NAME¶
BIO_s_socket, BIO_new_socket - socket BIO
SYNOPSIS¶
#include <openssl/bio.h>
BIO_METHOD *BIO_s_socket(void);
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);
DESCRIPTION¶
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
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.
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.
BIO_set_fd() and
BIO_get_fd() are macros.
RETURN VALUES¶
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
initialized.
BIO_new_socket() returns the newly allocated BIO or NULL is an error
occurred.
SEE ALSO¶
TBA