import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

netwerk/dns/mdns/libmdns/MulticastDNSAndroid.jsm

@@ -0,0 +1,244 @@
+// -*- Mode: js2; tab-width: 2; indent-tabs-mode: nil; js2-basic-offset: 2; js2-skip-preprocessor-directives: t; -*-
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+this.EXPORTED_SYMBOLS = ["MulticastDNS"];
+
+const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
+
+Cu.import("resource://gre/modules/Messaging.jsm");
+Cu.import("resource://gre/modules/Services.jsm");
+var log = Cu.import("resource://gre/modules/AndroidLog.jsm", {}).AndroidLog.d.bind(null, "MulticastDNS");
+
+const FAILURE_INTERNAL_ERROR = -65537;
+
+// Helper function for sending commands to Java.
+function send(type, data, callback) {
+  let msg = {
+    type: type
+  };
+
+  for (let i in data) {
+    try {
+      msg[i] = data[i];
+    } catch (e) {
+    }
+  }
+
+  Messaging.sendRequestForResult(msg)
+    .then(result => callback(result, null),
+          err => callback(null, typeof err === "number" ? err : FAILURE_INTERNAL_ERROR));
+}
+
+// Receives service found/lost event from NsdManager
+function ServiceManager() {
+}
+
+ServiceManager.prototype = {
+  listeners: {},
+  numListeners: 0,
+
+  registerEvent: function() {
+    log("registerEvent");
+    Messaging.addListener(this.onServiceFound.bind(this), "NsdManager:ServiceFound");
+    Messaging.addListener(this.onServiceLost.bind(this), "NsdManager:ServiceLost");
+  },
+
+  unregisterEvent: function() {
+    log("unregisterEvent");
+    Messaging.removeListener("NsdManager:ServiceFound");
+    Messaging.removeListener("NsdManager:ServiceLost");
+  },
+
+  addListener: function(aServiceType, aListener) {
+    log("addListener: " + aServiceType + ", " + aListener);
+
+    if (!this.listeners[aServiceType]) {
+      this.listeners[aServiceType] = [];
+    }
+    if (this.listeners[aServiceType].includes(aListener)) {
+      log("listener already exists");
+      return;
+    }
+
+    this.listeners[aServiceType].push(aListener);
+    ++this.numListeners;
+
+    if (this.numListeners === 1) {
+      this.registerEvent();
+    }
+
+    log("listener added: " + this);
+  },
+
+  removeListener: function(aServiceType, aListener) {
+    log("removeListener: " + aServiceType + ", " + aListener);
+
+    if (!this.listeners[aServiceType]) {
+      log("listener doesn't exist");
+      return;
+    }
+    let index = this.listeners[aServiceType].indexOf(aListener);
+    if (index < 0) {
+      log("listener doesn't exist");
+      return;
+    }
+
+    this.listeners[aServiceType].splice(index, 1);
+    --this.numListeners;
+
+    if (this.numListeners === 0) {
+      this.unregisterEvent();
+    }
+
+    log("listener removed" + this);
+  },
+
+  onServiceFound: function(aServiceInfo) {
+    let listeners = this.listeners[aServiceInfo.serviceType];
+    if (listeners) {
+      for (let listener of listeners) {
+        listener.onServiceFound(aServiceInfo);
+      }
+    } else {
+      log("no listener");
+    }
+    return {};
+  },
+
+  onServiceLost: function(aServiceInfo) {
+    let listeners = this.listeners[aServiceInfo.serviceType];
+    if (listeners) {
+      for (let listener of listeners) {
+        listener.onServiceLost(aServiceInfo);
+      }
+    } else {
+      log("no listener");
+    }
+    return {};
+  }
+};
+
+// make an object from nsIPropertyBag2
+function parsePropertyBag2(bag) {
+  if (!bag || !(bag instanceof Ci.nsIPropertyBag2)) {
+    throw new TypeError("Not a property bag");
+  }
+
+  let attributes = [];
+  let enumerator = bag.enumerator;
+  while (enumerator.hasMoreElements()) {
+    let name = enumerator.getNext().QueryInterface(Ci.nsIProperty).name;
+    let value = bag.getPropertyAsACString(name);
+    attributes.push({
+      "name": name,
+      "value": value
+    });
+  }
+
+  return attributes;
+}
+
+function MulticastDNS() {
+  this.serviceManager = new ServiceManager();
+}
+
+MulticastDNS.prototype = {
+  startDiscovery: function(aServiceType, aListener) {
+    this.serviceManager.addListener(aServiceType, aListener);
+
+    let serviceInfo = {
+      serviceType: aServiceType,
+      uniqueId: aListener.uuid
+    };
+
+    send("NsdManager:DiscoverServices", serviceInfo, (result, err) => {
+      if (err) {
+        log("onStartDiscoveryFailed: " + aServiceType + " (" + err + ")");
+        this.serviceManager.removeListener(aServiceType, aListener);
+        aListener.onStartDiscoveryFailed(aServiceType, err);
+      } else {
+        aListener.onDiscoveryStarted(result);
+      }
+    });
+  },
+
+  stopDiscovery: function(aServiceType, aListener) {
+    this.serviceManager.removeListener(aServiceType, aListener);
+
+    let serviceInfo = {
+      uniqueId: aListener.uuid
+    };
+
+    send("NsdManager:StopServiceDiscovery", serviceInfo, (result, err) => {
+      if (err) {
+        log("onStopDiscoveryFailed: " + aServiceType + " (" + err + ")");
+        aListener.onStopDiscoveryFailed(aServiceType, err);
+      } else {
+        aListener.onDiscoveryStopped(aServiceType);
+      }
+    });
+  },
+
+  registerService: function(aServiceInfo, aListener) {
+    let serviceInfo = {
+      port: aServiceInfo.port,
+      serviceType: aServiceInfo.serviceType,
+      uniqueId: aListener.uuid
+    };
+
+    try {
+      serviceInfo.host = aServiceInfo.host;
+    } catch(e) {
+      // host unspecified
+    }
+    try {
+      serviceInfo.serviceName = aServiceInfo.serviceName;
+    } catch(e) {
+      // serviceName unspecified
+    }
+    try {
+      serviceInfo.attributes = parsePropertyBag2(aServiceInfo.attributes);
+    } catch(e) {
+      // attributes unspecified
+    }
+
+    send("NsdManager:RegisterService", serviceInfo, (result, err) => {
+      if (err) {
+        log("onRegistrationFailed: (" + err + ")");
+        aListener.onRegistrationFailed(aServiceInfo, err);
+      } else {
+        aListener.onServiceRegistered(result);
+      }
+    });
+  },
+
+  unregisterService: function(aServiceInfo, aListener) {
+    let serviceInfo = {
+      uniqueId: aListener.uuid
+    };
+
+    send("NsdManager:UnregisterService", serviceInfo, (result, err) => {
+      if (err) {
+        log("onUnregistrationFailed: (" + err + ")");
+        aListener.onUnregistrationFailed(aServiceInfo, err);
+      } else {
+        aListener.onServiceUnregistered(aServiceInfo);
+      }
+    });
+  },
+
+  resolveService: function(aServiceInfo, aListener) {
+    send("NsdManager:ResolveService", aServiceInfo, (result, err) => {
+      if (err) {
+        log("onResolveFailed: (" + err + ")");
+        aListener.onResolveFailed(aServiceInfo, err);
+      } else {
+        aListener.onServiceResolved(result);
+      }
+    });
+  }
+};