On Tue, Jun 04, 2013 at 07:47:20PM +0300, Vladimir Kondratiev wrote: > I am a bit confused. I supposed that if devices A and B (not in a group yet) > try to discover each other, it works like the following > > A ---- probe-req ---> B (now B knows A) > A <--- probe-resp ---- B (now A knows B) This depends on what exactly you mean with "discover". Sure, it is known that there is a P2P peer in the environment if a Probe Request frame with P2P IE is received from it. However, that does not necessarily mean we know enough of that peer to initiate new P2P operations. > But if device is discovered by probe-resp only, it mean this should be > > A ---- probe-req ---> B > A <--- probe-resp ---- B (now A knows B) > A <--- probe-req ---- B > A ---- probe-resp ---> B (now B knows A) Probe Response frames include more information about the peer and that allows wpa_supplicant to complete the peer entry. This is the point when the peer is fully known and indicated to upper layers. The Probe Request frame RX case is just used internally within wpa_supplicant. (For completeness, number of other frames, i.e., P2P Action frames, can also complete the P2P peer entry, so this does not need to be Probe Response). -- Jouni Malinen PGP id EFC895FA -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
