summaryrefslogtreecommitdiff
path: root/source3/wrepld/process.c
blob: 149ff3cd35a3546781711579284689e5f89cb165 (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
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   process incoming packets - main loop
   Copyright (C) Jean François Micouleau      1998-2002.
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "wins_repl.h"

extern fd_set *listen_set;
extern int listen_number;
extern int *sock_array;

WINS_OWNER global_wins_table[64][64];
int partner_count;

TALLOC_CTX *mem_ctx;

#define WINS_LIST "wins.tdb"
#define INFO_VERSION	"INFO/version"
#define INFO_COUNT	"INFO/num_entries"
#define INFO_ID_HIGH	"INFO/id_high"
#define INFO_ID_LOW	"INFO/id_low"
#define ENTRY_PREFIX 	"ENTRY/"


/*******************************************************************
fill the header of a reply.
********************************************************************/
static void fill_header(GENERIC_PACKET *g, int opcode, int ctx, int mess)
{
	if (g==NULL)
		return;

	g->header.opcode=opcode;
	g->header.assoc_ctx=ctx;
	g->header.mess_type=mess;
}

/*******************************************************************
dump the global table, that's a debug code.
********************************************************************/
static void dump_global_table(void)
{
	int i,j;
	
	for (i=0;i<partner_count;i++) {
		DEBUG(0,("\n%d ", i));
		for (j=0; global_wins_table[i][j].address.s_addr!=0; j++)
			DEBUG(0,("%s:%d \t", inet_ntoa(global_wins_table[i][j].address),
				(int)global_wins_table[i][j].max_version));
	}
	DEBUG(0,("\n"));
}

/*******************************************************************
start association
********************************************************************/
static void start_assoc_process(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	/*
	 * add this request to our current wins partners list
	 * this list is used to know with who we are in contact
	 *
	 */
	r->sa_rp.assoc_ctx=time(NULL);
	fill_header(r, OPCODE_NON_NBT, q->sa_rq.assoc_ctx, MESSAGE_TYPE_START_ASSOC_REPLY);

	/* reply we are a NT4 server */
	
	/* w2K is min=2, maj=5 */
	
	r->sa_rp.min_ver=1;
	r->sa_rp.maj_ver=1;

	add_partner(r->sa_rp.assoc_ctx, q->sa_rq.assoc_ctx, False, False);
}

/*******************************************************************
start association reply
********************************************************************/
static void start_assoc_reply(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	int i;

	/* check if we have already registered this client */
	if (!check_partner(q->header.assoc_ctx)) {
		DEBUG(0,("start_assoc_reply: unknown client\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	if (!update_server_partner(q->header.assoc_ctx, q->sa_rp.assoc_ctx)) {
		DEBUG(0,("start_assoc_reply: can't update server ctx\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	/* if pull, request map table */	
	if (check_pull_partner(q->header.assoc_ctx)) {
		fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);

		r->rep.msg_type=MESSAGE_REP_ADD_VERSION_REQUEST;
		DEBUG(0,("start_assoc_reply: requesting map table\n"));

		return;
	}

	/* if push, send our table */
	if (check_push_partner(q->header.assoc_ctx)) {
		fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);
		r->rep.msg_type=MESSAGE_REP_UPDATE_NOTIFY_REQUEST;
		r->rep.un_rq.partner_count=partner_count;
		
		r->rep.un_rq.wins_owner=(WINS_OWNER *)talloc(mem_ctx, partner_count*sizeof(WINS_OWNER));
		if (r->rep.un_rq.wins_owner==NULL) {
			DEBUG(0,("start_assoc_reply: can't alloc memory\n"));
			stop_packet(q, r, STOP_REASON_USER_REASON);
			return;
		}

		for (i=0; i<partner_count; i++)
			r->rep.un_rq.wins_owner[i]=global_wins_table[0][i];
		
		DEBUG(0,("start_assoc_reply: sending update table\n"));
		return;
	}
	
	/* neither push/pull, stop */
	/* we should not come here */
	DEBUG(0,("we have a partner which is neither push nor pull !\n"));
	stop_packet(q, r, STOP_REASON_USER_REASON);
}

/****************************************************************************
initialise and fill the in-memory partner table.
****************************************************************************/
int init_wins_partner_table(void)
{
	int i=1,j=0,k;
	char **partner = lp_list_make(lp_wins_partners());

