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root/svn/ircd-hybrid/trunk/src/user.c
Revision: 4108
Committed: Mon Jun 30 21:02:06 2014 UTC (9 years, 8 months ago) by michael
Content type: text/x-csrc
File size: 32253 byte(s)
Log Message:
- Allow [ in usernames

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1997-2014 ircd-hybrid development team
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 s_user.c
23 * \brief User related functions.
24 * \version $Id$
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "user.h"
30 #include "channel.h"
31 #include "channel_mode.h"
32 #include "client.h"
33 #include "hash.h"
34 #include "irc_string.h"
35 #include "ircd.h"
36 #include "listener.h"
37 #include "motd.h"
38 #include "numeric.h"
39 #include "conf.h"
40 #include "log.h"
41 #include "server.h"
42 #include "send.h"
43 #include "memory.h"
44 #include "packet.h"
45 #include "rng_mt.h"
46 #include "userhost.h"
47 #include "misc.h"
48 #include "parse.h"
49 #include "watch.h"
50
51 static char umode_buffer[IRCD_BUFSIZE];
52 static const char *uid_get(void);
53
54 /* Used for building up the isupport string,
55 * used with init_isupport, add_isupport, delete_isupport
56 */
57 struct Isupport
58 {
59 dlink_node node;
60 char *name;
61 char *options;
62 int number;
63 };
64
65 static dlink_list support_list;
66 static dlink_list support_list_lines;
67
68 /* memory is cheap. map 0-255 to equivalent mode */
69 const unsigned int user_modes[256] =
70 {
71 /* 0x00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x0F */
72 /* 0x10 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1F */
73 /* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2F */
74 /* 0x30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x3F */
75 0, /* @ */
76 0, /* A */
77 0, /* B */
78 0, /* C */
79 UMODE_DEAF, /* D */
80 0, /* E */
81 UMODE_FARCONNECT, /* F */
82 UMODE_SOFTCALLERID, /* G */
83 UMODE_HIDDEN, /* H */
84 0, /* I */
85 0, /* J */
86 0, /* K */
87 0, /* L */
88 0, /* M */
89 0, /* N */
90 0, /* O */
91 0, /* P */
92 0, /* Q */
93 UMODE_REGONLY, /* R */
94 UMODE_SSL, /* S */
95 0, /* T */
96 0, /* U */
97 0, /* V */
98 UMODE_WEBIRC, /* W */
99 0, /* X */
100 0, /* Y */
101 0, /* Z 0x5A */
102 0, 0, 0, 0, 0, /* 0x5F */
103 0, /* 0x60 */
104 UMODE_ADMIN, /* a */
105 UMODE_BOTS, /* b */
106 UMODE_CCONN, /* c */
107 UMODE_DEBUG, /* d */
108 UMODE_EXTERNAL, /* e */
109 UMODE_FULL, /* f */
110 UMODE_CALLERID, /* g */
111 0, /* h */
112 UMODE_INVISIBLE, /* i */
113 UMODE_REJ, /* j */
114 UMODE_SKILL, /* k */
115 UMODE_LOCOPS, /* l */
116 0, /* m */
117 UMODE_NCHANGE, /* n */
118 UMODE_OPER, /* o */
119 UMODE_HIDECHANS, /* p */
120 UMODE_HIDEIDLE, /* q */
121 UMODE_REGISTERED, /* r */
122 UMODE_SERVNOTICE, /* s */
123 0, /* t */
124 UMODE_UNAUTH, /* u */
125 0, /* v */
126 UMODE_WALLOP, /* w */
127 UMODE_HIDDENHOST, /* x */
128 UMODE_SPY, /* y */
129 0, /* z 0x7A */
130 0,0,0,0,0, /* 0x7B - 0x7F */
131
132 /* 0x80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x8F */
133 /* 0x90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x9F */
134 /* 0xA0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xAF */
135 /* 0xB0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xBF */
136 /* 0xC0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xCF */
137 /* 0xD0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xDF */
138 /* 0xE0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xEF */
139 /* 0xF0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* 0xFF */
140 };
141
142 void
143 assemble_umode_buffer(void)
144 {
145 unsigned int idx = 0;
146 char *umode_buffer_ptr = umode_buffer;
147
148 for (; idx < (sizeof(user_modes) / sizeof(user_modes[0])); ++idx)
149 if (user_modes[idx])
150 *umode_buffer_ptr++ = idx;
151
152 *umode_buffer_ptr = '\0';
153 }
154
155 /* show_lusers()
156 *
157 * inputs - pointer to client
158 * output - NONE
159 * side effects - display to client user counts etc.
