/* packet-rtp-events.c

 *

 * Routines for RFC 2833 RTP Events dissection

 * Copyright 2003, Kevin A. Noll <knoll[AT]poss.com>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 * Ref https://tools.ietf.org/html/rfc4733

 */

/*

 * This dissector tries to dissect RTP Events.

 *

 * Cisco NSE is now supported, additions by

 *                Gonzalo Salgueiro <gsalguei@cisco.com>

 *          Chidambaram Arunachalam <carunach@cisco.com>

 * Copyright 2008, Cisco Systems, Inc.

 */

#include "config.h"

#include <epan/packet.h>

#include <epan/prefs.h>

#include <epan/proto_data.h>

#include "packet-rtp-events.h"

#include "packet-rtp.h"

#include <epan/tap.h>

void proto_register_rtp_events(void);

void proto_reg_handoff_rtp_events(void);

/* 101 for RTP Event, 100 for Cisco NSE */

#define RTP_EVENT_DEFAULT_PT_RANGE "100-101"

/* RTP Event Fields */

static int proto_rtp_events;

static int rtp_event_tap;

static int hf_rtp_events_event; /* one byte */

static int hf_rtp_events_end; /* one bit */

static int hf_rtp_events_reserved; /* one bit */

static int hf_rtp_events_volume;  /* six bits */

static int hf_rtp_events_duration; /* sixteen bits */

#define RTP_DTMF_0  0

#define RTP_DTMF_1  1

#define RTP_DTMF_2  2

#define RTP_DTMF_3  3

#define RTP_DTMF_4  4

#define RTP_DTMF_5  5

#define RTP_DTMF_6  6

#define RTP_DTMF_7  7

#define RTP_DTMF_8  8

#define RTP_DTMF_9  9

#define RTP_DTMF_STAR 10

#define RTP_DTMF_POUND  11

#define RTP_DTMF_A  12

#define RTP_DTMF_B  13

#define RTP_DTMF_C  14

#define RTP_DTMF_D  15

#define RTP_DTMF_FLASH  16

#define RTP_ANS   32

#define RTP_ANSREV  33

#define RTP_ANSAM 34

#define RTP_ANSAMREV  35

#define RTP_CNG   36

#define RTP_V21C1B0 37

#define RTP_V21C1B1 38

#define RTP_V21C2B0 39

#define RTP_V21C2B1 40

#define RTP_CRDI  41

#define RTP_CRDR  42

#define RTP_CRE   43

#define RTP_ESI   44

#define RTP_ESR   45

#define RTP_MRDI  46

#define RTP_MRDR  47

#define RTP_MRE   48

#define RTP_CT    49

#define RTP_OFFHOOK 64

#define RTP_ONHOOK  65

#define RTP_DIALTONE  66

#define RTP_INTDT 67

#define RTP_SPCDT 68

#define RTP_2NDDT 69

#define RTP_RGTONE  70

#define RTP_SPRGTONE  71

#define RTP_BUSYTONE  72

#define RTP_CNGTONE 73

#define RTP_SPINFOTN  74

#define RTP_CMFTTONE  75

#define RTP_HOLDTONE  76

#define RTP_RECTONE 77

#define RTP_CLRWTTONE 78

#define RTP_CWTONE  79

#define RTP_PAYTONE 80

#define RTP_POSINDTONE  81

#define RTP_NEGINDTONE  82

#define RTP_WARNTONE  83

#define RTP_INTRTONE  84

#define RTP_CALLCDTONE  85

#define RTP_PAYPHONE  86

#define RTP_CAS   87

#define RTP_OFFHKWARN 88

#define RTP_RING  89

#define RTP_ACCPTTONE 96

#define RTP_CONFIRMTN 97

#define RTP_DLTNRECALL  98

#define RTP_END3WAYTN 99

#define RTP_FACTONE 100

#define RTP_LNLOCKTN  101

#define RTP_NUMUNOBT  102

#define RTP_OFFERGTONE  103

#define RTP_PERMSIGTN 104

#define RTP_PREEMPTTN 105

#define RTP_QUETONE 106

#define RTP_REFUSALTN 107

#define RTP_ROUTETONE 108

#define RTP_VALIDTONE 109

#define RTP_WAITGTONE 110

#define RTP_WARNEOPTN 111

#define RTP_WARNPIPTN 112

#define RTP_MF0   128

#define RTP_MF1   129

#define RTP_MF2   130

#define RTP_MF3   131

#define RTP_MF4   132

#define RTP_MF5   133

#define RTP_MF6   134

#define RTP_MF7   135

#define RTP_MF8   136

#define RTP_MF9   137

#define RTP_K0    138

#define RTP_K1    139

#define RTP_K2    140

#define RTP_S0    141

#define RTP_S1    142

#define RTP_S3    143

#define RTP_WINK  160

#define RTP_WINKOFF 161

#define RTP_INCSEIZ 162

#define RTP_SEIZURE 163

#define RTP_UNSEIZE 164

#define RTP_COT   165

#define RTP_DEFCOT  166

#define RTP_COTTONE 167

#define RTP_COTSEND 168

