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+.\" Automatically generated by Pod::Man version 1.15
+.\" Thu May 9 13:20:48 2002
+.\"
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+.\" ======================================================================
+.\"
+.IX Title "SSL_ACCEPT 1"
+.TH SSL_ACCEPT 1 "perl v5.6.1" "2002-01-27" "User Contributed Perl Documentation"
+.UC
+.SH "NAME"
+SSL_accept \- wait for a \s-1TLS/SSL\s0 client to initiate a \s-1TLS/SSL\s0 handshake
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/ssl.h>
+.Ve
+.Vb 1
+\& int SSL_accept(SSL *ssl);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+\&\fISSL_accept()\fR waits for a \s-1TLS/SSL\s0 client to initiate the \s-1TLS/SSL\s0 handshake.
+The communication channel must already have been set and assigned to the
+\&\fBssl\fR by setting an underlying \fB\s-1BIO\s0\fR.
+.SH "NOTES"
+.IX Header "NOTES"
+The behaviour of \fISSL_accept()\fR depends on the underlying \s-1BIO\s0.
+.PP
+If the underlying \s-1BIO\s0 is \fBblocking\fR, \fISSL_accept()\fR will only return once the
+handshake has been finished or an error occurred, except for \s-1SGC\s0 (Server
+Gated Cryptography). For \s-1SGC\s0, \fISSL_accept()\fR may return with \-1, but
+\&\fISSL_get_error()\fR will yield \fB\s-1SSL_ERROR_WANT_READ/WRITE\s0\fR and \fISSL_accept()\fR
+should be called again.
+.PP
+If the underlying \s-1BIO\s0 is \fBnon-blocking\fR, \fISSL_accept()\fR will also return
+when the underlying \s-1BIO\s0 could not satisfy the needs of \fISSL_accept()\fR
+to continue the handshake. In this case a call to \fISSL_get_error()\fR with the
+return value of \fISSL_accept()\fR will yield \fB\s-1SSL_ERROR_WANT_READ\s0\fR or
+\&\fB\s-1SSL_ERROR_WANT_WRITE\s0\fR. The calling process then must repeat the call after
+taking appropriate action to satisfy the needs of \fISSL_accept()\fR.
+The action depends on the underlying \s-1BIO\s0. When using a non-blocking socket,
+nothing is to be done, but \fIselect()\fR can be used to check for the required
+condition. When using a buffering \s-1BIO\s0, like a \s-1BIO\s0 pair, data must be written
+into or retrieved out of the \s-1BIO\s0 before being able to continue.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+The following return values can occur:
+.Ip "1" 4
+.IX Item "1"
+The \s-1TLS/SSL\s0 handshake was successfully completed, a \s-1TLS/SSL\s0 connection has been
+established.
+.Ip "0" 4
+The \s-1TLS/SSL\s0 handshake was not successful but was shut down controlled and
+by the specifications of the \s-1TLS/SSL\s0 protocol. Call \fISSL_get_error()\fR with the
+return value \fBret\fR to find out the reason.
+.Ip "<0" 4
+.IX Item "<0"
+The \s-1TLS/SSL\s0 handshake was not successful because a fatal error occurred either
+at the protocol level or a connection failure occurred. The shutdown was
+not clean. It can also occur of action is need to continue the operation
+for non-blocking BIOs. Call \fISSL_get_error()\fR with the return value \fBret\fR
+to find out the reason.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+SSL_get_error(3), SSL_connect(3),
+SSL_shutdown(3), ssl(3), bio(3),
+SSL_set_connect_state(3),
+SSL_CTX_new(3)