2 * Copyright (c) 1983, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgment:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)defs.h 8.1 (Berkeley) 6/5/93
35 * $FreeBSD: src/sbin/routed/defs.h,v 1.13 1999/09/05 17:49:11 peter Exp $
39 #ident "$FreeBSD: src/sbin/routed/defs.h,v 1.13 1999/09/05 17:49:11 peter Exp $"
42 /* Definitions for RIPv2 routing process.
44 * This code is based on the 4.4BSD `routed` daemon, with extensions to
46 * RIPv2, including variable length subnet masks.
48 * aggregate routes in the kernel tables.
49 * aggregate advertised routes.
50 * maintain spare routes for faster selection of another gateway
51 * when the current gateway dies.
52 * timers on routes with second granularity so that selection
53 * of a new route does not wait 30-60 seconds.
54 * tolerance of static routes.
55 * tell the kernel hop counts
56 * do not advertise if ipforwarding=0
58 * The vestigial support for other protocols has been removed. There
59 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with
60 * other protocols. The result is far smaller, faster, cleaner, and
61 * perhaps understandable.
63 * The accumulation of special flags and kludges added over the many
64 * years have been simplified and integrated.
80 #include <sys/cdefs.h>
82 #include <sys/types.h>
83 #include <sys/param.h>
84 #include <sys/ioctl.h>
85 #include <sys/sysctl.h>
86 #include <sys/socket.h>
88 #define _USER_ROUTE_TREE
89 #include <net/radix.h>
92 #define UNUSED __attribute__((unused))
93 #define PATTRIB(f,l) __attribute__((format (printf,f,l)))
96 #include <net/route.h>
97 #include <net/if_dl.h>
98 #include <netinet/in.h>
99 #include <arpa/inet.h>
100 #define RIPVERSION RIPv2
101 #include <protocols/routed.h>
104 /* Type of an IP address.
105 * Some systems do not like to pass structures, so do not use in_addr.
106 * Some systems think a long has 64 bits, which would be a gross waste.
107 * So define it here so it can be changed for the target system.
108 * It should be defined somewhere netinet/in.h, but it is not.
111 #define naddr u_int32_t
112 #elif defined (__NetBSD__)
113 #define naddr u_int32_t
115 #define _HAVE_SIN_LEN
119 #define _HAVE_SIN_LEN
122 /* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at
123 * the dstaddr of point-to-point interfaces.
126 #define MCAST_PPP_BUG
129 #define DAY (24*60*60)
130 #define NEVER DAY /* a long time */
131 #define EPOCH NEVER /* bias time by this to avoid <0 */
133 /* Scan the kernel regularly to see if any interfaces have appeared or been
134 * turned off. These must be less than STALE_TIME.
136 #define CHECK_BAD_INTERVAL 5 /* when an interface is known bad */
137 #define CHECK_ACT_INTERVAL 30 /* when advertising */
138 #define CHECK_QUIET_INTERVAL 300 /* when not */
140 #define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l)))
142 /* Metric used for fake default routes. It ought to be 15, but when
143 * processing advertised routes, previous versions of `routed` added
144 * to the received metric and discarded the route if the total was 16
147 #define FAKE_METRIC (HOPCNT_INFINITY-2)
150 /* Router Discovery parameters */
152 #define INADDR_ALLROUTERS_GROUP 0xe0000002 /* 224.0.0.2 */
154 #define MaxMaxAdvertiseInterval 1800
155 #define MinMaxAdvertiseInterval 4
156 #define DefMaxAdvertiseInterval 600
157 #define DEF_PreferenceLevel 0
158 #define MIN_PreferenceLevel 0x80000000
160 #define MAX_INITIAL_ADVERT_INTERVAL 16
161 #define MAX_INITIAL_ADVERTS 3
162 #define MAX_RESPONSE_DELAY 2
164 #define MAX_SOLICITATION_DELAY 1
165 #define SOLICITATION_INTERVAL 3
166 #define MAX_SOLICITATIONS 3
169 /* Bloated packet size for systems that simply add authentication to
172 #define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof(struct netinfo)*2)
173 /* typical packet buffers */
175 char packet[OVER_MAXPACKETSIZE*2];
179 #define GNAME_LEN 64 /* assumed=64 in parms.c */
180 /* bigger than IFNAMSIZ, with room for "external()" or "remote()" */
181 #define IF_NAME_LEN (GNAME_LEN+15)
183 /* No more routes than this, to protect ourself in case something goes
184 * whacko and starts broadcasting zillions of bogus routes.
