COAP library. More...

Data Structures
struct	coap_resource
	Description of CoAP resource. More...

struct	coap_observer
	Represents a remote device that is observing a local resource. More...

struct	coap_packet
	Representation of a CoAP Packet. More...

struct	coap_option
	Representation of a CoAP option. More...

struct	coap_transmission_parameters
	CoAP transmission parameters. More...

struct	coap_pending
	Represents a request awaiting for an acknowledgment (ACK). More...

struct	coap_reply
	Represents the handler for the reply of a request, it is also used when observing resources. More...

struct	coap_block_context
	Represents the current state of a block-wise transaction. More...

struct	coap_core_metadata
	In case you want to add attributes to the resources included in the 'well-known/core' "virtual" resource, the 'user_data' field should point to a valid coap_core_metadata structure. More...

Macros
#define	COAP_MAKE_RESPONSE_CODE(class, det) ((class << 5) \| (det))
	Utility macro to create a CoAP response code.

#define	COAP_WELL_KNOWN_CORE_PATH ((const char * const[]) { ".well-known", "core", NULL })
	This resource should be added before all other resources that should be included in the responses of the .well-known/core resource if is to be used with coap_well_known_core_get.

Typedefs
typedef int(*	coap_method_t) (struct coap_resource resource, struct coap_packet request, struct sockaddr *addr, socklen_t addr_len)
	Type of the callback being called when a resource's method is invoked by the remote entity.

typedef void(*	coap_notify_t) (struct coap_resource resource, struct coap_observer observer)
	Type of the callback being called when a resource's has observers to be informed when an update happens.

typedef int(*	coap_reply_t) (const struct coap_packet response, struct coap_reply reply, const struct sockaddr *from)
	Helper function to be called when a response matches the a pending request.

Enumerations
enum	coap_option_num { COAP_OPTION_IF_MATCH = 1 , COAP_OPTION_URI_HOST = 3 , COAP_OPTION_ETAG = 4 , COAP_OPTION_IF_NONE_MATCH = 5 , COAP_OPTION_OBSERVE = 6 , COAP_OPTION_URI_PORT = 7 , COAP_OPTION_LOCATION_PATH = 8 , COAP_OPTION_URI_PATH = 11 , COAP_OPTION_CONTENT_FORMAT = 12 , COAP_OPTION_MAX_AGE = 14 , COAP_OPTION_URI_QUERY = 15 , COAP_OPTION_ACCEPT = 17 , COAP_OPTION_LOCATION_QUERY = 20 , COAP_OPTION_BLOCK2 = 23 , COAP_OPTION_BLOCK1 = 27 , COAP_OPTION_SIZE2 = 28 , COAP_OPTION_PROXY_URI = 35 , COAP_OPTION_PROXY_SCHEME = 39 , COAP_OPTION_SIZE1 = 60 , COAP_OPTION_ECHO = 252 , COAP_OPTION_REQUEST_TAG = 292 }
	Set of CoAP packet options we are aware of. More...

enum	coap_method { COAP_METHOD_GET = 1 , COAP_METHOD_POST = 2 , COAP_METHOD_PUT = 3 , COAP_METHOD_DELETE = 4 , COAP_METHOD_FETCH = 5 , COAP_METHOD_PATCH = 6 , COAP_METHOD_IPATCH = 7 }
	Available request methods. More...

enum	coap_msgtype { COAP_TYPE_CON = 0 , COAP_TYPE_NON_CON = 1 , COAP_TYPE_ACK = 2 , COAP_TYPE_RESET = 3 }
	CoAP packets may be of one of these types. More...

enum	coap_response_code { COAP_RESPONSE_CODE_OK = (( 2 << 5) \| ( 0 )) , COAP_RESPONSE_CODE_CREATED = (( 2 << 5) \| ( 1 )) , COAP_RESPONSE_CODE_DELETED = (( 2 << 5) \| ( 2 )) , COAP_RESPONSE_CODE_VALID = (( 2 << 5) \| ( 3 )) , COAP_RESPONSE_CODE_CHANGED = (( 2 << 5) \| ( 4 )) , COAP_RESPONSE_CODE_CONTENT = (( 2 << 5) \| ( 5 )) , COAP_RESPONSE_CODE_CONTINUE = (( 2 << 5) \| ( 31 )) , COAP_RESPONSE_CODE_BAD_REQUEST = (( 4 << 5) \| ( 0 )) , COAP_RESPONSE_CODE_UNAUTHORIZED = (( 4 << 5) \| ( 1 )) , COAP_RESPONSE_CODE_BAD_OPTION = (( 4 << 5) \| ( 2 )) , COAP_RESPONSE_CODE_FORBIDDEN = (( 4 << 5) \| ( 3 )) , COAP_RESPONSE_CODE_NOT_FOUND = (( 4 << 5) \| ( 4 )) , COAP_RESPONSE_CODE_NOT_ALLOWED = (( 4 << 5) \| ( 5 )) , COAP_RESPONSE_CODE_NOT_ACCEPTABLE = (( 4 << 5) \| ( 6 )) , COAP_RESPONSE_CODE_INCOMPLETE = (( 4 << 5) \| ( 8 )) , COAP_RESPONSE_CODE_CONFLICT = (( 4 << 5) \| ( 9 )) , COAP_RESPONSE_CODE_PRECONDITION_FAILED = (( 4 << 5) \| ( 12 )) , COAP_RESPONSE_CODE_REQUEST_TOO_LARGE = (( 4 << 5) \| ( 13 )) , COAP_RESPONSE_CODE_UNSUPPORTED_CONTENT_FORMAT , COAP_RESPONSE_CODE_UNPROCESSABLE_ENTITY = (( 4 << 5) \| ( 22 )) , COAP_RESPONSE_CODE_TOO_MANY_REQUESTS = (( 4 << 5) \| ( 29 )) , COAP_RESPONSE_CODE_INTERNAL_ERROR = (( 5 << 5) \| ( 0 )) , COAP_RESPONSE_CODE_NOT_IMPLEMENTED = (( 5 << 5) \| ( 1 )) , COAP_RESPONSE_CODE_BAD_GATEWAY = (( 5 << 5) \| ( 2 )) , COAP_RESPONSE_CODE_SERVICE_UNAVAILABLE = (( 5 << 5) \| ( 3 )) , COAP_RESPONSE_CODE_GATEWAY_TIMEOUT = (( 5 << 5) \| ( 4 )) , COAP_RESPONSE_CODE_PROXYING_NOT_SUPPORTED }
	Set of response codes available for a response packet. More...

enum	coap_content_format { COAP_CONTENT_FORMAT_TEXT_PLAIN = 0 , COAP_CONTENT_FORMAT_APP_LINK_FORMAT = 40 , COAP_CONTENT_FORMAT_APP_XML = 41 , COAP_CONTENT_FORMAT_APP_OCTET_STREAM = 42 , COAP_CONTENT_FORMAT_APP_EXI = 47 , COAP_CONTENT_FORMAT_APP_JSON = 50 , COAP_CONTENT_FORMAT_APP_JSON_PATCH_JSON = 51 , COAP_CONTENT_FORMAT_APP_MERGE_PATCH_JSON = 52 , COAP_CONTENT_FORMAT_APP_CBOR = 60 }
	Set of Content-Format option values for CoAP. More...

enum	coap_block_size { COAP_BLOCK_16 , COAP_BLOCK_32 , COAP_BLOCK_64 , COAP_BLOCK_128 , COAP_BLOCK_256 , COAP_BLOCK_512 , COAP_BLOCK_1024 }
	Represents the size of each block that will be transferred using block-wise transfers [RFC7959]: More...

