Server side

Optional group of functions OCF server support. More...

Modules
	Collection Support
	Optional group of functions to support OCF compliant collections.

Typedefs
typedef void(*	oc_con_write_cb_t) (size_t device_index, oc_rep_t *rep)
	Callback for change notifications from the oic.wk.con resource. More...
typedef void(*	oc_send_response_cb_t) (oc_request_t *request, oc_status_t response_code)
	Callback function is triggered by oc_send_response before the response is set. More...

Functions
OC_API bool	oc_add_resource (oc_resource_t *resource)
	Add a resource to the IoTivity stack. More...
OC_API void	oc_delayed_delete_resource (oc_resource_t *resource)
	Schedule a callback to remove a resource. More...
OC_API bool	oc_delete_resource (oc_resource_t *resource)
	Remove a resource from the IoTivity stack and delete the resource. More...
OC_API void	oc_device_bind_resource_type (size_t device, const char *type)
	Add a Resource Type "rt" property to the an /oic/d resource. More...
OC_API bool	oc_get_diagnostic_message (const oc_client_response_t *response, const char **msg, size_t *size)
	retrieve the diagnostic payload from a response More...
OC_API int	oc_get_query_value (const oc_request_t *request, const char *key, const char **value)
	Get a pointer to the start of the value in a URL query parameter key=value pair. More...
OC_API bool	oc_get_request_payload_raw (const oc_request_t *request, const uint8_t **payload, size_t *size, oc_content_format_t *content_format)
	retrieve the payload from the request, no processing More...
OC_API bool	oc_get_response_payload_raw (const oc_client_response_t *response, const uint8_t **payload, size_t *size, oc_content_format_t *content_format)
	retrieve the response payload, without processing More...
OC_API void	oc_ignore_request (oc_request_t *request)
	Ignore the request. More...
OC_API void	oc_indicate_separate_response (oc_request_t *request, oc_separate_response_t *response)
	Respond to an incoming request asynchronously. More...
OC_API void	oc_init_query_iterator (void)
	This resets the query iterator to the start of the URI query parameter. More...
OC_API int	oc_iterate_query (const oc_request_t *request, const char **key, size_t *key_len, const char **value, size_t *value_len)
	Iterate through the URI query parameters and get each key=value pair. More...
OC_API bool	oc_iterate_query_get_values (const oc_request_t *request, const char *key, const char **value, int *value_len)
	Iterate though the URI query parameters for a specific key. More...
OC_API oc_resource_t *	oc_new_resource (const char *name, const char *uri, uint8_t num_resource_types, size_t device) OC_NONNULL(2)
	Allocate and populate a new oc_resource_t. More...
OC_API int	oc_notify_observers (oc_resource_t *resource)
	Notify all observers of a change to a given resource's property. More...
OC_API void	oc_notify_observers_delayed (oc_resource_t *resource, uint16_t seconds)
	Schedule notify all observers to invoke after a set number of seconds. More...
OC_API void	oc_notify_observers_delayed_ms (oc_resource_t *resource, uint16_t milliseconds)
	Schedule notify all observers to invoke after a set number of milliseconds. More...
OC_API void	oc_process_baseline_interface (const oc_resource_t *resource)
	Helper function used when responding to a GET request to add Common Properties to a GET response. More...
OC_API int	oc_query_value_exists (const oc_request_t *request, const char *key)
