1761 lines
72 KiB
C
1761 lines
72 KiB
C
/* packet-stun.c
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* Routines for Session Traversal Utilities for NAT (STUN) dissection
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* Copyright 2003, Shiang-Ming Huang <smhuang@pcs.csie.nctu.edu.tw>
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* Copyright 2006, Marc Petit-Huguenin <marc@petit-huguenin.org>
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* Copyright 2007-2008, 8x8 Inc. <petithug@8x8.com>
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* Copyright 2008, Gael Breard <gael@breard.org>
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* Copyright 2013, Media5 Corporation, David Bergeron <dbergeron@media5corp.com>
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please refer to the following specs for protocol detail:
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* - RFC 5389, formerly draft-ietf-behave-rfc3489bis-18
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* - RFC 5245, formerly draft-ietf-mmusic-ice-19
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* - RFC 5780, formerly draft-ietf-behave-nat-behavior-discovery-08
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* - RFC 5766, formerly draft-ietf-behave-turn-16
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* - draft-ietf-behave-turn-ipv6-11
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* - RFC 3489, http://www.faqs.org/rfcs/rfc3489.html (Addition of deprecated attributes for diagnostics purpose)
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* - RFC 6062
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*
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* From MS (Lync)
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* MS-TURN: Traversal Using Relay NAT (TURN) Extensions http://msdn.microsoft.com/en-us/library/cc431507.aspx
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* MS-ICE2BWN: Interactive Connectivity Establishment (ICE) 2.0 Bandwidth Management Extensions http://msdn.microsoft.com/en-us/library/ff595756.aspx
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* MS-TURNBWM: Traversal using Relay NAT (TURN) Bandwidth Management Extensions http://msdn.microsoft.com/en-us/library/ff595670.aspx
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* MS-ICE2: Interactive Connectivity Establishment ICE Extensions 2.0 http://msdn.microsoft.com/en-us/library/office/cc431504.aspx
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/to_str.h>
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#include "packet-tcp.h"
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void proto_register_stun(void);
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void proto_reg_handoff_stun(void);
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/* heuristic subdissectors */
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static heur_dissector_list_t heur_subdissector_list;
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/* stun dissector handles */
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static dissector_handle_t data_handle;
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static dissector_handle_t stun_tcp_handle;
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static dissector_handle_t stun_udp_handle;
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/* Initialize the protocol and registered fields */
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static int proto_stun = -1;
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static int hf_stun_channel = -1;
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static int hf_stun_tcp_frame_length = -1;
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static int hf_stun_type = -1;
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static int hf_stun_type_class = -1;
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static int hf_stun_type_method = -1;
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static int hf_stun_type_method_assignment = -1;
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static int hf_stun_length = -1;
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static int hf_stun_cookie = -1;
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static int hf_stun_id = -1;
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static int hf_stun_attributes = -1;
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static int hf_stun_response_in = -1;
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static int hf_stun_response_to = -1;
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static int hf_stun_time = -1;
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static int hf_stun_duplicate = -1;
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static int hf_stun_attr = -1;
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static int hf_stun_att_type = -1; /* STUN attribute fields */
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static int hf_stun_att_length = -1;
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static int hf_stun_att_family = -1;
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static int hf_stun_att_type_comprehension = -1;
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static int hf_stun_att_type_assignment = -1;
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static int hf_stun_att_ipv4 = -1;
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static int hf_stun_att_ipv6 = -1;
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static int hf_stun_att_port = -1;
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static int hf_stun_att_username = -1;
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static int hf_stun_att_password = -1;
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static int hf_stun_att_padding = -1;
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static int hf_stun_att_hmac = -1;
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static int hf_stun_att_crc32 = -1;
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static int hf_stun_att_error_class = -1;
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static int hf_stun_att_error_number = -1;
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static int hf_stun_att_error_reason = -1;
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static int hf_stun_att_realm = -1;
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static int hf_stun_att_nonce = -1;
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static int hf_stun_att_unknown = -1;
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static int hf_stun_att_xor_ipv4 = -1;
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static int hf_stun_att_xor_ipv6 = -1;
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static int hf_stun_att_xor_port = -1;
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static int hf_stun_att_icmp_type = -1;
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static int hf_stun_att_icmp_code = -1;
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static int hf_stun_att_software = -1;
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static int hf_stun_att_priority = -1;
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static int hf_stun_att_tie_breaker = -1;
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static int hf_stun_att_change_ip = -1;
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static int hf_stun_att_change_port = -1;
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static int hf_stun_att_cache_timeout = -1;
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static int hf_stun_att_token = -1;
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static int hf_stun_att_reserve_next = -1;
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static int hf_stun_att_reserved = -1;
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static int hf_stun_att_value = -1;
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static int hf_stun_att_transp = -1;
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static int hf_stun_att_magic_cookie = -1;
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static int hf_stun_att_bandwidth = -1;
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static int hf_stun_att_lifetime = -1;
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static int hf_stun_att_channelnum = -1;
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static int hf_stun_att_ms_version = -1;
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static int hf_stun_att_ms_connection_id = -1;
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static int hf_stun_att_ms_sequence_number = -1;
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static int hf_stun_att_ms_stream_type = -1;
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static int hf_stun_att_ms_service_quality = -1;
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static int hf_stun_att_ms_foundation = -1;
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static int hf_stun_att_bandwidth_acm_type = -1;
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static int hf_stun_att_bandwidth_rsv_id = -1;
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static int hf_stun_att_bandwidth_rsv_amount_misb = -1;
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static int hf_stun_att_bandwidth_rsv_amount_masb = -1;
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static int hf_stun_att_bandwidth_rsv_amount_mirb = -1;
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static int hf_stun_att_bandwidth_rsv_amount_marb = -1;
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static int hf_stun_att_address_rp_a = -1;
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static int hf_stun_att_address_rp_b = -1;
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static int hf_stun_att_address_rp_rsv1 = -1;
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static int hf_stun_att_address_rp_rsv2 = -1;
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static int hf_stun_att_address_rp_masb = -1;
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static int hf_stun_att_address_rp_marb = -1;
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static int hf_stun_att_sip_dialog_id = -1;
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static int hf_stun_att_sip_call_id = -1;
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static int hf_stun_att_lp_peer_location = -1;
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static int hf_stun_att_lp_self_location = -1;
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static int hf_stun_att_lp_federation = -1;
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/* Structure containing transaction specific information */
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typedef struct _stun_transaction_t {
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guint32 req_frame;
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guint32 rep_frame;
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nstime_t req_time;
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} stun_transaction_t;
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/* Structure containing conversation specific information */
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typedef struct _stun_conv_info_t {
