Hi, SSL_pending() returns the number of bytes in the SSL buffer that have been decrypted by not requested by SSL_read(). This will occur when there is a mismatch between the number of bytes requested by SSL_read() and the block size used to encrypt/decrypt the data.
SSL_ERROR_WANT_READ (and SSL_ERROR_WANT_WRITE) are returned to indicate that an SSL handshake is going on, and is not complete, so you should re-call the same function. No data will be decrypted into the SSL buffer, so SSL_pending() will always return zero. This is described in the manual pages, I believe, and in Mr Rescorla's excellent book. G. -----Original Message----- From: Patrick Li [mailto:[EMAIL PROTECTED]] Sent: 12 March 2002 20:35 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: SSL_pending() and SSL_ERROR_WANT_READ Hi, I am experiencing the followings when running my SSL client on nonblocking sockets. 1. SSL_read() fails and SSL_get_error() returns SSL_ERROR_WANT_READ 2. my client program calls SSL_pending() and it returns non-zero. 3. since SSL_pending() is returning non zero, that is data available and my program won't select on the read socket. 4. call SSL_read() again and it returns SSL_ERROR_WANT_READ My question is the SSL_pending() returning of non-zero is misleading. As the subsequent SSL_read() call at step 4 is returning SSL_ERROR_WANT_READ again. So, may be I should not check SSL_pending() when SSL_read() returns SSL_ERROR_WANT_READ? Can someone confirm? Thanks a lot. Patrick ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED] ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