#define RTP_COTVERFD  170

#define RTP_LOOPBACK  171

#define RTP_MWATTTONE 172

#define RTP_NEWMWATTTN  173

#define RTP_CISCO_NSE_FAX_PASSTHROUGH_IND    192

#define RTP_CISCO_NSE_MODEM_PASSTHROUGH_IND  193

#define RTP_CISCO_NSE_VOICE_MODE_IND         194

#define RTP_CISCO_NSE_MODEM_RELAY_CAP_IND    199

#define RTP_CISCO_NSE_FAX_RELAY_IND          200

#define RTP_CISCO_NSE_ACK                    201

#define RTP_CISCO_NSE_NACK                   202

#define RTP_CISCO_NSE_MODEM_RELAY_IND        203

/* https://www.iana.org/assignments/audio-telephone-event-registry/audio-telephone-event-registry.xml */

static const value_string rtp_event_type_values[] =

{

    { RTP_DTMF_0,                   "DTMF Zero 0" },

    { RTP_DTMF_1,                   "DTMF One 1" },

    { RTP_DTMF_2,                   "DTMF Two 2" },

    { RTP_DTMF_3,                   "DTMF Three 3" },

    { RTP_DTMF_4,                   "DTMF Four 4" },

    { RTP_DTMF_5,                   "DTMF Five 5" },

    { RTP_DTMF_6,                   "DTMF Six 6" },

    { RTP_DTMF_7,                   "DTMF Seven 7" },

    { RTP_DTMF_8,                   "DTMF Eight 8" },

    { RTP_DTMF_9,                   "DTMF Nine 9" },

    { RTP_DTMF_STAR,                "DTMF Star *" },

    { RTP_DTMF_POUND,               "DTMF Pound #" },

    { RTP_DTMF_A,                   "DTMF A" },

    { RTP_DTMF_B,                   "DTMF B" },

    { RTP_DTMF_C,                   "DTMF C" },

    { RTP_DTMF_D,                   "DTMF D" },

    { RTP_DTMF_FLASH,               "Flash" },

    /* 17-22    Unassigned*/

    { 23,                           "CRdSeg: second segment of V.8 bis CRd signal" }, // [RFC4734]

    { 24,                           "CReSeg : second segment of V.8 bis CRe signal" }, // [RFC4734]

    { 25,                           "MRdSeg : second segment of V.8 bis MRd signal" }, // [RFC4734]

    { 26,                           "MReSeg : second segment of V.8 bis MRe signal" }, // [RFC4734]

    { 27,                           "V32AC : A pattern of bits modulated at 4800 bits / s, emitted by a V.32 / V.32bis answering terminal upon detection of the AA pattern." }, // [RFC4734]

    { 28,                           "V8bISeg : first segment of initiating V.8 bis signal" }, // [RFC4734]

    { 29,                           "V8bRSeg : first segment of responding V.8 bis signal" }, // [RFC4734]

    { 30,                           "V21L300 : 300 bits / s low channel V.21 indication" }, // [RFC4734]

    { 31,                           "V21H300 : 300 bits / s high channel V.21 indication" }, // [RFC4734]

    { RTP_ANS,                      "Fax ANS"},

    { RTP_ANSREV,                   "Fax /ANS"},

    { RTP_ANSAM,                    "Fax ANSam"},

    { RTP_ANSAMREV,                 "Fax /ANSam"},

    { RTP_CNG,                      "Fax CNG"},

    { RTP_V21C1B0,                  "V.21 channel 1, 0 bit"},

    { RTP_V21C1B1,                  "V.21 channel 1, 1 bit"},

    { RTP_V21C2B0,                  "V.21 channel 2, 0 bit"},

    { RTP_V21C2B1,                  "V.21 channel 2, 1 bit"},

    { RTP_CRDI,                     "Fax CRdi"},

    { RTP_CRDR,                     "Fax CRdr"},

    { RTP_CRE,                      "Fax CRe"},

    { RTP_ESI,                      "Fax ESi"},

    { RTP_ESR,                      "Fax ESr"},

    { RTP_MRDI,                     "Fax MRdi"},

    { RTP_MRDR,                     "Fax MRdr"},

    { RTP_MRE,                      "Fax MRe"},

    { RTP_CT,                       "Fax CT"},

    /* 50-51    Unassigned*/

    { 52,                           "ANS2225: 2225 Hz indication for text telephony" }, // [RFC4734]

