header_status
enum header_status got_header = MAYBE_HEADER;
__le16 header_status;
__le16 header_status;
if (header_status == ON)
else if (header_status == ERASE)
header_status = OFF;
if (header_status == ERASE)
header_status = OFF;
static enum { OFF, ON, ERASE } header_status = ON;
header_status = ON;
else if (header_status == ON)
header_status = ERASE;