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-rw-r--r--src/android/net/apf/ApfFilter.java3
-rw-r--r--src/android/net/dhcp/DhcpClient.java3
-rw-r--r--src/android/net/dhcp/DhcpServer.java3
-rw-r--r--src/android/net/ip/ConnectivityPacketTracker.java4
-rw-r--r--src/android/net/util/NetworkStackUtils.java41
5 files changed, 47 insertions, 7 deletions
diff --git a/src/android/net/apf/ApfFilter.java b/src/android/net/apf/ApfFilter.java
index d2f3259..663e2f1 100644
--- a/src/android/net/apf/ApfFilter.java
+++ b/src/android/net/apf/ApfFilter.java
@@ -49,7 +49,6 @@ import android.net.metrics.IpConnectivityLog;
import android.net.metrics.RaEvent;
import android.net.util.InterfaceParams;
import android.net.util.NetworkStackUtils;
-import android.net.util.SocketUtils;
import android.os.PowerManager;
import android.os.SystemClock;
import android.system.ErrnoException;
@@ -478,7 +477,7 @@ public class ApfFilter {
SocketAddress addr = makePacketSocketAddress(
(short) ETH_P_IPV6, mInterfaceParams.index);
Os.bind(socket, addr);
- SocketUtils.attachRaFilter(socket, mApfCapabilities.apfPacketFormat);
+ NetworkStackUtils.attachRaFilter(socket, mApfCapabilities.apfPacketFormat);
} catch(SocketException|ErrnoException e) {
Log.e(TAG, "Error starting filter", e);
return;
diff --git a/src/android/net/dhcp/DhcpClient.java b/src/android/net/dhcp/DhcpClient.java
index 79d6a55..64adc0d 100644
--- a/src/android/net/dhcp/DhcpClient.java
+++ b/src/android/net/dhcp/DhcpClient.java
@@ -51,6 +51,7 @@ import android.net.metrics.DhcpClientEvent;
import android.net.metrics.DhcpErrorEvent;
import android.net.metrics.IpConnectivityLog;
import android.net.util.InterfaceParams;
+import android.net.util.NetworkStackUtils;
import android.net.util.SocketUtils;
import android.os.Message;
import android.os.SystemClock;
@@ -319,7 +320,7 @@ public class DhcpClient extends StateMachine {
mPacketSock = Os.socket(AF_PACKET, SOCK_RAW, ETH_P_IP);
SocketAddress addr = makePacketSocketAddress((short) ETH_P_IP, mIface.index);
Os.bind(mPacketSock, addr);
- SocketUtils.attachDhcpFilter(mPacketSock);
+ NetworkStackUtils.attachDhcpFilter(mPacketSock);
} catch(SocketException|ErrnoException e) {
Log.e(TAG, "Error creating packet socket", e);
return false;
diff --git a/src/android/net/dhcp/DhcpServer.java b/src/android/net/dhcp/DhcpServer.java
index cd993e9..8832eaa 100644
--- a/src/android/net/dhcp/DhcpServer.java
+++ b/src/android/net/dhcp/DhcpServer.java
@@ -45,6 +45,7 @@ import android.annotation.Nullable;
import android.net.INetworkStackStatusCallback;
import android.net.MacAddress;
import android.net.TrafficStats;
+import android.net.util.NetworkStackUtils;
import android.net.util.SharedLog;
import android.net.util.SocketUtils;
import android.os.Handler;
@@ -207,7 +208,7 @@ public class DhcpServer extends IDhcpServer.Stub {
@Override
public void addArpEntry(@NonNull Inet4Address ipv4Addr, @NonNull MacAddress ethAddr,
@NonNull String ifname, @NonNull FileDescriptor fd) throws IOException {
- SocketUtils.addArpEntry(ipv4Addr, ethAddr, ifname, fd);
+ NetworkStackUtils.addArpEntry(ipv4Addr, ethAddr, ifname, fd);
}
@Override
diff --git a/src/android/net/ip/ConnectivityPacketTracker.java b/src/android/net/ip/ConnectivityPacketTracker.java
index de54824..eb49218 100644
--- a/src/android/net/ip/ConnectivityPacketTracker.java
+++ b/src/android/net/ip/ConnectivityPacketTracker.java
@@ -25,8 +25,8 @@ import static android.system.OsConstants.SOCK_RAW;
import android.net.util.ConnectivityPacketSummary;
import android.net.util.InterfaceParams;
+import android.net.util.NetworkStackUtils;
import android.net.util.PacketReader;
-import android.net.util.SocketUtils;
import android.os.Handler;
import android.system.ErrnoException;
import android.system.Os;
@@ -103,7 +103,7 @@ public class ConnectivityPacketTracker {
FileDescriptor s = null;
try {
s = Os.socket(AF_PACKET, SOCK_RAW | SOCK_NONBLOCK, 0);
- SocketUtils.attachControlPacketFilter(s, ARPHRD_ETHER);
+ NetworkStackUtils.attachControlPacketFilter(s, ARPHRD_ETHER);
Os.bind(s, makePacketSocketAddress((short) ETH_P_ALL, mInterface.index));
} catch (ErrnoException | IOException e) {
logError("Failed to create packet tracking socket: ", e);
diff --git a/src/android/net/util/NetworkStackUtils.java b/src/android/net/util/NetworkStackUtils.java
index 9d2df57..dada61c 100644
--- a/src/android/net/util/NetworkStackUtils.java
+++ b/src/android/net/util/NetworkStackUtils.java
@@ -23,14 +23,18 @@ import android.util.SparseArray;
import java.io.FileDescriptor;
import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.SocketException;
import java.util.List;
import java.util.function.Predicate;
-
/**
* Collection of utilities for the network stack.
*/
public class NetworkStackUtils {
+ static {
+ System.loadLibrary("networkstackutilsjni");
+ }
/**
* @return True if the array is null or 0-length.
@@ -98,4 +102,39 @@ public class NetworkStackUtils {
String value = DeviceConfig.getProperty(namespace, name);
return value != null ? value : defaultValue;
}
+
+ /**
+ * Attaches a socket filter that accepts DHCP packets to the given socket.
+ */
+ public static native void attachDhcpFilter(FileDescriptor fd) throws SocketException;
+
+ /**
+ * Attaches a socket filter that accepts ICMPv6 router advertisements to the given socket.
+ * @param fd the socket's {@link FileDescriptor}.
+ * @param packetType the hardware address type, one of ARPHRD_*.
+ */
+ public static native void attachRaFilter(FileDescriptor fd, int packetType)
+ throws SocketException;
+
+ /**
+ * Attaches a socket filter that accepts L2-L4 signaling traffic required for IP connectivity.
+ *
+ * This includes: all ARP, ICMPv6 RS/RA/NS/NA messages, and DHCPv4 exchanges.
+ *
+ * @param fd the socket's {@link FileDescriptor}.
+ * @param packetType the hardware address type, one of ARPHRD_*.
+ */
+ public static native void attachControlPacketFilter(FileDescriptor fd, int packetType)
+ throws SocketException;
+
+ /**
+ * Add an entry into the ARP cache.
+ */
+ public static void addArpEntry(Inet4Address ipv4Addr, android.net.MacAddress ethAddr,
+ String ifname, FileDescriptor fd) throws IOException {
+ addArpEntry(ethAddr.toByteArray(), ipv4Addr.getAddress(), ifname, fd);
+ }
+
+ private static native void addArpEntry(byte[] ethAddr, byte[] netAddr, String ifname,
+ FileDescriptor fd) throws IOException;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-03 17:59:10 +0000