/[svn]/ircd-hybrid/branches/8.2.x/src/user.c
ViewVC logotype

Contents of /ircd-hybrid/branches/8.2.x/src/user.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 4705 - (show annotations)
Sun Oct 5 16:25:18 2014 UTC (5 years, 9 months ago) by michael
File MIME type: text/x-chdr
File size: 32505 byte(s)
- user.c:send_umode(): even if source_p == client_p, don't pass both client_p and
  source_p as arguments

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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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_server_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, local_server_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->connection->fd.ssl));
352 }
353 #endif
354
355 sendto_one_numeric(source_p, &me, RPL_WELCOME, ConfigServerInfo.network_name,
356 source_p->name);
357 sendto_one_numeric(source_p, &me, RPL_YOURHOST,
358 get_listener_name(source_p->connection->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 sendto_one_numeric(source_p, &me, RPL_YOURID, source_p->id);
363
364 show_lusers(source_p);
365 motd_signon(source_p);
366 }
367
368 /* check_xline()
369 *
370 * inputs - pointer to client to test
371 * outupt - 1 if exiting 0 if ok
372 * side effects -
373 */
374 static int
375 check_xline(struct Client *source_p)
376 {
377 struct MaskItem *conf = NULL;
378 const char *reason = NULL;
379
380 if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0)))
381 {
382 ++conf->count;
383
384 if (conf->reason)
385 reason = conf->reason;
386 else
387 reason = CONF_NOREASON;
388
389 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
390 "X-line Rejecting [%s] [%s], user %s [%s]",
391 source_p->info, reason,
392 get_client_name(source_p, HIDE_IP),
393 source_p->sockhost);
394
395 ++ServerStats.is_ref;
396 exit_client(source_p, "Bad user info");
397 return 1;
398 }
399
400 return 0;
401 }
402
403 /*! \brief This function is called when both NICK and USER messages
404 * have been accepted for the client, in whatever order. Only
405 * after this, is the UID message propagated.
406 * \param source_p Pointer to given client to introduce
407 */
408 void
409 register_local_user(struct Client *source_p)
410 {
411 const char *id = NULL;
412 const struct MaskItem *conf = NULL;
413
414 assert(source_p == source_p->from);
415 assert(MyConnect(source_p));
416 assert(!source_p->connection->registration);
417
418 ClearCap(source_p, CAP_TS6);
419
420 if (ConfigGeneral.ping_cookie)
421 {
422 if (!IsPingSent(source_p) && !source_p->connection->random_ping)
423 {
424 do
425 source_p->connection->random_ping = genrand_int32();
426 while (!source_p->connection->random_ping);
427
428 sendto_one(source_p, "PING :%u",
429 source_p->connection->random_ping);
430 SetPingSent(source_p);
431 return;
432 }
433
434 if (!HasPingCookie(source_p))
435 return;
436 }
437
438 source_p->connection->last_privmsg = CurrentTime;
439 /* Straight up the maximum rate of flooding... */
440 source_p->connection->allow_read = MAX_FLOOD_BURST;
441
442 if (!check_client(source_p))
443 return;
444
445 if (!valid_hostname(source_p->host))
446 {
447 sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal "
448 "character in your hostname");
449 strlcpy(source_p->host, source_p->sockhost,
450 sizeof(source_p->host));
451 }
452
453 conf = source_p->connection->confs.head->data;
454
455 if (!IsGotId(source_p))
456 {
457 char username[USERLEN + 1] = "";
458 const char *p = username;
459 unsigned int i = 0;
460
461 if (IsNeedIdentd(conf))
462 {
463 ++ServerStats.is_ref;
464 sendto_one_notice(source_p, &me, ":*** Notice -- You need to install "
465 "identd to use this server");
466 exit_client(source_p, "Install identd");
467 return;
468 }
469
470 strlcpy(username, source_p->username, sizeof(username));
471
472 if (!IsNoTilde(conf))
473 source_p->username[i++] = '~';
474
475 for (; *p && i < USERLEN; ++p)
476 source_p->username[i++] = *p;
477
478 source_p->username[i] = '\0';
479 }
480
481 /* Password check */
482 if (!EmptyString(conf->passwd))
483 {
484 if (!match_conf_password(source_p->connection->password, conf))
485 {
486 ++ServerStats.is_ref;
487
488 sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH);
489 exit_client(source_p, "Bad Password");
490 return;
491 }
492 }
493
494 /*
495 * Don't free source_p->connection->password here - it can be required
496 * by masked /stats I if there are auth{} blocks with need_password = no;
497 * --adx
498 */
499
500 /*
501 * Report if user has &^>= etc. and set flags as needed in source_p
502 */
503 report_and_set_user_flags(source_p, conf);
504
505 if (IsDead(source_p))
506 return;
507
508 /*
509 * Limit clients -
510 * We want to be able to have servers and F-line clients
511 * connect, so save room for "buffer" connections.
