CoAP#

This module includes functions that control CoAP communication.

The functions in this module are available when CoAP API feature (OPENTHREAD_CONFIG_COAP_API_ENABLE) is enabled.

Modules#

otCoapOption

otCoapOptionIterator

otCoapResource

otCoapBlockwiseResource

otCoapTxParameters

Enumerations#

enum

otCoapType {

OT_COAP_TYPE_CONFIRMABLE = 0

OT_COAP_TYPE_NON_CONFIRMABLE = 1

OT_COAP_TYPE_ACKNOWLEDGMENT = 2

OT_COAP_TYPE_RESET = 3

}

CoAP Type values (2 bit unsigned integer).

enum

otCoapCode {

OT_COAP_CODE_EMPTY = OT_COAP_CODE(0, 0)

OT_COAP_CODE_GET = OT_COAP_CODE(0, 1)

OT_COAP_CODE_POST = OT_COAP_CODE(0, 2)

OT_COAP_CODE_PUT = OT_COAP_CODE(0, 3)

OT_COAP_CODE_DELETE = OT_COAP_CODE(0, 4)

OT_COAP_CODE_RESPONSE_MIN = OT_COAP_CODE(2, 0)

OT_COAP_CODE_CREATED = OT_COAP_CODE(2, 1)

OT_COAP_CODE_DELETED = OT_COAP_CODE(2, 2)

OT_COAP_CODE_VALID = OT_COAP_CODE(2, 3)

OT_COAP_CODE_CHANGED = OT_COAP_CODE(2, 4)

OT_COAP_CODE_CONTENT = OT_COAP_CODE(2, 5)

OT_COAP_CODE_CONTINUE = OT_COAP_CODE(2, 31)

OT_COAP_CODE_BAD_REQUEST = OT_COAP_CODE(4, 0)

OT_COAP_CODE_UNAUTHORIZED = OT_COAP_CODE(4, 1)

OT_COAP_CODE_BAD_OPTION = OT_COAP_CODE(4, 2)

OT_COAP_CODE_FORBIDDEN = OT_COAP_CODE(4, 3)

OT_COAP_CODE_NOT_FOUND = OT_COAP_CODE(4, 4)

OT_COAP_CODE_METHOD_NOT_ALLOWED = OT_COAP_CODE(4, 5)

OT_COAP_CODE_NOT_ACCEPTABLE = OT_COAP_CODE(4, 6)

OT_COAP_CODE_REQUEST_INCOMPLETE = OT_COAP_CODE(4, 8)

OT_COAP_CODE_PRECONDITION_FAILED = OT_COAP_CODE(4, 12)

OT_COAP_CODE_REQUEST_TOO_LARGE = OT_COAP_CODE(4, 13)

OT_COAP_CODE_UNSUPPORTED_FORMAT = OT_COAP_CODE(4, 15)

OT_COAP_CODE_INTERNAL_ERROR = OT_COAP_CODE(5, 0)

OT_COAP_CODE_NOT_IMPLEMENTED = OT_COAP_CODE(5, 1)

OT_COAP_CODE_BAD_GATEWAY = OT_COAP_CODE(5, 2)

OT_COAP_CODE_SERVICE_UNAVAILABLE = OT_COAP_CODE(5, 3)

OT_COAP_CODE_GATEWAY_TIMEOUT = OT_COAP_CODE(5, 4)

OT_COAP_CODE_PROXY_NOT_SUPPORTED = OT_COAP_CODE(5, 5)

}

CoAP Code values.

enum

otCoapOptionType {

OT_COAP_OPTION_IF_MATCH = 1

OT_COAP_OPTION_URI_HOST = 3

OT_COAP_OPTION_E_TAG = 4

OT_COAP_OPTION_IF_NONE_MATCH = 5

OT_COAP_OPTION_OBSERVE = 6

OT_COAP_OPTION_URI_PORT = 7

OT_COAP_OPTION_LOCATION_PATH = 8

OT_COAP_OPTION_URI_PATH = 11

OT_COAP_OPTION_CONTENT_FORMAT = 12

OT_COAP_OPTION_MAX_AGE = 14

OT_COAP_OPTION_URI_QUERY = 15

OT_COAP_OPTION_ACCEPT = 17

OT_COAP_OPTION_LOCATION_QUERY = 20

OT_COAP_OPTION_BLOCK2 = 23

OT_COAP_OPTION_BLOCK1 = 27

OT_COAP_OPTION_SIZE2 = 28

OT_COAP_OPTION_PROXY_URI = 35

OT_COAP_OPTION_PROXY_SCHEME = 39

OT_COAP_OPTION_SIZE1 = 60

}

CoAP Option Numbers.

