source: trunk/server/source3/include/nameserv.h@ 533

Last change on this file since 533 was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 19.8 KB
Line 
1#ifndef _NAMESERV_H_
2#define _NAMESERV_H_
3/*
4 Unix SMB/CIFS implementation.
5 NBT netbios header - version 2
6 Copyright (C) Andrew Tridgell 1994-1998
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20
21*/
22
23#define INFO_VERSION "INFO/version"
24#define INFO_COUNT "INFO/num_entries"
25#define INFO_ID_HIGH "INFO/id_high"
26#define INFO_ID_LOW "INFO/id_low"
27#define ENTRY_PREFIX "ENTRY/"
28
29#define PERMANENT_TTL 0
30
31/* NTAS uses 2, NT uses 1, WfWg uses 0 */
32#define MAINTAIN_LIST 2
33#define ELECTION_VERSION 1
34
35#define MAX_DGRAM_SIZE (576) /* tcp/ip datagram limit is 576 bytes */
36#define MIN_DGRAM_SIZE 12
37
38/*********************************************************
39 Types of reply packet.
40**********************************************************/
41
42enum netbios_reply_type_code { NMB_QUERY, NMB_STATUS, NMB_REG, NMB_REG_REFRESH,
43 NMB_REL, NMB_WAIT_ACK, NMB_MULTIHOMED_REG,
44 WINS_REG, WINS_QUERY };
45
46/* From rfc1002, 4.2.1.2 */
47/* Question types. */
48#define QUESTION_TYPE_NB_QUERY 0x20
49#define QUESTION_TYPE_NB_STATUS 0x21
50
51/* Question class */
52#define QUESTION_CLASS_IN 0x1
53
54/* Opcode definitions */
55#define NMB_NAME_QUERY_OPCODE 0x0
56#define NMB_NAME_REG_OPCODE 0x05 /* see rfc1002.txt 4.2.2,3,5,6,7,8 */
57#define NMB_NAME_RELEASE_OPCODE 0x06 /* see rfc1002.txt 4.2.9,10,11 */
58#define NMB_WACK_OPCODE 0x07 /* see rfc1002.txt 4.2.16 */
59/* Ambiguity in rfc1002 about which of these is correct. */
60/* WinNT uses 8 by default but can be made to use 9. */
61#define NMB_NAME_REFRESH_OPCODE_8 0x08 /* see rfc1002.txt 4.2.4 */
62#define NMB_NAME_REFRESH_OPCODE_9 0x09 /* see rfc1002.txt 4.2.4 */
63#define NMB_NAME_MULTIHOMED_REG_OPCODE 0x0F /* Invented by Microsoft. */
64
65/* XXXX what about all the other types?? 0x1, 0x2, 0x3, 0x4, 0x8? */
66
67/* Resource record types. rfc1002 4.2.1.3 */
68#define RR_TYPE_A 0x1
69#define RR_TYPE_NS 0x2
70#define RR_TYPE_NULL 0xA
71#define RR_TYPE_NB 0x20
72#define RR_TYPE_NBSTAT 0x21
73
74/* Resource record class. */
75#define RR_CLASS_IN 0x1
76
77/* NetBIOS flags */
78#define NB_GROUP 0x80
79#define NB_PERM 0x02
80#define NB_ACTIVE 0x04
81#define NB_CONFL 0x08
82#define NB_DEREG 0x10
83#define NB_BFLAG 0x00 /* Broadcast node type. */
84#define NB_PFLAG 0x20 /* Point-to-point node type. */
85#define NB_MFLAG 0x40 /* Mixed bcast & p-p node type. */
86#define NB_HFLAG 0x60 /* Microsoft 'hybrid' node type. */
87#define NB_NODETYPEMASK 0x60
88/* Mask applied to outgoing NetBIOS flags. */
89#define NB_FLGMSK 0xE0
90
91/* The wins flags. Looks like the nbflags ! */
92#define WINS_UNIQUE 0x00 /* Unique record */
93#define WINS_NGROUP 0x01 /* Normal Group eg: 1B */
94#define WINS_SGROUP 0x02 /* Special Group eg: 1C */
95#define WINS_MHOMED 0x03 /* MultiHomed */
96
97#define WINS_ACTIVE 0x00 /* active record */
98#define WINS_RELEASED 0x04 /* released record */
