Syntax
enum {
SEND_M1, RECV_M2, SEND_M3, RECV_M4, SEND_M5, RECV_M6, SEND_M7,
RECV_M8, RECEIVED_M2D, WPS_MSG_DONE, RECV_ACK, WPS_FINISHED,
SEND_WSC_NACK,
RECV_M1, SEND_M2, RECV_M3, SEND_M4, RECV_M5, SEND_M6,
RECV_M7, SEND_M8, RECV_DONE, SEND_M2D, RECV_M2D_ACK
} state;