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4b35e174ca
As it turned out, some of new MediaTek based TP-Link devices use value from field at 0x3c offset in version 3 of TP-Link header to specify "Additional Hardware Version". Value from this field is validated during regular (GUI) firmware upgrade on devices like TL-WR840N v4 or TL-WR841N v13. If it's zero (based on some tests, it seems that firmware will accept anything != 0), errors like below are printed on console and upgrade fails: [ rsl_sys_updateFirmware ] 2137: Firmware Additional HardwareVersion check failed [ rdp_updateFirmware ] 345: perror:4506 Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>