Hi,

I have written an HTTPS client application using libcurl v7.23.1 (powered
by openssl for SSL support) on windows. I am using multi-interface to
connect to a remote HTTPS server and exchange data. Only a single easy
handle is added to the multi-stack. As illustrated in the code example for
using multi-interface on the libcurl site, I alternately call multi-perform
& select API in a loop. Once my client and the remote server have exchanged
data, the remote server sends ssl_close_notify and closes the TCP
connection.

I would like to know on the client side, what is the right way to identify
that the remote peer has disconnected gracefully i.e. closed the TCP
connection?

I have emperically verified that max_fd contains a value of -1 if we call
curl_multi_fdset () after remote peer has disconnected but I doubt if this
can be used as an indicator for deducing this (based on documentation of
culr_multi_fdset ()). I would expect that the number of running easy
handles to hit zero if peer disconnects but this doesn't happen.

Thanks
Ajil Koshy

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Received on 2012-02-08