route.h revision 1.13
1 /* $NetBSD: route.h,v 1.13 1998/04/29 17:49:58 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)route.h 8.5 (Berkeley) 2/8/95 36 */ 37 38 #ifndef _NET_ROUTE_H_ 39 #define _NET_ROUTE_H_ 40 41 #include <sys/queue.h> 42 43 /* 44 * Kernel resident routing tables. 45 * 46 * The routing tables are initialized when interface addresses 47 * are set by making entries for all directly connected interfaces. 48 */ 49 50 /* 51 * A route consists of a destination address and a reference 52 * to a routing entry. These are often held by protocols 53 * in their control blocks, e.g. inpcb. 54 */ 55 struct route { 56 struct rtentry *ro_rt; 57 struct sockaddr ro_dst; 58 }; 59 60 /* 61 * These numbers are used by reliable protocols for determining 62 * retransmission behavior and are included in the routing structure. 63 */ 64 struct rt_metrics { 65 u_long rmx_locks; /* Kernel must leave these values alone */ 66 u_long rmx_mtu; /* MTU for this path */ 67 u_long rmx_hopcount; /* max hops expected */ 68 u_long rmx_expire; /* lifetime for route, e.g. redirect */ 69 u_long rmx_recvpipe; /* inbound delay-bandwith product */ 70 u_long rmx_sendpipe; /* outbound delay-bandwith product */ 71 u_long rmx_ssthresh; /* outbound gateway buffer limit */ 72 u_long rmx_rtt; /* estimated round trip time */ 73 u_long rmx_rttvar; /* estimated rtt variance */ 74 u_long rmx_pksent; /* packets sent using this route */ 75 }; 76 77 /* 78 * rmx_rtt and rmx_rttvar are stored as microseconds; 79 * RTTTOPRHZ(rtt) converts to a value suitable for use 80 * by a protocol slowtimo counter. 81 */ 82 #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */ 83 #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ)) 84 85 /* 86 * We distinguish between routes to hosts and routes to networks, 87 * preferring the former if available. For each route we infer 88 * the interface to use from the gateway address supplied when 89 * the route was entered. Routes that forward packets through 90 * gateways are marked so that the output routines know to address the 91 * gateway rather than the ultimate destination. 92 */ 93 #ifndef RNF_NORMAL 94 #include <net/radix.h> 95 #endif 96 struct rtentry { 97 struct radix_node rt_nodes[2]; /* tree glue, and other values */ 98 #define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key)) 99 #define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask)) 100 struct sockaddr *rt_gateway; /* value */ 101 short rt_flags; /* up/down?, host/net */ 102 short rt_refcnt; /* # held references */ 103 u_long rt_use; /* raw # packets forwarded */ 104 struct ifnet *rt_ifp; /* the answer: interface to use */ 105 struct ifaddr *rt_ifa; /* the answer: interface to use */ 106 struct sockaddr *rt_genmask; /* for generation of cloned routes */ 107 caddr_t rt_llinfo; /* pointer to link level info cache */ 108 struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */ 109 struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */ 110 LIST_HEAD(, rttimer) rt_timer; /* queue of timeouts for misc funcs */ 111 }; 112 113 /* 114 * Following structure necessary for 4.3 compatibility; 115 * We should eventually move it to a compat file. 116 */ 117 struct ortentry { 118 u_int32_t rt_hash; /* to speed lookups */ 119 struct sockaddr rt_dst; /* key */ 120 struct sockaddr rt_gateway; /* value */ 121 int16_t rt_flags; /* up/down?, host/net */ 122 int16_t rt_refcnt; /* # held references */ 123 u_int32_t rt_use; /* raw # packets forwarded */ 124 struct ifnet *rt_ifp; /* the answer: interface to use */ 125 }; 126 127 #define RTF_UP 0x1 /* route usable */ 128 #define RTF_GATEWAY 0x2 /* destination