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.\" ========================================================================
.\"
.IX Title "SSL_pending 3"
.TH SSL_pending 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
SSL_pending \- obtain number of readable bytes buffered in an SSL object
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& int SSL_pending(const SSL *ssl);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_pending()\fR returns the number of bytes which are available inside
\&\fBssl\fR for immediate read.
.SH "NOTES"
.IX Header "NOTES"
Data are received in blocks from the peer. Therefore data can be buffered
inside \fBssl\fR and are ready for immediate retrieval with
\&\fBSSL_read\fR\|(3).
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The number of bytes pending is returned.
.SH "BUGS"
.IX Header "BUGS"
\&\fBSSL_pending()\fR takes into account only bytes from the \s-1TLS/SSL\s0 record
that is currently being processed (if any).  If the \fB\s-1SSL\s0\fR object's
\&\fIread_ahead\fR flag is set (see
\&\fBSSL_CTX_set_read_ahead\fR\|(3)), additional protocol
bytes may have been read containing more \s-1TLS/SSL\s0 records; these are ignored by
\&\fBSSL_pending()\fR.
.PP
Up to OpenSSL 0.9.6, \fBSSL_pending()\fR does not check if the record type
of pending data is application data.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBSSL_read\fR\|(3),
\&\fBSSL_CTX_set_read_ahead\fR\|(3), \fBssl\fR\|(3)