5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2005, 2007 Pekka Riikonen
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.
24 #include "serverconfig.h"
26 /* Context for holding cache information to periodically purge
33 /* Channel key re-key context. */
35 SilcChannelEntry channel;
38 } *SilcServerChannelRekey;
40 /* ID List Entry status flags. */
41 typedef SilcUInt8 SilcIDListStatus;
42 #define SILC_IDLIST_STATUS_NONE 0x00 /* No status */
43 #define SILC_IDLIST_STATUS_REGISTERED 0x01 /* Entry is registered */
44 #define SILC_IDLIST_STATUS_RESOLVED 0x02 /* Entry info is resolved */
45 #define SILC_IDLIST_STATUS_RESOLVING 0x04 /* Entry is being resolved
46 with WHOIS or IDENTIFY */
47 #define SILC_IDLIST_STATUS_DISABLED 0x08 /* Entry is disabled */
48 #define SILC_IDLIST_STATUS_RESUMED 0x10 /* Entry is resumed */
49 #define SILC_IDLIST_STATUS_LOCAL 0x20 /* Entry locally connected */
50 #define SILC_IDLIST_STATUS_RESUME_RES 0x40 /* Entry resolved while
52 #define SILC_IDLIST_STATUS_NOATTR 0x80 /* Entry does not support
53 attributes in WHOIS */
56 Generic ID list data structure.
58 This structure is included in all ID list entries and it includes data
59 pointers that are common to all ID entries. This structure is always
60 defined to the first field in the ID entries and is used to explicitly
61 type cast to this type without first explicitly casting to correct ID
62 entry type. Hence, the ID list entry is type casted to this type to
63 get this data from the ID entry (which is usually opaque pointer).
65 Note that some of the fields may be NULL.
68 struct SilcIDListDataObject {
69 SilcConnectionType conn_type; /* Connection type */
70 SilcServerConnection sconn; /* Connection context */
71 SilcSKERekeyMaterial rekey; /* Rekey material */
75 SilcPublicKey public_key;
76 unsigned char fingerprint[20];
78 long last_receive; /* Time last received data */
79 long last_sent; /* Time last sent data */
81 unsigned long created; /* Time when entry was created */
83 SilcIDListStatus status; /* Status mask of the entry */
87 SILC Server entry object.
89 This entry holds information about servers in SILC network. However,
90 contents of this entry is highly dependent of what kind of server we are
91 (normal server or router server) and whether the entry is used as a local
92 list or a global list. These factors dictates the contents of this entry.
94 This entry is defined as follows:
96 Server type List type Contents
97 =======================================================================
98 server local list Server itself
99 server global list NULL
100 router local list All servers is the cell
101 router global list All servers in the SILC network
103 Following short description of the fields:
105 SilcIDListDataStruct data
107 Generic data structure to hold data common to all ID entries.
111 Logical name of the server. There is no limit of the length of the
112 server name. This is usually the same name as defined in DNS.
114 SilcUInt8 server_type
116 Type of the server. SILC_SERVER or SILC_ROUTER are the possible
121 ID of the server. This includes all the relevant information about
122 the server SILC will ever need. These are also the informations
123 that is broadcasted between servers and routers in the SILC network.
128 Server info (from INFO command) saved temporarily and motd (from
129 MOTD command) saved temporarily.
131 SilcServerEntry router
133 This is a pointer back to the server list. This is the router server
134 where this server is connected to. If this is the router itself and
135 it doesn't have a route this is NULL.
138 SilcCipher receive_key
140 Data sending and receiving keys.
144 A pointer, usually, to the socket list for fast referencing to
145 the data used in connection with this server. This may be anything
146 but as just said, this is usually pointer to the socket connection
150 struct SilcServerEntryStruct {
151 /* Generic data structure. DO NOT add anything before this! */
152 SilcIDListDataStruct data;
155 SilcUInt8 server_type;
160 /* Pointer to the router */
161 SilcServerEntry router;
163 /* Connection data */
167 unsigned int backup : 1; /* Set when executing backup protocol */
171 SILC Channel Client entry structure.
173 This entry used only by the SilcChannelEntry object and it holds
174 information about current clients (ie. users) on channel. Following
175 short description of the fields:
177 SilcClientEntry client
179 Pointer to the client list. This is the client currently on channel.
183 Client's current mode on the channel.
185 SilcChannelEntry channel
187 Back pointer back to channel. As this structure is also used by
188 SilcClientEntry we have this here for fast access to the channel when
189 used by SilcClientEntry.
