LineageOS/android_packages_modules_Connectivity
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Merge "Add a helper function to send RTM_NEWADDR netlink message to kernel."

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Treehugger Robot
2023-06-01 08:52:02 +00:00
committed by Gerrit Code Review
parent eb1fe093ad a6fba08f82
commit cae8499e3d
1 changed files with 28 additions and 0 deletions
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28
staticlibs/device/com/android/net/module/util/netlink/NetlinkUtils.java
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@@ -22,6 +22,7 @@ import static android.system.OsConstants.EIO;
import static android.system.OsConstants.EPROTO;
import static android.system.OsConstants.ETIMEDOUT;
import static android.system.OsConstants.NETLINK_INET_DIAG;
import static android.system.OsConstants.NETLINK_ROUTE;
import static android.system.OsConstants.SOCK_CLOEXEC;
import static android.system.OsConstants.SOCK_DGRAM;
import static android.system.OsConstants.SOL_SOCKET;
@@ -41,9 +42,11 @@ import androidx.annotation.Nullable;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.net.Inet6Address;
import java.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Objects;
/**
* Utilities for netlink related class that may not be able to fit into a specific class.
@@ -167,6 +170,31 @@ public class NetlinkUtils {
}
}
/**
* Send an RTM_NEWADDR message to kernel to add or update an IPv6 address.
*
* @param ifIndex interface index.
* @param ip IPv6 address to be added.
* @param prefixlen IPv6 address prefix length.
* @param flags IPv6 address flags.
* @param scope IPv6 address scope.
* @param preferred The preferred lifetime of IPv6 address.
* @param valid The valid lifetime of IPv6 address.
*/
public static boolean sendRtmNewAddressRequest(int ifIndex, @NonNull final Inet6Address ip,
short prefixlen, int flags, byte scope, long preferred, long valid) {
Objects.requireNonNull(ip, "IPv6 address to be added should not be null.");
final byte[] msg = RtNetlinkAddressMessage.newRtmNewAddressMessage(1 /* seqNo*/, ip,
prefixlen, flags, scope, ifIndex, preferred, valid);
try {
NetlinkUtils.sendOneShotKernelMessage(NETLINK_ROUTE, msg);
return true;
} catch (ErrnoException e) {
Log.e(TAG, "Fail to send RTM_NEWADDR to add " + ip.getHostAddress(), e);
return false;
}
}
/**
* Create netlink socket with the given netlink protocol type.
*