160 */
161 void
162 show_lusers(struct Client *source_p)
163 {
164 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
165 sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total-Count.invisi),
166 Count.invisi, dlink_list_length(&global_serv_list));
167 else
168 sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT,
169 (Count.total - Count.invisi), Count.invisi, 1);
170
171 if (Count.oper)
172 sendto_one_numeric(source_p, &me, RPL_LUSEROP, Count.oper);
173
174 if (dlink_list_length(&unknown_list))
175 sendto_one_numeric(source_p, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list));
176
177 if (dlink_list_length(&channel_list))
178 sendto_one_numeric(source_p, &me, RPL_LUSERCHANNELS, dlink_list_length(&channel_list));
179
180 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
181 {
182 sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.local, Count.myserver);
183 sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.local, Count.max_loc);
184 }
185 else
186 {
187 sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.total, 0);
188 sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.total, Count.max_tot);
189 }
190
191 sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot);
192
193 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
194 sendto_one_numeric(source_p, &me, RPL_STATSCONN, Count.max_loc_con,
195 Count.max_loc_cli, Count.totalrestartcount);
196
197 if (Count.local > Count.max_loc_cli)
198 Count.max_loc_cli = Count.local;
199
200 if ((Count.local + Count.myserver) > Count.max_loc_con)
201 Count.max_loc_con = Count.local + Count.myserver;
202 }
203
204 /* show_isupport()
205 *
206 * inputs - pointer to client
207 * output - NONE
208 * side effects - display to client what we support (for them)
209 */
210 void
211 show_isupport(struct Client *source_p)
212 {
213 const dlink_node *ptr = NULL;
214
215 DLINK_FOREACH(ptr, support_list_lines.head)
216 sendto_one_numeric(source_p, &me, RPL_ISUPPORT, ptr->data);
217 }
218
219
220 /* report_and_set_user_flags()
221 *
222 * inputs - pointer to source_p
223 * - pointer to conf for this user
224 * output - NONE
225 * side effects - Report to user any special flags
226 * they are getting, and set them.
227 */
228 static void
229 report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf)
230 {
231 /* If this user is being spoofed, tell them so */
232 if (IsConfDoSpoofIp(conf))
233 sendto_one_notice(source_p, &me, ":*** Spoofing your IP. Congrats.");
234
235 /* If this user is in the exception class, Set it "E lined" */
236 if (IsConfExemptKline(conf))
237 {
238 SetExemptKline(source_p);
239 sendto_one_notice(source_p, &me, ":*** You are exempt from K/D/G lines. Congrats.");
240 }
241
242 /*
243 * The else here is to make sure that G line exempt users
244 * do not get noticed twice.
245 */
246 else if (IsConfExemptGline(conf))
247 {
248 SetExemptGline(source_p);
249 sendto_one_notice(source_p, &me, ":*** You are exempt from G lines. Congrats.");
250 }
251
252 if (IsConfExemptResv(conf))
253 {
254 SetExemptResv(source_p);
255 sendto_one_notice(source_p, &me, ":*** You are exempt from resvs. Congrats.");
256 }
257
258 /* If this user is exempt from user limits set it "F lined" */
259 if (IsConfExemptLimits(conf))
260 {
261 SetExemptLimits(source_p);
262 sendto_one_notice(source_p, &me, ":*** You are exempt from user limits. Congrats.");
263 }
264
265 if (IsConfCanFlood(conf))
266 {
267 SetCanFlood(source_p);
268 sendto_one_notice(source_p, &me, ":*** You are exempt from flood "
269 "protection, aren't you fearsome.");
270 }
271 }
272
273 /* introduce_client()
274 *
275 * inputs - source_p
276 * output - NONE
277 * side effects - This common function introduces a client to the rest
278 * of the net, either from a local client connect or
279 * from a remote connect.
280 */
281 static void
282 introduce_client(struct Client *source_p)
283 {
284 dlink_node *ptr = NULL;
285 char ubuf[IRCD_BUFSIZE] = "";
286
287 if (MyClient(source_p))
288 send_umode(source_p, source_p, 0, ubuf);
289 else
290 send_umode(NULL, source_p, 0, ubuf);
291
292 watch_check_hash(source_p, RPL_LOGON);
293
294 if (ubuf[0] == '\0')
295 {
296 ubuf[0] = '+';
297 ubuf[1] = '\0';
298 }
299
300 DLINK_FOREACH(ptr, serv_list.head)
301 {
302 struct Client *server = ptr->data;
303
304 if (server == source_p->from)
305 continue;
306
307 if (IsCapable(server, CAP_SVS))
308 sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s %s :%s",
309 source_p->servptr->id,
310 source_p->name, source_p->hopcount+1,
311 (unsigned long)source_p->tsinfo,
312 ubuf, source_p->username, source_p->host,
313 (MyClient(source_p) && IsIPSpoof(source_p)) ?