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wmem_tree_t *transaction_pdus;
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} stun_conv_info_t;
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/* Message classes */
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#define REQUEST 0x0000
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#define INDICATION 0x0001
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#define RESPONSE 0x0002
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#define ERROR_RESPONSE 0x0003
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/* Methods */
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#define BINDING 0x0001 /* draft-ietf-behave-rfc3489bis-17 */
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#define ALLOCATE 0x0003 /* draft-ietf-behave-turn-10*/
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#define REFRESH 0x0004 /* draft-ietf-behave-turn-10*/
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#define CHANNELBIND 0x0009 /* draft-ietf-behave-turn-10*/
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#define CREATE_PERMISSION 0x0008 /* draft-ietf-behave-turn-10 */
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/* Indications */
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#define SEND 0x0006 /* draft-ietf-behave-turn-10*/
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#define DATA_IND 0x0007 /* draft-ietf-behave-turn-10*/
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/* TCP specific */
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#define CONNECT 0x000a /* rfc6062 */
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#define CONNECTION_BIND 0x000b /* rfc6062 */
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#define CONNECTION_ATTEMPT 0x000c /* rfc6062 */
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/* Attribute Types */
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/* Comprehension-required range (0x0000-0x7FFF) */
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#define MAPPED_ADDRESS 0x0001 /* draft-ietf-behave-rfc3489bis-17 */
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#define RESPONSE_ADDRESS 0x0002 /* Deprecated */
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#define CHANGE_REQUEST 0x0003 /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define SOURCE_ADDRESS 0x0004 /* Deprecated */
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#define CHANGED_ADDRESS 0x0005 /* Deprecated */
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#define USERNAME 0x0006 /* draft-ietf-behave-rfc3489bis-17 */
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#define PASSWORD 0x0007 /* Deprecated */
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#define MESSAGE_INTEGRITY 0x0008 /* draft-ietf-behave-rfc3489bis-17 */
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#define ERROR_CODE 0x0009 /* draft-ietf-behave-rfc3489bis-17 */
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#define UNKNOWN_ATTRIBUTES 0x000a /* draft-ietf-behave-rfc3489bis-17 */
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#define REFLECTED_FROM 0x000b /* Deprecated */
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#define CHANNEL_NUMBER 0x000c /* draft-ietf-behave-turn-10 */
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#define LIFETIME 0x000d /* draft-ietf-behave-turn-10 */
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#define MAGIC_COOKIE 0x000f /* MS-TURN / turn-08 */
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#define BANDWIDTH 0x0010 /* turn-07 */
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#define DESTINATION_ADDRESS 0x0011 /* MS-TURN / turn-08 */
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#define XOR_PEER_ADDRESS 0x0012 /* draft-ietf-behave-turn-10 */
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#define DATA 0x0013 /* draft-ietf-behave-turn-10 */
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#define REALM 0x0014 /* draft-ietf-behave-rfc3489bis-17 */
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#define NONCE 0x0015 /* draft-ietf-behave-rfc3489bis-17 */
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#define XOR_RELAYED_ADDRESS 0x0016 /* draft-ietf-behave-turn-10 */
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#define REQUESTED_ADDRESS_TYPE 0x0017 /* draft-ietf-behave-turn-ipv6-03 */
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#define EVEN_PORT 0x0018 /* draft-ietf-behave-turn-10 */
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#define REQUESTED_TRANSPORT 0x0019 /* draft-ietf-behave-turn-10 */
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#define DONT_FRAGMENT 0x001a /* draft-ietf-behave-turn-10 */
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#define XOR_MAPPED_ADDRESS 0x0020 /* draft-ietf-behave-rfc3489bis-17 */
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#define RESERVATION_TOKEN 0x0022 /* draft-ietf-behave-turn-10 */
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#define PRIORITY 0x0024 /* draft-ietf-mmusic-ice-19 */
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#define USE_CANDIDATE 0x0025 /* draft-ietf-mmusic-ice-19 */
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#define PADDING 0x0026 /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define XOR_RESPONSE_TARGET 0x0027 /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define XOR_REFLECTED_FROM 0x0028 /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define CONNECTION_ID 0x002a /* rfc6062 */
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#define ICMP 0x0030 /* Moved from TURN to a future I-D */
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/* Comprehension-optional range (0x8000-0xFFFF) */
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#define MS_VERSION 0x8008 /* MS-TURN */
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#define MS_XOR_MAPPED_ADDRESS 0x8020 /* MS-TURN */
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#define SOFTWARE 0x8022 /* draft-ietf-behave-rfc3489bis-17 */
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#define ALTERNATE_SERVER 0x8023 /* draft-ietf-behave-rfc3489bis-17 */
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#define CACHE_TIMEOUT 0x8027 /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define FINGERPRINT 0x8028 /* draft-ietf-behave-rfc3489bis-17 */
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#define ICE_CONTROLLED 0x8029 /* draft-ietf-mmusic-ice-19 */
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#define ICE_CONTROLLING 0x802a /* draft-ietf-mmusic-ice-19 */
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#define RESPONSE_ORIGIN 0x802b /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define OTHER_ADDRESS 0x802c /* draft-ietf-behave-nat-behavior-discovery-03 */
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#define MS_SEQUENCE_NUMBER 0x8050 /* MS-TURN */
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#define MS_CANDIDATE_IDENTIFIER 0x8054 /* MS-ICE2 */
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#define MS_SERVICE_QUALITY 0x8055 /* MS-TURN */
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#define BANDWIDTH_ACM 0x8056 /* MS-TURNBWM */
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#define BANDWIDTH_RSV_ID 0x8057 /* MS-TURNBWM */
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#define BANDWIDTH_RSV_AMOUNT 0x8058 /* MS-TURNBWM */
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#define REMOTE_SITE_ADDR 0x8059 /* MS-TURNBWM */
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#define REMOTE_RELAY_SITE 0x805A /* MS-TURNBWM */
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#define LOCAL_SITE_ADDR 0x805B /* MS-TURNBWM */
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#define LOCAL_RELAY_SITE 0x805C /* MS-TURNBWM */
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#define REMOTE_SITE_ADDR_RP 0x805D /* MS-TURNBWM */
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#define REMOTE_RELAY_SITE_RP 0x805E /* MS-TURNBWM */
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#define LOCAL_SITE_ADDR_RP 0x805F /* MS-TURNBWM */
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#define LOCAL_RELAY_SITE_RP 0x8060 /* MS-TURNBWM */
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#define SIP_DIALOG_ID 0x8061 /* MS-TURNBWM */
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#define SIP_CALL_ID 0x8062 /* MS-TURNBWM */
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#define LOCATION_PROFILE 0x8068 /* MS-TURNBWM */
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#define MS_IMPLEMENTATION_VER 0x8070 /* MS-ICE2 */
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#define MS_ALT_MAPPED_ADDRESS 0x8090 /* MS-TURN */
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/* Initialize the subtree pointers */
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static gint ett_stun = -1;
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static gint ett_stun_type = -1;
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static gint ett_stun_att_all= -1;
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static gint ett_stun_att = -1;
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static gint ett_stun_att_type = -1;
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#define UDP_PORT_STUN 3478
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#define TCP_PORT_STUN 3478
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#define STUN_HDR_LEN 20 /* STUN message header length */
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#define ATTR_HDR_LEN 4 /* STUN attribute header length */
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#define CHANNEL_DATA_HDR_LEN 4 /* TURN CHANNEL-DATA Message hdr length */
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#define MIN_HDR_LEN 4
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#define TCP_FRAME_COOKIE_LEN 10 /* min length for cookie with TCP framing */
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static const value_string transportnames[] = {
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{ 17, "UDP" },
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{ 6, "TCP" },
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{ 0, NULL }
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};
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static const value_string classes[] = {
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{REQUEST , "Request"},
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{INDICATION , "Indication"},
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{RESPONSE , "Success Response"},
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{ERROR_RESPONSE, "Error Response"},
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{0x00 , NULL}
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};
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static const value_string methods[] = {
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{BINDING , "Binding"},
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{ALLOCATE , "Allocate"},
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{REFRESH , "Refresh"},
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{SEND , "Send"},
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{DATA_IND , "Data"},
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{CREATE_PERMISSION , "CreatePermission"},
