if_vlan_var.h revision 60833 
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 * $FreeBSD: head/sys/net/if_vlan_var.h 60833 2000-05-23 20:41:01Z jake $
30 */
31
32#ifndef _NET_IF_VLAN_VAR_H_
33#define	_NET_IF_VLAN_VAR_H_	1
34
35#ifdef _KERNEL
36struct vlan_mc_entry {
37	struct ether_addr		mc_addr;
38	SLIST_ENTRY(struct vlan_mc_entry)	mc_entries;
39};
40
41struct	ifvlan {
42	struct	arpcom ifv_ac;	/* make this an interface */
43	struct	ifnet *ifv_p;	/* parent inteface of this vlan */
44	struct	ifv_linkmib {
45		int	ifvm_parent;
46		u_int16_t ifvm_proto; /* encapsulation ethertype */
47		u_int16_t ifvm_tag; /* tag to apply on packets leaving if */
48	}	ifv_mib;
49	SLIST_HEAD(__vlan_mchead, struct vlan_mc_entry)	vlan_mc_listhead;
50};
51#define	ifv_if	ifv_ac.ac_if
52#define	ifv_tag	ifv_mib.ifvm_tag
53#endif /* _KERNEL */
54
55struct	ether_vlan_header {
56	u_char	evl_dhost[ETHER_ADDR_LEN];
57	u_char	evl_shost[ETHER_ADDR_LEN];
58	u_int16_t evl_encap_proto;
59	u_int16_t evl_tag;
60	u_int16_t evl_proto;
61};
62
63#define	EVL_VLANOFTAG(tag) ((tag) & 4095)
64#define	EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
65#define	EVL_ENCAPLEN	4	/* length in octets of encapsulation */
66
67/* When these sorts of interfaces get their own identifier... */
68#define	IFT_8021_VLAN	IFT_PROPVIRTUAL
69
70/* sysctl(3) tags, for compatibility purposes */
71#define	VLANCTL_PROTO	1
72#define	VLANCTL_MAX	2
73
74/*
75 * Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls.
76 */
77struct	vlanreq {
78	char	vlr_parent[IFNAMSIZ];
79	u_short	vlr_tag;
80};
81#define	SIOCSETVLAN	SIOCSIFGENERIC
82#define	SIOCGETVLAN	SIOCGIFGENERIC
83
84#ifdef _KERNEL
85/* shared with if_ethersubr.c: */
86extern	u_int vlan_proto;
87extern	int vlan_input(struct ether_header *eh, struct mbuf *m);
88extern	int vlan_input_tag(struct ether_header *eh,
89			struct mbuf *m, u_int16_t t);
90#endif
91
92#endif /* _NET_IF_VLAN_VAR_H_ */
93