The DNSSD API provides functions for network service discovery using DNSSD.

Required Header

#include <dns-sd.h>

Overview

DNSSD allows your application to create and register a local service. You should deregister and destroy the created local service handle if it is not available. In addition, you can browse services on a network using DNSSD API. You should stop browsing if you do not need it anymore.

Related Features

This API is related with the following features:

http://tizen.org/feature/network.service_discovery.dnssd
It is recommended to design feature related codes in your application for reliability.
You can check if a device supports the related features for this API by using System Information, thereby controlling the procedure of your application.
To ensure your application is only running on the device with specific features, please define the features in your manifest file using the manifest editor in the SDK.
More details on featuring your application can be found from Feature Element.

Functions
int	dnssd_initialize (void)
	Initializes DNSSD.
int	dnssd_deinitialize (void)
	Deinitializes DNSSD.
int	dnssd_create_local_service (const char service_type, dnssd_service_h dnssd_service)
	Creates a DNSSD local service handle.
int	dnssd_destroy_local_service (dnssd_service_h dnssd_service)
	Destroys the DNSSD local service handle.
int	dnssd_service_set_name (dnssd_service_h local_service, const char *service_name)
	Sets the name of DNSSD local service.
int	dnssd_service_set_port (dnssd_service_h local_service, int port)
	Sets the port number of DNSSD local service.
int	dnssd_service_add_txt_record (dnssd_service_h local_service, const char key, unsigned short length, const void value)
	Adds the TXT record.
int	dnssd_service_remove_txt_record (dnssd_service_h local_service, const char *key)
	Removes the TXT record.
int	dnssd_service_set_record (dnssd_service_h local_service, unsigned short type, unsigned short length, const void *data)
	Sets/updates the DNS resource record.
int	dnssd_service_unset_record (dnssd_service_h local_service, unsigned short type)
	Unsets the DNS resource record. DNS resource record for the given type must be set using dnssd_service_set_record().
int	dnssd_service_set_interface (dnssd_service_h local_service, const char *interface)
	Sets the interface name of DNSSD local service.
int	dnssd_service_get_interface (dnssd_service_h service, char **interface)
	Gets the interface name of DNSSD local/remote service.
int	dnssd_register_local_service (dnssd_service_h local_service, dnssd_registered_cb register_cb, void *user_data)
	Registers the DNSSD local service for publishing.
int	dnssd_deregister_local_service (dnssd_service_h local_service)
	Deregisters the DNSSD local service.
int	dnssd_start_browsing_service (const char service_type, dnssd_browser_h dnssd_service, dnssd_found_cb found_cb, void *user_data)
	Starts browsing the DNSSD remote service.
int	dnssd_stop_browsing_service (dnssd_browser_h dnssd_service)
	Stops browsing the DNSSD remote service.
int	dnssd_service_get_type (dnssd_service_h dnssd_service, char **service_type)
	Gets the type of DNSSD local/remote service.
int	dnssd_service_get_name (dnssd_service_h dnssd_service, char **service_name)
	Gets the name of DNSSD local/remote service.
int	dnssd_service_get_ip (dnssd_service_h dnssd_service, char ip_v4_address, char ip_v6_address)
	Gets the IP of DNSSD remote service.
int	dnssd_service_get_port (dnssd_service_h dnssd_service, int *port)
	Gets the port number of DNSSD local/remote service.
int	dnssd_service_get_all_txt_record (dnssd_service_h dnssd_service, unsigned short length, void *value)
	Gets the TXT record.
int	dnssd_browse_service (const char service_type, const char interface, dnssd_browser_h browser, dnssd_found_cb found_cb, void user_data)
	Browses the services which have service_type.
int	dnssd_cancel_browse_service (dnssd_browser_h browser)
	Cancels browsing the services.
int	dnssd_resolve_service (dnssd_service_h remote_service, dnssd_resolved_cb resolved_cb, void *user_data)
	Resolves a service browsed by dnssd_browse_service().
int	dnssd_cancel_resolve_service (dnssd_service_h remote_service)
	Cancels resolving a service.
int	dnssd_create_remote_service (const char service_type, const char service_name, const char interface, dnssd_service_h remote_service)
	Creates a DNSSD remote service handle.
int	dnssd_destroy_remote_service (dnssd_service_h remote_service)
	Destroys the DNSSD remote service handle.
Typedefs
typedef unsigned int	dnssd_service_h
	The DNSSD service handle.
typedef unsigned int	dnssd_browser_h
	The DNSSD Browser handle.
typedef void(*	dnssd_registered_cb )(dnssd_error_e result, dnssd_service_h local_service, void *user_data)
	Called when the registration of DNSSD service is finished.
typedef void(*	dnssd_found_cb )(dnssd_service_state_e service_state, dnssd_service_h remote_service, void *user_data)
	Called when a DNSSD service is found.
typedef void(*	dnssd_resolved_cb )(dnssd_error_e result, dnssd_service_h remote_service, void *user_data)
	Called when the service is resolved.