314 "0" : source_p->sockhost, source_p->id,
315 source_p->svid,
316 source_p->info);
317 else
318 sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s",
319 source_p->servptr->id,
320 source_p->name, source_p->hopcount+1,
321 (unsigned long)source_p->tsinfo,
322 ubuf, source_p->username, source_p->host,
323 (MyClient(source_p) && IsIPSpoof(source_p)) ?
324 "0" : source_p->sockhost, source_p->id, source_p->info);
325
326 if (!EmptyString(source_p->certfp))
327 sendto_one(server, ":%s CERTFP %s", source_p->id, source_p->certfp);
328 }
329 }
330
331 /* user_welcome()
332 *
333 * inputs - client pointer to client to welcome
334 * output - NONE
335 * side effects -
336 */
337 static void
338 user_welcome(struct Client *source_p)
339 {
340 #if defined(__TIME__) && defined(__DATE__)
341 static const char built_date[] = __DATE__ " at " __TIME__;
342 #else
343 static const char built_date[] = "unknown";
344 #endif
345
346 #ifdef HAVE_LIBCRYPTO
347 if (HasFlag(source_p, FLAGS_SSL))
348 {
349 AddUMode(source_p, UMODE_SSL);
350 sendto_one_notice(source_p, &me, ":*** Connected securely via %s",
351 ssl_get_cipher(source_p->localClient->fd.ssl));
352 }
353 #endif
354
355 sendto_one_numeric(source_p, &me, RPL_WELCOME, ServerInfo.network_name,
356 source_p->name);
357 sendto_one_numeric(source_p, &me, RPL_YOURHOST,
358 get_listener_name(source_p->localClient->listener), ircd_version);
359 sendto_one_numeric(source_p, &me, RPL_CREATED, built_date);
360 sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer);
361 show_isupport(source_p);
362
363 if (source_p->id[0])
364 sendto_one_numeric(source_p, &me, RPL_YOURID, source_p->id);
365
366 show_lusers(source_p);
367 motd_signon(source_p);
368 }
369
370 /* check_xline()
371 *
372 * inputs - pointer to client to test
373 * outupt - 1 if exiting 0 if ok
374 * side effects -
375 */
376 static int
377 check_xline(struct Client *source_p)
378 {
379 struct MaskItem *conf = NULL;
380 const char *reason = NULL;
381
382 if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0)))
383 {
384 ++conf->count;
385
386 if (conf->reason)
387 reason = conf->reason;
388 else
389 reason = CONF_NOREASON;
390
391 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
392 "X-line Rejecting [%s] [%s], user %s [%s]",
393 source_p->info, reason,
394 get_client_name(source_p, HIDE_IP),
395 source_p->sockhost);
396
397 ++ServerStats.is_ref;
398 exit_client(source_p, "Bad user info");
399 return 1;
400 }
401
402 return 0;
403 }
404
405 /*! \brief This function is called when both NICK and USER messages
406 * have been accepted for the client, in whatever order. Only
407 * after this, is the UID message propagated.