Functions
uint8_t	coap_header_get_version (const struct coap_packet *cpkt)
	Returns the version present in a CoAP packet.

uint8_t	coap_header_get_type (const struct coap_packet *cpkt)
	Returns the type of the CoAP packet.

uint8_t	coap_header_get_token (const struct coap_packet cpkt, uint8_t token)
	Returns the token (if any) in the CoAP packet.

uint8_t	coap_header_get_code (const struct coap_packet *cpkt)
	Returns the code of the CoAP packet.

int	coap_header_set_code (const struct coap_packet *cpkt, uint8_t code)
	Modifies the code of the CoAP packet.

uint16_t	coap_header_get_id (const struct coap_packet *cpkt)
	Returns the message id associated with the CoAP packet.

const uint8_t *	coap_packet_get_payload (const struct coap_packet cpkt, uint16_t len)
	Returns the data pointer and length of the CoAP packet.

bool	coap_uri_path_match (const char const path, struct coap_option *options, uint8_t opt_num)
	Verify if CoAP URI path matches with provided options.

int	coap_packet_parse (struct coap_packet cpkt, uint8_t data, uint16_t len, struct coap_option *options, uint8_t opt_num)
	Parses the CoAP packet in data, validating it and initializing cpkt.

int	coap_packet_set_path (struct coap_packet cpkt, const char path)
	Parses provided coap path (with/without query) or query and appends that as options to the cpkt.

int	coap_packet_init (struct coap_packet cpkt, uint8_t data, uint16_t max_len, uint8_t ver, uint8_t type, uint8_t token_len, const uint8_t *token, uint8_t code, uint16_t id)
	Creates a new CoAP Packet from input data.

int	coap_ack_init (struct coap_packet cpkt, const struct coap_packet req, uint8_t *data, uint16_t max_len, uint8_t code)
	Create a new CoAP Acknowledgment message for given request.

uint8_t *	coap_next_token (void)
	Returns a randomly generated array of 8 bytes, that can be used as a message's token.

uint16_t	coap_next_id (void)
	Helper to generate message ids.

int	coap_find_options (const struct coap_packet cpkt, uint16_t code, struct coap_option options, uint16_t veclen)
	Return the values associated with the option of value code.

int	coap_packet_append_option (struct coap_packet cpkt, uint16_t code, const uint8_t value, uint16_t len)
	Appends an option to the packet.

int	coap_packet_remove_option (struct coap_packet *cpkt, uint16_t code)
	Remove an option from the packet.

unsigned int	coap_option_value_to_int (const struct coap_option *option)
	Converts an option to its integer representation.

int	coap_append_option_int (struct coap_packet *cpkt, uint16_t code, unsigned int val)
	Appends an integer value option to the packet.

int	coap_packet_append_payload_marker (struct coap_packet *cpkt)
	Append payload marker to CoAP packet.

int	coap_packet_append_payload (struct coap_packet cpkt, const uint8_t payload, uint16_t payload_len)
	Append payload to CoAP packet.

bool	coap_packet_is_request (const struct coap_packet *cpkt)
	Check if a CoAP packet is a CoAP request.

int	coap_handle_request_len (struct coap_packet cpkt, struct coap_resource resources, size_t resources_len, struct coap_option options, uint8_t opt_num, struct sockaddr addr, socklen_t addr_len)
	When a request is received, call the appropriate methods of the matching resources.

int	coap_handle_request (struct coap_packet cpkt, struct coap_resource resources, struct coap_option options, uint8_t opt_num, struct sockaddr addr, socklen_t addr_len)
	When a request is received, call the appropriate methods of the matching resources.

static uint16_t	coap_block_size_to_bytes (enum coap_block_size block_size)
	Helper for converting the enumeration to the size expressed in bytes.

static enum coap_block_size	coap_bytes_to_block_size (uint16_t bytes)
	Helper for converting block size in bytes to enumeration.

int	coap_block_transfer_init (struct coap_block_context *ctx, enum coap_block_size block_size, size_t total_size)
	Initializes the context of a block-wise transfer.

int	coap_append_descriptive_block_option (struct coap_packet cpkt, struct coap_block_context ctx)
	Append BLOCK1 or BLOCK2 option to the packet.

bool	coap_has_descriptive_block_option (struct coap_packet *cpkt)
	Check if a descriptive block option is set in the packet.

int	coap_remove_descriptive_block_option (struct coap_packet *cpkt)
	Remove BLOCK1 or BLOCK2 option from the packet.

bool	coap_block_has_more (struct coap_packet *cpkt)
	Check if BLOCK1 or BLOCK2 option has more flag set.

int	coap_append_block1_option (struct coap_packet cpkt, struct coap_block_context ctx)
	Append BLOCK1 option to the packet.

int	coap_append_block2_option (struct coap_packet cpkt, struct coap_block_context ctx)
	Append BLOCK2 option to the packet.

int	coap_append_size1_option (struct coap_packet cpkt, struct coap_block_context ctx)
	Append SIZE1 option to the packet.

int	coap_append_size2_option (struct coap_packet cpkt, struct coap_block_context ctx)
	Append SIZE2 option to the packet.

int	coap_get_option_int (const struct coap_packet *cpkt, uint16_t code)
	Get the integer representation of a CoAP option.

int	coap_get_block1_option (const struct coap_packet cpkt, bool has_more, uint8_t *block_number)
	Get the block size, more flag and block number from the CoAP block1 option.

int	coap_get_block2_option (const struct coap_packet cpkt, uint8_t block_number)
	Get values from CoAP block2 option.

int	coap_update_from_block (const struct coap_packet cpkt, struct coap_block_context ctx)
	Retrieves BLOCK{1,2} and SIZE{1,2} from cpkt and updates ctx accordingly.

int	coap_next_block_for_option (const struct coap_packet cpkt, struct coap_block_context ctx, enum coap_option_num option)
	Updates ctx according to option set in cpkt so after this is called the current entry indicates the correct offset in the body of data being transferred.

size_t	coap_next_block (const struct coap_packet cpkt, struct coap_block_context ctx)
	Updates ctx so after this is called the current entry indicates the correct offset in the body of data being transferred.