Typedef Documentation

typedef unsigned int dnssd_browser_h

The DNSSD Browser handle.

Since :: 3.0

typedef void(* dnssd_found_cb)(dnssd_service_state_e service_state, dnssd_service_h remote_service, void *user_data)

Called when a DNSSD service is found.

remote_service is valid only when service_state is DNSSD_SERVICE_STATE_AVAILABLE or DNSSD_SERVICE_STATE_UNAVAILABLE. In case of service_state DNSSD_SERVICE_STATE_UNAVAILABLE, application can only use dnssd_service_get_type() and dnssd_service_get_name(). Other get functions can only be used when service_state is DNSSD_SERVICE_STATE_AVAILABLE.

Since :: 3.0

Parameters:

[in]	service_state	The DNSSD service state of remote service
[in]	remote_service	The DNSSD remote service handle
[in]	user_data	The user data passed from the request function

See also:: dnssd_start_browsing_service()

typedef void(* dnssd_registered_cb)(dnssd_error_e result, dnssd_service_h local_service, void *user_data)

Called when the registration of DNSSD service is finished.

Since :: 3.0

Parameters:

[in]	result	The result of registration. DNSSD_ERROR_NONE Successful DNSSD_ERROR_NAME_CONFLICT Name Conflict DNSSD_ERROR_ALREADY_REGISTERED Already Registered
[in]	local_service	The DNSSD local service handle
[in]	user_data	The user data passed from the request function

See also:: dnssd_register_local_service()

typedef void(* dnssd_resolved_cb)(dnssd_error_e result, dnssd_service_h remote_service, void *user_data)

Called when the service is resolved.

The following result can be received:
DNSSD_ERROR_NONE Successful
DNSSD_ERROR_OPERATION_FAILED Operation failed

Since :: 7.0

Parameters:

[in]	result	The result of resolving.
[in]	remote_service	The resolved service.
[in]	user_data	The user data passed from the request function

See also:: dnssd_resolve_service()

typedef unsigned int dnssd_service_h

The DNSSD service handle.

Since :: 3.0

Enumeration Type Documentation

enum dnssd_error_e

Enumeration for Network Service Discovery DNSSD error code.

Since :: 3.0

Enumerator:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_OUT_OF_MEMORY	Out of memory
DNSSD_ERROR_PERMISSION_DENIED	Permission denied
DNSSD_ERROR_INVALID_OPERATION	Invalid operation
DNSSD_ERROR_INVALID_PARAMETER	Invalid function parameter
DNSSD_ERROR_NOT_SUPPORTED	Not supported
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_ALREADY_REGISTERED	Already registered
DNSSD_ERROR_NAME_CONFLICT	Name conflict
DNSSD_ERROR_SERVICE_NOT_RUNNING	Background daemon not running
DNSSD_ERROR_SERVICE_NOT_FOUND	Service not found
DNSSD_ERROR_OPERATION_FAILED	Operation failed

enum dnssd_service_state_e

Enumeration for Network Service Discovery DNSSD browse state.

Since :: 3.0

Enumerator:

DNSSD_SERVICE_STATE_AVAILABLE	Available DNS-SD service found
DNSSD_SERVICE_STATE_UNAVAILABLE	DNS-SD service not available
DNSSD_SERVICE_STATE_NAME_LOOKUP_FAILED	Lookup failure for service name
DNSSD_SERVICE_STATE_HOST_NAME_LOOKUP_FAILED	Lookup failure for host name and port number
DNSSD_SERVICE_STATE_ADDRESS_LOOKUP_FAILED	Lookup failure for IP address

Function Documentation

int dnssd_browse_service	(	const char *	service_type,
		const char *	interface,
		dnssd_browser_h *	browser,
		dnssd_found_cb	found_cb,
		void *	user_data
	)

Browses the services which have service_type.

found_cb will be called whenever a service appear or disappear from the network. Application will keep browsing until it calls dnssd_cancel_browse_service().

Since :: 7.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/internet

Remarks:: dnssd_resolve_service() should be called in found_cb if you want to get a service data such as a target host name, a port, txt record and IP addresses.; The browser should be released using dnssd_cancel_browse_service().

