major = packageandid >> 16;
952 name_minor = packageandid & 0xffff;
954 pkg = (curr_info.pkg) ? curr_info.pkg : &no_package;
956 if (pkg->properties) {
957 for (prop = pkg->properties; prop && prop->hfid; prop++) {
958 if (name_minor == prop->id) {
966 if (prop && prop->hfid ) {
967 if (!prop->dissector) prop = &no_param;
968 prop->dissector(tree, next_tvb, actx->pinfo, *(prop->hfid), &curr_info, prop->data);
975 static int dissect_h248_SigParameterName(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) {
977 guint32 param_id = 0xffffffff;
978 const h248_pkg_param_t* sigpar;
982 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &next_tvb);
983 pi = get_ber_last_created_item();
985 switch(tvb_length(next_tvb)) {
986 case 4: param_id = tvb_get_ntohl(next_tvb,0); break;
987 case 3: param_id = tvb_get_ntoh24(next_tvb,0); break;
988 case 2: param_id = tvb_get_ntohs(next_tvb,0); break;
989 case 1: param_id = tvb_get_guint8(next_tvb,0); break;
993 curr_info.par = &no_param;
995 if (curr_info.sig && curr_info.sig->parameters) {
996 for(sigpar = curr_info.sig->parameters; sigpar->hfid; sigpar++) {
997 if (sigpar->id == param_id) {
998 curr_info.par = sigpar;
1004 if (curr_info.sig && curr_info.sig->param_names && ( strval = match_strval(param_id, curr_info.sig->param_names) )) {
1005 strval = ep_strdup_printf("%s (%d)",strval,param_id);
1007 strval = ep_strdup_printf("Unknown (%d)",param_id);
1010 proto_item_set_text(pi,"Parameter: %s", strval);
1015 static int dissect_h248_SigParamValue(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) {
1017 int old_offset, end_offset;
1024 offset=dissect_ber_identifier(actx->pinfo, tree, tvb, offset, &class, &pc, &tag);
1025 offset=dissect_ber_length(actx->pinfo, tree, tvb, offset, &len, &ind);
1026 end_offset=offset+len;
1028 if( (class!=BER_CLASS_UNI)
1029 ||(tag!=BER_UNI_TAG_OCTETSTRING) ){
1030 proto_tree_add_text(tree, tvb, offset-2, 2, "H.248 BER Error: OctetString expected but Class:%d PC:%d Tag:%d was unexpected", class, pc, tag);
1035 next_tvb = tvb_new_subset(tvb,offset,len,len);
1037 if ( curr_info.par && curr_info.par->dissector) {
1038 curr_info.par->dissector(tree, next_tvb, actx->pinfo, *(curr_info.par->hfid), &curr_info, curr_info.par->data);
1044 static int dissect_h248_EventParameterName(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) {
1046 guint32 param_id = 0xffffffff;
1047 const h248_pkg_param_t* evtpar;
1048 const gchar* strval;
1051 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &next_tvb);
1052 pi = get_ber_last_created_item();
1055 switch(tvb_length(next_tvb)) {
1056 case 4: param_id = tvb_get_ntohl(next_tvb,0); break;
1057 case 3: param_id = tvb_get_ntoh24(next_tvb,0); break;
1058 case 2: param_id = tvb_get_ntohs(next_tvb,0); break;
1059 case 1: param_id = tvb_get_guint8(next_tvb,0); break;
1065 curr_info.par = &no_param;
1067 if (curr_info.evt && curr_info.evt->parameters) {
1068 for(evtpar = curr_info.evt->parameters; evtpar->hfid; evtpar++) {
1069 if (evtpar->id == param_id) {
1070 curr_info.par = evtpar;
1075 curr_info.par = &no_param;
1078 if (curr_info.evt && curr_info.evt->param_names && ( strval = match_strval(param_id, curr_info.evt->param_names) )) {
1079 strval = ep_strdup_printf("%s (%d)",strval,param_id);
1081 strval = ep_strdup_printf("Unknown (%d)",param_id);
1084 proto_item_set_text(pi,"Parameter: %s", strval);
1090 static int dissect_h248_EventParamValue(gboolean implicit_tag _U_, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index _U_) {
1092 int old_offset, end_offset;
1099 offset=dissect_ber_identifier(actx->pinfo, tree, tvb, offset, &class, &pc, &tag);
1100 offset=dissect_ber_length(actx->pinfo, tree, tvb, offset, &len, &ind);
1101 end_offset=offset+len;
1103 if( (class!=BER_CLASS_UNI)
1104 ||(tag!=BER_UNI_TAG_OCTETSTRING) ){
1105 proto_tree_add_text(tree, tvb, offset-2, 2, "H.248 BER Error: OctetString expected but Class:%d PC:%d Tag:%d was unexpected", class, pc, tag);