	Checks if a query parameter 'key' exist in the URL query parameter. More...
OC_API void	oc_resource_bind_resource_interface (oc_resource_t *resource, oc_interface_mask_t iface_mask)
	Add the supported interface(s) to the resource. More...
OC_API void	oc_resource_bind_resource_type (oc_resource_t *resource, const char *type)
	Add a Resource Type "rt" property to the resource. More...
OC_API void	oc_resource_make_public (oc_resource_t *resource)
	Expose unsecured coap:// endpoints (in addition to secured coaps:// endpoints) for this resource in /oic/res. More...
OC_API void	oc_resource_set_default_interface (oc_resource_t *resource, oc_interface_mask_t iface_mask)
	Select the default interface. More...
OC_API void	oc_resource_set_discoverable (oc_resource_t *resource, bool state)
	Specify if a resource can be found using OCF discover mechanisms. More...
OC_API void	oc_resource_set_observable (oc_resource_t *resource, bool state)
	Specify that a resource should notify clients when a property has been modified. More...
OC_API void	oc_resource_set_periodic_observable (oc_resource_t *resource, uint16_t seconds)
	The resource will periodically notify observing clients of is property values. More...
OC_API void	oc_resource_set_pushable (oc_resource_t *resource, bool state)
	Specify if a resource can be pushable. More...
OC_API void	oc_resource_set_request_handler (oc_resource_t *resource, oc_method_t method, oc_request_callback_t callback, void *user_data)
	Specify a request_callback for GET, PUT, POST, and DELETE methods. More...
OC_API void	oc_resource_tag_func_desc (oc_resource_t *resource, oc_enum_t func)
	Sets the tag value for the relatvie position "tag_func_rel" tag. More...
OC_API void	oc_resource_tag_locn (oc_resource_t *resource, oc_locn_t locn)
	sets the value of the "tag_locn" tag More...
OC_API void	oc_resource_tag_pos_desc (oc_resource_t *resource, oc_pos_description_t pos)
	Sets the tag value for tag "tag-pos-desc" on the resource. More...
OC_API void	oc_resource_tag_pos_rel (oc_resource_t *resource, double x, double y, double z)
	Sets the value for the relative position "tag-pos-rel" tag. More...
OC_API void	oc_send_diagnostic_message (oc_request_t *request, const char *msg, size_t msg_len, oc_status_t response_code)
	send a diagnostic payload More...
OC_API void	oc_send_response (oc_request_t *request, oc_status_t response_code)
	Called after the response to a GET, PUT, POST or DELETE call has been prepared completed. More...
OC_API void	oc_send_response_raw (oc_request_t *request, const uint8_t *payload, size_t size, oc_content_format_t content_format, oc_status_t response_code)
	send the request, no processing More...
OC_API void	oc_send_response_with_callback (oc_request_t *request, oc_status_t response_code, bool trigger_cb)
	Called after the response to a GET, PUT, POST or DELETE call has been prepared completed. More...
OC_API void	oc_send_separate_response (oc_separate_response_t *handle, oc_status_t response_code)
	Called to send the deferred response to a GET, PUT, POST or DELETE request. More...
OC_API void	oc_set_con_write_cb (oc_con_write_cb_t callback)
	Sets the callback to receive change notifications for the oic.wk.con resource. More...
OC_API void	oc_set_send_response_callback (oc_send_response_cb_t cb)
	Set the send response callback function. More...
OC_API void	oc_set_separate_response_buffer (oc_separate_response_t *handle)
	Set a response buffer for holding the response payload. More...