512 * Smaller servers may want to decrease this, and it should
513 * probably be just a percentage of the MAXCLIENTS...
514 * -Taner
515 */
516 if ((Count.local >= ConfigServerInfo.max_clients + MAX_BUFFER) ||
517 (Count.local >= ConfigServerInfo.max_clients && !IsExemptLimits(source_p)))
518 {
519 sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE,
520 "Too many clients, rejecting %s[%s].",
521 source_p->name, source_p->host);
522 ++ServerStats.is_ref;
523 exit_client(source_p, "Sorry, server is full - try later");
524 return;
525 }
526
527 if (!valid_username(source_p->username, 1))
528 {
529 char buf[IRCD_BUFSIZE] = "";
530
531 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
532 "Invalid username: %s (%s@%s)",
533 source_p->name, source_p->username, source_p->host);
534 ++ServerStats.is_ref;
535 snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username);
536 exit_client(source_p, buf);
537 return;
538 }
539
540 if (check_xline(source_p))
541 return;
542
543 while (hash_find_id((id = uid_get())))
544 ;
545
546 strlcpy(source_p->id, id, sizeof(source_p->id));
547 hash_add_id(source_p);
548
549 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
550 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>",
551 source_p->name, source_p->username, source_p->host,
552 ConfigGeneral.hide_spoof_ips && IsIPSpoof(source_p) ?
553 "255.255.255.255" : source_p->sockhost,
554 get_client_class(&source_p->connection->confs),
555 source_p->info, source_p->id);
556
557 if (ConfigGeneral.invisible_on_connect)
558 {
559 AddUMode(source_p, UMODE_INVISIBLE);
560 ++Count.invisi;
561 }
562
563 if (++Count.local > Count.max_loc)
564 {
565 Count.max_loc = Count.local;
566
567 if (!(Count.max_loc % 10))
568 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
569 "New maximum local client connections: %u",
570 Count.max_loc);
571 }
572
573 if (++Count.total > Count.max_tot)
574 Count.max_tot = Count.total;
575 ++Count.totalrestartcount;
576
577 assert(source_p->servptr == &me);
578 SetClient(source_p);
579 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
580 dlinkAdd(source_p, &source_p->node, &global_client_list);
581
582 assert(dlinkFind(&unknown_list, source_p));
583
584 dlink_move_node(&source_p->connection->lclient_node,
585 &unknown_list, &local_client_list);
586
587 user_welcome(source_p);
588 add_user_host(source_p->username, source_p->host, 0);
589 SetUserHost(source_p);
590
591 introduce_client(source_p);
592 }
593
594 /* register_remote_user()
595 *
596 * inputs - source_p remote or directly connected client
597 * - username to register as
598 * - host name to register as
599 * - server name
600 * output - NONE
601 * side effects - This function is called when a remote client
602 * is introduced by a server.
603 */
604 void
605 register_remote_user(struct Client *source_p)
606 {
607 const struct Client *target_p = NULL;
608
609 if ((target_p = source_p->servptr) && target_p->from != source_p->from)
610 {
611 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
612 "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
613 source_p->from->name, source_p->name, source_p->username,
614 source_p->host, source_p->servptr->name,
615 target_p->name, target_p->from->name);
616 sendto_one(source_p->from,
617 ":%s KILL %s :%s (NICK from wrong direction (%s != %s))",
618 me.id, source_p->id, me.name, source_p->servptr->name,
619 target_p->from->name);
620
621 AddFlag(source_p, FLAGS_KILLED);
622 exit_client(source_p, "USER server wrong direction");
623 return;
624 }
625
626 /*
627 * If the nick has been introduced by a services server,
628 * make it a service as well.
