3 * Routines for COAP packet disassembly
4 * draft-ietf-core-coap-07.txt
5 * draft-ietf-core-block-04.txt
6 * draft-ietf-core-observe-02.txt
7 * draft-ietf-core-link-format-06.txt
8 * Shoichi Sakane <sakane@tanu.org>
12 * Wireshark - Network traffic analyzer
13 * By Gerald Combs <gerald@wireshark.org>
14 * Copyright 1998 Gerald Combs
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version 2
19 * of the License, or (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
37 #include <epan/packet.h>
38 #include <epan/prefs.h>
41 static dissector_table_t media_type_dissector_table;
43 static int proto_coap = -1;
45 static int hf_coap_version = -1;
46 static int hf_coap_ttype = -1;
47 static int hf_coap_opt_count = -1;
48 static int hf_coap_code = -1;
49 static int hf_coap_tid = -1;
50 static int hf_coap_opt_delta = -1;
51 static int hf_coap_opt_length = -1;
52 static int hf_coap_opt_ctype = -1;
53 static int hf_coap_opt_max_age = -1;
54 static int hf_coap_opt_proxy_uri = -1;
55 static int hf_coap_opt_etag = -1;
56 static int hf_coap_opt_uri_host = -1;
57 static int hf_coap_opt_location_path = -1;
58 static int hf_coap_opt_uri_port = -1;
59 static int hf_coap_opt_location_query = -1;
60 static int hf_coap_opt_uri_path = -1;
61 static int hf_coap_opt_observe = -1;
62 static int hf_coap_opt_token = -1;
63 static int hf_coap_opt_accept = -1;
64 static int hf_coap_opt_if_match = -1;
65 static int hf_coap_opt_block_number = -1;
66 static int hf_coap_opt_block_mflag = -1;
67 static int hf_coap_opt_block_size = -1;
68 static int hf_coap_opt_uri_query = -1;
69 static int hf_coap_opt_if_none_match = -1;
71 static gint ett_coap = -1;
72 static gint ett_coap_option = -1;
73 static gint ett_coap_payload = -1;
75 /* COAP's IANA-assigned port number */
76 #define DEFAULT_COAP_PORT 5683
78 static const gchar *coap_content_type = NULL;
79 static gint coap_content_type_value = ~0;
80 static guint global_coap_port_number = DEFAULT_COAP_PORT;
82 static gint block_number = ~0;
83 static guint block_mflag = 0;
84 static gchar uri_string[256]; /* 256 is probably enough to display in the screen */
89 static const value_string vals_ttype[] = {
91 { 1, "Non-Confirmable" },
92 { 2, "Acknowledgement" },
101 static const value_string vals_code[] = {
102 { 0, "Empty Message" },
111 { 65, "2.01 Created" },
112 { 66, "2.02 Deleted" },
113 { 67, "2.03 Valid" },
114 { 68, "2.04 Changed" },
115 { 69, "2.05 Content" },
116 { 128, "4.00 Bad Request" },
117 { 129, "4.01 Unauthorized" },
118 { 130, "4.02 Bad Option" },
119 { 131, "4.03 Forbidden" },
120 { 132, "4.04 Not Found" },
121 { 133, "4.05 Method Not Allowed" },
122 { 136, "4.08 Request Entity Incomplete" }, /* core-block-03 */
123 { 140, "4.12 Precondition Failed" },
124 { 141, "4.13 Request Entity Too Large" },
125 { 143, "4.15 Unsupported Media Type" },
126 { 160, "5.00 Internal Server Error" },
127 { 161, "5.01 Not Implemented" },
128 { 162, "5.02 Bad Gateway" },
129 { 163, "5.03 Service Unavailable" },
130 { 164, "5.04 Gateway Timeout" },
131 { 165, "5.05 Proxying Not Supported" },
138 * No-Option must not be included in this structure, is handled in the function
139 * of the dissector, especially.
