summaryrefslogtreecommitdiffstats
path: root/sbin/routed/defs.h
blob: ad0429656ff937fd00b053c4cc54012c196259bd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
/*
 * Copyright (c) 1983, 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgment:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)defs.h	8.1 (Berkeley) 6/5/93
 *
 * $FreeBSD$
 */

#ifdef  sgi
#ident "$Revision: 1.11 $"
#endif

/* Definitions for RIPv2 routing process.
 *
 * This code is based on the 4.4BSD `routed` daemon, with extensions to
 * support:
 *	RIPv2, including variable length subnet masks.
 *	Router Discovery
 *	aggregate routes in the kernel tables.
 *	aggregate advertised routes.
 *	maintain spare routes for faster selection of another gateway
 *		when the current gateway dies.
 *	timers on routes with second granularity so that selection
 *		of a new route does not wait 30-60 seconds.
 *	tolerance of static routes.
 *	tell the kernel hop counts
 *	do not advertise if ipforwarding=0
 *
 * The vestigial support for other protocols has been removed.  There
 * is no likelihood that IETF RIPv1 or RIPv2 will ever be used with
 * other protocols.  The result is far smaller, faster, cleaner, and
 * perhaps understandable.
 *
 * The accumulation of special flags and kludges added over the many
 * years have been simplified and integrated.
 */

#include <stdio.h>
#include <netdb.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#ifdef sgi
#include <strings.h>
#include <bstring.h>
#endif
#include <stdarg.h>
#include <syslog.h>
#include <time.h>
#include <sys/cdefs.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/socket.h>
#ifdef sgi
#define _USER_ROUTE_TREE
#include <net/radix.h>
#else
#include "radix.h"
#define UNUSED __attribute__((unused))
#define PATTRIB(f,l) __attribute__((format (printf,f,l)))
#endif
#include <net/if.h>
#include <net/route.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define RIPVERSION RIPv2
#include <protocols/routed.h>


/* Type of an IP address.
 *	Some systems do not like to pass structures, so do not use in_addr.
 *	Some systems think a long has 64 bits, which would be a gross waste.
 * So define it here so it can be changed for the target system.
 * It should be defined somewhere netinet/in.h, but it is not.
 */
#ifdef sgi
#define naddr u_int32_t
#elif defined (__NetBSD__)
#define naddr u_int32_t
#define _HAVE_SA_LEN
#define _HAVE_SIN_LEN
#else
#define naddr u_long
#define _HAVE_SA_LEN
#define _HAVE_SIN_LEN
#endif

/* Turn on if IP_DROP_MEMBERSHIP and IP_ADD_MEMBERSHIP do not look at
 * the dstaddr of point-to-point interfaces.
 */
#ifdef __NetBSD__
#define MCAST_PPP_BUG
#endif

#define DAY (24*60*60)
#define NEVER DAY			/* a long time */
#define EPOCH NEVER			/* bias time by this to avoid <0 */

/* Scan the kernel regularly to see if any interfaces have appeared or been
 * turned off.  These must be less than STALE_TIME.
 */
#define	CHECK_BAD_INTERVAL	5	/* when an interface is known bad */
#define	CHECK_ACT_INTERVAL	30	/* when advertising */
#define	CHECK_QUIET_INTERVAL	300	/* when not */

#define LIM_SEC(s,l) ((s).tv_sec = MIN((s).tv_sec, (l)))

/* Metric used for fake default routes.  It ought to be 15, but when
 * processing advertised routes, previous versions of `routed` added
 * to the received metric and discarded the route if the total was 16
 * or larger.
 */
#define FAKE_METRIC (HOPCNT_INFINITY-2)


/* Router Discovery parameters */
#ifndef sgi
#define INADDR_ALLROUTERS_GROUP		0xe0000002  /* 224.0.0.2 */
#endif
#define	MaxMaxAdvertiseInterval		1800
#define	MinMaxAdvertiseInterval		4
#define	DefMaxAdvertiseInterval		600
#define DEF_PreferenceLevel		0
#define MIN_PreferenceLevel		0x80000000

