forked from osmocom/wireshark
![Bill Meier](/assets/img/avatar_default.png)
In some files: Remove a few unneeded #includes; Do some whitespace/indentation cleanup svn path=/trunk/; revision=39635
621 lines
22 KiB
C
621 lines
22 KiB
C
#include <stdio.h>
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/* packet-coap.c
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* Routines for COAP packet disassembly
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* draft-ietf-core-coap-07.txt
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* draft-ietf-core-block-04.txt
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* draft-ietf-core-observe-02.txt
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* draft-ietf-core-link-format-06.txt
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* Shoichi Sakane <sakane@tanu.org>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <expert.h>
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static dissector_table_t media_type_dissector_table;
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static int proto_coap = -1;
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static int hf_coap_version = -1;
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static int hf_coap_ttype = -1;
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static int hf_coap_opt_count = -1;
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static int hf_coap_code = -1;
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static int hf_coap_tid = -1;
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static int hf_coap_opt_delta = -1;
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static int hf_coap_opt_length = -1;
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static int hf_coap_opt_ctype = -1;
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static int hf_coap_opt_max_age = -1;
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static int hf_coap_opt_proxy_uri = -1;
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static int hf_coap_opt_etag = -1;
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static int hf_coap_opt_uri_host = -1;
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static int hf_coap_opt_location_path = -1;
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static int hf_coap_opt_uri_port = -1;
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static int hf_coap_opt_location_query = -1;
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static int hf_coap_opt_uri_path = -1;
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static int hf_coap_opt_observe = -1;
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static int hf_coap_opt_token = -1;
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static int hf_coap_opt_accept = -1;
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static int hf_coap_opt_if_match = -1;
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static int hf_coap_opt_block_number = -1;
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static int hf_coap_opt_block_mflag = -1;
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static int hf_coap_opt_block_size = -1;
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static int hf_coap_opt_uri_query = -1;
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static int hf_coap_opt_if_none_match = -1;
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static gint ett_coap = -1;
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static gint ett_coap_option = -1;
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static gint ett_coap_payload = -1;
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/* COAP's IANA-assigned port number */
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#define DEFAULT_COAP_PORT 5683
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static const gchar *coap_content_type = NULL;
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static gint coap_content_type_value = ~0;
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static guint global_coap_port_number = DEFAULT_COAP_PORT;
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static gint block_number = ~0;
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static guint block_mflag = 0;
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static gchar uri_string[256]; /* 256 is probably enough to display in the screen */
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/*
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* Transaction Type
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*/
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static const value_string vals_ttype[] = {
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{ 0, "Confirmable" },
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{ 1, "Non-Confirmable" },
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{ 2, "Acknowledgement" },
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{ 3, "Reset" },
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{ 0, NULL },
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};
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/*
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* Method Code
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* Response Code
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*/
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static const value_string vals_code[] = {
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{ 0, "Empty Message" },
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/* method code */
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{ 1, "GET" },
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{ 2, "POST" },
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{ 3, "PUT" },
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{ 4, "DELETE" },
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/* response code */
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{ 65, "2.01 Created" },
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{ 66, "2.02 Deleted" },
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{ 67, "2.03 Valid" },
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{ 68, "2.04 Changed" },
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{ 69, "2.05 Content" },
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{ 128, "4.00 Bad Request" },
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{ 129, "4.01 Unauthorized" },
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{ 130, "4.02 Bad Option" },
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{ 131, "4.03 Forbidden" },
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{ 132, "4.04 Not Found" },
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{ 133, "4.05 Method Not Allowed" },
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{ 136, "4.08 Request Entity Incomplete" }, /* core-block-03 */
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{ 140, "4.12 Precondition Failed" },
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{ 141, "4.13 Request Entity Too Large" },
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{ 143, "4.15 Unsupported Media Type" },
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{ 160, "5.00 Internal Server Error" },
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{ 161, "5.01 Not Implemented" },
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{ 162, "5.02 Bad Gateway" },
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{ 163, "5.03 Service Unavailable" },
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{ 164, "5.04 Gateway Timeout" },
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{ 165, "5.05 Proxying Not Supported" },
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{ 0, NULL },
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};
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/*
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* Option Headers
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* No-Option must not be included in this structure, is handled in the function
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* of the dissector, especially.