enum

otCoapOptionContentFormat {

OT_COAP_OPTION_CONTENT_FORMAT_TEXT_PLAIN = 0

OT_COAP_OPTION_CONTENT_FORMAT_COSE_ENCRYPT0 = 16

OT_COAP_OPTION_CONTENT_FORMAT_COSE_MAC0 = 17

OT_COAP_OPTION_CONTENT_FORMAT_COSE_SIGN1 = 18

OT_COAP_OPTION_CONTENT_FORMAT_LINK_FORMAT = 40

OT_COAP_OPTION_CONTENT_FORMAT_XML = 41

OT_COAP_OPTION_CONTENT_FORMAT_OCTET_STREAM = 42

OT_COAP_OPTION_CONTENT_FORMAT_EXI = 47

OT_COAP_OPTION_CONTENT_FORMAT_JSON = 50

OT_COAP_OPTION_CONTENT_FORMAT_JSON_PATCH_JSON = 51

OT_COAP_OPTION_CONTENT_FORMAT_MERGE_PATCH_JSON = 52

OT_COAP_OPTION_CONTENT_FORMAT_CBOR = 60

OT_COAP_OPTION_CONTENT_FORMAT_CWT = 61

OT_COAP_OPTION_CONTENT_FORMAT_COSE_ENCRYPT = 96

OT_COAP_OPTION_CONTENT_FORMAT_COSE_MAC = 97

OT_COAP_OPTION_CONTENT_FORMAT_COSE_SIGN = 98

OT_COAP_OPTION_CONTENT_FORMAT_COSE_KEY = 101

OT_COAP_OPTION_CONTENT_FORMAT_COSE_KEY_SET = 102

OT_COAP_OPTION_CONTENT_FORMAT_SENML_JSON = 110

OT_COAP_OPTION_CONTENT_FORMAT_SENSML_JSON = 111

OT_COAP_OPTION_CONTENT_FORMAT_SENML_CBOR = 112

OT_COAP_OPTION_CONTENT_FORMAT_SENSML_CBOR = 113

OT_COAP_OPTION_CONTENT_FORMAT_SENML_EXI = 114

OT_COAP_OPTION_CONTENT_FORMAT_SENSML_EXI = 115

OT_COAP_OPTION_CONTENT_FORMAT_COAP_GROUP_JSON = 256

OT_COAP_OPTION_CONTENT_FORMAT_SENML_XML = 310

OT_COAP_OPTION_CONTENT_FORMAT_SENSML_XML = 311

}

CoAP Content Format codes.

enum

otCoapBlockSzx {

OT_COAP_OPTION_BLOCK_SZX_16 = 0

OT_COAP_OPTION_BLOCK_SZX_32 = 1

OT_COAP_OPTION_BLOCK_SZX_64 = 2

OT_COAP_OPTION_BLOCK_SZX_128 = 3

OT_COAP_OPTION_BLOCK_SZX_256 = 4

OT_COAP_OPTION_BLOCK_SZX_512 = 5

OT_COAP_OPTION_BLOCK_SZX_1024 = 6

}

CoAP Block Size Exponents.

Typedefs#

typedef enum otCoapType

otCoapType

CoAP Type values (2 bit unsigned integer).

typedef enum otCoapCode

otCoapCode

CoAP Code values.

typedef enum otCoapOptionType

otCoapOptionType

CoAP Option Numbers.

typedef struct otCoapOption

otCoapOption

Represents a CoAP option.

typedef struct otCoapOptionIterator

otCoapOptionIterator

Acts as an iterator for CoAP options.

typedef enum otCoapOptionContentFormat

otCoapOptionContentFormat

CoAP Content Format codes.

typedef enum otCoapBlockSzx

otCoapBlockSzx

CoAP Block Size Exponents.

typedef void(*

otCoapResponseHandler)(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo, otError aResult)

Pointer is called when a CoAP response is received or on the request timeout.

typedef void(*

otCoapRequestHandler)(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo)

Pointer is called when a CoAP request with a given Uri-Path is received.

typedef otError(*

otCoapBlockwiseReceiveHook)(void *aContext, const uint8_t *aBlock, uint32_t aPosition, uint16_t aBlockLength, bool aMore, uint32_t aTotalLength)

Pointer is called when a CoAP message with an block-wise transfer option is received.

typedef otError(*

otCoapBlockwiseTransmitHook)(void *aContext, uint8_t *aBlock, uint32_t aPosition, uint16_t *aBlockLength, bool *aMore)

Pointer is called before the next block in a block-wise transfer is sent.

typedef struct otCoapResource

otCoapResource

Represents a CoAP resource.

typedef struct otCoapBlockwiseResource

otCoapBlockwiseResource

Represents a CoAP resource with block-wise transfer.

typedef struct otCoapTxParameters

otCoapTxParameters

Represents the CoAP transmission parameters.

Functions#

void

otCoapMessageInit(otMessage *aMessage, otCoapType aType, otCoapCode aCode)

Initializes the CoAP header.

otError

otCoapMessageInitResponse(otMessage *aResponse, const otMessage *aRequest, otCoapType aType, otCoapCode aCode)

Initializes a response message.

otError

otCoapMessageSetToken(otMessage *aMessage, const uint8_t *aToken, uint8_t aTokenLength)

Sets the Token value and length in a header.

void

otCoapMessageGenerateToken(otMessage *aMessage, uint8_t aTokenLength)

Sets the Token length and randomizes its value.

otError

otCoapMessageAppendContentFormatOption(otMessage *aMessage, otCoapOptionContentFormat aContentFormat)

Appends the Content Format CoAP option as specified in https://tools.ietf.org/html/rfc7252#page-92.

otError

otCoapMessageAppendOption(otMessage *aMessage, uint16_t aNumber, uint16_t aLength, const void *aValue)

Appends a CoAP option in a header.

otError

otCoapMessageAppendUintOption(otMessage *aMessage, uint16_t aNumber, uint32_t aValue)

Appends an unsigned integer CoAP option as specified in https://tools.ietf.org/html/rfc7252#section-3.2.

otError

otCoapMessageAppendObserveOption(otMessage *aMessage, uint32_t aObserve)

Appends an Observe option.

otError

otCoapMessageAppendUriPathOptions(otMessage *aMessage, const char *aUriPath)

Appends a Uri-Path option.

uint16_t

otCoapBlockSizeFromExponent(otCoapBlockSzx aSize)

Converts a CoAP Block option SZX field to the actual block size.

otError

otCoapMessageAppendBlock2Option(otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSzx aSize)

Appends a Block2 option.

otError

otCoapMessageAppendBlock1Option(otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSzx aSize)

Appends a Block1 option.

otError

otCoapMessageAppendProxyUriOption(otMessage *aMessage, const char *aUriPath)

Appends a Proxy-Uri option.

otError

otCoapMessageAppendMaxAgeOption(otMessage *aMessage, uint32_t aMaxAge)

Appends a Max-Age option.

otError

otCoapMessageAppendUriQueryOption(otMessage *aMessage, const char *aUriQuery)

Appends a single Uri-Query option.

otError

otCoapMessageSetPayloadMarker(otMessage *aMessage)

Adds Payload Marker indicating beginning of the payload to the CoAP header.

otCoapType

otCoapMessageGetType(const otMessage *aMessage)

Returns the Type value.

otCoapCode

otCoapMessageGetCode(const otMessage *aMessage)

Returns the Code value.

