forked from osmocom/wireshark
f4b0abc729
They already know who they are when they register themselves. Saving the handle then to avoid finding it later. Not sure if this will increase unnecessary register_dissector functions (instead of using create_dissector_handle in proto_reg_handoff function) when other dissectors copy/paste, but it should make startup time a few microseconds better. Change-Id: I3839be791b32b84887ac51a6a65fb5733e9f1f43 Reviewed-on: https://code.wireshark.org/review/19481 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Anders Broman <a.broman58@gmail.com>
3292 lines
128 KiB
C
3292 lines
128 KiB
C
/* packet-sdp.c
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* Routines for SDP packet disassembly (RFC 2327)
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*
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* Jason Lango <jal@netapp.com>
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* Liberally copied from packet-http.c, by Guy Harris <guy@alum.mit.edu>
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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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* Ref http://www.ietf.org/rfc/rfc4566.txt?number=4566
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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/exceptions.h>
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#include <epan/asn1.h>
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include <epan/tap.h>
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#include <epan/rtp_pt.h>
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#include <epan/show_exception.h>
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#include <epan/addr_resolv.h>
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#include <epan/proto_data.h>
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#include <wsutil/strtoi.h>
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#include "packet-sdp.h"
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/* un-comment the following as well as this line in conversation.c, to enable debug printing */
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/* #define DEBUG_CONVERSATION */
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#include "conversation_debug.h"
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#include "packet-rtp.h"
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#include "packet-rtcp.h"
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#include "packet-t38.h"
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#include "packet-msrp.h"
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#include "packet-sprt.h"
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#include "packet-h245.h"
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#include "packet-h264.h"
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#include "packet-mp4ves.h"
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void proto_register_sdp(void);
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void proto_reg_handoff_sdp(void);
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static dissector_handle_t sdp_handle;
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static dissector_handle_t rtcp_handle;
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static dissector_handle_t sprt_handle;
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static dissector_handle_t msrp_handle;
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static dissector_handle_t h264_handle;
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static dissector_handle_t mp4ves_config_handle;
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static int sdp_tap = -1;
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static int proto_sdp = -1;
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static int proto_sprt = -1;
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static const char* UNKNOWN_ENCODING = "Unknown";
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static wmem_tree_t *sdp_transport_reqs = NULL;
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static wmem_tree_t *sdp_transport_rsps = NULL;
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/* preference globals */
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static gboolean global_sdp_establish_conversation = TRUE;
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/* Top level fields */
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static int hf_protocol_version = -1;
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static int hf_owner = -1;
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static int hf_session_name = -1;
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static int hf_session_info = -1;
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static int hf_uri = -1;
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static int hf_email = -1;
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static int hf_phone = -1;
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static int hf_connection_info = -1;
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static int hf_bandwidth = -1;
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static int hf_timezone = -1;
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static int hf_encryption_key = -1;
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static int hf_session_attribute = -1;
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static int hf_media_attribute = -1;
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static int hf_time = -1;
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static int hf_repeat_time = -1;
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static int hf_media = -1;
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static int hf_media_title = -1;
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static int hf_unknown = -1;
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static int hf_invalid = -1;
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static int hf_ipbcp_version = -1;
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static int hf_ipbcp_type = -1;
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/* hf_owner subfields*/
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static int hf_owner_username = -1;
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static int hf_owner_sessionid = -1;
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static int hf_owner_version = -1;
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static int hf_owner_network_type = -1;
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static int hf_owner_address_type = -1;
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static int hf_owner_address = -1;
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/* hf_connection_info subfields */
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static int hf_connection_info_network_type = -1;
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static int hf_connection_info_address_type = -1;
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static int hf_connection_info_connection_address = -1;
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static int hf_connection_info_ttl = -1;
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static int hf_connection_info_num_addr = -1;
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/* hf_bandwidth subfields */
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static int hf_bandwidth_modifier = -1;
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static int hf_bandwidth_value = -1;
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/* hf_time subfields */
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static int hf_time_start = -1;
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static int hf_time_stop = -1;
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/* hf_repeat_time subfield */
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static int hf_repeat_time_interval = -1;
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static int hf_repeat_time_duration = -1;
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static int hf_repeat_time_offset = -1;
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/* hf_timezone subfields */
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static int hf_timezone_time = -1;
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static int hf_timezone_offset = -1;
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/* hf_encryption_key subfields */
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static int hf_encryption_key_type = -1;
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static int hf_encryption_key_data = -1;
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/* hf_session_attribute subfields */
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static int hf_session_attribute_field = -1;
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static int hf_session_attribute_value = -1;
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/* hf_media subfields */
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static int hf_media_media = -1;
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static int hf_media_port = -1;
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static int hf_media_port_string = -1;
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static int hf_media_portcount = -1;
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static int hf_media_proto = -1;
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static int hf_media_format = -1;
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/* hf_session_attribute subfields */
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static int hf_media_attribute_field = -1;
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static int hf_media_attribute_value = -1;
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static int hf_media_encoding_name = -1;
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static int hf_media_sample_rate = -1;
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static int hf_media_format_specific_parameter = -1;
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static int hf_sdp_fmtp_mpeg4_profile_level_id = -1;
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static int hf_sdp_fmtp_h263_profile = -1;
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static int hf_sdp_fmtp_h263_level = -1;
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static int hf_sdp_h264_packetization_mode = -1;
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static int hf_SDPh223LogicalChannelParameters = -1;
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/* hf_session_attribute hf_media_attribute subfields */
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static int hf_key_mgmt_att_value = -1;
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static int hf_key_mgmt_prtcl_id = -1;
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static int hf_key_mgmt_data = -1;
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static int hf_sdp_crypto_tag = -1;
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static int hf_sdp_crypto_crypto_suite = -1;
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static int hf_sdp_crypto_master_key = -1;
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static int hf_sdp_crypto_master_salt = -1;
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static int hf_sdp_crypto_lifetime = -1;
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static int hf_sdp_crypto_mki = -1;
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static int hf_sdp_crypto_mki_length = -1;
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/* a=candidate subfields */
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static int hf_ice_candidate_foundation = -1;
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static int hf_ice_candidate_componentid = -1;
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static int hf_ice_candidate_transport = -1;
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static int hf_ice_candidate_priority = -1;
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static int hf_ice_candidate_address = -1;
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static int hf_ice_candidate_port = -1;
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static int hf_ice_candidate_type = -1;
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/* Generated from convert_proto_tree_add_text.pl */
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static int hf_sdp_nal_unit_2_string = -1;
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static int hf_sdp_key_and_salt = -1;
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static int hf_sdp_nal_unit_1_string = -1;
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static int hf_sdp_data = -1;
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/* trees */
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static int ett_sdp = -1;
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static int ett_sdp_owner = -1;
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static int ett_sdp_connection_info = -1;
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static int ett_sdp_bandwidth = -1;
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static int ett_sdp_time = -1;
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static int ett_sdp_repeat_time = -1;
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static int ett_sdp_timezone = -1;
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static int ett_sdp_encryption_key = -1;
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static int ett_sdp_session_attribute = -1;
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static int ett_sdp_media = -1;
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static int ett_sdp_media_attribute = -1;
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static int ett_sdp_fmtp = -1;
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static int ett_sdp_key_mgmt = -1;
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static int ett_sdp_crypto_key_parameters = -1;
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static expert_field ei_sdp_invalid_key_param = EI_INIT;
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static expert_field ei_sdp_invalid_line_equal = EI_INIT;
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static expert_field ei_sdp_invalid_line_fields = EI_INIT;
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static expert_field ei_sdp_invalid_line_space = EI_INIT;
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static expert_field ei_sdp_invalid_conversion = EI_INIT;
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static expert_field ei_sdp_invalid_media_port = EI_INIT;
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static expert_field ei_sdp_invalid_sample_rate = EI_INIT;
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static expert_field ei_sdp_invalid_media_format = EI_INIT;
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static expert_field ei_sdp_invalid_crypto_tag = EI_INIT;
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static expert_field ei_sdp_invalid_crypto_mki_length = EI_INIT;
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/* patterns used for tvb_ws_mempbrk_pattern_guint8 */
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static ws_mempbrk_pattern pbrk_digits;
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static ws_mempbrk_pattern pbrk_alpha;
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typedef enum {
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SDP_PROTO_UNKNOWN = 0,
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SDP_PROTO_RTP,
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SDP_PROTO_SRTP,
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SDP_PROTO_T38,
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SDP_PROTO_MSRP,
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SDP_PROTO_SPRT,
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} transport_proto_t;
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#define SDP_MAX_RTP_CHANNELS 4
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#define SDP_MAX_RTP_PAYLOAD_TYPES 20
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#define SDP_NO_OF_PT 128
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/*
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* All parameters specific to one media description ("m=").
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*/
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typedef struct {
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gint32 pt[SDP_MAX_RTP_PAYLOAD_TYPES];
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gint8 pt_count;
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rtp_dyn_payload_t *rtp_dyn_payload;
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gboolean set_rtp;
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} transport_media_pt_t;
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/*
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* Store data extracted from one Media Description section of a SDP. Memory is
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* allocated in wmem_file_scope().
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*/
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typedef struct {
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transport_proto_t proto; /**< Protocol, parsed from "m=" line. */
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gboolean is_video; /**< Whether "m=video" */
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guint16 media_port; /**< Port number, parsed from "m=" line. */
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address conn_addr; /**< The address from the "c=" line (default
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from session level, possibly overridden at
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the media level). */
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transport_media_pt_t media; /**< Information about payload numbers for this media. */
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/*
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* Media-level only attributes.
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*/
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union {
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struct {
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address ipaddr;
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guint16 port_number;
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} msrp; /**< MSRP transport info, parsed from "a=label:" */
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} media_attr;
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} media_description_t;
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/*
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* Information parsed from one or two (offer/answer) SDPs that is stored in the
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* conversation. The contents are allocated within wmem_file_scope().
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*/
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typedef struct {
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enum sdp_exchange_type sdp_status;
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char *encoding_name[SDP_NO_OF_PT];
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int sample_rate[SDP_NO_OF_PT];
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/* Data parsed from "m=" */
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wmem_array_t *media_descriptions; /* array of media_description_t */
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/* SRTP related info XXX note currently we only handle one crypto line in the SDP
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* We should probably handle offer/answer and session updates etc(SIP) quite possibly the whole handling of
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* seting up the RTP conversations should be done by the signaling protocol(s) calling the SDP dissector
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* and the SDP dissector just provide the relevant data.
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* YES! packet-sdp.c should be about SDP parsing... SDP *state* needs to be maintained by upper
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* protocols, because each one has different rules/semantics.
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*/
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guint encryption_algorithm;
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guint auth_algorithm;
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guint mki_len; /* number of octets used for the MKI in the RTP payload */
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guint auth_tag_len; /* number of octets used for the Auth Tag in the RTP payload */
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} transport_info_t;
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/*
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* Information about the session description. These are accumulated while
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* parsing the session description and will be applied to the media description.
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* Memory scope can be wmem_packet_scope() since the contents are no longer
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* needed once they are processed into transport_info_t (via
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* complete_descriptions).
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*/
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typedef struct {
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address conn_addr; /**< Parsed from "c=" line. */
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rtp_dyn_payload_t *rtp_dyn_payload; /**< Parsed from "a=rtpmap:" line.
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Note: wmem_file_scope, needs manual dealloc. */
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} session_info_t;
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/* Structure for private data to hold ED137 related values */
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typedef struct sdp_data_t {
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char *ed137_type; /* Radio session type */
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char *ed137_txrxmode; /* Tx/Rx mode */
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char *ed137_fid; /* Frequency ID */
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} sdp_data_t;
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/* here lie the debugging dumper functions */
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#ifdef DEBUG_CONVERSATION
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static void sdp_dump_transport_media(const transport_media_pt_t* media) {
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int i;
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int count;
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DPRINT2(("transport_media contents:"));
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DINDENT();
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if (!media) {
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DPRINT2(("null transport_media_pt_t*"));
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DENDENT();
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return;
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}
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count = (int)media->pt_count;
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DPRINT2(("pt_count=%d",count));
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DINDENT();
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for (i=0; i < count; i++) {
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DPRINT2(("pt=%d", media->pt[i]));
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}
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DENDENT();
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DPRINT2(("rtp_dyn_payload hashtable=%s", media->rtp_dyn_payload ? "YES" : "NO"));
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if (media->rtp_dyn_payload) {
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rtp_dump_dyn_payload(media->rtp_dyn_payload);
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}
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DPRINT2(("set_rtp=%s", media->set_rtp ? "TRUE" : "FALSE"));
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DENDENT();
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}
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static const value_string sdp_exchange_type_vs[] = {
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{ SDP_EXCHANGE_OFFER, "SDP_EXCHANGE_OFFER" },
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{ SDP_EXCHANGE_ANSWER_ACCEPT, "SDP_EXCHANGE_ANSWER_ACCEPT" },
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{ SDP_EXCHANGE_ANSWER_REJECT, "SDP_EXCHANGE_ANSWER_REJECT" },
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{ 0, NULL }
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};
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static void sdp_dump_transport_info(const transport_info_t* info) {
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int i;
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int count;
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DPRINT2(("transport_info contents:"));
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DINDENT();
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if (!info) {
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DPRINT2(("null transport_info_t*"));
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DENDENT();
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return;
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}
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DPRINT2(("sdp_status=%s",
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val_to_str(info->sdp_status, sdp_exchange_type_vs, "SDP_EXCHANGE_UNKNOWN")));
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DPRINT2(("payload type contents:"));
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DINDENT();
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for (i=0; i < SDP_NO_OF_PT; i++) {
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/* don't print out unknown encodings */
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if (info->encoding_name[i] &&
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strcmp(UNKNOWN_ENCODING,info->encoding_name[i]) != 0) {
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DPRINT2(("payload type #%d:",i));
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DINDENT();
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DPRINT2(("encoding_name=%s", info->encoding_name[i]));
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DPRINT2(("sample_rate=%d", info->sample_rate[i]));
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DENDENT();
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}
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}
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DENDENT();
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count = wmem_array_get_count(info->media_descriptions);
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DPRINT2(("media_count=%d", count));
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DPRINT2(("rtp channels:"));
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DINDENT();
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for (i=0; i < count; i++) {
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media_description_t *media_desc = (media_description_t *)wmem_array_index(info->media_descriptions, i);
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DPRINT2(("channel #%d:",i));
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DINDENT();
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DPRINT2(("conn_addr=%s",
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address_to_str(wmem_packet_scope(), &(media_desc->conn_addr))));
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DPRINT2(("media_port=%d", media_desc->media_port));
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DPRINT2(("proto=%d", media_desc->proto));
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sdp_dump_transport_media(&(media_desc->media));
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DENDENT();
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}
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DENDENT();
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DPRINT2(("encryption_algorithm=%u", info->encryption_algorithm));
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DPRINT2(("auth_algorithm=%u", info->auth_algorithm));
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if (info->encryption_algorithm || info->auth_algorithm) {
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DPRINT2(("mki_len=%u", info->mki_len));
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if (info->auth_algorithm) {
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DPRINT2(("auth_tag_len=%u", info->auth_tag_len));
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}
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}
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DENDENT();
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}
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|
|
#endif /* DEBUG_CONVERSATION */
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|
|
|
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/* key-mgmt dissector
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* IANA registry:
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|
* http://www.iana.org/assignments/sdp-parameters
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*/
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|
static dissector_table_t key_mgmt_dissector_table;
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|
|
|
/* Finds next token (sequence of non-space chars) in tvb from given offset.