	DEBUG(0, ("init_wins_partner_table: partners: %s\n", lp_wins_partners()));

	global_wins_table[0][0].address=*iface_n_ip(0);
	global_wins_table[0][0].max_version=0;
	global_wins_table[0][0].min_version=0;
	global_wins_table[0][0].type=0;

	while (partner[j]!=NULL) {
		DEBUG(0,("init_wins_partner_table, adding partner: %s\n", partner[j]));
		
		global_wins_table[0][i].address=*interpret_addr2(partner[j]);
		global_wins_table[0][i].max_version=0;
		global_wins_table[0][i].min_version=0;
		global_wins_table[0][i].type=0;
		global_wins_table[0][i].last_pull=0;
		global_wins_table[0][i].last_push=0;

		i++;
		j++;
	}
	
	for (k=1; k<i;k++)
		for (j=0; j<i; j++)
			global_wins_table[k][j]=global_wins_table[0][j];
	
	lp_list_free (&partner);
	
	return i;
}

/****************************************************************************
read the last ID from the wins tdb file.
****************************************************************************/
static void get_our_last_id(WINS_OWNER *wins_owner)
{
	TDB_CONTEXT *tdb;

	tdb = tdb_open_log(lock_path(WINS_LIST), 0, TDB_DEFAULT, O_RDONLY, 0600);
	if (!tdb) {
		DEBUG(2,("get_our_last_id: Can't open wins database file %s. Error was %s\n", WINS_LIST, strerror(errno) ));
		return;
	}
	
	wins_owner->max_version=((SMB_BIG_UINT)tdb_fetch_int(tdb, INFO_ID_HIGH))<<32 | 
				 (SMB_BIG_UINT)tdb_fetch_int(tdb, INFO_ID_LOW);

	tdb_close(tdb);
}

/****************************************************************************
send the list of wins server we know.
****************************************************************************/
static void send_version_number_map_table(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	int i;
	int s_ctx=get_server_assoc(q->header.assoc_ctx);

	if (s_ctx==0) {
		DEBUG(0, ("send_entry_reply: request for a partner not in our table\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	/*
	 * return an array of wins servers, we are partner with.
	 * each entry contains the IP address and the version info
	 * version: ID of the last entry we've got
	 */

	/* the first wins server must be self */

	/*
	 * get our last ID from the wins database
	 * it can have been updated since last read
	 * as nmbd got registration/release.
	 */ 
	get_our_last_id(&global_wins_table[0][0]);

	r->rep.avmt_rep.wins_owner=(WINS_OWNER *)talloc(mem_ctx, partner_count*sizeof(WINS_OWNER));
	if (r->rep.avmt_rep.wins_owner==NULL) {
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}
	
	DEBUG(0,("send_version_number_map_table: partner_count: %d\n", partner_count));

	for (i=0; i<partner_count; i++) {
		DEBUG(0,("send_version_number_map_table, partner: %d -> %s, \n", i, inet_ntoa(global_wins_table[0][i].address)));
		r->rep.avmt_rep.wins_owner[i]=global_wins_table[0][i];
	}
	
	r->rep.msg_type=1;
	r->rep.avmt_rep.partner_count=partner_count;
	r->rep.avmt_rep.initiating_wins_server.s_addr=0; /* blatant lie, NT4/w2K do the same ! */
	fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);
}

/****************************************************************************
for a given partner, ask it to send entries we don't have.
****************************************************************************/
static BOOL check_partners_and_send_entries(GENERIC_PACKET *q, GENERIC_PACKET *r, int partner)
{
	int server;
	int other;
	SMB_BIG_UINT temp;
	SMB_BIG_UINT current;


	/*
	 * we check if our partner has more records than us.
	 * we need to check more than our direct partners as
	 * we can have this case:
	 * us: A, partners: B,C, indirect partner: D
	 * A<->B, A<->C, B<->D, C<->D
	 *
	 * So if we're talking to B, we need to check if between
	 * B and C, which one have more records about D.
	 * and also check if we don't already have the records.
	 */


