socket_accept() - accept a connection on a socket
int socket_accept( int s, string read_callback,
string write_callback );
The argument s is a socket that has been created with socket_create(3),
bound to an address with socket_bind(3), and is listening for connec‐
tions after a socket_listen(3). socket_accept() extracts the first con‐
nection on the queue of pending connections, creates a new socket with
the same properties of s and allocates a new file descriptor for the
socket. If no pending connections are present on the queue,
socket_accept() returns an error as described below. The accepted
socket is used to read and write data to and from the socket which con‐
nected to this one; it is not used to accept more connections. The
original socket s remains open for accepting further connections.
The argument read_callback is the name of a function for the driver to
call when the new socket (not the accepting socket) receives data. The
write callback should follow this format:
void read_callback(int fd)
Where fd is the socket which is ready to accept data.
The argument write_callback is the name of a function for the driver to
call when the new socket (not the accepting socket) is ready to be
written to. The write callback should follow this format:
void write_callback(int fd)
Where fd is the socket which is ready to be written to.
Note: The close_callback of the accepting socket (not the new socket)
is called if the new socket closes unexpectedly, i.e. not as the result
of a socket_close(3) call. The close callback should follow this for‐
void close_callback(int fd)
Where fd is the socket which has closed.
socket_accept() returns a non-negative descriptor for the accepted
socket on success. On failure, it returns a negative value.
socket_error(3) can be used on the return value to get a text descrip‐
tion of the error.
EEFDRANGE Descriptor out of range.
EEBADF Descriptor is invalid.
EESECURITY Security violation attempted.
EEMODENOTSUPP Socket mode not supported.
EENOTLISTN Socket not listening.
EEWOULDBLOCK Operation would block.
EEINTR Interrupted system call.
EEACCEPT Problem with accept.
EENOSOCKS No more available efun sockets.
socket_bind(3), socket_connect(3), socket_create(3), socket_listen(3)