A Discrete-Event Network Simulator
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2005,2006 INRIA
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
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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
19  */
20 #ifndef PACKET_H
21 #define PACKET_H
23 #include <stdint.h>
24 #include "buffer.h"
25 #include "header.h"
26 #include "trailer.h"
27 #include "packet-metadata.h"
28 #include "tag.h"
29 #include "byte-tag-list.h"
30 #include "packet-tag-list.h"
31 #include "nix-vector.h"
32 #include "ns3/mac48-address.h"
33 #include "ns3/callback.h"
34 #include "ns3/assert.h"
35 #include "ns3/ptr.h"
36 #include "ns3/deprecated.h"
38 namespace ns3 {
40 // Forward declaration
41 class Address;
55 {
56 public:
61  class Item
62  {
63 public:
67  TypeId GetTypeId (void) const;
73  uint32_t GetStart (void) const;
79  uint32_t GetEnd (void) const;
88  void GetTag (Tag &tag) const;
89 private:
90  friend class ByteTagIterator;
98  Item (TypeId tid, uint32_t start, uint32_t end, TagBuffer buffer);
101  uint32_t m_start;
102  uint32_t m_end;
104  };
108  bool HasNext (void) const;
112  Item Next (void);
113 private:
114  friend class Packet;
121 };
130 {
131 public:
135  class Item
136  {
137 public:
141  TypeId GetTypeId (void) const;
150  void GetTag (Tag &tag) const;
151 private:
152  friend class PacketTagIterator;
157  Item (const struct PacketTagList::TagData *data);
159  };
163  bool HasNext (void) const;
167  Item Next (void);
168 private:
169  friend class Packet;
174  PacketTagIterator (const struct PacketTagList::TagData *head);
176 };
227 class Packet : public SimpleRefCount<Packet>
228 {
229 public:
235  Packet ();
240  Packet (const Packet &o);
246  Packet &operator = (const Packet &o);
258  Packet (uint32_t size);
271  Packet (uint8_t const*buffer, uint32_t size, bool magic);
282  Packet (uint8_t const*buffer, uint32_t size);
293  Ptr<Packet> CreateFragment (uint32_t start, uint32_t length) const;
300  inline uint32_t GetSize (void) const;
311  void AddHeader (const Header & header);
320  uint32_t RemoveHeader (Header &header);
329  uint32_t PeekHeader (Header &header) const;
340  void AddTrailer (const Trailer &trailer);
349  uint32_t RemoveTrailer (Trailer &trailer);
358  uint32_t PeekTrailer (Trailer &trailer);
368  void AddAtEnd (Ptr<const Packet> packet);
374  void AddPaddingAtEnd (uint32_t size);
383  void RemoveAtEnd (uint32_t size);
392  void RemoveAtStart (uint32_t size);
404  uint32_t CopyData (uint8_t *buffer, uint32_t size) const;
414  void CopyData (std::ostream *os, uint32_t size) const;
425  Ptr<Packet> Copy (void) const;
446  uint64_t GetUid (void) const;
458  void Print (std::ostream &os) const;
467  std::string ToString (void) const;
492  static void EnablePrinting (void);
503  static void EnableChecking (void);
516  uint32_t GetSerializedSize (void) const;
526  uint32_t Serialize (uint8_t* buffer, uint32_t maxSize) const;
544  void AddByteTag (const Tag &tag) const;
550  ByteTagIterator GetByteTagIterator (void) const;
560  bool FindFirstMatchingByteTag (Tag &tag) const;
565  void RemoveAllByteTags (void);
573  void PrintByteTags (std::ostream &os) const;
584  void AddPacketTag (const Tag &tag) const;
593  bool RemovePacketTag (Tag &tag);
604  bool ReplacePacketTag (Tag & tag);
612  bool PeekPacketTag (Tag &tag) const;
616  void RemoveAllPacketTags (void);
626  void PrintPacketTags (std::ostream &os) const;
649  void SetNixVector (Ptr<NixVector> nixVector);
657  Ptr<NixVector> GetNixVector (void) const;
664  typedef void (* TracedCallback) (Ptr<const Packet> packet);
672  typedef void (* AddressTracedCallback)
681  typedef void (* Mac48AddressTracedCallback)
690  typedef void (* SizeTracedCallback)
691  (uint32_t oldSize, uint32_t newSize);
699  typedef void (* SinrTracedCallback)
700  (Ptr<const Packet> packet, double sinr);
703 private:
711  Packet (const Buffer &buffer, const ByteTagList &byteTagList,
712  const PacketTagList &packetTagList, const PacketMetadata &metadata);
720  uint32_t Deserialize (uint8_t const*buffer, uint32_t size);
727  /* Please see comments above about nix-vector */
730  static uint32_t m_globalUid;
731 };
740 std::ostream& operator<< (std::ostream& os, const Packet &packet);
783 } // namespace ns3
785 /****************************************************
786  * Implementation of inline methods for performance
787  ****************************************************/
789 namespace ns3 {
791 uint32_t
792 Packet::GetSize (void) const
793 {
794  return m_buffer.GetSize ();
795 }
797 } // namespace ns3
799 #endif /* PACKET_H */
bool HasNext(void) const
Definition: packet.cc:65
Protocol header serialization and deserialization.