	 /* check all servers even indirect */
	 for (server=1; global_wins_table[0][server].address.s_addr!=0; server++) {
		current = global_wins_table[partner][server].max_version;
		
		temp=0;
		
		for (other=1; other<partner_count; other++) {
			/* skip the partner itself */
			if (other==partner)
				continue;

			if (global_wins_table[other][server].max_version > temp)
				temp=global_wins_table[other][server].max_version;
		}
		
		if (current >= temp && current > global_wins_table[0][server].max_version) {
			/* 
			 * it has more records than every body else and more than us,
			 * ask it the difference between what we have and what it has
			 */
			fill_header(r, OPCODE_NON_NBT, get_server_assoc(q->header.assoc_ctx), MESSAGE_TYPE_REPLICATE);

			r->rep.msg_type=MESSAGE_REP_SEND_ENTRIES_REQUEST;
			r->rep.se_rq.wins_owner.address=global_wins_table[partner][server].address;
			
			r->rep.se_rq.wins_owner.max_version=global_wins_table[partner][server].max_version;
			r->rep.se_rq.wins_owner.min_version=global_wins_table[0][server].max_version;
			r->rep.se_rq.wins_owner.type=0;
			
			write_server_assoc_table(q->header.assoc_ctx, global_wins_table[0][partner].address, global_wins_table[partner][server].address);
			
			/*
			 * and we update our version for this server
			 * as we can't use the IDs returned in the send_entries function
			 * the max ID can be larger than the largest ID returned
			 */
			
			global_wins_table[0][server].max_version=global_wins_table[partner][server].max_version;

			return True;
		}
	}
	return False;
}
	
/****************************************************************************
receive the list of wins server we know.
****************************************************************************/
static void receive_version_number_map_table(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	fstring peer;
	struct in_addr addr;
	int i,j,k,l;
	int s_ctx=get_server_assoc(q->header.assoc_ctx);

	if (s_ctx==0) {
		DEBUG(0, ("receive_version_number_map_table: request for a partner not in our table\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	fstrcpy(peer,get_socket_addr(q->fd));
	addr=*interpret_addr2(peer);

	get_our_last_id(&global_wins_table[0][0]);
	
	DEBUG(0,("receive_version_number_map_table: received a map of %d server from: %s\n", 
	          q->rep.avmt_rep.partner_count ,inet_ntoa(q->rep.avmt_rep.initiating_wins_server)));
	DEBUG(0,("real peer is: %s\n", peer));

	for (i=0; global_wins_table[0][i].address.s_addr!=addr.s_addr && i<partner_count;i++)
		;

	if (i==partner_count) {
		DEBUG(0,("receive_version_number_map_table: unknown partner: %s\n", peer));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	for (j=0; j<q->rep.avmt_rep.partner_count;j++) {
		/*
		 * search if we already have this entry or if it's a new one
		 * it can be a new one in case of propagation
		 */
		for (k=0; global_wins_table[0][k].address.s_addr!=0 && 
			  global_wins_table[0][k].address.s_addr!=q->rep.avmt_rep.wins_owner[j].address.s_addr; k++);

		global_wins_table[i][k].address.s_addr=q->rep.avmt_rep.wins_owner[j].address.s_addr;
		global_wins_table[i][k].max_version=q->rep.avmt_rep.wins_owner[j].max_version;
		global_wins_table[i][k].min_version=q->rep.avmt_rep.wins_owner[j].min_version;
		global_wins_table[i][k].type=q->rep.avmt_rep.wins_owner[j].type;
		
		/*
		 * in case it's a new one, rewrite the address for all the partner
		 * to reserve the slot.
		 */

		for(l=0; l<partner_count; l++)
			global_wins_table[l][k].address.s_addr=q->rep.avmt_rep.wins_owner[j].address.s_addr;
	}

	dump_global_table();

	/*
	 * if this server have newer records than what we have
	 * for several wins servers, we need to ask it.
	 * Alas a send entry request is only on one server.
	 * So in the send entry reply, we'll ask for the next server is required.
	 */

	if (check_partners_and_send_entries(q, r, i))
		return;

	/* it doesn't have more entries than us */
	stop_packet(q, r, STOP_REASON_USER_REASON);
}

