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root/svn/ircd-hybrid/branches/8.2.x/src/user.c
Revision: 3110
Committed: Thu Mar 6 20:33:17 2014 UTC (10 years ago) by michael
Content type: text/x-csrc
Original Path: ircd-hybrid/trunk/src/s_user.c
File size: 39713 byte(s)
Log Message:
- Added sendto_one_notice()

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 "s_user.h"
30 #include "s_misc.h"
31 #include "channel.h"
32 #include "channel_mode.h"
33 #include "client.h"
34 #include "fdlist.h"
35 #include "hash.h"
36 #include "irc_string.h"
37 #include "s_bsd.h"
38 #include "ircd.h"
39 #include "listener.h"
40 #include "motd.h"
41 #include "numeric.h"
42 #include "conf.h"
43 #include "log.h"
44 #include "s_serv.h"
45 #include "send.h"
46 #include "supported.h"
47 #include "whowas.h"
48 #include "memory.h"
49 #include "packet.h"
50 #include "rng_mt.h"
51 #include "userhost.h"
52 #include "hook.h"
53 #include "s_misc.h"
54 #include "parse.h"
55 #include "watch.h"
56
57 static char umode_buffer[IRCD_BUFSIZE];
58
59 static void user_welcome(struct Client *);
60 static void report_and_set_user_flags(struct Client *, const struct MaskItem *);
61 static int check_xline(struct Client *);
62 static void introduce_client(struct Client *);
63 static const char *uid_get(void);
64
65 /* Used for building up the isupport string,
66 * used with init_isupport, add_isupport, delete_isupport
67 */
68
69 struct Isupport
70 {
71 dlink_node node;
72 char *name;
73 char *options;
74 int number;
75 };
76
77 static dlink_list support_list;
78 static dlink_list support_list_lines;
79
80 /* memory is cheap. map 0-255 to equivalent mode */
81 const unsigned int user_modes[256] =
82 {
83 /* 0x00 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x0F */
84 /* 0x10 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x1F */
85 /* 0x20 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x2F */
86 /* 0x30 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x3F */
87 0, /* @ */
88 0, /* A */
89 0, /* B */
90 0, /* C */
91 UMODE_DEAF, /* D */
92 0, /* E */
93 UMODE_FARCONNECT, /* F */
94 UMODE_SOFTCALLERID, /* G */
95 UMODE_HIDDEN, /* H */
96 0, /* I */
97 0, /* J */
98 0, /* K */
99 0, /* L */
100 0, /* M */
101 0, /* N */
102 0, /* O */
103 0, /* P */
104 0, /* Q */
105 UMODE_REGONLY, /* R */
106 UMODE_SSL, /* S */
107 0, /* T */
108 0, /* U */
109 0, /* V */
110 UMODE_WEBIRC, /* W */
111 0, /* X */
112 0, /* Y */
113 0, /* Z 0x5A */
114 0, 0, 0, 0, 0, /* 0x5F */
115 0, /* 0x60 */
116 UMODE_ADMIN, /* a */
117 UMODE_BOTS, /* b */
118 UMODE_CCONN, /* c */
119 UMODE_DEBUG, /* d */
120 UMODE_EXTERNAL, /* e */
121 UMODE_FULL, /* f */
122 UMODE_CALLERID, /* g */
123 0, /* h */
124 UMODE_INVISIBLE, /* i */
125 UMODE_REJ, /* j */
126 UMODE_SKILL, /* k */
127 UMODE_LOCOPS, /* l */
128 0, /* m */
129 UMODE_NCHANGE, /* n */
130 UMODE_OPER, /* o */
131 0, /* p */
132 0, /* q */
133 UMODE_REGISTERED, /* r */
134 UMODE_SERVNOTICE, /* s */
135 0, /* t */
136 UMODE_UNAUTH, /* u */
137 0, /* v */
138 UMODE_WALLOP, /* w */
139 UMODE_HIDDENHOST, /* x */
140 UMODE_SPY, /* y */
141 UMODE_OPERWALL, /* z 0x7A */
142 0,0,0,0,0, /* 0x7B - 0x7F */
143
144 /* 0x80 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x8F */
145 /* 0x90 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x9F */
146 /* 0xA0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xAF */
147 /* 0xB0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xBF */
148 /* 0xC0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xCF */
149 /* 0xD0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xDF */
150 /* 0xE0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xEF */
151 /* 0xF0 */ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 /* 0xFF */
152 };
153
154 void
155 assemble_umode_buffer(void)
156 {
157 unsigned int idx = 0;
158 char *umode_buffer_ptr = umode_buffer;
159
160 for (; idx < (sizeof(user_modes) / sizeof(user_modes[0])); ++idx)
161 if (user_modes[idx])
162 *umode_buffer_ptr++ = idx;
163
164 *umode_buffer_ptr = '\0';
165 }
166
167 /* show_lusers()
168 *
169 * inputs - pointer to client
170 * output - NONE
171 * side effects - display to client user counts etc.
