/* packet-pnrp.h
 * Routines for Peer Name Resolution Protocol (PNRP) dissection  
 *
 *  Copyright 2010, Jan Gerbecks <jan.gerbecks@stud.uni-due.de>
 *
 * $Id: packet-pnrp.c 31734 2010-01-29 21:53:58Z wmeier $
 *
 * 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.
 */

/* The official Dokumentation for the Peer Name Resolution Protocol can be found at
 http://msdn.microsoft.com/en-us/library/cc239047(PROT.13).aspx
 This dissector is based on Revision 6.1.2 
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <glib.h>

#include <epan/packet.h>

#define PROTONAME "Peer Network Resolution Protocol"
#define PROTOSHORTNAME "PNRP"
#define PROTOABBREV "pnrp"

#define PNRP_PORT 3540

#define FIELDID_LENGTH = 2
#define LENGTH_FIELD = 2

/* Define all FieldIDs here, so we can use them later on in switch statement etc */
#define PNRP_HEADER			0x0010
#define PNRP_HEADER_ACKED	0x0018
#define PNRP_ID				0x0030
#define TARGET_PNRP_ID		0x0038
#define VALIDATE_PNRP_ID	0x0039
#define FLAGS_FIELD			0x0040
#define FLOOD_CONTROLS		0x0043
#define SOLICIT_CONTROLS	0x0044
#define LOOKUP_CONTROLS		0x0045
#define EXTENDED_PAYLOAD	0x005A
#define PNRP_ID_ARRAY		0x0060
#define CERT_CHAIN			0x0080
#define WCHAR				0x0084
#define CLASSIFIER			0x0085
#define HASHED_NONCE		0x0092
#define NONCE				0x0093
#define SPLIT_CONTROLS		0x0098
#define ROUTING_ENTRY		0x009A
#define VALIDATE_CPA		0x009B
#define REVOKE_CPA			0x009C
#define IPV6_ENDPOINT		0x009D
#define IPV6_ENDPOINT_ARRAY 0x009E

/* Define all message types */
#define SOLICIT				0x01
#define ADVERTISE			0x02
#define REQUEST				0x03
#define FLOOD				0x04
#define INQUIRE				0x07
#define AUTHORITY			0x08
#define ACK					0x09
#define LOOKUP				0x0B

/* Define flags mask fields */
#define FLAGS_INQUIRE_RESERVED1 0xFFE0
#define FLAGS_INQUIRE_A 0x0010
#define FLAGS_INQUIRE_X 0x0008
#define FLAGS_INQUIRE_C 0x0004
#define FLAGS_INQUIRE_RESERVED2 0x0003

#define FLAGS_AUTHORITY_RESERVED1 0xFC00
#define FLAGS_AUTHORITY_L 0x0200
#define FLAGS_AUTHORITY_RESERVED2 0x01F0
#define FLAGS_AUTHORITY_B 0x0008
#define FLAGS_AUTHORITY_RESERVED3 0x0006
#define FLAGS_AUTHORITY_N 0x0001

#define FLAGS_LOOKUPCONTROLS_RESERVED 0xFFFC
#define FLAGS_LOOKUPCONTROLS_A 0x0002
#define FLAGS_LOOKUPCONTROLS_0 0x0001

#define FLAGS_ENCODED_CPA_RESERVED 0xC0
#define FLAGS_ENCODED_CPA_X 0x20
#define FLAGS_ENCODED_CPA_U 0x02
#define FLAGS_ENCODED_CPA_R 0x01
#define FLAGS_ENCODED_CPA_A 0x04
#define FLAGS_ENCODED_CPA_C 0x08
#define FLAGS_ENCODED_CPA_F 0x10

/* Define all helper methods  */
static void dissect_pnrp_ids(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_ipv6_address(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_route_entry(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_ipv6_endpoint_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_encodedCPA_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_payload_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_publicKey_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);
static void dissect_signature_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree);

/* Define global variables 
 ----------------------------*/
static int proto_pnrp = -1;

/* Define FieldIDs */
static const value_string fieldID[] = {
	{ PNRP_HEADER, "PNRP_HEADER" },
	{ PNRP_HEADER_ACKED, "PNRP_HEADER_ACKED" },
	{ PNRP_ID, "PNRP_ID" },
	{ TARGET_PNRP_ID, "TARGET_PNRP_ID" },
	{ VALIDATE_PNRP_ID, "VALIDATE_PNRP_ID" },
	{ FLAGS_FIELD, "FLAGS_FIELD" },
	{ FLOOD_CONTROLS, "FLOOD_CONTROLS" },
	{ SOLICIT_CONTROLS, "SOLICIT_CONTROLS" },
	{ LOOKUP_CONTROLS, "LOOKUP_CONTROLS" },
	{ EXTENDED_PAYLOAD, "EXTENDED_PAYLOAD" },
	{ PNRP_ID_ARRAY, "PNRP_ID_ARRAY" },
	{ CERT_CHAIN, "CERT_CHAIN" },
	{ WCHAR, "WCHAR" },
	{ CLASSIFIER, "CLASSIFIER" },
	{ HASHED_NONCE, "HASHED_NONCE" },
	{ NONCE, "NONCE" },
	{ SPLIT_CONTROLS, "SPLIT_CONTROLS" },
	{ ROUTING_ENTRY, "ROUTING_ENTRY" },
	{ VALIDATE_CPA, "VALIDATE_CPA" },
	{ REVOKE_CPA, "REVOKE_CPA" },
	{ IPV6_ENDPOINT, "IPV6_ENDPOINT" },
	{ IPV6_ENDPOINT_ARRAY, "IPV6_ENDPOINT_ARRAY" },
	{0,						NULL}
};

/* Define Packetnames */
static const value_string messageType[] = {
	{ SOLICIT, "SOLICIT" },
	{ ADVERTISE, "ADVERTISE" },
	{ REQUEST, "REQUEST" },
	{ FLOOD, "FLOOD" },
	{ INQUIRE, "INQUIRE" },
	{ AUTHORITY, "AUTHORITY" },
	{ ACK, "ACK" },
	{ LOOKUP, "LOOKUP" },
	{0,						NULL}
};
/* Define Solicit Type */
static const value_string solicitType[] = {
	{ 0x00, "SOLICIT_TYPE_ANY" },
	{ 0x01, "SOLICIT_TYPE_LOCAL" },
	{0,						NULL}
};
/* Define Resolve Criteria for Lookup Controls */
static const value_string resolveCriteria[] = {
	{ 0x00, "SEARCH_OPCODE_NONE" },
	{ 0x01, "SEARCH_OPCODE_ANY_PEERNAME" },
	{ 0x02, "SEARCH_OPCODE_NEAREST_PEERNAME" },
	{ 0x04, "SEARCH_OPCODE_NEAREST64_PEERNAME" },
	{ 0x08, "SEARCH_OPCODE_UPPER_BITS" },
	{0,						NULL}
};
/* Define Reason Code for Lookup Controls */
static const value_string reasonCode[] = {
	{ 0x00, "REASON_APP_REQUEST" },
	{ 0x01, "REASON_REGISTRATION" },
	{ 0x02, "REASON_CACHE_MAINTENANCE" },
	{ 0x03, "REASON_SPLIT_DETECTION" },
	{0,						NULL}
};