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|
* The returned value is the token length, or 0 if none found.
|
|
* The offset is changed to be the starting offset, in case there were one or more
|
|
* spaces at the beginning. (this will also add expert info in such a case)
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|
* The next_offset is set to the next found space after the token, or -1 if the
|
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* end of line is hit or no token found.
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|
* If this is the last token in the line, tokenlen will not be 0, but next_offset
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* will be -1.
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*
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* The optional param, if TRUE, means no expert error will be issued if no token
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* is found; if FALSE then a expert error will be issued if no token is found.
|
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*
|
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* This function expects to be given a tvb of only one line, and does no error
|
|
* checking of its given arguments.
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|
*/
|
|
static inline gint
|
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find_next_optional_token_in_line(tvbuff_t *tvb, proto_tree *tree,
|
|
gint *offset, gint *next_offset,
|
|
const gboolean optional)
|
|
{
|
|
gint tokenlen = 0;
|
|
gint next_off = -1;
|
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gint off = *offset;
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|
|
if (tvb_offset_exists(tvb, off)) {
|
|
while (tokenlen == 0) {
|
|
next_off = tvb_find_guint8(tvb, off, -1, ' ');
|
|
if (next_off == -1) {
|
|
tokenlen = tvb_captured_length_remaining(tvb, off);
|
|
break; /* Nothing more left */
|
|
}
|
|
|
|
tokenlen = next_off - off;
|
|
|
|
if (tokenlen == 0) {
|
|
/* two spaces in a row - illegal, but we'll keep dissecting */
|
|
proto_tree_add_expert(tree, NULL, &ei_sdp_invalid_line_space, tvb, off-1, 2);
|
|
off = next_off + 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!optional && tokenlen == 0) {
|
|
proto_tree_add_expert(tree, NULL, &ei_sdp_invalid_line_fields, tvb, 0, -1);
|
|
}
|
|
|
|
*next_offset = next_off;
|
|
*offset = off;
|
|
return tokenlen;
|
|
}
|
|
|
|
/* Same as above, but always issues an expert error if a token is not found. */
|
|
static inline gint
|
|
find_next_token_in_line(tvbuff_t *tvb, proto_tree *tree, gint *offset, gint *next_offset)
|
|
{
|
|
return find_next_optional_token_in_line(tvb, tree, offset, next_offset, FALSE);
|
|
}
|
|
|
|
/* Convert the protocol from the "m=" line to something we understand. */
|
|
static transport_proto_t
|
|
parse_sdp_media_protocol(const char *media_proto)
|
|
{
|
|
/* Sorted according to the "proto" registry at
|
|
* https://www.iana.org/assignments/sdp-parameters/sdp-parameters.xhtml#sdp-parameters-2 */
|
|
const struct {
|
|
const char *proto_name;
|
|
transport_proto_t proto;
|
|
} protocols[] = {
|
|
{ "RTP/AVP", SDP_PROTO_RTP }, /* RFC 4566 */
|
|
{ "udptl", SDP_PROTO_T38 }, /* ITU-T T.38, example in Annex E */
|
|
{ "UDPTL", SDP_PROTO_T38 }, /* Note: IANA registry contains lower case */
|
|
{ "RTP/AVPF", SDP_PROTO_RTP }, /* RFC 4585 */
|
|
{ "RTP/SAVP", SDP_PROTO_SRTP }, /* RFC 3711 */
|
|
{ "RTP/SAVPF", SDP_PROTO_SRTP }, /* RFC 5124 */
|
|
{ "UDP/TLS/RTP/SAVP", SDP_PROTO_SRTP }, /* RFC 5764 */
|
|
{ "UDP/TLS/RTP/SAVPF", SDP_PROTO_SRTP }, /* RFC 5764 */
|
|
{ "msrp/tcp", SDP_PROTO_MSRP }, /* Not in IANA, where is this from? */
|
|
{ "UDPSPRT", SDP_PROTO_SPRT }, /* Not in IANA, but draft-rajeshkumar-avt-v150-registration-00 */
|
|
{ "udpsprt", SDP_PROTO_SPRT }, /* lowercase per section E.1.1 of ITU-T V.150.1 */
|
|
};
|
|
|
|
for (guint i = 0; i < G_N_ELEMENTS(protocols); i++) {
|
|
if (!strcmp(protocols[i].proto_name, media_proto)) {
|
|
return protocols[i].proto;
|
|
}
|
|
}
|
|
|
|
return SDP_PROTO_UNKNOWN;
|
|
}
|
|
|
|
/* Parses the parts from "c=" into address structures. */
|
|
static void
|
|
parse_sdp_connection_address(const char *connection_type, const char *connection_address,
|
|
wmem_allocator_t *allocator, address *conn_addr)
|
|
{
|
|
if (strcmp(connection_type, "IP4") == 0) {
|
|
guint32 ip4_addr;
|
|
|
|
if (str_to_ip(connection_address, &ip4_addr)) {
|
|
/* connection_address could be converted to a valid ipv4 address*/
|
|
alloc_address_wmem(allocator, conn_addr, AT_IPv4, 4, &ip4_addr);
|
|
}
|
|
} else if (strcmp(connection_type, "IP6") == 0) {
|
|
struct e_in6_addr ip6_addr;
|
|
|
|
if (str_to_ip6(connection_address, &ip6_addr)) {
|
|
/* connection_address could be converted to a valid ipv6 address*/
|
|
alloc_address_wmem(allocator, conn_addr, AT_IPv6, 16, &ip6_addr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Starts a new media description. If there are too many media descriptions,
|
|
* no new media description is started and NULL is returned.
|
|
*/
|
|
static media_description_t *
|
|
sdp_new_media_description(wmem_array_t *media_descriptions, session_info_t *session_info)
|
|
{
|
|
media_description_t empty_desc;
|
|
media_description_t *media_desc;
|
|
|
|
/* Limit number to avoid consuming excess memory. */
|
|
if (wmem_array_get_count(media_descriptions) >= SDP_MAX_RTP_CHANNELS) {
|
|
DPRINT(("Too many media descriptions (more than %d), returning NULL!",
|
|
wmem_array_get_count(media_descriptions)));
|
|
return NULL;
|
|
}
|
|
|
|
memset(&empty_desc, 0, sizeof(media_description_t));
|
|
wmem_array_append_one(media_descriptions, empty_desc);
|
|
media_desc = (media_description_t *) wmem_array_index(media_descriptions,
|
|
wmem_array_get_count(media_descriptions) - 1);
|
|
|
|
/* XXX does it make sense making media_desc->media.pt a wmem array? */
|
|
|
|
/* If "c=" is given at the session level, copy it to the media description.
|
|
* It will be overridden as needed. */
|
|
if (session_info->conn_addr.type != AT_NONE) {
|
|
copy_address_wmem(wmem_file_scope(), &media_desc->conn_addr, &session_info->conn_addr);
|
|
}
|
|
|
|
/* If "a=rtpmap:" was set on the session level, copy them to media level. */
|
|
media_desc->media.rtp_dyn_payload =
|
|
rtp_dyn_payload_dup(session_info->rtp_dyn_payload);
|
|
|
|
return media_desc;
|
|
}
|
|
|
|
/* Remove information about media descriptions which are unused. These appeared
|
|
* in the "a=rtpmap:" (and maybe even in the payload types part of "m="?), but
|
|
* are not used (port is zero or it was not assigned to RTP dissector). */
|
|
static void
|
|
clean_unused_media_descriptions(wmem_array_t *descs)
|
|
{
|
|
for (guint i = 0; i < wmem_array_get_count(descs); i++) {
|
|
media_description_t *media_desc = (media_description_t *)wmem_array_index(descs, i);
|
|
|
|
/* If not assigned to subdissector, clear the unused information. */
|
|
if (!media_desc->media.set_rtp) {
|
|
rtp_dyn_payload_free(media_desc->media.rtp_dyn_payload);
|
|
media_desc->media.rtp_dyn_payload = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Subdissector functions */
|
|
static void
|
|
dissect_sdp_owner(tvbuff_t *tvb, proto_item *ti) {
|
|
proto_tree *sdp_owner_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
|
|
offset = 0;
|
|
|
|
sdp_owner_tree = proto_item_add_subtree(ti, ett_sdp_owner);
|
|
|
|
/* Find the username */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_owner_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_username, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the session id */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_owner_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_sessionid, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the version */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_owner_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_version, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the network type */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_owner_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_network_type, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the address type */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_owner_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_address_type, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the address */
|
|
proto_tree_add_item(sdp_owner_tree, hf_owner_address, tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
}
|
|
|
|
/*
|
|
* XXX - this can leak memory if an exception is thrown after we've fetched
|
|
* a string.
|
|
*/
|
|
static void
|
|
dissect_sdp_connection_info(tvbuff_t *tvb, proto_item* ti, session_info_t *session_info, media_description_t *media_desc)
|
|
{
|
|
proto_tree *sdp_connection_info_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
const guint8 *connection_type, *connection_address;
|
|
|
|
offset = 0;
|
|
|
|
sdp_connection_info_tree = proto_item_add_subtree(ti,
|
|
ett_sdp_connection_info);
|
|
|
|
/* Find the network type */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_connection_info_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_connection_info_tree,
|
|
hf_connection_info_network_type, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the address type */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_connection_info_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
/* Save connection address type */
|
|
proto_tree_add_item_ret_string(sdp_connection_info_tree,
|
|
hf_connection_info_address_type, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA, wmem_packet_scope(), &connection_type);
|
|
DPRINT(("parsed connection line type=%s", connection_type));
|
|
offset = next_offset + 1;
|
|
|
|
/* Find the connection address */
|
|
/* XXX - what if there's a <number of addresses> value? */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '/');
|
|
if (next_offset == -1) {
|
|
tokenlen = -1; /* end of tvbuff */
|
|
/* Save connection address */
|
|
connection_address =
|
|
(char*)tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_UTF_8|ENC_NA);
|
|
} else {
|
|
tokenlen = next_offset - offset;
|
|
/* Save connection address */
|
|
connection_address = (char*)tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
}
|
|
|
|
DPRINT(("parsed connection line address=%s", connection_address));
|
|
/* Parse and store connection address. Session-level addresses are
|
|
* packet-scoped since they will be cloned in file-scope when needed. */
|
|
if (session_info) {
|
|
parse_sdp_connection_address(connection_type, connection_address,
|
|
wmem_packet_scope(),
|
|
&session_info->conn_addr);
|
|
} else if (media_desc) {
|
|
/* Clear possibly inherited address from session level. */
|
|
free_address_wmem(wmem_file_scope(), &media_desc->conn_addr);
|
|
|
|
parse_sdp_connection_address(connection_type, connection_address,
|
|
wmem_file_scope(),
|
|
&media_desc->conn_addr);
|
|
}
|
|
|
|
proto_tree_add_item(sdp_connection_info_tree,
|
|
hf_connection_info_connection_address, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (next_offset != -1) {
|
|
offset = next_offset + 1;
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '/');
|
|
if (next_offset == -1) {
|
|
tokenlen = -1; /* end of tvbuff */
|
|
} else {
|
|
tokenlen = next_offset - offset;
|
|
}
|
|
proto_tree_add_item(sdp_connection_info_tree,
|
|
hf_connection_info_ttl, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (next_offset != -1) {
|
|
offset = next_offset + 1;
|
|
proto_tree_add_item(sdp_connection_info_tree,
|
|
hf_connection_info_num_addr, tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_sdp_bandwidth(tvbuff_t *tvb, proto_item *ti) {
|
|
proto_tree *sdp_bandwidth_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
proto_item *item;
|
|
gboolean unit_is_kbs = FALSE;
|
|
gboolean unit_is_bps = FALSE;
|
|
|
|
offset = 0;
|
|
|
|
sdp_bandwidth_tree = proto_item_add_subtree(ti, ett_sdp_bandwidth);
|
|
|
|
/* find the modifier */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
|
|
if (next_offset == -1)
|
|
return;
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
item = proto_tree_add_item(sdp_bandwidth_tree, hf_bandwidth_modifier, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (tvb_strneql(tvb, offset, "CT", 2) == 0) {
|
|
proto_item_append_text(item, " [Conference Total(total bandwidth of all RTP sessions)]");
|
|
unit_is_kbs = TRUE;
|
|
} else if (tvb_strneql(tvb, offset, "AS", 2) == 0) {
|
|
proto_item_append_text(item, " [Application Specific (RTP session bandwidth)]");
|
|
unit_is_kbs = TRUE;
|
|
} else if (tvb_strneql(tvb, offset, "TIAS", 4) == 0) {
|
|
proto_item_append_text(item, " [Transport Independent Application Specific maximum]");
|
|
unit_is_bps = TRUE;
