1 | /* |
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2 | * Copyright (c) 1980, 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 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)route.h 8.3 (Berkeley) 4/19/94 |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NET_ROUTE_H_ |
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38 | #define _NET_ROUTE_H_ |
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39 | |
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40 | /* |
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41 | * Kernel resident routing tables. |
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42 | * |
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43 | * The routing tables are initialized when interface addresses |
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44 | * are set by making entries for all directly connected interfaces. |
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45 | */ |
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46 | |
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47 | /* |
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48 | * A route consists of a destination address and a reference |
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49 | * to a routing entry. These are often held by protocols |
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50 | * in their control blocks, e.g. inpcb. |
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51 | */ |
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52 | struct route { |
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53 | struct rtentry *ro_rt; |
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54 | struct sockaddr ro_dst; |
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55 | }; |
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56 | |
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57 | /* |
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58 | * These numbers are used by reliable protocols for determining |
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59 | * retransmission behavior and are included in the routing structure. |
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60 | */ |
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61 | struct rt_metrics { |
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62 | u_long rmx_locks; /* Kernel must leave these values alone */ |
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63 | u_long rmx_mtu; /* MTU for this path */ |
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64 | u_long rmx_hopcount; /* max hops expected */ |
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65 | u_long rmx_expire; /* lifetime for route, e.g. redirect */ |
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66 | u_long rmx_recvpipe; /* inbound delay-bandwidth product */ |
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67 | u_long rmx_sendpipe; /* outbound delay-bandwidth product */ |
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68 | u_long rmx_ssthresh; /* outbound gateway buffer limit */ |
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69 | u_long rmx_rtt; /* estimated round trip time */ |
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70 | u_long rmx_rttvar; /* estimated rtt variance */ |
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71 | u_long rmx_pksent; /* packets sent using this route */ |
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72 | u_long rmx_filler[4]; /* will be used for T/TCP later */ |
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73 | }; |
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74 | |
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75 | /* |
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76 | * rmx_rtt and rmx_rttvar are stored as microseconds; |
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77 | * RTTTOPRHZ(rtt) converts to a value suitable for use |
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78 | * by a protocol slowtimo counter. |
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79 | */ |
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80 | #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */ |
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81 | #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ)) |
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82 | |
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83 | /* |
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84 | * XXX kernel function pointer `rt_output' is visible to applications. |
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85 | */ |
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86 | struct mbuf; |
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87 | |
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88 | /* |
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89 | * We distinguish between routes to hosts and routes to networks, |
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90 | * preferring the former if available. For each route we infer |
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91 | * the interface to use from the gateway address supplied when |
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92 | * the route was entered. Routes that forward packets through |
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93 | * gateways are marked so that the output routines know to address the |
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94 | * gateway rather than the ultimate destination. |
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95 | */ |
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96 | #ifndef RNF_NORMAL |
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97 | #include <net/radix.h> |
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98 | #endif |
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99 | struct rtentry { |
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100 | struct radix_node rt_nodes[2]; /* tree glue, and other values */ |
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101 | #define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key)) |
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102 | #define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask)) |
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103 | struct sockaddr *rt_gateway; /* value */ |
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104 | short rt_filler; /* was short flags field */ |
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105 | short rt_refcnt; /* # held references */ |
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106 | u_long rt_flags; /* up/down?, host/net */ |
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107 | struct ifnet *rt_ifp; /* the answer: interface to use */ |
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108 | struct ifaddr *rt_ifa; /* the answer: interface to use */ |
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109 | struct sockaddr *rt_genmask; /* for generation of cloned routes */ |
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110 | caddr_t rt_llinfo; /* pointer to link level info cache */ |
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111 | struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */ |
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112 | struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */ |
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113 | int (*rt_output) __P((struct ifnet *, struct mbuf *, |
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114 | struct sockaddr *, struct rtentry *)); |
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115 | /* output routine for this (rt,if) */ |
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116 | struct rtentry *rt_parent; /* cloning parent of this route */ |
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117 | void *rt_filler2; /* more filler */ |
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118 | }; |
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119 | |