#define	MAX_INITIAL_ADVERT_INTERVAL	16
#define	MAX_INITIAL_ADVERTS		3
#define	MAX_RESPONSE_DELAY		2

#define	MAX_SOLICITATION_DELAY		1
#define	SOLICITATION_INTERVAL		3
#define	MAX_SOLICITATIONS		3


/* Bloated packet size for systems that simply add authentication to
 * full-sized packets
 */
#define OVER_MAXPACKETSIZE (MAXPACKETSIZE+sizeof(struct netinfo)*2)
/* typical packet buffers */
union pkt_buf {
	char	packet[OVER_MAXPACKETSIZE*2];
	struct	rip rip;
};

#define GNAME_LEN   64			/* assumed=64 in parms.c */
/* bigger than IFNAMSIZ, with room for "external()" or "remote()" */
#define IF_NAME_LEN (GNAME_LEN+15)

/* No more routes than this, to protect ourself in case something goes
 * whacko and starts broadcasting zillions of bogus routes.
 */
#define MAX_ROUTES  (128*1024)
extern int total_routes;

/* Main, daemon routing table structure
 */
struct rt_entry {
	struct	radix_node rt_nodes[2];	/* radix tree glue */
	u_int	rt_state;
#	    define RS_IF	0x001	/* for network interface */
#	    define RS_NET_INT	0x002	/* authority route */
#	    define RS_NET_SYN	0x004	/* fake net route for subnet */
#	    define RS_NO_NET_SYN (RS_LOCAL | RS_LOCAL | RS_IF)
#	    define RS_SUBNET	0x008	/* subnet route from any source */
#	    define RS_LOCAL	0x010	/* loopback for pt-to-pt */
#	    define RS_MHOME	0x020	/* from -m */
#	    define RS_STATIC	0x040	/* from the kernel */
#	    define RS_RDISC     0x080	/* from router discovery */
	struct sockaddr_in rt_dst_sock;
	naddr   rt_mask;
	struct rt_spare {
	    struct interface *rts_ifp;
	    naddr   rts_gate;		/* forward packets here */
	    naddr   rts_router;		/* on the authority of this router */
	    char    rts_metric;
	    u_short rts_tag;
	    time_t  rts_time;		/* timer to junk stale routes */
	    u_int   rts_de_ag;		/* de-aggregation level */
#define NUM_SPARES 4
	} rt_spares[NUM_SPARES];
	u_int	rt_seqno;		/* when last changed */
	char	rt_poison_metric;	/* to notice maximum recently */
	time_t	rt_poison_time;		/*	advertised metric */
};
#define rt_dst	    rt_dst_sock.sin_addr.s_addr
#define rt_ifp	    rt_spares[0].rts_ifp
#define rt_gate	    rt_spares[0].rts_gate
#define rt_router   rt_spares[0].rts_router
#define rt_metric   rt_spares[0].rts_metric
#define rt_tag	    rt_spares[0].rts_tag
#define rt_time	    rt_spares[0].rts_time
#define rt_de_ag    rt_spares[0].rts_de_ag

#define HOST_MASK	0xffffffff
#define RT_ISHOST(rt)	((rt)->rt_mask == HOST_MASK)

/* age all routes that
 *	are not from -g, -m, or static routes from the kernel
 *	not unbroken interface routes
 *		but not broken interfaces
 *	nor non-passive, remote interfaces that are not aliases
 *		(i.e. remote & metric=0)
 */
#define AGE_RT(rt_state,ifp) (0 == ((rt_state) & (RS_MHOME | RS_STATIC	    \
						  | RS_NET_SYN | RS_RDISC)) \
			      && (!((rt_state) & RS_IF)			    \
				  || (ifp) == 0				    \
				  || (((ifp)->int_state & IS_REMOTE)	    \
				      && !((ifp)->int_state & IS_PASSIVE))))

