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tethering: DAD Proxy Daemon

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DAD proxy daemon responsible for forwarding NS/NA between
tethered iface and upstream iface.

Change-Id: I2e58e10e7fa7dba6a6f63ad03b000549f3afc37e
This commit is contained in:
Tyler Wear
2020-03-13 11:38:38 -07:00
parent 1ed9e74716
commit 90e4063fd2
10 changed files with 818 additions and 25 deletions
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16
Tethering/src/android/net/ip/RouterAdvertisementDaemon.java
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@@ -18,6 +18,7 @@ package android.net.ip;
import static android.net.util.NetworkConstants.IPV6_MIN_MTU;
import static android.net.util.NetworkConstants.RFC7421_PREFIX_LENGTH;
import static android.net.util.TetheringUtils.getAllNodesForScopeId;
import static android.system.OsConstants.AF_INET6;
import static android.system.OsConstants.IPPROTO_ICMPV6;
import static android.system.OsConstants.SOCK_RAW;
@@ -44,7 +45,6 @@ import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
@@ -92,10 +92,6 @@ public class RouterAdvertisementDaemon {
private static final int DAY_IN_SECONDS = 86_400;
private static final byte[] ALL_NODES = new byte[] {
(byte) 0xff, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
};
private final InterfaceParams mInterface;
private final InetSocketAddress mAllNodes;
@@ -240,7 +236,6 @@ public class RouterAdvertisementDaemon {
}
}
public RouterAdvertisementDaemon(InterfaceParams ifParams) {
mInterface = ifParams;
mAllNodes = new InetSocketAddress(getAllNodesForScopeId(mInterface.index), 0);
@@ -363,15 +358,6 @@ public class RouterAdvertisementDaemon {
}
}
private static Inet6Address getAllNodesForScopeId(int scopeId) {
try {
return Inet6Address.getByAddress("ff02::1", ALL_NODES, scopeId);
} catch (UnknownHostException uhe) {
Log.wtf(TAG, "Failed to construct ff02::1 InetAddress: " + uhe);
return null;
}
}
private static byte asByte(int value) {
return (byte) value;
}