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