/****************************************************************************
add an entry to the wins list we'll send.
****************************************************************************/
static BOOL add_record_to_winsname(WINS_NAME **wins_name, int *max_names, char *name, int type, int wins_flags, int id, struct in_addr *ip_list, int num_ips)
{
	WINS_NAME *temp_list;
	int i;
	int current=*max_names;

	temp_list=talloc_realloc(mem_ctx, *wins_name, (current+1)*sizeof(WINS_NAME));
	if (temp_list==NULL)
		return False;

	temp_list[current].name_len=0x11;
	
	safe_strcpy(temp_list[current].name, name, 15);

	temp_list[current].type=type;
	temp_list[current].empty=0;

	temp_list[current].name_flag=wins_flags;

	if ( (wins_flags&0x03) == 1 || (wins_flags&0x03)==2)
		temp_list[current].group_flag=0x01000000;
	else
		temp_list[current].group_flag=0x00000000;
	
	temp_list[current].id=id;
	
	temp_list[current].owner.s_addr=ip_list[0].s_addr;

	if (temp_list[current].name_flag & 2) {
		temp_list[current].num_ip=num_ips;
		temp_list[current].others=(struct in_addr *)talloc(mem_ctx, sizeof(struct in_addr)*num_ips);
		if (temp_list[current].others==NULL)
			return False;
	
		for (i=0; i<num_ips; i++)
			temp_list[current].others[i].s_addr=ip_list[i].s_addr;

	} else 
		temp_list[current].num_ip=1;

	temp_list[current].foo=0xffffffff;

	*wins_name=temp_list;
	
	return True;
}

/****************************************************************************
send the list of name we have.
****************************************************************************/
static void send_entry_request(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	int max_names=0;
	int i;
	time_t time_now = time(NULL);
	WINS_OWNER *wins_owner;
	TDB_CONTEXT *tdb;
	TDB_DATA kbuf, dbuf, newkey;
	int s_ctx=get_server_assoc(q->header.assoc_ctx);
	int num_interfaces = iface_count();

	if (s_ctx==0) {
		DEBUG(0, ("send_entry_request: request for a partner not in our table\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}


	wins_owner=&q->rep.se_rq.wins_owner;
	r->rep.se_rp.wins_name=NULL;

	DEBUG(0,("send_entry_request: we have been asked to send the list of wins records\n"));
	DEBUGADD(0,("owned by: %s and between min: %d and max: %d\n", inet_ntoa(wins_owner->address),
		    (int)wins_owner->min_version, (int)wins_owner->max_version));

	/*
	 * if we are asked to send records owned by us
	 * we overwrite the wins ip with 0.0.0.0
	 * to make it easy in case of multihomed
	 */

	for (i=0; i<num_interfaces; i++)
		if (ip_equal(wins_owner->address, *iface_n_ip(i))) {
			wins_owner->address=*interpret_addr2("0.0.0.0");
			break;
		}


	tdb = tdb_open_log(lock_path(WINS_LIST), 0, TDB_DEFAULT, O_RDONLY, 0600);
	if (!tdb) {
		DEBUG(2,("send_entry_request: Can't open wins database file %s. Error was %s\n", WINS_LIST, strerror(errno) ));
		return;
	}

	for (kbuf = tdb_firstkey(tdb); 
	     kbuf.dptr; 
	     newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
		pstring name_type, name, ip_str;
		char *p;
		int type = 0;
		int nb_flags;
		int ttl;
		unsigned int num_ips;
		int low, high;
		SMB_BIG_UINT version;
		struct in_addr wins_ip;
		struct in_addr *ip_list;
		int wins_flags;
		int len;

		if (strncmp(kbuf.dptr, ENTRY_PREFIX, strlen(ENTRY_PREFIX)) != 0)
			continue;
		
		
		dbuf = tdb_fetch(tdb, kbuf);
		if (!dbuf.dptr)
			continue;

		fstrcpy(name_type, kbuf.dptr+strlen(ENTRY_PREFIX));
		pstrcpy(name, name_type);

		if((p = strchr(name,'#')) != NULL) {
			*p = 0;
			sscanf(p+1,"%x",&type);
		}

		len = tdb_unpack(dbuf.dptr, dbuf.dsize, "dddfddd",
				&nb_flags,
				&high,
				&low,
				ip_str,
				&ttl, 
				&num_ips,
				&wins_flags);

		wins_ip=*interpret_addr2(ip_str);