99#define WINS_TOMBSTONED 0x08 /* tombstoned record */
100#define WINS_DELETED 0x0C /* deleted record */
101
102#define WINS_STATE_MASK 0x0C
103
104#define WINS_LOCAL 0x00 /* local record */
105#define WINS_REMOTE 0x10 /* remote record */
106
107#define WINS_BNODE 0x00 /* Broadcast node */
108#define WINS_PNODE 0x20 /* PtP node */
109#define WINS_MNODE 0x40 /* Mixed node */
110#define WINS_HNODE 0x60 /* Hybrid node */
111
112#define WINS_NONSTATIC 0x00 /* dynamic record */
113#define WINS_STATIC 0x80 /* static record */
114
115#define WINS_STATE_ACTIVE(p) (((p)->data.wins_flags & WINS_STATE_MASK) == WINS_ACTIVE)
116
117
118/* NetBIOS flag identifier. */
119#define NAME_GROUP(p) ((p)->data.nb_flags & NB_GROUP)
120#define NAME_BFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_BFLAG)
121#define NAME_PFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_PFLAG)
122#define NAME_MFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_MFLAG)
123#define NAME_HFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_HFLAG)
124
125/* Samba name state for a name in a namelist. */
126#define NAME_IS_ACTIVE(p) ((p)->data.nb_flags & NB_ACTIVE)
127#define NAME_IN_CONFLICT(p) ((p)->data.nb_flags & NB_CONFL)
128#define NAME_IS_DEREGISTERING(p) ((p)->data.nb_flags & NB_DEREG)
129
130/* Error codes for NetBIOS requests. */
131#define FMT_ERR 0x1 /* Packet format error. */
132#define SRV_ERR 0x2 /* Internal server error. */
133#define NAM_ERR 0x3 /* Name does not exist. */
134#define IMP_ERR 0x4 /* Request not implemented. */
135#define RFS_ERR 0x5 /* Request refused. */
136#define ACT_ERR 0x6 /* Active error - name owned by another host. */
137#define CFT_ERR 0x7 /* Name in conflict error. */
138
139#define REFRESH_TIME (15*60)
140#define NAME_POLL_REFRESH_TIME (5*60)
141#define NAME_POLL_INTERVAL 15
142
143/* Workgroup state identifiers. */
144#define AM_POTENTIAL_MASTER_BROWSER(work) ((work)->mst_state == MST_POTENTIAL)
145#define AM_LOCAL_MASTER_BROWSER(work) ((work)->mst_state == MST_BROWSER)
146#define AM_DOMAIN_MASTER_BROWSER(work) ((work)->dom_state == DOMAIN_MST)
147#define AM_DOMAIN_MEMBER(work) ((work)->log_state == LOGON_SRV)
148
149/* Microsoft browser NetBIOS name. */
150#define MSBROWSE "\001\002__MSBROWSE__\002"
151
152/* Mail slots. */
153#define BROWSE_MAILSLOT "\\MAILSLOT\\BROWSE"
154#define NET_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NETLOGON"
155#define NT_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NTLOGON"
156#define LANMAN_MAILSLOT "\\MAILSLOT\\LANMAN"
157
158/* Samba definitions for find_name_on_subnet(). */
159#define FIND_ANY_NAME 0
160#define FIND_SELF_NAME 1
161
162/*
163 * The different name types that can be in namelists.
164 *
165 * SELF_NAME should only be on the broadcast and unicast subnets.
166 * LMHOSTS_NAME should only be in the remote_broadcast_subnet.
167 * REGISTER_NAME, DNS_NAME, DNSFAIL_NAME should only be in the wins_server_subnet.
168 * WINS_PROXY_NAME should only be on the broadcast subnets.
169 * PERMANENT_NAME can be on all subnets except remote_broadcast_subnet.
