| 1 | /* Modified for emx by hv and em 1994,1996
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| 2 | * Modified for gcc/os2 by bird 2003
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| 3 | *
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| 4 | * Copyright (c) 1980, 1986 Regents of the University of California.
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| 5 | * All rights reserved.
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| 6 | *
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| 7 | * Redistribution and use in source and binary forms, with or without
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| 8 | * modification, are permitted provided that the following conditions
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| 9 | * are met:
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| 10 | * 1. Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * 2. Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * 3. All advertising materials mentioning features or use of this software
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| 16 | * must display the following acknowledgement:
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| 17 | * This product includes software developed by the University of
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| 18 | * California, Berkeley and its contributors.
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| 19 | * 4. Neither the name of the University nor the names of its contributors
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| 20 | * may be used to endorse or promote products derived from this software
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| 21 | * without specific prior written permission.
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| 22 | *
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| 23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 33 | * SUCH DAMAGE.
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| 34 | *
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| 35 | * from: @(#)route.h 7.13 (Berkeley) 4/25/91
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| 36 | * $Id: route.h,v 1.3 1993/05/20 03:06:10 cgd Exp $
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| 37 | */
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| 38 |
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| 39 | #ifndef _NET_ROUTE_H_
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| 40 | #define _NET_ROUTE_H_
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| 41 |
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| 42 | #include <net/if.h>
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| 43 |
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| 44 | #if defined (__cplusplus)
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| 45 | extern "C" {
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| 46 | #endif
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| 47 |
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| 48 | /*
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| 49 | * Kernel resident routing tables.
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| 50 | *
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| 51 | * The routing tables are initialized when interface addresses
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| 52 | * are set by making entries for all directly connected interfaces.
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| 53 | */
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| 54 |
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| 55 | /*
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| 56 | * A route consists of a destination address and a reference
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| 57 | * to a routing entry. These are often held by protocols
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| 58 | * in their control blocks, e.g. inpcb.
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| 59 | */
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| 60 | struct route {
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| 61 | struct rtentry *ro_rt;
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| 62 | struct sockaddr ro_dst;
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| 63 | };
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| 64 |
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| 65 |
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| 66 | #ifndef TCPV40HDRS
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| 67 | /*
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| 68 | * These numbers are used by reliable protocols for determining
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| 69 | * retransmission behavior and are included in the routing structure.
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| 70 | */
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| 71 | struct rt_metrics {
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| 72 | u_long rmx_locks; /* Kernel must leave these values alone */
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| 73 | u_long rmx_mtu; /* MTU for this path */
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| 74 | u_long rmx_hopcount; /* max hops expected */
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| 75 | u_long rmx_expire; /* lifetime for route, e.g. redirect */
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| 76 | u_long rmx_recvpipe; /* inbound delay-bandwith product */
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| 77 | u_long rmx_sendpipe; /* outbound delay-bandwith product */
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| 78 | u_long rmx_ssthresh; /* outbound gateway buffer limit */
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| 79 | u_long rmx_rtt; /* estimated round trip time */
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| 80 | u_long rmx_rttvar; /* estimated rtt variance */
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| 81 | u_long rmx_pksent; /* packets sent using this route */
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| 82 | u_long rmx_filler[4]; /* will be used for T/TCP later */
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| 83 | };
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| 84 |
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| 85 | /*
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| 86 | * rmx_rtt and rmx_rttvar are stored as microseconds;
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| 87 | * RTTTOPRHZ(rtt) converts to a value suitable for use
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| 88 | * by a protocol slowtimo counter.
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| 89 | */
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| 90 | #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
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| 91 | #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
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| 92 | #endif /* !TCPV40HDRS */
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| 93 |
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| 94 |
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| 95 | /*
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| 96 | * We distinguish between routes to hosts and routes to networks,
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| 97 | * preferring the former if available. For each route we infer
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| 98 | * the interface to use from the gateway address supplied when
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| 99 | * the route was entered. Routes that forward packets through
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| 100 | * gateways are marked so that the output routines know to address the
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| 101 | * gateway rather than the ultimate destination.