void

otCoapMessageSetCode(otMessage *aMessage, otCoapCode aCode)

Sets the Code value.

const char *

otCoapMessageCodeToString(const otMessage *aMessage)

Returns the CoAP Code as human readable string.

uint16_t

otCoapMessageGetMessageId(const otMessage *aMessage)

Returns the Message ID value.

uint8_t

otCoapMessageGetTokenLength(const otMessage *aMessage)

Returns the Token length.

const uint8_t *

otCoapMessageGetToken(const otMessage *aMessage)

Returns a pointer to the Token value.

otError

otCoapOptionIteratorInit(otCoapOptionIterator *aIterator, const otMessage *aMessage)

Initialises an iterator for the options in the given message.

const otCoapOption *

otCoapOptionIteratorGetFirstOptionMatching(otCoapOptionIterator *aIterator, uint16_t aOption)

Returns a pointer to the first option matching the specified option number.

const otCoapOption *

otCoapOptionIteratorGetFirstOption(otCoapOptionIterator *aIterator)

Returns a pointer to the first option.

const otCoapOption *

otCoapOptionIteratorGetNextOptionMatching(otCoapOptionIterator *aIterator, uint16_t aOption)

Returns a pointer to the next option matching the specified option number.

const otCoapOption *

otCoapOptionIteratorGetNextOption(otCoapOptionIterator *aIterator)

Returns a pointer to the next option.

otError

otCoapOptionIteratorGetOptionUintValue(otCoapOptionIterator *aIterator, uint64_t *aValue)

Fills current option value into aValue assuming the current value is an unsigned integer encoded according to https://tools.ietf.org/html/rfc7252#section-3.2.

otError

otCoapOptionIteratorGetOptionValue(otCoapOptionIterator *aIterator, void *aValue)

Fills current option value into aValue.

otMessage *

otCoapNewMessage(otInstance *aInstance, const otMessageSettings *aSettings)

Creates a new CoAP message.

otError

otCoapSendRequestWithParameters(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, const otCoapTxParameters *aTxParameters)

Sends a CoAP request with custom transmission parameters.

otError

otCoapSendRequestBlockWiseWithParameters(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, const otCoapTxParameters *aTxParameters, otCoapBlockwiseTransmitHook aTransmitHook, otCoapBlockwiseReceiveHook aReceiveHook)

Sends a CoAP request block-wise with custom transmission parameters.

otError

otCoapSendRequestBlockWise(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook, otCoapBlockwiseReceiveHook aReceiveHook)

Sends a CoAP request block-wise.

otError

otCoapSendRequest(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext)

Sends a CoAP request.

otError

otCoapStart(otInstance *aInstance, uint16_t aPort)

Starts the CoAP server.

otError

otCoapStop(otInstance *aInstance)

Stops the CoAP server.

void

otCoapAddResource(otInstance *aInstance, otCoapResource *aResource)

Adds a resource to the CoAP server.

void

otCoapRemoveResource(otInstance *aInstance, otCoapResource *aResource)

Removes a resource from the CoAP server.

void

otCoapAddBlockWiseResource(otInstance *aInstance, otCoapBlockwiseResource *aResource)

Adds a block-wise resource to the CoAP server.

void

otCoapRemoveBlockWiseResource(otInstance *aInstance, otCoapBlockwiseResource *aResource)

Removes a block-wise resource from the CoAP server.

void

otCoapSetDefaultHandler(otInstance *aInstance, otCoapRequestHandler aHandler, void *aContext)

Sets the default handler for unhandled CoAP requests.

otError

otCoapSendResponseWithParameters(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, const otCoapTxParameters *aTxParameters)

Sends a CoAP response from the server with custom transmission parameters.

otError

otCoapSendResponseBlockWiseWithParameters(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, const otCoapTxParameters *aTxParameters, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook)

Sends a CoAP response block-wise from the server with custom transmission parameters.

otError

otCoapSendResponseBlockWise(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook)

Sends a CoAP response block-wise from the server.

otError

otCoapSendResponse(otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo)

Sends a CoAP response from the server.

Macros#

#define

OT_DEFAULT_COAP_PORT 5683

Default CoAP port, as specified in RFC 7252.

#define

OT_COAP_DEFAULT_TOKEN_LENGTH 2

Default token length.

#define

OT_COAP_MAX_TOKEN_LENGTH 8

Max token length as specified (RFC 7252).

#define

OT_COAP_MAX_RETRANSMIT 20

Max retransmit supported by OpenThread.

#define

OT_COAP_MIN_ACK_TIMEOUT 1000

Minimal ACK timeout in milliseconds supported by OpenThread.

#define

OT_COAP_CODE (c, d)

Helper macro to define CoAP Code values.

Enumeration Documentation#

otCoapType#

otCoapType

CoAP Type values (2 bit unsigned integer).

Enumerator
OT_COAP_TYPE_CONFIRMABLE	Confirmable.
OT_COAP_TYPE_NON_CONFIRMABLE	Non-confirmable.
OT_COAP_TYPE_ACKNOWLEDGMENT	Acknowledgment.
OT_COAP_TYPE_RESET	Reset.

Definition at line 73 of file include/openthread/coap.h

otCoapCode#

otCoapCode

CoAP Code values.

