add turn server info

Session.xcodeproj/project.pbxproj

@@ -157,6 +157,7 @@
 		7BDCFC08242186E700641C39 /* NotificationServiceExtensionContext.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7BDCFC07242186E700641C39 /* NotificationServiceExtensionContext.swift */; };
 		7BDCFC0B2421EB7600641C39 /* Localizable.strings in Resources */ = {isa = PBXBuildFile; fileRef = B6F509951AA53F760068F56A /* Localizable.strings */; };
 		7BFD1A8A2745C4F000FB91B9 /* Permissions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7BFD1A892745C4F000FB91B9 /* Permissions.swift */; };
+		7BFD1A8C2747150E00FB91B9 /* TurnServerInfo.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7BFD1A8B2747150E00FB91B9 /* TurnServerInfo.swift */; };
 		945AA2B82B621254F69FA9E8 /* Pods_SessionUtilitiesKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9117261809D69B3D7C26B8F1 /* Pods_SessionUtilitiesKit.framework */; };
 		9EE44C6B4D4A069B86112387 /* Pods_SessionSnodeKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 9559C3068280BA2383F547F7 /* Pods_SessionSnodeKit.framework */; };
 		A11CD70D17FA230600A2D1B1 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = A11CD70C17FA230600A2D1B1 /* QuartzCore.framework */; };
@@ -1146,6 +1147,7 @@
 		7BDCFC0424206E7300641C39 /* SessionNotificationServiceExtension.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = SessionNotificationServiceExtension.entitlements; sourceTree = "<group>"; };
 		7BDCFC07242186E700641C39 /* NotificationServiceExtensionContext.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NotificationServiceExtensionContext.swift; sourceTree = "<group>"; };
 		7BFD1A892745C4F000FB91B9 /* Permissions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Permissions.swift; sourceTree = "<group>"; };
+		7BFD1A8B2747150E00FB91B9 /* TurnServerInfo.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TurnServerInfo.swift; sourceTree = "<group>"; };
 		7DD180F770F8518B4E8796F2 /* Pods-SessionUtilitiesKit.app store release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SessionUtilitiesKit.app store release.xcconfig"; path = "Pods/Target Support Files/Pods-SessionUtilitiesKit/Pods-SessionUtilitiesKit.app store release.xcconfig"; sourceTree = "<group>"; };
 		8981C8F64D94D3C52EB67A2C /* Pods-SignalTests.test.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SignalTests.test.xcconfig"; path = "Pods/Target Support Files/Pods-SignalTests/Pods-SignalTests.test.xcconfig"; sourceTree = "<group>"; };
 		8EEE74B0753448C085B48721 /* Pods-SignalMessaging.app store release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-SignalMessaging.app store release.xcconfig"; path = "Pods/Target Support Files/Pods-SignalMessaging/Pods-SignalMessaging.app store release.xcconfig"; sourceTree = "<group>"; };
@@ -2423,6 +2425,7 @@
 				B8B558FE26C4E05E00693325 /* WebRTCSession+MessageHandling.swift */,
 				B8BF43B926CC95FB007828D1 /* WebRTC+Utilities.swift */,
 				7BCD116B27016062006330F1 /* WebRTCSession+DataChannel.swift */,
+				7BFD1A8B2747150E00FB91B9 /* TurnServerInfo.swift */,
 			);
 			path = Calls;
 			sourceTree = "<group>";
@@ -4703,6 +4706,7 @@
 				C3C2A74D2553A39700C340D1 /* VisibleMessage.swift in Sources */,
 				C32C5AAD256DBE8F003C73A2 /* TSInfoMessage.m in Sources */,
 				C32C5A13256DB7A5003C73A2 /* PushNotificationAPI.swift in Sources */,
+				7BFD1A8C2747150E00FB91B9 /* TurnServerInfo.swift in Sources */,
 				C32A026325A801AA000ED5D4 /* NSData+messagePadding.m in Sources */,
 				C352A3932557883D00338F3E /* JobDelegate.swift in Sources */,
 				C32C5B84256DC54F003C73A2 /* SSKEnvironment.m in Sources */,

SessionMessagingKit/Calls/TurnServerInfo.swift

@@ -0,0 +1,30 @@
+// Copyright © 2021 Rangeproof Pty Ltd. All rights reserved.
+
+import Foundation
+
+struct TurnServerInfo {
+
+    let password: String
+    let username: String
+    let urls: [String]
+
+    init?(attributes: JSON) {
+        if let passwordAttribute = (attributes["password"] as? String) {
+            password = passwordAttribute
+        } else {
+            return nil
+        }
+
+        if let usernameAttribute = attributes["username"] as? String {
+            username = usernameAttribute
+        } else {
+            return nil
+        }
+
+        if let urlsAttribute = attributes["urls"] as? [String] {
+            urls = urlsAttribute
+        } else {
+            return nil
+        }
+    }
+}

SessionMessagingKit/Calls/WebRTCSession.swift

@@ -18,6 +18,13 @@ public final class WebRTCSession : NSObject, RTCPeerConnectionDelegate {
     private var queuedICECandidates: [RTCIceCandidate] = []
     private var iceCandidateSendTimer: Timer?
     
+    private lazy var defaultICEServer: TurnServerInfo? = {
+        let url = Bundle.main.url(forResource: "Session-Turn-Server", withExtension: nil)!
+        let data = try! Data(contentsOf: url)
+        let json = try! JSONSerialization.jsonObject(with: data, options: [ .fragmentsAllowed ]) as! JSON
+        return TurnServerInfo(attributes: json)
+    }()
+    
     internal lazy var factory: RTCPeerConnectionFactory = {
         RTCInitializeSSL()
         let videoEncoderFactory = RTCDefaultVideoEncoderFactory()
@@ -30,6 +37,9 @@ public final class WebRTCSession : NSObject, RTCPeerConnectionDelegate {
     internal lazy var peerConnection: RTCPeerConnection = {
         let configuration = RTCConfiguration()
         configuration.iceServers = [ RTCIceServer(urlStrings: ["stun:freyr.getsession.org:5349"]), RTCIceServer(urlStrings: ["turn:freyr.getsession.org"], username: "session", credential: "session") ]
+        if let defaultICEServer = defaultICEServer {
+            configuration.iceServers.append(RTCIceServer(urlStrings: defaultICEServer.urls, username: defaultICEServer.username, credential: defaultICEServer.password))
+        }
         configuration.sdpSemantics = .unifiedPlan
         let constraints = RTCMediaConstraints(mandatoryConstraints: [:], optionalConstraints: [:])
         return factory.peerConnection(with: configuration, constraints: constraints, delegate: self)