diff options
| -rw-r--r-- | net/bluetooth/hci_sock.c | 64 |
1 files changed, 41 insertions, 23 deletions
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 9bd7d959e384..c45ec25aefb9 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -66,6 +66,46 @@ static struct bt_sock_list hci_sk_list = { .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock) }; +static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb) +{ + struct hci_filter *flt; + int flt_type, flt_event; + + /* Apply filter */ + flt = &hci_pi(sk)->filter; + + if (bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) + flt_type = 0; + else + flt_type = bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS; + + if (!test_bit(flt_type, &flt->type_mask)) + return true; + + /* Extra filter for event packets only */ + if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT) + return false; + + flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); + + if (!hci_test_bit(flt_event, &flt->event_mask)) + return true; + + /* Check filter only when opcode is set */ + if (!flt->opcode) + return false; + + if (flt_event == HCI_EV_CMD_COMPLETE && + flt->opcode != get_unaligned((__le16 *)(skb->data + 3))) + return true; + + if (flt_event == HCI_EV_CMD_STATUS && + flt->opcode != get_unaligned((__le16 *)(skb->data + 4))) + return true; + + return false; +} + /* Send frame to RAW socket */ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) { @@ -77,7 +117,6 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) read_lock(&hci_sk_list.lock); sk_for_each(sk, &hci_sk_list.head) { - struct hci_filter *flt; struct sk_buff *nskb; if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev) @@ -90,30 +129,9 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) continue; - /* Apply filter */ - flt = &hci_pi(sk)->filter; - - if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ? - 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), - &flt->type_mask)) + if (is_filtered_packet(sk, skb)) continue; - if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) { - int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS); - - if (!hci_test_bit(evt, &flt->event_mask)) - continue; - - if (flt->opcode && - ((evt == HCI_EV_CMD_COMPLETE && - flt->opcode != - get_unaligned((__le16 *)(skb->data + 3))) || - (evt == HCI_EV_CMD_STATUS && - flt->opcode != - get_unaligned((__le16 *)(skb->data + 4))))) - continue; - } - if (!skb_copy) { /* Create a private copy with headroom */ skb_copy = __pskb_copy(skb, 1, GFP_ATOMIC); |