172 */
173 void
174 show_lusers(struct Client *source_p)
175 {
176 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
177 sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total-Count.invisi),
178 Count.invisi, dlink_list_length(&global_serv_list));
179 else
180 sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT,
181 (Count.total-Count.invisi), Count.invisi, 1);
182
183 if (Count.oper > 0)
184 sendto_one_numeric(source_p, &me, RPL_LUSEROP, Count.oper);
185
186 if (dlink_list_length(&unknown_list) > 0)
187 sendto_one_numeric(source_p, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list));
188
189 if (dlink_list_length(&global_channel_list) > 0)
190 sendto_one_numeric(source_p, &me, RPL_LUSERCHANNELS, dlink_list_length(&global_channel_list));
191
192 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
193 {
194 sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.local, Count.myserver);
195 sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.local, Count.max_loc);
196 }
197 else
198 {
199 sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.total, 0);
200 sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.total, Count.max_tot);
201 }
202
203 sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot);
204
205 if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER))
206 sendto_one_numeric(source_p, &me, RPL_STATSCONN, Count.max_loc_con,
207 Count.max_loc_cli, Count.totalrestartcount);
208
209 if (Count.local > Count.max_loc_cli)
210 Count.max_loc_cli = Count.local;
211
212 if ((Count.local + Count.myserver) > Count.max_loc_con)
213 Count.max_loc_con = Count.local + Count.myserver;
214 }
215
216 /* show_isupport()
217 *
218 * inputs - pointer to client
219 * output - NONE
220 * side effects - display to client what we support (for them)
221 */
222 void
223 show_isupport(struct Client *source_p)
224 {
225 const dlink_node *ptr = NULL;
226
227 DLINK_FOREACH(ptr, support_list_lines.head)
228 sendto_one_numeric(source_p, &me, RPL_ISUPPORT, ptr->data);
229 }
230
231 /*
232 ** register_local_user
233 ** This function is called when both NICK and USER messages
234 ** have been accepted for the client, in whatever order. Only
235 ** after this, is the USER message propagated.
236 **
237 ** NICK's must be propagated at once when received, although
238 ** it would be better to delay them too until full info is
239 ** available. Doing it is not so simple though, would have
240 ** to implement the following:
241 **
242 ** (actually it has been implemented already for a while) -orabidoo
243 **
244 ** 1) user telnets in and gives only "NICK foobar" and waits
245 ** 2) another user far away logs in normally with the nick
246 ** "foobar" (quite legal, as this server didn't propagate
247 ** it).
248 ** 3) now this server gets nick "foobar" from outside, but
249 ** has alread the same defined locally. Current server
250 ** would just issue "KILL foobar" to clean out dups. But,
251 ** this is not fair. It should actually request another
252 ** nick from local user or kill him/her...
253 */
254 void
255 register_local_user(struct Client *source_p)
256 {
257 const char *id = NULL;
258 const struct MaskItem *conf = NULL;
259
260 assert(source_p != NULL);
261 assert(source_p == source_p->from);
262 assert(MyConnect(source_p));
263 assert(!source_p->localClient->registration);
264
265 ClearCap(source_p, CAP_TS6);
266
267 if (ConfigFileEntry.ping_cookie)
268 {
269 if (!IsPingSent(source_p) && !source_p->localClient->random_ping)
270 {
271 do
272 source_p->localClient->random_ping = genrand_int32();
273 while (!source_p->localClient->random_ping);
274
275 sendto_one(source_p, "PING :%u",
276 source_p->localClient->random_ping);
277 SetPingSent(source_p);
278 return;
279 }
280
281 if (!HasPingCookie(source_p))
282 return;
283 }
284
285 source_p->localClient->last_privmsg = CurrentTime;
286 /* Straight up the maximum rate of flooding... */
287 source_p->localClient->allow_read = MAX_FLOOD_BURST;
288
289 if (!check_client(source_p))
290 return;
291
292 if (!valid_hostname(source_p->host))
293 {
294 sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal "
295 "character in your hostname");
296 strlcpy(source_p->host, source_p->sockhost,
297 sizeof(source_p->host));
298 }
299
300 conf = source_p->localClient->confs.head->data;
301
302 if (!IsGotId(source_p))
303 {
304 char username[USERLEN + 1];
305 const char *p = username;
306 unsigned int i = 0;
307
308 if (IsNeedIdentd(conf))
309 {
310 ++ServerStats.is_ref;
311 sendto_one_notice(source_p, &me, ":*** Notice -- You need to install "
312 "identd to use this server");
313 exit_client(source_p, &me, "Install identd");
314 return;
315 }
316
317 strlcpy(username, source_p->username, sizeof(username));
318
319 if (!IsNoTilde(conf))
320 source_p->username[i++] = '~';
321
322 for (; *p && i < USERLEN; ++p)
323 if (*p != '[')
324 source_p->username[i++] = *p;
325
326 source_p->username[i] = '\0';
327 }
328
329 /* password check */
330 if (!EmptyString(conf->passwd))
331 {
332 const char *pass = source_p->localClient->passwd;
333
334 if (!match_conf_password(pass, conf))
335 {
336 ++ServerStats.is_ref;
337
338 sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH);
339 exit_client(source_p, &me, "Bad Password");
340 return;
341 }
342 }
343
344 /* don't free source_p->localClient->passwd here - it can be required
345 * by masked /stats I if there are auth{} blocks with need_password = no;
346 * --adx
347 */
348
349 /* report if user has &^>= etc. and set flags as needed in source_p */
350 report_and_set_user_flags(source_p, conf);
351
352 if (IsDead(source_p))
353 return;
354
355 /* Limit clients -
356 * We want to be able to have servers and F-line clients
357 * connect, so save room for "buffer" connections.
358 * Smaller servers may want to decrease this, and it should
359 * probably be just a percentage of the MAXCLIENTS...