Detailed Description

Optional group of functions OCF server support.

Typedef Documentation

oc_con_write_cb_t

typedef void(* oc_con_write_cb_t) (size_t device_index, oc_rep_t *rep)

Callback for change notifications from the oic.wk.con resource.

This callback is invoked to notify a change of one or more properties on the oic.wk.con resource. The rep parameter contains all properties, the function is not invoked for each property.

When the function is invoked, all properties handled by the stack are already updated. The callee can use the invocation to optionally store the new values persistently.

Once the callback returns, the response will be sent to the client and observers will be notified.

Note

As of now only the attribute "n" is supported.

The callee shall not block for too long as the stack is blocked during the invocation.

Parameters

device_index	index of the device to which the change was applied, 0 is the first device
rep	list of properties and their new values

oc_send_response_cb_t

typedef void(* oc_send_response_cb_t) (oc_request_t *request, oc_status_t response_code)

Callback function is triggered by oc_send_response before the response is set.

In this callback, the application can set/override the response payload.

Note

For separate message, pong message, and notification, this callback is not triggered.

Parameters

request	the request being responded to
response_code	the status of the response

Function Documentation

oc_add_resource()

OC_API bool oc_add_resource

(

oc_resource_t *

resource

)

Add a resource to the IoTivity stack.

The resource will be validated then added to the stack.

Parameters

[in]

resource

the resource to add to the stack

Returns

• true: the resource was successfully added to the stack.
• false: the resource can not be added to the stack.

oc_delayed_delete_resource()

OC_API void oc_delayed_delete_resource

(

oc_resource_t *

resource

)

Schedule a callback to remove a resource.

Parameters

[in]

resource

the resource to delete

oc_delete_resource()

OC_API bool oc_delete_resource

(

oc_resource_t *

resource

)

Remove a resource from the IoTivity stack and delete the resource.

Any resource observers will automatically be removed.

This will free the memory associated with the resource.

Parameters

[in]

resource

the resource to delete

Returns

• true: when the resource has been deleted and memory freed.
• false: there was an issue deleting the resource.

oc_device_bind_resource_type()

OC_API void oc_device_bind_resource_type	(	size_t	device,
		const char *	type
	)

Add a Resource Type "rt" property to the an /oic/d resource.

This function can be used to bind a new Resource Type to a logical device's /oic/d resource.

Parameters

[in]	device	index of a logical device
[in]	type	the Resource type to add to the Resource Type "rt" property (cannot be NULL)

oc_get_diagnostic_message()

OC_API bool oc_get_diagnostic_message	(	const oc_client_response_t *	response,
		const char **	msg,
		size_t *	size
	)

retrieve the diagnostic payload from a response

Parameters

response	the response to get the diagnostic payload from
msg	the diagnotic payload
size	the size of the diagnostic payload

Returns

true - retrieved payload

false

oc_get_query_value()

OC_API int oc_get_query_value	(	const oc_request_t *	request,
		const char *	key,
		const char **	value
	)

Get a pointer to the start of the value in a URL query parameter key=value pair.

Note

The char pointer returned is pointing to the string location in the query string. Do not rely on a nul terminator to find the end of the string since there may be additional query parameters.

Parameters

[in]	request	the oc_request_t that contains the query parameters
[in]	key	the key being searched for
[out]	value	pointer to the value string assigned to the key

Returns

• The position in the query string of the next key=value string pair
• -1 if there are no additional query parameters

oc_get_request_payload_raw()

OC_API bool oc_get_request_payload_raw	(	const oc_request_t *	request,
		const uint8_t **	payload,
		size_t *	size,
		oc_content_format_t *	content_format
	)

retrieve the payload from the request, no processing

Parameters

request	the request
payload	the payload of the request
size	the size in bytes of the payload
content_format	the content format of the payload

Returns

true

false

oc_get_response_payload_raw()

OC_API bool oc_get_response_payload_raw	(	const oc_client_response_t *	response,
		const uint8_t **	payload,
		size_t *	size,
		oc_content_format_t *	content_format
	)

retrieve the response payload, without processing

Parameters

response	the response
payload	the payload of the response
size	the size of the payload
content_format	the content format of the payload

Returns

true - retrieved payload

false

oc_ignore_request()

OC_API void oc_ignore_request

(

oc_request_t *

request

)

Ignore the request.

The GET, PUT, POST or DELETE requests can be ignored. For example a oc_request_callback_t may only want to respond to multicast requests. Thus any request that is not over multicast endpoint could be ignored.

Using oc_ignore(request) is preferred over oc_send_response(request, OC_IGNORE) since it does not attempt to fill the response buffer before sending the response.

Parameters

[in]

request

the request being responded to

See also

oc_request_callback_t

oc_send_response

oc_indicate_separate_response()

OC_API void oc_indicate_separate_response	(	oc_request_t *	request,
		oc_separate_response_t *	response
	)

Respond to an incoming request asynchronously.

If for some reason the response to a request would take a long time or is not immediately available, then this function may be used defer responding to the request.