/* true if A is better than B
 * Better if
 *	- A is not a poisoned route
 *	- and A is not stale
 *	- and A has a shorter path
 *		- or is the router speaking for itself
 *		- or the current route is equal but stale
 *		- or it is a host route advertised by a system for itself
 */
#define BETTER_LINK(rt,A,B) ((A)->rts_metric < HOPCNT_INFINITY		\
			     && now_stale <= (A)->rts_time		\
			     && ((A)->rts_metric < (B)->rts_metric	\
				 || ((A)->rts_gate == (A)->rts_router	\
				     && (B)->rts_gate != (B)->rts_router) \
				 || ((A)->rts_metric == (B)->rts_metric	\
				     && now_stale > (B)->rts_time)	\
				 || (RT_ISHOST(rt)			\
				     && (rt)->rt_dst == (A)->rts_router	\
				     && (A)->rts_metric == (B)->rts_metric)))


/* An "interface" is similar to a kernel ifnet structure, except it also
 * handles "logical" or "IS_REMOTE" interfaces (remote gateways).
 */
struct interface {
	struct interface *int_next, **int_prev;
	struct interface *int_ahash, **int_ahash_prev;
	struct interface *int_bhash, **int_bhash_prev;
	struct interface *int_rlink, **int_rlink_prev;
	struct interface *int_nhash, **int_nhash_prev;
	char	int_name[IF_NAME_LEN+1];
	u_short	int_index;
	naddr	int_addr;		/* address on this host (net order) */
	naddr	int_brdaddr;		/* broadcast address (n) */
	naddr	int_dstaddr;		/* other end of pt-to-pt link (n) */
	naddr	int_net;		/* working network # (host order)*/
	naddr	int_mask;		/* working net mask (host order) */
	naddr	int_ripv1_mask;		/* for inferring a mask (n) */
	naddr	int_std_addr;		/* class A/B/C address (n) */
	naddr	int_std_net;		/* class A/B/C network (h) */
	naddr	int_std_mask;		/* class A/B/C netmask (h) */
	int	int_rip_sock;		/* for queries */
	int	int_if_flags;		/* some bits copied from kernel */
	u_int	int_state;
	time_t	int_act_time;		/* last thought healthy */
	time_t	int_query_time;
	u_short	int_transitions;	/* times gone up-down */
	char	int_metric;
	char	int_d_metric;		/* for faked default route */
	struct int_data {
		u_int	ipackets;	/* previous network stats */
		u_int	ierrors;
		u_int	opackets;
		u_int	oerrors;
#ifdef sgi
		u_int	odrops;
#endif
		time_t	ts;		/* timestamp on network stats */
	} int_data;
#	define MAX_AUTH_KEYS 5
	struct auth {			/* authentication info */
	    u_int16_t type;
	    u_char  key[RIP_AUTH_PW_LEN];
	    u_char  keyid;
	    time_t  start, end;
	} int_auth[MAX_AUTH_KEYS];
	/* router discovery parameters */
	int	int_rdisc_pref;		/* signed preference to advertise */
	int	int_rdisc_int;		/* MaxAdvertiseInterval */
	int	int_rdisc_cnt;
	struct timeval int_rdisc_timer;
};

