PDU

API for PDUs. More...

Collaboration diagram for PDU:

Data Structures
struct	coap_option

Macros
#define	COAP_DEFAULT_PORT   5683 /* CoAP default UDP/TCP port */
#define	COAPS_DEFAULT_PORT   5684 /* CoAP default UDP/TCP port for secure transmission */
#define	COAP_DEFAULT_MAX_AGE   60 /* default maximum object lifetime in seconds */
#define	COAP_DEFAULT_MTU   1152
#define	COAP_BERT_BASE   1152
#define	COAP_DEFAULT_HOP_LIMIT   16
#define	COAP_DEFAULT_SCHEME   "coap" /* the default scheme for CoAP URIs */
#define	COAP_DEFAULT_URI_WELLKNOWN   ".well-known/core"
	well-known resources URI
#define	COAP_TOKEN_DEFAULT_MAX   8
#define	COAP_TOKEN_EXT_MAX   4096
#define	COAP_OPTION_IF_MATCH   1 /* C__RE__, opaque, 0-8 B, RFC7252 */
#define	COAP_OPTION_URI_HOST   3 /* CU-___U, String, 1-255 B, RFC7252 */
#define	COAP_OPTION_ETAG   4 /* ___RE__, opaque, 1-8 B, RFC7252 */
#define	COAP_OPTION_IF_NONE_MATCH   5 /* C___E__, empty, 0 B, RFC7252 */
#define	COAP_OPTION_OBSERVE   6 /* _U-_E_U, empty/uint,0/0-3 B, RFC7641 */
#define	COAP_OPTION_URI_PORT   7 /* CU-___U, uint, 0-2 B, RFC7252 */
#define	COAP_OPTION_LOCATION_PATH   8 /* ___RE__, String, 0-255 B, RFC7252 */
#define	COAP_OPTION_OSCORE   9 /* C_____U, *, 0-255 B, RFC8613 */
#define	COAP_OPTION_URI_PATH   11 /* CU-RE__, String, 0-255 B, RFC7252 */
#define	COAP_OPTION_CONTENT_FORMAT   12 /* ____E__, uint, 0-2 B, RFC7252 */
#define	COAP_OPTION_CONTENT_TYPE   COAP_OPTION_CONTENT_FORMAT
#define	COAP_OPTION_MAXAGE   14 /* _U-_E_U, uint, 0-4 B, RFC7252 */
#define	COAP_OPTION_URI_QUERY   15 /* CU-RE__, String, 1-255 B, RFC7252 */
#define	COAP_OPTION_HOP_LIMIT   16 /* ______U, uint, 1 B, RFC8768 */
#define	COAP_OPTION_ACCEPT   17 /* C___E__, uint, 0-2 B, RFC7252 */
#define	COAP_OPTION_Q_BLOCK1   19 /* CU__E_U, uint, 0-3 B, RFC9177 */
#define	COAP_OPTION_LOCATION_QUERY   20 /* ___RE__, String, 0-255 B, RFC7252 */
#define	COAP_OPTION_BLOCK2   23 /* CU-_E_U, uint, 0-3 B, RFC7959 */
#define	COAP_OPTION_BLOCK1   27 /* CU-_E_U, uint, 0-3 B, RFC7959 */
#define	COAP_OPTION_SIZE2   28 /* __N_E_U, uint, 0-4 B, RFC7959 */
#define	COAP_OPTION_Q_BLOCK2   31 /* CU_RE_U, uint, 0-3 B, RFC9177 */
#define	COAP_OPTION_PROXY_URI   35 /* CU-___U, String, 1-1034 B, RFC7252 */
#define	COAP_OPTION_PROXY_SCHEME   39 /* CU-___U, String, 1-255 B, RFC7252 */
#define	COAP_OPTION_SIZE1   60 /* __N_E_U, uint, 0-4 B, RFC7252 */
#define	COAP_OPTION_ECHO   252 /* _N__E_U, opaque, 0-40 B, RFC9175 */
#define	COAP_OPTION_NORESPONSE   258 /* _U-_E_U, uint, 0-1 B, RFC7967 */
#define	COAP_OPTION_RTAG   292 /* ___RE_U, opaque, 0-8 B, RFC9175 */
#define	COAP_MAX_OPT   65534
	the highest option number we know
#define	COAP_RESPONSE_CODE(N)   (((N)/100 << 5) | (N)%100)
#define	COAP_RESPONSE_CLASS(C)   (((C) >> 5) & 0xFF)
#define	COAP_ERROR_PHRASE_LENGTH   32
	maximum length of error phrase
#define	COAP_SIGNALING_CODE(N)   (((N)/100 << 5) | (N)%100)
#define	COAP_SIGNALING_OPTION_MAX_MESSAGE_SIZE   2
#define	COAP_SIGNALING_OPTION_BLOCK_WISE_TRANSFER   4
#define	COAP_SIGNALING_OPTION_EXTENDED_TOKEN_LENGTH   6
#define	COAP_SIGNALING_OPTION_CUSTODY   2
#define	COAP_SIGNALING_OPTION_ALTERNATIVE_ADDRESS   2
#define	COAP_SIGNALING_OPTION_HOLD_OFF   4
#define	COAP_SIGNALING_OPTION_BAD_CSM_OPTION   2
#define	COAP_MEDIATYPE_TEXT_PLAIN   0 /* text/plain (UTF-8) */
#define	COAP_MEDIATYPE_APPLICATION_LINK_FORMAT   40 /* application/link-format */
#define	COAP_MEDIATYPE_APPLICATION_XML   41 /* application/xml */
#define	COAP_MEDIATYPE_APPLICATION_OCTET_STREAM   42 /* application/octet-stream */
#define	COAP_MEDIATYPE_APPLICATION_RDF_XML   43 /* application/rdf+xml */
#define	COAP_MEDIATYPE_APPLICATION_EXI   47 /* application/exi */
#define	COAP_MEDIATYPE_APPLICATION_JSON   50 /* application/json */
#define	COAP_MEDIATYPE_APPLICATION_CBOR   60 /* application/cbor */
#define	COAP_MEDIATYPE_APPLICATION_CWT   61 /* application/cwt, RFC 8392 */
#define	COAP_MEDIATYPE_APPLICATION_COAP_GROUP_JSON   256 /* application/coap-group+json */
#define	COAP_MEDIATYPE_APPLICATION_COSE_SIGN   98 /* application/cose; cose-type="cose-sign" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_SIGN1   18 /* application/cose; cose-type="cose-sign1" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT   96 /* application/cose; cose-type="cose-encrypt" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT0   16 /* application/cose; cose-type="cose-encrypt0" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_MAC   97 /* application/cose; cose-type="cose-mac" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_MAC0   17 /* application/cose; cose-type="cose-mac0" */
#define	COAP_MEDIATYPE_APPLICATION_COSE_KEY   101 /* application/cose-key */
#define	COAP_MEDIATYPE_APPLICATION_COSE_KEY_SET   102 /* application/cose-key-set */
#define	COAP_MEDIATYPE_APPLICATION_SENML_JSON   110 /* application/senml+json */
#define	COAP_MEDIATYPE_APPLICATION_SENSML_JSON   111 /* application/sensml+json */
#define	COAP_MEDIATYPE_APPLICATION_SENML_CBOR   112 /* application/senml+cbor */
#define	COAP_MEDIATYPE_APPLICATION_SENSML_CBOR   113 /* application/sensml+cbor */
#define	COAP_MEDIATYPE_APPLICATION_SENML_EXI   114 /* application/senml-exi */
#define	COAP_MEDIATYPE_APPLICATION_SENSML_EXI   115 /* application/sensml-exi */
#define	COAP_MEDIATYPE_APPLICATION_SENML_XML   310 /* application/senml+xml */
#define	COAP_MEDIATYPE_APPLICATION_SENSML_XML   311 /* application/sensml+xml */
#define	COAP_MEDIATYPE_APPLICATION_DOTS_CBOR   271 /* application/dots+cbor */
#define	COAP_MEDIATYPE_APPLICATION_ACE_CBOR   19 /* application/ace+cbor */
#define	COAP_MEDIATYPE_APPLICATION_MB_CBOR_SEQ   272 /* application/missing-blocks+cbor-seq */
#define	COAP_MEDIATYPE_APPLICATION_OSCORE   10001 /* application/oscore */
#define	COAP_INVALID_MID   -1
	Indicates an invalid message id.
#define	COAP_INVALID_TID   COAP_INVALID_MID
	Indicates an invalid message id.
#define	COAP_OPTION_KEY(option)   (option).key
#define	COAP_OPTION_LENGTH(option)   (option).length
#define	COAP_OPTION_DATA(option)   ((unsigned char *)&(option) + sizeof(coap_option))