141 #define COAP_OPT_CONTENT_TYPE 1
142 #define COAP_OPT_MAX_AGE 2
143 #define COAP_OPT_PROXY_URI 3
144 #define COAP_OPT_ETAG 4
145 #define COAP_OPT_URI_HOST 5
146 #define COAP_OPT_LOCATION_PATH 6
147 #define COAP_OPT_URI_PORT 7
148 #define COAP_OPT_LOCATION_QUERY 8
149 #define COAP_OPT_URI_PATH 9
150 #define COAP_OPT_OBSERVE 10 /* core-observe */
151 #define COAP_OPT_TOKEN 11
152 #define COAP_OPT_ACCEPT 12
153 #define COAP_OPT_IF_MATCH 13
154 #define COAP_OPT_URI_QUERY 15
155 #define COAP_OPT_BLOCK2 17 /* core-block-03 */
156 #define COAP_OPT_BLOCK1 19 /* core-block-03 */
157 #define COAP_OPT_IF_NONE_MATCH 21
159 static const value_string vals_opt_type[] = {
160 { COAP_OPT_CONTENT_TYPE, "Content-Type" },
161 { COAP_OPT_MAX_AGE, "Max-age" },
162 { COAP_OPT_PROXY_URI, "Proxy-Uri" },
163 { COAP_OPT_ETAG, "Etag" },
164 { COAP_OPT_URI_HOST, "Uri-Host" },
165 { COAP_OPT_LOCATION_PATH, "Location-Path" },
166 { COAP_OPT_URI_PORT, "Uri-Port" },
167 { COAP_OPT_LOCATION_QUERY, "Location-Query" },
168 { COAP_OPT_URI_PATH, "Uri-Path" },
169 { COAP_OPT_OBSERVE, "Observe" },
170 { COAP_OPT_TOKEN, "Token" },
171 { COAP_OPT_ACCEPT, "Accept" },
172 { COAP_OPT_IF_MATCH, "If-Match" },
173 { COAP_OPT_URI_QUERY, "Uri-Query" },
174 { COAP_OPT_BLOCK2, "Block2" },
175 { COAP_OPT_BLOCK1, "Block1" },
176 { COAP_OPT_IF_NONE_MATCH, "If-None-Match" },
180 static const value_string vals_ctype[] = {
182 { 40, "application/link-format" },
183 { 41, "application/xml" },
184 { 42, "application/octet-stream" },
185 { 47, "application/exi" },
186 { 50, "application/json" },
190 void proto_reg_handoff_coap(void);
193 coap_is_str_ipv6addr(guint8 *str)
195 size_t len = strlen(str);
203 return colon > 1 ? 1 : 0;
207 dissect_coap_opt_string(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *subtree, gint offset, gint opt_length, int hfindex, int opt_code)
209 guint8 *hoststr = NULL;
211 proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, FALSE);
213 /* forming a uri-string */
215 case COAP_OPT_URI_HOST:
216 g_strlcat(uri_string, "coap://", sizeof(uri_string));
217 hoststr = tvb_get_ephemeral_string(tvb, offset, opt_length);
218 /* if the string looks an IPv6 address, it has to be enclosed by brackets. */
219 if (coap_is_str_ipv6addr(hoststr)) {
220 g_strlcat(uri_string, "[", sizeof(uri_string));
221 g_strlcat(uri_string, hoststr, sizeof(uri_string));
222 g_strlcat(uri_string, "]", sizeof(uri_string));
224 g_strlcat(uri_string, hoststr, sizeof(uri_string));
226 case COAP_OPT_URI_PATH:
227 g_strlcat(uri_string, "/", sizeof(uri_string));
228 g_strlcat(uri_string, tvb_get_ephemeral_string(tvb, offset, opt_length), sizeof(uri_string));
230 case COAP_OPT_URI_QUERY:
231 g_strlcat(uri_string, "/?", sizeof(uri_string));
232 g_strlcat(uri_string, tvb_get_ephemeral_string(tvb, offset, opt_length), sizeof(uri_string));
238 dissect_coap_opt_ctype(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
240 guint32 opt_ctype = 0;
242 if (opt_length != 1) {
243 expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
