#! /usr/bin/env stap

probe kernel.statement("*@net/core/dev.c:3184")
{
        if (kernel_string($skb->dev->name) == "wlan0"){
                printf("protocol: %x\n", $skb->protocol);
                printf("vlan_tci: %x\n", $skb->vlan_tci);

        }
}