/[svn]/ircd-hybrid-7.2/src/s_user.c
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Contents of /ircd-hybrid-7.2/src/s_user.c

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Revision 507 - (show annotations)
Sat Mar 4 08:20:28 2006 UTC (16 years, 5 months ago) by michael
File MIME type: text/x-chdr
File size: 43007 byte(s)
- Removed some outdated XXX comments

1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * s_user.c: User related functions.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "tools.h"
27 #include "s_user.h"
28 #include "s_misc.h"
29 #include "channel.h"
30 #include "channel_mode.h"
31 #include "client.h"
32 #include "common.h"
33 #include "fdlist.h"
34 #include "hash.h"
35 #include "irc_string.h"
36 #include "sprintf_irc.h"
37 #include "s_bsd.h"
38 #include "irc_getnameinfo.h"
39 #include "ircd.h"
40 #include "list.h"
41 #include "listener.h"
42 #include "motd.h"
43 #include "numeric.h"
44 #include "s_conf.h"
45 #include "s_log.h"
46 #include "s_serv.h"
47 #include "s_stats.h"
48 #include "send.h"
49 #include "supported.h"
50 #include "whowas.h"
51 #include "memory.h"
52 #include "packet.h"
53 #include "userhost.h"
54 #include "hook.h"
55 #include "s_misc.h"
56 #include "msg.h"
57 #include "pcre.h"
58
59 int MaxClientCount = 1;
60 int MaxConnectionCount = 1;
61 struct Callback *entering_umode_cb = NULL;
62 struct Callback *umode_cb = NULL;
63 struct Callback *uid_get_cb = NULL;
64
65 static char umode_buffer[IRCD_BUFSIZE];
66
67 static void user_welcome(struct Client *);
68 static void report_and_set_user_flags(struct Client *, const struct AccessItem *);
69 static int check_xline(struct Client *);
70 static int check_regexp_xline(struct Client *);
71 static void introduce_client(struct Client *, struct Client *);
72 static void *uid_get(va_list);
73
74 /* Used for building up the isupport string,
75 * used with init_isupport, add_isupport, delete_isupport
76 */
77
78 struct Isupport
79 {
80 dlink_node node;
81 char *name;
82 char *options;
83 int number;
84 };
85
86 static dlink_list support_list = { NULL, NULL, 0 };
87 MessageFile *isupportFile;
88
89 /* memory is cheap. map 0-255 to equivalent mode */
90 unsigned int user_modes[256] =
91 {
92 /* 0x00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x0F */
93 /* 0x10 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1F */
94 /* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2F */
95 /* 0x30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x3F */
96 0, /* @ */
97 0, /* A */
98 0, /* B */
99 0, /* C */
100 UMODE_DEAF, /* D */
101 0, /* E */
102 0, /* F */
103 UMODE_SOFTCALLERID, /* G */
104 0, /* H */
105 0, /* I */
106 0, /* J */
107 0, /* K */
108 0, /* L */
109 0, /* M */
110 0, /* N */
111 0, /* O */
112 0, /* P */
113 0, /* Q */
114 0, /* R */
115 0, /* S */
116 0, /* T */
117 0, /* U */
118 0, /* V */
119 0, /* W */
120 0, /* X */
121 0, /* Y */
122 0, /* Z 0x5A */
123 0, 0, 0, 0, 0, /* 0x5F */
124 0, /* 0x60 */
125 UMODE_ADMIN, /* a */
126 UMODE_BOTS, /* b */
127 UMODE_CCONN, /* c */
128 UMODE_DEBUG, /* d */
129 0, /* e */
130 UMODE_FULL, /* f */
131 UMODE_CALLERID, /* g */
132 0, /* h */
133 UMODE_INVISIBLE, /* i */
134 0, /* j */
135 UMODE_SKILL, /* k */
136 UMODE_LOCOPS, /* l */
137 0, /* m */
138 UMODE_NCHANGE, /* n */
139 UMODE_OPER, /* o */
140 0, /* p */
141 0, /* q */
142 UMODE_REJ, /* r */
143 UMODE_SERVNOTICE, /* s */
144 0, /* t */
145 UMODE_UNAUTH, /* u */
146 0, /* v */
147 UMODE_WALLOP, /* w */
148 UMODE_EXTERNAL, /* x */
149 UMODE_SPY, /* y */
150 UMODE_OPERWALL, /* z 0x7A */
151 0,0,0,0,0, /* 0x7B - 0x7F */
152
153 /* 0x80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x8F */
154 /* 0x90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x9F */
155 /* 0xA0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xAF */
156 /* 0xB0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xBF */
157 /* 0xC0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xCF */
158 /* 0xD0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xDF */
159 /* 0xE0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xEF */
160 /* 0xF0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* 0xFF */
161 };
162
163 void
164 assemble_umode_buffer(void)
165 {
166 unsigned int idx = 0;
167 char *umode_buffer_ptr = umode_buffer;
168
169 for (; idx < (sizeof(user_modes) / sizeof(int)); ++idx)
170 if (user_modes[idx])
171 *umode_buffer_ptr++ = idx;
172
173 *umode_buffer_ptr = '\0';
174 }
175
176 /* show_lusers()
177 *
178 * inputs - pointer to client
179 * output - NONE
180 * side effects - display to client user counts etc.
