7983103ae6
802.1q-defined 16-bit VID, CFI, and PCP field in host by order) and a VLAN ID (VID). Tags go in packets. VIDs identify VLANs. No functional change is intended, so this should be safe to MFC. Further cleanup with functional changes will be committed separately (for example, renaming vlan_tag/vlan_tag_p, which modify the KPI and KBI). Reviewed by: bz Sponsored by: ADARA Networks, Inc. MFC after: 3 days
156 lines
5.4 KiB
C
156 lines
5.4 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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#endif /* _KERNEL */
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#endif /* _NET_IF_VLAN_VAR_H_ */
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