C++ (Cpp) vlan_deaccel_tag Examples

Example #1

File: vport-internal_dev.c Project: StonyBrookUniversity/ovs-vxlan

static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
{
	struct net_device *netdev = netdev_vport_priv(vport)->dev;
	int len;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
	if (unlikely(vlan_deaccel_tag(skb)))
		return 0;
#endif

	len = skb->len;

	skb_dst_drop(skb);
	nf_reset(skb);
	secpath_reset(skb);

	skb->dev = netdev;
	skb->pkt_type = PACKET_HOST;
	skb->protocol = eth_type_trans(skb, netdev);
	forward_ip_summed(skb, false);

	netif_rx(skb);

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
	netdev->last_rx = jiffies;
#endif

	return len;
}

Example #2

File: datapath.c Project: axray/dataware.dreamplug

static int queue_userspace_packet(int dp_ifindex, struct sk_buff *skb,
				  const struct dp_upcall_info *upcall_info)
{
	struct ovs_header *upcall;
	struct sk_buff *nskb = NULL;
	struct sk_buff *user_skb; /* to be queued to userspace */
	struct nlattr *nla;
	unsigned int len;
	int err;

	if (vlan_tx_tag_present(skb)) {
		nskb = skb_clone(skb, GFP_ATOMIC);
		if (!nskb)
			return -ENOMEM;
		
		err = vlan_deaccel_tag(nskb);
		if (err)
			return err;

		skb = nskb;
	}

	if (nla_attr_size(skb->len) > USHRT_MAX) {
		err = -EFBIG;
		goto out;
	}

	len = sizeof(struct ovs_header);
	len += nla_total_size(skb->len);
	len += nla_total_size(FLOW_BUFSIZE);
	if (upcall_info->cmd == OVS_PACKET_CMD_ACTION)
		len += nla_total_size(8);

	user_skb = genlmsg_new(len, GFP_ATOMIC);
	if (!user_skb) {
		err = -ENOMEM;
		goto out;
	}

	upcall = genlmsg_put(user_skb, 0, 0, &dp_packet_genl_family,
			     0, upcall_info->cmd);
	upcall->dp_ifindex = dp_ifindex;

	nla = nla_nest_start(user_skb, OVS_PACKET_ATTR_KEY);
	ovs_flow_to_nlattrs(upcall_info->key, user_skb);
	nla_nest_end(user_skb, nla);

	if (upcall_info->userdata)
		nla_put_u64(user_skb, OVS_PACKET_ATTR_USERDATA,
			    nla_get_u64(upcall_info->userdata));

	nla = __nla_reserve(user_skb, OVS_PACKET_ATTR_PACKET, skb->len);

	skb_copy_and_csum_dev(skb, nla_data(nla));

	err = genlmsg_unicast(&init_net, user_skb, upcall_info->pid);

out:
	kfree_skb(nskb);
	return err;
}