247 opt_ctype = tvb_get_guint8(tvb, offset);
248 coap_content_type_value = (gint)opt_ctype;
249 coap_content_type = val_to_str(opt_ctype, vals_ctype, "Unknown %d");
251 proto_tree_add_item(subtree, hfindex, tvb, offset, 1, FALSE);
255 dissect_coap_opt_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
257 proto_item *item = NULL;
259 if (opt_length <= 0 || opt_length > 4) {
260 expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
264 item = proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, FALSE);
265 proto_item_append_text(item, " (s)");
271 dissect_coap_opt_block(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
274 guint encoded_block_size = 0;
276 proto_item *item = NULL;
278 switch (opt_length) {
280 block_number = (guint)(tvb_get_guint8(tvb, offset) >> 4);
283 block_number = (guint)(tvb_get_ntohs(tvb, offset) >> 4);
286 block_number = (guint)(tvb_get_ntoh24(tvb, offset) >> 4);
289 expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
293 val = tvb_get_guint8(tvb, offset + opt_length - 1) & 0x0f;
294 encoded_block_size = val & 0x07;
295 block_mflag = val & 0x08;
297 proto_tree_add_int(subtree, hf_coap_opt_block_number, tvb, offset, opt_length, block_number);
298 proto_tree_add_item(subtree, hfindex, tvb, offset + opt_length - 1, 1, FALSE);
300 block_size = 1 << (encoded_block_size + 4);
301 item = proto_tree_add_item(subtree, hf_coap_opt_block_size, tvb, offset + opt_length - 1, 1, ENC_BIG_ENDIAN);
302 proto_item_append_text(item, ", Result: %d", block_size);
306 dissect_coap_opt_port(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
308 proto_item *item = NULL;
311 memset(portstr, '\0', sizeof(portstr));
313 switch (opt_length) {
315 item = proto_tree_add_uint(subtree, hfindex, tvb, offset, opt_length, pinfo->destport);
316 proto_item_append_text(item, " (default)");
319 g_snprintf(portstr, sizeof(portstr), "%u", tvb_get_guint8(tvb, offset));
322 g_snprintf(portstr, sizeof(portstr), "%u", tvb_get_ntohs(tvb, offset));
325 expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
328 (void)proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, FALSE);
330 /* forming a uri-string */
331 if (uri_string[0] == '\0')
332 g_strlcat(uri_string, ep_address_to_str(&pinfo->net_dst), sizeof(uri_string));
333 g_strlcat(uri_string, ":", sizeof(uri_string));
334 g_strlcat(uri_string, portstr, sizeof(uri_string));
340 * dissector for each option of COAP.
341 * return the total length of the option including the header (e.g. delta and length).
344 dissect_coap_options(tvbuff_t *tvb, packet_info *pinfo, proto_tree *coap_tree, gint offset, guint8 opt_count, guint8 *opt_code)
348 proto_tree *subtree = NULL;
349 proto_item *item = NULL;
351 tvbuff_t *tvb_lenbuf = NULL;
353 opt_delta = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
354 *opt_code += opt_delta;
358 * Normally Length is a 4-bit unsigned integer
359 * allowing values of 0-14 octets. When the length is 15 or more,
360 * another byte is added as an 8-bit unsigned integer plus 15
361 * allowing values of 15-270 octets.