/* bits in int_state */
#define IS_ALIAS	    0x0000001	/* interface alias */
#define IS_SUBNET	    0x0000002	/* interface on subnetted network */
#define	IS_REMOTE	    0x0000004	/* interface is not on this machine */
#define	IS_PASSIVE	    0x0000008	/* remote and does not do RIP */
#define IS_EXTERNAL	    0x0000010	/* handled by EGP or something */
#define IS_CHECKED	    0x0000020	/* still exists */
#define IS_ALL_HOSTS	    0x0000040	/* in INADDR_ALLHOSTS_GROUP */
#define IS_ALL_ROUTERS	    0x0000080	/* in INADDR_ALLROUTERS_GROUP */
#define IS_DISTRUST	    0x0000100	/* ignore untrusted routers */
#define IS_REDIRECT_OK	    0x0000200	/* accept ICMP redirects */
#define IS_BROKE	    0x0000400	/* seems to be broken */
#define IS_SICK		    0x0000800	/* seems to be broken */
#define IS_DUP		    0x0001000	/* has a duplicate address */
#define IS_NEED_NET_SYN	    0x0002000	/* need RS_NET_SYN route */
#define IS_NO_AG	    0x0004000	/* do not aggregate subnets */
#define IS_NO_SUPER_AG	    0x0008000	/* do not aggregate networks */
#define IS_NO_RIPV1_IN	    0x0010000	/* no RIPv1 input at all */
#define IS_NO_RIPV2_IN	    0x0020000	/* no RIPv2 input at all */
#define IS_NO_RIP_IN	(IS_NO_RIPV1_IN | IS_NO_RIPV2_IN)
#define IS_RIP_IN_OFF(s) (((s) & IS_NO_RIP_IN) == IS_NO_RIP_IN)
#define IS_NO_RIPV1_OUT	    0x0040000	/* no RIPv1 output at all */
#define IS_NO_RIPV2_OUT	    0x0080000	/* no RIPv2 output at all */
#define IS_NO_RIP_OUT	(IS_NO_RIPV1_OUT | IS_NO_RIPV2_OUT)
#define IS_NO_RIP	(IS_NO_RIP_OUT | IS_NO_RIP_IN)
#define IS_RIP_OUT_OFF(s) (((s) & IS_NO_RIP_OUT) == IS_NO_RIP_OUT)
#define IS_RIP_OFF(s)	(((s) & IS_NO_RIP) == IS_NO_RIP)
#define	IS_NO_RIP_MCAST	    0x0100000	/* broadcast RIPv2 */
#define IS_NO_ADV_IN	    0x0200000	/* do not listen to advertisements */
#define IS_NO_SOL_OUT	    0x0400000	/* send no solicitations */
#define IS_SOL_OUT	    0x0800000	/* send solicitations */
#define GROUP_IS_SOL_OUT (IS_SOL_OUT | IS_NO_SOL_OUT)
#define IS_NO_ADV_OUT	    0x1000000	/* do not advertise rdisc */
#define IS_ADV_OUT	    0x2000000	/* advertise rdisc */
#define GROUP_IS_ADV_OUT (IS_NO_ADV_OUT | IS_ADV_OUT)
#define IS_BCAST_RDISC	    0x4000000	/* broadcast instead of multicast */
#define IS_NO_RDISC	(IS_NO_ADV_IN | IS_NO_SOL_OUT | IS_NO_ADV_OUT)
#define IS_PM_RDISC	    0x8000000	/* poor-man's router discovery */

#define iff_up(f) ((f) & IFF_UP)


/* Information for aggregating routes */
#define NUM_AG_SLOTS	32
struct ag_info {
	struct ag_info *ag_fine;	/* slot with finer netmask */
	struct ag_info *ag_cors;	/* more coarse netmask */
	naddr	ag_dst_h;		/* destination in host byte order */
	naddr	ag_mask;
	naddr	ag_gate;
	naddr	ag_nhop;
	char	ag_metric;		/* metric to be advertised */
	char	ag_pref;		/* aggregate based on this */
	u_int	ag_seqno;
	u_short	ag_tag;
	u_short	ag_state;
#define	    AGS_SUPPRESS    0x001	/* combine with coarser mask */
#define	    AGS_AGGREGATE   0x002	/* synthesize combined routes */
#define	    AGS_REDUN0	    0x004	/* redundant, finer routes output */
#define	    AGS_REDUN1	    0x008
#define	    AG_IS_REDUN(state) (((state) & (AGS_REDUN0 | AGS_REDUN1)) \
				== (AGS_REDUN0 | AGS_REDUN1))
#define	    AGS_GATEWAY	    0x010	/* tell kernel RTF_GATEWAY */
#define	    AGS_IF	    0x020	/* for an interface */
#define	    AGS_RIPV2	    0x040	/* send only as RIPv2 */
#define	    AGS_FINE_GATE   0x080	/* ignore differing ag_gate when this
					 * has the finer netmask */
#define	    AGS_CORS_GATE   0x100	/* ignore differing gate when this
					 * has the coarser netmasks */
#define	    AGS_SPLIT_HZ    0x200	/* suppress for split horizon */

