1 files changed, 96 insertions, 21 deletions

diff --git a/net/ieee80211/softmac/ieee80211softmac_module.c b/net/ieee80211/softmac/ieee80211softmac_module.c
index 6252be2c0db9..4b2e57d12418 100644
--- a/net/ieee80211/softmac/ieee80211softmac_module.c
+++ b/net/ieee80211/softmac/ieee80211softmac_module.c
@@ -26,6 +26,7 @@
 
 #include "ieee80211softmac_priv.h"
 #include <linux/sort.h>
+#include <linux/etherdevice.h>
 
 struct net_device *alloc_ieee80211softmac(int sizeof_priv)
 {
@@ -61,14 +62,6 @@ struct net_device *alloc_ieee80211softmac(int sizeof_priv)
         softmac->wait_for_scan = ieee80211softmac_wait_for_scan_implementation;
         softmac->stop_scan = ieee80211softmac_stop_scan_implementation;
 
-        //TODO: The mcast rate has to be assigned dynamically somewhere (in scanning, association. Not sure...)
-        //      It has to be set to the highest rate all stations in the current network can handle.
-        softmac->txrates.mcast_rate = IEEE80211_CCK_RATE_1MB;
-        softmac->txrates.mcast_fallback = IEEE80211_CCK_RATE_1MB;
-        /* This is reassigned in ieee80211softmac_start to sane values. */
-        softmac->txrates.default_rate = IEEE80211_CCK_RATE_1MB;
-        softmac->txrates.default_fallback = IEEE80211_CCK_RATE_1MB;
-
         /* to start with, we can't send anything ... */
         netif_carrier_off(dev);
         
@@ -170,15 +163,82 @@ static void ieee80211softmac_start_check_rates(struct ieee80211softmac_device *m
         }
 }
 
-void ieee80211softmac_start(struct net_device *dev)
+int ieee80211softmac_ratesinfo_rate_supported(struct ieee80211softmac_ratesinfo *ri, u8 rate)
+{
+        int search;
+        u8 search_rate;
+
+        for (search = 0; search < ri->count; search++) {
+                search_rate = ri->rates[search];
+                search_rate &= ~IEEE80211_BASIC_RATE_MASK;
+                if (rate == search_rate)
+                        return 1;
+        }
+
+        return 0;
+}
+
+/* Finds the highest rate which is:
+ *  1. Present in ri (optionally a basic rate)
+ *  2. Supported by the device
+ *  3. Less than or equal to the user-defined rate
+ */
+static u8 highest_supported_rate(struct ieee80211softmac_device *mac,
+        struct ieee80211softmac_ratesinfo *ri, int basic_only)
+{
+        u8 user_rate = mac->txrates.user_rate;
+        int i;
+
+        if (ri->count == 0) {
+                dprintk(KERN_ERR PFX "empty ratesinfo?\n");
+                return IEEE80211_CCK_RATE_1MB;
+        }
+
+        for (i = ri->count - 1; i >= 0; i--) {
+                u8 rate = ri->rates[i];
+                if (basic_only && !(rate & IEEE80211_BASIC_RATE_MASK))
+                        continue;
+                rate &= ~IEEE80211_BASIC_RATE_MASK;
+                if (rate > user_rate)
+                        continue;
+                if (ieee80211softmac_ratesinfo_rate_supported(&mac->ratesinfo, rate))
+                        return rate;
+        }
+
+        /* If we haven't found a suitable rate by now, just trust the user */
+        return user_rate;
+}
+
+void ieee80211softmac_recalc_txrates(struct ieee80211softmac_device *mac)
+{
+        struct ieee80211softmac_txrates *txrates = &mac->txrates;
+        struct ieee80211softmac_txrates oldrates;
+        u32 change = 0;
+
+        if (mac->txrates_change)
+                oldrates = mac->txrates;
+
+        change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
+        txrates->default_rate = highest_supported_rate(mac, &mac->associnfo.supported_rates, 0);
+
+        change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+        txrates->default_fallback = lower_rate(mac, txrates->default_rate);
+
+        change |= IEEE80211SOFTMAC_TXRATECHG_MCAST;
+        txrates->mcast_rate = highest_supported_rate(mac, &mac->associnfo.supported_rates, 1);
+
+        if (mac->txrates_change)
+                mac->txrates_change(mac->dev, change, &oldrates);
+
+}
+
+void ieee80211softmac_init_txrates(struct ieee80211softmac_device *mac)
 {
-        struct ieee80211softmac_device *mac = ieee80211_priv(dev);
         struct ieee80211_device *ieee = mac->ieee;
         u32 change = 0;
+        struct ieee80211softmac_txrates *txrates = &mac->txrates;
         struct ieee80211softmac_txrates oldrates;
 
-        ieee80211softmac_start_check_rates(mac);
-
         /* TODO: We need some kind of state machine to lower the default rates
          *       if we loose too many packets.
          */
@@ -193,22 +253,37 @@ void ieee80211softmac_start(struct net_device *dev)
            more reliable. Note similar logic in
            ieee80211softmac_wx_set_rate() */     
         if (ieee->modulation & IEEE80211_CCK_MODULATION) {
-                mac->txrates.default_rate = IEEE80211_CCK_RATE_11MB;
-                change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
-                mac->txrates.default_fallback = IEEE80211_CCK_RATE_5MB;
-                change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+                txrates->user_rate = IEEE80211_CCK_RATE_11MB;
         } else if (ieee->modulation & IEEE80211_OFDM_MODULATION) {
-                mac->txrates.default_rate = IEEE80211_OFDM_RATE_54MB;
-                change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
-                mac->txrates.default_fallback = IEEE80211_OFDM_RATE_24MB;
-                change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+                txrates->user_rate = IEEE80211_OFDM_RATE_54MB;
         } else
                 assert(0);
+
+        txrates->default_rate = IEEE80211_CCK_RATE_1MB;
+        change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT;
+
+        txrates->default_fallback = IEEE80211_CCK_RATE_1MB;
+        change |= IEEE80211SOFTMAC_TXRATECHG_DEFAULT_FBACK;
+
+        txrates->mcast_rate = IEEE80211_CCK_RATE_1MB;
+        change |= IEEE80211SOFTMAC_TXRATECHG_MCAST;
+
+        txrates->mgt_mcast_rate = IEEE80211_CCK_RATE_1MB;
+        change |= IEEE80211SOFTMAC_TXRATECHG_MGT_MCAST;
+
         if (mac->txrates_change)
-                mac->txrates_change(dev, change, &oldrates);
+                mac->txrates_change(mac->dev, change, &oldrates);
 
         mac->running = 1;
 }
+
+void ieee80211softmac_start(struct net_device *dev)
+{
+        struct ieee80211softmac_device *mac = ieee80211_priv(dev);
+
+        ieee80211softmac_start_check_rates(mac);
+        ieee80211softmac_init_txrates(mac);
+}
 EXPORT_SYMBOL_GPL(ieee80211softmac_start);
 
 void ieee80211softmac_stop(struct net_device *dev)