Typedefs
typedef enum coap_pdu_type_t	coap_pdu_type_t
	CoAP PDU message type definitions.
typedef enum coap_request_t	coap_request_t
	CoAP PDU Request methods.
typedef enum coap_pdu_signaling_proto_t	coap_pdu_signaling_proto_t
typedef int	coap_mid_t
	coap_mid_t is used to store the CoAP Message ID of a CoAP PDU.
typedef enum coap_proto_t	coap_proto_t
	CoAP protocol types.
typedef enum coap_pdu_code_t	coap_pdu_code_t
	Set of codes available for a PDU.

Enumerations
enum	coap_pdu_type_t { COAP_MESSAGE_CON , COAP_MESSAGE_NON , COAP_MESSAGE_ACK , COAP_MESSAGE_RST }
	CoAP PDU message type definitions. More...
enum	coap_request_t {   COAP_REQUEST_GET = 1 , COAP_REQUEST_POST , COAP_REQUEST_PUT , COAP_REQUEST_DELETE ,   COAP_REQUEST_FETCH , COAP_REQUEST_PATCH , COAP_REQUEST_IPATCH }
	CoAP PDU Request methods. More...
enum	coap_pdu_signaling_proto_t {   COAP_SIGNALING_CSM = COAP_SIGNALING_CODE(701) , COAP_SIGNALING_PING = COAP_SIGNALING_CODE(702) , COAP_SIGNALING_PONG = COAP_SIGNALING_CODE(703) , COAP_SIGNALING_RELEASE = COAP_SIGNALING_CODE(704) ,   COAP_SIGNALING_ABORT = COAP_SIGNALING_CODE(705) }
enum	coap_proto_t {   COAP_PROTO_NONE = 0 , COAP_PROTO_UDP , COAP_PROTO_DTLS , COAP_PROTO_TCP ,   COAP_PROTO_TLS , COAP_PROTO_WS , COAP_PROTO_WSS , COAP_PROTO_LAST }
	CoAP protocol types. More...
enum	coap_pdu_code_t {   COAP_EMPTY_CODE = 0 , COAP_REQUEST_CODE_GET = COAP_REQUEST_GET , COAP_REQUEST_CODE_POST = COAP_REQUEST_POST , COAP_REQUEST_CODE_PUT = COAP_REQUEST_PUT ,   COAP_REQUEST_CODE_DELETE = COAP_REQUEST_DELETE , COAP_REQUEST_CODE_FETCH = COAP_REQUEST_FETCH , COAP_REQUEST_CODE_PATCH = COAP_REQUEST_PATCH , COAP_REQUEST_CODE_IPATCH = COAP_REQUEST_IPATCH ,   COAP_RESPONSE_CODE_CREATED = COAP_RESPONSE_CODE(201) , COAP_RESPONSE_CODE_DELETED = COAP_RESPONSE_CODE(202) , COAP_RESPONSE_CODE_VALID = COAP_RESPONSE_CODE(203) , COAP_RESPONSE_CODE_CHANGED = COAP_RESPONSE_CODE(204) ,   COAP_RESPONSE_CODE_CONTENT = COAP_RESPONSE_CODE(205) , COAP_RESPONSE_CODE_CONTINUE = COAP_RESPONSE_CODE(231) , COAP_RESPONSE_CODE_BAD_REQUEST = COAP_RESPONSE_CODE(400) , COAP_RESPONSE_CODE_UNAUTHORIZED = COAP_RESPONSE_CODE(401) ,   COAP_RESPONSE_CODE_BAD_OPTION = COAP_RESPONSE_CODE(402) , COAP_RESPONSE_CODE_FORBIDDEN = COAP_RESPONSE_CODE(403) , COAP_RESPONSE_CODE_NOT_FOUND = COAP_RESPONSE_CODE(404) , COAP_RESPONSE_CODE_NOT_ALLOWED = COAP_RESPONSE_CODE(405) ,   COAP_RESPONSE_CODE_NOT_ACCEPTABLE = COAP_RESPONSE_CODE(406) , COAP_RESPONSE_CODE_INCOMPLETE = COAP_RESPONSE_CODE(408) , COAP_RESPONSE_CODE_CONFLICT = COAP_RESPONSE_CODE(409) , COAP_RESPONSE_CODE_PRECONDITION_FAILED = COAP_RESPONSE_CODE(412) ,   COAP_RESPONSE_CODE_REQUEST_TOO_LARGE = COAP_RESPONSE_CODE(413) , COAP_RESPONSE_CODE_UNSUPPORTED_CONTENT_FORMAT = COAP_RESPONSE_CODE(415) , COAP_RESPONSE_CODE_UNPROCESSABLE = COAP_RESPONSE_CODE(422) , COAP_RESPONSE_CODE_TOO_MANY_REQUESTS = COAP_RESPONSE_CODE(429) ,   COAP_RESPONSE_CODE_INTERNAL_ERROR = COAP_RESPONSE_CODE(500) , COAP_RESPONSE_CODE_NOT_IMPLEMENTED = COAP_RESPONSE_CODE(501) , COAP_RESPONSE_CODE_BAD_GATEWAY = COAP_RESPONSE_CODE(502) , COAP_RESPONSE_CODE_SERVICE_UNAVAILABLE = COAP_RESPONSE_CODE(503) ,   COAP_RESPONSE_CODE_GATEWAY_TIMEOUT = COAP_RESPONSE_CODE(504) , COAP_RESPONSE_CODE_PROXYING_NOT_SUPPORTED = COAP_RESPONSE_CODE(505) , COAP_RESPONSE_CODE_HOP_LIMIT_REACHED = COAP_RESPONSE_CODE(508) , COAP_SIGNALING_CODE_CSM = COAP_SIGNALING_CSM ,   COAP_SIGNALING_CODE_PING = COAP_SIGNALING_PING , COAP_SIGNALING_CODE_PONG = COAP_SIGNALING_PONG , COAP_SIGNALING_CODE_RELEASE = COAP_SIGNALING_RELEASE , COAP_SIGNALING_CODE_ABORT = COAP_SIGNALING_ABORT }
	Set of codes available for a PDU. More...

Functions
const char *	coap_response_phrase (unsigned char code)
	Returns a human-readable response phrase for the specified CoAP response code.
coap_pdu_t *	coap_pdu_init (coap_pdu_type_t type, coap_pdu_code_t code, coap_mid_t mid, size_t size)
	Creates a new CoAP PDU with at least enough storage space for the given size maximum message size.
COAP_API coap_pdu_t *	coap_new_pdu (coap_pdu_type_t type, coap_pdu_code_t code, coap_session_t *session)
	Creates a new CoAP PDU.
void	coap_delete_pdu (coap_pdu_t *pdu)
	Dispose of an CoAP PDU and frees associated storage.
COAP_API coap_pdu_t *	coap_pdu_duplicate (const coap_pdu_t *old_pdu, coap_session_t *session, size_t token_length, const uint8_t *token, coap_opt_filter_t *drop_options)
	Duplicate an existing PDU.
int	coap_pdu_parse (coap_proto_t proto, const uint8_t *data, size_t length, coap_pdu_t *pdu)
	Parses data into the CoAP PDU structure given in result.
int	coap_add_token (coap_pdu_t *pdu, size_t len, const uint8_t *data)
	Adds token of length len to pdu.
size_t	coap_add_option (coap_pdu_t *pdu, coap_option_num_t number, size_t len, const uint8_t *data)
	Adds option of given number to pdu that is passed as first parameter.
int	coap_add_data (coap_pdu_t *pdu, size_t len, const uint8_t *data)
	Adds given data to the pdu that is passed as first parameter.
uint8_t *	coap_add_data_after (coap_pdu_t *pdu, size_t len)
	Adds given data to the pdu that is passed as first parameter but does not.
int	coap_get_data (const coap_pdu_t *pdu, size_t *len, const uint8_t **data)
	Retrieves the length and data pointer of specified PDU.
int	coap_get_data_large (const coap_pdu_t *pdu, size_t *len, const uint8_t **data, size_t *offset, size_t *total)
	Retrieves the data from a PDU, with support for large bodies of data that spans multiple PDUs.
coap_pdu_code_t	coap_pdu_get_code (const coap_pdu_t *pdu)
	Gets the PDU code associated with pdu.
void	coap_pdu_set_code (coap_pdu_t *pdu, coap_pdu_code_t code)
	Sets the PDU code in the pdu.
coap_pdu_type_t	coap_pdu_get_type (const coap_pdu_t *pdu)
	Gets the PDU type associated with pdu.
void	coap_pdu_set_type (coap_pdu_t *pdu, coap_pdu_type_t type)
	Sets the PDU type in the pdu.
coap_bin_const_t	coap_pdu_get_token (const coap_pdu_t *pdu)
	Gets the token associated with pdu.
coap_mid_t	coap_pdu_get_mid (const coap_pdu_t *pdu)
	Gets the message id associated with pdu.
void	coap_pdu_set_mid (coap_pdu_t *pdu, coap_mid_t mid)
	Sets the message id in the pdu.