186 #define MAX_ROUTES (128*1024)
187 extern int total_routes;
189 /* Main, daemon routing table structure
192 struct radix_node rt_nodes[2]; /* radix tree glue */
194 # define RS_IF 0x001 /* for network interface */
195 # define RS_NET_INT 0x002 /* authority route */
196 # define RS_NET_SYN 0x004 /* fake net route for subnet */
197 # define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF)
198 # define RS_SUBNET 0x008 /* subnet route from any source */
199 # define RS_LOCAL 0x010 /* loopback for pt-to-pt */
200 # define RS_MHOME 0x020 /* from -m */
201 # define RS_STATIC 0x040 /* from the kernel */
202 # define RS_RDISC 0x080 /* from router discovery */
203 struct sockaddr_in rt_dst_sock;
206 struct interface *rts_ifp;
207 naddr rts_gate; /* forward packets here */
208 naddr rts_router; /* on the authority of this router */
211 time_t rts_time; /* timer to junk stale routes */
212 u_int rts_de_ag; /* de-aggregation level */
214 } rt_spares[NUM_SPARES];
215 u_int rt_seqno; /* when last changed */
216 char rt_poison_metric; /* to notice maximum recently */
217 time_t rt_poison_time; /* advertised metric */
219 #define rt_dst rt_dst_sock.sin_addr.s_addr
220 #define rt_ifp rt_spares[0].rts_ifp
221 #define rt_gate rt_spares[0].rts_gate
222 #define rt_router rt_spares[0].rts_router
223 #define rt_metric rt_spares[0].rts_metric
224 #define rt_tag rt_spares[0].rts_tag
225 #define rt_time rt_spares[0].rts_time
226 #define rt_de_ag rt_spares[0].rts_de_ag
228 #define HOST_MASK 0xffffffff
229 #define RT_ISHOST(rt) ((rt)->rt_mask == HOST_MASK)
231 /* age all routes that
232 * are not from -g, -m, or static routes from the kernel
233 * not unbroken interface routes
234 * but not broken interfaces
235 * nor non-passive, remote interfaces that are not aliases
236 * (i.e. remote & metric=0)
238 #define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC \
239 | RS_NET_SYN | RS_RDISC)) \
240 && (!((rt_state) & RS_IF) \
242 || (((ifp)->int_state & IS_REMOTE) \
243 && !((ifp)->int_state & IS_PASSIVE))))
245 /* true if A is better than B
247 * - A is not a poisoned route
248 * - and A is not stale
249 * - and A has a shorter path
250 * - or is the router speaking for itself
251 * - or the current route is equal but stale
252 * - or it is a host route advertised by a system for itself
254 #define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY \
255 && now_stale <= (A)->rts_time \
256 && ((A)->rts_metric < (B)->rts_metric \
257 || ((A)->rts_gate == (A)->rts_router \
258 && (B)->rts_gate != (B)->rts_router) \
259 || ((A)->rts_metric == (B)->rts_metric \
260 && now_stale > (B)->rts_time) \
262 && (rt)->rt_dst == (A)->rts_router \
263 && (A)->rts_metric == (B)->rts_metric)))
266 /* An "interface" is similar to a kernel ifnet structure, except it also
267 * handles "logical" or "IS_REMOTE" interfaces (remote gateways).