360 * -Taner
361 */
362 /* Except "F:" clients */
363 if ((Count.local >= ServerInfo.max_clients + MAX_BUFFER) ||
364 (Count.local >= ServerInfo.max_clients && !IsExemptLimits(source_p)))
365 {
366 sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE,
367 "Too many clients, rejecting %s[%s].",
368 source_p->name, source_p->host);
369 ++ServerStats.is_ref;
370 exit_client(source_p, &me, "Sorry, server is full - try later");
371 return;
372 }
373
374 /* valid user name check */
375 if (!valid_username(source_p->username, 1))
376 {
377 char tmpstr2[IRCD_BUFSIZE];
378
379 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
380 "Invalid username: %s (%s@%s)",
381 source_p->name, source_p->username, source_p->host);
382 ++ServerStats.is_ref;
383 snprintf(tmpstr2, sizeof(tmpstr2), "Invalid username [%s]",
384 source_p->username);
385 exit_client(source_p, &me, tmpstr2);
386 return;
387 }
388
389 if (check_xline(source_p))
390 return;
391
392 while (hash_find_id((id = uid_get())) != NULL)
393 ;
394
395 strlcpy(source_p->id, id, sizeof(source_p->id));
396 hash_add_id(source_p);
397
398 sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE,
399 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>",
400 source_p->name, source_p->username, source_p->host,
401 ConfigFileEntry.hide_spoof_ips && IsIPSpoof(source_p) ?
402 "255.255.255.255" : source_p->sockhost,
403 get_client_class(&source_p->localClient->confs),
404 source_p->info, source_p->id);
405
406 if (ConfigFileEntry.invisible_on_connect)
407 {
408 AddUMode(source_p, UMODE_INVISIBLE);
409 ++Count.invisi;
410 }
411
412 if (++Count.local > Count.max_loc)
413 {
414 Count.max_loc = Count.local;
415
416 if (!(Count.max_loc % 10))
417 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
418 "New Max Local Clients: %d",
419 Count.max_loc);
420 }
421
422 /* Increment our total user count here */
423 if (++Count.total > Count.max_tot)
424 Count.max_tot = Count.total;
425 ++Count.totalrestartcount;
426
427 assert(source_p->servptr == &me);
428 SetClient(source_p);
429 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
430
431 source_p->localClient->allow_read = MAX_FLOOD_BURST;
432
433 assert(dlinkFind(&unknown_list, source_p));
434
435 dlink_move_node(&source_p->localClient->lclient_node,
436 &unknown_list, &local_client_list);
437
438 user_welcome(source_p);
439 add_user_host(source_p->username, source_p->host, 0);
440 SetUserHost(source_p);
441
442 introduce_client(source_p);
443 }
444
445 /* register_remote_user()
446 *
447 * inputs - source_p remote or directly connected client
448 * - username to register as
449 * - host name to register as
450 * - server name
451 * output - NONE
452 * side effects - This function is called when a remote client
453 * is introduced by a server.
454 */
455 void
456 register_remote_user(struct Client *source_p, const char *username,
457 const char *host, const char *server)
458 {
459 struct Client *target_p = NULL;
460
461 assert(source_p != NULL);
462 assert(source_p->username != username);
463
464 strlcpy(source_p->host, host, sizeof(source_p->host));
465 strlcpy(source_p->username, username, sizeof(source_p->username));
466
467 /*
468 * coming from another server, take the servers word for it
469 */
470 source_p->servptr = hash_find_server(server);
471
472 /*
473 * Super GhostDetect:
474 * If we can't find the server the user is supposed to be on,
475 * then simply blow the user away. -Taner
476 */
477 if (source_p->servptr == NULL)
478 {
479 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
480 "No server %s for user %s[%s@%s] from %s",
481 server, source_p->name, source_p->username,
482 source_p->host, source_p->from->name);
483 kill_client(source_p->from, source_p, "%s (Server doesn't exist)", me.name);
484
485 AddFlag(source_p, FLAGS_KILLED);
486 exit_client(source_p, &me, "Ghosted Client");
487 return;
488 }
489
490 if ((target_p = source_p->servptr) && target_p->from != source_p->from)
491 {
492 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
493 "Bad User [%s] :%s USER %s@%s %s, != %s[%s]",
494 source_p->from->name, source_p->name, source_p->username,
495 source_p->host, source_p->servptr->name,
496 target_p->name, target_p->from->name);
497 kill_client(source_p->from, source_p,
498 "%s (NICK from wrong direction (%s != %s))",
499 me.name, source_p->servptr->name, target_p->from->name);
500 AddFlag(source_p, FLAGS_KILLED);
501 exit_client(source_p, &me, "USER server wrong direction");
502 return;
503 }
504
505 /*
506 * If the nick has been introduced by a services server,
507 * make it a service as well.
508 */
509 if (HasFlag(source_p->servptr, FLAGS_SERVICE))
510 AddFlag(source_p, FLAGS_SERVICE);
511
512 /* Increment our total user count here */
513 if (++Count.total > Count.max_tot)
514 Count.max_tot = Count.total;
515
516 SetClient(source_p);
517 dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list);
518 add_user_host(source_p->username, source_p->host, 1);
519 SetUserHost(source_p);
520
521 if (HasFlag(source_p->servptr, FLAGS_EOB))
522 sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE,
523 "Client connecting at %s: %s (%s@%s) [%s] <%s>",
524 source_p->servptr->name,
525 source_p->name, source_p->username, source_p->host,
526 source_p->info, source_p->id);
527
528 introduce_client(source_p);
529 }
530
531 /* introduce_client()
532 *
533 * inputs - source_p
534 * output - NONE
535 * side effects - This common function introduces a client to the rest
536 * of the net, either from a local client connect or
537 * from a remote connect.
