blob: df48fb0518c5c5ecb38d1795404030a591a51e58 [file] [log] [blame]
Alexander Afanasyevc74a6022011-08-15 20:01:35 -07001/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -07002/*
3 * Copyright (c) 2011 University of California, Los Angeles
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation;
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 *
18 * Author: Ilya Moiseenko <iliamo@cs.ucla.edu>
19 * Alexander Afanasyev <alexander.afanasyev@ucla.edu>
20 */
21
Alexander Afanasyev4aac5572012-08-09 10:49:55 -070022#ifndef _NDN_INTEREST_HEADER_H_
23#define _NDN_INTEREST_HEADER_H_
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -070024
Alexander Afanasyev2536e202011-08-12 14:13:10 -070025#include "ns3/integer.h"
26#include "ns3/header.h"
Alexander Afanasyeve275cf82012-04-18 14:25:02 -070027#include "ns3/simple-ref-count.h"
Alexander Afanasyevc74a6022011-08-15 20:01:35 -070028#include "ns3/nstime.h"
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -070029
30#include <string>
31#include <vector>
32#include <list>
33
Alexander Afanasyev4aac5572012-08-09 10:49:55 -070034#include "ndn-name-components.h"
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -070035
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -070036namespace ns3 {
37namespace ndn {
Alexander Afanasyev2536e202011-08-12 14:13:10 -070038
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -070039/**
Alexander Afanasyev4aac5572012-08-09 10:49:55 -070040 * Ndn XML definition of Interest
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -070041 *
42 * Only few important fields are actually implemented in the simulation
43 *
44 * <xs:element name="Interest" type="InterestType"/>
45 * <xs:complexType name="InterestType">
46 * <xs:sequence>
47 * <xs:element name="Name" type="NameType"/>
48 * <xs:element name="MinSuffixComponents" type="xs:nonNegativeInteger"
49 * minOccurs="0" maxOccurs="1"/>
50 * <xs:element name="MaxSuffixComponents" type="xs:nonNegativeInteger"
51 * minOccurs="0" maxOccurs="1"/>
52 * <xs:choice minOccurs="0" maxOccurs="1">
53 * <xs:element name="PublisherPublicKeyDigest" type="DigestType"/>
54 * <xs:element name="PublisherCertificateDigest" type="DigestType"/>
55 * <xs:element name="PublisherIssuerKeyDigest" type="DigestType"/>
56 * <xs:element name="PublisherIssuerCertificateDigest" type="DigestType"/>
57 * </xs:choice>
58 * <xs:element name="Exclude" type="ExcludeType"
59 * minOccurs="0" maxOccurs="1"/>
60 * <xs:element name="ChildSelector" type="xs:nonNegativeInteger"
61 * minOccurs="0" maxOccurs="1"/>
62 * <xs:element name="AnswerOriginKind" type="xs:nonNegativeInteger"
63 * minOccurs="0" maxOccurs="1"/>
64 * <xs:element name="Scope" type="xs:nonNegativeInteger"
65 * minOccurs="0" maxOccurs="1"/>
66 * <xs:element name="InterestLifetime" type="FinegrainLifetimeType"
67 * minOccurs="0" maxOccurs="1"/>
68 * <xs:element name="Nonce" type="Base64BinaryType"
69 * minOccurs="0" maxOccurs="1"/>
70 * </xs:sequence>
71 * </xs:complexType>
72 *
73 * <xs:complexType name="NameType">
74 * <xs:sequence>
75 * <xs:element name="Component" type="Base64BinaryType"
76 * minOccurs="0" maxOccurs="unbounded"/>
77 * </xs:sequence>
78 * </xs:complexType>
79 *
80 * <xs:complexType name="ExcludeType">
81 * <xs:sequence>
82 * <xs:choice minOccurs="0" maxOccurs="1">
83 * <xs:element name="Any" type="EmptyType"/>