	/* some bits are set if they are set on either route */
#define	    AGS_AGGREGATE_EITHER (AGS_RIPV2 | AGS_GATEWAY |   \
				  AGS_SUPPRESS | AGS_CORS_GATE)
};


/* parameters for interfaces */
extern struct parm {
	struct parm *parm_next;
	char	parm_name[IF_NAME_LEN+1];
	naddr	parm_net;
	naddr	parm_mask;

	char	parm_d_metric;
	u_int	parm_int_state;
	int	parm_rdisc_pref;	/* signed IRDP preference */
	int	parm_rdisc_int;		/* IRDP advertising interval */
	struct auth parm_auth[MAX_AUTH_KEYS];
} *parms;

/* authority for internal networks */
extern struct intnet {
	struct intnet *intnet_next;
	naddr	intnet_addr;		/* network byte order */
	naddr	intnet_mask;
	char	intnet_metric;
} *intnets;

/* defined RIPv1 netmasks */
extern struct r1net {
	struct r1net *r1net_next;
	naddr	r1net_net;		/* host order */
	naddr	r1net_match;
	naddr	r1net_mask;
} *r1nets;

/* trusted routers */
extern struct tgate {
	struct tgate *tgate_next;
	naddr	tgate_addr;
#define	    MAX_TGATE_NETS 32
	struct tgate_net {
	    naddr   net;		/* host order */
	    naddr   mask;
	} tgate_nets[MAX_TGATE_NETS];
} *tgates;

enum output_type {OUT_QUERY, OUT_UNICAST, OUT_BROADCAST, OUT_MULTICAST,
	NO_OUT_MULTICAST, NO_OUT_RIPV2};

/* common output buffers */
extern struct ws_buf {
	struct rip	*buf;
	struct netinfo	*n;
	struct netinfo	*base;
	struct netinfo	*lim;
	enum output_type type;
} v12buf, v2buf;

extern pid_t	mypid;
extern naddr	myaddr;			/* main address of this system */

extern int	stopint;		/* !=0 to stop */

extern int	sock_max;
extern int	rip_sock;		/* RIP socket */
extern struct interface *rip_sock_mcast;    /* current multicast interface */
extern int	rt_sock;		/* routing socket */
extern int	rt_sock_seqno;
extern int	rdisc_sock;		/* router-discovery raw socket */

extern int	seqno;			/* sequence number for messages */
extern int	supplier;		/* process should supply updates */
extern int	supplier_set;		/* -s or -q requested */
extern int	lookforinterfaces;	/* 1=probe for new up interfaces */
extern int	ridhosts;		/* 1=reduce host routes */
extern int	mhome;			/* 1=want multi-homed host route */
extern int	advertise_mhome;	/* 1=must continue advertising it */
extern int	auth_ok;		/* 1=ignore auth if we do not care */

extern struct timeval clk;		/* system clock's idea of time */
extern struct timeval epoch;		/* system clock when started */
extern struct timeval now;		/* current idea of time */
extern time_t	now_stale;
extern time_t	now_expire;
extern time_t	now_garbage;

extern struct timeval next_bcast;	/* next general broadcast */
extern struct timeval age_timer;	/* next check of old routes */
extern struct timeval no_flash;		/* inhibit flash update until then */
extern struct timeval rdisc_timer;	/* next advert. or solicitation */
extern int rdisc_ok;			/* using solicited route */

