Datagram (UDP) Support

Internal API for handling CoAP Datagrams (UDP) (RFC7252) More...

Collaboration diagram for Datagram (UDP) Support:

Functions
int	coap_socket_connect_udp (coap_socket_t *sock, const coap_address_t *local_if, const coap_address_t *server, int default_port, coap_address_t *local_addr, coap_address_t *remote_addr)
	Create a new UDP socket and 'connect' it to the address tuple.
int	coap_socket_bind_udp (coap_socket_t *sock, const coap_address_t *listen_addr, coap_address_t *bound_addr)
	Create a new UDP socket and then listen for new incoming UDP sessions to the specified IP address and port.
ssize_t	coap_socket_send (coap_socket_t *sock, coap_session_t *session, const uint8_t *data, size_t datalen)
	Function interface for data transmission.
ssize_t	coap_socket_recv (coap_socket_t *sock, coap_packet_t *packet)
	Function interface for reading data.
void	coap_socket_close (coap_socket_t *sock)
	Function interface to close off a socket (for both TCP and UDP).

Detailed Description

Internal API for handling CoAP Datagrams (UDP) (RFC7252)

Function Documentation

coap_socket_bind_udp()

int coap_socket_bind_udp	(	coap_socket_t *	sock,
		const coap_address_t *	listen_addr,
		coap_address_t *	bound_addr
	)

Create a new UDP socket and then listen for new incoming UDP sessions to the specified IP address and port.

Internal function.

Parameters

sock	Where socket information is to be filled in.
listen_addr	The address to be listening for new incoming sessions.
bound_addr	Filled in with the address that the UDP layer. is listening on for new incoming UDP sessions.

Returns

1 if succesful, 0 if failure of some sort

coap_socket_close()

void coap_socket_close

(

coap_socket_t *

sock

)

Function interface to close off a socket (for both TCP and UDP).

Parameters

sock	Socket to close.

Definition at line 395 of file coap_io.c.

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coap_socket_connect_udp()

int coap_socket_connect_udp	(	coap_socket_t *	sock,
		const coap_address_t *	local_if,
		const coap_address_t *	server,
		int	default_port,
		coap_address_t *	local_addr,
		coap_address_t *	remote_addr
	)

Create a new UDP socket and 'connect' it to the address tuple.

Internal function.

Parameters

sock	Where socket information is to be filled in.
local_if	The local address to use or NULL.
server	The address to connect to.
default_port	The port to use if not set in server.
local_addr	Filled in after connection initiation with the local address.
remote_addr	Filled in after connection initiation with the remote address.

Returns

1 if succesful, 0 if failure of some sort.

coap_socket_recv()

ssize_t coap_socket_recv	(	coap_socket_t *	sock,
		coap_packet_t *	packet
	)

Function interface for reading data.

This function returns the number of bytes that have been read, or a value less than zero on error. In case of an error, *packet is set to NULL.

Internal function.

Parameters

sock	Socket to read data from.
packet	Received packet metadata and payload. src and dst should be preset.

Returns

The number of bytes received on success, or a value less than zero on error.

Definition at line 1070 of file coap_io.c.

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coap_socket_send()

ssize_t coap_socket_send	(	coap_socket_t *	sock,
		coap_session_t *	session,
		const uint8_t *	data,
		size_t	datalen
	)

Function interface for data transmission.

This function returns the number of bytes that have been transmitted, or a value less than zero on error.

Internal function.

Parameters

sock	Socket to send data over.
session	Addressing information for unconnected sockets, or NULL
data	The data to send.
datalen	The actual length of data.

Returns

The number of bytes written on success, or a value less than zero on error.

Definition at line 869 of file coap_io.c.

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