84 * <xs:element name="Bloom" type="Base64BinaryType"/> <!-- Bloom is deprecated --!>
85 * </xs:choice>
86 * <xs:sequence minOccurs="0" maxOccurs="unbounded">
87 * <xs:element name="Component" type="Base64BinaryType"/>
88 * <xs:choice minOccurs="0" maxOccurs="1">
89 * <xs:element name="Any" type="EmptyType"/>
90 * <xs:element name="Bloom" type="Base64BinaryType"/> <!-- Bloom is deprecated --!>
91 * </xs:choice>
92 * </xs:sequence>
93 * </xs:sequence>
94 * </xs:complexType>
95 *
96 * <!-- Binary representation of time, Unix time epoch, units 2**-12 sec (0.000244140625 sec) -->
97 * <!-- The length limit limit of 6 bytes is not actually to be enforced, but
98 * it will be a loooooooong time before anyone cares. -->
99 *
100 * <!-- Binary representation of relative time, relative to "now" -->
101 * <xs:complexType name="FinegrainLifetimeType">
102 * <xs:simpleContent>
103 * <xs:extension base="BinaryTime12">
104 * <xs:attribute name="ccnbencoding" type="xs:string" fixed="base64Binary"/>
105 * </xs:extension>
106 * </xs:simpleContent>
107 * </xs:complexType>
108 *
109 * <xs:simpleType name="BinaryTime12">
110 * <xs:restriction base="xs:base64Binary">
111 * <xs:length value="6" fixed="true"/>
112 * </xs:restriction>
113 * </xs:simpleType>
114 *
115 **/
116
117/**
Alexander Afanasyevb4fee8b2012-06-06 12:54:26 -0700118 * @brief NDN InterestHeader and routines to serialize/deserialize
119 *
120 * Simplifications:
121 * - Name: binary name components are not supported
122 * - MinSuffixComponents and MasSuffixComponents: if value is negative (default), will not be serialized
123 * - ChildSelector, AnswerOriginKind: 0 - false, 1 - true, -1 not set
124 * - Publisher* elements are not supported
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700125 * - Exclude: only simple name matching is supported (Bloom support has been deprecated in Ndn)
Alexander Afanasyevb4fee8b2012-06-06 12:54:26 -0700126 * - InterestLifetime: ?
127 * - Nonce: 32 bit random integer. If value is 0, will not be serialized
128 **/
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700129class InterestHeader : public SimpleRefCount<InterestHeader, Header>
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700130{
131public:
132 /**
Ilya Moiseenko332add02011-12-24 17:21:25 -0800133 * \brief Constructor
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700134 *
135 * Creates a null header
136 **/
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700137 InterestHeader ();
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700138
139 /**
Alexander Afanasyev31cb4692012-08-17 13:08:20 -0700140 * @brief Copy constructor
141 */
142 InterestHeader (const InterestHeader &interest);
143
144 /**
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700145 * \brief Set interest name
146 *
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700147 * Sets name of the interest. For example, SetName( ndnNameComponents("prefix")("postfix") );
148 * @param[in] name const pointer to ndnNameComponents object that contains an interest name
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700149 **/
150 void
Alexander Afanasyevec1e3952012-08-20 13:48:15 -0700151 SetName (Ptr<NameComponents> name);
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700152
Ilya Moiseenko332add02011-12-24 17:21:25 -0800153
154 /**
155 * \brief Get interest name
156 *
157 * Gets name of the interest.
