[feat] use server-issued ICE configuration across clients

apps/ios/CrossDeskMobile/Bridge/CrossDeskRTCBridge.h

@@ -100,7 +100,6 @@ typedef NS_ENUM(NSInteger, CrossDeskVideoAdaptationPolicy) {
 
 - (void)configureWithSignalHost:(NSString *)host
                      signalPort:(NSInteger)signalPort
-                       turnPort:(NSInteger)turnPort
                      enableSRTP:(BOOL)enableSRTP;
 - (void)setHardwareAccelerationEnabled:(BOOL)enabled;
 - (void)setVideoAdaptationPolicy:(CrossDeskVideoAdaptationPolicy)policy;

apps/ios/CrossDeskMobile/Bridge/CrossDeskRTCBridge.mm

@@ -75,7 +75,6 @@ struct RTCState {
   CallbackContext controller_context;
   std::string signal_host;
   int signal_port = 0;
-  int turn_port = 0;
   bool enable_srtp = false;
   bool hardware_acceleration = true;
   VideoDegradationPreference video_adaptation_policy =
@@ -332,14 +331,6 @@ Params MakeParams(const RTCState &state, const std::string &user_id,
   CopyCString(params.signal_server_ip, sizeof(params.signal_server_ip),
               state.signal_host);
   params.signal_server_port = state.signal_port;
-  CopyCString(params.stun_server_ip, sizeof(params.stun_server_ip),
-              state.signal_host);
-  params.stun_server_port = state.turn_port;
-  CopyCString(params.turn_server_ip, sizeof(params.turn_server_ip),
-              state.signal_host);
-  params.turn_server_port = state.turn_port;
-  params.turn_server_username[0] = '\0';
-  params.turn_server_password[0] = '\0';
   CopyCString(params.log_path, sizeof(params.log_path), state.log_path);
   params.hardware_acceleration = state.hardware_acceleration;
   params.native_video_output = true;
@@ -442,13 +433,12 @@ Params MakeParams(const RTCState &state, const std::string &user_id,
 
 - (void)configureWithSignalHost:(NSString *)host
                      signalPort:(NSInteger)signalPort
-                       turnPort:(NSInteger)turnPort
                      enableSRTP:(BOOL)enableSRTP {
   NSString *trimmed = [host stringByTrimmingCharactersInSet:
                                 NSCharacterSet.whitespaceAndNewlineCharacterSet];
   const char *host_c_string = trimmed.UTF8String;
   const std::string host_value = host_c_string ? host_c_string : "";
-  if (host_value.empty() || signalPort <= 0 || turnPort <= 0) return;
+  if (host_value.empty() || signalPort <= 0) return;
 
   NSString *cache = NSSearchPathForDirectoriesInDomains(
                         NSCachesDirectory, NSUserDomainMask, YES)
@@ -465,7 +455,6 @@ Params MakeParams(const RTCState &state, const std::string &user_id,
   dispatch_async(_rtcQueue, ^{
     const bool unchanged = self->_state->signal_host == host_value &&
                            self->_state->signal_port == signalPort &&
-                           self->_state->turn_port == turnPort &&
                            self->_state->enable_srtp == enableSRTP &&
                            self->_state->identity_peer != nullptr;
     if (unchanged) return;
@@ -474,7 +463,6 @@ Params MakeParams(const RTCState &state, const std::string &user_id,
     [self destroyIdentityPeer];
     self->_state->signal_host = host_value;
     self->_state->signal_port = static_cast<int>(signalPort);
-    self->_state->turn_port = static_cast<int>(turnPort);
     self->_state->enable_srtp = enableSRTP;
     self->_state->log_path = log_path;
     self->_state->identity_ready = false;

apps/ios/CrossDeskMobile/ContentView.swift

@@ -716,8 +716,6 @@ private struct ServerSettingsView: View {
                         .autocorrectionDisabled()
                     TextField("信令端口", text: $session.signalPort)
                         .keyboardType(.numberPad)
-                    TextField("STUN/TURN 端口", text: $session.turnPort)
-                        .keyboardType(.numberPad)
                 }
                 Section {
                     Toggle("启用 SRTP", isOn: $session.enableSRTP)

apps/ios/CrossDeskMobile/RemoteSessionModel.swift

@@ -358,7 +358,6 @@ private final class RemoteAudioPlayer {
 final class RemoteSessionModel: NSObject, ObservableObject, CrossDeskRTCBridgeDelegate {
     @Published var signalHost = "api.crossdesk.cn"
     @Published var signalPort = "9099"
-    @Published var turnPort = "3478"
     @Published var enableSRTP = false
     @Published var mouseControlMode = MouseControlMode.saved {
         didSet { mouseControlMode.save() }
@@ -425,7 +424,6 @@ final class RemoteSessionModel: NSObject, ObservableObject, CrossDeskRTCBridgeDe
     private struct BridgeConfiguration: Equatable {
         let host: String
         let signalPort: Int
-        let turnPort: Int
         let enableSRTP: Bool
     }
     private var bridgeConfiguration: BridgeConfiguration?
@@ -453,14 +451,14 @@ final class RemoteSessionModel: NSObject, ObservableObject, CrossDeskRTCBridgeDe
     @discardableResult
     func configureBridge() -> Bool {
         let host = signalHost.trimmingCharacters(in: .whitespacesAndNewlines)
-        guard let signal = Int(signalPort), let turn = Int(turnPort),
-              (1...65535).contains(signal), (1...65535).contains(turn),
+        guard let signal = Int(signalPort),
+              (1...65535).contains(signal),
               !host.isEmpty else {
             signalStatus = "服务器配置无效"
             return false
         }
         let configuration = BridgeConfiguration(host: host, signalPort: signal,
-                                                turnPort: turn, enableSRTP: enableSRTP)
+                                                enableSRTP: enableSRTP)
         if bridgeConfiguration != configuration {
             bridgeConfiguration = configuration
             signalConnected = false
@@ -475,7 +473,6 @@ final class RemoteSessionModel: NSObject, ObservableObject, CrossDeskRTCBridgeDe
         bridge.setVideoAdaptationPolicy(videoAdaptationPolicy.bridgeValue)
         bridge.configure(withSignalHost: host,
                          signalPort: signal,
-                         turnPort: turn,
                          enableSRTP: enableSRTP)
         return true
     }