Enumerator
OT_COAP_CODE_EMPTY	Empty message code.
OT_COAP_CODE_GET	Get.
OT_COAP_CODE_POST	Post.
OT_COAP_CODE_PUT	Put.
OT_COAP_CODE_DELETE	Delete.
OT_COAP_CODE_RESPONSE_MIN	2.00
OT_COAP_CODE_CREATED	Created.
OT_COAP_CODE_DELETED	Deleted.
OT_COAP_CODE_VALID	Valid.
OT_COAP_CODE_CHANGED	Changed.
OT_COAP_CODE_CONTENT	Content.
OT_COAP_CODE_CONTINUE	RFC7959 Continue.
OT_COAP_CODE_BAD_REQUEST	Bad Request.
OT_COAP_CODE_UNAUTHORIZED	Unauthorized.
OT_COAP_CODE_BAD_OPTION	Bad Option.
OT_COAP_CODE_FORBIDDEN	Forbidden.
OT_COAP_CODE_NOT_FOUND	Not Found.
OT_COAP_CODE_METHOD_NOT_ALLOWED	Method Not Allowed.
OT_COAP_CODE_NOT_ACCEPTABLE	Not Acceptable.
OT_COAP_CODE_REQUEST_INCOMPLETE	RFC7959 Request Entity Incomplete.
OT_COAP_CODE_PRECONDITION_FAILED	Precondition Failed.
OT_COAP_CODE_REQUEST_TOO_LARGE	Request Entity Too Large.
OT_COAP_CODE_UNSUPPORTED_FORMAT	Unsupported Content-Format.
OT_COAP_CODE_INTERNAL_ERROR	Internal Server Error.
OT_COAP_CODE_NOT_IMPLEMENTED	Not Implemented.
OT_COAP_CODE_BAD_GATEWAY	Bad Gateway.
OT_COAP_CODE_SERVICE_UNAVAILABLE	Service Unavailable.
OT_COAP_CODE_GATEWAY_TIMEOUT	Gateway Timeout.
OT_COAP_CODE_PROXY_NOT_SUPPORTED	Proxying Not Supported.

Definition at line 91 of file include/openthread/coap.h

otCoapOptionType#

otCoapOptionType

CoAP Option Numbers.

Enumerator
OT_COAP_OPTION_IF_MATCH	If-Match.
OT_COAP_OPTION_URI_HOST	Uri-Host.
OT_COAP_OPTION_E_TAG	ETag.
OT_COAP_OPTION_IF_NONE_MATCH	If-None-Match.
OT_COAP_OPTION_OBSERVE	Observe [RFC7641].
OT_COAP_OPTION_URI_PORT	Uri-Port.
OT_COAP_OPTION_LOCATION_PATH	Location-Path.
OT_COAP_OPTION_URI_PATH	Uri-Path.
OT_COAP_OPTION_CONTENT_FORMAT	Content-Format.
OT_COAP_OPTION_MAX_AGE	Max-Age.
OT_COAP_OPTION_URI_QUERY	Uri-Query.
OT_COAP_OPTION_ACCEPT	Accept.
OT_COAP_OPTION_LOCATION_QUERY	Location-Query.
OT_COAP_OPTION_BLOCK2	Block2 (RFC7959)
OT_COAP_OPTION_BLOCK1	Block1 (RFC7959)
OT_COAP_OPTION_SIZE2	Size2 (RFC7959)
OT_COAP_OPTION_PROXY_URI	Proxy-Uri.
OT_COAP_OPTION_PROXY_SCHEME	Proxy-Scheme.
OT_COAP_OPTION_SIZE1	Size1.

Definition at line 130 of file include/openthread/coap.h

otCoapOptionContentFormat#

otCoapOptionContentFormat

CoAP Content Format codes.

The full list is documented at https://www.iana.org/assignments/core-parameters/core-parameters.xhtml#content-formats

Enumerator
OT_COAP_OPTION_CONTENT_FORMAT_TEXT_PLAIN	text/plain; charset=utf-8: [RFC2046][RFC3676][RFC5147]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_ENCRYPT0	application/cose; cose-type="cose-encrypt0": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_MAC0	application/cose; cose-type="cose-mac0": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_SIGN1	application/cose; cose-type="cose-sign1": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_LINK_FORMAT	application/link-format: [RFC6690]
OT_COAP_OPTION_CONTENT_FORMAT_XML	application/xml: [RFC3023]
OT_COAP_OPTION_CONTENT_FORMAT_OCTET_STREAM	application/octet-stream: [RFC2045][RFC2046]
OT_COAP_OPTION_CONTENT_FORMAT_EXI	application/exi: ["Efficient XML Interchange (EXI) Format 1.0 (Second Edition)", February 2014]
OT_COAP_OPTION_CONTENT_FORMAT_JSON	application/json: [RFC7159]
OT_COAP_OPTION_CONTENT_FORMAT_JSON_PATCH_JSON	application/json-patch+json: [RFC6902]
OT_COAP_OPTION_CONTENT_FORMAT_MERGE_PATCH_JSON	application/merge-patch+json: [RFC7396]
OT_COAP_OPTION_CONTENT_FORMAT_CBOR	application/cbor: [RFC7049]
OT_COAP_OPTION_CONTENT_FORMAT_CWT	application/cwt: [RFC8392]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_ENCRYPT	application/cose; cose-type="cose-encrypt": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_MAC	application/cose; cose-type="cose-mac": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_SIGN	application/cose; cose-type="cose-sign": [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_KEY	application/cose-key: [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_COSE_KEY_SET	application/cose-key-set: [RFC8152]
OT_COAP_OPTION_CONTENT_FORMAT_SENML_JSON	application/senml+json: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENSML_JSON	application/sensml+json: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENML_CBOR	application/senml+cbor: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENSML_CBOR	application/sensml+cbor: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENML_EXI	application/senml-exi: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENSML_EXI	application/sensml-exi: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_COAP_GROUP_JSON	application/coap-group+json: [RFC7390]
OT_COAP_OPTION_CONTENT_FORMAT_SENML_XML	application/senml+xml: [RFC8428]
OT_COAP_OPTION_CONTENT_FORMAT_SENSML_XML	application/sensml+xml: [RFC8428]

Definition at line 178 of file include/openthread/coap.h

otCoapBlockSzx#

otCoapBlockSzx

CoAP Block Size Exponents.

Enumerator
OT_COAP_OPTION_BLOCK_SZX_16
OT_COAP_OPTION_BLOCK_SZX_32
OT_COAP_OPTION_BLOCK_SZX_64
OT_COAP_OPTION_BLOCK_SZX_128
OT_COAP_OPTION_BLOCK_SZX_256
OT_COAP_OPTION_BLOCK_SZX_512
OT_COAP_OPTION_BLOCK_SZX_1024

Definition at line 320 of file include/openthread/coap.h

Typedef Documentation#

otCoapType#

typedef enum otCoapType otCoapType

CoAP Type values (2 bit unsigned integer).

