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Diffstat (limited to 'doc/ssl/SSL_get_error.pod')
| -rw-r--r-- | doc/ssl/SSL_get_error.pod | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/doc/ssl/SSL_get_error.pod b/doc/ssl/SSL_get_error.pod deleted file mode 100644 index d85b5642582..00000000000 --- a/doc/ssl/SSL_get_error.pod +++ /dev/null @@ -1,93 +0,0 @@ -=pod - -=head1 NAME - -SSL_get_error - obtain result code for TLS/SSL I/O operation - -=head1 SYNOPSIS - - #include <openssl/ssl.h> - - int SSL_get_error(SSL *ssl, int ret); - -=head1 DESCRIPTION - -SSL_get_error() returns a result code (suitable for the C "switch" -statement) for a preceding call to SSL_connect(), SSL_accept(), -SSL_read(), or SSL_write() on B<ssl>. The value returned by that -TLS/SSL I/O function must be passed to SSL_get_error() in parameter -B<ret>. - -In addition to B<ssl> and B<ret>, SSL_get_error() inspects the -current thread's OpenSSL error queue. Thus, SSL_get_error() must be -used in the same thread that performed the TLS/SSL I/O operation, and no -other OpenSSL function calls should appear in between. The current -thread's error queue must be empty before the TLS/SSL I/O operation is -attempted, or SSL_get_error() will not work reliably. - -=head1 RETURN VALUES - -The following return values can currently occur: - -=over 4 - -=item SSL_ERROR_NONE - -The TLS/SSL I/O operation completed. This result code is returned -if and only if B<ret E<gt> 0>. - -=item SSL_ERROR_ZERO_RETURN - -The TLS/SSL connection has been closed. If the protocol version is SSL 3.0 -or TLS 1.0, this result code is returned only if a closure -alert has occurred in the protocol, i.e. if the connection has been -closed cleanly. Note that in this case B<SSL_ERROR_ZERO_RETURN> -does not necessarily indicate that the underlying transport -has been closed. - -=item SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE - -The operation did not complete; the same TLS/SSL I/O function should be -called again later. There will be protocol progress if, by then, the -underlying B<BIO> has data available for reading (if the result code is -B<SSL_ERROR_WANT_READ>) or allows writing data (B<SSL_ERROR_WANT_WRITE>). -For socket B<BIO>s (e.g. when SSL_set_fd() was used) this means that -select() or poll() on the underlying socket can be used to find out -when the TLS/SSL I/O function should be retried. - -Caveat: Any TLS/SSL I/O function can lead to either of -B<SSL_ERROR_WANT_READ> and B<SSL_ERROR_WANT_WRITE>, i.e. SSL_read() -may want to write data and SSL_write() may want to read data. - -=item SSL_ERROR_WANT_X509_LOOKUP - -The operation did not complete because an application callback set by -SSL_CTX_set_client_cert_cb() has asked to be called again. -The TLS/SSL I/O function should be called again later. -Details depend on the application. - -=item SSL_ERROR_SYSCALL - -Some I/O error occurred. The OpenSSL error queue may contain more -information on the error. If the error queue is empty -(i.e. ERR_get_error() returns 0), B<ret> can be used to find out more -about the error: If B<ret == 0>, an EOF was observed that violates -the protocol. If B<ret == -1>, the underlying B<BIO> reported an -I/O error (for socket I/O on Unix systems, consult B<errno> for details). - -=item SSL_ERROR_SSL - -A failure in the SSL library occurred, usually a protocol error. The -OpenSSL error queue contains more information on the error. - -=back - -=head1 SEE ALSO - -L<ssl(3)|ssl(3)>, L<err(3)|err(3)> - -=head1 HISTORY - -SSL_get_error() was added in SSLeay 0.8. - -=cut |
