IPv6 issue with Zmq Router?

[4LB3R70D]

Hello there!

first of all, thanks for this software! I am adding here an issue because I am using this library in my project and I am having an error at the time of using IPv6. It could be that maybe I am doing something wrong, and if so, it's good to know how to do it right.

The version I am using of this library is: v4.1.0, and what I am doing is the following:

serverAddress := "tcp://*:" + strconv.Itoa(ctx.Cnfg.Networkorking.MQ.Port)

if newZmqRouter, err = zmq.NewRouter(serverAddress); err == nil {
		if ctx.Cnfg.Networkorking.MQ.IPv6{
			newZmqRouter.SetIpv6(1)
		} 
		if newZmqPoller, err := zmq.NewPoller(newZmqRouter); err == nil {
                    ...[more code]
                }
}

The expected result should be to open the port in IPv6 when 'ctx.Cnfg.Networkorking.MQ.IPv6' = true, but it is always using IPv4.
It's funny because if you call 'Ipv6() ' (https://pkg.go.dev/gopkg.in/zeromq/goczmq.v4@v4.1.0#Sock.Ipv6) right after doing the set, the value is the one that you added it.

Just to add you more context, I am using Go 1.19 in a Linux machine (Ubuntu 22.04.1 LTS)

So anyone that can help me here in knowing if this is a real issue, or it is just my bad understanding about how to use the library; will be more than welcome

thanks again in advance!

best regards,

Alberto