|
|
}
|
|
|
|
|
|
offset = next_offset + 1;
|
|
|
|
item = proto_tree_add_item(sdp_bandwidth_tree, hf_bandwidth_value, tvb, offset, -1,
|
|
ENC_UTF_8|ENC_NA);
|
|
if (unit_is_kbs == TRUE)
|
|
proto_item_append_text(item, " kb/s");
|
|
if (unit_is_bps == TRUE)
|
|
proto_item_append_text(item, " b/s");
|
|
}
|
|
|
|
static void dissect_sdp_time(tvbuff_t *tvb, proto_item* ti) {
|
|
proto_tree *sdp_time_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
|
|
offset = 0;
|
|
|
|
sdp_time_tree = proto_item_add_subtree(ti, ett_sdp_time);
|
|
|
|
/* get start time */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_time_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_time_tree, hf_time_start, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA);
|
|
|
|
/* get stop time */
|
|
offset = next_offset + 1;
|
|
proto_tree_add_item(sdp_time_tree, hf_time_stop, tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
}
|
|
|
|
static void dissect_sdp_repeat_time(tvbuff_t *tvb, proto_item* ti) {
|
|
proto_tree *sdp_repeat_time_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
gboolean optional = FALSE;
|
|
|
|
offset = 0;
|
|
|
|
sdp_repeat_time_tree = proto_item_add_subtree(ti, ett_sdp_time);
|
|
|
|
/* get interval */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_repeat_time_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_repeat_time_tree, hf_repeat_time_interval, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
/* get duration */
|
|
offset = next_offset + 1;
|
|
tokenlen = find_next_token_in_line(tvb, sdp_repeat_time_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_repeat_time_tree, hf_repeat_time_duration, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
/* get offsets */
|
|
do {
|
|
offset = next_offset +1;
|
|
tokenlen = find_next_optional_token_in_line(tvb, sdp_repeat_time_tree,
|
|
&offset, &next_offset, optional);
|
|
if (tokenlen == 0)
|
|
break;
|
|
proto_tree_add_item(sdp_repeat_time_tree, hf_repeat_time_offset,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
optional = TRUE;
|
|
} while (next_offset != -1);
|
|
|
|
}
|
|
|
|
static void
|
|
dissect_sdp_timezone(tvbuff_t *tvb, proto_item* ti) {
|
|
proto_tree* sdp_timezone_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
gboolean optional = FALSE;
|
|
|
|
offset = 0;
|
|
|
|
sdp_timezone_tree = proto_item_add_subtree(ti, ett_sdp_timezone);
|
|
|
|
do {
|
|
tokenlen = find_next_optional_token_in_line(tvb, sdp_timezone_tree,
|
|
&offset, &next_offset, optional);
|
|
if (tokenlen == 0)
|
|
break;
|
|
|
|
proto_tree_add_item(sdp_timezone_tree, hf_timezone_time, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
tokenlen = find_next_optional_token_in_line(tvb, sdp_timezone_tree,
|
|
&offset, &next_offset, optional);
|
|
if (tokenlen == 0)
|
|
break;
|
|
proto_tree_add_item(sdp_timezone_tree, hf_timezone_offset, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
optional = TRUE;
|
|
} while (next_offset != -1);
|
|
|
|
}
|
|
|
|
|
|
static void dissect_sdp_encryption_key(tvbuff_t *tvb, proto_item * ti) {
|
|
proto_tree *sdp_encryption_key_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
|
|
offset = 0;
|
|
|
|
sdp_encryption_key_tree = proto_item_add_subtree(ti, ett_sdp_encryption_key);
|
|
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
|
|
if (next_offset == -1)
|
|
return;
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
proto_tree_add_item(sdp_encryption_key_tree, hf_encryption_key_type,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
offset = next_offset + 1;
|
|
proto_tree_add_item(sdp_encryption_key_tree, hf_encryption_key_data,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
}
|
|
|
|
static void dissect_key_mgmt(tvbuff_t *tvb, packet_info * pinfo, proto_item * ti) {
|
|
gchar *data_p = NULL;
|
|
const guint8 *prtcl_id = NULL;
|
|
gint len;
|
|
tvbuff_t *keymgmt_tvb;
|
|
int found_match = 0;
|
|
proto_tree *key_tree;
|
|
gint next_offset;
|
|
gint offset = 0;
|
|
gint tokenlen;
|
|
|
|
key_tree = proto_item_add_subtree(ti, ett_sdp_key_mgmt);
|
|
|
|
tokenlen = find_next_token_in_line(tvb, key_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item_ret_string(key_tree, hf_key_mgmt_prtcl_id, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &prtcl_id);
|
|
|
|
offset = next_offset + 1;
|
|
|
|
len = tvb_captured_length_remaining(tvb, offset);
|
|
if (len < 0)
|
|
return;
|
|
|
|
data_p = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, len, ENC_UTF_8|ENC_NA);
|
|
keymgmt_tvb = base64_to_tvb(tvb, data_p);
|
|
add_new_data_source(pinfo, keymgmt_tvb, "Key Management Data");
|
|
|
|
if ((prtcl_id != NULL) && (key_mgmt_dissector_table != NULL)) {
|
|
found_match = dissector_try_string(key_mgmt_dissector_table,
|
|
prtcl_id,
|
|
keymgmt_tvb, pinfo,
|
|
key_tree, NULL);
|
|
}
|
|
|
|
if (found_match) {
|
|
proto_item *ti2 = proto_tree_add_item(key_tree, hf_key_mgmt_data,
|
|
keymgmt_tvb, 0, -1, ENC_NA);
|
|
PROTO_ITEM_SET_HIDDEN(ti2);
|
|
} else {
|
|
proto_tree_add_item(key_tree, hf_key_mgmt_data,
|
|
keymgmt_tvb, 0, -1, ENC_NA);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static void dissect_sdp_session_attribute(tvbuff_t *tvb, packet_info * pinfo, proto_item * ti) {
|
|
proto_tree *sdp_session_attribute_tree;
|
|
gint offset, next_offset, tokenlen;
|
|
const guint8 *field_name;
|
|
|
|
offset = 0;
|
|
|
|
sdp_session_attribute_tree = proto_item_add_subtree(ti,
|
|
ett_sdp_session_attribute);
|
|
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
|
|
if (next_offset == -1)
|
|
return;
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
proto_tree_add_item_ret_string(sdp_session_attribute_tree, hf_session_attribute_field,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &field_name);
|
|
|
|
offset = next_offset + 1;
|
|
|
|
if (strcmp((const char *)field_name, "ipbcp") == 0) {
|
|
offset = tvb_ws_mempbrk_pattern_guint8(tvb, offset, -1,&pbrk_digits, NULL);
|
|
|
|
if (offset == -1)
|
|
return;
|
|
|
|
tokenlen = find_next_token_in_line(tvb, sdp_session_attribute_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_session_attribute_tree, hf_ipbcp_version, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
offset = tvb_ws_mempbrk_pattern_guint8(tvb, offset, -1,&pbrk_alpha, NULL);
|
|
|
|
if (offset == -1)
|
|
return;
|
|
|
|
tokenlen = tvb_find_line_end(tvb, offset, -1, &next_offset, FALSE);
|
|
|
|
if (tokenlen == -1)
|
|
return;
|
|
|
|
proto_tree_add_item(sdp_session_attribute_tree, hf_ipbcp_type, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
} else if (strcmp((const char *)field_name, "key-mgmt") == 0) {
|
|
tvbuff_t *key_tvb;
|
|
proto_item *key_ti;
|
|
|
|
key_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
key_ti = proto_tree_add_item(sdp_session_attribute_tree, hf_key_mgmt_att_value, key_tvb, 0, -1, ENC_UTF_8|ENC_NA);
|
|
|
|
dissect_key_mgmt(key_tvb, pinfo, key_ti);
|
|
} else {
|
|
proto_tree_add_item(sdp_session_attribute_tree, hf_session_attribute_value,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
}
|
|
}
|
|
|
|
|
|
/* Dissect media description - this is passed the line starting after 'm=', so like one of these:
|
|
* audio 29156 RTP/AVP 18 0
|
|
* video 49170/2 RTP/AVP 31 99
|
|
*/
|
|
static void
|
|
dissect_sdp_media(tvbuff_t *tvb, packet_info* pinfo, proto_item *ti,
|
|
media_description_t *media_desc) {
|
|
proto_tree *sdp_media_tree;
|
|
gint offset, next_offset, tokenlen, idx;
|
|
guint8 *media_format;
|
|
gboolean optional = FALSE;
|
|
proto_item *it;
|
|
const guint8 *media_type_str;
|
|
const guint8 *media_port_str;
|
|
const guint8 *media_proto_str;
|
|
transport_proto_t transport_proto;
|
|
guint16 media_port;
|
|
gboolean media_port_valid;
|
|
proto_item *pi;
|
|
|
|
offset = 0;
|
|
|
|
/* Create tree for media session */
|
|
sdp_media_tree = proto_item_add_subtree(ti, ett_sdp_media);
|
|
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
/* Type of media session */
|
|
proto_tree_add_item_ret_string(sdp_media_tree, hf_media_media, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA, wmem_packet_scope(), &media_type_str);
|
|
if (media_desc) {
|
|
/* for RTP statistics (supposedly?) */
|
|
media_desc->is_video = strcmp(media_type_str, "video") == 0;
|
|
}
|
|
DPRINT(("parsed media_type=%s", media_type_str));
|
|
|
|
offset = next_offset + 1;
|
|
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
next_offset = tvb_find_guint8(tvb, offset, tokenlen, '/');
|
|
|
|
if (next_offset != -1) {
|
|
tokenlen = next_offset - offset;
|
|
/* Save port info */
|
|
it = proto_tree_add_item_ret_string(sdp_media_tree, hf_media_port_string, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA, wmem_packet_scope(), &media_port_str);
|
|
DPRINT(("parsed media_port=%s", media_port_str));
|
|
if (g_ascii_isdigit(media_port_str[0])) {
|
|
PROTO_ITEM_SET_HIDDEN(it);
|
|
media_port_valid = ws_strtou16(media_port_str, NULL, &media_port);
|
|
pi = proto_tree_add_uint(sdp_media_tree, hf_media_port, tvb, offset, tokenlen,
|
|
media_port);
|
|
if (!media_port_valid)
|
|
expert_add_info(pinfo, pi, &ei_sdp_invalid_media_port);
|
|
if (media_desc) {
|
|
media_desc->media_port = media_port;
|
|
}
|
|
}
|
|
|
|
offset = next_offset + 1;
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
/* TODO: this puts the (optional) number of ports in the tree, but we don't
|
|
actually use it for building the extra RTP flows, which we should. */
|
|
proto_tree_add_item(sdp_media_tree, hf_media_portcount, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
} else {
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
/* Save port info */
|
|
it = proto_tree_add_item_ret_string(sdp_media_tree, hf_media_port_string, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA, wmem_packet_scope(), &media_port_str);
|
|
DPRINT(("parsed media_port=%s", media_port_str));
|
|
if (g_ascii_isdigit(media_port_str[0])) {
|
|
PROTO_ITEM_SET_HIDDEN(it);
|
|
media_port_valid = ws_strtou16(media_port_str, NULL, &media_port);
|
|
pi = proto_tree_add_uint(sdp_media_tree, hf_media_port, tvb, offset, tokenlen,
|
|
media_port);
|
|
if (!media_port_valid)
|
|
expert_add_info(pinfo, pi, &ei_sdp_invalid_media_port);
|
|
if (media_desc) {
|
|
media_desc->media_port = media_port;
|
|
}
|
|
}
|
|
offset = next_offset + 1;
|
|
}
|
|
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
|
|
/* Save port protocol */
|
|
proto_tree_add_item_ret_string(sdp_media_tree, hf_media_proto, tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA, wmem_packet_scope(), &media_proto_str);
|
|
DPRINT(("parsed media_proto=%s", media_proto_str));
|
|
/* Detect protocol for registering with other dissectors like RTP. */
|
|
transport_proto = parse_sdp_media_protocol(media_proto_str);
|
|
if (media_desc) {
|
|
media_desc->proto = transport_proto;
|
|
}
|
|
|
|
do {
|
|
offset = next_offset + 1;
|
|
tokenlen = find_next_optional_token_in_line(tvb, sdp_media_tree,
|
|
&offset, &next_offset, optional);
|
|
if (tokenlen == 0)
|
|
break;
|
|
|
|
/* RFC 4566: If the <proto> sub-field is "RTP/AVP" or "RTP/SAVP" the
|
|
* <fmt> sub-fields contain RTP payload type numbers. */
|
|
if (transport_proto == SDP_PROTO_RTP || transport_proto == SDP_PROTO_SRTP) {
|
|
media_format = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (g_ascii_isdigit(media_format[0])) {
|
|
proto_tree_add_string(sdp_media_tree, hf_media_format, tvb, offset,
|
|
tokenlen, val_to_str_ext((guint32)strtoul((char*)media_format, NULL, 10), &rtp_payload_type_vals_ext, "%u"));
|
|
|
|
if (media_desc) {
|
|
idx = media_desc->media.pt_count;
|
|
media_desc->media.pt[idx] = (gint32)strtol((char*)media_format, NULL, 10);
|
|
DPRINT(("parsed media codec pt=%d", media_desc->media.pt[idx]));
|
|
if (idx < (SDP_MAX_RTP_PAYLOAD_TYPES-1))
|
|
media_desc->media.pt_count++;
|
|
}
|
|
} else {
|
|
proto_tree_add_item(sdp_media_tree, hf_media_format, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
}
|
|
} else {
|
|
proto_tree_add_item(sdp_media_tree, hf_media_format, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
}
|
|
optional = TRUE;
|
|
} while (next_offset != -1);
|
|
|
|
/* XXX Dissect traffic to "Port" as "Protocol"
|
|
* Remember this Port/Protocol pair so we can tear it down again later
|
|
* Actually, it's harder than that:
|
|
* We need to find out the address of the other side first and it
|
|
* looks like that info can be found in SIP headers only.
|
|
*/
|
|
|
|
}
|
|
|
|
static tvbuff_t *
|
|
ascii_bytes_to_tvb(tvbuff_t *tvb, packet_info *pinfo, gint len, gchar *msg)
|
|
{
|
|
guint8 *buf = (guint8 *)wmem_alloc(pinfo->pool, 10240);
|
|
|
|
/* arbitrary maximum length */
|
|
if (len < 20480) {
|
|
int i;
|
|
tvbuff_t *bytes_tvb;
|
|
|
|
/* first, skip to where the encoded pdu starts, this is
|
|
the first hex digit after the '=' char.
