Connect the Data Synchronization Channel Through a Relay Server

To enable your client application to connect through a Relay Server, you can enter the related configuration in the application connection template through Sybase Control Center, and/or setup the configuration properties in the synchronization profile using the object API.

If a Relay Server is used, the ‘companyID’ in the SUPApplication property must correspond to the MBS farm ID that is used for the messaging client connection.

SUPConnectionProperties props = app.connectionProperties;
[props setFarmId:@"relayServer1"];

For data synchronization through a Relay Server, synchronization properties need to be set if the corresponding application connection template in Sybase Control Center does not have with the required values:

Add the certificate file provided by the Relay Server to the Resource folder of your Xcode project.
Add the following code before calling [SUP101SUP101DB subscribe]:
```
SUPConnectionProfile *sp = [SUP101SUP101DB getSynchronizationProfile];
[sp setUser:@"xxxx"]; //required
[sp setPassword:@"xxxx"]; //required
[sp setNetworkProtocol:@"https"]; // or http, optional
[sp setPortNumber:443]; // if http then corresponding port, optional
[sp setNetworkStreamParams:@"trusted_certificates=certificateName;compression=zlib;url_suffix=urlsuffixProvidedByTheRelayServer"]; // optional
```
- NetworkProtocol – http or https.
- PortNumber – the correct port number for the selected NetworkProtocol.
- NetworkStreamParams – certificateName: the name of the certificate you added in the Resource folder.
  urlsuffixProvidedByTheRelayServer: the RBS URL suffix provided by the Relay Server.

For more information on Relay Server configuration, see System Administration and Sybase Control Center for Sybase Unwired Platform.