Add support for requestPersistentGroupInfo

2018-04-21 17:22:53 -07:00
parent 8ead85b75c
commit e3a1003c80
4 changed files with 149 additions and 80 deletions
--- a/mobile/src/main/java/be/mygod/vpnhotspot/net/WifiP2pManagerHelper.kt
+++ b/mobile/src/main/java/be/mygod/vpnhotspot/net/WifiP2pManagerHelper.kt
@@ -0,0 +1,119 @@
+package be.mygod.vpnhotspot.net
+
+import android.annotation.SuppressLint
+import android.net.wifi.WpsInfo
+import android.net.wifi.p2p.WifiP2pGroup
+import android.net.wifi.p2p.WifiP2pManager
+import android.util.Log
+import com.android.dx.stock.ProxyBuilder
+import java.lang.reflect.Proxy
+import java.util.regex.Pattern
+
+object WifiP2pManagerHelper {
+    /** Interface for callback invocation when stored group info list is available {@hide} */
+    interface PersistentGroupInfoListener {
+        /**
+         * The requested stored p2p group info list is available
+         * @param groups Wi-Fi p2p group info list
+         */
+        fun onPersistentGroupInfoAvailable(groups: Collection<WifiP2pGroup>)
+    }
+
+    const val TAG = "WifiP2pManagerHelper"
+    const val TEMPORARY_NET_ID = -1
+
+    /**
+     * Matches the output of dumpsys wifip2p. This part is available since Android 4.2.
+     *
+     * Related sources:
+     *   https://android.googlesource.com/platform/frameworks/base/+/f0afe4144d09aa9b980cffd444911ab118fa9cbe%5E%21/wifi/java/android/net/wifi/p2p/WifiP2pService.java
+     *   https://android.googlesource.com/platform/frameworks/opt/net/wifi/+/a8d5e40/service/java/com/android/server/wifi/p2p/WifiP2pServiceImpl.java#639
+     *
+     *   https://android.googlesource.com/platform/frameworks/base.git/+/android-5.0.0_r1/core/java/android/net/NetworkInfo.java#433
+     *   https://android.googlesource.com/platform/frameworks/base.git/+/220871a/core/java/android/net/NetworkInfo.java#415
+     */
+    val patternNetworkInfo = "^mNetworkInfo .* (isA|a)vailable: (true|false)".toPattern(Pattern.MULTILINE)
+
+    /**
+     * Available since Android 4.4.
+     *
+     * Source: https://android.googlesource.com/platform/frameworks/base/+/android-4.4_r1/wifi/java/android/net/wifi/p2p/WifiP2pManager.java#994
+     * Implementation: https://android.googlesource.com/platform/frameworks/opt/net/wifi/+/d72d2f4/service/java/com/android/server/wifi/p2p/SupplicantP2pIfaceHal.java#1159
+     */
+    private val setWifiP2pChannels by lazy {
+        WifiP2pManager::class.java.getDeclaredMethod("setWifiP2pChannels", WifiP2pManager.Channel::class.java,
+                Int::class.java, Int::class.java, WifiP2pManager.ActionListener::class.java)
+    }
+    fun WifiP2pManager.setWifiP2pChannels(c: WifiP2pManager.Channel, lc: Int, oc: Int,
+                                                  listener: WifiP2pManager.ActionListener) {
+        setWifiP2pChannels.invoke(this, c, lc, oc, listener)
+    }
+
+    /**
+     * Available since Android 4.3.
+     *
+     * Source: https://android.googlesource.com/platform/frameworks/base/+/android-4.3_r0.9/wifi/java/android/net/wifi/p2p/WifiP2pManager.java#958
+     */
+    private val startWps by lazy {
+        WifiP2pManager::class.java.getDeclaredMethod("startWps",
+                WifiP2pManager.Channel::class.java, WpsInfo::class.java, WifiP2pManager.ActionListener::class.java)
+    }
+    fun WifiP2pManager.startWps(c: WifiP2pManager.Channel, wps: WpsInfo,
+                                        listener: WifiP2pManager.ActionListener) {
+        startWps.invoke(this, c, wps, listener)
+    }
+
+    /**
+     * Available since Android 4.2.
+     *
+     * Source: https://android.googlesource.com/platform/frameworks/base/+/android-4.2_r1/wifi/java/android/net/wifi/p2p/WifiP2pManager.java#1353
+     */
+    private val deletePersistentGroup by lazy {
+        WifiP2pManager::class.java.getDeclaredMethod("deletePersistentGroup",
+                WifiP2pManager.Channel::class.java, Int::class.java, WifiP2pManager.ActionListener::class.java)
+    }
+    fun WifiP2pManager.deletePersistentGroup(c: WifiP2pManager.Channel, netId: Int,
+                                                     listener: WifiP2pManager.ActionListener) {
+        deletePersistentGroup.invoke(this, c, netId, listener)
+    }
+
+    private val interfacePersistentGroupInfoListener by lazy @SuppressLint("PrivateApi") {
+        Class.forName("android.net.wifi.p2p.WifiP2pManager\$PersistentGroupInfoListener")
+    }
+    private val getGroupList by lazy @SuppressLint("PrivateApi") {
+        Class.forName("android.net.wifi.p2p.WifiP2pGroupList").getDeclaredMethod("getGroupList")
+    }
+    private val requestPersistentGroupInfo by lazy {
+        WifiP2pManager::class.java.getDeclaredMethod("requestPersistentGroupInfo",
+                WifiP2pManager.Channel::class.java, interfacePersistentGroupInfoListener)
+    }
+    /**
+     * Request a list of all the persistent p2p groups stored in system.
+     *
+     * @param c is the channel created at {@link #initialize}
+     * @param listener for callback when persistent group info list is available. Can be null.
+     */
+    fun WifiP2pManager.requestPersistentGroupInfo(c: WifiP2pManager.Channel,
+                                                  listener: (Collection<WifiP2pGroup>) -> Unit) {
+        val proxy = Proxy.newProxyInstance(interfacePersistentGroupInfoListener.classLoader,
+                arrayOf(interfacePersistentGroupInfoListener), { proxy, method, args ->
+            if (method.name == "onPersistentGroupInfoAvailable") {
+                if (args.size != 1) Log.w(TAG, "Unexpected args: $args")
+                listener(getGroupList.invoke(args[0]) as Collection<WifiP2pGroup>)
+                null
+            } else {
+                Log.w(TAG, "Unexpected method, calling super: $method")
+                ProxyBuilder.callSuper(proxy, method, args)
+            }
+        })
+        requestPersistentGroupInfo.invoke(this, c, proxy)
+    }
+
+    /**
+     * Available since Android 4.2.
+     *
+     * Source: https://android.googlesource.com/platform/frameworks/base/+/android-4.2_r1/wifi/java/android/net/wifi/p2p/WifiP2pGroup.java#253
+     */
+    private val getNetworkId by lazy { WifiP2pGroup::class.java.getDeclaredMethod("getNetworkId") }
+    val WifiP2pGroup.netId get() = getNetworkId.invoke(this) as Int
+}