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*/
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#define COAP_OPT_CONTENT_TYPE 1
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#define COAP_OPT_MAX_AGE 2
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#define COAP_OPT_PROXY_URI 3
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#define COAP_OPT_ETAG 4
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#define COAP_OPT_URI_HOST 5
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#define COAP_OPT_LOCATION_PATH 6
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#define COAP_OPT_URI_PORT 7
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#define COAP_OPT_LOCATION_QUERY 8
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#define COAP_OPT_URI_PATH 9
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#define COAP_OPT_OBSERVE 10 /* core-observe */
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#define COAP_OPT_TOKEN 11
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#define COAP_OPT_ACCEPT 12
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#define COAP_OPT_IF_MATCH 13
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#define COAP_OPT_URI_QUERY 15
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#define COAP_OPT_BLOCK2 17 /* core-block-03 */
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#define COAP_OPT_BLOCK1 19 /* core-block-03 */
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#define COAP_OPT_IF_NONE_MATCH 21
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static const value_string vals_opt_type[] = {
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{ COAP_OPT_CONTENT_TYPE, "Content-Type" },
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{ COAP_OPT_MAX_AGE, "Max-age" },
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{ COAP_OPT_PROXY_URI, "Proxy-Uri" },
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{ COAP_OPT_ETAG, "Etag" },
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{ COAP_OPT_URI_HOST, "Uri-Host" },
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{ COAP_OPT_LOCATION_PATH, "Location-Path" },
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{ COAP_OPT_URI_PORT, "Uri-Port" },
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{ COAP_OPT_LOCATION_QUERY, "Location-Query" },
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{ COAP_OPT_URI_PATH, "Uri-Path" },
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{ COAP_OPT_OBSERVE, "Observe" },
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{ COAP_OPT_TOKEN, "Token" },
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{ COAP_OPT_ACCEPT, "Accept" },
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{ COAP_OPT_IF_MATCH, "If-Match" },
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{ COAP_OPT_URI_QUERY, "Uri-Query" },
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{ COAP_OPT_BLOCK2, "Block2" },
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{ COAP_OPT_BLOCK1, "Block1" },
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{ COAP_OPT_IF_NONE_MATCH, "If-None-Match" },
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{ 0, NULL },
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};
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static const value_string vals_ctype[] = {
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{ 0, "text/plain" },
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{ 40, "application/link-format" },
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{ 41, "application/xml" },
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{ 42, "application/octet-stream" },
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{ 47, "application/exi" },
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{ 50, "application/json" },
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{ 0, NULL },
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};
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void proto_reg_handoff_coap(void);
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static int
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coap_is_str_ipv6addr(guint8 *str)
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{
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size_t len = strlen(str);
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int colon = 0;
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while (len--) {
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if (*str++ == ':')
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colon++;
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}
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return colon > 1 ? 1 : 0;
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}
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static void
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dissect_coap_opt_string(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *subtree, gint offset, gint opt_length, int hfindex, int opt_code)
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{
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guint8 *hoststr = NULL;
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proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, FALSE);
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/* forming a uri-string */
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switch (opt_code) {
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case COAP_OPT_URI_HOST:
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g_strlcat(uri_string, "coap://", sizeof(uri_string));
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hoststr = tvb_get_ephemeral_string(tvb, offset, opt_length);
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/* if the string looks an IPv6 address, it has to be enclosed by brackets. */
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if (coap_is_str_ipv6addr(hoststr)) {
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g_strlcat(uri_string, "[", sizeof(uri_string));
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g_strlcat(uri_string, hoststr, sizeof(uri_string));
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g_strlcat(uri_string, "]", sizeof(uri_string));
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} else
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g_strlcat(uri_string, hoststr, sizeof(uri_string));
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break;
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case COAP_OPT_URI_PATH:
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g_strlcat(uri_string, "/", sizeof(uri_string));
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g_strlcat(uri_string, tvb_get_ephemeral_string(tvb, offset, opt_length), sizeof(uri_string));
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break;
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case COAP_OPT_URI_QUERY:
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g_strlcat(uri_string, "/?", sizeof(uri_string));
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g_strlcat(uri_string, tvb_get_ephemeral_string(tvb, offset, opt_length), sizeof(uri_string));
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break;
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}
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}
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static void
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dissect_coap_opt_ctype(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
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{
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guint32 opt_ctype = 0;
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if (opt_length != 1) {
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expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
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return;
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}
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opt_ctype = tvb_get_guint8(tvb, offset);
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coap_content_type_value = (gint)opt_ctype;
