Sockets¶

Lists the sockets open in this session, oldest first.

$ wo 'srv = SocketOpen[0]; Sockets[] === {srv}'
True

Close takes a socket off the list, and closing a listening socket takes the connections it accepted with it:

$ wo 'srv = SocketOpen[0]; Close[srv]; Sockets[]'
{}

Close answers with the endpoint it closed, not with the socket. The port has to be read before the close: a closed socket answers no property query at all, so asking it afterwards gives $Failed.

$ wo 'srv = SocketOpen[0]; p = srv["DestinationPort"]; Close[srv] === "127.0.0.1:" <> ToString[p]'
True