title: How to apply TLS support to PJSIP for ios
body: <p>I am creating a VoIP application for IOS.
  i am using the pjsip open source libraries for this .
  I am able to connect when i configure the pjsip to UDP .
  But i always get error code 171060 [Error creating transport: Unsupported transport (PJSIP_EUNSUPTRANSPORT) [status=171060]] </p>
  
  <p>I get it that somewhere I am making mistake while configuring the file settings for TLS.
  This is what i am doing.</p>
  
  <pre><code>pjsua_transport_config cfg;
      pjsua_transport_config_default(&amp;cfg);
      cfg.port = 5061;
      cfg.tls_setting.ca_list_file = pj_str((char*)[[[NSBundle mainBundle] pathForResource:@"ca_list" ofType:@"pem"] cStringUsingEncoding:NSUTF8StringEncoding]); // location of cacert.pem
  
      cfg.tls_setting.cert_file = pj_str((char*)[[[NSBundle mainBundle] pathForResource:@"certificate" ofType:@"pem"] cStringUsingEncoding:NSUTF8StringEncoding]); // location of cacert.pem
  
      cfg.tls_setting.privkey_file = pj_str((char*)[[[NSBundle mainBundle] pathForResource:@"pvkey" ofType:@"pem"] cStringUsingEncoding:NSUTF8StringEncoding]); //
  
      cfg.tls_setting.password = pj_str("myPassword");
      cfg.tls_setting.verify_client = PJ_TRUE;
      cfg.tls_setting.verify_server = PJ_TRUE;
      cfg.tls_setting.method = PJSIP_TLSV1_METHOD;
  
      //
      NSLog(@"******TLS********");
      //pjsua_transport_id  transport_id = 1;
      status = pjsua_transport_create(PJSIP_TRANSPORT_TLS , &amp;cfg, NULL);
  
      if (status != PJ_SUCCESS) error_exit("Error creating transport", status);
  </code></pre>
  
  <p>I have searched up and down on google on how to resolve this issue but i haven't come across any concrete solution thus far.
  Please if anyone knows can you help me??</p>