diff options
Diffstat (limited to 'sys/net/if_vlan_var.h')
| -rw-r--r-- | sys/net/if_vlan_var.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/sys/net/if_vlan_var.h b/sys/net/if_vlan_var.h new file mode 100644 index 000000000000..695bb81f77b3 --- /dev/null +++ b/sys/net/if_vlan_var.h @@ -0,0 +1,198 @@ +/*- + * 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_ */ |