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| 102 | *
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| 103 | * Following structure necessary for 4.3 compatibility;
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| 104 | */
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| 105 | #pragma pack(1)
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| 106 | #ifdef TCPV40HDRS
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| 107 | struct rtentry
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| 108 | #else
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| 109 | struct ortentry
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| 110 | #endif
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| 111 | {
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| 112 | u_long rt_hash; /* to speed lookups */
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| 113 | struct sockaddr rt_dst; /* key */
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| 114 | struct sockaddr rt_gateway; /* value */
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| 115 | short rt_flags; /* up/down?, host/net */
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| 116 | short rt_refcnt; /* # held references */
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| 117 | u_long rt_use; /* raw # packets forwarded */
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| 118 | struct ifnet *rt_ifp; /* the answer: interface to use */
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| 119 | long metric1,metric2,metric3,metric4; /*IBM special */
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| 120 | };
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| 121 | #pragma pack()
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| 122 |
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| 123 | /* IBM: hv: I think this is the internal structure of the RT table of the
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| 124 | * router daemon. Don't think it belongs here, but the toolkit has it as well
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| 125 | */
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| 126 | #define RTENTRY_COUNT 512
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| 127 | #pragma pack(1)
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| 128 | struct rtentries {
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| 129 | short hostcount;
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| 130 | short netcount;
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| 131 | #ifdef TCPV40HDRS
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| 132 | struct rtentry rttable[RTENTRY_COUNT];
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| 133 | #else
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| 134 | struct ortentry rttable[RTENTRY_COUNT];
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| 135 | #endif
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| 136 | };
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| 137 | #pragma pack()
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| 138 |
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| 139 |
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| 140 | #define RTF_UP 0x1 /* route usable */
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| 141 | #define RTF_GATEWAY 0x2 /* destination is a gateway */
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| 142 | #define RTF_HOST 0x4 /* host entry (net otherwise) */
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| 143 | #define RTF_REJECT 0x8 /* host or net unreachable */
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| 144 | #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
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| 145 | #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
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| 146 | #define RTF_DONE 0x40 /* message confirmed */
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| 147 | #define RTF_MASK 0x80 /* subnet mask present */
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| 148 | #define RTF_CLONING 0x100 /* generate new routes on use */
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| 149 | #define RTF_XRESOLVE 0x200 /* external daemon resolves name */
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| 150 | #define RTF_LLINFO 0x400 /* generated by ARP or ESIS */
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| 151 | #define RTF_STATIC 0x800 /* route manually added */
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| 152 | #define RTF_BLACKHOLE 0x1000 /* discard packets during updates */
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| 153 | #ifndef TCPV40HDRS
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| 154 | #define RTF_LLTEMP 0x2000 /* manually added temporary arp entry */
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| 155 | #endif
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| 156 | #define RTF_PROTO2 0x4000 /* protocol specific routing flag */
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| 157 | #define RTF_PROTO1 0x8000 /* protocol specific routing flag */
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| 158 | #ifndef TCPV40HDRS
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| 159 | #define RTF_PRCLONING 0x10000 /* protocol requires cloning */
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| 160 | #define RTF_WASCLONED 0x20000 /* route generated through cloning */
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| 161 | #define RTF_PROTO3 0x40000 /* protocol specific routing flag */
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| 162 | #define RTF_CHAINDELETE 0x80000 /* chain is being deleted (internal) */
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| 163 | #define RTF_PINNED 0x100000 /* future use */
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| 164 | #define RTF_TUNNEL 0x200000 /* tunnelling bit */
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| 165 | #define RTF_CRYPT 0x400000 /* encrypting tunnel */
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| 166 | #define RTF_AUTH 0x800000 /* authenticating tunnel */
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| 167 | #endif
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| 168 |
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| 169 |
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| 170 | /*
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| 171 | * Routing statistics.
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| 172 | */
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| 173 | struct rtstat {
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| 174 | short rts_badredirect; /* bogus redirect calls */
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| 175 | short rts_dynamic; /* routes created by redirects */
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| 176 | short rts_newgateway; /* routes modified by redirects */
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| 177 | short rts_unreach; /* lookups which failed */
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| 178 | short rts_wildcard; /* lookups satisfied by a wildcard */
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| 179 | };
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| 180 | #ifndef TCPV40HDRS
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| 181 | /*
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| 182 | * Structures for routing messages.