|
|
*/
|
|
while (1) {
|
|
if ((*msg == 0) || (*msg == '\n')) {
|
|
return NULL;
|
|
}
|
|
if (*msg == '=') {
|
|
msg++;
|
|
break;
|
|
}
|
|
msg++;
|
|
}
|
|
while (1) {
|
|
if ((*msg == 0) || (*msg == '\n')) {
|
|
return NULL;
|
|
}
|
|
if ( ((*msg >= '0') && (*msg <= '9'))
|
|
|| ((*msg >= 'a') && (*msg <= 'f'))
|
|
|| ((*msg >= 'A') && (*msg <= 'F'))) {
|
|
break;
|
|
}
|
|
msg++;
|
|
}
|
|
i = 0;
|
|
while (((*msg >= '0') && (*msg <= '9'))
|
|
|| ((*msg >= 'a') && (*msg <= 'f'))
|
|
|| ((*msg >= 'A') && (*msg <= 'F'))) {
|
|
int val;
|
|
if ((*msg >= '0') && (*msg <= '9')) {
|
|
val = (*msg)-'0';
|
|
} else if ((*msg >= 'a') && (*msg <= 'f')) {
|
|
val = (*msg)-'a'+10;
|
|
} else if ((*msg >= 'A') && (*msg <= 'F')) {
|
|
val = (*msg)-'A'+10;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
val <<= 4;
|
|
msg++;
|
|
if ((*msg >= '0') && (*msg <= '9')) {
|
|
val |= (*msg)-'0';
|
|
} else if ((*msg >= 'a') && (*msg <= 'f')) {
|
|
val |= (*msg)-'a'+10;
|
|
} else if ((*msg >= 'A') && (*msg <= 'F')) {
|
|
val |= (*msg)-'A'+10;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
msg++;
|
|
|
|
buf[i] = (guint8)val;
|
|
i++;
|
|
}
|
|
if (i == 0) {
|
|
return NULL;
|
|
}
|
|
bytes_tvb = tvb_new_child_real_data(tvb, buf, i, i);
|
|
add_new_data_source(pinfo, bytes_tvb, "ASCII bytes to tvb");
|
|
return bytes_tvb;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Annex X Profiles and levels definition */
|
|
static const value_string h263_profile_vals[] =
|
|
{
|
|
{ 0, "Baseline Profile" },
|
|
{ 1, "H.320 Coding Efficiency Version 2 Backward-Compatibility Profile" },
|
|
{ 2, "Version 1 Backward-Compatibility Profile" },
|
|
{ 3, "Version 2 Interactive and Streaming Wireless Profile" },
|
|
{ 4, "Version 3 Interactive and Streaming Wireless Profile" },
|
|
{ 5, "Conversational High Compression Profile" },
|
|
{ 6, "Conversational Internet Profile" },
|
|
{ 7, "Conversational Interlace Profile" },
|
|
{ 8, "High Latency Profile" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
|
|
/* RFC 4629 The level are described in table X.2 of H.263 annex X */
|
|
static const value_string h263_level_vals[] =
|
|
{
|
|
{ 10, "QCIF (176 x 144), 1 x 64Kb/s" },
|
|
{ 20, "CIF (352 x 288), 2 x 64Kb/s" },
|
|
{ 30, "CIF (352 x 288), 6 x 64Kb/s" },
|
|
{ 40, "CIF (352 x 288), 32 x 64Kb/s" },
|
|
{ 45, "QCIF (176 x144) support of CPFMT, 2 x 64Kb/s" },
|
|
{ 50, "CIF (352 x 288) support of CPFMT, 64 x 64Kb/s" },
|
|
{ 60, "CPFMT: 720 x 288 support of CPFMT, 128 x 64Kb/s" },
|
|
{ 70, "CPFMT: 720 x 576 support of CPFMT, 256 x 64Kb/s" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
|
|
static const value_string h264_packetization_mode_vals[] =
|
|
{
|
|
{ 0, "Single NAL mode" },
|
|
{ 1, "Non-interleaved mode" },
|
|
{ 2, "Interleaved mode" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
/*
|
|
* TODO: Make this a more generic routine to dissect fmtp parameters depending on media types
|
|
*/
|
|
static void
|
|
decode_sdp_fmtp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint offset, gint tokenlen, char *mime_type) {
|
|
gint next_offset;
|
|
gint end_offset;
|
|
guint8 *field_name;
|
|
gchar *format_specific_parameter;
|
|
proto_item *item;
|
|
tvbuff_t * volatile data_tvb;
|
|
|
|
end_offset = offset + tokenlen;
|
|
|
|
#if 0
|
|
proto_tree_add_debug(tree, tvb, offset, tokenlen, "Debug; Analysed string: '%s'",
|
|
tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_ASCII));
|
|
#endif
|
|
|
|
/* Look for an '=' within this value - this may indicate that there is a
|
|
profile-level-id parameter to find if the MPEG4 media type is in use */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '=');
|
|
if (next_offset == -1)
|
|
{
|
|
/* Give up (and avoid exception) if '=' not found */
|
|
return;
|
|
}
|
|
|
|
/* Find the name of the parameter */
|
|
tokenlen = next_offset - offset;
|
|
field_name = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
#if 0
|
|
proto_tree_add_debug(tree, tvb, offset, tokenlen, "Debug; MIMEtype '%s'Parameter name: '%s'", mime_type, field_name); */
|
|
#endif
|
|
offset = next_offset;
|
|
|
|
/* Dissect the MPEG4 profile-level-id parameter if present */
|
|
if ((mime_type != NULL) && (g_ascii_strcasecmp(mime_type, "MP4V-ES") == 0)) {
|
|
if (strcmp((char*)field_name, "profile-level-id") == 0) {
|
|
offset++;
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
item = proto_tree_add_uint(tree, hf_sdp_fmtp_mpeg4_profile_level_id, tvb, offset, tokenlen,
|
|
(guint32)strtol((char*)format_specific_parameter, NULL, 10));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
} else if (strcmp((char*)field_name, "config") == 0) {
|
|
/* String including "=" */
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
/* ascii_bytes_to_tvb requires the "=" to be in the buffer */
|
|
data_tvb = ascii_bytes_to_tvb(tvb, pinfo, tokenlen, format_specific_parameter);
|
|
if (mp4ves_config_handle && data_tvb) {
|
|
call_dissector(mp4ves_config_handle, data_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Dissect the H263-2000 profile parameter if present */
|
|
if (((mime_type != NULL) && (g_ascii_strcasecmp(mime_type, "H263-2000") == 0)) ||
|
|
((mime_type != NULL) && (g_ascii_strcasecmp(mime_type, "H263-1998") == 0))) {
|
|
if (strcmp((char*)field_name, "profile") == 0) {
|
|
offset++;
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
item = proto_tree_add_uint(tree, hf_sdp_fmtp_h263_profile, tvb, offset, tokenlen,
|
|
(guint32)strtol((char*)format_specific_parameter, NULL, 10));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
} else if (strcmp((char*)field_name, "level") == 0) {
|
|
offset++;
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
item = proto_tree_add_uint(tree, hf_sdp_fmtp_h263_level, tvb, offset, tokenlen,
|
|
(guint32)strtol((char*)format_specific_parameter, NULL, 10));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
}
|
|
|
|
|
|
/* Dissect the H264 profile-level-id parameter
|
|
* RFC 3984:
|
|
* A base16 [6] (hexadecimal) representation of
|
|
* the following three bytes in the sequence
|
|
* parameter set NAL unit specified in [1]: 1)
|
|
* profile_idc, 2) a byte herein referred to as
|
|
* profile-iop, composed of the values of
|
|
* constraint_set0_flag, constraint_set1_flag,
|
|
* constraint_set2_flag, and reserved_zero_5bits
|
|
* in bit-significance order, starting from the
|
|
* most significant bit, and 3) level_idc.
|
|
*/
|
|
if ((mime_type != NULL) && ((g_ascii_strcasecmp(mime_type, "H264") == 0) || (g_ascii_strcasecmp(mime_type, "H264-SVC") == 0))) {
|
|
if (strcmp(field_name, "profile-level-id") == 0) {
|
|
int length = 0;
|
|
|
|
/* Length includes "=" as it's required by ascii_bytes_to_tvb()*/
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
data_tvb = ascii_bytes_to_tvb(tvb, pinfo, tokenlen, format_specific_parameter);
|
|
if (!data_tvb) {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_sdp_invalid_conversion, tvb, offset, tokenlen, "Could not convert '%s' to 3 bytes", format_specific_parameter);
|
|
return;
|
|
}
|
|
length = tvb_reported_length(data_tvb);
|
|
if (length == 3) {
|
|
if (h264_handle && data_tvb) {
|
|
dissect_h264_profile(data_tvb, pinfo, tree);
|
|
}
|
|
} else {
|
|
item = proto_tree_add_expert_format(tree, pinfo, &ei_sdp_invalid_conversion, tvb, offset, tokenlen, "Incorrectly coded, must be three bytes");
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
} else if (strcmp(field_name, "packetization-mode") == 0) {
|
|
offset++;
|
|
tokenlen = end_offset - offset;
|
|
format_specific_parameter = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
item = proto_tree_add_uint(tree, hf_sdp_h264_packetization_mode, tvb, offset, tokenlen,
|
|
(guint32)strtol((char*)format_specific_parameter, NULL, 10));
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
} else if (strcmp(field_name, "sprop-parameter-sets") == 0) {
|
|
/* The value of the parameter is the
|
|
base64 [6] representation of the initial
|
|
parameter set NAL units as specified in
|
|
sections 7.3.2.1 and 7.3.2.2 of [1]. The
|
|
parameter sets are conveyed in decoding order,
|
|
and no framing of the parameter set NAL units
|
|
takes place. A comma is used to separate any
|
|
pair of parameter sets in the list.
|
|
*/
|
|
const guint8 *data_p = NULL;
|
|
gint comma_offset;
|
|
|
|
|
|
/* Move past '=' */
|
|
offset++;
|
|
comma_offset = tvb_find_guint8(tvb, offset, -1, ',');
|
|
if (comma_offset != -1) {
|
|
tokenlen = comma_offset - offset;
|
|
} else {
|
|
tokenlen = end_offset - offset;
|
|
}
|
|
|
|
proto_tree_add_item_ret_string(tree, hf_sdp_nal_unit_1_string, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &data_p);
|
|
|
|
data_tvb = base64_to_tvb(tvb, data_p);
|
|
add_new_data_source(pinfo, data_tvb, "h264 prop-parameter-sets");
|
|
|
|
if (h264_handle && data_tvb) {
|
|
TRY {
|
|
dissect_h264_nal_unit(data_tvb, pinfo, tree);
|
|
}
|
|
CATCH_NONFATAL_ERRORS {
|
|
show_exception(tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
|
|
}
|
|
ENDTRY;
|
|
if (comma_offset != -1) {
|
|
/* Second NAL unit */
|
|
offset = comma_offset +1;
|
|
tokenlen = end_offset - offset;
|
|
proto_tree_add_item_ret_string(tree, hf_sdp_nal_unit_2_string, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &data_p);
|
|
data_tvb = base64_to_tvb(tvb, data_p);
|
|
add_new_data_source(pinfo, data_tvb, "h264 prop-parameter-sets 2");
|
|
dissect_h264_nal_unit(data_tvb, pinfo, tree);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
static const string_string ice_candidate_types[] = {
|
|
{ "host", "Host candidate" },
|
|
{ "srflx", "Server reflexive candidate" },
|
|
{ "prflx", "Peer reflexive candidate" },
|
|
{ "relay", "Relayed candidate" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_sdp_media_attribute_candidate(proto_tree *tree, tvbuff_t *tvb, int offset)
|
|
{
|
|
/* RFC 5245 (ICE): "The candidate attribute is a media-level attribute
|
|
* only. It contains a transport address for a candidate that can be
|
|
* used for connectivity checks."
|
|
* https://tools.ietf.org/html/rfc5245#section-15.1
|
|
*
|
|
* candidate-attribute = "candidate" ":" foundation SP component-id SP
|
|
* transport SP
|
|
* priority SP
|
|
* connection-address SP ;from RFC 4566
|
|
* port ;port from RFC 4566
|
|
* SP cand-type
|
|
* [SP rel-addr]
|
|
* [SP rel-port]
|
|
* *(SP extension-att-name SP
|
|
* extension-att-value)
|
|
*
|
|
* Example: "candidate:0 1 UDP 2122252543 10.9.0.2 60299 typ host"
|
|
*/
|
|
proto_item *pi;
|
|
gint next_offset, tokenlen;
|
|
const guint8 *candidate_type;
|
|
|
|
/* foundation: between 1 and 32 "ICE chars" (ALPHA / DIGIT / "+" / "/") */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_foundation,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* component-id: integer between 1 and 256.
|
|
* For RTP, 1 MUST be RTP and 2 MUST be RTCP (RFC 5245) */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_componentid,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* transport: "UDP", etc. */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_transport,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* priority: integer between 1 and 2^31-1 */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_priority,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* connection-address: IPv4, IPv6 address or FQDN. */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_address,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* port */
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_ice_candidate_port,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* cand-type: type of candidate (where it learned the candidate)
|
|
* Check for "typ " in "typ host" and skip it. */
|
|
if (tvb_strneql(tvb, offset, "typ ", 4))
|
|
return;
|
|
offset += 4;
|
|
tokenlen = find_next_token_in_line(tvb, tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
pi = proto_tree_add_item_ret_string(tree, hf_ice_candidate_type,
|
|
tvb, offset, tokenlen, ENC_ASCII|ENC_NA,
|
|
wmem_packet_scope(), &candidate_type);
|
|
if ((candidate_type = try_str_to_str(candidate_type, ice_candidate_types))) {
|
|
proto_item_append_text(pi, " (%s)", candidate_type);
|
|
}
|
|
/* offset = next_offset + 1; */
|
|
|
|
/* Ignored: [rel-addr] [rel-port] *(extension-att-name extension-att-value) */
|
|
}
|
|
|
|
typedef struct {
|
|
const char *name;
|
|
} sdp_names_t;
|
|
|
|
#define SDP_RTPMAP 1
|
|
#define SDP_FMTP 2
|
|
#define SDP_PATH 3
|
|
#define SDP_H248_ITEM 4
|
|
#define SDP_CRYPTO 5
|
|
#define SDP_SPRTMAP 6
|
|
#define SDP_CANDIDATE 7
|
|
#define SDP_ED137_TYPE 8
|
|
#define SDP_ED137_TXRXMODE 9
|
|
#define SDP_ED137_FID 10
|
|
|
|
static const sdp_names_t sdp_media_attribute_names[] = {
|
|
{ "Unknown-name"}, /* 0 Pad so that the real headers start at index 1 */
|
|
{ "rtpmap"}, /* 1 */
|
|
{ "fmtp"}, /* 2 */
|
|
{ "path"}, /* 3 */
|
|
{ "h248item"}, /* 4 */
|
|
{ "crypto"}, /* 5 */
|
|
{ "sprt"}, /* 6 */
|
|
{ "candidate" }, /* 7 */
|
|
{ "type" }, /* 8 */
|
|
{ "txrxmode" }, /* 9 */
|
|
{ "fid" }, /* 10 */
|
|
};
|
|
|
|
static gint find_sdp_media_attribute_names(tvbuff_t *tvb, int offset, guint len)
|
|
{
|
|
guint i;
|
|
|
|
for (i = 1; i < array_length(sdp_media_attribute_names); i++) {
|
|
if ((len == strlen(sdp_media_attribute_names[i].name)) &&
|
|
(tvb_strncaseeql(tvb, offset, sdp_media_attribute_names[i].name, len) == 0))
|
|
return i;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void dissect_sdp_media_attribute(tvbuff_t *tvb, packet_info *pinfo, proto_item * ti, int length,
|
|
transport_info_t *transport_info,
|
|
session_info_t *session_info,
|
|
media_description_t *media_desc,
|
|
sdp_data_t *sdp_data)
|
|
{
|
|
proto_tree *sdp_media_attribute_tree, *parameter_item;
|
|
proto_item *fmtp_item, *media_format_item, *parameter_tree;
|
|
proto_tree *fmtp_tree;
|
|
proto_item *pi;
|
|
gint offset, next_offset, tokenlen, colon_offset;
|
|
/*??guint8 *field_name;*/
|
|
const guint8 *payload_type;
|
|
guint8 *attribute_value;
|
|
guint8 pt;
|
|
gint sdp_media_attrbute_code;
|
|
const char *msrp_res = "msrp://";
|
|
const char *h324ext_h223lcparm = "h324ext/h223lcparm";
|
|
gboolean has_more_pars = TRUE;
|
|
tvbuff_t *h245_tvb;
|
|
guint8 master_key_length = 0, master_salt_length = 0;
|
|
guint32 crypto_tag;
|
|
gboolean crypto_tag_valid;
|
|
gboolean mki_len_valid;
|
|
|
|
offset = 0;
|
|
|
|
/* Create attribute tree */
|
|
sdp_media_attribute_tree = proto_item_add_subtree(ti,
|
|
ett_sdp_media_attribute);
|
|
/* Find end of field */
|
|
colon_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
|
|
if (colon_offset == -1)
|
|
return;
|
|
|
|
/* Attribute field name is token before ':' */
|
|
tokenlen = colon_offset - offset;
|
|
proto_tree_add_item(sdp_media_attribute_tree,
|
|
hf_media_attribute_field,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
/*??field_name = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_ASCII);*/
|
|
sdp_media_attrbute_code = find_sdp_media_attribute_names(tvb, offset, tokenlen);
|
|
|
|
/* Skip colon */
|
|
offset = colon_offset + 1;
|
|
/* skip leading wsp */
|
|
offset = tvb_skip_wsp(tvb, offset, tvb_captured_length_remaining(tvb, offset));
|
|
|
|
/* Value is the remainder of the line */
|
|
attribute_value = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tvb_captured_length_remaining(tvb, offset), ENC_UTF_8|ENC_NA);
|
|
|
|
|
|
|
|
/*********************************************/
|
|
/* Special parsing for some field name types */
|
|
|
|
switch (sdp_media_attrbute_code) {
|
|
case SDP_RTPMAP:
|
|
/* decode the rtpmap to see if it is DynamicPayload to dissect them automatic */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ' ');
|
|
|
|
if (next_offset == -1)
|
|
return;
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
proto_tree_add_item_ret_string(sdp_media_attribute_tree, hf_media_format, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA, wmem_packet_scope(), &payload_type);
|
|
|
|
offset = next_offset + 1;
|
|
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '/');
|
|
|
|
if (next_offset == -1) {
|
|
return;
|
|
}
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
proto_tree_add_item(sdp_media_attribute_tree, hf_media_encoding_name, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
if (!ws_strtou8(payload_type, NULL, &pt) || pt >= SDP_NO_OF_PT) {
|
|
return; /* Invalid */
|
|
}
|
|
|
|
/* String is file scope allocated because transport_info is connection related */
|
|
transport_info->encoding_name[pt] = (char*)tvb_get_string_enc(wmem_file_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
next_offset = next_offset + 1;
|
|
offset = next_offset;
|
|
while (length-1 >= next_offset) {
|
|
if (!g_ascii_isdigit(tvb_get_guint8(tvb, next_offset)))
|
|
break;
|
|
next_offset++;
|
|
}
|
|
tokenlen = next_offset - offset;
|
|
pi = proto_tree_add_item(sdp_media_attribute_tree, hf_media_sample_rate, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
transport_info->sample_rate[pt] = 0;
|
|
if (!ws_strtou32(tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA),
|
|
NULL, &transport_info->sample_rate[pt]))
|
|
expert_add_info(pinfo, pi, &ei_sdp_invalid_sample_rate);
|
|
/* As per RFC2327 it is possible to have multiple Media Descriptions ("m=").
