forked from osmocom/wireshark
e6a22e689e
svn path=/trunk/; revision=26648
4527 lines
120 KiB
C
4527 lines
120 KiB
C
/* packet-rtcp.c
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*
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* $Id$
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*
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* Routines for RTCP dissection
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* RTCP = Real-time Transport Control Protocol
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*
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* Copyright 2000, Philips Electronics N.V.
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* Written by Andreas Sikkema <h323@ramdyne.nl>
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*
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* Copyright 2004, Anders Broman <anders.broman@ericsson.com>
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*
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* Copyright 2005, Nagarjuna Venna <nvenna@brixnet.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* This dissector tries to dissect the RTCP protocol according to Annex A
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* of ITU-T Recommendation H.225.0 (02/98) and RFC 1889
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* H.225.0 literally copies RFC 1889, but omitting a few sections.
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*
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* RTCP traffic is handled by an uneven UDP portnumber. This can be any
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* port number, but there is a registered port available, port 5005
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* See Annex B of ITU-T Recommendation H.225.0, section B.7
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*
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* Information on PoC can be found from http://www.openmobilealliance.org/
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*
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* RTCP XR is specified in RFC 3611.
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*
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* See also http://www.iana.org/assignments/rtp-parameters
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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 <stdio.h>
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#include <string.h>
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#include "packet-rtcp.h"
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#include "packet-rtp.h"
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#include "packet-ntp.h"
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#include <epan/conversation.h>
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#include <epan/prefs.h>
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#include <epan/emem.h>
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#include <epan/expert.h>
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#include <epan/strutil.h>
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/* Version is the first 2 bits of the first octet*/
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#define RTCP_VERSION(octet) ((octet) >> 6)
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/* Padding is the third bit; no need to shift, because true is any value
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other than 0! */
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#define RTCP_PADDING(octet) ((octet) & 0x20)
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/* Receiver/ Sender count is the 5 last bits */
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#define RTCP_COUNT(octet) ((octet) & 0x1F)
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static dissector_handle_t rtcp_handle;
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static const value_string rtcp_version_vals[] =
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{
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{ 0, "Old VAT Version" },
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{ 1, "First Draft Version" },
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{ 2, "RFC 1889 Version" },
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{ 0, NULL },
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};
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/* RTCP packet types according to Section A.11.1 */
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/* And http://www.iana.org/assignments/rtp-parameters */
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#define RTCP_SR 200
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#define RTCP_RR 201
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#define RTCP_SDES 202
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#define RTCP_BYE 203
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#define RTCP_APP 204
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#define RTCP_RTPFB 205
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#define RTCP_PSFB 206
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#define RTCP_XR 207
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/* Supplemental H.261 specific RTCP packet types according to Section C.3.5 */
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#define RTCP_FIR 192
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#define RTCP_NACK 193
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static const value_string rtcp_packet_type_vals[] =
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{
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{ RTCP_SR, "Sender Report" },
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{ RTCP_RR, "Receiver Report" },
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{ RTCP_SDES, "Source description" },
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{ RTCP_BYE, "Goodbye" },
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{ RTCP_APP, "Application specific" },
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{ RTCP_FIR, "Full Intra-frame Request (H.261)" },
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{ RTCP_NACK, "Negative Acknowledgement (H.261)" },
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{ RTCP_RTPFB, "Generic RTP Feedback" },
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{ RTCP_PSFB, "Payload-specific" },
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{ RTCP_XR, "Extended report (RFC 3611)"},
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{ 0, NULL }
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};
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/* RTCP SDES types (Section A.11.2) */
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#define RTCP_SDES_END 0
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#define RTCP_SDES_CNAME 1
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#define RTCP_SDES_NAME 2
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#define RTCP_SDES_EMAIL 3
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#define RTCP_SDES_PHONE 4
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#define RTCP_SDES_LOC 5
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#define RTCP_SDES_TOOL 6
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#define RTCP_SDES_NOTE 7
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#define RTCP_SDES_PRIV 8
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#define RTCP_SDES_H323_CADDR 9
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static const value_string rtcp_sdes_type_vals[] =
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{
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{ RTCP_SDES_END, "END" },
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{ RTCP_SDES_CNAME, "CNAME (user and domain)" },
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{ RTCP_SDES_NAME, "NAME (common name)" },
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{ RTCP_SDES_EMAIL, "EMAIL (e-mail address)" },
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{ RTCP_SDES_PHONE, "PHONE (phone number)" },
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{ RTCP_SDES_LOC, "LOC (geographic location)" },
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{ RTCP_SDES_TOOL, "TOOL (name/version of source app)" },
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{ RTCP_SDES_NOTE, "NOTE (note about source)" },
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{ RTCP_SDES_PRIV, "PRIV (private extensions)" },
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{ RTCP_SDES_H323_CADDR,"H323-CADDR (H.323 callable address)"},
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{ 0, NULL }
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};
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/* RTCP XR Blocks (Section 4, RTC 3611)
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* or http://www.iana.org/assignments/rtcp-xr-block-types */
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#define RTCP_XR_LOSS_RLE 1
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#define RTCP_XR_DUP_RLE 2
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#define RTCP_XR_PKT_RXTIMES 3
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#define RTCP_XR_REF_TIME 4
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#define RTCP_XR_DLRR 5
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#define RTCP_XR_STATS_SUMRY 6
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#define RTCP_XR_VOIP_METRCS 7
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#define RTCP_XR_BT_XNQ 8
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static const value_string rtcp_xr_type_vals[] =
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{
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{ RTCP_XR_LOSS_RLE, "Loss Run Length Encoding Report Block" },
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{ RTCP_XR_DUP_RLE, "Duplicate Run Length Encoding Report Block" },
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{ RTCP_XR_PKT_RXTIMES, "Packet Receipt Times Report Block" },
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{ RTCP_XR_REF_TIME, "Receiver Reference Time Report Block" },
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{ RTCP_XR_DLRR, "DLRR Report Block" },
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{ RTCP_XR_STATS_SUMRY, "Statistics Summary Report Block" },
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{ RTCP_XR_VOIP_METRCS, "VoIP Metrics Report Block" },
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{ RTCP_XR_BT_XNQ, "BT XNQ RTCP XR (RFC5093) Report Block" },
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{ 0, NULL}
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};
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/* XR VoIP Metrics Block - PLC Algorithms */
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static const value_string rtcp_xr_plc_algo_vals[] =
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{
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{ 0, "Unspecified" },
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{ 1, "Disabled" },
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{ 2, "Enhanced" },
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{ 3, "Standard" },
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{ 0, NULL }
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};
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/* XR VoIP Metrics Block - JB Adaptive */
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static const value_string rtcp_xr_jb_adaptive_vals[] =
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{
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{ 0, "Unknown" },
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{ 1, "Reserved" },
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{ 2, "Non-Adaptive" },
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{ 3, "Adaptive" },
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{ 0, NULL }
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};
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/* XR Stats Summary Block - IP TTL or Hop Limit */
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static const value_string rtcp_xr_ip_ttl_vals[] =
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{
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{ 0, "No TTL Values" },
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{ 1, "IPv4" },
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{ 2, "IPv6" },
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{ 3, "Undefined" },
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{ 0, NULL }
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};
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/* RTCP Application PoC1 Value strings
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* OMA-TS-PoC-UserPlane-V1_0-20060609-A
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*/
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#define TBCP_BURST_REQUEST 0
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#define TBCP_BURST_GRANTED 1
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#define TBCP_BURST_TAKEN_EXPECT_NO_REPLY 2
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#define TBCP_BURST_DENY 3
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#define TBCP_BURST_RELEASE 4
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#define TBCP_BURST_IDLE 5
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#define TBCP_BURST_REVOKE 6
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#define TBCP_BURST_ACKNOWLEDGMENT 7
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#define TBCP_QUEUE_STATUS_REQUEST 8
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#define TBCP_QUEUE_STATUS_RESPONSE 9
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#define TBCP_DISCONNECT 11
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#define TBCP_CONNECT 15
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#define TBCP_BURST_TAKEN_EXPECT_REPLY 18
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static const value_string rtcp_app_poc1_floor_cnt_type_vals[] =
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{
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{ TBCP_BURST_REQUEST, "TBCP Talk Burst Request"},
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{ TBCP_BURST_GRANTED, "TBCP Talk Burst Granted"},
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{ TBCP_BURST_TAKEN_EXPECT_NO_REPLY, "TBCP Talk Burst Taken (no ack expected)"},
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{ TBCP_BURST_DENY, "TBCP Talk Burst Deny"},
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{ TBCP_BURST_RELEASE, "TBCP Talk Burst Release"},
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{ TBCP_BURST_IDLE, "TBCP Talk Burst Idle"},
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{ TBCP_BURST_REVOKE, "TBCP Talk Burst Revoke"},
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{ TBCP_BURST_ACKNOWLEDGMENT, "TBCP Talk Burst Acknowledgement"},
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{ TBCP_QUEUE_STATUS_REQUEST, "TBCP Queue Status Request"},
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{ TBCP_QUEUE_STATUS_RESPONSE, "TBCP Queue Status Response"},
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{ TBCP_DISCONNECT, "TBCP Disconnect"},
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{ TBCP_CONNECT, "TBCP Connect"},
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{ TBCP_BURST_TAKEN_EXPECT_REPLY, "TBCP Talk Burst Taken (ack expected)"},
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{ 0, NULL }
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};
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static const value_string rtcp_app_poc1_reason_code1_vals[] =
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{
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{ 1, "Another PoC User has permission"},
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{ 2, "Internal PoC server error"},
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{ 3, "Only one participant in the group"},
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{ 4, "Retry-after timer has not expired"},
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{ 5, "Listen only"},
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{ 0, NULL }
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};
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static const value_string rtcp_app_poc1_reason_code2_vals[] =
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{
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{ 1, "Only one user"},
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{ 2, "Talk burst too long"},
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{ 3, "No permission to send a Talk Burst"},
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{ 4, "Talk burst pre-empted"},
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{ 0, NULL }
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};
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static const value_string rtcp_app_poc1_reason_code_ack_vals[] =
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{
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{ 0, "Accepted"},
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{ 1, "Busy"},
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{ 2, "Not accepted"},
