[Bluetooth] Add security callback to the core

To give higher layers like RFCOMM the possibility to use the Bluetooth
security mechanisms, they need a way to get feedback from the HCI core 
layer when they succeeded or failed. This patch introduces a callback
structure that can be used for this kind of notification.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 46 insertions, 0 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 2c9995af03a8..4f859a899611 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -161,7 +161,9 @@ struct hci_conn {
 
 extern struct hci_proto *hci_proto[];
 extern struct list_head hci_dev_list;
+extern struct list_head hci_cb_list;
 extern rwlock_t hci_dev_list_lock;
+extern rwlock_t hci_cb_list_lock;
 
 /* ----- Inquiry cache ----- */
 #define INQUIRY_CACHE_AGE_MAX   (HZ*30)   // 30 seconds
@@ -491,6 +493,50 @@ static inline void hci_proto_encrypt_cfm(struct hci_conn *conn, __u8 status)
 
 int hci_register_proto(struct hci_proto *hproto);
 int hci_unregister_proto(struct hci_proto *hproto);
+
+/* ----- HCI callbacks ----- */
+struct hci_cb {
+	struct list_head list;
+
+	char *name;
+
+	void (*auth_cfm)	(struct hci_conn *conn, __u8 status);
+	void (*encrypt_cfm)	(struct hci_conn *conn, __u8 status, __u8 encrypt);
+};
+
+static inline void hci_auth_cfm(struct hci_conn *conn, __u8 status)
+{
+	struct list_head *p;
+
+	hci_proto_auth_cfm(conn, status);
+
+	read_lock_bh(&hci_cb_list_lock);
+	list_for_each(p, &hci_cb_list) {
+		struct hci_cb *cb = list_entry(p, struct hci_cb, list);
+		if (cb->auth_cfm)
+			cb->auth_cfm(conn, status);
+	}
+	read_unlock_bh(&hci_cb_list_lock);
+}
+
+static inline void hci_encrypt_cfm(struct hci_conn *conn, __u8 status, __u8 encrypt)
+{
+	struct list_head *p;
+
+	hci_proto_encrypt_cfm(conn, status);
+
+	read_lock_bh(&hci_cb_list_lock);
+	list_for_each(p, &hci_cb_list) {
+		struct hci_cb *cb = list_entry(p, struct hci_cb, list);
+		if (cb->encrypt_cfm)
+			cb->encrypt_cfm(conn, status, encrypt);
+	}
+	read_unlock_bh(&hci_cb_list_lock);
+}
+
+int hci_register_cb(struct hci_cb *hcb);
+int hci_unregister_cb(struct hci_cb *hcb);
+
 int hci_register_notifier(struct notifier_block *nb);
 int hci_unregister_notifier(struct notifier_block *nb);