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Commit f90b59e6 authored by Damien George's avatar Damien George
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stmhal, modcc3k: Add ioctl to cc3k sockets so select works.

parent 133b083b
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stmhal/modcc3k.c
View file @ f90b59e6
......@@ -27,11 +27,15 @@
// We can't include stdio.h because it defines _types_fd_set, but we
// need to use the CC3000 version of this type.
// We can't include errno.h because CC3000 defines its own errnos.
// (And they are different to the standard ones!)
#include <std.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
// CC3000 defines its own ENOBUFS (different to standard one!)
// CC3000 uses global variable called errno
#undef ENOBUFS
#undef errno
#include "stm32f4xx_hal.h"
#include "mpconfig.h"
......@@ -45,6 +49,7 @@
#include "pin.h"
#include "genhdr/pins.h"
#include "spi.h"
#include "pybioctl.h"
#include "hci.h"
#include "socket.h"
......@@ -61,17 +66,20 @@ STATIC const mp_obj_type_t cc3k_socket_type;
STATIC mp_obj_t cc3k_socket_new(mp_uint_t family, mp_uint_t type, mp_uint_t protocol);
STATIC volatile uint32_t fd_state = 0;
STATIC volatile uint32_t fd_closed_state = 0;
STATIC volatile bool wlan_connected = false;
STATIC volatile bool ip_obtained = false;
STATIC int cc3k_get_fd_state(int fd) {
return (fd_state & (1<<fd));
STATIC int cc3k_get_fd_closed_state(int fd) {
return fd_closed_state & (1 << fd);
}
STATIC void cc3k_clear_fd_state(int fd) {
// reset socket state
fd_state &= ~(1<<fd);
STATIC void cc3k_set_fd_closed_state(int fd) {
fd_closed_state |= 1 << fd;
}
STATIC void cc3k_reset_fd_closed_state(int fd) {
fd_closed_state &= ~(1 << fd);
}
STATIC void cc3k_callback(long event_type, char *data, unsigned char length) {
......@@ -89,7 +97,7 @@ STATIC void cc3k_callback(long event_type, char *data, unsigned char length) {
break;
case HCI_EVNT_BSD_TCP_CLOSE_WAIT:
// mark socket for closure
fd_state |= (1<<((uint8_t)data[0]));
cc3k_set_fd_closed_state(data[0]);
break;
}
}
......@@ -338,8 +346,6 @@ STATIC const mp_obj_type_t cc3k_type = {
/******************************************************************************/
// Micro Python bindings; CC3k socket class
#define EPIPE (32)
//#define MAX_FD (8)
#define MAX_ADDRSTRLEN (128)
#define MAX_RX_PACKET (CC3000_RX_BUFFER_SIZE-CC3000_MINIMAL_RX_SIZE-1)
#define MAX_TX_PACKET (CC3000_TX_BUFFER_SIZE-CC3000_MINIMAL_TX_SIZE-1)
......@@ -362,7 +368,7 @@ STATIC mp_obj_t cc3k_socket_new(mp_uint_t family, mp_uint_t type, mp_uint_t prot
}
// clear socket state
cc3k_clear_fd_state(s->fd);
cc3k_reset_fd_closed_state(s->fd);
return s;
}
......@@ -375,7 +381,7 @@ STATIC void cc3k_socket_print(void (*print)(void *env, const char *fmt, ...), vo
STATIC mp_uint_t cc3k_socket_send(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
cc3k_socket_obj_t *self = self_in;
if (cc3k_get_fd_state(self->fd)) {
if (cc3k_get_fd_closed_state(self->fd)) {
closesocket(self->fd);
*errcode = EPIPE;
return 0;
......@@ -401,7 +407,7 @@ STATIC mp_uint_t cc3k_socket_send(mp_obj_t self_in, const void *buf, mp_uint_t s
STATIC mp_uint_t cc3k_socket_recv(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
cc3k_socket_obj_t *self = self_in;
if (cc3k_get_fd_state(self->fd)) {
if (cc3k_get_fd_closed_state(self->fd)) {
closesocket(self->fd);
return 0;
}
......@@ -475,7 +481,7 @@ STATIC mp_obj_t cc3k_socket_accept(mp_obj_t self_in) {
}
// clear socket state
cc3k_clear_fd_state(fd);
cc3k_reset_fd_closed_state(fd);
// create new socket object
cc3k_socket_obj_t *socket_obj = m_new_obj_with_finaliser(cc3k_socket_obj_t);
......@@ -587,9 +593,74 @@ STATIC const mp_map_elem_t cc3k_socket_locals_dict_table[] = {
STATIC MP_DEFINE_CONST_DICT(cc3k_socket_locals_dict, cc3k_socket_locals_dict_table);
mp_uint_t cc3k_ioctl(mp_obj_t self_in, mp_uint_t request, int *errcode, ...) {
cc3k_socket_obj_t *self = self_in;
va_list vargs;
va_start(vargs, errcode);
mp_uint_t ret;
if (request == MP_IOCTL_POLL) {
mp_uint_t flags = va_arg(vargs, mp_uint_t);
ret = 0;
int fd = self->fd;
// init fds
fd_set rfds, wfds, xfds;
FD_ZERO(&rfds);
FD_ZERO(&wfds);
FD_ZERO(&xfds);
// set fds if needed
if (flags & MP_IOCTL_POLL_RD) {
FD_SET(fd, &rfds);
// A socked that just closed is available for reading. A call to
// recv() returns 0 which is consistent with BSD.
