1139823Simp/*- 234649Swollman * Copyright 1998 Massachusetts Institute of Technology 334649Swollman * 434649Swollman * Permission to use, copy, modify, and distribute this software and 534649Swollman * its documentation for any purpose and without fee is hereby 634649Swollman * granted, provided that both the above copyright notice and this 734649Swollman * permission notice appear in all copies, that both the above 834649Swollman * copyright notice and this permission notice appear in all 934649Swollman * supporting documentation, and that the name of M.I.T. not be used 1034649Swollman * in advertising or publicity pertaining to distribution of the 1134649Swollman * software without specific, written prior permission. M.I.T. makes 1234649Swollman * no representations about the suitability of this software for any 1334649Swollman * purpose. It is provided "as is" without express or implied 1434649Swollman * warranty. 1534649Swollman * 1634649Swollman * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 1734649Swollman * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 1834649Swollman * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 1934649Swollman * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 2034649Swollman * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2134649Swollman * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2234649Swollman * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 2334649Swollman * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 2434649Swollman * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 2534649Swollman * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 2634649Swollman * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2734649Swollman * SUCH DAMAGE. 2834649Swollman * 2950477Speter * $FreeBSD$ 3034649Swollman */ 3134649Swollman 3234649Swollman#ifndef _NET_IF_VLAN_VAR_H_ 3334649Swollman#define _NET_IF_VLAN_VAR_H_ 1 3434649Swollman 3534649Swollmanstruct ether_vlan_header { 3634649Swollman u_char evl_dhost[ETHER_ADDR_LEN]; 3734649Swollman u_char evl_shost[ETHER_ADDR_LEN]; 3834649Swollman u_int16_t evl_encap_proto; 3934649Swollman u_int16_t evl_tag; 4034649Swollman u_int16_t evl_proto; 4134649Swollman}; 4234649Swollman 43167126Sbms#define EVL_VLID_MASK 0x0FFF 44167126Sbms#define EVL_PRI_MASK 0xE000 45167126Sbms#define EVL_VLANOFTAG(tag) ((tag) & EVL_VLID_MASK) 46167126Sbms#define EVL_PRIOFTAG(tag) (((tag) >> 13) & 7) 47167126Sbms#define EVL_CFIOFTAG(tag) (((tag) >> 12) & 1) 48167126Sbms#define EVL_MAKETAG(vlid, pri, cfi) \ 49167126Sbms ((((((pri) & 7) << 1) | ((cfi) & 1)) << 12) | ((vlid) & EVL_VLID_MASK)) 5034649Swollman 51167126Sbms/* Set the VLAN ID in an mbuf packet header non-destructively. */ 52167126Sbms#define EVL_APPLY_VLID(m, vlid) \ 53167126Sbms do { \ 54167126Sbms if ((m)->m_flags & M_VLANTAG) { \ 55167126Sbms (m)->m_pkthdr.ether_vtag &= EVL_VLID_MASK; \ 56167126Sbms (m)->m_pkthdr.ether_vtag |= (vlid); \ 57167126Sbms } else { \ 58167126Sbms (m)->m_pkthdr.ether_vtag = (vlid); \ 59167126Sbms (m)->m_flags |= M_VLANTAG; \ 60167126Sbms } \ 61167126Sbms } while (0) 62167126Sbms 63167126Sbms/* Set the priority ID in an mbuf packet header non-destructively. */ 64167126Sbms#define EVL_APPLY_PRI(m, pri) \ 65167126Sbms do { \ 66167126Sbms if ((m)->m_flags & M_VLANTAG) { \ 67167126Sbms uint16_t __vlantag = (m)->m_pkthdr.ether_vtag; \ 68167126Sbms (m)->m_pkthdr.ether_vtag |= EVL_MAKETAG( \ 69167126Sbms EVL_VLANOFTAG(__vlantag), (pri), \ 70167126Sbms EVL_CFIOFTAG(__vlantag)); \ 71167126Sbms } else { \ 72167126Sbms (m)->m_pkthdr.ether_vtag = \ 73167126Sbms EVL_MAKETAG(0, (pri), 0); \ 74167126Sbms (m)->m_flags |= M_VLANTAG; \ 75167126Sbms } \ 76167126Sbms } while (0) 77167126Sbms 