170 *
171 */
172
173enum name_source {LMHOSTS_NAME, REGISTER_NAME, SELF_NAME, DNS_NAME,
174 DNSFAIL_NAME, PERMANENT_NAME, WINS_PROXY_NAME};
175enum node_type {B_NODE=0, P_NODE=1, M_NODE=2, NBDD_NODE=3};
176enum packet_type {NMB_PACKET, DGRAM_PACKET};
177
178enum master_state {
179 MST_NONE,
180 MST_POTENTIAL,
181 MST_BACKUP,
182 MST_MSB,
183 MST_BROWSER,
184 MST_UNBECOMING_MASTER
185};
186
187enum domain_state {
188 DOMAIN_NONE,
189 DOMAIN_WAIT,
190 DOMAIN_MST
191};
192
193enum logon_state {
194 LOGON_NONE,
195 LOGON_WAIT,
196 LOGON_SRV
197};
198
199struct subnet_record;
200
201struct nmb_data {
202 uint16 nb_flags; /* Netbios flags. */
203 int num_ips; /* Number of ip entries. */
204 struct in_addr *ip; /* The ip list for this name. */
205
206 enum name_source source; /* Where the name came from. */
207
208 time_t death_time; /* The time the record must be removed (do not remove if 0). */
209 time_t refresh_time; /* The time the record should be refreshed. */
210
211 uint64_t id; /* unique id */
212 struct in_addr wins_ip; /* the adress of the wins server this record comes from */
213
214 int wins_flags; /* similar to the netbios flags but different ! */
215};
216
217/* This structure represents an entry in a local netbios name list. */
218struct name_record {
219 struct name_record *prev, *next;
220 struct subnet_record *subnet;
221 struct nmb_name name; /* The netbios name. */
222 struct nmb_data data; /* The netbios data. */
223};
224
225/* Browser cache for synchronising browse lists. */
226struct browse_cache_record {
227 struct browse_cache_record *prev, *next;
228 unstring lmb_name;
229 unstring work_group;
230 struct in_addr ip;
231 time_t sync_time;
232 time_t death_time; /* The time the record must be removed. */
233};
234
235/* This is used to hold the list of servers in my domain, and is
236 contained within lists of domains. */
237
238struct server_record {
239 struct server_record *next;
240 struct server_record *prev;
241
242 struct subnet_record *subnet;
243
244 struct server_info_struct serv;
245 time_t death_time;
246};
247
248/* A workgroup structure. It contains a list of servers. */
249struct work_record {
250 struct work_record *next;
251 struct work_record *prev;
252
253 struct subnet_record *subnet;
254
255 struct server_record *serverlist;
256
257 /* Stage of development from non-local-master up to local-master browser. */
258 enum master_state mst_state;
259
260 /* Stage of development from non-domain-master to domain-master browser. */
261 enum domain_state dom_state;
262
263 /* Stage of development from non-logon-server to logon server. */
264 enum logon_state log_state;
265
266 /* Work group info. */
267 unstring work_group;
268 int token; /* Used when communicating with backup browsers. */
269 unstring local_master_browser_name; /* Current local master browser. */
270
271 /* Announce info. */
272 time_t lastannounce_time;
273 int announce_interval;
274 bool needannounce;
275
276 /* Timeout time for this workgroup. 0 means permanent. */
277 time_t death_time;
278
279 /* Election info */
280 bool RunningElection;
281 bool needelection;
282 int ElectionCount;
283 uint32 ElectionCriterion;
284
285 /* Domain master browser info. Used for efficient syncs. */
286 struct nmb_name dmb_name;
287 struct in_addr dmb_addr;
288};
289
290/* typedefs needed to define copy & free functions for userdata. */
291struct userdata_struct;
292
293typedef struct userdata_struct * (*userdata_copy_fn)(struct userdata_struct *);
294typedef void (*userdata_free_fn)(struct userdata_struct *);
295
296/* Structure to define any userdata passed around. */
297
298struct userdata_struct {
299 userdata_copy_fn copy_fn;
300 userdata_free_fn free_fn;
301 unsigned int userdata_len;
302 char data[16]; /* 16 is to ensure alignment/padding on all systems */
303};
304
305struct response_record;
306struct packet_struct;
307struct res_rec;
308
309/* typedef to define the function called when this response packet comes in. */
310typedef void (*response_function)(struct subnet_record *, struct response_record *,
311 struct packet_struct *);
312
313/* typedef to define the function called when this response record times out. */
314typedef void (*timeout_response_function)(struct subnet_record *,
315 struct response_record *);
316
317/* typedef to define the function called when the request that caused this
318 response record to be created is successful. */