is a gateway */ 129 #define RTF_HOST 0x4 /* host entry (net otherwise) */ 130 #define RTF_REJECT 0x8 /* host or net unreachable */ 131 #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */ 132 #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */ 133 #define RTF_DONE 0x40 /* message confirmed */ 134 #define RTF_MASK 0x80 /* subnet mask present */ 135 #define RTF_CLONING 0x100 /* generate new routes on use */ 136 #define RTF_XRESOLVE 0x200 /* external daemon resolves name */ 137 #define RTF_LLINFO 0x400 /* generated by ARP or ESIS */ 138 #define RTF_STATIC 0x800 /* manually added */ 139 #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */ 140 #define RTF_PROTO2 0x4000 /* protocol specific routing flag */ 141 #define RTF_PROTO1 0x8000 /* protocol specific routing flag */ 142 143 144 /* 145 * Routing statistics. 146 */ 147 struct rtstat { 148 short rts_badredirect; /* bogus redirect calls */ 149 short rts_dynamic; /* routes created by redirects */ 150 short rts_newgateway; /* routes modified by redirects */ 151 short rts_unreach; /* lookups which failed */ 152 short rts_wildcard; /* lookups satisfied by a wildcard */ 153 }; 154 /* 155 * Structures for routing messages. 156 */ 157 struct rt_msghdr { 158 u_short rtm_msglen; /* to skip over non-understood messages */ 159 u_char rtm_version; /* future binary compatibility */ 160 u_char rtm_type; /* message type */ 161 u_short rtm_index; /* index for associated ifp */ 162 int rtm_flags; /* flags, incl. kern & message, e.g. DONE */ 163 int rtm_addrs; /* bitmask identifying sockaddrs in msg */ 164 pid_t rtm_pid; /* identify sender */ 165 int rtm_seq; /* for sender to identify action */ 166 int rtm_errno; /* why failed */ 167 int rtm_use; /* from rtentry */ 168 u_long rtm_inits; /* which metrics we are initializing */ 169 struct rt_metrics rtm_rmx; /* metrics themselves */ 170 }; 171 172 #define RTM_VERSION 3 /* Up the ante and ignore older versions */ 173 174 #define RTM_ADD 0x1 /* Add Route */ 175 #define RTM_DELETE 0x2 /* Delete Route */ 176 #define RTM_CHANGE 0x3 /* Change Metrics or flags */ 177 #define RTM_GET 0x4 /* Report Metrics */ 178 #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */ 179 #define RTM_REDIRECT 0x6 /* Told to use different route */ 180 #define RTM_MISS 0x7 /* Lookup failed on this address */ 181 #define RTM_LOCK 0x8 /* fix specified metrics */ 182 #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */ 183 #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */ 184 #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */ 185 #define RTM_NEWADDR 0xc /* address being added to iface */ 186 #define RTM_DELADDR 0xd /* address being removed from iface */ 187 #define RTM_IFINFO 0xe /* iface going up/down etc. */ 188 189 #define RTV_MTU 0x1 /* init or lock _mtu */ 190 #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */ 191 #define RTV_EXPIRE 0x4 /* init or lock _hopcount */ 192 #define RTV_RPIPE 0x8 /* init or lock _recvpipe */ 193 #define RTV_SPIPE 0x10 /* init or lock _sendpipe */ 194 #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */ 195 #define RTV_RTT 0x40 /* init or lock _rtt */ 196 #define RTV_RTTVAR 0x80 /* init or lock _rttvar */ 197 198 /* 199 * Bitmask values for rtm_addr. 200 */ 201 #define RTA_DST 0x1 /* destination sockaddr present */ 202 #define RTA_GATEWAY 0x2 /* gateway sockaddr present */ 203 #define RTA_NETMASK 0x4 /* netmask sockaddr present */ 204 #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */ 205 #define RTA_IFP 0x10 /* interface name sockaddr present */ 206 #define RTA_IFA 0x20 /* interface addr sockaddr present */ 207 #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */ 208 #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */ 209 210 /* 211 * Index offsets for sockaddr array for alternate internal encoding. 