|
|
For example:
|
|
|
|
a=rtpmap:101 G726-32/8000
|
|
m=audio 49170 RTP/AVP 0 97
|
|
a=rtpmap:97 telephone-event/8000
|
|
m=audio 49172 RTP/AVP 97 101
|
|
a=rtpmap:97 G726-24/8000
|
|
|
|
The Media attributes ("a="s) after the "m=" only apply for that "m=".
|
|
If there is an "a=" before the first "m=", that attribute applies for
|
|
all the session (all the "m="s).
|
|
*/
|
|
|
|
if (session_info) {
|
|
/* If this "a=" appear before any "m=", we add it to the session
|
|
* info, these will be added later to all media (via
|
|
* sdp_new_media_description).
|
|
*/
|
|
rtp_dyn_payload_insert(session_info->rtp_dyn_payload,
|
|
pt,
|
|
transport_info->encoding_name[pt],
|
|
transport_info->sample_rate[pt]);
|
|
} else if (media_desc) {
|
|
/* if the "a=" is after an "m=", only apply to this "m=" */
|
|
rtp_dyn_payload_insert(media_desc->media.rtp_dyn_payload,
|
|
pt,
|
|
transport_info->encoding_name[pt],
|
|
transport_info->sample_rate[pt]);
|
|
}
|
|
break;
|
|
case SDP_FMTP:
|
|
if (sdp_media_attribute_tree) {
|
|
guint8 media_format;
|
|
/* Reading the Format parameter(fmtp) */
|
|
/* Skip leading space, if any */
|
|
offset = tvb_skip_wsp(tvb, offset, tvb_captured_length_remaining(tvb, offset));
|
|
/* Media format extends to the next space */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ' ');
|
|
|
|
if (next_offset == -1)
|
|
return;
|
|
|
|
tokenlen = next_offset - offset;
|
|
|
|
|
|
media_format_item = proto_tree_add_item(sdp_media_attribute_tree,
|
|
hf_media_format, tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (!ws_strtou8(tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA),
|
|
NULL, &media_format) || media_format >= SDP_NO_OF_PT) {
|
|
expert_add_info(pinfo, media_format_item, &ei_sdp_invalid_media_format);
|
|
return;
|
|
}
|
|
|
|
/* Append encoding name to format if known */
|
|
proto_item_append_text(media_format_item, " [%s]",
|
|
transport_info->encoding_name[media_format]);
|
|
|
|
#if 0 /* XXX: ?? */
|
|
payload_type = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_ASCII);
|
|
#endif
|
|
/* Move offset past the payload type */
|
|
offset = next_offset + 1;
|
|
|
|
while (has_more_pars == TRUE) {
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ';');
|
|
offset = tvb_skip_wsp(tvb, offset, tvb_captured_length_remaining(tvb, offset));
|
|
|
|
if (next_offset == -1) {
|
|
has_more_pars = FALSE;
|
|
next_offset= tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* There are at least 2 - add the first parameter */
|
|
tokenlen = next_offset - offset;
|
|
fmtp_item = proto_tree_add_item(sdp_media_attribute_tree,
|
|
hf_media_format_specific_parameter, tvb,
|
|
offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
|
|
fmtp_tree = proto_item_add_subtree(fmtp_item, ett_sdp_fmtp);
|
|
|
|
decode_sdp_fmtp(fmtp_tree, tvb, pinfo, offset, tokenlen,
|
|
transport_info->encoding_name[media_format]);
|
|
|
|
/* Move offset past "; " and onto firts char */
|
|
offset = next_offset + 1;
|
|
}
|
|
}
|
|
break;
|
|
case SDP_PATH:
|
|
/* msrp attributes that contain address needed for conversation */
|
|
/* RFC 4975
|
|
* path = path-label ":" path-list
|
|
* path-label = "path"
|
|
* path-list= MSRP-URI *(SP MSRP-URI)
|
|
* MSRP-URI = msrp-scheme "://" authority
|
|
* ["/" session-id] ";" transport *( ";" URI-parameter)
|
|
* ; authority as defined in RFC3986
|
|
*
|
|
* msrp-scheme = "msrp" / "msrps"
|
|
* RFC 3986
|
|
* The authority component is preceded by a double slash ("//") and is terminated by
|
|
* the next slash ("/"), question mark ("?"), or number sign ("#") character, or by
|
|
* the end of the URI.
|
|
*/
|
|
|
|
/* Check for "msrp://" */
|
|
if (strncmp((char*)attribute_value, msrp_res, strlen(msrp_res)) == 0 && msrp_handle &&
|
|
media_desc && media_desc->proto == SDP_PROTO_MSRP) {
|
|
int address_offset, port_offset, port_end_offset;
|
|
|
|
/* Address starts here */
|
|
address_offset = offset + (int)strlen(msrp_res);
|
|
|
|
/* Port is after next ':' */
|
|
port_offset = tvb_find_guint8(tvb, address_offset, -1, ':');
|
|
/* Check if port is present if not skipp */
|
|
if (port_offset!= -1) {
|
|
/* Port ends with '/' */
|
|
port_end_offset = tvb_find_guint8(tvb, port_offset, -1, '/');
|
|
if (port_end_offset == -1) {
|
|
/* No "/" look for the ";" */
|
|
port_end_offset = tvb_find_guint8(tvb, port_offset, -1, ';');
|
|
}
|
|
/* Attempt to convert address */
|
|
guint32 msrp_ipaddr;
|
|
guint16 msrp_port_number;
|
|
if (str_to_ip((char*)tvb_get_string_enc(wmem_packet_scope(), tvb, address_offset, port_offset-address_offset, ENC_UTF_8|ENC_NA),
|
|
&msrp_ipaddr)) {
|
|
/* Get port number */
|
|
if (ws_strtou16(tvb_get_string_enc(wmem_packet_scope(), tvb, port_offset + 1,
|
|
port_end_offset - port_offset - 1, ENC_UTF_8|ENC_NA), NULL, &msrp_port_number)) {
|
|
/* Port and address are usable, store for later use in
|
|
* complete_descriptions (overrides the "c=" address). */
|
|
alloc_address_wmem(wmem_file_scope(), &media_desc->media_attr.msrp.ipaddr, AT_IPv4, 4, &msrp_ipaddr);
|
|
media_desc->media_attr.msrp.port_number = msrp_port_number;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case SDP_H248_ITEM:
|
|
/* Decode h248 item ITU-T Rec. H.248.12 (2001)/Amd.1 (11/2002)*/
|
|
if (strncmp((char*)attribute_value, h324ext_h223lcparm, strlen(msrp_res)) == 0) {
|
|
/* A.5.1.3 H.223 Logical channel parameters
|
|
* This property indicates the H.245
|
|
* H223LogicalChannelsParameters structure encoded by applying the PER specified in
|
|
* ITU-T Rec. X.691. Value encoded as per A.5.1.2. For text encoding the mechanism defined
|
|
* in ITU-T Rec. H.248.15 is used.
|
|
*/
|
|
gint len;
|
|
asn1_ctx_t actx;
|
|
|
|
len = (gint)strlen(attribute_value);
|
|
h245_tvb = ascii_bytes_to_tvb(tvb, pinfo, len, attribute_value);
|
|
/* arbitrary maximum length */
|
|
/* should go through a handle, however, the two h245 entry
|
|
points are different, one is over tpkt and the other is raw
|
|
*/
|
|
if (h245_tvb) {
|
|
asn1_ctx_init(&actx, ASN1_ENC_PER, TRUE, pinfo);
|
|
dissect_h245_H223LogicalChannelParameters(h245_tvb, 0, &actx,
|
|
sdp_media_attribute_tree,
|
|
hf_SDPh223LogicalChannelParameters);
|
|
}
|
|
}
|
|
break;
|
|
case SDP_CRYPTO:
|
|
/* http://tools.ietf.org/html/rfc4568
|
|
* 9.1. Generic "Crypto" Attribute Grammar
|
|
*
|
|
* The ABNF grammar for the crypto attribute is defined below:
|
|
*
|
|
* "a=crypto:" tag 1*WSP crypto-suite 1*WSP key-params
|
|
* *(1*WSP session-param)
|
|
*
|
|
* tag = 1*9DIGIT
|
|
* crypto-suite = 1*(ALPHA / DIGIT / "_")
|
|
*
|
|
* key-params = key-param *(";" key-param)
|
|
* key-param = key-method ":" key-info
|
|
* key-method = "inline" / key-method-ext
|
|
* key-method-ext = 1*(ALPHA / DIGIT / "_")
|
|
* key-info = 1*(%x21-3A / %x3C-7E) ; visible (printing) chars
|
|
* ; except semi-colon
|
|
* session-param = 1*(VCHAR) ; visible (printing) characters
|
|
*
|
|
* where WSP, ALPHA, DIGIT, and VCHAR are defined in [RFC4234].
|
|
*
|
|
*/
|
|
|
|
/* We are at the first colon */
|
|
/* tag */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_attribute_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
crypto_tag_valid = ws_strtou32(tvb_get_string_enc(wmem_packet_scope(), tvb, offset,
|
|
tokenlen, ENC_UTF_8|ENC_NA), NULL, &crypto_tag);
|
|
pi = proto_tree_add_uint(sdp_media_attribute_tree, hf_sdp_crypto_tag, tvb, offset, tokenlen,
|
|
crypto_tag);
|
|
if (!crypto_tag_valid)
|
|
expert_add_info(pinfo, pi, &ei_sdp_invalid_crypto_tag);
|
|
offset = next_offset + 1;
|
|
|
|
/* crypto-suite */
|
|
tokenlen = find_next_token_in_line(tvb, sdp_media_attribute_tree, &offset, &next_offset);
|
|
if (tokenlen == 0)
|
|
return;
|
|
parameter_item = proto_tree_add_item(sdp_media_attribute_tree, hf_sdp_crypto_crypto_suite,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (tvb_strncaseeql(tvb, offset, "AES_CM_128_HMAC_SHA1_80", tokenlen) == 0) {
|
|
|
|
/* XXX This may only work in simple cases */
|
|
if (transport_info->encryption_algorithm == SRTP_ENC_ALG_NOT_SET) {
|
|
transport_info->encryption_algorithm = SRTP_ENC_ALG_AES_CM;
|
|
transport_info->auth_algorithm = SRTP_AUTH_ALG_HMAC_SHA1;
|
|
/* number of octets used for the Auth Tag in the RTP payload */
|
|
transport_info->auth_tag_len = 10;
|
|
}
|
|
master_key_length = 16; /* 128 bits = 16 octets */
|
|
master_salt_length = 14; /* 112 bits = 14 octets */
|
|
} else if (tvb_strncaseeql(tvb, offset, "AES_CM_128_HMAC_SHA1_32", tokenlen) == 0) {
|
|
/* XXX This may only work in simple cases */
|
|
if (transport_info->encryption_algorithm == SRTP_ENC_ALG_NOT_SET) {
|
|
transport_info->encryption_algorithm = SRTP_ENC_ALG_AES_CM;
|
|
transport_info->auth_algorithm = SRTP_AUTH_ALG_HMAC_SHA1;
|
|
/* number of octets used for the Auth Tag in the RTP payload */
|
|
transport_info->auth_tag_len = 4;
|
|
}
|
|
master_key_length = 16; /* 128 bits = 16 octets */
|
|
master_salt_length = 14; /* 112 bits = 14 octets */
|
|
} else if (tvb_strncaseeql(tvb, offset, "F8_128_HMAC_SHA1_80", tokenlen) == 0) {
|
|
if (transport_info->encryption_algorithm == SRTP_ENC_ALG_NOT_SET) {
|
|
/* XXX This may only work in simple cases */
|
|
transport_info->encryption_algorithm = SRTP_ENC_ALG_AES_F8;
|
|
transport_info->auth_algorithm = SRTP_AUTH_ALG_HMAC_SHA1;
|
|
/* number of octets used for the Auth Tag in the RTP payload */
|
|
transport_info->auth_tag_len = 10;
|
|
}
|
|
master_key_length = 16; /* 128 bits = 16 octets */
|
|
master_salt_length = 14; /* 112 bits = 14 octets */
|
|
}
|
|
offset = next_offset + 1;
|
|
|
|
/* key-params */
|
|
while (has_more_pars == TRUE) {
|
|
int param_end_offset;
|
|
tvbuff_t *key_salt_tvb;
|
|
gchar *data_p = NULL;
|
|
|
|
param_end_offset = tvb_find_guint8(tvb, offset, -1, ';');
|
|
if (param_end_offset == -1) {
|
|
has_more_pars = FALSE;
|
|
param_end_offset = tvb_captured_length(tvb);
|
|
}
|
|
/* key-method or key-method-ext */
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
if (next_offset == -1) {
|
|
expert_add_info(pinfo, parameter_item, &ei_sdp_invalid_key_param);
|
|
break;
|
|
}
|
|
|
|
if (tvb_strncaseeql(tvb, offset, "inline", next_offset-offset) == 0) {
|
|
parameter_tree = proto_tree_add_subtree(sdp_media_attribute_tree, tvb, offset,
|
|
param_end_offset-offset, ett_sdp_crypto_key_parameters, NULL, "Key parameters");
|
|
/* XXX only for SRTP? */
|
|
/* srtp-key-info = key-salt ["|" lifetime] ["|" mki] */
|
|
offset = next_offset +1;
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '|');
|
|
if (next_offset == -1) {
|
|
tokenlen = param_end_offset - offset;
|
|
} else {
|
|
tokenlen = next_offset - offset;
|
|
}
|
|
data_p = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
key_salt_tvb = base64_to_tvb(tvb, data_p);
|
|
add_new_data_source(pinfo, key_salt_tvb, "Key_Salt_tvb");
|
|
if (master_key_length != 0) {
|
|
proto_tree_add_item(parameter_tree, hf_sdp_key_and_salt, tvb, offset, tokenlen, ENC_NA);
|
|
proto_tree_add_item(parameter_tree, hf_sdp_crypto_master_key,
|
|
key_salt_tvb, 0, master_key_length, ENC_NA);
|
|
proto_tree_add_item(parameter_tree, hf_sdp_crypto_master_salt,
|
|
key_salt_tvb, master_key_length, master_salt_length, ENC_NA);
|
|
} else {
|
|
proto_tree_add_item(parameter_tree, hf_sdp_key_and_salt, key_salt_tvb, 0, -1, ENC_NA);
|
|
}
|
|
|
|
/* ["|" lifetime] ["|" mki] are optional */
|
|
if (next_offset != -1) {
|
|
offset = next_offset + 1;
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, '|');
|
|
if (next_offset == -1) {
|
|
if (next_offset < param_end_offset){
|
|
next_offset = param_end_offset;
|
|
}
|
|
}
|
|
if (next_offset != -1) {
|
|
/*lifetime = ["2^"] 1*(DIGIT) ; see section 6.1 for "2^" */
|
|
tokenlen = next_offset - offset;
|
|
proto_tree_add_item(parameter_tree, hf_sdp_crypto_lifetime,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
}
|
|
/* mki = mki-value ":" mki-length
|
|
*
|
|
* mki-value = 1*DIGIT
|
|
*/
|
|
if (offset>param_end_offset) {
|
|
next_offset = -1;
|
|
} else {
|
|
next_offset = tvb_find_guint8(tvb, offset, -1, ':');
|
|
}
|
|
if (next_offset != -1) {
|
|
tokenlen = next_offset - offset;
|
|
proto_tree_add_item(parameter_tree, hf_sdp_crypto_mki, tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
offset = next_offset + 1;
|
|
|
|
/* mki-length = 1*3DIGIT ; range 1..128. */
|
|
next_offset = param_end_offset;
|
|
tokenlen = next_offset - offset;
|
|
|
|
/* This will not work if more than one parameter */
|
|
/* number of octets used for the MKI in the RTP payload */
|
|
