Fix potential exceptions in FdEventReader users am: a51a28854f (91ee1dfc) · Commits · e / os / android_packages_modules_NetworkStack

common/moduleutils/src/android/net/ip/NetlinkMonitor.java

+17 −13

Original line number	Diff line number	Diff line
		@@ -106,6 +106,7 @@ public class NetlinkMonitor extends PacketReader {
		byteBuffer.order(ByteOrder.nativeOrder());

		while (byteBuffer.remaining() > 0) {
		try {
		final int position = byteBuffer.position();
		final NetlinkMessage nlMsg = NetlinkMessage.parse(byteBuffer);
		if (nlMsg == null \|\| nlMsg.getHeader() == null) {
		@@ -120,6 +121,9 @@ public class NetlinkMonitor extends PacketReader {
		}

		processNetlinkMessage(nlMsg, whenMs);
		} catch (Throwable e) {
		mLog.e("Error handling netlink message", e);
		}
		}
		}

common/moduleutils/src/android/net/util/FdEventsReader.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -24,6 +24,7 @@ import android.os.Looper;
		import android.os.MessageQueue;
		import android.system.ErrnoException;
		import android.system.OsConstants;
		import android.util.Log;

		import androidx.annotation.NonNull;
		import androidx.annotation.Nullable;
		@@ -244,6 +245,7 @@ public abstract class FdEventsReader<BufferType> {
		handlePacket(mBuffer, bytesRead);
		} catch (Exception e) {
		logError("handlePacket error: ", e);
		Log.wtf(FdEventsReader.class.getSimpleName(), "Error handling packet: stopping", e);
		break;
		}
		}

src/android/net/dhcp/DhcpPacketListener.java

+3 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ package android.net.dhcp;
		import android.net.util.FdEventsReader;
		import android.os.Handler;
		import android.system.Os;
		import android.util.Log;

		import androidx.annotation.NonNull;
		import androidx.annotation.Nullable;
		@@ -59,6 +60,8 @@ abstract class DhcpPacketListener extends FdEventsReader<DhcpPacketListener.Payl
		onReceive(packet, recvbuf.mSrcAddr, recvbuf.mSrcPort);
		} catch (DhcpPacket.ParseException e) {
		logParseError(recvbuf.mBytes, length, e);
		} catch (Throwable e) {
		Log.wtf(DhcpPacketListener.class.getSimpleName(), "Error handling DHCP packet", e);
		}
		}

src/android/net/ip/ConnectivityPacketTracker.java

+8 −3

Original line number	Diff line number	Diff line
		@@ -133,9 +133,14 @@ public class ConnectivityPacketTracker {
		return;
		}

		final String summary = ConnectivityPacketSummary.summarize(
		mInterface.macAddr, recvbuf, length);
		final String summary;
		try {
		summary = ConnectivityPacketSummary.summarize(mInterface.macAddr, recvbuf, length);
		if (summary == null) return;
		} catch (Exception e) {
		if (DBG) Log.d(mTag, "Error creating packet summary", e);
		return;
		}

		if (DBG) Log.d(mTag, summary);
		addLogEntry(summary + "\n[" + HexDump.toHexString(recvbuf, 0, length) + "]");

src/android/net/ip/IpReachabilityMonitor.java

+12 −3

Original line number	Diff line number	Diff line
		@@ -341,7 +341,14 @@ public class IpReachabilityMonitor {
		// TODO: Consider using NeighborEvent#isValid() here; it's more
		// strict but may interact badly if other entries are somehow in
		// NUD_INCOMPLETE (say, during network attach).
		if (entry.getValue().nudState != StructNdMsg.NUD_FAILED) continue;
		final NeighborEvent val = entry.getValue();

		// Find all the neighbors that have gone into FAILED state.
		// Ignore entries for which we have never received an event. If there are neighbors
		// that never respond to ARP/ND, the kernel will send several FAILED event, then
		// an INCOMPLETE event, and then more FAILED events. The INCOMPLETE event will
		// populate the map and the subsequent FAILED event will be processed.
		if (val == null \|\| val.nudState != StructNdMsg.NUD_FAILED) continue;

		ip = entry.getKey();
		for (RouteInfo route : mLinkProperties.getRoutes()) {
		@@ -378,10 +385,12 @@ public class IpReachabilityMonitor {
		Log.d(TAG, "neighbour IPv4(v6): " + entry.getKey() + " neighbour state: "
		+ StructNdMsg.stringForNudState(entry.getValue().nudState));
		}
		if (entry.getValue().nudState != StructNdMsg.NUD_REACHABLE) return;
		final NeighborEvent val = entry.getValue();
		// If an entry is null, consider that probing for that neighbour has completed.
		if (val == null \|\| val.nudState != StructNdMsg.NUD_REACHABLE) return;
		}

		// All neighbours in the watchlist are in REACHABLE state and connection is stable,
		// Probing for all neighbours in the watchlist is complete and the connection is stable,
		// restore NUD probe parameters to steadystate value. In the case where neighbours
		// are responsive, this code will run before the wakelock expires.
		setNeighbourParametersForSteadyState();