629 */
630 if (HasFlag(source_p->servptr, FLAGS_SERVICE))
631 AddFlag(source_p, FLAGS_SERVICE);
632
633 if (++Count.total > Count.max_tot)
634 Count.max_tot = Count.total;
635
636 SetClient(source_p);
637 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
638 dlinkAdd(source_p, &source_p->node, &global_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 == '.' && ConfigGeneral.dots_in_ident)
713 {
714 if (++dots > ConfigGeneral.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 client_p->name, client_p->username,
818 client_p->host, client_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 (ConfigGeneral.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_VISIBLEHOST, target_p->host);
881 clear_ban_cache_client(target_p);
882 }
883
884 if (!ConfigGeneral.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->name);
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->name,
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->connection->confs.head->data;
940
941 assert(source_p->connection->confs.head);
942
943 ++Count.oper;
944 SetOper(source_p);
945
946 if (conf->modes)
947 AddUMode(source_p, conf->modes);
948 else if (ConfigGeneral.oper_umodes)
949 AddUMode(source_p, ConfigGeneral.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 sendto_server(NULL, NOCAPS, NOCAPS, ":%s GLOBOPS :%s is now an operator",
967 me.id, get_oper_name(source_p));
968 send_umode_out(source_p, source_p, old);
969 sendto_one_numeric(source_p, &me, RPL_YOUREOPER);
970 }
971
972 static char new_uid[TOTALSIDUID + 1]; /* Allow for \0 */
973
974 int
975 valid_sid(const char *sid)
976 {
977 if (strlen(sid) == IRC_MAXSID)
978 if (IsDigit(*sid))
979 if (IsAlNum(*(sid + 1)) && IsAlNum(*(sid + 2)))
980 return 1;
981
982 return 0;
983 }
984
985 /*
986 * init_uid()
987 *
988 * inputs - NONE
989 * output - NONE
990 * side effects - new_uid is filled in with server id portion (sid)
991 * (first 3 bytes) or defaulted to 'A'.
992 * Rest is filled in with 'A'
993 */
994 void
995 init_uid(void)
996 {
997 memset(new_uid, 0, sizeof(new_uid));
998
999 if (!EmptyString(ConfigServerInfo.sid))
1000 strlcpy(new_uid, ConfigServerInfo.sid, sizeof(new_uid));
1001
1002 for (unsigned int i = 0; i < IRC_MAXSID; ++i)
1003 if (new_uid[i] == '\0')
1004 new_uid[i] = 'A';
1005
1006 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1007 memcpy(new_uid + IRC_MAXSID, "AAAAA@", IRC_MAXUID);
1008 }
1009
1010 /*
1011 * add_one_to_uid
1012 *
1013 * inputs - index number into new_uid
1014 * output - NONE
1015 * side effects - new_uid is incremented by one
1016 * note this is a recursive function
1017 */
1018 static void
1019 add_one_to_uid(unsigned int i)
1020 {
1021 if (i != IRC_MAXSID) /* Not reached server SID portion yet? */
1022 {
1023 if (new_uid[i] == 'Z')
1024 new_uid[i] = '0';
1025 else if (new_uid[i] == '9')
1026 {
1027 new_uid[i] = 'A';
1028 add_one_to_uid(i - 1);
1029 }
1030 else
1031 ++new_uid[i];
1032 }
1033 else
1034 {
1035 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1036 if (new_uid[i] == 'Z')
1037 memcpy(new_uid + IRC_MAXSID, "AAAAAA", IRC_MAXUID);
1038 else
1039 ++new_uid[i];
1040 }
1041 }
1042
1043 /*
1044 * uid_get
1045 *
1046 * inputs - struct Client *
1047 * output - new UID is returned to caller
1048 * side effects - new_uid is incremented by one.
