ObjFW  Diff

	if (_host == nil)
		@throw [OFInvalidArgumentException exception];

	if (_listeningSocket != nil)
		@throw [OFAlreadyConnectedException exception];

	_listeningSocket = [[OFTCPSocket alloc] init];
	_port = [_listeningSocket bindToHost: (OFString *)_host
					port: _port];
	[_listeningSocket listen];

	[_listeningSocket asyncAcceptWithTarget: self
				       selector: @selector(of_socket:
						     didAcceptSocket:context:
						     exception:)