Public API of Nordic's LWM2M implementation. More...

Modules
	Types
	LWMW2M Bootstrap type definitions.

	Defines
	LWMW2M operation code and invalid object/instance definitions.

Data Structures
struct	lwm2m_object_prototype_t
	LWM2M object prototype structure. More...

struct	lwm2m_instance_prototype_t
	LWM2M instance structure. More...

Typedefs
typedef uint32_t(*	lwm2m_instance_callback_t )(lwm2m_instance_prototype_t p_instance, uint16_t resource_id, uint8_t op_code, coap_message_t p_request)
	Callback function upon requests on a given LWM2M resource instance. More...

typedef uint32_t(*	lwm2m_object_callback_t )(lwm2m_object_prototype_t p_object, uint16_t instance_id, uint8_t op_code, coap_message_t p_request)
	Callback function upon request on a given LWM2M object or instance create. More...

Functions
uint32_t	lwm2m_notification (lwm2m_notification_type_t type, lwm2m_remote_t *p_remote, uint8_t coap_code)
	Callback interface from the enabler interface (bootstrap/register) to the application. More...

uint32_t	lwm2m_coap_handler_root (uint8_t op_code, coap_message_t *p_request)
	CoAP Request handler for the root of the object/instance/resource hierarchy. More...

uint32_t	lwm2m_init (void)
	Initialize LWM2M library. More...

uint32_t	lwm2m_bootstrap (lwm2m_remote_t p_remote, lwm2m_client_identity_t p_id, uint16_t local_port)
	Send bootstrap request to a remote bootstrap server. More...

uint32_t	lwm2m_register (lwm2m_remote_t p_remote, lwm2m_client_identity_t p_id, lwm2m_server_config_t p_config, uint16_t local_port, uint8_t p_link_format_string, uint16_t link_format_len)
	Register with a remote LWM2M server. More...

uint32_t	lwm2m_update (lwm2m_remote_t p_remote, lwm2m_server_config_t p_config, uint16_t local_port)
	Update a registration with a remote server. More...

uint32_t	lwm2m_deregister (lwm2m_remote_t *p_remote, uint16_t local_port)
	Deregister from a remote server. More...

uint32_t	lwm2m_coap_handler_instance_add (lwm2m_instance_prototype_t *p_instance)
	Add an instance to coap_handler in order to match requests to the given instance. More...

uint32_t	lwm2m_coap_handler_instance_delete (lwm2m_instance_prototype_t *p_instance)
	Delete an instance from coap_handler in order to stop matching requests to the given instance. More...

uint32_t	lwm2m_coap_handler_object_add (lwm2m_object_prototype_t *p_object)
	Add an object to coap_handler in order to match requests to the given object. More...

uint32_t	lwm2m_coap_handler_object_delete (lwm2m_object_prototype_t *p_object)
	Delete an object from coap_handler in order to stop matching requests to the given object. More...

uint32_t	lwm2m_coap_handler_gen_link_format (uint8_t p_buffer, uint16_t p_buffer_len)
	Generate link format string based on registered objects and instances. More...

uint32_t	lwm2m_respond_with_payload (uint8_t p_payload, uint16_t payload_len, coap_message_t p_request)
	Send CoAP 2.05 Content response with the payload provided. More...

uint32_t	lwm2m_respond_with_code (coap_msg_code_t code, coap_message_t *p_request)
	Send CoAP response with a given CoAP message code. More...

Detailed Description

Public API of Nordic's LWM2M implementation.

Typedef Documentation

typedef uint32_t(* lwm2m_instance_callback_t)(lwm2m_instance_prototype_t *p_instance, uint16_t resource_id, uint8_t op_code, coap_message_t *p_request)

Callback function upon requests on a given LWM2M resource instance.

Will be called when the request is for an instance Ex. /0/1.

If no instance could be located the object callback will be called. The instance_id corresponds to the one in the URI-patch in the CoAP request and may be used to create a new instance. If the value of resource_id is set to LWM2M_INVALID_RESOURCE the callback should treated it as a call to the instance instead of a resource inside of the instance.

If a resource has been found p_instance pointer will be set, else it will be NULL.