270 struct interface *int_next, **int_prev;
271 struct interface *int_ahash, **int_ahash_prev;
272 struct interface *int_bhash, **int_bhash_prev;
273 struct interface *int_rlink, **int_rlink_prev;
274 struct interface *int_nhash, **int_nhash_prev;
275 char int_name[IF_NAME_LEN+1];
277 naddr int_addr; /* address on this host (net order) */
278 naddr int_brdaddr; /* broadcast address (n) */
279 naddr int_dstaddr; /* other end of pt-to-pt link (n) */
280 naddr int_net; /* working network # (host order)*/
281 naddr int_mask; /* working net mask (host order) */
282 naddr int_ripv1_mask; /* for inferring a mask (n) */
283 naddr int_std_addr; /* class A/B/C address (n) */
284 naddr int_std_net; /* class A/B/C network (h) */
285 naddr int_std_mask; /* class A/B/C netmask (h) */
286 int int_rip_sock; /* for queries */
287 int int_if_flags; /* some bits copied from kernel */
289 time_t int_act_time; /* last thought healthy */
290 time_t int_query_time;
291 u_short int_transitions; /* times gone up-down */
293 char int_d_metric; /* for faked default route */
295 u_int ipackets; /* previous network stats */
302 time_t ts; /* timestamp on network stats */
304 # define MAX_AUTH_KEYS 5
305 struct auth { /* authentication info */
307 u_char key[RIP_AUTH_PW_LEN];
310 } int_auth[MAX_AUTH_KEYS];
311 /* router discovery parameters */
312 int int_rdisc_pref; /* signed preference to advertise */
313 int int_rdisc_int; /* MaxAdvertiseInterval */
315 struct timeval int_rdisc_timer;
318 /* bits in int_state */
319 #define IS_ALIAS 0x0000001 /* interface alias */
320 #define IS_SUBNET 0x0000002 /* interface on subnetted network */
321 #define IS_REMOTE 0x0000004 /* interface is not on this machine */
322 #define IS_PASSIVE 0x0000008 /* remote and does not do RIP */
323 #define IS_EXTERNAL 0x0000010 /* handled by EGP or something */
324 #define IS_CHECKED 0x0000020 /* still exists */
325 #define IS_ALL_HOSTS 0x0000040 /* in INADDR_ALLHOSTS_GROUP */
326 #define IS_ALL_ROUTERS 0x0000080 /* in INADDR_ALLROUTERS_GROUP */
327 #define IS_DISTRUST 0x0000100 /* ignore untrusted routers */
328 #define IS_REDIRECT_OK 0x0000200 /* accept ICMP redirects */
329 #define IS_BROKE 0x0000400 /* seems to be broken */
330 #define IS_SICK 0x0000800 /* seems to be broken */
331 #define IS_DUP 0x0001000 /* has a duplicate address */
332 #define IS_NEED_NET_SYN 0x0002000 /* need RS_NET_SYN route */
333 #define IS_NO_AG 0x0004000 /* do not aggregate subnets */
334 #define IS_NO_SUPER_AG 0x0008000 /* do not aggregate networks */
335 #define IS_NO_RIPV1_IN 0x0010000 /* no RIPv1 input at all */
336 #define IS_NO_RIPV2_IN 0x0020000 /* no RIPv2 input at all */
337 #define IS_NO_RIP_IN (IS_NO_RIPV1_IN | IS_NO_RIPV2_IN)
338 #define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN)
339 #define IS_NO_RIPV1_OUT 0x0040000 /* no RIPv1 output at all */
340 #define IS_NO_RIPV2_OUT 0x0080000 /* no RIPv2 output at all */
341 #define IS_NO_RIP_OUT (IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT)
342 #define IS_NO_RIP (IS_NO_RIP_OUT | IS_NO_RIP_IN)
343 #define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT)
344 #define IS_RIP_OFF(s) (((s) & IS_NO_RIP) == IS_NO_RIP)
345 #define IS_NO_RIP_MCAST 0x0100000 /* broadcast RIPv2 */
346 #define IS_NO_ADV_IN 0x0200000 /* do not listen to advertisements */
347 #define IS_NO_SOL_OUT 0x0400000 /* send no solicitations */
348 #define IS_SOL_OUT 0x0800000 /* send solicitations */
349 #define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT)
350 #define IS_NO_ADV_OUT 0x1000000 /* do not advertise rdisc */
351 #define IS_ADV_OUT 0x2000000 /* advertise rdisc */