Example:

static oc_separate_response_t sep_response;
 
static oc_event_callback_retval_t
handle_separate_response(void *data)
{
if (sep_response.active) {
  oc_set_separate_response_buffer(&sep_response);
  printf("Handle separate response for GET handler:\n");
  oc_rep_start_root_object();
  oc_rep_set_boolean(root, value, true);
  oc_rep_set_int(root, dimmingSetting, 75);
  oc_rep_end_root_object();
  oc_send_separate_response(&sep_response, OC_STATUS_OK);
}
return OC_EVENT_DONE;
}
 
static void
get_handler(oc_request_t *request, oc_interface_mask_t iface_mask,
            void *user_data)
{
  printf("GET handler:\n");
  oc_indicate_separate_response(request, &sep_response);
  oc_set_delayed_callback(NULL, &handle_separate_response, 10);
}

Parameters

[in]	request	the request that will be responded to as a separate response
[in]	response	instance of an internal struct that is used to track the state of the separate response.

See also

oc_set_separate_response_buffer

oc_send_separate_response

oc_init_query_iterator()

OC_API void oc_init_query_iterator

(

void

)

This resets the query iterator to the start of the URI query parameter.

This is used together with oc_iterate_query_get_values() or oc_iterate_query() to iterate through query parameter of a URI that are part of an oc_request_t

oc_iterate_query()

OC_API int oc_iterate_query	(	const oc_request_t *	request,
		const char **	key,
		size_t *	key_len,
		const char **	value,
		size_t *	value_len
	)

Iterate through the URI query parameters and get each key=value pair.

Before calling oc_iterate_query() the first time oc_init_query_iterator() must be called to reset the query iterator to the first query parameter.

Note

the char pointers returned are pointing to the string location in the query string. Do not rely on a nul terminator to find the end of the string since there may be additional query parameters.

Example:

char *value = NULL;
int value_len = -1;
char *key
oc_init_query_iterator();
while (oc_iterate_query(request, &key, &key_len, &value, &value_len) > 0) {
  printf("%.*s = %.*s\n", key_len, key, query_value_len, query_value);
}

Parameters

[in]	request	the oc_request_t that contains the query parameters
[out]	key	pointer to the location of the the key of the key=value pair
[out]	key_len	the length of the key string
[out]	value	pointer the location of the value string assigned to the key=value pair
[out]	value_len	the length of the value string

Returns

• The position in the query string of the next key=value string pair
• -1 if there are no additional query parameters

oc_iterate_query_get_values()

OC_API bool oc_iterate_query_get_values	(	const oc_request_t *	request,
		const char *	key,
		const char **	value,
		int *	value_len
	)

Iterate though the URI query parameters for a specific key.

Before calling oc_iterate_query_get_values() the first time oc_init_query_iterator() must be called to reset the query iterator to the first query parameter.

Note

The char pointer returned is pointing to the string location in the query string. Do not rely on a nul terminator to find the end of the string since there may be additional query parameters.

Example:

bool more_query_params = false;
const char* expected_value = "world"
char *value = NULL;
int value_len = -1;
oc_init_query_iterator();
do {
more_query_params = oc_iterate_query_get_values(request, "hello",
                                                &value, &value_len);
  if (rt_len > 0) {
    printf("Found %s = %.*s\n", "hello", value_len, value);
  }
} while (more_query_params);

Parameters

[in]	request	the oc_request_t that contains the query parameters (cannot be NULL)
[in]	key	the key being searched for (cannot be NULL)
[out]	value	pointer to the value string for to the key=value pair (cannot be NULL)
[out]	value_len	the length of the value string (cannot be NULL)

Returns

True if there are more query parameters to iterate through

oc_new_resource()

OC_API oc_resource_t* oc_new_resource	(	const char *	name,
		const char *	uri,
		uint8_t	num_resource_types,
		size_t	device
	)

Allocate and populate a new oc_resource_t.

Resources are the primary interface between code and real world devices.

