/*- * 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. */ #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 /* * 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 *); extern void (*vlan_input_p)(struct ifnet *, struct mbuf *); #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_ */
