/[svn]/ircd-hybrid-8/include/client.h
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Revision 1398 - (show annotations)
Sun May 6 10:57:06 2012 UTC (7 years, 5 months ago) by michael
File MIME type: text/x-csrc
File size: 20816 byte(s)
- decrease HOSTIPLEN to 45
- fix some buffers that should use HOSTIPLEN+1

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 *
4 * Copyright (C) 2002 by the past and present ircd coders, and others.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19 * USA
20 */
21
22 /*! \file client.h
23 * \brief Header including structures, macros and prototypes for client handling
24 * \version $Id$
25 */
26
27
28 #ifndef INCLUDED_client_h
29 #define INCLUDED_client_h
30
31 #include "list.h"
32 #include "fdlist.h"
33 #include "config.h"
34 #include "ircd_defs.h"
35 #include "dbuf.h"
36 #include "channel.h"
37
38 #define HOSTIPLEN 45 /* sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") */
39 #define PASSWDLEN 20
40 #define IDLEN 12 /* this is the maximum length, not the actual
41 generated length; DO NOT CHANGE! */
42
43 /*
44 * pre declare structs
45 */
46 struct AccessItem;
47 struct Listener;
48 struct Client;
49 struct LocalUser;
50
51
52
53 /*! \brief addr_mask_type enumeration */
54 enum addr_mask_type
55 {
56 HIDE_IP, /**< IP is hidden. Resolved hostname is shown instead */
57 SHOW_IP, /**< IP is shown. No parts of it are hidden or masked */
58 MASK_IP /**< IP is masked. 255.255.255.255 is shown instead */
59 };
60
61 /*! \brief Server structure */
62 struct Server
63 {
64 dlink_list server_list; /**< Servers on this server */
65 dlink_list client_list; /**< Clients on this server */
66 char by[NICKLEN]; /**< who activated this connection */
67 };
68
69 /*! \brief ListTask structure */
70 struct ListTask
71 {
72 dlink_list show_mask; /**< show these channels.. */
73 dlink_list hide_mask; /**< ..and hide these ones */
74
75 unsigned int hash_index; /**< the bucket we are currently in */
76 unsigned int users_min;
77 unsigned int users_max;
78 unsigned int created_min;
79 unsigned int created_max;
80 unsigned int topicts_min;
81 unsigned int topicts_max;
82 };
83
84 /*! \brief Client structure */
85 struct Client
86 {
87 dlink_node node;
88 dlink_node lnode; /**< Used for Server->servers/users */
89
90 struct LocalUser *localClient;
91 struct Client *hnext; /**< For client hash table lookups by name */
92 struct Client *idhnext; /**< For SID hash table lookups by sid */
93 struct Server *serv; /**< ...defined, if this is a server */
94 struct Client *servptr; /**< Points to server this Client is on */
95 struct Client *from; /**< == self, if Local Client, *NEVER* NULL! */
96 char *away; /**< Client's AWAY message. Can be set/unset via AWAY command */
97
98 time_t tsinfo; /**< TS on the nick, SVINFO on server */
99 time_t servicestamp; /**< Last time client has been identified for its nick */
100
101 unsigned int flags; /**< client flags */
102 unsigned int umodes; /**< opers, normal users subset */
103 unsigned int hopcount; /**< number of servers to this 0 = local */
104 unsigned int status; /**< Client type */
105 unsigned int handler; /**< Handler index */
106
107 dlink_list whowas;
108 dlink_list channel; /**< chain of channel pointer blocks */
109
110 char name[HOSTLEN + 1]; /**< unique name for a client nick or host */
111 char id[IDLEN + 1]; /**< client ID, unique ID per client */
112
113 /*
114 * client->username is the username from ident or the USER message,
115 * If the client is idented the USER message is ignored, otherwise
116 * the username part of the USER message is put here prefixed with a
117 * tilde depending on the auth{} block. Once a client has registered,
118 * this field should be considered read-only.
119 */
120 char username[USERLEN + 1]; /* client's username */
121
122 /*
123 * client->host contains the resolved name or ip address
124 * as a string for the user, it may be fiddled with for oper spoofing etc.
