Changeset 3314 for madwifi/trunk/net80211/ieee80211_var.h

Timestamp:

01/31/08 00:50:16 (4 years ago)

Author:

mtaylor

Message:

This patch adds iwpriv values for setting the
time in ms, or the number of beacons for the
beacon miss alarm. If we haven't had a beacon
in this period, the alarm is sounded and
action (i.e. roaming) is taken.

This patch changes the storage of the beacon
miss threshold to integral beacon count but
corrects the previous intent.

The default beacon miss alarm is going to be
850ms which is half way between the two hard
coded limits that were there before.

The old hard coded limits assumed that the
beacon interval was 100ms and set the limit to
10 (1000ms) for software beacon miss timer
and 7 for hardware beacon miss timer.

The new default is 850ms (the midpoint between
the two previous defaults). This value is rounded
up to the next nearest beacon interval.

There is no upper bound on the beacon miss
threshold specified, since it may need to be
wildly inflated with 25ms beacon interval, or
wildly reduced with 1000ms beacon interval.

The minimum is still 2 beacons, regardless of
the beacon interval.

Files:

• madwifi/trunk/net80211/ieee80211_var.h (modified) (4 diffs)

madwifi/trunk/net80211/ieee80211_var.h

@@ -55 +55 @@
- *   a value range from 0 to 127.
- */
-127    
-0      
-
-15     
-1      
-1      
-
-1000   
-25     
-100  
+       127
+       0
+
+       15
+       1
+       1
+
+       1000
+       25
+     100
-#define IEEE80211_BINTVAL_VALID(_bi) \
-        ((IEEE80211_BINTVAL_MIN <= (_bi)) && \
@@ -72 +72 @@
-         (_bi) : IEEE80211_BINTVAL_DEFAULT)
-
+#define IEEE80211_BMISSTHRESH_BMIN      2       /* min bmiss threshold (beacons) */
+/* Default beacon miss threshold is set to roundup from 850ms 
+ * This is halfway between the 10@100ms default from prior hardcoded setting for
+ * software beacon miss timers, and the 7@100ms default from prior hardcoded 
+ * timer value for hardware beacon miss timer.
+ * Based upon emperical evidence and practices of commercial vendors, I believe
+ * this should really be 2500ms by default. */
+#define IEEE80211_BMISSTHRESH_DEFAULT_MS 850
+
+#define IEEE80211_BMISSTHRESH_VALID(_bmt) \
+        (IEEE80211_BMISSTHRESH_BMIN <= (_bmt))
+#define IEEE80211_BMISSTHRESH_SANITISE(_bmt) \
+        ((IEEE80211_BMISSTHRESH_BMIN > (_bmt)) ? \
+         IEEE80211_BMISSTHRESH_BMIN : (_bmt))
+
-#define IEEE80211_BGSCAN_INTVAL_MIN     15      /* min bg scan intvl (secs) */
-#define IEEE80211_BGSCAN_INTVAL_DEFAULT (5*60)  /* default bg scan intvl */
@@ -89 +104 @@
-
-#define IEEE80211_FIXED_RATE_NONE       -1
-
-#define IEEE80211_SWBMISS_THRESHOLD     10      /* software beacon miss threshold, in TUs */
-
-#define DEV_NAME(_d) \
@@ -304 +317 @@
-        u_int16_t ic_lintval;                   /* beacon interval */
-        u_int16_t ic_holdover;                  /* PM hold over duration */
-imeout;             /* beacon miss threshold (m
+hreshold;           /* beacon miss threshold (# beacon
-        unsigned long ic_bmiss_guard;           /* when to cease ignoring bmiss (jiffies) */
-        u_int16_t ic_txpowlimit;                /* global tx power limit (in 0.5 dBm) */