[Bluetooth] Export details about authentication requirements

With the Simple Pairing support, the authentication requirements are
an explicit setting during the bonding process. Track and enforce the
requirements and allow higher layers like L2CAP and RFCOMM to increase
them if needed.

This patch introduces a new IOCTL that allows to query the current
authentication requirements. It is also possible to detect Simple
Pairing support in the kernel this way.

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

2 files changed, 16 insertions, 4 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 55576e8..3cc2949 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -72,8 +72,6 @@ enum {
 	HCI_INQUIRY,
 
 	HCI_RAW,
-
-	HCI_SECMGR
 };
 
 /* HCI ioctl defines */
@@ -86,6 +84,7 @@ enum {
 #define HCIGETDEVINFO	_IOR('H', 211, int)
 #define HCIGETCONNLIST	_IOR('H', 212, int)
 #define HCIGETCONNINFO	_IOR('H', 213, int)
+#define HCIGETAUTHINFO	_IOR('H', 215, int)
 
 #define HCISETRAW	_IOW('H', 220, int)
 #define HCISETSCAN	_IOW('H', 221, int)
@@ -97,8 +96,6 @@ enum {
 #define HCISETACLMTU	_IOW('H', 227, int)
 #define HCISETSCOMTU	_IOW('H', 228, int)
 
-#define HCISETSECMGR	_IOW('H', 230, int)
-
 #define HCIINQUIRY	_IOR('H', 240, int)
 
 /* HCI timeouts */
@@ -203,6 +200,14 @@ enum {
 #define HCI_LM_RELIABLE	0x0010
 #define HCI_LM_SECURE	0x0020
 
+/* Authentication types */
+#define HCI_AT_NO_BONDING		0x00
+#define HCI_AT_NO_BONDING_MITM		0x01
+#define HCI_AT_DEDICATED_BONDING	0x02
+#define HCI_AT_DEDICATED_BONDING_MITM	0x03
+#define HCI_AT_GENERAL_BONDING		0x04
+#define HCI_AT_GENERAL_BONDING_MITM	0x05
+
 /* -----  HCI Commands ---- */
 #define HCI_OP_INQUIRY			0x0401
 struct hci_cp_inquiry {
@@ -1001,6 +1006,11 @@ struct hci_conn_info_req {
 	struct   hci_conn_info conn_info[0];
 };
 
+struct hci_auth_info_req {
+	bdaddr_t bdaddr;
+	__u8     type;
+};
+
 struct hci_inquiry_req {
 	__u16 dev_id;
 	__u16 flags;
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 28fbd0c..cbf7510 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -168,6 +168,7 @@ struct hci_conn {
 	__u16            pkt_type;
 	__u16            link_policy;
 	__u32		 link_mode;
+	__u8             auth_type;
 	__u8             power_save;
 	unsigned long	 pend;
 
@@ -422,6 +423,7 @@ int hci_get_dev_list(void __user *arg);
 int hci_get_dev_info(void __user *arg);
 int hci_get_conn_list(void __user *arg);
 int hci_get_conn_info(struct hci_dev *hdev, void __user *arg);
+int hci_get_auth_info(struct hci_dev *hdev, void __user *arg);
 int hci_inquiry(void __user *arg);
 
 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);