[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>
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 97dba0d..d63d430 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -2399,6 +2399,7 @@
COMPATIBLE_IOCTL(HCIGETDEVINFO)
COMPATIBLE_IOCTL(HCIGETCONNLIST)
COMPATIBLE_IOCTL(HCIGETCONNINFO)
+COMPATIBLE_IOCTL(HCIGETAUTHINFO)
COMPATIBLE_IOCTL(HCISETRAW)
COMPATIBLE_IOCTL(HCISETSCAN)
COMPATIBLE_IOCTL(HCISETAUTH)
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 @@
HCI_INQUIRY,
HCI_RAW,
-
- HCI_SECMGR
};
/* HCI ioctl defines */
@@ -86,6 +84,7 @@
#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 @@
#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 @@
#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 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 @@
__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_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);
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 6f22533..0d4b8ae 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -379,13 +379,21 @@
{
BT_DBG("conn %p", conn);
+ if (conn->ssp_mode > 0 && conn->hdev->ssp_mode > 0) {
+ if (!(conn->auth_type & 0x01)) {
+ conn->auth_type = HCI_AT_GENERAL_BONDING_MITM;
+ conn->link_mode &= ~HCI_LM_AUTH;
+ }
+ }
+
if (conn->link_mode & HCI_LM_AUTH)
return 1;
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
struct hci_cp_auth_requested cp;
cp.handle = cpu_to_le16(conn->handle);
- hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
+ hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
+ sizeof(cp), &cp);
}
return 0;
}
@@ -397,7 +405,7 @@
BT_DBG("conn %p", conn);
if (conn->link_mode & HCI_LM_ENCRYPT)
- return 1;
+ return hci_conn_auth(conn);
if (test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->pend))
return 0;
@@ -406,7 +414,8 @@
struct hci_cp_set_conn_encrypt cp;
cp.handle = cpu_to_le16(conn->handle);
cp.encrypt = 1;
- hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp), &cp);
+ hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT,
+ sizeof(cp), &cp);
}
return 0;
}
@@ -420,7 +429,8 @@
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->pend)) {
struct hci_cp_change_conn_link_key cp;
cp.handle = cpu_to_le16(conn->handle);
- hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY, sizeof(cp), &cp);
+ hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
+ sizeof(cp), &cp);
}
return 0;
}
@@ -624,3 +634,23 @@
return copy_to_user(ptr, &ci, sizeof(ci)) ? -EFAULT : 0;
}
+
+int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
+{
+ struct hci_auth_info_req req;
+ struct hci_conn *conn;
+
+ if (copy_from_user(&req, arg, sizeof(req)))
+ return -EFAULT;
+
+ hci_dev_lock_bh(hdev);
+ conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &req.bdaddr);
+ if (conn)
+ req.type = conn->auth_type;
+ hci_dev_unlock_bh(hdev);
+
+ if (!conn)
+ return -ENOENT;
+
+ return copy_to_user(arg, &req, sizeof(req)) ? -EFAULT : 0;
+}
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 747fabd..d62579b 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -193,19 +193,11 @@
return 0;
- case HCISETSECMGR:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
-
- if (arg)
- set_bit(HCI_SECMGR, &hdev->flags);
- else
- clear_bit(HCI_SECMGR, &hdev->flags);
-
- return 0;
-
case HCIGETCONNINFO:
- return hci_get_conn_info(hdev, (void __user *)arg);
+ return hci_get_conn_info(hdev, (void __user *) arg);
+
+ case HCIGETAUTHINFO:
+ return hci_get_auth_info(hdev, (void __user *) arg);
default:
if (hdev->ioctl)
@@ -217,7 +209,7 @@
static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
- void __user *argp = (void __user *)arg;
+ void __user *argp = (void __user *) arg;
int err;
BT_DBG("cmd %x arg %lx", cmd, arg);
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 2522640..30ad59b 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -2150,7 +2150,7 @@
static int l2cap_auth_cfm(struct hci_conn *hcon, u8 status)
{
struct l2cap_chan_list *l;
- struct l2cap_conn *conn = conn = hcon->l2cap_data;
+ struct l2cap_conn *conn = hcon->l2cap_data;
struct l2cap_conn_rsp rsp;
struct sock *sk;
int result;
@@ -2165,11 +2165,17 @@
read_lock(&l->lock);
for (sk = l->head; sk; sk = l2cap_pi(sk)->next_c) {
+ struct l2cap_pinfo *pi = l2cap_pi(sk);
+
bh_lock_sock(sk);
- if (sk->sk_state != BT_CONNECT2 ||
- (l2cap_pi(sk)->link_mode & L2CAP_LM_ENCRYPT) ||
- (l2cap_pi(sk)->link_mode & L2CAP_LM_SECURE)) {
+ if (sk->sk_state != BT_CONNECT2) {
+ bh_unlock_sock(sk);
+ continue;
+ }
+
+ if ((pi->link_mode & (L2CAP_LM_ENCRYPT | L2CAP_LM_SECURE)) &&
+ !(hcon->link_mode & HCI_LM_ENCRYPT)) {
bh_unlock_sock(sk);
continue;
}
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index e7a6a03..e56bcfc 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -1969,7 +1969,8 @@
list_for_each_safe(p, n, &s->dlcs) {
d = list_entry(p, struct rfcomm_dlc, list);
- if (d->link_mode & (RFCOMM_LM_ENCRYPT | RFCOMM_LM_SECURE))
+ if ((d->link_mode & (RFCOMM_LM_ENCRYPT | RFCOMM_LM_SECURE)) &&
+ !(conn->link_mode & HCI_LM_ENCRYPT) && !status)
continue;
if (!test_and_clear_bit(RFCOMM_AUTH_PENDING, &d->flags))