Structure to hold a CoAP message header. More...
#include <coap_api.h>
Data Fields | |
| uint8_t | version:2 |
| uint8_t | type:2 |
| uint8_t | token_len:4 |
| uint8_t | code |
| uint16_t | id |
Structure to hold a CoAP message header.
This structure holds the 4-byte mandatory CoAP header. The structure uses bitfields to save memory footprint.
| uint8_t coap_message_header_t::code |
Message code (definitions found in coap_msg_code_t).
| uint16_t coap_message_header_t::id |
Message ID in little-endian format. Convertion to Network Byte Order will be handled by the library.
| uint8_t coap_message_header_t::token_len |
Length of the message token.
| uint8_t coap_message_header_t::type |
Message type: COAP_TYPE_CON, COAP_TYPE_NON, COAP_TYPE_ACK, or COAP_TYPE_RST.
| uint8_t coap_message_header_t::version |
CoAP version number. The current specification RFC7252 mandates this to be version 1. The version number can be modified in sdk_config.h.