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{ 0, NULL }
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};
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static const value_string rtcp_app_poc1_conn_sess_type_vals[] =
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{
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{ 0, "None"},
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{ 1, "1-to-1"},
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{ 2, "Ad-hoc"},
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{ 3, "Pre-arranged"},
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{ 4, "Chat"},
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{ 0, NULL }
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};
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static const value_string rtcp_app_poc1_qsresp_priority_vals[] =
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{
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{ 0, "No priority (un-queued)"},
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{ 1, "Normal priority"},
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{ 2, "High priority"},
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{ 3, "Pre-emptive priority"},
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{ 0, NULL }
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};
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/* RFC 4585 */
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static const value_string rtcp_rtpfb_fmt_vals[] =
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{
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{ 1, "Generic negative acknowledgement (NACK)"},
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{ 31, "Reserved for future extensions"},
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{ 0, NULL }
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};
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static const value_string rtcp_psfb_fmt_vals[] =
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{
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{ 1, "Picture Loss Indication"},
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{ 2, "Slice Loss Indication"},
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{ 3, "Reference Picture Selection Indication"},
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{ 15, "Application Layer Feedback"},
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{ 31, "Reserved for future extensions"},
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{ 0, NULL }
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};
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/* RTCP header fields */
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static int proto_rtcp = -1;
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static int hf_rtcp_version = -1;
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static int hf_rtcp_padding = -1;
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static int hf_rtcp_rc = -1;
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static int hf_rtcp_sc = -1;
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static int hf_rtcp_pt = -1;
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static int hf_rtcp_length = -1;
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static int hf_rtcp_ssrc_sender = -1;
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static int hf_rtcp_ntp = -1;
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static int hf_rtcp_ntp_msw = -1;
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static int hf_rtcp_ntp_lsw = -1;
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static int hf_rtcp_rtp_timestamp = -1;
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static int hf_rtcp_sender_pkt_cnt = -1;
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static int hf_rtcp_sender_oct_cnt = -1;
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static int hf_rtcp_ssrc_source = -1;
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static int hf_rtcp_ssrc_fraction = -1;
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static int hf_rtcp_ssrc_cum_nr = -1;
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static int hf_rtcp_ssrc_discarded = -1;
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/* First the 32 bit number, then the split
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* up 16 bit values */
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/* These two are added to a subtree */
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static int hf_rtcp_ssrc_ext_high_seq = -1;
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static int hf_rtcp_ssrc_high_seq = -1;
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static int hf_rtcp_ssrc_high_cycles = -1;
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static int hf_rtcp_ssrc_jitter = -1;
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static int hf_rtcp_ssrc_lsr = -1;
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static int hf_rtcp_ssrc_dlsr = -1;
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static int hf_rtcp_ssrc_csrc = -1;
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static int hf_rtcp_sdes_type = -1;
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static int hf_rtcp_sdes_length = -1;
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static int hf_rtcp_sdes_text = -1;
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static int hf_rtcp_sdes_prefix_len = -1;
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static int hf_rtcp_sdes_prefix_string= -1;
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static int hf_rtcp_subtype = -1;
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static int hf_rtcp_name_ascii = -1;
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static int hf_rtcp_app_data = -1;
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static int hf_rtcp_fsn = -1;
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static int hf_rtcp_blp = -1;
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static int hf_rtcp_padding_count = -1;
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static int hf_rtcp_padding_data = -1;
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static int hf_rtcp_profile_specific_extension = -1;
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static int hf_rtcp_app_poc1 = -1;
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static int hf_rtcp_app_poc1_subtype = -1;
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static int hf_rtcp_app_poc1_sip_uri = -1;
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static int hf_rtcp_app_poc1_disp_name = -1;
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static int hf_rtcp_app_poc1_priority = -1;
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static int hf_rtcp_app_poc1_request_ts = -1;
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static int hf_rtcp_app_poc1_stt = -1;
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static int hf_rtcp_app_poc1_partic = -1;
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static int hf_rtcp_app_poc1_ssrc_granted = -1;
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static int hf_rtcp_app_poc1_last_pkt_seq_no = -1;
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static int hf_rtcp_app_poc1_ignore_seq_no = -1;
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static int hf_rtcp_app_poc1_reason_code1 = -1;
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static int hf_rtcp_app_poc1_reason1_phrase = -1;
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static int hf_rtcp_app_poc1_reason_code2 = -1;
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static int hf_rtcp_app_poc1_new_time_request = -1;
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static int hf_rtcp_app_poc1_ack_subtype = -1;
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static int hf_rtcp_app_poc1_ack_reason_code = -1;
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static int hf_rtcp_app_poc1_qsresp_priority = -1;
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static int hf_rtcp_app_poc1_qsresp_position = -1;
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static int hf_rtcp_app_poc1_conn_content[5] = { -1, -1, -1, -1, -1 };
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static int hf_rtcp_app_poc1_conn_session_type = -1;
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static int hf_rtcp_app_poc1_conn_add_ind_mao = -1;
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static int hf_rtcp_app_poc1_conn_sdes_items[5] = { -1, -1, -1, -1, -1 };
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static int hf_rtcp_xr_block_type = -1;
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static int hf_rtcp_xr_block_specific = -1;
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static int hf_rtcp_xr_block_length = -1;
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static int hf_rtcp_xr_thinning = -1;
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static int hf_rtcp_xr_voip_metrics_burst_density = -1;
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static int hf_rtcp_xr_voip_metrics_gap_density = -1;
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static int hf_rtcp_xr_voip_metrics_burst_duration = -1;
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static int hf_rtcp_xr_voip_metrics_gap_duration = -1;
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static int hf_rtcp_xr_voip_metrics_rtdelay = -1;
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static int hf_rtcp_xr_voip_metrics_esdelay = -1;
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static int hf_rtcp_xr_voip_metrics_siglevel = -1;
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static int hf_rtcp_xr_voip_metrics_noiselevel = -1;
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static int hf_rtcp_xr_voip_metrics_rerl = -1;
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static int hf_rtcp_xr_voip_metrics_gmin = -1;
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static int hf_rtcp_xr_voip_metrics_rfactor = -1;
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static int hf_rtcp_xr_voip_metrics_extrfactor = -1;
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static int hf_rtcp_xr_voip_metrics_moslq = -1;
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static int hf_rtcp_xr_voip_metrics_moscq = -1;
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static int hf_rtcp_xr_voip_metrics_plc = -1;
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static int hf_rtcp_xr_voip_metrics_jbadaptive = -1;
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static int hf_rtcp_xr_voip_metrics_jbrate = -1;
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static int hf_rtcp_xr_voip_metrics_jbnominal = -1;
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static int hf_rtcp_xr_voip_metrics_jbmax = -1;
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static int hf_rtcp_xr_voip_metrics_jbabsmax = -1;
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static int hf_rtcp_xr_stats_loss_flag = -1;
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static int hf_rtcp_xr_stats_dup_flag = -1;
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static int hf_rtcp_xr_stats_jitter_flag = -1;
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static int hf_rtcp_xr_stats_ttl = -1;
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static int hf_rtcp_xr_beginseq = -1;
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static int hf_rtcp_xr_endseq = -1;
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static int hf_rtcp_xr_stats_lost = -1;
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static int hf_rtcp_xr_stats_dups = -1;
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static int hf_rtcp_xr_stats_minjitter = -1;
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static int hf_rtcp_xr_stats_maxjitter = -1;
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static int hf_rtcp_xr_stats_meanjitter = -1;
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static int hf_rtcp_xr_stats_devjitter = -1;
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static int hf_rtcp_xr_stats_minttl = -1;
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static int hf_rtcp_xr_stats_maxttl = -1;
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static int hf_rtcp_xr_stats_meanttl = -1;
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static int hf_rtcp_xr_stats_devttl = -1;
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static int hf_rtcp_xr_lrr = -1;
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|
static int hf_rtcp_xr_dlrr = -1;
|
|
static int hf_rtcp_length_check = -1;
|
|
static int hf_rtcp_bye_reason_not_padded = -1;
|
|
static int hf_rtcp_rtpfb_fmt = -1;
|
|
static int hf_rtcp_rtpfb_nack_pid = -1;
|
|
static int hf_rtcp_rtpfb_nack_blp = -1;
|
|
static int hf_rtcp_psfb_fmt = -1;
|
|
static int hf_rtcp_fci = -1;
|
|
static int hf_srtcp_e = -1;
|
|
static int hf_srtcp_index = -1;
|
|
static int hf_srtcp_mki = -1;
|
|
static int hf_srtcp_auth_tag = -1;
|
|
static int hf_rtcp_xr_btxnq_begseq = -1; /* added for BT XNQ block (RFC5093) */
|
|
static int hf_rtcp_xr_btxnq_endseq = -1;
|
|
static int hf_rtcp_xr_btxnq_vmaxdiff = -1;
|
|
static int hf_rtcp_xr_btxnq_vrange = -1;
|
|
static int hf_rtcp_xr_btxnq_vsum = -1;
|
|
static int hf_rtcp_xr_btxnq_cycles = -1;
|
|
static int hf_rtcp_xr_btxnq_jbevents = -1;
|
|
static int hf_rtcp_xr_btxnq_tdegnet = -1;
|
|
static int hf_rtcp_xr_btxnq_tdegjit = -1;
|
|
static int hf_rtcp_xr_btxnq_es = -1;
|
|
static int hf_rtcp_xr_btxnq_ses = -1;
|
|
static int hf_rtcp_xr_btxnq_spare = -1;
|
|
|
|
/* RTCP setup fields */
|
|
static int hf_rtcp_setup = -1;
|
|
static int hf_rtcp_setup_frame = -1;
|
|
static int hf_rtcp_setup_method = -1;
|
|
|
|
/* RTCP roundtrip delay fields */
|
|
static int hf_rtcp_last_sr_timestamp_frame = -1;
|
|
static int hf_rtcp_time_since_last_sr = -1;
|
|
static int hf_rtcp_roundtrip_delay = -1;
|
|
|
|
|
|
|
|
/* RTCP fields defining a sub tree */
|
|
static gint ett_rtcp = -1;
|
|
static gint ett_rtcp_sr = -1;
|
|
static gint ett_rtcp_rr = -1;
|
|
static gint ett_rtcp_sdes = -1;
|
|
static gint ett_rtcp_bye = -1;
|
|
static gint ett_rtcp_app = -1;
|
|
static gint ett_rtcp_rtpfb = -1;
|
|
static gint ett_rtcp_psfb = -1;
|
|
static gint ett_rtcp_xr = -1;
|
|
static gint ett_rtcp_fir = -1;
|
|
static gint ett_rtcp_nack = -1;
|
|
static gint ett_ssrc = -1;
|
|
static gint ett_ssrc_item = -1;
|
|
static gint ett_ssrc_ext_high = -1;
|
|
static gint ett_sdes = -1;
|
|
static gint ett_sdes_item = -1;
|
|
static gint ett_PoC1 = -1;
|
|
static gint ett_rtcp_setup = -1;
|
|
static gint ett_rtcp_roundtrip_delay = -1;
|
|
static gint ett_xr_block = -1;
|
|
static gint ett_xr_block_contents = -1;
|
|
static gint ett_xr_ssrc = -1;
|
|
static gint ett_xr_loss_chunk = -1;
|
|
static gint ett_poc1_conn_contents = -1;
|
|
static gint ett_rtcp_nack_blp = -1;
|
|
/* Protocol registration */
|
|
void proto_register_rtcp(void);
|
|
void proto_reg_handoff_rtcp(void);
|
|
|
|
/* Main dissection function */
|
|
static void dissect_rtcp( tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree );
|
|
|
|
/* Heuristic dissection */
|
|
static gboolean global_rtcp_heur = FALSE;
|
|
static gboolean dissect_rtcp_heur( tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree );
|
|
|
|
/* Displaying set info */
|
|
static gboolean global_rtcp_show_setup_info = TRUE;
|
|
static void show_setup_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
|
|
|
|
/* Related to roundtrip calculation (using LSR and DLSR) */
|
|
static gboolean global_rtcp_show_roundtrip_calculation = FALSE;
|
|
#define MIN_ROUNDTRIP_TO_REPORT_DEFAULT 10
|
|
static guint global_rtcp_show_roundtrip_calculation_minimum = MIN_ROUNDTRIP_TO_REPORT_DEFAULT;
|
|
static void remember_outgoing_sr(packet_info *pinfo, long lsr);
|
|
static void calculate_roundtrip_delay(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, guint32 lsr, guint32 dlsr);
|
|
static void add_roundtrip_delay_info(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree,
|
|
guint frame,
|
|
guint gap_between_reports, gint delay);
|
|
|
|
|
|
/* Set up an RTCP conversation using the info given */
|
|
void srtcp_add_address( packet_info *pinfo,
|
|
address *addr, int port,
|
|
int other_port,
|
|
const gchar *setup_method, guint32 setup_frame_number,
|
|
struct srtp_info *srtcp_info)
|
|
{
|
|
address null_addr;
|
|
conversation_t* p_conv;
|
|
struct _rtcp_conversation_info *p_conv_data = NULL;
|
|
|
|
/*
|
|
* If this isn't the first time this packet has been processed,
|
|
* we've already done this work, so we don't need to do it
|
|
* again.
|
|
*/
|
|
if (pinfo->fd->flags.visited)
|
|
{
|
|
return;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
printf("#%u: %srtcp_add_address(%s, %u, %u, %s, %u\n", pinfo->fd->num, (srtcp_info)?"s":"", address_to_str(addr), port, other_port, setup_method, setup_frame_number);
|
|
#endif
|
|
|
|
SET_ADDRESS(&null_addr, AT_NONE, 0, NULL);
|
|
|
|
/*
|
|
* Check if the ip address and port combination is not
|
|
* already registered as a conversation.
|
|
*/
|
|
p_conv = find_conversation( pinfo->fd->num, addr, &null_addr, PT_UDP, port, other_port,
|
|
NO_ADDR_B | (!other_port ? NO_PORT_B : 0));
|
|
|
|
/*
|
|
* If not, create a new conversation.
|
|
*/
|
|
if ( ! p_conv ) {
|
|
p_conv = conversation_new( pinfo->fd->num, addr, &null_addr, PT_UDP,
|
|
(guint32)port, (guint32)other_port,
|
|
NO_ADDR2 | (!other_port ? NO_PORT2 : 0));
|
|
}
|
|