Parameters:

[in]	service_type	The DNSSD service type to browse.
[in]	interface	The interface name
[out]	browser	The DNSSD browse service handle
[in]	found_cb	The callback function to be called
[in]	user_data	The user data passed to the callback function

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_PERMISSION_DENIED	Permission Denied
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_cancel_browse_service()

int dnssd_cancel_browse_service ( dnssd_browser_h browser )

Cancels browsing the services.

Since :: 7.0

Parameters:

[in] browser The DNSSD browse service handle returned by dnssd_browse_service()

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_browse_service()

int dnssd_cancel_resolve_service ( dnssd_service_h remote_service )

Cancels resolving a service.

Since :: 7.0

Parameters:

[in] remote_service The DNSSD service handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_resolve_service()

int dnssd_create_local_service	(	const char *	service_type,
		dnssd_service_h *	dnssd_service
	)

Creates a DNSSD local service handle.

Since :: 3.0

Remarks:: You must release dnssd_service using dnssd_destroy_local_service().

Parameters:

[in]	service_type	The DNSSD service type. It is expressed as type followed by protocol, separated by a dot(e.g. "_ftp._tcp"). It must begin with an underscore, followed by 1-15 characters which may be letters, digits, or hyphens. The transport protocol must be "_tcp" or "_udp". New service types should be registered at http://www.dns-sd.org/ServiceTypes.html.
[out]	dnssd_service	The DNSSD local handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OUT_OF_MEMORY	Out of memory
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_destroy_local_service()

Precondition:: This API needs dnssd_initialize() before use

int dnssd_create_remote_service	(	const char *	service_type,
		const char *	service_name,
		const char *	interface,
		dnssd_service_h *	remote_service
	)

Creates a DNSSD remote service handle.

remote_service is used for dnssd_resolve_service() only.

Since :: 7.0

Remarks:: You must release remote_service using dnssd_destroy_remote_service().

Parameters:

[in]	service_type	The DNSSD service type. It is expressed as type followed by protocol, separated by a dot(e.g. "_ftp._tcp"). It must begin with an underscore, followed by 1-15 characters which may be letters, digits, or hyphens. The transport protocol must be "_tcp" or "_udp". New service types should be registered at http://www.dns-sd.org/ServiceTypes.html.
[in]	service_name	The name of DNSSD remote service
[in]	interface	The interface name
[out]	remote_service	The DNSSD remote handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OUT_OF_MEMORY	Out of memory
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_destroy_remote_service()

int dnssd_deinitialize ( void )

Deinitializes DNSSD.

Since :: 3.0

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_OPERATION	Invalid Operation

Precondition:: DNS-SD service must be initialized by dnssd_initialize().

int dnssd_deregister_local_service ( dnssd_service_h local_service )

Deregisters the DNSSD local service.

Since :: 3.0

Remarks:: You must pass only local services registered using dnssd_register_local_service().

Parameters:

[in] local_service The DNSSD local service handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service(); dnssd_register_local_service()

Precondition:: This API needs dnssd_register_local_service() before use.

int dnssd_destroy_local_service ( dnssd_service_h dnssd_service )

Destroys the DNSSD local service handle.

Destroying a local service doesn't deregister local service. If local service was registered using dnssd_register_local_service(), then it must be deregistered using dnssd_deregister_local_service() before destroying the local service.

Since :: 3.0

Remarks:: You must destroy only local services created using dnssd_create_local_service().

Parameters:

[in] dnssd_service The DNSSD local service handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_destroy_remote_service ( dnssd_service_h remote_service )

Destroys the DNSSD remote service handle.

Since :: 7.0

Remarks:: You must destroy only remote services created using dnssd_create_remote_service().

Parameters:

[in] remote_service The DNSSD remote service handle

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_remote_service()

int dnssd_initialize ( void )

Initializes DNSSD.

Since :: 3.0

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported

int dnssd_register_local_service	(	dnssd_service_h	local_service,
		dnssd_registered_cb	register_cb,
		void *	user_data
	)

Registers the DNSSD local service for publishing.

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Privilege Level:: public

Privilege:: http://tizen.org/privilege/internet

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	register_cb	The callback function to be called
[in]	user_data	The user data passed to the callback function

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_PERMISSION_DENIED	Permission Denied

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_resolve_service	(	dnssd_service_h	remote_service,
		dnssd_resolved_cb	resolved_cb,
		void *	user_data
	)

Resolves a service browsed by dnssd_browse_service().

resolved_cb will be called when a service is resolved. You can get a target host name, a port, txt record and IP addresses from resolved_cb. If you have gotten the desired results, cancel resolving service using dnssd_cancel_resolve_service().