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120 | /* |
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121 | * Following structure necessary for 4.3 compatibility; |
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122 | * We should eventually move it to a compat file. |
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123 | */ |
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124 | struct ortentry { |
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125 | u_long rt_hash; /* to speed lookups */ |
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126 | struct sockaddr rt_dst; /* key */ |
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127 | struct sockaddr rt_gateway; /* value */ |
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128 | short rt_flags; /* up/down?, host/net */ |
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129 | short rt_refcnt; /* # held references */ |
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130 | u_long rt_use; /* raw # packets forwarded */ |
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131 | struct ifnet *rt_ifp; /* the answer: interface to use */ |
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132 | }; |
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133 | |
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134 | #define rt_use rt_rmx.rmx_pksent |
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135 | |
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136 | #define RTF_UP 0x1 /* route usable */ |
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137 | #define RTF_GATEWAY 0x2 /* destination is a gateway */ |
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138 | #define RTF_HOST 0x4 /* host entry (net otherwise) */ |
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139 | #define RTF_REJECT 0x8 /* host or net unreachable */ |
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140 | #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */ |
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141 | #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */ |
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142 | #define RTF_DONE 0x40 /* message confirmed */ |
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143 | /* 0x80 unused */ |
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144 | #define RTF_CLONING 0x100 /* generate new routes on use */ |
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145 | #define RTF_XRESOLVE 0x200 /* external daemon resolves name */ |
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146 | #define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */ |
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147 | #define RTF_STATIC 0x800 /* manually added */ |
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148 | #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */ |
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149 | #define RTF_PROTO2 0x4000 /* protocol specific routing flag */ |
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150 | #define RTF_PROTO1 0x8000 /* protocol specific routing flag */ |
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151 | |
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152 | #define RTF_PRCLONING 0x10000 /* protocol requires cloning */ |
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153 | #define RTF_WASCLONED 0x20000 /* route generated through cloning */ |
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154 | #define RTF_PROTO3 0x40000 /* protocol specific routing flag */ |
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155 | /* 0x80000 unused */ |
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156 | #define RTF_PINNED 0x100000 /* future use */ |
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157 | #define RTF_LOCAL 0x200000 /* route represents a local address */ |
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158 | #define RTF_BROADCAST 0x400000 /* route represents a bcast address */ |
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159 | #define RTF_MULTICAST 0x800000 /* route represents a mcast address */ |
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160 | /* 0x1000000 and up unassigned */ |
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161 | |
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162 | /* |
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163 | * Routing statistics. |
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164 | */ |
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165 | struct rtstat { |
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166 | short rts_badredirect; /* bogus redirect calls */ |
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167 | short rts_dynamic; /* routes created by redirects */ |
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168 | short rts_newgateway; /* routes modified by redirects */ |
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169 | short rts_unreach; /* lookups which failed */ |
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170 | short rts_wildcard; /* lookups satisfied by a wildcard */ |
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171 | }; |
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172 | /* |
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173 | * Structures for routing messages. |
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174 | */ |
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175 | struct rt_msghdr { |
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176 | u_short rtm_msglen; /* to skip over non-understood messages */ |
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177 | u_char rtm_version; /* future binary compatibility */ |
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178 | u_char rtm_type; /* message type */ |
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179 | u_short rtm_index; /* index for associated ifp */ |
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180 | int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ |
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181 | int rtm_addrs; /* bitmask identifying sockaddrs in msg */ |
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182 | pid_t rtm_pid; /* identify sender */ |
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183 | int rtm_seq; /* for sender to identify action */ |
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184 | int rtm_errno; /* why failed */ |
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185 | int rtm_use; /* from rtentry */ |
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186 | u_long rtm_inits; /* which metrics we are initializing */ |
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187 | struct rt_metrics rtm_rmx; /* metrics themselves */ |
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188 | }; |
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189 | |
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190 | #define RTM_VERSION 5 /* Up the ante and ignore older versions */ |
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191 | |
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192 | #define RTM_ADD 0x1 /* Add Route */ |
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193 | #define RTM_DELETE 0x2 /* Delete Route */ |
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194 | #define RTM_CHANGE 0x3 /* Change Metrics or flags */ |
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195 | #define RTM_GET 0x4 /* Report Metrics */ |
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196 | #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */ |
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197 | #define RTM_REDIRECT 0x6 /* Told to use different route */ |
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198 | #define RTM_MISS 0x7 /* Lookup failed on this address */ |
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199 | #define RTM_LOCK 0x8 /* fix specified metrics */ |
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200 | #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */ |
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201 | #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */ |
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202 | #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */ |
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203 | #define RTM_NEWADDR 0xc /* address being added to iface */ |
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204 | #define RTM_DELADDR 0xd /* address being removed from iface */ |
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205 | #define RTM_IFINFO 0xe /* iface going up/down etc. */ |
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206 | |
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207 | #define RTV_MTU 0x1 /* init or lock _mtu */ |
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208 | #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */ |
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209 | #define RTV_EXPIRE 0x4 /* init or lock _hopcount */ |
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210 | #define RTV_RPIPE 0x8 /* init or lock _recvpipe */ |
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211 | #define RTV_SPIPE 0x10 /* init or lock _sendpipe */ |
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212 | #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */ |
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213 | #define RTV_RTT 0x40 /* init or lock _rtt */ |
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214 | #define RTV_RTTVAR 0x80 /* init or lock _rttvar */ |
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215 | |
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216 | /* |
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217 | * Bitmask values for rtm_addr. |
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218 | */ |
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219 | #define RTA_DST 0x1 /* destination sockaddr present */ |
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220 | #define RTA_GATEWAY 0x2 /* gateway sockaddr present */ |
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221 | #define RTA_NETMASK 0x4 /* netmask sockaddr present */ |
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222 | #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */ |
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223 | #define RTA_IFP 0x10 /* interface name sockaddr present */ |
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224 | #define RTA_IFA 0x20 /* interface addr sockaddr present */ |
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225 | #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */ |
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226 | #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */ |
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227 | |
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228 | /* |
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229 | * Index offsets for sockaddr array for alternate internal encoding. |
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230 | */ |
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231 | #define RTAX_DST 0 /* destination sockaddr present */ |
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232 | #define RTAX_GATEWAY 1 /* gateway sockaddr present */ |
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233 | #define RTAX_NETMASK 2 /* netmask sockaddr present */ |
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234 | #define RTAX_GENMASK 3 /* cloning mask sockaddr present */ |
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235 | #define RTAX_IFP 4 /* interface name sockaddr present */ |
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236 | #define RTAX_IFA 5 /* interface addr sockaddr present */ |
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237 | #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */ |
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238 | #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */ |
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239 | #define RTAX_MAX 8 /* size of array to allocate */ |
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240 | |
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241 | struct rt_addrinfo { |
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242 | int rti_addrs; |
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243 | struct sockaddr *rti_info[RTAX_MAX]; |
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244 | }; |
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245 | |
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246 | struct route_cb { |
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247 | int ip_count; |
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248 | int ipx_count; |
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249 | int ns_count; |
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250 | int iso_count; |
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251 | int any_count; |
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252 | }; |
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253 | |
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254 | #ifdef KERNEL |
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255 | #define RTFREE(rt) \ |
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256 | if ((rt)->rt_refcnt <= 1) \ |
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257 | rtfree(rt); \ |
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258 | else \ |
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259 | (rt)->rt_refcnt--; |
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260 | |
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261 | extern struct route_cb route_cb; |
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262 | extern struct rtstat rtstat; |
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263 | extern struct radix_node_head *rt_tables[AF_MAX+1]; |
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264 | |
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265 | void route_init __P((void)); |
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266 | void rt_ifmsg __P((struct ifnet *)); |
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267 | void rt_missmsg __P((int, struct rt_addrinfo *, int, int)); |
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268 | void rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *)); |
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269 | int rt_setgate __P((struct rtentry *, |
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270 | struct sockaddr *, struct sockaddr *)); |
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271 | void rtalloc __P((struct route *)); |
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272 | void rtalloc_ign __P((struct route *, unsigned long)); |
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273 | struct rtentry * |
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274 | rtalloc1 __P((struct sockaddr *, int, unsigned long)); |
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275 | void rtfree __P((struct rtentry *)); |
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276 | int rtinit __P((struct ifaddr *, int, int)); |
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277 | int rtioctl __P((int, caddr_t, struct proc *)); |
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278 | void rtredirect __P((struct sockaddr *, struct sockaddr *, |
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279 | struct sockaddr *, int, struct sockaddr *, struct rtentry **)); |
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280 | int rtrequest __P((int, struct sockaddr *, |
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281 | struct sockaddr *, struct sockaddr *, int, struct rtentry **)); |
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282 | #endif |
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283 | |
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284 | #endif |
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