forked from osmocom/wireshark
![Anders Broman](/assets/img/avatar_default.png)
Extensions to the h.245 dissector to extract H.223 Multiplex Code and Logical Channel setup messages, and pass this information to the H.223 dissector. svn path=/trunk/; revision=16139
424 lines
13 KiB
C
424 lines
13 KiB
C
/* packet-h245_asn1.c
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* Routines for h245 packet dissection
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* Copyright 2004, Anders Broman <anders.broman@ericsson.com>
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* To quote the author of the previous H245 dissector:
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* "This is a complete replacement of the previous limitied dissector
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* that Ronnie was crazy enough to write by hand. It was a lot of time
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* to hack it by hand, but it is incomplete and buggy and it is good when
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* it will go away."
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* Ronnie did a great job and all the VoIP users had made good use of it!
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* Credit to Tomas Kukosa for developing the Asn2eth compiler.
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/conversation.h>
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#include <stdio.h>
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#include <string.h>
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#include <epan/prefs.h>
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#include "tap.h"
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#include "packet-h245.h"
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#include "packet-tpkt.h"
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#include "packet-per.h"
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#include <epan/t35.h>
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#include <epan/emem.h>
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#include "packet-rtp.h"
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#include "packet-rtcp.h"
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#include "packet-ber.h"
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#include <epan/emem.h>
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#define PNAME "MULTIMEDIA-SYSTEM-CONTROL"
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#define PSNAME "H.245"
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#define PFNAME "h245"
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static dissector_handle_t rtp_handle=NULL;
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static dissector_handle_t rtcp_handle=NULL;
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static dissector_table_t nsp_object_dissector_table;
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static dissector_table_t nsp_h221_dissector_table;
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static dissector_handle_t nsp_handle;
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static dissector_handle_t data_handle;
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static dissector_handle_t h245_handle;
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static dissector_handle_t MultimediaSystemControlMessage_handle;
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static dissector_handle_t h263_handle = NULL;
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static dissector_handle_t amr_handle = NULL;
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static void reset_h245_packet_info(h245_packet_info *pi);
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static int hf_h245_pdu_type = -1;
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static int hf_h245Manufacturer = -1;
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static int h245_tap = -1;
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static int ett_h245 = -1;
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static int h245dg_tap = -1;
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h245_packet_info *h245_pi=NULL;
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static gboolean h245_reassembly = TRUE;
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static gboolean h245_shorttypes = FALSE;
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static const value_string h245_RequestMessage_short_vals[] = {
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{ 0, "NSM" },
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{ 1, "MSD" },
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{ 2, "TCS" },
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{ 3, "OLC" },
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{ 4, "CLC" },
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{ 5, "RCC" },
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{ 6, "MES" },
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{ 7, "RME" },
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{ 8, "RM" },
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{ 9, "RTDR" },
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{ 10, "MLR" },
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{ 11, "CMR" },
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{ 12, "CR" },
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{ 13, "MR" },
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{ 14, "LCRR" },
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{ 15, "GR" },
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{ 0, NULL }
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};
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static const value_string h245_ResponseMessage_short_vals[] = {
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{ 0, "NSM" },
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{ 1, "MSDAck" },
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{ 2, "MSDReject" },
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{ 3, "TCSAck" },
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{ 4, "TCSReject" },
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{ 5, "OLCAck" },
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{ 6, "OLCReject" },
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{ 7, "CLCAck" },
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{ 8, "RCCAck" },
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{ 9, "RCCReject" },
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{ 10, "MESAck" },
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{ 11, "MESReject" },
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{ 12, "RMEAck" },
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{ 13, "RMEReject" },
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{ 14, "RMAck" },
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{ 15, "RMReject" },
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{ 16, "RTDResponse" },
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{ 17, "MLAck" },
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{ 18, "MLReject" },
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{ 19, "CMResponse" },
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{ 20, "CResponse" },
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{ 21, "MResponse" },
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{ 22, "LCRAck" },
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{ 23, "LCRReject" },
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{ 24, "GR" },
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{ 0, NULL }
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};
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static const value_string h245_IndicationMessage_short_vals[] = {
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{ 0, "NSM" },
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{ 1, "FNU" },
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{ 2, "MSDRelease" },
