Bluetooth: Add support for connect failed management event

This patch add a new connect failed management event to track failures
in connecting to remote devices. It is particularly useful for security
mode 3 scenarios when we don't have a connected state while pairing but
still need to detect when the connect attempt failed.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

4 files changed, 23 insertions, 1 deletions

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 2197a099a2b7..45caae62cb8e 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -717,6 +717,7 @@ int mgmt_new_key(u16 index, struct link_key *key, u8 old_key_type);
 int mgmt_connected(u16 index, bdaddr_t *bdaddr);
 int mgmt_disconnected(u16 index, bdaddr_t *bdaddr);
 int mgmt_disconnect_failed(u16 index);
+int mgmt_connect_failed(u16 index, bdaddr_t *bdaddr, u8 status);
 
 /* HCI info for socket */
 #define hci_pi(sk) ((struct hci_pinfo *) sk)
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index 2c47601b6e63..1d822f2c0f1a 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -184,3 +184,10 @@ struct mgmt_ev_disconnected {
         __le16 index;
         bdaddr_t bdaddr;
 } __packed;
+
+#define MGMT_EV_CONNECT_FAILED          0x000D
+struct mgmt_ev_connect_failed {
+        __le16 index;
+        bdaddr_t bdaddr;
+        __u8 status;
+} __packed;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 335c60bad96c..995ae6c17f11 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1166,8 +1166,11 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
                         hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE,
                                                         sizeof(cp), &cp);
                 }
-        } else
+        } else {
                 conn->state = BT_CLOSED;
+                if (conn->type == ACL_LINK)
+                        mgmt_connect_failed(hdev->id, &ev->bdaddr, ev->status);
+        }
 
         if (conn->type == ACL_LINK)
                 hci_sco_setup(conn, ev->status);
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 48f266a64caf..9fb989f4216e 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1227,3 +1227,14 @@ int mgmt_disconnect_failed(u16 index)
 
         return err;
 }
+
+int mgmt_connect_failed(u16 index, bdaddr_t *bdaddr, u8 status)
+{
+        struct mgmt_ev_connect_failed ev;
+
+        put_unaligned_le16(index, &ev.index);
+        bacpy(&ev.bdaddr, bdaddr);
+        ev.status = status;
+
+        return mgmt_event(MGMT_EV_CONNECT_FAILED, &ev, sizeof(ev), NULL);
+}