It seems to me that when the Curl_Send function
returns 0, then either the openssl statemachine had returned
SSL_ERROR_WANT_READ or
SSL_ERROR_WANT_WRITE.
rc = SSL_write(conn->ssl[sockindex].handle, mem, memlen);
if(rc < 0) {
err = SSL_get_error(conn->ssl[sockindex].handle, rc);
switch(err) {
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
/* The operation did not complete; the same TLS/SSL I/O function
should be called again later. This is basicly an EWOULDBLOCK
equivalent. */
return 0;
Depending on that one must select for reading or writing,
(in a loop), but how?
http://www.openssl.org/docs/ssl/SSL_get_error.html
