+ +

Network Service Discovery

You can use 2 different protocols to perform network service discoveries to announce local services and search for remote services on a network: DNS-SD (DNS Service Discovery) and SSDP (Simple Service Discovery Protocol).

The main features of the Tizen.Network.Nsd namespace include:

+ +

Managing local services +
Registering a local service announces it over the network, allowing other devices to find and use it. You can create and register local services through the Tizen.Network.Nsd.DnssdService and Tizen.Network.Nsd.SsdpService classes, which both implement the Tizen.Network.Nsd.INsdService interface: +
- For the DNS-SD services, you can retrieve service details, such as name, type, port number and IP address, through related properties. You can also add a text record after registering the service, and set the key and value of the record. To remove a record, use its key.
- For the SSDP services, you can retrieve service details, such as name, target, and URL.
+
Discovering remote services +
You can search for remote services on the network through the Tizen.Network.Nsd.DnssdBrowser and Tizen.Network.Nsd.SsdpBrowser classes, which both implement the Tizen.Network.Nsd.INsdBrowser interface. You can also receive notifications when a service is found by registering an event handler for the ServiceFound event of the applicable class.

+ +

Prerequisites

To enable your application to use the network service discovery functionality:

To use the Tizen.Network.Nds namespace, the application has to request permission by adding the following privilege to the tizen-manifest.xml file: +
```
+<privileges>
+   <privilege>http://tizen.org/privilege/internet</privilege>
+</privileges>
+
```
+
To make your application visible in the Tizen Store only for devices that support the DNS-SD and SSDP protocols, the application must specify the following features in the tizen-manifest.xml file: +
```
+<feature name="http://tizen.org/feature/network.service_discovery.dnssd"/>
+<feature name="http://tizen.org/feature/network.service_discovery.ssdp"/>
+
```
+
To use the methods and properties of the Tizen.Network.Nsd namespace, include it in your application: +
```
+using Tizen.Network.Nsd;
+
```
+

+ +

Registering Local Services

To register and deregister a local DNS-SD service:

Register a service by creating a new instance of the Tizen.Network.Nsd.DnssdService class and using its RegisterService() method: +

+/// Register service
+INsdService service = new DnssdService("_http._tcp");
+DnssdService dnssdService = (DnssdService)service;
+dnssdService.RegisterService();
+

Deregister the service by using the DeregisterService() method. +
When the Tizen.Network.Nsd.DnssdService class instance is no longer needed, destroy it with the Dispose() method.
+
```
+/// Deregister service
+dnssdService.DeregisterService();
+dnssdService.Dispose();
+
```
+

+ +

Discovering Remote Services

To discover remote DNS-SD services:

Start discovery by creating a new instance of the Tizen.Network.Nsd.DnssdBrowser class and using its StartDiscovery() method: +

+/// Start discovery
+INsdBrowser browser = new DnssdBrowser("_http._tcp");
+DnssdBrowser dnssdBrowser = (DnssdBrowser)browser;
+dnssdBrowser.StartDiscovery();
+

When you have found the services you need, stop discovery by using the StopDiscovery() method. +
When the Tizen.Network.Nsd.DnssdBrowser class instance is no longer needed, destroy it with the Dispose() method.
+
```
+/// Stop discovery
+dnssdBrowser.StopDiscovery();
+dnssdBrowser.Dispose();
+
```
+

+ + + +