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//opt/cpanel/ea-openssl11/share/man/man3/SSL_set_rfd.3
.\" Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. 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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_set_fd, SSL_set_rfd, SSL_set_wfd \- connect the SSL object with a file descriptor .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/ssl.h> \& \& int SSL_set_fd(SSL *ssl, int fd); \& int SSL_set_rfd(SSL *ssl, int fd); \& int SSL_set_wfd(SSL *ssl, int fd); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fISSL_set_fd()\fR sets the file descriptor \fBfd\fR as the input/output facility for the \s-1TLS/SSL \s0(encrypted) side of \fBssl\fR. \fBfd\fR will typically be the socket file descriptor of a network connection. .PP When performing the operation, a \fBsocket \s-1BIO\s0\fR is automatically created to interface between the \fBssl\fR and \fBfd\fR. The \s-1BIO\s0 and hence the \s-1SSL\s0 engine inherit the behaviour of \fBfd\fR. If \fBfd\fR is nonblocking, the \fBssl\fR will also have nonblocking behaviour. .PP If there was already a \s-1BIO\s0 connected to \fBssl\fR, \fIBIO_free()\fR will be called (for both the reading and writing side, if different). .PP \&\fISSL_set_rfd()\fR and \fISSL_set_wfd()\fR perform the respective action, but only for the read channel or the write channel, which can be set independently. .SH "RETURN VALUES" .IX Header "RETURN VALUES" The following return values can occur: .IP "0" 4 The operation failed. Check the error stack to find out why. .IP "1" 4 .IX Item "1" The operation succeeded. .SH "NOTES" .IX Header "NOTES" On Windows, a socket handle is a 64\-bit data type (\s-1UINT_PTR\s0), which leads to a compiler warning (conversion from '\s-1SOCKET\s0' to 'int', possible loss of data) when passing the socket handle to SSL_set_*\fIfd()\fR. For the time being, this warning can safely be ignored, because although the Microsoft documentation claims that the upper limit is \s-1INVALID_SOCKET\-1 \s0(2^64 \- 2), in practice the current \fIsocket()\fR implementation returns an index into the kernel handle table, the size of which is limited to 2^24. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fISSL_get_fd\fR\|(3), \fISSL_set_bio\fR\|(3), \&\fISSL_connect\fR\|(3), \fISSL_accept\fR\|(3), \&\fISSL_shutdown\fR\|(3), \fIssl\fR\|(7) , \fIbio\fR\|(7) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2000\-2021 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
