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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
#include <sys/mbuf.h>
/* 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;
u_short vlr_proto;
};
#define SIOCSETVLAN SIOCSIFGENERIC
#define SIOCGETVLAN SIOCGIFGENERIC
#define SIOCGVLANPCP SIOCGLANPCP /* Get VLAN PCP */
#define SIOCSVLANPCP SIOCSLANPCP /* Set VLAN PCP */
#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.
*/
/*
* The 802.1q code may also tag mbufs with the PCP (priority) field for use in
* other layers of the stack, in which case an m_tag will be used. This is
* semantically quite different from use of the ether_vtag field, which is
* defined only between the device driver and VLAN layer.
*/
#define MTAG_8021Q 1326104895
#define MTAG_8021Q_PCP_IN 0 /* Input priority. */
#define MTAG_8021Q_PCP_OUT 1 /* Output priority. */
#define VLAN_PCP_MAX 7
#define DOT1Q_VID_NULL 0x0
#define DOT1Q_VID_DEF_PVID 0x1
#define DOT1Q_VID_DEF_SR_PVID 0x2
#define DOT1Q_VID_RSVD_IMPL 0xfff
/*
* 802.1q full tag. Proto and vid are stored in host byte order.
*/
struct ether_8021q_tag {
uint16_t proto;
uint16_t vid;
uint8_t pcp;
};
#define VLAN_CAPABILITIES(_ifp) do { \
if (if_getvlantrunk(_ifp) != NULL) \
(*vlan_trunk_cap_p)(_ifp); \
} while (0)
#define VLAN_TRUNKDEV(_ifp) \
(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL)
#define VLAN_TAG(_ifp, _vid) \
(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL)
#define VLAN_PCP(_ifp, _pcp) \
(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_pcp_p)((_ifp), (_pcp)) : EINVAL)
#define VLAN_COOKIE(_ifp) \
(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL)
#define VLAN_SETCOOKIE(_ifp, _cookie) \
(if_gettype(_ifp) == IFT_L2VLAN ? \
(*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL)
#define VLAN_DEVAT(_ifp, _vid) \
(if_getvlantrunk(_ifp) != 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_pcp_p)(struct ifnet *, uint16_t *);
extern int (*vlan_setcookie_p)(struct ifnet *, void *);
extern void *(*vlan_cookie_p)(struct ifnet *);
#include <sys/_eventhandler.h>
/* VLAN state change events */
typedef void (*vlan_config_fn)(void *, struct ifnet *, uint16_t);
typedef void (*vlan_unconfig_fn)(void *, struct ifnet *, uint16_t);
EVENTHANDLER_DECLARE(vlan_config, vlan_config_fn);
EVENTHANDLER_DECLARE(vlan_unconfig, vlan_unconfig_fn);
static inline int
vlan_set_pcp(struct mbuf *m, uint8_t prio)
{
struct m_tag *mtag;
KASSERT(prio <= VLAN_PCP_MAX,
("%s with invalid pcp", __func__));
mtag = m_tag_locate(m, MTAG_8021Q, MTAG_8021Q_PCP_OUT, NULL);
if (mtag == NULL) {
mtag = m_tag_alloc(MTAG_8021Q, MTAG_8021Q_PCP_OUT,
sizeof(uint8_t), M_NOWAIT);
if (mtag == NULL)
return (ENOMEM);
m_tag_prepend(m, mtag);
}
*(uint8_t *)(mtag + 1) = prio;
return (0);
}
#endif /* _KERNEL */
#endif /* _NET_IF_VLAN_VAR_H_ */
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