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| author | Daniel Stenberg <daniel@haxx.se> | 2009-02-23 21:21:00 +0000 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2009-02-23 21:21:00 +0000 |
| commit | 2afb88e2ce8dc5e1174bd7e79d41274724626dd0 (patch) | |
| tree | 5fd3abaf61c03c2018a04538691cf1b3747295e1 /docs/FAQ | |
| parent | 6c9f37d263593bd72759cc2c0d275a3a9cd47b19 (diff) | |
| download | curl-2afb88e2ce8dc5e1174bd7e79d41274724626dd0.tar.gz | |
4.17 Non-functional connect timeouts
Diffstat (limited to 'docs/FAQ')
| -rw-r--r-- | docs/FAQ | 22 |
1 files changed, 20 insertions, 2 deletions
@@ -1,4 +1,4 @@ -Updated: Jan 14, 2009 (http://curl.haxx.se/docs/faq.html) +Updated: Feb 23, 2009 (http://curl.haxx.se/docs/faq.html) _ _ ____ _ ___| | | | _ \| | / __| | | | |_) | | @@ -71,6 +71,7 @@ FAQ 4.14 Redirects work in browser but not with curl! 4.15 FTPS doesn't work 4.16 My HTTP POST or PUT requests are slow! + 4.17 Non-functional connect timeouts on Windows 5. libcurl Issues 5.1 Is libcurl thread-safe? @@ -885,6 +886,23 @@ FAQ You can disable libcurl's use of the Expect: header the same way you disable any header, using -H / CURLOPT_HTTPHEADER, or by forcing it to use HTTP 1.0. + 4.17 Non-functional connect timeouts + + In most Windows setups having a timeout longer than 21 seconds make no + difference, as it will only send 3 TCP SYN packets and no more. The second + packet sent three seconds after the first and the third six seconds after + the second. No more than three packets are sent, no matter how long the + timeout is set. + + See option TcpMaxConnectRetransmissions on this page: + http://support.microsoft.com/?scid=kb%3Ben-us%3B175523&x=6&y=7 + + Also, even on non-Windows systems there may run a firewall or anti-virus + software or similar that accepts the connection but does not actually do + anything else. This will make (lib)curl to consider the connection connected + and thus the connect timeout won't trigger. + + 5. libcurl Issues 5.1 Is libcurl thread-safe? @@ -898,7 +916,7 @@ FAQ If you use a OpenSSL-powered libcurl in a multi-threaded environment, you need to provide one or two locking functions: - http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION + http://www.openssl.org/docs/crypto/threads.html If you use a GnuTLS-powered libcurl in a multi-threaded environment, you need to provide locking function(s) for libgcrypt (which is used by GnuTLS |