125 * once it's changed the *real* address goes away. This should be
126 * considered a read-only field after the client has registered.
127 */
128 char host[HOSTLEN + 1]; /* client's hostname */
129
130 /*
131 * client->info for unix clients will normally contain the info from the
132 * gcos field in /etc/passwd but anything can go here.
133 */
134 char info[REALLEN + 1]; /* Free form additional client info */
135
136 /*
137 * client->sockhost contains the ip address gotten from the socket as a
138 * string, this field should be considered read-only once the connection
139 * has been made. (set in s_bsd.c only)
140 */
141 char sockhost[HOSTIPLEN + 1]; /* This is the host name from the
142 socket ip address as string */
143 };
144
145 /*! \brief LocalUser structure
146 *
147 * Allocated only for local clients, that are directly connected
148 * to \b this server with a socket.
149 */
150 struct LocalUser
151 {
152 dlink_node lclient_node;
153
154 char client_host[HOSTLEN + 1];
155 char client_server[HOSTLEN + 1];
156
157 unsigned int registration;
158 unsigned int cap_client; /**< Client capabilities (from us) */
159 unsigned int cap_active; /**< Active capabilities (to us) */
160 unsigned int caps; /**< capabilities bit-field */
161
162 unsigned int operflags; /**< IRC Operator privilege flags */
163 unsigned int random_ping; /**< Holding a 32bit value used for PING cookies */
164
165 unsigned int serial; /**< used to enforce 1 send per nick */
166
167 time_t lasttime; /**< ...should be only LOCAL clients? --msa */
168 time_t firsttime; /**< time client was created */
169 time_t since; /**< last time we parsed something */
170 time_t last_knock; /**< time of last knock */
171 time_t last_away; /**< Away since... */
172 time_t last_join_time; /**< when this client last
173 joined a channel */
174 time_t last_leave_time; /**< when this client last
175 * left a channel */
176 int join_leave_count; /**< count of JOIN/LEAVE in less than
177 MIN_JOIN_LEAVE_TIME seconds */
178 int oper_warn_count_down; /**< warn opers of this possible
179 spambot every time this gets to 0 */
180 time_t reject_delay;
181 time_t last_caller_id_time;
182 time_t first_received_message_time;
183 time_t last_nick_change;
184 time_t last_privmsg; /**< Last time we got a PRIVMSG */
185
186 int received_number_of_privmsgs;
187 unsigned int number_of_nick_changes;
188
189 struct ListTask *list_task;
190
191 struct dbuf_queue buf_sendq;
192 struct dbuf_queue buf_recvq;
193
194 struct {
195 unsigned int messages; /**< Statistics: protocol messages sent/received */
196 uint64_t bytes; /**< Statistics: total bytes sent/received */
197 } recv, send;
198
199 struct AuthRequest *auth;
200 struct Listener *listener; /**< listener accepted from */
201 dlink_list acceptlist; /**< clients I'll allow to talk to me */
202 dlink_list watches; /**< chain of Watch pointer blocks */
203 dlink_list confs; /**< Configuration record associated */
204 dlink_list invited; /**< chain of invite pointer blocks */
205 struct irc_ssaddr ip;
206 int aftype; /**< Makes life easier for DNS res in IPV6 */
207
208 char *passwd;
209 fde_t fd;
210
211 /* Anti-flood stuff. We track how many messages were parsed and how
212 * many we were allowed in the current second, and apply a simple
213 * decay to avoid flooding.
214 * -- adrian
215 */
216 int allow_read; /**< how many we're allowed to read in this second */
217 int sent_parsed; /**< how many messages we've parsed in this second */
218
219 char* response; /**< expected response from client */
220 char* auth_oper; /**< Operator to become if they supply the response.*/
221 };
222
223 /*
224 * status macros.
