Bluetooth: Add read_info management command

This patch implements the read_info command which is used to fetch basic
info about an adapter.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 82 insertions, 8 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 7a8e321875c9..d6c5a32de0b6 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -32,6 +32,33 @@
 #define MGMT_VERSION    0
 #define MGMT_REVISION   1
 
+static int cmd_status(struct sock *sk, u16 cmd, u8 status)
+{
+        struct sk_buff *skb;
+        struct mgmt_hdr *hdr;
+        struct mgmt_ev_cmd_status *ev;
+
+        BT_DBG("sock %p", sk);
+
+        skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC);
+        if (!skb)
+                return -ENOMEM;
+
+        hdr = (void *) skb_put(skb, sizeof(*hdr));
+
+        hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
+        hdr->len = cpu_to_le16(sizeof(*ev));
+
+        ev = (void *) skb_put(skb, sizeof(*ev));
+        ev->status = status;
+        put_unaligned_le16(cmd, &ev->opcode);
+
+        if (sock_queue_rcv_skb(sk, skb) < 0)
+                kfree_skb(skb);
+
+        return 0;
+}
+
 static int read_version(struct sock *sk)
 {
         struct sk_buff *skb;
@@ -112,26 +139,70 @@ static int read_index_list(struct sock *sk)
         return 0;
 }
 
-static int cmd_status(struct sock *sk, u16 cmd, u8 status)
+static int read_controller_info(struct sock *sk, unsigned char *data, u16 len)
 {
         struct sk_buff *skb;
         struct mgmt_hdr *hdr;
-        struct mgmt_ev_cmd_status *ev;
+        struct mgmt_ev_cmd_complete *ev;
+        struct mgmt_rp_read_info *rp;
+        struct mgmt_cp_read_info *cp;
+        struct hci_dev *hdev;
+        u16 dev_id;
 
         BT_DBG("sock %p", sk);
 
-        skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC);
+        if (len != 2)
+                return cmd_status(sk, MGMT_OP_READ_INFO, EINVAL);
+
+        skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
         if (!skb)
                 return -ENOMEM;
 
         hdr = (void *) skb_put(skb, sizeof(*hdr));
-
-        hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
-        hdr->len = cpu_to_le16(sizeof(*ev));
+        hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+        hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
 
         ev = (void *) skb_put(skb, sizeof(*ev));
-        ev->status = status;
-        put_unaligned_le16(cmd, &ev->opcode);
+        put_unaligned_le16(MGMT_OP_READ_INFO, &ev->opcode);
+
+        rp = (void *) skb_put(skb, sizeof(*rp));
+
+        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) {
+                kfree_skb(skb);
+                return cmd_status(sk, MGMT_OP_READ_INFO, ENODEV);
+        }
+
+        hci_dev_lock_bh(hdev);
+
+        put_unaligned_le16(hdev->id, &rp->index);
+        rp->type = hdev->dev_type;
+
+        rp->powered = test_bit(HCI_UP, &hdev->flags);
+        rp->discoverable = test_bit(HCI_ISCAN, &hdev->flags);
+        rp->pairable = test_bit(HCI_PSCAN, &hdev->flags);
+
+        if (test_bit(HCI_AUTH, &hdev->flags))
+                rp->sec_mode = 3;
+        else if (hdev->ssp_mode > 0)
+                rp->sec_mode = 4;
+        else
+                rp->sec_mode = 2;
+
+        bacpy(&rp->bdaddr, &hdev->bdaddr);
+        memcpy(rp->features, hdev->features, 8);
+        memcpy(rp->dev_class, hdev->dev_class, 3);
+        put_unaligned_le16(hdev->manufacturer, &rp->manufacturer);
+        rp->hci_ver = hdev->hci_ver;
+        put_unaligned_le16(hdev->hci_rev, &rp->hci_rev);
+
+        hci_dev_unlock_bh(hdev);
+        hci_dev_put(hdev);
 
         if (sock_queue_rcv_skb(sk, skb) < 0)
                 kfree_skb(skb);
@@ -176,6 +247,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
         case MGMT_OP_READ_INDEX_LIST:
                 err = read_index_list(sk);
                 break;
+        case MGMT_OP_READ_INFO:
+                err = read_controller_info(sk, buf + sizeof(*hdr), len);
+                break;
         default:
                 BT_DBG("Unknown op %u", opcode);
                 err = cmd_status(sk, opcode, 0x01);