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137 .IX Title "BIO_s_socket 3"
138 .TH BIO_s_socket 3 "2009-07-19" "1.0.1n" "OpenSSL"
139 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
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144 BIO_s_socket, BIO_new_socket \- socket BIO
148 .IX Header "SYNOPSIS"
150 \& #include <openssl/bio.h>
152 \& BIO_METHOD *BIO_s_socket(void);
154 \& long BIO_set_fd(BIO *b, int fd, long close_flag);
155 \& long BIO_get_fd(BIO *b, int *c);
157 \& BIO *BIO_new_socket(int sock, int close_flag);
160 .IX Header "DESCRIPTION"
161 \&\fIBIO_s_socket()\fR returns the socket \s-1BIO\s0 method. This is a wrapper
162 round the platform's socket routines.
164 \&\fIBIO_read()\fR and \fIBIO_write()\fR read or write the underlying socket.
165 \&\fIBIO_puts()\fR is supported but \fIBIO_gets()\fR is not.
167 If the close flag is set then the socket is shut down and closed
168 when the \s-1BIO\s0 is freed.
170 \&\fIBIO_set_fd()\fR sets the socket of \s-1BIO \s0\fBb\fR to \fBfd\fR and the close
171 flag to \fBclose_flag\fR.
173 \&\fIBIO_get_fd()\fR places the socket in \fBc\fR if it is not \s-1NULL,\s0 it also
174 returns the socket. If \fBc\fR is not \s-1NULL\s0 it should be of type (int *).
176 \&\fIBIO_new_socket()\fR returns a socket \s-1BIO\s0 using \fBsock\fR and \fBclose_flag\fR.
179 Socket BIOs also support any relevant functionality of file descriptor
182 The reason for having separate file descriptor and socket BIOs is that on some
183 platforms sockets are not file descriptors and use distinct I/O routines,
184 Windows is one such platform. Any code mixing the two will not work on
187 \&\fIBIO_set_fd()\fR and \fIBIO_get_fd()\fR are macros.
189 .IX Header "RETURN VALUES"
190 \&\fIBIO_s_socket()\fR returns the socket \s-1BIO\s0 method.
192 \&\fIBIO_set_fd()\fR always returns 1.
194 \&\fIBIO_get_fd()\fR returns the socket or \-1 if the \s-1BIO\s0 has not been
197 \&\fIBIO_new_socket()\fR returns the newly allocated \s-1BIO\s0 or \s-1NULL\s0 is an error
200 .IX Header "SEE ALSO"