225 */
226 #define STAT_CONNECTING 0x01
227 #define STAT_HANDSHAKE 0x02
228 #define STAT_ME 0x04
229 #define STAT_UNKNOWN 0x08
230 #define STAT_SERVER 0x10
231 #define STAT_CLIENT 0x20
232
233 #define REG_NEED_USER 0x1
234 #define REG_NEED_NICK 0x2
235 #define REG_NEED_CAP 0x4
236 #define REG_INIT (REG_NEED_USER|REG_NEED_NICK)
237
238 #define HasID(x) ((x)->id[0] != '\0')
239 #define ID(x) (HasID(x) ? (x)->id : (x)->name)
240 #define ID_or_name(x,client_p) ((IsCapable(client_p, CAP_TS6) && HasID(x)) ? (x)->id : (x)->name)
241
242 #define IsRegistered(x) ((x)->status > STAT_UNKNOWN)
243 #define IsConnecting(x) ((x)->status == STAT_CONNECTING)
244 #define IsHandshake(x) ((x)->status == STAT_HANDSHAKE)
245 #define IsMe(x) ((x)->status == STAT_ME)
246 #define IsUnknown(x) ((x)->status == STAT_UNKNOWN)
247 #define IsServer(x) ((x)->status == STAT_SERVER)
248 #define IsClient(x) ((x)->status == STAT_CLIENT)
249
250 #define SetConnecting(x) {(x)->status = STAT_CONNECTING; \
251 (x)->handler = UNREGISTERED_HANDLER; }
252
253 #define SetHandshake(x) {(x)->status = STAT_HANDSHAKE; \
254 (x)->handler = UNREGISTERED_HANDLER; }
255
256 #define SetMe(x) {(x)->status = STAT_ME; \
257 (x)->handler = UNREGISTERED_HANDLER; }
258
259 #define SetUnknown(x) {(x)->status = STAT_UNKNOWN; \
260 (x)->handler = UNREGISTERED_HANDLER; }
261
262 #define SetServer(x) {(x)->status = STAT_SERVER; \
263 (x)->handler = SERVER_HANDLER; }
264
265 #define SetClient(x) {(x)->status = STAT_CLIENT; \
266 (x)->handler = HasUMode(x, UMODE_OPER) ? \
267 OPER_HANDLER : CLIENT_HANDLER; }
268
269 #define MyConnect(x) ((x)->localClient != NULL)
270 #define MyClient(x) (MyConnect(x) && IsClient(x))
271
272 /*
273 * ts stuff
274 */
275 #define TS_CURRENT 6 /**< current TS protocol version */
276 #define TS_MIN 5 /**< minimum supported TS protocol version */
277 #define TS_DOESTS 0x20000000
278 #define DoesTS(x) ((x)->tsinfo == TS_DOESTS)
279
280
281
282 #define CAP_MULTI_PREFIX 0x00000001
283
284 #define HasCap(x, y) ((x)->localClient->cap_active & (y))
285
286 /* housekeeping flags */
287 #define FLAGS_PINGSENT 0x00000001 /**< Unreplied ping sent */
288 #define FLAGS_DEADSOCKET 0x00000002 /**< Local socket is dead--Exiting soon */
289 #define FLAGS_KILLED 0x00000004 /**< Prevents "QUIT" from being sent for this */
290 #define FLAGS_CLOSING 0x00000008 /**< set when closing to suppress errors */
291 #define FLAGS_GOTID 0x00000010 /**< successful ident lookup achieved */
292 #define FLAGS_NEEDID 0x00000020 /**< auth{} block say must use ident return */
293 #define FLAGS_SENDQEX 0x00000040 /**< Sendq exceeded */
294 #define FLAGS_IPHASH 0x00000080 /**< iphashed this client */
295 #define FLAGS_MARK 0x00000100 /**< marked client */
296 #define FLAGS_CANFLOOD 0x00000200 /**< client has the ability to flood */
297 #define FLAGS_EXEMPTGLINE 0x00000400 /**< client can't be G-lined */
298 #define FLAGS_EXEMPTKLINE 0x00000800 /**< client is exempt from kline */
299 #define FLAGS_NOLIMIT 0x00001000 /**< client is exempt from limits */
300 #define FLAGS_PING_COOKIE 0x00002000 /**< PING Cookie */
