164 lines
5.8 KiB
C
164 lines
5.8 KiB
C
/*-
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* Copyright 1998 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and
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* its documentation for any purpose and without fee is hereby
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* granted, provided that both the above copyright notice and this
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* permission notice appear in all copies, that both the above
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* copyright notice and this permission notice appear in all
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* supporting documentation, and that the name of M.I.T. not be used
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* in advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission. M.I.T. makes
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied
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* warranty.
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*
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* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
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* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NET_IF_VLAN_VAR_H_
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#define _NET_IF_VLAN_VAR_H_ 1
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struct ether_vlan_header {
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u_char evl_dhost[ETHER_ADDR_LEN];
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u_char evl_shost[ETHER_ADDR_LEN];
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u_int16_t evl_encap_proto;
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u_int16_t evl_tag;
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u_int16_t evl_proto;
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};
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#define EVL_VLID_MASK 0x0FFF
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#define EVL_PRI_MASK 0xE000
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#define EVL_VLANOFTAG(tag) ((tag) & EVL_VLID_MASK)
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#define EVL_PRIOFTAG(tag) (((tag) >> 13) & 7)
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#define EVL_CFIOFTAG(tag) (((tag) >> 12) & 1)
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#define EVL_MAKETAG(vlid, pri, cfi) \
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((((((pri) & 7) << 1) | ((cfi) & 1)) << 12) | ((vlid) & EVL_VLID_MASK))
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/* Set the VLAN ID in an mbuf packet header non-destructively. */
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#define EVL_APPLY_VLID(m, vlid) \
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do { \
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if ((m)->m_flags & M_VLANTAG) { \
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(m)->m_pkthdr.ether_vtag &= EVL_VLID_MASK; \
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(m)->m_pkthdr.ether_vtag |= (vlid); \
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} else { \
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(m)->m_pkthdr.ether_vtag = (vlid); \
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(m)->m_flags |= M_VLANTAG; \
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} \
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} while (0)
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/* Set the priority ID in an mbuf packet header non-destructively. */
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#define EVL_APPLY_PRI(m, pri) \
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do { \
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if ((m)->m_flags & M_VLANTAG) { \
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uint16_t __vlantag = (m)->m_pkthdr.ether_vtag; \
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(m)->m_pkthdr.ether_vtag |= EVL_MAKETAG( \
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EVL_VLANOFTAG(__vlantag), (pri), \
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EVL_CFIOFTAG(__vlantag)); \
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} else { \
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(m)->m_pkthdr.ether_vtag = \
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EVL_MAKETAG(0, (pri), 0); \
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(m)->m_flags |= M_VLANTAG; \
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} \
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} while (0)
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/* sysctl(3) tags, for compatibility purposes */
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#define VLANCTL_PROTO 1
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#define VLANCTL_MAX 2
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/*
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* Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls.
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*/
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struct vlanreq {
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char vlr_parent[IFNAMSIZ];
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u_short vlr_tag;
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};
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#define SIOCSETVLAN SIOCSIFGENERIC
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#define SIOCGETVLAN SIOCGIFGENERIC
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#ifdef _KERNEL
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/*
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* Drivers that are capable of adding and removing the VLAN header
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* in hardware indicate they support this by marking IFCAP_VLAN_HWTAGGING
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* in if_capabilities. Drivers for hardware that is capable
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* of handling larger MTU's that may include a software-appended
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* VLAN header w/o lowering the normal MTU should mark IFCAP_VLAN_MTU
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* in if_capabilities; this notifies the VLAN code it can leave the
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* MTU on the vlan interface at the normal setting.
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*/
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/*
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* VLAN tags are stored in host byte order. Byte swapping may be
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* necessary.
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*
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* Drivers that support hardware VLAN tag stripping fill in the
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* received VLAN tag (containing both vlan and priority information)
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* into the ether_vtag mbuf packet header field:
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*
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* m->m_pkthdr.ether_vtag = vtag; // ntohs()?
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* m->m_flags |= M_VLANTAG;
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*
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* to mark the packet m with the specified VLAN tag.
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*
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* On output the driver should check the mbuf for the M_VLANTAG
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* flag to see if a VLAN tag is present and valid:
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*
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* if (m->m_flags & M_VLANTAG) {
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* ... = m->m_pkthdr.ether_vtag; // htons()?
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* ... pass tag to hardware ...
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* }
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*
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* Note that a driver must indicate it supports hardware VLAN
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* stripping/insertion by marking IFCAP_VLAN_HWTAGGING in
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* if_capabilities.
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*/
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#define VLAN_CAPABILITIES(_ifp) do { \
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if ((_ifp)->if_vlantrunk != NULL) \
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(*vlan_trunk_cap_p)(_ifp); \
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} while (0)
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#define VLAN_TRUNKDEV(_ifp) \
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(_ifp)->if_type == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL
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#define VLAN_TAG(_ifp, _vid) \
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(_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL
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#define VLAN_COOKIE(_ifp) \
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(_ifp)->if_type == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL
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#define VLAN_SETCOOKIE(_ifp, _cookie) \
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(_ifp)->if_type == IFT_L2VLAN ? \
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(*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL
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#define VLAN_DEVAT(_ifp, _vid) \
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(_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_vid)) : NULL
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extern void (*vlan_trunk_cap_p)(struct ifnet *);
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extern struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
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extern struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
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extern int (*vlan_tag_p)(struct ifnet *, uint16_t *);
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extern int (*vlan_setcookie_p)(struct ifnet *, void *);
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extern void *(*vlan_cookie_p)(struct ifnet *);
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#ifdef _SYS_EVENTHANDLER_H_
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/* VLAN state change events */
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typedef void (*vlan_config_fn)(void *, struct ifnet *, uint16_t);
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typedef void (*vlan_unconfig_fn)(void *, struct ifnet *, uint16_t);
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EVENTHANDLER_DECLARE(vlan_config, vlan_config_fn);
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EVENTHANDLER_DECLARE(vlan_unconfig, vlan_unconfig_fn);
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#endif /* _SYS_EVENTHANDLER_H_ */
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#endif /* _KERNEL */
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#endif /* _NET_IF_VLAN_VAR_H_ */
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