Definition at line 79 of file include/openthread/coap.h

otCoapCode#

typedef enum otCoapCode otCoapCode

CoAP Code values.

Definition at line 125 of file include/openthread/coap.h

otCoapOptionType#

typedef enum otCoapOptionType otCoapOptionType

CoAP Option Numbers.

Definition at line 151 of file include/openthread/coap.h

otCoapOption#

typedef struct otCoapOption otCoapOption

Represents a CoAP option.

Definition at line 161 of file include/openthread/coap.h

otCoapOptionIterator#

typedef struct otCoapOptionIterator otCoapOptionIterator

Acts as an iterator for CoAP options.

Definition at line 172 of file include/openthread/coap.h

otCoapOptionContentFormat#

typedef enum otCoapOptionContentFormat otCoapOptionContentFormat

CoAP Content Format codes.

The full list is documented at https://www.iana.org/assignments/core-parameters/core-parameters.xhtml#content-formats

Definition at line 315 of file include/openthread/coap.h

otCoapBlockSzx#

typedef enum otCoapBlockSzx otCoapBlockSzx

CoAP Block Size Exponents.

Definition at line 329 of file include/openthread/coap.h

otCoapResponseHandler#

typedef void(* otCoapResponseHandler) (void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo, otError aResult) )(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo, otError aResult)

Pointer is called when a CoAP response is received or on the request timeout.

Parameters

[in]	aContext	A pointer to application-specific context.
[in]	aMessage	A pointer to the message buffer containing the response. NULL if no response was received.
[in]	aMessageInfo	A pointer to the message info for `aMessage`. NULL if no response was received.
[in]	aResult	A result of the CoAP transaction.

Definition at line 344 of file include/openthread/coap.h

otCoapRequestHandler#

typedef void(* otCoapRequestHandler) (void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo) )(void *aContext, otMessage *aMessage, const otMessageInfo *aMessageInfo)

Pointer is called when a CoAP request with a given Uri-Path is received.

Parameters

[in]	aContext	A pointer to arbitrary context information.
[in]	aMessage	A pointer to the message.
[in]	aMessageInfo	A pointer to the message info for `aMessage`.

Definition at line 357 of file include/openthread/coap.h

otCoapBlockwiseReceiveHook#

typedef otError(* otCoapBlockwiseReceiveHook) (void *aContext, const uint8_t *aBlock, uint32_t aPosition, uint16_t aBlockLength, bool aMore, uint32_t aTotalLength) )(void *aContext, const uint8_t *aBlock, uint32_t aPosition, uint16_t aBlockLength, bool aMore, uint32_t aTotalLength)

Pointer is called when a CoAP message with an block-wise transfer option is received.

Parameters

[in]	aContext	A pointer to application-specific context.
[in]	aBlock	A pointer to the block segment.
[in]	aPosition	The position of `aBlock` in a sequence in bytes.
[in]	aBlockLength	The length of the block segment in bytes.
[in]	aMore	Flag if more block segments are following.
[in]	aTotalLength	The total length in bytes of the transferred information (indicated by a Size1 or Size2 option).

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

Definition at line 378 of file include/openthread/coap.h

otCoapBlockwiseTransmitHook#

typedef otError(* otCoapBlockwiseTransmitHook) (void *aContext, uint8_t *aBlock, uint32_t aPosition, uint16_t *aBlockLength, bool *aMore) )(void *aContext, uint8_t *aBlock, uint32_t aPosition, uint16_t *aBlockLength, bool *aMore)

Pointer is called before the next block in a block-wise transfer is sent.

Parameters

[in]	aContext	A pointer to application-specific context.
[inout]	aBlock	A pointer to where the block segment can be written to.
[in]	aPosition	The position in a sequence from which to obtain the block segment.
[inout]	aBlockLength	On entry, the maximum block segment length in bytes.
[out]	aMore	A pointer to the flag if more block segments will follow.

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

Warnings

By changing the value of aBlockLength, the block size of the whole exchange is renegotiated. It is recommended to do this after the first block has been received as later changes could cause problems with other CoAP implementations.

Definition at line 405 of file include/openthread/coap.h

otCoapResource#

typedef struct otCoapResource otCoapResource

Represents a CoAP resource.

Definition at line 421 of file include/openthread/coap.h

otCoapBlockwiseResource#

typedef struct otCoapBlockwiseResource otCoapBlockwiseResource

Represents a CoAP resource with block-wise transfer.

Definition at line 445 of file include/openthread/coap.h

otCoapTxParameters#

typedef struct otCoapTxParameters otCoapTxParameters

Represents the CoAP transmission parameters.

Note

mAckTimeout * ((2 ** (mMaxRetransmit + 1)) - 1) * (mAckRandomFactorNumerator / mAckRandomFactorDenominator) must not exceed what can be represented by a uint32_t (0xffffffff). This limitation allows OpenThread to avoid 64-bit arithmetic.

Definition at line 483 of file include/openthread/coap.h

Function Documentation#

otCoapMessageInit#

void otCoapMessageInit (otMessage *aMessage, otCoapType aType, otCoapCode aCode)

Initializes the CoAP header.

Parameters

[inout]	aMessage	A pointer to the CoAP message to initialize.
[in]	aType	CoAP message type.
[in]	aCode	CoAP message code.

Definition at line 493 of file include/openthread/coap.h

otCoapMessageInitResponse#

otError otCoapMessageInitResponse (otMessage *aResponse, const otMessage *aRequest, otCoapType aType, otCoapCode aCode)

Initializes a response message.

Parameters

[inout]	aResponse	A pointer to the CoAP response message.
[in]	aRequest	A pointer to the CoAP request message.
[in]	aType	CoAP message type.
[in]	aCode	CoAP message code.

Note

Both message ID and token are set according to aRequest.

Definition at line 509 of file include/openthread/coap.h

otCoapMessageSetToken#

otError otCoapMessageSetToken (otMessage *aMessage, const uint8_t *aToken, uint8_t aTokenLength)

Sets the Token value and length in a header.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aToken	A pointer to the Token value.
[in]	aTokenLength	The Length of `aToken`.

