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Obtain DNS server automatically from VPN service

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Demote DNS settings to fallback usages only.
This commit is contained in:
Mygod
2018-02-17 19:52:34 -08:00
parent 2d30b5154b
commit f2d9f25b10
8 changed files with 43 additions and 32 deletions
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6
mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt
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@@ -3,6 +3,7 @@ package be.mygod.vpnhotspot.net
import android.os.Build
import be.mygod.vpnhotspot.App.Companion.app
import be.mygod.vpnhotspot.R
import be.mygod.vpnhotspot.debugLog
import be.mygod.vpnhotspot.noisySu
import java.io.IOException
import java.net.Inet4Address
@@ -82,8 +83,11 @@ class Routing(val upstream: String?, val downstream: String, ownerAddress: InetA
return this
}
fun dnsRedirect(dns: String): Routing {
fun dnsRedirect(dnses: List<InetAddress>): Routing {
val hostAddress = hostAddress.hostAddress
val dns = dnses.firstOrNull { it is Inet4Address }?.hostAddress
?: app.pref.getString("service.dns", "8.8.8.8")
debugLog("Routing", "Using $dns from ($dnses)")
startScript.add("$IPTABLES -t nat -A PREROUTING -i $downstream -p tcp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
startScript.add("$IPTABLES -t nat -A PREROUTING -i $downstream -p udp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
stopScript.addFirst("$IPTABLES -t nat -D PREROUTING -i $downstream -p tcp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")