if (cc3k_get_fd_closed_state(fd)) {
ret |= MP_IOCTL_POLL_RD;
}
}
if (flags & MP_IOCTL_POLL_WR) {
FD_SET(fd, &wfds);
}
if (flags & MP_IOCTL_POLL_HUP) {
FD_SET(fd, &xfds);
}
// call cc3000 select with minimum timeout
timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 1;
int nfds = select(fd + 1, &rfds, &wfds, &xfds, &tv);
// check for error
if (nfds == -1) {
*errcode = errno; // return cc3000's errno
return -1;
}
// check return of select
if (FD_ISSET(fd, &rfds)) {
ret |= MP_IOCTL_POLL_RD;
}
if (FD_ISSET(fd, &wfds)) {
ret |= MP_IOCTL_POLL_WR;
}
if (FD_ISSET(fd, &xfds)) {
ret |= MP_IOCTL_POLL_HUP;
}
} else {
*errcode = EINVAL;
ret = -1;
}
va_end(vargs);
return ret;
}
STATIC const mp_stream_p_t cc3k_socket_stream_p = {
.read = cc3k_socket_recv,
.write = cc3k_socket_send,
.ioctl = cc3k_ioctl,
.is_text = false,
};
STATIC const mp_obj_type_t cc3k_socket_type = {
......@@ -602,114 +673,6 @@ STATIC const mp_obj_type_t cc3k_socket_type = {
.locals_dict = (mp_obj_t)&cc3k_socket_locals_dict,
};
// the following code is for select, which is yet to be implemented
#if 0
#define MP_ASSERT_TYPE(obj, type) \
do { \
__typeof__ (obj) _a = (obj); \
__typeof__ (type) _b = (type); \
if (!MP_OBJ_IS_TYPE(_a, _b)) { \
nlr_jump(mp_obj_new_exception_msg_varg( \
&mp_type_TypeError, \
"can't convert %s to %s", \
mp_obj_get_type_str(_a), \
_b->name)); \
} \
} while(0)
// select helper functions
STATIC void set_fds(int *nfds, mp_obj_t *fdlist, mp_uint_t fdlist_len, fd_set *fdset) {
// clear fd set
FD_ZERO(fdset);
// add sockets to fd set
for (int i=0; i<fdlist_len; i++) {
socket_t *s = fdlist[i];
// check arg type
MP_ASSERT_TYPE(s, &cc3k_socket_type);
// add to fd set
FD_SET(s->fd, fdset);
if (s->fd > (*nfds)) {
*nfds = s->fd;
}
}
}
STATIC void get_fds(mp_obj_t *fdlist, mp_uint_t fdlist_len, mp_obj_t *fdlist_out, fd_set *fdset) {
for (int i=0; i<fdlist_len; i++) {
socket_t *s = fdlist[i];
if (FD_ISSET(s->fd, fdset)) {
socket_t *socket_obj = m_new_obj_with_finaliser(socket_t);
socket_obj->base.type = (mp_obj_t)&socket_type;
socket_obj->fd = s->fd;
mp_obj_list_append(fdlist_out, socket_obj);
}
}
}
STATIC mp_obj_t cc3k_select(mp_uint_t n_args, const mp_obj_t *args) {
int nfds=0; //highest-numbered fd plus 1
timeval tv={0};
fd_set rfds, wfds, xfds;
mp_obj_t *rlist, *wlist, *xlist;
mp_uint_t rlist_len, wlist_len, xlist_len;
// read args
mp_obj_get_array(args[0], &rlist_len, &rlist);
mp_obj_get_array(args[1], &wlist_len, &wlist);
mp_obj_get_array(args[2], &xlist_len, &xlist);
if (n_args == 4) {
float timeout = mp_obj_get_float(args[3]);
tv.tv_sec = (int)timeout;
tv.tv_usec = (timeout-(int)timeout)*1000*1000;
}
// add fds to their respective sets
set_fds(&nfds, rlist, rlist_len, &rfds);
set_fds(&nfds, wlist, wlist_len, &wfds);
set_fds(&nfds, xlist, xlist_len, &xfds);
// call select
nfds = select(nfds+1, &rfds, &wfds, &xfds, &tv);
// if any of the read sockets is closed, we add it to the read fd set,
// a subsequent call to recv() returns 0. This behavior is consistent with BSD.
for (int i=0; i<rlist_len; i++) {
socket_t *s = rlist[i];
if (cc3k_get_fd_state(s->fd)) {
FD_SET(s->fd, &rfds);
nfds = (nfds > s->fd)? nfds:s->fd;
}
}
// return value; a tuple of 3 lists
mp_obj_t fds[3] = {
mp_obj_new_list(0, NULL),
mp_obj_new_list(0, NULL),
mp_obj_new_list(0, NULL)
};
// On success, select() returns the number of file descriptors contained
// in the three returned descriptor sets which may be zero if the timeout
// expires before anything interesting happens, -1 is returned on error.
if (nfds == -1) { // select failed
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "select failed"));
} else if (nfds) { // an fd is ready
get_fds(rlist, rlist_len, fds[0], &rfds);
get_fds(wlist, wlist_len, fds[1], &wfds);
get_fds(xlist, xlist_len, fds[2], &xfds);
} // select timedout
return mp_obj_new_tuple(3, fds);
}
#endif
/******************************************************************************/
// Micro Python bindings; CC3k module
......
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