IPHelper Class Reference

This class provides several methods that can be used by elements that inherits from it in order to manage IP packets. More...

#include <iphelper.hh>

Inheritance diagram for IPHelper:

Public Member Functions
uint16_t	packetTotalLength (Packet *packet) const
	Return the length of the IP packet, obtained from the header.
uint16_t	getIPHeaderOffset (Packet *packet) const
	Return the offset in the packet at which the IP header starts.
void	setPacketTotalLength (WritablePacket *packet, unsigned length) const
	Set the length of the IP packet in the header.
uint32_t	getDestinationAddress (Packet *packet) const
	Return the IP destination address of the packet.
uint32_t	getSourceAddress (Packet *packet) const
	Return the IP source address of the packet.
void	computeIPChecksum (WritablePacket *packet) const
	Recompute the IP checksum of the packet and set it in the IP header.
void	rewrite_ipport (WritablePacket *p, IPAddress ip, uint16_t port, const int shift, bool is_tcp)

Detailed Description

This class provides several methods that can be used by elements that inherits from it in order to manage IP packets.

Member Function Documentation

packetTotalLength()

uint16_t IPHelper::packetTotalLength ( Packet *  packet ) const

inline

Return the length of the IP packet, obtained from the header.

Parameters

packet

The IP packet

Returns

The length of the given IP packet, obtained from the IP header

getIPHeaderOffset()

uint16_t IPHelper::getIPHeaderOffset ( Packet *  packet ) const

inline

Return the offset in the packet at which the IP header starts.

Parameters

packet

The IP packet

Returns

The offset in the packet at which the IP header starts

setPacketTotalLength()

void IPHelper::setPacketTotalLength ( WritablePacket *  packet, unsigned  length  ) const

inline

Set the length of the IP packet in the header.

Parameters

packet	The IP packet
length	The new length of the given IP packet

getDestinationAddress()

uint32_t IPHelper::getDestinationAddress ( Packet *  packet ) const

inline

Return the IP destination address of the packet.

Parameters

packet

The IP packet

Returns

The IP destination address of the packet

getSourceAddress()

uint32_t IPHelper::getSourceAddress ( Packet *  packet ) const

inline

Return the IP source address of the packet.

Parameters

packet

The IP packet

Returns

The IP source address of the packet

computeIPChecksum()

void IPHelper::computeIPChecksum ( WritablePacket *  packet ) const

inline

Recompute the IP checksum of the packet and set it in the IP header.

Parameters

packet

The IP packet

rewrite_ipport()

void IPHelper::rewrite_ipport ( WritablePacket *  p, IPAddress  ip, uint16_t  port, const int  shift, bool  is_tcp  )

inline

Rewrite the src or dst IP address and src or dst port of the packet.

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

• include/click/iphelper.hh