Each resource has a Uniform Resource Identifier (URI) that identifies it. All resources must specify one or more Resource Types to be considered a valid resource. The number of Resource Types is specified by the num_resource_types the actual Resource Types are added later using the oc_resource_bind_resource_type() function.

The resource is populated with a default interface OC_IF_BASELINE.

Many properties associated with a resource are set or modified after the new resource has been created.

The resource is not added to the device till oc_add_resource() is called.

Example:

static void register_resources(void)
{
  oc_resource_t *bswitch = oc_new_resource("light switch", "/switch", 1, 0);
  oc_resource_bind_resource_type(bswitch, "oic.r.switch.binary");
  oc_resource_bind_resource_interface(bswitch, OC_IF_A);
  oc_resource_set_default_interface(bswitch, OC_IF_A);
  oc_resource_set_observable(bswitch, true);
  oc_resource_set_discoverable(bswitch, true);
  oc_resource_set_request_handler(bswitch, OC_GET, get_switch, NULL);
  oc_resource_set_request_handler(bswitch, OC_POST, post_switch, NULL);
  oc_resource_set_request_handler(bswitch, OC_PUT, put_switch, NULL);
  oc_add_resource(bswitch);
}

Parameters

[in]	name	the name of the new resource this will set the property n
[in]	uri	the Uniform Resource Identifier for the resource (cannot be NULL)
[in]	num_resource_types	the number of Resource Types that will be added/bound to the resource
[in]	device	index of the logical device the resource will be added to

See also

oc_resource_bind_resource_interface

oc_resource_set_default_interface

oc_resource_bind_resource_type

oc_process_baseline_interface

oc_resource_set_discoverable

oc_resource_set_periodic_observable

oc_resource_set_request_handler

oc_notify_observers()

OC_API int oc_notify_observers

(

oc_resource_t *

resource

)

Notify all observers of a change to a given resource's property.

Note

no need to call oc_notify_observers about resource changes that result from a PUT, or POST oc_request_callback_t.

Parameters

[in]

resource

the oc_resource_t that has a modified property

Returns

• the number observers notified on success
• 0 on failure could also mean no registered observers

oc_notify_observers_delayed()

OC_API void oc_notify_observers_delayed	(	oc_resource_t *	resource,
		uint16_t	seconds
	)

Schedule notify all observers to invoke after a set number of seconds.

Note

no need to call oc_notify_observers about resource changes that result from a PUT, or POST oc_request_callback_t.

Parameters

[in]	resource	the oc_resource_t that has a modified property
[in]	seconds	the number of seconds to wait till the callback is invoked

oc_notify_observers_delayed_ms()

OC_API void oc_notify_observers_delayed_ms	(	oc_resource_t *	resource,
		uint16_t	milliseconds
	)

Schedule notify all observers to invoke after a set number of milliseconds.

Note

no need to call oc_notify_observers about resource changes that result from a PUT, or POST oc_request_callback_t.

Parameters

[in]	resource	the oc_resource_t that has a modified property
[in]	milliseconds	the number of milliseconds to wait till the callback is invoked

oc_process_baseline_interface()

OC_API void oc_process_baseline_interface

(

const oc_resource_t *

resource

)

Helper function used when responding to a GET request to add Common Properties to a GET response.

This add Common Properties name ("n"), Interface ("if"), and Resource Type ("rt") to a GET response.

Example:

bool bswitch_state = false;
 
void get_bswitch(oc_resource_t *resource, oc_interface_mask_t iface_mask,
                 void *data)
{
  oc_rep_start_root_object();
  switch (iface_mask) {
  case OC_IF_BASELINE:
    oc_process_baseline_interface(resource);
  // fall through
  case OC_IF_A:
    oc_rep_set_boolean(root, value, bswitch_state);
    break;
  default:
    break;
  }
  oc_rep_end_root_object();
  oc_send_response(request, OC_STATUS_OK);
}

Parameters

[in]

resource

the resource the baseline Common Properties will be read from to respond to the GET request (cannot be NULL)

oc_query_value_exists()

OC_API int oc_query_value_exists	(	const oc_request_t *	request,
		const char *	key
	)

Checks if a query parameter 'key' exist in the URL query parameter.

