In my multithreaded HTTPS server application running on Windows 2000, SSL_accept() occasionally returns -1 and SSL_get_error() returns SSL_ERROR_SYSCALL when there are many simultaneous connections. A rough figure is about 1 SSL_ERROR_SYSCALL in every 100 SSL_accept(). Neither the preceding calls to accept() or SSL_set_fd() indicate any error with the socket.
What's errno? AFAIK whenever something returns SSL_ERROR_SYSCALL, errno should be set.
Or, on Windows, it's something like WSAGetLastError() I think, and WASExxx instead of just Exxx. Regardless, OpenSSL is just reporting a failed system call, so check for the error in the ordinary way for your platform.
Scott Lamb
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