Detailed Description

API for PDUs.

Macro Definition Documentation

COAP_BERT_BASE

#define COAP_BERT_BASE   1152

Definition at line 44 of file coap_pdu.h.

COAP_DEFAULT_HOP_LIMIT

#define COAP_DEFAULT_HOP_LIMIT   16

Definition at line 47 of file coap_pdu.h.

COAP_DEFAULT_MAX_AGE

#define COAP_DEFAULT_MAX_AGE   60 /* default maximum object lifetime in seconds */

Definition at line 39 of file coap_pdu.h.

COAP_DEFAULT_MTU

#define COAP_DEFAULT_MTU   1152

Definition at line 41 of file coap_pdu.h.

COAP_DEFAULT_PORT

#define COAP_DEFAULT_PORT   5683 /* CoAP default UDP/TCP port */

Definition at line 37 of file coap_pdu.h.

COAP_DEFAULT_SCHEME

#define COAP_DEFAULT_SCHEME   "coap" /* the default scheme for CoAP URIs */

Definition at line 50 of file coap_pdu.h.

COAP_DEFAULT_URI_WELLKNOWN

#define COAP_DEFAULT_URI_WELLKNOWN   ".well-known/core"

well-known resources URI

Definition at line 53 of file coap_pdu.h.

COAP_ERROR_PHRASE_LENGTH

#define COAP_ERROR_PHRASE_LENGTH   32

maximum length of error phrase

Definition at line 178 of file coap_pdu.h.

COAP_INVALID_MID

#define COAP_INVALID_MID   -1

Indicates an invalid message id.

Definition at line 266 of file coap_pdu.h.

COAP_INVALID_TID

#define COAP_INVALID_TID   COAP_INVALID_MID

Indicates an invalid message id.

Deprecated:

Use COAP_INVALID_MID instead.

Definition at line 272 of file coap_pdu.h.

COAP_MAX_OPT

#define COAP_MAX_OPT   65534

the highest option number we know

Definition at line 151 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_ACE_CBOR

#define COAP_MEDIATYPE_APPLICATION_ACE_CBOR   19 /* application/ace+cbor */

Definition at line 251 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_CBOR

#define COAP_MEDIATYPE_APPLICATION_CBOR   60 /* application/cbor */

Definition at line 220 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COAP_GROUP_JSON

#define COAP_MEDIATYPE_APPLICATION_COAP_GROUP_JSON   256 /* application/coap-group+json */

Definition at line 224 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT

#define COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT   96 /* application/cose; cose-type="cose-encrypt" */

Definition at line 229 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT0

#define COAP_MEDIATYPE_APPLICATION_COSE_ENCRYPT0   16 /* application/cose; cose-type="cose-encrypt0" */

Definition at line 230 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_KEY

#define COAP_MEDIATYPE_APPLICATION_COSE_KEY   101 /* application/cose-key */

Definition at line 234 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_KEY_SET

#define COAP_MEDIATYPE_APPLICATION_COSE_KEY_SET   102 /* application/cose-key-set */

Definition at line 235 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_MAC

#define COAP_MEDIATYPE_APPLICATION_COSE_MAC   97 /* application/cose; cose-type="cose-mac" */

Definition at line 231 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_MAC0

#define COAP_MEDIATYPE_APPLICATION_COSE_MAC0   17 /* application/cose; cose-type="cose-mac0" */

Definition at line 232 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_SIGN

#define COAP_MEDIATYPE_APPLICATION_COSE_SIGN   98 /* application/cose; cose-type="cose-sign" */

Definition at line 227 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_COSE_SIGN1

#define COAP_MEDIATYPE_APPLICATION_COSE_SIGN1   18 /* application/cose; cose-type="cose-sign1" */

Definition at line 228 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_CWT

#define COAP_MEDIATYPE_APPLICATION_CWT   61 /* application/cwt, RFC 8392 */

Definition at line 221 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_DOTS_CBOR

#define COAP_MEDIATYPE_APPLICATION_DOTS_CBOR   271 /* application/dots+cbor */

Definition at line 248 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_EXI

#define COAP_MEDIATYPE_APPLICATION_EXI   47 /* application/exi */

Definition at line 218 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_JSON

#define COAP_MEDIATYPE_APPLICATION_JSON   50 /* application/json */

Definition at line 219 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_LINK_FORMAT

#define COAP_MEDIATYPE_APPLICATION_LINK_FORMAT   40 /* application/link-format */

Definition at line 214 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_MB_CBOR_SEQ

#define COAP_MEDIATYPE_APPLICATION_MB_CBOR_SEQ   272 /* application/missing-blocks+cbor-seq */

Definition at line 254 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_OCTET_STREAM

#define COAP_MEDIATYPE_APPLICATION_OCTET_STREAM   42 /* application/octet-stream */

Definition at line 216 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_OSCORE

#define COAP_MEDIATYPE_APPLICATION_OSCORE   10001 /* application/oscore */

Definition at line 257 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_RDF_XML

#define COAP_MEDIATYPE_APPLICATION_RDF_XML   43 /* application/rdf+xml */

Definition at line 217 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENML_CBOR

#define COAP_MEDIATYPE_APPLICATION_SENML_CBOR   112 /* application/senml+cbor */

Definition at line 240 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENML_EXI

#define COAP_MEDIATYPE_APPLICATION_SENML_EXI   114 /* application/senml-exi */

Definition at line 242 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENML_JSON

#define COAP_MEDIATYPE_APPLICATION_SENML_JSON   110 /* application/senml+json */

Definition at line 238 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENML_XML

#define COAP_MEDIATYPE_APPLICATION_SENML_XML   310 /* application/senml+xml */

Definition at line 244 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENSML_CBOR

#define COAP_MEDIATYPE_APPLICATION_SENSML_CBOR   113 /* application/sensml+cbor */

Definition at line 241 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENSML_EXI

#define COAP_MEDIATYPE_APPLICATION_SENSML_EXI   115 /* application/sensml-exi */

Definition at line 243 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENSML_JSON

#define COAP_MEDIATYPE_APPLICATION_SENSML_JSON   111 /* application/sensml+json */

Definition at line 239 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_SENSML_XML

#define COAP_MEDIATYPE_APPLICATION_SENSML_XML   311 /* application/sensml+xml */

Definition at line 245 of file coap_pdu.h.