363 opt_length = (tvb_get_guint8(tvb, offset) & 0x0f);
365 if (opt_length == 0x0f) {
366 opt_length += tvb_get_guint8(tvb, offset + 1);
370 item = proto_tree_add_text(coap_tree, tvb, offset, opt_hlen + opt_length,
371 "Option #%u: %s (Type: %u)",
372 opt_count, val_to_str(*opt_code, vals_opt_type, *opt_code % 14 == 0 ? "No-Op" : "Unknown Option"), *opt_code);
374 subtree = proto_item_add_subtree(item, ett_coap_option);
375 proto_tree_add_item(subtree, hf_coap_opt_delta, tvb, offset, 1, ENC_BIG_ENDIAN);
377 tvb_lenbuf = tvb_new_subset(tvb, offset, opt_hlen, opt_hlen);
378 proto_tree_add_uint_bits_format_value(subtree, hf_coap_opt_length, tvb_lenbuf, 4, opt_hlen == 1 ? 4 : 12, opt_length, "%d", opt_length);
382 case COAP_OPT_CONTENT_TYPE:
383 dissect_coap_opt_ctype(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_ctype);
385 case COAP_OPT_MAX_AGE:
386 dissect_coap_opt_time(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_max_age);
388 case COAP_OPT_PROXY_URI:
389 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_proxy_uri, COAP_OPT_PROXY_URI);
392 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_etag, COAP_OPT_ETAG);
394 case COAP_OPT_URI_HOST:
395 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_host, COAP_OPT_URI_HOST);
397 case COAP_OPT_LOCATION_PATH:
398 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_location_path, COAP_OPT_LOCATION_PATH);
400 case COAP_OPT_URI_PORT:
401 dissect_coap_opt_port(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_port);
403 case COAP_OPT_LOCATION_QUERY:
404 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_location_query, COAP_OPT_LOCATION_QUERY);
406 case COAP_OPT_URI_PATH:
407 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_path, COAP_OPT_URI_PATH);
409 case COAP_OPT_OBSERVE:
410 dissect_coap_opt_time(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_observe);
413 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_token, COAP_OPT_TOKEN);
415 case COAP_OPT_ACCEPT:
416 dissect_coap_opt_ctype(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_accept);
418 case COAP_OPT_IF_MATCH:
419 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_if_match, COAP_OPT_IF_MATCH);
421 case COAP_OPT_URI_QUERY:
422 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_query, COAP_OPT_URI_QUERY);
424 case COAP_OPT_BLOCK2:
425 dissect_coap_opt_block(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_block_mflag);
427 case COAP_OPT_BLOCK1:
428 dissect_coap_opt_block(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_block_mflag);
430 case COAP_OPT_IF_NONE_MATCH:
431 dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_if_none_match, COAP_OPT_IF_NONE_MATCH);
434 /* In case of unknown opt_code, just ignore it here. A message is displayed beforehand. */
438 return offset + opt_length;
442 dissect_coap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
445 proto_item *coap_root = NULL;
446 proto_tree *coap_tree = NULL;
448 guint8 opt_count = 0;
451 guint coap_length = 0;
455 col_set_str(pinfo->cinfo, COL_PROTOCOL, "COAP");
456 col_clear(pinfo->cinfo, COL_INFO);
461 /* initialize the COAP length and the content-type */
463 * the length of COAP message is not specified in the COAP header.
464 * It has to be from the lower layer. the iplen of packet_info is not accurate.
465 * Currently, the length is just copied from the reported length of the tvbuffer.
