[PATCH] softmac: fix SIOCSIWAP

There are some bugs in the current implementation of the SIOCSIWAP wext,
for example that when you do it twice and it fails, it may still try
another access point for some reason. This patch fixes this by introducing
a new flag that tells the association code that the bssid that is in use
was fixed by the user and shouldn't be deviated from.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 4 deletions

diff --git a/net/ieee80211/softmac/ieee80211softmac_assoc.c b/net/ieee80211/softmac/ieee80211softmac_assoc.c
index 4498023841dc..fb79ce7d6439 100644
--- a/net/ieee80211/softmac/ieee80211softmac_assoc.c
+++ b/net/ieee80211/softmac/ieee80211softmac_assoc.c
@@ -144,6 +144,12 @@ network_matches_request(struct ieee80211softmac_device *mac, struct ieee80211_ne
         if (!we_support_all_basic_rates(mac, net->rates_ex, net->rates_ex_len))
                 return 0;
 
+        /* assume that users know what they're doing ...
+         * (note we don't let them select a net we're incompatible with) */
+        if (mac->associnfo.bssfixed) {
+                return !memcmp(mac->associnfo.bssid, net->bssid, ETH_ALEN);
+        }
+
         /* if 'ANY' network requested, take any that doesn't have privacy enabled */
         if (mac->associnfo.req_essid.len == 0 
             && !(net->capability & WLAN_CAPABILITY_PRIVACY))
@@ -176,7 +182,7 @@ ieee80211softmac_assoc_work(void *d)
                 ieee80211softmac_disassoc(mac, WLAN_REASON_DISASSOC_STA_HAS_LEFT);
 
         /* try to find the requested network in our list, if we found one already */
-        if (mac->associnfo.bssvalid)
+        if (mac->associnfo.bssvalid || mac->associnfo.bssfixed)
                 found = ieee80211softmac_get_network_by_bssid(mac, mac->associnfo.bssid);       
         
         /* Search the ieee80211 networks for this network if we didn't find it by bssid,
@@ -241,19 +247,25 @@ ieee80211softmac_assoc_work(void *d)
                         if (ieee80211softmac_start_scan(mac))
                                 dprintk(KERN_INFO PFX "Associate: failed to initiate scan. Is device up?\n");
                         return;
-                }
-                else {
+                } else {
                         spin_lock_irqsave(&mac->lock, flags);
                         mac->associnfo.associating = 0;
                         mac->associated = 0;
                         spin_unlock_irqrestore(&mac->lock, flags);
 
                         dprintk(KERN_INFO PFX "Unable to find matching network after scan!\n");
+                        /* reset the retry counter for the next user request since we
+                         * break out and don't reschedule ourselves after this point. */
+                        mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
                         ieee80211softmac_call_events(mac, IEEE80211SOFTMAC_EVENT_ASSOCIATE_NET_NOT_FOUND, NULL);
                         return;
                 }
         }
-        
+
+        /* reset the retry counter for the next user request since we
+         * now found a net and will try to associate to it, but not
+         * schedule this function again. */
+        mac->associnfo.scan_retry = IEEE80211SOFTMAC_ASSOC_SCAN_RETRY_LIMIT;
         mac->associnfo.bssvalid = 1;
         memcpy(mac->associnfo.bssid, found->bssid, ETH_ALEN);
         /* copy the ESSID for displaying it */