408 * \param source_p Pointer to given client to introduce
409 */
410 void
411 register_local_user(struct Client *source_p)
412 {
413 const char *id = NULL;
414 const struct MaskItem *conf = NULL;
415
416 assert(source_p == source_p->from);
417 assert(MyConnect(source_p));
418 assert(!source_p->localClient->registration);
419
420 ClearCap(source_p, CAP_TS6);
421
422 if (ConfigFileEntry.ping_cookie)
423 {
424 if (!IsPingSent(source_p) && !source_p->localClient->random_ping)
425 {
426 do
427 source_p->localClient->random_ping = genrand_int32();
428 while (!source_p->localClient->random_ping);
429
430 sendto_one(source_p, "PING :%u",
431 source_p->localClient->random_ping);
432 SetPingSent(source_p);
433 return;
434 }
435
436 if (!HasPingCookie(source_p))
437 return;
438 }
439
440 source_p->localClient->last_privmsg = CurrentTime;
441 /* Straight up the maximum rate of flooding... */
442 source_p->localClient->allow_read = MAX_FLOOD_BURST;
443
444 if (!check_client(source_p))
445 return;
446
447 if (!valid_hostname(source_p->host))
448 {
449 sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal "
450 "character in your hostname");
451 strlcpy(source_p->host, source_p->sockhost,
452 sizeof(source_p->host));
453 }
454
455 conf = source_p->localClient->confs.head->data;
456
457 if (!IsGotId(source_p))
458 {
459 char username[USERLEN + 1] = "";
460 const char *p = username;
461 unsigned int i = 0;
462
463 if (IsNeedIdentd(conf))
464 {
465 ++ServerStats.is_ref;
466 sendto_one_notice(source_p, &me, ":*** Notice -- You need to install "
467 "identd to use this server");
468 exit_client(source_p, "Install identd");
469 return;
470 }
471
472 strlcpy(username, source_p->username, sizeof(username));
473
474 if (!IsNoTilde(conf))
475 source_p->username[i++] = '~';
476
477 for (; *p && i < USERLEN; ++p)
478 source_p->username[i++] = *p;
479
480 source_p->username[i] = '\0';
481 }
482
483 /* Password check */
484 if (!EmptyString(conf->passwd))
485 {
486 if (!match_conf_password(source_p->localClient->passwd, conf))
487 {
488 ++ServerStats.is_ref;
489
490 sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH);
491 exit_client(source_p, "Bad Password");
492 return;
493 }
494 }
495
496 /*
497 * Don't free source_p->localClient->passwd here - it can be required
498 * by masked /stats I if there are auth{} blocks with need_password = no;
499 * --adx
500 */
501
502 /*
503 * Report if user has &^>= etc. and set flags as needed in source_p
504 */
505 report_and_set_user_flags(source_p, conf);
506
507 if (IsDead(source_p))
508 return;
509
510 /*
511 * Limit clients -
512 * We want to be able to have servers and F-line clients
513 * connect, so save room for "buffer" connections.
514 * Smaller servers may want to decrease this, and it should
515 * probably be just a percentage of the MAXCLIENTS...
516 * -Taner
517 */
518 if ((Count.local >= ServerInfo.max_clients + MAX_BUFFER) ||
519 (Count.local >= ServerInfo.max_clients && !IsExemptLimits(source_p)))
520 {
521 sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE,
522 "Too many clients, rejecting %s[%s].",
523 source_p->name, source_p->host);
524 ++ServerStats.is_ref;
525 exit_client(source_p, "Sorry, server is full - try later");
526 return;
527 }
528
529 if (!valid_username(source_p->username, 1))
530 {
531 char buf[IRCD_BUFSIZE] = "";
532
533 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
534 "Invalid username: %s (%s@%s)",
535 source_p->name, source_p->username, source_p->host);
536 ++ServerStats.is_ref;
537 snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username);
538 exit_client(source_p, buf);
539 return;
540 }
541
542 if (check_xline(source_p))
543 return;
544
545 while (hash_find_id((id = uid_get())))
546 ;
547
548 strlcpy(source_p->id, id, sizeof(source_p->id));
549 hash_add_id(source_p);
550
551 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
552 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>",
553 source_p->name, source_p->username, source_p->host,
554 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
555 "255.255.255.255" : source_p->sockhost,
556 get_client_class(&source_p->localClient->confs),
557 source_p->info, source_p->id);
558
559 if (ConfigFileEntry.invisible_on_connect)
560 {
561 AddUMode(source_p, UMODE_INVISIBLE);
562 ++Count.invisi;
563 }
564
565 if (++Count.local > Count.max_loc)
566 {
567 Count.max_loc = Count.local;
568
569 if (!(Count.max_loc % 10))
570 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
571 "New Max Local Clients: %d",
572 Count.max_loc);
573 }
574
575 if (++Count.total > Count.max_tot)
576 Count.max_tot = Count.total;
577 ++Count.totalrestartcount;
578
579 assert(source_p->servptr == &me);
580 SetClient(source_p);
581 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
582
583 assert(dlinkFind(&unknown_list, source_p));
584
585 dlink_move_node(&source_p->localClient->lclient_node,
586 &unknown_list, &local_client_list);
587
588 user_welcome(source_p);
589 add_user_host(source_p->username, source_p->host, 0);
590 SetUserHost(source_p);
591
592 introduce_client(source_p);
593 }
594
595 /* register_remote_user()
596 *
597 * inputs - source_p remote or directly connected client
598 * - username to register as
599 * - host name to register as
600 * - server name
601 * output - NONE
602 * side effects - This function is called when a remote client
603 * is introduced by a server.
