brianhansonxyz/vpnhotspotmod
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Fix iptables -w <seconds> isn't available on Android 5-7

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Error message: Bad argument `1'

Fixes #2.
This commit is contained in:
Mygod
2018-01-18 20:18:06 -08:00
parent f4332b9a57
commit 656581f943
1 changed files with 23 additions and 15 deletions
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38
mobile/src/main/java/be/mygod/vpnhotspot/Routing.kt
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@@ -1,5 +1,6 @@
package be.mygod.vpnhotspot
import android.os.Build
import be.mygod.vpnhotspot.App.Companion.app
import java.io.IOException
import java.net.Inet4Address
@@ -9,11 +10,18 @@ import java.util.*
class Routing(private val upstream: String, val downstream: String, ownerAddress: InetAddress? = null) {
companion object {
/**
* -w <seconds> is not supported on 7.1-.
*
* Source: https://android.googlesource.com/platform/external/iptables/+/android-5.0.0_r1/iptables/iptables.c#1574
*/
private val IPTABLES = if (Build.VERSION.SDK_INT >= 26) "iptables -w 1" else "iptables -w"
fun clean() = noisySu(
"iptables -w 1 -t nat -F PREROUTING",
"quiet while iptables -w 1 -D FORWARD -j vpnhotspot_fwd; do done",
"iptables -w 1 -F vpnhotspot_fwd",
"iptables -w 1 -X vpnhotspot_fwd",
"$IPTABLES -t nat -F PREROUTING",
"quiet while $IPTABLES -D FORWARD -j vpnhotspot_fwd; do done",
"$IPTABLES -F vpnhotspot_fwd",
"$IPTABLES -X vpnhotspot_fwd",
"quiet while ip rule del priority 17900; do done")
}
@@ -46,22 +54,22 @@ class Routing(private val upstream: String, val downstream: String, ownerAddress
}
fun forward(): Routing {
startScript.add("quiet iptables -w 1 -N vpnhotspot_fwd 2>/dev/null")
startScript.add("iptables -w 1 -A vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT")
startScript.add("iptables -w 1 -A vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT")
startScript.add("iptables -w 1 -I FORWARD -j vpnhotspot_fwd")
stopScript.addFirst("iptables -w 1 -D vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT")
stopScript.addFirst("iptables -w 1 -D vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT")
stopScript.addFirst("iptables -w 1 -D FORWARD -j vpnhotspot_fwd")
startScript.add("quiet $IPTABLES -N vpnhotspot_fwd 2>/dev/null")
startScript.add("$IPTABLES -A vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT")
startScript.add("$IPTABLES -A vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT")
startScript.add("$IPTABLES -I FORWARD -j vpnhotspot_fwd")
stopScript.addFirst("$IPTABLES -D vpnhotspot_fwd -i $upstream -o $downstream -m state --state ESTABLISHED,RELATED -j ACCEPT")
stopScript.addFirst("$IPTABLES -D vpnhotspot_fwd -i $downstream -o $upstream -j ACCEPT")
stopScript.addFirst("$IPTABLES -D FORWARD -j vpnhotspot_fwd")
return this
}
fun dnsRedirect(dns: String): Routing {
val hostAddress = hostAddress.hostAddress
startScript.add("iptables -w 1 -t nat -A PREROUTING -i $downstream -p tcp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
startScript.add("iptables -w 1 -t nat -A PREROUTING -i $downstream -p udp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
stopScript.addFirst("iptables -w 1 -t nat -D PREROUTING -i $downstream -p tcp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
stopScript.addFirst("iptables -w 1 -t nat -D PREROUTING -i $downstream -p udp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
startScript.add("$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 $dns")
stopScript.addFirst("$IPTABLES -t nat -D PREROUTING -i $downstream -p udp -d $hostAddress --dport 53 -j DNAT --to-destination $dns")
return this
}