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Ignore Ipv6 #1

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8bcde90
Ignore Ipv6
aditya-agarwal-groww Feb 10, 2025
8d9a245
Renamed Vars
aditya-agarwal-groww Feb 12, 2025
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45 changes: 40 additions & 5 deletions src/main/java/io/nats/client/impl/SocketDataPort.java
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Original file line number Diff line number Diff line change
Expand Up @@ -23,12 +23,14 @@
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketException;
import java.net.URISyntaxException;
import java.net.*;
import java.time.Duration;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;

import static io.nats.client.support.NatsConstants.SECURE_WEBSOCKET_PROTOCOL;
Expand Down Expand Up @@ -81,7 +83,7 @@ public void connect(NatsConnection conn, NatsUri nuri, long timeoutNanos) throws
socket.setTcpNoDelay(true);
socket.setReceiveBufferSize(2 * 1024 * 1024);
socket.setSendBufferSize(2 * 1024 * 1024);
socket.connect(new InetSocketAddress(host, port), (int) timeout);
socket.connect(new InetSocketAddress(getIpV4Addresses(nuri).get(0).getHost(), port), (int) timeout);
if (soLinger > -1) {
socket.setSoLinger(true, soLinger);
}
Expand Down Expand Up @@ -113,6 +115,39 @@ public void connect(NatsConnection conn, NatsUri nuri, long timeoutNanos) throws
}
}

private List<NatsUri> getIpV4Addresses(NatsUri nuri) {
if (nuri.hostIsIpAddress()) {
return Arrays.asList(nuri);
}
try {
InetAddress[] addresses = InetAddress.getAllByName(nuri.getHost());
return filterIpv6Address(Arrays.asList(addresses), nuri);
} catch (UnknownHostException e) {
System.out.println(String.format("[WARN] Ignoring Address %s as Error in resolving host: %s", nuri.getHost(), e.getMessage()));
}
return Arrays.asList(nuri);
}


private List<NatsUri> filterIpv6Address(List<InetAddress> inetAddresses, NatsUri nuri) {
List<NatsUri> natsUris = new ArrayList<>();
for (InetAddress addr : inetAddresses) {
try {
if (addr instanceof Inet6Address) {
continue;
}
natsUris.add(nuri.reHost(addr.getHostAddress()));
} catch (URISyntaxException e) {
System.out.println(String.format("[WARN] Ignoring Address %s as Error in while rehostToNri: %s", nuri.getHost(), e.getMessage()));
}
}
if (natsUris.size() < 1) {
natsUris.add(nuri);
}
Collections.shuffle(natsUris, ThreadLocalRandom.current());
return natsUris;
}

/**
* Upgrade the port to SSL. If it is already secured, this is a no-op.
* If the data port type doesn't support SSL it should throw an exception.
Expand Down