void	coap_observer_init (struct coap_observer observer, const struct coap_packet request, const struct sockaddr *addr)
	Indicates that the remote device referenced by addr, with request, wants to observe a resource.

bool	coap_register_observer (struct coap_resource resource, struct coap_observer observer)
	After the observer is initialized, associate the observer with an resource.

bool	coap_remove_observer (struct coap_resource resource, struct coap_observer observer)
	Remove this observer from the list of registered observers of that resource.

struct coap_observer *	coap_find_observer (struct coap_observer observers, size_t len, const struct sockaddr addr, const uint8_t *token, uint8_t token_len)
	Returns the observer that matches address addr and has token token.

struct coap_observer *	coap_find_observer_by_addr (struct coap_observer observers, size_t len, const struct sockaddr addr)
	Returns the observer that matches address addr.

struct coap_observer *	coap_find_observer_by_token (struct coap_observer observers, size_t len, const uint8_t token, uint8_t token_len)
	Returns the observer that has token token.

struct coap_observer *	coap_observer_next_unused (struct coap_observer *observers, size_t len)
	Returns the next available observer representation.

void	coap_reply_init (struct coap_reply reply, const struct coap_packet request)
	Indicates that a reply is expected for request.

int	coap_pending_init (struct coap_pending pending, const struct coap_packet request, const struct sockaddr addr, const struct coap_transmission_parameters params)
	Initialize a pending request with a request.

struct coap_pending *	coap_pending_next_unused (struct coap_pending *pendings, size_t len)
	Returns the next available pending struct, that can be used to track the retransmission status of a request.

struct coap_reply *	coap_reply_next_unused (struct coap_reply *replies, size_t len)
	Returns the next available reply struct, so it can be used to track replies and notifications received.

struct coap_pending *	coap_pending_received (const struct coap_packet response, struct coap_pending pendings, size_t len)
	After a response is received, returns if there is any matching pending request exits.

struct coap_reply *	coap_response_received (const struct coap_packet response, const struct sockaddr from, struct coap_reply *replies, size_t len)
	After a response is received, call coap_reply_t handler registered in coap_reply structure.

struct coap_pending *	coap_pending_next_to_expire (struct coap_pending *pendings, size_t len)
	Returns the next pending about to expire, pending->timeout informs how many ms to next expiration.

bool	coap_pending_cycle (struct coap_pending *pending)
	After a request is sent, user may want to cycle the pending retransmission so the timeout is updated.

void	coap_pending_clear (struct coap_pending *pending)
	Cancels the pending retransmission, so it again becomes available.

void	coap_pendings_clear (struct coap_pending *pendings, size_t len)
	Cancels all pending retransmissions, so they become available again.

size_t	coap_pendings_count (struct coap_pending *pendings, size_t len)
	Count number of pending requests.

void	coap_reply_clear (struct coap_reply *reply)
	Cancels awaiting for this reply, so it becomes available again.

void	coap_replies_clear (struct coap_reply *replies, size_t len)
	Cancels all replies, so they become available again.

int	coap_resource_notify (struct coap_resource *resource)
	Indicates that this resource was updated and that the notify callback should be called for every registered observer.

bool	coap_request_is_observe (const struct coap_packet *request)
	Returns if this request is enabling observing a resource.

struct coap_transmission_parameters	coap_get_transmission_parameters (void)
	Get currently active CoAP transmission parameters.

void	coap_set_transmission_parameters (const struct coap_transmission_parameters *params)
	Set CoAP transmission parameters.

int	coap_well_known_core_get (struct coap_resource resource, const struct coap_packet request, struct coap_packet response, uint8_t data, uint16_t data_len)
	Build a CoAP response for a .well-known/core CoAP request.

int	coap_well_known_core_get_len (struct coap_resource resources, size_t resources_len, const struct coap_packet request, struct coap_packet response, uint8_t data, uint16_t data_len)
	Build a CoAP response for a .well-known/core CoAP request.

Detailed Description

COAP library.

Since: 1.10

Version: 0.8.0

Macro Definition Documentation

◆ COAP_MAKE_RESPONSE_CODE

#define COAP_MAKE_RESPONSE_CODE	(	class,
		det
	)	((class << 5) \| (det))

#include <zephyr/net/coap.h>

Utility macro to create a CoAP response code.

Parameters

class	Class of the response code (ex. 2, 4, 5, ...)
det	Detail of the response code

Returns: Response code literal

◆ COAP_WELL_KNOWN_CORE_PATH

#define COAP_WELL_KNOWN_CORE_PATH ((const char * const[]) { ".well-known", "core", NULL })

#include <zephyr/net/coap_link_format.h>

This resource should be added before all other resources that should be included in the responses of the .well-known/core resource if is to be used with coap_well_known_core_get.

Typedef Documentation

◆ coap_method_t

coap_method_t

#include <zephyr/net/coap.h>

Type of the callback being called when a resource's method is invoked by the remote entity.

◆ coap_notify_t

coap_notify_t

#include <zephyr/net/coap.h>

Type of the callback being called when a resource's has observers to be informed when an update happens.

◆ coap_reply_t

coap_reply_t

#include <zephyr/net/coap.h>

Helper function to be called when a response matches the a pending request.

When sending blocks, the callback is only executed when the reply of the last block is received. i.e. it is not called when the code of the reply is 'continue' (2.31).

Enumeration Type Documentation

◆ coap_block_size

enum coap_block_size

#include <zephyr/net/coap.h>

Represents the size of each block that will be transferred using block-wise transfers [RFC7959]:

Each entry maps directly to the value that is used in the wire.

https://tools.ietf.org/html/rfc7959

Enumerator
COAP_BLOCK_16	16-byte block size
COAP_BLOCK_32	32-byte block size
COAP_BLOCK_64	64-byte block size
COAP_BLOCK_128	128-byte block size
COAP_BLOCK_256	256-byte block size
COAP_BLOCK_512	512-byte block size
COAP_BLOCK_1024	1024-byte block size

◆ coap_content_format

enum coap_content_format

#include <zephyr/net/coap.h>

Set of Content-Format option values for CoAP.

To be used when encoding or decoding a Content-Format option.

Enumerator
COAP_CONTENT_FORMAT_TEXT_PLAIN	text/plain;charset=utf-8
COAP_CONTENT_FORMAT_APP_LINK_FORMAT	application/link-format
COAP_CONTENT_FORMAT_APP_XML	application/xml
COAP_CONTENT_FORMAT_APP_OCTET_STREAM	application/octet-stream
COAP_CONTENT_FORMAT_APP_EXI	application/exi
COAP_CONTENT_FORMAT_APP_JSON	application/json
COAP_CONTENT_FORMAT_APP_JSON_PATCH_JSON	application/json-patch+json
COAP_CONTENT_FORMAT_APP_MERGE_PATCH_JSON	application/merge-patch+json
COAP_CONTENT_FORMAT_APP_CBOR	application/cbor

◆ coap_method

enum coap_method

#include <zephyr/net/coap.h>

Available request methods.

To be used when creating a request or a response.

Enumerator
COAP_METHOD_GET	GET.
COAP_METHOD_POST	POST.
COAP_METHOD_PUT	PUT.
COAP_METHOD_DELETE	DELETE.
COAP_METHOD_FETCH	FETCH.
COAP_METHOD_PATCH	PATCH.
COAP_METHOD_IPATCH	IPATCH.

◆ coap_msgtype

enum coap_msgtype

#include <zephyr/net/coap.h>

CoAP packets may be of one of these types.

Enumerator
COAP_TYPE_CON	Confirmable message. The packet is a request or response the destination end-point must acknowledge.
COAP_TYPE_NON_CON	Non-confirmable message. The packet is a request or response that doesn't require acknowledgements.
COAP_TYPE_ACK	Acknowledge. Response to a confirmable message.
COAP_TYPE_RESET	Reset. Rejecting a packet for any reason is done by sending a message of this type.

◆ coap_option_num

enum coap_option_num

#include <zephyr/net/coap.h>

Set of CoAP packet options we are aware of.

Users may add options other than these to their packets, provided they know how to format them correctly. The only restriction is that all options must be added to a packet in numeric order.

Refer to RFC 7252, section 12.2 for more information.

Enumerator
COAP_OPTION_IF_MATCH	If-Match.
COAP_OPTION_URI_HOST	Uri-Host.
COAP_OPTION_ETAG	ETag.
COAP_OPTION_IF_NONE_MATCH	If-None-Match.
COAP_OPTION_OBSERVE	Observe (RFC 7641)
COAP_OPTION_URI_PORT	Uri-Port.
COAP_OPTION_LOCATION_PATH	Location-Path.
COAP_OPTION_URI_PATH	Uri-Path.
COAP_OPTION_CONTENT_FORMAT	Content-Format.
COAP_OPTION_MAX_AGE	Max-Age.
COAP_OPTION_URI_QUERY	Uri-Query.
COAP_OPTION_ACCEPT	Accept.
COAP_OPTION_LOCATION_QUERY	Location-Query.
COAP_OPTION_BLOCK2	Block2 (RFC 7959)
COAP_OPTION_BLOCK1	Block1 (RFC 7959)
COAP_OPTION_SIZE2	Size2 (RFC 7959)
COAP_OPTION_PROXY_URI	Proxy-Uri.
COAP_OPTION_PROXY_SCHEME	Proxy-Scheme.
COAP_OPTION_SIZE1	Size1.
COAP_OPTION_ECHO	Echo (RFC 9175)
COAP_OPTION_REQUEST_TAG	Request-Tag (RFC 9175)

◆ coap_response_code

enum coap_response_code

#include <zephyr/net/coap.h>

Set of response codes available for a response packet.

To be used when creating a response.

Enumerator
COAP_RESPONSE_CODE_OK	2.00 - OK
COAP_RESPONSE_CODE_CREATED	2.01 - Created
COAP_RESPONSE_CODE_DELETED	2.02 - Deleted
COAP_RESPONSE_CODE_VALID	2.03 - Valid
COAP_RESPONSE_CODE_CHANGED	2.04 - Changed
COAP_RESPONSE_CODE_CONTENT	2.05 - Content
COAP_RESPONSE_CODE_CONTINUE	2.31 - Continue
COAP_RESPONSE_CODE_BAD_REQUEST	4.00 - Bad Request
COAP_RESPONSE_CODE_UNAUTHORIZED	4.01 - Unauthorized
COAP_RESPONSE_CODE_BAD_OPTION	4.02 - Bad Option
COAP_RESPONSE_CODE_FORBIDDEN	4.03 - Forbidden
COAP_RESPONSE_CODE_NOT_FOUND	4.04 - Not Found
COAP_RESPONSE_CODE_NOT_ALLOWED	4.05 - Method Not Allowed
COAP_RESPONSE_CODE_NOT_ACCEPTABLE	4.06 - Not Acceptable
COAP_RESPONSE_CODE_INCOMPLETE	4.08 - Request Entity Incomplete
COAP_RESPONSE_CODE_CONFLICT	4.12 - Precondition Failed
COAP_RESPONSE_CODE_PRECONDITION_FAILED	4.12 - Precondition Failed
COAP_RESPONSE_CODE_REQUEST_TOO_LARGE	4.13 - Request Entity Too Large
COAP_RESPONSE_CODE_UNSUPPORTED_CONTENT_FORMAT	4.15 - Unsupported Content-Format
COAP_RESPONSE_CODE_UNPROCESSABLE_ENTITY	4.22 - Unprocessable Entity
COAP_RESPONSE_CODE_TOO_MANY_REQUESTS	4.29 - Too Many Requests
COAP_RESPONSE_CODE_INTERNAL_ERROR	5.00 - Internal Server Error
COAP_RESPONSE_CODE_NOT_IMPLEMENTED	5.01 - Not Implemented
COAP_RESPONSE_CODE_BAD_GATEWAY	5.02 - Bad Gateway
COAP_RESPONSE_CODE_SERVICE_UNAVAILABLE	5.03 - Service Unavailable
COAP_RESPONSE_CODE_GATEWAY_TIMEOUT	5.04 - Gateway Timeout
COAP_RESPONSE_CODE_PROXYING_NOT_SUPPORTED	5.05 - Proxying Not Supported

Function Documentation

◆ coap_ack_init()

int coap_ack_init	(	struct coap_packet *	cpkt,
		const struct coap_packet *	req,
		uint8_t *	data,
		uint16_t	max_len,
		uint8_t	code
	)

#include <zephyr/net/coap.h>

Create a new CoAP Acknowledgment message for given request.

This function works like coap_packet_init, filling CoAP header type, CoAP header token, and CoAP header message id fields according to acknowledgment rules.

Parameters

cpkt	New packet to be initialized using the storage from data.
req	CoAP request packet that is being acknowledged
data	Data that will contain a CoAP packet information
max_len	Maximum allowable length of data
code	CoAP header code

Returns: 0 in case of success or negative in case of error.

◆ coap_append_block1_option()

int coap_append_block1_option	(	struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Append BLOCK1 option to the packet.

Parameters

cpkt	Packet to be updated
ctx	Block context from which to retrieve the information for the Block1 option

Returns: 0 in case of success or negative in case of error.

◆ coap_append_block2_option()

int coap_append_block2_option	(	struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Append BLOCK2 option to the packet.

Parameters

cpkt	Packet to be updated
ctx	Block context from which to retrieve the information for the Block2 option

Returns: 0 in case of success or negative in case of error.

◆ coap_append_descriptive_block_option()

int coap_append_descriptive_block_option	(	struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Append BLOCK1 or BLOCK2 option to the packet.

If the CoAP packet is a request then BLOCK1 is appended otherwise BLOCK2 is appended.

Parameters

cpkt	Packet to be updated
ctx	Block context from which to retrieve the information for the block option

Returns: 0 in case of success or negative in case of error.

