Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net/if_vlan_var.h
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1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: releng/11.1/sys/net/if_vlan_var.h 301496 2016-06-06 09:51:58Z araujo $ 30 */ 31 32 #ifndef _NET_IF_VLAN_VAR_H_ 33 #define _NET_IF_VLAN_VAR_H_ 1 34 35 /* Set the VLAN ID in an mbuf packet header non-destructively. */ 36 #define EVL_APPLY_VLID(m, vlid) \ 37 do { \ 38 if ((m)->m_flags & M_VLANTAG) { \ 39 (m)->m_pkthdr.ether_vtag &= EVL_VLID_MASK; \ 40 (m)->m_pkthdr.ether_vtag |= (vlid); \ 41 } else { \ 42 (m)->m_pkthdr.ether_vtag = (vlid); \ 43 (m)->m_flags |= M_VLANTAG; \ 44 } \ 45 } while (0) 46 47 /* Set the priority ID in an mbuf packet header non-destructively. */ 48 #define EVL_APPLY_PRI(m, pri) \ 49 do { \ 50 if ((m)->m_flags & M_VLANTAG) { \ 51 uint16_t __vlantag = (m)->m_pkthdr.ether_vtag; \ 52 (m)->m_pkthdr.ether_vtag |= EVL_MAKETAG( \ 53 EVL_VLANOFTAG(__vlantag), (pri), \ 54 EVL_CFIOFTAG(__vlantag)); \ 55 } else { \ 56 (m)->m_pkthdr.ether_vtag = \ 57 EVL_MAKETAG(0, (pri), 0); \ 58 (m)->m_flags |= M_VLANTAG; \ 59 } \ 60 } while (0) 61 62 /* sysctl(3) tags, for compatibility purposes */ 63 #define VLANCTL_PROTO 1 64 #define VLANCTL_MAX 2 65 66 /* 67 * Configuration structure for SIOCSETVLAN and SIOCGETVLAN ioctls. 68 */ 69 struct vlanreq { 70 char vlr_parent[IFNAMSIZ]; 71 u_short vlr_tag; 72 }; 73 #define SIOCSETVLAN SIOCSIFGENERIC 74 #define SIOCGETVLAN SIOCGIFGENERIC 75 76 #define SIOCGVLANPCP _IOWR('i', 152, struct ifreq) /* Get VLAN PCP */ 77 #define SIOCSVLANPCP _IOW('i', 153, struct ifreq) /* Set VLAN PCP */ 78 79 /* 80 * Names for 802.1q priorities ("802.1p"). Notice that in this scheme, 81 * (0 < 1), allowing default 0-tagged traffic to take priority over background 82 * tagged traffic. 83 */ 84 #define IEEE8021Q_PCP_BK 1 /* Background (lowest) */ 85 #define IEEE8021Q_PCP_BE 0 /* Best effort (default) */ 86 #define IEEE8021Q_PCP_EE 2 /* Excellent effort */ 87 #define IEEE8021Q_PCP_CA 3 /* Critical applications */ 88 #define IEEE8021Q_PCP_VI 4 /* Video, < 100ms latency */ 89 #define IEEE8021Q_PCP_VO 5 /* Video, < 10ms latency */ 90 #define IEEE8021Q_PCP_IC 6 /* Internetwork control */ 91 #define IEEE8021Q_PCP_NC 7 /* Network control (highest) */ 92 93 #ifdef _KERNEL 94 /* 95 * Drivers that are capable of adding and removing the VLAN header 96 * in hardware indicate they support this by marking IFCAP_VLAN_HWTAGGING 97 * in if_capabilities. Drivers for hardware that is capable 98 * of handling larger MTU's that may include a software-appended 99 * VLAN header w/o lowering the normal MTU should mark IFCAP_VLAN_MTU 100 * in if_capabilities; this notifies the VLAN code it can leave the 101 * MTU on the vlan interface at the normal setting. 102 */ 103 104 /* 105 * VLAN tags are stored in host byte order. Byte swapping may be 106 * necessary. 107 * 108 * Drivers that support hardware VLAN tag stripping fill in the 109 * received VLAN tag (containing both vlan and priority information) 110 * into the ether_vtag mbuf packet header field: 111 * 112 * m->m_pkthdr.ether_vtag = vtag; // ntohs()? 113 * m->m_flags |= M_VLANTAG; 114 * 115 * to mark the packet m with the specified VLAN tag. 116 * 117 * On output the driver should check the mbuf for the M_VLANTAG 118 * flag to see if a VLAN tag is present and valid: 119 * 120 * if (m->m_flags & M_VLANTAG) { 121 * ... = m->m_pkthdr.ether_vtag; // htons()? 122 * ... pass tag to hardware ... 123 * } 124 * 125 * Note that a driver must indicate it supports hardware VLAN 126 * stripping/insertion by marking IFCAP_VLAN_HWTAGGING in 127 * if_capabilities. 128 */ 129 130 /* 131 * The 802.1q code may also tag mbufs with the PCP (priority) field for use in 132 * other layers of the stack, in which case an m_tag will be used. This is 133 * semantically quite different from use of the ether_vtag field, which is 134 * defined only between the device driver and VLAN layer. 135 */ 136 #define MTAG_8021Q 1326104895 137 #define MTAG_8021Q_PCP_IN 0 /* Input priority. */ 138 #define MTAG_8021Q_PCP_OUT 1 /* Output priority. */ 139 140 #define VLAN_CAPABILITIES(_ifp) do { \ 141 if ((_ifp)->if_vlantrunk != NULL) \ 142 (*vlan_trunk_cap_p)(_ifp); \ 143 } while (0) 144 145 #define VLAN_TRUNKDEV(_ifp) \ 146 (_ifp)->if_type == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL 147 #define VLAN_TAG(_ifp, _vid) \ 148 (_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL 149 #define VLAN_COOKIE(_ifp) \ 150 (_ifp)->if_type == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL 151 #define VLAN_SETCOOKIE(_ifp, _cookie) \ 152 (_ifp)->if_type == IFT_L2VLAN ? \ 153 (*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL 154 #define VLAN_DEVAT(_ifp, _vid) \ 155 (_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_vid)) : NULL 156 157 extern void (*vlan_trunk_cap_p)(struct ifnet *); 158 extern struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 159 extern struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 160 extern int (*vlan_tag_p)(struct ifnet *, uint16_t *); 161 extern int (*vlan_setcookie_p)(struct ifnet *, void *); 162 extern void *(*vlan_cookie_p)(struct ifnet *); 163 164 #ifdef _SYS_EVENTHANDLER_H_ 165 /* VLAN state change events */ 166 typedef void (*vlan_config_fn)(void *, struct ifnet *, uint16_t); 167 typedef void (*vlan_unconfig_fn)(void *, struct ifnet *, uint16_t); 168 EVENTHANDLER_DECLARE(vlan_config, vlan_config_fn); 169 EVENTHANDLER_DECLARE(vlan_unconfig, vlan_unconfig_fn); 170 #endif /* _SYS_EVENTHANDLER_H_ */ 171 172 #endif /* _KERNEL */ 173 174 #endif /* _NET_IF_VLAN_VAR_H_ */
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