if_vlan_var.h revision 34649 
1/*
2 * Copyright 1998 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.  M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose.  It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	$Id$
30 */
31
32#ifndef _NET_IF_VLAN_VAR_H_
33#define	_NET_IF_VLAN_VAR_H_	1
34
35#ifdef KERNEL
36struct	ifvlan {
37	struct	arpcom ifv_ac;	/* make this an interface */
38	struct	ifnet *ifv_p;	/* parent inteface of this vlan */
39	struct	ifv_linkmib {
40		int	ifvm_parent;
41		u_int16_t ifvm_proto; /* encapsulation ethertype */
42		u_int16_t ifvm_tag; /* tag to apply on packets leaving if */
43	}	ifv_mib;
44};
45#define	ifv_if	ifv_ac.ac_if
46#define	ifv_tag	ifv_mib.ifvm_tag
47#endif /* KERNEL */
48
49struct	ether_vlan_header {
50	u_char	evl_dhost[ETHER_ADDR_LEN];
51	u_char	evl_shost[ETHER_ADDR_LEN];
52	u_int16_t evl_encap_proto;
53	u_int16_t evl_tag;
54	u_int16_t evl_proto;
55};
56
57#define	EVL_VLANOFTAG(tag) ((tag) & 4095)
58#define	EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
59#define	EVL_ENCAPLEN	4	/* length in octets of encapsulation */
60
61/* When these sorts of interfaces get their own identifier... */
62#define	IFT_8021_VLAN	IFT_PROPVIRTUAL
63
64/* sysctl(3) tags, for compatibility purposes */
65#define	VLANCTL_PROTO	1
66#define	VLANCTL_MAX	2
67
68/*
69 * Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls.
70 */
71struct	vlanreq {
72	char	vlr_parent[IFNAMSIZ];
73	u_short	vlr_tag;
74};
75#define	SIOCSETVLAN	SIOCSIFGENERIC
76#define	SIOCGETVLAN	SIOCGIFGENERIC
77
78#ifdef KERNEL
79/* shared with if_ethersubr.c: */
80extern	u_int vlan_proto;
81extern	int vlan_input(struct ether_header *eh, struct mbuf *m);
82#endif
83
84#endif /* _NET_IF_VLAN_VAR_H_ */
85