extern struct timeval ifinit_timer;	/* time to check interfaces */

extern naddr	loopaddr;		/* our address on loopback */
extern int	tot_interfaces;		/* # of remote and local interfaces */
extern int	rip_interfaces;		/* # of interfaces doing RIP */
extern struct interface *ifnet;		/* all interfaces */
extern struct interface *remote_if;	/* remote interfaces */
extern int	have_ripv1_out;		/* have a RIPv1 interface */
extern int	have_ripv1_in;
extern int	need_flash;		/* flash update needed */
extern struct timeval need_kern;	/* need to update kernel table */
extern u_int	update_seqno;		/* a route has changed */

extern int	tracelevel, new_tracelevel;
#define MAX_TRACELEVEL 4
#define TRACEKERNEL (tracelevel >= 4)	/* log kernel changes */
#define	TRACECONTENTS (tracelevel >= 3)	/* display packet contents */
#define TRACEPACKETS (tracelevel >= 2)	/* note packets */
#define	TRACEACTIONS (tracelevel != 0)
extern FILE	*ftrace;		/* output trace file */
extern char inittracename[MAXPATHLEN+1];

extern struct radix_node_head *rhead;


#ifdef sgi
/* Fix conflicts */
#define	dup2(x,y)		BSDdup2(x,y)
#endif /* sgi */

extern void fix_sock(int, const char *);
extern void fix_select(void);
extern void rip_off(void);
extern void rip_on(struct interface *);

extern void bufinit(void);
extern int  output(enum output_type, struct sockaddr_in *,
		   struct interface *, struct rip *, int);
extern void clr_ws_buf(struct ws_buf *, struct auth *);
extern void rip_query(void);
extern void rip_bcast(int);
extern void supply(struct sockaddr_in *, struct interface *,
		   enum output_type, int, int, int);

extern void	msglog(const char *, ...) PATTRIB(1,2);
struct msg_limit {
    time_t	reuse;
    struct msg_sub {
	naddr	addr;
	time_t	until;
#   define MSG_SUBJECT_N 8
    } subs[MSG_SUBJECT_N];
};
extern void	msglim(struct msg_limit *, naddr,
		       const char *, ...) PATTRIB(3,4);
#define	LOGERR(msg) msglog(msg ": %s", strerror(errno))
extern void	logbad(int, const char *, ...) PATTRIB(2,3);
#define	BADERR(dump,msg) logbad(dump,msg ": %s", strerror(errno))
#ifdef DEBUG
#define	DBGERR(dump,msg) BADERR(dump,msg)
#else
#define	DBGERR(dump,msg) LOGERR(msg)
#endif
extern	char	*naddr_ntoa(naddr);
extern const char *saddr_ntoa(struct sockaddr *);

extern void	*rtmalloc(size_t, const char *);
extern void	timevaladd(struct timeval *, struct timeval *);
extern void	intvl_random(struct timeval *, u_long, u_long);
extern int	getnet(char *, naddr *, naddr *);
extern int	gethost(char *, naddr *);
extern void	gwkludge(void);
extern const char *parse_parms(char *, int);
extern const char *check_parms(struct parm *);
extern void	get_parms(struct interface *);

extern void	lastlog(void);
extern void	trace_close(int);
extern void	set_tracefile(const char *, const char *, int);
extern void	tracelevel_msg(const char *, int);
extern void	trace_off(const char*, ...) PATTRIB(1,2);
extern void	set_tracelevel(void);
extern void	trace_flush(void);
extern void	trace_misc(const char *, ...) PATTRIB(1,2);
extern void	trace_act(const char *, ...) PATTRIB(1,2);
extern void	trace_pkt(const char *, ...) PATTRIB(1,2);
extern void	trace_add_del(const char *, struct rt_entry *);
extern void	trace_change(struct rt_entry *, u_int, struct rt_spare *,
			     const char *);
extern void	trace_if(const char *, struct interface *);
extern void	trace_upslot(struct rt_entry *, struct rt_spare *,
			     struct rt_spare *);
extern void	trace_rip(const char*, const char*, struct sockaddr_in *,
			  struct interface *, struct rip *, int);
extern char	*addrname(naddr, naddr, int);
extern char	*rtname(naddr, naddr, naddr);

