wpa_supplicant: TNCC support reentrant ?
j at w1.fi
Mon Apr 13 05:17:16 EDT 2009
On Mon, Apr 13, 2009 at 10:04:56AM +0900, r.ooba at ictec.co.jp wrote:
> - Is TNCC support the multi interface ?
> (Wireless LAN and Wired LAN etc, for instance.)
Do you mean concurrent negotiations for multiple network interfaces? I
don't think there is any explicit support for this and in practice, this
may show up as multiple TNCC instances trying to use the IMC at the same
> - Is TNCC support reentrant ?
> (Please, refer to the TNC_IFIMC_v1_2_r8.pdf, p.17,
> 3.3 Threading and Reentrancy.)
> - Is TNCC support thread-safe ?
> (Please, refer to the TNC_IFIMC_v1_2_r8.pdf, p.40,
> 4.2.4 Threading.)
I don't think the current version would handle multiple IMC threads
nicely, i.e., there is currently no synchronization or protection on
data since the code in wpa_supplicant assumes everything to live in a
single thread. Eventually, the TNCC code would need to handle this in a
way that isolates the possibility of calls from other threads from
confusing the core wpa_supplicant code.
Jouni Malinen PGP id EFC895FA
More information about the HostAP