Bluetooth: Implement set_pairable managment command

This patch implements a new set_pairable management command to control
the pairable state of local adapters. The state is represented using a
new HCI_PAIRABLE flag in the hci_dev struct.

For backwards compatibility with older user space versions the
HCI_PAIRABLE flag gets automatically set when the existence of an
adapter is reported to user space through legacy methods and the
HCI_MGMT flag is not set.

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

1 files changed, 65 insertions, 23 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 13872ae219c9..d10735076a25 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -481,6 +481,29 @@ failed:
         return err;
 }
 
+static int mgmt_event(u16 event, void *data, u16 data_len, struct sock *skip_sk)
+{
+        struct sk_buff *skb;
+        struct mgmt_hdr *hdr;
+
+        skb = alloc_skb(sizeof(*hdr) + data_len, GFP_ATOMIC);
+        if (!skb)
+                return -ENOMEM;
+
+        bt_cb(skb)->channel = HCI_CHANNEL_CONTROL;
+
+        hdr = (void *) skb_put(skb, sizeof(*hdr));
+        hdr->opcode = cpu_to_le16(event);
+        hdr->len = cpu_to_le16(data_len);
+
+        memcpy(skb_put(skb, data_len), data, data_len);
+
+        hci_send_to_sock(NULL, skb, skip_sk);
+        kfree_skb(skb);
+
+        return 0;
+}
+
 static int send_mode_rsp(struct sock *sk, u16 opcode, u16 index, u8 val)
 {
         struct mgmt_hdr *hdr;
@@ -509,6 +532,45 @@ static int send_mode_rsp(struct sock *sk, u16 opcode, u16 index, u8 val)
         return 0;
 }
 
+static int set_pairable(struct sock *sk, unsigned char *data, u16 len)
+{
+        struct mgmt_mode *cp, ev;
+        struct hci_dev *hdev;
+        u16 dev_id;
+        int err;
+
+        cp = (void *) data;
+        dev_id = get_unaligned_le16(&cp->index);
+
+        BT_DBG("request for hci%u", dev_id);
+
+        hdev = hci_dev_get(dev_id);
+        if (!hdev)
+                return cmd_status(sk, MGMT_OP_SET_PAIRABLE, ENODEV);
+
+        hci_dev_lock_bh(hdev);
+
+        if (cp->val)
+                set_bit(HCI_PAIRABLE, &hdev->flags);
+        else
+                clear_bit(HCI_PAIRABLE, &hdev->flags);
+
+        err = send_mode_rsp(sk, MGMT_OP_SET_PAIRABLE, dev_id, cp->val);
+        if (err < 0)
+                goto failed;
+
+        put_unaligned_le16(dev_id, &ev.index);
+        ev.val = cp->val;
+
+        err = mgmt_event(MGMT_EV_PAIRABLE, &ev, sizeof(ev), sk);
+
+failed:
+        hci_dev_unlock_bh(hdev);
+        hci_dev_put(hdev);
+
+        return err;
+}
+
 int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
 {
         unsigned char *buf;
@@ -558,6 +620,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
         case MGMT_OP_SET_CONNECTABLE:
                 err = set_connectable(sk, buf + sizeof(*hdr), len);
                 break;
+        case MGMT_OP_SET_PAIRABLE:
+                err = set_pairable(sk, buf + sizeof(*hdr), len);
+                break;
         default:
                 BT_DBG("Unknown op %u", opcode);
                 err = cmd_status(sk, opcode, 0x01);
@@ -574,29 +639,6 @@ done:
         return err;
 }
 
-static int mgmt_event(u16 event, void *data, u16 data_len, struct sock *skip_sk)
-{
-        struct sk_buff *skb;
-        struct mgmt_hdr *hdr;
-
-        skb = alloc_skb(sizeof(*hdr) + data_len, GFP_ATOMIC);
-        if (!skb)
-                return -ENOMEM;
-
-        bt_cb(skb)->channel = HCI_CHANNEL_CONTROL;
-
-        hdr = (void *) skb_put(skb, sizeof(*hdr));
-        hdr->opcode = cpu_to_le16(event);
-        hdr->len = cpu_to_le16(data_len);
-
-        memcpy(skb_put(skb, data_len), data, data_len);
-
-        hci_send_to_sock(NULL, skb, skip_sk);
-        kfree_skb(skb);
-
-        return 0;
-}
-
 int mgmt_index_added(u16 index)
 {
         struct mgmt_ev_index_added ev;