1 |
/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
4 |
* Copyright (c) 1997-2016 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 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 "id.h" |
35 |
#include "irc_string.h" |
36 |
#include "ircd.h" |
37 |
#include "listener.h" |
38 |
#include "motd.h" |
39 |
#include "numeric.h" |
40 |
#include "conf.h" |
41 |
#include "log.h" |
42 |
#include "server.h" |
43 |
#include "send.h" |
44 |
#include "memory.h" |
45 |
#include "packet.h" |
46 |
#include "rng_mt.h" |
47 |
#include "userhost.h" |
48 |
#include "misc.h" |
49 |
#include "parse.h" |
50 |
#include "watch.h" |
51 |
#include "isupport.h" |
52 |
#include "tls.h" |
53 |
|
54 |
static char umode_buffer[IRCD_BUFSIZE]; |
55 |
|
56 |
const struct user_modes *umode_map[256]; |
57 |
const struct user_modes umode_tab[] = |
58 |
{ |
59 |
{ 'D', UMODE_DEAF }, |
60 |
{ 'F', UMODE_FARCONNECT }, |
61 |
{ 'G', UMODE_SOFTCALLERID }, |
62 |
{ 'H', UMODE_HIDDEN }, |
63 |
{ 'R', UMODE_REGONLY }, |
64 |
{ 'S', UMODE_SSL }, |
65 |
{ 'W', UMODE_WEBIRC }, |
66 |
{ 'a', UMODE_ADMIN }, |
67 |
{ 'b', UMODE_BOTS }, |
68 |
{ 'c', UMODE_CCONN }, |
69 |
{ 'd', UMODE_DEBUG }, |
70 |
{ 'e', UMODE_EXTERNAL }, |
71 |
{ 'f', UMODE_FULL }, |
72 |
{ 'g', UMODE_CALLERID }, |
73 |
{ 'i', UMODE_INVISIBLE }, |
74 |
{ 'j', UMODE_REJ }, |
75 |
{ 'k', UMODE_SKILL }, |
76 |
{ 'l', UMODE_LOCOPS }, |
77 |
{ 'n', UMODE_NCHANGE }, |
78 |
{ 'o', UMODE_OPER }, |
79 |
{ 'p', UMODE_HIDECHANS }, |
80 |
{ 'q', UMODE_HIDEIDLE }, |
81 |
{ 'r', UMODE_REGISTERED }, |
82 |
{ 's', UMODE_SERVNOTICE }, |
83 |
{ 'u', UMODE_UNAUTH }, |
84 |
{ 'w', UMODE_WALLOP }, |
85 |
{ 'x', UMODE_HIDDENHOST }, |
86 |
{ 'y', UMODE_SPY }, |
87 |
{ '\0', 0 } |
88 |
}; |
89 |
|
90 |
void |
91 |
user_modes_init(void) |
92 |
{ |
93 |
char *umode_buffer_ptr = umode_buffer; |
94 |
|
95 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
96 |
{ |
97 |
umode_map[tab->c] = tab; |
98 |
*umode_buffer_ptr++ = tab->c; |
99 |
} |
100 |
|
101 |
*umode_buffer_ptr = '\0'; |
102 |
} |
103 |
|
104 |
/* show_lusers() |
105 |
* |
106 |
* inputs - pointer to client |
107 |
* output - NONE |
108 |
* side effects - display to client user counts etc. |
109 |
*/ |
110 |
void |
111 |
show_lusers(struct Client *source_p) |
112 |
{ |
113 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
114 |
sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
115 |
Count.invisi, dlink_list_length(&global_server_list)); |
116 |
else |
117 |
sendto_one_numeric(source_p, &me, RPL_LUSERCLIENT, (Count.total - Count.invisi), |
118 |
Count.invisi, 1); |
119 |
|
120 |
if (Count.oper) |
121 |
sendto_one_numeric(source_p, &me, RPL_LUSEROP, Count.oper); |
122 |
|
123 |
if (dlink_list_length(&unknown_list)) |
124 |
sendto_one_numeric(source_p, &me, RPL_LUSERUNKNOWN, dlink_list_length(&unknown_list)); |
125 |
|
126 |
if (dlink_list_length(&channel_list)) |
127 |
sendto_one_numeric(source_p, &me, RPL_LUSERCHANNELS, dlink_list_length(&channel_list)); |
128 |
|
129 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
130 |
{ |
131 |
sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.local, Count.myserver); |
132 |
sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.local, Count.max_loc); |
133 |
} |
134 |
else |
135 |
{ |
136 |
sendto_one_numeric(source_p, &me, RPL_LUSERME, Count.total, 0); |
137 |
sendto_one_numeric(source_p, &me, RPL_LOCALUSERS, Count.total, Count.max_tot); |
138 |
} |
139 |
|
140 |
sendto_one_numeric(source_p, &me, RPL_GLOBALUSERS, Count.total, Count.max_tot); |
141 |
|
142 |
if (!ConfigServerHide.hide_servers || HasUMode(source_p, UMODE_OPER)) |
143 |
sendto_one_numeric(source_p, &me, RPL_STATSCONN, Count.max_loc_con, |
144 |
Count.max_loc_cli, Count.totalrestartcount); |
145 |
|
146 |
