Re: [PATCH 2/6] Bluetooth: fix receiving L2CAP packets over LE

[Ville Tervo <ville.tervo@nokia.com>]

Hi Anderson,

On Sat, Oct 23, 2010 at 01:56:56AM +0200, ext Anderson Briglia wrote:
> From: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
> 
> As L2CAP packets coming over LE don't have any more encapsulation,
> other than L2CAP, we are able to process them as soon as they arrive.

Why is this change needed? Was something broken without this patch?



> 
> Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@openbossa.org>
> ---
>  net/bluetooth/l2cap.c |   17 +++++++++++++++--
>  1 files changed, 15 insertions(+), 2 deletions(-)
> 
> diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
> index 2bf083e..1ac44f4 100644
> --- a/net/bluetooth/l2cap.c
> +++ b/net/bluetooth/l2cap.c
> @@ -4768,17 +4768,30 @@ static int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
>  static int l2cap_recv_acldata(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
>  {
>  	struct l2cap_conn *conn = hcon->l2cap_data;
> +	struct l2cap_hdr *hdr;
> +	int len;
>  
>  	if (!conn && !(conn = l2cap_conn_add(hcon, 0)))
>  		goto drop;
>  
>  	BT_DBG("conn %p len %d flags 0x%x", conn, skb->len, flags);
>  
> +	if (hcon->type == LE_LINK) {
> +		hdr = (struct l2cap_hdr *) skb->data;
> +		len = __le16_to_cpu(hdr->len) + L2CAP_HDR_SIZE;
> +
> +		if (len == skb->len) {
> +			/* Complete frame received */
> +			l2cap_recv_frame(conn, skb);
> +			return 0;
> +		}
> +
> +		goto drop;
> +	}
> +
>  	if (flags & ACL_START) {
> -		struct l2cap_hdr *hdr;
>  		struct sock *sk;
>  		u16 cid;
> -		int len;
>  
>  		if (conn->rx_len) {
>  			BT_ERR("Unexpected start frame (len %d)", skb->len);
> -- 
> 1.7.0.4
> 
> --
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-- 
Ville