4 Unix SMB/CIFS implementation.
5 NBT netbios header - version 2
6 Copyright (C) Andrew Tridgell 1994-1998
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 2 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #define INFO_VERSION "INFO/version"
25 #define INFO_COUNT "INFO/num_entries"
26 #define INFO_ID_HIGH "INFO/id_high"
27 #define INFO_ID_LOW "INFO/id_low"
28 #define ENTRY_PREFIX "ENTRY/"
30 #define PERMANENT_TTL 0
32 /* NTAS uses 2, NT uses 1, WfWg uses 0 */
33 #define MAINTAIN_LIST 2
34 #define ELECTION_VERSION 1
36 #define MAX_DGRAM_SIZE (576) /* tcp/ip datagram limit is 576 bytes */
37 #define MIN_DGRAM_SIZE 12
39 /*********************************************************
40 Types of reply packet.
41 **********************************************************/
43 enum netbios_reply_type_code
{ NMB_QUERY
, NMB_STATUS
, NMB_REG
, NMB_REG_REFRESH
,
44 NMB_REL
, NMB_WAIT_ACK
, NMB_MULTIHOMED_REG
,
45 WINS_REG
, WINS_QUERY
};
47 /* From rfc1002, 4.2.1.2 */
49 #define QUESTION_TYPE_NB_QUERY 0x20
50 #define QUESTION_TYPE_NB_STATUS 0x21
53 #define QUESTION_CLASS_IN 0x1
55 /* Opcode definitions */
56 #define NMB_NAME_QUERY_OPCODE 0x0
57 #define NMB_NAME_REG_OPCODE 0x05 /* see rfc1002.txt 4.2.2,3,5,6,7,8 */
58 #define NMB_NAME_RELEASE_OPCODE 0x06 /* see rfc1002.txt 4.2.9,10,11 */
59 #define NMB_WACK_OPCODE 0x07 /* see rfc1002.txt 4.2.16 */
60 /* Ambiguity in rfc1002 about which of these is correct. */
61 /* WinNT uses 8 by default but can be made to use 9. */
62 #define NMB_NAME_REFRESH_OPCODE_8 0x08 /* see rfc1002.txt 4.2.4 */
63 #define NMB_NAME_REFRESH_OPCODE_9 0x09 /* see rfc1002.txt 4.2.4 */
64 #define NMB_NAME_MULTIHOMED_REG_OPCODE 0x0F /* Invented by Microsoft. */
66 /* XXXX what about all the other types?? 0x1, 0x2, 0x3, 0x4, 0x8? */
68 /* Resource record types. rfc1002 4.2.1.3 */
70 #define RR_TYPE_NS 0x2
71 #define RR_TYPE_NULL 0xA
72 #define RR_TYPE_NB 0x20
73 #define RR_TYPE_NBSTAT 0x21
75 /* Resource record class. */
76 #define RR_CLASS_IN 0x1
81 #define NB_ACTIVE 0x04
84 #define NB_BFLAG 0x00 /* Broadcast node type. */
85 #define NB_PFLAG 0x20 /* Point-to-point node type. */
86 #define NB_MFLAG 0x40 /* Mixed bcast & p-p node type. */
87 #define NB_HFLAG 0x60 /* Microsoft 'hybrid' node type. */
88 #define NB_NODETYPEMASK 0x60
89 /* Mask applied to outgoing NetBIOS flags. */
90 #define NB_FLGMSK 0xE0
92 /* The wins flags. Looks like the nbflags ! */
93 #define WINS_UNIQUE 0x00 /* Unique record */
94 #define WINS_NGROUP 0x01 /* Normal Group eg: 1B */
95 #define WINS_SGROUP 0x02 /* Special Group eg: 1C */
96 #define WINS_MHOMED 0x03 /* MultiHomed */
98 #define WINS_ACTIVE 0x00 /* active record */
99 #define WINS_RELEASED 0x04 /* released record */
100 #define WINS_TOMBSTONED 0x08 /* tombstoned record */
101 #define WINS_DELETED 0x0C /* deleted record */
103 #define WINS_STATE_MASK 0x0C