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{CHANNELBIND , "Channel-Bind"},
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{CONNECT , "Connect"},
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{CONNECTION_BIND , "ConnectionBind"},
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{CONNECTION_ATTEMPT, "ConnectionAttempt"},
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{0x00 , NULL}
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};
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static const value_string attributes[] = {
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{MAPPED_ADDRESS , "MAPPED-ADDRESS"},
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{RESPONSE_ADDRESS , "RESPONSE_ADDRESS"},
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{CHANGE_REQUEST , "CHANGE_REQUEST"},
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{SOURCE_ADDRESS , "SOURCE_ADDRESS"},
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{CHANGED_ADDRESS , "CHANGED_ADDRESS"},
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{USERNAME , "USERNAME"},
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{PASSWORD , "PASSWORD"},
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{MESSAGE_INTEGRITY , "MESSAGE-INTEGRITY"},
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{ERROR_CODE , "ERROR-CODE"},
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{UNKNOWN_ATTRIBUTES , "UNKNOWN-ATTRIBUTES"},
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{REFLECTED_FROM , "REFLECTED-FROM"},
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{CHANNEL_NUMBER , "CHANNEL-NUMBER"},
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{LIFETIME , "LIFETIME"},
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{MAGIC_COOKIE , "MAGIC-COOKIE"},
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{BANDWIDTH , "BANDWIDTH"},
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{DESTINATION_ADDRESS , "DESTINATION-ADDRESS"},
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{XOR_PEER_ADDRESS , "XOR-PEER-ADDRESS"},
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{DATA , "DATA"},
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{REALM , "REALM"},
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{NONCE , "NONCE"},
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{XOR_RELAYED_ADDRESS , "XOR-RELAYED-ADDRESS"},
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{REQUESTED_ADDRESS_TYPE, "REQUESTED-ADDRESS-TYPE"},
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{EVEN_PORT , "EVEN-PORT"},
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{REQUESTED_TRANSPORT , "REQUESTED-TRANSPORT"},
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{DONT_FRAGMENT , "DONT-FRAGMENT"},
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{XOR_MAPPED_ADDRESS , "XOR-MAPPED-ADDRESS"},
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{RESERVATION_TOKEN , "RESERVATION-TOKEN"},
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{PRIORITY , "PRIORITY"},
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{USE_CANDIDATE , "USE-CANDIDATE"},
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{PADDING , "PADDING"},
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{XOR_RESPONSE_TARGET , "XOR-RESPONSE-TARGET"},
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{XOR_REFLECTED_FROM , "XOR-REFELECTED-FROM"},
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{CONNECTION_ID , "CONNECTION-ID"},
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{ICMP , "ICMP"},
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{MS_VERSION , "MS-VERSION"},
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{MS_XOR_MAPPED_ADDRESS , "XOR-MAPPED-ADDRESS"},
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{SOFTWARE , "SOFTWARE"},
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{ALTERNATE_SERVER , "ALTERNATE-SERVER"},
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{CACHE_TIMEOUT , "CACHE-TIMEOUT"},
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{FINGERPRINT , "FINGERPRINT"},
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{ICE_CONTROLLED , "ICE-CONTROLLED"},
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{ICE_CONTROLLING , "ICE-CONTROLLING"},
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{RESPONSE_ORIGIN , "RESPONSE-ORIGIN"},
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{OTHER_ADDRESS , "OTHER-ADDRESS"},
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{MS_SEQUENCE_NUMBER , "MS-SEQUENCE-NUMBER"},
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{MS_CANDIDATE_IDENTIFIER, "MS-CANDIDATE-IDENTIFIER"},
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{MS_SERVICE_QUALITY , "MS-SERVICE-QUALITY"},
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{BANDWIDTH_ACM , "Bandwidth Admission Control Message"},
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{BANDWIDTH_RSV_ID , "Bandwidth Reservation Identifier"},
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{BANDWIDTH_RSV_AMOUNT , "Bandwidth Reservation Amount"},
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{REMOTE_SITE_ADDR , "Remote Site Address"},
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{REMOTE_RELAY_SITE , "Remote Relay Site Address"},
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{LOCAL_SITE_ADDR , "Local Site Address"},
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{LOCAL_RELAY_SITE , "Local Relay Site Address"},
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{REMOTE_SITE_ADDR_RP , "Remote Site Address Response"},
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{REMOTE_RELAY_SITE_RP , "Remote Relay Site Address Response"},
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{LOCAL_SITE_ADDR_RP , "Local Site Address Response"},
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{LOCAL_RELAY_SITE_RP , "Local Relay Site Address Response"},
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{SIP_DIALOG_ID , "SIP Dialog Identifier"},
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{SIP_CALL_ID , "SIP Call Identifier"},
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{LOCATION_PROFILE , "Location Profile"},
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{MS_IMPLEMENTATION_VER , "MS-IMPLEMENTATION-VERSION"},
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{MS_ALT_MAPPED_ADDRESS , "MS-ALT-MAPPED-ADDRESS"},
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{0x00 , NULL}
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};
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static value_string_ext attributes_ext = VALUE_STRING_EXT_INIT(attributes);
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static const value_string assignments[] = {
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{0x0000, "IETF Review"},
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{0x0001, "Designated Expert"},
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{0x00, NULL}
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};
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|
|
static const value_string comprehensions[] = {
|
|
{0x0000, "Required"},
|
|
{0x0001, "Optional"},
|
|
{0x00 , NULL}
|
|
};
|
|
|
|
static const value_string attributes_reserve_next[] = {
|
|
{0, "No reservation"},
|
|
{1, "Reserve next port number"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
#if 0
|
|
static const value_string attributes_properties_p[] = {
|
|
{0, "All allocation"},
|
|
{1, "Preserving allocation"},
|
|
{0x00, NULL}
|
|
};
|
|
#endif
|
|
|
|
static const value_string attributes_family[] = {
|
|
{0x0001, "IPv4"},
|
|
{0x0002, "IPv6"},
|
|
{0x00, NULL}
|
|
};
|
|
/* http://www.iana.org/assignments/stun-parameters/stun-parameters.xhtml#stun-parameters-6 (2015-06-12)*/
|
|
|
|
static const value_string error_code[] = {
|
|
{274, "Disable Candidate"}, /* MS-ICE2BWN */
|
|
{275, "Disable Candidate Pair"}, /* MS-ICE2BWN */
|
|
{300, "Try Alternate"}, /* rfc3489bis-15 */
|
|
{400, "Bad Request"}, /* rfc3489bis-15 */
|
|
{401, "Unauthorized"}, /* rfc3489bis-15 */
|
|
{403, "Forbidden"}, /* rfc5766 */
|
|
{420, "Unknown Attribute"}, /* rfc3489bis-15 */
|
|
{437, "Allocation Mismatch"}, /* turn-07 */
|
|
{438, "Stale Nonce"}, /* rfc3489bis-15 */
|
|
{439, "Wrong Credentials"}, /* turn-07 - collision 38=>39 */
|
|
{440, "Address Family not Supported"}, /* turn-ipv6-04 */
|
|
{441, "Wrong Credentials"}, /* rfc5766 */
|
|
{442, "Unsupported Transport Protocol"}, /* turn-07 */
|
|
{443, "Peer Address Family Mismatch"}, /* rfc6156 */
|
|
{446, "Connection Already Exists"}, /* rfc6062 */
|
|
{447, "Connection Timeout or Failure"}, /* rfc6062 */
|
|
{481, "Connection does not exist"}, /* nat-behavior-discovery-03 */
|
|
{486, "Allocation Quota Reached"}, /* turn-07 */
|
|
{487, "Role Conflict"}, /* rfc5245 */
|
|
{500, "Server Error"}, /* rfc3489bis-15 */
|
|
{503, "Service Unavailable"}, /* nat-behavior-discovery-03 */
|
|
{507, "Insufficient Bandwidth Capacity"}, /* turn-07 */
|
|
{508, "Insufficient Port Capacity"}, /* turn-07 */
|
|
{600, "Global Failure"},
|
|
{0x00, NULL}
|
|
};
|
|
static value_string_ext error_code_ext = VALUE_STRING_EXT_INIT(error_code);
|
|
|
|
static const value_string ms_version_vals[] = {
|
|
{0x00000001, "ICE"},
|
|
{0x00000002, "MS-ICE2"},
|
|
{0x00000003, "MS-ICE2 with SHA256"},
|
|
{0x00000004, "MS-ICE2 with SHA256 and IPv6"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static const value_string ms_stream_type_vals[] = {
|
|
{0x0001, "Audio"},
|
|
{0x0002, "Video"},
|
|
{0x0003, "Supplemental Video"},
|
|
{0x0004, "Data"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static const value_string ms_service_quality_vals[] = {
|
|
{0x0000, "Best effort delivery"},
|
|
{0x0001, "Reliable delivery"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static const value_string bandwidth_acm_type_vals[] = {
|
|
{0x0000, "Reservation Check"},
|
|
{0x0001, "Reservation Commit"},
|
|
{0x0002, "Reservation Update"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static const value_string location_vals[] = {
|
|
{0x00, "Unknown"},
|
|
{0x01, "Internet"},
|
|
{0x02, "Intranet"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static const value_string federation_vals[] = {
|
|
{0x00, "No Federation"},
|
|
{0x01, "Enterprise Federation"},
|
|
{0x02, "Public Cloud Federation"},
|
|
{0x00, NULL}
|
|
};
|
|
|
|
static guint
|
|
get_stun_message_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset, void *data _U_)
|
|
{
|
|
guint16 type;
|
|
guint length;
|
|
guint captured_length = tvb_captured_length(tvb);
|
|
|
|
if ((captured_length >= TCP_FRAME_COOKIE_LEN) &&
|
|
(tvb_get_ntohl(tvb, 6) == 0x2112a442)) {
|
|
/* The magic cookie is off by two, this appears
|
|
to be RFC4751 framing */
|
|
return (tvb_get_ntohs(tvb, 0) + 2);
|
|
}
|
|
|
|
type = tvb_get_ntohs(tvb, offset);
|
|
length = tvb_get_ntohs(tvb, offset+2);
|
|
|
|
if (type & 0xC000)
|
|
{
|
|
/* two first bits not NULL => should be a channel-data message */
|
|
/* Note: For TCP the message is padded to a 4 byte boundary */
|
|
return (length + CHANNEL_DATA_HDR_LEN +3) & ~0x3;
|
|
}
|
|
else
|
|
{
|
|
/* Normal STUN message */
|
|
return length + STUN_HDR_LEN;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* XXX: why is this done in this file by the STUN dissector? Why don't we
|
|
* re-use the packet-turnchannel.c's dissect_turnchannel_message() function?