/* Define IDs for subcomponents */
/* Message Header */
static gint hf_pnrp_header = -1;
static gint hf_pnrp_header_fieldID = -1;
static gint hf_pnrp_header_length = -1;
static gint hf_pnrp_header_ident = -1;
static gint hf_pnrp_header_versionMajor = -1;
static gint hf_pnrp_header_versionMinor = -1;
static gint hf_pnrp_header_messageType = -1;
static gint hf_pnrp_header_messageID = -1;
/* Message Body */
static gint hf_pnrp_message_type = -1;
static gint hf_pnrp_message_length = -1;
static gint hf_pnrp_message_headerack = -1;
static gint hf_pnrp_message_pnrpID = -1;	/* Generic variable to display pnrp ID in various situations */
/* Inquire Message Flags */
static gint hf_pnrp_message_inquire_flags = -1;
static gint hf_pnrp_message_inquire_flags_reserved1 = -1;
static gint hf_pnrp_message_inquire_flags_Abit = -1;
static gint hf_pnrp_message_inquire_flags_Xbit = -1;
static gint hf_pnrp_message_inquire_flags_Cbit = -1;
static gint hf_pnrp_message_inquire_flags_reserved2 = -1;

static const int *inquire_flags[] = {
	&hf_pnrp_message_inquire_flags_reserved1,
	&hf_pnrp_message_inquire_flags_Abit,
	&hf_pnrp_message_inquire_flags_Xbit,
	&hf_pnrp_message_inquire_flags_Cbit,
	&hf_pnrp_message_inquire_flags_reserved2,
	NULL
};

/* Classifier */
static gint hf_pnrp_message_classifier_unicodeCount = -1;
static gint hf_pnrp_message_classifier_arrayLength = -1;
static gint hf_pnrp_message_classifier_entryLength = -1;
/* ACK Message Flags */
static gint hf_pnrp_message_ack_flags_reserved = -1;
static gint hf_pnrp_message_ack_flags_Nbit = -1;
/* SplitControls */
static gint hf_pnrp_message_splitControls_authorityBuffer = -1;
/* IPv6 Endpoint Array */
static gint hf_pnrp_message_ipv6EndpointArray_NumberOfEntries = -1;
static gint hf_pnrp_message_ipv6EndpointArray_ArrayLength = -1;
static gint hf_pnrp_message_ipv6EndpointArray_EntryLength = -1;
/* AUTHORITY Message Flags */
static gint hf_pnrp_message_authority_flags = -1;
static gint hf_pnrp_message_authority_flags_reserved1 = -1;
static gint hf_pnrp_message_authority_flags_Lbit = -1;
static gint hf_pnrp_message_authority_flags_reserved2 = -1;
static gint hf_pnrp_message_authority_flags_Bbit = -1;
static gint hf_pnrp_message_authority_flags_reserved3= -1;
static gint hf_pnrp_message_authority_flags_Nbit = -1;

static const int *authority_flags[] = {
	&hf_pnrp_message_authority_flags_reserved1,
	&hf_pnrp_message_authority_flags_Lbit,
	&hf_pnrp_message_authority_flags_reserved2,
	&hf_pnrp_message_authority_flags_Bbit,
	&hf_pnrp_message_authority_flags_reserved3,
	&hf_pnrp_message_authority_flags_Nbit,
	NULL
};

/* Flood Control Flags */
static gint hf_pnrp_message_flood_flags_reserved1 = -1;
static gint hf_pnrp_message_flood_flags_Dbit = -1;

/* PNRP ID Array */
static gint hf_pnrp_message_idArray_NumEntries = -1;
static gint hf_pnrp_message_idArray_Length = -1;
static gint hf_pnrp_message_ElementFieldType = -1;
static gint hf_pnrp_message_idarray_Entrylength = -1;

static gint hf_pnrp_message_solicitType = -1;
static gint hf_pnrp_message_certChain = -1;
static gint hf_pnrp_message_nonce = -1;
static gint hf_pnrp_message_hashednonce = -1;
static gint hf_pnrp_message_ipv6 = -1;

/* Encoded CPA */
static gint hf_pnrp_encodedCPA = -1;
static gint hf_pnrp_encodedCPA_length = -1;
static gint hf_pnrp_encodedCPA_minorVersion = -1;
static gint hf_pnrp_encodedCPA_majorVersion = -1;
static gint hf_pnrp_encodedCPA_flags = -1;
static gint hf_pnrp_encodedCPA_flags_reserved = -1;
static gint hf_pnrp_encodedCPA_flags_Xbit = -1;
static gint hf_pnrp_encodedCPA_flags_Fbit = -1;
static gint hf_pnrp_encodedCPA_flags_Cbit = -1;
static gint hf_pnrp_encodedCPA_flags_Abit = -1;
static gint hf_pnrp_encodedCPA_flags_Ubit = -1;
static gint hf_pnrp_encodedCPA_flags_Rbit = -1;
static const int *encodedCPA_flags[] = {
	&hf_pnrp_encodedCPA_flags_reserved,
	&hf_pnrp_encodedCPA_flags_Xbit,
	&hf_pnrp_encodedCPA_flags_Fbit,
	&hf_pnrp_encodedCPA_flags_Cbit,
	&hf_pnrp_encodedCPA_flags_Abit,
	&hf_pnrp_encodedCPA_flags_Ubit,
	&hf_pnrp_encodedCPA_flags_Rbit,
	NULL
};
static gint hf_pnrp_encodedCPA_notAfter = -1;
static gint hf_pnrp_encodedCPA_serviceLocation = -1;
static gint hf_pnrp_encodedCPA_binaryAuthority = -1;
static gint hf_pnrp_encodedCPA_classifiertHash = -1;
static gint hf_pnrp_encodedCPA_friendlyName = -1;

/* Lookup Controls */
static gint hf_pnrp_message_lookupControls_flags = -1;
static gint hf_pnrp_message_lookupControls_flags_reserved = -1;
static gint hf_pnrp_message_lookupControls_flags_Abit = -1;
static gint hf_pnrp_message_lookupControls_flags_0bit = -1;
static const int *lookupControls_flags[] = {
	&hf_pnrp_message_lookupControls_flags_reserved,
	&hf_pnrp_message_lookupControls_flags_Abit,
	&hf_pnrp_message_lookupControls_flags_0bit,
	NULL
};
static gint hf_pnrp_message_lookupControls_precision =-1;
static gint hf_pnrp_message_lookupControls_resolveCriteria =-1;
static gint hf_pnrp_message_lookupControls_reasonCode =-1;

/* Dissect Route Entry */
static gint hf_pnrp_message_routeEntry_portNumber = -1;
static gint hf_pnrp_message_routeEntry_flags = -1;
static gint hf_pnrp_message_routeEntry_addressCount = -1;

/* Public Key Structure */
static gint hf_pnrp_publicKey_objID = -1;
static gint hf_pnrp_publicKey_publicKeyData = -1;

/* Signature Structure */
static gint hf_pnrp_signature_signatureData = -1;

