Re: [PATCH net-next v11 12/23] ovpn: implement TCP transport

[Antonio Quartulli <antonio@openvpn.net>]

On 29/10/2024 11:47, Antonio Quartulli wrote:
[...]
> +
> +	/* DATA_V2 packets are handled in kernel, the rest goes to user space */
> +	if (likely(ovpn_opcode_from_skb(skb, 0) == OVPN_DATA_V2)) {
> +		/* hold reference to peer as required by ovpn_recv().
> +		 *
> +		 * NOTE: in this context we should already be holding a
> +		 * reference to this peer, therefore ovpn_peer_hold() is
> +		 * not expected to fail
> +		 */
> +		if (WARN_ON(!ovpn_peer_hold(peer)))
> +			goto err;
> +
> +		ovpn_recv(peer, skb);
> +	} else {

As pointed out by Sabrina, we are indeed sending DATA_V1 packets to 
userspace.
Not a big deal because userspace will likely ignore or drop them.

However, I will change this and mirror what we do for UDP.

Thanks.

Regards,


> +		/* The packet size header must be there when sending the packet
> +		 * to userspace, therefore we put it back
> +		 */
> +		skb_push(skb, 2);
> +		ovpn_tcp_to_userspace(peer, strp->sk, skb);
> +	}
> +
> +	return;



-- 
Antonio Quartulli
OpenVPN Inc.