1 | /* |
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2 | * Copyright (c) 1982, 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 | * @(#)ip_var.h 8.2 (Berkeley) 1/9/95 |
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30 | * $FreeBSD: src/sys/netinet/ip_var.h,v 1.94 2005/01/07 01:45:44 imp Exp $ |
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31 | */ |
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32 | |
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33 | /* |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NETINET_IP_VAR_H_ |
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38 | #define _NETINET_IP_VAR_H_ |
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39 | |
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40 | /* |
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41 | * Overlay for ip header used by other protocols (tcp, udp). |
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42 | */ |
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43 | struct ipovly { |
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44 | caddr_t ih_next; |
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45 | caddr_t ih_prev; /* for protocol sequence q's */ |
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46 | u_char ih_x1; /* (unused) */ |
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47 | u_char ih_pr; /* protocol */ |
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48 | u_short ih_len; /* protocol length */ |
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49 | struct in_addr ih_src; /* source internet address */ |
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50 | struct in_addr ih_dst; /* destination internet address */ |
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51 | }; |
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52 | |
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53 | /* |
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54 | * Ip reassembly queue structure. Each fragment |
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55 | * being reassembled is attached to one of these structures. |
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56 | * They are timed out after ipq_ttl drops to 0, and may also |
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57 | * be reclaimed if memory becomes tight. |
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58 | */ |
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59 | struct ipq { |
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60 | struct ipq *next,*prev; /* to other reass headers */ |
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61 | u_char ipq_ttl; /* time for reass q to live */ |
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62 | u_char ipq_p; /* protocol of this fragment */ |
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63 | u_short ipq_id; /* sequence id for reassembly */ |
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64 | struct ipasfrag *ipq_next,*ipq_prev; |
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65 | /* to ip headers of fragments */ |
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66 | struct in_addr ipq_src,ipq_dst; |
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67 | #ifdef IPDIVERT |
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68 | u_short ipq_divert; /* divert protocol port */ |
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69 | #endif |
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70 | }; |
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71 | |
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72 | /* |
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73 | * Ip header, when holding a fragment. |
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74 | * |
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75 | * Note: ipf_next must be at same offset as ipq_next above |
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76 | */ |
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77 | struct ipasfrag { |
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78 | #if BYTE_ORDER == LITTLE_ENDIAN |
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79 | u_char ip_hl:4, |
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80 | ip_v:4; |
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81 | #endif |
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82 | #if BYTE_ORDER == BIG_ENDIAN |
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83 | u_char ip_v:4, |
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84 | ip_hl:4; |
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85 | #endif |
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86 | u_char ipf_mff; /* XXX overlays ip_tos: use low bit |
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87 | * to avoid destroying tos; |
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88 | * copied from (ip_off&IP_MF) */ |
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89 | u_short ip_len; |
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90 | u_short ip_id; |
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91 | u_short ip_off; |
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92 | u_char ip_ttl; |
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93 | u_char ip_p; |
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94 | u_short ip_sum; |
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95 | struct ipasfrag *ipf_next; /* next fragment */ |
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96 | struct ipasfrag *ipf_prev; /* previous fragment */ |
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97 | }; |
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98 | |
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99 | /* |
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100 | * Structure stored in mbuf in inpcb.ip_options |
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101 | * and passed to ip_output when ip options are in use. |
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102 | * The actual length of the options (including ipopt_dst) |
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103 | * is in m_len. |
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104 | */ |
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105 | #define MAX_IPOPTLEN 40 |
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106 | |
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107 | struct ipoption { |
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108 | struct in_addr ipopt_dst; /* first-hop dst if source routed */ |
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109 | char ipopt_list[MAX_IPOPTLEN]; /* options proper */ |
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110 | }; |
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111 | |
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112 | /* |
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113 | * Structure attached to inpcb.ip_moptions and |
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114 | * passed to ip_output when IP multicast options are in use. |
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115 | */ |
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116 | struct ip_moptions { |
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117 | struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */ |
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118 | u_char imo_multicast_ttl; /* TTL for outgoing multicasts */ |
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119 | u_char imo_multicast_loop; /* 1 => hear sends if a member */ |
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120 | u_short imo_num_memberships; /* no. memberships this socket */ |
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121 | struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS]; |
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122 | u_long imo_multicast_vif; /* vif num outgoing multicasts */ |
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123 | }; |
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124 | |
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125 | struct ipstat { |
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126 | u_long ips_total; /* total packets received */ |
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127 | u_long ips_badsum; /* checksum bad */ |
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128 | u_long ips_tooshort; /* packet too short */ |
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129 | u_long ips_toosmall; /* not enough data */ |
