1 | /* |
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2 | * Copyright (c) 1985, 1986, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 4. Neither the name of the University nor the names of its contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT 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 | * @(#)in_var.h 8.2 (Berkeley) 1/9/95 |
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30 | * $FreeBSD: src/sys/netinet/in_var.h,v 1.52 2004/10/19 21:06:14 andre Exp $ |
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31 | */ |
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32 | |
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33 | #ifndef _NETINET_IN_VAR_H_ |
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34 | #define _NETINET_IN_VAR_H_ |
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35 | |
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36 | #include <sys/queue.h> |
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37 | #if !defined(__rtems__) |
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38 | #include <sys/fnv_hash.h> |
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39 | #endif |
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40 | |
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41 | /* |
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42 | * Interface address, Internet version. One of these structures |
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43 | * is allocated for each Internet address on an interface. |
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44 | * The ifaddr structure contains the protocol-independent part |
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45 | * of the structure and is assumed to be first. |
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46 | */ |
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47 | struct in_ifaddr { |
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48 | struct ifaddr ia_ifa; /* protocol-independent info */ |
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49 | #define ia_ifp ia_ifa.ifa_ifp |
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50 | #define ia_flags ia_ifa.ifa_flags |
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51 | /* ia_{,sub}net{,mask} in host order */ |
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52 | u_long ia_net; /* network number of interface */ |
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53 | u_long ia_netmask; /* mask of net part */ |
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54 | u_long ia_subnet; /* subnet number, including net */ |
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55 | u_long ia_subnetmask; /* mask of subnet part */ |
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56 | struct in_addr ia_netbroadcast; /* to recognize net broadcasts */ |
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57 | struct in_ifaddr *ia_next; /* next in list of internet addresses */ |
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58 | struct sockaddr_in ia_addr; /* reserve space for interface name */ |
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59 | struct sockaddr_in ia_dstaddr; /* reserve space for broadcast addr */ |
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60 | #define ia_broadaddr ia_dstaddr |
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61 | struct sockaddr_in ia_sockmask; /* reserve space for general netmask */ |
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62 | LIST_HEAD(in_multihead, in_multi) ia_multiaddrs; |
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63 | /* list of multicast addresses */ |
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64 | }; |
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65 | |
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66 | struct in_aliasreq { |
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67 | char ifra_name[IFNAMSIZ]; /* if name, e.g. "en0" */ |
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68 | struct sockaddr_in ifra_addr; |
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69 | struct sockaddr_in ifra_broadaddr; |
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70 | #define ifra_dstaddr ifra_broadaddr |
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71 | struct sockaddr_in ifra_mask; |
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72 | }; |
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73 | /* |
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74 | * Given a pointer to an in_ifaddr (ifaddr), |
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75 | * return a pointer to the addr as a sockaddr_in. |
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76 | */ |
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77 | #define IA_SIN(ia) (&(((struct in_ifaddr *)(ia))->ia_addr)) |
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78 | #define IA_DSTSIN(ia) (&(((struct in_ifaddr *)(ia))->ia_dstaddr)) |
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79 | |
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80 | #define IN_LNAOF(in, ifa) \ |
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81 | ((ntohl((in).s_addr) & ~((struct in_ifaddr *)(ifa)->ia_subnetmask)) |
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82 | |
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83 | |
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84 | #ifdef _KERNEL |
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85 | extern struct in_ifaddr *in_ifaddr; |
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86 | extern struct ifqueue ipintrq; /* ip packet input queue */ |
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87 | extern struct in_addr zeroin_addr; |
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88 | extern u_char inetctlerrmap[]; |
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89 | extern int rtq_reallyold; /* XXX */ |
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90 | extern int rtq_minreallyold; /* XXX */ |
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91 | extern int rtq_toomany; /* XXX */ |
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92 | |
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93 | /* |
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94 | * Macro for finding the interface (ifnet structure) corresponding to one |
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95 | * of our IP addresses. |
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96 | */ |
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97 | #define INADDR_TO_IFP(addr, ifp) \ |
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98 | /* struct in_addr addr; */ \ |
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99 | /* struct ifnet *ifp; */ \ |
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100 | { \ |
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101 | register struct in_ifaddr *ia; \ |
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102 | \ |
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103 | for (ia = in_ifaddr; \ |
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104 | ia != NULL && ((ia->ia_ifp->if_flags & IFF_POINTOPOINT)? \ |
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105 | IA_DSTSIN(ia):IA_SIN(ia))->sin_addr.s_addr != (addr).s_addr; \ |
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106 | ia = ia->ia_next) \ |
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107 | continue; \ |
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108 | if (ia == NULL) \ |
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109 | for (ia = in_ifaddr; \ |
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110 | ia != NULL; \ |
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111 | ia = ia->ia_next) \ |
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112 | if (ia->ia_ifp->if_flags & IFF_POINTOPOINT && \ |
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113 | IA_SIN(ia)->sin_addr.s_addr == (addr).s_addr) \ |
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114 | break; \ |
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115 | (ifp) = (ia == NULL) ? NULL : ia->ia_ifp; \ |
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116 | } |
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117 | |
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118 | /* |
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119 | * Macro for finding the internet address structure (in_ifaddr) corresponding |
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120 | * to a given interface (ifnet structure). |
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121 | */ |
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122 | #define IFP_TO_IA(ifp, ia) \ |
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123 | /* struct ifnet *ifp; */ \ |
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124 | /* struct in_ifaddr *ia; */ \ |
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125 | { \ |
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126 | for ((ia) = in_ifaddr; \ |
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127 | (ia) != NULL && (ia)->ia_ifp != (ifp); \ |
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128 | (ia) = (ia)->ia_next) \ |
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129 | continue; \ |
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130 | } |
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131 | #endif |
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132 | |