Definition at line 522 of file include/openthread/coap.h

otCoapMessageGenerateToken#

void otCoapMessageGenerateToken (otMessage *aMessage, uint8_t aTokenLength)

Sets the Token length and randomizes its value.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aTokenLength	The Length of a Token to set.

Definition at line 531 of file include/openthread/coap.h

otCoapMessageAppendContentFormatOption#

otError otCoapMessageAppendContentFormatOption (otMessage *aMessage, otCoapOptionContentFormat aContentFormat)

Appends the Content Format CoAP option as specified in https://tools.ietf.org/html/rfc7252#page-92.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aContentFormat	One of the content formats listed in otCoapOptionContentFormat above.

This must be called before setting otCoapMessageSetPayloadMarker if a payload is to be included in the message.

The function is a convenience wrapper around otCoapMessageAppendUintOption, and if the desired format type code isn't listed in otCoapOptionContentFormat, this base function should be used instead.

Definition at line 552 of file include/openthread/coap.h

otCoapMessageAppendOption#

otError otCoapMessageAppendOption (otMessage *aMessage, uint16_t aNumber, uint16_t aLength, const void *aValue)

Appends a CoAP option in a header.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aNumber	The CoAP Option number.
[in]	aLength	The CoAP Option length.
[in]	aValue	A pointer to the CoAP value.

Definition at line 567 of file include/openthread/coap.h

otCoapMessageAppendUintOption#

otError otCoapMessageAppendUintOption (otMessage *aMessage, uint16_t aNumber, uint32_t aValue)

Appends an unsigned integer CoAP option as specified in https://tools.ietf.org/html/rfc7252#section-3.2.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aNumber	The CoAP Option number.
[in]	aValue	The CoAP Option unsigned integer value.

See Also

otCoapMessageGetOptionUintValue

Definition at line 583 of file include/openthread/coap.h

otCoapMessageAppendObserveOption#

otError otCoapMessageAppendObserveOption (otMessage *aMessage, uint32_t aObserve)

Appends an Observe option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aObserve	Observe field value.

Definition at line 596 of file include/openthread/coap.h

otCoapMessageAppendUriPathOptions#

otError otCoapMessageAppendUriPathOptions (otMessage *aMessage, const char *aUriPath)

Appends a Uri-Path option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aUriPath	A pointer to a NULL-terminated string.

Definition at line 609 of file include/openthread/coap.h

otCoapBlockSizeFromExponent#

uint16_t otCoapBlockSizeFromExponent (otCoapBlockSzx aSize)

Converts a CoAP Block option SZX field to the actual block size.

Parameters

[in]

aSize

Block size exponent.

Returns

The actual size exponent value.

Definition at line 619 of file include/openthread/coap.h

otCoapMessageAppendBlock2Option#

otError otCoapMessageAppendBlock2Option (otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSzx aSize)

Appends a Block2 option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aNum	Current block number.
[in]	aMore	Boolean to indicate more blocks are to be sent.
[in]	aSize	Block Size Exponent.

Definition at line 634 of file include/openthread/coap.h

otCoapMessageAppendBlock1Option#

otError otCoapMessageAppendBlock1Option (otMessage *aMessage, uint32_t aNum, bool aMore, otCoapBlockSzx aSize)

Appends a Block1 option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aNum	Current block number.
[in]	aMore	Boolean to indicate more blocks are to be sent.
[in]	aSize	Block Size Exponent.

Definition at line 649 of file include/openthread/coap.h

otCoapMessageAppendProxyUriOption#

otError otCoapMessageAppendProxyUriOption (otMessage *aMessage, const char *aUriPath)

Appends a Proxy-Uri option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aUriPath	A pointer to a NULL-terminated string.

Definition at line 662 of file include/openthread/coap.h

otCoapMessageAppendMaxAgeOption#

otError otCoapMessageAppendMaxAgeOption (otMessage *aMessage, uint32_t aMaxAge)

Appends a Max-Age option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aMaxAge	The Max-Age value.

Definition at line 675 of file include/openthread/coap.h

otCoapMessageAppendUriQueryOption#

otError otCoapMessageAppendUriQueryOption (otMessage *aMessage, const char *aUriQuery)

Appends a single Uri-Query option.

Parameters

[inout]	aMessage	A pointer to the CoAP message.
[in]	aUriQuery	A pointer to NULL-terminated string, which should contain a single key=value pair.

Definition at line 687 of file include/openthread/coap.h

otCoapMessageSetPayloadMarker#

otError otCoapMessageSetPayloadMarker (otMessage *aMessage)

Adds Payload Marker indicating beginning of the payload to the CoAP header.

Parameters

[inout]

aMessage

A pointer to the CoAP message.

Definition at line 698 of file include/openthread/coap.h

otCoapMessageGetType#

otCoapType otCoapMessageGetType (const otMessage *aMessage)

Returns the Type value.

Parameters

[in]

aMessage

A pointer to the CoAP message.

Returns

The Type value.

Definition at line 708 of file include/openthread/coap.h

otCoapMessageGetCode#

otCoapCode otCoapMessageGetCode (const otMessage *aMessage)

Returns the Code value.

Parameters

[in]

aMessage

A pointer to the CoAP message.

Returns

The Code value.

Definition at line 718 of file include/openthread/coap.h

otCoapMessageSetCode#

void otCoapMessageSetCode (otMessage *aMessage, otCoapCode aCode)

Sets the Code value.

Parameters

[inout]	aMessage	A pointer to the CoAP message to initialize.
[in]	aCode	CoAP message code.

Definition at line 727 of file include/openthread/coap.h

otCoapMessageCodeToString#

const char * otCoapMessageCodeToString (const otMessage *aMessage)

Returns the CoAP Code as human readable string.

Parameters

[in]

aMessage

A pointer to the CoAP message.

@ returns The CoAP Code as string.

