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wireshark/epan/dissectors/packet-ptpip.c

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/* packet-ptpip.c
* Routines for PTP/IP (Picture Transfer Protocol) packet dissection
* 0xBismarck 2013
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/**
* References:
* [1] CIPA DC-X005-2005 - PTP-IP
* [2] BS ISO 15740:2008 - Photography Electronic still picture imaging - Picture transfer protocol (PTP)
* for digital still photography devices
* [3] gPhoto's Reversed Engineered PTP/IP documentation - http://gphoto.sourceforge.net/doc/ptpip.php
* [4] gPhoto's ptp2 header file https://gphoto.svn.sourceforge.net/svnroot/gphoto/trunk/libgphoto2/camlibs/ptp2/ptp.h
*
* @todo: This is being written as 1 dissector when in reality there is PTP/IP and PTP. Future work should include splitting this into 2
* so that the PTP layer may be used again for PTP/USB.
*/
#include "packet-ptpip.h"
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
/*Define*/
#define PTPIP_PORT 15740 /*[1] Section 2.2.3.1*/
#define PTPIP_GUID_SIZE 16 /*[1] Section 2.3.1*/
#define PTPIP_MAX_PARAM_COUNT 5 /*[1] Section 2.3.6*/
/*trees*/
static gint ett_ptpIP = -1;
static gint ett_ptpIP_hdr = -1;
/*PTP/IP Fields*/
static int proto_ptpIP = -1;
static int hf_ptpIP_len = -1; /*[1] Section 2.3*/
static int hf_ptpIP_pktType = -1; /*[1] Section 2.3*/
static int hf_ptpIP_guid = -1;
static int hf_ptpIP_name = -1;
static int hf_ptpIP_version = -1;
static int hf_ptpIP_connectionNumber = -1;
static int hf_ptpIP_dataPhaseInfo = -1;
/*note: separating the fields to make it easier to divide this code later.*/
/*PTP Fields*/
/*picking hf_ptp for now. Might need to change later for namespace issues with Precision Time Protocol.*/
static int hf_ptp_opCode = -1;
static int hf_ptp_respCode = -1;
static int hf_ptp_eventCode = -1;
static int hf_ptp_transactionID = -1;
static int hf_ptp_totalDataLength = -1;
static int hf_ptp_opCode_param_sessionID = -1;
/* function declarations */
static int dissect_ptpIP (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_);
void dissect_ptpIP_init_command_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_init_command_ack(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_init_event_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_init_event_ack(packet_info *pinfo);
void dissect_ptpIP_operation_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_operation_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_start_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_end_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_event(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_unicode_name(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_protocol_version(tvbuff_t *tvb, proto_tree *tree, guint16 *offset);
void dissect_ptpIP_guid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset);
void proto_register_ptpip( void );
void proto_reg_handoff_ptpIP( void );
/*String Names of packet types [3] & [4]*/
/* PTP/IP definitions*/
/*enums reformatted from [4]*/
typedef enum {
PTPIP_INVALID = 0,
PTPIP_INIT_COMMAND_REQUEST = 1,
PTPIP_INIT_COMMAND_ACK = 2,
PTPIP_INIT_EVENT_REQUEST = 3,
PTPIP_INIT_EVENT_ACK = 4,
PTPIP_INIT_FAIL = 5,
PTPIP_CMD_REQUEST = 6, /*possibly Operation request in [1] 2.3.6 agrees with [3]*/
PTPIP_CMD_RESPONSE = 7, /*possibly Operation response in [1] 2.3.7 agrees with [3]*/
PTPIP_EVENT = 8,
PTPIP_START_DATA_PACKET = 9,
PTPIP_DATA_PACKET = 10,
PTPIP_CANCEL_TRANSACTION = 11,
PTPIP_END_DATA_PACKET = 12,
PTPIP_PING = 13, /*possibly Probe Request in [1] 2.3.13*/
PTPIP_PONG = 14 /*possibly Probe Response in [1] 2.3.14*/
} ptpip_pktType;
/*Unless otherwise stated, names are based on info in [3]*/
