Tizen Native API  5.5

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_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.

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 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_stateThe DNSSD service state of remote service
[in]remote_serviceThe DNSSD remote service handle
[in]user_dataThe 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]resultThe result of registration.
DNSSD_ERROR_NONE Successful
DNSSD_ERROR_NAME_CONFLICT Name Conflict
DNSSD_ERROR_ALREADY_REGISTERED Already Registered
[in]local_serviceThe DNSSD local service handle
[in]user_dataThe user data passed from the request function
See also:
dnssd_register_local_service()
typedef unsigned int dnssd_service_h

The DNSSD service handle.

Since :
3.0

Enumeration Type Documentation

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

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_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_typeThe 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_serviceThe DNSSD local handle
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_OUT_OF_MEMORYOut of memory
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
See also:
dnssd_destroy_local_service()
Precondition:
This API needs dnssd_initialize() before use
int dnssd_deinitialize ( void  )

Deinitializes DNSSD.

Since :
3.0
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_INVALID_OPERATIONInvalid Operation
Precondition:
DNS-SD service must be initialized by dnssd_initialize().

Deregisters the DNSSD local service.

Since :
3.0
Remarks:
You must pass only local services registered using dnssd_register_local_service().
Parameters:
[in]local_serviceThe DNSSD local service handle
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
See also:
dnssd_create_local_service()
dnssd_register_local_service()
Precondition:
This API needs dnssd_register_local_service() before use.

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_serviceThe DNSSD local service handle
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
See also:
dnssd_create_local_service()
Precondition:
This API needs dnssd_create_local_service() before use.
int dnssd_initialize ( void  )

Initializes DNSSD.

Since :
3.0
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_NOT_SUPPORTEDNot 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_serviceThe DNSSD local service handle
[in]register_cbThe callback function to be called
[in]user_dataThe user data passed to the callback function
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_OPERATION_FAILEDOperation failed
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
DNSSD_ERROR_PERMISSION_DENIEDPermission Denied
See also:
dnssd_create_local_service()
Precondition:
This API needs dnssd_create_local_service() before use.
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_serviceThe DNSSD local service handle
[in]keyThe 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]lengthThe 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]valueThe 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_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_ALREADY_REGISTEREDAlready Registered
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
DNSSD_ERROR_OUT_OF_MEMORYOut 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_serviceThe DNSSD local/remote service handle
[out]lengthThe length of the value of the TXT record in bytes
[out]valueThe value of the TXT record
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_OUT_OF_MEMORYOut of Memory
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
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_serviceThe DNSSD remote service handle
[out]ip_v4_addressThe 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_addressThe 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_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_OUT_OF_MEMORYOut of Memory
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD local/remote service handle
[out]service_nameThe name of DNSSD service
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_OUT_OF_MEMORYOut of Memory
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD service local/remote handle
[out]portThe port number of DNSSD service
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD local/remote service handle
[out]service_typeThe 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_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_OUT_OF_MEMORYOut of Memory
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD local service handle
[in]keyThe key of the TXT record to be removed
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot 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_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_serviceThe DNSSD local service handle
[in]service_nameThe name of DNSSD local service
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_OUT_OF_MEMORYOut of Memory
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD local service handle
[in]portThe port number of DNSSD local service
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_NOT_INITIALIZEDNot 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_serviceThe DNSSD local service handle
[in]typeThe resource record type. For details see, RFC 1035 and RFC 2782
[in]lengthThe length of the resource record in bytes
[in]dataThe data contained in resource record to be added
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_OPERATION_FAILEDOperation failed
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_ALREADY_REGISTEREDAlready Registered
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
DNSSD_ERROR_OUT_OF_MEMORYOut 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_serviceThe DNSSD local service handle
[in]typeThe resource record type. For details, see RFC 1035 and RFC 2782
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_OPERATION_FAILEDOperation failed
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot 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
Privilege Level:
public
Privilege:
http://tizen.org/privilege/internet
Parameters:
[in]service_typeThe 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_serviceThe DNSSD browse service handle
[in]found_cbThe callback function to be called
[in]user_dataThe user data passed to the callback function
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
DNSSD_ERROR_PERMISSION_DENIEDPermission Denied
Precondition:
This API needs dnssd_initialize() before use.

Stops browsing the DNSSD remote service.

Since :
3.0
Parameters:
[in]dnssd_serviceThe DNSSD browse service handle returned by dnssd_start_browsing_service()
Returns:
0 on success, otherwise negative error value
Return values:
DNSSD_ERROR_NONESuccessful
DNSSD_ERROR_INVALID_PARAMETERInvalid parameter
DNSSD_ERROR_NOT_SUPPORTEDNot Supported
DNSSD_ERROR_SERVICE_NOT_RUNNINGService Not Running
DNSSD_ERROR_NOT_INITIALIZEDNot Initialized
Precondition:
This API needs dnssd_start_browsing_service() before use.