212 */ 213 #define RTAX_DST 0 /* destination sockaddr present */ 214 #define RTAX_GATEWAY 1 /* gateway sockaddr present */ 215 #define RTAX_NETMASK 2 /* netmask sockaddr present */ 216 #define RTAX_GENMASK 3 /* cloning mask sockaddr present */ 217 #define RTAX_IFP 4 /* interface name sockaddr present */ 218 #define RTAX_IFA 5 /* interface addr sockaddr present */ 219 #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */ 220 #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */ 221 #define RTAX_MAX 8 /* size of array to allocate */ 222 223 struct rt_addrinfo { 224 int rti_addrs; 225 struct sockaddr *rti_info[RTAX_MAX]; 226 }; 227 228 struct route_cb { 229 int ip_count; 230 int ns_count; 231 int iso_count; 232 int any_count; 233 }; 234 235 /* 236 * This structure, and the prototypes for the rt_timer_{init,remove_all, 237 * add,timer} functions all used with the kind permission of BSDI. 238 * These allow functions to be called for routes at specific times. 239 */ 240 241 struct rttimer { 242 CIRCLEQ_ENTRY(rttimer) rtt_next; 243 LIST_ENTRY(rttimer) rtt_link; /* Multiple timers on single route */ 244 struct rttimer_queue *rtt_queue; 245 struct rtentry *rtt_rt; /* Back pointer to the route */ 246 void (*rtt_func) __P((struct rtentry *, 247 struct rttimer *)); 248 time_t rtt_time; /* When this timer was registered */ 249 }; 250 251 struct rttimer_queue { 252 long rtq_timeout; 253 CIRCLEQ_HEAD(, rttimer) rtq_head; 254 LIST_ENTRY(rttimer_queue) rtq_link; 255 }; 256 257 258 #ifdef _KERNEL 259 #define RTFREE(rt) \ 260 if ((rt)->rt_refcnt <= 1) \ 261 rtfree(rt); \ 262 else \ 263 (rt)->rt_refcnt--; 264 265 struct route_cb route_cb; 266 struct rtstat rtstat; 267 struct radix_node_head *rt_tables[AF_MAX+1]; 268 269 struct socket; 270 271 void route_init __P((void)); 272 int route_output __P((struct mbuf *, ...)); 273 int route_usrreq __P((struct socket *, 274 int, struct mbuf *, struct mbuf *, struct mbuf *, struct proc *)); 275 void rt_ifmsg __P((struct ifnet *)); 276 void rt_maskedcopy __P((struct sockaddr *, 277 struct sockaddr *, struct sockaddr *)); 278 void rt_missmsg __P((int, struct rt_addrinfo *, int, int)); 279 void rt_newaddrmsg __P((int, struct ifaddr *, int, struct rtentry *)); 280 int rt_setgate __P((struct rtentry *, 281 struct sockaddr *, struct sockaddr *)); 282 void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *)); 283 int rt_timer_add __P((struct rtentry *, 284 void(*)(struct rtentry *, struct rttimer *), 285 struct rttimer_queue *)); 286 void rt_timer_init __P((void)); 287 struct rttimer_queue * 288 rt_timer_queue_create __P((u_int)); 289 void rt_timer_queue_change __P((struct rttimer_queue *, long)); 290 void rt_timer_queue_destroy __P((struct rttimer_queue *, int)); 291 void rt_timer_remove_all __P((struct rtentry *)); 292 void rt_timer_timer __P((void *)); 293 void rtable_init __P((void **)); 294 void rtalloc __P((struct route *)); 295 struct rtentry * 296 rtalloc1 __P((struct sockaddr *, int)); 297 void rtfree __P((struct rtentry *)); 298 int rtinit __P((struct ifaddr *, int, int)); 299 int rtioctl __P((u_long, caddr_t, struct proc *)); 300 void rtredirect __P((struct sockaddr *, struct sockaddr *, 301 struct sockaddr *, int, struct sockaddr *, struct rtentry **)); 302 int rtrequest __P((int, struct sockaddr *, 303 struct sockaddr *, struct sockaddr *, int, struct rtentry **)); 304 #endif /* _KERNEL */ 305 #endif /* _NET_ROUTE_H_ */ 306
Indexes created Sun Sep 21 19:09:51 GMT 2025