352 #define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT)
353 #define IS_BCAST_RDISC 0x4000000 /* broadcast instead of multicast */
354 #define IS_NO_RDISC (IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT)
355 #define IS_PM_RDISC 0x8000000 /* poor-man's router discovery */
357 #define iff_up(f) ((f) & IFF_UP)
360 /* Information for aggregating routes */
361 #define NUM_AG_SLOTS 32
363 struct ag_info *ag_fine; /* slot with finer netmask */
364 struct ag_info *ag_cors; /* more coarse netmask */
365 naddr ag_dst_h; /* destination in host byte order */
369 char ag_metric; /* metric to be advertised */
370 char ag_pref; /* aggregate based on this */
374 #define AGS_SUPPRESS 0x001 /* combine with coarser mask */
375 #define AGS_AGGREGATE 0x002 /* synthesize combined routes */
376 #define AGS_REDUN0 0x004 /* redundant, finer routes output */
377 #define AGS_REDUN1 0x008
378 #define AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \
379 == (AGS_REDUN0 | AGS_REDUN1))
380 #define AGS_GATEWAY 0x010 /* tell kernel RTF_GATEWAY */
381 #define AGS_IF 0x020 /* for an interface */
382 #define AGS_RIPV2 0x040 /* send only as RIPv2 */
383 #define AGS_FINE_GATE 0x080 /* ignore differing ag_gate when this
384 * has the finer netmask */
385 #define AGS_CORS_GATE 0x100 /* ignore differing gate when this
386 * has the coarser netmasks */
387 #define AGS_SPLIT_HZ 0x200 /* suppress for split horizon */
389 /* some bits are set if they are set on either route */
390 #define AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY | \
391 AGS_SUPPRESS | AGS_CORS_GATE)
395 /* parameters for interfaces */
397 struct parm *parm_next;
398 char parm_name[IF_NAME_LEN+1];
403 u_int parm_int_state;
404 int parm_rdisc_pref; /* signed IRDP preference */
405 int parm_rdisc_int; /* IRDP advertising interval */
406 struct auth parm_auth[MAX_AUTH_KEYS];
409 /* authority for internal networks */
410 extern struct intnet {
411 struct intnet *intnet_next;
412 naddr intnet_addr; /* network byte order */
417 /* defined RIPv1 netmasks */
418 extern struct r1net {
419 struct r1net *r1net_next;
420 naddr r1net_net; /* host order */
425 /* trusted routers */
426 extern struct tgate {
427 struct tgate *tgate_next;
429 #define MAX_TGATE_NETS 32
431 naddr net; /* host order */
433 } tgate_nets[MAX_TGATE_NETS];
436 enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST,
437 NO_OUT_MULTICAST, NO_OUT_RIPV2};
439 /* common output buffers */
440 extern struct ws_buf {
443 struct netinfo *base;
445 enum output_type type;
449 extern naddr myaddr; /* main address of this system */
451 extern int stopint; /* !=0 to stop */
454 extern int rip_sock; /* RIP socket */
455 extern struct interface *rip_sock_mcast; /* current multicast interface */
456 extern int rt_sock; /* routing socket */
457 extern int rt_sock_seqno;
458 extern int rdisc_sock; /* router-discovery raw socket */
460 extern int seqno; /* sequence number for messages */
461 extern int supplier; /* process should supply updates */
462 extern int supplier_set; /* -s or -q requested */
463 extern int lookforinterfaces; /* 1=probe for new up interfaces */
464 extern int ridhosts; /* 1=reduce host routes */
465 extern int mhome; /* 1=want multi-homed host route */
466 extern int advertise_mhome; /* 1=must continue advertising it */
467 extern int auth_ok; /* 1=ignore auth if we do not care */
469 extern struct timeval clk; /* system clock's idea of time */
470 extern struct timeval epoch; /* system clock when started */
471 extern struct timeval now; /* current idea of time */
472 extern time_t now_stale;
473 extern time_t now_expire;
474 extern time_t now_garbage;