604 */
605 void
606 register_remote_user(struct Client *source_p)
607 {
608 struct Client *target_p = NULL;
609
610 if ((target_p = source_p->servptr) && target_p->from != source_p->from)
611 {
612 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
613 "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
614 source_p->from->name, source_p->name, source_p->username,
615 source_p->host, source_p->servptr->name,
616 target_p->name, target_p->from->name);
617 sendto_one(source_p->from,
618 ":%s KILL %s :%s (NICK from wrong direction (%s != %s))",
619 me.id, source_p->id, me.name, source_p->servptr->name,
620 target_p->from->name);
621
622 AddFlag(source_p, FLAGS_KILLED);
623 exit_client(source_p, "USER server wrong direction");
624 return;
625 }
626
627 /*
628 * If the nick has been introduced by a services server,
629 * make it a service as well.
630 */
631 if (HasFlag(source_p->servptr, FLAGS_SERVICE))
632 AddFlag(source_p, FLAGS_SERVICE);
633
634 if (++Count.total > Count.max_tot)
635 Count.max_tot = Count.total;
636
637 SetClient(source_p);
638 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
639 add_user_host(source_p->username, source_p->host, 1);
640 SetUserHost(source_p);
641
642 if (HasFlag(source_p->servptr, FLAGS_EOB))
643 sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE,
644 "Client connecting at %s: %s (%s@%s) [%s] <%s>",
645 source_p->servptr->name,
646 source_p->name, source_p->username, source_p->host,
647 source_p->info, source_p->id);
648
649 introduce_client(source_p);
650 }
651
652 /* valid_hostname()
653 *
654 * Inputs - pointer to hostname
655 * Output - 1 if valid, 0 if not
656 * Side effects - check hostname for validity
657 *
658 * NOTE: this doesn't allow a hostname to begin with a dot and
659 * will not allow more dots than chars.
660 */
661 int
662 valid_hostname(const char *hostname)
663 {
664 const char *p = hostname;
665
666 assert(p);
667
668 if (EmptyString(p) || *p == '.' || *p == ':')
669 return 0;
670
671 for (; *p; ++p)
672 if (!IsHostChar(*p))
673 return 0;
674
675 return p - hostname <= HOSTLEN;
676 }
677
678 /* valid_username()
679 *
680 * Inputs - pointer to user
681 * Output - 1 if valid, 0 if not
682 * Side effects - check username for validity
683 *
684 * Absolutely always reject any '*' '!' '?' '@' in an user name
685 * reject any odd control characters names.
686 * Allow '.' in username to allow for "first.last"
687 * style of username
688 */
689 int
690 valid_username(const char *username, const int local)
691 {
692 unsigned int dots = 0;
693 const char *p = username;
694
695 assert(p);
696
697 if (*p == '~')
698 ++p;
699
700 /*
701 * Reject usernames that don't start with an alphanum
702 * i.e. reject jokers who have '-@somehost' or '.@somehost'
703 * or "-hi-@somehost", "h-----@somehost" would still be accepted.
704 */
705 if (!IsAlNum(*p))
706 return 0;
707
708 if (local)
709 {
710 while (*++p)
711 {
712 if (*p == '.' && ConfigFileEntry.dots_in_ident)
713 {
714 if (++dots > ConfigFileEntry.dots_in_ident)
715 return 0;
716 if (!IsUserChar(*(p + 1)))
717 return 0;
718 }
719 else if (!IsUserChar(*p))
720 return 0;
721 }
722 }
723 else
724 {
725 while (*++p)
726 if (!IsUserChar(*p))
727 return 0;
728 }
729
730 return p - username <= USERLEN;
731 }
732
733 /* clean_nick_name()
734 *
735 * input - nickname
736 * - whether it's a local nick (1) or remote (0)
737 * output - none
738 * side effects - walks through the nickname, returning 0 if erroneous
739 */
740 int
741 valid_nickname(const char *nickname, const int local)
742 {
743 const char *p = nickname;
744
745 assert(nickname && *nickname);
746
747 /*
748 * Nicks can't start with a digit or - or be 0 length.
