udp_socket.c File Reference

Easily create and use UDP sockets. More...

#include "udp_socket.h"
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

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Macros
#define	TRACE(type, fmt, args...)
#define	TRACE_ERROR   1

Functions
int	udp_socket_create (struct UdpSocket *sock, char *host, int port_out, int port_in, bool broadcast)
	Create UDP socket and bind it. More...
int	udp_socket_send (struct UdpSocket *sock, uint8_t *buffer, uint32_t len)
	Send a packet from buffer, blocking. More...
int	udp_socket_send_dontwait (struct UdpSocket *sock, uint8_t *buffer, uint32_t len)
	Send a packet from buffer, non-blocking. More...
int	udp_socket_recv_dontwait (struct UdpSocket *sock, uint8_t *buffer, uint32_t len)
	Receive a UDP packet, dont wait. More...
int	udp_socket_recv (struct UdpSocket *sock, uint8_t *buffer, uint32_t len)
	Receive one UDP packet, blocking. More...
int	udp_socket_subscribe_multicast (struct UdpSocket *sock, const char *multicast_addr)
int	udp_socket_set_recvbuf (struct UdpSocket *sock, int buf_size)
int	udp_socket_set_sendbuf (struct UdpSocket *sock, int buf_size)

Detailed Description

Easily create and use UDP sockets.

Definition in file udp_socket.c.

Macro Definition Documentation

TRACE

#define TRACE	(		type,
			fmt,
			args...
	)

Definition at line 37 of file udp_socket.c.

TRACE_ERROR

#define TRACE_ERROR   1

Definition at line 38 of file udp_socket.c.

Function Documentation

udp_socket_create()

int udp_socket_create	(	struct UdpSocket *	sock,
		char *	host,
		int	port_out,
		int	port_in,
		bool	broadcast
	)

Create UDP socket and bind it.

Create UDP network (in/out sockets).

Parameters

[out]	sock	pointer to already allocated UdpSocket struct
[in]	host	ip address or hostname (hostname not possible if static linking)
[in]	port_out	output port
[in]	port_in	input port (set to < 0 to disable)
[in]	broadcast	if TRUE enable broadcasting

Returns

-1 on error, otherwise 0

Definition at line 49 of file udp_socket.c.

References UdpSocket::addr_in, UdpSocket::addr_out, and UdpSocket::sockfd.

Referenced by udp_arch_periph_init(), and viewvideo_init().

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udp_socket_recv()

int udp_socket_recv	(	struct UdpSocket *	sock,
		uint8_t *	buffer,
		uint32_t	len
	)

Receive one UDP packet, blocking.

Receive one UDP packet.

Parameters

[in]	sock	pointer to UdpSocket struct
[out]	buffer	buffer to write received packet to
[in]	len	buffer length in bytes (maximum bytes to read)

Returns

number of bytes received (-1 on error)

Definition at line 185 of file udp_socket.c.

References UdpSocket::addr_in, and UdpSocket::sockfd.

udp_socket_recv_dontwait()

int udp_socket_recv_dontwait	(	struct UdpSocket *	sock,
		uint8_t *	buffer,
		uint32_t	len
	)

Receive a UDP packet, dont wait.

Sets the MSG_DONTWAIT flag, returns 0 if no data is available.

Parameters

[in]	sock	pointer to UdpSocket struct
[out]	buffer	buffer to write received packet to
[in]	len	buffer length in bytes

Returns

number of bytes received (-1 on error)

Definition at line 160 of file udp_socket.c.

References UdpSocket::addr_in, UdpSocket::sockfd, TRACE, and TRACE_ERROR.

udp_socket_send()

int udp_socket_send	(	struct UdpSocket *	sock,
		uint8_t *	buffer,
		uint32_t	len
	)

Send a packet from buffer, blocking.

Parameters

[in]	sock	pointer to UdpSocket struct
[in]	buffer	buffer to send
[in]	len	buffer length in bytes

Returns

number of bytes sent (-1 on error)

Definition at line 120 of file udp_socket.c.

References UdpSocket::addr_out, UdpSocket::sockfd, TRACE, and TRACE_ERROR.

udp_socket_send_dontwait()

int udp_socket_send_dontwait	(	struct UdpSocket *	sock,
		uint8_t *	buffer,
		uint32_t	len
	)

Send a packet from buffer, non-blocking.

Parameters

[in]	sock	pointer to UdpSocket struct
[in]	buffer	buffer to send
[in]	len	buffer length in bytes

Returns

number of bytes sent (-1 on error)

Definition at line 141 of file udp_socket.c.

References UdpSocket::addr_out, and UdpSocket::sockfd.

Referenced by rtp_packet_send().

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udp_socket_set_recvbuf()

int udp_socket_set_recvbuf	(	struct UdpSocket *	sock,
		int	buf_size
	)

Definition at line 205 of file udp_socket.c.

References UdpSocket::sockfd.

udp_socket_set_sendbuf()

int udp_socket_set_sendbuf	(	struct UdpSocket *	sock,
		int	buf_size
	)

Definition at line 220 of file udp_socket.c.

References UdpSocket::sockfd.

udp_socket_subscribe_multicast()

int udp_socket_subscribe_multicast	(	struct UdpSocket *	sock,
		const char *	multicast_addr
	)

Definition at line 194 of file udp_socket.c.

References UdpSocket::sockfd.