Bugs item #1891355, was opened at 2008-02-11 19:34
Message generated for change (Settings changed) made by bagder
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Category: debug/info output
Group: wrong behaviour
>Status: Pending
Resolution: None
Priority: 3
Private: No
Submitted By: Patrick_ (patrick_)
Assigned to: Daniel Stenberg (bagder)
Summary: Progress callback not called during failed socket connect

Initial Comment:
When attempting to connect to my FTP server, giving libcurl the wrong port (i.e port 219 instead of 21), the progress function is not called during the connection attempt. This is with curl 7.18.0.

Problem appears to be in lib/connect.c, in Curl_connecthost() and/or singleipconnect(). I have absolutely no experience with networking functions except using libcurl, but I added a pgrsUpdate() call in Curl_connecthost() after the singleipconnect() function is called. This has the progress callback called, but only after the blocking singleipconnect() function returns.

I'll keep trial-and-erroring to see if I can fix this, but quickly looking at the singleipconnect() function and it's blocking standard library calls, I'm not even sure there's a possible fix for this.

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Comment By: Daniel Stenberg (bagder)
Date: 2008-02-11 21:18

Message:
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First, the progress callback is generally rather pointless for the multi
interface since then you can get all this info already by yourself and you
can do all sorts of things between the invokes of curl_multi_* etc.

Then, libcurl is using non-blocking sockets so the only really blocking
thing in a connect that you may see is the name resolving, and that's
non-blocking if you built with c-ares or on Windows.

Doesn't it make sense to add a call to pgrsUpdate() in the
lib/connect.c:Curl_is_connected() function ?

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You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=100976&aid=1891355&group_id=976
Received on 2008-02-18