105 #define WINS_LOCAL 0x00 /* local record */
106 #define WINS_REMOTE 0x10 /* remote record */
108 #define WINS_BNODE 0x00 /* Broadcast node */
109 #define WINS_PNODE 0x20 /* PtP node */
110 #define WINS_MNODE 0x40 /* Mixed node */
111 #define WINS_HNODE 0x60 /* Hybrid node */
113 #define WINS_NONSTATIC 0x00 /* dynamic record */
114 #define WINS_STATIC 0x80 /* static record */
116 #define WINS_STATE_ACTIVE(p) (((p)->data.wins_flags & WINS_STATE_MASK) == WINS_ACTIVE)
119 /* NetBIOS flag identifier. */
120 #define NAME_GROUP(p) ((p)->data.nb_flags & NB_GROUP)
121 #define NAME_BFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_BFLAG)
122 #define NAME_PFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_PFLAG)
123 #define NAME_MFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_MFLAG)
124 #define NAME_HFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_HFLAG)
126 /* Samba name state for a name in a namelist. */
127 #define NAME_IS_ACTIVE(p) ((p)->data.nb_flags & NB_ACTIVE)
128 #define NAME_IN_CONFLICT(p) ((p)->data.nb_flags & NB_CONFL)
129 #define NAME_IS_DEREGISTERING(p) ((p)->data.nb_flags & NB_DEREG)
131 /* Error codes for NetBIOS requests. */
132 #define FMT_ERR 0x1 /* Packet format error. */
133 #define SRV_ERR 0x2 /* Internal server error. */
134 #define NAM_ERR 0x3 /* Name does not exist. */
135 #define IMP_ERR 0x4 /* Request not implemented. */
136 #define RFS_ERR 0x5 /* Request refused. */
137 #define ACT_ERR 0x6 /* Active error - name owned by another host. */
138 #define CFT_ERR 0x7 /* Name in conflict error. */
140 #define REFRESH_TIME (15*60)
141 #define NAME_POLL_REFRESH_TIME (5*60)
142 #define NAME_POLL_INTERVAL 15
144 /* Workgroup state identifiers. */
145 #define AM_POTENTIAL_MASTER_BROWSER(work) ((work)->mst_state == MST_POTENTIAL)
146 #define AM_LOCAL_MASTER_BROWSER(work) ((work)->mst_state == MST_BROWSER)
147 #define AM_DOMAIN_MASTER_BROWSER(work) ((work)->dom_state == DOMAIN_MST)
148 #define AM_DOMAIN_MEMBER(work) ((work)->log_state == LOGON_SRV)
150 /* Microsoft browser NetBIOS name. */
151 #define MSBROWSE "\001\002__MSBROWSE__\002"
154 #define BROWSE_MAILSLOT "\\MAILSLOT\\BROWSE"
155 #define NET_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NETLOGON"
156 #define NT_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NTLOGON"
157 #define LANMAN_MAILSLOT "\\MAILSLOT\\LANMAN"
159 /* Samba definitions for find_name_on_subnet(). */
160 #define FIND_ANY_NAME 0
161 #define FIND_SELF_NAME 1
164 * The different name types that can be in namelists.
166 * SELF_NAME should only be on the broadcast and unicast subnets.
167 * LMHOSTS_NAME should only be in the remote_broadcast_subnet.
168 * REGISTER_NAME, DNS_NAME, DNSFAIL_NAME should only be in the wins_server_subnet.
169 * WINS_PROXY_NAME should only be on the broadcast subnets.
170 * PERMANENT_NAME can be on all subnets except remote_broadcast_subnet.