749 */
750 if (*p == '-' || (IsDigit(*p) && local) || *p == '\0')
751 return 0;
752
753 for (; *p; ++p)
754 if (!IsNickChar(*p))
755 return 0;
756
757 return p - nickname <= NICKLEN;
758 }
759
760 /* send_umode()
761 * send the MODE string for user (user) to connection client_p
762 * -avalon
763 *
764 * inputs - client_p
765 * - source_p
766 * - int old
767 * - sendmask mask of modes to send
768 * - suplied umode_buf
769 * output - NONE
770 */
771 void
772 send_umode(struct Client *client_p, struct Client *source_p,
773 unsigned int old, char *umode_buf)
774 {
775 char *m = umode_buf;
776 int what = 0;
777
778 /*
779 * Build a string in umode_buf to represent the change in the user's
780 * mode between the new (source_p->umodes) and 'old'.
781 */
782 for (unsigned int i = 0; i < 128; ++i)
783 {
784 unsigned int flag = user_modes[i];
785
786 if (!flag)
787 continue;
788
789 if ((flag & old) && !HasUMode(source_p, flag))
790 {
791 if (what == MODE_DEL)
792 *m++ = (char)i;
793 else
794 {
795 what = MODE_DEL;
796 *m++ = '-';
797 *m++ = (char)i;
798 }
799 }
800 else if (!(flag & old) && HasUMode(source_p, flag))
801 {
802 if (what == MODE_ADD)
803 *m++ = (char)i;
804 else
805 {
806 what = MODE_ADD;
807 *m++ = '+';
808 *m++ = (char)i;
809 }
810 }
811 }
812
813 *m = '\0';
814
815 if (*umode_buf && client_p)
816 sendto_one(client_p, ":%s!%s@%s MODE %s :%s",
817 source_p->name, source_p->username,
818 source_p->host, source_p->name, umode_buf);
819 }
820
821 /* send_umode_out()
822 *
823 * inputs -
824 * output - NONE
825 * side effects - Only send ubuf out to servers that know about this client
826 */
827 void
828 send_umode_out(struct Client *client_p, struct Client *source_p,
829 unsigned int old)
830 {
831 char buf[IRCD_BUFSIZE] = "";
832
833 send_umode(NULL, source_p, old, buf);
834
835 if (buf[0])
836 sendto_server(source_p, NOCAPS, NOCAPS, ":%s MODE %s :%s",
837 source_p->id, source_p->id, buf);
838
839 if (client_p && MyClient(client_p))
840 send_umode(client_p, source_p, old, buf);
841 }
842
843 void
844 user_set_hostmask(struct Client *target_p, const char *hostname, const int what)
845 {
846 dlink_node *ptr = NULL;
847
848 if (!strcmp(target_p->host, hostname))
849 return;
850
851 switch (what)
852 {
853 case MODE_ADD:
854 AddUMode(target_p, UMODE_HIDDENHOST);
855 AddFlag(target_p, FLAGS_IP_SPOOFING);
856 break;
857 case MODE_DEL:
858 DelUMode(target_p, UMODE_HIDDENHOST);
859
860 if (!HasFlag(target_p, FLAGS_AUTH_SPOOF))
861 DelFlag(target_p, FLAGS_IP_SPOOFING);
862 break;
863 default: return;
864 }
865
866 if (ConfigFileEntry.cycle_on_host_change)
867 sendto_common_channels_local(target_p, 0, 0, ":%s!%s@%s QUIT :Changing hostname",
868 target_p->name, target_p->username, target_p->host);
869
870 if (IsUserHostIp(target_p))
871 delete_user_host(target_p->username, target_p->host, !MyConnect(target_p));
872
873 strlcpy(target_p->host, hostname, sizeof(target_p->host));
874
875 add_user_host(target_p->username, target_p->host, !MyConnect(target_p));
876 SetUserHost(target_p);
877
878 if (MyClient(target_p))
879 {
880 sendto_one_numeric(target_p, &me, RPL_NEWHOSTIS, target_p->host);
881 clear_ban_cache_client(target_p);
882 }
883
884 if (!ConfigFileEntry.cycle_on_host_change)
885 return;
886
887 DLINK_FOREACH(ptr, target_p->channel.head)
888 {
889 char modebuf[4], nickbuf[NICKLEN * 3 + 3] = "";
890 char *p = modebuf;
891 int len = 0;
892 const struct Membership *ms = ptr->data;
893
894 if (has_member_flags(ms, CHFL_CHANOP))
895 {
896 *p++ = 'o';
897 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
898 }
899
900 if (has_member_flags(ms, CHFL_HALFOP))
901 {
902 *p++ = 'h';
903 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
904 }
905
906 if (has_member_flags(ms, CHFL_VOICE))
907 {
908 *p++ = 'v';
909 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
910 }
911
912 *p = '\0';
913
914 sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s!%s@%s JOIN :%s",
915 target_p->name, target_p->username, target_p->host,
916 ms->chptr->chname);
917 if (nickbuf[0])
918 sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s MODE %s +%s %s",
919 target_p->servptr->name, ms->chptr->chname,
920 modebuf, nickbuf);
921
922 }
923
924 if (target_p->away[0])
925 sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY,
926 ":%s!%s@%s AWAY :%s",
927 target_p->name, target_p->username,
928 target_p->host, target_p->away);
929 }
930
931 /*! \brief Blindly opers up given source_p, using conf info.
