Wifi: Add IBSS supported method

Add method isIbssSupported() to WifiManager and related classes to query wether
the driver supports IBSS mode. The query is answered by wpa_supplicants new
command "get_capability modes".

It will only return a correct result after WIFI_STATE_ENABLED has been
reached.

Change-Id: I93aa2fdff94cd897c91ec3beb7e58940d1de7b72

4 files changed, 48 insertions, 0 deletions

diff --git a/wifi/java/android/net/wifi/IWifiManager.aidl b/wifi/java/android/net/wifi/IWifiManager.aidl
index 1e67938..8049988 100644
--- a/wifi/java/android/net/wifi/IWifiManager.aidl
+++ b/wifi/java/android/net/wifi/IWifiManager.aidl
@@ -69,6 +69,8 @@ interface IWifiManager
 
     boolean isDualBandSupported();
 
+    boolean isIbssSupported();
+
     boolean saveConfiguration();
 
     DhcpInfo getDhcpInfo();
diff --git a/wifi/java/android/net/wifi/WifiManager.java b/wifi/java/android/net/wifi/WifiManager.java
index e3ef913..f74dfe1 100644
--- a/wifi/java/android/net/wifi/WifiManager.java
+++ b/wifi/java/android/net/wifi/WifiManager.java
@@ -871,6 +871,19 @@ public class WifiManager {
     }
 
     /**
+     * Check if the chipset supports IBSS (Adhoc) mode
+     * @return {@code true} if supported, {@code false} otherwise.
+     * @hide
+     */
+    public boolean isIbssSupported() {
+        try {
+            return mService.isIbssSupported();
+        } catch (RemoteException e) {
+            return false;
+        }
+    }
+
+    /**
      * Return the DHCP-assigned addresses from the last successful DHCP request,
      * if any.
      * @return the DHCP information
diff --git a/wifi/java/android/net/wifi/WifiNative.java b/wifi/java/android/net/wifi/WifiNative.java
index 733fb91..66bd90b 100644
--- a/wifi/java/android/net/wifi/WifiNative.java
+++ b/wifi/java/android/net/wifi/WifiNative.java
@@ -799,5 +799,17 @@ public class WifiNative {
         return doBooleanCommand("P2P_SERV_DISC_CANCEL_REQ " + id);
     }
 
+    public boolean getModeCapability(String mode) {
+        String ret = doStringCommand("GET_CAPABILITY modes");
+        if (!TextUtils.isEmpty(ret)) {
+            String[] tokens = ret.split(" ");
+            for (String t : tokens) {
+                if (t.compareTo(mode) == 0)
+                    return true;
+            }
+        }
+        return false;
+    }
+
     public native static boolean setMode(int mode);
 }
diff --git a/wifi/java/android/net/wifi/WifiStateMachine.java b/wifi/java/android/net/wifi/WifiStateMachine.java
index 67e8ac9..2eed0c2 100644
--- a/wifi/java/android/net/wifi/WifiStateMachine.java
+++ b/wifi/java/android/net/wifi/WifiStateMachine.java
@@ -113,6 +113,7 @@ public class WifiStateMachine extends StateMachine {
     private ConnectivityManager mCm;
 
     private final boolean mP2pSupported;
+    private boolean mIbssSupported;
     private final AtomicBoolean mP2pConnected = new AtomicBoolean(false);
     private boolean mTemporarilyDisconnectWifi = false;
     private final String mPrimaryDeviceType;
@@ -369,6 +370,9 @@ public class WifiStateMachine extends StateMachine {
     public static final int CMD_DISABLE_P2P_REQ           = BASE + 132;
     public static final int CMD_DISABLE_P2P_RSP           = BASE + 133;
 
+    /* Is IBSS mode supported by the driver? */
+    public static final int CMD_GET_IBSS_SUPPORTED        = BASE + 134;
+
     private static final int CONNECT_MODE   = 1;
     private static final int SCAN_ONLY_MODE = 2;
 
@@ -1090,6 +1094,13 @@ public class WifiStateMachine extends StateMachine {
         return mCountryCode;
     }
 
+    public int syncIsIbssSupported(AsyncChannel channel) {
+        Message resultMsg = channel.sendMessageSynchronously(CMD_GET_IBSS_SUPPORTED);
+        int result = resultMsg.arg1;
+        resultMsg.recycle();
+        return result;
+    }
+
     /**
      * Set the operational frequency band
      * @param band
@@ -1936,6 +1947,7 @@ public class WifiStateMachine extends StateMachine {
                 case CMD_ADD_OR_UPDATE_NETWORK:
                 case CMD_REMOVE_NETWORK:
                 case CMD_SAVE_CONFIG:
+                case CMD_GET_IBSS_SUPPORTED:
                     replyToMessage(message, message.what, FAILURE);
                     break;
                 case CMD_GET_CONFIGURED_NETWORKS:
@@ -2406,6 +2418,8 @@ public class WifiStateMachine extends StateMachine {
                     mWifiConfigStore.initialize();
                     initializeWpsDetails();
 
+                    mIbssSupported = mWifiNative.getModeCapability("IBSS");
+
                     sendSupplicantConnectionChangedBroadcast(true);
                     transitionTo(mDriverStartedState);
                     break;
@@ -2437,6 +2451,7 @@ public class WifiStateMachine extends StateMachine {
                 case CMD_SET_FREQUENCY_BAND:
                 case CMD_START_PACKET_FILTERING:
                 case CMD_STOP_PACKET_FILTERING:
+                case CMD_GET_IBSS_SUPPORTED:
                     deferMessage(message);
                     break;
                 default:
@@ -2583,6 +2598,9 @@ public class WifiStateMachine extends StateMachine {
                                 WifiManager.ERROR);
                     }
                     break;
+                case CMD_GET_IBSS_SUPPORTED:
+                    deferMessage(message);
+                    break;
                 default:
                     return NOT_HANDLED;
             }
@@ -2927,6 +2945,9 @@ public class WifiStateMachine extends StateMachine {
                         setSuspendOptimizationsNative(SUSPEND_DUE_TO_HIGH_PERF, true);
                     }
                     break;
+                case CMD_GET_IBSS_SUPPORTED:
+                    replyToMessage(message, message.what, mIbssSupported ? 1 : 0);
+                    break;
                 default:
                     return NOT_HANDLED;
             }