static const value_string ptpip_pktType_names[] = {
{ PTPIP_INIT_COMMAND_REQUEST, "Init Command Request Packet" },
{ PTPIP_INIT_COMMAND_ACK, "Init Command ACK Packet" },
{ PTPIP_INIT_EVENT_REQUEST, "Init Event Request Packet" },
{ PTPIP_INIT_EVENT_ACK, "Init Event Ack Packet"},
{ PTPIP_INIT_FAIL, "Init Fail Packet"},
{ PTPIP_CMD_REQUEST, "Operation Request Packet"}, /* string based on [1]*/
{ PTPIP_CMD_RESPONSE, "Operation Response Packet"}, /*string based on [1]*/
{ PTPIP_EVENT, "Event Packet"},
{ PTPIP_START_DATA_PACKET, "Start Data Packet"},
{ PTPIP_DATA_PACKET, "Data Packet"},
{ PTPIP_CANCEL_TRANSACTION, "Cancel Packet"},
{ PTPIP_END_DATA_PACKET, "End Data Packet"},
{ PTPIP_PING, "Probe Request Packet"}, /* string based on [1]*/
{ PTPIP_PONG, "Probe Response Packet"}, /* string based on [1]*/
{ PTPIP_INVALID, "Invalid" },
{ 0, NULL }
};
/**
* Primary method to dissect a PTP/IP packet. When a subtype is encounter,
* the method will call a subdissector.
*/
static
int dissect_ptpIP (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_item *item_ptr;
proto_tree *ptp_tree;
guint16 offset = 0;
guint32 pktType;
/* Check that there's enough data */
if ( tvb_length_remaining(tvb, offset) < 8 ) /* ptp-photo smallest packet size is 8 */
return (0);
col_set_str(pinfo->cinfo,COL_PROTOCOL, "PTP/IP");
col_set_str(
pinfo->cinfo,
COL_INFO,
"Picture Transfer Protocol");
item_ptr = proto_tree_add_protocol_format(tree, proto_ptpIP, tvb, offset,
-1, "Picture Transfer Protocol");
/*creating the tree*/
ptp_tree = proto_item_add_subtree(item_ptr, ett_ptpIP);
/*[1] Defines first 2 fields as length and packet type. (Section 2.3)
* Also note: the standard lists all multibyte values in PTP-IP as little-endian
*/
/* note: len field size included in total len*/
proto_tree_add_item(ptp_tree, hf_ptpIP_len, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset+=4;
/*@todo:maybe add some length verification checks to see if len advertised matches actual len*/
pktType = tvb_get_letohl(tvb, offset);
proto_tree_add_item(ptp_tree, hf_ptpIP_pktType, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset+=4;
switch (pktType) {
case PTPIP_INIT_COMMAND_REQUEST:
dissect_ptpIP_init_command_request(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_INIT_COMMAND_ACK:
dissect_ptpIP_init_command_ack(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_INIT_EVENT_REQUEST:
dissect_ptpIP_init_event_request(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_INIT_EVENT_ACK:
dissect_ptpIP_init_event_ack(pinfo);
break;
case PTPIP_CMD_REQUEST:
dissect_ptpIP_operation_request(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_CMD_RESPONSE:
dissect_ptpIP_operation_response(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_EVENT:
dissect_ptpIP_event(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_START_DATA_PACKET:
dissect_ptpIP_start_data(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_DATA_PACKET:
dissect_ptpIP_data(tvb, pinfo, ptp_tree, &offset);
break;
case PTPIP_END_DATA_PACKET:
dissect_ptpIP_end_data(tvb, pinfo, ptp_tree, &offset);
break;
default:
break;
}
return (offset);
}
/**
* Method to dissect the Init Command Request sent by the Initiator
* in the connection. This packet is defined by [1] Section 2.3.1
*/
void dissect_ptpIP_init_command_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
*offset+=0;
col_set_str(
pinfo->cinfo,
COL_INFO,
"Init Command Request");
dissect_ptpIP_guid(tvb, pinfo, tree, offset);
/*grabbing the name*/
dissect_ptpIP_unicode_name(tvb, pinfo, tree, offset);
/*grabbing protocol version
* Note: [3] does not list this in the packet field. . [1] 2.3.1 states its the last 4
* bytes of the packet.
