Bluetooth: Add support for sending MGMT commands and events to monitor

[deliverable/linux.git] / net / bluetooth / hci_sock.c

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 2d872500683824c754c996014463280f2f83b9d7..576ea48631b922a6e0c13dfeb10bbde3f49b00ba 100644 (file)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -315,6 +315,60 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
        kfree_skb(skb_copy);
 }
 
+void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
+                                void *data, u16 data_len, ktime_t tstamp,
+                                int flag, struct sock *skip_sk)
+{
+       struct sock *sk;
+       __le16 index;
+
+       if (hdev)
+               index = cpu_to_le16(hdev->id);
+       else
+               index = cpu_to_le16(MGMT_INDEX_NONE);
+
+       read_lock(&hci_sk_list.lock);
+
+       sk_for_each(sk, &hci_sk_list.head) {
+               struct hci_mon_hdr *hdr;
+               struct sk_buff *skb;
+
+               if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
+                       continue;
+
+               /* Ignore socket without the flag set */
+               if (!hci_sock_test_flag(sk, flag))
+                       continue;
+
+               /* Skip the original socket */
+               if (sk == skip_sk)
+                       continue;
+
+               skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
+               if (!skb)
+                       continue;
+
+               put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+               put_unaligned_le16(event, skb_put(skb, 2));
+
+               if (data)
+                       memcpy(skb_put(skb, data_len), data, data_len);
+
+               skb->tstamp = tstamp;
+
+               hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
+               hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
+               hdr->index = index;
+               hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+               hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+                                   HCI_SOCK_TRUSTED, NULL);
+               kfree_skb(skb);
+       }
+
+       read_unlock(&hci_sk_list.lock);
+}
+
 static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
 {
        struct hci_mon_hdr *hdr;
@@ -447,6 +501,33 @@ static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
        return skb;
 }
 
+static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
+                                                  u16 opcode, u16 len,
+                                                  const void *buf)
+{
+       struct hci_mon_hdr *hdr;
+       struct sk_buff *skb;
+
+       skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
+       if (!skb)
+               return NULL;
+
+       put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
+       put_unaligned_le16(opcode, skb_put(skb, 2));
+
+       if (buf)
+               memcpy(skb_put(skb, len), buf, len);
+
+       __net_timestamp(skb);
+
+       hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
+       hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
+       hdr->index = cpu_to_le16(index);
+       hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
+
+       return skb;
+}
+
 static void __printf(2, 3)
 send_monitor_note(struct sock *sk, const char *fmt, ...)
 {
@@ -1257,6 +1338,19 @@ static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
                goto done;
        }
 
+       if (chan->channel == HCI_CHANNEL_CONTROL) {
+               struct sk_buff *skb;
+
+               /* Send event to monitor */
+               skb = create_monitor_ctrl_command(sk, index, opcode, len,
+                                                 buf + sizeof(*hdr));
+               if (skb) {
+                       hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
+                                           HCI_SOCK_TRUSTED, NULL);
+                       kfree_skb(skb);
+               }
+       }
+
        if (opcode >= chan->handler_count ||
            chan->handlers[opcode].func == NULL) {
                BT_DBG("Unknown op %u", opcode);