174 enum name_source
{LMHOSTS_NAME
, REGISTER_NAME
, SELF_NAME
, DNS_NAME
,
175 DNSFAIL_NAME
, PERMANENT_NAME
, WINS_PROXY_NAME
};
176 enum node_type
{B_NODE
=0, P_NODE
=1, M_NODE
=2, NBDD_NODE
=3};
177 enum packet_type
{NMB_PACKET
, DGRAM_PACKET
};
186 MST_UNBECOMING_MASTER
203 struct subnet_record
;
207 uint16 nb_flags
; /* Netbios flags. */
208 int num_ips
; /* Number of ip entries. */
209 struct in_addr
*ip
; /* The ip list for this name. */
211 enum name_source source
; /* Where the name came from. */
213 time_t death_time
; /* The time the record must be removed (do not remove if 0). */
214 time_t refresh_time
; /* The time the record should be refreshed. */
216 SMB_BIG_UINT id
; /* unique id */
217 struct in_addr wins_ip
; /* the adress of the wins server this record comes from */
219 int wins_flags
; /* similar to the netbios flags but different ! */
222 /* This structure represents an entry in a local netbios name list. */
226 struct subnet_record
*subnet
;
227 struct nmb_name name
; /* The netbios name. */
228 struct nmb_data data
; /* The netbios data. */
231 /* Browser cache for synchronising browse lists. */
232 struct browse_cache_record
239 time_t death_time
; /* The time the record must be removed. */
242 /* This is used to hold the list of servers in my domain, and is
243 contained within lists of domains. */
247 struct server_record
*next
;
248 struct server_record
*prev
;
250 struct subnet_record
*subnet
;
252 struct server_info_struct serv
;
256 /* A workgroup structure. It contains a list of servers. */
259 struct work_record
*next
;
260 struct work_record
*prev
;
262 struct subnet_record
*subnet
;
264 struct server_record
*serverlist
;
266 /* Stage of development from non-local-master up to local-master browser. */
267 enum master_state mst_state
;
269 /* Stage of development from non-domain-master to domain-master browser. */
270 enum domain_state dom_state
;
272 /* Stage of development from non-logon-server to logon server. */
273 enum logon_state log_state
;
275 /* Work group info. */
277 int token
; /* Used when communicating with backup browsers. */
278 fstring local_master_browser_name
; /* Current local master browser. */
281 time_t lastannounce_time
;
282 int announce_interval
;
285 /* Timeout time for this workgroup. 0 means permanent. */
289 BOOL RunningElection
;
292 uint32 ElectionCriterion
;
294 /* Domain master browser info. Used for efficient syncs. */
295 struct nmb_name dmb_name
;
296 struct in_addr dmb_addr
;
299 /* typedefs needed to define copy & free functions for userdata. */
300 struct userdata_struct
;
302 typedef struct userdata_struct
* (*userdata_copy_fn
)(struct userdata_struct
*);
303 typedef void (*userdata_free_fn
)(struct userdata_struct
*);
305 /* Structure to define any userdata passed around. */
307 struct userdata_struct
{
308 userdata_copy_fn copy_fn
;
309 userdata_free_fn free_fn
;
310 unsigned int userdata_len
;
311 char data
[16]; /* 16 is to ensure alignment/padding on all systems */
314 struct response_record
;
315 struct packet_struct
;
318 /* typedef to define the function called when this response packet comes in. */
319 typedef void (*response_function
)(struct subnet_record
*, struct response_record
*,
320 struct packet_struct
*);
322 /* typedef to define the function called when this response record times out. */
323 typedef void (*timeout_response_function
)(struct subnet_record
*,
324 struct response_record
*);
326 /* typedef to define the function called when the request that caused this
327 response record to be created is successful. */
328 typedef void (*success_function
)(struct subnet_record
