madwifi: add iwpriv for setting the maximum number of associated clients (ap mode)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13207 3c298f89-4303-0410-b956-a3cf2f4a3e73

3 files changed, 88 insertions, 3 deletions

diff --git a/package/madwifi/patches/387-maxassoc.patch b/package/madwifi/patches/387-maxassoc.patch
new file mode 100644
index 000000000..1dc788e7d
--- /dev/null
+++ b/package/madwifi/patches/387-maxassoc.patch
@@ -0,0 +1,85 @@
+--- a/net80211/ieee80211_var.h
++++ b/net80211/ieee80211_var.h
+@@ -198,6 +198,7 @@ struct ieee80211vap {
+ 	u_int32_t iv_debug;				/* debug msg flags */
+ 	struct ieee80211_stats iv_stats;		/* statistics */
+ 
++	int iv_max_nodes;
+ 	int iv_monitor_nods_only;			/* in monitor mode only nods traffic */
+ 	int iv_monitor_txf_len;				/* in monitor mode, truncate tx packets */
+ 	int iv_monitor_phy_errors;			/* in monitor mode, accept phy errors */
+--- a/net80211/ieee80211_ioctl.h
++++ b/net80211/ieee80211_ioctl.h
+@@ -650,6 +650,7 @@ enum {
+ 	IEEE80211_PARAM_RSSI_DIS_THR	= 80,	/* rssi threshold for disconnection */
+ 	IEEE80211_PARAM_RSSI_DIS_COUNT	= 81,	/* counter for rssi threshold */
+ 	IEEE80211_PARAM_WDS_SEP			= 82,	/* move wds stations into separate interfaces */
++	IEEE80211_PARAM_MAXASSOC		= 83,	/* maximum associated stations */
+ };
+ 
+ #define	SIOCG80211STATS			(SIOCDEVPRIVATE+2)
+--- a/net80211/ieee80211_wireless.c
++++ b/net80211/ieee80211_wireless.c
+@@ -2875,6 +2875,12 @@ ieee80211_ioctl_setparam(struct net_devi
+ 		else
+ 			vap->iv_flags_ext &= ~IEEE80211_FEXT_WDSSEP;
+ 		break;
++	case IEEE80211_PARAM_MAXASSOC:
++		if (vap->iv_opmode != IEEE80211_M_HOSTAP)
++			retv = -EINVAL;
++		else
++			vap->iv_max_nodes = value;
++		break;
+ #ifdef ATH_REVERSE_ENGINEERING
+ 	case IEEE80211_PARAM_DUMPREGS:
+ 		ieee80211_dump_registers(dev, info, w, extra);
+@@ -3234,6 +3240,9 @@ ieee80211_ioctl_getparam(struct net_devi
+ 	case IEEE80211_PARAM_WDS_SEP:
+ 		param[0] = !!(vap->iv_flags_ext & IEEE80211_FEXT_WDSSEP);
+ 		break;
++	case IEEE80211_PARAM_MAXASSOC:
++		param[0] = vap->iv_max_nodes;
++		break;
+ 	default:
+ 		return -EOPNOTSUPP;
+ 	}
+@@ -5789,6 +5798,10 @@ static const struct iw_priv_args ieee802
+ 	 IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "wdssep"},
+ 	{ IEEE80211_PARAM_WDS_SEP,
+ 	 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_wdssep"},
++	{ IEEE80211_PARAM_MAXASSOC,
++	 IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "maxassoc"},
++	{ IEEE80211_PARAM_MAXASSOC,
++	 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_maxassoc"},
+ 
+ #ifdef ATH_REVERSE_ENGINEERING
+ 	/*
+--- a/net80211/ieee80211_input.c
++++ b/net80211/ieee80211_input.c
+@@ -4017,7 +4017,26 @@ ieee80211_recv_mgmt(struct ieee80211vap 
+ 			vap->iv_stats.is_rx_assoc_norate++;
+ 			return;
+ 		}
++		if (vap->iv_max_nodes > 0) {
++			unsigned int active_nodes = 0;
++			struct ieee80211_node *tni;
++
++			IEEE80211_NODE_TABLE_LOCK_IRQ(&ic->ic_sta);
++			TAILQ_FOREACH(tni, &ic->ic_sta.nt_node, ni_list) {
++				if (tni->ni_vap != vap)
++					continue;
++				if (tni->ni_associd == 0)
++					continue;
++				active_nodes++;
++			}
++			IEEE80211_NODE_TABLE_UNLOCK_IRQ(&ic->ic_sta);
+ 
++			if (active_nodes >= vap->iv_max_nodes) {
++				/* too many nodes connected */
++				ieee80211_node_leave(ni);
++				return;
++			}
++		}
+ 		if (ni->ni_associd != 0 &&
+ 		    IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan)) {
+ 			if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)
diff --git a/package/madwifi/patches/401-changeset_r3602.patch b/package/madwifi/patches/401-changeset_r3602.patch
index 0b31d6e57..2a235e0cf 100644
--- a/package/madwifi/patches/401-changeset_r3602.patch
+++ b/package/madwifi/patches/401-changeset_r3602.patch
@@ -1,6 +1,6 @@
 --- a/net80211/ieee80211_linux.h
 +++ b/net80211/ieee80211_linux.h
-@@ -341,6 +341,8 @@ typedef spinlock_t acl_lock_t;
+@@ -340,6 +340,8 @@ typedef spinlock_t acl_lock_t;
  /* __skb_append got a third parameter in 2.6.14 */
  #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
  #define __skb_append(a,b,c)	__skb_append(a, b)
diff --git a/package/madwifi/patches/403-changeset_r3605.patch b/package/madwifi/patches/403-changeset_r3605.patch
index 2cf28d737..4c2cd27f0 100644
--- a/package/madwifi/patches/403-changeset_r3605.patch
+++ b/package/madwifi/patches/403-changeset_r3605.patch
@@ -16,7 +16,7 @@
  #endif /* _ATH_COMPAT_H_ */
 --- a/net80211/ieee80211_linux.h
 +++ b/net80211/ieee80211_linux.h
-@@ -338,13 +338,6 @@ typedef spinlock_t acl_lock_t;
+@@ -337,13 +337,6 @@ typedef spinlock_t acl_lock_t;
  #define	ACL_LOCK_CHECK(_as)
  #endif
  
@@ -30,7 +30,7 @@
  /*
   * Per-node power-save queue definitions.  Beware of control
   * flow with IEEE80211_NODE_SAVEQ_LOCK/IEEE80211_NODE_SAVEQ_UNLOCK.
-@@ -388,16 +381,16 @@ typedef spinlock_t acl_lock_t;
+@@ -387,16 +380,16 @@ typedef spinlock_t acl_lock_t;
  	_skb = __skb_dequeue(&(_ni)->ni_savedq);		\
  	(_qlen) = skb_queue_len(&(_ni)->ni_savedq);		\
  } while (0)