COAP_MEDIATYPE_APPLICATION_XML

#define COAP_MEDIATYPE_APPLICATION_XML   41 /* application/xml */

Definition at line 215 of file coap_pdu.h.

COAP_MEDIATYPE_TEXT_PLAIN

#define COAP_MEDIATYPE_TEXT_PLAIN   0 /* text/plain (UTF-8) */

Definition at line 213 of file coap_pdu.h.

COAP_OPTION_ACCEPT

#define COAP_OPTION_ACCEPT   17 /* C___E__, uint, 0-2 B, RFC7252 */

Definition at line 134 of file coap_pdu.h.

COAP_OPTION_BLOCK1

#define COAP_OPTION_BLOCK1   27 /* CU-_E_U, uint, 0-3 B, RFC7959 */

Definition at line 138 of file coap_pdu.h.

COAP_OPTION_BLOCK2

#define COAP_OPTION_BLOCK2   23 /* CU-_E_U, uint, 0-3 B, RFC7959 */

Definition at line 137 of file coap_pdu.h.

COAP_OPTION_CONTENT_FORMAT

#define COAP_OPTION_CONTENT_FORMAT   12 /* ____E__, uint, 0-2 B, RFC7252 */

Definition at line 128 of file coap_pdu.h.

COAP_OPTION_CONTENT_TYPE

#define COAP_OPTION_CONTENT_TYPE   COAP_OPTION_CONTENT_FORMAT

Definition at line 129 of file coap_pdu.h.

COAP_OPTION_DATA

#define COAP_OPTION_DATA

(

option

)

((unsigned char *)&(option) + sizeof(coap_option))

Definition at line 288 of file coap_pdu.h.

COAP_OPTION_ECHO

#define COAP_OPTION_ECHO   252 /* _N__E_U, opaque, 0-40 B, RFC9175 */

Definition at line 144 of file coap_pdu.h.

COAP_OPTION_ETAG

#define COAP_OPTION_ETAG   4 /* ___RE__, opaque, 1-8 B, RFC7252 */

Definition at line 121 of file coap_pdu.h.

COAP_OPTION_HOP_LIMIT

#define COAP_OPTION_HOP_LIMIT   16 /* ______U, uint, 1 B, RFC8768 */

Definition at line 133 of file coap_pdu.h.

COAP_OPTION_IF_MATCH

#define COAP_OPTION_IF_MATCH   1 /* C__RE__, opaque, 0-8 B, RFC7252 */

Definition at line 119 of file coap_pdu.h.

COAP_OPTION_IF_NONE_MATCH

#define COAP_OPTION_IF_NONE_MATCH   5 /* C___E__, empty, 0 B, RFC7252 */

Definition at line 122 of file coap_pdu.h.

COAP_OPTION_KEY

#define COAP_OPTION_KEY

(

option

)

(option).key

Definition at line 286 of file coap_pdu.h.

COAP_OPTION_LENGTH

#define COAP_OPTION_LENGTH

(

option

)

(option).length

Definition at line 287 of file coap_pdu.h.

COAP_OPTION_LOCATION_PATH

#define COAP_OPTION_LOCATION_PATH   8 /* ___RE__, String, 0-255 B, RFC7252 */

Definition at line 125 of file coap_pdu.h.

COAP_OPTION_LOCATION_QUERY

#define COAP_OPTION_LOCATION_QUERY   20 /* ___RE__, String, 0-255 B, RFC7252 */

Definition at line 136 of file coap_pdu.h.

COAP_OPTION_MAXAGE

#define COAP_OPTION_MAXAGE   14 /* _U-_E_U, uint, 0-4 B, RFC7252 */

Definition at line 131 of file coap_pdu.h.

COAP_OPTION_NORESPONSE

#define COAP_OPTION_NORESPONSE   258 /* _U-_E_U, uint, 0-1 B, RFC7967 */

Definition at line 145 of file coap_pdu.h.

COAP_OPTION_OBSERVE

#define COAP_OPTION_OBSERVE   6 /* _U-_E_U, empty/uint,0/0-3 B, RFC7641 */

Definition at line 123 of file coap_pdu.h.

COAP_OPTION_OSCORE

#define COAP_OPTION_OSCORE   9 /* C_____U, *, 0-255 B, RFC8613 */

Definition at line 126 of file coap_pdu.h.

COAP_OPTION_PROXY_SCHEME

#define COAP_OPTION_PROXY_SCHEME   39 /* CU-___U, String, 1-255 B, RFC7252 */

Definition at line 142 of file coap_pdu.h.

COAP_OPTION_PROXY_URI

#define COAP_OPTION_PROXY_URI   35 /* CU-___U, String, 1-1034 B, RFC7252 */

Definition at line 141 of file coap_pdu.h.

COAP_OPTION_Q_BLOCK1

#define COAP_OPTION_Q_BLOCK1   19 /* CU__E_U, uint, 0-3 B, RFC9177 */

Definition at line 135 of file coap_pdu.h.

COAP_OPTION_Q_BLOCK2

#define COAP_OPTION_Q_BLOCK2   31 /* CU_RE_U, uint, 0-3 B, RFC9177 */

Definition at line 140 of file coap_pdu.h.

COAP_OPTION_RTAG

#define COAP_OPTION_RTAG   292 /* ___RE_U, opaque, 0-8 B, RFC9175 */

Definition at line 146 of file coap_pdu.h.