*, struct userdata_struct
*, ...);
330 /* typedef to define the function called when the request that caused this
331 response record to be created is unsuccessful. */
332 typedef void (*fail_function
)(struct subnet_record
*, struct response_record
*, ...);
334 /* List of typedefs for success and fail functions of the different query
335 types. Used to catch any compile time prototype errors. */
337 typedef void (*register_name_success_function
)( struct subnet_record
*,
338 struct userdata_struct
*,
343 typedef void (*register_name_fail_function
)( struct subnet_record
*,
344 struct response_record
*,
347 typedef void (*release_name_success_function
)( struct subnet_record
*,
348 struct userdata_struct
*,
351 typedef void (*release_name_fail_function
)( struct subnet_record
*,
352 struct response_record
*,
355 typedef void (*refresh_name_success_function
)( struct subnet_record
*,
356 struct userdata_struct
*,
361 typedef void (*refresh_name_fail_function
)( struct subnet_record
*,
362 struct response_record
*,
365 typedef void (*query_name_success_function
)( struct subnet_record
*,
366 struct userdata_struct
*,
369 struct res_rec
*answers
);
371 typedef void (*query_name_fail_function
)( struct subnet_record
*,
372 struct response_record
*,
376 typedef void (*node_status_success_function
)( struct subnet_record
*,
377 struct userdata_struct
*,
380 typedef void (*node_status_fail_function
)( struct subnet_record
*,
381 struct response_record
*);
383 /* Initiated name queries are recorded in this list to track any responses. */
385 struct response_record
387 struct response_record
*next
;
388 struct response_record
*prev
;
392 /* Callbacks for packets received or not. */
393 response_function resp_fn
;
394 timeout_response_function timeout_fn
;
396 /* Callbacks for the request succeeding or not. */
397 success_function success_fn
;
398 fail_function fail_fn
;
400 struct packet_struct
*packet
;
402 struct userdata_struct
*userdata
;
407 time_t repeat_interval
;
410 /* Recursion protection. */
411 BOOL in_expiration_processing
;
414 /* A subnet structure. It contains a list of workgroups and netbios names. */
417 B nodes will have their own, totally separate subnet record, with their
418 own netbios name set. These do NOT interact with other subnet records'
423 NORMAL_SUBNET
= 0, /* Subnet listed in interfaces list. */
424 UNICAST_SUBNET
= 1, /* Subnet for unicast packets. */
425 REMOTE_BROADCAST_SUBNET
= 2, /* Subnet for remote broadcasts. */
426 WINS_SERVER_SUBNET
= 3 /* Only created if we are a WINS server. */
431 struct subnet_record
*next
;
432 struct subnet_record
*prev
;
434 char *subnet_name
; /* For Debug identification. */
435 enum subnet_type type
; /* To catagorize the subnet. */
437 struct work_record
*workgrouplist
; /* List of workgroups. */
438 ubi_trRoot namelist
[1]; /* List of netbios names. */
439 struct response_record
*responselist
; /* List of responses expected. */
441 BOOL namelist_changed
;
444 struct in_addr bcast_ip
;
445 struct in_addr mask_ip
;
447 int nmb_sock
; /* socket to listen for unicast 137. */
448 int dgram_sock
; /* socket to listen for unicast 138. */
451 /* A resource record. */
453 struct nmb_name rr_name
;
458 char rdata
[MAX_DGRAM_SIZE
];
461 /* Define these so we can pass info back to caller of name_query */
462 #define NM_FLAGS_RS 0x80 /* Response. Cheat */
463 #define NM_FLAGS_AA 0x40 /* Authoritative */
464 #define NM_FLAGS_TC 0x20 /* Truncated */
465 #define NM_FLAGS_RD 0x10 /* Recursion Desired */
466 #define NM_FLAGS_RA 0x08 /* Recursion Available */
467 #define NM_FLAGS_B 0x01 /* Broadcast */
478 BOOL recursion_available