Parameters

[in]	p_instance	Pointer to the located resource if it already exists.
[in]	resource_id	Id of the resource requested.
[in]	op_code	Opcode of the request. Values of the opcodes are defined in Types.
[in]	p_request	Pointer to the CoAP request message.

Return values

NRF_SUCCESS Will always return success.

typedef uint32_t(* lwm2m_object_callback_t)(lwm2m_object_prototype_t *p_object, uint16_t instance_id, uint8_t op_code, coap_message_t *p_request)

Callback function upon request on a given LWM2M object or instance create.

Will be called when the request is for an object Ex: /0 or /0/1 an instance and the op_code is CREATE. Depending on the CoAP request code the user might create an instance or just return the tlv of current instances. If the value of instance_id is set to LWM2M_INVALID_INSTANCE the callback should treated it as a call to the instance instead of an instance of the object.

Parameters

[in]	p_object	Pointer to the located object.
[in]	instance_id	Id of the instance requested.
[in]	op_code	Opcode of the request. Values of the opcodes are defined in Types.
[in]	p_request	Pointer to the CoAP request message.

Return values

NRF_SUCCESS Will always return success.

Function Documentation

uint32_t lwm2m_bootstrap	(	lwm2m_remote_t *	p_remote,
		lwm2m_client_identity_t *	p_id,
		uint16_t	local_port
	)

Send bootstrap request to a remote bootstrap server.

Sends a bootstrap request with specified ID to the specified remote, calls the lwm2m_notification with answer from the bootstrap server.

Parameters

[in]	p_remote	Pointer to the structure holding connection information of the remote LWM2M bootstrap server.
[in]	p_id	Pointer to the structure holding the Id of the client.
[in]	local_port	Port number of the local port to be used to send the bootstrap request.

Return values

NRF_SUCCESS	If bootstrap request to the LWM2M bootstrap server was sent successfully.
NRF_ERROR_NULL	If one of the parameters was a NULL pointer.

uint32_t lwm2m_coap_handler_gen_link_format	(	uint8_t *	p_buffer,
		uint16_t *	p_buffer_len
	)

Generate link format string based on registered objects and instances.

Note: For generation of links to work properly it is required that objects is added before instances.

Parameters

[in,out]	p_buffer	Pointer to a buffer to fill with link format encoded string. If a NULL pointer is provided the function will dry-run the function in order to calculate how much memory that is needed for the link format string.
[in,out]	p_buffer_len	As input used to indicate the length of the buffer. It will return the used amount of buffer length by reference in response. If NULL pointer is provided for p_buffer, the value by reference output will be the number of bytes needed to generate the link format string.

Return values

NRF_SUCCESS	If generation of link format string was successfull.
NRF_ERROR_NO_MEM	If the provided memory was not large enough.

uint32_t lwm2m_coap_handler_instance_add ( lwm2m_instance_prototype_t * p_instance )

Add an instance to coap_handler in order to match requests to the given instance.

Add a new LWM2M instance to the coap_handler. The application MUST initialize and allocate the additional data in the struct.

Parameters

[in] p_instance Pointer to the instance to add.

Return values

NRF_SUCCESS	If registration was successfull.
NRF_ERROR_NO_MEM	If the module was not able to add the instance. Verify that the LWM2M_COAP_HANDLER_MAX_INSTANCES setting in sdk_config.h has a correct value.

uint32_t lwm2m_coap_handler_instance_delete ( lwm2m_instance_prototype_t * p_instance )

Delete an instance from coap_handler in order to stop matching requests to the given instance.

Parameters

[in] p_instance Pointer to the instance to delete.

Return values

NRF_SUCCESS	If unregistration was a success.
NRF_ERROR_NOT_FOUND	If the given instance was not located.

uint32_t lwm2m_coap_handler_object_add ( lwm2m_object_prototype_t * p_object )

Add an object to coap_handler in order to match requests to the given object.

Add a new LWM2M object to the coap_handler. The application MUST initialize and allocate the additional data in the struct.

Parameters

[in] p_object Pointer to the object to add.

Return values

NRF_SUCCESS	If registration was successfull.
NRF_ERROR_NO_MEM	If the module was not able to add the object. Verify that the LWM2M_COAP_HANDLER_MAX_OBJECTS setting in sdk_config.h has a correct value.

uint32_t lwm2m_coap_handler_object_delete ( lwm2m_object_prototype_t * p_object )

Delete an object from coap_handler in order to stop matching requests to the given object.

Parameters

[in] p_object Pointer to the object to delete.

Return values

NRF_SUCCESS	If unregistration was a success.
NRF_ERROR_NOT_FOUND	If the given object was not located.

uint32_t lwm2m_coap_handler_root	(	uint8_t	op_code,
		coap_message_t *	p_request
	)

CoAP Request handler for the root of the object/instance/resource hierarchy.

The function is called when a request is for the lwm2m root (ie no object instance or resource).

Warning: This is an interface function. MUST BE IMPLEMENTED BY APPLICATION.

Parameters

[in]	op_code	LWM2M operation code.
[in]	p_request	Pointer to CoAP request message.

Return values

NRF_SUCCESS If the handler processed the request successfully.

uint32_t lwm2m_deregister	(	lwm2m_remote_t *	p_remote,
		uint16_t	local_port
	)

Deregister from a remote server.

Parameters

[in]	p_remote	Pointer to the structure holding connection information of the remote LWM2M server.
[in]	local_port	Port number of the local port to be used to send the deregister request.

Return values

NRF_SUCCESS If deregister request to the LWM2M server was sent out successfully.

uint32_t lwm2m_init ( void )

Initialize LWM2M library.

Return values

NRF_SUCCESS If initialization was successfull.

uint32_t lwm2m_notification	(	lwm2m_notification_type_t	type,
		lwm2m_remote_t *	p_remote,
		uint8_t	coap_code
	)

Callback interface from the enabler interface (bootstrap/register) to the application.

Warning: This is an interface function. MUST BE IMPLEMENTED BY APPLICATION.

Parameters

[in]	type	Notification type. The types are defined in lwm2m_notification_type_t.
[in]	p_remote	remote that answered the request
[in]	coap_code	coap op code from the response

Return values

NRF_SUCCESS If the client application handled the notification successfully.

uint32_t lwm2m_register	(	lwm2m_remote_t *	p_remote,
		lwm2m_client_identity_t *	p_id,
		lwm2m_server_config_t *	p_config,
		uint16_t	local_port,
		uint8_t *	p_link_format_string,
		uint16_t	link_format_len
	)

Register with a remote LWM2M server.

Parameters

[in]	p_remote	Pointer to the structure holding connection information of the remote LWM2M server.
[in]	p_id	Pointer to the structure holding the Id of the client.
[in]	p_config	Registration parameters.
[in]	local_port	Port number of the local port to be used to send the register request.
[in]	p_link_format_string	Pointer to a link format encoded string to send in the register request.
[in]	link_format_len	Length of the link format string provided.

Return values

NRF_SUCCESS If registration request to the LWM2M server was sent out successfully.

uint32_t lwm2m_respond_with_code	(	coap_msg_code_t	code,
		coap_message_t *	p_request
	)

Send CoAP response with a given CoAP message code.

Parameters

[in]	code	CoAP response code to send.
[in]	p_request	Original CoAP request. Must not be NULL.

Return values

NRF_SUCCESS If the response was sent out successfully.

uint32_t lwm2m_respond_with_payload	(	uint8_t *	p_payload,
		uint16_t	payload_len,
		coap_message_t *	p_request
	)

Send CoAP 2.05 Content response with the payload provided.

Parameters

[in]	p_payload	Pointer to the payload to send. Must not be NULL.
[in]	payload_len	Size of the payload.
[in]	p_request	Original CoAP request. Must not be NULL.

Return values

NRF_SUCCESS If the response was sent out successfully.

uint32_t lwm2m_update	(	lwm2m_remote_t *	p_remote,
		lwm2m_server_config_t *	p_config,
		uint16_t	local_port
	)

Update a registration with a remote server.

Parameters

[in]	p_remote	Pointer to the structure holding connection information of the remote LWM2M server.
[in]	p_config	Registration parameters.
[in]	local_port	Port number of the local port to be used to send the update request.

Return values

NRF_SUCCESS If update request to the LWM2M server was sent out successfully.

Modules

Data Structures

Typedefs

Functions

Detailed Description

Typedef Documentation

Function Documentation