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/*-
* 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
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_VLID_MASK 0x0FFF
#define EVL_PRI_MASK 0xE000
#define EVL_VLANOFTAG(tag) ((tag) & EVL_VLID_MASK)
#define EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
#define EVL_CFIOFTAG(tag) (((tag) >> 12) & 1)
#define EVL_MAKETAG(vlid, pri, cfi) \
((((((pri) & 7) << 1) | ((cfi) & 1)) << 12) | ((vlid) & EVL_VLID_MASK))
/* Set the VLAN ID in an mbuf packet header non-destructively. */
#define EVL_APPLY_VLID(m, vlid) \
do { \
if ((m)->m_flags & M_VLANTAG) { \
(m)->m_pkthdr.ether_vtag &= EVL_VLID_MASK; \
(m)->m_pkthdr.ether_vtag |= (vlid); \
} else { \
(m)->m_pkthdr.ether_vtag = (vlid); \
(m)->m_flags |= M_VLANTAG; \
} \
} while (0)
/* Set the priority ID in an mbuf packet header non-destructively. */
#define EVL_APPLY_PRI(m, pri) \
do { \
if ((m)->m_flags & M_VLANTAG) { \
uint16_t __vlantag = (m)->m_pkthdr.ether_vtag; \
(m)->m_pkthdr.ether_vtag |= EVL_MAKETAG( \
EVL_VLANOFTAG(__vlantag), (pri), \
EVL_CFIOFTAG(__vlantag)); \
} else { \
(m)->m_pkthdr.ether_vtag = \
EVL_MAKETAG(0, (pri), 0); \
(m)->m_flags |= M_VLANTAG; \
} \
} while (0)
/* 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
/*
* Drivers that are capable of adding and removing the VLAN header
* in hardware indicate they support this by marking IFCAP_VLAN_HWTAGGING
* in if_capabilities. Drivers for hardware that is capable
* of handling larger MTU's that may include a software-appended
* VLAN header w/o lowering the normal MTU should mark IFCAP_VLAN_MTU
* in if_capabilities; this notifies the VLAN code it can leave the
* MTU on the vlan interface at the normal setting.
*/
/*
* VLAN tags are stored in host byte order. Byte swapping may be
* necessary.
*
* Drivers that support hardware VLAN tag stripping fill in the
* received VLAN tag (containing both vlan and priority information)
* into the ether_vtag mbuf packet header field:
*
* m->m_pkthdr.ether_vtag = vtag; // ntohs()?
* m->m_flags |= M_VLANTAG;
*
* to mark the packet m with the specified VLAN tag.
*
* On output the driver should check the mbuf for the M_VLANTAG
* flag to see if a VLAN tag is present and valid:
*
* if (m->m_flags & M_VLANTAG) {
* ... = m->m_pkthdr.ether_vtag; // htons()?
* ... pass tag to hardware ...
* }
*
* Note that a driver must indicate it supports hardware VLAN
* stripping/insertion by marking IFCAP_VLAN_HWTAGGING in
* if_capabilities.
*/
#define VLAN_CAPABILITIES(_ifp) do { \
if ((_ifp)->if_vlantrunk != NULL) \
(*vlan_trunk_cap_p)(_ifp); \
} while (0)
#define VLAN_TRUNKDEV(_ifp) \
(_ifp)->if_type == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL
#define VLAN_TAG(_ifp, _vid) \
(_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL
#define VLAN_COOKIE(_ifp) \
(_ifp)->if_type == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL
#define VLAN_SETCOOKIE(_ifp, _cookie) \
(_ifp)->if_type == IFT_L2VLAN ? \
(*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL
#define VLAN_DEVAT(_ifp, _vid) \
(_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_vid)) : NULL
extern void (*vlan_trunk_cap_p)(struct ifnet *);
extern struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
extern struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
extern int (*vlan_tag_p)(struct ifnet *, uint16_t *);
extern int (*vlan_setcookie_p)(struct ifnet *, void *);
extern void *(*vlan_cookie_p)(struct ifnet *);
#endif /* _KERNEL */
#endif /* _NET_IF_VLAN_VAR_H_ */
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