|
|
/* Set dissector */
|
|
conversation_set_dissector(p_conv, rtcp_handle);
|
|
|
|
/*
|
|
* Check if the conversation has data associated with it.
|
|
*/
|
|
p_conv_data = conversation_get_proto_data(p_conv, proto_rtcp);
|
|
|
|
/*
|
|
* If not, add a new data item.
|
|
*/
|
|
if ( ! p_conv_data ) {
|
|
/* Create conversation data */
|
|
p_conv_data = se_alloc(sizeof(struct _rtcp_conversation_info));
|
|
if (!p_conv_data)
|
|
{
|
|
return;
|
|
}
|
|
memset(p_conv_data, 0, sizeof(struct _rtcp_conversation_info));
|
|
conversation_add_proto_data(p_conv, proto_rtcp, p_conv_data);
|
|
}
|
|
|
|
/*
|
|
* Update the conversation data.
|
|
*/
|
|
p_conv_data->setup_method_set = TRUE;
|
|
g_strlcpy(p_conv_data->setup_method, setup_method, MAX_RTCP_SETUP_METHOD_SIZE);
|
|
p_conv_data->setup_frame_number = setup_frame_number;
|
|
p_conv_data->srtcp_info = srtcp_info;
|
|
}
|
|
|
|
/* Set up an RTCP conversation using the info given */
|
|
void rtcp_add_address( packet_info *pinfo,
|
|
address *addr, int port,
|
|
int other_port,
|
|
const gchar *setup_method, guint32 setup_frame_number)
|
|
{
|
|
srtcp_add_address(pinfo, addr, port, other_port, setup_method, setup_frame_number, NULL);
|
|
}
|
|
|
|
static gboolean
|
|
dissect_rtcp_heur( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
|
|
{
|
|
unsigned int offset = 0;
|
|
unsigned int first_byte;
|
|
unsigned int packet_type;
|
|
|
|
/* This is a heuristic dissector, which means we get all the UDP
|
|
* traffic not sent to a known dissector and not claimed by
|
|
* a heuristic dissector called before us!
|
|
*/
|
|
|
|
if (!global_rtcp_heur)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* Was it sent between 2 odd-numbered ports? */
|
|
if (!(pinfo->srcport % 2) || !(pinfo->destport % 2))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* Look at first byte */
|
|
first_byte = tvb_get_guint8(tvb, offset);
|
|
|
|
/* Are version bits set to 2? */
|
|
if (((first_byte & 0xC0) >> 6) != 2)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* Look at packet type */
|
|
packet_type = tvb_get_guint8(tvb, offset + 1);
|
|
|
|
/* First packet within compound packet is supposed to be a sender
|
|
or receiver report.
|
|
- allow BYE because this happens anyway
|
|
- allow APP because TBCP ("PoC1") packets aren't compound... */
|
|
if (!((packet_type == RTCP_SR) || (packet_type == RTCP_RR) ||
|
|
(packet_type == RTCP_BYE) || (packet_type == RTCP_APP)))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* Overall length must be a multiple of 4 bytes */
|
|
if (tvb_length(tvb) % 4)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
/* OK, dissect as RTCP */
|
|
dissect_rtcp(tvb, pinfo, tree);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Dissect the length field. Append to this field text indicating the number of
|
|
actual bytes this translates to (i.e. (raw value + 1) * 4) */
|
|
int dissect_rtcp_length_field( proto_tree *tree, tvbuff_t *tvb, int offset)
|
|
{
|
|
proto_item *ti;
|
|
unsigned short raw_length = tvb_get_ntohs( tvb, offset );
|
|
ti = proto_tree_add_item( tree, hf_rtcp_length, tvb, offset, 2, FALSE);
|
|
proto_item_append_text(ti, " (%u bytes)", (raw_length+1)*4);
|
|
offset += 2;
|
|
return offset;
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_rtcp_nack( tvbuff_t *tvb, int offset, proto_tree *tree )
|
|
{
|
|
/* Packet type = FIR (H261) */
|
|
proto_tree_add_uint( tree, hf_rtcp_rc, tvb, offset, 1, tvb_get_guint8( tvb, offset ) );
|
|
offset++;
|
|
/* Packet type, 8 bits = APP */
|
|
proto_tree_add_item( tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
/* Packet length in 32 bit words minus one */
|
|
offset = dissect_rtcp_length_field(tree, tvb, offset);
|
|
|
|
/* SSRC */
|
|
proto_tree_add_uint( tree, hf_rtcp_ssrc_source, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* FSN, 16 bits */
|
|
proto_tree_add_uint( tree, hf_rtcp_fsn, tvb, offset, 2, tvb_get_ntohs( tvb, offset ) );
|
|
offset += 2;
|
|
|
|
/* BLP, 16 bits */
|
|
proto_tree_add_uint( tree, hf_rtcp_blp, tvb, offset, 2, tvb_get_ntohs( tvb, offset ) );
|
|
offset += 2;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_rtpfb( tvbuff_t *tvb, int offset, proto_tree *rtcp_tree, proto_item *top_item)
|
|
{
|
|
unsigned int rtcp_rtpfb_fmt = 0;
|
|
unsigned int rtcp_rtpfb_nack_pid = 0;
|
|
unsigned int rtcp_rtpfb_nack_blp = 0;
|
|
int i;
|
|
proto_item *ti;
|
|
proto_tree *bitfield_tree;
|
|
char strbuf[64];
|
|
int start_offset = offset;
|
|
int packet_length = 0;
|
|
int nack_num_frames_lost = 0;
|
|
|
|
/* Transport layer FB message */
|
|
/* Feedback message type (FMT): 5 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_rtpfb_fmt, tvb, offset, 1, FALSE );
|
|
rtcp_rtpfb_fmt = (tvb_get_guint8(tvb, offset) & 0x1f);
|
|
offset++;
|
|
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
packet_length = (tvb_get_ntohs(tvb, offset) + 1) * 4;
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
|
|
/* SSRC of packet sender, 32 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_ssrc_sender, tvb, offset, 4,
|
|
tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* SSRC of media source, 32 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_ssrc_sender, tvb, offset, 4,
|
|
tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* Transport-Layer Feedback Message Elements */
|
|
switch (rtcp_rtpfb_fmt) {
|
|
case 1:
|
|
/* NACK */
|
|
while ((offset - start_offset) < packet_length) {
|
|
proto_tree_add_item(rtcp_tree, hf_rtcp_rtpfb_nack_pid,
|
|
tvb, offset, 2, FALSE);
|
|
rtcp_rtpfb_nack_pid = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
ti = proto_tree_add_item(rtcp_tree, hf_rtcp_rtpfb_nack_blp,
|
|
tvb, offset, 2, FALSE);
|
|
proto_item_set_text(ti, "RTCP Transport Feedback NACK BLP: ");
|
|
rtcp_rtpfb_nack_blp = tvb_get_ntohs(tvb, offset);
|
|
bitfield_tree = proto_item_add_subtree( ti, ett_rtcp_nack_blp);
|
|
nack_num_frames_lost ++;
|
|
if (rtcp_rtpfb_nack_blp) {
|
|
for (i = 0; i < 16; i ++) {
|
|
g_snprintf(strbuf, 64, "Frame %d also lost", rtcp_rtpfb_nack_pid + i + 1);
|
|
proto_tree_add_text(bitfield_tree, tvb, offset, 2, "%s",
|
|
decode_boolean_bitfield(rtcp_rtpfb_nack_blp, (1<<i),
|
|
16, strbuf, ""));
|
|
if (rtcp_rtpfb_nack_blp & (1<<i)) {
|
|
proto_item *hidden_ti;
|
|
hidden_ti = proto_tree_add_uint(bitfield_tree, hf_rtcp_rtpfb_nack_pid,
|
|
tvb, offset, 2,
|
|
rtcp_rtpfb_nack_pid + i + 1);
|
|
PROTO_ITEM_SET_HIDDEN(hidden_ti);
|
|
proto_item_append_text(ti, "%d ", rtcp_rtpfb_nack_pid + i + 1);
|
|
nack_num_frames_lost ++;
|
|
}
|
|
}
|
|
} else {
|
|
proto_item_set_text(ti, "0 (No additional frames lost)");
|
|
}
|
|
offset += 2;
|
|
}
|
|
|
|
if (top_item) {
|
|
proto_item_append_text(top_item, ": NACK: %d frames lost", nack_num_frames_lost);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
/* Unknown FMT */
|
|
proto_tree_add_item(rtcp_tree, hf_rtcp_fci, tvb, offset, packet_length - offset, FALSE );
|
|
offset = start_offset + packet_length;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
static int
|
|
dissect_rtcp_psfb( tvbuff_t *tvb, int offset, proto_tree *rtcp_tree,
|
|
int packet_length )
|
|
{
|
|
unsigned int rtcp_psfb_fmt = 0;
|
|
|
|
/* Payload-specific FB message */
|
|
/* Feedback message type (FMT): 5 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_psfb_fmt, tvb, offset, 1, FALSE );
|
|
rtcp_psfb_fmt = (tvb_get_guint8(tvb, offset) & 0x1f);
|
|
offset++;
|
|
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
|
|
/* SSRC of packet sender, 32 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_ssrc_sender, tvb, offset, 4,
|
|
tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* SSRC of media source, 32 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_ssrc_sender, tvb, offset, 4,
|
|
tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* Feedback Control Information (FCI) */
|
|
if (packet_length > 2) {
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_fci, tvb, offset, packet_length - offset, FALSE );
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_fir( tvbuff_t *tvb, int offset, proto_tree *tree )
|
|
{
|
|
/* Packet type = FIR (H261) */
|
|
proto_tree_add_uint( tree, hf_rtcp_rc, tvb, offset, 1, tvb_get_guint8( tvb, offset ) );
|
|
offset++;
|
|
/* Packet type, 8 bits = APP */
|
|
proto_tree_add_item( tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
/* Packet length in 32 bit words minus one */
|
|
offset = dissect_rtcp_length_field(tree, tvb, offset);
|
|
|
|
/* SSRC */
|
|
proto_tree_add_uint( tree, hf_rtcp_ssrc_source, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_app( tvbuff_t *tvb,packet_info *pinfo, int offset, proto_tree *tree,
|
|
unsigned int padding, unsigned int packet_len, guint rtcp_subtype, guint32 app_length )
|
|
{
|
|
unsigned int counter = 0;
|
|
char ascii_name[5];
|
|
guint sdes_type = 0;
|
|
guint item_len = 0;
|
|
guint items_start_offset;
|
|
proto_tree *PoC1_tree;
|
|
proto_item *PoC1_item;
|
|
|
|
/* XXX If more application types are to be dissected it may be useful to use a table like in packet-sip.c */
|
|
static const char poc1_app_name_str[] = "PoC1";
|
|
|
|
|
|
/* SSRC / CSRC */
|
|
proto_tree_add_uint( tree, hf_rtcp_ssrc_source, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
|
|
/* Application Name (ASCII) */
|
|
for( counter = 0; counter < 4; counter++ )
|
|
ascii_name[ counter ] = tvb_get_guint8( tvb, offset + counter );
|
|
/* g_strlcpy( ascii_name, pd + offset, 4 ); */
|
|
ascii_name[4] = '\0';
|
|
proto_tree_add_string( tree, hf_rtcp_name_ascii, tvb, offset, 4,
|
|
ascii_name );
|
|
|
|
/* See if we can handle this application type */
|
|
if ( g_ascii_strncasecmp(ascii_name, poc1_app_name_str,4 ) == 0 )
|
|
{
|
|
/* PoC1 Application */
|
|
guint8 t2timer_code, participants_code;
|
|
proto_item *item;
|
|
item = proto_tree_add_uint( tree, hf_rtcp_app_poc1_subtype, tvb, offset - 8, 1, rtcp_subtype );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_add_fstr(pinfo->cinfo, COL_INFO,"(%s) %s",ascii_name,
|
|
val_to_str(rtcp_subtype,rtcp_app_poc1_floor_cnt_type_vals,"unknown (%u)") );
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
app_length = app_length -8;
|
|
if ( packet_len == 0 )
|
|
return offset; /* No more data */
|
|
/* Applications specific data */
|
|
if ( padding ) {
|
|
/* If there's padding present, we have to remove that from the data part
|
|
* The last octet of the packet contains the length of the padding
|
|
*/
|
|
packet_len -= tvb_get_guint8( tvb, offset + packet_len - 1 );
|
|
}
|
|
/* Create a subtree for the PoC1 Application items; we don't yet know
|
|
the length */
|
|
items_start_offset = offset;
|
|
|
|
/* Top-level poc tree */
|
|
PoC1_item = proto_tree_add_item(tree, hf_rtcp_app_poc1, tvb, offset, packet_len, FALSE);
|
|
PoC1_tree = proto_item_add_subtree( PoC1_item, ett_PoC1 );
|
|
|
|
/* Dissect it according to its subtype */
|
|
switch ( rtcp_subtype ) {
|
|
|
|
case TBCP_BURST_REQUEST:
|
|
{
|
|
guint8 code;
|
|
guint16 priority;
|
|
|
|
/* Both items here are optional */
|
|
if (tvb_reported_length_remaining( tvb, offset) == 0)
|
|
{
|
|
return offset;
|
|
}
|
|
|
|
/* Look for a code in the first byte */
|
|
code = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -=1;
|
|
|
|
/* Priority (optional) */
|
|
if (code == 102)
|
|
{
|
|
item_len = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -= 1;
|
|
if (item_len != 2) /* SHALL be 2 */
|
|
return offset;
|
|
|
|
priority = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_priority, tvb, offset, 2, FALSE );
|
|
offset += 2;
|
|
packet_len -= 2;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" \"%s\"",
|
|
val_to_str(priority,
|
|
rtcp_app_poc1_qsresp_priority_vals,
|
|
"Unknown"));
|
|
}
|
|
|
|
/* Look for (optional) next code */
|
|
if (tvb_reported_length_remaining( tvb, offset) == 0)
|
|
{
|
|
return offset;
|
|
}
|
|
code = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -=1;
|
|
|
|
}
|
|
|
|
/* Request timestamp (optional) */
|
|
if (code == 103)
|
|
{
|
|
gchar *buff;
|
|
item_len = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -= 1;
|
|
if (item_len != 8) /* SHALL be 8 */
|
|
return offset;
|
|
|
|
buff = ntp_fmt_ts(tvb_get_ptr(tvb, offset, 8));
|
|
proto_tree_add_string_format(PoC1_tree, hf_rtcp_app_poc1_request_ts,
|
|
tvb, offset, 8, ( const char* ) buff,
|
|
"Request timestamp: %s", buff );
|
|
offset += 8;
|
|
packet_len -=8;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " ts=\"%s\"", buff);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_GRANTED:
|
|
{
|
|
proto_item *ti;
|
|
guint16 stop_talking_time;
|
|
guint16 participants;
|
|
|
|
/* Stop talking timer (now mandatory) */
|
|
t2timer_code = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -=1;
|
|
if (t2timer_code != 101) /* SHALL be 101 */
|
|
return offset;
|
|
|
|
item_len = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -= 1;
|
|
if (item_len != 2) /* SHALL be 2 */
|
|
return offset;
|
|
|
|
stop_talking_time = tvb_get_ntohs(tvb, offset);
|
|
ti = proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_stt, tvb, offset, 2, FALSE );
|
|
|
|
/* Append text with meanings of value */
|
|
switch (stop_talking_time)
|
|
{
|
|
case 0:
|
|
proto_item_append_text(ti, " unknown");
|
|
break;
|
|
case 65535:
|
|
proto_item_append_text(ti, " infinity");
|
|
break;
|
|
default:
|
|
proto_item_append_text(ti, " seconds");
|
|
break;
|
|
}
|
|
offset += item_len;
|
|
packet_len -= item_len;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " stop-talking-time=%u",
|
|
stop_talking_time);
|
|
}
|
|
|
|
/* Participants (optional) */
|
|
if (tvb_reported_length_remaining( tvb, offset) == 0)
|
|
{
|
|
return offset;
|
|
}
|
|
participants_code = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -=1;
|
|
if (participants_code != 100) /* SHALL be 100 */
|
|
return offset;
|
|
|
|
item_len = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -= 1;
|
|
if (item_len != 2) /* SHALL be 2 */
|
|
return offset;
|
|
|
|
participants = tvb_get_ntohs(tvb, offset);
|
|
ti = proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_partic, tvb, offset, 2, FALSE );
|
|
|
|
/* Append text with meanings of extreme values */
|
|
switch (participants)
|
|
{
|
|
case 0:
|
|
proto_item_append_text(ti, " (not known)");
|
|
break;
|
|
case 65535:
|
|
proto_item_append_text(ti, " (or more)");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
offset += item_len;
|
|
packet_len -= item_len;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " participants=%u",
|
|
participants);
|
|
}
|
|
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_TAKEN_EXPECT_NO_REPLY:
|
|
case TBCP_BURST_TAKEN_EXPECT_REPLY:
|
|
{
|
|
guint16 participants;
|
|
proto_item *ti;
|
|
|
|
/* SSRC of PoC client */
|
|
proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_ssrc_granted, tvb, offset, 4, FALSE );
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
|
|
/* SDES type (must be CNAME) */
|
|
sdes_type = tvb_get_guint8( tvb, offset );
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_sdes_type, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
packet_len--;
|
|
if (sdes_type != RTCP_SDES_CNAME)
|
|
{
|
|
return offset;
|
|
}
|
|
|
|
/* SIP URI */
|
|
item_len = tvb_get_guint8( tvb, offset );
|
|
/* Item len of 1 because its an FT_UINT_STRING... */
|
|
proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_sip_uri,
|
|
tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " CNAME=\"%s\"",
|
|
tvb_get_ephemeral_string(tvb, offset, item_len));
|
|
}
|
|
|
|
offset += item_len;
|
|
packet_len = packet_len - item_len - 1;
|
|
|
|
/* In the application dependent data, the TBCP Talk Burst Taken message SHALL carry
|
|
* a SSRC field and SDES items, CNAME and MAY carry SDES item NAME to identify the
|
|
* PoC Client that has been granted permission to send a Talk Burst.
|
|
*
|
|
* The SDES item NAME SHALL be included if it is known by the PoC Server.
|
|
* Therefore the length of the packet will vary depending on number of SDES items
|
|
* and the size of the SDES items.
|
|
*/
|
|
if ( packet_len == 0 )
|
|
return offset;
|
|
|
|
/* SDES type (must be NAME if present) */
|
|
sdes_type = tvb_get_guint8( tvb, offset );
|
|
if (sdes_type == RTCP_SDES_NAME) {
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_sdes_type, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
packet_len--;
|
|
|
|
/* Display name */
|
|
item_len = tvb_get_guint8( tvb, offset );
|
|
/* Item len of 1 because its an FT_UINT_STRING... */
|
|
proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_disp_name,
|
|
tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " DISPLAY-NAME=\"%s\"",
|
|
tvb_get_ephemeral_string(tvb, offset, item_len));
|
|
}
|
|
|
|
offset += item_len;
|
|
packet_len = packet_len - item_len - 1;
|
|
|
|
if (packet_len == 0) {
|
|
return offset;
|
|
}
|
|
|
|
/* Move onto next 4-byte boundary */
|
|
if (offset % 4) {
|
|
int padding = (4-(offset%4));
|
|
offset += padding;
|
|
packet_len -= padding;
|
|
}
|
|
}
|
|
|
|
/* Participants (optional) */
|
|
if (tvb_reported_length_remaining( tvb, offset) == 0) {
|
|
return offset;
|
|
}
|
|
participants_code = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -=1;
|
|
if (participants_code != 100) { /* SHALL be 100 */
|
|
return offset;
|
|
}
|
|
item_len = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
packet_len -= 1;
|
|
if (item_len != 2) { /* SHALL be 2 */
|
|
return offset;
|
|
}
|
|
|
|
participants = tvb_get_ntohs(tvb, offset);
|
|
ti = proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_partic, tvb, offset, 2, FALSE );
|
|
|
|
/* Append text with meanings of extreme values */
|
|
switch (participants) {
|
|
case 0:
|
|
proto_item_append_text(ti, " (not known)");
