Refrain from using reflection to parse numerical address

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

@@ -33,8 +33,8 @@ data class IpNeighbour(val ip: InetAddress, val dev: String, val lladdr: String,
         fun parse(line: String): List<IpNeighbour> {
             return try {
                 val match = parser.matchEntire(line)!!
-                val ip = parseNumericAddress(match.groupValues[2])  // by regex, ip is non-empty
-                val dev = match.groupValues[3]                      // by regex, dev is non-empty as well
+                val ip = parseNumericAddress(match.groupValues[2])!!    // by regex, ip is non-empty
+                val dev = match.groupValues[3]                          // by regex, dev is non-empty as well
                 var lladdr = checkLladdrNotLoopback(match.groupValues[5])
                 // use ARP as fallback
                 if (lladdr.isEmpty()) lladdr = checkLladdrNotLoopback(arp()

mobile/src/main/java/be/mygod/vpnhotspot/net/monitor/TrafficRecorder.kt

@@ -80,7 +80,7 @@ object TrafficRecorder {
                         val isReceive = columns[7] == ANYWHERE
                         val isSend = columns[8] == ANYWHERE
                         check(isReceive != isSend)  // this check might fail when the user performed an upgrade from 1.x
-                        val ip = parseNumericAddress(columns[if (isReceive) 8 else 7])
+                        val ip = parseNumericAddress(columns[if (isReceive) 8 else 7])!!
                         val downstream = columns[if (isReceive) 6 else 5]
                         val key = Pair(ip, downstream)
                         val oldRecord = records[key] ?: continue@loop   // assuming they're legacy old rules

mobile/src/main/java/be/mygod/vpnhotspot/util/Utils.kt

@@ -2,6 +2,8 @@ package be.mygod.vpnhotspot.util
 
 import android.content.*
 import android.os.Build
+import android.system.Os
+import android.system.OsConstants
 import android.view.View
 import android.widget.ImageView
 import androidx.annotation.DrawableRes
@@ -52,12 +54,8 @@ fun NetworkInterface.formatAddresses() =
                 }))
                 .joinToString("\n")
 
-private val parseNumericAddress by lazy {
-    InetAddress::class.java.getDeclaredMethod("parseNumericAddress", String::class.java).apply {
-        isAccessible = true
-    }
-}
-fun parseNumericAddress(address: String) = parseNumericAddress.invoke(null, address) as InetAddress
+fun parseNumericAddress(address: String?): InetAddress? =
+        Os.inet_pton(OsConstants.AF_INET, address) ?: Os.inet_pton(OsConstants.AF_INET6, address)
 
 fun Context.stopAndUnbind(connection: ServiceConnection) {
     connection.onServiceDisconnected(null)