Parameters

[in]	request	the oc_request_t that contains the query parameters
[in]	key	the key being searched for

Returns

• 1 exist
• -1 does not exist

oc_resource_bind_resource_interface()

OC_API void oc_resource_bind_resource_interface	(	oc_resource_t *	resource,
		oc_interface_mask_t	iface_mask
	)

Add the supported interface(s) to the resource.

Resource interfaces specify how the code is able to interact with the resource

The iface_mask is bitwise OR of the following interfaces:

• OC_IF_BASELINE ("oic.if.baseline") baseline interface allow GET, PUT/POST, and notify/observe operations.
• OC_IF_LL ("oic.if.ll") The links list interface is a specifically designed to provide a list of links pointing to other resources. Links list interfaces allow GET, and notify/observe operations.
• OC_IF_B ("oic.if.b") batch interface. The batch interface is used to interact with a collection of resources at the same time.
• OC_IF_R ("oic.if.r") a read-only interface. A read-only interface allows GET, and notify/observe operations.
• OC_IF_RW ("oir.if.rw") a read-write interface. A read-write interface allows GET, PUT/POST, and notify/observe operations.
• OC_IF_A ("oic.if.a") an actuator interface. An actuator interface allows GET, PUT/POST, and notify/observe operations.
• OC_IF_S ("oic.if.s") a sensor interface. A sensor interface allows GET, and notify/observe operations.
• OC_IC_CREATE ("oic.if.create") used to create new resources in a collection.

The read-write and actuator interfaces are very similar and sometimes hard to differentiate when one should be used over another. In general an actuator interface is used when it modifies the real world value. e.g. turn on light, increase temperature, open vent.

The read-only and sensor are also very similar in general a sensor value is read directly or indirectly from a real world sensor.

Parameters

[in]	resource	the resource that the interface(s) will be added to
[in]	iface_mask	a bitwise ORed list of all interfaces supported by the resource.

See also

oc_interface_mask_t

oc_resource_set_default_interface

oc_resource_bind_resource_type()

OC_API void oc_resource_bind_resource_type	(	oc_resource_t *	resource,
		const char *	type
	)

Add a Resource Type "rt" property to the resource.

All resources require at least one Resource Type. The number of Resource Types the resource contains is declared when the resource it created using oc_new_resource() function.

Resource Types use a dot "." naming scheme e.g. oic.r.switch.binary. Resource Types starting with oic are reserved for a OCF defined Resource Types. Developers are strongly encouraged to try and use an OCF defined Resource Type vs. creating their own. A repository of OCF defined resources can be found on https://github.com/openconnectivityfoundation/IoTDataModels.

Multi-value "rt" Resource means a resource with multiple Resource Types. i.e. oc_resource_bind_resource_type() is called multiple times for a single resource. When using a Mulit-value Resource the different resources properties must not conflict.

Parameters

[in]	resource	the resource that the Resource Type will be set on
[in]	type	the Resource Type to add to the Resource Type "rt" property

See also

oc_new_resource

oc_device_bind_resource_type

oc_resource_make_public()

OC_API void oc_resource_make_public

(

oc_resource_t *

resource

)

Expose unsecured coap:// endpoints (in addition to secured coaps:// endpoints) for this resource in /oic/res.

Note

While the resource may advertise unsecured endpoints, the resource shall remain inaccessible until the hosting device is configured with an anon-clear Access Control Entry (ACE).

Parameters

[in]

resource

the resource to make public

See also

oc_new_resource

oc_resource_set_default_interface()

OC_API void oc_resource_set_default_interface	(	oc_resource_t *	resource,
		oc_interface_mask_t	iface_mask
	)

Select the default interface.

The default interface must be one of the resources specified in the oc_resource_bind_resource_interface() function.

If a request to the resource comes in and the interface is not specified then the default interface will be used to service the request.

