Merge "Add length option into ICMP packets"
diff --git a/service/src/com/android/server/connectivity/NetworkDiagnostics.java b/service/src/com/android/server/connectivity/NetworkDiagnostics.java
index 3f7b64d..4eba74b 100644
--- a/service/src/com/android/server/connectivity/NetworkDiagnostics.java
+++ b/service/src/com/android/server/connectivity/NetworkDiagnostics.java
@@ -18,6 +18,8 @@
import static android.system.OsConstants.*;
+import static com.android.net.module.util.NetworkStackConstants.ICMP_HEADER_LEN;
+
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.net.InetAddresses;
@@ -264,7 +266,7 @@
private void prepareIcmpMeasurement(InetAddress target) {
if (!mIcmpChecks.containsKey(target)) {
Measurement measurement = new Measurement();
- measurement.thread = new Thread(new IcmpCheck(target, measurement));
+ measurement.thread = new Thread(new IcmpCheck(target, 0, measurement));
mIcmpChecks.put(target, measurement);
}
}
@@ -276,7 +278,7 @@
Pair<InetAddress, InetAddress> srcTarget = new Pair<>(source, target);
if (!mExplicitSourceIcmpChecks.containsKey(srcTarget)) {
Measurement measurement = new Measurement();
- measurement.thread = new Thread(new IcmpCheck(source, target, measurement));
+ measurement.thread = new Thread(new IcmpCheck(source, target, 0, measurement));
mExplicitSourceIcmpChecks.put(srcTarget, measurement);
}
}
@@ -489,8 +491,11 @@
private static final int PACKET_BUFSIZE = 512;
private final int mProtocol;
private final int mIcmpType;
+ private final int mPayloadSize;
+ // The length parameter is effectively the -s flag to ping/ping6 to specify the number of
+ // data bytes to be sent.
+ IcmpCheck(InetAddress source, InetAddress target, int length, Measurement measurement) {
- IcmpCheck(InetAddress source, InetAddress target, Measurement measurement) {
super(source, target, measurement);
if (mAddressFamily == AF_INET6) {
@@ -502,12 +507,13 @@
mIcmpType = NetworkConstants.ICMPV4_ECHO_REQUEST_TYPE;
mMeasurement.description = "ICMPv4";
}
-
- mMeasurement.description += " dst{" + mTarget.getHostAddress() + "}";
+ mPayloadSize = length;
+ mMeasurement.description += " payloadLength{" + mPayloadSize + "}"
+ + " dst{" + mTarget.getHostAddress() + "}";
}
- IcmpCheck(InetAddress target, Measurement measurement) {
- this(null, target, measurement);
+ IcmpCheck(InetAddress target, int length, Measurement measurement) {
+ this(null, target, length, measurement);
}
@Override
@@ -523,9 +529,11 @@
mMeasurement.description += " src{" + socketAddressToString(mSocketAddress) + "}";
// Build a trivial ICMP packet.
- final byte[] icmpPacket = {
- (byte) mIcmpType, 0, 0, 0, 0, 0, 0, 0 // ICMP header
- };
+ // The v4 ICMP header ICMP_HEADER_LEN (which is 8) and v6 is only 4 bytes (4 bytes
+ // message body followed by header before the payload).
+ // Use 8 bytes for both v4 and v6 for simplicity.
+ final byte[] icmpPacket = new byte[ICMP_HEADER_LEN + mPayloadSize];
+ icmpPacket[0] = (byte) mIcmpType;
int count = 0;
mMeasurement.startTime = now();