 		/* Allocate the space for the ip_list. */
		if((ip_list = (struct in_addr *)talloc(mem_ctx,  num_ips * sizeof(struct in_addr))) == NULL) {
			DEBUG(0,("initialise_wins: talloc fail !\n"));
			return;
		}

		for (i = 0; i < num_ips; i++) {
			len += tdb_unpack(dbuf.dptr+len, dbuf.dsize-len, "f", ip_str);
			ip_list[i] = *interpret_addr2(ip_str);
		}

		/* add all entries that have 60 seconds or more to live */
		if ((ttl - 60) > time_now || ttl == PERMANENT_TTL) {
			if(ttl != PERMANENT_TTL)
				ttl -= time_now;
    
			DEBUG( 4, ("send_entry_request: add name: %s#%02x ttl = %d first IP %s flags = %2x\n",
			    name, type, ttl, inet_ntoa(ip_list[0]), nb_flags));

			/* add the record to the list to send */
			version=((SMB_BIG_UINT)high)<<32 | low;
			
			if (wins_owner->min_version<=version && wins_owner->max_version>=version &&
			    wins_owner->address.s_addr==wins_ip.s_addr) {
				if(!add_record_to_winsname(&r->rep.se_rp.wins_name, &max_names, name, type, wins_flags, version, ip_list, num_ips))
					return;
				max_names++;
			}

		} else {
			DEBUG(4, ("send_entry_request: not adding name (ttl problem) %s#%02x ttl = %d first IP %s flags = %2x\n",
				  name, type, ttl, inet_ntoa(ip_list[0]), nb_flags));
		}
	}
    
	tdb_close(tdb);

	DEBUG(0,("send_entry_request, sending %d records\n", max_names));
	fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);
	r->rep.msg_type=MESSAGE_REP_SEND_ENTRIES_REPLY; /* reply */
	r->rep.se_rp.max_names=max_names;
}


/****************************************************************************
.
****************************************************************************/
static void update_notify_request(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	int i,j,k,l;
	UPDATE_NOTIFY_REQUEST *u;
	int s_ctx=get_server_assoc(q->header.assoc_ctx);
	
	if (s_ctx==0) {
		DEBUG(0, ("send_entry_reply: request for a partner not in our table\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	u=&q->rep.un_rq;

	/* check if we already have the range of records */

	DEBUG(0,("update_notify_request: wins server: %s offered this list of %d records:\n",
		inet_ntoa(u->initiating_wins_server), u->partner_count));

	get_our_last_id(&global_wins_table[0][0]);

	for (i=0; i<partner_count; i++) {
		if (global_wins_table[0][i].address.s_addr==u->initiating_wins_server.s_addr) {
			DEBUG(0,("update_notify_request: found initiator at index %d\n", i));
			break;
		}
	}

	/*
	 * some explanation is required, before someone say it's crap.
	 *
	 * let's take an example, we have 2 wins partners, we already now
	 * that our max id is 10, partner 1 ID is 20 and partner 2 ID is 30
	 * the array looks like:
	 *
	 * 	0	1	2
	 * 0	10	20	30  
	 * 1
	 * 2
	 *
	 * we receive an update from partner 2 saying he has: 1:15, 2:40, 3:50
	 * we must enlarge the array to add partner 3, it will look like:
	 *
	 * 	0	1	2	3
	 * 0	10	20	30
	 * 1
	 * 2		15	40	50
	 *
	 * now we know, we should pull from partner 2, the records 30->40 of 2 and 0->50 of 3.
	 * once the pull will be over, our table will look like:
	 *
	 * 	0	1	2	3
	 * 0	10	20	40	50
	 * 1
	 * 2		15	40	50
	 *
	 *
	 */

	for (j=0; j<u->partner_count;j++) {
		/*
		 * search if we already have this entry or if it's a new one
		 * it can be a new one in case of propagation
		 */

		for (k=0; global_wins_table[0][k].address.s_addr!=0 && 
			  global_wins_table[0][k].address.s_addr!=u->wins_owner[j].address.s_addr; k++);

		global_wins_table[i][k].address.s_addr=u->wins_owner[j].address.s_addr;
		global_wins_table[i][k].max_version=u->wins_owner[j].max_version;
		global_wins_table[i][k].min_version=u->wins_owner[j].min_version;
		global_wins_table[i][k].type=u->wins_owner[j].type;
		