1110 next_tvb = tvb_new_subset(tvb,offset,len,len);
1112 if ( curr_info.par && curr_info.par->dissector) {
1113 curr_info.par->dissector(tree, next_tvb, actx->pinfo, *(curr_info.par->hfid), &curr_info, curr_info.par->data);
1119 static int dissect_h248_MtpAddress(gboolean implicit_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx _U_, proto_tree *tree, int hf_index) {
1121 proto_tree *mtp_tree=NULL;
1123 int i, len, old_offset;
1126 offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &new_tvb);
1129 /* this field is either 2 or 4 bytes so just read it into an integer */
1131 len=tvb_length(new_tvb);
1133 val= (val<<8)|tvb_get_guint8(new_tvb, i);
1136 /* do the prettification */
1137 proto_item_append_text(ber_last_created_item, " NI = %d, PC = %d ( %d-%d )", val&0x03,val>>2,val&0x03,val>>2);
1139 mtp_tree = proto_item_add_subtree(ber_last_created_item, ett_mtpaddress);
1141 proto_tree_add_uint(mtp_tree, hf_h248_mtpaddress_ni, tvb, old_offset, offset-old_offset, val&0x03);
1142 proto_tree_add_uint(mtp_tree, hf_h248_mtpaddress_pc, tvb, old_offset, offset-old_offset, val>>2);
1148 #define H248_TAP() do { if (keep_persistent_data && curr_info.cmd) tap_queue_packet(h248_tap, actx->pinfo, curr_info.cmd); } while(0)
1150 #include "packet-h248-fn.c"
1152 static void dissect_h248_tpkt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
1153 dissect_tpkt_encap(tvb, pinfo, tree, h248_desegment, h248_handle);
1157 dissect_h248(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1159 proto_item *h248_item;
1160 asn1_ctx_t asn1_ctx;
1164 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
1166 curr_info.msg = NULL;
1167 curr_info.trx = NULL;
1168 curr_info.ctx = NULL;
1169 curr_info.cmd = NULL;
1170 curr_info.term = NULL;
1171 curr_info.pkg = NULL;
1172 curr_info.evt = NULL;
1173 curr_info.sig = NULL;
1174 curr_info.stat = NULL;
1175 curr_info.par = NULL;
1177 /* Check if it is actually a text-based H.248 encoding, which we
1178 dissect with the "megaco" dissector in Wireshark. (Both
1179 encodings are MEGACO (RFC 3015) and both are H.248.)
1181 if(tvb_length(tvb)>=6){
1182 if(!tvb_strneql(tvb, 0, "MEGACO", 6)){
1183 static dissector_handle_t megaco_handle=NULL;
1185 megaco_handle = find_dissector("megaco");
1188 call_dissector(megaco_handle, tvb, pinfo, tree);
1194 /* Make entry in the Protocol column on summary display */
1195 if (check_col(pinfo->cinfo, COL_PROTOCOL))
1196 col_set_str(pinfo->cinfo, COL_PROTOCOL, "H.248");
1199 h248_item = proto_tree_add_item(tree, proto_h248, tvb, 0, -1, FALSE);
1200 h248_tree = proto_item_add_subtree(h248_item, ett_h248);
1203 dissect_h248_MegacoMessage(FALSE, tvb, 0, &asn1_ctx, h248_tree, -1);
1208 static void h248_init(void) {
1210 if (!h248_prefs_initialized) {
1211 h248_prefs_initialized = TRUE;
1214 dissector_delete("udp.port", udp_port, h248_handle);
1217 dissector_delete("tcp.port", tcp_port, h248_tpkt_handle);
1220 udp_port = temp_udp_port;
1221 tcp_port = temp_tcp_port;
1224 dissector_add("udp.port", udp_port, h248_handle);
1228 dissector_add("tcp.port", tcp_port, h248_tpkt_handle);
1231 if (!h248_term_handle){
1232 h248_term_handle = find_dissector("h248term");
1237 /*--- proto_register_h248 ----------------------------------------------*/
1238 void proto_register_h248(void) {
1240 /* List of fields */
1241 static hf_register_info hf[] = {
1242 { &hf_h248_mtpaddress_ni, {
1243 "NI", "h248.mtpaddress.ni", FT_UINT32, BASE_DEC,
1244 NULL, 0, "NI", HFILL }},
1245 { &hf_h248_mtpaddress_pc, {
1246 "PC", "h248.mtpaddress.pc", FT_UINT32, BASE_DEC,
1247 NULL, 0, "PC", HFILL }},
1248 { &hf_h248_pkg_name, {
1249 "Package", "h248.package_name", FT_UINT16, BASE_HEX,
1250 VALS(package_name_vals), 0, "Package", HFILL }},
1251 { &hf_248_pkg_param, {
1252 "Parameter ID", "h248.package_paramid", FT_UINT16, BASE_HEX,
1253 NULL, 0, "Parameter ID", HFILL }},
1254 { &hf_h248_signal_code, {