192 typedef struct SilcChannelClientEntryStruct {
193 SilcClientEntry client;
195 SilcChannelEntry channel;
196 } *SilcChannelClientEntry;
199 SILC Client entry object.
201 This entry holds information about connected clients ie. users in the SILC
202 network. The contents of this entrt is depended on whether we are normal
203 server or router server and whether the list is a local or global list.
205 This entry is defined as follows:
207 Server type List type Contents
208 =======================================================================
209 server local list All clients in server
210 server global list NULL
211 router local list All clients in cell
212 router global list All clients in SILC
214 Following short description of the fields:
216 SilcIDListDataStruct data
218 Generic data structure to hold data common to all ID entries.
220 unsigned char *nickname
222 The nickname of the client. This is nickname in original format,
223 not casefolded or normalized. However, it is checked to assure
224 that prohibited characters do not exist. The casefolded version
229 The name of the server where the client is from. MAy be NULL.
233 Client's usename. This is defined in the following manner:
235 Server type List type Contents
236 ====================================================
237 server local list User's name
238 router local list NULL
239 router global list NULL
241 Router doesn't hold this information since it is not vital data
242 for the router. If this information is needed by the client it is
243 fetched when it is needed.
247 Information about user. This is free information and can be virtually
248 anything. This is defined in following manner:
250 Server type List type Contents
251 ====================================================
252 server local list User's information
253 router local list NULL
254 router global list NULL
256 Router doesn't hold this information since it is not vital data
257 for the router. If this information is needed by the client it is
258 fetched when it is needed.
262 ID of the client. This includes all the information SILC will ever
263 need. Notice that no nickname of the user is saved anywhere. This is
264 beacuse of SilcClientID includes 88 bit hash value of the user's
265 nickname which can be used to track down specific user by their
266 nickname. Nickname is not relevant information that would need to be
271 Client's mode. Client maybe for example server operator or
272 router operator (SILC operator).
276 Time of last time client executed command. We are strict and will
277 not allow any command to be exeucted more than once in about
278 2 seconds. This is result of normal time().
280 SilcUInt8 fast_command
282 Counter to check command bursts. By default, up to 5 commands
283 are allowed before limiting the execution. See command flags
286 SilcServerEntry router
288 This is a pointer to the server list. This is the router server whose
289 cell this client is coming from. This is used to route messages to
292 SilcHashTable channels;
294 All the channels this client has joined. The context saved in the
295 hash table shares memory with the channel entrys `user_list' hash
300 A pointer, usually, to the socket list for fast referencing to
301 the data used in connection with this client. This may be anything
302 but as just said, this is usually pointer to the socket connection
305 SilcUInt16 resolve_cmd_ident
307 Command identifier for the entry when the entry's data.status
308 is SILC_IDLIST_STATUS_RESOLVING. If this entry is asked to be
309 resolved when the status is set then the resolver may attach to
310 this command identifier and handle the process after the resolving
313 SilcClientEntry resuming_client
315 unsigned locally_detached : 1
317 Set to indicate that the client is locally owned but detached for
318 purposes of tracking user counts.
321 struct SilcClientEntryStruct {
322 /* Generic data structure. DO NOT add anything before this! */
323 SilcIDListDataStruct data;
325 unsigned char *nickname;
333 SilcUInt8 fast_command;
335 /* Requested Attributes */
336 unsigned char *attrs;
337 SilcUInt16 attrs_len;
339 /* Pointer to the router */
340 SilcServerEntry router;
342 /* All channels this client has joined */
343 SilcHashTable channels;
345 /* Connection data */
348 /* Last time updated/accessed */
349 unsigned long updated;
351 /* data.status is RESOLVING and this includes the resolving command
353 SilcUInt16 resolve_cmd_ident;
355 /* we need this so nobody can resume more than once at the same time -
356 * server crashes, really odd behaviour, ... */
357 SilcClientEntry resuming_client;
359 /* Client is locally owned but detached and not counted in the user
360 * count for local clients (server->stat.my_clients). */
361 unsigned local_detached : 1;
365 SILC Channel entry object.
367 This entry holds information about channels in SILC network. The contents
368 of this entry is depended on whether we are normal server or router server
369 and whether the list is a local or global list.
