Add IPv6 addresses to connected devices

mobile/src/main/java/be/mygod/vpnhotspot/RepeaterFragment.kt

@@ -29,6 +29,7 @@ import be.mygod.vpnhotspot.net.IpNeighbourMonitor
 import be.mygod.vpnhotspot.net.ConnectivityManagerHelper
 import be.mygod.vpnhotspot.net.TetherType
 import java.net.NetworkInterface
+import java.util.*
 
 class RepeaterFragment : Fragment(), ServiceConnection, Toolbar.OnMenuItemClickListener, IpNeighbourMonitor.Callback {
     inner class Data : BaseObservable() {
@@ -79,19 +80,21 @@ class RepeaterFragment : Fragment(), ServiceConnection, Toolbar.OnMenuItemClickL
         val statusListener = broadcastReceiver { _, _ -> onStatusChanged() }
     }
 
-    inner class Client(p2p: WifiP2pDevice? = null, private val neighbour: IpNeighbour? = null) {
-        private val iface = neighbour?.dev ?: p2pInterface!!
-        val mac = neighbour?.lladdr ?: p2p!!.deviceAddress!!
-        val ip = neighbour?.ip
+    inner class Client(p2p: WifiP2pDevice? = null, neighbour: IpNeighbour? = null) {
+        val iface = neighbour?.dev ?: p2pInterface!!
+        val mac = p2p?.deviceAddress ?: neighbour?.lladdr!!
+        val ip = TreeMap<String, IpNeighbour.State>()
 
         val icon get() = TetherType.ofInterface(iface, p2pInterface).icon
-        val title get() = listOf(ip, mac).filter { !it.isNullOrEmpty() }.joinToString("\t\t")
-        val description get() = getString(when (neighbour?.state) {
-            IpNeighbour.State.INCOMPLETE, null -> R.string.connected_state_incomplete
+        val title get() = "$mac%$iface"
+        val description get() = ip.entries.joinToString("\n") { (ip, state) ->
+            getString(when (state) {
+                IpNeighbour.State.INCOMPLETE -> R.string.connected_state_incomplete
                 IpNeighbour.State.VALID -> R.string.connected_state_valid
                 IpNeighbour.State.FAILED -> R.string.connected_state_failed
-            else -> throw IllegalStateException("Invalid IpNeighbour.State")
-        }, iface)
+                else -> throw IllegalStateException("Invalid IpNeighbour.State: $state")
+            }, ip)
+        }
     }
     private class ClientViewHolder(val binding: ListitemClientBinding) : RecyclerView.ViewHolder(binding.root)
     private inner class ClientAdapter : RecyclerView.Adapter<ClientViewHolder>() {
@@ -100,15 +103,20 @@ class RepeaterFragment : Fragment(), ServiceConnection, Toolbar.OnMenuItemClickL
         var neighbours = emptyList<IpNeighbour>()
 
         fun recreate() {
+            val p2p = HashMap(p2p.associateBy({ Pair(p2pInterface, it.deviceAddress) }, { Client(it) }))
+            for (neighbour in neighbours) {
+                val key = Pair(neighbour.dev, neighbour.lladdr)
+                var client = p2p[key]
+                if (client == null) {
+                    if (!tetheredInterfaces.contains(neighbour.dev)) continue
+                    client = Client(neighbour = neighbour)
+                    p2p[key] = client
+                }
+                client.ip += Pair(neighbour.ip, neighbour.state)
+            }
             clients.clear()
-            val p2p = HashMap(p2p.associateBy { it.deviceAddress })
-            for (neighbour in neighbours)
-                if (neighbour.dev == p2pInterface) {
-                    val client = p2p.remove(neighbour.lladdr)
-                    if (client != null) clients.add(Client(client, neighbour))
-                } else if (tetheredInterfaces.contains(neighbour.dev)) clients.add(Client(neighbour = neighbour))
-            clients.addAll(p2p.map { Client(it.value) })
-            clients.sortWith(compareBy<Client> { it.ip }.thenBy { it.mac })
+            clients.addAll(p2p.values)
+            clients.sortWith(compareBy<Client> { it.iface }.thenBy { it.mac })
             notifyDataSetChanged()  // recreate everything
             binding.swipeRefresher.isRefreshing = false
         }

mobile/src/main/java/be/mygod/vpnhotspot/TetheringService.kt

@@ -101,7 +101,10 @@ class TetheringService : Service(), VpnMonitor.Callback, IpNeighbourMonitor.Call
     }
     override fun postIpNeighbourAvailable() {
         val sizeLookup = neighbours.groupBy { it.dev }.mapValues { (_, neighbours) ->
-            neighbours.count { it.state != IpNeighbour.State.FAILED }
+            neighbours
+                    .filter { it.state != IpNeighbour.State.FAILED }
+                    .distinctBy { it.lladdr }
+                    .size
         }
         ServiceNotification.startForeground(this, routings.keys.associate { Pair(it, sizeLookup[it] ?: 0) })
     }

mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbour.kt

@@ -16,10 +16,10 @@ data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val
          * Parser based on:
          *   https://android.googlesource.com/platform/external/iproute2/+/ad0a6a2/ip/ipneigh.c#194
          *   https://people.cs.clemson.edu/~westall/853/notes/arpstate.pdf
-         * Assumptions: IP addr (key) always present, IPv4 only, RTM_GETNEIGH is never used and show_stats = 0
+         * Assumptions: IP addr (key) always present, RTM_GETNEIGH is never used and show_stats = 0
          */
-        private val parser =
-                "^(Deleted )?(.+?) (dev (.+?) )?(lladdr (.+?))?( proxy)?( ([INCOMPLET,RAHBSDYF]+))?\$".toRegex()
+        private val parser = ("^(Deleted )?(.+?) (dev (.+?) )?(lladdr (.+?))?( router)?( proxy)?" +
+                "( ([INCOMPLET,RAHBSDYF]+))?\$").toRegex()
         private fun checkLladdrNotLoopback(lladdr: String) = if (lladdr == "00:00:00:00:00:00") "" else lladdr
 
         fun parse(line: String): IpNeighbour? {
@@ -36,13 +36,14 @@ data class IpNeighbour(val ip: String, val dev: String, val lladdr: String, val
                     .filter { it[ARP_IP_ADDRESS] == ip && it[ARP_DEVICE] == dev }
                     .map { it[ARP_HW_ADDRESS] }
                     .singleOrNull() ?: "")
-            val state = if (match.groupValues[1].isNotEmpty()) State.DELETING else when (match.groupValues[9]) {
+            val state = if (match.groupValues[1].isNotEmpty() || lladdr.isEmpty()) State.DELETING else
+                when (match.groupValues[10]) {
                     "", "INCOMPLETE" -> State.INCOMPLETE
                     "REACHABLE", "DELAY", "STALE", "PROBE", "PERMANENT" -> State.VALID
                     "FAILED" -> State.FAILED
                     "NOARP" -> return null  // skip
                     else -> {
-                    Log.w(TAG, "Unknown state encountered: ${match.groupValues[9]}")
+                        Log.w(TAG, "Unknown state encountered: ${match.groupValues[10]}")
                         return null
                     }
                 }

mobile/src/main/java/be/mygod/vpnhotspot/net/IpNeighbourMonitor.kt

@@ -58,7 +58,7 @@ class IpNeighbourMonitor private constructor() {
     init {
         thread(name = TAG + "-input") {
             // monitor may get rejected by SELinux
-            val monitor = ProcessBuilder("sh", "-c", "ip -4 monitor neigh || su -c ip -4 monitor neigh")
+            val monitor = ProcessBuilder("sh", "-c", "ip monitor neigh || su -c ip monitor neigh")
                     .redirectErrorStream(true)
                     .start()
             this.monitor = monitor
@@ -85,7 +85,7 @@ class IpNeighbourMonitor private constructor() {
     }
 
     fun flush() = thread(name = TAG + "-flush") {
-        val process = ProcessBuilder("ip", "-4", "neigh")
+        val process = ProcessBuilder("ip", "neigh")
                 .redirectErrorStream(true)
                 .start()
         process.waitFor()
@@ -94,7 +94,11 @@ class IpNeighbourMonitor private constructor() {
         process.inputStream.bufferedReader().useLines {
             synchronized(neighbours) {
                 neighbours.clear()
-                neighbours.putAll(it.map(IpNeighbour.Companion::parse).filterNotNull().associateBy { it.ip })
+                neighbours.putAll(it
+                        .map(IpNeighbour.Companion::parse)
+                        .filterNotNull()
+                        .filter { it.state != IpNeighbour.State.DELETING }  // skip entries without lladdr
+                        .associateBy { it.ip })
                 postUpdateLocked()
             }
         }

mobile/src/main/res/values-zh-rCN/strings.xml

@@ -36,9 +36,9 @@
     <string name="tethering_manage">管理…</string>
 
     <string name="connected_devices">已连接设备</string>
-    <string name="connected_state_incomplete">正在通过 %s 连接</string>
-    <string name="connected_state_valid">已连接到 %s</string>
-    <string name="connected_state_failed">已从 %s 断开</string>
+    <string name="connected_state_incomplete">%s (正在连接)</string>
+    <string name="connected_state_valid">%s (已连上)</string>
+    <string name="connected_state_failed">%s (已断开)</string>
 
     <string name="settings_service">服务</string>
     <string name="settings_service_dns">下游 DNS 服务器[:端口]</string>

mobile/src/main/res/values/strings.xml

@@ -38,9 +38,9 @@
     <string name="tethering_manage">Manage…</string>
 
     <string name="connected_devices">Connected devices</string>
-    <string name="connected_state_incomplete">Connecting to %s</string>
-    <string name="connected_state_valid">Connected to %s</string>
-    <string name="connected_state_failed">Lost from %s</string>
+    <string name="connected_state_incomplete">%s (connecting)</string>
+    <string name="connected_state_valid">%s (reachable)</string>
+    <string name="connected_state_failed">%s (lost)</string>
 
     <string name="settings_service">Service</string>
     <string name="settings_service_dns">Downstream DNS server[:port]</string>