181 */
182 void
183 show_lusers(struct Client *source_p)
184 {
185 const char *from, *to;
186
187 if (!MyConnect(source_p) && IsCapable(source_p->from, CAP_TS6) && HasID(source_p))
188 {
189 from = me.id;
190 to = source_p->id;
191 }
192 else
193 {
194 from = me.name;
195 to = source_p->name;
196 }
197
198 if (!ConfigServerHide.hide_servers || IsOper(source_p))
199 sendto_one(source_p, form_str(RPL_LUSERCLIENT),
200 from, to, (Count.total-Count.invisi),
201 Count.invisi, dlink_list_length(&global_serv_list));
202 else
203 sendto_one(source_p, form_str(RPL_LUSERCLIENT), from, to,
204 (Count.total-Count.invisi), Count.invisi, 1);
205
206 if (Count.oper > 0)
207 sendto_one(source_p, form_str(RPL_LUSEROP),
208 from, to, Count.oper);
209
210 if (dlink_list_length(&unknown_list) > 0)
211 sendto_one(source_p, form_str(RPL_LUSERUNKNOWN),
212 from, to, dlink_list_length(&unknown_list));
213
214 if (dlink_list_length(&global_channel_list) > 0)
215 sendto_one(source_p, form_str(RPL_LUSERCHANNELS),
216 from, to, dlink_list_length(&global_channel_list));
217
218 if (!ConfigServerHide.hide_servers || IsOper(source_p))
219 {
220 sendto_one(source_p, form_str(RPL_LUSERME),
221 from, to, Count.local, Count.myserver);
222 sendto_one(source_p, form_str(RPL_LOCALUSERS),
223 from, to, Count.local, Count.max_loc,
224 Count.local, Count.max_loc);
225 }
226 else
227 {
228 sendto_one(source_p, form_str(RPL_LUSERME),
229 from, to, Count.total, 0);
230 sendto_one(source_p, form_str(RPL_LOCALUSERS),
231 from, to, Count.total, Count.max_tot,
232 Count.total, Count.max_tot);
233 }
234
235 sendto_one(source_p, form_str(RPL_GLOBALUSERS),
236 from, to, Count.total, Count.max_tot,
237 Count.total, Count.max_tot);
238
239 if (!ConfigServerHide.hide_servers || IsOper(source_p))
240 sendto_one(source_p, form_str(RPL_STATSCONN), from, to,
241 MaxConnectionCount, MaxClientCount, Count.totalrestartcount);
242
243 if (Count.local > MaxClientCount)
244 MaxClientCount = Count.local;
245
246 if ((Count.local + Count.myserver) > MaxConnectionCount)
247 MaxConnectionCount = Count.local + Count.myserver;
248 }
249
250 /* show_isupport()
251 *
252 * inputs - pointer to client
253 * output - NONE
254 * side effects - display to client what we support (for them)
255 */
256 void
257 show_isupport(struct Client *source_p)
258 {
259 send_message_file(source_p, isupportFile);
260 }
261
262 /*
263 ** register_local_user
264 ** This function is called when both NICK and USER messages
265 ** have been accepted for the client, in whatever order. Only
266 ** after this, is the USER message propagated.
267 **
268 ** NICK's must be propagated at once when received, although
269 ** it would be better to delay them too until full info is
270 ** available. Doing it is not so simple though, would have
271 ** to implement the following:
272 **
273 ** (actually it has been implemented already for a while) -orabidoo
274 **
275 ** 1) user telnets in and gives only "NICK foobar" and waits
276 ** 2) another user far away logs in normally with the nick
277 ** "foobar" (quite legal, as this server didn't propagate
278 ** it).
279 ** 3) now this server gets nick "foobar" from outside, but
280 ** has alread the same defined locally. Current server
281 ** would just issue "KILL foobar" to clean out dups. But,
282 ** this is not fair. It should actually request another
283 ** nick from local user or kill him/her...
284 */
285 void
286 register_local_user(struct Client *client_p, struct Client *source_p,
287 const char *nick, const char *username)
288 {
289 const struct AccessItem *aconf = NULL;
290 char ipaddr[HOSTIPLEN];
291 dlink_node *ptr = NULL;
292 dlink_node *m = NULL;
293
294 assert(source_p != NULL);
295 assert(MyConnect(source_p));
296 assert(source_p->username != username);
297 assert(!source_p->localClient->registration);
298
299 if (ConfigFileEntry.ping_cookie)
300 {
301 if (!IsPingSent(source_p) &&
302 source_p->localClient->random_ping == 0)
303 {
304 source_p->localClient->random_ping = (unsigned long)rand();
305 sendto_one(source_p, "PING :%lu",
306 source_p->localClient->random_ping);
307 SetPingSent(source_p);
308 return;
309 }
310
311 if (!HasPingCookie(source_p))
312 return;
313 }
314
315 source_p->localClient->last = CurrentTime;
316 /* Straight up the maximum rate of flooding... */
317 source_p->localClient->allow_read = MAX_FLOOD_BURST;
318
319 if (!execute_callback(client_check_cb, source_p, username))
320 return;
321
322 if (valid_hostname(source_p->host) == 0)
323 {
324 sendto_one(source_p, ":%s NOTICE %s :*** Notice -- You have an illegal "
325 "character in your hostname", me.name, source_p->name);
326 strlcpy(source_p->host, source_p->sockhost,
327 sizeof(source_p->host));
328 }
329
330 ptr = source_p->localClient->confs.head;
331 aconf = map_to_conf(ptr->data);
332
333 if (!IsGotId(source_p))
334 {
335 const char *p = NULL;
336 unsigned int i = 0;
337
338 if (IsNeedIdentd(aconf))
339 {
340 ServerStats->is_ref++;
341 sendto_one(source_p, ":%s NOTICE %s :*** Notice -- You need to install "
342 "identd to use this server", me.name, source_p->name);
343 exit_client(source_p, &me, "Install identd");
344 return;
345 }
346
347 p = username;
348
349 if (!IsNoTilde(aconf))
350 source_p->username[i++] = '~';
351
352 while (*p && i < USERLEN)
353 {
354 if (*p != '[')
355 source_p->username[i++] = *p;
356 p++;
357 }
358
359 source_p->username[i] = '\0';
360 }
361
362 /* password check */
363 if (!EmptyString(aconf->passwd))
364 {
365 const char *pass = source_p->localClient->passwd;
366
367 if (!match_conf_password(pass, aconf))
368 {
369 ServerStats->is_ref++;
370 sendto_one(source_p, form_str(ERR_PASSWDMISMATCH),
371 me.name, source_p->name);
372 exit_client(source_p, &me, "Bad Password");
373 return;
374 }
375 }
376
377 /* don't free source_p->localClient->passwd here - it can be required
378 * by masked /stats I if there are auth{} blocks with need_password = no;
379 * --adx
380 */
381
382 /* report if user has &^>= etc. and set flags as needed in source_p */
383 report_and_set_user_flags(source_p, aconf);
384
385 /* Limit clients -
386 * We want to be able to have servers and F-line clients
387 * connect, so save room for "buffer" connections.
388 * Smaller servers may want to decrease this, and it should
389 * probably be just a percentage of the MAXCLIENTS...