/* Define variables to reference subtrees */
static gint ett_pnrp = -1;
static gint ett_pnrp_message = -1;
static gint ett_pnrp_message_inquire_flags = -1;
static gint ett_pnrp_message_authority_flags = -1;
static gint ett_pnrp_message_encodedCPA = -1;
static gint ett_pnrp_message_encodedCPA_flags = -1;
static gint ett_pnrp_message_lookupControls_flags = -1;
static gint ett_pnrp_message_payloadStructure = -1;
static gint ett_pnrp_message_publicKeyStructure = -1;
static gint ett_pnrp_message_signatureStructure = -1;


/* Do actual dissection work */
static int dissect_pnrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	/* Variable declaration */
	gint offset;
	gint padding_bytes;
	guint8 message_type;
	guint16 field_type;
	guint16 data_length;

	
	/*----------------------------------------
	 * Validate if it is really a PNRP Packet
	 *----------------------------------------*/
	/* Check that there's enough data */
	/* XXX: ISTR that tvb_length should be used when     */
	/*      initially checking for a valid packet for a  */
	/*      new style dissector.                         */
	/*      ToDo: confirm                                */
	data_length = tvb_reported_length(tvb);
	
	/* Shortest Message is ACK -> 12 Bytes for Header plus 8 Bytes for Data */
	if (data_length <  12+8 )
	{
		return 0;
	}
	
	/* Check some values from the packet header */
	/* First 2 bytes must be 0x0010 */
	if (tvb_get_ntohs(tvb,0) != PNRP_HEADER )
	{
		return 0;
	}
	/* Length of Header must be 0x000C = 12 */
	if (tvb_get_ntohs(tvb,2) != 0x000C) {
		return 0;
	}
	/* Identifier must 0x51 */
	if (tvb_get_guint8(tvb,4) != 0x51) {
		return 0;
	}

	
	/* Assign Values to Variables */
	/* Use to track data */
	offset= 0;
	padding_bytes = 0;
	/* Get the message Information beforehand */
	message_type = tvb_get_guint8(tvb,7);
	
	
	/* Simply Display the Protcol Name in the INFO column */
	col_set_str(pinfo->cinfo, COL_PROTOCOL, "pnrp"); 
	/* Clear out stuff in the info column */ 
	col_add_fstr(pinfo->cinfo, COL_INFO, "PNRP %s Message ",
				 val_to_str(message_type, messageType, "Unknown (0x%02x)"));
	
	
	/* If tree is NULL we are asked for summary, otherwise for details */
	if(tree){ /* we are beeing asked for details */
		proto_item *ti = NULL;
		proto_tree *pnrp_tree = NULL;
		
		proto_item *pnrp_header_item = NULL;
		proto_tree *pnrp_header_tree = NULL;
		
		proto_item *pnrp_message_tree = NULL;
		proto_item *pnrp_message_item = NULL;
		
		
		/* Lets add a subtree to our dissection to display the info */
		ti = proto_tree_add_item(tree, proto_pnrp, tvb, 0, -1, FALSE);
		proto_item_append_text(ti, ", Message Type %s",
							   val_to_str(message_type, messageType, "Unknown (0x%02x)"));
		/* Get a main tree for the whole protocol */
		pnrp_tree = proto_item_add_subtree(ti, ett_pnrp);
		/*-------------------------------
		 *--Add all Header Fields
		 *------------------------------*/
		/* Get a subtree for the Header */
		pnrp_header_tree = proto_item_add_subtree(ti, ett_pnrp);
		pnrp_header_item = proto_tree_add_item(pnrp_tree, hf_pnrp_header, tvb, offset,12,FALSE);
		pnrp_header_tree = proto_item_add_subtree(pnrp_header_item, ett_pnrp);
		
		/* Add Field ID should be 0c0010 */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_fieldID,tvb,offset,2,FALSE);
		offset += 2;
		/* Add Length should be 0x000C */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_length,tvb,offset,2,FALSE);
		offset += 2;
		/* Add Ident should be 0x51 */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_ident,tvb,offset,1,FALSE);
		offset += 1;
		/* Add Major Version */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_versionMajor,tvb,offset,1,FALSE);
		offset += 1;
		/* Add Minor Version */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_versionMinor,tvb,offset,1,FALSE);
		offset += 1;
		/* Add Message Type */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_messageType,tvb,offset,1,FALSE);
		offset += 1;
		/* Add Message ID */
		proto_tree_add_item(pnrp_header_tree,hf_pnrp_header_messageID,tvb,offset,4,FALSE);
		offset += 4;
		
		
		/*-------------------------------
		 *--Add all Message Fields
		 *------------------------------*/
		
		/* The following part has dynamic length depending on message type */
		while (tvb_reported_length_remaining(tvb, offset) > 0) {
			/* Determine the Field Type */
			field_type = tvb_get_ntohs(tvb,offset );
			/* Determine length of this message */
			data_length = tvb_get_ntohs(tvb,offset + 2);
			
			/* Length must be at least 4, because field_type and data_length are part of data_length information */
			if (data_length < 4) {
				if (tree) {
					pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 4, "Message with invalid length %u (< 4)", data_length);
					pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
					proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset, 2, FALSE);
					proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
				}
				offset += 4;
				/* Don't continue parsing this message segment */
				break;
			}
			/* Actual Parsing of the message Type */
			switch (field_type) {
				/* First Field in ACK Message */
				case PNRP_HEADER_ACKED:
					if (tree) {						
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
						data_length, "Message ACK ID: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_headerack, tvb, offset + 4, data_length -4, FALSE);

					}
					offset += data_length;
					break;
				
					/* A validate pnrp id follows as found in FLOOD */
				case VALIDATE_PNRP_ID:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Validate PNRP ID: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* We can have a large number of pnrp IDs here */
						dissect_pnrp_ids(tvb,offset+4,data_length-4,pnrp_message_tree);
						
					}
					offset += data_length;
					break;
					 
					/* The Flags have different meaning, depending on the message */
				case FLAGS_FIELD:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Flags Field: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						switch (message_type) {
							case INQUIRE:
								proto_tree_add_bitmask(pnrp_message_tree, tvb, offset+4, hf_pnrp_message_inquire_flags, ett_pnrp_message_inquire_flags, inquire_flags, FALSE);
								proto_tree_add_text(pnrp_message_tree, tvb, offset + 6, 2, "Padding : %d - 2 Bytes",tvb_get_ntohs(tvb,offset+6));
								offset += data_length+2;

								break;
								
							case ACK:
								/* Reserved 0 - 14 bits */
								proto_tree_add_bits_item(pnrp_message_tree, hf_pnrp_message_ack_flags_reserved, tvb, (offset + 4)*8, 15, FALSE);
								/* N - Bit */
								proto_tree_add_bits_item(pnrp_message_tree, hf_pnrp_message_ack_flags_Nbit, tvb,((offset + 4)*8)+15, 1, FALSE);
								offset += data_length;
								break;
							case AUTHORITY:
								proto_tree_add_bitmask(pnrp_message_tree, tvb, offset+4, hf_pnrp_message_authority_flags, ett_pnrp_message_authority_flags, authority_flags, FALSE);
								/* Check if the Flags Field is the last message part. If so, no padding of 2 bytes is added */
								if(tvb_reported_length_remaining(tvb, offset+data_length)==0)
								{
									offset += data_length;
								}
								else {
									padding_bytes = 2;
									proto_tree_add_text(pnrp_message_tree, tvb, offset + 6, padding_bytes, "Padding: %d bytes", padding_bytes);
									offset += data_length+2;
								}
								break;
								

							default:
								proto_tree_add_text(pnrp_message_tree, tvb, offset + 4, data_length -4, "Flags");
								offset += data_length;
								break;
						}
						