    { 53,                           "CI(V.8 Call Indicator signal preamble)" }, // [RFC4734]

    { 54,                           "V.21 preamble flag(T.30)" }, // [RFC4734]

    { 55,                           "V21L110 : 110 bits / s V.21 indication for text telephony" }, // [RFC4734]

    { 56,                           "B103L300 : Bell 103 low channel indication for text telephony" }, // [RFC4734]

    { 57,                           "V23Main : V.23 main channel indication for text telephony" }, // [RFC4734]

    { 58,                           "V23Back : V.23 back channel indication for text telephony" }, // [RFC4734]

    { 59,                           "Baud4545 : 45.45 bits / s Baudot indication for text telephony" }, // [RFC4734]

    { 60,                           "Baud50 : 50 bits / s Baudot indication for text telephony" }, // [RFC4734]

    { 61,                           "VBDGen : Tone patterns indicative of use of an unidentified modem type" }, // [RFC4734]

    { 62,                           "XCIMark : A pattern of bits modulated in the V.23 main channel, emitted by a V.18 calling terminal" }, // [RFC4734]

    { 63,                           "V32AA : A pattern of bits modulated at 4800 bits / s, emitted by a V.32 / V.23bis calling terminal" }, // [RFC4734]

    { RTP_OFFHOOK,                  "Off Hook"},

    { RTP_ONHOOK,                   "On Hook"},

    { RTP_DIALTONE,                 "Dial tone"},

    { RTP_INTDT,                    "PABX internal dial tone"},

    { RTP_SPCDT,                    "Special dial tone"},

    { RTP_2NDDT,                    "Second dial tone"},

    { RTP_RGTONE,                   "Ringing tone"},

    { RTP_SPRGTONE,                  "Special ringing tone"},

    { RTP_BUSYTONE,                  "Busy tone"},

    { RTP_CNGTONE,                   "Congestion tone"},

    { RTP_SPINFOTN,                  "Special information tone"},

    { RTP_CMFTTONE,                  "Comfort tone"},

    { RTP_HOLDTONE,                  "Hold tone"},

    { RTP_RECTONE,                   "Record tone"},

    { RTP_CLRWTTONE,                 "Caller waiting tone"},

    { RTP_CWTONE,                    "Call waiting tone"},

    { RTP_PAYTONE,                   "Pay tone"},

    { RTP_POSINDTONE,                "Positive indication tone"},

    { RTP_NEGINDTONE,                "Negative indication tone"},

    { RTP_WARNTONE,                  "Warning tone"},

    { RTP_INTRTONE,                  "Intrusion tone"},

    { RTP_CALLCDTONE,                "Calling card service tone"},

    { RTP_PAYPHONE,                  "Payphone recognition tone"},

    { RTP_CAS,                       "CPE alerting signal (CAS)"},

    { RTP_OFFHKWARN,                 "Off-hook warning tone"},

    { RTP_RING,                      "Ring"},

    { RTP_ACCPTTONE,                 "Acceptance tone"},

    { RTP_CONFIRMTN,                 "Confirmation tone"},

    { RTP_DLTNRECALL,                "Dial tone, recall"},

    { RTP_END3WAYTN,                 "End of three party service tone"},

    { RTP_FACTONE,                   "Facilities tone"},

    { RTP_LNLOCKTN,                  "Line lockout tone"},

    { RTP_NUMUNOBT,                  "Number unobtainable tone"},

    { RTP_OFFERGTONE,                "Offering tone"},

    { RTP_PERMSIGTN,                 "Permanent signal tone"},

    { RTP_PREEMPTTN,                 "Preemption tone"},

    { RTP_QUETONE,                   "Queue tone"},

    { RTP_REFUSALTN,                 "Refusal tone"},

    { RTP_ROUTETONE,                 "Route tone"},

    { RTP_VALIDTONE,                 "Valid tone"},

    { RTP_WAITGTONE,                 "Waiting tone"},

    { RTP_WARNEOPTN,                 "Warning tone (end of period)"},

    { RTP_WARNPIPTN,                 "Warning Tone (PIP tone)"},

    { 115,                           "North American SIT Segment 1 Low" }, // [GR - 674]

