4 Unix SMB/Netbios implementation.
6 NBT netbios header - version 2
7 Copyright (C) Andrew Tridgell 1994-1998
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define PERMANENT_TTL 0
27 /* NTAS uses 2, NT uses 1, WfWg uses 0 */
28 #define MAINTAIN_LIST 2
29 #define ELECTION_VERSION 1
31 #define MAX_DGRAM_SIZE (576) /* tcp/ip datagram limit is 576 bytes */
32 #define MIN_DGRAM_SIZE 12
34 /*********************************************************
35 Types of reply packet.
36 **********************************************************/
38 enum netbios_reply_type_code { NMB_QUERY, NMB_STATUS, NMB_REG, NMB_REG_REFRESH,
39 NMB_REL, NMB_WAIT_ACK, NMB_MULTIHOMED_REG,
40 WINS_REG, WINS_QUERY };
42 /* From rfc1002, 4.2.1.2 */
44 #define QUESTION_TYPE_NB_QUERY 0x20
45 #define QUESTION_TYPE_NB_STATUS 0x21
48 #define QUESTION_CLASS_IN 0x1
50 /* Opcode definitions */
51 #define NMB_NAME_QUERY_OPCODE 0x0
52 #define NMB_NAME_REG_OPCODE 0x05 /* see rfc1002.txt 4.2.2,3,5,6,7,8 */
53 #define NMB_NAME_RELEASE_OPCODE 0x06 /* see rfc1002.txt 4.2.9,10,11 */
54 #define NMB_WACK_OPCODE 0x07 /* see rfc1002.txt 4.2.16 */
55 /* Ambiguity in rfc1002 about which of these is correct. */
56 /* WinNT uses 8 by default but can be made to use 9. */
57 #define NMB_NAME_REFRESH_OPCODE_8 0x08 /* see rfc1002.txt 4.2.4 */
58 #define NMB_NAME_REFRESH_OPCODE_9 0x09 /* see rfc1002.txt 4.2.4 */
59 #define NMB_NAME_MULTIHOMED_REG_OPCODE 0x0F /* Invented by Microsoft. */
61 /* XXXX what about all the other types?? 0x1, 0x2, 0x3, 0x4, 0x8? */
63 /* Resource record types. rfc1002 4.2.1.3 */
65 #define RR_TYPE_NS 0x2
66 #define RR_TYPE_NULL 0xA
67 #define RR_TYPE_NB 0x20
68 #define RR_TYPE_NBSTAT 0x21
70 /* Resource record class. */
71 #define RR_CLASS_IN 0x1
76 #define NB_ACTIVE 0x04
79 #define NB_BFLAG 0x00 /* Broadcast node type. */
80 #define NB_PFLAG 0x20 /* Point-to-point node type. */
81 #define NB_MFLAG 0x40 /* Mixed bcast & p-p node type. */
82 #define NB_HFLAG 0x60 /* Microsoft 'hybrid' node type. */
83 #define NB_NODETYPEMASK 0x60
84 /* Mask applied to outgoing NetBIOS flags. */
85 #define NB_FLGMSK 0xE0
87 /* NetBIOS flag identifier. */
88 #define NAME_GROUP(p) ((p)->data.nb_flags & NB_GROUP)
89 #define NAME_BFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_BFLAG)
90 #define NAME_PFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_PFLAG)
91 #define NAME_MFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_MFLAG)
92 #define NAME_HFLAG(p) (((p)->data.nb_flags & NB_NODETYPEMASK) == NB_HFLAG)
94 /* Samba name state for a name in a namelist. */
95 #define NAME_IS_ACTIVE(p) ((p)->data.nb_flags & NB_ACTIVE)
96 #define NAME_IN_CONFLICT(p) ((p)->data.nb_flags & NB_CONFL)
97 #define NAME_IS_DEREGISTERING(p) ((p)->data.nb_flags & NB_DEREG)
99 /* Error codes for NetBIOS requests. */
100 #define FMT_ERR 0x1 /* Packet format error. */
101 #define SRV_ERR 0x2 /* Internal server error. */
102 #define NAM_ERR 0x3 /* Name does not exist. */
103 #define IMP_ERR 0x4 /* Request not implemented. */
104 #define RFS_ERR 0x5 /* Request refused. */
105 #define ACT_ERR 0x6 /* Active error - name owned by another host. */
106 #define CFT_ERR 0x7 /* Name in conflict error. */
108 #define REFRESH_TIME (15*60)
109 #define NAME_POLL_REFRESH_TIME (5*60)
110 #define NAME_POLL_INTERVAL 15
112 /* Workgroup state identifiers. */
113 #define AM_POTENTIAL_MASTER_BROWSER(work) ((work)->mst_state == MST_POTENTIAL)
114 #define AM_LOCAL_MASTER_BROWSER(work) ((work)->mst_state == MST_BROWSER)