◆ coap_append_option_int()

int coap_append_option_int	(	struct coap_packet *	cpkt,
		uint16_t	code,
		unsigned int	val
	)

#include <zephyr/net/coap.h>

Appends an integer value option to the packet.

The option must be added in numeric order of their codes, and the least amount of bytes will be used to encode the value.

Parameters

cpkt	Packet to be updated
code	Option code to add to the packet, see coap_option_num
val	Integer value to be added

Returns: 0 in case of success or negative in case of error.

◆ coap_append_size1_option()

int coap_append_size1_option	(	struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Append SIZE1 option to the packet.

Parameters

cpkt	Packet to be updated
ctx	Block context from which to retrieve the information for the Size1 option

Returns: 0 in case of success or negative in case of error.

◆ coap_append_size2_option()

int coap_append_size2_option	(	struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Append SIZE2 option to the packet.

Parameters

cpkt	Packet to be updated
ctx	Block context from which to retrieve the information for the Size2 option

Returns: 0 in case of success or negative in case of error.

◆ coap_block_has_more()

bool coap_block_has_more ( struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Check if BLOCK1 or BLOCK2 option has more flag set.

Parameters

cpkt	Packet to be checked.

Returns: true If more flag is set in BLOCK1 or BLOCK2; false If MORE flag is not set or BLOCK header not found.

◆ coap_block_size_to_bytes()

static uint16_t coap_block_size_to_bytes ( enum coap_block_size block_size )

inlinestatic

#include <zephyr/net/coap.h>

Helper for converting the enumeration to the size expressed in bytes.

Parameters

block_size The block size to be converted

Returns: The size in bytes that the block_size represents

◆ coap_block_transfer_init()

int coap_block_transfer_init	(	struct coap_block_context *	ctx,
		enum coap_block_size	block_size,
		size_t	total_size
	)

#include <zephyr/net/coap.h>

Initializes the context of a block-wise transfer.

Parameters

ctx	The context to be initialized
block_size	The size of the block
total_size	The total size of the transfer, if known

Returns: 0 in case of success or negative in case of error.

◆ coap_bytes_to_block_size()

static enum coap_block_size coap_bytes_to_block_size ( uint16_t bytes )

inlinestatic

#include <zephyr/net/coap.h>

Helper for converting block size in bytes to enumeration.

NOTE: Only valid CoAP block sizes map correctly.

Parameters

bytes CoAP block size in bytes.

Returns: enum coap_block_size

◆ coap_find_observer()

struct coap_observer * coap_find_observer	(	struct coap_observer *	observers,
		size_t	len,
		const struct sockaddr *	addr,
		const uint8_t *	token,
		uint8_t	token_len
	)

#include <zephyr/net/coap.h>

Returns the observer that matches address addr and has token token.

Parameters

observers	Pointer to the array of observers
len	Size of the array of observers
addr	Address of the endpoint observing a resource
token	Pointer to the token
token_len	Length of valid bytes in the token

Returns: A pointer to a observer if a match is found, NULL otherwise.

◆ coap_find_observer_by_addr()

struct coap_observer * coap_find_observer_by_addr	(	struct coap_observer *	observers,
		size_t	len,
		const struct sockaddr *	addr
	)

#include <zephyr/net/coap.h>

Returns the observer that matches address addr.

Parameters

observers	Pointer to the array of observers
len	Size of the array of observers
addr	Address of the endpoint observing a resource

Note: The function coap_find_observer() should be preferred if both the observer's address and token are known.

Returns: A pointer to a observer if a match is found, NULL otherwise.

◆ coap_find_observer_by_token()

struct coap_observer * coap_find_observer_by_token	(	struct coap_observer *	observers,
		size_t	len,
		const uint8_t *	token,
		uint8_t	token_len
	)

#include <zephyr/net/coap.h>

Returns the observer that has token token.

Parameters

observers	Pointer to the array of observers
len	Size of the array of observers
token	Pointer to the token
token_len	Length of valid bytes in the token

Note: The function coap_find_observer() should be preferred if both the observer's address and token are known.

Returns: A pointer to a observer if a match is found, NULL otherwise.

◆ coap_find_options()

int coap_find_options	(	const struct coap_packet *	cpkt,
		uint16_t	code,
		struct coap_option *	options,
		uint16_t	veclen
	)

#include <zephyr/net/coap.h>

Return the values associated with the option of value code.

Parameters

cpkt	CoAP packet representation
code	Option number to look for
options	Array of coap_option where to store the value of the options found
veclen	Number of elements in the options array

Returns: The number of options found in packet matching code, negative on error.

◆ coap_get_block1_option()

int coap_get_block1_option	(	const struct coap_packet *	cpkt,
		bool *	has_more,
		uint8_t *	block_number
	)

#include <zephyr/net/coap.h>

Get the block size, more flag and block number from the CoAP block1 option.

Parameters

cpkt	Packet to be inspected
has_more	Is set to the value of the more flag
block_number	Is set to the number of the block

Returns: Integer value of the block size in case of success or negative in case of error.

◆ coap_get_block2_option()

int coap_get_block2_option	(	const struct coap_packet *	cpkt,
		uint8_t *	block_number
	)

#include <zephyr/net/coap.h>

Get values from CoAP block2 option.

Decode block number and block size from option. Ignore the has_more flag as it should always be zero on queries.

Parameters

cpkt	Packet to be inspected
block_number	Is set to the number of the block

Returns: Integer value of the block size in case of success or negative in case of error.

◆ coap_get_option_int()

int coap_get_option_int	(	const struct coap_packet *	cpkt,
		uint16_t	code
	)

#include <zephyr/net/coap.h>

Get the integer representation of a CoAP option.

Parameters

cpkt	Packet to be inspected
code	CoAP option code

Returns: Integer value >= 0 in case of success or negative in case of error.

◆ coap_get_transmission_parameters()

struct coap_transmission_parameters coap_get_transmission_parameters ( void )

#include <zephyr/net/coap.h>

Get currently active CoAP transmission parameters.

Returns: CoAP transmission parameters structure.

◆ coap_handle_request()

int coap_handle_request	(	struct coap_packet *	cpkt,
		struct coap_resource *	resources,
		struct coap_option *	options,
		uint8_t	opt_num,
		struct sockaddr *	addr,
		socklen_t	addr_len
	)

#include <zephyr/net/coap.h>

When a request is received, call the appropriate methods of the matching resources.

Parameters

cpkt	Packet received
resources	Array of known resources (terminated with empty resource)
options	Parsed options from coap_packet_parse()
opt_num	Number of options
addr	Peer address
addr_len	Peer address length

Return values

>=	0 in case of success.
-ENOTSUP	in case of invalid request code.
-EPERM	in case resource handler is not implemented.
-ENOENT	in case the resource is not found.