371 This entry is defined as follows:
373 Server type List type Contents
374 =======================================================================
375 server local list All channels in server
376 server global list NULL
377 router local list All channels in cell
378 router global list All channels in SILC
380 Following short description of the fields:
384 Logical name of the channel. This is the original format, not
385 the casefolded or normalized. However, this is checked to assure
386 that prohibited characters do not exist. The casefolded version
391 Current mode of the channel. See lib/silccore/silcchannel.h for
396 ID of the channel. This includes all the information SILC will ever
399 SilcBool global_users
401 Boolean value to tell whether there are users outside this server
402 on this channel. This is set to TRUE if router sends message to
403 the server that there are users outside your server on your
404 channel as well. This way server knows that messages needs to be
405 sent to the router for further routing. If this is a normal
406 server and this channel is not created on this server this field
407 is always TRUE. If this server is a router this field is ignored.
411 Current topic of the channel.
415 Default cipher of the channel. If this is NULL then server picks
416 the cipher to be used. This can be set at SILC_COMMAND_JOIN.
420 Default hmac of the channel. If this is NULL then server picks
421 the cipher to be used. This can be set at SILC_COMMAND_JOIN.
423 SilcPublicKey founder_key
425 If the SILC_CMODE_FOUNDER_AUTH has been set then this will include
426 the founder's public key. When the mode and this key is set the
427 channel is also permanent channel and cannot be destroyed.
429 SilcHashTable user_list
431 All users joined on this channel. Note that the context saved to
432 this entry shares memory with the client entrys `channels' hash
435 SilcServerEntry router
437 This is a pointer to the server list. This is the router server
438 whose cell this channel belongs to. This is used to route messages
442 SilcCipher receive_key
444 The key of the channel (the cipher actually).
449 Raw key data of the channel key.
451 unsigned char iv[SILC_CIPHER_MAX_IV_SIZE]
453 Current initial vector. Initial vector is received always along
454 with the channel packet. By default this is filled with NULL.
460 SilcServerChannelRekey rekey
462 Channel key re-key context.
465 struct SilcChannelEntryStruct {
472 SilcPublicKey founder_key;
473 SilcHashTable channel_pubkeys;
475 SilcUInt32 user_limit;
476 unsigned char *passphrase;
477 SilcHashTable invite_list;
478 SilcHashTable ban_list;
480 /* All users on this channel */
481 SilcHashTable user_list;
482 SilcUInt32 user_count;
484 /* Pointer to the router */
485 SilcServerEntry router;
489 SilcCipher receive_key;
494 SilcServerChannelRekey rekey;
495 unsigned long created;
496 unsigned long updated;
499 unsigned int global_users : 1;
500 unsigned int disabled : 1;
501 unsigned int users_resolved : 1;
507 As for remainder these lists are defined as follows:
509 Entry list (cache) Server type List type Contents
510 =======================================================================
511 servers server local list Server itself
512 servers server global list NULL
513 servers router local list All servers in cell
514 servers router global list All servers in SILC
516 clients server local list All clients in server
517 clients server global list NULL
518 clients router local list All clients in cell
519 clients router global list All clients in SILC
521 channels server local list All channels in server
522 channels server global list NULL
523 channels router local list All channels in cell
524 channels router global list All channels in SILC
526 As seen on the list normal server never defines a global list. This is
527 because of normal server don't know anything about anything global data,
528 they get it from the router if and when they need it. Routers, on the
529 other hand, always define local and global lists because routers really
530 know all the relevant data in the SILC network.