    { 116,                           "North American SIT Segment 1 High" }, // [GR - 674]

    { 117,                           "North American SIT Segment 2 Low" }, // [GR - 674]

    { 118,                           "North American SIT Segment 2 High" }, // [GR - 674]

    { 119,                           "North American SIT Segment 3" }, // [GR - 674]

    { 120,                           "North American Coin Deposit" }, // [GR - 506]

    { 121,                           "Continuity check - tone" }, // [RFC5244]

    { 122,                           "Continuity verify - tone" }, // [RFC5244]

    { 123,                           "MF Code 11 (SS No. 5) or KP3P / ST3P(R1) or North American Ringback" }, // [GR-506]

    { 124,                           "MF KP(SS No. 5) or KP1(R1) or North American Coin Return" }, // [GR-506]

    { 125,                           "MF KP2(SS No. 5) or KP2P / ST2P(R1)" }, // [RFC5244]

    { 126,                           "MF ST(SS No. 5 and R1) or North American Coin Collect / Operator Released" }, // [GR-506]

    { 127,                           "MF Code 12 (SS No. 5) or KP'/STP (R1)" },

    { RTP_MF0,                       "MF 0"},

    { RTP_MF1,                       "MF 1"},

    { RTP_MF2,                       "MF 2"},

    { RTP_MF3,                       "MF 3"},

    { RTP_MF4,                       "MF 4"},

    { RTP_MF5,                       "MF 5"},

    { RTP_MF6,                       "MF 6"},

    { RTP_MF7,                       "MF 7"},

    { RTP_MF8,                       "MF 8"},

    { RTP_MF9,                       "MF 9"},

    { RTP_K0,                        "MF K0 or KP (start-of-pulsing)"},

    { RTP_K1,                        "MF K1"},

    { RTP_K2,                        "MF K2"},

    { RTP_S0,                        "MF S0 to ST (end-of-pulsing)"},

    { RTP_S1,                        "MF S1"},

    { RTP_S3,                        "MF S3"},

    { 144,                           "ABCD signalling state '0000'" }, // [RFC5244]

    { 145,                           "ABCD signalling state '0001'" }, // [RFC5244]

    { 146,                           "ABCD signalling state '0010'" }, // [RFC5244]

    { 147,                           "ABCD signalling state '0011'" }, // [RFC5244]

    { 148,                           "ABCD signalling state '0100'" }, // [RFC5244]

    { 149,                           "ABCD signalling state '0101'" }, // [RFC5244]

    { 150,                           "ABCD signalling state '0110'" }, // [RFC5244]

    { 151,                           "ABCD signalling state '0111'" }, // [RFC5244]

    { 152,                           "ABCD signalling state '1000'" }, // [RFC5244]

    { 153,                           "ABCD signalling state '1001'" }, // [RFC5244]

    { 154,                           "ABCD signalling state '1010'" }, // [RFC5244]

    { 155,                           "ABCD signalling state '1011'" }, // [RFC5244]

    { 156,                           "ABCD signalling state '1100'" }, // [RFC5244]

    { 157,                           "ABCD signalling state '1101'" }, // [RFC5244]

    { 158,                           "ABCD signalling state '1110'" }, // [RFC5244]

    { 159,                           "ABCD signalling state '1111'" }, // [RFC5244]

    { RTP_WINK,                      "Wink"},

    { RTP_WINKOFF,                   "Wink off"},

    { RTP_INCSEIZ,                   "Incoming seizure"},

    { RTP_SEIZURE,                   "Seizure"},

    { RTP_UNSEIZE,                   "Unseize circuit"},

    { RTP_COT,                       "Continuity test"},

    { RTP_DEFCOT,                    "Default continuity tone"},

    { RTP_COTTONE,                   "Continuity tone (single tone)"},

    { RTP_COTSEND,                   "Continuity test send"},

    { RTP_COTVERFD,                  "Continuity verified"},

    { RTP_LOOPBACK,                  "Loopback"},

    { RTP_MWATTTONE,                 "Old milliwatt tone (1000 Hz)"},

    { RTP_NEWMWATTTN,                "New milliwatt tone (1004 Hz)"},

    { 174,                           "Metering pulse" }, // [RFC5244]

    { 175,                           "Trunk unavailable" }, // [RFC5244]