|
|
break;
|
|
case 65535:
|
|
proto_item_append_text(ti, " (or more)");
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " Participants=%u",
|
|
participants);
|
|
}
|
|
|
|
offset += item_len;
|
|
packet_len -= item_len;
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_DENY:
|
|
{
|
|
guint8 reason_code;
|
|
|
|
/* Reason code */
|
|
reason_code = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_reason_code1, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
packet_len--;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " reason-code=\"%s\"",
|
|
val_to_str(reason_code,
|
|
rtcp_app_poc1_reason_code1_vals,
|
|
"Unknown"));
|
|
}
|
|
|
|
/* Reason phrase */
|
|
item_len = tvb_get_guint8( tvb, offset );
|
|
if ( item_len != 0 )
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_reason1_phrase, tvb, offset, 1, FALSE );
|
|
|
|
offset += (item_len+1);
|
|
packet_len -= (item_len+1);
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_RELEASE:
|
|
{
|
|
guint16 last_seq_no;
|
|
guint16 ignore_last_seq_no;
|
|
|
|
/* Sequence number of last RTP packet in burst */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_last_pkt_seq_no, tvb, offset, 2, FALSE );
|
|
last_seq_no = tvb_get_ntohs(tvb, offset);
|
|
|
|
/* Bit 16 is ignore flag */
|
|
offset += 2;
|
|
proto_tree_add_item(PoC1_tree, hf_rtcp_app_poc1_ignore_seq_no, tvb, offset, 2, FALSE );
|
|
ignore_last_seq_no = (tvb_get_ntohs(tvb, offset) & 0x8000);
|
|
|
|
if (!ignore_last_seq_no && check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " last_rtp_seq_no=%u",
|
|
last_seq_no);
|
|
}
|
|
|
|
/* 15 bits of padding follows */
|
|
|
|
offset += 2;
|
|
packet_len-=4;
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_IDLE:
|
|
break;
|
|
|
|
case TBCP_BURST_REVOKE:
|
|
{
|
|
/* Reason code */
|
|
guint16 reason_code = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_reason_code2, tvb, offset, 2, FALSE );
|
|
|
|
/* The meaning of this field depends upon the reason code... */
|
|
switch (reason_code)
|
|
{
|
|
case 1: /* Only one user */
|
|
/* No additional info */
|
|
break;
|
|
case 2: /* Talk burst too long */
|
|
/* Additional info is 16 bits with time (in seconds) client can request */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_new_time_request, tvb, offset + 2, 2, FALSE );
|
|
break;
|
|
case 3: /* No permission */
|
|
/* No additional info */
|
|
break;
|
|
case 4: /* Pre-empted */
|
|
/* No additional info */
|
|
break;
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " reason-code=\"%s\"",
|
|
val_to_str(reason_code,
|
|
rtcp_app_poc1_reason_code2_vals,
|
|
"Unknown"));
|
|
}
|
|
offset += 4;
|
|
packet_len-=4;
|
|
}
|
|
break;
|
|
|
|
case TBCP_BURST_ACKNOWLEDGMENT:
|
|
{
|
|
guint8 subtype;
|
|
|
|
/* Code of message being acknowledged */
|
|
subtype = (tvb_get_guint8(tvb, offset) & 0xf8) >> 3;
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_ack_subtype, tvb, offset, 1, FALSE );
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (for %s)",
|
|
val_to_str(subtype,
|
|
rtcp_app_poc1_floor_cnt_type_vals,
|
|
"Unknown"));
|
|
}
|
|
|
|
/* Reason code only seen if subtype was Connect */
|
|
if (subtype == TBCP_CONNECT)
|
|
{
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_ack_reason_code, tvb, offset, 2, FALSE );
|
|
}
|
|
|
|
/* 16 bits of padding follow */
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
}
|
|
break;
|
|
|
|
case TBCP_QUEUE_STATUS_REQUEST:
|
|
break;
|
|
|
|
case TBCP_QUEUE_STATUS_RESPONSE:
|
|
{
|
|
guint16 position;
|
|
proto_item *ti;
|
|
|
|
/* Priority */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_qsresp_priority, tvb, offset, 1, FALSE );
|
|
|
|
/* Queue position. 65535 indicates 'position not available' */
|
|
position = tvb_get_ntohs(tvb, offset+1);
|
|
ti = proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_qsresp_position, tvb, offset+1, 2, FALSE );
|
|
if (position == 0)
|
|
{
|
|
proto_item_append_text(ti, " (client is un-queued)");
|
|
}
|
|
if (position == 65535)
|
|
{
|
|
proto_item_append_text(ti, " (position not available)");
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " position=%u", position);
|
|
}
|
|
|
|
/* 1 bytes of padding follows */
|
|
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
}
|
|
break;
|
|
|
|
case TBCP_DISCONNECT:
|
|
break;
|
|
|
|
case TBCP_CONNECT:
|
|
{
|
|
proto_item *content = proto_tree_add_text(PoC1_tree, tvb, offset, 2, "SDES item content");
|
|
gboolean contents[5];
|
|
unsigned int i;
|
|
guint8 items_set = 0;
|
|
|
|
proto_tree *content_tree = proto_item_add_subtree(content, ett_poc1_conn_contents);
|
|
guint16 items_field = tvb_get_ntohs(tvb, offset );
|
|
|
|
/* Dissect each defined bit flag in the SDES item content */
|
|
for ( i = 0;
|
|
i < sizeof(contents) / sizeof(contents[0]) &&
|
|
i < sizeof(hf_rtcp_app_poc1_conn_content) /
|
|
sizeof(hf_rtcp_app_poc1_conn_content[0]);
|
|
++i )
|
|
{
|
|
proto_tree_add_item( content_tree, hf_rtcp_app_poc1_conn_content[i], tvb, offset, 2, FALSE );
|
|
contents[i] = items_field & (1 << (15-i));
|
|
if (contents[i]) ++items_set;
|
|
}
|
|
|
|
/* Show how many flags were set */
|
|
proto_item_append_text(content, " (%u items)", items_set);
|
|
|
|
/* Session type */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_conn_session_type, tvb, offset + 2, 1, FALSE );
|
|
|
|
/* Additional indications */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_conn_add_ind_mao, tvb, offset + 3, 1, FALSE );
|
|
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
|
|
/* One SDES item for every set flag in contents array */
|
|
for ( i = 0;
|
|
i < sizeof(contents) / sizeof(contents[0]);
|
|
++i ) {
|
|
if ( contents[i] ) {
|
|
guint sdes_type, sdes_len;
|
|
/* (sdes_type not currently used...). Could complain if type
|
|
doesn't match expected for item... */
|
|
sdes_type = tvb_get_guint8( tvb, offset++ );
|
|
sdes_len = tvb_get_guint8( tvb, offset );
|
|
|
|
/* Add SDES field indicated as present */
|
|
proto_tree_add_item( PoC1_tree, hf_rtcp_app_poc1_conn_sdes_items[i], tvb, offset, 1, FALSE );
|
|
|
|
/* Move past field */
|
|
offset += sdes_len + 1;
|
|
packet_len -= (sdes_len + 2);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
break;
|
|
}
|
|
offset += packet_len;
|
|
return offset;
|
|
}
|
|
else
|
|
{
|
|
/* Unhandled application type, just show app name and raw data */
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,"( %s ) subtype=%u",ascii_name, rtcp_subtype);
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
/* Applications specific data */
|
|
if ( padding ) {
|
|
/* If there's padding present, we have to remove that from the data part
|
|
* The last octet of the packet contains the length of the padding
|
|
*/
|
|
packet_len -= tvb_get_guint8( tvb, offset + packet_len - 1 );
|
|
}
|
|
proto_tree_add_item( tree, hf_rtcp_app_data, tvb, offset, packet_len, FALSE );
|
|
offset += packet_len;
|
|
|
|
return offset;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
static int
|
|
dissect_rtcp_bye( tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree,
|
|
unsigned int count )
|
|
{
|
|
unsigned int chunk = 1;
|
|
unsigned int reason_length = 0;
|
|
gint reason_offset = 0;
|
|
char* reason_text = NULL;
|
|
|
|
while ( chunk <= count ) {
|
|
/* source identifier, 32 bits */
|
|
proto_tree_add_item( tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
chunk++;
|
|
}
|
|
|
|
if ( tvb_reported_length_remaining( tvb, offset ) > 0 ) {
|
|
/* Bye reason consists of an 8 bit length l and a string with length l */
|
|
reason_length = tvb_get_guint8( tvb, offset );
|
|
proto_tree_add_item( tree, hf_rtcp_sdes_length, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
reason_offset = offset;
|
|
reason_text = (char*)tvb_get_ephemeral_string(tvb, offset, reason_length);
|
|
proto_tree_add_string( tree, hf_rtcp_sdes_text, tvb, offset, reason_length, reason_text );
|
|
offset += reason_length;
|
|
}
|
|
|
|
/* BYE packet padded out if string didn't fit in previous word */
|
|
if (offset % 4)
|
|
{
|
|
gint pad_size = (4 - (offset % 4));
|
|
int i;
|
|
|
|
/* Check padding */
|
|
for (i = 0; i < pad_size; i++)
|
|
{
|
|
if ((!(tvb_offset_exists(tvb, offset + i))) ||
|
|
(tvb_get_guint8(tvb, offset + i) != 0))
|
|
{
|
|
proto_item *ti;
|
|
ti = proto_tree_add_none_format(tree, hf_rtcp_bye_reason_not_padded,
|
|
tvb, reason_offset, reason_length,
|
|
"Reason string is not NULL padded (see RFC3550, section 6.6)");
|
|
expert_add_info_format(pinfo, ti, PI_MALFORMED, PI_WARN,
|
|
"Reason string is not NULL padded (see RFC3550, section 6.6)");
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
}
|
|
|
|
offset += pad_size;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static void
|
|
dissect_rtcp_sdes( tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
unsigned int count )
|
|
{
|
|
unsigned int chunk = 1;
|
|
proto_item *sdes_item;
|
|
proto_tree *sdes_tree;
|
|
proto_tree *sdes_item_tree;
|
|
proto_item *ti;
|
|
int start_offset;
|
|
int items_start_offset;
|
|
guint32 ssrc;
|
|
unsigned int item_len = 0;
|
|
unsigned int sdes_type = 0;
|
|
unsigned int prefix_len = 0;
|
|
|
|
while ( chunk <= count ) {
|
|
/* Create a subtree for this chunk; we don't yet know
|
|
the length. */
|
|
start_offset = offset;
|
|
|
|
ssrc = tvb_get_ntohl( tvb, offset );
|
|
sdes_item = proto_tree_add_text(tree, tvb, offset, -1,
|
|
"Chunk %u, SSRC/CSRC 0x%X", chunk, ssrc);
|
|
sdes_tree = proto_item_add_subtree( sdes_item, ett_sdes );
|
|
|
|
/* SSRC_n source identifier, 32 bits */
|
|
proto_tree_add_uint( sdes_tree, hf_rtcp_ssrc_source, tvb, offset, 4, ssrc );
|
|
offset += 4;
|
|
|
|
/* Create a subtree for the SDES items; we don't yet know
|
|
the length */
|
|
items_start_offset = offset;
|
|
ti = proto_tree_add_text(sdes_tree, tvb, offset, -1,
|
|
"SDES items" );
|
|
sdes_item_tree = proto_item_add_subtree( ti, ett_sdes_item );
|
|
|
|
/*
|
|
* Not every message is ended with "null" bytes, so check for
|
|
* end of frame as well.
|
|
*/
|
|
while ( tvb_reported_length_remaining( tvb, offset ) > 0 ) {
|
|
/* ID, 8 bits */
|
|
sdes_type = tvb_get_guint8( tvb, offset );
|
|
proto_tree_add_item( sdes_item_tree, hf_rtcp_sdes_type, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
if ( sdes_type == RTCP_SDES_END ) {
|
|
/* End of list */
|
|
break;
|
|
}
|
|
|
|
/* Item length, 8 bits */
|
|
item_len = tvb_get_guint8( tvb, offset );
|
|
proto_tree_add_item( sdes_item_tree, hf_rtcp_sdes_length, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
if ( item_len != 0 ) {
|
|
if ( sdes_type == RTCP_SDES_PRIV ) {
|
|
/* PRIV adds two items between the
|
|
* SDES length and value - an 8 bit
|
|
* length giving the length of a
|
|
* "prefix string", and the string.
|
|
*/
|
|
prefix_len = tvb_get_guint8( tvb, offset );
|
|
if ( prefix_len + 1 > item_len ) {
|
|
proto_tree_add_uint_format( sdes_item_tree,
|
|
hf_rtcp_sdes_prefix_len, tvb,
|
|
offset, 1, prefix_len,
|
|
"Prefix length: %u (bogus, must be <= %u)",
|
|
prefix_len, item_len - 1);
|
|
offset += item_len;
|
|
continue;
|
|
}
|
|
proto_tree_add_item( sdes_item_tree, hf_rtcp_sdes_prefix_len, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
|
|
proto_tree_add_item( sdes_item_tree, hf_rtcp_sdes_prefix_string, tvb, offset, prefix_len, FALSE );
|
|
offset += prefix_len;
|
|
item_len -= prefix_len +1;
|
|
if ( item_len == 0 )
|
|
continue;
|
|
}
|
|
proto_tree_add_item( sdes_item_tree, hf_rtcp_sdes_text, tvb, offset, item_len, FALSE );
|
|
offset += item_len;
|
|
}
|
|
}
|
|
|
|
/* Set the length of the items subtree. */
|
|
proto_item_set_len(ti, offset - items_start_offset);
|
|
|
|
/* 32 bits = 4 bytes, so.....
|
|
* If offset % 4 != 0, we divide offset by 4, add one and then
|
|
* multiply by 4 again to reach the boundary
|
|
*/
|
|
if ( offset % 4 != 0 )
|
|
offset = ((offset / 4) + 1 ) * 4;
|
|
|
|
/* Set the length of this chunk. */
|
|
proto_item_set_len(sdes_item, offset - start_offset);
|
|
|
|
chunk++;
|
|
}
|
|
}
|
|
|
|
static void parse_xr_type_specific_field(tvbuff_t *tvb, gint offset, guint block_type, proto_tree *tree)
|
|
{
|
|
guint8 flags = tvb_get_guint8(tvb, offset);
|
|
|
|
switch (block_type) {
|
|
case RTCP_XR_LOSS_RLE:
|
|
case RTCP_XR_DUP_RLE:
|
|
case RTCP_XR_PKT_RXTIMES:
|
|
proto_tree_add_uint(tree, hf_rtcp_xr_thinning, tvb, offset, 1, flags);
|
|
break;
|
|
|
|
case RTCP_XR_STATS_SUMRY:
|
|
proto_tree_add_boolean(tree, hf_rtcp_xr_stats_loss_flag, tvb, offset, 1, flags);
|
|
proto_tree_add_boolean(tree, hf_rtcp_xr_stats_dup_flag, tvb, offset, 1, flags);
|
|
proto_tree_add_boolean(tree, hf_rtcp_xr_stats_jitter_flag, tvb, offset, 1, flags);
|
|
proto_tree_add_uint(tree, hf_rtcp_xr_stats_ttl, tvb, offset, 1, flags);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_uint(tree, hf_rtcp_xr_block_specific, tvb, offset, 1, flags);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static gboolean validate_xr_block_length(tvbuff_t *tvb, int offset, guint block_type, guint block_len, proto_tree *tree)
|
|
{
|
|
proto_tree_add_uint(tree, hf_rtcp_xr_block_length, tvb, offset, 2, block_len);
|
|
switch (block_type) {
|
|
case RTCP_XR_REF_TIME:
|
|
if (block_len != 2)
|
|
proto_tree_add_text(tree, tvb, offset, 2, "Invalid block length, should be 2");
|
|
return FALSE;
|
|
|
|
case RTCP_XR_STATS_SUMRY:
|
|
if (block_len != 9)
|
|
proto_tree_add_text(tree, tvb, offset, 2, "Invalid block length, should be 9");
|
|
return FALSE;
|
|
|
|
case RTCP_XR_VOIP_METRCS:
|
|
case RTCP_XR_BT_XNQ:
|
|
if (block_len != 8)
|
|
proto_tree_add_text(tree, tvb, offset, 2, "Invalid block length, should be 8");
|
|
return FALSE;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_xr(tvbuff_t *tvb, packet_info *pinfo _U_, int offset, proto_tree *tree, gint packet_len)
|
|
{
|
|
guint block_num = 1;
|
|
guint temp_value = 0; /* used when checking spare bits in block type 8 */
|
|
|
|
/* Packet length should at least be 4 */
|
|
if (packet_len < 4) {
|
|
proto_tree_add_text(tree, tvb, offset, packet_len, "Missing Sender SSRC");
|
|
return offset + packet_len;
|
|
}
|
|
|
|
/* SSRC */
|
|
proto_tree_add_item( tree, hf_rtcp_ssrc_sender, tvb, offset, 4, FALSE );
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
|
|
for(;packet_len > 0; block_num++) {
|
|
guint block_type = tvb_get_guint8(tvb, offset), block_length = 0;
|
|
gint content_length = 0;
|
|
gboolean valid = TRUE;
|
|
|
|
/* Create a subtree for this block, dont know the length yet*/
|
|
proto_item *block = proto_tree_add_text(tree, tvb, offset, -1, "Block %u", block_num);
|
|
proto_tree *xr_block_tree = proto_item_add_subtree(block, ett_xr_block);
|
|
proto_item *contents = NULL;
|
|
proto_item *content_tree = NULL;
|
|
|
|
proto_tree_add_item(xr_block_tree, hf_rtcp_xr_block_type, tvb, offset, 1, FALSE);
|
|
|
|
if (packet_len >= 2) {
|
|
parse_xr_type_specific_field(tvb, offset + 1, block_type, xr_block_tree);
|
|
if (packet_len >= 4) {
|
|
block_length = tvb_get_ntohs(tvb, offset + 2);
|
|
valid = validate_xr_block_length(tvb, offset + 2, block_type, block_length, xr_block_tree);
|
|
}
|
|
} else {
|
|
proto_tree_add_text(xr_block_tree, tvb, offset + 1, packet_len, "Missing Required Block Headers");
|
|
return offset + packet_len;
|
|
}
|
|
|
|
content_length = block_length * 4;
|
|
proto_item_set_len(block, content_length + 4);
|
|
|
|
if (content_length > packet_len) {
|
|
proto_tree_add_text(xr_block_tree, tvb, offset + 2, 2, "Block length is greater than packet length");
|
|
}
|
|
|
|
offset += 4;
|
|
packet_len -= 4;
|
|
|
|
contents = proto_tree_add_text(xr_block_tree, tvb, offset, content_length, "Contents");
|
|
content_tree = proto_item_add_subtree(contents, ett_xr_block_contents);
|
|
|
|
switch (block_type) {
|
|
case RTCP_XR_VOIP_METRCS: {
|
|
guint fraction_rate, value;
|
|
|
|
/* Identifier */
|
|
proto_tree_add_item(content_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Loss Rate */
|
|
fraction_rate = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint_format(content_tree, hf_rtcp_ssrc_fraction, tvb, offset, 1,
|
|
fraction_rate, "Fraction lost: %u / 256", fraction_rate);
|
|
offset++;
|
|
|
|
/* Discard Rate */
|
|
fraction_rate = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint_format(content_tree, hf_rtcp_ssrc_discarded, tvb, offset, 1,
|
|
fraction_rate, "Fraction Discarded: %u / 256", fraction_rate);
|
|
offset++;
|
|
|
|
/* Burst Density */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_burst_density, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* Gap Density */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_gap_density, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* Burst Duration */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_burst_duration, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* Gap Duration */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_gap_duration, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* Round Trip Delay */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_rtdelay, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* End System Delay */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_esdelay, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* Signal Level */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_siglevel, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* Noise Level */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_noiselevel, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* RERL */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_rerl, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* GMin */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_gmin, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* R factor */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_rfactor, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* external R Factor */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_extrfactor, tvb, offset, 1, FALSE);