|
|
*/
|
|
static int
|
|
dissect_stun_message_channel_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 msg_type _U_, guint msg_length _U_)
|
|
{
|
|
tvbuff_t *next_tvb;
|
|
heur_dtbl_entry_t *hdtbl_entry;
|
|
|
|
/* XXX: a TURN ChannelData message is not actually a STUN message. */
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "STUN");
|
|
col_set_str(pinfo->cinfo, COL_INFO, "ChannelData TURN Message");
|
|
|
|
if (tree) {
|
|
proto_item *ti;
|
|
proto_tree *stun_tree;
|
|
ti = proto_tree_add_item(
|
|
tree, proto_stun, tvb, 0,
|
|
CHANNEL_DATA_HDR_LEN,
|
|
ENC_NA);
|
|
proto_item_append_text(ti, ", TURN ChannelData Message");
|
|
stun_tree = proto_item_add_subtree(ti, ett_stun);
|
|
proto_tree_add_item(stun_tree, hf_stun_channel, tvb, 0, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(stun_tree, hf_stun_length, tvb, 2, 2, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
next_tvb = tvb_new_subset_remaining(tvb, CHANNEL_DATA_HDR_LEN);
|
|
|
|
if (!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, NULL)) {
|
|
call_dissector_only(data_handle, next_tvb, pinfo, tree, NULL);
|
|
}
|
|
|
|
return tvb_reported_length(tvb);
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_stun_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, gboolean heur_check, gboolean is_udp)
|
|
{
|
|
guint captured_length;
|
|
guint16 msg_type;
|
|
guint msg_length;
|
|
proto_item *ti;
|
|
proto_tree *stun_tree;
|
|
proto_tree *stun_type_tree;
|
|
proto_tree *att_all_tree;
|
|
proto_tree *att_type_tree;
|
|
proto_tree *att_tree = NULL;
|
|
guint16 msg_type_method;
|
|
guint16 msg_type_class;
|
|
const char *msg_class_str;
|
|
const char *msg_method_str;
|
|
guint16 att_type;
|
|
guint16 att_length;
|
|
guint i;
|
|
guint offset;
|
|
guint magic_cookie_first_word;
|
|
guint tcp_framing_offset;
|
|
conversation_t *conversation=NULL;
|
|
stun_conv_info_t *stun_info;
|
|
stun_transaction_t *stun_trans;
|
|
wmem_tree_key_t transaction_id_key[2];
|
|
guint32 transaction_id[3];
|
|
heur_dtbl_entry_t *hdtbl_entry;
|
|
guint reported_length;
|
|
gboolean is_turn = FALSE;
|
|
|
|
/*
|
|
* Check if the frame is really meant for us.
|
|
*/
|
|
|
|
/* First, make sure we have enough data to do the check. */
|
|
captured_length = tvb_captured_length(tvb);
|
|
reported_length = tvb_reported_length(tvb);
|
|
if (captured_length < MIN_HDR_LEN)
|
|
return 0;
|
|
|
|
tcp_framing_offset = 0;
|
|
if ((!is_udp) && (captured_length >= TCP_FRAME_COOKIE_LEN) &&
|
|
(tvb_get_ntohl(tvb, 6) == 0x2112a442)) {
|
|
/* we found ICE TCP framing according to RFC 4571 */
|
|
tcp_framing_offset = 2;
|
|
}
|
|
|
|
msg_type = tvb_get_ntohs(tvb, tcp_framing_offset + 0);
|
|
msg_length = tvb_get_ntohs(tvb, tcp_framing_offset + 2);
|
|
|
|
/* TURN ChannelData message ? */
|
|
if (msg_type & 0xC000) {
|
|
/* two first bits not NULL => should be a channel-data message */
|
|
|
|
/*
|
|
* If the packet is being dissected through heuristics, we never match
|
|
* TURN ChannelData because the heuristics are otherwise rather weak.
|
|
* Instead we have to have seen another TURN message type on the same
|
|
* 5-tuple, and then set that conversation for non-heuristic STUN dissection.
|
|
*/
|
|
if (heur_check)
|
|
return 0;
|
|
|
|
if (msg_type == 0xFFFF)
|
|
return 0;
|
|
|
|
/* note that padding is only mandatory over streaming
|
|
protocols */
|
|
if (is_udp) {
|
|
if (reported_length != msg_length + CHANNEL_DATA_HDR_LEN &&
|
|
reported_length != ((msg_length + CHANNEL_DATA_HDR_LEN + 3) & ~0x3))
|
|
return 0;
|
|
} else { /* TCP */
|
|
if (reported_length != ((msg_length + CHANNEL_DATA_HDR_LEN + 3) & ~0x3))
|
|
return 0;
|
|
}
|
|
|
|
/* XXX: why don't we invoke the turnchannel dissector instead? */
|
|
return dissect_stun_message_channel_data(tvb, pinfo, tree, msg_type, msg_length);
|
|
}
|
|
|
|
/* Normal STUN message */
|
|
if (captured_length < STUN_HDR_LEN)
|
|
return 0;
|
|
|
|
/* Check if it is really a STUN message */
|
|
if ( tvb_get_ntohl(tvb, tcp_framing_offset + 4) != 0x2112a442)
|
|
return 0;
|
|
|
|
/* check if payload enough */
|
|
if (reported_length != (msg_length + STUN_HDR_LEN + tcp_framing_offset))
|
|
return 0;
|
|
|
|
/* The message seems to be a valid STUN message! */
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "STUN");
|
|
|
|
/* Create the transaction key which may be used
|
|
to track the conversation */
|
|
transaction_id[0] = tvb_get_ntohl(tvb, tcp_framing_offset + 8);
|
|
transaction_id[1] = tvb_get_ntohl(tvb, tcp_framing_offset + 12);
|
|
transaction_id[2] = tvb_get_ntohl(tvb, tcp_framing_offset + 16);
|
|
|
|
transaction_id_key[0].length = 3;
|
|
transaction_id_key[0].key = transaction_id;
|
|
transaction_id_key[1].length = 0;
|
|
transaction_id_key[1].key = NULL;
|
|
|
|
msg_type_class = ((msg_type & 0x0010) >> 4) | ((msg_type & 0x0100) >> 7) ;
|
|
msg_type_method = (msg_type & 0x000F) | ((msg_type & 0x00E0) >> 1) | ((msg_type & 0x3E00) >> 2);
|
|
|
|
switch (msg_type_method) {
|
|
/* if it's a TURN method, remember that */
|
|
case ALLOCATE:
|
|
case REFRESH:
|
|
case SEND:
|
|
case DATA_IND:
|
|
case CREATE_PERMISSION:
|
|
case CHANNELBIND:
|
|
case CONNECT:
|
|
case CONNECTION_BIND:
|
|
case CONNECTION_ATTEMPT:
|
|
is_turn = TRUE;
|
|
break;
|
|
}
|
|
|
|
conversation = find_or_create_conversation(pinfo);
|
|
|
|
/*
|
|
* Do we already have a state structure for this conv
|
|
*/
|
|
stun_info = (stun_conv_info_t *)conversation_get_proto_data(conversation, proto_stun);
|
|
if (!stun_info) {
|
|
/* No. Attach that information to the conversation, and add
|
|
* it to the list of information structures.