467 coap_length = tvb_reported_length(tvb);
468 coap_content_type = NULL;
469 coap_content_type_value = ~0;
471 coap_root = proto_tree_add_item(parent_tree, proto_coap, tvb, offset, -1, ENC_NA);
472 coap_tree = proto_item_add_subtree(coap_root, ett_coap);
474 proto_tree_add_item(coap_tree, hf_coap_version, tvb, offset, 1, ENC_BIG_ENDIAN);
476 proto_tree_add_item(coap_tree, hf_coap_ttype, tvb, offset, 1, ENC_BIG_ENDIAN);
477 ttype = (tvb_get_guint8(tvb, offset) & 0x30) >> 4;
478 col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(ttype, vals_ttype, "Unknown %d"));
480 proto_tree_add_item(coap_tree, hf_coap_opt_count, tvb, offset, 1, ENC_BIG_ENDIAN);
481 opt_count = tvb_get_guint8(tvb, offset) & 0x0f;
484 proto_tree_add_item(coap_tree, hf_coap_code, tvb, offset, 1, ENC_BIG_ENDIAN);
485 code = tvb_get_guint8(tvb, offset);
486 col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", val_to_str(code, vals_code, "Unknown %d"));
489 proto_tree_add_item(coap_tree, hf_coap_tid, tvb, offset, 2, ENC_BIG_ENDIAN);
490 tid = tvb_get_ntohs(tvb, offset);
493 /* append the header information */
494 proto_item_append_text(coap_tree, ", TID: %u, Length: %u", tid, coap_length);
496 /* initialize the external value */
501 /* dissect the options */
502 for (i = 1; i <= opt_count; i++) {
503 offset = dissect_coap_options(tvb, pinfo, coap_tree, offset, i, &opt_code);
504 if (coap_length < offset) {
506 proto_tree_add_text(coap_tree, tvb, 0, 0, "Invalid length: coap_length(%d) < offset(%d)", coap_length, offset);
510 if (block_number != ~0) {
511 col_append_fstr(pinfo->cinfo, COL_INFO, ", %sBlock #%d", block_mflag ? "" : "End of ", block_number);
513 if (uri_string[0] != '\0') {
514 col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", uri_string);
517 /* dissect the payload */
518 if (coap_length > offset) {
519 proto_tree *payload_tree = NULL;
520 proto_item *payload_item = NULL;
521 tvbuff_t *payload_tvb;
522 guint payload_length = coap_length - offset;
523 char *ctype_str_default = "";
526 * TODO: should the content type be canonicalized ?
527 * currently assuming it be small.
529 if (coap_content_type_value == ~0) {
530 /* default: coap-02 section 3.2.1 */
531 coap_content_type = "text/plain";
532 ctype_str_default = " (default)";
535 payload_item = proto_tree_add_text(coap_tree, tvb, offset, -1, "Payload Content-Type: %s%s, Length: %u, offset: %u",
536 coap_content_type, ctype_str_default, payload_length, offset);
537 payload_tree = proto_item_add_subtree(payload_item, ett_coap_payload);
538 payload_tvb = tvb_new_subset(tvb, offset, payload_length, payload_length);
540 dissector_try_string(media_type_dissector_table, coap_content_type, payload_tvb, pinfo, payload_tree);
545 * Protocol initialization
548 proto_register_coap(void)
550 static hf_register_info hf[] = {
551 { &hf_coap_version, { "Version", "coap.version", FT_UINT8, BASE_DEC, NULL, 0xc0, "COAP Version", HFILL }},
552 { &hf_coap_ttype, { "Type", "coap.type", FT_UINT8, BASE_DEC, VALS(vals_ttype), 0x30, "COAP Transaction Type", HFILL }},
553 { &hf_coap_opt_count, { "Option Count", "coap.optcount", FT_UINT8, BASE_DEC, NULL, 0x0f, "COAP Option Count", HFILL }},
554 { &hf_coap_code, { "Code", "coap.code", FT_UINT8, BASE_DEC, VALS(vals_code), 0x0, "COAP Method or Response Code", HFILL }},
555 { &hf_coap_tid, { "Transaction ID", "coap.tid", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Transaction ID", HFILL }},
556 { &hf_coap_opt_delta, { "Delta", "coap.opt.delta", FT_UINT8, BASE_DEC, NULL, 0xf0, "COAP Option Delta", HFILL }},
557 { &hf_coap_opt_length, { "Length", "coap.opt.length", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Option Length", HFILL }},