301 #define FLAGS_IP_SPOOFING 0x00004000 /**< client IP is spoofed */
302 #define FLAGS_FLOODDONE 0x00008000 /**< Flood grace period has been ended. */
303 #define FLAGS_EOB 0x00010000 /**< server has sent us an EOB */
304 #define FLAGS_HIDDEN 0x00020000 /**< a hidden server. not shown in /links */
305 #define FLAGS_BLOCKED 0x00040000 /**< must wait for COMM_SELECT_WRITE */
306 #define FLAGS_USERHOST 0x00080000 /**< client is in userhost hash */
307 #define FLAGS_BURSTED 0x00100000 /**< user was already bursted */
308 #define FLAGS_EXEMPTRESV 0x00200000 /**< client is exempt from RESV */
309 #define FLAGS_GOTUSER 0x00400000 /**< if we received a USER command */
310 #define FLAGS_PINGWARNING 0x00800000 /**< unreplied ping warning already sent */
311 #define FLAGS_FINISHED_AUTH 0x01000000 /**< Client has been released from auth */
312 #define FLAGS_FLOOD_NOTICED 0x02000000 /**< Notice to opers about this flooder has been sent */
313 #define FLAGS_SERVICE 0x04000000 /**< Client/server is a network service */
314
315 #define HasFlag(x, y) ((x)->flags & (y))
316 #define AddFlag(x, y) ((x)->flags |= (y))
317 #define DelFlag(x, y) ((x)->flags &= ~(y))
318
319
320
321 /* umodes, settable flags */
322 #define UMODE_SERVNOTICE 0x00000001 /**< server notices such as kill */
323 #define UMODE_CCONN 0x00000002 /**< Client Connections */
324 #define UMODE_REJ 0x00000004 /**< Bot Rejections */
325 #define UMODE_SKILL 0x00000008 /**< Server Killed */
326 #define UMODE_FULL 0x00000010 /**< Full messages */
327 #define UMODE_SPY 0x00000020 /**< see STATS / LINKS */
328 #define UMODE_DEBUG 0x00000040 /**< 'debugging' info */
329 #define UMODE_NCHANGE 0x00000080 /**< Nick change notice */
330 #define UMODE_WALLOP 0x00000100 /**< send wallops to them */
331 #define UMODE_OPERWALL 0x00000200 /**< Operwalls */
332 #define UMODE_INVISIBLE 0x00000400 /**< makes user invisible */
333 #define UMODE_BOTS 0x00000800 /**< shows bots */
334 #define UMODE_EXTERNAL 0x00001000 /**< show servers introduced and splitting */
335 #define UMODE_CALLERID 0x00002000 /**< block unless caller id's */
336 #define UMODE_SOFTCALLERID 0x00004000 /**< block unless on common channel */
337 #define UMODE_UNAUTH 0x00008000 /**< show unauth connects here */
338 #define UMODE_LOCOPS 0x00010000 /**< show locops */
339 #define UMODE_DEAF 0x00020000 /**< don't receive channel messages */
340 #define UMODE_CCONN_FULL 0x00040000 /**< add unused fields to connection monitoring */
341 #define UMODE_REGISTERED 0x00080000 /**< User has identified for that nick. */
342 #define UMODE_REGONLY 0x00100000 /**< Only registered nicks may PM */
343 #define UMODE_HIDDEN 0x00200000 /**< Operator status is hidden */
344 #define UMODE_OPER 0x00400000 /**< Operator */
345 #define UMODE_ADMIN 0x00800000 /**< Admin on server */
346
347 #define UMODE_ALL UMODE_SERVNOTICE
348
349 #define HasUMode(x, y) ((x)->umodes & (y))
350 #define AddUMode(x, y) ((x)->umodes |= (y))
351 #define DelUMode(x, y) ((x)->umodes &= ~(y))
352
353 #define SEND_UMODES (UMODE_INVISIBLE | UMODE_OPER | UMODE_WALLOP | \
