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Merge "Add length option into ICMP packets"

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This commit is contained in:
Maciej Żenczykowski 2023-04-29 19:26:08 +00:00 • committed by Gerrit Code Review
commit 441a32e39d
1 changed files with 18 additions and 10 deletions
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28
service/src/com/android/server/connectivity/NetworkDiagnostics.java
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@ -18,6 +18,8 @@ package com.android.server.connectivity;
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 @@ public class NetworkDiagnostics {
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 @@ public class NetworkDiagnostics {
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 @@ public class NetworkDiagnostics {
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 @@ public class NetworkDiagnostics {
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 @@ public class NetworkDiagnostics {
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();