◆ coap_handle_request_len()

int coap_handle_request_len	(	struct coap_packet *	cpkt,
		struct coap_resource *	resources,
		size_t	resources_len,
		struct coap_option *	options,
		uint8_t	opt_num,
		struct sockaddr *	addr,
		socklen_t	addr_len
	)

#include <zephyr/net/coap.h>

When a request is received, call the appropriate methods of the matching resources.

Parameters

cpkt	Packet received
resources	Array of known resources
resources_len	Number of resources in the array
options	Parsed options from coap_packet_parse()
opt_num	Number of options
addr	Peer address
addr_len	Peer address length

Return values

>=	0 in case of success.
-ENOTSUP	in case of invalid request code.
-EPERM	in case resource handler is not implemented.
-ENOENT	in case the resource is not found.

◆ coap_has_descriptive_block_option()

bool coap_has_descriptive_block_option ( struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Check if a descriptive block option is set in the packet.

If the CoAP packet is a request then an available BLOCK1 option would be checked otherwise a BLOCK2 option would be checked.

Parameters

cpkt	Packet to be checked.

Returns: true if the corresponding block option is set, false otherwise.

◆ coap_header_get_code()

uint8_t coap_header_get_code ( const struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Returns the code of the CoAP packet.

Parameters

cpkt	CoAP packet representation

Returns: the code present in the packet

◆ coap_header_get_id()

uint16_t coap_header_get_id ( const struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Returns the message id associated with the CoAP packet.

Parameters

cpkt	CoAP packet representation

Returns: the message id present in the packet

◆ coap_header_get_token()

uint8_t coap_header_get_token	(	const struct coap_packet *	cpkt,
		uint8_t *	token
	)

#include <zephyr/net/coap.h>

Returns the token (if any) in the CoAP packet.

Parameters

cpkt	CoAP packet representation
token	Where to store the token, must point to a buffer containing at least COAP_TOKEN_MAX_LEN bytes

Returns: Token length in the CoAP packet (0 - COAP_TOKEN_MAX_LEN).

◆ coap_header_get_type()

uint8_t coap_header_get_type ( const struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Returns the type of the CoAP packet.

Parameters

cpkt	CoAP packet representation

Returns: the type of the packet

◆ coap_header_get_version()

uint8_t coap_header_get_version ( const struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Returns the version present in a CoAP packet.

Parameters

cpkt	CoAP packet representation

Returns: the CoAP version in packet

◆ coap_header_set_code()

int coap_header_set_code	(	const struct coap_packet *	cpkt,
		uint8_t	code
	)

#include <zephyr/net/coap.h>

Modifies the code of the CoAP packet.

Parameters

cpkt	CoAP packet representation
code	CoAP code

Returns: 0 on success, -EINVAL on failure

◆ coap_next_block()

size_t coap_next_block	(	const struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Updates ctx so after this is called the current entry indicates the correct offset in the body of data being transferred.

Parameters

cpkt	Packet in which to look for block-wise transfers options
ctx	Block context to be updated

Returns: The offset in the block-wise transfer, 0 if the transfer has finished.

◆ coap_next_block_for_option()

int coap_next_block_for_option	(	const struct coap_packet *	cpkt,
		struct coap_block_context *	ctx,
		enum coap_option_num	option
	)

#include <zephyr/net/coap.h>

Updates ctx according to option set in cpkt so after this is called the current entry indicates the correct offset in the body of data being transferred.

Parameters

cpkt	Packet in which to look for block-wise transfers options
ctx	Block context to be updated
option	Either COAP_OPTION_BLOCK1 or COAP_OPTION_BLOCK2

Returns: The offset in the block-wise transfer, 0 if the transfer has finished or a negative value in case of an error.

◆ coap_next_id()

uint16_t coap_next_id ( void )

#include <zephyr/net/coap.h>

Helper to generate message ids.

Returns: a new message id

◆ coap_next_token()

uint8_t * coap_next_token ( void )

#include <zephyr/net/coap.h>

Returns a randomly generated array of 8 bytes, that can be used as a message's token.

Returns: a 8-byte pseudo-random token.

◆ coap_observer_init()

void coap_observer_init	(	struct coap_observer *	observer,
		const struct coap_packet *	request,
		const struct sockaddr *	addr
	)

#include <zephyr/net/coap.h>

Indicates that the remote device referenced by addr, with request, wants to observe a resource.

Parameters

observer	Observer to be initialized
request	Request on which the observer will be based
addr	Address of the remote device

◆ coap_observer_next_unused()

struct coap_observer * coap_observer_next_unused	(	struct coap_observer *	observers,
		size_t	len
	)

#include <zephyr/net/coap.h>

Returns the next available observer representation.

Parameters

observers	Pointer to the array of observers
len	Size of the array of observers

Returns: A pointer to a observer if there's an available observer, NULL otherwise.

◆ coap_option_value_to_int()

unsigned int coap_option_value_to_int ( const struct coap_option * option )

#include <zephyr/net/coap.h>

Converts an option to its integer representation.

Assumes that the number is encoded in the network byte order in the option.

Parameters

option Pointer to the option value, retrieved by coap_find_options()

Returns: The integer representation of the option

◆ coap_packet_append_option()

int coap_packet_append_option	(	struct coap_packet *	cpkt,
		uint16_t	code,
		const uint8_t *	value,
		uint16_t	len
	)

#include <zephyr/net/coap.h>

Appends an option to the packet.

Note: options can be added out of numeric order of their codes. But it's more efficient to add them in order.

Parameters

cpkt	Packet to be updated
code	Option code to add to the packet, see coap_option_num
value	Pointer to the value of the option, will be copied to the packet
len	Size of the data to be added

Returns: 0 in case of success or negative in case of error.

◆ coap_packet_append_payload()

int coap_packet_append_payload	(	struct coap_packet *	cpkt,
		const uint8_t *	payload,
		uint16_t	payload_len
	)

#include <zephyr/net/coap.h>

Append payload to CoAP packet.

Parameters

cpkt	Packet to append the payload
payload	CoAP packet payload
payload_len	CoAP packet payload len

Returns: 0 in case of success or negative in case of error.

◆ coap_packet_append_payload_marker()

int coap_packet_append_payload_marker ( struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Append payload marker to CoAP packet.

Parameters

cpkt	Packet to append the payload marker (0xFF)

Returns: 0 in case of success or negative in case of error.

◆ coap_packet_get_payload()

const uint8_t * coap_packet_get_payload	(	const struct coap_packet *	cpkt,
		uint16_t *	len
	)

#include <zephyr/net/coap.h>

Returns the data pointer and length of the CoAP packet.

Parameters

cpkt	CoAP packet representation
len	Total length of CoAP payload

Returns: data pointer and length if payload exists NULL pointer and length set to 0 in case there is no payload

◆ coap_packet_init()

int coap_packet_init	(	struct coap_packet *	cpkt,
		uint8_t *	data,
		uint16_t	max_len,
		uint8_t	ver,
		uint8_t	type,
		uint8_t	token_len,
		const uint8_t *	token,
		uint8_t	code,
		uint16_t	id
	)

#include <zephyr/net/coap.h>

Creates a new CoAP Packet from input data.