mki_len_valid = ws_strtou32(tvb_get_string_enc(wmem_packet_scope(), tvb, offset, tokenlen,
|
|
ENC_UTF_8|ENC_NA), NULL, &transport_info->mki_len);
|
|
pi = proto_tree_add_item(parameter_tree, hf_sdp_crypto_mki_length,
|
|
tvb, offset, tokenlen, ENC_UTF_8|ENC_NA);
|
|
if (!mki_len_valid)
|
|
expert_add_info(pinfo, pi, &ei_sdp_invalid_crypto_mki_length);
|
|
}
|
|
}
|
|
offset = param_end_offset;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case SDP_CANDIDATE:
|
|
dissect_sdp_media_attribute_candidate(sdp_media_attribute_tree, tvb, offset);
|
|
break;
|
|
case SDP_ED137_TYPE:
|
|
/* Remember the value and add it to tree */
|
|
sdp_data->ed137_type = attribute_value;
|
|
proto_tree_add_item(sdp_media_attribute_tree, hf_media_attribute_value,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
case SDP_ED137_TXRXMODE:
|
|
/* Remember the value and add it to tree */
|
|
sdp_data->ed137_txrxmode = attribute_value;
|
|
proto_tree_add_item(sdp_media_attribute_tree, hf_media_attribute_value,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
case SDP_ED137_FID:
|
|
/* Remember the value and add it to tree */
|
|
sdp_data->ed137_fid = attribute_value;
|
|
proto_tree_add_item(sdp_media_attribute_tree, hf_media_attribute_value,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
default:
|
|
/* No special treatment for values of this attribute type, just add as one item. */
|
|
proto_tree_add_item(sdp_media_attribute_tree, hf_media_attribute_value,
|
|
tvb, offset, -1, ENC_UTF_8|ENC_NA);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
call_sdp_subdissector(tvbuff_t *tvb, packet_info *pinfo, int hf, proto_tree* ti, int length,
|
|
transport_info_t *transport_info,
|
|
session_info_t *session_info,
|
|
media_description_t *media_desc,
|
|
sdp_data_t *sdp_data)
|
|
{
|
|
if (hf == hf_owner) {
|
|
dissect_sdp_owner(tvb, ti);
|
|
} else if (hf == hf_connection_info) {
|
|
dissect_sdp_connection_info(tvb, ti, session_info, media_desc);
|
|
} else if (hf == hf_bandwidth) {
|
|
dissect_sdp_bandwidth(tvb, ti);
|
|
} else if (hf == hf_time) {
|
|
dissect_sdp_time(tvb, ti);
|
|
} else if (hf == hf_repeat_time) {
|
|
dissect_sdp_repeat_time(tvb, ti);
|
|
} else if (hf == hf_timezone) {
|
|
dissect_sdp_timezone(tvb, ti);
|
|
} else if (hf == hf_encryption_key) {
|
|
dissect_sdp_encryption_key(tvb, ti);
|
|
} else if (hf == hf_session_attribute) {
|
|
dissect_sdp_session_attribute(tvb, pinfo, ti);
|
|
} else if (hf == hf_media) {
|
|
dissect_sdp_media(tvb, pinfo, ti, media_desc);
|
|
} else if (hf == hf_media_attribute) {
|
|
dissect_sdp_media_attribute(tvb, pinfo, ti, length, transport_info, session_info, media_desc, sdp_data);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Post-processes the media descriptions after parsing it from the tvb. This
|
|
* performs processing that can only be done when the full media description is
|
|
* parsed (since otherwise the order of attributes could influence the result).
|
|
* Must be called before applying the SDP with apply_sdp_transport.
|
|
* It will remove media streams when the port number in the answer is zero.
|
|
*
|
|
* If the currently processed SDP is an Answer to a known previous Offer, then
|
|
* answer_offset is non-zero.
|
|
*/
|
|
static void
|
|
complete_descriptions(transport_info_t *transport_info, guint answer_offset)
|
|
{
|
|
guint media_count = wmem_array_get_count(transport_info->media_descriptions);
|
|
media_description_t *media_descs = (media_description_t *)wmem_array_get_raw(transport_info->media_descriptions);
|
|
|
|
DPRINT(("complete_descriptions called with answer_offset=%d media_count=%d",
|
|
answer_offset, media_count));
|
|
|
|
for (guint i = answer_offset; i < media_count; i++) {
|
|
media_description_t *media_desc = &media_descs[i];
|
|
|
|
/* If this is an answer to a previous offer... */
|
|
if (answer_offset > 0) {
|
|
/* A zero port removes the media stream (RFC 3264, Section 8.2) */
|
|
if (media_desc->media_port == 0) {
|
|
DPRINT(("disabling media_port=%d, for index=%d",
|
|
media_descs[i - answer_offset].media_port,
|
|
i - answer_offset));
|
|
media_descs[i - answer_offset].media_port = 0;
|
|
}
|
|
}
|
|
|
|
/* MSRP uses addresses discovered in attribute
|
|
rather than connection information of media session line */
|
|
if (media_desc->proto == SDP_PROTO_MSRP && msrp_handle &&
|
|
media_desc->media_attr.msrp.ipaddr.type != AT_NONE) {
|
|
/* clear old address and set new address and port. */
|
|
free_address_wmem(wmem_file_scope(), &media_desc->conn_addr);
|
|
copy_address_shallow(&media_desc->conn_addr,
|
|
&media_desc->media_attr.msrp.ipaddr);
|
|
media_desc->media_port = media_desc->media_attr.msrp.port_number;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Given is a structure containing the parsed result from the SDP (including
|
|
* protocol type (RTP, SRTP, T38, etc.), media info (payload type, etc.) and
|
|
* connection info (address, port). Register the addresss+port such that the
|
|
* protocol will be invoked for this tuple with the media information.
|
|
*
|
|
* For use with SDP using the Offer/Answer model (such as SIP with INVITE and
|
|
* 200 OK).
|
|
* XXX what about RTSP where the SDP merely provides media info, without
|
|
* actually establishing connections (Bug 5208).
|
|
*
|
|
* The passed transport information is modified: 'set_rtp' is set when the media
|
|
* is assigned to a conversation. Note that the unassigned media (payload types)
|
|
* are not freed, this is the responsibility of the caller.
|
|
*/
|
|
static void
|
|
apply_sdp_transport(packet_info *pinfo, transport_info_t *transport_info, int request_frame)
|
|
{
|
|
int establish_frame = 0;
|
|
|
|
struct srtp_info *srtp_info = NULL;
|
|
|
|
if (!global_sdp_establish_conversation) {
|
|
/* Do not register with other dissectors when this pref is disabled. */
|
|
return;
|
|
}
|
|
|
|
/* If no request_frame number has been found use this frame's number */
|
|
if (request_frame == 0) {
|
|
establish_frame = pinfo->num;
|
|
} else {
|
|
establish_frame = request_frame;
|
|
}
|
|
|
|
for (guint i = 0; i < wmem_array_get_count(transport_info->media_descriptions); i++) {
|
|
media_description_t *media_desc =
|
|
(media_description_t *)wmem_array_index(transport_info->media_descriptions, i);
|
|
guint32 current_rtp_port = 0;
|
|
|
|
/* Add (s)rtp and (s)rtcp conversation, if available (overrides t38 if conversation already set) */
|
|
if ((media_desc->media_port != 0) &&
|
|
(media_desc->proto == SDP_PROTO_RTP ||
|
|
media_desc->proto == SDP_PROTO_SRTP) &&
|
|
(media_desc->conn_addr.type == AT_IPv4 ||
|
|
media_desc->conn_addr.type == AT_IPv6)) {
|
|
|
|
if (media_desc->proto == SDP_PROTO_SRTP) {
|
|
srtp_info = wmem_new0(wmem_file_scope(), struct srtp_info);
|
|
if (transport_info->encryption_algorithm != SRTP_ENC_ALG_NOT_SET) {
|
|
srtp_info->encryption_algorithm = transport_info->encryption_algorithm;
|
|
srtp_info->auth_algorithm = transport_info->auth_algorithm;
|
|
srtp_info->mki_len = transport_info->mki_len;
|
|
srtp_info->auth_tag_len = transport_info->auth_tag_len;
|
|
|
|
}
|
|
DPRINT(("calling srtp_add_address, channel=%d, media_port=%d",
|
|
i, media_desc->media_port));
|
|
DINDENT();
|
|
/* srtp_add_address and rtp_add_address are given the request_frame's not this frame's number,
|
|
because that's where the RTP flow started, and thus conversation needs to check against */
|
|
srtp_add_address(pinfo, PT_UDP, &media_desc->conn_addr, media_desc->media_port, 0, "SDP", establish_frame,
|
|
media_desc->is_video,
|
|
media_desc->media.rtp_dyn_payload, srtp_info);
|
|
DENDENT();
|
|
} else {
|
|
DPRINT(("calling rtp_add_address, channel=%d, media_port=%d",
|
|
i, media_desc->media_port));
|
|
DINDENT();
|
|
rtp_add_address(pinfo, PT_UDP, &media_desc->conn_addr, media_desc->media_port, 0, "SDP", establish_frame,
|
|
media_desc->is_video,
|
|
media_desc->media.rtp_dyn_payload);
|
|
DENDENT();
|
|
}
|
|
media_desc->media.set_rtp = TRUE;
|
|
/* SPRT might use the same port... */
|
|
current_rtp_port = media_desc->media_port;
|
|
|
|
if (rtcp_handle) {
|
|
if (media_desc->proto == SDP_PROTO_SRTP) {
|
|
DPRINT(("calling rtcp_add_address, channel=%d, media_port=%d",
|
|
i, media_desc->media_port+1));
|
|
DINDENT();
|
|
srtcp_add_address(pinfo, &media_desc->conn_addr, media_desc->media_port+1, 0, "SDP", establish_frame, srtp_info);
|
|
DENDENT();
|
|
} else {
|
|
DPRINT(("calling rtcp_add_address, channel=%d, media_port=%d",
|
|
i, media_desc->media_port+1));
|
|
DINDENT();
|
|
rtcp_add_address(pinfo, &media_desc->conn_addr, media_desc->media_port+1, 0, "SDP", establish_frame);
|
|
DENDENT();
|
|
}
|
|
}
|
|
}
|
|
|
|
/* add SPRT conversation */
|
|
if (media_desc->proto == SDP_PROTO_SPRT &&
|
|
(media_desc->conn_addr.type == AT_IPv4 ||
|
|
media_desc->conn_addr.type == AT_IPv6) &&
|
|
(sprt_handle)) {
|
|
|
|
if (media_desc->media_port == 0 && current_rtp_port) {
|
|
sprt_add_address(pinfo, &media_desc->conn_addr, current_rtp_port,
|
|
0, "SDP", pinfo->num); /* will use same port as RTP */
|
|
} else {
|
|
sprt_add_address(pinfo, &media_desc->conn_addr, media_desc->media_port, 0, "SDP", pinfo->num);
|
|
}
|
|
}
|
|
|
|
/* Add t38 conversation, if available and only if no rtp */
|
|
if ((media_desc->media_port != 0) &&
|
|
!media_desc->media.set_rtp &&
|
|
media_desc->proto == SDP_PROTO_T38 &&
|
|
media_desc->conn_addr.type == AT_IPv4) {
|
|
t38_add_address(pinfo, &media_desc->conn_addr, media_desc->media_port, 0, "SDP", pinfo->num);
|
|
}
|
|
|
|
/* Add MSRP conversation. Uses addresses discovered in attribute
|
|
rather than connection information of media session line
|
|
(already handled in media conversion) */
|
|
if (media_desc->proto == SDP_PROTO_MSRP && msrp_handle) {
|
|
msrp_add_address(pinfo, &media_desc->conn_addr, media_desc->media_port, "SDP", pinfo->num);
|
|
}
|
|
|
|
} /* end of loop through all media descriptions. */
|
|
}
|
|
|
|
void
|
|
setup_sdp_transport(tvbuff_t *tvb, packet_info *pinfo, enum sdp_exchange_type exchange_type,
|
|
int request_frame, const gboolean delay)
|
|
{
|
|
gint offset = 0, next_offset, n;
|
|
int linelen;
|
|
gboolean in_media_description = FALSE;
|
|
guchar type, delim;
|
|
const int tokenoffset = 2;
|
|
int hf = -1;
|
|
gint start_transport_info_count = 0;
|
|
transport_info_t* transport_info = NULL;
|
|
media_description_t *media_desc = NULL;
|
|
session_info_t session_info;
|
|
sdp_data_t sdp_data;
|
|
|
|
DPRINT2(("-------------------- setup_sdp_transport -------------------"));
|
|
|
|
/* Only do this once during first pass */
|
|
if (pinfo->fd->flags.visited) {
|
|
DPRINT(("already visited"));
|
|
return;
|
|
}
|
|
|
|
memset(&sdp_data, 0, sizeof(sdp_data));
|
|
|
|
if (request_frame != 0)
|
|
transport_info = (transport_info_t*)wmem_tree_lookup32( sdp_transport_reqs, request_frame );
|
|
if (transport_info == NULL) {
|
|
transport_info = wmem_new0(wmem_file_scope(), transport_info_t);
|
|
transport_info->media_descriptions = wmem_array_new(wmem_file_scope(), sizeof(media_description_t));
|
|
|
|
for (n = 0; n < SDP_NO_OF_PT; n++) {
|
|
/* String is file scope allocated because transport_info is connection related */
|
|
transport_info->encoding_name[n] = wmem_strdup(wmem_file_scope(), UNKNOWN_ENCODING);
|
|
}
|
|
|
|
if (request_frame != 0)
|
|
wmem_tree_insert32(sdp_transport_reqs, request_frame, (void *)transport_info);
|
|
}
|
|
#ifdef DEBUG_CONVERSATION
|
|
else {
|
|
DPRINT(("found previous transport_info:"));
|
|
sdp_dump_transport_info(transport_info);
|
|
}
|
|
#endif
|
|
|
|
if (exchange_type != SDP_EXCHANGE_OFFER)
|
|
wmem_tree_insert32(sdp_transport_rsps, pinfo->num, (void *)transport_info);
|
|
|
|
/* Offer has already been answered or rejected and hash tables freed, so
|
|
* don't try to add to it
|
|
* XXX - Need to support "modified offers" */
|
|
if ((transport_info->sdp_status == SDP_EXCHANGE_ANSWER_REJECT) ||
|
|
(transport_info->sdp_status == SDP_EXCHANGE_ANSWER_ACCEPT))
|
|
return;
|
|
|
|
/* Initialize the session description before parsing the media descriptions. */
|
|
memset(&session_info, 0, sizeof(session_info_t));
|
|
session_info.rtp_dyn_payload = rtp_dyn_payload_new();
|
|
|
|
/* Remember where the answer should start (it will be zero if there was no
|
|
* previous offer with media descriptions). */
|
|
start_transport_info_count = wmem_array_get_count(transport_info->media_descriptions);
|
|
|
|
DPRINT(("start_transport_info_count=%d", start_transport_info_count));
|
|
|
|
/*
|
|
* Show the SDP message a line at a time.
