Bluetooth: Implement UUID handling through the management interface

This patch adds methods to the management interface for userspace to
notify the kernel of which services have been registered for specific
adapters. This information is needed for setting the appropriate Class
of Device value as well as the Extended Inquiry Response value. This
patch doesn't actually implement setting of these values but just
provides the storage of the UUIDs so the needed functionality can be
built on top of it.

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

1 files changed, 120 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index d107350..0854c2f 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -571,6 +571,120 @@ failed:
 	return err;
 }
 
+static int uuid_rsp(struct sock *sk, u16 opcode, u16 index)
+{
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_complete *ev;
+	struct sk_buff *skb;
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(index), GFP_ATOMIC);
+	if (!skb)
+		return -ENOMEM;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+	hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(index));
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	put_unaligned_le16(opcode, &ev->opcode);
+
+	put_unaligned_le16(index, skb_put(skb, sizeof(index)));
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+
+	return 0;
+}
+
+static int add_uuid(struct sock *sk, unsigned char *data, u16 len)
+{
+	struct mgmt_cp_add_uuid *cp;
+	struct hci_dev *hdev;
+	struct bt_uuid *uuid;
+	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_ADD_UUID, ENODEV);
+
+	hci_dev_lock_bh(hdev);
+
+	uuid = kmalloc(sizeof(*uuid), GFP_ATOMIC);
+	if (!uuid) {
+		err = -ENOMEM;
+		goto failed;
+	}
+
+	memcpy(uuid->uuid, cp->uuid, 16);
+
+	list_add(&uuid->list, &hdev->uuids);
+
+	err = uuid_rsp(sk, MGMT_OP_ADD_UUID, dev_id);
+
+failed:
+	hci_dev_unlock_bh(hdev);
+	hci_dev_put(hdev);
+
+	return err;
+}
+
+static int remove_uuid(struct sock *sk, unsigned char *data, u16 len)
+{
+	struct list_head *p, *n;
+	struct mgmt_cp_add_uuid *cp;
+	struct hci_dev *hdev;
+	u8 bt_uuid_any[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+	u16 dev_id;
+	int err, found;
+
+	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_REMOVE_UUID, ENODEV);
+
+	hci_dev_lock_bh(hdev);
+
+	if (memcmp(cp->uuid, bt_uuid_any, 16) == 0) {
+		err = hci_uuids_clear(hdev);
+		goto unlock;
+	}
+
+	found = 0;
+
+	list_for_each_safe(p, n, &hdev->uuids) {
+		struct bt_uuid *match = list_entry(p, struct bt_uuid, list);
+
+		if (memcmp(match->uuid, cp->uuid, 16) != 0)
+			continue;
+
+		list_del(&match->list);
+		found++;
+	}
+
+	if (found == 0) {
+		err = cmd_status(sk, MGMT_OP_REMOVE_UUID, ENOENT);
+		goto unlock;
+	}
+
+	err = uuid_rsp(sk, MGMT_OP_REMOVE_UUID, dev_id);
+
+unlock:
+	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;
@@ -623,6 +737,12 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
 	case MGMT_OP_SET_PAIRABLE:
 		err = set_pairable(sk, buf + sizeof(*hdr), len);
 		break;
+	case MGMT_OP_ADD_UUID:
+		err = add_uuid(sk, buf + sizeof(*hdr), len);
+		break;
+	case MGMT_OP_REMOVE_UUID:
+		err = remove_uuid(sk, buf + sizeof(*hdr), len);
+		break;
 	default:
 		BT_DBG("Unknown op %u", opcode);
 		err = cmd_status(sk, opcode, 0x01);