Add WPA-None support:

* WPA-None requires ap_scan=2:
  The major difference between ap_scan=1 (default) and 2 is, that no
  IEEE80211_IOC_SCAN* ioctls/functions are called, though, there is a
  dependency on those. For example the call to wpa_driver_bsd_scan()
  sets the interface UP, this never happens, therefore the interface
  must be marked up in wpa_driver_bsd_associate(). IEEE80211_IOC_SSID
  also is not called, which means that the SSID has not been set prior
  to the IEEE80211_MLME_ASSOC call.
* WPA-None has no support for sequence number updates, it doesn't make
  sense to check for replay violations..
* I had some crashes right after the switch to RUN state, issue is
  that sc->sc_lastrs was not yet defined.

Approved by:	rpaulo (mentor)
MFC after:	3 weeks

1 files changed, 8 insertions, 2 deletions

diff --git a/sys/dev/ath/if_ath.c b/sys/dev/ath/if_ath.c
index d1ddb2d..5847489 100644
--- a/sys/dev/ath/if_ath.c
+++ b/sys/dev/ath/if_ath.c
@@ -3654,8 +3654,14 @@ ath_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m,
 	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
 		if (vap->iv_opmode == IEEE80211_M_IBSS &&
 		    vap->iv_state == IEEE80211_S_RUN) {
-			uint32_t rstamp = sc->sc_lastrs->rs_tstamp;
-			u_int64_t tsf = ath_extend_tsf(rstamp,
+			uint32_t rstamp;
+			uint64_t tsf;
+
+			if (sc->sc_lastrs == NULL)
+				break;
+
+			rstamp = sc->sc_lastrs->rs_tstamp;
+			tsf = ath_extend_tsf(rstamp,
 				ath_hal_gettsf64(sc->sc_ah));
 			/*
 			 * Handle ibss merge as needed; check the tsf on the