*/
dissect_ptpIP_protocol_version(tvb, tree, offset);
return;
}
/**
* Method to dissect the Init Command Ack sent by the Responder
* in the connection. This packet is defined by [1] Section 2.3.2
*/
void dissect_ptpIP_init_command_ack(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint32 connectionNumber;
col_set_str(
pinfo->cinfo,
COL_INFO,
"Init Command Ack");
/*Grabbing the Connection Number*/
connectionNumber = tvb_get_letohl(tvb, *offset);
proto_tree_add_item(tree, hf_ptpIP_connectionNumber, tvb, *offset, 4,ENC_LITTLE_ENDIAN);
col_append_fstr(
pinfo->cinfo,
COL_INFO,
" Connection #:%u",
connectionNumber);
*offset+=4;
dissect_ptpIP_guid(tvb, pinfo, tree, offset);
/*grabbing name*/
dissect_ptpIP_unicode_name(tvb,pinfo, tree, offset);
/*grabbing protocol version. Note: like in the Init Command Request, [3] doesn't mention
* this field, but [1] Section 2.3.2 does.
*/
dissect_ptpIP_protocol_version(tvb, tree, offset);
}
/**
* Dissects the Init Event Request packet specified in [1] Section 2.3.3.
* Standard states that the packet only has 1 field.
*/
void dissect_ptpIP_init_event_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint32 connectionNumber;
col_set_str(
pinfo->cinfo,
COL_INFO,
"Init Event Request");
/*Grabbing the Connection Number*/
connectionNumber = tvb_get_letohl(tvb, *offset);
proto_tree_add_item(tree, hf_ptpIP_connectionNumber, tvb, *offset, 4,ENC_LITTLE_ENDIAN);
col_append_fstr(
pinfo->cinfo,
COL_INFO,
" Connection #:%u",
connectionNumber);
*offset+=4;
}
/**
* Dissects the Init Event Ack packet specified in [1] Section 2.3.4
*/
void dissect_ptpIP_init_event_ack(packet_info *pinfo)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"Init Event Ack");
/*packet has no payload.*/
}
/**
* Dissects the Operation Request Packet specified in [1] Section 2.3.6
* Note: many of the fields in this packet move from PTP/IP to PTP layer
* of the stack. Work will need to be done in future iterations to make this
* compatible with PTP/USB.
*/
void dissect_ptpIP_operation_request(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint16 opcode=0;
guint16 transactionID_offset = *offset; /*need to save this to output transaction id in pinfo*/
col_set_str(
pinfo->cinfo,
COL_INFO,
"Operation Request Packet ");
proto_tree_add_item(tree,hf_ptpIP_dataPhaseInfo, tvb, *offset, 4, ENC_LITTLE_ENDIAN);
*offset+= 4;
opcode = tvb_get_letohs(tvb, *offset);
proto_tree_add_item(tree, hf_ptp_opCode, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
*offset+= 2;
transactionID_offset = *offset; /*we'll dissect the transactionID later because opcode handling erases the column*/
*offset+= 4;
/*carving out the parameters. [1] 2.3.6 states there can be at most 5. Params are defined in [2] 10.1 & 10.4*/
switch (opcode)
{
case PTP_OC_GetDeviceInfo:
/*[1] 10.5.1*/
col_set_str(
pinfo->cinfo,
COL_INFO,
"GetDeviceInfo");
/*No parameters*/
break;
case PTP_OC_OpenSession:
dissect_ptp_opCode_openSession(tvb, pinfo, tree, offset);
break;
case PTP_OC_CloseSession:
/*[1] 10.5.3*/
col_set_str(
pinfo->cinfo,
COL_INFO,
"CloseSession");
/*No parameters*/
break;
case PTP_OC_GetStorageIDs:
/*[2] 10.5.4*/
col_set_str(
pinfo->cinfo,
COL_INFO,
"GetStorageIDs");
/*states data is a storage array. Needs eventual investigation.*/
break;
default:
break;
}
dissect_ptp_transactionID(tvb, pinfo, tree, &transactionID_offset);
}
/**
* Dissects the Operation Response Packet specified in [1] Section 2.3.7
* Note: many of the fields in this packet move from PTP/IP to PTP layer
* of the stack. Work will need to be done in future iterations to make this
* compatible with PTP/USB.
