ns3::PacketTagList::TagData Struct Reference

#include <packet-tag-list.h>

Collaboration diagram for ns3::PacketTagList::TagData:

Public Types
enum	TagData_e { MAX_SIZE = 20 }
	Packet Tag maximum size. More...

Public Attributes
uint32_t	count
uint8_t	data [MAX_SIZE]
struct TagData *	next
TypeId	tid

Detailed Description

Tree node for sharing serialized tags.

See PacketTagList for a discussion of the data structure.

See TagData::TagData_e for a discussion of the size limit on tag serialization.

Definition at line 140 of file packet-tag-list.h.

Member Enumeration Documentation

enum ns3::PacketTagList::TagData::TagData_e

Packet Tag maximum size.

The maximum size (in bytes) of a Tag is stored in this constant.

Internal:

Ideally, TagData would be 32 bytes in size, so they require no padding on 64-bit architectures. (The architecture affects the size because of the next pointer.) This would leave 18 bytes for data. However, ns3:Ipv6PacketInfoTag needs 19 bytes! The current implementation allows 20 bytes, which gives TagData a size of 30 bytes on 32-byte machines (which gets padded with 2 bytes), and 34 bytes on 64-bit machines, which gets padded to 40 bytes.

Enumerator
MAX_SIZE	Size of serialization buffer data

Definition at line 159 of file packet-tag-list.h.

Member Data Documentation

uint32_t ns3::PacketTagList::TagData::count

Number of incoming links

Definition at line 167 of file packet-tag-list.h.

Referenced by ns3::PacketTagList::Add(), ns3::PacketTagList::COWTraverse(), ns3::PacketTagList::operator=(), ns3::PacketTagList::PacketTagList(), ns3::PacketTagList::RemoveAll(), ns3::PacketTagList::RemoveWriter(), and ns3::PacketTagList::ReplaceWriter().

uint8_t ns3::PacketTagList::TagData::data[MAX_SIZE]

Serialization buffer

Definition at line 164 of file packet-tag-list.h.

Referenced by ns3::PacketTagList::Add(), ns3::PacketTagList::COWTraverse(), ns3::PacketTagList::RemoveWriter(), and ns3::PacketTagList::ReplaceWriter().

struct TagData* ns3::PacketTagList::TagData::next

Pointer to next in list

Definition at line 165 of file packet-tag-list.h.

Referenced by ns3::PacketTagList::Add(), ns3::PacketTagList::COWTraverse(), ns3::PacketTagIterator::Next(), ns3::PacketTagList::Peek(), ns3::PacketTagList::RemoveAll(), ns3::PacketTagList::RemoveWriter(), and ns3::PacketTagList::ReplaceWriter().

TypeId ns3::PacketTagList::TagData::tid

Type of the tag serialized into data

Definition at line 166 of file packet-tag-list.h.

Referenced by ns3::PacketTagList::Add(), ns3::PacketTagList::COWTraverse(), and ns3::PacketTagList::ReplaceWriter().

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The documentation for this struct was generated from the following file:

• src/network/model/packet-tag-list.h