319typedef void (*success_function)(struct subnet_record *, struct userdata_struct *, ...);
320
321/* typedef to define the function called when the request that caused this
322 response record to be created is unsuccessful. */
323typedef void (*fail_function)(struct subnet_record *, struct response_record *, ...);
324
325/* List of typedefs for success and fail functions of the different query
326 types. Used to catch any compile time prototype errors. */
327
328typedef void (*register_name_success_function)( struct subnet_record *,
329 struct userdata_struct *,
330 struct nmb_name *,
331 uint16,
332 int,
333 struct in_addr);
334typedef void (*register_name_fail_function)( struct subnet_record *,
335 struct response_record *,
336 struct nmb_name *);
337
338typedef void (*release_name_success_function)( struct subnet_record *,
339 struct userdata_struct *,
340 struct nmb_name *,
341 struct in_addr);
342typedef void (*release_name_fail_function)( struct subnet_record *,
343 struct response_record *,
344 struct nmb_name *);
345
346typedef void (*refresh_name_success_function)( struct subnet_record *,
347 struct userdata_struct *,
348 struct nmb_name *,
349 uint16,
350 int,
351 struct in_addr);
352typedef void (*refresh_name_fail_function)( struct subnet_record *,
353 struct response_record *,
354 struct nmb_name *);
355
356typedef void (*query_name_success_function)( struct subnet_record *,
357 struct userdata_struct *,
358 struct nmb_name *,
359 struct in_addr,
360 struct res_rec *answers);
361
362typedef void (*query_name_fail_function)( struct subnet_record *,
363 struct response_record *,
364 struct nmb_name *,
365 int);
366
367typedef void (*node_status_success_function)( struct subnet_record *,
368 struct userdata_struct *,
369 struct res_rec *,
370 struct in_addr);
371typedef void (*node_status_fail_function)( struct subnet_record *,
372 struct response_record *);
373
374/* Initiated name queries are recorded in this list to track any responses. */
375
376struct response_record {
377 struct response_record *next;
378 struct response_record *prev;
379
380 uint16 response_id;
381
382 /* Callbacks for packets received or not. */
383 response_function resp_fn;
384 timeout_response_function timeout_fn;
385
386 /* Callbacks for the request succeeding or not. */
387 success_function success_fn;
388 fail_function fail_fn;
389
390 struct packet_struct *packet;
391
392 struct userdata_struct *userdata;
393
394 int num_msgs;
395
396 time_t repeat_time;
397 time_t repeat_interval;
398 int repeat_count;
399
400 /* Recursion protection. */
401 bool in_expiration_processing;
402};
403
404/* A subnet structure. It contains a list of workgroups and netbios names. */
405
406/*
407 B nodes will have their own, totally separate subnet record, with their
408 own netbios name set. These do NOT interact with other subnet records'
409 netbios names.
410*/
411
412enum subnet_type {
413 NORMAL_SUBNET = 0, /* Subnet listed in interfaces list. */
414 UNICAST_SUBNET = 1, /* Subnet for unicast packets. */
415 REMOTE_BROADCAST_SUBNET = 2, /* Subnet for remote broadcasts. */
416 WINS_SERVER_SUBNET = 3 /* Only created if we are a WINS server. */
417};
418
419struct subnet_record {
420 struct subnet_record *next;
421 struct subnet_record *prev;
422
423 char *subnet_name; /* For Debug identification. */
424 enum subnet_type type; /* To catagorize the subnet. */
425
426 struct work_record *workgrouplist; /* List of workgroups. */
427 struct name_record *namelist; /* List of netbios names. */
428 struct response_record *responselist; /* List of responses expected. */
429
430 bool namelist_changed;
431 bool work_changed;
432
433 struct in_addr bcast_ip;
434 struct in_addr mask_ip;
435 struct in_addr myip;
436 int nmb_sock; /* socket to listen for unicast 137. */
437 int nmb_bcast; /* socket to listen for broadcast 137. */
438 int dgram_sock; /* socket to listen for unicast 138. */
439 int dgram_bcast; /* socket to listen for broadcast 138. */
440};
441
442/* A resource record. */
443struct res_rec {
444 struct nmb_name rr_name;
445 int rr_type;
446 int rr_class;
447 int ttl;
448 int rdlength;
449 char rdata[MAX_DGRAM_SIZE];
450};
451
452/* Define these so we can pass info back to caller of name_query */
453#define NM_FLAGS_RS 0x80 /* Response. Cheat */
454#define NM_FLAGS_AA 0x40 /* Authoritative */
455#define NM_FLAGS_TC 0x20 /* Truncated */
456#define NM_FLAGS_RD 0x10 /* Recursion Desired */
457#define NM_FLAGS_RA 0x08 /* Recursion Available */
