udp_protocol.c File Reference

#include "udp_protocol.h"

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Functions
uint16_t	UDPHeaderCalculateChecksum (const void *udp_packet, const size_t udp_packet_length, const in_addr_t source_addr, const in_addr_t destination_addr)
	Calculates the checksum based on the set UDP packet data and pseudo IP header. More...
void	UDPHeaderGenerate (const UDPHeader *header, char *message)
	Generate the UDP header in the message according to the header. More...
uint16_t	UDPHeaderGetChecksum (const UDPHeader *const header)
	Gets checksum field. More...
uint16_t	UDPHeaderGetDestinationPort (const UDPHeader *const header)
	Gets destination port field. More...
uint16_t	UDPHeaderGetPacketLength (const UDPHeader *const header)
	Gets packet length field. More...
uint16_t	UDPHeaderGetSourcePort (const UDPHeader *const header)
	Gets source port field. More...
void	UDPHeaderSetChecksum (UDPHeader *const header, const uint16_t checksum)
	Sets checksum field. More...
void	UDPHeaderSetDestinationPort (UDPHeader *const header, const uint16_t destination_port)
	Sets destination port field. More...
void	UDPHeaderSetPacketLength (UDPHeader *const header, const uint16_t packet_length)
	Sets packet length field. More...
void	UDPHeaderSetSourcePort (UDPHeader *const header, const uint16_t source_port)
	Sets source port field. More...

Function Documentation

uint16_t UDPHeaderCalculateChecksum	(	const void *	udp_packet,
		const size_t	udp_packet_length,
		const in_addr_t	source_addr,
		const in_addr_t	destination_addr
	)

Calculates the checksum based on the set UDP packet data and pseudo IP header.

Parameters

udp_packet	the UDP packet including the UDP header
udp_packet_length	UPD packet length
source_addr	The IP source address
destination_addr	The IP destination address

Returns

The calculated checksum

Definition at line 61 of file udp_protocol.c.

Referenced by SendUdpData().

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void UDPHeaderGenerate	(	const UDPHeader *	header,
		char *	message
	)

Generate the UDP header in the message according to the header.

The function generates the UDP header according to the header struct overwriting the first 8 bytes

Parameters

header	The UDP header struct instance
message	The message buffer

Definition at line 49 of file udp_protocol.c.

References UDPHeaderGetChecksum(), UDPHeaderGetDestinationPort(), UDPHeaderGetPacketLength(), and UDPHeaderGetSourcePort().

Referenced by SendUdpData().

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uint16_t UDPHeaderGetChecksum

(

const UDPHeader *const

header

)

Gets checksum field.

Parameters

header

The UDP header struct instance

Returns

The packet length

Definition at line 45 of file udp_protocol.c.

References UDPHeader::checksum.

Referenced by UDPHeaderGenerate().

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uint16_t UDPHeaderGetDestinationPort

(

const UDPHeader *const

header

)

Gets destination port field.

Parameters

header

The header struct instance

Returns

The destination port

Definition at line 27 of file udp_protocol.c.

References UDPHeader::destination_port.

Referenced by UDPHeaderGenerate().

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uint16_t UDPHeaderGetPacketLength

(

const UDPHeader *const

header

)

Gets packet length field.

Parameters

header

The header struct instance

Returns

The packet length

Definition at line 36 of file udp_protocol.c.

References UDPHeader::packet_length.

Referenced by UDPHeaderGenerate().

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uint16_t UDPHeaderGetSourcePort

(

const UDPHeader *const

header

)

Gets source port field.

Parameters

header

The header struct instance

Returns

The source port

Definition at line 18 of file udp_protocol.c.

References UDPHeader::source_port.

Referenced by UDPHeaderGenerate().

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void UDPHeaderSetChecksum	(	UDPHeader *const	header,
		const uint16_t	checksum
	)

Sets checksum field.

Parameters

header	The UDP header struct instance
checksum	Checksum value to be set

Definition at line 40 of file udp_protocol.c.

References UDPHeader::checksum.

Referenced by SendUdpData().

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void UDPHeaderSetDestinationPort	(	UDPHeader *const	header,
		const uint16_t	destination_port
	)

Sets destination port field.

Parameters

header	The UDP header struct instance
destination_port	Destination port value to be set

Definition at line 22 of file udp_protocol.c.

References UDPHeader::destination_port.

void UDPHeaderSetPacketLength	(	UDPHeader *const	header,
		const uint16_t	packet_length
	)

Sets packet length field.

Parameters

header	The UDP header struct instance
packet_length	Length value to be set

Definition at line 31 of file udp_protocol.c.

References UDPHeader::packet_length.

void UDPHeaderSetSourcePort	(	UDPHeader *const	header,
		const uint16_t	source_port
	)

Sets source port field.

Parameters

header	The UDP header struct instance
source_port	Source port value to be set

Definition at line 13 of file udp_protocol.c.

References UDPHeader::source_port.