cfg80211: add add_nan_func / del_nan_func

A NAN function can be either publish, subscribe or follow
up. Make all the necessary verifications and just pass the
request to the driver.
Allow the user space application that starts NAN to
forbid any other socket to add or remove functions.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 91 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 9898e1f883e2..2f35ccf6da83 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2327,6 +2327,73 @@ struct cfg80211_nan_conf {
 };
 
 /**
+ * struct cfg80211_nan_func_filter - a NAN function Rx / Tx filter
+ *
+ * @filter: the content of the filter
+ * @len: the length of the filter
+ */
+struct cfg80211_nan_func_filter {
+	const u8 *filter;
+	u8 len;
+};
+
+/**
+ * struct cfg80211_nan_func - a NAN function
+ *
+ * @type: &enum nl80211_nan_function_type
+ * @service_id: the service ID of the function
+ * @publish_type: &nl80211_nan_publish_type
+ * @close_range: if true, the range should be limited. Threshold is
+ *	implementation specific.
+ * @publish_bcast: if true, the solicited publish should be broadcasted
+ * @subscribe_active: if true, the subscribe is active
+ * @followup_id: the instance ID for follow up
+ * @followup_reqid: the requestor instance ID for follow up
+ * @followup_dest: MAC address of the recipient of the follow up
+ * @ttl: time to live counter in DW.
+ * @serv_spec_info: Service Specific Info
+ * @serv_spec_info_len: Service Specific Info length
+ * @srf_include: if true, SRF is inclusive
+ * @srf_bf: Bloom Filter
+ * @srf_bf_len: Bloom Filter length
+ * @srf_bf_idx: Bloom Filter index
+ * @srf_macs: SRF MAC addresses
+ * @srf_num_macs: number of MAC addresses in SRF
+ * @rx_filters: rx filters that are matched with corresponding peer's tx_filter
+ * @tx_filters: filters that should be transmitted in the SDF.
+ * @num_rx_filters: length of &rx_filters.
+ * @num_tx_filters: length of &tx_filters.
+ * @instance_id: driver allocated id of the function.
+ * @cookie: unique NAN function identifier.
+ */
+struct cfg80211_nan_func {
+	enum nl80211_nan_function_type type;
+	u8 service_id[NL80211_NAN_FUNC_SERVICE_ID_LEN];
+	u8 publish_type;
+	bool close_range;
+	bool publish_bcast;
+	bool subscribe_active;
+	u8 followup_id;
+	u8 followup_reqid;
+	struct mac_address followup_dest;
+	u32 ttl;
+	const u8 *serv_spec_info;
+	u8 serv_spec_info_len;
+	bool srf_include;
+	const u8 *srf_bf;
+	u8 srf_bf_len;
+	u8 srf_bf_idx;
+	struct mac_address *srf_macs;
+	int srf_num_macs;
+	struct cfg80211_nan_func_filter *rx_filters;
+	struct cfg80211_nan_func_filter *tx_filters;
+	u8 num_tx_filters;
+	u8 num_rx_filters;
+	u8 instance_id;
+	u64 cookie;
+};
+
+/**
  * struct cfg80211_ops - backend description for wireless configuration
  *
  * This struct is registered by fullmac card drivers and/or wireless stacks
@@ -2616,6 +2683,14 @@ struct cfg80211_nan_conf {
  *	peers must be on the base channel when the call completes.
  * @start_nan: Start the NAN interface.
  * @stop_nan: Stop the NAN interface.
+ * @add_nan_func: Add a NAN function. Returns negative value on failure.
+ *	On success @nan_func ownership is transferred to the driver and
+ *	it may access it outside of the scope of this function. The driver
+ *	should free the @nan_func when no longer needed by calling
+ *	cfg80211_free_nan_func().
+ *	On success the driver should assign an instance_id in the
+ *	provided @nan_func.
+ * @del_nan_func: Delete a NAN function.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -2884,6 +2959,10 @@ struct cfg80211_ops {
 	int	(*start_nan)(struct wiphy *wiphy, struct wireless_dev *wdev,
 			     struct cfg80211_nan_conf *conf);
 	void	(*stop_nan)(struct wiphy *wiphy, struct wireless_dev *wdev);
+	int	(*add_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev,
+				struct cfg80211_nan_func *nan_func);
+	void	(*del_nan_func)(struct wiphy *wiphy, struct wireless_dev *wdev,
+			       u64 cookie);
 };
 
 /*
@@ -3335,6 +3414,8 @@ struct wiphy_iftype_ext_capab {
  * @bss_select_support: bitmask indicating the BSS selection criteria supported
  *	by the driver in the .connect() callback. The bit position maps to the
  *	attribute indices defined in &enum nl80211_bss_select_attr.
+ *
+ * @cookie_counter: unique generic cookie counter, used to identify objects.
  */
 struct wiphy {
 	/* assign these fields before you register the wiphy */
@@ -3464,6 +3545,8 @@ struct wiphy {
 
 	u32 bss_select_support;
 
+	u64 cookie_counter;
+
 	char priv[0] __aligned(NETDEV_ALIGN);
 };
 
@@ -5584,6 +5667,14 @@ wiphy_ext_feature_isset(struct wiphy *wiphy,
 	return (ft_byte & BIT(ftidx % 8)) != 0;
 }
 
+/**
+ * cfg80211_free_nan_func - free NAN function
+ * @f: NAN function that should be freed
+ *
+ * Frees all the NAN function and all it's allocated members.
+ */
+void cfg80211_free_nan_func(struct cfg80211_nan_func *f);
+
 /* ethtool helper */
 void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);