Thanks for response. Well, I mean, are those hardware cryptography and nohwcrypt modparam applying only to management frames (i.e., are data frames already being en/decrypted by using software cryptography in mac/ieee80211 kernel module?)
Regards, Jeon. On Wed, Oct 26, 2016 at 7:38 PM, Janusz Dziedzic <janusz.dzied...@tieto.com> wrote: > > > On 26 October 2016 at 08:53, Jeon <sjeon87+at...@gmail.com> wrote: > >> I am investigating how ath9k performs cryptography. >> >> In slide 15 of DEFCON conference 2014 (link >> <https://docs.google.com/presentation/d/1CofNlbHs2bLdJuW3VACzAImqesGQoktUTXS6zKgDDKI/edit#slide=id.g371192f19_070>), >> it says, ath9k performs cryptography a on software side. >> >> On the other hand, when I look into ath9k source codes, I found >> somethings like below: >> >> ath9k/common.c:162-166: >> >> if (ah->sw_mgmt_crypto_rx && >> (rxs->flag & RX_FLAG_DECRYPTED) && >> ieee80211_is_mgmt(fc)) >> /* Use software decrypt for management frames. */ >> rxs->flag &= ~RX_FLAG_DECRYPTED; >> >> As I understand, ath9k can choose hw/sw cryptography for management >> frames. However, what about data frames? I couldn't find any clue about >> cryptography for data frames. >> >> Can I take it as ath9k already performs software cryptography for data >> frames and shifts the responsibility of cryptography to mac80211 driver? >> And exceptionally for management frames, can ath9k choose hw/sw >> cryptography? >> >> > modinfo ath9k (check nohwcrypt param) > > BR > Janusz >
_______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