|
|
*/
|
|
stun_info = wmem_new(wmem_file_scope(), stun_conv_info_t);
|
|
stun_info->transaction_pdus=wmem_tree_new(wmem_file_scope());
|
|
conversation_add_proto_data(conversation, proto_stun, stun_info);
|
|
}
|
|
|
|
if (!pinfo->fd->flags.visited) {
|
|
if ((stun_trans = (stun_transaction_t *)
|
|
wmem_tree_lookup32_array(stun_info->transaction_pdus,
|
|
transaction_id_key)) == NULL) {
|
|
|
|
transaction_id_key[0].length = 3;
|
|
transaction_id_key[0].key = transaction_id;
|
|
transaction_id_key[1].length = 0;
|
|
transaction_id_key[1].key = NULL;
|
|
|
|
stun_trans=wmem_new(wmem_file_scope(), stun_transaction_t);
|
|
stun_trans->req_frame=0;
|
|
stun_trans->rep_frame=0;
|
|
stun_trans->req_time=pinfo->fd->abs_ts;
|
|
wmem_tree_insert32_array(stun_info->transaction_pdus,
|
|
transaction_id_key,
|
|
(void *)stun_trans);
|
|
}
|
|
|
|
if (msg_type_class == REQUEST) {
|
|
/* This is a request */
|
|
if (stun_trans->req_frame == 0) {
|
|
stun_trans->req_frame=pinfo->fd->num;
|
|
}
|
|
|
|
} else {
|
|
/* This is a catch-all for all non-request messages */
|
|
if (stun_trans->rep_frame == 0) {
|
|
stun_trans->rep_frame=pinfo->fd->num;
|
|
}
|
|
|
|
}
|
|
} else {
|
|
stun_trans=(stun_transaction_t *)wmem_tree_lookup32_array(stun_info->transaction_pdus,
|
|
transaction_id_key);
|
|
}
|
|
|
|
if (!stun_trans) {
|
|
/* create a "fake" pana_trans structure */
|
|
stun_trans=wmem_new(wmem_packet_scope(), stun_transaction_t);
|
|
stun_trans->req_frame=0;
|
|
stun_trans->rep_frame=0;
|
|
stun_trans->req_time=pinfo->fd->abs_ts;
|
|
}
|
|
|
|
|
|
msg_class_str = val_to_str_const(msg_type_class, classes, "Unknown");
|
|
msg_method_str = val_to_str_const(msg_type_method, methods, "Unknown");
|
|
|
|
col_add_lstr(pinfo->cinfo, COL_INFO,
|
|
msg_method_str,
|
|
" ",
|
|
msg_class_str,
|
|
COL_ADD_LSTR_TERMINATOR);
|
|
|
|
offset = 0;
|
|
ti = proto_tree_add_item(tree, proto_stun, tvb, offset, -1, ENC_NA);
|
|
|
|
stun_tree = proto_item_add_subtree(ti, ett_stun);
|
|
|
|
if (msg_type_class == REQUEST) {
|
|
if (stun_trans->req_frame != pinfo->fd->num) {
|
|
proto_item *it;
|
|
it=proto_tree_add_uint(stun_tree, hf_stun_duplicate,
|
|
tvb, offset, 0,
|
|
stun_trans->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
if (stun_trans->rep_frame) {
|
|
proto_item *it;
|
|
it=proto_tree_add_uint(stun_tree, hf_stun_response_in,
|
|
tvb, offset, 0,
|
|
stun_trans->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
}
|
|
else {
|
|
/* Retransmission control */
|
|
if (stun_trans->rep_frame != pinfo->fd->num) {
|
|
proto_item *it;
|
|
it=proto_tree_add_uint(stun_tree, hf_stun_duplicate,
|
|
tvb, offset, 0,
|
|
stun_trans->rep_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
if (msg_type_class == RESPONSE || msg_type_class == ERROR_RESPONSE) {
|
|
/* This is a response */
|
|
if (stun_trans->req_frame) {
|
|
proto_item *it;
|
|
nstime_t ns;
|
|
|
|
it=proto_tree_add_uint(stun_tree, hf_stun_response_to, tvb,
|
|
offset, 0,
|
|
stun_trans->req_frame);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
|
|
nstime_delta(&ns, &pinfo->fd->abs_ts, &stun_trans->req_time);
|
|
it=proto_tree_add_time(stun_tree, hf_stun_time, tvb,
|
|
offset, 0, &ns);
|
|
PROTO_ITEM_SET_GENERATED(it);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (tcp_framing_offset) {
|
|
proto_tree_add_item(stun_tree, hf_stun_tcp_frame_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
ti = proto_tree_add_uint_format_value(stun_tree, hf_stun_type, tvb, offset, 2,
|
|
msg_type, "0x%04x (%s %s)", msg_type, msg_method_str, msg_class_str);
|
|
stun_type_tree = proto_item_add_subtree(ti, ett_stun_type);
|
|
ti = proto_tree_add_uint(stun_type_tree, hf_stun_type_class, tvb, offset, 2, msg_type);
|
|
proto_item_append_text(ti, " %s (%d)", msg_class_str, msg_type_class);
|
|
ti = proto_tree_add_uint(stun_type_tree, hf_stun_type_method, tvb, offset, 2, msg_type);
|
|
proto_item_append_text(ti, " %s (0x%03x)", msg_method_str, msg_type_method);
|
|
proto_tree_add_uint(stun_type_tree, hf_stun_type_method_assignment, tvb, offset, 2, msg_type);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(stun_tree, hf_stun_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(stun_tree, hf_stun_cookie, tvb, offset, 4, ENC_NA);
|
|
offset += 4;
|
|
proto_tree_add_item(stun_tree, hf_stun_id, tvb, offset, 12, ENC_NA);
|
|
offset += 12;
|
|
|
|
/* Remember this (in host order) so we can show clear xor'd addresses */
|
|
magic_cookie_first_word = tvb_get_ntohl(tvb, tcp_framing_offset + 4);
|
|
|
|
if (msg_length != 0) {
|
|
const gchar *attribute_name_str;
|
|
|
|
ti = proto_tree_add_item(stun_tree, hf_stun_attributes, tvb, offset, msg_length, ENC_NA);
|
|
att_all_tree = proto_item_add_subtree(ti, ett_stun_att_all);
|
|
|
|
while (offset < (STUN_HDR_LEN + msg_length)) {
|
|
att_type = tvb_get_ntohs(tvb, offset); /* Type field in attribute header */
|
|
att_length = tvb_get_ntohs(tvb, offset+2); /* Length field in attribute header */
|
|
attribute_name_str = val_to_str_ext_const(att_type, &attributes_ext, "Unknown");
|
|
if(att_all_tree){
|
|
ti = proto_tree_add_uint_format(att_all_tree, hf_stun_attr,
|
|
tvb, offset, ATTR_HDR_LEN+att_length,
|
|
att_type, "%s", attribute_name_str);
|
|
att_tree = proto_item_add_subtree(ti, ett_stun_att);
|
|
ti = proto_tree_add_uint(att_tree, hf_stun_att_type, tvb,
|
|
offset, 2, att_type);
|
|
att_type_tree = proto_item_add_subtree(ti, ett_stun_att_type);
|
|
proto_tree_add_uint(att_type_tree, hf_stun_att_type_comprehension, tvb, offset, 2, att_type);
|
|
proto_tree_add_uint(att_type_tree, hf_stun_att_type_assignment, tvb, offset, 2, att_type);
|
|
|
|
if ((offset+ATTR_HDR_LEN+att_length) > (STUN_HDR_LEN+msg_length+tcp_framing_offset)) {
|
|
proto_tree_add_uint_format_value(att_tree,
|
|
hf_stun_att_length, tvb, offset+2, 2,
|
|
att_length,
|
|
"%u (bogus, goes past the end of the message)",
|
|
att_length);
|
|
break;
|
|
}
|
|
}
|
|
offset += 2;
|
|
|
|
proto_tree_add_uint(att_tree, hf_stun_att_length, tvb,
|
|
offset, 2, att_length);
|
|
offset += 2;
|
|
|
|
switch (att_type) {
|
|
|
|
/* Deprecated STUN RFC3489 attributes */
|
|
case RESPONSE_ADDRESS:
|
|
case SOURCE_ADDRESS:
|
|
case CHANGED_ADDRESS:
|
|
case REFLECTED_FROM:
|
|
case DESTINATION_ADDRESS:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset, 1, ENC_NA);
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_port, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
switch (tvb_get_guint8(tvb, offset+1))
|
|
{
|
|
case 1:
|
|
if (att_length < 8)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_ipv4, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(att_tree, " (Deprecated): %s:%d", tvb_ip_to_str(tvb, offset+4),tvb_get_ntohs(tvb,offset+2));
|
|
|
|
break;
|
|
|
|
case 2:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_ipv6, tvb, offset+4, 16, ENC_NA);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
/* Deprecated STUN RFC3489 attributes */
|
|
case PASSWORD:
|
|
proto_tree_add_item(att_tree, hf_stun_att_password, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
proto_item_append_text(att_tree, " (Deprecated): %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, att_length, ENC_UTF_8|ENC_NA));
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding,
|
|
tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
|
|
case MAPPED_ADDRESS:
|
|
case ALTERNATE_SERVER:
|
|
case RESPONSE_ORIGIN:
|
|
case OTHER_ADDRESS:
|
|
case MS_ALT_MAPPED_ADDRESS:
|
|
{
|
|
const gchar *addr_str;
|
|
guint16 att_port;
|
|
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset, 1, ENC_NA);
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_port, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
att_port = tvb_get_ntohs(tvb, offset + 2);
|
|
|
|
switch (tvb_get_guint8(tvb, offset+1)) {
|
|
case 1:
|
|
if (att_length < 8)
|
|
break;
|
|
addr_str = tvb_ip_to_str(tvb, offset + 4);
|
|
proto_tree_add_item(att_tree, hf_stun_att_ipv4, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(att_tree, ": %s:%d", addr_str, att_port);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" %s: %s:%d",
|
|
attribute_name_str,
|
|
addr_str,
|
|
att_port
|
|
);
|
|
break;
|
|
|
|
case 2:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_ipv6, tvb, offset+4, 16, ENC_NA);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
case CHANGE_REQUEST:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_change_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_change_port, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case USERNAME:
|
|
{
|
|
const gchar *user_name_str;
|
|
|
|
proto_tree_add_item(att_tree, hf_stun_att_username, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
user_name_str = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, att_length, ENC_UTF_8 | ENC_NA);
|
