Bluetooth: mgmt: Add support for setting the local name

This patch adds a new set_local_name management command as well as a
local_name_changed management event. With these user space can both
change the local name as well as monitor changes to it by others.

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

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 9aabb14..3912c7a 100644 (file)
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -767,6 +767,7 @@ int mgmt_user_confirm_reply_complete(u16 index, bdaddr_t *bdaddr, u8 status);
 int mgmt_user_confirm_neg_reply_complete(u16 index, bdaddr_t *bdaddr,
                                                                u8 status);
 int mgmt_auth_failed(u16 index, bdaddr_t *bdaddr, u8 status);
+int mgmt_set_local_name_complete(u16 index, u8 *name, 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 7d0749b..89e7c82 100644 (file)
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -172,6 +172,11 @@ struct mgmt_rp_user_confirm_reply {
 
 #define MGMT_OP_USER_CONFIRM_NEG_REPLY 0x0016
 
+#define MGMT_OP_SET_LOCAL_NAME         0x0017
+struct mgmt_cp_set_local_name {
+       __u8 name[MGMT_MAX_NAME_LENGTH];
+} __packed;
+
 #define MGMT_EV_CMD_COMPLETE           0x0001
 struct mgmt_ev_cmd_complete {
        __le16 opcode;
@@ -239,3 +244,8 @@ struct mgmt_ev_auth_failed {
        bdaddr_t bdaddr;
        __u8 status;
 } __packed;
+
+#define MGMT_EV_LOCAL_NAME_CHANGED     0x0011
+struct mgmt_ev_local_name_changed {
+       __u8 name[MGMT_MAX_NAME_LENGTH];
+} __packed;

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 91ef526..0def3e1 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -193,13 +193,16 @@ static void hci_cc_write_local_name(struct hci_dev *hdev, struct sk_buff *skb)
 
        BT_DBG("%s status 0x%x", hdev->name, status);
 
-       if (status)
-               return;
-
        sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
        if (!sent)
                return;
 
+       if (test_bit(HCI_MGMT, &hdev->flags))
+               mgmt_set_local_name_complete(hdev->id, sent, status);
+
+       if (status)
+               return;
+
        memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
 }
 

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index ffdb2f4..f7ce782 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1256,6 +1256,45 @@ failed:
        return err;
 }
 
+static int set_local_name(struct sock *sk, u16 index, unsigned char *data,
+                                                               u16 len)
+{
+       struct mgmt_cp_set_local_name *mgmt_cp = (void *) data;
+       struct hci_cp_write_local_name hci_cp;
+       struct hci_dev *hdev;
+       struct pending_cmd *cmd;
+       int err;
+
+       BT_DBG("");
+
+       if (len != sizeof(*mgmt_cp))
+               return cmd_status(sk, index, MGMT_OP_SET_LOCAL_NAME, EINVAL);
+
+       hdev = hci_dev_get(index);
+       if (!hdev)
+               return cmd_status(sk, index, MGMT_OP_SET_LOCAL_NAME, ENODEV);
+
+       hci_dev_lock_bh(hdev);
+
+       cmd = mgmt_pending_add(sk, MGMT_OP_SET_LOCAL_NAME, index, data, len);
+       if (!cmd) {
+               err = -ENOMEM;
+               goto failed;
+       }
+
+       memcpy(hci_cp.name, mgmt_cp->name, sizeof(hci_cp.name));
+       err = hci_send_cmd(hdev, HCI_OP_WRITE_LOCAL_NAME, sizeof(hci_cp),
+                                                               &hci_cp);
+       if (err < 0)
+               mgmt_pending_remove(cmd);
+
+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;
@@ -1351,6 +1390,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
        case MGMT_OP_USER_CONFIRM_NEG_REPLY:
                err = user_confirm_reply(sk, index, buf + sizeof(*hdr), len, 0);
                break;
+       case MGMT_OP_SET_LOCAL_NAME:
+               err = set_local_name(sk, index, buf + sizeof(*hdr), len);
+               break;
        default:
                BT_DBG("Unknown op %u", opcode);
                err = cmd_status(sk, index, opcode, 0x01);
@@ -1647,3 +1689,36 @@ int mgmt_auth_failed(u16 index, bdaddr_t *bdaddr, u8 status)
 
        return mgmt_event(MGMT_EV_AUTH_FAILED, index, &ev, sizeof(ev), NULL);
 }
+
+int mgmt_set_local_name_complete(u16 index, u8 *name, u8 status)
+{
+       struct pending_cmd *cmd;
+       struct mgmt_cp_set_local_name ev;
+       int err;
+
+       memset(&ev, 0, sizeof(ev));
+       memcpy(ev.name, name, HCI_MAX_NAME_LENGTH);
+
+       cmd = mgmt_pending_find(MGMT_OP_SET_LOCAL_NAME, index);
+       if (!cmd)
+               goto send_event;
+
+       if (status) {
+               err = cmd_status(cmd->sk, index, MGMT_OP_SET_LOCAL_NAME, EIO);
+               goto failed;
+       }
+
+       err = cmd_complete(cmd->sk, index, MGMT_OP_SET_LOCAL_NAME, &ev,
+                                                               sizeof(ev));
+       if (err < 0)
+               goto failed;
+
+send_event:
+       err = mgmt_event(MGMT_EV_LOCAL_NAME_CHANGED, index, &ev, sizeof(ev),
+                                                       cmd ? cmd->sk : NULL);
+
+failed:
+       if (cmd)
+               mgmt_pending_remove(cmd);
+       return err;
+}