1SSL_set_fd(3)                       OpenSSL                      SSL_set_fd(3)
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NAME

6       SSL_set_fd - connect the SSL object with a file descriptor
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SYNOPSIS

9        #include <openssl/ssl.h>
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11        int SSL_set_fd(SSL *ssl, int fd);
12        int SSL_set_rfd(SSL *ssl, int fd);
13        int SSL_set_wfd(SSL *ssl, int fd);
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DESCRIPTION

16       SSL_set_fd() sets the file descriptor fd as the input/output facility
17       for the TLS/SSL (encrypted) side of ssl. fd will typically be the
18       socket file descriptor of a network connection.
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20       When performing the operation, a socket BIO is automatically created to
21       interface between the ssl and fd. The BIO and hence the SSL engine
22       inherit the behaviour of fd. If fd is non-blocking, the ssl will also
23       have non-blocking behaviour.
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25       If there was already a BIO connected to ssl, BIO_free() will be called
26       (for both the reading and writing side, if different).
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28       SSL_set_rfd() and SSL_set_wfd() perform the respective action, but only
29       for the read channel or the write channel, which can be set
30       independently.
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RETURN VALUES

33       The following return values can occur:
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35       0   The operation failed. Check the error stack to find out why.
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37       1   The operation succeeded.
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SEE ALSO

40       SSL_get_fd(3), SSL_set_bio(3), SSL_connect(3), SSL_accept(3),
41       SSL_shutdown(3), ssl(3) , bio(3)
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451.0.2o                            2020-08-01                     SSL_set_fd(3)