connect_address

        # BasicSocket.connect_address

(from ruby core)
---
    connect_address()

---

Returns an address of the socket suitable for connect in the local
machine.

This method returns *self*.local_address, except following condition.

*   IPv4 unspecified address (0.0.0.0) is replaced by IPv4 loopback
    address (127.0.0.1).
*   IPv6 unspecified address (::) is replaced by IPv6 loopback address
    (::1).


If the local address is not suitable for connect, SocketError is raised.
IPv4 and IPv6 address which port is 0 is not suitable for connect. Unix
domain socket which has no path is not suitable for connect.

    Addrinfo.tcp("0.0.0.0", 0).listen {|serv|
      p serv.connect_address #=> #<Addrinfo: 127.0.0.1:53660 TCP>
      serv.connect_address.connect {|c|
        s, _ = serv.accept
        p [c, s] #=> [#<Socket:fd 4>, #<Socket:fd 6>]
      }
    }