476 extern struct timeval next_bcast; /* next general broadcast */
477 extern struct timeval age_timer; /* next check of old routes */
478 extern struct timeval no_flash; /* inhibit flash update until then */
479 extern struct timeval rdisc_timer; /* next advert. or solicitation */
480 extern int rdisc_ok; /* using solicited route */
482 extern struct timeval ifinit_timer; /* time to check interfaces */
484 extern naddr loopaddr; /* our address on loopback */
485 extern int tot_interfaces; /* # of remote and local interfaces */
486 extern int rip_interfaces; /* # of interfaces doing RIP */
487 extern struct interface *ifnet; /* all interfaces */
488 extern struct interface *remote_if; /* remote interfaces */
489 extern int have_ripv1_out; /* have a RIPv1 interface */
490 extern int have_ripv1_in;
491 extern int need_flash; /* flash update needed */
492 extern struct timeval need_kern; /* need to update kernel table */
493 extern u_int update_seqno; /* a route has changed */
495 extern int tracelevel, new_tracelevel;
496 #define MAX_TRACELEVEL 4
497 #define TRACEKERNEL (tracelevel >= 4) /* log kernel changes */
498 #define TRACECONTENTS (tracelevel >= 3) /* display packet contents */
499 #define TRACEPACKETS (tracelevel >= 2) /* note packets */
500 #define TRACEACTIONS (tracelevel != 0)
501 extern FILE *ftrace; /* output trace file */
502 extern char inittracename[MAXPATHLEN+1];
504 extern struct radix_node_head *rhead;
509 #define dup2(x,y) BSDdup2(x,y)
512 extern void fix_sock(int, const char *);
513 extern void fix_select(void);
514 extern void rip_off(void);
515 extern void rip_on(struct interface *);
517 extern void bufinit(void);
518 extern int output(enum output_type, struct sockaddr_in *,
519 struct interface *, struct rip *, int);
520 extern void clr_ws_buf(struct ws_buf *, struct auth *);
521 extern void rip_query(void);
522 extern void rip_bcast(int);
523 extern void supply(struct sockaddr_in *, struct interface *,
524 enum output_type, int, int, int);
526 extern void msglog(const char *, ...) PATTRIB(1,2);
532 # define MSG_SUBJECT_N 8
533 } subs[MSG_SUBJECT_N];
535 extern void msglim(struct msg_limit *, naddr,
536 const char *, ...) PATTRIB(3,4);
537 #define LOGERR(msg) msglog(msg ": %s", strerror(errno))
538 extern void logbad(int, const char *, ...) PATTRIB(2,3);
539 #define BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno))
541 #define DBGERR(dump,msg) BADERR(dump,msg)
543 #define DBGERR(dump,msg) LOGERR(msg)
545 extern char *naddr_ntoa(naddr);
546 extern const char *saddr_ntoa(struct sockaddr *);
548 extern void *rtmalloc(size_t, const char *);
549 extern void timevaladd(struct timeval *, struct timeval *);
550 extern void intvl_random(struct timeval *, u_long, u_long);
551 extern int getnet(char *, naddr *, naddr *);
552 extern int gethost(char *, naddr *);
553 extern void gwkludge(void);
554 extern const char *parse_parms(char *, int);
555 extern const char *check_parms(struct parm *);
556 extern void get_parms(struct interface *);
558 extern void lastlog(void);
559 extern void trace_close(int);
560 extern void set_tracefile(const char *, const char *, int);
561 extern void tracelevel_msg(const char *, int);
562 extern void trace_off(const char*, ...) PATTRIB(1,2);
563 extern void set_tracelevel(void);
564 extern void trace_flush(void);
565 extern void trace_misc(const char *, ...) PATTRIB(1,2);
566 extern void trace_act(const char *, ...) PATTRIB(1,2);
567 extern void trace_pkt(const char *, ...) PATTRIB(1,2);
568 extern void trace_add_del(const char *, struct rt_entry *);
569 extern void trace_change(struct rt_entry *, u_int, struct rt_spare *,