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coap_content_type = val_to_str(opt_ctype, vals_ctype, "Unknown %d");
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proto_tree_add_item(subtree, hfindex, tvb, offset, 1, ENC_BIG_ENDIAN);
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}
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static void
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dissect_coap_opt_time(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
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{
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proto_item *item = NULL;
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if (opt_length <= 0 || opt_length > 4) {
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expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
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return;
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}
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item = proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, ENC_BIG_ENDIAN);
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proto_item_append_text(item, " (s)");
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return;
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}
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static void
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dissect_coap_opt_block(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
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{
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guint8 val = 0;
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guint encoded_block_size = 0;
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guint block_size;
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proto_item *item = NULL;
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switch (opt_length) {
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case 1:
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block_number = (guint)(tvb_get_guint8(tvb, offset) >> 4);
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break;
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case 2:
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block_number = (guint)(tvb_get_ntohs(tvb, offset) >> 4);
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break;
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case 3:
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block_number = (guint)(tvb_get_ntoh24(tvb, offset) >> 4);
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break;
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default:
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expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
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return;
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}
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val = tvb_get_guint8(tvb, offset + opt_length - 1) & 0x0f;
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encoded_block_size = val & 0x07;
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block_mflag = val & 0x08;
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proto_tree_add_int(subtree, hf_coap_opt_block_number, tvb, offset, opt_length, block_number);
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proto_tree_add_item(subtree, hfindex, tvb, offset + opt_length - 1, 1, ENC_BIG_ENDIAN);
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block_size = 1 << (encoded_block_size + 4);
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item = proto_tree_add_item(subtree, hf_coap_opt_block_size, tvb, offset + opt_length - 1, 1, ENC_BIG_ENDIAN);
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proto_item_append_text(item, ", Result: %d", block_size);
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}
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static void
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dissect_coap_opt_port(tvbuff_t *tvb, packet_info *pinfo, proto_tree *subtree, gint offset, gint opt_length, int hfindex)
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{
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proto_item *item = NULL;
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char portstr[6];
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memset(portstr, '\0', sizeof(portstr));
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switch (opt_length) {
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case 0:
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item = proto_tree_add_uint(subtree, hfindex, tvb, offset, opt_length, pinfo->destport);
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proto_item_append_text(item, " (default)");
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return;
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case 1:
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g_snprintf(portstr, sizeof(portstr), "%u", tvb_get_guint8(tvb, offset));
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break;
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case 2:
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g_snprintf(portstr, sizeof(portstr), "%u", tvb_get_ntohs(tvb, offset));
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break;
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default:
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expert_add_info_format(pinfo, subtree, PI_MALFORMED, PI_WARN, "Invalid Option Length: %d", opt_length);
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return;
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}
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(void)proto_tree_add_item(subtree, hfindex, tvb, offset, opt_length, ENC_BIG_ENDIAN);
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/* forming a uri-string */
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if (uri_string[0] == '\0')
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g_strlcat(uri_string, ep_address_to_str(&pinfo->net_dst), sizeof(uri_string));
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g_strlcat(uri_string, ":", sizeof(uri_string));
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g_strlcat(uri_string, portstr, sizeof(uri_string));
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return;
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}
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/*
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* dissector for each option of COAP.
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* return the total length of the option including the header (e.g. delta and length).
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*/
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static int
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dissect_coap_options(tvbuff_t *tvb, packet_info *pinfo, proto_tree *coap_tree, gint offset, guint8 opt_count, guint8 *opt_code)
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{
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guint8 opt_delta;
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gint opt_length;
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proto_tree *subtree = NULL;
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proto_item *item = NULL;
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gint opt_hlen = 0;
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tvbuff_t *tvb_lenbuf = NULL;
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opt_delta = (tvb_get_guint8(tvb, offset) & 0xf0) >> 4;
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*opt_code += opt_delta;
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/*
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* Length:
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* Normally Length is a 4-bit unsigned integer
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* allowing values of 0-14 octets. When the length is 15 or more,
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* another byte is added as an 8-bit unsigned integer plus 15
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* allowing values of 15-270 octets.
