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_write() read or write the
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 close_flag.
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_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