Parameters

cpkt	New packet to be initialized using the storage from data.
data	Data that will contain a CoAP packet information
max_len	Maximum allowable length of data
ver	CoAP header version
type	CoAP header type
token_len	CoAP header token length
token	CoAP header token
code	CoAP header code
id	CoAP header message id

Returns: 0 in case of success or negative in case of error.

◆ coap_packet_is_request()

bool coap_packet_is_request ( const struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Check if a CoAP packet is a CoAP request.

Parameters

cpkt	Packet to be checked.

Returns: true if the packet is a request, false otherwise.

◆ coap_packet_parse()

int coap_packet_parse	(	struct coap_packet *	cpkt,
		uint8_t *	data,
		uint16_t	len,
		struct coap_option *	options,
		uint8_t	opt_num
	)

#include <zephyr/net/coap.h>

Parses the CoAP packet in data, validating it and initializing cpkt.

data must remain valid while cpkt is used.

Parameters

cpkt	Packet to be initialized from received data.
data	Data containing a CoAP packet, its data pointer is positioned on the start of the CoAP packet.
len	Length of the data
options	Parse options and cache its details.
opt_num	Number of options

Return values

0	in case of success.
-EINVAL	in case of invalid input args.
-EBADMSG	in case of malformed coap packet header.
-EILSEQ	in case of malformed coap options.

◆ coap_packet_remove_option()

int coap_packet_remove_option	(	struct coap_packet *	cpkt,
		uint16_t	code
	)

#include <zephyr/net/coap.h>

Remove an option from the packet.

Parameters

cpkt	Packet to be updated
code	Option code to remove from the packet, see coap_option_num

Returns: 0 in case of success or negative in case of error.

◆ coap_packet_set_path()

int coap_packet_set_path	(	struct coap_packet *	cpkt,
		const char *	path
	)

#include <zephyr/net/coap.h>

Parses provided coap path (with/without query) or query and appends that as options to the cpkt.

Parameters

cpkt	Packet to append path and query options for.
path	Null-terminated string of coap path, query or both.

Return values

0	in case of success or negative in case of error.

◆ coap_pending_clear()

void coap_pending_clear ( struct coap_pending * pending )

#include <zephyr/net/coap.h>

Cancels the pending retransmission, so it again becomes available.

Parameters

pending Pending representation to be canceled

◆ coap_pending_cycle()

bool coap_pending_cycle ( struct coap_pending * pending )

#include <zephyr/net/coap.h>

After a request is sent, user may want to cycle the pending retransmission so the timeout is updated.

Parameters

pending Pending representation to have its timeout updated

Returns: false if this is the last retransmission.

◆ coap_pending_init()

int coap_pending_init	(	struct coap_pending *	pending,
		const struct coap_packet *	request,
		const struct sockaddr *	addr,
		const struct coap_transmission_parameters *	params
	)

#include <zephyr/net/coap.h>

Initialize a pending request with a request.

The request's fields are copied into the pending struct, so request doesn't have to live for as long as the pending struct lives, but "data" that needs to live for at least that long.

Parameters

pending	Structure representing the waiting for a confirmation message, initialized with data from request
request	Message waiting for confirmation
addr	Address to send the retransmission
params	Pointer to the CoAP transmission parameters struct, or NULL to use default values

Returns: 0 in case of success or negative in case of error.

◆ coap_pending_next_to_expire()

struct coap_pending * coap_pending_next_to_expire	(	struct coap_pending *	pendings,
		size_t	len
	)

#include <zephyr/net/coap.h>

Returns the next pending about to expire, pending->timeout informs how many ms to next expiration.

Parameters

pendings	Pointer to the array of coap_pending structures
len	Size of the array of coap_pending structures

Returns: The next coap_pending to expire, NULL if none is about to expire.

◆ coap_pending_next_unused()

struct coap_pending * coap_pending_next_unused	(	struct coap_pending *	pendings,
		size_t	len
	)

#include <zephyr/net/coap.h>

Returns the next available pending struct, that can be used to track the retransmission status of a request.

Parameters

pendings	Pointer to the array of coap_pending structures
len	Size of the array of coap_pending structures

Returns: pointer to a free coap_pending structure, NULL in case none could be found.

◆ coap_pending_received()

struct coap_pending * coap_pending_received	(	const struct coap_packet *	response,
		struct coap_pending *	pendings,
		size_t	len
	)

#include <zephyr/net/coap.h>

After a response is received, returns if there is any matching pending request exits.

User has to clear all pending retransmissions related to that response by calling coap_pending_clear().

Parameters

response	The received response
pendings	Pointer to the array of coap_reply structures
len	Size of the array of coap_reply structures

Returns: pointer to the associated coap_pending structure, NULL in case none could be found.

◆ coap_pendings_clear()

void coap_pendings_clear	(	struct coap_pending *	pendings,
		size_t	len
	)

#include <zephyr/net/coap.h>

Cancels all pending retransmissions, so they become available again.

Parameters

pendings	Pointer to the array of coap_pending structures
len	Size of the array of coap_pending structures

◆ coap_pendings_count()

size_t coap_pendings_count	(	struct coap_pending *	pendings,
		size_t	len
	)

#include <zephyr/net/coap.h>

Count number of pending requests.

Parameters

len	Number of elements in array.
pendings	Array of pending requests.

Returns: count of elements where timeout is not zero.

◆ coap_register_observer()

bool coap_register_observer	(	struct coap_resource *	resource,
		struct coap_observer *	observer
	)

#include <zephyr/net/coap.h>

After the observer is initialized, associate the observer with an resource.

Parameters

resource	Resource to add an observer
observer	Observer to be added

Returns: true if this is the first observer added to this resource.

◆ coap_remove_descriptive_block_option()

int coap_remove_descriptive_block_option ( struct coap_packet * cpkt )

#include <zephyr/net/coap.h>

Remove BLOCK1 or BLOCK2 option from the packet.

If the CoAP packet is a request then BLOCK1 is removed otherwise BLOCK2 is removed.

Parameters

cpkt	Packet to be updated.

Returns: 0 in case of success or negative in case of error.

◆ coap_remove_observer()

bool coap_remove_observer	(	struct coap_resource *	resource,
		struct coap_observer *	observer
	)

#include <zephyr/net/coap.h>

Remove this observer from the list of registered observers of that resource.

Parameters

resource	Resource in which to remove the observer
observer	Observer to be removed

Returns: true if the observer was found and removed.

◆ coap_replies_clear()

void coap_replies_clear	(	struct coap_reply *	replies,
		size_t	len
	)

#include <zephyr/net/coap.h>

Cancels all replies, so they become available again.