Definition at line 737 of file include/openthread/coap.h

otCoapMessageGetMessageId#

uint16_t otCoapMessageGetMessageId (const otMessage *aMessage)

Returns the Message ID value.

Parameters

[in]

aMessage

A pointer to the CoAP message.

Returns

The Message ID value.

Definition at line 747 of file include/openthread/coap.h

otCoapMessageGetTokenLength#

uint8_t otCoapMessageGetTokenLength (const otMessage *aMessage)

Returns the Token length.

Parameters

[in]

aMessage

A pointer to the CoAP message.

Returns

The Token length.

Definition at line 757 of file include/openthread/coap.h

otCoapMessageGetToken#

const uint8_t * otCoapMessageGetToken (const otMessage *aMessage)

Returns a pointer to the Token value.

Parameters

[in]

aMessage

A pointer to the CoAP message.

Returns

A pointer to the Token value.

Definition at line 767 of file include/openthread/coap.h

otCoapOptionIteratorInit#

otError otCoapOptionIteratorInit (otCoapOptionIterator *aIterator, const otMessage *aMessage)

Initialises an iterator for the options in the given message.

Parameters

[inout]	aIterator	A pointer to the CoAP message option iterator.
[in]	aMessage	A pointer to the CoAP message.

Definition at line 779 of file include/openthread/coap.h

otCoapOptionIteratorGetFirstOptionMatching#

const otCoapOption * otCoapOptionIteratorGetFirstOptionMatching (otCoapOptionIterator *aIterator, uint16_t aOption)

Returns a pointer to the first option matching the specified option number.

Parameters

[in]	aIterator	A pointer to the CoAP message option iterator.
[in]	aOption	The option number sought.

Returns

A pointer to the first matching option. If no matching option is present NULL pointer is returned.

Definition at line 790 of file include/openthread/coap.h

otCoapOptionIteratorGetFirstOption#

const otCoapOption * otCoapOptionIteratorGetFirstOption (otCoapOptionIterator *aIterator)

Returns a pointer to the first option.

Parameters

[inout]

aIterator

A pointer to the CoAP message option iterator.

Returns

A pointer to the first option. If no option is present NULL pointer is returned.

Definition at line 800 of file include/openthread/coap.h

otCoapOptionIteratorGetNextOptionMatching#

const otCoapOption * otCoapOptionIteratorGetNextOptionMatching (otCoapOptionIterator *aIterator, uint16_t aOption)

Returns a pointer to the next option matching the specified option number.

Parameters

[in]	aIterator	A pointer to the CoAP message option iterator.
[in]	aOption	The option number sought.

Returns

A pointer to the next matching option. If no further matching option is present NULL pointer is returned.

Definition at line 811 of file include/openthread/coap.h

otCoapOptionIteratorGetNextOption#

const otCoapOption * otCoapOptionIteratorGetNextOption (otCoapOptionIterator *aIterator)

Returns a pointer to the next option.

Parameters

[inout]

aIterator

A pointer to the CoAP message option iterator.

Returns

A pointer to the next option. If no more options are present NULL pointer is returned.

Definition at line 821 of file include/openthread/coap.h

otCoapOptionIteratorGetOptionUintValue#

otError otCoapOptionIteratorGetOptionUintValue (otCoapOptionIterator *aIterator, uint64_t *aValue)

Fills current option value into aValue assuming the current value is an unsigned integer encoded according to https://tools.ietf.org/html/rfc7252#section-3.2.

Parameters

[inout]	aIterator	A pointer to the CoAP message option iterator.
[out]	aValue	A pointer to an unsigned integer to receive the option value.

See Also

otCoapMessageAppendUintOption

Definition at line 836 of file include/openthread/coap.h

otCoapOptionIteratorGetOptionValue#

otError otCoapOptionIteratorGetOptionValue (otCoapOptionIterator *aIterator, void *aValue)

Fills current option value into aValue.

Parameters

[inout]	aIterator	A pointer to the CoAP message option iterator.
[out]	aValue	A pointer to a buffer to receive the option value.

Definition at line 848 of file include/openthread/coap.h

otCoapNewMessage#

otMessage * otCoapNewMessage (otInstance *aInstance, const otMessageSettings *aSettings)

Creates a new CoAP message.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aSettings	A pointer to the message settings or NULL to set default settings.

Note

If aSettings is 'NULL', the link layer security is enabled and the message priority is set to OT_MESSAGE_PRIORITY_NORMAL by default.

Returns

A pointer to the message buffer or NULL if no message buffers are available or parameters are invalid.

Definition at line 862 of file include/openthread/coap.h

otCoapSendRequestWithParameters#

otError otCoapSendRequestWithParameters (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, const otCoapTxParameters *aTxParameters)

Sends a CoAP request with custom transmission parameters.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the message to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aHandler	A function pointer that shall be called on response reception or timeout.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.
[in]	aTxParameters	A pointer to transmission parameters for this request. Use NULL for defaults. Otherwise, parameters given must meet the following conditions: mMaxRetransmit is no more than OT_COAP_MAX_RETRANSMIT. mAckRandomFactorNumerator / mAckRandomFactorDenominator must not be below 1.0. The calculated exchange life time must not overflow uint32_t.

If a response for a request is expected, respective function and context information should be provided. If no response is expected, these arguments should be NULL pointers.

Definition at line 886 of file include/openthread/coap.h

otCoapSendRequestBlockWiseWithParameters#

otError otCoapSendRequestBlockWiseWithParameters (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, const otCoapTxParameters *aTxParameters, otCoapBlockwiseTransmitHook aTransmitHook, otCoapBlockwiseReceiveHook aReceiveHook)

Sends a CoAP request block-wise with custom transmission parameters.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the message to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aHandler	A function pointer that shall be called on response reception or timeout.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.
[in]	aTxParameters	A pointer to transmission parameters for this request. Use NULL for defaults.
[in]	aTransmitHook	A pointer to a hook function for outgoing block-wise transfer.
[in]	aReceiveHook	A pointer to a hook function for incoming block-wise transfer.