558 { &hf_coap_opt_ctype, { "Content-type", "coap.opt.ctype", FT_UINT8, BASE_DEC, VALS(vals_ctype), 0x0, "COAP Content Type", HFILL }},
559 { &hf_coap_opt_max_age, { "Max-age", "coap.opt.max_age", FT_UINT32, BASE_DEC, NULL, 0x0, "COAP Max-age", HFILL }},
560 { &hf_coap_opt_proxy_uri, { "Proxy-Uri", "coap.opt.proxy_uri", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Proxy-Uri", HFILL }},
561 { &hf_coap_opt_etag, { "Etag", "coap.opt.etag", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP Etag", HFILL }},
562 { &hf_coap_opt_uri_host, { "Uri-Host", "coap.opt.uri_host", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Host", HFILL }},
563 { &hf_coap_opt_location_path, { "Location-Path", "coap.opt.location_path", FT_STRING, BASE_NONE, NULL, 0x0, "COAP URI Path", HFILL }},
564 { &hf_coap_opt_uri_port, { "Uri-Port", "coap.opt.uri_port", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Uri-Port", HFILL }},
565 { &hf_coap_opt_location_query, { "Location-Query", "coap.opt.location_query", FT_STRING, BASE_NONE, NULL, 0x0, "COAP URI Query", HFILL }},
566 { &hf_coap_opt_uri_path, { "Uri-Path", "coap.opt.uri_path", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Path", HFILL }},
567 { &hf_coap_opt_observe, { "Lifetime", "coap.opt.subscr_lifetime", FT_INT32, BASE_DEC, NULL, 0x0, "COAP Observe", HFILL }},
568 { &hf_coap_opt_token, { "Token", "coap.opt.token", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP Token", HFILL }},
569 { &hf_coap_opt_accept, { "Accept", "coap.opt.accept", FT_UINT8, BASE_DEC, VALS(vals_ctype), 0x0, "COAP Acceptable Content Type", HFILL }},
570 { &hf_coap_opt_if_match, { "If-Match", "coap.opt.if_match", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP If-Match", HFILL }},
571 { &hf_coap_opt_block_number, { "Block Number", "coap.opt.block_number", FT_INT32, BASE_DEC, NULL, 0x0, "COAP Block Number", HFILL }},
572 { &hf_coap_opt_block_mflag, { "More Flag", "coap.opt.block_mflag", FT_UINT8, BASE_DEC, NULL, 0x08, "COAP Block More Size", HFILL }},
573 { &hf_coap_opt_block_size, { "Encoded Block Size", "coap.opt.block_size", FT_UINT8, BASE_DEC, NULL, 0x07, "COAP Encoded Block Size", HFILL }},
574 { &hf_coap_opt_uri_query, { "Uri-Query", "coap.opt.uri_query", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Query", HFILL }},
575 { &hf_coap_opt_if_none_match, { "If-None-Match", "coap.opt.if_none_match", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP If-None-Match", HFILL }},
578 static gint *ett[] = {
584 module_t *coap_module;
586 proto_coap = proto_register_protocol("Constrained Application Protocol", "COAP", "coap");
587 proto_register_field_array(proto_coap, hf, array_length(hf));
588 proto_register_subtree_array(ett, array_length(ett));
590 register_dissector("coap", dissect_coap, proto_coap);
592 /* Register our configuration options */
593 coap_module = prefs_register_protocol (proto_coap, proto_reg_handoff_coap);
595 prefs_register_uint_preference (coap_module, "udp_port",
597 "Port number used for COAP traffic",
598 10, &global_coap_port_number);
602 proto_reg_handoff_coap(void)
604 static gboolean coap_prefs_initialized = FALSE;
605 static dissector_handle_t coap_handle;
606 static guint coap_port_number;
608 if (!coap_prefs_initialized) {
609 coap_handle = find_dissector("coap");
610 media_type_dissector_table = find_dissector_table("media_type");
611 coap_prefs_initialized = TRUE;
613 dissector_delete_uint("udp.port", coap_port_number, coap_handle);
614 dissector_delete_uint("tcp.port", coap_port_number, coap_handle);
617 coap_port_number = global_coap_port_number;
618 dissector_add_uint("udp.port", coap_port_number, coap_handle);
619 dissector_add_uint("tcp.port", coap_port_number, coap_handle);