1255 "Signal ID", "h248.package_signalid", FT_UINT16, BASE_HEX,
1256 NULL, 0, "Parameter ID", HFILL }},
1257 { &hf_h248_event_code, {
1258 "Event ID", "h248.package_eventid", FT_UINT16, BASE_HEX,
1259 NULL, 0, "Parameter ID", HFILL }},
1260 { &hf_h248_event_name, {
1261 "Package and Event name", "h248.event_name", FT_UINT32, BASE_HEX,
1262 VALS(event_name_vals), 0, "Package", HFILL }},
1263 { &hf_h248_signal_name, {
1264 "Package and Signal name", "h248.signal_name", FT_UINT32, BASE_HEX,
1265 VALS(signal_name_vals), 0, "Package", HFILL }},
1266 { &hf_h248_pkg_bcp_BNCChar_PDU,
1267 { "BNCChar", "h248.package_bcp.BNCChar",
1268 FT_UINT32, BASE_DEC, VALS(gcp_term_types), 0,
1269 "BNCChar", HFILL }},
1271 { &hf_h248_error_code,
1272 { "errorCode", "h248.errorCode",
1273 FT_UINT32, BASE_DEC, VALS(h248_reasons), 0,
1274 "ErrorDescriptor/errorCode", HFILL }},
1275 { &hf_h248_context_id,
1276 { "contextId", "h248.contextId",
1277 FT_UINT32, BASE_HEX, NULL, 0,
1278 "Context ID", HFILL }},
1279 { &hf_h248_term_wild_type,
1280 { "Wildcard Mode", "h248.term.wildcard.mode",
1281 FT_UINT8, BASE_DEC, VALS(wildcard_modes), 0x80,
1283 { &hf_h248_term_wild_level,
1284 { "Wildcarding Level", "h248.term.wildcard.level",
1285 FT_UINT8, BASE_DEC, VALS(wildcard_levels), 0x40,
1287 { &hf_h248_term_wild_position,
1288 { "Wildcarding Position", "h248.term.wildcard.pos",
1289 FT_UINT8, BASE_DEC, NULL, 0x3F,
1293 { "Unknown Package", "h248.pkg.unknown",
1294 FT_BYTES, BASE_HEX, NULL, 0,
1297 { "Unknown Signal", "h248.pkg.unknown.sig",
1298 FT_BYTES, BASE_HEX, NULL, 0,
1301 { "Unknown Event", "h248.pkg.unknown.evt",
1302 FT_BYTES, BASE_HEX, NULL, 0,
1305 { "Parameter", "h248.pkg.unknown.param",
1306 FT_BYTES, BASE_HEX, NULL, 0,
1308 { &hf_h248_serviceChangeReasonStr,
1309 { "ServiceChangeReasonStr", "h248.serviceChangeReasonstr",
1310 FT_STRING, BASE_NONE, NULL, 0,
1311 "h248.IA5String", HFILL }},
1313 #include "packet-h248-hfarr.c"
1315 GCP_HF_ARR_ELEMS("h248",h248_arrel)
1319 /* List of subtrees */
1320 static gint *ett[] = {
1329 GCP_ETT_ARR_ELEMS(h248_arrel),
1331 #include "packet-h248-ettarr.c"
1334 module_t *h248_module;
1337 /* Register protocol */
1338 proto_h248 = proto_register_protocol(PNAME, PSNAME, PFNAME);
1339 register_dissector("h248", dissect_h248, proto_h248);
1340 register_dissector("h248.tpkt", dissect_h248_tpkt, proto_h248);
1342 /* Register fields and subtrees */
1343 proto_register_field_array(proto_h248, hf, array_length(hf));
1344 proto_register_subtree_array(ett, array_length(ett));
1346 h248_module = prefs_register_protocol(proto_h248, h248_init);
1347 prefs_register_bool_preference(h248_module, "ctx_info",
1349 "Mantain relationships between transactions and contexts and display an extra tree showing context data",
1350 &keep_persistent_data);
1351 prefs_register_uint_preference(h248_module, "udp_port",
1353 "Port to be decoded as h248",
1356 prefs_register_uint_preference(h248_module, "tcp_port",
1358 "Port to be decoded as h248",
1361 prefs_register_bool_preference(h248_module, "desegment",
1362 "Desegment H.248 over TCP",
1363 "Desegment H.248 messages that span more TCP segments",
1367 register_init_routine( &h248_init );
1369 msgs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "h248_msgs");
1370 trxs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "h248_trxs");
1371 ctxs_by_trx = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "h248_ctxs_by_trx");
1372 ctxs = se_tree_create(EMEM_TREE_TYPE_RED_BLACK, "h248_ctxs");
1374 h248_tap = register_tap("h248");
1379 /*--- proto_reg_handoff_h248 -------------------------------------------*/
1380 void proto_reg_handoff_h248(void) {
1382 h248_handle = find_dissector("h248");
1383 h248_tpkt_handle = find_dissector("h248.tpkt");
1385 dissector_add("mtp3.service_indicator", GATEWAY_CONTROL_PROTOCOL_USER_ID, h248_handle);
1386 dissector_add("udp.port", udp_port, h248_handle);
1387 dissector_add("tcp.port", tcp_port, h248_tpkt_handle);