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Title "BIO_s_socket 3" C BIO_s_socket, BIO_new_socket - socket \s-1BIO\s0 Header "SYNOPSIS" .Vb 1 #include <openssl/bio.h> .Ve .Vb 1 BIO_METHOD *BIO_s_socket(void); .Ve .Vb 2 long BIO_set_fd(BIO *b, int fd, long close_flag); long BIO_get_fd(BIO *b, int *c); .Ve .Vb 1 BIO *BIO_new_socket(int sock, int close_flag); .Ve Header "DESCRIPTION" \fIBIO_s_socket() returns the socket \s-1BIO\s0 method. This is a wrapper round the platform's socket routines.

\fIBIO_read() and BIO_write() read or write the underlying socket. \fIBIO_puts() is supported but BIO_gets() is not.

If the close flag is set then the socket is shut down and closed when the \s-1BIO\s0 is freed.

\fIBIO_set_fd() sets the socket of \s-1BIO\s0 b to fd and the close flag to close_flag.

\fIBIO_get_fd() places the socket in c if it is not \s-1NULL\s0, it also returns the socket. If c is not \s-1NULL\s0 it should be of type (int *).

\fIBIO_new_socket() returns a socket \s-1BIO\s0 using sock and close_flag.

Header "NOTES" Socket BIOs also support any relevant functionality of file descriptor BIOs.

The reason for having separate file descriptor and socket BIOs is that on some platforms sockets are not file descriptors and use distinct I/O routines, Windows is one such platform. Any code mixing the two will not work on all platforms.

\fIBIO_set_fd() and BIO_get_fd() are macros.

Header "RETURN VALUES" \fIBIO_s_socket() returns the socket \s-1BIO\s0 method.

\fIBIO_set_fd() always returns 1.

\fIBIO_get_fd() returns the socket or -1 if the \s-1BIO\s0 has not been initialized.

\fIBIO_new_socket() returns the newly allocated \s-1BIO\s0 or \s-1NULL\s0 is an error occurred.

Header "SEE ALSO" \s-1TBA\s0