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65 * @(#)route.h 8.4 (Berkeley) 1/9/95
66 * $FreeBSD: src/sys/net/route.h,v 1.36.2.5 2002/02/01 11:48:01 ru Exp $
67 * $DragonFly: src/sys/net/route.h,v 1.24 2008/09/11 11:23:29 sephe Exp $
74 #include <sys/types.h>
77 #include <sys/param.h>
79 #ifndef _SYS_SOCKET_H_
80 #include <sys/socket.h>
84 * Kernel resident routing tables.
86 * The routing tables are initialized when interface addresses
87 * are set by making entries for all directly connected interfaces.
91 * A route consists of a destination address and a reference
92 * to a routing entry. These are often held by protocols
93 * in their control blocks, e.g. inpcb.
96 struct rtentry *ro_rt;
97 struct sockaddr ro_dst;
101 * These numbers are used by reliable protocols for determining
102 * retransmission behavior and are included in the routing structure.
104 struct rt_metrics { /* grouped for locality of reference */
105 u_long rmx_locks; /* Kernel must leave these values alone */
106 u_long rmx_mtu; /* MTU for this path */
107 u_long rmx_pksent; /* packets sent using this route */
108 u_long rmx_expire; /* lifetime for route */
110 u_long rmx_sendpipe; /* outbound delay-bandwidth product */
111 u_long rmx_ssthresh; /* outbound gateway buffer limit */
112 u_long rmx_rtt; /* estimated round trip time */
113 u_long rmx_rttvar; /* estimated rtt variance */
115 u_long rmx_recvpipe; /* inbound delay-bandwidth product */
116 u_long rmx_hopcount; /* max hops expected */
117 u_short rmx_mssopt; /* peer's cached MSS */
118 u_short rmx_pad; /* explicit pad */
119 u_long rmx_msl; /* maximum segment lifetime */
120 u_long rmx_filler[2]; /* for future expansion */
124 * rmx_rtt and rmx_rttvar are stored as microseconds;
125 * RTTTOPRHZ(rtt) converts to a value suitable for use
126 * by a protocol slowtimo counter.
128 #define RTM_RTTUNIT 1000000 /* units for rtt, rttvar, as units per sec */
129 #define RTTTOPRHZ(r) ((r) / (RTM_RTTUNIT / PR_SLOWHZ))
132 * XXX kernel function pointer `rt_output' is visible to applications.
137 * We distinguish between routes to hosts and routes to networks,
138 * preferring the former if available. For each route we infer
139 * the interface to use from the gateway address supplied when
140 * the route was entered. Routes that forward packets through
141 * gateways are marked so that the output routines know to address the
142 * gateway rather than the ultimate destination.
145 #include <net/radix.h>
149 struct radix_node rt_nodes[2]; /* tree glue, and other values */
150 #define rt_key(r) ((struct sockaddr *)((r)->rt_nodes->rn_key))
151 #define rt_mask(r) ((struct sockaddr *)((r)->rt_nodes->rn_mask))
152 struct sockaddr *rt_gateway; /* value */
153 long rt_refcnt; /* # held references */
154 u_long rt_flags; /* up/down?, host/net */
155 struct ifnet *rt_ifp; /* the answer: interface to use */
156 struct ifaddr *rt_ifa; /* the answer: interface to use */
157 struct sockaddr *rt_genmask; /* for generation of cloned routes */
158 void *rt_llinfo; /* pointer to link level info cache */
159 struct rt_metrics rt_rmx; /* metrics used by rx'ing protocols */
160 struct rtentry *rt_gwroute; /* implied entry for gatewayed routes */
161 int (*rt_output) (struct ifnet *, struct mbuf *, struct sockaddr *,
163 /* output routine for this (rt,if) */
164 struct rtentry *rt_parent; /* cloning parent of this route */
165 int rt_cpuid; /* owner cpu */
166 struct sockaddr *rt_shim[3]; /* mpls label / operation array */
170 * Following structure necessary for 4.3 compatibility;
171 * We should eventually move it to a compat file.