115 #define AM_DOMAIN_MASTER_BROWSER(work) ((work)->dom_state == DOMAIN_MST)
116 #define AM_DOMAIN_MEMBER(work) ((work)->log_state == LOGON_SRV)
118 /* Microsoft browser NetBIOS name. */
119 #define MSBROWSE "\001\002__MSBROWSE__\002"
122 #define BROWSE_MAILSLOT "\\MAILSLOT\\BROWSE"
123 #define NET_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NETLOGON"
124 #define NT_LOGON_MAILSLOT "\\MAILSLOT\\NET\\NTLOGON"
125 #define LANMAN_MAILSLOT "\\MAILSLOT\\LANMAN"
127 /* Samba definitions for find_name_on_subnet(). */
128 #define FIND_ANY_NAME 0
129 #define FIND_SELF_NAME 1
132 * The different name types that can be in namelists.
134 * SELF_NAME should only be on the broadcast and unicast subnets.
135 * LMHOSTS_NAME should only be in the remote_broadcast_subnet.
136 * REGISTER_NAME, DNS_NAME, DNSFAIL_NAME should only be in the wins_server_subnet.
137 * WINS_PROXY_NAME should only be on the broadcast subnets.
138 * PERMANENT_NAME can be on all subnets except remote_broadcast_subnet.
142 enum name_source {LMHOSTS_NAME, REGISTER_NAME, SELF_NAME, DNS_NAME,
143 DNSFAIL_NAME, PERMANENT_NAME, WINS_PROXY_NAME};
144 enum node_type {B_NODE=0, P_NODE=1, M_NODE=2, NBDD_NODE=3};
145 enum packet_type {NMB_PACKET, DGRAM_PACKET};
154 MST_UNBECOMING_MASTER
171 struct subnet_record;
173 /* A netbios name structure. */
177 unsigned int name_type;
182 uint16 nb_flags; /* Netbios flags. */
183 int num_ips; /* Number of ip entries. */
184 struct in_addr *ip; /* The ip list for this name. */
186 enum name_source source; /* Where the name came from. */
188 time_t death_time; /* The time the record must be removed (do not remove if 0). */
189 time_t refresh_time; /* The time the record should be refreshed. */
192 /* This structure represents an entry in a local netbios name list. */
196 struct subnet_record *subnet;
197 struct nmb_name name; /* The netbios name. */
198 struct nmb_data data; /* The netbios data. */
201 /* Browser cache for synchronising browse lists. */
202 struct browse_cache_record
209 time_t death_time; /* The time the record must be removed. */
212 /* This is used to hold the list of servers in my domain, and is
213 contained within lists of domains. */
217 struct server_record *next;
218 struct server_record *prev;
220 struct subnet_record *subnet;
222 struct server_info_struct serv;
226 /* A workgroup structure. It contains a list of servers. */
229 struct work_record *next;
230 struct work_record *prev;
232 struct subnet_record *subnet;
234 struct server_record *serverlist;
236 /* Stage of development from non-local-master up to local-master browser. */
237 enum master_state mst_state;
239 /* Stage of development from non-domain-master to domain-master browser. */
240 enum domain_state dom_state;
242 /* Stage of development from non-logon-server to logon server. */
243 enum logon_state log_state;
245 /* Work group info. */
247 int token; /* Used when communicating with backup browsers. */
248 fstring local_master_browser_name; /* Current local master browser. */
251 time_t lastannounce_time;
252 int announce_interval;
255 /* Timeout time for this workgroup. 0 means permanent. */
259 BOOL RunningElection;
262 uint32 ElectionCriterion;
264 /* Domain master browser info. Used for efficient syncs. */
265 struct nmb_name dmb_name;
266 struct in_addr dmb_addr;
269 /* typedefs needed to define copy & free functions for userdata. */
270 struct userdata_struct;