|
|
offset++;
|
|
|
|
/* MOS LQ */
|
|
proto_tree_add_float(content_tree, hf_rtcp_xr_voip_metrics_moslq, tvb, offset, 1,
|
|
(float) (tvb_get_guint8(tvb, offset) / 10.0));
|
|
offset++;
|
|
|
|
/* MOS CQ */
|
|
proto_tree_add_float(content_tree, hf_rtcp_xr_voip_metrics_moscq, tvb, offset, 1,
|
|
(float) (tvb_get_guint8(tvb, offset) / 10.0));
|
|
offset++;
|
|
|
|
/* PLC, JB Adaptive, JB Rate */
|
|
value = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_voip_metrics_plc, tvb, offset, 1, value);
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_voip_metrics_jbadaptive, tvb, offset, 1, value);
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_voip_metrics_jbrate, tvb, offset, 1, value);
|
|
offset += 2; /* skip over reseved bit */
|
|
|
|
/* JB Nominal */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_jbnominal, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* JB Max */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_jbmax, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* JB Abs max */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_voip_metrics_jbabsmax, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
break;
|
|
}
|
|
|
|
case RTCP_XR_STATS_SUMRY: {
|
|
/* Identifier */
|
|
proto_tree_add_item(content_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Begin Seq */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_beginseq, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* End Seq */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_endseq, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* Lost Pkts */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_lost, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Dup Pkts */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_dups, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Min Jitter */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_minjitter, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Max Jitter */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_maxjitter, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Mean Jitter */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_meanjitter, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Dev Jitter */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_devjitter, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Min TTL */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_minttl, tvb, offset, 1, FALSE);
|
|
offset ++;
|
|
|
|
/* Max TTL */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_maxttl, tvb, offset, 1, FALSE);
|
|
offset ++;
|
|
|
|
/* Mean TTL */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_meanttl, tvb, offset, 1, FALSE);
|
|
offset ++;
|
|
|
|
/* Dev TTL */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_stats_devttl, tvb, offset, 1, FALSE);
|
|
offset ++;
|
|
|
|
break;
|
|
}
|
|
|
|
case RTCP_XR_REF_TIME: {
|
|
guint32 ts_msw, ts_lsw;
|
|
|
|
ts_msw = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(content_tree, tvb, offset, 4, "Timestamp, MSW: %u", ts_msw);
|
|
offset += 4;
|
|
ts_lsw = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_text(content_tree, tvb, offset, 4, "Timestamp, LSW: %u", ts_lsw);
|
|
offset += 4;
|
|
|
|
break;
|
|
}
|
|
|
|
case RTCP_XR_DLRR: {
|
|
/* Each report block is 12 bytes */
|
|
gint sources = content_length / 12;
|
|
gint counter = 0;
|
|
for(counter = 0; counter < sources; counter++) {
|
|
/* Create a new subtree for a length of 12 bytes */
|
|
proto_tree *ti = proto_tree_add_text(content_tree, tvb, offset, 12, "Source %u", counter + 1);
|
|
proto_tree *ssrc_tree = proto_item_add_subtree(ti, ett_xr_ssrc);
|
|
|
|
/* SSRC_n source identifier, 32 bits */
|
|
proto_tree_add_item(ssrc_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Last RR timestamp */
|
|
proto_tree_add_item(ssrc_tree, hf_rtcp_xr_lrr, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Delay since last RR timestamp */
|
|
proto_tree_add_item(ssrc_tree, hf_rtcp_xr_dlrr, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
}
|
|
|
|
if (content_length % 12 != 0)
|
|
offset += content_length % 12;
|
|
break;
|
|
}
|
|
|
|
case RTCP_XR_PKT_RXTIMES: {
|
|
/* 8 bytes of fixed header */
|
|
gint count = 0, skip = 8;
|
|
guint16 begin = 0;
|
|
|
|
/* Identifier */
|
|
proto_tree_add_item(content_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Begin Seq */
|
|
begin = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_beginseq, tvb, offset, 2, begin);
|
|
offset += 2;
|
|
|
|
/* End Seq */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_endseq, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
for(count = 0; skip < content_length; skip += 4, count++) {
|
|
proto_tree_add_text(content_tree, tvb, offset, 4, "Seq: %u, Timestamp: %u",
|
|
(begin + count) % 65536, FALSE);
|
|
offset += 4;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case RTCP_XR_LOSS_RLE:
|
|
case RTCP_XR_DUP_RLE: {
|
|
/* 8 bytes of fixed header */
|
|
gint count = 0, skip = 8;
|
|
guint16 begin = 0;
|
|
proto_item *chunks_item;
|
|
proto_tree *chunks_tree;
|
|
|
|
/* Identifier */
|
|
proto_tree_add_item(content_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
/* Begin Seq */
|
|
begin = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_beginseq, tvb, offset, 2, begin);
|
|
offset += 2;
|
|
|
|
/* End Seq */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_endseq, tvb, offset, 2, FALSE);
|
|
offset += 2;
|
|
|
|
/* report Chunks */
|
|
chunks_item = proto_tree_add_text(content_tree, tvb, offset, content_length,"Report Chunks");
|
|
chunks_tree = proto_item_add_subtree(chunks_item, ett_xr_loss_chunk);
|
|
|
|
for(count = 1; skip < content_length; skip += 2, count++) {
|
|
guint value = tvb_get_ntohs(tvb, offset);
|
|
|
|
if (value == 0) {
|
|
proto_tree_add_text(chunks_tree, tvb, offset, 2,
|
|
"Chunk: %u -- Null Terminator ",
|
|
count);
|
|
} else if ( ! ( value & 0x8000 )) {
|
|
const gchar* run_type = (value & 0x4000) ? "1s" : "0s";
|
|
value &= 0x3FFF;
|
|
proto_tree_add_text(chunks_tree, tvb, offset, 2,
|
|
"Chunk: %u -- Length Run %s, length: %u",
|
|
count, run_type, value);
|
|
} else {
|
|
char bits[20+1];
|
|
other_decode_bitfield_value(bits, value, 0x00007FFF, 16);
|
|
proto_tree_add_text(chunks_tree, tvb, offset, 2,
|
|
"Chunk: %u -- Bit Vector, bits: %s",
|
|
count, bits );
|
|
}
|
|
offset += 2;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case RTCP_XR_BT_XNQ: { /* BT XNQ block as defined in RFC5093 */
|
|
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_begseq, tvb, offset, 2, FALSE); /* Begin Sequence number */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_endseq, tvb, offset+2, 2, FALSE); /* End Sequence number */
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_vmaxdiff, tvb, offset, 2, FALSE); /* vmaxdiff */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_vrange, tvb, offset+2, 2, FALSE); /* vrange */
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_vsum, tvb, offset, 4, FALSE); /* vsum */
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_cycles, tvb, offset, 2, FALSE); /* cycle count */
|
|
proto_tree_add_item(content_tree, hf_rtcp_xr_btxnq_jbevents, tvb, offset+2, 2, FALSE); /* jitter buffer events */
|
|
offset += 4;
|
|
|
|
temp_value = tvb_get_ntohl(tvb, offset); /* tDegNet */
|
|
if( (temp_value & 0x0ff000000) != 0)
|
|
proto_tree_add_string(content_tree, hf_rtcp_xr_btxnq_spare, tvb, offset, 1, "Warning - spare bits not 0");
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_btxnq_tdegnet, tvb, offset+1, 3, temp_value & 0x0ffffff);
|
|
offset += 4;
|
|
|
|
temp_value = tvb_get_ntohl(tvb, offset); /* tDegJit */
|
|
if( (temp_value & 0x0ff000000) != 0)
|
|
proto_tree_add_string(content_tree, hf_rtcp_xr_btxnq_spare, tvb, offset, 1, "Warning - spare bits not 0");
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_btxnq_tdegjit, tvb, offset+1, 3, temp_value & 0x0ffffff);
|
|
offset += 4;
|
|
|
|
temp_value = tvb_get_ntohl(tvb, offset); /* ES */
|
|
if( (temp_value & 0x0ff000000) != 0)
|
|
proto_tree_add_string(content_tree, hf_rtcp_xr_btxnq_spare, tvb, offset, 1, "Warning - spare bits not 0");
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_btxnq_es, tvb, offset+1, 3, temp_value & 0x0ffffff);
|
|
offset += 4;
|
|
|
|
temp_value = tvb_get_ntohl(tvb, offset); /* SES */
|
|
if( (temp_value & 0x0ff000000) != 0)
|
|
proto_tree_add_string(content_tree, hf_rtcp_xr_btxnq_spare, tvb, offset, 1, "Warning - spare bits not 0");
|
|
proto_tree_add_uint(content_tree, hf_rtcp_xr_btxnq_ses, tvb, offset+1, 3, temp_value & 0x0ffffff);
|
|
offset += 4;
|
|
|
|
break;
|
|
}
|
|
default:
|
|
/* skip over the unknown block */
|
|
offset += content_length;
|
|
break;
|
|
}
|
|
packet_len -= content_length;
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_rr( packet_info *pinfo, tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
unsigned int count, unsigned int packet_length )
|
|
{
|
|
unsigned int counter = 1;
|
|
proto_tree *ssrc_tree = (proto_tree*) NULL;
|
|
proto_tree *ssrc_sub_tree = (proto_tree*) NULL;
|
|
proto_tree *high_sec_tree = (proto_tree*) NULL;
|
|
proto_item *ti = (proto_item*) NULL;
|
|
guint8 rr_flt;
|
|
unsigned int cum_nr = 0;
|
|
int rr_offset = offset;
|
|
|
|
while ( counter <= count ) {
|
|
guint32 lsr, dlsr;
|
|
|
|
/* Create a new subtree for a length of 24 bytes */
|
|
ti = proto_tree_add_text(tree, tvb, offset, 24,
|
|
"Source %u", counter );
|
|
ssrc_tree = proto_item_add_subtree( ti, ett_ssrc );
|
|
|
|
/* SSRC_n source identifier, 32 bits */
|
|
proto_tree_add_item( ssrc_tree, hf_rtcp_ssrc_source, tvb, offset, 4, FALSE );
|
|
offset += 4;
|
|
|
|
ti = proto_tree_add_text(ssrc_tree, tvb, offset, 20, "SSRC contents" );
|
|
ssrc_sub_tree = proto_item_add_subtree( ti, ett_ssrc_item );
|
|
|
|
/* Fraction lost, 8bits */
|
|
rr_flt = tvb_get_guint8( tvb, offset );
|
|
proto_tree_add_uint_format( ssrc_sub_tree, hf_rtcp_ssrc_fraction, tvb,
|
|
offset, 1, rr_flt, "Fraction lost: %u / 256", rr_flt );
|
|
offset++;
|
|
|
|
/* Cumulative number of packets lost, 24 bits */
|
|
cum_nr = tvb_get_ntohl( tvb, offset ) >> 8;
|
|
proto_tree_add_uint( ssrc_sub_tree, hf_rtcp_ssrc_cum_nr, tvb,
|
|
offset, 3, cum_nr );
|
|
offset += 3;
|
|
|
|
/* Extended highest sequence nr received, 32 bits
|
|
* Just for the sake of it, let's add another subtree
|
|
* because this might be a little clearer
|
|
*/
|
|
ti = proto_tree_add_uint( ssrc_tree, hf_rtcp_ssrc_ext_high_seq,
|
|
tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
high_sec_tree = proto_item_add_subtree( ti, ett_ssrc_ext_high );
|
|
/* Sequence number cycles */
|
|
proto_tree_add_item( high_sec_tree, hf_rtcp_ssrc_high_cycles,
|
|
tvb, offset, 2, FALSE );
|
|
offset += 2;
|
|
/* highest sequence number received */
|
|
proto_tree_add_item( high_sec_tree, hf_rtcp_ssrc_high_seq,
|
|
tvb, offset, 2, FALSE );
|
|
offset += 2;
|
|
|
|
/* Interarrival jitter */
|
|
proto_tree_add_item( ssrc_tree, hf_rtcp_ssrc_jitter, tvb,
|
|
offset, 4, FALSE );
|
|
offset += 4;
|
|
|
|
/* Last SR timestamp */
|
|
lsr = tvb_get_ntohl( tvb, offset );
|
|
proto_tree_add_uint( ssrc_tree, hf_rtcp_ssrc_lsr, tvb,
|
|
offset, 4, lsr );
|
|
offset += 4;
|
|
|
|
/* Delay since last SR timestamp */
|
|
dlsr = tvb_get_ntohl( tvb, offset );
|
|
ti = proto_tree_add_uint( ssrc_tree, hf_rtcp_ssrc_dlsr, tvb,
|
|
offset, 4, dlsr );
|
|
proto_item_append_text(ti, " (%d milliseconds)",
|
|
(int)(((double)dlsr/(double)65536) * 1000.0));
|
|
offset += 4;
|
|
|
|
/* Do roundtrip calculation */
|
|
if (global_rtcp_show_roundtrip_calculation)
|
|
{
|
|
/* Based on delay since SR was sent in other direction */
|
|
calculate_roundtrip_delay(tvb, pinfo, ssrc_tree, lsr, dlsr);
|
|
}
|
|
|
|
counter++;
|
|
}
|
|
|
|
/* If length remaining, assume profile-specific extension bytes */
|
|
if ((offset-rr_offset) < (int)packet_length)
|
|
{
|
|
proto_tree_add_item(tree, hf_rtcp_profile_specific_extension, tvb, offset,
|
|
packet_length - (offset - rr_offset), FALSE);
|
|
offset = rr_offset + packet_length;
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
static int
|
|
dissect_rtcp_sr( packet_info *pinfo, tvbuff_t *tvb, int offset, proto_tree *tree,
|
|
unsigned int count, unsigned int packet_length )
|
|
{
|
|
proto_item* item;
|
|
guint32 ts_msw, ts_lsw;
|
|
gchar *buff;
|
|
int sr_offset = offset;
|
|
|
|
/* NTP timestamp */
|
|
ts_msw = tvb_get_ntohl(tvb, offset);
|
|
proto_tree_add_item(tree, hf_rtcp_ntp_msw, tvb, offset, 4, FALSE);
|
|
|
|
ts_lsw = tvb_get_ntohl(tvb, offset+4);
|
|
proto_tree_add_item(tree, hf_rtcp_ntp_lsw, tvb, offset+4, 4, FALSE);
|
|
|
|
buff=ntp_fmt_ts(tvb_get_ptr( tvb, offset, 8 ));
|
|
item = proto_tree_add_string_format( tree, hf_rtcp_ntp, tvb, offset, 8, ( const char* ) buff, "MSW and LSW as NTP timestamp: %s", buff );
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
offset += 8;
|
|
|
|
/* RTP timestamp, 32 bits */
|
|
proto_tree_add_uint( tree, hf_rtcp_rtp_timestamp, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
/* Sender's packet count, 32 bits */
|
|
proto_tree_add_uint( tree, hf_rtcp_sender_pkt_cnt, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
/* Sender's octet count, 32 bits */
|
|
proto_tree_add_uint( tree, hf_rtcp_sender_oct_cnt, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
/* Record the time of this packet in the sender's conversation */
|
|
if (global_rtcp_show_roundtrip_calculation)
|
|
{
|
|
/* Use middle 32 bits of 64-bit time value */
|
|
guint32 lsr = ((ts_msw & 0x0000ffff) << 16 | (ts_lsw & 0xffff0000) >> 16);
|
|
|
|
/* Record the time that we sent this in appropriate conversation */
|
|
remember_outgoing_sr(pinfo, lsr);
|
|
}
|
|
|
|
/* The rest of the packet is equal to the RR packet */
|
|
if ( count != 0 )
|
|
offset = dissect_rtcp_rr( pinfo, tvb, offset, tree, count, packet_length-(offset-sr_offset) );
|
|
else
|
|
{
|
|
/* If length remaining, assume profile-specific extension bytes */
|
|
if ((offset-sr_offset) < (int)packet_length)
|
|
{
|
|
proto_tree_add_item(tree, hf_rtcp_profile_specific_extension, tvb, offset,
|
|
packet_length - (offset - sr_offset), FALSE);
|
|
offset = sr_offset + packet_length;
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Look for conversation info and display any setup info found */
|
|
void show_setup_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* Conversation and current data */
|
|
conversation_t *p_conv = NULL;
|
|
struct _rtcp_conversation_info *p_conv_data = NULL;
|
|
|
|
/* Use existing packet data if available */
|
|
p_conv_data = p_get_proto_data(pinfo->fd, proto_rtcp);
|
|
|
|
if (!p_conv_data)
|
|
{
|
|
/* First time, get info from conversation */
|
|
p_conv = find_conversation(pinfo->fd->num, &pinfo->net_dst, &pinfo->net_src,
|
|
pinfo->ptype,
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
if (p_conv)
|
|
{
|
|
/* Look for data in conversation */
|
|
struct _rtcp_conversation_info *p_conv_packet_data;
|
|
p_conv_data = conversation_get_proto_data(p_conv, proto_rtcp);
|
|
|
|
if (p_conv_data)
|
|
{
|
|
/* Save this conversation info into packet info */
|
|
p_conv_packet_data = se_alloc(sizeof(struct _rtcp_conversation_info));
|
|
if (!p_conv_packet_data)
|
|
{
|
|
return;
|
|
}
|
|
memcpy(p_conv_packet_data, p_conv_data,
|
|
sizeof(struct _rtcp_conversation_info));
|
|
|
|
p_add_proto_data(pinfo->fd, proto_rtcp, p_conv_packet_data);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Create setup info subtree with summary info. */
|
|
if (p_conv_data && p_conv_data->setup_method_set)
|
|
{
|
|
proto_tree *rtcp_setup_tree;
|
|
proto_item *ti = proto_tree_add_string_format(tree, hf_rtcp_setup, tvb, 0, 0,
|
|
"",
|
|
"Stream setup by %s (frame %u)",
|
|
p_conv_data->setup_method,
|
|
p_conv_data->setup_frame_number);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
rtcp_setup_tree = proto_item_add_subtree(ti, ett_rtcp_setup);
|
|
if (rtcp_setup_tree)
|
|
{
|
|
/* Add details into subtree */
|
|
proto_item* item = proto_tree_add_uint(rtcp_setup_tree, hf_rtcp_setup_frame,
|
|
tvb, 0, 0, p_conv_data->setup_frame_number);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
item = proto_tree_add_string(rtcp_setup_tree, hf_rtcp_setup_method,
|
|
tvb, 0, 0, p_conv_data->setup_method);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Update conversation data to record time that outgoing rr/sr was sent */
|
|
static void remember_outgoing_sr(packet_info *pinfo, long lsr)
|
|
{
|
|
conversation_t *p_conv = NULL;
|
|
struct _rtcp_conversation_info *p_conv_data = NULL;
|
|
struct _rtcp_conversation_info *p_packet_data = NULL;
|
|
|
|
/* This information will be accessed when an incoming packet comes back to
|
|
the side that sent this packet, so no use storing in the packet
|
|
info. However, do store the fact that we've already set this info
|
|
before */
|
|
|
|
|
|
/**************************************************************************/
|
|
/* First of all, see if we've already stored this information for this sr */
|
|
|
|
/* Look first in packet info */
|
|
p_packet_data = p_get_proto_data(pinfo->fd, proto_rtcp);
|
|
if (p_packet_data && p_packet_data->last_received_set &&
|
|
p_packet_data->last_received_frame_number >= pinfo->fd->num)
|
|
{
|
|
/* We already did this, OK */
|
|
return;
|
|
}
|
|
|
|
|
|
/**************************************************************************/
|
|
/* Otherwise, we want to find/create the conversation and update it */
|
|
|
|
/* First time, get info from conversation.