390 * -Taner
391 */
392 /* Except "F:" clients */
393 if ((Count.local >= ServerInfo.max_clients + MAX_BUFFER) ||
394 (Count.local >= ServerInfo.max_clients && !IsExemptLimits(source_p)))
395 {
396 sendto_realops_flags(UMODE_FULL, L_ALL,
397 "Too many clients, rejecting %s[%s].",
398 nick, source_p->host);
399 ServerStats->is_ref++;
400 exit_client(source_p, &me, "Sorry, server is full - try later");
401 return;
402 }
403
404 /* valid user name check */
405 if (valid_username(source_p->username) == 0)
406 {
407 char tmpstr2[IRCD_BUFSIZE];
408
409 sendto_realops_flags(UMODE_REJ, L_ALL, "Invalid username: %s (%s@%s)",
410 nick, source_p->username, source_p->host);
411 ServerStats->is_ref++;
412 ircsprintf(tmpstr2, "Invalid username [%s]", source_p->username);
413 exit_client(source_p, &me, tmpstr2);
414 return;
415 }
416
417 assert(source_p == client_p);
418
419 /* end of valid user name check */
420 if (check_xline(source_p) || check_regexp_xline(source_p))
421 return;
422
423 if (IsDead(client_p))
424 return;
425
426 if (source_p->id[0] == '\0' && me.id[0])
427 {
428 char *id = (char *)execute_callback(uid_get_cb, source_p);
429 while (hash_find_id(id) != NULL)
430 id = uid_get(NULL);
431
432 strlcpy(source_p->id, id, sizeof(source_p->id));
433 hash_add_id(source_p);
434 }
435
436 irc_getnameinfo((struct sockaddr *)&source_p->localClient->ip,
437 source_p->localClient->ip.ss_len, ipaddr,
438 HOSTIPLEN, NULL, 0, NI_NUMERICHOST);
439
440 sendto_realops_flags(UMODE_CCONN, L_ALL,
441 "Client connecting: %s (%s@%s) [%s] {%s} [%s]",
442 nick, source_p->username, source_p->host,
443 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
444 "255.255.255.255" : ipaddr, get_client_class(source_p),
445 source_p->info);
446
447 /* If they have died in send_* don't do anything. */
448 if (IsDead(source_p))
449 return;
450
451 if (ConfigFileEntry.invisible_on_connect)
452 {
453 source_p->umodes |= UMODE_INVISIBLE;
454 Count.invisi++;
455 }
456
457 if ((++Count.local) > Count.max_loc)
458 {
459 Count.max_loc = Count.local;
460
461 if (!(Count.max_loc % 10))
462 sendto_realops_flags(UMODE_ALL, L_ALL, "New Max Local Clients: %d",
463 Count.max_loc);
464 }
465
466 SetClient(source_p);
467
468 source_p->servptr = &me;
469 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
470
471 /* Increment our total user count here */
472 if (++Count.total > Count.max_tot)
473 Count.max_tot = Count.total;
474 Count.totalrestartcount++;
475
476 source_p->localClient->allow_read = MAX_FLOOD_BURST;
477
478 if ((m = dlinkFindDelete(&unknown_list, source_p)) != NULL)
479 {
480 free_dlink_node(m);
481 dlinkAdd(source_p, &source_p->localClient->lclient_node, &local_client_list);
482 }
483 else assert(0);
484
485 user_welcome(source_p);
486 add_user_host(source_p->username, source_p->host, 0);
487 SetUserHost(source_p);
488
489 introduce_client(client_p, source_p);
490 }
491
492 /* register_remote_user()
493 *
494 * inputs - client_p directly connected client
495 * - source_p remote or directly connected client
496 * - username to register as
497 * - host name to register as
498 * - server name
499 * - realname (gecos)
500 * output - NONE
501 * side effects - This function is called when a remote client
502 * is introduced by a server.
503 */
504 void
505 register_remote_user(struct Client *client_p, struct Client *source_p,
506 const char *username, const char *host, const char *server,
507 const char *realname)
508 {
509 struct Client *target_p = NULL;
510
511 assert(source_p != NULL);
512 assert(source_p->username != username);
513
514 strlcpy(source_p->host, host, sizeof(source_p->host));
515 strlcpy(source_p->info, realname, sizeof(source_p->info));
516 strlcpy(source_p->username, username, sizeof(source_p->username));
517
518 /* Increment our total user count here */
519 if (++Count.total > Count.max_tot)
520 Count.max_tot = Count.total;
521
522 source_p->from->serv->dep_users++;
523
524 /*
525 * coming from another server, take the servers word for it
526 */
527 source_p->servptr = find_server(server);
528
529 /* Super GhostDetect:
530 * If we can't find the server the user is supposed to be on,
531 * then simply blow the user away. -Taner
532 */
533 if (source_p->servptr == NULL)
534 {
535 sendto_realops_flags(UMODE_ALL, L_ALL,
536 "No server %s for user %s[%s@%s] from %s",
537 server, source_p->name, source_p->username,
538 source_p->host, source_p->from->name);
539 kill_client(client_p, source_p, "%s (Server doesn't exist)", me.name);
540
541 SetKilled(source_p);
542 exit_client(source_p, &me, "Ghosted Client");
543 return;
544 }
545
546 if ((target_p = source_p->servptr) && target_p->from != source_p->from)
547 {
548 sendto_realops_flags(UMODE_DEBUG, L_ALL,
549 "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
550 client_p->name, source_p->name, source_p->username,
551 source_p->host, source_p->servptr->name,
552 target_p->name, target_p->from->name);
553 kill_client(client_p, source_p,
554 "%s (NICK from wrong direction (%s != %s))",
555 me.name, source_p->servptr->name, target_p->from->name);
556 SetKilled(source_p);
557 exit_client(source_p, &me, "USER server wrong direction");
558 return;
559 }
560
561 SetClient(source_p);
562 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
563 add_user_host(source_p->username, source_p->host, 1);
564 SetUserHost(source_p);
565
566 introduce_client(client_p, source_p);
567 }
568
569 /* introduce_client()
570 *
571 * inputs - client_p
572 * - source_p
573 * output - NONE
574 * side effects - This common function introduces a client to the rest
575 * of the net, either from a local client connect or
576 * from a remote connect.
577 */
578 static void
579 introduce_client(struct Client *client_p, struct Client *source_p)
580 {
581 dlink_node *server_node = NULL;
582 static char ubuf[12];
583
584 if (MyClient(source_p))
585 send_umode(source_p, source_p, 0, SEND_UMODES, ubuf);
586 else
587 send_umode(NULL, source_p, 0, SEND_UMODES, ubuf);
588
589 if (*ubuf == '\0')
590 {
591 ubuf[0] = '+';
592 ubuf[1] = '\0';
593 }
594
595 /* arghhh one could try not introducing new nicks to ll leafs
596 * but then you have to introduce them "on the fly" in SJOIN
597 * not fun.