COAP_OPTION_SIZE1

#define COAP_OPTION_SIZE1   60 /* __N_E_U, uint, 0-4 B, RFC7252 */

Definition at line 143 of file coap_pdu.h.

COAP_OPTION_SIZE2

#define COAP_OPTION_SIZE2   28 /* __N_E_U, uint, 0-4 B, RFC7959 */

Definition at line 139 of file coap_pdu.h.

COAP_OPTION_URI_HOST

#define COAP_OPTION_URI_HOST   3 /* CU-___U, String, 1-255 B, RFC7252 */

Definition at line 120 of file coap_pdu.h.

COAP_OPTION_URI_PATH

#define COAP_OPTION_URI_PATH   11 /* CU-RE__, String, 0-255 B, RFC7252 */

Definition at line 127 of file coap_pdu.h.

COAP_OPTION_URI_PORT

#define COAP_OPTION_URI_PORT   7 /* CU-___U, uint, 0-2 B, RFC7252 */

Definition at line 124 of file coap_pdu.h.

COAP_OPTION_URI_QUERY

#define COAP_OPTION_URI_QUERY   15 /* CU-RE__, String, 1-255 B, RFC7252 */

Definition at line 132 of file coap_pdu.h.

COAP_RESPONSE_CLASS

#define COAP_RESPONSE_CLASS

(

C

)

(((C) >> 5) & 0xFF)

Definition at line 163 of file coap_pdu.h.

COAP_RESPONSE_CODE

#define COAP_RESPONSE_CODE

(

N

)

(((N)/100 << 5) | (N)%100)

Definition at line 160 of file coap_pdu.h.

COAP_SIGNALING_CODE

#define COAP_SIGNALING_CODE

(

N

)

(((N)/100 << 5) | (N)%100)

Definition at line 186 of file coap_pdu.h.

COAP_SIGNALING_OPTION_ALTERNATIVE_ADDRESS

#define COAP_SIGNALING_OPTION_ALTERNATIVE_ADDRESS   2

Definition at line 205 of file coap_pdu.h.

COAP_SIGNALING_OPTION_BAD_CSM_OPTION

#define COAP_SIGNALING_OPTION_BAD_CSM_OPTION   2

Definition at line 209 of file coap_pdu.h.

COAP_SIGNALING_OPTION_BLOCK_WISE_TRANSFER

#define COAP_SIGNALING_OPTION_BLOCK_WISE_TRANSFER   4

Definition at line 198 of file coap_pdu.h.

COAP_SIGNALING_OPTION_CUSTODY

#define COAP_SIGNALING_OPTION_CUSTODY   2

Definition at line 202 of file coap_pdu.h.

COAP_SIGNALING_OPTION_EXTENDED_TOKEN_LENGTH

#define COAP_SIGNALING_OPTION_EXTENDED_TOKEN_LENGTH   6

Definition at line 199 of file coap_pdu.h.

COAP_SIGNALING_OPTION_HOLD_OFF

#define COAP_SIGNALING_OPTION_HOLD_OFF   4

Definition at line 206 of file coap_pdu.h.

COAP_SIGNALING_OPTION_MAX_MESSAGE_SIZE

#define COAP_SIGNALING_OPTION_MAX_MESSAGE_SIZE   2

Definition at line 197 of file coap_pdu.h.

COAP_TOKEN_DEFAULT_MAX

#define COAP_TOKEN_DEFAULT_MAX   8

Definition at line 56 of file coap_pdu.h.

COAP_TOKEN_EXT_MAX

#define COAP_TOKEN_EXT_MAX   4096

Definition at line 60 of file coap_pdu.h.

COAPS_DEFAULT_PORT

#define COAPS_DEFAULT_PORT   5684 /* CoAP default UDP/TCP port for secure transmission */

Definition at line 38 of file coap_pdu.h.

Typedef Documentation

coap_mid_t

typedef int coap_mid_t

coap_mid_t is used to store the CoAP Message ID of a CoAP PDU.

Valid message ids are 0 to 2^16. Negative values are error codes.

Definition at line 263 of file coap_pdu.h.

coap_pdu_code_t

typedef enum coap_pdu_code_t coap_pdu_code_t

Set of codes available for a PDU.

coap_pdu_signaling_proto_t

typedef enum coap_pdu_signaling_proto_t coap_pdu_signaling_proto_t

coap_pdu_type_t

typedef enum coap_pdu_type_t coap_pdu_type_t

CoAP PDU message type definitions.

coap_proto_t

typedef enum coap_proto_t coap_proto_t

CoAP protocol types.

coap_request_t

typedef enum coap_request_t coap_request_t

CoAP PDU Request methods.

Enumeration Type Documentation

coap_pdu_code_t

enum coap_pdu_code_t

Set of codes available for a PDU.