					}
					
					break;
					
					/* Flood controls found in FLOOD Message */
				case FLOOD_CONTROLS:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Flood Control: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* Reserved 1 - 15 bits */
						proto_tree_add_bits_item(pnrp_message_tree, hf_pnrp_message_flood_flags_reserved1, tvb, (offset + 4)*8, 15, FALSE);
						/* D - Bit */
						proto_tree_add_bits_item(pnrp_message_tree, hf_pnrp_message_flood_flags_Dbit, tvb,((offset + 4)*8)+15, 1, FALSE);
						/* Reserved 2 */
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 6, 1, "Reserved 2: %d",tvb_get_guint8(tvb,offset+6));
						/* Padding 1 */
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 7, 1, "Padding: %d",tvb_get_guint8(tvb,offset+7));
					}
					
					offset += data_length+1;
					break;
					
					/* Solicit Controls found in SOLICIT Message */
				case SOLICIT_CONTROLS:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Solicit Controls: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 4, 1, "Reserved : %d",tvb_get_guint8(tvb,offset+4));
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_solicitType, tvb, offset + 5, 1, FALSE);
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 6, 2, "Reserved : %d",tvb_get_ntohs(tvb,offset+6));
					}
					offset += data_length +2;	/* Padding involved */
					break;
					/* Lookup controls found in LOOKUP Message */
				case LOOKUP_CONTROLS:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Lookup Control: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* 2 Bytes of Flags */
						proto_tree_add_bitmask(pnrp_message_tree, tvb, offset+4, hf_pnrp_message_lookupControls_flags, ett_pnrp_message_lookupControls_flags, lookupControls_flags, FALSE);
						/* Precision Bytes */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_lookupControls_precision, tvb, offset + 6, 2, FALSE);
						/* Resolve Criteria */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_lookupControls_resolveCriteria, tvb, offset + 8, 1, FALSE);
						/* Reason Code */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_lookupControls_reasonCode, tvb, offset + 9, 1, FALSE);
						/* Reserved */
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 10, 2, "Reserved : %d",tvb_get_ntohs(tvb,offset+10));
						
					}
					
					offset += data_length;
					break;
					/* Target PNRP ID found in Lookup Message */
				case TARGET_PNRP_ID:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Target PNRP ID: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						dissect_pnrp_ids(tvb, offset+4, data_length-4, pnrp_message_tree);
					}
					
					offset += data_length;
					break;

					/* Extended Payload found in AUTHORITY Message */
				case EXTENDED_PAYLOAD:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Extended Payload: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* TODO: Do actual parsing */
					}
					
					offset += data_length;
					break;
					/* Pnrp id Array as found in REQUEST & ADVERTISE Message */
				case PNRP_ID_ARRAY:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "PNRP ID Array: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_idArray_NumEntries, tvb, offset + 4, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_idArray_Length, tvb, offset + 6, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_ElementFieldType, tvb, offset + 8, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_idarray_Entrylength, tvb, offset + 10, 2, FALSE);
						dissect_pnrp_ids(tvb,offset+12,data_length-12,pnrp_message_tree);
					}
					
					offset += data_length;
					break;
					/* Cert Chain follows as found in AUTHORITY */
				case CERT_CHAIN:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "CERT Chain: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_certChain, tvb, offset + 4, data_length-4, FALSE);
					}
					
					/* There might be padding, so fill up to the next byte */
					padding_bytes = 0;
					while (data_length%4 != 0 &&tvb_reported_length_remaining(tvb, offset+data_length)>0) {
						data_length++;
						padding_bytes++;
					}
					/* Check if we actually had some padding bytes */
					if (0<padding_bytes) {
						proto_tree_add_text(pnrp_message_tree, tvb, offset + data_length-padding_bytes, padding_bytes, "Padding: %d bytes", padding_bytes);
					}
					offset += data_length;
					break;
					/* classifier: A classifier string follows as found in AUTHORITY */
				case CLASSIFIER:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Classifier: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* NumEntries */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_classifier_unicodeCount, tvb, offset + 4, 2, FALSE);
						/* Array Length: 8+(NumEntries*EntryLength */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_classifier_arrayLength, tvb, offset + 6, 2, FALSE);
						/* Element Field Type: WCHAR */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset+8 , 2, FALSE);
						/* Entry Length: Must be 0x0002 */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_classifier_entryLength, tvb, offset + 10, 2, FALSE);
						/* The actual classifier String */
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 12, tvb_get_ntohs(tvb,offset+6)-8, "Classifier: %s",tvb_get_ephemeral_faked_unicode(tvb, offset + 12, (tvb_get_ntohs(tvb,offset+6)-8)/2, FALSE));
					}
					
					/* There might be padding, so fill up to the next byte */
					padding_bytes = 0;
					while (data_length%4 != 0 &&tvb_reported_length_remaining(tvb, offset+data_length)>0) {
						data_length++;
						padding_bytes++;
					}
					/* Check if we actually had some padding bytes */
					if (0<padding_bytes) {
						proto_tree_add_text(pnrp_message_tree, tvb, offset + data_length-padding_bytes, padding_bytes, "Padding: %d bytes", padding_bytes);
					}
					offset += data_length;
					break;
					/* A hashed nonce follows as found in ADVERTISE & SOLICIT */
				case HASHED_NONCE:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Hashed Nonce: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_hashednonce, tvb, offset + 4, data_length-4, FALSE);
						
					}
					
					offset += data_length;
					break;
					
					/* A nonce follows as found in REQUEST & INQUIRE */
				case NONCE:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Nonce: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_nonce, tvb, offset + 4, data_length-4, FALSE);
					}
					
					offset += data_length;
					break;
					
					/* split controls as found in AUTHORITY */
				case SPLIT_CONTROLS:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Split controls: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* Size of Authority Buffer */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_splitControls_authorityBuffer, tvb, offset + 4, 2, FALSE);
						/* Byte offset */
						proto_tree_add_text(pnrp_message_tree, tvb, offset + 6, 2, "Offset : %d",tvb_get_ntohs(tvb,offset+6));
		
					}
					
					/* There could be data offset */
					offset += data_length+tvb_get_ntohs(tvb,offset+6);
					break;
					
					/* routing entry: A route entry follows as found in ADVERTISE, INQUIRE, LOOKUP & AUTHORITY */
				case ROUTING_ENTRY:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Routing Entry: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						dissect_route_entry(tvb,offset+4, tvb_get_ntohs(tvb,offset+2)-4, pnrp_message_tree);
					}
					
					/* There might be padding, so fill up to the next byte */
					padding_bytes = 0;
					while (data_length%4 != 0 &&tvb_reported_length_remaining(tvb, offset+data_length)>0) {
						data_length++;
						padding_bytes++;
					}
					/* Check if we actually had some padding bytes */
					if (0<padding_bytes) {
						proto_tree_add_text(pnrp_message_tree, tvb, offset + data_length-padding_bytes, padding_bytes, "Padding: %d bytes", padding_bytes);
					}
					offset += data_length;
					break;
					
