minirighi_udp_checksum.h File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <netinet/in.h>

Go to the source code of this file.

Functions
uint16_t	minirighi_udp_checksum (const void *buff, size_t len, in_addr_t src_addr, in_addr_t dest_addr)
	Calculate the UDP checksum (calculated with the whole packet) More...

Detailed Description

UDP checksum calculation utility - from the Minirighi IA-32 Operating System

This header file gives access to a function (minirighi_udp_checksum()) that can be used to compute the UDP checksum to be put inside the corresponding field of the UDP header.

This is not an original work: this function comes from the Minirighi IA-32 Operating System, released under GNU GPL. Except for the name, there is no modification to its code.

Moreover, the original definition can be found at line 29 of file udp.c of the Minirighi system.

The function, even though it is used internally in the main Rawsock module, is available through a separate header in order to enable any application to use it separately, when needed.

Version

Rawsock library verion: 0.3.4

Author

Andrea Righi drizz.nosp@m.t@in.nosp@m.wind..nosp@m.it

Date

2003-01-21 Andrea Righi: Suppressed deferencing type-punned pointer warning.

Copyright

Licensed under GPLv2, (c) 2003 Andrea Righi

Definition in file minirighi_udp_checksum.h.

Function Documentation

uint16_t minirighi_udp_checksum	(	const void *	buff,
		size_t	len,
		in_addr_t	src_addr,
		in_addr_t	dest_addr
	)

Calculate the UDP checksum (calculated with the whole packet)

Note

This documentation is coded to reflect exactly the one provided for the Minirighi Opearing System, available here.

Parameters

[in]	buff	The UDP packet.
[in]	len	The UDP packet length.
[in]	src_addr	The IP source address (in network format).
[in]	dest_addr	The IP destination address (in network format).

Returns

The result of the checksum.

Definition at line 18 of file minirighi_udp_checksum.c.