538 */
539 static void
540 introduce_client(struct Client *source_p)
541 {
542 dlink_node *server_node = NULL;
543 char ubuf[IRCD_BUFSIZE];
544
545 if (MyClient(source_p))
546 send_umode(source_p, source_p, 0, SEND_UMODES, ubuf);
547 else
548 send_umode(NULL, source_p, 0, SEND_UMODES, ubuf);
549
550 watch_check_hash(source_p, RPL_LOGON);
551
552 if (ubuf[0] == '\0')
553 {
554 ubuf[0] = '+';
555 ubuf[1] = '\0';
556 }
557
558 DLINK_FOREACH(server_node, serv_list.head)
559 {
560 struct Client *server = server_node->data;
561
562 if (server == source_p->from)
563 continue;
564
565 if (IsCapable(server, CAP_SVS))
566 {
567 if (IsCapable(server, CAP_TS6) && HasID(source_p))
568 sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s %s :%s",
569 source_p->servptr->id,
570 source_p->name, source_p->hopcount+1,
571 (unsigned long)source_p->tsinfo,
572 ubuf, source_p->username, source_p->host,
573 (MyClient(source_p) && IsIPSpoof(source_p)) ?
574 "0" : source_p->sockhost, source_p->id,
575 source_p->svid,
576 source_p->info);
577 else
578 sendto_one(server, "NICK %s %d %lu %s %s %s %s %s :%s",
579 source_p->name, source_p->hopcount+1,
580 (unsigned long)source_p->tsinfo,
581 ubuf, source_p->username, source_p->host,
582 source_p->servptr->name, source_p->svid,
583 source_p->info);
584
585 }
586 else
587 {
588 if (IsCapable(server, CAP_TS6) && HasID(source_p))
589 sendto_one(server, ":%s UID %s %d %lu %s %s %s %s %s :%s",
590 source_p->servptr->id,
591 source_p->name, source_p->hopcount+1,
592 (unsigned long)source_p->tsinfo,
593 ubuf, source_p->username, source_p->host,
594 (MyClient(source_p) && IsIPSpoof(source_p)) ?
595 "0" : source_p->sockhost, source_p->id, source_p->info);
596 else
597 sendto_one(server, "NICK %s %d %lu %s %s %s %s :%s",
598 source_p->name, source_p->hopcount+1,
599 (unsigned long)source_p->tsinfo,
600 ubuf, source_p->username, source_p->host,
601 source_p->servptr->name, source_p->info);
602 }
603
604 if (!EmptyString(source_p->certfp))
605 sendto_one(server, ":%s CERTFP %s", ID(source_p), source_p->certfp);
606 }
607 }
608
609 /* valid_hostname()
610 *
611 * Inputs - pointer to hostname
612 * Output - 1 if valid, 0 if not
613 * Side effects - check hostname for validity
614 *
615 * NOTE: this doesn't allow a hostname to begin with a dot and
616 * will not allow more dots than chars.
617 */
618 int
619 valid_hostname(const char *hostname)
620 {
621 const char *p = hostname;
622
623 assert(p != NULL);
624
625 if (EmptyString(p) || *p == '.' || *p == ':')
626 return 0;
627
628 for (; *p; ++p)
629 if (!IsHostChar(*p))
630 return 0;
631
632 return p - hostname <= HOSTLEN;
633 }
634
635 /* valid_username()
636 *
637 * Inputs - pointer to user
638 * Output - 1 if valid, 0 if not
639 * Side effects - check username for validity
640 *
641 * Absolutely always reject any '*' '!' '?' '@' in an user name
642 * reject any odd control characters names.
643 * Allow '.' in username to allow for "first.last"
644 * style of username
645 */
646 int
647 valid_username(const char *username, const int local)
648 {
649 int dots = 0;
650 const char *p = username;
651
652 assert(p != NULL);
653
654 if (*p == '~')
655 ++p;
656
657 /*
658 * Reject usernames that don't start with an alphanum
659 * i.e. reject jokers who have '-@somehost' or '.@somehost'
660 * or "-hi-@somehost", "h-----@somehost" would still be accepted.
661 */
662 if (!IsAlNum(*p))
663 return 0;
664
665 if (local)
666 {
667 while (*++p)
668 {
669 if ((*p == '.') && ConfigFileEntry.dots_in_ident)
670 {
671 if (++dots > ConfigFileEntry.dots_in_ident)
672 return 0;
673 if (!IsUserChar(*(p + 1)))
674 return 0;
675 }
676 else if (!IsUserChar(*p))
677 return 0;
678 }
679 }
680 else
681 {
682 while (*++p)
683 if (!IsUserChar(*p))
684 return 0;
685 }
686
687 return p - username <= USERLEN;;
688 }
689
690 /* clean_nick_name()
691 *
692 * input - nickname
693 * - whether it's a local nick (1) or remote (0)
694 * output - none
695 * side effects - walks through the nickname, returning 0 if erroneous
696 */
697 int
698 valid_nickname(const char *nickname, const int local)
699 {
700 const char *p = nickname;
701 assert(nickname && *nickname);
702
703 /* nicks can't start with a digit or - or be 0 length */
704 /* This closer duplicates behaviour of hybrid-6 */
705 if (*p == '-' || (IsDigit(*p) && local) || *p == '\0')
706 return 0;
707
708 for (; *p; ++p)
709 if (!IsNickChar(*p))
710 return 0;
711
712 return p - nickname <= NICKLEN;
713 }
714
715 /* report_and_set_user_flags()
716 *
717 * inputs - pointer to source_p
718 * - pointer to conf for this user
719 * output - NONE
720 * side effects - Report to user any special flags
721 * they are getting, and set them.
