FreeBSD/Linux Kernel Cross Reference
sys/net/if_vlan_var.h

     /*
      * Copyright 1998 Massachusetts Institute of Technology
      *
      * Permission to use, copy, modify, and distribute this software and
      * its documentation for any purpose and without fee is hereby
      * granted, provided that both the above copyright notice and this
      * permission notice appear in all copies, that both the above
      * copyright notice and this permission notice appear in all
      * supporting documentation, and that the name of M.I.T. not be used
     * in advertising or publicity pertaining to distribution of the
     * software without specific, written prior permission.  M.I.T. makes
     * no representations about the suitability of this software for any
     * purpose.  It is provided "as is" without express or implied
     * warranty.
     * 
     * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
     * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
     * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
     * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
     * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _NET_IF_VLAN_VAR_H_
    #define _NET_IF_VLAN_VAR_H_     1
    
    #ifdef KERNEL
    
    struct vlan_mc_entry {
            struct ether_addr               mc_addr;
            SLIST_ENTRY(vlan_mc_entry)      mc_entries;
    };
    
    struct  ifvlan {
            struct  arpcom ifv_ac;  /* make this an interface */
            struct  ifnet *ifv_p;   /* parent inteface of this vlan */
            struct  ifv_linkmib {
                    int     ifvm_parent;
                    u_int16_t ifvm_proto; /* encapsulation ethertype */
                    u_int16_t ifvm_tag; /* tag to apply on packets leaving if */
            }       ifv_mib;
            SLIST_HEAD(__vlan_mchead, vlan_mc_entry)        vlan_mc_listhead;
    };
    #define ifv_if  ifv_ac.ac_if
    #define ifv_tag ifv_mib.ifvm_tag
    #endif /* KERNEL */
    
    struct  ether_vlan_header {
            u_char  evl_dhost[ETHER_ADDR_LEN];
            u_char  evl_shost[ETHER_ADDR_LEN];
            u_int16_t evl_encap_proto;
            u_int16_t evl_tag;
            u_int16_t evl_proto;
    };
    
    #define EVL_VLANOFTAG(tag) ((tag) & 4095)
    #define EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
    #define EVL_ENCAPLEN    4       /* length in octets of encapsulation */
    
    /* When these sorts of interfaces get their own identifier... */
    #define IFT_8021_VLAN   IFT_PROPVIRTUAL
    
    /* sysctl(3) tags, for compatibility purposes */
    #define VLANCTL_PROTO   1
    #define VLANCTL_MAX     2
    
    /*
     * Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls.
     */
    struct  vlanreq {
            char    vlr_parent[IFNAMSIZ];
            u_short vlr_tag;
    };
    #define SIOCSETVLAN     SIOCSIFGENERIC
    #define SIOCGETVLAN     SIOCGIFGENERIC
    
    #ifdef KERNEL
    /* shared with if_ethersubr.c: */
    extern  u_int vlan_proto;
    extern  int vlan_input(struct ether_header *eh, struct mbuf *m);
    extern  int vlan_input_tag(struct ether_header *eh,
                            struct mbuf *m, u_int16_t t);
    #endif
    
    #endif /* _NET_IF_VLAN_VAR_H_ */

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