|
|
Even though we think of this as an outgoing packet being sent,
|
|
we store the time as being received by the destination. */
|
|
p_conv = find_conversation(pinfo->fd->num, &pinfo->net_dst, &pinfo->net_src,
|
|
pinfo->ptype,
|
|
pinfo->destport, pinfo->srcport, NO_ADDR_B);
|
|
|
|
/* If the conversation doesn't exist, create it now. */
|
|
if (!p_conv)
|
|
{
|
|
p_conv = conversation_new(pinfo->fd->num, &pinfo->net_dst, &pinfo->net_src, PT_UDP,
|
|
pinfo->destport, pinfo->srcport,
|
|
NO_ADDR2);
|
|
if (!p_conv)
|
|
{
|
|
/* Give up if can't create it */
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
/****************************************************/
|
|
/* Now find/create conversation data */
|
|
p_conv_data = conversation_get_proto_data(p_conv, proto_rtcp);
|
|
if (!p_conv_data)
|
|
{
|
|
/* Allocate memory for data */
|
|
p_conv_data = se_alloc(sizeof(struct _rtcp_conversation_info));
|
|
if (!p_conv_data)
|
|
{
|
|
/* Give up if couldn't allocate space for memory */
|
|
return;
|
|
}
|
|
memset(p_conv_data, 0, sizeof(struct _rtcp_conversation_info));
|
|
|
|
/* Add it to conversation. */
|
|
conversation_add_proto_data(p_conv, proto_rtcp, p_conv_data);
|
|
}
|
|
|
|
/*******************************************************/
|
|
/* Update conversation data */
|
|
p_conv_data->last_received_set = TRUE;
|
|
p_conv_data->last_received_frame_number = pinfo->fd->num;
|
|
p_conv_data->last_received_timestamp = pinfo->fd->abs_ts;
|
|
p_conv_data->last_received_ts = lsr;
|
|
|
|
|
|
/****************************************************************/
|
|
/* Update packet info to record conversation state */
|
|
|
|
/* Will use/create packet info */
|
|
if (!p_packet_data)
|
|
{
|
|
p_packet_data = se_alloc(sizeof(struct _rtcp_conversation_info));
|
|
if (!p_packet_data)
|
|
{
|
|
/* Give up if allocation fails */
|
|
return;
|
|
}
|
|
memset(p_packet_data, 0, sizeof(struct _rtcp_conversation_info));
|
|
|
|
p_add_proto_data(pinfo->fd, proto_rtcp, p_packet_data);
|
|
}
|
|
|
|
/* Copy current conversation data into packet info */
|
|
p_packet_data->last_received_set = TRUE;
|
|
p_packet_data->last_received_frame_number = p_conv_data->last_received_frame_number;
|
|
}
|
|
|
|
|
|
/* Use received sr to work out what the roundtrip delay is
|
|
(at least between capture point and the other endpoint involved in
|
|
the conversation) */
|
|
static void calculate_roundtrip_delay(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree, guint32 lsr, guint32 dlsr)
|
|
{
|
|
/*****************************************************/
|
|
/* This is called dissecting an SR. We need to:
|
|
- look in the packet info for stored calculation. If found, use.
|
|
- look up the conversation of the sending side to see when the
|
|
'last SR' was detected (received)
|
|
- calculate the network delay using the that packet time,
|
|
this packet time, and dlsr
|
|
*****************************************************/
|
|
|
|
conversation_t *p_conv = NULL;
|
|
struct _rtcp_conversation_info *p_conv_data = NULL;
|
|
struct _rtcp_conversation_info *p_packet_data = NULL;
|
|
|
|
|
|
/*************************************************/
|
|
/* Look for previous result */
|
|
p_packet_data = p_get_proto_data(pinfo->fd, proto_rtcp);
|
|
if (p_packet_data && p_packet_data->lsr_matched)
|
|
{
|
|
/* Show info. */
|
|
add_roundtrip_delay_info(tvb, pinfo, tree,
|
|
p_packet_data->calculated_delay_used_frame,
|
|
p_packet_data->calculated_delay_report_gap,
|
|
p_packet_data->calculated_delay);
|
|
return;
|
|
}
|
|
|
|
|
|
/********************************************************************/
|
|
/* Look for captured timestamp of last SR in conversation of sender */
|
|
/* of this packet */
|
|
p_conv = find_conversation(pinfo->fd->num, &pinfo->net_src, &pinfo->net_dst,
|
|
pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, NO_ADDR_B);
|
|
if (!p_conv)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* Look for conversation data */
|
|
p_conv_data = conversation_get_proto_data(p_conv, proto_rtcp);
|
|
if (!p_conv_data)
|
|
{
|
|
return;
|
|
}
|
|
|
|
if (p_conv_data->last_received_set)
|
|
{
|
|
/* Store result of calculation in packet info */
|
|
if (!p_packet_data)
|
|
{
|
|
/* Create packet info if it doesn't exist */
|
|
p_packet_data = se_alloc(sizeof(struct _rtcp_conversation_info));
|
|
if (!p_packet_data)
|
|
{
|
|
/* Give up if allocation fails */
|
|
return;
|
|
}
|
|
|
|
memset(p_packet_data, 0, sizeof(struct _rtcp_conversation_info));
|
|
|
|
/* Set as packet info */
|
|
p_add_proto_data(pinfo->fd, proto_rtcp, p_packet_data);
|
|
}
|
|
|
|
/* Don't allow match seemingly calculated from same (or later!) frame */
|
|
if (pinfo->fd->num <= p_conv_data->last_received_frame_number)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* The previous report must match the lsr given here */
|
|
if (p_conv_data->last_received_ts == lsr)
|
|
{
|
|
/* Look at time of since original packet was sent */
|
|
gint seconds_between_packets = (gint)
|
|
(pinfo->fd->abs_ts.secs - p_conv_data->last_received_timestamp.secs);
|
|
gint nseconds_between_packets =
|
|
pinfo->fd->abs_ts.nsecs - p_conv_data->last_received_timestamp.nsecs;
|
|
|
|
gint total_gap = (seconds_between_packets*1000) +
|
|
(nseconds_between_packets / 1000000);
|
|
gint dlsr_ms = (int)(((double)dlsr/(double)65536) * 1000.0);
|
|
gint delay;
|
|
|
|
/* Delay is gap - dlsr (N.B. this is allowed to be -ve) */
|
|
delay = total_gap - dlsr_ms;
|
|
|
|
/* Record that the LSR matches */
|
|
p_packet_data->lsr_matched = TRUE;
|
|
|
|
/* No useful calculation can be done if dlsr not set... */
|
|
if (dlsr)
|
|
{
|
|
p_packet_data->calculated_delay = delay;
|
|
p_packet_data->calculated_delay_report_gap = total_gap;
|
|
p_packet_data->calculated_delay_used_frame = p_conv_data->last_received_frame_number;
|
|
}
|
|
|
|
/* Show info. */
|
|
add_roundtrip_delay_info(tvb, pinfo, tree,
|
|
p_conv_data->last_received_frame_number,
|
|
total_gap,
|
|
delay);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Show the calcaulted roundtrip delay info by adding protocol tree items
|
|
and appending text to the info column */
|
|
static void add_roundtrip_delay_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
guint frame, guint gap_between_reports,
|
|
gint delay)
|
|
{
|
|
/* 'Last SR' frame used in calculation. Show this even if no delay shown */
|
|
proto_item* item = proto_tree_add_uint(tree,
|
|
hf_rtcp_last_sr_timestamp_frame,
|
|
tvb, 0, 0, frame);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
/* Time elapsed since 'Last SR' time in capture */
|
|
item = proto_tree_add_uint(tree,
|
|
hf_rtcp_time_since_last_sr,
|
|
tvb, 0, 0, gap_between_reports);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
/* Don't report on calculated delays below the threshold.
|
|
Will report delays less than -threshold, to highlight
|
|
problems with generated reports */
|
|
if (abs(delay) < (int)global_rtcp_show_roundtrip_calculation_minimum)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* Calculated delay in ms */
|
|
item = proto_tree_add_int(tree, hf_rtcp_roundtrip_delay, tvb, 0, 0, delay);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
|
|
/* Add to expert info */
|
|
if (delay >= 0)
|
|
{
|
|
expert_add_info_format(pinfo, item,
|
|
PI_SEQUENCE, PI_NOTE,
|
|
"RTCP round-trip delay detected (%d ms)",
|
|
delay);
|
|
}
|
|
else
|
|
{
|
|
expert_add_info_format(pinfo, item,
|
|
PI_SEQUENCE, PI_ERROR,
|
|
"Negative RTCP round-trip delay detected (%d ms)",
|
|
delay);
|
|
}
|
|
|
|
/* Report delay in INFO column */
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" (roundtrip delay <-> %s = %dms, using frame %u) ",
|
|
address_to_str(&pinfo->net_src), delay, frame);
|
|
}
|
|
}
|
|
|
|
static int
|
|
rtcp_packet_type_to_tree( int rtcp_packet_type)
|
|
{
|
|
int tree = ett_rtcp;
|
|
|
|
switch(rtcp_packet_type) {
|
|
case RTCP_SR: tree = ett_rtcp_sr; break;
|
|
case RTCP_RR: tree = ett_rtcp_rr; break;
|
|
case RTCP_SDES: tree = ett_rtcp_sdes; break;
|
|
case RTCP_BYE: tree = ett_rtcp_bye; break;
|
|
case RTCP_APP: tree = ett_rtcp_app; break;
|
|
case RTCP_RTPFB: tree = ett_rtcp_rtpfb; break;
|
|
case RTCP_PSFB: tree = ett_rtcp_psfb; break;
|
|
case RTCP_XR: tree = ett_rtcp_xr; break;
|
|
case RTCP_FIR: tree = ett_rtcp_fir; break;
|
|
case RTCP_NACK: tree = ett_rtcp_nack; break;
|
|
default: tree = ett_rtcp;
|
|
}
|
|
return tree;
|
|
}
|
|
|
|
static void
|
|
dissect_rtcp( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_tree *rtcp_tree = NULL;
|
|
unsigned int temp_byte = 0;
|
|
unsigned int padding_set = 0;
|
|
unsigned int elem_count = 0;
|
|
unsigned int packet_type = 0;
|
|
unsigned int offset = 0;
|
|
guint16 packet_length = 0;
|
|
guint16 total_packet_length = 0;
|
|
guint rtcp_subtype = 0;
|
|
guint32 app_length = 0;
|
|
gboolean srtcp_encrypted = FALSE;
|
|
gboolean srtcp_now_encrypted = FALSE;
|
|
conversation_t *p_conv = NULL;
|
|
struct _rtcp_conversation_info *p_conv_data = NULL;
|
|
struct srtp_info *srtcp_info = NULL;
|
|
gboolean e_bit;
|
|
guint32 srtcp_offset = 0;
|
|
guint32 srtcp_index = 0;
|
|
|
|
if ( check_col( pinfo->cinfo, COL_PROTOCOL ) ) {
|
|
col_set_str( pinfo->cinfo, COL_PROTOCOL, "RTCP" );
|
|
}
|
|
|
|
/* first see if this conversation is encrypted SRTP, and if so do not try to dissect the payload(s) */
|
|
p_conv = find_conversation(pinfo->fd->num, &pinfo->net_src, &pinfo->net_dst,
|
|
pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, NO_ADDR_B);
|
|
if (p_conv)
|
|
{
|
|
p_conv_data = conversation_get_proto_data(p_conv, proto_rtcp);
|
|
if (p_conv_data && p_conv_data->srtcp_info)
|
|
{
|
|
srtcp_info = p_conv_data->srtcp_info;
|
|
/* get the offset to the start of the SRTCP fields at the end of the packet */
|
|
srtcp_offset = tvb_length_remaining(tvb,offset) - srtcp_info->auth_tag_len - srtcp_info->mki_len - 4;
|
|
/* It has been setup as SRTCP, but skip to the SRTCP E field at the end
|
|
to see if this particular packet is encrypted or not. The E bit is the MSB. */
|
|
srtcp_index = tvb_get_ntohl(tvb,srtcp_offset);
|
|
e_bit = (srtcp_index & 0x80000000) ? TRUE : FALSE;
|
|
srtcp_index &= 0x7fffffff;
|
|
|
|
if (srtcp_info->encryption_algorithm!=SRTP_ENC_ALG_NULL) {
|
|
/* just flag it for now - the first SR or RR header and SSRC are unencrypted */
|
|
if (e_bit)
|
|
srtcp_encrypted = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check if there are at least 4 bytes left in the frame,
|
|
* the last 16 bits of those is the length of the current
|
|
* RTCP message. The last compound message contains padding,
|
|
* that enables us to break from the while loop.
