cURL, on Cygwin.curl http://localhost:18182/....
hangs. Forever.
Turning verbosity on with
--ascii-trace this is the output of the happy path:
* About to connect() to localhost port 18182 (#0) * Trying ::1... * Timeout * Trying 127.0.0.1... * connected * Connected to localhost (127.0.0.1) port 18182 (#0)
When it hangs, it does it when
Trying ::1...
With the little help from RawCap I noticed that the TCP stack never receives the
ACK when in SYN SENT state (see here for a picture). And cURL sometimes isn't forcibly timing out.By specifying
--connect-timeout the problem is solved.
