• Diogenes Pereira's avatar
    mac802154: Fix MAC header and payload encrypted · 3e496266
    Diogenes Pereira authored
    According to  802.15.4-2003/2006/2015 specifications the MAC frame is
    composed of MHR, MAC payload and MFR and just the outgoing MAC payload
    must be encrypted.
    
    If communication is secure,sender build Auxiliary Security Header(ASH),
    insert it next to the standard MHR header with security enabled bit ON,
    and secure frames before transmitting them. According to the information
    carried within the ASH, recipient retrieves the right cryptographic key
    and correctly un-secure MAC frames.
    
    The error scenario occurs on Linux using IEEE802154_SCF_SECLEVEL_ENC(4)
    security level when llsec_do_encrypt_unauth() function builds theses MAC
    frames incorrectly. On recipients these MAC frames are discarded,logging
    "got invalid frame" messages.
    Signed-off-by: default avatarDiogenes Pereira <dvnp@cesar.org.br>
    Signed-off-by: default avatarStefan Schmidt <stefan@osg.samsung.com>
    3e496266
llsec.c 25.1 KB