If the default interface is not set then the OC_IF_BASELINE will be used by the stack.

Parameters

[in]	resource	the resource that the default interface will be set on
[in]	iface_mask	a single interface that will will be used as the default interface

oc_resource_set_discoverable()

OC_API void oc_resource_set_discoverable	(	oc_resource_t *	resource,
		bool	state
	)

Specify if a resource can be found using OCF discover mechanisms.

Parameters

[in]	resource	to specify as discoverable or non-discoverable
[in]	state	if true the resource will be discoverable if false the resource will be non-discoverable

See also

oc_new_resource for example code using this function

oc_resource_set_observable()

OC_API void oc_resource_set_observable	(	oc_resource_t *	resource,
		bool	state
	)

Specify that a resource should notify clients when a property has been modified.

Note

this function can be used to make a periodic observable resource unobservable.

Parameters

[in]	resource	the resource to specify the observability
[in]	state	true to make resource observable, false to make resource unobservable

See also

oc_new_resource to see example code using this function

oc_resource_set_periodic_observable

oc_resource_set_periodic_observable()

OC_API void oc_resource_set_periodic_observable	(	oc_resource_t *	resource,
		uint16_t	seconds
	)

The resource will periodically notify observing clients of is property values.

The oc_resource_set_observable() function can be used to turn off a periodic observable resource.

Setting a seconds frequency of zero 0 is invalid and will result in an invalid resource.

Parameters

[in]	resource	the resource to specify the periodic observability
[in]	seconds	the frequency in seconds that the resource will send out an notification of is property values.

oc_resource_set_pushable()

OC_API void oc_resource_set_pushable	(	oc_resource_t *	resource,
		bool	state
	)

Specify if a resource can be pushable.

Parameters

[in]	resource	to specify as pushable or non-pushable
[in]	state	if true the resource will be pushable if false the resource will be non-pushable

oc_resource_set_request_handler()

OC_API void oc_resource_set_request_handler	(	oc_resource_t *	resource,
		oc_method_t	method,
		oc_request_callback_t	callback,
		void *	user_data
	)

Specify a request_callback for GET, PUT, POST, and DELETE methods.

All resources must provide at least one request handler to be a valid resource.

method types:

• OC_GET the oc_request_callback_t is responsible for returning the current value of all of the resource properties.
• OC_PUT the oc_request_callback_t is responsible for updating one or more of the resource properties.
• OC_POST the oc_request_callback_t is responsible for updating one or more of the resource properties. The callback may also be responsible for creating new resources.
• OC_DELETE the oc_request_callback_t is responsible for deleting a resource

Note

Some methods may never by invoked based on the resources Interface as well as the provisioning permissions of the client.

Parameters

[in]	resource	the resource the callback handler will be registered to
[in]	method	specify if type method the callback is responsible for handling
[in]	callback	the callback handler that will be invoked when a the method is called on the resource.
[in]	user_data	context pointer that is passed to the oc_request_callback_t. The pointer must remain valid as long as the resource exists.

See also

oc_new_resource to see example code using this function

oc_resource_tag_func_desc()

OC_API void oc_resource_tag_func_desc	(	oc_resource_t *	resource,
		oc_enum_t	func
	)

Sets the tag value for the relatvie position "tag_func_rel" tag.

Parameters

resource	the resource to apply the tag too.
func	the function description

oc_resource_tag_locn()

OC_API void oc_resource_tag_locn	(	oc_resource_t *	resource,
		oc_locn_t	locn
	)

sets the value of the "tag_locn" tag

Parameters

resource	the resource to apply the tag too.
locn	the location

oc_resource_tag_pos_desc()

OC_API void oc_resource_tag_pos_desc	(	oc_resource_t *	resource,
		oc_pos_description_t	pos
	)

Sets the tag value for tag "tag-pos-desc" on the resource.