    { 176,                           "MFC forward signal 1" }, // [RFC5244]

    { 177,                           "MFC forward signal 2" }, // [RFC5244]

    { 178,                           "MFC forward signal 3" }, // [RFC5244]

    { 179,                           "MFC forward signal 4" }, // [RFC5244]

    { 180,                           "MFC forward signal 5" }, // [RFC5244]

    { 181,                           "MFC forward signal 6" }, // [RFC5244]

    { 182,                           "MFC forward signal 7" }, // [RFC5244]

    { 183,                           "MFC forward signal 8" }, // [RFC5244]

    { 184,                           "MFC forward signal 9" }, // [RFC5244]

    { 185,                           "MFC forward signal 10" }, // [RFC5244]

    { 186,                           "MFC forward signal 11" }, // [RFC5244]

    { 187,                           "MFC forward signal 12" }, // [RFC5244]

    { 188,                           "MFC forward signal 13" }, // [RFC5244]

    { 189,                           "MFC forward signal 14" }, // [RFC5244]

    { 190,                           "MFC forward signal 15" }, // [RFC5244]

    { 191,                           "MFC backward signal 1" }, // [RFC5244]

    //{ 192,                           "MFC backward signal 2" }, // [RFC5244]

        //193 MFC backward signal 3[RFC5244]

        //194 MFC backward signal 4[RFC5244]

        //195 MFC backward signal 5[RFC5244]

        //196 MFC backward signal 6[RFC5244]

        //197 MFC backward signal 7[RFC5244]

        //198 MFC backward signal 8[RFC5244]

        //199 MFC backward signal 9[RFC5244]

        //200 MFC backward signal 10[RFC5244]

        //201 MFC backward signal 11[RFC5244]

        //202 MFC backward signal 12[RFC5244]

        //203 MFC backward signal 13[RFC5244]

        //204 MFC backward signal 14[RFC5244]

        //205 MFC backward signal 15[RFC5244]

        //206 A bit signalling state '0'[RFC5244]

        //207 A bit signalling state '1'[RFC5244]

        //208 AB bit signalling state '00'[RFC5244]

        //209 AB bit signalling state '01'[RFC5244]

        //210 AB bit signalling state '10'[RFC5244]

        //211 AB bit signalling state '11'  [RFC5244]

    { RTP_CISCO_NSE_FAX_PASSTHROUGH_IND,   "Cisco NSE: Shift to voiceband data mode"},

    { RTP_CISCO_NSE_MODEM_PASSTHROUGH_IND, "Cisco NSE: Disable echo cancellation"},

    { RTP_CISCO_NSE_VOICE_MODE_IND,        "Cisco NSE: Shift to voice mode"},

    { RTP_CISCO_NSE_MODEM_RELAY_CAP_IND,   "Cisco NSE: Advertise Modem relay capability"},

    { RTP_CISCO_NSE_FAX_RELAY_IND,         "Cisco NSE: Shift to fax relay mode"},

    { RTP_CISCO_NSE_ACK,                   "Positive acknowledgement of Cisco NSE"},

    { RTP_CISCO_NSE_NACK,                  "Negative acknowledgement of Cisco NSE"},

    { RTP_CISCO_NSE_MODEM_RELAY_IND ,      "Cisco NSE: Shift to modem relay mode"},

    { 0,               NULL },

};

value_string_ext rtp_event_type_values_ext = VALUE_STRING_EXT_INIT(rtp_event_type_values);

/* RTP Events fields defining a subtree */

static int ett_rtp_events;

static dissector_handle_t rtp_events_handle;

static struct _rtp_event_info rtp_event_info;

static int

dissect_rtp_events( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ )

{

  proto_item   *ti;

  proto_tree   *rtp_events_tree;

  unsigned int  offset = 0;

  struct _rtp_packet_info *p_packet_data;

  uint8_t rtp_evt;

  uint8_t octet;

  static int * const events[] = {

    &hf_rtp_events_end,

    &hf_rtp_events_reserved,

    &hf_rtp_events_volume,

    NULL

  };

  col_set_str(pinfo->cinfo, COL_PROTOCOL, "RTP EVENT");

  col_clear(pinfo->cinfo, COL_INFO);

  /* Get event fields */

  rtp_evt = tvb_get_uint8(tvb, offset );