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{ 3, "TCSRelease" },
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{ 4, "OLCConfirm" },
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{ 5, "RCCRelease" },
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{ 6, "MESRelease" },
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{ 7, "RMERelease" },
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{ 8, "RMRelease" },
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{ 9, "MI" },
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{ 10, "JI" },
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{ 11, "H223SI" },
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{ 12, "NATMVCI" },
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{ 13, "UII" },
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{ 14, "H2250MSI" },
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{ 15, "MCLI" },
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{ 16, "CI" },
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{ 17, "VI" },
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{ 18, "FNS" },
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{ 19, "MultilinkIndication" },
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{ 20, "LCRRelease" },
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{ 21, "FCIndication" },
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{ 22, "MMRI" },
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{ 22, "GI" },
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{ 0, NULL }
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};
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static const value_string h245_CommandMessage_short_vals[] = {
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{ 0, "NSM" },
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{ 1, "MLOC" },
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{ 2, "STCS" },
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{ 3, "EC" },
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{ 4, "FCC" },
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{ 5, "ESC" },
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{ 6, "MC" },
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{ 7, "CMC" },
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{ 8, "CC" },
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{ 9, "H223MR" },
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{ 10, "NATMVCC" },
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{ 11, "MMRC" },
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{ 12, "GC" },
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{ 0, NULL }
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};
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static const value_string h245_AudioCapability_short_vals[] = {
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{ 0, "nonStd" },
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{ 1, "g711A" },
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{ 2, "g711A56k" },
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{ 3, "g711U" },
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{ 4, "g711U56k" },
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{ 5, "g722-64k" },
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{ 6, "g722-56k" },
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{ 7, "g722-48k" },
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{ 8, "g7231" },
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{ 9, "g728" },
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{ 10, "g729" },
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{ 11, "g729A" },
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{ 12, "is11172" },
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{ 13, "is13818" },
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{ 14, "g729B" },
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{ 15, "g729AB" },
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{ 16, "g7231C" },
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{ 17, "gsmFR" },
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{ 18, "gsmHR" },
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{ 19, "gsmEFR" },
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{ 20, "generic" },
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{ 21, "g729Ext" },
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{ 22, "vbd" },
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{ 23, "audioTelEvent" },
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{ 24, "audioTone" },
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{ 0, NULL }
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};
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/* To put the codec type only in COL_INFO when
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an OLC is read */
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const char* codec_type = NULL;
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static const char *standard_oid_str;
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static guint32 ipv4_address;
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static guint32 ipv4_port;
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static guint32 rtcp_ipv4_address;
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static guint32 rtcp_ipv4_port;
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static gboolean media_channel;
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static gboolean media_control_channel;
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/* NonStandardParameter */
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static const char *nsiOID;
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static guint32 h221NonStandard;
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static guint32 t35CountryCode;
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static guint32 t35Extension;
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static guint32 manufacturerCode;
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static const value_string h245_RFC_number_vals[] = {
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{ 2190, "RFC 2190 - H.263 Video Streams" },
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{ 2429, "RFC 2429 - 1998 Version of ITU-T Rec. H.263 Video (H.263+)" },
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{ 3267, "RFC 3267 - Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB)" },
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{ 0, NULL }
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};
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/* h223 multiplex codes */
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static h223_set_mc_handle_t h223_set_mc_handle = NULL;
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h223_mux_element *h223_me=NULL;
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guint8 h223_mc=0;
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void h245_set_h223_set_mc_handle( h223_set_mc_handle_t handle )
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{
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h223_set_mc_handle = handle;
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}
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/* h223 logical channels */
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typedef struct {
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h223_lc_params *fw_channel_params;
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h223_lc_params *rev_channel_params;
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} h223_pending_olc;
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static GHashTable* h223_pending_olc_reqs[] = { NULL, NULL };
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static dissector_handle_t h245_lc_dissector;
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static guint16 h245_lc_temp;
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static guint16 h223_fw_lc_num;