|
proto_item_append_text(att_tree, ": %s", user_name_str);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" user: %s",
|
|
user_name_str);
|
|
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding,
|
|
tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
}
|
|
case MESSAGE_INTEGRITY:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_hmac, tvb, offset, att_length, ENC_NA);
|
|
break;
|
|
|
|
case ERROR_CODE:
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset, 2, ENC_NA);
|
|
if (att_length < 3)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_error_class, tvb, offset+2, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_error_number, tvb, offset+3, 1, ENC_BIG_ENDIAN);
|
|
{
|
|
int human_error_num = tvb_get_guint8(tvb, offset+2) * 100 + tvb_get_guint8(tvb, offset+3);
|
|
const gchar *error_str = val_to_str_ext_const(human_error_num, &error_code_ext, "*Unknown error code*");
|
|
proto_item_append_text(
|
|
att_tree,
|
|
" %d (%s)",
|
|
human_error_num, /* human readable error code */
|
|
error_str
|
|
);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" error-code: %d (%s)",
|
|
human_error_num,
|
|
error_str
|
|
);
|
|
}
|
|
if (att_length < 5)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_error_reason, tvb, offset + 4, att_length - 4, ENC_UTF_8 | ENC_NA);
|
|
{
|
|
const gchar *error_reas_str = tvb_get_string_enc(wmem_packet_scope(), tvb, offset + 4, att_length - 4, ENC_UTF_8 | ENC_NA);
|
|
|
|
proto_item_append_text(att_tree, ": %s", error_reas_str);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" %s",
|
|
error_reas_str
|
|
);
|
|
}
|
|
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
|
|
case UNKNOWN_ATTRIBUTES:
|
|
for (i = 0; i < att_length; i += 2)
|
|
proto_tree_add_item(att_tree, hf_stun_att_unknown, tvb, offset+i, 2, ENC_BIG_ENDIAN);
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
|
|
case REALM:
|
|
{
|
|
const gchar *realm_str = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, att_length, ENC_UTF_8 | ENC_NA);
|
|
proto_tree_add_item(att_tree, hf_stun_att_realm, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
proto_item_append_text(att_tree, ": %s", realm_str);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" realm: %s",
|
|
realm_str
|
|
);
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
}
|
|
case NONCE:
|
|
proto_tree_add_item(att_tree, hf_stun_att_nonce, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
proto_item_append_text(att_tree, ": %s", tvb_get_string_enc(wmem_packet_scope(), tvb, offset, att_length, ENC_UTF_8|ENC_NA));
|
|
col_append_str(
|
|
pinfo->cinfo, COL_INFO,
|
|
" with nonce"
|
|
);
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
|
|
case XOR_MAPPED_ADDRESS:
|
|
case XOR_PEER_ADDRESS:
|
|
case XOR_RELAYED_ADDRESS:
|
|
case XOR_RESPONSE_TARGET:
|
|
case XOR_REFLECTED_FROM:
|
|
case MS_XOR_MAPPED_ADDRESS:
|
|
case REMOTE_SITE_ADDR:
|
|
case REMOTE_RELAY_SITE:
|
|
case LOCAL_SITE_ADDR:
|
|
case LOCAL_RELAY_SITE:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset, 1, ENC_NA);
|
|
if (att_length < 2)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_family, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_xor_port, tvb, offset+2, 2, ENC_NA);
|
|
|
|
/* Show the port 'in the clear'
|
|
XOR (host order) transid with (host order) xor-port.
|
|
Add host-order port into tree. */
|
|
ti = proto_tree_add_uint(att_tree, hf_stun_att_port, tvb, offset+2, 2,
|
|
tvb_get_ntohs(tvb, offset+2) ^ (magic_cookie_first_word >> 16));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
if (att_length < 8)
|
|
break;
|
|
switch (tvb_get_guint8(tvb, offset+1)) {
|
|
case 1:
|
|
proto_tree_add_item(att_tree, hf_stun_att_xor_ipv4, tvb, offset+4, 4, ENC_NA);
|
|
|
|
/* Show the address 'in the clear'.
|
|
XOR (host order) transid with (host order) xor-address.
|
|
Add in network order tree. */
|
|
ti = proto_tree_add_ipv4(att_tree, hf_stun_att_ipv4, tvb, offset+4, 4,
|
|
tvb_get_ipv4(tvb, offset+4) ^ g_htonl(magic_cookie_first_word));
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
{
|
|
const gchar *ipstr;
|
|
address addr;
|
|
guint32 ip;
|
|
guint16 port;
|
|
ip = tvb_get_ipv4(tvb, offset+4) ^ g_htonl(magic_cookie_first_word);
|
|
set_address(&addr, AT_IPv4, 4, &ip);
|
|
ipstr = address_to_str(wmem_packet_scope(), &addr);
|
|
port = tvb_get_ntohs(tvb, offset+2) ^ (magic_cookie_first_word >> 16);
|
|
proto_item_append_text(att_tree, ": %s:%d", ipstr, port);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" %s: %s:%d",
|
|
attribute_name_str,
|
|
ipstr,
|
|
port
|
|
);
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
if (att_length < 20)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_xor_ipv6, tvb, offset+4, 16, ENC_NA);
|
|
{
|
|
guint32 IPv6[4];
|
|
tvb_get_ipv6(tvb, offset+4, (struct e_in6_addr *)IPv6);
|
|
IPv6[0] = IPv6[0] ^ g_htonl(magic_cookie_first_word);
|
|
IPv6[1] = IPv6[1] ^ g_htonl(transaction_id[0]);
|
|
IPv6[2] = IPv6[2] ^ g_htonl(transaction_id[1]);
|
|
IPv6[3] = IPv6[3] ^ g_htonl(transaction_id[2]);
|
|
ti = proto_tree_add_ipv6(att_tree, hf_stun_att_ipv6, tvb, offset+4, 16,
|
|
(const struct e_in6_addr *)IPv6);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case REQUESTED_ADDRESS_TYPE:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_family, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset+1, 3, ENC_NA);
|
|
break;
|
|
case EVEN_PORT:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserve_next, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case RESERVATION_TOKEN:
|
|
if (att_length < 8)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_token, tvb, offset, 8, ENC_NA);
|
|
break;
|
|
|
|
case PRIORITY:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_priority, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case PADDING:
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset, att_length, att_length);
|
|
break;
|
|
|
|
case ICMP:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_icmp_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_icmp_code, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case SOFTWARE:
|
|
proto_tree_add_item(att_tree, hf_stun_att_software, tvb, offset, att_length, ENC_UTF_8|ENC_NA);
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
|
|
case CACHE_TIMEOUT:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_cache_timeout, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case FINGERPRINT:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_crc32, tvb, offset, att_length, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case ICE_CONTROLLED:
|
|
case ICE_CONTROLLING:
|
|
if (att_length < 8)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_tie_breaker, tvb, offset, 8, ENC_NA);
|
|
break;
|
|
|
|
case DATA:
|
|
if (att_length > 0) {
|
|
tvbuff_t *next_tvb;
|
|
proto_tree_add_item(att_tree, hf_stun_att_value, tvb, offset, att_length, ENC_NA);
|
|
if (att_length % 4 != 0) {
|
|
guint pad;
|
|
pad = 4-(att_length % 4);
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb, offset+att_length, pad, pad);
|
|
}
|
|
|
|
next_tvb = tvb_new_subset_length(tvb, offset, att_length);
|
|
|
|
if (!dissector_try_heuristic(heur_subdissector_list, next_tvb, pinfo, att_tree, &hdtbl_entry, NULL)) {
|
|
call_dissector_only(data_handle, next_tvb, pinfo, att_tree, NULL);
|
|
}
|
|
|
|
}
|
|
break;
|
|
|
|
case REQUESTED_TRANSPORT:
|
|
if (att_length < 1)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_transp, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
if (att_length < 4)
|
|
break;
|
|
|
|
{
|
|
guint8 protoCode = tvb_get_guint8(tvb, offset);
|
|
const gchar *protoCode_str = val_to_str(protoCode, transportnames, "Unknown (0x%8x)");
|
|
|
|
proto_item_append_text(att_tree, ": %s", protoCode_str);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" %s",
|
|
protoCode_str
|
|
);
|
|
}
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset+1, 3, ENC_NA);
|
|
break;
|
|
|
|
case CHANNEL_NUMBER:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_channelnum, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
{
|
|
guint16 chan = tvb_get_ntohs(tvb, offset);
|
|
proto_item_append_text(att_tree, ": 0x%x", chan);
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" ChannelNumber=0x%x",
|
|
chan
|
|
);
|
|
}
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset+2, 2, ENC_NA);
|
|
break;
|
|
|
|
case MAGIC_COOKIE:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_magic_cookie, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case BANDWIDTH:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(att_tree, " %d", tvb_get_ntohl(tvb, offset));
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" bandwidth: %d",
|
|
tvb_get_ntohl(tvb, offset)
|
|
);
|
|
break;
|
|
case LIFETIME:
|
|
if (att_length < 4)