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

If a response for a request is expected, respective function and context information should be provided. If the response is expected to be block-wise, a respective hook function should be provided. If no response is expected, these arguments should be NULL pointers.

Definition at line 917 of file include/openthread/coap.h

otCoapSendRequestBlockWise#

static otError otCoapSendRequestBlockWise (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook, otCoapBlockwiseReceiveHook aReceiveHook)

Sends a CoAP request block-wise.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the message to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aHandler	A function pointer that shall be called on response reception or timeout.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.
[in]	aTransmitHook	A pointer to a hook function for outgoing block-wise transfer.
[in]	aReceiveHook	A pointer to a hook function for incoming block-wise transfer.

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

Definition at line 948 of file include/openthread/coap.h

otCoapSendRequest#

static otError otCoapSendRequest (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, otCoapResponseHandler aHandler, void *aContext)

Sends a CoAP request.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the message to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aHandler	A function pointer that shall be called on response reception or timeout.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.

If a response for a request is expected, respective function and context information should be provided. If no response is expected, these arguments should be NULL pointers.

Definition at line 977 of file include/openthread/coap.h

otCoapStart#

otError otCoapStart (otInstance *aInstance, uint16_t aPort)

Starts the CoAP server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aPort	The local UDP port to bind to.

Definition at line 997 of file include/openthread/coap.h

otCoapStop#

otError otCoapStop (otInstance *aInstance)

Stops the CoAP server.

Parameters

[in]

aInstance

A pointer to an OpenThread instance.

Definition at line 1007 of file include/openthread/coap.h

otCoapAddResource#

void otCoapAddResource (otInstance *aInstance, otCoapResource *aResource)

Adds a resource to the CoAP server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aResource	A pointer to the resource.

Definition at line 1016 of file include/openthread/coap.h

otCoapRemoveResource#

void otCoapRemoveResource (otInstance *aInstance, otCoapResource *aResource)

Removes a resource from the CoAP server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aResource	A pointer to the resource.

Definition at line 1025 of file include/openthread/coap.h

otCoapAddBlockWiseResource#

void otCoapAddBlockWiseResource (otInstance *aInstance, otCoapBlockwiseResource *aResource)

Adds a block-wise resource to the CoAP server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aResource	A pointer to the resource.

Definition at line 1034 of file include/openthread/coap.h

otCoapRemoveBlockWiseResource#

void otCoapRemoveBlockWiseResource (otInstance *aInstance, otCoapBlockwiseResource *aResource)

Removes a block-wise resource from the CoAP server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aResource	A pointer to the resource.

Definition at line 1043 of file include/openthread/coap.h

otCoapSetDefaultHandler#

void otCoapSetDefaultHandler (otInstance *aInstance, otCoapRequestHandler aHandler, void *aContext)

Sets the default handler for unhandled CoAP requests.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aHandler	A function pointer that shall be called when an unhandled request arrives.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.

Definition at line 1053 of file include/openthread/coap.h

otCoapSendResponseWithParameters#

otError otCoapSendResponseWithParameters (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, const otCoapTxParameters *aTxParameters)

Sends a CoAP response from the server with custom transmission parameters.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the CoAP response to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aTxParameters	A pointer to transmission parameters for this response. Use NULL for defaults.

Definition at line 1068 of file include/openthread/coap.h

otCoapSendResponseBlockWiseWithParameters#

otError otCoapSendResponseBlockWiseWithParameters (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, const otCoapTxParameters *aTxParameters, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook)

Sends a CoAP response block-wise from the server with custom transmission parameters.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the CoAP response to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aTxParameters	A pointer to transmission parameters for this response. Use NULL for defaults.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.
[in]	aTransmitHook	A pointer to a hook function for outgoing block-wise transfer.

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

Definition at line 1091 of file include/openthread/coap.h

otCoapSendResponseBlockWise#

static otError otCoapSendResponseBlockWise (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo, void *aContext, otCoapBlockwiseTransmitHook aTransmitHook)

Sends a CoAP response block-wise from the server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the CoAP response to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.
[in]	aContext	A pointer to arbitrary context information. May be NULL if not used.
[in]	aTransmitHook	A pointer to a hook function for outgoing block-wise transfer.

Is available when OPENTHREAD_CONFIG_COAP_BLOCKWISE_TRANSFER_ENABLE configuration is enabled.

Definition at line 1114 of file include/openthread/coap.h

otCoapSendResponse#

static otError otCoapSendResponse (otInstance *aInstance, otMessage *aMessage, const otMessageInfo *aMessageInfo)

Sends a CoAP response from the server.

Parameters

[in]	aInstance	A pointer to an OpenThread instance.
[in]	aMessage	A pointer to the CoAP response to send.
[in]	aMessageInfo	A pointer to the message info associated with `aMessage`.

Definition at line 1135 of file include/openthread/coap.h

Macro Definition Documentation#

OT_DEFAULT_COAP_PORT#

#define OT_DEFAULT_COAP_PORT

Value:

Default CoAP port, as specified in RFC 7252.

Definition at line 59 of file include/openthread/coap.h

OT_COAP_DEFAULT_TOKEN_LENGTH#

#define OT_COAP_DEFAULT_TOKEN_LENGTH

Value:

Default token length.

Definition at line 61 of file include/openthread/coap.h

OT_COAP_MAX_TOKEN_LENGTH#

#define OT_COAP_MAX_TOKEN_LENGTH

Value:

Max token length as specified (RFC 7252).

Definition at line 63 of file include/openthread/coap.h

OT_COAP_MAX_RETRANSMIT#

#define OT_COAP_MAX_RETRANSMIT

Value:

Max retransmit supported by OpenThread.

Definition at line 65 of file include/openthread/coap.h

OT_COAP_MIN_ACK_TIMEOUT#

#define OT_COAP_MIN_ACK_TIMEOUT

Value:

Minimal ACK timeout in milliseconds supported by OpenThread.

Definition at line 67 of file include/openthread/coap.h

OT_COAP_CODE#

#define OT_COAP_CODE

Value:

(c, d)

Helper macro to define CoAP Code values.

Definition at line 85 of file include/openthread/coap.h