Implemented additional checks. Add force flag to flash firmware even if modem is in BIOS mode.

firmware/firmware.go

@@ -18,6 +18,7 @@ func FwExists(path string) bool {
 	return !errors.Is(err, os.ErrNotExist)
 }
 
+// ChkHeader: runs header and CRC checks on the firmware file
 func ChkHeader(fwfile string) error {
 	log.Info("checking ", fwfile)
 	// SCS has two different file layouts, one for the "Dragons", the other for any older modem
@@ -62,9 +63,7 @@ func ChkHeader(fwfile string) error {
 		size = uint32(binary.LittleEndian.Uint16(firmware[2:4])) // PTC-3 and Co
 	}
 	a := make([]byte, 4)
-	//binary.LittleEndian.PutUint32(a, crc32.ChecksumIEEE(firmware[4:size+4])) // PTC-3
 	binary.LittleEndian.PutUint32(a, crc32.ChecksumIEEE(firmware[offset:offset+size]))
-	//if bytes.Equal(a, firmware[4+size:8+size]) { // PTC-3
 	if bytes.Equal(a, firmware[offset+size:offset+size+4]) {
 		log.Info("CRC checksum ok!")
 	} else {