458#define NM_FLAGS_B 0x01 /* Broadcast */
459
460/* An nmb packet. */
461struct nmb_packet {
462 struct {
463 int name_trn_id;
464 int opcode;
465 bool response;
466 struct {
467 bool bcast;
468 bool recursion_available;
469 bool recursion_desired;
470 bool trunc;
471 bool authoritative;
472 } nm_flags;
473 int rcode;
474 int qdcount;
475 int ancount;
476 int nscount;
477 int arcount;
478 } header;
479
480 struct {
481 struct nmb_name question_name;
482 int question_type;
483 int question_class;
484 } question;
485
486 struct res_rec *answers;
487 struct res_rec *nsrecs;
488 struct res_rec *additional;
489};
490
491/* msg_type field options - from rfc1002. */
492
493#define DGRAM_UNIQUE 0x10
494#define DGRAM_GROUP 0x11
495#define DGRAM_BROADCAST 0x12
496/* defined in IDL
497#define DGRAM_ERROR 0x13
498*/
499#define DGRAM_QUERY_REQUEST 0x14
500#define DGRAM_POSITIVE_QUERY_RESPONSE 0x15
501#define DGRAM_NEGATIVE_QUERT_RESPONSE 0x16
502
503/* A datagram - this normally contains SMB data in the data[] array. */
504
505struct dgram_packet {
506 struct {
507 int msg_type;
508 struct {
509 enum node_type node_type;
510 bool first;
511 bool more;
512 } flags;
513 int dgm_id;
514 struct in_addr source_ip;
515 int source_port;
516 int dgm_length;
517 int packet_offset;
518 } header;
519 struct nmb_name source_name;
520 struct nmb_name dest_name;
521 int datasize;
522 char data[MAX_DGRAM_SIZE];
523};
524
525/* Define a structure used to queue packets. This will be a linked
526 list of nmb packets. */
527
528struct packet_struct
529{
530 struct packet_struct *next;
531 struct packet_struct *prev;
532 bool locked;
533 struct in_addr ip;
534 int port;
535 int recv_fd;
536 int send_fd;
537 time_t timestamp;
538 enum packet_type packet_type;
539 union {
540 struct nmb_packet nmb;
541 struct dgram_packet dgram;
542 } packet;
543};
544
545/* Ids for netbios packet types. */
546
547#define ANN_HostAnnouncement 1
548#define ANN_AnnouncementRequest 2
549#define ANN_Election 8
550#define ANN_GetBackupListReq 9
551#define ANN_GetBackupListResp 10
552#define ANN_BecomeBackup 11
553#define ANN_DomainAnnouncement 12
554#define ANN_MasterAnnouncement 13
555#define ANN_ResetBrowserState 14
556#define ANN_LocalMasterAnnouncement 15
557
558
559/* Broadcast packet announcement intervals, in minutes. */
560
561/* Attempt to add domain logon and domain master names. */
562#define CHECK_TIME_ADD_DOM_NAMES 5
563
564/* Search for master browsers of workgroups samba knows about,
565 except default. */
566#define CHECK_TIME_MST_BROWSE 5
567
568/* Request backup browser announcements from other servers. */
569#define CHECK_TIME_ANNOUNCE_BACKUP 15
570
571/* Request host announcements from other servers: min and max of interval. */
572#define CHECK_TIME_MIN_HOST_ANNCE 3
573#define CHECK_TIME_MAX_HOST_ANNCE 12
574
575/* Announce as master to WINS server and any Primary Domain Controllers. */
576#define CHECK_TIME_MST_ANNOUNCE 15
577
578/* Time between syncs from domain master browser to local master browsers. */
579#define CHECK_TIME_DMB_TO_LMB_SYNC 15
580
581/* Do all remote announcements this often. */
582#define REMOTE_ANNOUNCE_INTERVAL 180
583
584/* what is the maximum period between name refreshes. Note that this only
585 affects non-permanent self names (in seconds) */
586#define MAX_REFRESH_TIME (60*20)
587
588/* The Extinction interval: 4 days, time a node will stay in released state */
589#define EXTINCTION_INTERVAL (4*24*60*60)
590
591/* The Extinction time-out: 1 day, time a node will stay in deleted state */
592#define EXTINCTION_TIMEOUT (24*60*60)
593
594/* Macro's to enumerate subnets either with or without
595 the UNICAST subnet. */
596
597extern struct subnet_record *subnetlist;
598extern struct subnet_record *unicast_subnet;
599extern struct subnet_record *wins_server_subnet;
600extern struct subnet_record *remote_broadcast_subnet;
601
602#define FIRST_SUBNET subnetlist
603#define NEXT_SUBNET_EXCLUDING_UNICAST(x) ((x)->next)
604#define NEXT_SUBNET_INCLUDING_UNICAST(x) (get_next_subnet_maybe_unicast((x)))
605
606/* wins replication record used between nmbd and wrepld */
607typedef struct _WINS_RECORD {
608 char name[17];
609 char type;
610 int nb_flags;
611 int wins_flags;
612 uint64_t id;
613 int num_ips;
614 struct in_addr ip[25];
615 struct in_addr wins_ip;
616} WINS_RECORD;
617
618/* To be removed. */
619enum state_type { TEST };
620#endif /* _NAMESERV_H_ */
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