Current Path : /sys/net/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/net/if_vlan_var.h |
/*- * 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: release/9.1.0/sys/net/if_vlan_var.h 219819 2011-03-21 09:40:01Z jeff $ */ #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 = vlan_id; // 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, _tag) \ (_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_tag)) : 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, _tag) \ (_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_tag)) : 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_ */