272 typedef struct userdata_struct * (*userdata_copy_fn)(struct userdata_struct *);
273 typedef void (*userdata_free_fn)(struct userdata_struct *);
275 /* Structure to define any userdata passed around. */
277 struct userdata_struct {
278 userdata_copy_fn copy_fn;
279 userdata_free_fn free_fn;
280 unsigned int userdata_len;
281 char data[16]; /* 16 is to ensure alignment/padding on all systems */
284 struct response_record;
285 struct packet_struct;
288 /* typedef to define the function called when this response packet comes in. */
289 typedef void (*response_function)(struct subnet_record *, struct response_record *,
290 struct packet_struct *);
292 /* typedef to define the function called when this response record times out. */
293 typedef void (*timeout_response_function)(struct subnet_record *,
294 struct response_record *);
296 /* typedef to define the function called when the request that caused this
297 response record to be created is successful. */
298 typedef void (*success_function)(struct subnet_record *, struct userdata_struct *, ...);
300 /* typedef to define the function called when the request that caused this
301 response record to be created is unsuccessful. */
302 typedef void (*fail_function)(struct subnet_record *, struct response_record *, ...);
304 /* List of typedefs for success and fail functions of the different query
305 types. Used to catch any compile time prototype errors. */
307 typedef void (*register_name_success_function)( struct subnet_record *,
308 struct userdata_struct *,
313 typedef void (*register_name_fail_function)( struct subnet_record *,
314 struct response_record *,
317 typedef void (*release_name_success_function)( struct subnet_record *,
318 struct userdata_struct *,
321 typedef void (*release_name_fail_function)( struct subnet_record *,
322 struct response_record *,
325 typedef void (*refresh_name_success_function)( struct subnet_record *,
326 struct userdata_struct *,
331 typedef void (*refresh_name_fail_function)( struct subnet_record *,
332 struct response_record *,
335 typedef void (*query_name_success_function)( struct subnet_record *,
336 struct userdata_struct *,
339 struct res_rec *answers);
341 typedef void (*query_name_fail_function)( struct subnet_record *,
342 struct response_record *,
346 typedef void (*node_status_success_function)( struct subnet_record *,
347 struct userdata_struct *,
350 typedef void (*node_status_fail_function)( struct subnet_record *,
351 struct response_record *);
353 /* Initiated name queries are recorded in this list to track any responses. */
355 struct response_record
357 struct response_record *next;
358 struct response_record *prev;
362 /* Callbacks for packets received or not. */
363 response_function resp_fn;
364 timeout_response_function timeout_fn;
366 /* Callbacks for the request succeeding or not. */
367 success_function success_fn;
368 fail_function fail_fn;
370 struct packet_struct *packet;
372 struct userdata_struct *userdata;
377 time_t repeat_interval;
381 /* A subnet structure. It contains a list of workgroups and netbios names. */
384 B nodes will have their own, totally separate subnet record, with their
385 own netbios name set. These do NOT interact with other subnet records'
390 NORMAL_SUBNET = 0, /* Subnet listed in interfaces list. */
391 UNICAST_SUBNET = 1, /* Subnet for unicast packets. */
392 REMOTE_BROADCAST_SUBNET = 2, /* Subnet for remote broadcasts. */
393 WINS_SERVER_SUBNET = 3 /* Only created if we are a WINS server. */