598 * Its not going to cost much more bandwidth to simply let new
599 * nicks just ride on through.
600 */
601
602 /* We now introduce nicks "on the fly" in SJOIN anyway --
603 * you _need_ to if you aren't going to burst everyone initially.
604 *
605 * Only send to non CAP_LL servers, unless we're a lazylink leaf,
606 * in that case just send it to the uplink.
607 * -davidt
608 * rewritten to cope with SIDs .. eww eww eww --is
609 */
610 if (!ServerInfo.hub && uplink && IsCapable(uplink, CAP_LL) &&
611 client_p != uplink)
612 {
613 if (IsCapable(uplink, CAP_TS6) && HasID(source_p))
614 {
615 sendto_one(uplink, ":%s UID %s %d %lu %s %s %s %s %s :%s",
616 source_p->servptr->id,
617 source_p->name, source_p->hopcount+1,
618 (unsigned long)source_p->tsinfo,
619 ubuf, source_p->username, source_p->host,
620 (MyClient(source_p) && IsIPSpoof(source_p)) ?
621 "0" : source_p->sockhost, source_p->id, source_p->info);
622 }
623 else
624 {
625 sendto_one(uplink, "NICK %s %d %lu %s %s %s %s :%s",
626 source_p->name, source_p->hopcount+1,
627 (unsigned long)source_p->tsinfo,
628 ubuf, source_p->username, source_p->host,
629 source_p->servptr->name, source_p->info);
630 }
631 }
632 else
633 {
634 DLINK_FOREACH(server_node, serv_list.head)
635 {
636 struct Client *server = server_node->data;
637
638 if (IsCapable(server, CAP_LL) || server == client_p)
639 continue;
640
641 if (IsCapable(server, CAP_TS6) && HasID(source_p))
642 sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s",
643 source_p->servptr->id,
644 source_p->name, source_p->hopcount+1,
645 (unsigned long)source_p->tsinfo,
646 ubuf, source_p->username, source_p->host,
647 (MyClient(source_p) && IsIPSpoof(source_p)) ?
648 "0" : source_p->sockhost, source_p->id, source_p->info);
649 else
650 sendto_one(server, "NICK %s %d %lu %s %s %s %s :%s",
651 source_p->name, source_p->hopcount+1,
652 (unsigned long)source_p->tsinfo,
653 ubuf, source_p->username, source_p->host,
654 source_p->servptr->name, source_p->info);
655 }
656 }
657 }
658
659 /* valid_hostname()
660 *
661 * Inputs - pointer to hostname
662 * Output - 1 if valid, 0 if not
663 * Side effects - check hostname for validity
664 *
665 * NOTE: this doesn't allow a hostname to begin with a dot and
666 * will not allow more dots than chars.
667 */
668 int
669 valid_hostname(const char *hostname)
670 {
671 const char *p = hostname;
672
673 assert(p != NULL);
674
675 if ('.' == *p || ':' == *p)
676 return 0;
677
678 while (*p)
679 {
680 if (!IsHostChar(*p))
681 return 0;
682 p++;
683 }
684
685 return 1;
686 }
687
688 /* valid_username()
689 *
690 * Inputs - pointer to user
691 * Output - 1 if valid, 0 if not
692 * Side effects - check username for validity
693 *
694 * Absolutely always reject any '*' '!' '?' '@' in an user name
695 * reject any odd control characters names.
696 * Allow '.' in username to allow for "first.last"
697 * style of username
698 */
699 int
700 valid_username(const char *username)
701 {
702 int dots = 0;
703 const char *p = username;
704
705 assert(p != NULL);
706
707 if ('~' == *p)
708 ++p;
709
710 /* reject usernames that don't start with an alphanum
711 * i.e. reject jokers who have '-@somehost' or '.@somehost'
712 * or "-hi-@somehost", "h-----@somehost" would still be accepted.
713 */
714 if (!IsAlNum(*p))
715 return 0;
716
717 while (*++p)
718 {
719 if ((*p == '.') && ConfigFileEntry.dots_in_ident)
720 {
721 dots++;
722
723 if (dots > ConfigFileEntry.dots_in_ident)
724 return 0;
725 if (!IsUserChar(p[1]))
726 return 0;
727 }
728 else if (!IsUserChar(*p))
729 return 0;
730 }
731
732 return 1;
733 }
734
735 /* report_and_set_user_flags()
736 *
737 * inputs - pointer to source_p
738 * - pointer to aconf for this user
739 * output - NONE
740 * side effects - Report to user any special flags
741 * they are getting, and set them.
742 */
743 static void
744 report_and_set_user_flags(struct Client *source_p, const struct AccessItem *aconf)
745 {
746 /* If this user is being spoofed, tell them so */
747 if (IsConfDoSpoofIp(aconf))
748 {
749 sendto_one(source_p,
750 ":%s NOTICE %s :*** Spoofing your IP. congrats.",
751 me.name, source_p->name);
752 }
753
754 /* If this user is in the exception class, Set it "E lined" */
755 if (IsConfExemptKline(aconf))
756 {
757 SetExemptKline(source_p);
758 sendto_one(source_p,
759 ":%s NOTICE %s :*** You are exempt from K/D/G lines. congrats.",
760 me.name, source_p->name);
761 }
762
763 /* The else here is to make sure that G line exempt users
764 * do not get noticed twice.