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*/
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opt_length = (tvb_get_guint8(tvb, offset) & 0x0f);
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opt_hlen = 1;
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if (opt_length == 0x0f) {
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opt_length += tvb_get_guint8(tvb, offset + 1);
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opt_hlen = 2;
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}
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item = proto_tree_add_text(coap_tree, tvb, offset, opt_hlen + opt_length,
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"Option #%u: %s (Type: %u)",
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opt_count, val_to_str(*opt_code, vals_opt_type, *opt_code % 14 == 0 ? "No-Op" : "Unknown Option"), *opt_code);
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subtree = proto_item_add_subtree(item, ett_coap_option);
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proto_tree_add_item(subtree, hf_coap_opt_delta, tvb, offset, 1, ENC_BIG_ENDIAN);
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tvb_lenbuf = tvb_new_subset(tvb, offset, opt_hlen, opt_hlen);
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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);
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offset += opt_hlen;
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switch (*opt_code) {
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case COAP_OPT_CONTENT_TYPE:
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dissect_coap_opt_ctype(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_ctype);
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break;
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case COAP_OPT_MAX_AGE:
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dissect_coap_opt_time(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_max_age);
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break;
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case COAP_OPT_PROXY_URI:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_proxy_uri, COAP_OPT_PROXY_URI);
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break;
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case COAP_OPT_ETAG:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_etag, COAP_OPT_ETAG);
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break;
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case COAP_OPT_URI_HOST:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_host, COAP_OPT_URI_HOST);
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break;
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case COAP_OPT_LOCATION_PATH:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_location_path, COAP_OPT_LOCATION_PATH);
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break;
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case COAP_OPT_URI_PORT:
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dissect_coap_opt_port(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_port);
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break;
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case COAP_OPT_LOCATION_QUERY:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_location_query, COAP_OPT_LOCATION_QUERY);
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break;
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case COAP_OPT_URI_PATH:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_path, COAP_OPT_URI_PATH);
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break;
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case COAP_OPT_OBSERVE:
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dissect_coap_opt_time(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_observe);
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break;
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case COAP_OPT_TOKEN:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_token, COAP_OPT_TOKEN);
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break;
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case COAP_OPT_ACCEPT:
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dissect_coap_opt_ctype(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_accept);
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break;
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case COAP_OPT_IF_MATCH:
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dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_if_match, COAP_OPT_IF_MATCH);
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break;
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case COAP_OPT_URI_QUERY:
|
|
dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_uri_query, COAP_OPT_URI_QUERY);
|
|
break;
|
|
case COAP_OPT_BLOCK2:
|
|
dissect_coap_opt_block(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_block_mflag);
|
|
break;
|
|
case COAP_OPT_BLOCK1:
|
|
dissect_coap_opt_block(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_block_mflag);
|
|
break;
|
|
case COAP_OPT_IF_NONE_MATCH:
|
|
dissect_coap_opt_string(tvb, pinfo, subtree, offset, opt_length, hf_coap_opt_if_none_match, COAP_OPT_IF_NONE_MATCH);
|
|
break;
|
|
default:
|
|
/* In case of unknown opt_code, just ignore it here. A message is displayed beforehand. */
|
|
break;
|
|
}
|
|
|
|
return offset + opt_length;
|
|
}
|
|
|
|
static void
|
|
dissect_coap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
|
|
{
|
|
guint offset = 0;
|
|
proto_item *coap_root = NULL;
|
|
proto_tree *coap_tree = NULL;
|
|
guint8 ttype = 0;
|
|
guint8 opt_count = 0;
|
|
guint8 code = 0;
|
|
guint16 tid = 0;
|
|
guint coap_length = 0;
|
|
guint8 opt_code = 0;
|
|
int i;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "COAP");
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
if (!parent_tree)
|
|
return;
|
|
|
|
/* initialize the COAP length and the content-type */
|
|
/*
|
|
* the length of COAP message is not specified in the COAP header.
|
|
* It has to be from the lower layer. the iplen of packet_info is not accurate.
|
|
* Currently, the length is just copied from the reported length of the tvbuffer.