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130 | u_long ips_badhlen; /* ip header length < data size */ |
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131 | u_long ips_badlen; /* ip length < ip header length */ |
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132 | u_long ips_fragments; /* fragments received */ |
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133 | u_long ips_fragdropped; /* frags dropped (dups, out of space) */ |
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134 | u_long ips_fragtimeout; /* fragments timed out */ |
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135 | u_long ips_forward; /* packets forwarded */ |
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136 | u_long ips_cantforward; /* packets rcvd for unreachable dest */ |
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137 | u_long ips_redirectsent; /* packets forwarded on same net */ |
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138 | u_long ips_noproto; /* unknown or unsupported protocol */ |
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139 | u_long ips_delivered; /* datagrams delivered to upper level*/ |
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140 | u_long ips_localout; /* total ip packets generated here */ |
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141 | u_long ips_odropped; /* lost packets due to nobufs, etc. */ |
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142 | u_long ips_reassembled; /* total packets reassembled ok */ |
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143 | u_long ips_fragmented; /* datagrams successfully fragmented */ |
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144 | u_long ips_ofragments; /* output fragments created */ |
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145 | u_long ips_cantfrag; /* don't fragment flag was set, etc. */ |
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146 | u_long ips_badoptions; /* error in option processing */ |
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147 | u_long ips_noroute; /* packets discarded due to no route */ |
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148 | u_long ips_badvers; /* ip version != 4 */ |
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149 | u_long ips_rawout; /* total raw ip packets generated */ |
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150 | u_long ips_toolong; /* ip length > max ip packet size */ |
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151 | }; |
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152 | |
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153 | #ifdef _KERNEL |
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154 | /* flags passed to ip_output as last parameter */ |
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155 | #define IP_FORWARDING 0x1 /* most of ip header exists */ |
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156 | #define IP_RAWOUTPUT 0x2 /* raw ip header exists */ |
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157 | #define IP_SENDONES 0x4 /* send all-ones broadcast */ |
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158 | #define IP_ROUTETOIF SO_DONTROUTE /* bypass routing tables */ |
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159 | #define IP_ALLOWBROADCAST SO_BROADCAST /* can send broadcast packets */ |
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160 | |
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161 | struct ip; |
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162 | struct inpcb; |
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163 | struct route; |
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164 | struct sockopt; |
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165 | struct mbuf; |
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166 | |
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167 | extern struct ipstat ipstat; |
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168 | extern u_short ip_id; /* ip packet ctr, for ids */ |
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169 | extern int ip_defttl; /* default IP ttl */ |
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170 | extern u_char ip_protox[]; |
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171 | extern struct socket *ip_rsvpd; /* reservation protocol daemon */ |
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172 | extern struct socket *ip_mrouter; /* multicast routing daemon */ |
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173 | extern int (*legal_vif_num)(int); |
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174 | extern u_long (*ip_mcast_src)(int); |
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175 | extern int rsvp_on; |
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176 | |
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177 | int ip_ctloutput(int, struct socket *, int, int, struct mbuf **); |
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178 | void ip_drain(void); |
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179 | void ip_freemoptions(struct ip_moptions *); |
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180 | void ip_init(void); |
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181 | extern int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *, |
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182 | struct ip_moptions *); |
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183 | int ip_output(struct mbuf *, |
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184 | struct mbuf *, struct route *, int, struct ip_moptions *); |
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185 | void ip_savecontrol(struct inpcb *, struct mbuf **, struct ip *, |
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186 | struct mbuf *); |
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187 | void ip_slowtimo(void); |
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188 | struct mbuf * |
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189 | ip_srcroute(void); |
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190 | void ip_stripoptions(struct mbuf *, struct mbuf *); |
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191 | int rip_ctloutput(int, struct socket *, int, int, struct mbuf **); |
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192 | void rip_init(void); |
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193 | void rip_input(struct mbuf *, int); |
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194 | int rip_output(struct mbuf *, struct socket *, u_long); |
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195 | int rip_usrreq(struct socket *, |
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196 | int, struct mbuf *, struct mbuf *, struct mbuf *); |
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197 | void ipip_input(struct mbuf *, int); |
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198 | void rsvp_input(struct mbuf *, int); |
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199 | int ip_rsvp_init(struct socket *); |
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200 | int ip_rsvp_done(void); |
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201 | int ip_rsvp_vif_init(struct socket *, struct mbuf *); |
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202 | int ip_rsvp_vif_done(struct socket *, struct mbuf *); |
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203 | void ip_rsvp_force_done(struct socket *); |
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204 | |
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205 | #ifdef IPDIVERT |
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206 | void div_init(void); |
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207 | void div_input(struct mbuf *, int); |
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208 | int div_usrreq(struct socket *, |
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209 | int, struct mbuf *, struct mbuf *, struct mbuf *); |
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210 | extern u_short ip_divert_port; |
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211 | extern u_short ip_divert_ignore; |
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212 | #endif /* IPDIVERT */ |
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213 | |
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214 | #endif /* _KERNEL */ |
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215 | |
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216 | #endif /* !_NETINET_IP_VAR_H_ */ |
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