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133 | /* |
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134 | * This information should be part of the ifnet structure but we don't wish |
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135 | * to change that - as it might break a number of things |
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136 | */ |
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137 | |
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138 | struct router_info { |
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139 | struct ifnet *rti_ifp; |
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140 | int rti_type; /* type of router which is querier on this interface */ |
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141 | int rti_time; /* # of slow timeouts since last old query */ |
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142 | struct router_info *rti_next; |
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143 | }; |
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144 | |
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145 | /* |
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146 | * Internet multicast address structure. There is one of these for each IP |
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147 | * multicast group to which this host belongs on a given network interface. |
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148 | * They are kept in a linked list, rooted in the interface's in_ifaddr |
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149 | * structure. |
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150 | */ |
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151 | struct in_multi { |
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152 | LIST_ENTRY(in_multi) inm_entry; /* list glue */ |
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153 | struct in_addr inm_addr; /* IP multicast address */ |
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154 | struct ifnet *inm_ifp; /* back pointer to ifnet */ |
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155 | struct in_ifaddr *inm_ia; /* back pointer to in_ifaddr */ |
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156 | u_int inm_refcount; /* no. membership claims by sockets */ |
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157 | u_int inm_timer; /* IGMP membership report timer */ |
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158 | u_int inm_state; /* state of the membership */ |
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159 | struct router_info *inm_rti; /* router info*/ |
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160 | }; |
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161 | |
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162 | #ifdef _KERNEL |
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163 | |
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164 | #ifdef SYSCTL_DECL |
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165 | SYSCTL_DECL(_net_inet_ip); |
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166 | SYSCTL_DECL(_net_inet_raw); |
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167 | #endif |
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168 | |
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169 | /* |
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170 | * Structure used by macros below to remember position when stepping through |
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171 | * all of the in_multi records. |
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172 | */ |
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173 | struct in_multistep { |
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174 | struct in_ifaddr *i_ia; |
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175 | struct in_multi *i_inm; |
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176 | }; |
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177 | |
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178 | /* |
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179 | * Macro for looking up the in_multi record for a given IP multicast address |
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180 | * on a given interface. If no matching record is found, "inm" returns NULL. |
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181 | */ |
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182 | #define IN_LOOKUP_MULTI(addr, ifp, inm) \ |
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183 | /* struct in_addr addr; */ \ |
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184 | /* struct ifnet *ifp; */ \ |
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185 | /* struct in_multi *inm; */ \ |
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186 | { \ |
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187 | register struct in_ifaddr *ia; \ |
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188 | \ |
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189 | IFP_TO_IA((ifp), ia); \ |
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190 | if (ia == NULL) \ |
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191 | (inm) = NULL; \ |
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192 | else \ |
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193 | for ((inm) = ia->ia_multiaddrs.lh_first; \ |
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194 | (inm) != NULL && (inm)->inm_addr.s_addr != (addr).s_addr; \ |
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195 | (inm) = inm->inm_entry.le_next) \ |
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196 | continue; \ |
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197 | } |
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198 | |
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199 | /* |
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200 | * Macro to step through all of the in_multi records, one at a time. |
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201 | * The current position is remembered in "step", which the caller must |
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202 | * provide. IN_FIRST_MULTI(), below, must be called to initialize "step" |
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203 | * and get the first record. Both macros return a NULL "inm" when there |
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204 | * are no remaining records. |
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205 | */ |
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206 | #define IN_NEXT_MULTI(step, inm) \ |
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207 | /* struct in_multistep step; */ \ |
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208 | /* struct in_multi *inm; */ \ |
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209 | { \ |
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210 | if (((inm) = (step).i_inm) != NULL) \ |
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211 | (step).i_inm = (inm)->inm_entry.le_next; \ |
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212 | else \ |
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213 | while ((step).i_ia != NULL) { \ |
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214 | (inm) = (step).i_ia->ia_multiaddrs.lh_first; \ |
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215 | (step).i_ia = (step).i_ia->ia_next; \ |
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216 | if ((inm) != NULL) { \ |
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217 | (step).i_inm = (inm)->inm_entry.le_next; \ |
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218 | break; \ |
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219 | } \ |
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220 | } \ |
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221 | } |
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222 | |
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223 | #define IN_FIRST_MULTI(step, inm) \ |
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224 | /* struct in_multistep step; */ \ |
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225 | /* struct in_multi *inm; */ \ |
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226 | { \ |
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227 | (step).i_ia = in_ifaddr; \ |
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228 | (step).i_inm = NULL; \ |
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229 | IN_NEXT_MULTI((step), (inm)); \ |
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230 | } |
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231 | |
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232 | struct in_multi *in_addmulti __P((struct in_addr *, struct ifnet *)); |
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233 | void in_delmulti __P((struct in_multi *)); |
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234 | int in_control __P((struct socket *, u_long, caddr_t, struct ifnet *)); |
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235 | void in_rtqdrain __P((void)); |
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236 | void ip_input __P((struct mbuf *)); |
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237 | |
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238 | #endif /* _KERNEL */ |
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239 | |
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240 | #endif /* _NETINET_IN_VAR_H_ */ |
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