7834649Swollman/* sysctl(3) tags, for compatibility purposes */ 7934649Swollman#define VLANCTL_PROTO 1 8034649Swollman#define VLANCTL_MAX 2 8134649Swollman 8234649Swollman/* 8334649Swollman * Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls. 8434649Swollman */ 8534649Swollmanstruct vlanreq { 8634649Swollman char vlr_parent[IFNAMSIZ]; 8734649Swollman u_short vlr_tag; 8834649Swollman}; 8934649Swollman#define SIOCSETVLAN SIOCSIFGENERIC 9034649Swollman#define SIOCGETVLAN SIOCGIFGENERIC 9134649Swollman 92106932Ssam#ifdef _KERNEL 93106932Ssam/* 94106932Ssam * Drivers that are capable of adding and removing the VLAN header 95106932Ssam * in hardware indicate they support this by marking IFCAP_VLAN_HWTAGGING 96124683Syar * in if_capabilities. Drivers for hardware that is capable 97106932Ssam * of handling larger MTU's that may include a software-appended 98124683Syar * VLAN header w/o lowering the normal MTU should mark IFCAP_VLAN_MTU 99124683Syar * in if_capabilities; this notifies the VLAN code it can leave the 100106932Ssam * MTU on the vlan interface at the normal setting. 101106932Ssam */ 102106932Ssam 103106932Ssam/* 104162375Sandre * VLAN tags are stored in host byte order. Byte swapping may be 105162375Sandre * necessary. 106106932Ssam * 107162375Sandre * Drivers that support hardware VLAN tag stripping fill in the 108162375Sandre * received VLAN tag (containing both vlan and priority information) 109162375Sandre * into the ether_vtag mbuf packet header field: 110162375Sandre * 111230026Srwatson * m->m_pkthdr.ether_vtag = vtag; // ntohs()? 112162375Sandre * m->m_flags |= M_VLANTAG; 113106932Ssam * 114162375Sandre * to mark the packet m with the specified VLAN tag. 115106932Ssam * 116162375Sandre * On output the driver should check the mbuf for the M_VLANTAG 117162375Sandre * flag to see if a VLAN tag is present and valid: 118162375Sandre * 119162375Sandre * if (m->m_flags & M_VLANTAG) { 120162375Sandre * ... = m->m_pkthdr.ether_vtag; // htons()? 121106932Ssam * ... pass tag to hardware ... 122106932Ssam * } 123106932Ssam * 124106932Ssam * Note that a driver must indicate it supports hardware VLAN 125162375Sandre * stripping/insertion by marking IFCAP_VLAN_HWTAGGING in 126162375Sandre * if_capabilities. 127106932Ssam */ 128106932Ssam 129155051Sglebius#define VLAN_CAPABILITIES(_ifp) do { \ 130155051Sglebius if ((_ifp)->if_vlantrunk != NULL) \ 131155051Sglebius (*vlan_trunk_cap_p)(_ifp); \ 132155051Sglebius} while (0) 133155051Sglebius 134219819Sjeff#define VLAN_TRUNKDEV(_ifp) \ 135219819Sjeff (_ifp)->if_type == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL 136230026Srwatson#define VLAN_TAG(_ifp, _vid) \ 137230026Srwatson (_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL 138219819Sjeff#define VLAN_COOKIE(_ifp) \ 139219819Sjeff (_ifp)->if_type == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL 140219819Sjeff#define VLAN_SETCOOKIE(_ifp, _cookie) \ 141219819Sjeff (_ifp)->if_type == IFT_L2VLAN ? \ 142219819Sjeff (*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL 143230026Srwatson#define VLAN_DEVAT(_ifp, _vid) \ 144230026Srwatson (_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_vid)) : NULL 145219819Sjeff 146155051Sglebiusextern void (*vlan_trunk_cap_p)(struct ifnet *); 147219819Sjeffextern struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 148219819Sjeffextern struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 149219819Sjeffextern int (*vlan_tag_p)(struct ifnet *, uint16_t *); 150219819Sjeffextern int (*vlan_setcookie_p)(struct ifnet *, void *); 151219819Sjeffextern void *(*vlan_cookie_p)(struct ifnet *); 152219819Sjeff 153106932Ssam#endif /* _KERNEL */ 154106932Ssam 15534649Swollman#endif /* _NET_IF_VLAN_VAR_H_ */ 156