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1 .\" $NetBSD: SSL_pending.3,v 1.14 2015/06/12 17:01:14 christos Exp $
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135 .\" ========================================================================
136 .\"
137 .IX Title "SSL_pending 3"
138 .TH SSL_pending 3 "2015-03-23" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
140 .\" way too many mistakes in technical documents.
141 .if n .ad l
142 .nh
143 .SH "NAME"
144 SSL_pending \- obtain number of readable bytes buffered in an SSL object
145 .SH "LIBRARY"
146 libcrypto, -lcrypto
147 .SH "SYNOPSIS"
148 .IX Header "SYNOPSIS"
149 .Vb 1
150 \& #include <openssl/ssl.h>
151 \&
152 \& int SSL_pending(const SSL *ssl);
153 .Ve
154 .SH "DESCRIPTION"
155 .IX Header "DESCRIPTION"
156 \&\fISSL_pending()\fR returns the number of bytes which are available inside
157 \&\fBssl\fR for immediate read.
158 .SH "NOTES"
159 .IX Header "NOTES"
160 Data are received in blocks from the peer. Therefore data can be buffered
161 inside \fBssl\fR and are ready for immediate retrieval with
162 \&\fISSL_read\fR\|(3).
163 .SH "RETURN VALUES"
164 .IX Header "RETURN VALUES"
165 The number of bytes pending is returned.
166 .SH "BUGS"
167 .IX Header "BUGS"
168 \&\fISSL_pending()\fR takes into account only bytes from the \s-1TLS/SSL\s0 record
169 that is currently being processed (if any). If the \fB\s-1SSL\s0\fR object's
170 \&\fIread_ahead\fR flag is set (see
171 \&\fISSL_CTX_set_read_ahead\fR\|(3)), additional protocol
172 bytes may have been read containing more \s-1TLS/SSL\s0 records; these are ignored by
173 \&\fISSL_pending()\fR.
174 .PP
175 Up to OpenSSL 0.9.6, \fISSL_pending()\fR does not check if the record type
176 of pending data is application data.
177 .SH "SEE ALSO"
178 .IX Header "SEE ALSO"
179 \&\fISSL_read\fR\|(3),
180 \&\fISSL_CTX_set_read_ahead\fR\|(3), \fIssl\fR\|(3)