354 UMODE_REGISTERED | UMODE_ADMIN | UMODE_HIDDEN)
355
356
357
358 /* oper priv flags */
359 #define OPER_FLAG_GLOBAL_KILL 0x00000001 /**< Oper can global kill */
360 #define OPER_FLAG_REMOTE 0x00000002 /**> Oper can do squits/connects */
361 #define OPER_FLAG_UNKLINE 0x00000004 /**< Oper can use unkline */
362 #define OPER_FLAG_GLINE 0x00000008 /**< Oper can use gline */
363 #define OPER_FLAG_N 0x00000010 /**< Oper can umode n */
364 #define OPER_FLAG_K 0x00000020 /**< Oper can kill/kline */
365 #define OPER_FLAG_X 0x00000040 /**< Oper can xline */
366 #define OPER_FLAG_DIE 0x00000080 /**< Oper can die */
367 #define OPER_FLAG_REHASH 0x00000100 /**< Oper can rehash */
368 #define OPER_FLAG_ADMIN 0x00000200 /**< Oper can set umode +a */
369 #define OPER_FLAG_OPERWALL 0x00000400 /**< Oper can use OPERWALL command */
370 #define OPER_FLAG_OPER_SPY 0x00000800 /* */
371 #define OPER_FLAG_REMOTEBAN 0x00001000 /**< Oper can set remote bans */
372 #define OPER_FLAG_GLOBOPS 0x00002000 /**< Oper can use GLOBOPS command */
373 #define OPER_FLAG_MODULE 0x00004000 /**< Oper can use MODULE commands */
374 #define OPER_FLAG_RESTART 0x00008000 /**< Oper can use RESTART command */
375 #define OPER_FLAG_DLINE 0x00010000 /**< Oper can use DLINE command */
376 #define OPER_FLAG_UNDLINE 0x00020000 /**< Oper can use UNDLINE command */
377
378 #define HasOFlag(x, y) (MyConnect(x) ? (x)->localClient->operflags & (y) : 0)
379 #define AddOFlag(x, y) ((x)->localClient->operflags |= (y))
380 #define DelOFlag(x, y) ((x)->localClient->operflags &= ~(y))
381 #define ClrOFlag(x) ((x)->localClient->operflags = 0)
382
383
384
385 /* flags macros. */
386 #define IsAuthFinished(x) ((x)->flags & FLAGS_FINISHED_AUTH)
387 #define IsDead(x) ((x)->flags & FLAGS_DEADSOCKET)
388 #define SetDead(x) ((x)->flags |= FLAGS_DEADSOCKET)
389 #define IsClosing(x) ((x)->flags & FLAGS_CLOSING)
390 #define SetClosing(x) ((x)->flags |= FLAGS_CLOSING)
391 #define SetCanFlood(x) ((x)->flags |= FLAGS_CANFLOOD)
392 #define IsCanFlood(x) ((x)->flags & FLAGS_CANFLOOD)
393 #define IsDefunct(x) ((x)->flags & (FLAGS_DEADSOCKET|FLAGS_CLOSING| \
394 FLAGS_KILLED))
395
396 /* oper flags */
397 #define MyOper(x) (MyConnect(x) && HasUMode(x, UMODE_OPER))
398
399 #define SetOper(x) {(x)->umodes |= UMODE_OPER; \
400 if (!IsServer((x))) (x)->handler = OPER_HANDLER;}
401
402 #define ClearOper(x) {(x)->umodes &= ~(UMODE_OPER|UMODE_ADMIN); \
403 if (!HasUMode(x, UMODE_OPER) && !IsServer((x))) \
404 (x)->handler = CLIENT_HANDLER; }
405
406 #define SetSendQExceeded(x) ((x)->flags |= FLAGS_SENDQEX)
407 #define IsSendQExceeded(x) ((x)->flags & FLAGS_SENDQEX)
408
409 #define SetIpHash(x) ((x)->flags |= FLAGS_IPHASH)
410 #define ClearIpHash(x) ((x)->flags &= ~FLAGS_IPHASH)
411 #define IsIpHash(x) ((x)->flags & FLAGS_IPHASH)
412
413 #define SetUserHost(x) ((x)->flags |= FLAGS_USERHOST)
414 #define ClearUserHost(x) ((x)->flags &= ~FLAGS_USERHOST)
415 #define IsUserHostIp(x) ((x)->flags & FLAGS_USERHOST)
416
417 #define SetPingSent(x) ((x)->flags |= FLAGS_PINGSENT)
