Bug 1049460 - Change wpa_supplicant mux/demux method on KK to enable wifi direct. r=vchang

--HG--
extra : rebase_source : 0633f2b2999d9aca03543463164b3de83b67f4f5

dom/wifi/DOMWifiP2pManager.js

@@ -149,7 +149,7 @@ MozWifiP2pManager.prototype = {
 
      case "WifiP2pManager:getPeerList:Return:OK":
         request = this.takeRequest(msg.rid);
-        Services.DOMRequest.fireSuccess(request, msg.data);
+        Services.DOMRequest.fireSuccess(request, Cu.cloneInto(msg.data, this._window));
         break;
 
       case "WifiP2pManager:getPeerList:Return:NO":

dom/wifi/WifiCommand.jsm

@@ -25,6 +25,13 @@ this.WifiCommand = function(aControlMessage, aInterface, aSdkVersion) {
 
   var command = {};
 
+  //-------------------------------------------------
+  // Utilities.
+  //-------------------------------------------------
+  command.getSdkVersion = function() {
+    return aSdkVersion;
+  };
+
   //-------------------------------------------------
   // General commands.
   //-------------------------------------------------

dom/wifi/WifiP2pManager.jsm

@@ -608,18 +608,28 @@ function P2pStateMachine(aP2pCommand, aNetUtil) {
 
       _sm.pause();
 
-      // Step 1: Connect to p2p0.
+      // This function will only call back on success.
+      function connectToSupplicantIfNeeded(callback) {
+        if (aP2pCommand.getSdkVersion() >= 19) {
+          // No need to connect to supplicant on KK. Call back directly.
+          callback();
+          return;
+        }
         aP2pCommand.connectToSupplicant(function (status) {
-        let detail;
-
           if (0 !== status) {
             debug('Failed to connect to p2p0');
             onFailure();
             return;
           }
-
           debug('wpa_supplicant p2p0 connected!');
           _onSupplicantConnected();
+          callback();
+        });
+      }
+
+      // Step 1: Connect to p2p0 if needed.
+      connectToSupplicantIfNeeded(function callback () {
+        let detail;
 
         // Step 2: Get MAC address.
         if (!_localDevice.address) {

dom/wifi/WifiProxyService.cpp

@@ -174,6 +174,14 @@ WifiProxyService::Start(nsIWifiEventListener* aListener,
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(aListener);
 
+#if ANDROID_VERSION >= 19
+  // KK changes the way mux'ing/demux'ing different supplicant interfaces
+  // (e.g. wlan0/p2p0) from multi-sockets to single socket embedded with
+  // prefixed interface name (e.g. IFNAME=wlan0 xxxxxx). Therefore, we use
+  // the first given interface as the global interface for KK.
+  aNumOfInterfaces = 1;
+#endif
+
   nsresult rv;
 
   // Since EventRunnable runs in the manner of blocking, we have to
@@ -250,6 +258,14 @@ WifiProxyService::WaitForEvent(const nsACString& aInterface)
 {
   MOZ_ASSERT(NS_IsMainThread());
 
+#if ANDROID_VERSION >= 19
+  // We will only have one global interface for KK.
+  if (!mEventThreadList.IsEmpty()) {
+    nsCOMPtr<nsIRunnable> runnable = new EventRunnable(aInterface);
+    mEventThreadList[0].mThread->Dispatch(runnable, nsIEventTarget::DISPATCH_NORMAL);
+    return NS_OK;
+  }
+#else
   // Dispatch to the event thread which has the given interface name
   for (size_t i = 0; i < mEventThreadList.Length(); i++) {
     if (mEventThreadList[i].mInterface.Equals(aInterface)) {
@@ -258,6 +274,7 @@ WifiProxyService::WaitForEvent(const nsACString& aInterface)
       return NS_OK;
     }
   }
+#endif
 
   return NS_ERROR_FAILURE;
 }
@@ -282,16 +299,27 @@ void
 WifiProxyService::DispatchWifiEvent(const nsAString& aEvent, const nsACString& aInterface)
 {
   MOZ_ASSERT(NS_IsMainThread());
+
+#if ANDROID_VERSION < 19
+  mListener->OnWaitEvent(aEvent, aInterface);
+#else
+  // The interface might be embedded in the event string such as
+  // "IFNAME=wlan0 CTRL-EVENT-BSS-ADDED 65 3c:94:d5:7c:11:8b".
+  // Parse the interface name from the event string and use p2p0
+  // as the default interface if "IFNAME" is not found.
   nsAutoString event;
+  nsAutoString embeddedInterface(NS_LITERAL_STRING("p2p0"));
   if (StringBeginsWith(aEvent, NS_LITERAL_STRING("IFNAME"))) {
-    // Jump over IFNAME for gonk-kk.
+    int32_t ifnameFrom = aEvent.FindChar('=') + 1;
+    int32_t ifnameTo = aEvent.FindChar(' ') - 1;
+    embeddedInterface = Substring(aEvent, ifnameFrom, ifnameTo - ifnameFrom + 1);
     event = Substring(aEvent, aEvent.FindChar(' ') + 1);
   }
   else {
     event = aEvent;
   }
-  // Call the listener.
-  mListener->OnWaitEvent(event, aInterface);
+  mListener->OnWaitEvent(event, NS_ConvertUTF16toUTF8(embeddedInterface));
+#endif
 }
 
 NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(WifiProxyService,

dom/wifi/WifiWorker.js

@@ -134,7 +134,11 @@ var WifiManager = (function() {
       if (manager.ifname === iface && handleEvent(event)) {
         waitForEvent(iface);
       } else if (p2pSupported) {
-        if (WifiP2pManager.INTERFACE_NAME === iface) {
+        // Please refer to
+        // http://androidxref.com/4.4.2_r1/xref/frameworks/base/wifi/java/android/net/wifi/WifiMonitor.java#519
+        // for interface event mux/demux rules. In short words, both
+        // 'p2p0' and 'p2p-' should go to Wifi P2P state machine.
+        if (WifiP2pManager.INTERFACE_NAME === iface || -1 !== iface.indexOf('p2p-')) {
           // If the connection is closed, wifi.c::wifi_wait_for_event()
           // will still return 'CTRL-EVENT-TERMINATING  - connection closed'
           // rather than blocking. So when we see this special event string,