RSocket How to obtain a remote IP address

[sdack-cloud]

How to obtain a remote IP address

org.springframework.boot:spring-boot-starter-rsocket:3.2.1
io.rsocket:rsocket-core:1.1.3

In the @ConnectMapping phase, I want to obtain remote IP addresses to prevent malicious attacks

I use WebSocket mode

WebsocketDuplexConnection remoteAddress() How should I obtain it

[philwebb]

Thanks for getting in touch, but it feels like this is a question that would be better suited to Stack Overflow. As mentioned in the guidelines for contributing, we prefer to use GitHub issues only for bugs and enhancements. Feel free to update this issue with a link to the re-posted question (so that
other people can find it) or add some more details if you feel this is a genuine bug.

[sdack-cloud]

I searched for answers on Stack Overflow. There are too few questions about rsocket on Stack Overflow.

There is a solution to obtain the remote IP address, but it's quite inelegant

I want to say that Spring cannot encapsulate the remote IP address. It should be exposed
@philwebb

// Source - https://stackoverflow.com/a
// Posted by spheenik
// Retrieved 2025-11-24, License - CC BY-SA 4.0

import io.rsocket.DuplexConnection;
import io.rsocket.RSocket;
import org.springframework.messaging.rsocket.RSocketRequester;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Field;
import java.net.SocketAddress;

public class RSocketUtil {

    public static DuplexConnection getConnectionFromRequester(RSocketRequester requester) {
        RSocket rsocket = requester.rsocket();
        Field connectionField = ReflectionUtils.findField(rsocket.getClass(), "connection");
        connectionField.setAccessible(true);
        return (DuplexConnection) ReflectionUtils.getField(connectionField, rsocket);
    }

    public static SocketAddress getRemoteAddressFromRequester(RSocketRequester requester) {
        DuplexConnection connection = getConnectionFromRequester(requester);
        return connection.remoteAddress();
    }

}

[bclozel]

@sdack-cloud this is more of a question for the rsocket project. I have found this in the project issue tracker: rsocket/rsocket-java#1013