Enumerator
COAP_EMPTY_CODE
COAP_REQUEST_CODE_GET
COAP_REQUEST_CODE_POST
COAP_REQUEST_CODE_PUT
COAP_REQUEST_CODE_DELETE
COAP_REQUEST_CODE_FETCH
COAP_REQUEST_CODE_PATCH
COAP_REQUEST_CODE_IPATCH
COAP_RESPONSE_CODE_CREATED
COAP_RESPONSE_CODE_DELETED
COAP_RESPONSE_CODE_VALID
COAP_RESPONSE_CODE_CHANGED
COAP_RESPONSE_CODE_CONTENT
COAP_RESPONSE_CODE_CONTINUE
COAP_RESPONSE_CODE_BAD_REQUEST
COAP_RESPONSE_CODE_UNAUTHORIZED
COAP_RESPONSE_CODE_BAD_OPTION
COAP_RESPONSE_CODE_FORBIDDEN
COAP_RESPONSE_CODE_NOT_FOUND
COAP_RESPONSE_CODE_NOT_ALLOWED
COAP_RESPONSE_CODE_NOT_ACCEPTABLE
COAP_RESPONSE_CODE_INCOMPLETE
COAP_RESPONSE_CODE_CONFLICT
COAP_RESPONSE_CODE_PRECONDITION_FAILED
COAP_RESPONSE_CODE_REQUEST_TOO_LARGE
COAP_RESPONSE_CODE_UNSUPPORTED_CONTENT_FORMAT
COAP_RESPONSE_CODE_UNPROCESSABLE
COAP_RESPONSE_CODE_TOO_MANY_REQUESTS
COAP_RESPONSE_CODE_INTERNAL_ERROR
COAP_RESPONSE_CODE_NOT_IMPLEMENTED
COAP_RESPONSE_CODE_BAD_GATEWAY
COAP_RESPONSE_CODE_SERVICE_UNAVAILABLE
COAP_RESPONSE_CODE_GATEWAY_TIMEOUT
COAP_RESPONSE_CODE_PROXYING_NOT_SUPPORTED
COAP_RESPONSE_CODE_HOP_LIMIT_REACHED
COAP_SIGNALING_CODE_CSM
COAP_SIGNALING_CODE_PING
COAP_SIGNALING_CODE_PONG
COAP_SIGNALING_CODE_RELEASE
COAP_SIGNALING_CODE_ABORT

Definition at line 326 of file coap_pdu.h.

coap_pdu_signaling_proto_t

enum coap_pdu_signaling_proto_t

Enumerator
COAP_SIGNALING_CSM
COAP_SIGNALING_PING
COAP_SIGNALING_PONG
COAP_SIGNALING_RELEASE
COAP_SIGNALING_ABORT

Definition at line 188 of file coap_pdu.h.

coap_pdu_type_t

enum coap_pdu_type_t

CoAP PDU message type definitions.

Enumerator
COAP_MESSAGE_CON
COAP_MESSAGE_NON
COAP_MESSAGE_ACK
COAP_MESSAGE_RST

Definition at line 68 of file coap_pdu.h.

coap_proto_t

enum coap_proto_t

CoAP protocol types.

Enumerator
COAP_PROTO_NONE
COAP_PROTO_UDP
COAP_PROTO_DTLS
COAP_PROTO_TCP
COAP_PROTO_TLS
COAP_PROTO_WS
COAP_PROTO_WSS
COAP_PROTO_LAST

Definition at line 312 of file coap_pdu.h.

coap_request_t

enum coap_request_t

CoAP PDU Request methods.

Enumerator
COAP_REQUEST_GET
COAP_REQUEST_POST
COAP_REQUEST_PUT
COAP_REQUEST_DELETE
COAP_REQUEST_FETCH
COAP_REQUEST_PATCH
COAP_REQUEST_IPATCH

Definition at line 78 of file coap_pdu.h.

Function Documentation

coap_add_data()

int coap_add_data	(	coap_pdu_t *	pdu,
		size_t	len,
		const uint8_t *	data
	)

Adds given data to the pdu that is passed as first parameter.

This function will fail if data has already been added to the pdu.

Parameters

pdu	The PDU where the data is to be added.
len	The length of the data.
data	The data to add.

Returns

1 if success, else 0 if failure.

Definition at line 834 of file coap_pdu.c.

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coap_add_data_after()

uint8_t * coap_add_data_after	(	coap_pdu_t *	pdu,
		size_t	len
	)

Adds given data to the pdu that is passed as first parameter but does not.

This function will fail if data has already been added to the pdu.

The actual data must be copied at the returned location.

Parameters

pdu	The PDU where the data is to be added.
len	The length of the data.

Returns

Where to copy the data of len to, or NULL is error.

Definition at line 846 of file coap_pdu.c.

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coap_add_option()

size_t coap_add_option	(	coap_pdu_t *	pdu,
		coap_option_num_t	number,
		size_t	len,
		const uint8_t *	data
	)

Adds option of given number to pdu that is passed as first parameter.

This function will fail if data has already been added to the pdu.

Hence data must be added after optional coap_add_option() has been called.

Note: Where possible, the option data needs to be stripped of leading zeros (big endian) to reduce the amount of data needed in the PDU, as well as in some cases the maximum data size of an opton can be exceeded if not stripped and hence be illegal. This is done by using coap_encode_var_safe() or coap_encode_var_safe8().

Parameters

pdu	The PDU where the option is to be added.
number	The number of the new option.
len	The length of the new option.
data	The data of the new option.

Returns

The overall length of the option or 0 on failure.

Definition at line 759 of file coap_pdu.c.

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coap_add_token()

int coap_add_token	(	coap_pdu_t *	pdu,
		size_t	len,
		const uint8_t *	data
	)

Adds token of length len to pdu.

This function will fail if a token has already been added to the pdu.

Hence options and data must be added after optional coap_add_token() has been called.

Parameters

pdu	The PDU where the token is to be added.
len	The length of the new token.
data	The token to add.

Returns

A value greater than zero on success, or 0 on error.

Definition at line 349 of file coap_pdu.c.

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coap_delete_pdu()

void coap_delete_pdu

(

coap_pdu_t *

pdu

)

Dispose of an CoAP PDU and frees associated storage.

Not that in general you should not call this function directly. When a PDU is sent with coap_send(), coap_delete_pdu() will be called automatically for you.

Parameters

pdu	The PDU for free off.

Definition at line 183 of file coap_pdu.c.

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coap_get_data()

int coap_get_data	(	const coap_pdu_t *	pdu,
		size_t *	len,
		const uint8_t **	data
	)

Retrieves the length and data pointer of specified PDU.

Returns 0 on error or 1 if *len and *data have correct values. Note that these values are destroyed with the pdu.

Parameters

pdu	The specified PDU.
len	Returns the length of the current data
data	Returns the ptr to the current data

Returns

1 if len and data are correctly filled in, else 0 if there is no data.

Definition at line 865 of file coap_pdu.c.