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static guint16 h223_rev_lc_num;
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static h223_lc_params *h223_lc_params_temp;
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static h223_lc_params *h223_fw_lc_params;
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static h223_lc_params *h223_rev_lc_params;
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static h223_add_lc_handle_t h223_add_lc_handle = NULL;
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static void h223_lc_init_dir( int dir )
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{
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if ( h223_pending_olc_reqs[dir] )
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g_hash_table_destroy( h223_pending_olc_reqs[dir] );
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h223_pending_olc_reqs[dir] = g_hash_table_new( g_direct_hash, g_direct_equal );
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}
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static void h223_lc_init()
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{
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h223_lc_init_dir( P2P_DIR_SENT );
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h223_lc_init_dir( P2P_DIR_RECV );
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h223_lc_params_temp = NULL;
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h245_lc_dissector = NULL;
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h223_fw_lc_num = 0;
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}
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void h245_set_h223_add_lc_handle( h223_add_lc_handle_t handle )
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{
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h223_add_lc_handle = handle;
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}
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/* Initialize the protocol and registered fields */
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int proto_h245 = -1;
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#include "packet-h245-hf.c"
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/* Initialize the subtree pointers */
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#include "packet-h245-ett.c"
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#include "packet-h245-fn.c"
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static void
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dissect_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
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{
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/*
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* MultimediaSystemControlMessage_handle is the handle for
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* dissect_h245_h245, so we don't want to do any h245_pi or tap stuff here.
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*/
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dissect_tpkt_encap(tvb, pinfo, parent_tree, h245_reassembly, MultimediaSystemControlMessage_handle);
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}
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static void
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dissect_h245_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
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{
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proto_item *it;
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proto_tree *tr;
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guint32 offset=0;
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if (check_col(pinfo->cinfo, COL_PROTOCOL)){
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col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
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}
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it=proto_tree_add_protocol_format(parent_tree, proto_h245, tvb, 0, tvb_length(tvb), PSNAME);
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tr=proto_item_add_subtree(it, ett_h245);
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/* assume that whilst there is more tvb data, there are more h245 commands */
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while ( tvb_length_remaining( tvb, offset>>3 )>0 ){
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h245_pi=ep_alloc(sizeof(h245_packet_info));
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offset = dissect_h245_MultimediaSystemControlMessage(tvb, offset, pinfo ,tr, hf_h245_pdu_type);
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tap_queue_packet(h245dg_tap, pinfo, h245_pi);
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offset = (offset+0x07) & 0xfffffff8;
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h245_pi = NULL;
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}
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}
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void
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dissect_h245_OpenLogicalChannelCodec(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, char *codec_str) {
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dissect_OpenLogicalChannel_PDU(tvb, pinfo, tree);
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if (h245_pi != NULL) h245_pi->msg_type = H245_OpenLogChn;
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if (codec_str && codec_type){
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strncpy(codec_str, codec_type, 50);
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}
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}
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/*--- proto_register_h245 -------------------------------------------*/
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void proto_register_h245(void) {
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/* List of fields */
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static hf_register_info hf[] = {
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{ &hf_h245_pdu_type,
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{ "PDU Type", "h245.pdu_type", FT_UINT32, BASE_DEC,
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VALS(h245_MultimediaSystemControlMessage_vals), 0, "Type of H.245 PDU", HFILL }},
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{ &hf_h245Manufacturer,
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{ "H.245 Manufacturer", "h245.Manufacturer", FT_UINT32, BASE_HEX,
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VALS(H221ManufacturerCode_vals), 0, "h245.H.221 Manufacturer", HFILL }},
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#include "packet-h245-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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&ett_h245,
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#include "packet-h245-ettarr.c"
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};
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module_t *h245_module;
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/* Register protocol */
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proto_h245 = proto_register_protocol(PNAME, PSNAME, PFNAME);
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/* Register fields and subtrees */
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proto_register_field_array(proto_h245, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* From Ronnie Sahlbergs original H245 dissector */
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h245_module = prefs_register_protocol(proto_h245, NULL);
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prefs_register_bool_preference(h245_module, "reassembly",
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"Reassemble H.245 messages spanning multiple TCP segments",
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"Whether the H.245 dissector should reassemble messages spanning multiple TCP segments."
