net: coap: Add API to send reset message (e96e95b6) · Commits · Wenxi XU / zephyr

include/zephyr/net/coap.h

+15 −0

Original line number	Diff line number	Diff line
		@@ -552,6 +552,21 @@ int coap_packet_init(struct coap_packet cpkt, uint8_t data, uint16_t max_len,
		int coap_ack_init(struct coap_packet cpkt, const struct coap_packet req,
		uint8_t *data, uint16_t max_len, uint8_t code);

		/**
		* @brief Create a new CoAP Reset message for given request.
		*
		* This function works like @ref coap_packet_init, filling CoAP header type,
		* and CoAP header message id fields.
		*
		* @param cpkt New packet to be initialized using the storage from @a data.
		* @param req CoAP request packet that is being acknowledged
		* @param data Data that will contain a CoAP packet information
		* @param max_len Maximum allowable length of data
		*
		* @return 0 in case of success or negative in case of error.
		*/
		int coap_rst_init(struct coap_packet cpkt, const struct coap_packet req,
		uint8_t *data, uint16_t max_len);
		/**
		* @brief Returns a randomly generated array of 8 bytes, that can be
		* used as a message's token.

+13 −0

Original line number	Diff line number	Diff line
		@@ -232,6 +232,19 @@ int coap_ack_init(struct coap_packet cpkt, const struct coap_packet req,
		token, code, id);
		}

		int coap_rst_init(struct coap_packet cpkt, const struct coap_packet req,
		uint8_t *data, uint16_t max_len)
		{
		uint16_t id;
		uint8_t ver;

		ver = coap_header_get_version(req);
		id = coap_header_get_id(req);

		return coap_packet_init(cpkt, data, max_len, ver, COAP_TYPE_RESET, 0,
		NULL, 0, id);
		}

		static void option_header_set_delta(uint8_t *opt, uint8_t delta)
		{
		*opt = (delta & 0xF) << 4;