[PATCH] ieee80211: small ERP handling additions

This adds a flag to the ieee80211_network structure which indicates whether
the stored erp_value is valid (a check against 0 is not enough, since an ERP
of 0 is valid and very meaningful).

I also added the ERP IE bit-definitions to ieee80211.h.

This is needed by some upcoming softmac patches.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/net/ieee80211.h

@@ -240,6 +240,11 @@ struct ieee80211_snap_hdr {
 #define WLAN_CAPABILITY_SHORT_SLOT_TIME (1<<10)
 #define WLAN_CAPABILITY_DSSS_OFDM (1<<13)
 
+/* 802.11g ERP information element */
+#define WLAN_ERP_NON_ERP_PRESENT (1<<0)
+#define WLAN_ERP_USE_PROTECTION (1<<1)
+#define WLAN_ERP_BARKER_PREAMBLE (1<<2)
+
 /* Status codes */
 enum ieee80211_statuscode {
 	WLAN_STATUS_SUCCESS = 0,
@@ -747,6 +752,8 @@ struct ieee80211_txb {
 #define NETWORK_HAS_IBSS_DFS            (1<<8)
 #define NETWORK_HAS_TPC_REPORT          (1<<9)
 
+#define NETWORK_HAS_ERP_VALUE           (1<<10)
+
 #define QOS_QUEUE_NUM                   4
 #define QOS_OUI_LEN                     3
 #define QOS_OUI_TYPE                    2

net/ieee80211/ieee80211_rx.c

@@ -1166,6 +1166,7 @@ static int ieee80211_parse_info_param(struct ieee80211_info_element
 
 		case MFIE_TYPE_ERP_INFO:
 			network->erp_value = info_element->data[0];
+			network->flags |= NETWORK_HAS_ERP_VALUE;
 			IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
 					     network->erp_value);
 			break;