|
|
break;
|
|
proto_tree_add_item(att_tree, hf_stun_att_lifetime, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(att_tree, " %d", tvb_get_ntohl(tvb, offset));
|
|
col_append_fstr(
|
|
pinfo->cinfo, COL_INFO,
|
|
" lifetime: %d",
|
|
tvb_get_ntohl(tvb, offset)
|
|
);
|
|
break;
|
|
|
|
case MS_VERSION:
|
|
case MS_IMPLEMENTATION_VER:
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_version, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_item_append_text(att_tree, ": %s", val_to_str(tvb_get_ntohl(tvb, offset), ms_version_vals, "Unknown (0x%u)"));
|
|
break;
|
|
case MS_SEQUENCE_NUMBER:
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_connection_id, tvb, offset, 20, ENC_NA);
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_sequence_number, tvb, offset+20, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case MS_SERVICE_QUALITY:
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_stream_type, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_service_quality, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BANDWIDTH_ACM:
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset, 2, ENC_NA);
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_acm_type, tvb, offset+2, 2, ENC_BIG_ENDIAN);
|
|
break;
|
|
case BANDWIDTH_RSV_ID:
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_rsv_id, tvb, offset, 16, ENC_NA);
|
|
break;
|
|
case BANDWIDTH_RSV_AMOUNT:
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_rsv_amount_masb, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_rsv_amount_misb, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_rsv_amount_marb, tvb, offset+8, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_bandwidth_rsv_amount_mirb, tvb, offset+12, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case REMOTE_SITE_ADDR_RP:
|
|
case LOCAL_SITE_ADDR_RP:
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_a, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_b, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_rsv1, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_masb, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_marb, tvb, offset+8, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case REMOTE_RELAY_SITE_RP:
|
|
case LOCAL_RELAY_SITE_RP:
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_a, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_rsv2, tvb, offset, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_masb, tvb, offset+4, 4, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_address_rp_marb, tvb, offset+8, 4, ENC_BIG_ENDIAN);
|
|
break;
|
|
case SIP_DIALOG_ID:
|
|
proto_tree_add_item(att_tree, hf_stun_att_sip_dialog_id, tvb, offset, att_length, ENC_NA);
|
|
break;
|
|
case SIP_CALL_ID:
|
|
proto_tree_add_item(att_tree, hf_stun_att_sip_call_id, tvb, offset, att_length, ENC_NA);
|
|
break;
|
|
case LOCATION_PROFILE:
|
|
proto_tree_add_item(att_tree, hf_stun_att_lp_peer_location, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_lp_self_location, tvb, offset+1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_lp_federation, tvb, offset+2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(att_tree, hf_stun_att_reserved, tvb, offset+3, 1, ENC_NA);
|
|
break;
|
|
case MS_CANDIDATE_IDENTIFIER:
|
|
proto_tree_add_item(att_tree, hf_stun_att_ms_foundation, tvb, offset, 4, ENC_ASCII|ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
if (att_length > 0)
|
|
proto_tree_add_item(att_tree, hf_stun_att_value, tvb, offset, att_length, ENC_NA);
|
|
if (att_length % 4 != 0)
|
|
proto_tree_add_uint(att_tree, hf_stun_att_padding, tvb,
|
|
offset+att_length, 4-(att_length % 4), 4-(att_length % 4));
|
|
break;
|
|
}
|
|
offset += (att_length+3) & ~0x3;
|
|
}
|
|
}
|
|
|
|
if (heur_check && is_turn && conversation) {
|
|
/*
|
|
* When in heuristic dissector mode, if this is a TURN message, set
|
|
* the 5-tuple conversation to always decode as non-heuristic. The
|
|
* odds of incorrectly identifying a random packet as a TURN message
|
|
* (other than ChannelData) is incredibly small. A ChannelData message
|
|
* won't be matched when in heuristic mode, so heur_check can't be true
|
|
* in that case and get to this part of the code.
|
|
*/
|
|
if (pinfo->ptype == PT_TCP) {
|
|
conversation_set_dissector(conversation, stun_tcp_handle);
|
|
} else if (pinfo->ptype == PT_UDP) {
|
|
conversation_set_dissector(conversation, stun_udp_handle);
|
|
}
|
|
}
|
|
|
|
if (!PINFO_FD_VISITED(pinfo) && is_turn && (pinfo->ptype == PT_TCP)
|
|
&& (msg_type_method == CONNECTION_BIND) && (msg_type_class == RESPONSE)) {
|
|
/* RFC 6062: after the ConnectionBind exchange, the connection is no longer framed as TURN;
|
|
instead, it is an unframed pass-through.
|
|
Starting from next frame set conversation dissector to data */
|
|
conversation_set_dissector_from_frame_number(conversation, pinfo->fd->num+1, data_handle);
|
|
}
|
|
return reported_length;
|
|
}
|
|
|
|
static int
|
|
dissect_stun_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
return dissect_stun_message(tvb, pinfo, tree, FALSE, TRUE);
|
|
}
|
|
|
|
static int
|
|
dissect_stun_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
return dissect_stun_message(tvb, pinfo, tree, FALSE, FALSE);
|
|
}
|
|
|
|
static int
|
|
dissect_stun_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
|
|
{
|
|
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, MIN_HDR_LEN,
|
|
get_stun_message_len, dissect_stun_tcp_pdu, data);
|
|
return tvb_reported_length(tvb);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_stun_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
if (dissect_stun_message(tvb, pinfo, tree, TRUE, TRUE) == 0) {
|
|
/*
|
|
* It wasn't a valid STUN message, and wasn't
|
|
* dissected as such.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
proto_register_stun(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_stun_channel,
|
|
{ "Channel Number", "stun.channel", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
|
|
/* ////////////////////////////////////// */
|
|
{ &hf_stun_tcp_frame_length,
|
|
{ "TCP Frame Length", "stun.tcp_frame_length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_type,
|
|
{ "Message Type", "stun.type", FT_UINT16,
|
|
BASE_HEX, NULL,0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_type_class,
|
|
{ "Message Class", "stun.type.class", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0110, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_type_method,
|
|
{ "Message Method", "stun.type.method", FT_UINT16,
|
|
BASE_HEX, NULL, 0x3EEF, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_type_method_assignment,
|
|
{ "Message Method Assignment", "stun.type.method-assignment", FT_UINT16,
|
|
BASE_HEX, VALS(assignments), 0x2000, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_length,
|
|
{ "Message Length", "stun.length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_cookie,
|
|
{ "Message Cookie", "stun.cookie", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_id,
|
|
{ "Message Transaction ID", "stun.id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_attributes,
|
|
{ "Attributes", "stun.attributes", FT_NONE,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_attr,
|
|
{ "Attribute Type", "stun.attribute", FT_UINT16,
|
|
BASE_HEX, NULL, 0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_response_in,
|
|
{ "Response In", "stun.response-in", FT_FRAMENUM,
|
|
BASE_NONE, NULL, 0x0, "The response to this STUN query is in this frame", HFILL }
|
|
},
|
|
{ &hf_stun_response_to,
|
|
{ "Request In", "stun.response-to", FT_FRAMENUM,
|
|
BASE_NONE, NULL, 0x0, "This is a response to the STUN Request in this frame", HFILL }
|
|
},
|
|
{ &hf_stun_time,
|
|
{ "Time", "stun.time", FT_RELATIVE_TIME,
|
|
BASE_NONE, NULL, 0x0, "The time between the Request and the Response", HFILL }
|
|
},
|
|
{ &hf_stun_duplicate,
|
|
{ "Duplicated original message in", "stun.reqduplicate", FT_FRAMENUM,
|
|
BASE_NONE, NULL, 0x0, "This is a duplicate of STUN message in this frame", HFILL }
|
|
},
|
|
/* ////////////////////////////////////// */
|
|
{ &hf_stun_att_type,
|
|
{ "Attribute Type", "stun.att.type", FT_UINT16,
|
|
BASE_HEX | BASE_EXT_STRING, &attributes_ext, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_type_comprehension,
|
|
{ "Attribute Type Comprehension", "stun.att.type.comprehension", FT_UINT16,
|
|
BASE_HEX, VALS(comprehensions), 0x8000, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_type_assignment,
|
|
{ "Attribute Type Assignment", "stun.att.type.assignment", FT_UINT16,
|
|
BASE_HEX, VALS(assignments), 0x4000, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_length,
|
|
{ "Attribute Length", "stun.att.length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_family,
|
|