;
479 BOOL recursion_desired
;
491 struct nmb_name question_name
;
496 struct res_rec
*answers
;
497 struct res_rec
*nsrecs
;
498 struct res_rec
*additional
;
501 /* msg_type field options - from rfc1002. */
503 #define DGRAM_UNIQUE 0x10
504 #define DGRAM_GROUP 0x11
505 #define DGRAM_BROADCAST 0x12
506 #define DGRAM_ERROR 0x13
507 #define DGRAM_QUERY_REQUEST 0x14
508 #define DGRAM_POSITIVE_QUERY_RESPONSE 0x15
509 #define DGRAM_NEGATIVE_QUERT_RESPONSE 0x16
511 /* A datagram - this normally contains SMB data in the data[] array. */
513 struct dgram_packet
{
517 enum node_type node_type
;
522 struct in_addr source_ip
;
527 struct nmb_name source_name
;
528 struct nmb_name dest_name
;
530 char data
[MAX_DGRAM_SIZE
];
533 /* Define a structure used to queue packets. This will be a linked
534 list of nmb packets. */
538 struct packet_struct
*next
;
539 struct packet_struct
*prev
;
545 enum packet_type packet_type
;
547 struct nmb_packet nmb
;
548 struct dgram_packet dgram
;
552 /* NETLOGON opcodes */
554 #define QUERYFORPDC 7 /* Query for PDC. */
555 #define SAM_UAS_CHANGE 10 /* Announce change to UAS or SAM. */
556 #define QUERYFORPDC_R 12 /* Response to Query for PDC. */
558 #define SAMLOGON_R 19
559 #define SAMLOGON_UNK_R 21
561 /* Ids for netbios packet types. */
563 #define ANN_HostAnnouncement 1
564 #define ANN_AnnouncementRequest 2
565 #define ANN_Election 8
566 #define ANN_GetBackupListReq 9
567 #define ANN_GetBackupListResp 10
568 #define ANN_BecomeBackup 11
569 #define ANN_DomainAnnouncement 12
570 #define ANN_MasterAnnouncement 13
571 #define ANN_ResetBrowserState 14
572 #define ANN_LocalMasterAnnouncement 15
575 /* Broadcast packet announcement intervals, in minutes. */
577 /* Attempt to add domain logon and domain master names. */
578 #define CHECK_TIME_ADD_DOM_NAMES 5
580 /* Search for master browsers of workgroups samba knows about,
582 #define CHECK_TIME_MST_BROWSE 5
584 /* Request backup browser announcements from other servers. */
585 #define CHECK_TIME_ANNOUNCE_BACKUP 15
587 /* Request host announcements from other servers: min and max of interval. */
588 #define CHECK_TIME_MIN_HOST_ANNCE 3
589 #define CHECK_TIME_MAX_HOST_ANNCE 12
591 /* Announce as master to WINS server and any Primary Domain Controllers. */
592 #define CHECK_TIME_MST_ANNOUNCE 15
594 /* Time between syncs from domain master browser to local master browsers. */
595 #define CHECK_TIME_DMB_TO_LMB_SYNC 15
597 /* Do all remote announcements this often. */
598 #define REMOTE_ANNOUNCE_INTERVAL 180
600 /* what is the maximum period between name refreshes. Note that this only
601 affects non-permanent self names (in seconds) */
602 #define MAX_REFRESH_TIME (60*20)
604 /* The Extinction interval: 4 days, time a node will stay in released state */
605 #define EXTINCTION_INTERVAL (4*24*60*60)
607 /* The Extinction time-out: 1 day, time a node will stay in deleted state */
608 #define EXTINCTION_TIMEOUT (24*60*60)
610 /* Macro's to enumerate subnets either with or without
611 the UNICAST subnet. */
613 extern struct subnet_record
*subnetlist
;
614 extern struct subnet_record
*unicast_subnet
;
615 extern struct subnet_record
*wins_server_subnet
;
616 extern struct subnet_record
*remote_broadcast_subnet
;
618 #define FIRST_SUBNET subnetlist
619 #define NEXT_SUBNET_EXCLUDING_UNICAST(x) ((x)->next)
620 #define NEXT_SUBNET_INCLUDING_UNICAST(x) (get_next_subnet_maybe_unicast((x)))
622 /* wins replication record used between nmbd and wrepld */
623 typedef struct _WINS_RECORD
{
630 struct in_addr ip
[25];
631 struct in_addr wins_ip
;
635 enum state_type
{ TEST
};
636 #endif /* _NAMESERV_H_ */