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" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
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&h245_reassembly);
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prefs_register_bool_preference(h245_module, "shorttypes",
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"Show short message types",
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"Whether the dissector should show short names or the long names from the standard",
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&h245_shorttypes);
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register_dissector("h245dg", dissect_h245_h245, proto_h245);
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register_dissector("h245", dissect_h245, proto_h245);
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nsp_object_dissector_table = register_dissector_table("h245.nsp.object", "H.245 NonStandardParameter (object)", FT_STRING, BASE_NONE);
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nsp_h221_dissector_table = register_dissector_table("h245.nsp.h221", "H.245 NonStandardParameter (h221)", FT_UINT32, BASE_HEX);
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h245_tap = register_tap("h245");
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h245dg_tap = register_tap("h245dg");
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register_ber_oid_name("0.0.8.239.1.1","itu-t(0) recommendation(0) h(8) h239(239) generic-capabilities(1) h239ControlCapability(1)");
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register_ber_oid_name("0.0.8.239.1.2","itu-t(0) recommendation(0) h(8) h239(239) generic-capabilities(1) h239ExtendedVideoCapability(2)");
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register_ber_oid_name("0.0.8.239.2","itu-t(0) recommendation(0) h(8) h239(239) generic-message(2)");
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register_ber_oid_name("0.0.8.245.0.3","itu-t(0) recommendation(0) h(8) h245(245) version(0) 3");
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register_ber_oid_name("0.0.8.245.0.4","itu-t(0) recommendation(0) h(8) h245(245) version(0) 4");
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register_ber_oid_name("0.0.8.245.0.5","itu-t(0) recommendation(0) h(8) h245(245) version(0) 5");
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register_ber_oid_name("0.0.8.245.0.6","itu-t(0) recommendation(0) h(8) h245(245) version(0) 6");
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register_ber_oid_name("0.0.8.245.0.7","itu-t(0) recommendation(0) h(8) h245(245) version(0) 7");
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register_ber_oid_name("0.0.8.245.0.8","itu-t(0) recommendation(0) h(8) h245(245) version(0) 8");
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register_ber_oid_name("0.0.8.245.0.10","itu-t(0) recommendation(0) h(8) h245(245) version(0) 10");
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register_ber_oid_name("0.0.8.245.1.0.0","itu-t(0) recommendation(0) h(8) h245(245) generic-capabilities(1) video (0) ISO/IEC 14496-2 (0)= MPEG-4 video");
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register_ber_oid_name("0.0.8.245.1.1.0","itu-t(0) recommendation(0) h(8) h245(245) generic-capabilities(1) audio (1) ISO/IEC 14496-3 (0)= MPEG-4 audio");
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register_ber_oid_name("0.0.8.245.1.1.1","itu-t(0) recommendation(0) h(8) h245(245) generic-capabilities(1) audio(1) amr(1)");
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register_ber_oid_name("0.0.8.241.0.0.1","itu-t(0) recommendation(0) h(8) h241(241) specificVideoCodecCapabilities(0) h264(0) generic-capabilities(1)");
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}
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/*--- proto_reg_handoff_h245 ---------------------------------------*/
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void proto_reg_handoff_h245(void) {
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rtp_handle = find_dissector("rtp");
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rtcp_handle = find_dissector("rtcp");
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data_handle = find_dissector("data");
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h263_handle = find_dissector("h263data");
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amr_handle = find_dissector("amr_if2");
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h245_handle=create_dissector_handle(dissect_h245, proto_h245);
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dissector_add_handle("tcp.port", h245_handle);
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MultimediaSystemControlMessage_handle=create_dissector_handle(dissect_h245_h245, proto_h245);
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dissector_add_handle("udp.port", MultimediaSystemControlMessage_handle);
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h223_lc_init();
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}
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static void reset_h245_packet_info(h245_packet_info *pi)
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{
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if(pi == NULL) {
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return;
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}
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pi->msg_type = H245_OTHER;
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pi->frame_label[0] = '\0';
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g_snprintf(pi->comment, sizeof(pi->comment), "H245 ");
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}
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