{ "Protocol Family", "stun.att.family", FT_UINT8,
|
|
BASE_HEX, VALS(attributes_family), 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_ipv4,
|
|
{ "IP", "stun.att.ipv4", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_ipv6,
|
|
{ "IP", "stun.att.ipv6", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_port,
|
|
{ "Port", "stun.att.port", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_username,
|
|
{ "Username", "stun.att.username", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_password,
|
|
{ "Password", "stun.att.password", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_padding,
|
|
{ "Padding", "stun.att.padding", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_hmac,
|
|
{ "HMAC-SHA1", "stun.att.hmac", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_crc32,
|
|
{ "CRC-32", "stun.att.crc32", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_error_class,
|
|
{ "Error Class","stun.att.error.class", FT_UINT8,
|
|
BASE_DEC, NULL, 0x07, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_error_number,
|
|
{ "Error Code","stun.att.error", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_error_reason,
|
|
{ "Error Reason Phrase","stun.att.error.reason", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_realm,
|
|
{ "Realm", "stun.att.realm", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_nonce,
|
|
{ "Nonce", "stun.att.nonce", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_unknown,
|
|
{ "Unknown Attribute","stun.att.unknown", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_xor_ipv4,
|
|
{ "IP (XOR-d)", "stun.att.ipv4-xord", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_xor_ipv6,
|
|
{ "IP (XOR-d)", "stun.att.ipv6-xord", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_xor_port,
|
|
{ "Port (XOR-d)", "stun.att.port-xord", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_icmp_type,
|
|
{ "ICMP type", "stun.att.icmp.type", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_icmp_code,
|
|
{ "ICMP code", "stun.att.icmp.code", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_software,
|
|
{ "Software","stun.att.software", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_priority,
|
|
{ "Priority", "stun.att.priority", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_tie_breaker,
|
|
{ "Tie breaker", "stun.att.tie-breaker", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_lifetime,
|
|
{ "Lifetime", "stun.att.lifetime", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_change_ip,
|
|
{ "Change IP","stun.att.change-ip", FT_BOOLEAN,
|
|
16, TFS(&tfs_set_notset), 0x0004, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_change_port,
|
|
{ "Change Port","stun.att.change-port", FT_BOOLEAN,
|
|
16, TFS(&tfs_set_notset), 0x0002, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_reserve_next,
|
|
{ "Reserve next","stun.att.even-port.reserve-next", FT_UINT8,
|
|
BASE_DEC, VALS(attributes_reserve_next), 0x80, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_cache_timeout,
|
|
{ "Cache timeout", "stun.att.cache-timeout", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_token,
|
|
{ "Token", "stun.att.token", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_value,
|
|
{ "Value", "stun.value", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_reserved,
|
|
{ "Reserved", "stun.att.reserved", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_transp,
|
|
{ "Transport", "stun.att.transp", FT_UINT8,
|
|
BASE_HEX, VALS(transportnames), 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_channelnum,
|
|
{ "Channel-Number", "stun.att.channelnum", FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_magic_cookie,
|
|
{ "Magic Cookie", "stun.att.magic_cookie", FT_UINT32,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_stun_att_bandwidth,
|
|
{ "Bandwidth", "stun.port.bandwidth", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }
|
|
},
|
|
|
|
{ &hf_stun_att_ms_version,
|
|
{ "MS Version", "stun.att.ms.version", FT_UINT32,
|
|
BASE_DEC, VALS(ms_version_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_ms_connection_id,
|
|
{ "Connection ID", "stun.att.ms.connection_id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_ms_sequence_number,
|
|
{ "Sequence Number", "stun.att.ms.sequence_number", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_ms_stream_type,
|
|
{ "Stream Type", "stun.att.ms.stream_type", FT_UINT16,
|
|
BASE_DEC, VALS(ms_stream_type_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_ms_service_quality,
|
|
{ "Service Quality", "stun.att.ms.service_quality", FT_UINT16,
|
|
BASE_DEC, VALS(ms_service_quality_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_ms_foundation,
|
|
{ "Foundation", "stun.att.ms.foundation", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_acm_type,
|
|
{ "Message Type", "stun.att.bandwidth_acm.type", FT_UINT16,
|
|
BASE_DEC, VALS(bandwidth_acm_type_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_rsv_id,
|
|
{ "Reservation ID", "stun.att.bandwidth_rsv_id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_rsv_amount_misb,
|
|
{ "Minimum Send Bandwidth", "stun.att.bandwidth_rsv_amount.misb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_rsv_amount_masb,
|
|
{ "Maximum Send Bandwidth", "stun.att.bandwidth_rsv_amount.masb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_rsv_amount_mirb,
|
|
{ "Minimum Receive Bandwidth", "stun.att.bandwidth_rsv_amount.mirb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_bandwidth_rsv_amount_marb,
|
|
{ "Maximum Receive Bandwidth", "stun.att.bandwidth_rsv_amount.marb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_a,
|
|
{ "Valid", "stun.att.address_rp.valid", FT_BOOLEAN,
|
|
32, TFS(&tfs_yes_no), 0x80000000, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_b,
|
|
{ "PSTN", "stun.att.address_rp.valid", FT_BOOLEAN,
|
|
32, TFS(&tfs_yes_no), 0x40000000, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_rsv1,
|
|
{ "Reserved", "stun.att.address_rp.reserved", FT_UINT32,
|
|
BASE_HEX, NULL, 0x3FFFFFFF, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_rsv2,
|
|
{ "Reserved", "stun.att.address_rp.reserved", FT_UINT32,
|
|
BASE_HEX, NULL, 0x7FFFFFFF, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_masb,
|
|
{ "Maximum Send Bandwidth", "stun.att.adress_rp.masb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_address_rp_marb,
|
|
{ "Maximum Receive Bandwidth", "stun.att.adress_rp.marb", FT_UINT32,
|
|
BASE_DEC, NULL, 0x0, "In kilobits per second", HFILL}
|
|
},
|
|
{ &hf_stun_att_sip_dialog_id,
|
|
{ "SIP Dialog ID", "stun.att.sip_dialog_id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_sip_call_id,
|
|
{ "SIP Call ID", "stun.att.sip_call_id", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_lp_peer_location,
|
|
{ "Peer Location", "stun.att.lp.peer_location", FT_UINT8,
|
|
BASE_DEC, VALS(location_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_lp_self_location,
|
|
{ "Self Location", "stun.att.lp.seft_location", FT_UINT8,
|
|
BASE_DEC, VALS(location_vals), 0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_stun_att_lp_federation,
|
|
{ "Federation", "stun.att.lp.federation", FT_UINT8,
|
|
BASE_DEC, VALS(federation_vals), 0x0, NULL, HFILL}
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_stun,
|
|
&ett_stun_type,
|
|
&ett_stun_att_all,
|
|
&ett_stun_att,
|
|
&ett_stun_att_type,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_stun = proto_register_protocol("Session Traversal Utilities for NAT", "STUN", "stun");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_stun, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* heuristic subdissectors (used for the DATA field) */
|
|
heur_subdissector_list = register_heur_dissector_list("stun");
|
|
|
|
register_dissector("stun-udp", dissect_stun_udp, proto_stun);
|
|
register_dissector("stun-heur", dissect_stun_heur, proto_stun);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_stun(void)
|
|
{
|
|
stun_tcp_handle = create_dissector_handle(dissect_stun_tcp, proto_stun);
|
|
stun_udp_handle = create_dissector_handle(dissect_stun_udp, proto_stun);
|
|
|
|
dissector_add_uint("tcp.port", TCP_PORT_STUN, stun_tcp_handle);
|
|
dissector_add_uint("udp.port", UDP_PORT_STUN, stun_udp_handle);
|
|
|
|
/* Used for "Decode As" in case STUN negotiation isn't captured */
|
|
dissector_add_for_decode_as("tcp.port", stun_tcp_handle);
|
|
dissector_add_for_decode_as("udp.port", stun_udp_handle);
|
|
|
|
heur_dissector_add("udp", dissect_stun_heur, "STUN over UDP", "stun_udp", proto_stun, HEURISTIC_ENABLE);
|
|
|
|
data_handle = find_dissector("data");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines
|
|
*
|
|
* Local Variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* ex: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|