932 * All checks on passwords have already been done.
933 * \param source_p Pointer to given client to oper
934 */
935 void
936 oper_up(struct Client *source_p)
937 {
938 const unsigned int old = source_p->umodes;
939 const struct MaskItem *conf = source_p->localClient->confs.head->data;
940
941 assert(source_p->localClient->confs.head);
942
943 ++Count.oper;
944 SetOper(source_p);
945
946 if (conf->modes)
947 AddUMode(source_p, conf->modes);
948 else if (ConfigFileEntry.oper_umodes)
949 AddUMode(source_p, ConfigFileEntry.oper_umodes);
950
951 if (!(old & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE))
952 ++Count.invisi;
953 if ((old & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE))
954 --Count.invisi;
955
956 assert(dlinkFind(&oper_list, source_p) == NULL);
957 dlinkAdd(source_p, make_dlink_node(), &oper_list);
958
959 AddOFlag(source_p, conf->port);
960
961 if (HasOFlag(source_p, OPER_FLAG_ADMIN))
962 AddUMode(source_p, UMODE_ADMIN);
963
964 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s is now an operator",
965 get_oper_name(source_p));
966 send_umode_out(source_p, source_p, old);
967 sendto_one_numeric(source_p, &me, RPL_YOUREOPER);
968 }
969
970 static char new_uid[TOTALSIDUID + 1]; /* Allow for \0 */
971
972 int
973 valid_sid(const char *sid)
974 {
975 if (strlen(sid) == IRC_MAXSID)
976 if (IsDigit(*sid))
977 if (IsAlNum(*(sid + 1)) && IsAlNum(*(sid + 2)))
978 return 1;
979
980 return 0;
981 }
982
983 /*
984 * init_uid()
985 *
986 * inputs - NONE
987 * output - NONE
988 * side effects - new_uid is filled in with server id portion (sid)
989 * (first 3 bytes) or defaulted to 'A'.
990 * Rest is filled in with 'A'
991 */
992 void
993 init_uid(void)
994 {
995 memset(new_uid, 0, sizeof(new_uid));
996
997 if (!EmptyString(ServerInfo.sid))
998 strlcpy(new_uid, ServerInfo.sid, sizeof(new_uid));
999
1000 for (unsigned int i = 0; i < IRC_MAXSID; ++i)
1001 if (new_uid[i] == '\0')
1002 new_uid[i] = 'A';
1003
1004 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1005 memcpy(new_uid + IRC_MAXSID, "AAAAA@", IRC_MAXUID);
1006 }
1007
1008 /*
1009 * add_one_to_uid
1010 *
1011 * inputs - index number into new_uid
1012 * output - NONE
1013 * side effects - new_uid is incremented by one
1014 * note this is a recursive function
1015 */
1016 static void
1017 add_one_to_uid(unsigned int i)
1018 {
1019 if (i != IRC_MAXSID) /* Not reached server SID portion yet? */
1020 {
1021 if (new_uid[i] == 'Z')
1022 new_uid[i] = '0';
1023 else if (new_uid[i] == '9')
1024 {
1025 new_uid[i] = 'A';
1026 add_one_to_uid(i - 1);
1027 }
1028 else
1029 ++new_uid[i];
1030 }
1031 else
1032 {
1033 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1034 if (new_uid[i] == 'Z')
1035 memcpy(new_uid + IRC_MAXSID, "AAAAAA", IRC_MAXUID);
1036 else
1037 ++new_uid[i];
1038 }
1039 }
1040
1041 /*
1042 * uid_get
1043 *
1044 * inputs - struct Client *
1045 * output - new UID is returned to caller
1046 * side effects - new_uid is incremented by one.