*/
void dissect_ptpIP_operation_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"Operation Response Packet ");
proto_tree_add_item(tree, hf_ptp_respCode, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
*offset+= 2;
dissect_ptp_transactionID(tvb, pinfo, tree, offset);
}
/**
* Dissects the Event Packet specified in [1] Section 2.3.8
* Note: many of the fields in this packet move from PTP/IP to PTP layer
* of the stack. Work will need to be done in future iterations to make this
* compatible with PTP/USB.
*/
void dissect_ptpIP_event(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"Event Packet ");
proto_tree_add_item(tree, hf_ptp_eventCode, tvb, *offset, 2, ENC_LITTLE_ENDIAN);
*offset+= 2;
dissect_ptp_transactionID(tvb, pinfo, tree, offset);
}
/**
* Dissects the Event Packet specified in [1] Section 2.3.9
* Note: many of the fields in this packet move from PTP/IP to PTP layer
* of the stack. Work will need to be done in future iterations to make this
* compatible with PTP/USB.
*/
void dissect_ptpIP_start_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint64 dataLen=0;
col_set_str(
pinfo->cinfo,
COL_INFO,
"Start Data Packet ");
dissect_ptp_transactionID(tvb, pinfo, tree, offset);
dataLen = tvb_get_letoh64(tvb, *offset);
proto_tree_add_item(tree, hf_ptp_totalDataLength, tvb, *offset, 8, ENC_LITTLE_ENDIAN);
*offset+= 8;
if(dataLen == G_GUINT64_CONSTANT(0xFFFFFFFFFFFFFFFF)) /*[1] specifies in 2.3.9 if total data len this value then len unknown*/
{
col_append_str(
pinfo->cinfo,
COL_INFO,
" Data Length Unknown");
}
}
void dissect_ptpIP_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"Data Packet ");
dissect_ptp_transactionID(tvb, pinfo, tree, offset);
}
/**
* Dissects the End Data specified in [1] Section 2.3.11
* Note: many of the fields in this packet move from PTP/IP to PTP layer
* of the stack. Work will need to be done in future iterations to make this
* compatible with PTP/USB.
*/
void dissect_ptpIP_end_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"End Data Packet ");
dissect_ptp_transactionID(tvb, pinfo, tree, offset);
}
/**
* Dissects the Opcode Open Session as defined by [2] 10.5.2
*/
void dissect_ptp_opCode_openSession(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
col_set_str(
pinfo->cinfo,
COL_INFO,
"OpenSession");
proto_tree_add_item(tree, hf_ptp_opCode_param_sessionID, tvb, *offset, 4 , ENC_LITTLE_ENDIAN);
*offset+= 4;
}
/**
* The transaction ID is defined in [2] 9.3.1
* and used in multiple message types. This method handles
* parsing the field and adding the value to the info
* column.
*
*/
void dissect_ptp_transactionID(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint32 transactionID;
transactionID = tvb_get_letohl(tvb, *offset);
proto_tree_add_item(tree, hf_ptp_transactionID, tvb, *offset, 4, ENC_LITTLE_ENDIAN);
*offset+= 4;
col_append_fstr(
pinfo->cinfo,
COL_INFO,
" Transaction ID: %d",
transactionID);
}
/**
* This method handles dissecting the Unicode name that is
* specificed in multiple packets.
*/
void dissect_ptpIP_unicode_name(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint8 *name;
gint nameLen;
nameLen = tvb_unicode_strsize(tvb, *offset);
name = tvb_get_unicode_string(wmem_packet_scope(), tvb, *offset, nameLen, ENC_LITTLE_ENDIAN);
proto_tree_add_unicode_string(tree, hf_ptpIP_name, tvb, *offset, nameLen, name);
*offset+=nameLen;
col_append_fstr(
pinfo->cinfo,
COL_INFO,
" Name: %s",
name);
}
/** Method dissects the protocol version from the packets.