174 u_long rt_hash; /* to speed lookups */
175 struct sockaddr rt_dst; /* key */
176 struct sockaddr rt_gateway; /* value */
177 short rt_flags; /* up/down?, host/net */
178 short rt_refcnt; /* # held references */
179 u_long rt_use; /* raw # packets forwarded */
180 struct ifnet *rt_ifp; /* the answer: interface to use */
183 #define rt_use rt_rmx.rmx_pksent
185 #define RTF_UP 0x1 /* route usable */
186 #define RTF_GATEWAY 0x2 /* destination is a gateway */
187 #define RTF_HOST 0x4 /* host entry (net otherwise) */
188 #define RTF_REJECT 0x8 /* host or net unreachable */
189 #define RTF_DYNAMIC 0x10 /* created dynamically (by redirect) */
190 #define RTF_MODIFIED 0x20 /* modified dynamically (by redirect) */
191 #define RTF_DONE 0x40 /* message confirmed */
192 /* 0x80 unused, was RTF_DELCLONE */
193 #define RTF_CLONING 0x100 /* generate new routes on use */
194 #define RTF_XRESOLVE 0x200 /* external daemon resolves name */
195 #define RTF_LLINFO 0x400 /* generated by link layer (e.g. ARP) */
196 #define RTF_STATIC 0x800 /* manually added */
197 #define RTF_BLACKHOLE 0x1000 /* just discard pkts (during updates) */
198 #define RTF_PROTO2 0x4000 /* protocol specific routing flag */
199 #define RTF_PROTO1 0x8000 /* protocol specific routing flag */
201 #define RTF_PRCLONING 0x10000 /* protocol requires cloning */
202 #define RTF_WASCLONED 0x20000 /* route generated through cloning */
203 #define RTF_PROTO3 0x40000 /* protocol specific routing flag */
205 #define RTF_PINNED 0x100000 /* future use */
206 #define RTF_LOCAL 0x200000 /* route represents a local address */
207 #define RTF_BROADCAST 0x400000 /* route represents a bcast address */
208 #define RTF_MULTICAST 0x800000 /* route represents a mcast address */
209 #define RTF_MPLSOPS 0x1000000 /* route uses mpls label operations */
210 /* 0x2000000 and up unassigned */
213 * Routing statistics.
215 struct rtstatistics {
216 u_long rts_badredirect; /* bogus redirect calls */
217 u_long rts_dynamic; /* routes created by redirects */
218 u_long rts_newgateway; /* routes modified by redirects */
219 u_long rts_unreach; /* lookups which failed */
220 u_long rts_wildcard; /* lookups satisfied by a wildcard */
223 * Structures for routing messages.
226 u_short rtm_msglen; /* to skip over non-understood messages */
227 u_char rtm_version; /* future binary compatibility */
228 u_char rtm_type; /* message type */
229 u_short rtm_index; /* index for associated ifp */
230 int rtm_flags; /* flags, incl. kern & message, e.g. DONE */
231 int rtm_addrs; /* bitmask identifying sockaddrs in msg */
232 pid_t rtm_pid; /* identify sender */
233 int rtm_seq; /* for sender to identify action */
234 int rtm_errno; /* why failed */
235 int rtm_use; /* from rtentry */
236 u_long rtm_inits; /* which metrics we are initializing */
237 struct rt_metrics rtm_rmx; /* metrics themselves */
240 #define RTM_VERSION 6 /* Up the ante and ignore older versions */
245 #define RTM_ADD 0x1 /* Add Route */
246 #define RTM_DELETE 0x2 /* Delete Route */
247 #define RTM_CHANGE 0x3 /* Change Metrics or flags */
248 #define RTM_GET 0x4 /* Report Metrics */
249 #define RTM_LOSING 0x5 /* Kernel Suspects Partitioning */
250 #define RTM_REDIRECT 0x6 /* Told to use different route */
251 #define RTM_MISS 0x7 /* Lookup failed on this address */
252 #define RTM_LOCK 0x8 /* fix specified metrics */
253 #define RTM_OLDADD 0x9 /* caused by SIOCADDRT */
254 #define RTM_OLDDEL 0xa /* caused by SIOCDELRT */
255 #define RTM_RESOLVE 0xb /* req to resolve dst to LL addr */
256 #define RTM_NEWADDR 0xc /* address being added to iface */
257 #define RTM_DELADDR 0xd /* address being removed from iface */
258 #define RTM_IFINFO 0xe /* iface going up/down etc. */
259 #define RTM_NEWMADDR 0xf /* mcast group membership being added to if */
260 #define RTM_DELMADDR 0x10 /* mcast group membership being deleted */
261 #define RTM_IFANNOUNCE 0x11 /* iface arrival/departure */
262 #define RTM_IEEE80211 0x12 /* IEEE80211 wireless event */
265 * Bitmask values for rtm_inits and rmx_locks.