398 struct subnet_record *next;
399 struct subnet_record *prev;
401 char *subnet_name; /* For Debug identification. */
402 enum subnet_type type; /* To catagorize the subnet. */
404 struct work_record *workgrouplist; /* List of workgroups. */
405 ubi_trRoot namelist[1]; /* List of netbios names. */
406 struct response_record *responselist; /* List of responses expected. */
408 BOOL namelist_changed;
411 struct in_addr bcast_ip;
412 struct in_addr mask_ip;
414 int nmb_sock; /* socket to listen for unicast 137. */
415 int dgram_sock; /* socket to listen for unicast 138. */
418 /* A resource record. */
420 struct nmb_name rr_name;
425 char rdata[MAX_DGRAM_SIZE];
437 BOOL recursion_available;
438 BOOL recursion_desired;
450 struct nmb_name question_name;
455 struct res_rec *answers;
456 struct res_rec *nsrecs;
457 struct res_rec *additional;
461 /* A datagram - this normally contains SMB data in the data[] array. */
463 struct dgram_packet {
467 enum node_type node_type;
472 struct in_addr source_ip;
477 struct nmb_name source_name;
478 struct nmb_name dest_name;
480 char data[MAX_DGRAM_SIZE];
483 /* Define a structure used to queue packets. This will be a linked
484 list of nmb packets. */
488 struct packet_struct *next;
489 struct packet_struct *prev;
495 enum packet_type packet_type;
497 struct nmb_packet nmb;
498 struct dgram_packet dgram;
502 /* NETLOGON opcodes */
504 #define QUERYFORPDC 7 /* Query for PDC. */
505 #define QUERYFORPDC_R 12 /* Response to Query for PDC. */
507 #define SAMLOGON_R 19
510 /* Ids for netbios packet types. */
512 #define ANN_HostAnnouncement 1
513 #define ANN_AnnouncementRequest 2
514 #define ANN_Election 8
515 #define ANN_GetBackupListReq 9
516 #define ANN_GetBackupListResp 10
517 #define ANN_BecomeBackup 11
518 #define ANN_DomainAnnouncement 12
519 #define ANN_MasterAnnouncement 13
520 #define ANN_ResetBrowserState 14
521 #define ANN_LocalMasterAnnouncement 15
524 /* Broadcast packet announcement intervals, in minutes. */
526 /* Attempt to add domain logon and domain master names. */
527 #define CHECK_TIME_ADD_DOM_NAMES 5
529 /* Search for master browsers of workgroups samba knows about,
531 #define CHECK_TIME_MST_BROWSE 5
533 /* Request backup browser announcements from other servers. */
534 #define CHECK_TIME_ANNOUNCE_BACKUP 15
536 /* Request host announcements from other servers: min and max of interval. */
537 #define CHECK_TIME_MIN_HOST_ANNCE 3
538 #define CHECK_TIME_MAX_HOST_ANNCE 12
540 /* Announce as master to WINS server and any Primary Domain Controllers. */
541 #define CHECK_TIME_MST_ANNOUNCE 15
543 /* Time between syncs from domain master browser to local master browsers. */
544 #define CHECK_TIME_DMB_TO_LMB_SYNC 15
546 /* Do all remote announcements this often. */
547 #define REMOTE_ANNOUNCE_INTERVAL 180
549 /* Types of machine we can announce as. */
550 #define ANNOUNCE_AS_NT 1
551 #define ANNOUNCE_AS_WIN95 2
552 #define ANNOUNCE_AS_WFW 3
554 /* Macro's to enumerate subnets either with or without
555 the UNICAST subnet. */
557 extern struct subnet_record *subnetlist;
558 extern struct subnet_record *unicast_subnet;
559 extern struct subnet_record *wins_server_subnet;
560 extern struct subnet_record *remote_broadcast_subnet;
562 #define FIRST_SUBNET subnetlist
563 #define NEXT_SUBNET_EXCLUDING_UNICAST(x) ((x)->next)
564 #define NEXT_SUBNET_INCLUDING_UNICAST(x) (get_next_subnet_maybe_unicast((x)))
567 enum state_type { TEST };
568 #endif /* _NAMESERV_H_ */