* Additional note, section 3 of [1] defines the Binary Protocol version
* as 0x00010000 == 1.0 where the Most significant bits are the major version and the least
* significant bits are the minor version.
*/
void dissect_ptpIP_protocol_version(tvbuff_t *tvb, proto_tree *tree, guint16 *offset)
{
guint8 version[30];
guint32 protoVersion;
guint16 majorVersion, minorVersion;
protoVersion = tvb_get_letohl(tvb, *offset);
/*logic to format version*/
minorVersion = protoVersion & 0xFFFF;
majorVersion = (protoVersion & 0xFFFF0000) >>16;
g_snprintf(version, 30, "%u.%u", majorVersion, minorVersion);
proto_tree_add_string(tree, hf_ptpIP_version, tvb, *offset, 4, version);
*offset += 4;
}
/*Grabbing the GUID*/
void dissect_ptpIP_guid(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint16 *offset)
{
guint8 *guid;
guid = tvb_bytes_to_str(tvb, *offset, PTPIP_GUID_SIZE);
proto_tree_add_item(tree, hf_ptpIP_guid, tvb, *offset, PTPIP_GUID_SIZE, ENC_NA);
*offset += PTPIP_GUID_SIZE;
col_append_fstr(
pinfo->cinfo,
COL_INFO,
" GUID: %s",
guid);
}
void proto_register_ptpip( void )
{
static hf_register_info hf[] = {
/*PTP/IP layer*/
{ &hf_ptpIP_len, {
"Length", "ptpip.len", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_ptpIP_pktType, {
"Packet Type", "ptpip.pktType", FT_UINT32, BASE_HEX,
VALS(ptpip_pktType_names), 0, NULL, HFILL }},
{ &hf_ptpIP_guid, {
"GUID", "ptpip.guid", FT_BYTES, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_ptpIP_name, {
"Host Name", "ptpip.name", FT_STRINGZ, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_ptpIP_version, {
"Version", "ptpip.version", FT_STRING, BASE_NONE,
NULL, 0, NULL, HFILL }},
{ &hf_ptpIP_connectionNumber, {
"Connection Number", "ptpip.connection", FT_UINT32, BASE_DEC,
NULL, 0, NULL, HFILL }},
{ &hf_ptpIP_dataPhaseInfo, {
"Data Phase Info", "ptpip.phaseinfo", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }},
/*PTP layer*/
/*leaving names with "ptpip" to try and prevent namespace issues. probably changing later.*/
{ &hf_ptp_opCode, {
"Operation Code", "ptpip.opcode", FT_UINT16, BASE_HEX,
VALS(ptp_opcode_names), 0, NULL, HFILL }},
{ &hf_ptp_respCode, {
"Response Code", "ptpip.respcode", FT_UINT16, BASE_HEX,
VALS(ptp_respcode_names), 0, NULL, HFILL }},
{ &hf_ptp_eventCode, {
"Event Code", "ptpip.eventcode", FT_UINT16, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_ptp_transactionID, {
"Transaction ID", "ptpip.transactionID", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_ptp_totalDataLength, {
"Total Data Length", "ptpip.datalen", FT_UINT64, BASE_DEC_HEX,
NULL, 0, NULL, HFILL }},
{ &hf_ptp_opCode_param_sessionID, {
"Session ID", "ptpip.opcode.param.sessionid", FT_UINT32, BASE_HEX,
NULL, 0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_ptpIP,
&ett_ptpIP_hdr
};
proto_ptpIP = proto_register_protocol("Picture Transfer Protocol Over IP", "PTP/IP", "ptpip");
proto_register_field_array(proto_ptpIP, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void proto_reg_handoff_ptpIP( void ) {
dissector_handle_t ptpIP_handle;
/* Use new_create_dissector_handle() to indicate that dissect_wol()
* returns the number of bytes it dissected (or 0 if it thinks the packet
* does not belong to PROTONAME).
*/
ptpIP_handle = new_create_dissector_handle(dissect_ptpIP, proto_ptpIP);
dissector_add_uint("tcp.port", PTPIP_PORT, ptpIP_handle);
}
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