267 #define RTV_MTU 0x1 /* init or lock _mtu */
268 #define RTV_HOPCOUNT 0x2 /* init or lock _hopcount */
269 #define RTV_EXPIRE 0x4 /* init or lock _expire */
270 #define RTV_RPIPE 0x8 /* init or lock _recvpipe */
271 #define RTV_SPIPE 0x10 /* init or lock _sendpipe */
272 #define RTV_SSTHRESH 0x20 /* init or lock _ssthresh */
273 #define RTV_RTT 0x40 /* init or lock _rtt */
274 #define RTV_RTTVAR 0x80 /* init or lock _rttvar */
275 #define RTV_MSL 0x100 /* init or lock _msl */
278 * Bitmask values for rtm_addrs.
280 #define RTA_DST 0x1 /* destination sockaddr present */
281 #define RTA_GATEWAY 0x2 /* gateway sockaddr present */
282 #define RTA_NETMASK 0x4 /* netmask sockaddr present */
283 #define RTA_GENMASK 0x8 /* cloning mask sockaddr present */
284 #define RTA_IFP 0x10 /* interface name sockaddr present */
285 #define RTA_IFA 0x20 /* interface addr sockaddr present */
286 #define RTA_AUTHOR 0x40 /* sockaddr for author of redirect */
287 #define RTA_BRD 0x80 /* for NEWADDR, broadcast or p-p dest addr */
288 #define RTA_MPLS1 0x100 /* mpls label and/or operation present */
289 #define RTA_MPLS2 0x200 /* mpls label and/or operation present */
290 #define RTA_MPLS3 0x400 /* mpls label and/or operation present */
293 * Index offsets for sockaddr array for alternate internal encoding.
295 #define RTAX_DST 0 /* destination sockaddr present */
296 #define RTAX_GATEWAY 1 /* gateway sockaddr present */
297 #define RTAX_NETMASK 2 /* netmask sockaddr present */
298 #define RTAX_GENMASK 3 /* cloning mask sockaddr present */
299 #define RTAX_IFP 4 /* interface name sockaddr present */
300 #define RTAX_IFA 5 /* interface addr sockaddr present */
301 #define RTAX_AUTHOR 6 /* sockaddr for author of redirect */
302 #define RTAX_BRD 7 /* for NEWADDR, broadcast or p-p dest addr */
303 #define RTAX_MPLS1 8 /* mpls label and/or operation present */
304 #define RTAX_MPLS2 9 /* mpls label and/or operation present */
305 #define RTAX_MPLS3 10 /* mpls label and/or operation present */
306 #define RTAX_MAX 11 /* size of array to allocate */
310 struct sockaddr *rti_info[RTAX_MAX];
312 struct ifaddr *rti_ifa;
313 struct ifnet *rti_ifp;
318 #define rti_dst rti_info[RTAX_DST]
319 #define rti_gateway rti_info[RTAX_GATEWAY]
320 #define rti_netmask rti_info[RTAX_NETMASK]
321 #define rti_genmask rti_info[RTAX_GENMASK]
322 #define rti_ifpaddr rti_info[RTAX_IFP]
323 #define rti_ifaaddr rti_info[RTAX_IFA]
324 #define rti_author rti_info[RTAX_AUTHOR]
325 #define rti_bcastaddr rti_info[RTAX_BRD]
326 #define rti_mpls1 rti_info[RTAX_MPLS1]
327 #define rti_mpls2 rti_info[RTAX_MPLS2]
328 #define rti_mpls3 rti_info[RTAX_MPLS3]
330 extern struct radix_node_head *rt_tables[MAXCPU][AF_MAX+1];
331 extern struct lwkt_port *rt_ports[MAXCPU];
337 void route_init (void);
338 void rt_dstmsg(int type, struct sockaddr *dst, int error);
339 int rt_getifa (struct rt_addrinfo *);
340 void rt_ieee80211msg(struct ifnet *, int, void *, size_t);
341 void rt_ifannouncemsg (struct ifnet *, int);
342 void rt_ifmsg (struct ifnet *);
