Hi all,
I'm working on a multi-clients server under Windows2k.
My problem is about file descriptor / socket confusion
when creating a BIO.
In fact main code's jobe is to accept the socket in an
"int" variable, then CreateProcess(). This function is
called with newly accepted socket as argument, in
place of file descriptor number 0 (input).
ctrl = accept();
si.hStdInput = ctrl;
si.hStdOutput = INVALID_HANDLE_VALUE;
si.hStdError = INVALID_HANDLE_VALUE;
si.dwFlags = STARTF_USESTDHANDLES;
CreateProcess(..., &si);
New process will inherit socket as file descriptor 0.
Then problems come :
I create a BIO with BIO_new_socket(); then the ssl
object and do the setbio() on this ssl object.
Then SSL_accept() is called and application fails with
"memory could not be written message".
I've tryied to set the BIO using BIO_new_fd(). Since
windows has problems with file descriptor and socket
mixing. Damned, with this BIO it works strangely, in
fact my client dumps this error :
SSL: error:140920F8:SSL
routines:SSL3_GET_SERVER_HELLO:unknown cipher returned
But i have no segfault.
I have also tryed to use: BIO_new(BIO_s_socket()) in
order to retrieve to right method. No success,
application segfaults too.
I really tought that with this BIO methods, the lib
will gives me the desired BIO to create my ssl object.
I think there is a problem with this file descriptor 0
used as a socket. In fact when i don't createProcess
and manage only one client, the socket is always the
descriptor retrieved from accept() call, and there is
no problem when i do a BIO_new_socket(), setbio() and
ssl_accept(). All works great.
Do you think i have to try to inherit socket in
another handler than stdin ? Or maybe it is a problem
in the openssl lib ?
Version used is: openssl-0.9.7d
thanks in advance
Regards,
NB: Same code (ssl context init, client verification
setting, calist loading ...) with fork() is used with
success under Unix. The only difference is that unix
handles sockets as well as file descriptors with no
difference. Write/send, read/recv could be used with
fd or socket, not under windows. Maybe the bio is not
able to be correctly set and leads to errors.
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