					/* validate cpa: an encoded CPA structure follows as found in AUTHORITY */
				case VALIDATE_CPA:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Validate CPA: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* Do the actual parsing in own method */
						dissect_encodedCPA_structure(tvb, offset+4, data_length-4, pnrp_message_tree);
						
					}
					
					offset += data_length;
					break;
					
					
					/* IPV6 Endpoint: an ipv6 endpoint array structure follows as found in LOOKUP */
				case IPV6_ENDPOINT_ARRAY:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "IPv6 Endpoint Array: ");
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						/* Number of route entries */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_ipv6EndpointArray_NumberOfEntries, tvb, offset + 4, 2, FALSE);
						/* Array length */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_ipv6EndpointArray_ArrayLength, tvb, offset + 6, 2, FALSE);
						/* Element Field Type */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset+8 , 2, FALSE);
						/* Entry Length: must be 0x0012 (18 bytes) */
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_ipv6EndpointArray_EntryLength, tvb, offset + 10, 2, FALSE);
						/* Flagged Path */
						dissect_ipv6_endpoint_structure(tvb, offset+12, tvb_get_ntohs(tvb,offset+6)-8,pnrp_message_tree);
					}
					
					offset += data_length;
					break;
					
				default:
					if (tree) {
						pnrp_message_item = proto_tree_add_text(pnrp_tree, tvb, offset, 
																data_length, "Type: %s, length: %u",
																val_to_str(field_type, fieldID, "Unknown (0x%04x)"), data_length);
						pnrp_message_tree = proto_item_add_subtree(pnrp_message_item, ett_pnrp_message);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_type, tvb, offset , 2, FALSE);
						proto_tree_add_item(pnrp_message_tree, hf_pnrp_message_length, tvb, offset + 2, 2, FALSE);
						if(data_length > 4)
						{
							proto_tree_add_text(pnrp_message_tree, tvb, offset + 4, data_length -4, "Data");
						}
						else {
							return 0;
						}
					}
					offset += data_length;
					break;
			}
		}
	}
	return offset;
	
}

/*--------------------------------------------------------------*
 * Dissecting helper methods                                    *
 *--------------------------------------------------------------*/

static void dissect_pnrp_ids(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	while (32 <=length) {
		proto_tree_add_item(tree, hf_pnrp_message_pnrpID, tvb, offset, 32, FALSE);
		length -= 32;
		offset += 32;
	}
	
}

static void dissect_route_entry(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	gint tmp_offset;
	/* Check if we don't run out of data */ 
	if (0 <= tvb_reported_length_remaining(tvb, offset+length)) {
		tmp_offset = 0;
		/* First, we have a 32 Bit long PNRP ID */
		proto_tree_add_item(tree, hf_pnrp_message_pnrpID, tvb, offset+tmp_offset, 32, FALSE);
		tmp_offset +=32;
		/* Add PNRP Major Version */
		proto_tree_add_item(tree,hf_pnrp_header_versionMajor,tvb,offset+tmp_offset,1,FALSE);
		tmp_offset += 1;
		/* Add Minor Version */
		proto_tree_add_item(tree,hf_pnrp_header_versionMinor,tvb,offset+tmp_offset,1,FALSE);
		tmp_offset +=1;
		/* Port Number */
		proto_tree_add_item(tree,hf_pnrp_message_routeEntry_portNumber,tvb,offset+tmp_offset,2,FALSE);
		tmp_offset +=2;
		/* Flags */
		proto_tree_add_item(tree,hf_pnrp_message_routeEntry_flags,tvb,offset+tmp_offset,1,FALSE);
		tmp_offset +=1;
		/* Address count */
		proto_tree_add_item(tree,hf_pnrp_message_routeEntry_addressCount,tvb,offset+tmp_offset,1,FALSE);
		tmp_offset +=1;
		/* IPv6 Addresses */
		dissect_ipv6_address(tvb, offset+tmp_offset, length -tmp_offset, tree);
	}
}

static void dissect_ipv6_endpoint_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	/* Check if we don't run out of data */ 
	while (0 <= tvb_reported_length_remaining(tvb, offset+18) && 18 <=length) {
		/* Port Number */
		proto_tree_add_text(tree, tvb, offset, 2, "Port Number : %d",tvb_get_ntohs(tvb, offset));
		/* IPv6 Addresses */
		dissect_ipv6_address(tvb, offset+2,16,tree);
		offset += 18;
		length -= 18;
	}
}

static void dissect_ipv6_address(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	while (0 <= tvb_reported_length_remaining(tvb, offset+16) && 16 <=length) {
		proto_tree_add_item(tree, hf_pnrp_message_ipv6, tvb, offset, 16, FALSE);
		offset += 16;
		length -= 16;
	}
}

static void dissect_encodedCPA_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	/* Check if we don't run out of data */ 
	if (0 <= tvb_reported_length_remaining(tvb, offset+length)) {
		guint8 flagsField;
		/* Add a new subtree */
		proto_item *pnrp_encodedCPA_tree = NULL;
		proto_item *pnrp_encodedCPA_item = NULL;
		pnrp_encodedCPA_item = proto_tree_add_item(tree, hf_pnrp_encodedCPA, tvb, offset,length,FALSE);
		pnrp_encodedCPA_tree = proto_item_add_subtree(pnrp_encodedCPA_item, ett_pnrp_message_encodedCPA);
		
		/* Length information */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_length, tvb, offset, 2, FALSE);
		/* CPA Minor Version */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_minorVersion, tvb, offset+2, 1, FALSE);
		/* CPA Major Version */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_majorVersion, tvb, offset+3, 1, FALSE);
		/* PNRP Minor Version */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_header_versionMinor, tvb, offset+4, 1, FALSE);
		/* PNRP Major Version */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_header_versionMajor, tvb, offset+5, 1, FALSE);
		/* Flags Field */
		proto_tree_add_bitmask(pnrp_encodedCPA_tree, tvb, offset+6, hf_pnrp_encodedCPA_flags, ett_pnrp_message_encodedCPA_flags, encodedCPA_flags, FALSE);
		flagsField = tvb_get_guint8(tvb,offset+6);
		/* Reserved */
		proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset + 7, 1, "Reserved");
		/* Not After */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_notAfter, tvb, offset+8, 8, FALSE);
		/* Service Location */
		proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_serviceLocation, tvb, offset+16, 16, FALSE);
		
		/* now, the structure is variable, so add bytes to offset */
		offset +=32;
		