|
|
*/
|
|
coap_length = tvb_reported_length(tvb);
|
|
coap_content_type = NULL;
|
|
coap_content_type_value = ~0;
|
|
|
|
coap_root = proto_tree_add_item(parent_tree, proto_coap, tvb, offset, -1, ENC_NA);
|
|
coap_tree = proto_item_add_subtree(coap_root, ett_coap);
|
|
|
|
proto_tree_add_item(coap_tree, hf_coap_version, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
proto_tree_add_item(coap_tree, hf_coap_ttype, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
ttype = (tvb_get_guint8(tvb, offset) & 0x30) >> 4;
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(ttype, vals_ttype, "Unknown %d"));
|
|
|
|
proto_tree_add_item(coap_tree, hf_coap_opt_count, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
opt_count = tvb_get_guint8(tvb, offset) & 0x0f;
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(coap_tree, hf_coap_code, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
code = tvb_get_guint8(tvb, offset);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", val_to_str(code, vals_code, "Unknown %d"));
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(coap_tree, hf_coap_tid, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
tid = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
|
|
/* append the header information */
|
|
proto_item_append_text(coap_tree, ", TID: %u, Length: %u", tid, coap_length);
|
|
|
|
/* initialize the external value */
|
|
block_number = ~0;
|
|
block_mflag = 0;
|
|
uri_string[0] = 0;
|
|
|
|
/* dissect the options */
|
|
for (i = 1; i <= opt_count; i++) {
|
|
offset = dissect_coap_options(tvb, pinfo, coap_tree, offset, i, &opt_code);
|
|
if (coap_length < offset) {
|
|
/* error */
|
|
proto_tree_add_text(coap_tree, tvb, 0, 0, "Invalid length: coap_length(%d) < offset(%d)", coap_length, offset);
|
|
return;
|
|
}
|
|
}
|
|
if (block_number != ~0) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %sBlock #%d", block_mflag ? "" : "End of ", block_number);
|
|
}
|
|
if (uri_string[0] != '\0') {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", %s", uri_string);
|
|
}
|
|
|
|
/* dissect the payload */
|
|
if (coap_length > offset) {
|
|
proto_tree *payload_tree = NULL;
|
|
proto_item *payload_item = NULL;
|
|
tvbuff_t *payload_tvb;
|
|
guint payload_length = coap_length - offset;
|
|
char *ctype_str_default = "";
|
|
|
|
/*
|
|
* TODO: should the content type be canonicalized ?
|
|
* currently assuming it be small.
|
|
*/
|
|
if (coap_content_type_value == ~0) {
|
|
/* default: coap-02 section 3.2.1 */
|
|
coap_content_type = "text/plain";
|
|
ctype_str_default = " (default)";
|
|
}
|
|
|
|
payload_item = proto_tree_add_text(coap_tree, tvb, offset, -1, "Payload Content-Type: %s%s, Length: %u, offset: %u",
|
|
coap_content_type, ctype_str_default, payload_length, offset);
|
|
payload_tree = proto_item_add_subtree(payload_item, ett_coap_payload);
|
|
payload_tvb = tvb_new_subset(tvb, offset, payload_length, payload_length);
|
|
|
|
dissector_try_string(media_type_dissector_table, coap_content_type, payload_tvb, pinfo, payload_tree);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Protocol initialization
|
|
*/
|
|
void
|
|
proto_register_coap(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_coap_version, { "Version", "coap.version", FT_UINT8, BASE_DEC, NULL, 0xc0, "COAP Version", HFILL }},
|
|
{ &hf_coap_ttype, { "Type", "coap.type", FT_UINT8, BASE_DEC, VALS(vals_ttype), 0x30, "COAP Transaction Type", HFILL }},
|
|
{ &hf_coap_opt_count, { "Option Count", "coap.optcount", FT_UINT8, BASE_DEC, NULL, 0x0f, "COAP Option Count", HFILL }},
|
|
{ &hf_coap_code, { "Code", "coap.code", FT_UINT8, BASE_DEC, VALS(vals_code), 0x0, "COAP Method or Response Code", HFILL }},
|
|
{ &hf_coap_tid, { "Transaction ID", "coap.tid", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Transaction ID", HFILL }},
|
|
{ &hf_coap_opt_delta, { "Delta", "coap.opt.delta", FT_UINT8, BASE_DEC, NULL, 0xf0, "COAP Option Delta", HFILL }},
