static int _recv(netdev_t *netdev, void *buf, size_t len, void* info)
{
(void) info;
ethos_t * dev = (ethos_t *) netdev;
if (buf) {
if (len < dev->last_framesize) {
DEBUG("ethos _recv(): receive buffer too small.\n");
return -1;
}
len = dev->last_framesize;
dev->last_framesize = 0;
if ((tsrb_get(&dev->inbuf, buf, len) != (int)len)) {
DEBUG("ethos _recv(): inbuf doesn't contain enough bytes.\n");
return -1;
}
return (int)len;
}
else {
return dev->last_framesize;
}
}
static void _end_of_frame(ethos_t *dev)
{
switch(dev->frametype) {
case ETHOS_FRAME_TYPE_DATA:
if (dev->framesize) {
dev->last_framesize = dev->framesize;
dev->netdev.event_callback((netdev_t*) dev, NETDEV_EVENT_ISR);
}
break;
case ETHOS_FRAME_TYPE_HELLO:
ethos_send_frame(dev, dev->mac_addr, 6, ETHOS_FRAME_TYPE_HELLO_REPLY);
/* fall through */
case ETHOS_FRAME_TYPE_HELLO_REPLY:
if (dev->framesize == 6) {
tsrb_get(&dev->inbuf, (char*)dev->remote_mac_addr, 6);
}
break;
}
_reset_state(dev);
}
static int _recv(netdev2_t *netdev, char* buf, int len, void* info)
{
(void) info;
ethos_t * dev = (ethos_t *) netdev;
if (buf) {
if (len != dev->last_framesize) {
DEBUG("ethos _recv(): unmatched receive buffer size.");
return -1;
}
dev->last_framesize = 0;
if ((tsrb_get(&dev->inbuf, buf, len) != len)) {
DEBUG("ethos _recv(): inbuf doesn't contain enough bytes.");
return -1;
}
return len;
}
else {
return dev->last_framesize;
}
}
