DBus message sender

[nicomuns]

Hello

My use case is the following, I have one systemd service acting as a DBus server, exposing a DBus method that will be called by several clients (also systemd services). I need to know which client called the method, so I used getObject().getCurrentlyProcessedMessage().getSender().
This gives me the unique identifier of the sender (:1.217 for example) but I don't know how to link it to my systemd services, I have no idea who :1.217 is. Is there any solution to this?

I'm using sdbus-cpp v1.17

DBus method:

void MyClass::myMethod(const std::string& arg0, const std::string& arg1, int32_t arg2) {
    const char* sender = getObject().getCurrentlyProcessedMessage().getSender();
    std::cout << "Sender of this method call: " << sender << std::endl;

    // ...
}

DBus server log example:
[21-04-2026 17:23:28.529] [myService] [info] [myFile.cpp:121] Sender of this method call: :1.217

Monitoring:

sudo busctl monitor Service
‣ Type=method_call  Endian=l  Flags=4  Version=1 Cookie=2  Timestamp="Tue 2026-04-21 15:23:28.529481 UTC"
  Sender=:1.217  Destination=Service  Path=ObjectPath  Interface=Interface  Member=Method
  UniqueName=:1.217
  MESSAGE "ssi" {
          STRING "";
          STRING "";
          INT32 0;
  };

Thank you