Definition: header.h:42
PacketMetadata m_metadata
the packet's metadata
Definition: packet.h:725
uint32_t RemoveHeader(Header &header)
Deserialize and remove the header from the internal buffer.
Definition: packet.cc:268
bool FindFirstMatchingByteTag(Tag &tag) const
Finds the first tag matching the parameter Tag type.
Definition: packet.cc:807
void(* Mac48AddressTracedCallback)(Ptr< const Packet > packet, Mac48Address mac)
TracedCallback signature for packet and Mac48Address.
Definition: packet.h:682
void PrintPacketTags(std::ostream &os) const
Print the list of packet tags.
Definition: packet.cc:859
uint32_t Deserialize(uint8_t const *buffer, uint32_t size)
Deserializes a packet.
Definition: packet.cc:709
const struct PacketTagList::TagData * m_data
the tag data
Definition: packet.h:158
automatically resized byte buffer
Definition: buffer.h:92
def start()
Definition: core.py:1482
Forward calls to a chain of Callback.
void AddPacketTag(const Tag &tag) const
Add a packet tag.
Definition: packet.cc:824
List of the packet tags stored in a packet.
uint64_t GetUid(void) const
Returns the packet's Uid.
Definition: packet.cc:368
uint32_t Serialize(uint8_t *buffer, uint32_t maxSize) const
Serialize a packet, tags, and metadata into a byte buffer.
Definition: packet.cc:591
keep track of the byte tags stored in a packet.
Definition: byte-tag-list.h:63
static uint32_t m_globalUid
Global counter of packets Uid.
Definition: packet.h:730
void(* SizeTracedCallback)(uint32_t oldSize, uint32_t newSize)
TracedCallback signature for changes in packet size.
Definition: packet.h:691
uint32_t GetSize(void) const
Returns the the size in bytes of the packet (including the zero-filled initial payload).
Definition: packet.h:792
Buffer m_buffer
the packet buffer (it's actual contents)
Definition: packet.h:722
Ptr< NixVector > GetNixVector(void) const
Get the packet nix-vector.
Definition: packet.cc:251
Item(TypeId tid, uint32_t start, uint32_t end, TagBuffer buffer)
Definition: packet.cc:57
void Print(std::ostream &os) const
Print the packet contents.
Definition: packet.cc:412
Packet & operator=(const Packet &o)
Basic assignment.
Definition: packet.cc:157
network packets
Definition: packet.h:227
Item Next(void)
Definition: packet.cc:94
PacketTagIterator GetPacketTagIterator(void) const
Returns an object which can be used to iterate over the list of packet tags.
Definition: packet.cc:882
a polymophic address class
Definition: address.h:90
ByteTagList::Iterator m_current
actual position over the set of byte tags in a packet
Definition: packet.h:120
Create an empty packet with a new uid (as returned by getUid).
Definition: packet.cc:130
void GetTag(Tag &tag) const
Read the requested tag and store it in the user-provided tag instance.
Definition: packet.cc:112
Ptr< Packet > CreateFragment(uint32_t start, uint32_t length) const
Create a new packet which contains a fragment of the original packet.
Definition: packet.cc:228
uint32_t PeekTrailer(Trailer &trailer)
Deserialize but does not remove a trailer from the internal buffer.
Definition: packet.cc:305
void AddAtEnd(Ptr< const Packet > packet)
Concatenate the input packet at the end of the current packet.
Definition: packet.cc:313
Tree node for sharing serialized tags.
bool PeekPacketTag(Tag &tag) const
Search a matching tag and call Tag::Deserialize if it is found.
Definition: packet.cc:846
void RemoveAllPacketTags(void)
Remove all packet tags.
Definition: packet.cc:852
Identifies a byte tag and a set of bytes within a packet to which the tag applies.
Definition: packet.h:61
bool HasNext(void) const
Definition: packet.cc:89
void RemoveAtStart(uint32_t size)
Remove size bytes from the start of the current packet.
Definition: packet.cc:340
TagBuffer m_buffer
the buffer associated with this tag.
Definition: packet.h:103
std::string ToString(void) const
Return a string representation of the packet.
Definition: packet.cc:404
static void EnablePrinting(void)
Enable printing packets metadata.
Definition: packet.cc:535
void(* AddressTracedCallback)(Ptr< const Packet > packet, const Address &address)
TracedCallback signature for packet and Address.
Definition: packet.h:673
TypeId m_tid
the ns3::TypeId associated to this tag.