765 */
766 else if (IsConfExemptGline(aconf))
767 {
768 SetExemptGline(source_p);
769 sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from G lines.",
770 me.name, source_p->name);
771 }
772
773 if (IsConfExemptResv(aconf))
774 {
775 SetExemptResv(source_p);
776 sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from resvs.",
777 me.name, source_p->name);
778 }
779
780 /* If this user is exempt from user limits set it "F lined" */
781 if (IsConfExemptLimits(aconf))
782 {
783 SetExemptLimits(source_p);
784 sendto_one(source_p,
785 ":%s NOTICE %s :*** You are exempt from user limits. congrats.",
786 me.name,source_p->name);
787 }
788
789 /* If this user is exempt from idle time outs */
790 if (IsConfIdlelined(aconf))
791 {
792 SetIdlelined(source_p);
793 sendto_one(source_p,
794 ":%s NOTICE %s :*** You are exempt from idle limits. congrats.",
795 me.name, source_p->name);
796 }
797
798 if (IsConfCanFlood(aconf))
799 {
800 SetCanFlood(source_p);
801 sendto_one(source_p, ":%s NOTICE %s :*** You are exempt from flood "
802 "protection, aren't you fearsome.",
803 me.name, source_p->name);
804 }
805 }
806
807 /* do_local_user()
808 *
809 * inputs -
810 * output - NONE
811 * side effects -
812 */
813 void
814 do_local_user(const char *nick, struct Client *client_p, struct Client *source_p,
815 const char *username, const char *host, const char *server,
816 const char *realname)
817 {
818 assert(source_p != NULL);
819 assert(source_p->username != username);
820
821 if (source_p == NULL)
822 return;
823
824 if (!IsUnknown(source_p))
825 {
826 sendto_one(source_p, form_str(ERR_ALREADYREGISTRED),
827 me.name, nick);
828 return;
829 }
830
831 source_p->localClient->registration &= ~REG_NEED_USER;
832
833 /*
834 * don't take the clients word for it, ever
835 */
836 source_p->servptr = &me;
837
838 strlcpy(source_p->info, realname, sizeof(source_p->info));
839
840 if (!IsGotId(source_p))
841 {
842 /* save the username in the client
843 * If you move this you'll break ping cookies..you've been warned
844 */
845 strlcpy(source_p->username, username, sizeof(source_p->username));
846 }
847
848 if (!source_p->localClient->registration)
849 /* NICK already received, now I have USER... */
850 register_local_user(client_p, source_p, source_p->name, username);
851 }
852
853 /* change_simple_umode()
854 *
855 * this callback can be hooked to allow special handling of
856 * certain usermodes
857 */
858 static void *
859 change_simple_umode(va_list args)
860 {
861 struct Client *source_p;
862 int what;
863 unsigned int flag;
864
865 va_arg(args, struct Client *);
866 source_p = va_arg(args, struct Client *);
867 what = va_arg(args, int);
868 flag = va_arg(args, unsigned int);
869
870 if (what == MODE_ADD)
871 source_p->umodes |= flag;
872 else
873 source_p->umodes &= ~flag;
874
875 return NULL;
876 }
877
878 /* set_user_mode()
879 *
880 * added 15/10/91 By Darren Reed.
881 * parv[0] - sender
882 * parv[1] - username to change mode for
883 * parv[2] - modes to change
884 */
885 void
886 set_user_mode(struct Client *client_p, struct Client *source_p,
887 int parc, char *parv[])
888 {
889 unsigned int flag, setflags;
890 char **p, *m, buf[IRCD_BUFSIZE];
891 struct Client *target_p;
892 int what = MODE_ADD, badflag = 0, i;
893
894 assert(!(parc < 2));
895
896 if ((target_p = find_person(client_p, parv[1])) == NULL)
897 {
898 if (MyConnect(source_p))
899 sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
900 me.name, source_p->name, parv[1]);
901 return;
902 }
903
904 if (IsServer(source_p))
905 {
906 sendto_realops_flags(UMODE_ALL, L_ADMIN, "*** Mode for User %s from %s",
907 parv[1], source_p->name);
908 return;
909 }
910
911 if (source_p != target_p || target_p->from != source_p->from)
912 {
913 sendto_one(source_p, form_str(ERR_USERSDONTMATCH),
914 me.name, source_p->name);
915 return;
916 }
917
918 if (parc < 3)
919 {
920 m = buf;
921 *m++ = '+';
922
923 for (i = 0; i < 128; i++)
924 if (source_p->umodes & user_modes[i])
925 *m++ = (char)i;
926 *m = '\0';
927
928 sendto_one(source_p, form_str(RPL_UMODEIS),
929 me.name, source_p->name, buf);
930 return;
931 }
932
933 execute_callback(entering_umode_cb, client_p, source_p);
934
935 /* find flags already set for user */
936 setflags = source_p->umodes;
937
938 /* parse mode change string(s) */
939 for (p = &parv[2]; p && *p; p++)
940 {
941 for (m = *p; *m; m++)
942 {
943 switch (*m)
944 {
945 case '+':
946 what = MODE_ADD;
947 break;
948 case '-':
949 what = MODE_DEL;
950 break;
951 case 'o':
952 if (what == MODE_ADD)
953 {
954 if (IsServer(client_p) && !IsOper(source_p))
955 {
956 ++Count.oper;
957 SetOper(source_p);
958 }
959 }
960 else
961 {
962 /* Only decrement the oper counts if an oper to begin with
963 * found by Pat Szuta, Perly , perly@xnet.com
964 */
965 if (!IsOper(source_p))
966 break;
967
968 ClearOper(source_p);
969 source_p->umodes &= ~ConfigFileEntry.oper_only_umodes;
970 Count.oper--;
971
972 if (MyConnect(source_p))
973 {
974 dlink_node *dm;
975
976 detach_conf(source_p, OPER_TYPE);
977 ClearOperFlags(source_p);
978
979 if ((dm = dlinkFindDelete(&oper_list, source_p)) != NULL)
980 free_dlink_node(dm);
981 }
982 }
983
984 break;
985
986 /* we may not get these,
987 * but they shouldnt be in default
988 */
989 case ' ' :
990 case '\n':
991 case '\r':
992 case '\t':
993 break;
994
995 default:
996 if ((flag = user_modes[(unsigned char)*m]))
997 {
998 if (MyConnect(source_p) && !IsOper(source_p) &&
999 (ConfigFileEntry.oper_only_umodes & flag))
1000 {
1001 badflag = 1;
1002 }
1003 else
1004 execute_callback(umode_cb, client_p, source_p, what, flag);
1005 }
1006 else
1007 {
1008 if (MyConnect(source_p))
1009 badflag = 1;
1010 }
1011
1012 break;
1013 }
1014 }
1015 }
1016
1017 if (badflag)
1018 sendto_one(source_p, form_str(ERR_UMODEUNKNOWNFLAG),
1019 me.name, source_p->name);
1020
1021 if ((source_p->umodes & UMODE_NCHANGE) && !IsOperN(source_p))
1022 {
1023 sendto_one(source_p, ":%s NOTICE %s :*** You have no admin flag;",
1024 me.name, source_p->name);
1025 source_p->umodes &= ~UMODE_NCHANGE; /* only tcm's really need this */
1026 }
1027
1028 if (MyConnect(source_p) && (source_p->umodes & UMODE_ADMIN) &&
1029 !IsOperAdmin(source_p) && !IsOperHiddenAdmin(source_p))
1030 {
1031 sendto_one(source_p, ":%s NOTICE %s :*** You have no admin flag;",
1032 me.name, source_p->name);
1033 source_p->umodes &= ~UMODE_ADMIN;
1034 }
1035
1036 if (!(setflags & UMODE_INVISIBLE) && IsInvisible(source_p))
1037 ++Count.invisi;
1038 if ((setflags & UMODE_INVISIBLE) && !IsInvisible(source_p))
1039 --Count.invisi;
1040
1041 /*
1042 * compare new flags with old flags and send string which
1043 * will cause servers to update correctly.
