BIO_s_socket(3) OpenSSL BIO_s_socket(3)
BIO_s_socket, BIO_new_socket - socket BIO
long BIO_set_fd(BIO *b, int fd, long close_flag);
long BIO_get_fd(BIO *b, int *c);
BIO *BIO_new_socket(int sock, int close_flag);
BIO_s_socket() returns the socket BIO method. This is a wrapper round
the platform's socket routines.
BIO_read() and BIO_write() read or write the underlying socket.
BIO_puts() is supported but BIO_gets() is not.
If the close flag is set then the socket is shut down and closed when
the BIO is freed.
BIO_set_fd() sets the socket of BIO b to fd and the close flag to
BIO_get_fd() places the socket in c if it is not NULL, it also returns
the socket. If c is not NULL it should be of type (int *).
BIO_new_socket() returns a socket BIO using sock and close_flag.
Socket BIOs also support any relevant functionality of file descriptor
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.
BIO_set_fd() and BIO_get_fd() are macros.
BIO_s_socket() returns the socket BIO method.
BIO_set_fd() always returns 1.
BIO_get_fd() returns the socket or -1 if the BIO has not been
BIO_new_socket() returns the newly allocated BIO or NULL is an error
1.0.1i 2009-07-20 BIO_s_socket(3)