1049 */
1050 static const char *
1051 uid_get(void)
1052 {
1053 add_one_to_uid(TOTALSIDUID - 1); /* Index from 0 */
1054 return new_uid;
1055 }
1056
1057 /*
1058 * init_isupport()
1059 *
1060 * input - NONE
1061 * output - NONE
1062 * side effects - Must be called before isupport is enabled
1063 */
1064 void
1065 init_isupport(void)
1066 {
1067 add_isupport("CALLERID", NULL, -1);
1068 add_isupport("CASEMAPPING", "rfc1459", -1);
1069 add_isupport("DEAF", "D", -1);
1070 add_isupport("KICKLEN", NULL, KICKLEN);
1071 add_isupport("MODES", NULL, MAXMODEPARAMS);
1072 add_isupport("PREFIX", "(ohv)@%+", -1);
1073 add_isupport("STATUSMSG", "@%+", -1);
1074 add_isupport("EXCEPTS", "e", -1);
1075 add_isupport("INVEX", "I", -1);
1076 }
1077
1078 /*
1079 * add_isupport()
1080 *
1081 * input - name of supported function
1082 * - options if any
1083 * - number if any
1084 * output - NONE
1085 * side effects - Each supported item must call this when activated
1086 */
1087 void
1088 add_isupport(const char *name, const char *options, int n)
1089 {
1090 dlink_node *ptr;
1091 struct Isupport *support = NULL;
1092
1093 DLINK_FOREACH(ptr, support_list.head)
1094 {
1095 support = ptr->data;
1096 if (irccmp(support->name, name) == 0)
1097 {
1098 MyFree(support->name);
1099 MyFree(support->options);
1100 break;
1101 }
1102 }
1103
1104 if (ptr == NULL)
1105 {
1106 support = MyCalloc(sizeof(*support));
1107 dlinkAddTail(support, &support->node, &support_list);
1108 }
1109
1110 support->name = xstrdup(name);
1111 if (options)
1112 support->options = xstrdup(options);
1113 support->number = n;
1114
1115 rebuild_isupport_message_line();
1116 }
1117
1118 /*
1119 * delete_isupport()
1120 *
1121 * input - name of supported function
1122 * output - NONE
1123 * side effects - Each supported item must call this when deactivated
1124 */
1125 void
1126 delete_isupport(const char *name)
1127 {
1128 dlink_node *ptr;
1129 struct Isupport *support;
1130
1131 DLINK_FOREACH(ptr, support_list.head)
1132 {
1133 support = ptr->data;
1134 if (irccmp(support->name, name) == 0)
1135 {
1136 dlinkDelete(ptr, &support_list);
1137 MyFree(support->name);
1138 MyFree(support->options);
1139 MyFree(support);
1140 break;
1141 }
1142 }
1143
1144 rebuild_isupport_message_line();
1145 }
1146
1147 /*
1148 * rebuild_isupport_message_line
1149 *
1150 * input - NONE
1151 * output - NONE
1152 * side effects - Destroy the isupport MessageFile lines, and rebuild.
1153 */
1154 void
1155 rebuild_isupport_message_line(void)
1156 {
1157 char isupportbuffer[IRCD_BUFSIZE];
1158 char *p = isupportbuffer;
1159 dlink_node *ptr = NULL, *ptr_next = NULL;
1160 int n = 0;
1161 int tokens = 0;
1162 size_t len = 0;
1163 size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));
1164
1165 DLINK_FOREACH_SAFE(ptr, ptr_next, support_list_lines.head)
1166 {
1167 dlinkDelete(ptr, &support_list_lines);
1168 MyFree(ptr->data);
1169 free_dlink_node(ptr);
1170 }
1171
1172 DLINK_FOREACH(ptr, support_list.head)
1173 {
1174 struct Isupport *support = ptr->data;
1175
1176 p += (n = sprintf(p, "%s", support->name));
1177 len += n;
1178
1179 if (support->options)
1180 {
1181 p += (n = sprintf(p, "=%s", support->options));
1182 len += n;
1183 }
1184
1185 if (support->number > 0)
1186 {
1187 p += (n = sprintf(p, "=%d", support->number));
1188 len += n;
1189 }
1190
1191 *p++ = ' ';
1192 len++;
1193 *p = '\0';
1194
1195 if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
1196 { /* arbritrary for now */
1197 if (*--p == ' ')
1198 *p = '\0';
1199
1200 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1201 p = isupportbuffer;
1202 len = 0;
1203 n = tokens = 0;
1204 }
1205 }
1206
1207 if (len)
1208 {
1209 if (*--p == ' ')
1210 *p = '\0';
1211 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1212 }
1213 }

Properties

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

svnadmin@ircd-hybrid.org
ViewVC Help
Powered by ViewVC 1.1.28