1044 */
1045 send_umode_out(client_p, source_p, setflags);
1046 }
1047
1048 /* send_umode()
1049 * send the MODE string for user (user) to connection client_p
1050 * -avalon
1051 */
1052 void
1053 send_umode(struct Client *client_p, struct Client *source_p,
1054 unsigned int old, unsigned int sendmask, char *umode_buf)
1055 {
1056 int what = 0;
1057 unsigned int i;
1058 unsigned int flag;
1059 char *m = umode_buf;
1060
1061 /*
1062 * build a string in umode_buf to represent the change in the user's
1063 * mode between the new (source_p->umodes) and 'old'.
1064 */
1065 for (i = 0; i < 128; i++)
1066 {
1067 flag = user_modes[i];
1068 if (!flag)
1069 continue;
1070
1071 if (MyClient(source_p) && !(flag & sendmask))
1072 continue;
1073
1074 if ((flag & old) && !(source_p->umodes & flag))
1075 {
1076 if (what == MODE_DEL)
1077 *m++ = (char)i;
1078 else
1079 {
1080 what = MODE_DEL;
1081 *m++ = '-';
1082 *m++ = (char)i;
1083 }
1084 }
1085 else if (!(flag & old) && (source_p->umodes & flag))
1086 {
1087 if (what == MODE_ADD)
1088 *m++ = (char)i;
1089 else
1090 {
1091 what = MODE_ADD;
1092 *m++ = '+';
1093 *m++ = (char)i;
1094 }
1095 }
1096 }
1097
1098 *m = '\0';
1099
1100 if (*umode_buf && client_p)
1101 sendto_one(client_p, ":%s MODE %s :%s",
1102 source_p->name, source_p->name, umode_buf);
1103 }
1104
1105 /* send_umode_out()
1106 *
1107 * inputs -
1108 * output - NONE
1109 * side effects - Only send ubuf out to servers that know about this client
1110 */
1111 void
1112 send_umode_out(struct Client *client_p, struct Client *source_p,
1113 unsigned int old)
1114 {
1115 char buf[IRCD_BUFSIZE];
1116 dlink_node *ptr = NULL;
1117
1118 send_umode(NULL, source_p, old, IsOperHiddenAdmin(source_p) ?
1119 SEND_UMODES & ~UMODE_ADMIN : SEND_UMODES, buf);
1120
1121 if (*buf)
1122 {
1123 DLINK_FOREACH(ptr, serv_list.head)
1124 {
1125 struct Client *target_p = ptr->data;
1126
1127 if ((target_p != client_p) && (target_p != source_p))
1128 {
1129 if ((!(ServerInfo.hub && IsCapable(target_p, CAP_LL))) ||
1130 (target_p->localClient->serverMask &
1131 source_p->lazyLinkClientExists))
1132 sendto_one(target_p, ":%s MODE %s :%s",
1133 ID_or_name(source_p, target_p),
1134 ID_or_name(source_p, target_p), buf);
1135 }
1136 }
1137 }
1138
1139 if (client_p && MyClient(client_p))
1140 send_umode(client_p, source_p, old, 0xffffffff, buf);
1141 }
1142
1143 /* user_welcome()
1144 *
1145 * inputs - client pointer to client to welcome
1146 * output - NONE
1147 * side effects -
1148 */
1149 static void
1150 user_welcome(struct Client *source_p)
1151 {
1152 #if defined(__TIME__) && defined(__DATE__)
1153 static const char built_date[] = __DATE__ " at " __TIME__;
1154 #else
1155 static const char built_date[] = "unknown";
1156 #endif
1157
1158 #ifdef HAVE_LIBCRYPTO
1159 if (source_p->localClient->fd.ssl != NULL)
1160 sendto_one(source_p, ":%s NOTICE %s :*** Connected securely via %s",
1161 me.name, source_p->name,
1162 ssl_get_cipher(source_p->localClient->fd.ssl));
1163 #endif
1164
1165 sendto_one(source_p, form_str(RPL_WELCOME), me.name, source_p->name,
1166 ServerInfo.network_name, source_p->name);
1167 sendto_one(source_p, form_str(RPL_YOURHOST), me.name, source_p->name,
1168 get_listener_name(source_p->localClient->listener), ircd_version);
1169 sendto_one(source_p, form_str(RPL_CREATED),
1170 me.name, source_p->name, built_date);
1171 sendto_one(source_p, form_str(RPL_MYINFO),
1172 me.name, source_p->name, me.name, ircd_version, umode_buffer);
1173 show_isupport(source_p);
1174
1175 if (source_p->id[0] != '\0')
1176 sendto_one(source_p, form_str(RPL_YOURID), me.name,
1177 source_p->name, source_p->id);
1178
1179 show_lusers(source_p);
1180
1181 if (ConfigFileEntry.short_motd)
1182 {
1183 sendto_one(source_p, "NOTICE %s :*** Notice -- motd was last changed at %s",
1184 source_p->name, ConfigFileEntry.motd.lastChangedDate);
1185 sendto_one(source_p,
1186 "NOTICE %s :*** Notice -- Please read the motd if you haven't "
1187 "read it", source_p->name);
1188 sendto_one(source_p, form_str(RPL_MOTDSTART),
1189 me.name, source_p->name, me.name);
1190 sendto_one(source_p, form_str(RPL_MOTD),
1191 me.name, source_p->name,
1192 "*** This is the short motd ***");
1193 sendto_one(source_p, form_str(RPL_ENDOFMOTD),
1194 me.name, source_p->name);
1195 }
1196 else
1197 send_message_file(source_p, &ConfigFileEntry.motd);
1198 }
1199
1200 /* check_xline()
1201 *
1202 * inputs - pointer to client to test
1203 * outupt - 1 if exiting 0 if ok
1204 * side effects -
1205 */
1206 static int
1207 check_xline(struct Client *source_p)
1208 {
1209 struct ConfItem *conf;
1210 struct MatchItem *xconf;
1211 const char *reason;
1212
1213 if ((conf = find_matching_name_conf(XLINE_TYPE, source_p->info,
1214 NULL, NULL, 0)) != NULL)