722 */
723 static void
724 report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf)
725 {
726 /* If this user is being spoofed, tell them so */
727 if (IsConfDoSpoofIp(conf))
728 sendto_one_notice(source_p, &me, ":*** Spoofing your IP. Congrats.");
729
730 /* If this user is in the exception class, Set it "E lined" */
731 if (IsConfExemptKline(conf))
732 {
733 SetExemptKline(source_p);
734 sendto_one_notice(source_p, &me, ":*** You are exempt from K/D/G lines. Congrats.");
735 }
736
737 /*
738 * The else here is to make sure that G line exempt users
739 * do not get noticed twice.
740 */
741 else if (IsConfExemptGline(conf))
742 {
743 SetExemptGline(source_p);
744 sendto_one_notice(source_p, &me, ":*** You are exempt from G lines. Congrats.");
745 }
746
747 if (IsConfExemptResv(conf))
748 {
749 SetExemptResv(source_p);
750 sendto_one_notice(source_p, &me, ":*** You are exempt from resvs. Congrats.");
751 }
752
753 /* If this user is exempt from user limits set it "F lined" */
754 if (IsConfExemptLimits(conf))
755 {
756 SetExemptLimits(source_p);
757 sendto_one_notice(source_p, &me, ":*** You are exempt from user limits. Congrats.");
758 }
759
760 if (IsConfCanFlood(conf))
761 {
762 SetCanFlood(source_p);
763 sendto_one_notice(source_p, &me, ":*** You are exempt from flood "
764 "protection, aren't you fearsome.");
765 }
766 }
767
768 /* set_user_mode()
769 *
770 * added 15/10/91 By Darren Reed.
771 * parv[0] - sender
772 * parv[1] - username to change mode for
773 * parv[2] - modes to change
774 */
775 void
776 set_user_mode(struct Client *client_p, struct Client *source_p,
777 const int parc, char *parv[])
778 {
779 unsigned int flag, setflags;
780 char **p, *m, buf[IRCD_BUFSIZE];
781 struct Client *target_p;
782 int what = MODE_ADD, badflag = 0, i;
783
784 assert(!(parc < 2));
785
786 if ((target_p = find_person(client_p, parv[1])) == NULL)
787 {
788 if (MyConnect(source_p))
789 sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
790 return;
791 }
792
793 if (source_p != target_p)
794 {
795 sendto_one_numeric(source_p, &me, ERR_USERSDONTMATCH);
796 return;
797 }
798
799 if (parc < 3)
800 {
801 m = buf;
802 *m++ = '+';
803
804 for (i = 0; i < 128; ++i)
805 if (HasUMode(source_p, user_modes[i]))
806 *m++ = (char)i;
807 *m = '\0';
808
809 sendto_one_numeric(source_p, &me, RPL_UMODEIS, buf);
810 return;
811 }
812
813 /* find flags already set for user */
814 setflags = source_p->umodes;
815
816 /* parse mode change string(s) */
817 for (p = &parv[2]; p && *p; ++p)
818 {
819 for (m = *p; *m; ++m)
820 {
821 switch (*m)
822 {
823 case '+':
824 what = MODE_ADD;
825 break;
826 case '-':
827 what = MODE_DEL;
828 break;
829 case 'o':
830 if (what == MODE_ADD)
831 {
832 if (IsServer(client_p) && !HasUMode(source_p, UMODE_OPER))
833 {
834 ++Count.oper;
835 SetOper(source_p);
836 }
837 }
838 else
839 {
840 if (!HasUMode(source_p, UMODE_OPER))
841 break;
842
843 ClearOper(source_p);
844 Count.oper--;
845
846 if (MyConnect(source_p))
847 {
848 dlink_node *dm = NULL;
849
850 detach_conf(source_p, CONF_OPER);
851 ClrOFlag(source_p);
852 DelUMode(source_p, ConfigFileEntry.oper_only_umodes);
853
854 if ((dm = dlinkFindDelete(&oper_list, source_p)) != NULL)
855 free_dlink_node(dm);
856 }
857 }
858
859 break;
860
861 case 'S': /* Only servers may set +S in a burst */
862 case 'W': /* Only servers may set +W in a burst */
863 case 'r': /* Only services may set +r */
864 case 'x': /* Only services may set +x */
865 break;
866
867 default:
868 if ((flag = user_modes[(unsigned char)*m]))
869 {
870 if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER) &&
871 (ConfigFileEntry.oper_only_umodes & flag))
872 badflag = 1;
873 else
874 {
875 if (what == MODE_ADD)
876 AddUMode(source_p, flag);
877 else
878 DelUMode(source_p, flag);
879 }
880 }
881 else if (MyConnect(source_p))
882 badflag = 1;
883
884 break;
885 }
886 }
887 }
888
889 if (badflag)
890 sendto_one_numeric(source_p, &me, ERR_UMODEUNKNOWNFLAG);
891
892 if (MyConnect(source_p) && HasUMode(source_p, UMODE_ADMIN) &&
893 !HasOFlag(source_p, OPER_FLAG_ADMIN))
894 {
895 sendto_one_notice(source_p, &me, ":*** You have no admin flag;");
896 DelUMode(source_p, UMODE_ADMIN);
897 }
898
899 if (!(setflags & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE))
900 ++Count.invisi;
901 if ((setflags & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE))
902 --Count.invisi;
903
904 /*
905 * compare new flags with old flags and send string which
906 * will cause servers to update correctly.
907 */
908 send_umode_out(client_p, source_p, setflags);
909 }
910
911 /* send_umode()
912 * send the MODE string for user (user) to connection client_p
913 * -avalon
914 *
915 * inputs - client_p
916 * - source_p
917 * - int old
918 * - sendmask mask of modes to send
919 * - suplied umode_buf
920 * output - NONE
921 */
922 void
923 send_umode(struct Client *client_p, struct Client *source_p,
924 unsigned int old, unsigned int sendmask, char *umode_buf)
925 {
926 char *m = umode_buf;
927 int what = 0;
928 unsigned int i;
929 unsigned int flag;
930
931 /*
932 * build a string in umode_buf to represent the change in the user's
933 * mode between the new (source_p->umodes) and 'old'.
