CoAP C-library User protocol interface header file. More...

Functions
int16_t	sn_coap_protocol_build (struct coap_s handle, sn_nsdl_addr_s dst_addr_ptr, uint8_t dst_packet_data_ptr, sn_coap_hdr_s src_coap_msg_ptr, void *param)
	Builds Packet data from given CoAP header structure to be sent.
int8_t	sn_coap_protocol_exec (struct coap_s *handle, uint32_t current_time)
	Sends CoAP messages from re-sending queue, if there is any.
void	sn_coap_protocol_clear_retransmission_buffer (struct coap_s *handle)
	If re-transmissions are enabled, this function removes all messages from the retransmission queue.

Detailed Description

CoAP C-library User protocol interface header file.

Definition in file sn_coap_protocol.h.

Function Documentation

Builds Packet data from given CoAP header structure to be sent.

Parameters:

*dst_addr_ptr	is pointer to destination address where CoAP message will be sent (CoAP builder needs that information for message resending purposes)
*dst_packet_data_ptr	is pointer to destination of built Packet data
*src_coap_msg_ptr	is pointer to source of built Packet data
param	void pointer that will be passed to tx/rx function callback when those are called.

Returns:: Return value is byte count of built Packet data.
Note: If message is blockwised, all payload is not sent at the same time
In failure cases:
-1 = Failure in CoAP header structure
-2 = Failure in given pointer (= NULL)
-3 = Failure in Reset message\ŋ If there is not enough memory (or User given limit exceeded) for storing resending messages, situation is ignored.

Definition at line 391 of file sn_coap_protocol.c.

void sn_coap_protocol_clear_retransmission_buffer ( struct coap_s * handle )

If re-transmissions are enabled, this function removes all messages from the retransmission queue.

Parameters:

*handle Pointer to CoAP library handle

Definition at line 295 of file sn_coap_protocol.c.

Sends CoAP messages from re-sending queue, if there is any.

Cleans also old messages from the duplication list and from block receiving list

This function can be called e.g. once in a second but also more frequently.

Parameters:

*handle	Pointer to CoAP library handle
current_time	is System time in seconds. This time is used for message re-sending timing and to identify old saved data.

Definition at line 721 of file sn_coap_protocol.c.