		/* Check if R Flag is set */
		if ((flagsField & FLAGS_ENCODED_CPA_R)==0x00) {
			/* Nonce follows */
			proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_message_nonce, tvb, offset, 16, FALSE);
			offset +=16;
		}
		/* Check if A Flag is set */
		if (flagsField & FLAGS_ENCODED_CPA_A) {
			/* Binary authority */
			proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_binaryAuthority, tvb, offset, 20, FALSE);
			offset +=20;
		}
		/* Check if C Flag is set */
		if (flagsField & FLAGS_ENCODED_CPA_C) {
			/* Classifiert Hash */
			proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_classifiertHash, tvb, offset, 20, FALSE);
			offset +=20;
		}
		/* Check if F Flag is set */
		if (flagsField & FLAGS_ENCODED_CPA_F) {
			/* Friendly Name Length */
			proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset,2, "Length of Friendly name : %d",tvb_get_letohs(tvb,offset));
			/* Friendly Name */
			proto_tree_add_item(pnrp_encodedCPA_tree, hf_pnrp_encodedCPA_friendlyName, tvb, offset+2, tvb_get_letohs(tvb,offset), FALSE);
			offset +=tvb_get_letohs(tvb,offset)+2;
		}
		/* Service Address List */
		proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset,2, "Number of Service Addresses : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset,2, "Service Address Length : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		/* A list of IPV6_Endpoint Structures follows */
		dissect_ipv6_endpoint_structure(tvb, offset,tvb_get_letohs(tvb,offset-4)*tvb_get_letohs(tvb,offset-2) , pnrp_encodedCPA_tree);
		offset += tvb_get_letohs(tvb,offset-4)*tvb_get_letohs(tvb,offset-2);
		/* A number of Payload Structures */
		proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset,2, "Number of Payload Structures : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		proto_tree_add_text(pnrp_encodedCPA_tree, tvb, offset,2, "Total Bytes of Payload : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		dissect_payload_structure(tvb,offset, tvb_get_letohs(tvb,offset-2)-4,pnrp_encodedCPA_tree);
		offset += tvb_get_letohs(tvb,offset-2)-4;
		/* Public Key */
		dissect_publicKey_structure(tvb, offset,tvb_get_letohs(tvb,offset),pnrp_encodedCPA_tree);
		offset += tvb_get_letohs(tvb,offset);
		/* Signature */
		dissect_signature_structure(tvb, offset,tvb_get_letohs(tvb,offset),pnrp_encodedCPA_tree);
		offset += tvb_get_letohs(tvb,offset);
	}
}
static void dissect_payload_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	guint16 lengthOfData;
	/* Add a new Subtree */
	proto_item *pnrp_payload_tree = NULL;
	proto_item *pnrp_payload_item = NULL;
	/* Check if we actually should display something */
	if (0<length ) {
	pnrp_payload_item = proto_tree_add_text(tree, tvb, offset, length, "Payload Structure");
	pnrp_payload_tree = proto_item_add_subtree(pnrp_payload_item, ett_pnrp_message_payloadStructure);
	