|
|
*/
|
|
while (tvb_offset_exists(tvb, offset)) {
|
|
/*
|
|
* Find the end of the line.
|
|
*/
|
|
linelen = tvb_find_line_end_unquoted(tvb, offset, -1, &next_offset);
|
|
|
|
/*
|
|
* Line must contain at least e.g. "v=".
|
|
*/
|
|
if (linelen < 2)
|
|
break;
|
|
|
|
type = tvb_get_guint8(tvb, offset);
|
|
delim = tvb_get_guint8(tvb, offset + 1);
|
|
if (delim != '=') {
|
|
offset = next_offset;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Attributes. Only care about ones that affect the transport. Ignore others.
|
|
*/
|
|
switch (type) {
|
|
case 'c':
|
|
hf = hf_connection_info;
|
|
break;
|
|
case 'm':
|
|
hf = hf_media;
|
|
|
|
/* Try to create a new media description (it will return NULL if
|
|
* there are too many). */
|
|
media_desc = sdp_new_media_description(transport_info->media_descriptions, &session_info);
|
|
|
|
in_media_description = TRUE;
|
|
DPRINT(("in media description, media descriptions count=%d",
|
|
wmem_array_get_count(transport_info->media_descriptions)));
|
|
break;
|
|
case 'a':
|
|
if (in_media_description) {
|
|
hf = hf_media_attribute;
|
|
} else {
|
|
hf = hf_session_attribute;
|
|
}
|
|
break;
|
|
default:
|
|
hf = hf_unknown;
|
|
break;
|
|
}
|
|
|
|
if (hf != hf_unknown)
|
|
{
|
|
DINDENT();
|
|
call_sdp_subdissector(tvb_new_subset_length(tvb, offset + tokenoffset,
|
|
linelen - tokenoffset),
|
|
pinfo,
|
|
hf, NULL, linelen-tokenoffset,
|
|
transport_info,
|
|
in_media_description ? NULL : &session_info,
|
|
media_desc,
|
|
&sdp_data);
|
|
DENDENT();
|
|
}
|
|
|
|
offset = next_offset;
|
|
}
|
|
|
|
/* Done parsing media description, no more need for the session-level details. */
|
|
rtp_dyn_payload_free(session_info.rtp_dyn_payload);
|
|
session_info.rtp_dyn_payload = NULL;
|
|
|
|
/* Post-processing, close media streams, apply attributes, etc. */
|
|
complete_descriptions(transport_info, start_transport_info_count);
|
|
|
|
#ifdef DEBUG_CONVERSATION
|
|
sdp_dump_transport_info(transport_info);
|
|
#endif
|
|
|
|
/* We have a successful negotiation, apply data to their respective protocols */
|
|
if (!delay || ((exchange_type == SDP_EXCHANGE_ANSWER_ACCEPT) &&
|
|
(transport_info->sdp_status == SDP_EXCHANGE_OFFER))) {
|
|
/* Accepting answer to a previous offer (or delay pref is false). */
|
|
apply_sdp_transport(pinfo, transport_info, request_frame);
|
|
|
|
/* Free all media hash tables that were not assigned to a conversation
|
|
* ('set_rtp' is false) */
|
|
clean_unused_media_descriptions(transport_info->media_descriptions);
|
|
|
|
transport_info->sdp_status = exchange_type;
|
|
|
|
} else if ((exchange_type == SDP_EXCHANGE_ANSWER_REJECT) &&
|
|
(transport_info->sdp_status != SDP_EXCHANGE_ANSWER_REJECT)) {
|
|
/* Rejecting answer */
|
|
clean_unused_media_descriptions(transport_info->media_descriptions);
|
|
|
|
transport_info->sdp_status = SDP_EXCHANGE_ANSWER_REJECT;
|
|
} /* else attempt to accept an unknown offer. */
|
|
}
|
|
|
|
void setup_sdp_transport_resend(int current_frame, int request_frame)
|
|
{
|
|
transport_info_t* transport_info = NULL;
|
|
|
|
if (request_frame != 0) {
|
|
transport_info = (transport_info_t*)wmem_tree_lookup32( sdp_transport_reqs, request_frame );
|
|
if (transport_info != NULL) {
|
|
wmem_tree_insert32(sdp_transport_reqs, current_frame, (void *)transport_info);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
dissect_sdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
proto_tree *sdp_tree;
|
|
proto_item *ti, *sub_ti;
|
|
gint offset = 0, next_offset, n;
|
|
int linelen;
|
|
gboolean in_media_description;
|
|
guchar type, delim;
|
|
int datalen, tokenoffset, hf = -1;
|
|
char *string;
|
|
sdp_data_t sdp_data;
|
|
|
|
transport_info_t local_transport_info;
|
|
transport_info_t* transport_info = NULL;
|
|
media_description_t *media_desc = NULL;
|
|
session_info_t session_info;
|
|
sdp_packet_info *sdp_pi;
|
|
|
|
DPRINT2(("----------------------- dissect_sdp ------------------------"));
|
|
|
|
/* Initialise packet info for passing to tap */
|
|
sdp_pi = wmem_new(wmem_packet_scope(), sdp_packet_info);
|
|
sdp_pi->summary_str[0] = '\0';
|
|
|
|
memset(&sdp_data, 0, sizeof(sdp_data));
|
|
|
|
if (!pinfo->fd->flags.visited) {
|
|
transport_info = (transport_info_t*)wmem_tree_lookup32( sdp_transport_reqs, pinfo->num );
|
|
|
|
if (transport_info == NULL) {
|
|
/* Can't find it in the requests, make sure it's not a response */
|
|
transport_info = (transport_info_t*)wmem_tree_lookup32( sdp_transport_rsps, pinfo->num );
|
|
}
|
|
}
|
|
|
|
if (transport_info == NULL) {
|
|
transport_info = &local_transport_info;
|
|
}
|
|
#ifdef DEBUG_CONVERSATION
|
|
else {
|
|
DPRINT(("found previous transport_info:"));
|
|
sdp_dump_transport_info(transport_info);
|
|
}
|
|
#endif
|
|
|
|
/* Initialize local transport info */
|
|
memset(&local_transport_info, 0, sizeof(local_transport_info));
|
|
/* Note: packet-scoped since it is only needed while parsing this packet. */
|
|
local_transport_info.media_descriptions = wmem_array_new(wmem_packet_scope(), sizeof(media_description_t));
|
|
|
|
for (n = 0; n < SDP_NO_OF_PT; n++) {
|
|
local_transport_info.encoding_name[n] = wmem_strdup(wmem_packet_scope(), UNKNOWN_ENCODING);
|
|
}
|
|
|
|
/*
|
|
* As RFC 2327 says, "SDP is purely a format for session
|
|
* description - it does not incorporate a transport protocol,
|
|
* and is intended to use different transport protocols as
|
|
* appropriate including the Session Announcement Protocol,
|
|
* Session Initiation Protocol, Real-Time Streaming Protocol,
|
|
* electronic mail using the MIME extensions, and the
|
|
* Hypertext Transport Protocol."
|
|
*
|
|
* We therefore don't set the protocol or info columns;
|
|
* instead, we append to them, so that we don't erase
|
|
* what the protocol inside which the SDP stuff resides
|
|
* put there.
|
|
*/
|
|
col_append_str(pinfo->cinfo, COL_PROTOCOL, "/SDP");
|
|
|
|
ti = proto_tree_add_item(tree, proto_sdp, tvb, offset, -1, ENC_NA);
|
|
sdp_tree = proto_item_add_subtree(ti, ett_sdp);
|
|
|
|
/*
|
|
* Show the SDP message a line at a time.
|
|
*/
|
|
in_media_description = FALSE;
|
|
|
|
/* Initialize the session description before parsing the media level. */
|
|
memset(&session_info, 0, sizeof(session_info_t));
|
|
session_info.rtp_dyn_payload = rtp_dyn_payload_new();
|
|
|
|
while (tvb_offset_exists(tvb, offset)) {
|
|
/*
|
|
* Find the end of the line.
|
|
*/
|
|
linelen = tvb_find_line_end_unquoted(tvb, offset, -1, &next_offset);
|
|
|
|
/*
|
|
* Line must contain at least e.g. "v=".
|
|
*/
|
|
if (linelen < 2)
|
|
break;
|
|
|
|
type = tvb_get_guint8(tvb, offset);
|
|
delim = tvb_get_guint8(tvb, offset + 1);
|
|
if (delim != '=') {
|
|
proto_item *ti2 = proto_tree_add_item(sdp_tree, hf_invalid, tvb, offset, linelen, ENC_UTF_8|ENC_NA);
|
|
expert_add_info(pinfo, ti2, &ei_sdp_invalid_line_equal);
|
|
offset = next_offset;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Attributes.
|
|
*/
|
|
switch (type) {
|
|
case 'v':
|
|
hf = hf_protocol_version;
|
|
break;
|
|
case 'o':
|
|
hf = hf_owner;
|
|
break;
|
|
case 's':
|
|
hf = hf_session_name;
|
|
break;
|
|
case 'i':
|
|
if (in_media_description) {
|
|
hf = hf_media_title;
|
|
} else {
|
|
hf = hf_session_info;
|
|
}
|
|
break;
|
|
case 'u':
|
|
hf = hf_uri;
|
|
break;
|
|
case 'e':
|
|
hf = hf_email;
|
|
break;
|
|
case 'p':
|
|
hf = hf_phone;
|
|
break;
|
|
case 'c':
|
|
hf = hf_connection_info;
|
|
break;
|
|
case 'b':
|
|
hf = hf_bandwidth;
|
|
break;
|
|
case 't':
|
|
hf = hf_time;
|
|
break;
|
|
case 'r':
|
|
hf = hf_repeat_time;
|
|
break;
|
|
case 'm':
|
|
hf = hf_media;
|
|
|
|
/* Try to create a new media description (it will return NULL if
|
|
* there are too many). Pass local_transport_info since we do
|
|
* not want to modify the transport_info that was created by
|
|
* setup_sdp_transport. */
|
|
media_desc = sdp_new_media_description(local_transport_info.media_descriptions, &session_info);
|
|
|
|
in_media_description = TRUE;
|
|
break;
|
|
case 'k':
|
|
hf = hf_encryption_key;
|
|
break;
|
|
case 'a':
|
|
if (in_media_description) {
|
|
hf = hf_media_attribute;
|
|
} else {
|
|
hf = hf_session_attribute;
|
|
}
|
|
break;
|
|
case 'z':
|
|
hf = hf_timezone;
|
|
break;
|
|
default:
|
|
hf = hf_unknown;
|
|
break;
|
|
}
|
|
tokenoffset = 2;
|
|
if (hf == hf_unknown)
|
|
tokenoffset = 0;
|
|
string = (char*)tvb_get_string_enc(wmem_packet_scope(), tvb, offset + tokenoffset,
|
|
linelen - tokenoffset, ENC_ASCII);
|
|
sub_ti = proto_tree_add_string(sdp_tree, hf, tvb, offset, linelen,
|
|
string);
|
|
|
|
call_sdp_subdissector(tvb_new_subset_length(tvb, offset + tokenoffset,
|
|
linelen - tokenoffset),
|
|
pinfo,
|
|
hf, sub_ti, linelen-tokenoffset,
|
|
&local_transport_info,
|
|
in_media_description ? NULL : &session_info,
|
|
in_media_description ? media_desc : NULL,
|
|
&sdp_data);
|
|
|
|
offset = next_offset;
|
|
}
|
|
|
|
if (NULL != sdp_data.ed137_fid) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", sdp_data.ed137_fid);
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, sdp_data.ed137_fid, 50);
|
|
}
|
|
if (NULL != sdp_data.ed137_txrxmode) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", sdp_data.ed137_txrxmode);
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, sdp_data.ed137_txrxmode, 50);
|
|
}
|
|
if (NULL != sdp_data.ed137_type) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "%s ", sdp_data.ed137_type);
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, sdp_data.ed137_type, 50);
|
|
}
|
|
|
|
/* Done parsing media description, no more need for the session-level details. */
|
|
rtp_dyn_payload_free(session_info.rtp_dyn_payload);
|
|
session_info.rtp_dyn_payload = NULL;
|
|
|
|
/* Post-processing, close media streams, apply attributes, etc. */
|
|
if (transport_info == &local_transport_info) {
|
|
DPRINT(("no previous transport_info saved, calling complete_descriptions()"));
|
|
DINDENT();
|
|
complete_descriptions(transport_info, 0);
|
|
DENDENT();
|
|
#ifdef DEBUG_CONVERSATION
|
|
sdp_dump_transport_info(transport_info);
|
|
#endif
|
|
}
|
|
#ifdef DEBUG_CONVERSATION
|
|
else {
|
|
DPRINT(("not overwriting previous transport_info, local_transport_info contents:"));
|
|
sdp_dump_transport_info(&local_transport_info);
|
|
}
|
|
#endif
|
|
|
|
/* For messages not part of the Offer/Answer model, assume that the SDP is
|
|
* immediately effective (apply it now). */
|
|
if ((!pinfo->fd->flags.visited) && (transport_info == &local_transport_info)) {
|
|
/* XXX - This is a placeholder for higher layer protocols that haven't implemented the proper
|
|
* OFFER/ANSWER functionality using setup_sdp_transport(). Once all of the higher layers
|
|
* use setup_sdp_transport(), this should be removed
|
|
* Note that transport_info contains the SDP info from this frame (and
|
|
* not an earlier request (transport_info == &local_transport_info).
|
|
* Use 0 as request_frame since there is no (known) request.
|
|
*/
|
|
apply_sdp_transport(pinfo, transport_info, 0);
|
|
}
|
|
|
|
/* Add information to the VoIP Calls dialog. */
|
|
for (guint i = 0; i < wmem_array_get_count(local_transport_info.media_descriptions); i++)
|
|
{
|
|
media_desc = (media_description_t *)wmem_array_index(local_transport_info.media_descriptions, i);
|
|
|
|
if (media_desc->media_port != 0) {
|
|
/* Create the RTP summary str for the Voip Call analysis.