934 */
935 for (i = 0; i < 128; ++i)
936 {
937 flag = user_modes[i];
938 if (!flag)
939 continue;
940
941 if (MyClient(source_p) && !(flag & sendmask))
942 continue;
943
944 if ((flag & old) && !HasUMode(source_p, flag))
945 {
946 if (what == MODE_DEL)
947 *m++ = (char)i;
948 else
949 {
950 what = MODE_DEL;
951 *m++ = '-';
952 *m++ = (char)i;
953 }
954 }
955 else if (!(flag & old) && HasUMode(source_p, flag))
956 {
957 if (what == MODE_ADD)
958 *m++ = (char)i;
959 else
960 {
961 what = MODE_ADD;
962 *m++ = '+';
963 *m++ = (char)i;
964 }
965 }
966 }
967
968 *m = '\0';
969
970 if (*umode_buf && client_p)
971 sendto_one(client_p, ":%s!%s@%s MODE %s :%s",
972 source_p->name, source_p->username,
973 source_p->host, source_p->name, umode_buf);
974 }
975
976 /* send_umode_out()
977 *
978 * inputs -
979 * output - NONE
980 * side effects - Only send ubuf out to servers that know about this client
981 */
982 void
983 send_umode_out(struct Client *client_p, struct Client *source_p,
984 unsigned int old)
985 {
986 char buf[IRCD_BUFSIZE] = { '\0' };
987 dlink_node *ptr = NULL;
988
989 send_umode(NULL, source_p, old, SEND_UMODES, buf);
990
991 if (buf[0])
992 {
993 DLINK_FOREACH(ptr, serv_list.head)
994 {
995 struct Client *target_p = ptr->data;
996
997 if ((target_p != client_p) && (target_p != source_p))
998 sendto_one(target_p, ":%s MODE %s :%s",
999 ID_or_name(source_p, target_p),
1000 ID_or_name(source_p, target_p), buf);
1001 }
1002 }
1003
1004 if (client_p && MyClient(client_p))
1005 send_umode(client_p, source_p, old, 0xffffffff, buf);
1006 }
1007
1008 void
1009 user_set_hostmask(struct Client *target_p, const char *hostname, const int what)
1010 {
1011 dlink_node *ptr = NULL;
1012
1013 if (!strcmp(target_p->host, hostname))
1014 return;
1015
1016 switch (what)
1017 {
1018 case MODE_ADD:
1019 AddUMode(target_p, UMODE_HIDDENHOST);
1020 AddFlag(target_p, FLAGS_IP_SPOOFING);
1021 break;
1022 case MODE_DEL:
1023 DelUMode(target_p, UMODE_HIDDENHOST);
1024
1025 if (!HasFlag(target_p, FLAGS_AUTH_SPOOF))
1026 DelFlag(target_p, FLAGS_IP_SPOOFING);
1027 break;
1028 default: return;
1029 }
1030
1031 if (ConfigFileEntry.cycle_on_host_change)
1032 sendto_common_channels_local(target_p, 0, 0, ":%s!%s@%s QUIT :Changing hostname",
1033 target_p->name, target_p->username, target_p->host);
1034
1035 if (IsUserHostIp(target_p))
1036 delete_user_host(target_p->username, target_p->host, !MyConnect(target_p));
1037
1038 strlcpy(target_p->host, hostname, sizeof(target_p->host));
1039
1040 add_user_host(target_p->username, target_p->host, !MyConnect(target_p));
1041 SetUserHost(target_p);
1042
1043 if (MyClient(target_p))
1044 {
1045 sendto_one_numeric(target_p, &me, RPL_NEWHOSTIS, target_p->host);
1046 clear_ban_cache_client(target_p);
1047 }
1048
1049 if (!ConfigFileEntry.cycle_on_host_change)
1050 return;
1051
1052 DLINK_FOREACH(ptr, target_p->channel.head)
1053 {
1054 char modebuf[4], nickbuf[NICKLEN * 3 + 3] = { '\0' };
1055 char *p = modebuf;
1056 int len = 0;
1057 const struct Membership *ms = ptr->data;
1058
1059 if (has_member_flags(ms, CHFL_CHANOP))
1060 {
1061 *p++ = 'o';
1062 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
1063 }
1064
1065 if (has_member_flags(ms, CHFL_HALFOP))
1066 {
1067 *p++ = 'h';
1068 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
1069 }
1070
1071 if (has_member_flags(ms, CHFL_VOICE))
1072 {
1073 *p++ = 'v';
1074 len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name);
1075 }
1076
1077 *p = '\0';
1078
1079 sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s!%s@%s JOIN :%s",
1080 target_p->name, target_p->username, target_p->host,
1081 ms->chptr->chname);
1082 if (nickbuf[0])
1083 sendto_channel_local_butone(target_p, 0, 0, ms->chptr, ":%s MODE %s +%s %s",
1084 target_p->servptr->name, ms->chptr->chname,
1085 modebuf, nickbuf);
1086
1087 }
1088
1089 if (target_p->away[0])
1090 sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY,
1091 ":%s!%s@%s AWAY :%s",
1092 target_p->name, target_p->username,
1093 target_p->host, target_p->away);
1094 }
1095
1096 /* user_welcome()
1097 *
1098 * inputs - client pointer to client to welcome
1099 * output - NONE
1100 * side effects -
1101 */
1102 static void
1103 user_welcome(struct Client *source_p)
1104 {
1105 #if defined(__TIME__) && defined(__DATE__)
1106 static const char built_date[] = __DATE__ " at " __TIME__;
1107 #else
1108 static const char built_date[] = "unknown";
1109 #endif
1110
1111 #ifdef HAVE_LIBCRYPTO
1112 if (HasFlag(source_p, FLAGS_SSL))
1113 {
1114 AddUMode(source_p, UMODE_SSL);
1115 sendto_one_notice(source_p, &me, ":*** Connected securely via %s",
1116 ssl_get_cipher(source_p->localClient->fd.ssl));