158 **/
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700159 const NameComponents&
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700160 GetName () const;
161
Ilya Moiseenko332add02011-12-24 17:21:25 -0800162 /**
Alexander Afanasyev30f60e32012-07-10 14:21:16 -0700163 * @brief Get smart pointer to the interest name (to avoid extra memory usage)
164 */
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700165 Ptr<const NameComponents>
Alexander Afanasyev30f60e32012-07-10 14:21:16 -0700166 GetNamePtr () const;
167
168 /**
Ilya Moiseenko332add02011-12-24 17:21:25 -0800169 * \brief Set interest MinSuffixComponents
170 *
171 * MinSuffixComponents refer to the number of name components beyond those in the prefix,
172 * and counting the implicit digest, that may occur in the matching ContentObject.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700173 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800174 * @param[in] value minimum length of suffix components
175 **/
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700176 void
177 SetMinSuffixComponents (int32_t value);
178
Ilya Moiseenko332add02011-12-24 17:21:25 -0800179 /**
180 * \brief Get interest MinSuffixComponents
181 *
182 * MinSuffixComponents refer to the number of name components beyond those in the prefix,
183 * and counting the implicit digest, that may occur in the matching ContentObject.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700184 * For more information, see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html
Ilya Moiseenko332add02011-12-24 17:21:25 -0800185 **/
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700186 int32_t
187 GetMinSuffixComponents () const;
188
Ilya Moiseenko332add02011-12-24 17:21:25 -0800189
190 /**
191 * \brief Set interest MaxSuffixComponents
192 *
193 * MaxSuffixComponents refer to the number of name components beyond those in the prefix,
194 * and counting the implicit digest, that may occur in the matching ContentObject.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700195 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800196 * @param[in] value maximum length of suffix components
197 **/
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700198 void
199 SetMaxSuffixComponents (int32_t value);
200
Ilya Moiseenko332add02011-12-24 17:21:25 -0800201 /**
202 * \brief Get interest MaxSuffixComponents
203 *
204 * MaxSuffixComponents refer to the number of name components beyond those in the prefix,
205 * and counting the implicit digest, that may occur in the matching ContentObject.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700206 * For more information, see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html
Ilya Moiseenko332add02011-12-24 17:21:25 -0800207 **/
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700208 int32_t
209 GetMaxSuffixComponents () const;
210
211 /**
212 * \brief Set exclude filer
213 *
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700214 * For example, SetExclude (ndnNameComponents("exclude1")("exclude2")("exclude3"))
215 * @param[in] exclude const pointer to ndnNameComponents to be excluded
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700216 **/
217 void
Alexander Afanasyevec1e3952012-08-20 13:48:15 -0700218 SetExclude (Ptr<NameComponents> exclude);
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700219
Ilya Moiseenko332add02011-12-24 17:21:25 -0800220 /**
221 * \brief Check if interest conatins exclude filter
222 *
223 */
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -0700224 bool
225 IsEnabledExclude () const;
226
Ilya Moiseenko332add02011-12-24 17:21:25 -0800227 /**
228 * \brief Get exclude filter
229 */
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700230 const NameComponents&
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700231 GetExclude () const;
232
Ilya Moiseenko332add02011-12-24 17:21:25 -0800233 /**
234 * \brief Set ChildSelector
235 * Often a given interest will match more than one ContentObject within a given content store.
236 * The ChildSelector provides a way of expressing a preference for which of these should be returned.
237 * If the value is false, the leftmost child is preferred. If true, the rightmost child is preferred.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700238 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800239 * @param[in] value boolean ChildSelector value
240 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700241 void
Alexander Afanasyevc74a6022011-08-15 20:01:35 -0700242 SetChildSelector (bool value);
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700243
Ilya Moiseenko332add02011-12-24 17:21:25 -0800244 /**
245 * \brief Return ChildSelector value
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700246 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800247 *
248 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700249 bool
250 IsEnabledChildSelector () const;
251
Ilya Moiseenko332add02011-12-24 17:21:25 -0800252 /**
253 * \brief Set AnswerOriginKind
254 * Default value for AnswerOriginKind is false.
255 * @param[in] value boolean AnswerOriginKind value
256 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700257 void
Alexander Afanasyevc74a6022011-08-15 20:01:35 -0700258 SetAnswerOriginKind (bool value);
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700259
Ilya Moiseenko332add02011-12-24 17:21:25 -0800260 /**
261 * \brief Check the value of AnswerOriginKind
262 *
263 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700264 bool
265 IsEnabledAnswerOriginKind () const;
266
Ilya Moiseenko332add02011-12-24 17:21:25 -0800267 /**
268 * \brief Set Scope
269 * Scope limits where the Interest may propagate.