		/*
		 * in case it's a new one, rewrite the address for all the partner
		 * to reserve the slot.
		 */

		for(l=0; l<partner_count; l++)
			global_wins_table[l][k].address.s_addr=u->wins_owner[j].address.s_addr;
	}

	dump_global_table();

	stop_packet(q, r, STOP_REASON_USER_REASON);
}

/****************************************************************************
.
****************************************************************************/
static void send_entry_reply(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	int i,j,k;
	struct in_addr partner, server;
	pid_t pid;
	int s_ctx=get_server_assoc(q->header.assoc_ctx);
	WINS_RECORD record;
	
	if (s_ctx==0) {
		DEBUG(0, ("send_entry_reply: request for a partner not in our table\n"));
		stop_packet(q, r, STOP_REASON_USER_REASON);
		return;
	}

	DEBUG(0,("send_entry_reply:got %d new records\n", q->rep.se_rp.max_names));

	/* we got records from a wins partner but that can be from another wins server */
	/* hopefully we track that */

	/* and the only doc available from MS is wrong ! */

	get_server_assoc_table(q->header.assoc_ctx, &partner, &server);

	for (j=0; global_wins_table[0][j].address.s_addr!=0; j++) {
		if (global_wins_table[0][j].address.s_addr==server.s_addr) {
			DEBUG(0,("send_entry_reply: found server at index %d\n", j));
			break;
		}
	}

	pid = pidfile_pid("nmbd");
	if (pid == 0) {
		DEBUG(0,("send_entry_reply: Can't find pid for nmbd\n"));
		return;
	}

	for (k=0; k<q->rep.se_rp.max_names; k++) {
		DEBUG(0,("send_entry_reply: %s<%02x> %d\n", q->rep.se_rp.wins_name[k].name, q->rep.se_rp.wins_name[k].type,
		         (int)q->rep.se_rp.wins_name[k].id));

		safe_strcpy(record.name, q->rep.se_rp.wins_name[k].name, 16);
		record.type=q->rep.se_rp.wins_name[k].type;
		record.id=q->rep.se_rp.wins_name[k].id;
		record.wins_flags=q->rep.se_rp.wins_name[k].name_flag&0x00ff;
		record.num_ips=q->rep.se_rp.wins_name[k].num_ip;

		record.wins_ip.s_addr=server.s_addr;

		if (record.num_ips==1)
			record.ip[0]=q->rep.se_rp.wins_name[k].owner;
		else
			for (i=0; i<record.num_ips; i++)
				record.ip[i]=q->rep.se_rp.wins_name[k].others[i];

		record.nb_flags=0;

		if (record.wins_flags&WINS_NGROUP || record.wins_flags&WINS_SGROUP)
			record.nb_flags|=NB_GROUP;
		
		if (record.wins_flags&WINS_ACTIVE)
			record.nb_flags|=NB_ACTIVE;
		
		record.nb_flags|=record.wins_flags&WINS_HNODE;
		
		message_send_pid(pid, MSG_WINS_NEW_ENTRY, &record, sizeof(record), False);

	}

	dump_global_table();

	/*
	 * we got some entries, 
	 * ask the partner to send us the map table again
	 * to get the other servers entries.
	 *
	 * we're getting the map table 1 time more than really
	 * required. We could remove that call, but that
	 * would complexify the code. I prefer this trade-of. 
	 */
	fill_header(r, OPCODE_NON_NBT, s_ctx, MESSAGE_TYPE_REPLICATE);

	r->rep.msg_type=MESSAGE_REP_ADD_VERSION_REQUEST;
}

/****************************************************************************
decode the replication message and reply.
****************************************************************************/
static void replicate(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	switch (q->rep.msg_type) {
		case 0:
			/* add version number map table request */
			send_version_number_map_table(q, r);
			break;
		case 1:
			receive_version_number_map_table(q, r);
			break;
		case 2:
			/* send entry request */
			send_entry_request(q, r);
			break;
		case 3:
			/* send entry reply */
			send_entry_reply(q, r);
			break;
		case 4:
			/* update notification request */
			update_notify_request(q, r);
			break;
	}
}