1117 }
1118 #endif
1119
1120 sendto_one_numeric(source_p, &me, RPL_WELCOME, ServerInfo.network_name,
1121 source_p->name);
1122 sendto_one_numeric(source_p, &me, RPL_YOURHOST,
1123 get_listener_name(source_p->localClient->listener), ircd_version);
1124 sendto_one_numeric(source_p, &me, RPL_CREATED, built_date);
1125 sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer);
1126 show_isupport(source_p);
1127
1128 if (source_p->id[0] != '\0')
1129 sendto_one_numeric(source_p, &me, RPL_YOURID, source_p->id);
1130
1131 show_lusers(source_p);
1132 motd_signon(source_p);
1133 }
1134
1135 /* check_xline()
1136 *
1137 * inputs - pointer to client to test
1138 * outupt - 1 if exiting 0 if ok
1139 * side effects -
1140 */
1141 static int
1142 check_xline(struct Client *source_p)
1143 {
1144 struct MaskItem *conf = NULL;
1145 const char *reason = NULL;
1146
1147 if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0)))
1148 {
1149 ++conf->count;
1150
1151 if (conf->reason != NULL)
1152 reason = conf->reason;
1153 else
1154 reason = "No Reason";
1155
1156 sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE,
1157 "X-line Rejecting [%s] [%s], user %s [%s]",
1158 source_p->info, reason,
1159 get_client_name(source_p, HIDE_IP),
1160 source_p->sockhost);
1161
1162 ++ServerStats.is_ref;
1163 exit_client(source_p, &me, "Bad user info");
1164 return 1;
1165 }
1166
1167 return 0;
1168 }
1169
1170 /* oper_up()
1171 *
1172 * inputs - pointer to given client to oper
1173 * output - NONE
1174 * side effects - Blindly opers up given source_p, using conf info
1175 * all checks on passwords have already been done.
1176 * This could also be used by rsa oper routines.
1177 */
1178 void
1179 oper_up(struct Client *source_p)
1180 {
1181 const unsigned int old = source_p->umodes;
1182 const struct MaskItem *conf = source_p->localClient->confs.head->data;
1183
1184 assert(source_p->localClient->confs.head);
1185
1186 ++Count.oper;
1187 SetOper(source_p);
1188
1189 if (conf->modes)
1190 AddUMode(source_p, conf->modes);
1191 else if (ConfigFileEntry.oper_umodes)
1192 AddUMode(source_p, ConfigFileEntry.oper_umodes);
1193
1194 if (!(old & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE))
1195 ++Count.invisi;
1196 if ((old & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE))
1197 --Count.invisi;
1198
1199 assert(dlinkFind(&oper_list, source_p) == NULL);
1200 dlinkAdd(source_p, make_dlink_node(), &oper_list);
1201
1202 AddOFlag(source_p, conf->port);
1203
1204 if (HasOFlag(source_p, OPER_FLAG_ADMIN))
1205 AddUMode(source_p, UMODE_ADMIN);
1206
1207 sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, "%s is now an operator",
1208 get_oper_name(source_p));
1209 send_umode_out(source_p, source_p, old);
1210 sendto_one_numeric(source_p, &me, RPL_YOUREOPER);
1211 }
1212
1213 static char new_uid[TOTALSIDUID + 1]; /* allow for \0 */
1214
1215 int
1216 valid_sid(const char *sid)
1217 {
1218 if (strlen(sid) == IRC_MAXSID)
1219 if (IsDigit(*sid))
1220 if (IsAlNum(*(sid + 1)) && IsAlNum(*(sid + 2)))
1221 return 1;
1222
1223 return 0;
1224 }
1225
1226 /*
1227 * init_uid()
1228 *
1229 * inputs - NONE
1230 * output - NONE
1231 * side effects - new_uid is filled in with server id portion (sid)
1232 * (first 3 bytes) or defaulted to 'A'.
1233 * Rest is filled in with 'A'
1234 */
1235 void
1236 init_uid(void)
1237 {
1238 unsigned int i;
1239
1240 memset(new_uid, 0, sizeof(new_uid));
1241
1242 if (!EmptyString(ServerInfo.sid))
1243 strlcpy(new_uid, ServerInfo.sid, sizeof(new_uid));
1244
1245 for (i = 0; i < IRC_MAXSID; ++i)
1246 if (new_uid[i] == '\0')
1247 new_uid[i] = 'A';
1248
1249 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1250 memcpy(new_uid + IRC_MAXSID, "AAAAA@", IRC_MAXUID);
1251 }
1252
1253 /*
1254 * add_one_to_uid
1255 *
1256 * inputs - index number into new_uid
1257 * output - NONE
1258 * side effects - new_uid is incremented by one
1259 * note this is a recursive function
1260 */
1261 static void
1262 add_one_to_uid(int i)
1263 {
1264 if (i != IRC_MAXSID) /* Not reached server SID portion yet? */
1265 {
1266 if (new_uid[i] == 'Z')
1267 new_uid[i] = '0';
1268 else if (new_uid[i] == '9')
1269 {
1270 new_uid[i] = 'A';
1271 add_one_to_uid(i-1);
1272 }
1273 else
1274 ++new_uid[i];
1275 }
1276 else
1277 {
1278 /* NOTE: if IRC_MAXUID != 6, this will have to be rewritten */
1279 if (new_uid[i] == 'Z')
1280 memcpy(new_uid + IRC_MAXSID, "AAAAAA", IRC_MAXUID);
1281 else
1282 ++new_uid[i];
1283 }
1284 }
1285
1286 /*
1287 * uid_get
1288 *
1289 * inputs - struct Client *
1290 * output - new UID is returned to caller
1291 * side effects - new_uid is incremented by one.
