qcacld-3.0: Add ini for station keepalive method

Add an ini item for configuring the keepalive method used by station
interfaces.

Change-Id: Id44773f5ae7f7ad1ad9441592512ab3e2ce3a076
CRs-Fixed: 2016799

core/hdd/inc/wlan_hdd_cfg.h

@@ -2537,6 +2537,43 @@ typedef enum {
 #define CFG_INFRA_STA_KEEP_ALIVE_PERIOD_MAX           (65535)
 #define CFG_INFRA_STA_KEEP_ALIVE_PERIOD_DEFAULT       (90)
 
+/**
+ * enum station_keepalive_method - available keepalive methods for stations
+ * @HDD_STA_KEEPALIVE_NULL_DATA: null data packet
+ * @HDD_STA_KEEPALIVE_GRAT_ARP: gratuitous ARP packet
+ * @HDD_STA_KEEPALIVE_COUNT: number of method options available
+ */
+enum station_keepalive_method {
+	HDD_STA_KEEPALIVE_NULL_DATA,
+	HDD_STA_KEEPALIVE_GRAT_ARP,
+	/* keep at the end */
+	HDD_STA_KEEPALIVE_COUNT
+};
+
+/*
+ * <ini>
+ * gStaKeepAliveMethod - Which keepalive method to use
+ * @Min: 0
+ * @Max: 1
+ * @Default: 1
+ *
+ * This ini determines which keepalive method to use for station interfaces
+ *       1) Use null data packets
+ *       2) Use gratuitous ARP packets
+ *
+ * Related: gStaKeepAlivePeriod, gApKeepAlivePeriod, gGoKeepAlivePeriod
+ *
+ * Supported Feature: STA, Keepalive
+ *
+ * Usage: Internal/External
+ *
+ * </ini>
+ */
+#define CFG_STA_KEEPALIVE_METHOD_NAME              "gStaKeepAliveMethod"
+#define CFG_STA_KEEPALIVE_METHOD_MIN               (HDD_STA_KEEPALIVE_NULL_DATA)
+#define CFG_STA_KEEPALIVE_METHOD_MAX               (HDD_STA_KEEPALIVE_COUNT - 1)
+#define CFG_STA_KEEPALIVE_METHOD_DEFAULT           (HDD_STA_KEEPALIVE_GRAT_ARP)
+
 /* WMM configuration */
 /*
  * <ini>
@@ -8852,6 +8889,7 @@ enum hdd_wext_control {
 #define CFG_EXTWOW_TCP_RX_TIMEOUT_DEFAULT          (200)
 #endif
 
+
 /*
  * Type declarations
  */
@@ -8901,6 +8939,7 @@ struct hdd_config {
 	uint8_t enableLTECoex;
 	uint32_t apKeepAlivePeriod;
 	uint32_t goKeepAlivePeriod;
+	enum station_keepalive_method sta_keepalive_method;
 	uint32_t apLinkMonitorPeriod;
 	uint32_t goLinkMonitorPeriod;
 	uint32_t nBeaconInterval;

core/hdd/src/wlan_hdd_cfg.c

@@ -1591,6 +1591,13 @@ REG_TABLE_ENTRY g_registry_table[] = {
 		     CFG_INFRA_STA_KEEP_ALIVE_PERIOD_MIN,
 		     CFG_INFRA_STA_KEEP_ALIVE_PERIOD_MAX),
 
+	REG_VARIABLE(CFG_STA_KEEPALIVE_METHOD_NAME, WLAN_PARAM_Integer,
+		     struct hdd_config, sta_keepalive_method,
+		     VAR_FLAGS_OPTIONAL | VAR_FLAGS_RANGE_CHECK_ASSUME_DEFAULT,
+		     CFG_STA_KEEPALIVE_METHOD_DEFAULT,
+		     CFG_STA_KEEPALIVE_METHOD_MIN,
+		     CFG_STA_KEEPALIVE_METHOD_MAX),
+
 	REG_VARIABLE(CFG_QOS_ADDTS_WHEN_ACM_IS_OFF_NAME, WLAN_PARAM_Integer,
 		     struct hdd_config, AddTSWhenACMIsOff,
 		     VAR_FLAGS_OPTIONAL | VAR_FLAGS_RANGE_CHECK_ASSUME_DEFAULT,

core/hdd/src/wlan_hdd_power.c

@@ -687,11 +687,18 @@ static int hdd_set_grat_arp_keepalive(hdd_adapter_t *adapter)
  */
 static void __hdd_ipv4_notifier_work_queue(struct work_struct *work)
 {
-	hdd_adapter_t *pAdapter =
-		container_of(work, hdd_adapter_t, ipv4NotifierWorkQueue);
+	hdd_adapter_t *adapter;
+	hdd_context_t *hdd_ctx;
+
 	ENTER();
-	hdd_enable_arp_offload(pAdapter, pmo_ipv4_change_notify);
-	hdd_set_grat_arp_keepalive(pAdapter);
+
+	adapter = container_of(work, hdd_adapter_t, ipv4NotifierWorkQueue);
+	hdd_enable_arp_offload(adapter, pmo_ipv4_change_notify);
+
+	hdd_ctx = WLAN_HDD_GET_CTX(adapter);
+	if (hdd_ctx->config->sta_keepalive_method == HDD_STA_KEEPALIVE_GRAT_ARP)
+		hdd_set_grat_arp_keepalive(adapter);
+
 	EXIT();
 }