get_vlan_id()

unsigned short get_vlan_id(struct sk_buff *skb)

{

    struct vlan_hdr *hdr;

    unsigned short tci;               

    unsigned short id = 0;

     

    if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {

        hdr = (struct vlan_hdr *)(skb->data);

        tci = hdr->h_vlan_TCI;

        id = (tci & VLAN_VID_MASK) >> 8;

    }

     

    return id;

}




/* This function will return Vlan id of a skb. */