udp.h File Reference

Utility functions for managing UDP sockets. More...

#include <freeradius-devel/build.h>
#include <freeradius-devel/missing.h>
#include <freeradius-devel/util/inet.h>
#include <freeradius-devel/util/socket.h>
#include <freeradius-devel/util/time.h>
#include <freeradius-devel/util/udpfromto.h>

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Macros
#define	UDP_FLAGS_CONNECTED   (1 << 0)
#define	UDP_FLAGS_NONE   (0)
#define	UDP_FLAGS_PEEK   (1 << 1)

Functions
ssize_t	udp_recv (int sockfd, int flags, fr_socket_t *socket_out, void *data, size_t data_len, fr_time_t *when)
	Read a UDP packet. More...
int	udp_recv_discard (int sockfd)
	Discard the next UDP packet. More...
ssize_t	udp_recv_peek (int sockfd, void *data, size_t data_len, int flags, fr_ipaddr_t *src_ipaddr, uint16_t *src_port)
	Peek at the header of a UDP packet. More...
int	udp_send (fr_socket_t const *socket, int flags, void *data, size_t data_len)
	Send a packet via a UDP socket. More...

Detailed Description

Utility functions for managing UDP sockets.

Copyright

2015 The FreeRADIUS server project

Definition in file udp.h.

Macro Definition Documentation

UDP_FLAGS_CONNECTED

#define UDP_FLAGS_CONNECTED   (1 << 0)

Definition at line 38 of file udp.h.

UDP_FLAGS_NONE

#define UDP_FLAGS_NONE   (0)

Definition at line 37 of file udp.h.

UDP_FLAGS_PEEK

#define UDP_FLAGS_PEEK   (1 << 1)

Definition at line 39 of file udp.h.

Function Documentation

udp_recv()

ssize_t udp_recv	(	int	sockfd,
		int	flags,
		fr_socket_t *	socket_out,
		void *	data,
		size_t	data_len,
		fr_time_t *	when
	)

Read a UDP packet.

Parameters

[in]	sockfd	we're reading from.
[in]	flags	for things
[out]	socket_out	Information about the src/dst address of the packet and the interface it was received on.
[out]	data	pointer where data will be written
[in]	data_len	length of data to read
[out]	when	the packet was received.

Returns

• > 0 on success (number of bytes read).
• < 0 on failure.

Definition at line 145 of file udp.c.

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udp_recv_discard()

int udp_recv_discard

(

int

sockfd

)

Discard the next UDP packet.

Parameters

[in]

sockfd

we're reading from.

Definition at line 76 of file udp.c.

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udp_recv_peek()

ssize_t udp_recv_peek	(	int	sockfd,
		void *	data,
		size_t	data_len,
		int	flags,
		fr_ipaddr_t *	src_ipaddr,
		uint16_t *	src_port
	)

Peek at the header of a UDP packet.

Parameters

[in]	sockfd	we're reading from.
[out]	data	pointer where data will be written
[in]	data_len	length of data to read
[in]	flags	for things
[out]	src_ipaddr	of the packet.
[out]	src_port	of the packet.

Definition at line 96 of file udp.c.

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udp_send()

int udp_send	(	fr_socket_t const *	sock,
		int	flags,
		void *	data,
		size_t	data_len
	)

Send a packet via a UDP socket.

Parameters

[in]	sock	we're reading from.
[in]	flags	to pass to send(), or sendto()
[in]	data	to data to send
[in]	data_len	length of data to send

Returns

• 0 on success.
• -1 on failure.

Definition at line 43 of file udp.c.

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