|
|
* XXX - Currently this is based only on the current packet
|
|
*/
|
|
for (int j = 0; j < media_desc->media.pt_count; j++)
|
|
{
|
|
DPRINT(("in for-loop for voip call analysis setting for media #%d, pt=%d",
|
|
j, media_desc->media. pt[j]));
|
|
/* if the payload type is dynamic (96 to 127), check the hash table to add the desc in the SDP summary */
|
|
if ((media_desc->media.pt[j] >= 96) && (media_desc->media.pt[j] <= 127)) {
|
|
const gchar *payload_type_str = rtp_dyn_payload_get_name(
|
|
media_desc->media.rtp_dyn_payload,
|
|
media_desc->media.pt[j]);
|
|
if (payload_type_str) {
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, payload_type_str, 50);
|
|
} else {
|
|
char num_pt[10];
|
|
g_snprintf(num_pt, 10, "%u", media_desc->media.pt[j]);
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, num_pt, 50);
|
|
}
|
|
} else {
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str,
|
|
val_to_str_ext(media_desc->media.pt[j], &rtp_payload_type_short_vals_ext, "%u"),
|
|
50);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Create the T38 summary str for the Voip Call analysis
|
|
* XXX - Currently this is based only on the current packet
|
|
*/
|
|
if ((media_desc->media_port != 0) && media_desc->proto == SDP_PROTO_T38) {
|
|
if (strlen(sdp_pi->summary_str))
|
|
g_strlcat(sdp_pi->summary_str, " ", 50);
|
|
g_strlcat(sdp_pi->summary_str, "t38", 50);
|
|
}
|
|
}
|
|
|
|
/* Free all media hash tables that were not assigned to a conversation
|
|
* ('set_rtp' is false) */
|
|
if (transport_info == &local_transport_info) {
|
|
clean_unused_media_descriptions(transport_info->media_descriptions);
|
|
}
|
|
|
|
datalen = tvb_captured_length_remaining(tvb, offset);
|
|
if (datalen > 0) {
|
|
proto_tree_add_item(sdp_tree, hf_sdp_data, tvb, offset, datalen, ENC_NA);
|
|
}
|
|
/* Report this packet to the tap */
|
|
tap_queue_packet(sdp_tap, pinfo, sdp_pi);
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_sdp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_protocol_version,
|
|
{ "Session Description Protocol Version (v)", "sdp.version",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner,
|
|
{ "Owner/Creator, Session Id (o)",
|
|
"sdp.owner", FT_STRING, BASE_NONE, NULL,
|
|
0x0, NULL, HFILL}
|
|
},
|
|
{ &hf_session_name,
|
|
{ "Session Name (s)", "sdp.session_name",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_session_info,
|
|
{ "Session Information (i)", "sdp.session_info",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_uri,
|
|
{ "URI of Description (u)", "sdp.uri",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_email,
|
|
{ "E-mail Address (e)", "sdp.email",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"E-mail Address", HFILL }
|
|
},
|
|
{ &hf_phone,
|
|
{ "Phone Number (p)", "sdp.phone",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info,
|
|
{ "Connection Information (c)", "sdp.connection_info",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bandwidth,
|
|
{ "Bandwidth Information (b)", "sdp.bandwidth",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_timezone,
|
|
{ "Time Zone Adjustments (z)", "sdp.timezone",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_encryption_key,
|
|
{ "Encryption Key (k)", "sdp.encryption_key",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_session_attribute,
|
|
{ "Session Attribute (a)", "sdp.session_attr",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_attribute,
|
|
{ "Media Attribute (a)", "sdp.media_attr",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_time,
|
|
{ "Time Description, active time (t)",
|
|
"sdp.time", FT_STRING, BASE_NONE, NULL,
|
|
0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_repeat_time,
|
|
{ "Repeat Time (r)", "sdp.repeat_time",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media,
|
|
{ "Media Description, name and address (m)",
|
|
"sdp.media", FT_STRING, BASE_NONE, NULL,
|
|
0x0, NULL, HFILL }
|
|
},
|
|
{ &hf_media_title,
|
|
{ "Media Title (i)", "sdp.media_title",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Media Title", HFILL }
|
|
},
|
|
{ &hf_unknown,
|
|
{ "Unknown", "sdp.unknown",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_invalid,
|
|
{ "Invalid line", "sdp.invalid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_username,
|
|
{ "Owner Username", "sdp.owner.username",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_sessionid,
|
|
{ "Session ID", "sdp.owner.sessionid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_version,
|
|
{ "Session Version", "sdp.owner.version",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_network_type,
|
|
{ "Owner Network Type", "sdp.owner.network_type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_address_type,
|
|
{ "Owner Address Type", "sdp.owner.address_type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_owner_address,
|
|
{ "Owner Address", "sdp.owner.address",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info_network_type,
|
|
{ "Connection Network Type", "sdp.connection_info.network_type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info_address_type,
|
|
{ "Connection Address Type", "sdp.connection_info.address_type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info_connection_address,
|
|
{ "Connection Address", "sdp.connection_info.address",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info_ttl,
|
|
{ "Connection TTL", "sdp.connection_info.ttl",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_connection_info_num_addr,
|
|
{ "Connection Number of Addresses", "sdp.connection_info.num_addr",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bandwidth_modifier,
|
|
{ "Bandwidth Modifier", "sdp.bandwidth.modifier",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_bandwidth_value,
|
|
{ "Bandwidth Value", "sdp.bandwidth.value",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Bandwidth Value (in kbits/s)", HFILL }
|
|
},
|
|
{ &hf_time_start,
|
|
{ "Session Start Time", "sdp.time.start",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_time_stop,
|
|
{ "Session Stop Time", "sdp.time.stop",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_repeat_time_interval,
|
|
{ "Repeat Interval", "sdp.repeat_time.interval",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_repeat_time_duration,
|
|
{ "Repeat Duration", "sdp.repeat_time.duration",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_repeat_time_offset,
|
|
{ "Repeat Offset", "sdp.repeat_time.offset",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_timezone_time,
|
|
{ "Timezone Time", "sdp.timezone.time",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_timezone_offset,
|
|
{ "Timezone Offset", "sdp.timezone.offset",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_encryption_key_type,
|
|
{ "Key Type", "sdp.encryption_key.type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_encryption_key_data,
|
|
{ "Key Data", "sdp.encryption_key.data",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_session_attribute_field,
|
|
{ "Session Attribute Fieldname", "sdp.session_attr.field",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_session_attribute_value,
|
|
{ "Session Attribute Value", "sdp.session_attr.value",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_media,
|
|
{ "Media Type", "sdp.media.media",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_port,
|
|
{ "Media Port", "sdp.media.port",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_port_string,
|
|
{ "Media Port", "sdp.media.port_string",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_portcount,
|
|
{ "Media Port Count", "sdp.media.portcount",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_proto,
|
|
{ "Media Protocol", "sdp.media.proto",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_format,
|
|
{ "Media Format", "sdp.media.format",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_attribute_field,
|
|
{ "Media Attribute Fieldname", "sdp.media_attribute.field",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_attribute_value,
|
|
{ "Media Attribute Value", "sdp.media_attribute.value",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_encoding_name,
|
|
{ "MIME Type", "sdp.mime.type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"SDP MIME Type", HFILL }
|
|
},
|
|
{ &hf_media_sample_rate,
|
|
{ "Sample Rate", "sdp.sample_rate",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_media_format_specific_parameter,
|
|
{ "Media format specific parameters", "sdp.fmtp.parameter",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Format specific parameter(fmtp)", HFILL }
|
|
},
|
|
{ &hf_ipbcp_version,
|
|
{ "IPBCP Protocol Version", "sdp.ipbcp.version",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ipbcp_type,
|
|
{ "IPBCP Command Type", "sdp.ipbcp.command",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{&hf_sdp_fmtp_mpeg4_profile_level_id,
|
|
{ "Level Code", "sdp.fmtp.profile_level_id",
|
|
FT_UINT32, BASE_DEC, VALS(mp4ves_level_indication_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_fmtp_h263_profile,
|
|
{ "Profile", "sdp.fmtp.h263profile",
|
|
FT_UINT32, BASE_DEC, VALS(h263_profile_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_fmtp_h263_level,
|
|
{ "Level", "sdp.fmtp.h263level",
|
|
FT_UINT32, BASE_DEC, VALS(h263_level_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_h264_packetization_mode,
|
|
{ "Packetization mode", "sdp.fmtp.h264_packetization_mode",
|
|
FT_UINT32, BASE_DEC, VALS(h264_packetization_mode_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_SDPh223LogicalChannelParameters,
|
|
{ "h223LogicalChannelParameters", "sdp.h223LogicalChannelParameters",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_key_mgmt_att_value,
|
|
{ "Key Management", "sdp.key_mgmt",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_key_mgmt_prtcl_id,
|
|
{ "Key Management Protocol (kmpid)", "sdp.key_mgmt.kmpid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_key_mgmt_data,
|
|
{ "Key Management Data", "sdp.key_mgmt.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_tag,
|
|
{ "tag", "sdp.crypto.tag",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_crypto_suite,
|
|
{ "Crypto suite", "sdp.crypto.crypto_suite",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_master_key,
|
|
{ "Master Key", "sdp.crypto.master_key",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_master_salt,
|
|
{ "Master salt", "sdp.crypto.master_salt",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_lifetime,
|
|
{ "Lifetime", "sdp.crypto.lifetime",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_mki,
|
|
{ "mki-value", "sdp.crypto.mki-valu",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_sdp_crypto_mki_length,
|
|
{ "mki_length", "sdp.crypto.mki_length",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ice_candidate_foundation,
|
|
{ "Foundation", "sdp.ice_candidate.foundation",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Identifier, same for two candidates with same type, base address, protocol and STUN server", HFILL }
|
|
},
|
|
{ &hf_ice_candidate_componentid,
|
|
{ "Component ID", "sdp.ice_candidate.componentid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Media component identifier (For RTP media, 1 is RTP, 2 is RTCP)", HFILL }
|
|
},
|
|
{ &hf_ice_candidate_transport,
|
|
{ "Transport", "sdp.ice_candidate.transport",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Transport protocol", HFILL }
|
|
},
|
|
{ &hf_ice_candidate_priority,
|
|
{ "Priority", "sdp.ice_candidate.priority",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_ice_candidate_address,
|
|
{ "Connection Address", "sdp.ice_candidate.address",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"IP address or FQDN of the candidate", HFILL }
|
|
},
|
|
{ &hf_ice_candidate_port,
|
|
{ "Candidate Port", "sdp.ice_candidate.port",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Port of the candidate", HFILL }
|
|
},
|
|
{ &hf_ice_candidate_type,
|
|
{ "Candidate Type", "sdp.ice_candidate.type",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"The origin of the address and port, i.e. where it was learned", HFILL }
|
|
},
|
|
/* Generated from convert_proto_tree_add_text.pl */
|
|
{ &hf_sdp_nal_unit_1_string, { "NAL unit 1 string", "sdp.nal_unit_1_string", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_sdp_nal_unit_2_string, { "NAL unit 2 string", "sdp.nal_unit_2_string", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_sdp_key_and_salt, { "Key and Salt", "sdp.key_and_salt", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
{ &hf_sdp_data, { "Data", "sdp.data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_sdp,
|
|
&ett_sdp_owner,
|
|
&ett_sdp_connection_info,
|
|
&ett_sdp_bandwidth,
|
|
&ett_sdp_time,
|
|
&ett_sdp_repeat_time,
|
|
&ett_sdp_timezone,
|
|
&ett_sdp_encryption_key,
|
|
&ett_sdp_session_attribute,
|
|
&ett_sdp_media,
|
|
&ett_sdp_media_attribute,
|
|
&ett_sdp_fmtp,
|
|
&ett_sdp_key_mgmt,
|
|
&ett_sdp_crypto_key_parameters,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_sdp_invalid_key_param,
|
|
{ "sdp.invalid_key_param",
|
|
PI_MALFORMED, PI_NOTE,
|
|
"Invalid key-param (no ':' delimiter)",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_line_equal,
|
|
{ "sdp.invalid_line.no_equal",
|
|
PI_MALFORMED, PI_NOTE,
|
|
"Invalid SDP line (no '=' delimiter)",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_line_fields,
|
|
{ "sdp.invalid_line.missing_fields",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid SDP line (missing required fields)",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_line_space,
|
|
{ "sdp.invalid_line.extra_space",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid SDP whitespace (extra space character)",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_conversion,
|
|
{ "sdp.invalid_conversion",
|
|
PI_PROTOCOL, PI_WARN,
|
|
"Invalid conversion",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_media_port,
|
|
{ "sdp.invalid_media_port",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid media port",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_sample_rate,
|
|
{ "sdp.invalid_sample_rate",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid sample rate",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_media_format,
|
|
{ "sdp.invalid_media_format",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid media format",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_crypto_tag,
|
|
{ "sdp.invalid_crypto_tag",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid crypto tag",
|
|
EXPFILL
|
|
}
|
|
},
|
|
{ &ei_sdp_invalid_crypto_mki_length,
|
|
{ "sdp.invalid_crypto_mki_length",
|
|
PI_MALFORMED, PI_ERROR,
|
|
"Invalid crypto mki length",
|
|
EXPFILL
|
|
}
|
|
}
|
|
};
|
|
|
|
module_t *sdp_module;
|
|
expert_module_t* expert_sdp;
|
|
|
|
proto_sdp = proto_register_protocol("Session Description Protocol",
|
|
"SDP", "sdp");
|
|
proto_register_field_array(proto_sdp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_sdp = expert_register_protocol(proto_sdp);
|
|
expert_register_field_array(expert_sdp, ei, array_length(ei));
|
|
|
|
key_mgmt_dissector_table = register_dissector_table("key_mgmt",
|
|
"Key Management", proto_sdp, FT_STRING, BASE_NONE);
|
|
/*
|
|
* Preferences registration
|
|
*/
|
|
sdp_module = prefs_register_protocol(proto_sdp, NULL);
|
|
prefs_register_bool_preference(sdp_module, "establish_conversation",
|
|
"Establish Media Conversation",
|
|
"Specifies that RTP/RTCP/T.38/MSRP/etc streams are decoded based "
|
|
"upon port numbers found in SDP payload",
|
|
&global_sdp_establish_conversation);
|
|
|
|
sdp_transport_reqs = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
sdp_transport_rsps = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
|
|
/*
|
|
* Register the dissector by name, so other dissectors can
|
|
* grab it by name rather than just referring to it directly.
|
|
*/
|
|
sdp_handle = register_dissector("sdp", dissect_sdp, proto_sdp);
|
|
|
|
/* Register for tapping */
|
|
sdp_tap = register_tap("sdp");
|
|
|
|
/* compile patterns */
|
|
ws_mempbrk_compile(&pbrk_digits, "0123456789");
|
|
ws_mempbrk_compile(&pbrk_alpha, "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_sdp(void)
|
|
{
|
|
rtcp_handle = find_dissector_add_dependency("rtcp", proto_sdp);
|
|
msrp_handle = find_dissector_add_dependency("msrp", proto_sdp);
|
|
sprt_handle = find_dissector_add_dependency("sprt", proto_sdp);
|
|
h264_handle = find_dissector_add_dependency("h264", proto_sdp);
|
|
mp4ves_config_handle = find_dissector_add_dependency("mp4ves_config", proto_sdp);
|
|
|
|
proto_sprt = dissector_handle_get_protocol_index(find_dissector("sprt"));
|
|
|
|
dissector_add_string("media_type", "application/sdp", sdp_handle);
|
|
dissector_add_uint("bctp.tpi", 0x20, sdp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|