Returns a network-specific string identifying the connection being used by the given player. If the programmer is not a wizard and not <player>, then E_PERM is raised. If <player> is not currently connected, then E_INVARG is raised.
For the TCP/IP networking configurations, for in-bound connections, the string has the form
"port <lport> from <host>, port <port>"
where <lport> is the listening port on which the connection arrived, <host> is either the name or decimal TCP address of the host to which the connection was opened, and <port> is the decimal TCP port of the connection on that host.
For the System V 'local' networking configuration, the string is the UNIX login name of the connecting user or, if no such name can be found, something of the form
"User <#number>"
where <#number> is a UNIX numeric user ID.
For the other networking configurations, the string is the same for all connections and, thus, useless.