418 #define IsPingSent(x) ((x)->flags & FLAGS_PINGSENT)
419 #define ClearPingSent(x) ((x)->flags &= ~FLAGS_PINGSENT)
420
421 #define SetPingWarning(x) ((x)->flags |= FLAGS_PINGWARNING)
422 #define IsPingWarning(x) ((x)->flags & FLAGS_PINGWARNING)
423 #define ClearPingWarning(x) ((x)->flags &= ~FLAGS_PINGWARNING)
424
425 #define SetNeedId(x) ((x)->flags |= FLAGS_NEEDID)
426 #define IsNeedId(x) ((x)->flags & FLAGS_NEEDID)
427
428 #define SetGotId(x) ((x)->flags |= FLAGS_GOTID)
429 #define IsGotId(x) ((x)->flags & FLAGS_GOTID)
430
431 #define IsExemptKline(x) ((x)->flags & FLAGS_EXEMPTKLINE)
432 #define SetExemptKline(x) ((x)->flags |= FLAGS_EXEMPTKLINE)
433 #define IsExemptLimits(x) ((x)->flags & FLAGS_NOLIMIT)
434 #define SetExemptLimits(x) ((x)->flags |= FLAGS_NOLIMIT)
435 #define IsExemptGline(x) ((x)->flags & FLAGS_EXEMPTGLINE)
436 #define SetExemptGline(x) ((x)->flags |= FLAGS_EXEMPTGLINE)
437 #define IsExemptResv(x) ((x)->flags & FLAGS_EXEMPTRESV)
438 #define SetExemptResv(x) ((x)->flags |= FLAGS_EXEMPTRESV)
439 #define SetIPSpoof(x) ((x)->flags |= FLAGS_IP_SPOOFING)
440 #define IsIPSpoof(x) ((x)->flags & FLAGS_IP_SPOOFING)
441
442 #define IsFloodDone(x) ((x)->flags & FLAGS_FLOODDONE)
443 #define SetFloodDone(x) ((x)->flags |= FLAGS_FLOODDONE)
444 #define HasPingCookie(x) ((x)->flags & FLAGS_PING_COOKIE)
445 #define SetPingCookie(x) ((x)->flags |= FLAGS_PING_COOKIE)
446 #define IsHidden(x) ((x)->flags & FLAGS_HIDDEN)
447 #define SetHidden(x) ((x)->flags |= FLAGS_HIDDEN)
448
449 #define IsSendqBlocked(x) ((x)->flags & FLAGS_BLOCKED)
450 #define SetSendqBlocked(x) ((x)->flags |= FLAGS_BLOCKED)
451 #define ClearSendqBlocked(x) ((x)->flags &= ~FLAGS_BLOCKED)
452
453 #define IsCaptured(x) ((x)->handler == DUMMY_HANDLER)
454 #define SetCaptured(x) ((x)->handler = DUMMY_HANDLER)
455 #define ClearCaptured(x) ((x)->handler = CLIENT_HANDLER)
456
457
458 extern struct Client me;
459 extern dlink_list listing_client_list;
460 extern dlink_list global_client_list;
461
462 extern int accept_message(struct Client *, struct Client *);
463 extern struct split_nuh_item *find_accept(const char *, const char *,
464 const char *, struct Client *, int);
465 extern void del_accept(struct split_nuh_item *, struct Client *);
466 extern void del_all_accepts(struct Client *);
467 extern void exit_client(struct Client *, struct Client *, const char *);
468 extern void check_conf_klines(void);
469 extern void init_client(void);
470 extern void dead_link_on_write(struct Client *, int);
471 extern void dead_link_on_read(struct Client *, int);
472 extern void exit_aborted_clients(void);
473 extern void free_exited_clients(void);
474 extern struct Client *make_client(struct Client *);
475 extern struct Client *find_chasing(struct Client *, struct Client *, const char *, int *);
476 extern struct Client *find_person(const struct Client *const, const char *);
477 extern const char *get_client_name(const struct Client *, enum addr_mask_type);
478
479 #endif /* INCLUDED_client_h */

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