1292 */
1293 static const char *
1294 uid_get(void)
1295 {
1296 add_one_to_uid(TOTALSIDUID - 1); /* index from 0 */
1297 return new_uid;
1298 }
1299
1300 /*
1301 * init_isupport()
1302 *
1303 * input - NONE
1304 * output - NONE
1305 * side effects - Must be called before isupport is enabled
1306 */
1307 void
1308 init_isupport(void)
1309 {
1310 add_isupport("CALLERID", NULL, -1);
1311 add_isupport("CASEMAPPING", CASEMAP, -1);
1312 add_isupport("DEAF", "D", -1);
1313 add_isupport("KICKLEN", NULL, KICKLEN);
1314 add_isupport("MODES", NULL, MAXMODEPARAMS);
1315 #ifdef HALFOPS
1316 add_isupport("PREFIX", "(ohv)@%+", -1);
1317 add_isupport("STATUSMSG", "@%+", -1);
1318 #else
1319 add_isupport("PREFIX", "(ov)@+", -1);
1320 add_isupport("STATUSMSG", "@+", -1);
1321 #endif
1322 add_isupport("EXCEPTS", "e", -1);
1323 add_isupport("INVEX", "I", -1);
1324 }
1325
1326 /*
1327 * add_isupport()
1328 *
1329 * input - name of supported function
1330 * - options if any
1331 * - number if any
1332 * output - NONE
1333 * side effects - Each supported item must call this when activated
1334 */
1335 void
1336 add_isupport(const char *name, const char *options, int n)
1337 {
1338 dlink_node *ptr;
1339 struct Isupport *support;
1340
1341 DLINK_FOREACH(ptr, support_list.head)
1342 {
1343 support = ptr->data;
1344 if (irccmp(support->name, name) == 0)
1345 {
1346 MyFree(support->name);
1347 MyFree(support->options);
1348 break;
1349 }
1350 }
1351
1352 if (ptr == NULL)
1353 {
1354 support = MyMalloc(sizeof(*support));
1355 dlinkAddTail(support, &support->node, &support_list);
1356 }
1357
1358 support->name = xstrdup(name);
1359 if (options != NULL)
1360 support->options = xstrdup(options);
1361 support->number = n;
1362
1363 rebuild_isupport_message_line();
1364 }
1365
1366 /*
1367 * delete_isupport()
1368 *
1369 * input - name of supported function
1370 * output - NONE
1371 * side effects - Each supported item must call this when deactivated
1372 */
1373 void
1374 delete_isupport(const char *name)
1375 {
1376 dlink_node *ptr;
1377 struct Isupport *support;
1378
1379 DLINK_FOREACH(ptr, support_list.head)
1380 {
1381 support = ptr->data;
1382 if (irccmp(support->name, name) == 0)
1383 {
1384 dlinkDelete(ptr, &support_list);
1385 MyFree(support->name);
1386 MyFree(support->options);
1387 MyFree(support);
1388 break;
1389 }
1390 }
1391
1392 rebuild_isupport_message_line();
1393 }
1394
1395 /*
1396 * rebuild_isupport_message_line
1397 *
1398 * input - NONE
1399 * output - NONE
1400 * side effects - Destroy the isupport MessageFile lines, and rebuild.
1401 */
1402 void
1403 rebuild_isupport_message_line(void)
1404 {
1405 char isupportbuffer[IRCD_BUFSIZE];
1406 char *p = isupportbuffer;
1407 dlink_node *ptr = NULL, *ptr_next = NULL;
1408 int n = 0;
1409 int tokens = 0;
1410 size_t len = 0;
1411 size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));
1412
1413 DLINK_FOREACH_SAFE(ptr, ptr_next, support_list_lines.head)
1414 {
1415 dlinkDelete(ptr, &support_list_lines);
1416 MyFree(ptr->data);
1417 free_dlink_node(ptr);
1418 }
1419
1420 DLINK_FOREACH(ptr, support_list.head)
1421 {
1422 struct Isupport *support = ptr->data;
1423
1424 p += (n = sprintf(p, "%s", support->name));
1425 len += n;
1426
1427 if (support->options != NULL)
1428 {
1429 p += (n = sprintf(p, "=%s", support->options));
1430 len += n;
1431 }
1432
1433 if (support->number > 0)
1434 {
1435 p += (n = sprintf(p, "=%d", support->number));
1436 len += n;
1437 }
1438
1439 *p++ = ' ';
1440 len++;
1441 *p = '\0';
1442
1443 if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
1444 { /* arbritrary for now */
1445 if (*--p == ' ')
1446 *p = '\0';
1447
1448 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1449 p = isupportbuffer;
1450 len = 0;
1451 n = tokens = 0;
1452 }
1453 }
1454
1455 if (len != 0)
1456 {
1457 if (*--p == ' ')
1458 *p = '\0';
1459 dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &support_list_lines);
1460 }
1461 }

Properties

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