Since :: 7.0

Privilege Level:: public

Privilege:: http://tizen.org/privilege/internet

Parameters:

[in]	remote_service	The DNSSD service handle
[in]	resolved_cb	The callback function to be called
[in]	user_data	The user data passed to the callback function

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_PERMISSION_DENIED	Permission Denied
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_browse_service(); dnssd_cancel_resolve_service()

int dnssd_service_add_txt_record	(	dnssd_service_h	local_service,
		const char *	key,
		unsigned short	length,
		const void *	value
	)

Adds the TXT record.

TXT record gives additional information about the service. Some services discovered via dnssd_start_browsing_service() may need more than just IP address and port number to completely identify the service instance. For example, A web server typically has multiple pages, each identified by its own URL. So additional data is stored in a TXT record. Check Section 6 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt for details. TXT record of known service types can be found at http://www.dns-sd.org/ServiceTypes.html. TXT record is stored in a structured form using key/value pairs.

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	key	The key of the TXT record. A null-terminated string which only contains printable ASCII values (0x20-0x7E), excluding '=' (0x3D). Keys should be 9 characters or fewer excluding NULL. Keys are case insensitive. Keys for known service types can be found at http://www.dns-sd.org/ServiceTypes.html. For details, see section 6.4 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt.
[in]	length	The length of the value of the TXT record in bytes. The total size of a typical DNS-SD TXT record is intended to be small (upto 200 bytes). For details, see section 6.2 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt
[in]	value	The value of the TXT record. It can be any binary value. For value that represents textual data, UTF-8 is STRONGLY recommended. For value that represents textual data, value_length should NOT include the terminating null (if any) at the end of the string. If NULL, then "key" will be added with no value. If non-NULL but value_length is zero, then "key=" will be added with empty value. For details see section 6.5 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_ALREADY_REGISTERED	Already Registered
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_service_get_all_txt_record	(	dnssd_service_h	dnssd_service,
		unsigned short *	length,
		void **	value
	)

Gets the TXT record.

TXT record gives additional information about the service. Some services discovered via dnssd_start_browsing_service() may need more than just IP address and port number to completely identify the service instance. For example, a web server typically has multiple pages, each identified by its own URL. So additional data is stored in a TXT record. Check Section 6 of http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt for details. TXT record of known service types can be found at http://www.dns-sd.org/ServiceTypes.html. TXT record is stored in a structured form using key/value pairs.

Since :: 3.0

Remarks:: You must release value using free().

Parameters:

[in]	dnssd_service	The DNSSD local/remote service handle
[out]	length	The length of the value of the TXT record in bytes
[out]	value	The value of the TXT record

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_get_interface	(	dnssd_service_h	service,
		char **	interface
	)

Gets the interface name of DNSSD local/remote service.

Since :: 7.0

Remarks:: You must release interface using free().

Parameters:

[in]	service	The DNSSD service handle
[out]	interface	The interface name

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory

int dnssd_service_get_ip	(	dnssd_service_h	dnssd_service,
		char **	ip_v4_address,
		char **	ip_v6_address
	)

Gets the IP of DNSSD remote service.

Since :: 3.0

Remarks:: You must release ip_v4_address, ip_v6_address using free().

Parameters:

[in]	dnssd_service	The DNSSD remote service handle
[out]	ip_v4_address	The IP version 4 address of DNSSD service. If there is no IPv4 Address, then it would contain NULL and should not be freed
[out]	ip_v6_address	The IP version 6 address of DNSSD service. If there is no IPv6 Address, then it would contain NULL and should not be freed

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_get_name	(	dnssd_service_h	dnssd_service,
		char **	service_name
	)

Gets the name of DNSSD local/remote service.

Since :: 3.0

Remarks:: You must release service_name using free().

Parameters:

[in]	dnssd_service	The DNSSD local/remote service handle
[out]	service_name	The name of DNSSD service

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_get_port	(	dnssd_service_h	dnssd_service,
		int *	port
	)

Gets the port number of DNSSD local/remote service.

Since :: 3.0

Parameters:

[in]	dnssd_service	The DNSSD service local/remote handle
[out]	port	The port number of DNSSD service

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_get_type	(	dnssd_service_h	dnssd_service,
		char **	service_type
	)

Gets the type of DNSSD local/remote service.

Since :: 3.0

Remarks:: You must release service_type using free().