270 * Scope 0 prevents propagation beyond the local ccnd (even to other applications on the same host).
271 * Scope 1 limits propagation to the applications on the originating host.
272 * Scope 2 limits propagation to no further than the next host.
273 * Other values are not defined, and will cause the Interest message to be dropped.
274 * Note that this is not a hop count - the value is not decremented as the interest is forwarded.
275 * @param[in] scope interest scope
276 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700277 void
278 SetScope (int8_t scope);
279
Ilya Moiseenko332add02011-12-24 17:21:25 -0800280 /**
281 * \brief Get Scope value
282 * Scope limits where the Interest may propagate.
283 * Scope 0 prevents propagation beyond the local ccnd (even to other applications on the same host).
284 * Scope 1 limits propagation to the applications on the originating host.
285 * Scope 2 limits propagation to no further than the next host.
286 * Other values are not defined, and will cause the Interest message to be dropped.
287 * Note that this is not a hop count - the value is not decremented as the interest is forwarded.
288 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700289 int8_t
290 GetScope () const;
291
Ilya Moiseenko332add02011-12-24 17:21:25 -0800292 /**
293 * \brief Set InterestLifetime
294 * InterestLifetime indicates the (approximate) time remaining before the interest times out.
295 * The timeout is relative to the arrival time of the interest at the current node.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700296 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800297 * @param[in] time interest lifetime
298 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700299 void
Alexander Afanasyevc74a6022011-08-15 20:01:35 -0700300 SetInterestLifetime (Time time);
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700301
Ilya Moiseenko332add02011-12-24 17:21:25 -0800302 /**
303 * \brief Get InterestLifetime value
304 * InterestLifetime indicates the (approximate) time remaining before the interest times out.
305 * The timeout is relative to the arrival time of the interest at the current node.
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700306 * \see http://www.ndn.org/releases/latest/doc/technical/InterestMessage.html for more information.
Ilya Moiseenko332add02011-12-24 17:21:25 -0800307 */
Alexander Afanasyevc74a6022011-08-15 20:01:35 -0700308 Time
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700309 GetInterestLifetime () const;
310
Ilya Moiseenko332add02011-12-24 17:21:25 -0800311 /**
312 * \brief Set Nonce
313 * Nonce carries a randomly-genenerated bytestring that is used to detect and discard duplicate Interest messages.
314 * @param[in] nonce Unique packet identification number
315 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700316 void
317 SetNonce (uint32_t nonce);
318
Ilya Moiseenko332add02011-12-24 17:21:25 -0800319 /**
320 * \brief Get Nonce value
321 * Nonce carries a randomly-genenerated bytestring that is used to detect and discard duplicate Interest messages.
322 *
323 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700324 uint32_t
325 GetNonce () const;
Ilya Moiseenko332add02011-12-24 17:21:25 -0800326
327 /**
Alexander Afanasyevb4fee8b2012-06-06 12:54:26 -0700328 * @brief NACK Type
329 * Specifies the type of Interest packet
Ilya Moiseenko332add02011-12-24 17:21:25 -0800330 */
Alexander Afanasyeva46844b2011-11-21 19:13:26 -0800331 enum
332 {
333 NORMAL_INTEREST = 0,
Alexander Afanasyev23d2b542011-12-07 18:54:46 -0800334 NACK_LOOP = 10,
335 NACK_CONGESTION = 11,
336 NACK_GIVEUP_PIT = 12,
Alexander Afanasyeva46844b2011-11-21 19:13:26 -0800337 };
338
Ilya Moiseenko332add02011-12-24 17:21:25 -0800339 /**
340 * \brief Mark the Interest as a Negative Acknowledgement
341 * Three types of NACKs are supported
342 * 1. NACK_LOOP
343 * 2. NACK_CONGESTION
344 * 3. NACK_GIVEUP_PIT
345 * @param[in] nackType NACK_LOOP or NACK_CONGESTION or NACK_GIVEUP_PIT or NORMAL_INTEREST
346 */
Ilya Moiseenko75d9bf52011-10-28 13:18:32 -0700347 void
Alexander Afanasyeva46844b2011-11-21 19:13:26 -0800348 SetNack (uint32_t nackType);
Ilya Moiseenko75d9bf52011-10-28 13:18:32 -0700349
Ilya Moiseenko332add02011-12-24 17:21:25 -0800350 /**
351 * \brief Get NACK type
352 * Returns NACK_LOOP, NACK_CONGESTION or NACK_GIVEUP_PIT.