532 This object is used as local and global list by the server/router.
533 Above table shows how this is defined on different conditions.
535 This object holds pointers to the ID cache system. Every ID cache entry
536 has a specific context pointer to allocated entry (server, client or
540 struct SilcIDListStruct {
543 SilcIDCache channels;
547 ID Entry for Unknown connections.
549 This is used during authentication phases where we still don't know
550 what kind of connection remote connection is, hence, we will use this
551 structure instead until we know what type of connection remote end is.
553 This is not in any list. This is always individually allocated and
558 /* Generic data structure. DO NOT add anything before this! */
559 SilcIDListDataStruct data;
560 SilcAsyncOperation op;
561 SilcServerConfigRef cconfig;
562 SilcServerConfigRef sconfig;
563 SilcServerConfigRef rconfig;
565 const char *hostname;
568 SilcConnectionType conn_type;
572 void silc_idlist_add_data(void *entry, SilcIDListData idata);
573 void silc_idlist_del_data(void *entry);
574 SILC_TASK_CALLBACK(silc_idlist_purge);
576 silc_idlist_add_server(SilcIDList id_list,
577 char *server_name, int server_type,
578 SilcServerID *id, SilcServerEntry router,
581 silc_idlist_find_server_by_id(SilcIDList id_list, SilcServerID *id,
582 SilcBool registered, SilcIDCacheEntry *ret_entry);
584 silc_idlist_find_server_by_name(SilcIDList id_list, char *name,
585 SilcBool registered, SilcIDCacheEntry *ret_entry);
587 silc_idlist_find_server_by_conn(SilcIDList id_list, char *hostname,
588 int port, SilcBool registered,
589 SilcIDCacheEntry *ret_entry);
591 silc_idlist_replace_server_id(SilcIDList id_list, SilcServerID *old_id,
592 SilcServerID *new_id);
593 int silc_idlist_del_server(SilcIDList id_list, SilcServerEntry entry);
594 void silc_idlist_server_destructor(SilcIDCache cache,
595 SilcIDCacheEntry entry,
599 silc_idlist_add_client(SilcIDList id_list, char *nickname, char *username,
600 char *userinfo, SilcClientID *id,
601 SilcServerEntry router, void *connection);
602 int silc_idlist_del_client(SilcIDList id_list, SilcClientEntry entry);
603 int silc_idlist_get_clients_by_nickname(SilcIDList id_list, char *nickname,
605 SilcClientEntry **clients,
606 SilcUInt32 *clients_count);
607 int silc_idlist_get_clients_by_hash(SilcIDList id_list,
608 char *nickname, char *server,
610 SilcClientEntry **clients,
611 SilcUInt32 *clients_count);
613 silc_idlist_find_client_by_id(SilcIDList id_list, SilcClientID *id,
614 SilcBool registered, SilcIDCacheEntry *ret_entry);
616 silc_idlist_replace_client_id(SilcServer server,
617 SilcIDList id_list, SilcClientID *old_id,
618 SilcClientID *new_id, const char *nickname);
619 void silc_idlist_client_destructor(SilcIDCache cache,
620 SilcIDCacheEntry entry,
624 silc_idlist_add_channel(SilcIDList id_list, char *channel_name, int mode,
625 SilcChannelID *id, SilcServerEntry router,
626 SilcCipher send_key, SilcCipher receive_key,
628 void silc_idlist_channel_destructor(SilcIDCache cache,
629 SilcIDCacheEntry entry,
632 int silc_idlist_del_channel(SilcIDList id_list, SilcChannelEntry entry);
634 silc_idlist_find_channel_by_name(SilcIDList id_list, char *name,
635 SilcIDCacheEntry *ret_entry);
637 silc_idlist_find_channel_by_id(SilcIDList id_list, SilcChannelID *id,
638 SilcIDCacheEntry *ret_entry);
640 silc_idlist_replace_channel_id(SilcIDList id_list, SilcChannelID *old_id,
641 SilcChannelID *new_id);
643 silc_idlist_get_channels(SilcIDList id_list, SilcChannelID *channel_id,
644 SilcUInt32 *channels_count);