Bluetooth: Add support for LE Start Encryption

This adds support for starting SMP Phase 2 Encryption, when the initial
SMP negotiation is successful. This adds the LE Start Encryption and LE
Long Term Key Request commands and related events.

Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 49 insertions, 0 deletions

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 37f5a174f072..18193831bbf1 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -204,6 +204,55 @@ void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
 }
 EXPORT_SYMBOL(hci_le_conn_update);
 
+void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
+                                                        __u8 ltk[16])
+{
+        struct hci_dev *hdev = conn->hdev;
+        struct hci_cp_le_start_enc cp;
+
+        BT_DBG("%p", conn);
+
+        memset(&cp, 0, sizeof(cp));
+
+        cp.handle = cpu_to_le16(conn->handle);
+        memcpy(cp.ltk, ltk, sizeof(cp.ltk));
+        cp.ediv = ediv;
+        memcpy(cp.rand, rand, sizeof(rand));
+
+        hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
+}
+EXPORT_SYMBOL(hci_le_start_enc);
+
+void hci_le_ltk_reply(struct hci_conn *conn, u8 ltk[16])
+{
+        struct hci_dev *hdev = conn->hdev;
+        struct hci_cp_le_ltk_reply cp;
+
+        BT_DBG("%p", conn);
+
+        memset(&cp, 0, sizeof(cp));
+
+        cp.handle = cpu_to_le16(conn->handle);
+        memcpy(cp.ltk, ltk, sizeof(ltk));
+
+        hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
+}
+EXPORT_SYMBOL(hci_le_ltk_reply);
+
+void hci_le_ltk_neg_reply(struct hci_conn *conn)
+{
+        struct hci_dev *hdev = conn->hdev;
+        struct hci_cp_le_ltk_neg_reply cp;
+
+        BT_DBG("%p", conn);
+
+        memset(&cp, 0, sizeof(cp));
+
+        cp.handle = cpu_to_le16(conn->handle);
+
+        hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(cp), &cp);
+}
+
 /* Device _must_ be locked */
 void hci_sco_setup(struct hci_conn *conn, __u8 status)
 {