Parameters:

[in]	dnssd_service	The DNSSD local/remote service handle
[out]	service_type	The type of DNSSD service. It is expressed as type followed by protocol, separated by a dot(e.g. "_ftp._tcp"). It must begin with an underscore, followed by 1-15 characters which may be letters, digits, or hyphens. The transport protocol must be "_tcp" or "_udp". New service types should be registered at http://www.dns-sd.org/ServiceTypes.html

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_remove_txt_record	(	dnssd_service_h	local_service,
		const char *	key
	)

Removes the TXT record.

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	key	The key of the TXT record to be removed

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service(); dnssd_service_add_txt_record()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_service_set_interface	(	dnssd_service_h	local_service,
		const char *	interface
	)

Sets the interface name of DNSSD local service.

The interface is the interface of network card that this service is provided (e.g. wlan0, eth0, etc.).

Since :: 7.0

Parameters:

[in]	local_service	The DNSSD service handle
[in]	interface	The interface name

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

int dnssd_service_set_name	(	dnssd_service_h	local_service,
		const char *	service_name
	)

Sets the name of DNSSD local service.

Application should set name after creating local service using dnssd_create_local_service() and before registering the local service using dnssd_register_local_service().

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	service_name	The name of DNSSD local service

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_service_set_port	(	dnssd_service_h	local_service,
		int	port
	)

Sets the port number of DNSSD local service.

Application should set port after creating local service using dnssd_create_local_service() and before registering the local service using dnssd_register_local_service().

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	port	The port number of DNSSD local service

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_service_set_record	(	dnssd_service_h	local_service,
		unsigned short	type,
		unsigned short	length,
		const void *	data
	)

Sets/updates the DNS resource record.

If the resource record for the type has been previously added using dnssd_service_set_record(), then the record will be updated. DNS resource record can be set only after local_service is registered using dnssd_register_local_service(). Data is added using dnssd_service_add_txt_record() and then obtained using dnssd_service_get_all_txt_record() to pass here.

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	type	The resource record type. For details see, RFC 1035 and RFC 2782
[in]	length	The length of the resource record in bytes
[in]	data	The data contained in resource record to be added

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_ALREADY_REGISTERED	Already Registered
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_OUT_OF_MEMORY	Out of Memory

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_service_unset_record	(	dnssd_service_h	local_service,
		unsigned short	type
	)

Unsets the DNS resource record. DNS resource record for the given type must be set using dnssd_service_set_record().

Since :: 3.0

Remarks:: You must pass only local services created using dnssd_create_local_service().

Parameters:

[in]	local_service	The DNSSD local service handle
[in]	type	The resource record type. For details, see RFC 1035 and RFC 2782

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_OPERATION_FAILED	Operation failed
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

See also:: dnssd_create_local_service()

Precondition:: This API needs dnssd_create_local_service() before use.

int dnssd_start_browsing_service	(	const char *	service_type,
		dnssd_browser_h *	dnssd_service,
		dnssd_found_cb	found_cb,
		void *	user_data
	)

Starts browsing the DNSSD remote service.

found_cb would be called only if there are any services available of service_type provided in the argument. Application will keep browsing for available/unavailable services until it calls dnssd_stop_browsing_service().

Since :: 3.0

Remarks:: The dnssd_service should be released using dnssd_stop_browsing_service().

Privilege Level:: public

Privilege:: http://tizen.org/privilege/internet

Parameters:

[in]	service_type	The DNSSD service type to browse. It is expressed as type followed by protocol, separated by a dot(e.g. "_ftp._tcp"). It must begin with an underscore, followed by 1-15 characters which may be letters, digits, or hyphens. The transport protocol must be "_tcp" or "_udp". New service types should be registered at http://www.dns-sd.org/ServiceTypes.html
[out]	dnssd_service	The DNSSD browse service handle
[in]	found_cb	The callback function to be called
[in]	user_data	The user data passed to the callback function

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized
DNSSD_ERROR_PERMISSION_DENIED	Permission Denied

Precondition:: This API needs dnssd_initialize() before use.

int dnssd_stop_browsing_service ( dnssd_browser_h dnssd_service )

Stops browsing the DNSSD remote service.

Since :: 3.0

Parameters:

[in] dnssd_service The DNSSD browse service handle returned by dnssd_start_browsing_service()

Returns:: 0 on success, otherwise negative error value

Return values:

DNSSD_ERROR_NONE	Successful
DNSSD_ERROR_INVALID_PARAMETER	Invalid parameter
DNSSD_ERROR_NOT_SUPPORTED	Not Supported
DNSSD_ERROR_SERVICE_NOT_RUNNING	Service Not Running
DNSSD_ERROR_NOT_INITIALIZED	Not Initialized

Precondition:: This API needs dnssd_start_browsing_service() before use.

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