[39e6e65a] | 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 | * 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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[dac1edb] | 29 | * @(#)route.h 8.4 (Berkeley) 1/9/95 |
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[e791c230] | 30 | * $FreeBSD: src/sys/net/route.h,v 1.65 2006/03/15 19:39:09 andre Exp $ |
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[dac1edb] | 31 | */ |
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| 32 | |
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| 33 | /* |
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[39e6e65a] | 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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[dac1edb] | 61 | struct rt_metrics_lite { |
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| 62 | u_long rmx_mtu; /* MTU for this path */ |
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| 63 | u_long rmx_expire; /* lifetime for route, e.g. redirect */ |
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| 64 | u_long rmx_pksent; /* packets sent using this route */ |
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| 65 | }; |
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| 66 | |
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[39e6e65a] | 67 | struct rt_metrics { |
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| 68 | u_long rmx_locks; /* Kernel must leave these values alone */ |
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| 69 | u_long rmx_mtu; /* MTU for this path */ |
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| 70 | u_long rmx_hopcount; /* max hops expected */ |
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| 71 | u_long rmx_expire; /* lifetime for route, e.g. redirect */ |
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| 72 | u_long rmx_recvpipe; /* inbound delay-bandwidth product */ |
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| 73 | u_long rmx_sendpipe; /* outbound delay-bandwidth product */ |
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| 74 | u_long rmx_ssthresh; /* outbound gateway buffer limit */ |
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| 75 | u_long rmx_rtt; /* estimated round trip time */ |
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| 76 | u_long rmx_rttvar; /* estimated rtt variance */ |
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| 77 | u_long rmx_pksent; /* packets sent using this route */ |
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| 78 | u_long rmx_filler[4]; /* will be used for T/TCP later */ |
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| 79 | }; |
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| 80 | |
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| 81 | /* |
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| 82 | * rmx_rtt and rmx_rttvar are stored as microseconds; |
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| 83 | * RTTTOPRHZ(rtt) converts to a value suitable for use |
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| 84 | * by a protocol slowtimo counter. |
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| 85 | */ |
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| 86 | #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */ |
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| 87 | #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ)) |
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| 88 | |
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| 89 | /* |
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| 90 | * XXX kernel function pointer `rt_output' is visible to applications. |
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| 91 | */ |
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| 92 | struct mbuf; |
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| 93 | |
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| 94 | /* |
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| 95 | * We distinguish between routes to hosts and routes to networks, |
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| 96 | * preferring the former if available. For each route we infer |
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| 97 | * the interface to use from the gateway address supplied when |
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| 98 | * the route was entered. Routes that forward packets through |
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| 99 | * gateways are marked so that the output routines know to address the |
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| 100 | * gateway rather than the ultimate destination. |
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| 101 | */ |
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| 102 | #ifndef RNF_NORMAL |
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| 103 | #include <net/radix.h> |
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| 104 | #endif |
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| 105 | struct rtentry { |
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| 106 | struct radix_node rt_nodes[2]; /* tree glue, and other values */ |
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| 107 | #define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key)) |
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| 108 | #define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask)) |
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| 109 | struct sockaddr *rt_gateway; /* value */ |
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| 110 | u_long rt_flags; /* up/down?, host/net */ |
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| 111 | struct ifnet *rt_ifp; /* the answer: interface to use */ |
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[395a6f6d] | 112 | struct ifaddr *rt_ifa; /* the answer: interface address to use */ |
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| 113 | struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */ |
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| 114 | long rt_refcnt; /* # held references */ |
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[39e6e65a] | 115 | struct sockaddr *rt_genmask; /* for generation of cloned routes */ |
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| 116 | caddr_t rt_llinfo; /* pointer to link level info cache */ |
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| 117 | struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */ |
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| 118 | struct rtentry *rt_parent; /* cloning parent of this route */ |
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| 119 | }; |
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| 120 | |
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| 121 | /* |
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| 122 | * Following structure necessary for 4.3 compatibility; |
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| 123 | * We should eventually move it to a compat file. |
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| 124 | */ |
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| 125 | struct ortentry { |
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| 126 | u_long rt_hash; /* to speed lookups */ |
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| 127 | struct sockaddr rt_dst; /* key */ |
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| 128 | struct sockaddr rt_gateway; /* value */ |
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| 129 | short rt_flags; /* up/down?, host/net */ |
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| 130 | short rt_refcnt; /* # held references */ |
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| 131 | u_long rt_use; /* raw # packets forwarded */ |
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| 132 | struct ifnet *rt_ifp; /* the answer: interface to use */ |
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| 133 | }; |
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| 134 | |
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| 135 | #define rt_use rt_rmx.rmx_pksent |