Definition: packet.h:100
void SetNixVector(Ptr< NixVector > nixVector)
Set the packet nix-vector.
Definition: packet.cc:245
ByteTagList m_byteTagList
the ByteTag list
Definition: packet.h:723
Defines a linked list of Packet tags, including copy-on-write semantics.
uint8_t data[writeSize]
Iterator class for metadata items.
bool ReplacePacketTag(Tag &tag)
Replace the value of a packet tag.
Definition: packet.cc:838
static void EnableChecking(void)
Enable packets metadata checking.
Definition: packet.cc:542
void AddPaddingAtEnd(uint32_t size)
Add a zero-filled padding to the packet.
Definition: packet.cc:325
ByteTagIterator GetByteTagIterator(void) const
Returns an iterator over the set of byte tags included in this packet.
Definition: packet.cc:801
Item Next(void)
Definition: packet.cc:70
uint32_t GetEnd(void) const
The index is an offset from the start of the packet.
Definition: packet.cc:44
void(* SinrTracedCallback)(Ptr< const Packet > packet, double sinr)
TracedCallback signature for packet and SINR.
Definition: packet.h:700
Iterator over the set of packet tags in a packet.
Definition: packet.h:129
void PrintByteTags(std::ostream &os) const
Iterate over the byte tags present in this packet, and invoke the Print method of each tag stored in ...
Definition: packet.cc:374
const struct PacketTagList::TagData * m_current
actual position over the set of tags in a packet
Definition: packet.h:175
tuple mac
Definition: third.py:92
std::ostream & operator<<(std::ostream &os, const Angles &a)
print a struct Angles to output
Definition: angles.cc:42
Ptr< Packet > Copy(void) const
performs a COW copy of the packet.
Definition: packet.cc:122
uint32_t PeekHeader(Header &header) const
Deserialize but does not remove the header from the internal buffer.
Definition: packet.cc:278
uint32_t m_end
the index of the last byte tagged by this tag.
Definition: packet.h:102
Protocol trailer serialization and deserialization.
Definition: trailer.h:40
tag a set of bytes in a packet
Definition: tag.h:36
Every class exported by the ns3 library is enclosed in the ns3 namespace.
PacketMetadata::ItemIterator BeginItem(void) const
Returns an iterator which points to the first 'item' stored in this buffer.
Definition: packet.cc:529
PacketTagIterator(const struct PacketTagList::TagData *head)
Definition: packet.cc:84
void AddTrailer(const Trailer &trailer)
Add trailer to this packet.
Definition: packet.cc:285
void RemoveAtEnd(uint32_t size)
Remove size bytes from the end of the current packet.
Definition: packet.cc:333
Iterator over the set of byte tags in a packet.
Definition: packet.h:54
uint32_t RemoveTrailer(Trailer &trailer)
Remove a deserialized trailer from the internal buffer.
Definition: packet.cc:296
an EUI-48 address
Definition: mac48-address.h:43
PacketTagList m_packetTagList
the packet's Tag list
Definition: packet.h:724
TypeId GetTypeId(void) const
Definition: packet.cc:34
Identifies a packet tag within a packet.
Definition: packet.h:135
uint32_t GetSize(void) const
Definition: buffer.h:1062
TypeId GetTypeId(void) const
Definition: packet.cc:107
Item(const struct PacketTagList::TagData *data)
Definition: packet.cc:102
void GetTag(Tag &tag) const
Read the requested tag and store it in the user-provided tag instance.
Definition: packet.cc:49
An iterator for iterating through a byte tag list.
Definition: byte-tag-list.h:72
read and write tag data
Definition: tag-buffer.h:51
uint32_t GetStart(void) const
The index is an offset from the start of the packet.
Definition: packet.cc:39
uint32_t GetSerializedSize(void) const
Returns number of bytes required for packet serialization.
Definition: packet.cc:548
bool RemovePacketTag(Tag &tag)
Remove a packet tag.
Definition: packet.cc:831
void RemoveAllByteTags(void)
Remove all byte tags stored in this packet.
Definition: packet.cc:349
Ptr< NixVector > m_nixVector
the packet's Nix vector
Definition: packet.h:728
uint32_t CopyData(uint8_t *buffer, uint32_t size) const
Copy the packet contents to a byte buffer.
Definition: packet.cc:356
uint32_t m_start
the index of the first byte tagged by this tag.
Definition: packet.h:101
ByteTagIterator(ByteTagList::Iterator i)
Copy Constructor.
Definition: packet.cc:78
tuple address
Definition: first.py:37
A template-based reference counting class.
a unique identifier for an interface.
Definition: type-id.h:58
void AddHeader(const Header &header)
Add header to this packet.
Definition: packet.cc:257
Handle packet metadata about packet headers and trailers.
void AddByteTag(const Tag &tag) const
Tag each byte included in this packet with a new byte tag.
Definition: packet.cc:791