Parameters

replies	Pointer to the array of coap_reply structures
len	Size of the array of coap_reply structures

◆ coap_reply_clear()

void coap_reply_clear ( struct coap_reply * reply )

#include <zephyr/net/coap.h>

Cancels awaiting for this reply, so it becomes available again.

User responsibility to free the memory associated with data.

Parameters

reply The reply to be canceled

◆ coap_reply_init()

void coap_reply_init	(	struct coap_reply *	reply,
		const struct coap_packet *	request
	)

#include <zephyr/net/coap.h>

Indicates that a reply is expected for request.

Parameters

reply	Reply structure to be initialized
request	Request from which reply will be based

◆ coap_reply_next_unused()

struct coap_reply * coap_reply_next_unused	(	struct coap_reply *	replies,
		size_t	len
	)

#include <zephyr/net/coap.h>

Returns the next available reply struct, so it can be used to track replies and notifications received.

Parameters

replies	Pointer to the array of coap_reply structures
len	Size of the array of coap_reply structures

Returns: pointer to a free coap_reply structure, NULL in case none could be found.

◆ coap_request_is_observe()

bool coap_request_is_observe ( const struct coap_packet * request )

#include <zephyr/net/coap.h>

Returns if this request is enabling observing a resource.

Parameters

request Request to be checked

Returns: True if the request is enabling observing a resource, False otherwise

◆ coap_resource_notify()

int coap_resource_notify ( struct coap_resource * resource )

#include <zephyr/net/coap.h>

Indicates that this resource was updated and that the notify callback should be called for every registered observer.

Parameters

resource Resource that was updated

Returns: 0 in case of success or negative in case of error.

◆ coap_response_received()

struct coap_reply * coap_response_received	(	const struct coap_packet *	response,
		const struct sockaddr *	from,
		struct coap_reply *	replies,
		size_t	len
	)

#include <zephyr/net/coap.h>

After a response is received, call coap_reply_t handler registered in coap_reply structure.

Parameters

response	A response received
from	Address from which the response was received
replies	Pointer to the array of coap_reply structures
len	Size of the array of coap_reply structures

Returns: Pointer to the reply matching the packet received, NULL if none could be found.

◆ coap_set_transmission_parameters()

void coap_set_transmission_parameters ( const struct coap_transmission_parameters * params )

#include <zephyr/net/coap.h>

Set CoAP transmission parameters.

Parameters

params Pointer to the transmission parameters structure.

◆ coap_update_from_block()

int coap_update_from_block	(	const struct coap_packet *	cpkt,
		struct coap_block_context *	ctx
	)

#include <zephyr/net/coap.h>

Retrieves BLOCK{1,2} and SIZE{1,2} from cpkt and updates ctx accordingly.

Parameters

cpkt	Packet in which to look for block-wise transfers options
ctx	Block context to be updated

Returns: 0 in case of success or negative in case of error.

◆ coap_uri_path_match()

bool coap_uri_path_match	(	const char const	path,
		struct coap_option *	options,
		uint8_t	opt_num
	)

#include <zephyr/net/coap.h>

Verify if CoAP URI path matches with provided options.

Parameters

path	Null-terminated array of strings.
options	Parsed options from coap_packet_parse()
opt_num	Number of options

Returns: true if the CoAP URI path matches, false otherwise.

◆ coap_well_known_core_get()

int coap_well_known_core_get	(	struct coap_resource *	resource,
		const struct coap_packet *	request,
		struct coap_packet *	response,
		uint8_t *	data,
		uint16_t	data_len
	)

#include <zephyr/net/coap_link_format.h>

Build a CoAP response for a .well-known/core CoAP request.

Parameters

resource	Array of known resources, terminated with an empty resource
request	A pointer to the .well-known/core CoAP request
response	A pointer to a CoAP response, will be initialized
data	A data pointer to be used to build the CoAP response
data_len	The maximum length of the data buffer

Returns: 0 in case of success or negative in case of error.

◆ coap_well_known_core_get_len()

int coap_well_known_core_get_len	(	struct coap_resource *	resources,
		size_t	resources_len,
		const struct coap_packet *	request,
		struct coap_packet *	response,
		uint8_t *	data,
		uint16_t	data_len
	)

#include <zephyr/net/coap_link_format.h>

Build a CoAP response for a .well-known/core CoAP request.

Parameters

resources	Array of known resources
resources_len	Number of resources in the array
request	A pointer to the .well-known/core CoAP request
response	A pointer to a CoAP response, will be initialized
data	A data pointer to be used to build the CoAP response
data_len	The maximum length of the data buffer

Returns: 0 in case of success or negative in case of error.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

◆ COAP_MAKE_RESPONSE_CODE

◆ COAP_WELL_KNOWN_CORE_PATH

Typedef Documentation

◆ coap_method_t

◆ coap_notify_t

◆ coap_reply_t

Enumeration Type Documentation

◆ coap_block_size

◆ coap_content_format

◆ coap_method

◆ coap_msgtype

◆ coap_option_num

◆ coap_response_code

Function Documentation

◆ coap_ack_init()

◆ coap_append_block1_option()

◆ coap_append_block2_option()

◆ coap_append_descriptive_block_option()

◆ coap_append_option_int()

◆ coap_append_size1_option()

◆ coap_append_size2_option()

◆ coap_block_has_more()

◆ coap_block_size_to_bytes()

◆ coap_block_transfer_init()

◆ coap_bytes_to_block_size()

◆ coap_find_observer()

◆ coap_find_observer_by_addr()

◆ coap_find_observer_by_token()

◆ coap_find_options()

◆ coap_get_block1_option()

◆ coap_get_block2_option()

◆ coap_get_option_int()

◆ coap_get_transmission_parameters()

◆ coap_handle_request()

◆ coap_handle_request_len()

◆ coap_has_descriptive_block_option()

◆ coap_header_get_code()

◆ coap_header_get_id()

◆ coap_header_get_token()

◆ coap_header_get_type()

◆ coap_header_get_version()

◆ coap_header_set_code()

◆ coap_next_block()

◆ coap_next_block_for_option()

◆ coap_next_id()

◆ coap_next_token()

◆ coap_observer_init()

◆ coap_observer_next_unused()

◆ coap_option_value_to_int()

◆ coap_packet_append_option()

◆ coap_packet_append_payload()

◆ coap_packet_append_payload_marker()

◆ coap_packet_get_payload()

◆ coap_packet_init()

◆ coap_packet_is_request()

◆ coap_packet_parse()

◆ coap_packet_remove_option()

◆ coap_packet_set_path()

◆ coap_pending_clear()

◆ coap_pending_cycle()

◆ coap_pending_init()

◆ coap_pending_next_to_expire()

◆ coap_pending_next_unused()

◆ coap_pending_received()

◆ coap_pendings_clear()

◆ coap_pendings_count()

◆ coap_register_observer()

◆ coap_remove_descriptive_block_option()

◆ coap_remove_observer()

◆ coap_replies_clear()

◆ coap_reply_clear()

◆ coap_reply_init()

◆ coap_reply_next_unused()