	/* Dissect the Payload Structure */
	/* Payload Type */
	proto_tree_add_text(pnrp_payload_tree, tvb, offset,4, "Payload Type : %d",tvb_get_letohl(tvb,offset));
	offset += 4;
	/* Data Length */
	lengthOfData = tvb_get_letohs(tvb,offset);
	proto_tree_add_text(pnrp_payload_tree, tvb, offset,2, "Length of Data : %d",lengthOfData);
	offset += 2;
	/* IPV6_APP_ENDPOINT Structure */
	while (0 <= tvb_reported_length_remaining(tvb, offset+20)&& 20 <= lengthOfData) {
		dissect_ipv6_address(tvb, offset, 16, pnrp_payload_tree);
		offset += 16;
		proto_tree_add_text(pnrp_payload_tree, tvb, offset,2, "Port Number : %d",tvb_get_letohs(tvb,offset));
		/* proto_tree_add_item(pnrp_payload_tree, hf_pnrp_payload_port, tvb, offset, 2, FALSE); */
		offset += 2;
		proto_tree_add_text(pnrp_payload_tree, tvb, offset,2, "IANA Protocol Number : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		lengthOfData -=20;
	}
	}
}
static void dissect_publicKey_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	guint16 objIDLength;
	guint16 cbDataLength;
	/* Add a new Subtree */
	proto_item *pnrp_publicKey_tree = NULL;
	proto_item *pnrp_publicKey_item = NULL;
	/* Check if we can safely parse Data */
	if (0 < length && 0 <= tvb_reported_length_remaining(tvb, offset+length)) {
		pnrp_publicKey_item = proto_tree_add_text(tree, tvb, offset, length, "CPA Public Key Structure");
		pnrp_publicKey_tree = proto_item_add_subtree(pnrp_publicKey_item, ett_pnrp_message_publicKeyStructure);
		/* Parsing of Data */
		/* Field Length of Structure */
		proto_tree_add_text(pnrp_publicKey_tree, tvb, offset,2, "Length of Structure : %d",tvb_get_letohs(tvb,offset));
		offset += 2;
		/* ObjID length */
		objIDLength = tvb_get_letohs(tvb,offset);
		proto_tree_add_text(pnrp_publicKey_tree, tvb, offset,2, "Size of Algorithm OID : %d",objIDLength);
		offset += 2;
		/* Reserved */
		proto_tree_add_text(pnrp_publicKey_tree, tvb, offset,2, "Reserved : %d",tvb_get_ntohs(tvb,offset));
		offset +=2;
		/* Public Key cbData Length */
		cbDataLength = tvb_get_letohs(tvb,offset);
		proto_tree_add_text(pnrp_publicKey_tree, tvb, offset,2, "Size of cbData : %d",cbDataLength);
		offset += 2;
		/* Unused Bits, actually only 7... */
		proto_tree_add_text(pnrp_publicKey_tree, tvb, offset,1, "Unused Bits : %d",7);
		offset +=1;
		/* Algorithm ObjID */
		proto_tree_add_item(pnrp_publicKey_tree, hf_pnrp_publicKey_objID, tvb, offset, objIDLength, FALSE);
		offset += objIDLength;
		/*  Public Key Data */
		proto_tree_add_item(pnrp_publicKey_tree, hf_pnrp_publicKey_publicKeyData, tvb, offset, cbDataLength, FALSE);
	}
}
static void dissect_signature_structure(tvbuff_t *tvb, gint offset, gint length, proto_tree *tree)
{
	guint16 signatureLength;
	/* Add a new Subtree */
	proto_item *pnrp_signature_tree = NULL;
	proto_item *pnrp_signature_item = NULL;
	/* Check if we can safely parse Data */
	if (0 < length && 0 <= tvb_reported_length_remaining(tvb, offset+length)) {
		pnrp_signature_item = proto_tree_add_text(tree, tvb, offset, length, "Signature Structure");
		pnrp_signature_tree = proto_item_add_subtree(pnrp_signature_item, ett_pnrp_message_signatureStructure);
		/* Parsing of Data */
		/* Field Length of Structure */
		proto_tree_add_text(pnrp_signature_tree, tvb, offset,2, "Length of Structure : %d",tvb_get_letohs(tvb,offset));
		offset +=2;
		/* Signature Length */
		signatureLength = tvb_get_letohs(tvb,offset);
		proto_tree_add_text(pnrp_signature_tree, tvb, offset,2, "Length of Signature : %d",signatureLength);
		offset += 2;
		/* Hash Algorithm Identifier */
		proto_tree_add_text(pnrp_signature_tree, tvb, offset,4, "Hash Algorithm Identifier : %x",tvb_get_letohl(tvb,offset));
		offset += 4;
		/* Signature Data */
		proto_tree_add_item(pnrp_signature_tree, hf_pnrp_signature_signatureData, tvb, offset, signatureLength, FALSE);
	}
}
/* Register the protocol */
void proto_register_pnrp(void)
{
	/* A header field is something you can search/filter on.
	 * 
	 * We create a structure to register our fields. It consists of an
	 * array of hf_register_info structures, each of which are of the format
	 * {&(field id), {name, abbrev, type, display, strings, bitmask, blurb, HFILL}}.
	 */
	static hf_register_info hf[] = {
		{ &hf_pnrp_header,
			{ "Header", "pnrp.header", FT_NONE, BASE_NONE, NULL, 0x0,
				"PNRP Header", HFILL }},
		{ &hf_pnrp_header_fieldID,
			{ "Header FieldID", "pnrp.header.fieldID", FT_UINT16, BASE_HEX, VALS(fieldID), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_length,
			{ "Header length", "pnrp.header.lenght", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_ident,
			{ "Ident", "pnrp.ident", FT_UINT8, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_versionMajor,
			{ "Version Major", "pnrp.vMajor", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_versionMinor,
			{ "Version Minor", "pnrp.vMinor", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_messageType,
			{ "Message Type", "pnrp.messageType", FT_UINT8, BASE_DEC, VALS(messageType), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_header_messageID,
			{ "Message ID", "pnrp.header.messageID", FT_UINT32, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_type,
			{ "Segment Type", "pnrp.segment.type", FT_UINT16, BASE_HEX, VALS(fieldID), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_length,
			{ "Segment length", "pnrp.segment.length", FT_UINT16, BASE_DEC, NULL, 0x0,
				"Message length", HFILL }},
		{ &hf_pnrp_message_headerack,
			{ "ACKed Header ID", "pnrp.segment.headerAck", FT_UINT32, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_pnrpID,
			{ "PNRP ID", "pnrp.segment.pnrpID", FT_BYTES, BASE_NONE, NULL, 0x0,
				NULL, HFILL }},
		/* Inquire Flags */
		{ &hf_pnrp_message_inquire_flags,
			{ "Flags", "pnrp.segment.inquire.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_inquire_flags_reserved1,
			{ "Reserved 1", "pnrp.segment.inquire.flags.reserved1", FT_UINT16, BASE_HEX, NULL, FLAGS_INQUIRE_RESERVED1,
				NULL, HFILL }},
		{ &hf_pnrp_message_inquire_flags_Abit,
			{ "CPA should (a)ppear in response", "pnrp.segment.inquire.flags.Abit", FT_UINT16, BASE_HEX, NULL, FLAGS_INQUIRE_A,
				NULL, HFILL }},
		{ &hf_pnrp_message_inquire_flags_Xbit,
			{ "E(X)tended Payload sent in Authority response", "pnrp.segment.inquire.flags.Xbit", FT_UINT16, BASE_HEX, NULL, FLAGS_INQUIRE_X,
				NULL, HFILL }},
		{ &hf_pnrp_message_inquire_flags_Cbit,
			{ "(C)ertificate Chain sent in Authority response", "pnrp.segment.inquire.flags.Cbit", FT_UINT16, BASE_HEX, NULL, FLAGS_INQUIRE_C,
				NULL, HFILL }},
		{ &hf_pnrp_message_inquire_flags_reserved2,
			{ "Reserved 2", "pnrp.segment.inquire.flags.reserved2", FT_UINT16, BASE_HEX, NULL, FLAGS_INQUIRE_RESERVED2,
				NULL, HFILL }},
		/* Classifier */
		{ &hf_pnrp_message_classifier_unicodeCount,
			{ "Number of Unicode Characters", "pnrp.segment.classifier.unicodeCount", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_classifier_arrayLength,
			{ "Array Length", "pnrp.segment.classifier.arrayLength", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_classifier_entryLength,
			{ "Entry Length", "pnrp.segment.classifier.entryLength", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		/* Ack Flags */
		{ &hf_pnrp_message_ack_flags_reserved,
			{ "Reserved", "pnrp.segment.ack.flags.reserved", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_ack_flags_Nbit,
			{ "(N)ot found Bit", "pnrp.segment.ack.flags.Nbit", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		/* Authority Flags */
		{ &hf_pnrp_message_authority_flags,
			{ "Flags", "pnrp.segment.authority.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_reserved1,
			{ "Reserved 1", "pnrp.segment.authority.flags.reserved1", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_RESERVED1,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_Lbit,
			{ "(L)eaf Set", "pnrp.segment.authority.flags.Lbit", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_L,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_reserved2,
			{ "Reserved 2", "pnrp.segment.authority.flags.reserved2", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_RESERVED2,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_Bbit,
			{ "(B)usy", "pnrp.segment.authority.flags.Bbit", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_B,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_reserved3,
			{ "Reserved 3", "pnrp.segment.authority.flags.reserved3", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_RESERVED3,
				NULL, HFILL }},
		{ &hf_pnrp_message_authority_flags_Nbit,
			{ "(N)ot found", "pnrp.segment.authority.flags.Nbit", FT_UINT16, BASE_HEX, NULL, FLAGS_AUTHORITY_N,
				NULL, HFILL }},
		/* Flood Control Flags */
		{ &hf_pnrp_message_flood_flags_reserved1,
			{ "Reserved", "pnrp.segment.flood.flags.reserved", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_flood_flags_Dbit,
			{ "(D)on't send ACK", "pnrp.segment.flood.flags.Dbit", FT_BOOLEAN, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		/* Split Controls */
		{ &hf_pnrp_message_splitControls_authorityBuffer,
			{ "Authority  Buffer Size:", "pnrp.segment.splitControls.authorityBuffer", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		/* IPv6 Endpoint Array */
		{ &hf_pnrp_message_ipv6EndpointArray_NumberOfEntries,
			{ "Number of Entries:", "pnrp.segment.ipv6EndpointArray.NumberOfEntries", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_ipv6EndpointArray_ArrayLength,
			{ "Array Length:", "pnrp.segment.ipv6EndpointArray.ArrayLength", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_ipv6EndpointArray_EntryLength,
			{ "Entry Length", "pnrp.segment.ipv6EndpointArray.EntryLength", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		/* Encoded CPA structrue */
		{ &hf_pnrp_encodedCPA,
			{ "Encoded CPA structure", "pnrp.encodedCPA", FT_NONE, BASE_NONE, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_length,
			{ "Length", "pnrp.encodedCPA.lenght", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_majorVersion,
			{ "CPA Major Version ", "pnrp.encodedCPA.vMajor", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_minorVersion,
			{ "CPA Minor Version", "pnrp.encodedCPA.vMinor", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
			/* Encoded CPA flags */
		{ &hf_pnrp_encodedCPA_flags,
			{ "Flags", "pnrp.encodedCPA.flags", FT_UINT8, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_reserved,
			{ "Reserved ", "pnrp.encodedCPA.flags.reserved", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_RESERVED,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Xbit,
			{ "CPA has E(X)tended Payload ", "pnrp.encodedCPA.flags.xbit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_X,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Fbit,
			{ "CPA contains (F)riendly Name ", "pnrp.encodedCPA.flags.fbit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_F,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Cbit,
			{ "CPA contains (C)lassifier Hash ", "pnrp.encodedCPA.flags.cbit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_C,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Abit,
			{ "CPA contains Binary (A)uthority field ", "pnrp.encodedCPA.flags.abit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_A,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Ubit,
			{ "Friendly Name in (U)TF-8 ", "pnrp.encodedCPA.flags.ubit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_U,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_flags_Rbit,
			{ "This is a (r)evoke CPA", "pnrp.encodedCPA.flags.rbit", FT_UINT8, BASE_HEX, NULL, FLAGS_ENCODED_CPA_R,
				NULL, HFILL }},
		/* TODO: Find correct way to Display Time */
		{ &hf_pnrp_encodedCPA_notAfter,
			{ "CPA expiration Date", "pnrp.encodedCPA.expirationDate", FT_UINT64,BASE_DEC, NULL, 0x0,
				"CPA expiration Date since January 1, 1601 UTC", HFILL }},
		{ &hf_pnrp_encodedCPA_serviceLocation,
			{ "Service Location", "pnrp.encodedCPA.serviceLocation", FT_BYTES,BASE_NONE, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_encodedCPA_binaryAuthority,
			{ "Binary Authoriy", "pnrp.encodedCPA.binaryAuthority", FT_BYTES,BASE_NONE, NULL, 0x0,
				"SHA-1 Hash of PublicKey Data field", HFILL }},
		{ &hf_pnrp_encodedCPA_classifiertHash,
			{ "Classifiert Hash", "pnrp.encodedCPA.classifierHash", FT_BYTES,BASE_NONE, NULL, 0x0,
				"SHA-1 Hash of the classifier text", HFILL }},
		{ &hf_pnrp_encodedCPA_friendlyName,
			{ "Friendly Name of PNRP ID", "pnrp.encodedCPA.friendlyName", FT_STRING,BASE_NONE, NULL, 0x0,
				"A human-readable label identifying the PNRP ID", HFILL }},
		/* Lookup Controls */
		{ &hf_pnrp_message_lookupControls_flags,
			{ "Flags", "pnrp.lookupControls.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_lookupControls_flags_reserved,
			{ "Reserved ", "pnrp.lookupControls.flags.reserved", FT_UINT16, BASE_HEX, NULL, FLAGS_LOOKUPCONTROLS_RESERVED,
				NULL, HFILL }},
		{ &hf_pnrp_message_lookupControls_flags_Abit,
			{ "A bit: ", "pnrp.lookupControls.flags.Abit", FT_UINT16, BASE_HEX, NULL, FLAGS_LOOKUPCONTROLS_A,
				"Sender is willing to accept returned nodes that are not closer to the target ID than the Validate PNRP ID", HFILL }},
		{ &hf_pnrp_message_lookupControls_flags_0bit,
			{ "0 bit - reserved: ", "pnrp.lookupControls.flags.0bit", FT_UINT16, BASE_HEX, NULL, FLAGS_LOOKUPCONTROLS_0,
				NULL, HFILL }},
		{ &hf_pnrp_message_lookupControls_precision,
			{ "Precision", "pnrp.lookupControls.precision", FT_UINT16, BASE_HEX, NULL, 0x0,
				"Precision - Number of significant bits to match", HFILL }},
		{ &hf_pnrp_message_lookupControls_resolveCriteria,
			{ "Resolve Criteria", "pnrp.lookupControls.resolveCriteria", FT_UINT8, BASE_HEX, VALS(resolveCriteria), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_lookupControls_reasonCode,
			{ "Reason Code", "pnrp.lookupControls.reasonCode", FT_UINT8, BASE_HEX, VALS(reasonCode), 0x0,
				NULL, HFILL }},
		/* Public Key Structure */
		{ &hf_pnrp_publicKey_objID,
			{ "Public Key Object Identifier", "pnrp.publicKey.objID", FT_STRING,BASE_NONE, NULL, 0x0,
				"An ASN.1-encoded object identifier (OID) indicating the public key format", HFILL }},
		{ &hf_pnrp_publicKey_publicKeyData,
			{ "Public Key Data", "pnrp.publicKey.publicKeyData", FT_STRING,BASE_NONE, NULL, 0x0,
				"An ASN.1-encoded 1024-bit RSA public key", HFILL }},
		/* Signature Structure */
		{ &hf_pnrp_signature_signatureData,
			{ "Signature ", "pnrp.signature.data", FT_BYTES,BASE_NONE, NULL, 0x0,
				"Signature created when signing the CPA", HFILL }},
		