343 int rt_llroute (struct sockaddr *dst, struct rtentry *rt0,
344 struct rtentry **drt);
345 void rt_missmsg (int, struct rt_addrinfo *, int, int);
346 void rt_newaddrmsg (int, struct ifaddr *, int, struct rtentry *);
347 void rt_newmaddrmsg (int, struct ifmultiaddr *);
348 void rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error);
349 int rt_setgate (struct rtentry *,
350 struct sockaddr *, struct sockaddr *, boolean_t);
351 void rtalloc (struct route *);
352 void rtalloc_ign (struct route *, u_long);
355 _rtlookup (struct sockaddr *, __boolean_t, u_long);
356 #define RTL_REPORTMSG TRUE
357 #define RTL_DONTREPORT FALSE
359 /* flags to ignore */
360 #define RTL_DOCLONE 0UL
361 #define RTL_DONTCLONE (RTF_CLONING | RTF_PRCLONING)
364 * Look up a route with no cloning side-effects or miss reports generated.
366 static __inline struct rtentry *
367 rtpurelookup(struct sockaddr *dst)
369 return _rtlookup(dst, RTL_DONTREPORT, RTL_DONTCLONE);
373 * Do full route lookup with cloning and reporting on misses.
375 static __inline struct rtentry *
376 rtlookup(struct sockaddr *dst)
378 return _rtlookup(dst, RTL_REPORTMSG, RTL_DOCLONE);
381 typedef void (*rtrequest1_callback_func_t)(int, int, struct rt_addrinfo *,
382 struct rtentry *, void *);
383 typedef int (*rtsearch_callback_func_t)(int, struct rt_addrinfo *,
384 struct rtentry *, void *, int);
386 void rtfree (struct rtentry *);
387 int rtinit (struct ifaddr *, int, int);
388 int rtioctl (u_long, caddr_t, struct ucred *);
389 void rtredirect (struct sockaddr *, struct sockaddr *,
390 struct sockaddr *, int, struct sockaddr *);
391 int rtrequest (int, struct sockaddr *,
392 struct sockaddr *, struct sockaddr *, int, struct rtentry **);
393 int rtrequest_global (int, struct sockaddr *,
394 struct sockaddr *, struct sockaddr *, int);
395 int rtrequest1 (int, struct rt_addrinfo *, struct rtentry **);
396 int rtrequest1_global (int, struct rt_addrinfo *, rtrequest1_callback_func_t, void *);
398 #define RTS_EXACTMATCH TRUE
399 #define RTS_NOEXACTMATCH FALSE
401 int rtsearch_global(int, struct rt_addrinfo *,
402 rtsearch_callback_func_t, void *, boolean_t);
404 int rtmask_add_global(struct sockaddr *);
406 struct sockaddr *_rtmask_lookup(struct sockaddr *, boolean_t);
408 static __inline struct sockaddr *
409 rtmask_lookup(struct sockaddr *_mask)
411 return _rtmask_lookup(_mask, FALSE);
414 static __inline struct sockaddr *
415 rtmask_purelookup(struct sockaddr *_mask)
417 return _rtmask_lookup(_mask, TRUE);
420 void rtfree_oncpu(struct rtentry *);
421 void rtfree_remote(struct rtentry *, int);
422 void rt_print(struct rt_addrinfo *, struct rtentry *);
423 void rt_addrinfo_print(int cmd, struct rt_addrinfo *);
424 void sockaddr_print(struct sockaddr *);
426 #ifndef _SYS_GLOBALDATA_H_
427 #include <sys/globaldata.h>
431 RTFREE(struct rtentry *rt)
433 if (rt->rt_cpuid == mycpuid) {
434 if (rt->rt_refcnt <= 1)
439 rtfree_remote(rt, 1);
445 rtable_portfn(int cpu)
447 return (rt_ports[cpu]);
450 int in_inithead(void **, int);