571 extern void trace_if(const char *, struct interface *);
572 extern void trace_upslot(struct rt_entry *, struct rt_spare *,
574 extern void trace_rip(const char*, const char*, struct sockaddr_in *,
575 struct interface *, struct rip *, int);
576 extern char *addrname(naddr, naddr, int);
577 extern char *rtname(naddr, naddr, naddr);
579 extern void rdisc_age(naddr);
580 extern void set_rdisc_mg(struct interface *, int);
581 extern void set_supplier(void);
582 extern void if_bad_rdisc(struct interface *);
583 extern void if_ok_rdisc(struct interface *);
584 extern void read_rip(int, struct interface *);
585 extern void read_rt(void);
586 extern void read_d(void);
587 extern void rdisc_adv(void);
588 extern void rdisc_sol(void);
590 extern void sigalrm(int);
591 extern void sigterm(int);
593 extern void sigtrace_on(int);
594 extern void sigtrace_off(int);
596 extern void flush_kern(void);
597 extern void age(naddr);
599 extern void ag_flush(naddr, naddr, void (*)(struct ag_info *));
600 extern void ag_check(naddr, naddr, naddr, naddr, char, char, u_int,
601 u_short, u_short, void (*)(struct ag_info *));
602 extern void del_static(naddr, naddr, naddr, int);
603 extern void del_redirects(naddr, time_t);
604 extern struct rt_entry *rtget(naddr, naddr);
605 extern struct rt_entry *rtfind(naddr);
606 extern void rtinit(void);
607 extern void rtadd(naddr, naddr, u_int, struct rt_spare *);
608 extern void rtchange(struct rt_entry *, u_int, struct rt_spare *, char *);
609 extern void rtdelete(struct rt_entry *);
610 extern void rts_delete(struct rt_entry *, struct rt_spare *);
611 extern void rtbad_sub(struct rt_entry *);
612 extern void rtswitch(struct rt_entry *, struct rt_spare *);
613 extern void rtbad(struct rt_entry *);
615 #define S_ADDR(x) (((struct sockaddr_in *)(x))->sin_addr.s_addr)
616 #define INFO_DST(I) ((I)->rti_info[RTAX_DST])
617 #define INFO_GATE(I) ((I)->rti_info[RTAX_GATEWAY])
618 #define INFO_MASK(I) ((I)->rti_info[RTAX_NETMASK])
619 #define INFO_IFA(I) ((I)->rti_info[RTAX_IFA])
620 #define INFO_IFP(I) ((I)->rti_info[RTAX_IFP])
621 #define INFO_AUTHOR(I) ((I)->rti_info[RTAX_AUTHOR])
622 #define INFO_BRD(I) ((I)->rti_info[RTAX_BRD])
623 void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *,
626 extern naddr std_mask(naddr);
627 extern naddr ripv1_mask_net(naddr, struct interface *);
628 extern naddr ripv1_mask_host(naddr,struct interface *);
629 #define on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0)
630 extern int check_dst(naddr);
631 extern struct interface *check_dup(naddr, naddr, naddr, int);
632 extern int check_remote(struct interface *);
633 extern int addrouteforif(struct interface *);
634 extern void ifinit(void);
635 extern int walk_bad(struct radix_node *, struct walkarg *);
636 extern int if_ok(struct interface *, const char *);
637 extern void if_sick(struct interface *);
638 extern void if_bad(struct interface *);
639 extern void if_link(struct interface *);
640 extern struct interface *ifwithaddr(naddr, int, int);
641 extern struct interface *ifwithname(char *, naddr);
642 extern struct interface *ifwithindex(u_short, int);
643 extern struct interface *iflookup(naddr);
645 extern struct auth *find_auth(struct interface *);
646 extern void end_md5_auth(struct ws_buf *, struct auth *);
648 #define MD5_DIGEST_LEN 16
650 u_int32_t state[4]; /* state (ABCD) */
651 u_int32_t count[2]; /* # of bits, modulo 2^64 (LSB 1st) */
652 unsigned char buffer[64]; /* input buffer */
654 extern void MD5Init(MD5_CTX*);
655 extern void MD5Update(MD5_CTX*, u_char*, u_int);
656 extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*);