/****************************************************************************
do a switch on the message type, and return the response size
****************************************************************************/
static BOOL switch_message(GENERIC_PACKET *q, GENERIC_PACKET *r)
{
	switch (q->header.mess_type) {
		case 0:
			/* Start association type */			
			start_assoc_process(q, r);
			return True;
			break;
		case 1:
			/* start association reply */
			start_assoc_reply(q, r);
			return True;
			break;
		case 2:
			/* stop association message */
			/*
			 * remove the partner from the list and 
			 * reply false to NOT send a packet
			 */
			remove_partner(q->header.assoc_ctx);
			return False;
			break;
		case 3:
			/* replication message */
			replicate(q, r);
			return True;
			break;
	}

	return False;
}


/****************************************************************************
  construct a reply to the incoming packet
****************************************************************************/
void construct_reply(struct wins_packet_struct *p)
{
	GENERIC_PACKET r;
	struct BUFFER buffer;

	buffer.buffer=NULL;
	buffer.offset=0;
	buffer.length=0;

	DEBUG(0,("dump: received packet\n"));
	dump_generic_packet(p->packet);

	/* Verify if the request we got is from a listed partner */
	if (!check_partner(p->packet->header.assoc_ctx)) {
		fstring peer;
		struct in_addr addr;
		int i;
		fstrcpy(peer,get_socket_addr(p->fd));
		addr=*interpret_addr2(peer);

		for (i=1; i<partner_count; i++)
			if (ip_equal(addr, global_wins_table[0][i].address))
				break;

		if (i==partner_count) {
			DEBUG(0,("construct_reply: got a request from a non peer machine: %s\n", peer));
			stop_packet(p->packet, &r, STOP_REASON_AUTH_FAILED);
			p->stop_packet=True;
			encode_generic_packet(&buffer, &r);
			if (!send_smb(p->fd, buffer.buffer))
				exit_server("process_smb: send_smb failed.");
			return;
		}
	}

	if (switch_message(p->packet, &r)) {
		encode_generic_packet(&buffer, &r);
		DEBUG(0,("dump: sending packet\n"));
		dump_generic_packet(&r);

		if(buffer.offset > 0) {
			if (!send_smb(p->fd, buffer.buffer))
				exit_server("process_smb: send_smb failed.");
		}
	}

	/* if we got a stop assoc or if we send a stop assoc, close the fd after */
	if (p->packet->header.mess_type==MESSAGE_TYPE_STOP_ASSOC || 
	    r.header.mess_type==MESSAGE_TYPE_STOP_ASSOC)
		p->stop_packet=True;
}

/****************************************************************************
  contact periodically our wins partner to do a pull replication
****************************************************************************/
void run_pull_replication(time_t t)
{
	/* we pull every 30 minutes to query about new records*/
	int i, s;
	struct BUFFER buffer;
	GENERIC_PACKET p;

	buffer.buffer=NULL;
	buffer.offset=0;
	buffer.length=0;

	for (i=1; i<partner_count; i++) {
		if (global_wins_table[0][i].last_pull < t) {
			global_wins_table[0][i].last_pull=t+30*60; /* next in 30 minutes */
			
			/* contact the wins server */
			p.header.mess_type=MESSAGE_TYPE_START_ASSOC_REQUEST;
			p.header.opcode=OPCODE_NON_NBT;
			p.header.assoc_ctx=0;
			p.sa_rq.assoc_ctx=(int)t;
			p.sa_rq.min_ver=1;
			p.sa_rq.maj_ver=1;
			
			DEBUG(3,("run_pull_replication: contacting wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
			encode_generic_packet(&buffer, &p);
			dump_generic_packet(&p);

			/* send the packet to the server and add the descriptor to receive answers */
			s=open_socket_out(SOCK_STREAM, &global_wins_table[0][i].address, 42, LONG_CONNECT_TIMEOUT);
			if (s==-1) {
				DEBUG(0,("run_pull_replication: can't contact wins server %s.\n", inet_ntoa(global_wins_table[0][i].address)));
				return;
			}
			
			if(buffer.offset > 0) {
				if (!send_smb(s, buffer.buffer))
					exit_server("run_pull_replication: send_smb failed.");
			}
			
			add_fd_to_sock_array(s);
			FD_SET(s, listen_set);

			/* add ourself as a client */
			add_partner((int)t, 0, True, False);
		}
	}
}

/****************************************************************************
  contact periodically our wins partner to do a push replication
****************************************************************************/
void run_push_replication(time_t t)
{
	/* we push every 30 minutes or 25 new entries */

}