LineageOS/android_packages_modules_Connectivity
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[CLATJ#11] ClatCoordinator: config tun interface and bring up

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Apply mtu and selected IPv4 address to tun interface.
Then, bring up the tun interface.

Bug: 212345928
Test: flash and boot
Run "atest ClatCoordinatorTest" in a followup commit.

Change-Id: I24a2a91e2b084be28820a7a63b265c5f56293334
This commit is contained in:
Hungming Chen
2021-12-25 20:18:02 +08:00
parent 7de1c49b74
commit 397ca65abb
1 changed files with 23 additions and 0 deletions
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23
service/src/com/android/server/connectivity/ClatCoordinator.java
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@@ -16,6 +16,7 @@
package com.android.server.connectivity;
import static android.net.INetd.IF_STATE_UP;
import static android.net.INetd.PERMISSION_SYSTEM;
import static com.android.net.module.util.NetworkStackConstants.IPV6_MIN_MTU;
@@ -23,6 +24,7 @@ import static com.android.net.module.util.NetworkStackConstants.IPV6_MIN_MTU;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.net.INetd;
import android.net.InterfaceConfigurationParcel;
import android.net.IpPrefix;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
@@ -198,6 +200,27 @@ public class ClatCoordinator {
final int mtu = adjustMtu(detectedMtu);
Log.i(TAG, "ipv4 mtu is " + mtu);
// TODO: add setIptablesDropRule
// Config tun interface mtu, address and bring up.
try {
mNetd.interfaceSetMtu(tunIface, mtu);
} catch (RemoteException | ServiceSpecificException e) {
throw new IOException("Set MTU " + mtu + " on " + tunIface + " failed: " + e);
}
final InterfaceConfigurationParcel ifConfig = new InterfaceConfigurationParcel();
ifConfig.ifName = tunIface;
ifConfig.ipv4Addr = v4;
ifConfig.prefixLength = 32;
ifConfig.hwAddr = "";
ifConfig.flags = new String[] {IF_STATE_UP};
try {
mNetd.interfaceSetCfg(ifConfig);
} catch (RemoteException | ServiceSpecificException e) {
throw new IOException("Setting IPv4 address to " + ifConfig.ipv4Addr + "/"
+ ifConfig.prefixLength + " failed on " + ifConfig.ifName + ": " + e);
}
// TODO: start clatd and returns local xlat464 v6 address.
return null;
}