1215 {
1216 xconf = map_to_conf(conf);
1217 xconf->count++;
1218
1219 if (xconf->reason != NULL)
1220 reason = xconf->reason;
1221 else
1222 reason = "No Reason";
1223
1224 sendto_realops_flags(UMODE_REJ, L_ALL,
1225 "X-line Rejecting [%s] [%s], user %s [%s]",
1226 source_p->info, reason,
1227 get_client_name(source_p, HIDE_IP),
1228 source_p->sockhost);
1229
1230 ServerStats->is_ref++;
1231 if (REJECT_HOLD_TIME > 0)
1232 {
1233 sendto_one(source_p, ":%s NOTICE %s :Bad user info",
1234 me.name, source_p->name);
1235 source_p->localClient->reject_delay = CurrentTime + REJECT_HOLD_TIME;
1236 SetCaptured(source_p);
1237 }
1238 else
1239 exit_client(source_p, &me, "Bad user info");
1240 return 1;
1241 }
1242
1243 return 0;
1244 }
1245
1246 static int
1247 check_regexp_xline(struct Client *source_p)
1248 {
1249 struct ConfItem *conf = NULL;
1250 const char *reason = NULL;
1251
1252 if ((conf = find_matching_name_conf(RXLINE_TYPE, source_p->info, NULL, NULL, 0)))
1253 {
1254 struct MatchItem *reg = map_to_conf(conf);
1255
1256 ++reg->count;
1257
1258 if (reg->reason != NULL)
1259 reason = reg->reason;
1260 else
1261 reason = "No Reason";
1262
1263 sendto_realops_flags(UMODE_REJ, L_ALL,
1264 "X-line (REGEX) Rejecting [%s] [%s], user %s [%s]",
1265 source_p->info, reason,
1266 get_client_name(source_p, HIDE_IP),
1267 source_p->sockhost);
1268
1269 ServerStats->is_ref++;
1270 exit_client(source_p, &me, "Bad user info");
1271 return 1;
1272 }
1273
1274 return 0;
1275 }
1276
1277 /* oper_up()
1278 *
1279 * inputs - pointer to given client to oper
1280 * output - NONE
1281 * side effects - Blindly opers up given source_p, using aconf info
1282 * all checks on passwords have already been done.
1283 * This could also be used by rsa oper routines.
1284 */
1285 void
1286 oper_up(struct Client *source_p)
1287 {
1288 unsigned int old = source_p->umodes;
1289 const char *operprivs = "";
1290 const struct AccessItem *oconf = NULL;
1291
1292 assert(source_p->localClient->confs.head);
1293 oconf = map_to_conf((source_p->localClient->confs.head)->data);
1294
1295 ++Count.oper;
1296 SetOper(source_p);
1297
1298 if (oconf->modes)
1299 source_p->umodes |= oconf->modes;
1300 else if (ConfigFileEntry.oper_umodes)
1301 source_p->umodes |= ConfigFileEntry.oper_umodes;
1302 else
1303 source_p->umodes |= (UMODE_SERVNOTICE|UMODE_OPERWALL|
1304 UMODE_WALLOP|UMODE_LOCOPS);
1305
1306 assert(dlinkFind(&oper_list, source_p) == NULL);
1307 dlinkAdd(source_p, make_dlink_node(), &oper_list);
1308
1309 operprivs = oper_privs_as_string(oconf->port);
1310
1311 SetOFlag(source_p, oconf->port);
1312
1313 if (IsOperAdmin(source_p) || IsOperHiddenAdmin(source_p))
1314 source_p->umodes |= UMODE_ADMIN;
1315 if (!IsOperN(source_p))
1316 source_p->umodes &= ~UMODE_NCHANGE;
1317
1318 sendto_realops_flags(UMODE_ALL, L_ALL, "%s (%s@%s) is now an operator",
1319 source_p->name, source_p->username, source_p->host);
1320 send_umode_out(source_p, source_p, old);
1321 sendto_one(source_p, form_str(RPL_YOUREOPER), me.name, source_p->name);
1322 sendto_one(source_p, ":%s NOTICE %s :*** Oper privs are %s",
1323 me.name, source_p->name, operprivs);
1324 send_message_file(source_p, &ConfigFileEntry.opermotd);
1325 }
1326
1327 /*
1328 * Quick and dirty UID code for new proposed SID on EFnet
1329 *
1330 */
1331
1332 static char new_uid[TOTALSIDUID+1]; /* allow for \0 */
1333 static void add_one_to_uid(int i);
1334
1335 /*
1336 * init_uid()
1337 *
1338 * inputs - NONE
1339 * output - NONE
1340 * side effects - new_uid is filled in with server id portion (sid)
1341 * (first 3 bytes) or defaulted to 'A'.
1342 * Rest is filled in with 'A'
1343 */
1344 void
1345 init_uid(void)
1346 {
1347 int i;
1348
1349 memset(new_uid, 0, sizeof(new_uid));
1350
1351 if (ServerInfo.sid != NULL)
1352 {
1353 memcpy(new_uid, ServerInfo.sid, IRCD_MIN(strlen(ServerInfo.sid),
1354 IRC_MAXSID));
1355 memcpy(&me.id, ServerInfo.sid, IRCD_MIN(strlen(ServerInfo.sid),
1356 IRC_MAXSID));
1357 hash_add_id(&me);
1358 }
1359
1360 for (i = 0; i < IRC_MAXSID; i++)
1361 if (new_uid[i] == '\0')
1362 new_uid[i] = 'A';
1363
1364 /* XXX if IRC_MAXUID != 6, this will have to be rewritten */
1365 /* Yes nenolod, I have known it was off by one ever since I wrote it
1366 * But *JUST* for you, though, it really doesn't look as *pretty*
1367 * -Dianora
1368 */
1369 memcpy(new_uid+IRC_MAXSID, "AAAAA@", IRC_MAXUID);
1370
1371 entering_umode_cb = register_callback("entering_umode", NULL);
1372 umode_cb = register_callback("changing_umode", change_simple_umode);
1373 uid_get_cb = register_callback("uid_get", uid_get);
1374 }
1375
1376 /*
1377 * uid_get
1378 *
1379 * inputs - struct Client *
1380 * output - new UID is returned to caller
1381 * side effects - new_uid is incremented by one.