1047 */
1048 static const char *
1049 uid_get(void)
1050 {
1051 add_one_to_uid(TOTALSIDUID - 1); /* Index from 0 */
1052 return new_uid;
1053 }
1054
1055 /*
1056 * init_isupport()
1057 *
1058 * input - NONE
1059 * output - NONE
1060 * side effects - Must be called before isupport is enabled
1061 */
1062 void
1063 init_isupport(void)
1064 {
1065 add_isupport("CALLERID", NULL, -1);
1066 add_isupport("CASEMAPPING", "rfc1459", -1);
1067 add_isupport("DEAF", "D", -1);
1068 add_isupport("KICKLEN", NULL, KICKLEN);
1069 add_isupport("MODES", NULL, MAXMODEPARAMS);
1070 add_isupport("PREFIX", "(ohv)@%+", -1);
1071 add_isupport("STATUSMSG", "@%+", -1);
1072 add_isupport("EXCEPTS", "e", -1);
1073 add_isupport("INVEX", "I", -1);
1074 }
1075
1076 /*
1077 * add_isupport()
1078 *
1079 * input - name of supported function
1080 * - options if any
1081 * - number if any
1082 * output - NONE
1083 * side effects - Each supported item must call this when activated
1084 */
1085 void
1086 add_isupport(const char *name, const char *options, int n)
1087 {
1088 dlink_node *ptr;
1089 struct Isupport *support = NULL;
1090
1091 DLINK_FOREACH(ptr, support_list.head)
1092 {
1093 support = ptr->data;
1094 if (irccmp(support->name, name) == 0)
1095 {
1096 MyFree(support->name);
1097 MyFree(support->options);
1098 break;
1099 }
1100 }
1101
1102 if (ptr == NULL)
1103 {
1104 support = MyCalloc(sizeof(*support));
1105 dlinkAddTail(support, &support->node, &support_list);
1106 }
1107
1108 support->name = xstrdup(name);
1109 if (options)
1110 support->options = xstrdup(options);
1111 support->number = n;
1112
1113 rebuild_isupport_message_line();
1114 }
1115
1116 /*
1117 * delete_isupport()
1118 *
1119 * input - name of supported function
1120 * output - NONE
1121 * side effects - Each supported item must call this when deactivated
1122 */
1123 void
1124 delete_isupport(const char *name)
1125 {
1126 dlink_node *ptr;
1127 struct Isupport *support;
1128
1129 DLINK_FOREACH(ptr, support_list.head)
1130 {
1131 support = ptr->data;
1132 if (irccmp(support->name, name) == 0)
1133 {
1134 dlinkDelete(ptr, &support_list);
1135 MyFree(support->name);
1136 MyFree(support->options);
1137 MyFree(support);
1138 break;
1139 }
1140 }
1141
1142 rebuild_isupport_message_line();
1143 }
1144
1145 /*
1146 * rebuild_isupport_message_line
1147 *
1148 * input - NONE
1149 * output - NONE
1150 * side effects - Destroy the isupport MessageFile lines, and rebuild.
1151 */
1152 void
1153 rebuild_isupport_message_line(void)
1154 {
1155 char isupportbuffer[IRCD_BUFSIZE];
1156 char *p = isupportbuffer;
1157 dlink_node *ptr = NULL, *ptr_next = NULL;
1158 int n = 0;
1159 int tokens = 0;
1160 size_t len = 0;
1161 size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));
1162
1163 DLINK_FOREACH_SAFE(ptr, ptr_next, support_list_lines.head)
1164 {
1165 dlinkDelete(ptr, &support_list_lines);
1166 MyFree(ptr->data);
1167 free_dlink_node(ptr);
1168 }
1169
1170 DLINK_FOREACH(ptr, support_list.head)
1171 {
1172 struct Isupport *support = ptr->data;
1173
1174 p += (n = sprintf(p, "%s", support->name));
1175 len += n;
1176
1177 if (support->options)
1178 {
1179 p += (n = sprintf(p, "=%s", support->options));
1180 len += n;
1181 }
1182
1183 if (support->number > 0)
1184 {
1185 p += (n = sprintf(p, "=%d", support->number));
1186 len += n;
1187 }
1188
1189 *p++ = ' ';
1190 len++;
1191 *p = '\0';
1192
1193 if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
1194 { /* arbritrary for now */
1195 if (*--p == ' ')
1196 *p = '\0';
1197
1198 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1199 p = isupportbuffer;
1200 len = 0;
1201 n = tokens = 0;
1202 }
1203 }
1204
1205 if (len)
1206 {
1207 if (*--p == ' ')
1208 *p = '\0';
1209 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1210 }
1211 }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision