[PATCH] softmac: Fix handling of authentication failure

My router blew up earlier, but exhibited some interesting behaviour during
its dying moments. It was broadcasting beacons but wouldn't respond to
any authentication requests.

I noticed that softmac wasn't playing nice with this, as I couldn't make it try
to connect to other networks after it had timed out authenticating to my ill
router.

To resolve this, I modified the softmac event/notify API to pass the event
code to the callback, so that callbacks being notified from
IEEE80211SOFTMAC_EVENT_ANY masks can make some judgement. In this case, the
ieee80211softmac_assoc callback needs to make a decision based upon whether
the association passed or failed.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 19 insertions, 3 deletions

diff --git a/net/ieee80211/softmac/ieee80211softmac_assoc.c b/net/ieee80211/softmac/ieee80211softmac_assoc.c
index 5d90b9a6ee50..5e9a90651d04 100644
--- a/net/ieee80211/softmac/ieee80211softmac_assoc.c
+++ b/net/ieee80211/softmac/ieee80211softmac_assoc.c
@@ -164,12 +164,28 @@ network_matches_request(struct ieee80211softmac_device *mac, struct ieee80211_ne
 }
 
 static void
-ieee80211softmac_assoc_notify(struct net_device *dev, void *context)
+ieee80211softmac_assoc_notify_scan(struct net_device *dev, int event_type, void *context)
 {
         struct ieee80211softmac_device *mac = ieee80211_priv(dev);
         ieee80211softmac_assoc_work((void*)mac);
 }
 
+static void
+ieee80211softmac_assoc_notify_auth(struct net_device *dev, int event_type, void *context)
+{
+        struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+
+        switch (event_type) {
+        case IEEE80211SOFTMAC_EVENT_AUTHENTICATED:
+                ieee80211softmac_assoc_work((void*)mac);
+                break;
+        case IEEE80211SOFTMAC_EVENT_AUTH_FAILED:
+        case IEEE80211SOFTMAC_EVENT_AUTH_TIMEOUT:
+                ieee80211softmac_disassoc(mac);
+                break;
+        }
+}
+
 /* This function is called to handle userspace requests (asynchronously) */
 void
 ieee80211softmac_assoc_work(void *d)
@@ -249,7 +265,7 @@ ieee80211softmac_assoc_work(void *d)
                          * Maybe we can hope to have more memory after scanning finishes ;)
                          */
                         dprintk(KERN_INFO PFX "Associate: Scanning for networks first.\n");
-                        ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify, NULL);
+                        ieee80211softmac_notify(mac->dev, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, ieee80211softmac_assoc_notify_scan, NULL);
                         if (ieee80211softmac_start_scan(mac))
                                 dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
                         return;
@@ -284,7 +300,7 @@ ieee80211softmac_assoc_work(void *d)
                  * otherwise adding the notification would be racy. */
                 if (!ieee80211softmac_auth_req(mac, found)) {
                         dprintk(KERN_INFO PFX "cannot associate without being authenticated, requested authentication\n");
-                        ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify, NULL, GFP_KERNEL);
+                        ieee80211softmac_notify_internal(mac, IEEE80211SOFTMAC_EVENT_ANY, found, ieee80211softmac_assoc_notify_auth, NULL, GFP_KERNEL);
                 } else {
                         printkl(KERN_WARNING PFX "Not authenticated, but requesting authentication failed. Giving up to associate\n");
                         ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_FAILED, found);