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| 136 | |
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| 137 | #define RTF_UP 0x1 /* route usable */ |
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| 138 | #define RTF_GATEWAY 0x2 /* destination is a gateway */ |
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| 139 | #define RTF_HOST 0x4 /* host entry (net otherwise) */ |
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| 140 | #define RTF_REJECT 0x8 /* host or net unreachable */ |
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| 141 | #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */ |
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| 142 | #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */ |
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| 143 | #define RTF_DONE 0x40 /* message confirmed */ |
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[dac1edb] | 144 | /* 0x80 unused, was RTF_DELCLONE */ |
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[39e6e65a] | 145 | #define RTF_CLONING 0x100 /* generate new routes on use */ |
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| 146 | #define RTF_XRESOLVE 0x200 /* external daemon resolves name */ |
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| 147 | #define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */ |
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| 148 | #define RTF_STATIC 0x800 /* manually added */ |
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| 149 | #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */ |
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| 150 | #define RTF_PROTO2 0x4000 /* protocol specific routing flag */ |
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| 151 | #define RTF_PROTO1 0x8000 /* protocol specific routing flag */ |
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| 152 | |
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| 153 | #define RTF_PRCLONING 0x10000 /* protocol requires cloning */ |
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| 154 | #define RTF_WASCLONED 0x20000 /* route generated through cloning */ |
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| 155 | #define RTF_PROTO3 0x40000 /* protocol specific routing flag */ |
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| 156 | /* 0x80000 unused */ |
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| 157 | #define RTF_PINNED 0x100000 /* future use */ |
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| 158 | #define RTF_LOCAL 0x200000 /* route represents a local address */ |
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| 159 | #define RTF_BROADCAST 0x400000 /* route represents a bcast address */ |
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| 160 | #define RTF_MULTICAST 0x800000 /* route represents a mcast address */ |
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| 161 | /* 0x1000000 and up unassigned */ |
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| 162 | |
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| 163 | /* |
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| 164 | * Routing statistics. |
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| 165 | */ |
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| 166 | struct rtstat { |
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| 167 | short rts_badredirect; /* bogus redirect calls */ |
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| 168 | short rts_dynamic; /* routes created by redirects */ |
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| 169 | short rts_newgateway; /* routes modified by redirects */ |
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| 170 | short rts_unreach; /* lookups which failed */ |
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| 171 | short rts_wildcard; /* lookups satisfied by a wildcard */ |
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| 172 | }; |
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| 173 | /* |
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| 174 | * Structures for routing messages. |
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| 175 | */ |
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| 176 | struct rt_msghdr { |
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| 177 | u_short rtm_msglen; /* to skip over non-understood messages */ |
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| 178 | u_char rtm_version; /* future binary compatibility */ |
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| 179 | u_char rtm_type; /* message type */ |
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| 180 | u_short rtm_index; /* index for associated ifp */ |
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| 181 | int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ |
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| 182 | int rtm_addrs; /* bitmask identifying sockaddrs in msg */ |
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| 183 | pid_t rtm_pid; /* identify sender */ |
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| 184 | int rtm_seq; /* for sender to identify action */ |
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| 185 | int rtm_errno; /* why failed */ |
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| 186 | int rtm_use; /* from rtentry */ |
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| 187 | u_long rtm_inits; /* which metrics we are initializing */ |
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| 188 | struct rt_metrics rtm_rmx; /* metrics themselves */ |
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| 189 | }; |
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| 190 | |
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| 191 | #define RTM_VERSION 5 /* Up the ante and ignore older versions */ |
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| 192 | |
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[dac1edb] | 193 | /* |
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| 194 | * Message types. |
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| 195 | */ |
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[39e6e65a] | 196 | #define RTM_ADD 0x1 /* Add Route */ |
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| 197 | #define RTM_DELETE 0x2 /* Delete Route */ |
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| 198 | #define RTM_CHANGE 0x3 /* Change Metrics or flags */ |
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| 199 | #define RTM_GET 0x4 /* Report Metrics */ |
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| 200 | #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */ |
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| 201 | #define RTM_REDIRECT 0x6 /* Told to use different route */ |
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| 202 | #define RTM_MISS 0x7 /* Lookup failed on this address */ |
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| 203 | #define RTM_LOCK 0x8 /* fix specified metrics */ |
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| 204 | #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */ |
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| 205 | #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */ |
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| 206 | #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */ |
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| 207 | #define RTM_NEWADDR 0xc /* address being added to iface */ |
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| 208 | #define RTM_DELADDR 0xd /* address being removed from iface */ |
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| 209 | #define RTM_IFINFO 0xe /* iface going up/down etc. */ |
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[dac1edb] | 210 | #define RTM_NEWMADDR 0xf /* mcast group membership being added to if */ |
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| 211 | #define RTM_DELMADDR 0x10 /* mcast group membership being deleted */ |
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| 212 | #define RTM_IFANNOUNCE 0x11 /* iface arrival/departure */ |