|
|
*/
|
|
while ( !srtcp_now_encrypted && tvb_bytes_exist( tvb, offset, 4) ) {
|
|
/*
|
|
* First retreive the packet_type
|
|
*/
|
|
packet_type = tvb_get_guint8( tvb, offset + 1 );
|
|
|
|
/*
|
|
* Check if it's a valid type
|
|
*/
|
|
if ( ( packet_type < 192 ) || ( packet_type > 207 ) )
|
|
break;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
{
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
|
|
val_to_str(packet_type, rtcp_packet_type_vals, "Unknown"));
|
|
}
|
|
|
|
/*
|
|
* get the packet-length for the complete RTCP packet
|
|
*/
|
|
packet_length = ( tvb_get_ntohs( tvb, offset + 2 ) + 1 ) * 4;
|
|
total_packet_length += packet_length;
|
|
|
|
ti = proto_tree_add_item(tree, proto_rtcp, tvb, offset, packet_length, FALSE );
|
|
proto_item_append_text(ti, " (%s)",
|
|
val_to_str(packet_type,
|
|
rtcp_packet_type_vals,
|
|
"Unknown"));
|
|
|
|
rtcp_tree = proto_item_add_subtree( ti, rtcp_packet_type_to_tree(packet_type) );
|
|
|
|
/* Conversation setup info */
|
|
if (global_rtcp_show_setup_info)
|
|
{
|
|
show_setup_info(tvb, pinfo, rtcp_tree);
|
|
}
|
|
|
|
|
|
temp_byte = tvb_get_guint8( tvb, offset );
|
|
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_version, tvb,
|
|
offset, 1, temp_byte);
|
|
padding_set = RTCP_PADDING( temp_byte );
|
|
|
|
proto_tree_add_boolean( rtcp_tree, hf_rtcp_padding, tvb,
|
|
offset, 1, temp_byte );
|
|
elem_count = RTCP_COUNT( temp_byte );
|
|
|
|
switch ( packet_type ) {
|
|
case RTCP_SR:
|
|
case RTCP_RR:
|
|
/* Receiver report count, 5 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_rc, tvb, offset, 1, temp_byte );
|
|
offset++;
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
/* Sender Synchronization source, 32 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_ssrc_sender, tvb, offset, 4, tvb_get_ntohl( tvb, offset ) );
|
|
offset += 4;
|
|
|
|
if (srtcp_encrypted) { /* rest of the payload is encrypted - do not try to dissect */
|
|
srtcp_now_encrypted = TRUE;
|
|
break;
|
|
}
|
|
|
|
if ( packet_type == RTCP_SR )
|
|
offset = dissect_rtcp_sr( pinfo, tvb, offset, rtcp_tree, elem_count, packet_length-8 );
|
|
else
|
|
offset = dissect_rtcp_rr( pinfo, tvb, offset, rtcp_tree, elem_count, packet_length-8 );
|
|
break;
|
|
case RTCP_SDES:
|
|
/* Source count, 5 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_sc, tvb, offset, 1, temp_byte );
|
|
offset++;
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
dissect_rtcp_sdes( tvb, offset, rtcp_tree, elem_count );
|
|
offset += packet_length - 4;
|
|
break;
|
|
case RTCP_BYE:
|
|
/* Source count, 5 bits */
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_sc, tvb, offset, 1, temp_byte );
|
|
offset++;
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
offset = dissect_rtcp_bye( tvb, pinfo, offset, rtcp_tree, elem_count );
|
|
break;
|
|
case RTCP_APP:
|
|
/* Subtype, 5 bits */
|
|
rtcp_subtype = elem_count;
|
|
proto_tree_add_uint( rtcp_tree, hf_rtcp_subtype, tvb, offset, 1, elem_count );
|
|
offset++;
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
app_length = tvb_get_ntohs( tvb, offset ) <<2;
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
offset = dissect_rtcp_app( tvb, pinfo, offset,rtcp_tree, padding_set, packet_length - 4, rtcp_subtype, app_length);
|
|
break;
|
|
case RTCP_XR:
|
|
/* Reserved, 5 bits, Ignore */
|
|
offset++;
|
|
/* Packet type, 8 bits */
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_pt, tvb, offset, 1, FALSE );
|
|
offset++;
|
|
/* Packet length in 32 bit words MINUS one, 16 bits */
|
|
offset = dissect_rtcp_length_field(rtcp_tree, tvb, offset);
|
|
offset = dissect_rtcp_xr( tvb, pinfo, offset, rtcp_tree, packet_length - 4 );
|
|
break;
|
|
case RTCP_FIR:
|
|
offset = dissect_rtcp_fir( tvb, offset, rtcp_tree );
|
|
break;
|
|
case RTCP_NACK:
|
|
offset = dissect_rtcp_nack( tvb, offset, rtcp_tree );
|
|
break;
|
|
case RTCP_RTPFB:
|
|
offset = dissect_rtcp_rtpfb( tvb, offset, rtcp_tree, ti );
|
|
break;
|
|
case RTCP_PSFB:
|
|
offset = dissect_rtcp_psfb( tvb, offset, rtcp_tree, packet_length );
|
|
break;
|
|
default:
|
|
/*
|
|
* To prevent endless loops in case of an unknown message type
|
|
* increase offset. Some time the while will end :-)
|
|
*/
|
|
offset++;
|
|
break;
|
|
}
|
|
|
|
col_set_fence(pinfo->cinfo, COL_INFO);
|
|
}
|
|
/* If the padding bit is set, the last octet of the
|
|
* packet contains the length of the padding
|
|
* We only have to check for this at the end of the LAST RTCP message
|
|
*/
|
|
if ( padding_set ) {
|
|
/* If everything went according to plan offset should now point to the
|
|
* first octet of the padding
|
|
*/
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_padding_data, tvb, offset, tvb_length_remaining( tvb, offset) - 1, FALSE );
|
|
offset += tvb_length_remaining( tvb, offset) - 1;
|
|
proto_tree_add_item( rtcp_tree, hf_rtcp_padding_count, tvb, offset, 1, FALSE );
|
|
}
|
|
|
|
/* If the payload was encrypted, the main payload was not dissected */
|
|
if (srtcp_encrypted == TRUE) {
|
|
proto_tree_add_text(rtcp_tree, tvb, offset, srtcp_offset-offset, "Encrypted RTCP Payload - not dissected");
|
|
proto_tree_add_item(rtcp_tree, hf_srtcp_e, tvb, srtcp_offset, 4, FALSE);
|
|
proto_tree_add_uint(rtcp_tree, hf_srtcp_index, tvb, srtcp_offset, 4, srtcp_index);
|
|
srtcp_offset += 4;
|
|
if (srtcp_info->mki_len) {
|
|
proto_tree_add_item(rtcp_tree, hf_srtcp_mki, tvb, srtcp_offset, srtcp_info->mki_len, FALSE);
|
|
srtcp_offset += srtcp_info->mki_len;
|
|
}
|
|
|
|
if (srtcp_info->auth_tag_len) {
|
|
proto_tree_add_item(rtcp_tree, hf_srtcp_auth_tag, tvb, srtcp_offset, srtcp_info->auth_tag_len, FALSE);
|
|
srtcp_offset += srtcp_info->auth_tag_len;
|
|
}
|
|
}
|
|
/* offset should be total_packet_length by now... */
|
|
else if (offset == (unsigned int)total_packet_length)
|
|
{
|
|
ti = proto_tree_add_boolean_format_value(tree, hf_rtcp_length_check, tvb,
|
|
0, 0, TRUE, "OK - %u bytes",
|
|
offset);
|
|
/* Hidden might be less annoying here...? */
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
else
|
|
{
|
|
ti = proto_tree_add_boolean_format_value(tree, hf_rtcp_length_check, tvb,
|
|
0, 0, FALSE,
|
|
"Wrong (expected %u bytes, found %d)",
|
|
total_packet_length, offset);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
expert_add_info_format(pinfo, ti,
|
|
PI_MALFORMED, PI_WARN,
|
|
"Incorrect RTCP packet length information (expected %u bytes, found %d)",
|
|
total_packet_length, offset);
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_rtcp(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{
|
|
{
|
|
&hf_rtcp_version,
|
|
{
|
|
"Version",
|
|
"rtcp.version",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_version_vals),
|
|
0xC0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_padding,
|
|
{
|
|
"Padding",
|
|
"rtcp.padding",
|
|
FT_BOOLEAN,
|
|
8,
|
|
NULL,
|
|
0x20,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_rc,
|
|
{
|
|
"Reception report count",
|
|
"rtcp.rc",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x1F,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sc,
|
|
{
|
|
"Source count",
|
|
"rtcp.sc",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x1F,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_pt,
|
|
{
|
|
"Packet type",
|
|
"rtcp.pt",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS( rtcp_packet_type_vals ),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_length,
|
|
{
|
|
"Length",
|
|
"rtcp.length",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"32-bit words (-1) in packet", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_sender,
|
|
{
|
|
"Sender SSRC",
|
|
"rtcp.senderssrc",
|
|
FT_UINT32,
|
|
BASE_HEX_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ntp_msw,
|
|
{
|
|
"Timestamp, MSW",
|
|
"rtcp.timestamp.ntp.msw",
|
|
FT_UINT32,
|
|
BASE_DEC_HEX,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ntp_lsw,
|
|
{
|
|
"Timestamp, LSW",
|
|
"rtcp.timestamp.ntp.lsw",
|
|
FT_UINT32,
|
|
BASE_DEC_HEX,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ntp,
|
|
{
|
|
"NTP timestamp",
|
|
"rtcp.timestamp.ntp",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_rtp_timestamp,
|
|
{
|
|
"RTP timestamp",
|
|
"rtcp.timestamp.rtp",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sender_pkt_cnt,
|
|
{
|
|
"Sender's packet count",
|
|
"rtcp.sender.packetcount",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sender_oct_cnt,
|
|
{
|
|
"Sender's octet count",
|
|
"rtcp.sender.octetcount",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_source,
|
|
{
|
|
"Identifier",
|
|
"rtcp.ssrc.identifier",
|
|
FT_UINT32,
|
|
BASE_HEX_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_fraction,
|
|
{
|
|
"Fraction lost",
|
|
"rtcp.ssrc.fraction",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_cum_nr,
|
|
{
|
|
"Cumulative number of packets lost",
|
|
"rtcp.ssrc.cum_nr",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_ext_high_seq,
|
|
{
|
|
"Extended highest sequence number received",
|
|
"rtcp.ssrc.ext_high",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_high_seq,
|
|
{
|
|
"Highest sequence number received",
|
|
"rtcp.ssrc.high_seq",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_high_cycles,
|
|
{
|
|
"Sequence number cycles count",
|
|
"rtcp.ssrc.high_cycles",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_jitter,
|
|
{
|
|
"Interarrival jitter",
|
|
"rtcp.ssrc.jitter",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_lsr,
|
|
{
|
|
"Last SR timestamp",
|
|
"rtcp.ssrc.lsr",
|
|
FT_UINT32,
|
|
BASE_DEC_HEX,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_dlsr,
|
|
{
|
|
"Delay since last SR timestamp",
|
|
"rtcp.ssrc.dlsr",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_csrc,
|
|
{
|
|
"SSRC / CSRC identifier",
|
|
"rtcp.sdes.ssrc_csrc",
|
|
FT_UINT32,
|
|
BASE_HEX_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sdes_type,
|
|
{
|
|
"Type",
|
|
"rtcp.sdes.type",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS( rtcp_sdes_type_vals ),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sdes_length,
|
|
{
|
|
"Length",
|
|
"rtcp.sdes.length",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sdes_text,
|
|
{
|
|
"Text",
|
|
"rtcp.sdes.text",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sdes_prefix_len,
|
|
{
|
|
"Prefix length",
|
|
"rtcp.sdes.prefix.length",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_sdes_prefix_string,
|
|
{
|
|
"Prefix string",
|
|
"rtcp.sdes.prefix.string",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_subtype,
|
|
{
|
|
"Subtype",
|
|
"rtcp.app.subtype",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_name_ascii,
|
|
{
|
|
"Name (ASCII)",
|
|
"rtcp.app.name",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_data,
|
|
{
|
|
"Application specific data",
|
|
"rtcp.app.data",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1,
|
|
{
|
|
"PoC1 Application specific data",
|
|
"rtcp.app.poc1",
|
|
FT_NONE,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_subtype,
|
|
{
|
|
"Subtype",
|
|
"rtcp.app.PoC1.subtype",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_floor_cnt_type_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_sip_uri,
|
|
{
|
|
"SIP URI",
|
|
"rtcp.app.poc1.sip.uri",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_disp_name,
|
|
{
|
|
"Display Name",
|
|
"rtcp.app.poc1.disp.name",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_priority,
|
|
{
|
|
"Priority",
|
|
"rtcp.app.poc1.priority",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_qsresp_priority_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_request_ts,
|
|
{
|
|
"Talk Burst Requst Timestamp",
|
|
"rtcp.app.poc1.request.ts",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_stt,
|
|
{
|
|
"Stop talking timer",
|
|
"rtcp.app.poc1.stt",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_partic,
|
|
{
|
|
"Number of participants",
|
|
"rtcp.app.poc1.participants",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_ssrc_granted,
|
|
{
|
|
"SSRC of client granted permission to talk",
|
|
"rtcp.app.poc1.ssrc.granted",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_last_pkt_seq_no,
|
|
{
|
|
"Sequence number of last RTP packet",
|
|
"rtcp.app.poc1.last.pkt.seq.no",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_ignore_seq_no,
|
|
{
|
|
"Ignore sequence number field",
|
|
"rtcp.app.poc1.ignore.seq.no",
|
|
FT_UINT16,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x8000,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_reason_code1,
|
|
{
|
|
"Reason code",
|
|
"rtcp.app.poc1.reason.code",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_reason_code1_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_reason1_phrase,
|
|
{
|
|
"Reason Phrase",
|
|
"rtcp.app.poc1.reason.phrase",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_reason_code2,
|
|
{
|
|
"Reason code",
|
|
"rtcp.app.poc1.reason.code",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_reason_code2_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_new_time_request,
|
|
{
|
|
"New time client can request (seconds)",
|
|
"rtcp.app.poc1.new.time.request",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Time in seconds client can request for", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_ack_subtype,
|
|
{
|
|
"Subtype",
|
|
"rtcp.app.poc1.ack.subtype",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_floor_cnt_type_vals),
|
|
0xf8,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_ack_reason_code,
|
|
{
|
|
"Reason code",
|
|
"rtcp.app.poc1.ack.reason.code",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_reason_code_ack_vals),
|
|
0x07ff,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_qsresp_priority,
|
|
{
|
|
"Priority",
|
|
"rtcp.app.poc1.qsresp.priority",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_qsresp_priority_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_qsresp_position,
|
|
{
|
|
"Position (number of clients ahead)",
|
|
"rtcp.app.poc1.qsresp.position",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_content[0],
|
|
{
|
|
"Identity of inviting client",
|
|
"rtcp.app.poc1.conn.content.a.id",
|
|
FT_BOOLEAN,
|
|
16,
|
|
NULL,
|
|
0x8000,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_content[1],
|
|
{
|
|
"Nick name of inviting client",
|
|
"rtcp.app.poc1.conn.content.a.dn",
|
|
FT_BOOLEAN,
|
|
16,
|
|
NULL,
|
|
0x4000,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_content[2],
|
|
{
|
|
"Session identity",
|
|
"rtcp.app.poc1.conn.content.sess.id",
|
|
FT_BOOLEAN,
|
|
16,
|
|
NULL,
|
|
0x2000,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_content[3],
|
|
{
|
|
"Group name",
|
|
"rtcp.app.poc1.conn.content.grp.dn",
|
|
FT_BOOLEAN,
|
|
16,
|
|
NULL,
|
|
0x1000,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_content[4],
|
|
{
|
|
"Group identity",
|
|
"rtcp.app.poc1.conn.content.grp.id",
|
|
FT_BOOLEAN,
|
|
16,
|
|
NULL,
|
|
0x0800,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_session_type,
|
|
{
|
|
"Session type",
|
|
"rtcp.app.poc1.conn.session.type",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_app_poc1_conn_sess_type_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_add_ind_mao,
|
|
{
|
|
"Manual answer override",
|
|
"rtcp.app.poc1.conn.add.ind.mao",
|
|
FT_BOOLEAN,
|
|
8,
|
|
NULL,
|
|
0x80,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_sdes_items[0],
|
|
{
|
|
"Identity of inviting client",
|
|
"rtcp.app.poc1.conn.sdes.a.id",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_sdes_items[1],
|
|
{
|
|
"Nick name of inviting client",
|
|
"rtcp.app.poc1.conn.sdes.a.dn",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_sdes_items[2],
|
|
{
|
|
"Session identity",
|
|
"rtcp.app.poc1.conn.sdes.sess.id",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_sdes_items[3],
|
|
{
|
|
"Group Name",
|
|
"rtcp.app.poc1.conn.sdes.grp.dn",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_app_poc1_conn_sdes_items[4],
|
|
{
|
|
"Group identity",
|
|
"rtcp.app.poc1.conn.sdes.grp.id",