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coap_get_data_large()

int coap_get_data_large	(	const coap_pdu_t *	pdu,
		size_t *	len,
		const uint8_t **	data,
		size_t *	offset,
		size_t *	total
	)

Retrieves the data from a PDU, with support for large bodies of data that spans multiple PDUs.

Note: The data pointed to on return is destroyed when the PDU is destroyed.

Parameters

pdu	The specified PDU.
len	Returns the length of the current data
data	Returns the ptr to the current data
offset	Returns the offset of the current data from the start of the body comprising of many blocks (RFC7959)
total	Returns the total size of the body. If offset + length < total, then there is more data to follow.

Returns

1 if len, data, offset and total are correctly filled in, else 0 if there is no data.

Definition at line 873 of file coap_pdu.c.

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coap_new_pdu()

COAP_API coap_pdu_t * coap_new_pdu	(	coap_pdu_type_t	type,
		coap_pdu_code_t	code,
		coap_session_t *	session
	)

Creates a new CoAP PDU.

Parameters

type	The type of the PDU (one of COAP_MESSAGE_CON, COAP_MESSAGE_NON, COAP_MESSAGE_ACK, COAP_MESSAGE_RST).
code	The message code of the PDU.
session	The session that will be using this PDU

Returns

The skeletal PDU or NULL if failure.

Definition at line 159 of file coap_pdu.c.

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coap_pdu_duplicate()

COAP_API coap_pdu_t * coap_pdu_duplicate	(	const coap_pdu_t *	old_pdu,
		coap_session_t *	session,
		size_t	token_length,
		const uint8_t *	token,
		coap_opt_filter_t *	drop_options
	)

Duplicate an existing PDU.

Specific options can be ignored and not copied across. The PDU data payload is not copied across.

Parameters

old_pdu	The PDU to duplicate
session	The session that will be using this PDU.
token_length	The length of the token to use in this duplicated PDU.
token	The token to use in this duplicated PDU.
drop_options	A list of options not to copy into the duplicated PDU. If NULL, then all options are copied across.

Returns

The duplicated PDU or NULL if failure.

Definition at line 201 of file coap_pdu.c.

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coap_pdu_get_code()

coap_pdu_code_t coap_pdu_get_code

(

const coap_pdu_t *

pdu

)

Gets the PDU code associated with pdu.

Parameters

pdu	The PDU object.

Returns

The PDU code.

Definition at line 1574 of file coap_pdu.c.

coap_pdu_get_mid()

coap_mid_t coap_pdu_get_mid

(

const coap_pdu_t *

pdu

)

Gets the message id associated with pdu.

Parameters

pdu	The PDU object.

Returns

The message id.

Definition at line 1603 of file coap_pdu.c.

coap_pdu_get_token()

coap_bin_const_t coap_pdu_get_token

(

const coap_pdu_t *

pdu

)

Gets the token associated with pdu.

Parameters

pdu	The PDU object.

Returns

The token information.

Definition at line 1598 of file coap_pdu.c.

coap_pdu_get_type()

coap_pdu_type_t coap_pdu_get_type

(

const coap_pdu_t *

pdu

)

Gets the PDU type associated with pdu.

Parameters

pdu	The PDU object.

Returns

The PDU type.

Definition at line 1587 of file coap_pdu.c.

coap_pdu_init()

coap_pdu_t * coap_pdu_init	(	coap_pdu_type_t	type,
		coap_pdu_code_t	code,
		coap_mid_t	mid,
		size_t	size
	)

Creates a new CoAP PDU with at least enough storage space for the given size maximum message size.

The function returns a pointer to the node coap_pdu_t object on success, or NULL on error. The storage allocated for the result must be released with coap_delete_pdu() if coap_send() is not called.

Parameters

type	The type of the PDU (one of COAP_MESSAGE_CON, COAP_MESSAGE_NON, COAP_MESSAGE_ACK, COAP_MESSAGE_RST).
code	The message code of the PDU.
mid	The message id to set or 0 if unknown / not applicable.
size	The maximum allowed number of byte for the message.

Returns

A pointer to the new PDU object or NULL on error.

Definition at line 99 of file coap_pdu.c.

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coap_pdu_parse()

int coap_pdu_parse	(	coap_proto_t	proto,
		const uint8_t *	data,
		size_t	length,
		coap_pdu_t *	pdu
	)

Parses data into the CoAP PDU structure given in result.

The target pdu must be large enough to hold the token, options and data. This function returns 0 on error or a number greater than zero on success.

Parameters

proto	Session's protocol
data	The raw data to parse as CoAP PDU.
length	The actual size of data.
pdu	The PDU structure to fill. Note that the structure must provide space to hold the token, optional options and optional data.

Returns

1 on success or 0 on error.

Definition at line 1455 of file coap_pdu.c.

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coap_pdu_set_code()

void coap_pdu_set_code	(	coap_pdu_t *	pdu,
		coap_pdu_code_t	code
	)

Sets the PDU code in the pdu.

Parameters

pdu	The PDU object.
code	The code to set in the PDU.

Definition at line 1579 of file coap_pdu.c.

coap_pdu_set_mid()

void coap_pdu_set_mid	(	coap_pdu_t *	pdu,
		coap_mid_t	mid
	)

Sets the message id in the pdu.

Parameters

pdu	The PDU object.
mid	The message id value to set in the PDU.

Definition at line 1608 of file coap_pdu.c.

coap_pdu_set_type()

void coap_pdu_set_type	(	coap_pdu_t *	pdu,
		coap_pdu_type_t	type
	)

Sets the PDU type in the pdu.

Parameters

pdu	The PDU object.
type	The type to set for the PDU.

Definition at line 1592 of file coap_pdu.c.

coap_response_phrase()

const char * coap_response_phrase

(

unsigned char

code

)

Returns a human-readable response phrase for the specified CoAP response code.

This function returns NULL if not found.

Parameters

code	The response code for which the literal phrase should be retrieved.

Returns

A zero-terminated string describing the error, or NULL if not found.

Definition at line 940 of file coap_pdu.c.

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