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| 213 | #define RTM_IEEE80211 0x12 /* IEEE80211 wireless event */ |
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[39e6e65a] | 214 | |
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[dac1edb] | 215 | /* |
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| 216 | * Bitmask values for rtm_inits and rmx_locks. |
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| 217 | */ |
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[39e6e65a] | 218 | #define RTV_MTU 0x1 /* init or lock _mtu */ |
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| 219 | #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */ |
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[dac1edb] | 220 | #define RTV_EXPIRE 0x4 /* init or lock _expire */ |
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[39e6e65a] | 221 | #define RTV_RPIPE 0x8 /* init or lock _recvpipe */ |
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| 222 | #define RTV_SPIPE 0x10 /* init or lock _sendpipe */ |
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| 223 | #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */ |
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| 224 | #define RTV_RTT 0x40 /* init or lock _rtt */ |
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| 225 | #define RTV_RTTVAR 0x80 /* init or lock _rttvar */ |
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| 226 | |
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| 227 | /* |
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[dac1edb] | 228 | * Bitmask values for rtm_addrs. |
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[39e6e65a] | 229 | */ |
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| 230 | #define RTA_DST 0x1 /* destination sockaddr present */ |
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| 231 | #define RTA_GATEWAY 0x2 /* gateway sockaddr present */ |
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| 232 | #define RTA_NETMASK 0x4 /* netmask sockaddr present */ |
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| 233 | #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */ |
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| 234 | #define RTA_IFP 0x10 /* interface name sockaddr present */ |
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| 235 | #define RTA_IFA 0x20 /* interface addr sockaddr present */ |
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| 236 | #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */ |
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| 237 | #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */ |
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| 238 | |
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| 239 | /* |
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| 240 | * Index offsets for sockaddr array for alternate internal encoding. |
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| 241 | */ |
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| 242 | #define RTAX_DST 0 /* destination sockaddr present */ |
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| 243 | #define RTAX_GATEWAY 1 /* gateway sockaddr present */ |
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| 244 | #define RTAX_NETMASK 2 /* netmask sockaddr present */ |
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| 245 | #define RTAX_GENMASK 3 /* cloning mask sockaddr present */ |
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| 246 | #define RTAX_IFP 4 /* interface name sockaddr present */ |
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| 247 | #define RTAX_IFA 5 /* interface addr sockaddr present */ |
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| 248 | #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */ |
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| 249 | #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */ |
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| 250 | #define RTAX_MAX 8 /* size of array to allocate */ |
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| 251 | |
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| 252 | struct rt_addrinfo { |
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| 253 | int rti_addrs; |
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| 254 | struct sockaddr *rti_info[RTAX_MAX]; |
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| 255 | }; |
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| 256 | |
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| 257 | struct route_cb { |
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| 258 | int ip_count; |
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| 259 | int ipx_count; |
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| 260 | int ns_count; |
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| 261 | int iso_count; |
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| 262 | int any_count; |
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| 263 | }; |
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| 264 | |
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[dc28f16] | 265 | #ifdef _KERNEL |
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[39e6e65a] | 266 | #define RTFREE(rt) \ |
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[60a2d689] | 267 | do { \ |
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| 268 | if ((rt)->rt_refcnt <= 1) \ |
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[39e6e65a] | 269 | rtfree(rt); \ |
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[60a2d689] | 270 | else \ |
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| 271 | (rt)->rt_refcnt--; \ |
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| 272 | } while (0) |
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[39e6e65a] | 273 | |
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| 274 | extern struct route_cb route_cb; |
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| 275 | extern struct radix_node_head *rt_tables[AF_MAX+1]; |
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| 276 | |
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[e791c230] | 277 | void route_init(void); |
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[395a6f6d] | 278 | void rt_ifmsg(struct ifnet *); |
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| 279 | void rt_missmsg(int, struct rt_addrinfo *, int, int); |
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| 280 | void rt_newaddrmsg(int, struct ifaddr *, int, struct rtentry *); |
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| 281 | int rt_setgate(struct rtentry *, struct sockaddr *, struct sockaddr *); |
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[e791c230] | 282 | void rtalloc_ign(struct route *, unsigned long); |
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[395a6f6d] | 283 | void rtalloc(struct route *ro); /* XXX deprecated, use rtalloc_ign(ro, 0) */ |
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[39e6e65a] | 284 | struct rtentry * |
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[e791c230] | 285 | rtalloc1(struct sockaddr *, int, unsigned long); |
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[395a6f6d] | 286 | void rtfree(struct rtentry *); |
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| 287 | int rtinit(struct ifaddr *, int, int); |
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[e791c230] | 288 | int rtioctl(int, caddr_t, struct proc *); |
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[395a6f6d] | 289 | void rtredirect(struct sockaddr *, struct sockaddr *, |
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| 290 | struct sockaddr *, int, struct sockaddr *, struct rtentry **); |
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| 291 | int rtrequest(int, struct sockaddr *, |
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| 292 | struct sockaddr *, struct sockaddr *, int, struct rtentry **); |
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[39e6e65a] | 293 | #endif |
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| 294 | |
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| 295 | #endif |
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