1382 */
1383 static void *
1384 uid_get(va_list args)
1385 {
1386 add_one_to_uid(TOTALSIDUID-1); /* index from 0 */
1387 return ((void *) new_uid);
1388 }
1389
1390 /*
1391 * add_one_to_uid
1392 *
1393 * inputs - index number into new_uid
1394 * output - NONE
1395 * side effects - new_uid is incremented by one
1396 * note this is a recursive function
1397 */
1398 static void
1399 add_one_to_uid(int i)
1400 {
1401 if (i != IRC_MAXSID) /* Not reached server SID portion yet? */
1402 {
1403 if (new_uid[i] == 'Z')
1404 new_uid[i] = '0';
1405 else if (new_uid[i] == '9')
1406 {
1407 new_uid[i] = 'A';
1408 add_one_to_uid(i-1);
1409 }
1410 else new_uid[i] = new_uid[i] + 1;
1411 }
1412 else
1413 {
1414 /* XXX if IRC_MAXUID != 6, this will have to be rewritten */
1415 if (new_uid[i] == 'Z')
1416 memcpy(new_uid+IRC_MAXSID, "AAAAAA", IRC_MAXUID);
1417 else
1418 new_uid[i] = new_uid[i] + 1;
1419 }
1420 }
1421
1422 /*
1423 * init_isupport()
1424 *
1425 * input - NONE
1426 * output - NONE
1427 * side effects - Must be called before isupport is enabled
1428 */
1429 void
1430 init_isupport(void)
1431 {
1432 isupportFile = init_MessageLine();
1433
1434 add_isupport("CALLERID", NULL, -1);
1435 add_isupport("CASEMAPPING", CASEMAP, -1);
1436 add_isupport("KICKLEN", NULL, KICKLEN);
1437 add_isupport("MODES", NULL, MAXMODEPARAMS);
1438 add_isupport("NICKLEN", NULL, NICKLEN-1);
1439 #ifdef HALFOPS
1440 add_isupport("PREFIX", "(ohv)@%+", -1);
1441 add_isupport("STATUSMSG", "@%+", -1);
1442 #else
1443 add_isupport("PREFIX", "(ov)@+", -1);
1444 add_isupport("STATUSMSG", "@+", -1);
1445 #endif
1446 add_isupport("TOPICLEN", NULL, TOPICLEN);
1447 }
1448
1449 /*
1450 * add_isupport()
1451 *
1452 * input - name of supported function
1453 * - options if any
1454 * - number if any
1455 * output - NONE
1456 * side effects - Each supported item must call this when activated
1457 */
1458 void
1459 add_isupport(const char *name, const char *options, int n)
1460 {
1461 dlink_node *ptr;
1462 struct Isupport *support;
1463
1464 DLINK_FOREACH(ptr, support_list.head)
1465 {
1466 support = ptr->data;
1467 if (irccmp(support->name, name) == 0)
1468 {
1469 MyFree(support->name);
1470 MyFree(support->options);
1471 break;
1472 }
1473 }
1474
1475 if (ptr == NULL)
1476 {
1477 support = MyMalloc(sizeof(*support));
1478 dlinkAddTail(support, &support->node, &support_list);
1479 }
1480
1481 DupString(support->name, name);
1482 if (options != NULL)
1483 DupString(support->options, options);
1484 support->number = n;
1485
1486 rebuild_isupport_message_line();
1487 }
1488
1489 /*
1490 * delete_isupport()
1491 *
1492 * input - name of supported function
1493 * output - NONE
1494 * side effects - Each supported item must call this when deactivated
1495 */
1496 void
1497 delete_isupport(const char *name)
1498 {
1499 dlink_node *ptr;
1500 struct Isupport *support;
1501
1502 DLINK_FOREACH(ptr, support_list.head)
1503 {
1504 support = ptr->data;
1505 if (irccmp(support->name, name) == 0)
1506 {
1507 dlinkDelete(ptr, &support_list);
1508 MyFree(support->name);
1509 MyFree(support->options);
1510 MyFree(support);
1511 break;
1512 }
1513 }
1514
1515 rebuild_isupport_message_line();
1516 }
1517
1518 /*
1519 * rebuild_isupport_message_line
1520 *
1521 * input - NONE
1522 * output - NONE
1523 * side effects - Destroy the isupport MessageFile lines, and rebuild.
1524 */
1525 void
1526 rebuild_isupport_message_line(void)
1527 {
1528 char isupportbuffer[IRCD_BUFSIZE];
1529 char *p = isupportbuffer;
1530 dlink_node *ptr = NULL;
1531 int n = 0;
1532 int tokens = 0;
1533 size_t len = 0;
1534 size_t reserve = strlen(me.name) + HOSTLEN + strlen(form_str(RPL_ISUPPORT));
1535
1536 destroy_MessageLine(isupportFile);
1537
1538 DLINK_FOREACH(ptr, support_list.head)
1539 {
1540 struct Isupport *support = ptr->data;
1541
1542 p += (n = ircsprintf(p, "%s", support->name));
1543 len += n;
1544
1545 if (support->options != NULL)
1546 {
1547 p += (n = ircsprintf(p, "=%s", support->options));
1548 len += n;
1549 }
1550
1551 if (support->number > 0)
1552 {
1553 p += (n = ircsprintf(p, "=%d", support->number));
1554 len += n;
1555 }
1556
1557 *p++ = ' ';
1558 len++;
1559 *p = '\0';
1560
1561 if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
1562 { /* arbritrary for now */
1563 if (*--p == ' ')
1564 *p = '\0';
1565
1566 addto_MessageLine(isupportFile, isupportbuffer);
1567 p = isupportbuffer;
1568 len = 0;
1569 n = tokens = 0;
1570 }
1571 }
1572
1573 if (len != 0)
1574 {
1575 if (*--p == ' ')
1576 *p = '\0';
1577 addto_MessageLine(isupportFile, isupportbuffer);
1578 }
1579 }

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