return nil, wrapErr(err)
			}
		}
	}

	// Proxy setup.
	switch {
	case cm.proxyURL == nil:
		// Do nothing. Not using a proxy.
	case cm.proxyURL.Scheme == "socks5" || cm.proxyURL.Scheme == "socks5h":
		conn := pconn.conn
		d := socksNewDialer("tcp", conn.RemoteAddr().String())
		if u := cm.proxyURL.User; u != nil {
			auth := &socksUsernamePassword{
				Username: u.Username(),
			}