extern void	rdisc_age(naddr);
extern void	set_rdisc_mg(struct interface *, int);
extern void	set_supplier(void);
extern void	if_bad_rdisc(struct interface *);
extern void	if_ok_rdisc(struct interface *);
extern void	read_rip(int, struct interface *);
extern void	read_rt(void);
extern void	read_d(void);
extern void	rdisc_adv(void);
extern void	rdisc_sol(void);

extern void	sigalrm(int);
extern void	sigterm(int);

extern void	sigtrace_on(int);
extern void	sigtrace_off(int);

extern void	flush_kern(void);
extern void	age(naddr);

extern void	ag_flush(naddr, naddr, void (*)(struct ag_info *));
extern void	ag_check(naddr, naddr, naddr, naddr, char, char, u_int,
			 u_short, u_short, void (*)(struct ag_info *));
extern void	del_static(naddr, naddr, naddr, int);
extern void	del_redirects(naddr, time_t);
extern struct rt_entry *rtget(naddr, naddr);
extern struct rt_entry *rtfind(naddr);
extern void	rtinit(void);
extern void	rtadd(naddr, naddr, u_int, struct rt_spare *);
extern void	rtchange(struct rt_entry *, u_int, struct rt_spare *, char *);
extern void	rtdelete(struct rt_entry *);
extern void	rts_delete(struct rt_entry *, struct rt_spare *);
extern void	rtbad_sub(struct rt_entry *);
extern void	rtswitch(struct rt_entry *, struct rt_spare *);
extern void	rtbad(struct rt_entry *);

#define S_ADDR(x)	(((struct sockaddr_in *)(x))->sin_addr.s_addr)
#define INFO_DST(I)	((I)->rti_info[RTAX_DST])
#define INFO_GATE(I)	((I)->rti_info[RTAX_GATEWAY])
#define INFO_MASK(I)	((I)->rti_info[RTAX_NETMASK])
#define INFO_IFA(I)	((I)->rti_info[RTAX_IFA])
#define INFO_IFP(I)	((I)->rti_info[RTAX_IFP])
#define INFO_AUTHOR(I)	((I)->rti_info[RTAX_AUTHOR])
#define INFO_BRD(I)	((I)->rti_info[RTAX_BRD])
void rt_xaddrs(struct rt_addrinfo *, struct sockaddr *, struct sockaddr *,
	       int);

extern naddr	std_mask(naddr);
extern naddr	ripv1_mask_net(naddr, struct interface *);
extern naddr	ripv1_mask_host(naddr,struct interface *);
#define		on_net(a,net,mask) (((ntohl(a) ^ (net)) & (mask)) == 0)
extern int	check_dst(naddr);
extern struct interface *check_dup(naddr, naddr, naddr, int);
extern int	check_remote(struct interface *);
extern int	addrouteforif(struct interface *);
extern void	ifinit(void);
extern int	walk_bad(struct radix_node *, struct walkarg *);
extern int	if_ok(struct interface *, const char *);
extern void	if_sick(struct interface *);
extern void	if_bad(struct interface *);
extern void	if_link(struct interface *);
extern struct interface *ifwithaddr(naddr, int, int);
extern struct interface *ifwithname(char *, naddr);
extern struct interface *ifwithindex(u_short, int);
extern struct interface *iflookup(naddr);

extern struct auth *find_auth(struct interface *);
extern void end_md5_auth(struct ws_buf *, struct auth *);

#define MD5_DIGEST_LEN 16
typedef struct {
	u_int32_t state[4];		/* state (ABCD) */
	u_int32_t count[2];		/* # of bits, modulo 2^64 (LSB 1st) */
	unsigned char buffer[64];	/* input buffer */
} MD5_CTX;
extern void MD5Init(MD5_CTX*);
extern void MD5Update(MD5_CTX*, u_char*, u_int);
extern void MD5Final(u_char[MD5_DIGEST_LEN], MD5_CTX*);
OpenPOWER on IntegriCloud