		/* Route Entry */
		{ &hf_pnrp_message_routeEntry_portNumber,
			{ "Port Number", "pnrp.segment.routeEntry.portNumber", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_routeEntry_flags,
			{ "Flags", "pnrp.segment.routeEntry.flags", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_routeEntry_addressCount,
			{ "Address Count", "pnrp.segment.routeEntry.addressCount", FT_UINT8, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_nonce,
			{ "Nonce", "pnrp.segment.nonce", FT_BYTES, BASE_NONE, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_hashednonce,
			{ "Hashed Nonce", "pnrp.segment.hashednonce", FT_BYTES, BASE_NONE, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_idArray_NumEntries,
			{ "Number of Entries", "pnrp.segment.idArray.NumEnries", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_idArray_Length,
			{ "Length of Array ", "pnrp.segment.idArray.Length", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_ElementFieldType,
			{ "Type of Array Entry ", "pnrp.segment.ElementFieldType", FT_UINT16, BASE_HEX, VALS(fieldID), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_idarray_Entrylength,
			{ "Length of each Array Entry ", "pnrp.segment.idArray.Entrylength", FT_UINT16, BASE_DEC, NULL, 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_certChain,
			{ "Certificate Chain ", "pnrp.segment.certChain", FT_BYTES,BASE_NONE, NULL, 0x0,
				"A Certificate Chain, containing the public key used to sign the CPA and its Certificate Chain", HFILL }},
		{ &hf_pnrp_message_solicitType,
			{ "Solicit Type ", "pnrp.segment.solicitType", FT_UINT8, BASE_DEC, VALS(solicitType), 0x0,
				NULL, HFILL }},
		{ &hf_pnrp_message_ipv6,
			{ "IPv6 Address","pnrp.segment.ipv6Address",FT_IPv6, BASE_NONE, NULL, 0x0,"IPv6 Address",HFILL}}
	};
	
	/* Protocol subtree array */
	static gint *ett[] = {
		&ett_pnrp,
		&ett_pnrp_message,
		&ett_pnrp_message_inquire_flags,
		&ett_pnrp_message_authority_flags,
		&ett_pnrp_message_encodedCPA,
		&ett_pnrp_message_encodedCPA_flags,
		&ett_pnrp_message_payloadStructure,
		&ett_pnrp_message_publicKeyStructure,
		&ett_pnrp_message_signatureStructure,
		&ett_pnrp_message_lookupControls_flags
	};
	/* Register the Dissector with Wireshark */
	proto_pnrp = proto_register_protocol(PROTONAME,PROTOSHORTNAME,PROTOABBREV);
	
	proto_register_field_array(proto_pnrp,hf,array_length(hf));
	proto_register_subtree_array (ett, array_length(ett));
}

/* Initialise the dissector */
void proto_reg_handoff_pnrp(void)
{
	dissector_handle_t pnrp_handle;
	pnrp_handle = new_create_dissector_handle(dissect_pnrp, proto_pnrp);
	dissector_add("udp.port",PNRP_PORT,pnrp_handle);
}