|
|
FT_UINT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_fsn,
|
|
{
|
|
"First sequence number",
|
|
"rtcp.nack.fsn",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_blp,
|
|
{
|
|
"Bitmask of following lost packets",
|
|
"rtcp.nack.blp",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_padding_count,
|
|
{
|
|
"Padding count",
|
|
"rtcp.padding.count",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_padding_data,
|
|
{
|
|
"Padding data",
|
|
"rtcp.padding.data",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_profile_specific_extension,
|
|
{
|
|
"Profile-specific extension",
|
|
"rtcp.profile-specific-extension",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Profile-specific extension", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_setup,
|
|
{
|
|
"Stream setup",
|
|
"rtcp.setup",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Stream setup, method and frame number", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_setup_frame,
|
|
{
|
|
"Setup frame",
|
|
"rtcp.setup-frame",
|
|
FT_FRAMENUM,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Frame that set up this stream", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_setup_method,
|
|
{
|
|
"Setup Method",
|
|
"rtcp.setup-method",
|
|
FT_STRING,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Method used to set up this stream", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_last_sr_timestamp_frame,
|
|
{
|
|
"Frame matching Last SR timestamp",
|
|
"rtcp.lsr-frame",
|
|
FT_FRAMENUM,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Frame matching LSR field (used to calculate roundtrip delay)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_time_since_last_sr,
|
|
{
|
|
"Time since Last SR captured",
|
|
"rtcp.lsr-frame-captured",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Time since frame matching LSR field was captured", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_roundtrip_delay,
|
|
{
|
|
"Roundtrip Delay(ms)",
|
|
"rtcp.roundtrip-delay",
|
|
FT_INT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Calculated roundtrip delay in ms", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_block_type,
|
|
{
|
|
"Type",
|
|
"rtcp.xr.bt",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_xr_type_vals),
|
|
0x0,
|
|
"Block Type", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_block_specific,
|
|
{
|
|
"Type Specific",
|
|
"rtcp.xr.bs",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Reserved", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_block_length,
|
|
{
|
|
"Length",
|
|
"rtcp.xr.bl",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Block Length", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_ssrc_discarded,
|
|
{
|
|
"Fraction discarded",
|
|
"rtcp.ssrc.discarded",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Discard Rate", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_burst_density,
|
|
{
|
|
"Burst Density",
|
|
"rtcp.xr.voipmetrics.burstdensity",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_gap_density,
|
|
{
|
|
"Gap Density",
|
|
"rtcp.xr.voipmetrics.gapdensity",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_burst_duration,
|
|
{
|
|
"Burst Duration(ms)",
|
|
"rtcp.xr.voipmetrics.burstduration",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_gap_duration,
|
|
{
|
|
"Gap Duration(ms)",
|
|
"rtcp.xr.voipmetrics.gapduration",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_rtdelay,
|
|
{
|
|
"Round Trip Delay(ms)",
|
|
"rtcp.xr.voipmetrics.rtdelay",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_esdelay,
|
|
{
|
|
"End System Delay(ms)",
|
|
"rtcp.xr.voipmetrics.esdelay",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_siglevel,
|
|
{
|
|
"Signal Level",
|
|
"rtcp.xr.voipmetrics.signallevel",
|
|
FT_INT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Signal level of 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_noiselevel,
|
|
{
|
|
"Noise Level",
|
|
"rtcp.xr.voipmetrics.noiselevel",
|
|
FT_INT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Noise level of 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_rerl,
|
|
{
|
|
"Residual Echo Return Loss",
|
|
"rtcp.xr.voipmetrics.rerl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_gmin,
|
|
{
|
|
"Gmin",
|
|
"rtcp.xr.voipmetrics.gmin",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_rfactor,
|
|
{
|
|
"R Factor",
|
|
"rtcp.xr.voipmetrics.rfactor",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"R Factor is in the range of 0 to 100; 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_extrfactor,
|
|
{
|
|
"External R Factor",
|
|
"rtcp.xr.voipmetrics.extrfactor",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"R Factor is in the range of 0 to 100; 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_moslq,
|
|
{
|
|
"MOS - Listening Quality",
|
|
"rtcp.xr.voipmetrics.moslq",
|
|
FT_FLOAT,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"MOS is in the range of 1 to 5; 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_moscq,
|
|
{
|
|
"MOS - Conversational Quality",
|
|
"rtcp.xr.voipmetrics.moscq",
|
|
FT_FLOAT,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"MOS is in the range of 1 to 5; 127 indicates this parameter is unavailable", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_plc,
|
|
{
|
|
"Packet Loss Conealment Algorithm",
|
|
"rtcp.xr.voipmetrics.plc",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_xr_plc_algo_vals),
|
|
0xC0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_jbadaptive,
|
|
{
|
|
"Adaptive Jitter Buffer Algorithm",
|
|
"rtcp.xr.voipmetrics.jba",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_xr_jb_adaptive_vals),
|
|
0x30,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_jbrate,
|
|
{
|
|
"Jitter Buffer Rate",
|
|
"rtcp.xr.voipmetrics.jbrate",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0F,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_jbnominal,
|
|
{
|
|
"Nominal Jitter Buffer Size",
|
|
"rtcp.xr.voipmetrics.jbnominal",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_jbmax,
|
|
{
|
|
"Maximum Jitter Buffer Size",
|
|
"rtcp.xr.voipmetrics.jbmax",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_voip_metrics_jbabsmax,
|
|
{
|
|
"Absolute Maximum Jitter Buffer Size",
|
|
"rtcp.xr.voipmetrics.jbabsmax",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_thinning,
|
|
{
|
|
"Thinning factor",
|
|
"rtcp.xr.tf",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0F,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_loss_flag,
|
|
{
|
|
"Loss Report Flag",
|
|
"rtcp.xr.stats.lrflag",
|
|
FT_BOOLEAN,
|
|
8,
|
|
NULL,
|
|
0x80,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_dup_flag,
|
|
{
|
|
"Duplicates Report Flag",
|
|
"rtcp.xr.stats.dupflag",
|
|
FT_BOOLEAN,
|
|
8,
|
|
NULL,
|
|
0x40,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_jitter_flag,
|
|
{
|
|
"Jitter Report Flag",
|
|
"rtcp.xr.stats.jitterflag",
|
|
FT_BOOLEAN,
|
|
8,
|
|
NULL,
|
|
0x20,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_ttl,
|
|
{
|
|
"TTL or Hop Limit Flag",
|
|
"rtcp.xr.stats.ttl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_xr_ip_ttl_vals),
|
|
0x18,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_endseq,
|
|
{
|
|
"End Sequence Number",
|
|
"rtcp.xr.endseq",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_beginseq,
|
|
{
|
|
"Begin Sequence Number",
|
|
"rtcp.xr.beginseq",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_lost,
|
|
{
|
|
"Lost Packets",
|
|
"rtcp.xr.stats.lost",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_dups,
|
|
{
|
|
"Duplicate Packets",
|
|
"rtcp.xr.stats.dups",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_minjitter,
|
|
{
|
|
"Minimum Jitter",
|
|
"rtcp.xr.stats.minjitter",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_maxjitter,
|
|
{
|
|
"Maximum Jitter",
|
|
"rtcp.xr.stats.maxjitter",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_meanjitter,
|
|
{
|
|
"Mean Jitter",
|
|
"rtcp.xr.stats.meanjitter",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_devjitter,
|
|
{
|
|
"Standard Deviation of Jitter",
|
|
"rtcp.xr.stats.devjitter",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_minttl,
|
|
{
|
|
"Minimum TTL or Hop Limit",
|
|
"rtcp.xr.stats.minttl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_maxttl,
|
|
{
|
|
"Maximum TTL or Hop Limit",
|
|
"rtcp.xr.stats.maxttl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_meanttl,
|
|
{
|
|
"Mean TTL or Hop Limit",
|
|
"rtcp.xr.stats.meanttl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_stats_devttl,
|
|
{
|
|
"Standard Deviation of TTL",
|
|
"rtcp.xr.stats.devttl",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_lrr,
|
|
{
|
|
"Last RR timestamp",
|
|
"rtcp.xr.lrr",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_dlrr,
|
|
{
|
|
"Delay since last RR timestamp",
|
|
"rtcp.xr.dlrr",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_length_check,
|
|
{
|
|
"RTCP frame length check",
|
|
"rtcp.length_check",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"RTCP frame length check", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_bye_reason_not_padded,
|
|
{
|
|
"BYE reason string not NULL padded",
|
|
"rtcp.bye_reason_not_padded",
|
|
FT_NONE,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"RTCP BYE reason string not padded", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_rtpfb_fmt,
|
|
{
|
|
"RTCP Feedback message type (FMT)",
|
|
"rtcp.rtpfb.fmt",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_rtpfb_fmt_vals),
|
|
0x1f,
|
|
"RTCP Feedback message type (FMT)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_psfb_fmt,
|
|
{
|
|
"RTCP Feedback message type (FMT)",
|
|
"rtcp.psfb.fmt",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(rtcp_psfb_fmt_vals),
|
|
0x1f,
|
|
"RTCP Feedback message type (FMT)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_rtpfb_nack_pid,
|
|
{
|
|
"RTCP Transport Feedback NACK",
|
|
"rtcp.rtpfb.nack",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"RTCP Transport Feedback NACK", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_rtpfb_nack_blp,
|
|
{
|
|
"RTCP Transport Feedback NACK BLP",
|
|
"rtcp.rtpfb.nack.blp",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"RTCP Transport Feedback NACK BLP", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_fci,
|
|
{
|
|
"Feedback Control Information (FCI)",
|
|
"rtcp.fci",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Feedback Control Information (FCI)", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_srtcp_e,
|
|
{
|
|
"SRTCP E flag",
|
|
"srtcp.e",
|
|
FT_BOOLEAN,
|
|
32,
|
|
NULL,
|
|
0x80000000,
|
|
"SRTCP Encryption Flag", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_srtcp_index,
|
|
{
|
|
"SRTCP Index",
|
|
"srtcp.index",
|
|
FT_UINT32,
|
|
BASE_DEC_HEX,
|
|
NULL,
|
|
0x7fffffff,
|
|
"SRTCP Index", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_srtcp_mki,
|
|
{
|
|
"SRTCP MKI",
|
|
"srtcp.mki",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0,
|
|
"SRTCP Master Key Index", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_srtcp_auth_tag,
|
|
{
|
|
"SRTCP Auth Tag",
|
|
"srtcp.auth_tag",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0,
|
|
"SRTCP Authentication Tag", HFILL
|
|
}
|
|
},
|
|
/* additions for BT XNQ block as defined in RFC5093 */
|
|
{
|
|
&hf_rtcp_xr_btxnq_begseq,
|
|
{
|
|
"Starting sequence number",
|
|
"rtcp.xr.btxnq.begseq",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_endseq,
|
|
{
|
|
"Last sequence number",
|
|
"rtcp.xr.btxnq.endseq",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_vmaxdiff,
|
|
{
|
|
"Maximum IPDV difference in 1 cycle",
|
|
"rtcp.xr.btxnq.vmaxdiff",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_vrange,
|
|
{
|
|
"Maximum IPDV difference seen to date",
|
|
"rtcp.xr.btxnq.vrange",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_vsum,
|
|
{
|
|
"Sum of peak IPDV differences to date",
|
|
"rtcp.xr.btxnq.vsum",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_cycles,
|
|
{
|
|
"Number of cycles in calculation",
|
|
"rtcp.xr.btxnq.cycles",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_jbevents,
|
|
{
|
|
"Number of jitter buffer adaptions to date",
|
|
"rtcp.xr.btxnq.jbevents",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_spare,
|
|
{
|
|
"Spare/reserved bits",
|
|
"rtcp.xr.btxnq.spare",
|
|
FT_STRING,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_tdegnet,
|
|
{
|
|
"Time degraded by packet loss or late delivery",
|
|
"rtcp.xr.btxnq.tdegnet",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_tdegjit,
|
|
{
|
|
"Time degraded by jitter buffer adaption events",
|
|
"rtcp.xr.btxnq.tdegjit",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_es,
|
|
{
|
|
"ES due to unavailable packet events",
|
|
"rtcp.xr.btxnq.es",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtcp_xr_btxnq_ses,
|
|
{
|
|
"SES due to unavailable packet events",
|
|
"rtcp.xr.btxnq.ses",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_rtcp,
|
|
&ett_rtcp_sr,
|
|
&ett_rtcp_rr,
|
|
&ett_rtcp_sdes,
|
|
&ett_rtcp_bye,
|
|
&ett_rtcp_app,
|
|
&ett_rtcp_rtpfb,
|
|
&ett_rtcp_psfb,
|
|
&ett_rtcp_xr,
|
|
&ett_rtcp_fir,
|
|
&ett_rtcp_nack,
|
|
&ett_ssrc,
|
|
&ett_ssrc_item,
|
|
&ett_ssrc_ext_high,
|
|
&ett_sdes,
|
|
&ett_sdes_item,
|
|
&ett_PoC1,
|
|
&ett_rtcp_setup,
|
|
&ett_rtcp_roundtrip_delay,
|
|
&ett_xr_block,
|
|
&ett_xr_block_contents,
|
|
&ett_xr_ssrc,
|
|
&ett_xr_loss_chunk,
|
|
&ett_poc1_conn_contents,
|
|
&ett_rtcp_nack_blp,
|
|
};
|
|
|
|
module_t *rtcp_module;
|
|
|
|
proto_rtcp = proto_register_protocol("Real-time Transport Control Protocol",
|
|
"RTCP", "rtcp");
|
|
proto_register_field_array(proto_rtcp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_dissector("rtcp", dissect_rtcp, proto_rtcp);
|
|
|
|
rtcp_module = prefs_register_protocol(proto_rtcp, NULL);
|
|
|
|
prefs_register_bool_preference(rtcp_module, "show_setup_info",
|
|
"Show stream setup information",
|
|
"Where available, show which protocol and frame caused "
|
|
"this RTCP stream to be created",
|
|
&global_rtcp_show_setup_info);
|
|
|
|
prefs_register_bool_preference(rtcp_module, "heuristic_rtcp",
|
|
"Try to decode RTCP outside of conversations ",
|
|
"If call control SIP/H.323/RTSP/.. messages are missing in the trace, "
|
|
"RTCP isn't decoded without this",
|
|
&global_rtcp_heur);
|
|
|
|
prefs_register_bool_preference(rtcp_module, "show_roundtrip_calculation",
|
|
"Show relative roundtrip calculations",
|
|
"Try to work out network delay by comparing time between packets "
|
|
"as captured and delays as seen by endpoint",
|
|
&global_rtcp_show_roundtrip_calculation);
|
|
|
|
prefs_register_uint_preference(rtcp_module, "roundtrip_min_threshhold",
|
|
"Minimum roundtrip calculation to report (ms)",
|
|
"Minimum (absolute) calculated roundtrip delay time in milliseconds that "
|
|
"should be reported",
|
|
10, &global_rtcp_show_roundtrip_calculation_minimum);
|
|
|
|
|
|
}
|
|
|
|
void
|
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proto_reg_handoff_rtcp(void)
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{
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/*
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* Register this dissector as one that can be selected by a
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* UDP port number.
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*/
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rtcp_handle = find_dissector("rtcp");
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dissector_add_handle("udp.port", rtcp_handle);
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heur_dissector_add( "udp", dissect_rtcp_heur, proto_rtcp);
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heur_dissector_add("stun2", dissect_rtcp_heur, proto_rtcp);
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}
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