  /* get tap info */

  rtp_event_info.info_rtp_evt = rtp_evt;

  p_packet_data = (struct _rtp_packet_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_get_id_by_filter_name("rtp"), RTP_CONVERSATION_PROTO_DATA);

  if (p_packet_data)

    rtp_event_info.info_setup_frame_num = p_packet_data->frame_number;

  else

    rtp_event_info.info_setup_frame_num = 0;

  col_add_fstr( pinfo->cinfo, COL_INFO,

    "Payload type=RTP Event, %s",

    val_to_str_ext( rtp_evt, &rtp_event_type_values_ext, "Unknown (%u)" ));

  ti = proto_tree_add_item( tree, proto_rtp_events, tvb, offset, -1, ENC_NA );

  rtp_events_tree = proto_item_add_subtree( ti, ett_rtp_events );

  proto_tree_add_uint ( rtp_events_tree, hf_rtp_events_event, tvb, offset, 1, rtp_evt);

  offset++;

  octet = tvb_get_uint8(tvb, offset);

  proto_tree_add_bitmask_list(rtp_events_tree, tvb, offset, 1, events, ENC_NA);

  offset++;

  /* The duration field indicates the duration of the event or segment

   * being reported, in timestamp units.

   */

  rtp_event_info.info_duration = tvb_get_ntohs(tvb, offset);

  proto_tree_add_item ( rtp_events_tree, hf_rtp_events_duration, tvb, offset, 2, ENC_BIG_ENDIAN);

  /* set the end info for the tap */

  if (octet & 0x80)

  {

    rtp_event_info.info_end = true;

  } else

  {

    rtp_event_info.info_end = false;

  }

  /* Make end-of-event packets obvious in the info column */

  if ((octet & 0x80))

  {

    col_append_str(pinfo->cinfo, COL_INFO, " (end)");

  }

  tap_queue_packet(rtp_event_tap, pinfo, &rtp_event_info);

  return tvb_captured_length(tvb);

}

void

proto_register_rtp_events(void)

{

  module_t *rtp_events_module;

  static hf_register_info hf[] =

  {

    {

      &hf_rtp_events_event,

      {

        "Event ID",

        "rtpevent.event_id",

        FT_UINT8,

        BASE_DEC | BASE_EXT_STRING,

        &rtp_event_type_values_ext,

        0x0,

        NULL, HFILL

      }

    },

    {

      &hf_rtp_events_end,

      {

        "End of Event",

        "rtpevent.end_of_event",

        FT_BOOLEAN,

        8,

        NULL,

        0x80,

        NULL, HFILL

      }

    },

    {

      &hf_rtp_events_reserved,

      {

        "Reserved",

        "rtpevent.reserved",

        FT_BOOLEAN,

        8,

        NULL,

        0x40,

        NULL, HFILL

      }

    },

    {

      &hf_rtp_events_volume,

      {

        "Volume",

        "rtpevent.volume",

        FT_UINT8,

        BASE_DEC,

        NULL,

        0x3F,

        NULL, HFILL

      }

    },

    {

      &hf_rtp_events_duration,

      {

        "Event Duration",

        "rtpevent.duration",

        FT_UINT16,

        BASE_DEC,

        NULL,

        0x0,

        NULL, HFILL

      }

    },

  };

  static int *ett[] =

  {

    &ett_rtp_events,

  };

  proto_rtp_events = proto_register_protocol("RFC 2833 RTP Event", "RTP Event", "rtpevent");

  proto_register_field_array(proto_rtp_events, hf, array_length(hf));

  proto_register_subtree_array(ett, array_length(ett));

  /* Register preferences */

  rtp_events_module = prefs_register_protocol (proto_rtp_events, NULL);

  prefs_register_obsolete_preference(rtp_events_module, "event_payload_type_value");

  prefs_register_obsolete_preference(rtp_events_module, "cisco_nse_payload_type_value");

  rtp_events_handle = register_dissector("rtpevent", dissect_rtp_events, proto_rtp_events);

  rtp_event_tap = register_tap("rtpevent");

}

void

proto_reg_handoff_rtp_events(void)

{

  dissector_add_string("rtp_dyn_payload_type", "telephone-event", rtp_events_handle);

  dissector_add_string("rtp_dyn_payload_type", "X-NSE", rtp_events_handle);

  dissector_add_uint_range_with_preference("rtp.pt", RTP_EVENT_DEFAULT_PT_RANGE, rtp_events_handle);

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local variables:

 * c-basic-offset: 8

 * tab-width: 8

 * indent-tabs-mode: t

 * End:

 *

 * vi: set shiftwidth=8 tabstop=8 noexpandtab:

 * :indentSize=8:tabSize=8:noTabs=false:

 */