|
|
{ &hf_coap_opt_length, { "Length", "coap.opt.length", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Option Length", HFILL }},
|
|
{ &hf_coap_opt_ctype, { "Content-type", "coap.opt.ctype", FT_UINT8, BASE_DEC, VALS(vals_ctype), 0x0, "COAP Content Type", HFILL }},
|
|
{ &hf_coap_opt_max_age, { "Max-age", "coap.opt.max_age", FT_UINT32, BASE_DEC, NULL, 0x0, "COAP Max-age", HFILL }},
|
|
{ &hf_coap_opt_proxy_uri, { "Proxy-Uri", "coap.opt.proxy_uri", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Proxy-Uri", HFILL }},
|
|
{ &hf_coap_opt_etag, { "Etag", "coap.opt.etag", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP Etag", HFILL }},
|
|
{ &hf_coap_opt_uri_host, { "Uri-Host", "coap.opt.uri_host", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Host", HFILL }},
|
|
{ &hf_coap_opt_location_path, { "Location-Path", "coap.opt.location_path", FT_STRING, BASE_NONE, NULL, 0x0, "COAP URI Path", HFILL }},
|
|
{ &hf_coap_opt_uri_port, { "Uri-Port", "coap.opt.uri_port", FT_UINT16, BASE_DEC, NULL, 0x0, "COAP Uri-Port", HFILL }},
|
|
{ &hf_coap_opt_location_query, { "Location-Query", "coap.opt.location_query", FT_STRING, BASE_NONE, NULL, 0x0, "COAP URI Query", HFILL }},
|
|
{ &hf_coap_opt_uri_path, { "Uri-Path", "coap.opt.uri_path", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Path", HFILL }},
|
|
{ &hf_coap_opt_observe, { "Lifetime", "coap.opt.subscr_lifetime", FT_INT32, BASE_DEC, NULL, 0x0, "COAP Observe", HFILL }},
|
|
{ &hf_coap_opt_token, { "Token", "coap.opt.token", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP Token", HFILL }},
|
|
{ &hf_coap_opt_accept, { "Accept", "coap.opt.accept", FT_UINT8, BASE_DEC, VALS(vals_ctype), 0x0, "COAP Acceptable Content Type", HFILL }},
|
|
{ &hf_coap_opt_if_match, { "If-Match", "coap.opt.if_match", FT_BYTES, BASE_NONE, NULL, 0x0, "COAP If-Match", HFILL }},
|
|
{ &hf_coap_opt_block_number, { "Block Number", "coap.opt.block_number", FT_INT32, BASE_DEC, NULL, 0x0, "COAP Block Number", HFILL }},
|
|
{ &hf_coap_opt_block_mflag, { "More Flag", "coap.opt.block_mflag", FT_UINT8, BASE_DEC, NULL, 0x08, "COAP Block More Size", HFILL }},
|
|
{ &hf_coap_opt_block_size, { "Encoded Block Size", "coap.opt.block_size", FT_UINT8, BASE_DEC, NULL, 0x07, "COAP Encoded Block Size", HFILL }},
|
|
{ &hf_coap_opt_uri_query, { "Uri-Query", "coap.opt.uri_query", FT_STRING, BASE_NONE, NULL, 0x0, "COAP Uri-Query", HFILL }},
|
|
{ &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 }},
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_coap,
|
|
&ett_coap_option,
|
|
&ett_coap_payload,
|
|
};
|
|
|
|
module_t *coap_module;
|
|
|
|
proto_coap = proto_register_protocol("Constrained Application Protocol", "COAP", "coap");
|
|
proto_register_field_array(proto_coap, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("coap", dissect_coap, proto_coap);
|
|
|
|
/* Register our configuration options */
|
|
coap_module = prefs_register_protocol (proto_coap, proto_reg_handoff_coap);
|
|
|
|
prefs_register_uint_preference (coap_module, "udp_port",
|
|
"COAP port number",
|
|
"Port number used for COAP traffic",
|
|
10, &global_coap_port_number);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_coap(void)
|
|
{
|
|
static gboolean coap_prefs_initialized = FALSE;
|
|
static dissector_handle_t coap_handle;
|
|
static guint coap_port_number;
|
|
|
|
if (!coap_prefs_initialized) {
|
|
coap_handle = find_dissector("coap");
|
|
media_type_dissector_table = find_dissector_table("media_type");
|
|
coap_prefs_initialized = TRUE;
|
|
} else {
|
|
dissector_delete_uint("udp.port", coap_port_number, coap_handle);
|
|
dissector_delete_uint("tcp.port", coap_port_number, coap_handle);
|
|
}
|
|
|
|
coap_port_number = global_coap_port_number;
|
|
dissector_add_uint("udp.port", coap_port_number, coap_handle);
|
|
dissector_add_uint("tcp.port", coap_port_number, coap_handle);
|
|
}
|