static void h4_statemachine(void) {
switch (h4_state) {
case H4_W4_PACKET_TYPE:
if (hci_packet[0] == HCI_EVENT_PACKET) {
bytes_to_read = HCI_EVENT_HEADER_SIZE;
h4_state = H4_W4_EVENT_HEADER;
} else if (hci_packet[0] == HCI_ACL_DATA_PACKET) {
bytes_to_read = HCI_ACL_HEADER_SIZE;
h4_state = H4_W4_ACL_HEADER;
} else {
log_error("h4_process: invalid packet type 0x%02x", hci_packet[0]);
read_pos = 0;
bytes_to_read = 1;
}
break;
case H4_W4_EVENT_HEADER:
bytes_to_read = hci_packet[2];
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_ACL_HEADER:
bytes_to_read = READ_BT_16( hci_packet, 3);
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_PAYLOAD:
h4_deliver_packet();
break;
default:
break;
}
}
static void h4_statemachine(void){
switch (h4_state) {
case H4_W4_PACKET_TYPE:
switch (hci_packet[0]){
case HCI_EVENT_PACKET:
bytes_to_read = HCI_EVENT_HEADER_SIZE;
h4_state = H4_W4_EVENT_HEADER;
break;
case HCI_ACL_DATA_PACKET:
bytes_to_read = HCI_ACL_HEADER_SIZE;
h4_state = H4_W4_ACL_HEADER;
break;
case HCI_SCO_DATA_PACKET:
bytes_to_read = HCI_SCO_HEADER_SIZE;
h4_state = H4_W4_SCO_HEADER;
break;
default:
log_error("h4_process: invalid packet type 0x%02x", hci_packet[0]);
h4_reset_statemachine();
break;
}
break;
case H4_W4_EVENT_HEADER:
bytes_to_read = hci_packet[2];
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_ACL_HEADER:
bytes_to_read = READ_BT_16( hci_packet, 3);
// check ACL length
if (HCI_ACL_HEADER_SIZE + bytes_to_read > HCI_PACKET_BUFFER_SIZE){
log_error("h4_process: invalid ACL payload len %u - only space for %u", bytes_to_read, HCI_PACKET_BUFFER_SIZE - HCI_ACL_HEADER_SIZE);
h4_reset_statemachine();
break;
}
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_SCO_HEADER:
bytes_to_read = hci_packet[3];
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_PAYLOAD:
h4_deliver_packet();
break;
default:
break;
}
}