353 * Otherwise, in case of normal interest packet, returns NORMAL_INTEREST (equals 0).
354 */
Alexander Afanasyeva46844b2011-11-21 19:13:26 -0800355 uint32_t
356 GetNack () const;
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700357
358 //////////////////////////////////////////////////////////////////
Alexander Afanasyevb4fee8b2012-06-06 12:54:26 -0700359
360 static TypeId GetTypeId (void); ///< @brief Get TypeId of the class
361 virtual TypeId GetInstanceTypeId (void) const; ///< @brief Get TypeId of the instance
Ilya Moiseenko332add02011-12-24 17:21:25 -0800362
363 /**
364 * \brief Print Interest packet
365 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700366 virtual void Print (std::ostream &os) const;
Ilya Moiseenko332add02011-12-24 17:21:25 -0800367
368 /**
369 * \brief Get the size of Interest packet
370 * Returns the Interest packet size after serialization
371 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700372 virtual uint32_t GetSerializedSize (void) const;
Ilya Moiseenko332add02011-12-24 17:21:25 -0800373
374 /**
375 * \brief Serialize Interest packet
376 * Serializes Interest packet into Buffer::Iterator
377 * @param[in] start buffer to contain serialized Interest packet
378 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700379 virtual void Serialize (Buffer::Iterator start) const;
Ilya Moiseenko332add02011-12-24 17:21:25 -0800380
381 /**
382 * \brief Deserialize Interest packet
383 * Deserializes Buffer::Iterator into Interest packet
384 * @param[in] start buffer that contains serialized Interest packet
385 */
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700386 virtual uint32_t Deserialize (Buffer::Iterator start);
387
388private:
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700389 Ptr<NameComponents> m_name; ///< Interest name
390 int32_t m_minSuffixComponents; ///< Minimum suffix components. not used if negative
391 int32_t m_maxSuffixComponents; ///< Maximum suffix components. not used if negative
392 Ptr<NameComponents> m_exclude; ///< Exclude filter
393 bool m_childSelector; ///< Default value for ChildSelector is false
394 bool m_answerOriginKind; ///< Default value for AnswerOriginKind is false
395 int8_t m_scope; ///< -1 not set, 0 local scope, 1 this host, 2 immediate neighborhood
396 Time m_interestLifetime; ///< InterestLifetime
397 uint32_t m_nonce; ///< Nonce. not used if zero
398 uint32_t m_nackType; ///< Negative Acknowledgement type
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700399};
400
Ilya Moiseenko332add02011-12-24 17:21:25 -0800401/**
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700402 * @ingroup ndn-exceptions
Alexander Afanasyevb4fee8b2012-06-06 12:54:26 -0700403 * @brief Class for Interest parsing exception
Ilya Moiseenko332add02011-12-24 17:21:25 -0800404 */
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700405class InterestHeaderException {};
Alexander Afanasyev85a3bca2011-08-31 16:51:03 -0700406
Alexander Afanasyev2b4c9472012-08-09 15:00:38 -0700407} // namespace ndn
Alexander Afanasyev8a677dd2011-08-12 13:08:15 -0700408} // namespace ns3
409
Alexander Afanasyev4aac5572012-08-09 10:49:55 -0700410#endif // _NDN_INTEREST_HEADER_H_