Parameters

resource	the resource
pos	the descriptive text for the tag

oc_resource_tag_pos_rel()

OC_API void oc_resource_tag_pos_rel	(	oc_resource_t *	resource,
		double	x,
		double	y,
		double	z
	)

Sets the value for the relative position "tag-pos-rel" tag.

Parameters

resource	the resource to apply the tag too.
x	the x value in 3D space
y	the y value in 3D space
z	the z value in 3D space

oc_send_diagnostic_message()

OC_API void oc_send_diagnostic_message	(	oc_request_t *	request,
		const char *	msg,
		size_t	msg_len,
		oc_status_t	response_code
	)

send a diagnostic payload

Parameters

request	the request
msg	the message in ascii
msg_len	the lenght of the message
response_code	the coap response code

oc_send_response()

OC_API void oc_send_response	(	oc_request_t *	request,
		oc_status_t	response_code
	)

Called after the response to a GET, PUT, POST or DELETE call has been prepared completed.

The function oc_send_response is called at the end of a oc_request_callback_t to inform the caller about the status of the requested action.

Note

This function just calls oc_send_response_with_callback with trigger_cb set to false.

Parameters

[in]	request	the request being responded to
[in]	response_code	the status of the response

See also

oc_request_callback_t

oc_ignore_request

oc_indicate_separate_response

oc_send_response_with_callback

oc_send_response_raw()

OC_API void oc_send_response_raw	(	oc_request_t *	request,
		const uint8_t *	payload,
		size_t	size,
		oc_content_format_t	content_format,
		oc_status_t	response_code
	)

send the request, no processing

Parameters

request	the request to send
payload	the payload for the request
size	the payload size
content_format	the content format
response_code	the response code to send

oc_send_response_with_callback()

OC_API void oc_send_response_with_callback	(	oc_request_t *	request,
		oc_status_t	response_code,
		bool	trigger_cb
	)

Called after the response to a GET, PUT, POST or DELETE call has been prepared completed.

The function oc_send_response is called at the end of a oc_request_callback_t to inform the caller about the status of the requested action.

Parameters

[in]	request	the request being responded to
[in]	response_code	the status of the response
[in]	trigger_cb	if true, the send response callback will be triggered

Note

For libraries it is recommended to set trigger_cb to true to allow modify the response body.

See also

oc_request_callback_t

oc_ignore_request

oc_indicate_separate_response

oc_send_separate_response()

OC_API void oc_send_separate_response	(	oc_separate_response_t *	handle,
		oc_status_t	response_code
	)

Called to send the deferred response to a GET, PUT, POST or DELETE request.

The function oc_send_separate_response is called to initiate transfer of the response.

Parameters

[in]	handle	instance of the internal struct that was passed to oc_indicate_separate_response()
[in]	response_code	the status of the response

See also

oc_indicate_separate_response

oc_send_separate_response

oc_send_response

oc_ignore_request

oc_set_con_write_cb()

OC_API void oc_set_con_write_cb

(

oc_con_write_cb_t

callback

)

Sets the callback to receive change notifications for the oic.wk.con resource.

The function can be used to set or unset the callback. Whenever an attribute of the oic.wk.con resource is changed, the callback will be invoked.

Parameters

callback

The callback to register or NULL to unset it. If the function is invoked a second time, then the previously set callback is simply replaced.

oc_set_send_response_callback()

OC_API void oc_set_send_response_callback

(

oc_send_response_cb_t

cb

)

Set the send response callback function.

Note

This function is not thread safe. It should be called before oc_main_init().

Parameters

cb	that will be triggered by oc_send_response_with_callback when the trigger_cb is true.

oc_set_separate_response_buffer()

OC_API void oc_set_separate_response_buffer

(

oc_separate_response_t *

handle

)

Set a response buffer for holding the response payload.

When a deferred response is ready, pass in the same oc_separate_response_t that was handed to oc_indicate_separate_response() for delaying the initial response.

Parameters

[in]

handle

instance of the oc_separate_response_t that was passed to the oc_indicate_separate_response() function

See also

oc_indicate_separate_response

oc_send_separate_response