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| 183 | */
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| 184 | #pragma pack(1)
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| 185 | struct rt_msghdr {
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| 186 | #define IFNAMSIZ 16
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| 187 | u_short rtm_msglen; /* to skip over non-understood messages */
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| 188 | u_char rtm_version; /* future binary compatibility */
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| 189 | u_char rtm_type; /* message type */
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| 190 | u_short rtm_index; /* index for associated ifp */
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| 191 | short rtm_unit; /* new field for subnet routing */
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| 192 | int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
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| 193 | int rtm_addrs; /* bitmask identifying sockaddrs in msg */
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| 194 | pid_t rtm_pid; /* identify sender */
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| 195 | int rtm_seq; /* for sender to identify action */
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| 196 | int rtm_errno; /* why failed */
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| 197 | int rtm_use; /* from rtentry */
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| 198 | u_long rtm_inits; /* which metrics we are initializing */
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| 199 | u_long rtm_netmask; /* new field for subnet routing */
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| 200 | char rtm_name[IFNAMSIZ]; /* new field for subnet routing */
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| 201 | struct rt_metrics rtm_rmx; /* metrics themselves */
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| 202 | };
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| 203 | #pragma pack()
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| 204 |
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| 205 | #define RTM_VERSION 4 /* Up the ante and ignore older versions */
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| 206 |
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| 207 | #define RTM_ADD 0x1 /* Add Route */
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| 208 | #define RTM_DELETE 0x2 /* Delete Route */
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| 209 | #define RTM_CHANGE 0x3 /* Change Metrics or flags */
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| 210 | #define RTM_GET 0x4 /* Report Metrics */
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| 211 | #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
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| 212 | #define RTM_REDIRECT 0x6 /* Told to use different route */
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| 213 | #define RTM_MISS 0x7 /* Lookup failed on this address */
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| 214 | #define RTM_LOCK 0x8 /* fix specified metrics */
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| 215 | #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
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| 216 | #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
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| 217 | #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
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| 218 | #define RTM_NEWADDR 0xc /* address being added to iface */
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| 219 | #define RTM_DELADDR 0xd /* address being removed from iface */
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| 220 | #define RTM_IFINFO 0xe /* iface going up/down etc. */
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| 221 |
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| 222 | #define RTV_MTU 0x1 /* init or lock _mtu */
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| 223 | #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
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| 224 | #define RTV_EXPIRE 0x4 /* init or lock _hopcount */
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| 225 | #define RTV_RPIPE 0x8 /* init or lock _recvpipe */
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| 226 | #define RTV_SPIPE 0x10 /* init or lock _sendpipe */
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| 227 | #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
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| 228 | #define RTV_RTT 0x40 /* init or lock _rtt */
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| 229 | #define RTV_RTTVAR 0x80 /* init or lock _rttvar */
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| 230 |
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| 231 | /*
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| 232 | * Bitmask values for rtm_addr.
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| 233 | */
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| 234 | #define RTA_DST 0x1 /* destination sockaddr present */
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| 235 | #define RTA_GATEWAY 0x2 /* gateway sockaddr present */
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| 236 | #define RTA_NETMASK 0x4 /* netmask sockaddr present */
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| 237 | #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
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| 238 | #define RTA_IFP 0x10 /* interface name sockaddr present */
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| 239 | #define RTA_IFA 0x20 /* interface addr sockaddr present */
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| 240 | #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
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| 241 | #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
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| 242 |
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| 243 | /*
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| 244 | * Index offsets for sockaddr array for alternate internal encoding.
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| 245 | */
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| 246 | #define RTAX_DST 0 /* destination sockaddr present */
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| 247 | #define RTAX_GATEWAY 1 /* gateway sockaddr present */
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| 248 | #define RTAX_NETMASK 2 /* netmask sockaddr present */
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| 249 | #define RTAX_GENMASK 3 /* cloning mask sockaddr present */
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| 250 | #define RTAX_IFP 4 /* interface name sockaddr present */
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| 251 | #define RTAX_IFA 5 /* interface addr sockaddr present */
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| 252 | #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
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| 253 | #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
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| 254 | #define RTAX_MAX 8 /* size of array to allocate */
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| 255 |
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| 256 | struct rt_addrinfo {
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| 257 | int rti_addrs;
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| 258 | struct sockaddr *rti_info[RTAX_MAX];
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| 259 | };
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| 260 |
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| 261 | struct route_cb {
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| 262 | int ip_count;
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| 263 | int ns_count;
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| 264 | int iso_count;
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| 265 | int any_count;
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| 266 | };
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| 267 | #endif /* !TCPV40HDRS */
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| 268 |
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| 269 | #if defined (__cplusplus)
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| 270 | }
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| 271 | #endif
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| 272 |
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| 273 | #endif /* !_NET_ROUTE_H_ */
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