if (Count.local > Count.max_loc_cli) |
147 |
Count.max_loc_cli = Count.local; |
148 |
|
149 |
if ((Count.local + Count.myserver) > Count.max_loc_con) |
150 |
Count.max_loc_con = Count.local + Count.myserver; |
151 |
} |
152 |
|
153 |
/* report_and_set_user_flags() |
154 |
* |
155 |
* inputs - pointer to source_p |
156 |
* - pointer to conf for this user |
157 |
* output - NONE |
158 |
* side effects - Report to user any special flags |
159 |
* they are getting, and set them. |
160 |
*/ |
161 |
static void |
162 |
report_and_set_user_flags(struct Client *source_p, const struct MaskItem *conf) |
163 |
{ |
164 |
/* If this user is being spoofed, tell them so */ |
165 |
if (IsConfDoSpoofIp(conf)) |
166 |
sendto_one_notice(source_p, &me, ":*** Spoofing your IP"); |
167 |
|
168 |
/* If this user is in the exception class, set it "E lined" */ |
169 |
if (IsConfExemptKline(conf)) |
170 |
{ |
171 |
AddFlag(source_p, FLAGS_EXEMPTKLINE); |
172 |
sendto_one_notice(source_p, &me, ":*** You are exempt from K/D lines"); |
173 |
} |
174 |
|
175 |
if (IsConfExemptXline(conf)) |
176 |
{ |
177 |
AddFlag(source_p, FLAGS_EXEMPTXLINE); |
178 |
sendto_one_notice(source_p, &me, ":*** You are exempt from X lines"); |
179 |
} |
180 |
|
181 |
if (IsConfExemptResv(conf)) |
182 |
{ |
183 |
AddFlag(source_p, FLAGS_EXEMPTRESV); |
184 |
sendto_one_notice(source_p, &me, ":*** You are exempt from resvs"); |
185 |
} |
186 |
|
187 |
/* If this user is exempt from user limits set it "F lined" */ |
188 |
if (IsConfExemptLimits(conf)) |
189 |
{ |
190 |
AddFlag(source_p, FLAGS_NOLIMIT); |
191 |
sendto_one_notice(source_p, &me, ":*** You are exempt from user limits"); |
192 |
} |
193 |
|
194 |
if (IsConfCanFlood(conf)) |
195 |
{ |
196 |
AddFlag(source_p, FLAGS_CANFLOOD); |
197 |
sendto_one_notice(source_p, &me, ":*** You are exempt from flood protection"); |
198 |
} |
199 |
} |
200 |
|
201 |
/* introduce_client() |
202 |
* |
203 |
* inputs - source_p |
204 |
* output - NONE |
205 |
* side effects - This common function introduces a client to the rest |
206 |
* of the net, either from a local client connect or |
207 |
* from a remote connect. |
208 |
*/ |
209 |
static void |
210 |
introduce_client(struct Client *source_p) |
211 |
{ |
212 |
dlink_node *node = NULL; |
213 |
char ubuf[IRCD_BUFSIZE] = ""; |
214 |
|
215 |
if (MyConnect(source_p)) |
216 |
send_umode(source_p, source_p, 0, ubuf); |
217 |
else |
218 |
send_umode(NULL, source_p, 0, ubuf); |
219 |
|
220 |
watch_check_hash(source_p, RPL_LOGON); |
221 |
|
222 |
if (ubuf[0] == '\0') |
223 |
{ |
224 |
ubuf[0] = '+'; |
225 |
ubuf[1] = '\0'; |
226 |
} |
227 |
|
228 |
DLINK_FOREACH(node, local_server_list.head) |
229 |
{ |
230 |
struct Client *server = node->data; |
231 |
|
232 |
if (server == source_p->from) |
233 |
continue; |
234 |
|
235 |
sendto_one(server, ":%s UID %s %u %ju %s %s %s %s %s %s :%s", |
236 |
source_p->servptr->id, |
237 |
source_p->name, source_p->hopcount+1, |
238 |
source_p->tsinfo, |
239 |
ubuf, source_p->username, source_p->host, |
240 |
source_p->sockhost, source_p->id, |
241 |
source_p->account, |
242 |
source_p->info); |
243 |
|
244 |
if (!EmptyString(source_p->certfp)) |
245 |
sendto_one(server, ":%s CERTFP %s", source_p->id, source_p->certfp); |
246 |
} |
247 |
} |
248 |
|
249 |
/* user_welcome() |
250 |
* |
251 |
* inputs - client pointer to client to welcome |
252 |
* output - NONE |
253 |
* side effects - |
254 |
*/ |
255 |
static void |
256 |
user_welcome(struct Client *source_p) |
257 |
{ |
258 |
static const char built_date[] = __DATE__ " at " __TIME__; |
259 |
|
260 |
if (HasFlag(source_p, FLAGS_SSL)) |
261 |
{ |
262 |
AddUMode(source_p, UMODE_SSL); |
263 |
sendto_one_notice(source_p, &me, ":*** Connected securely via %s", |
264 |
tls_get_cipher(&source_p->connection->fd.ssl)); |
265 |
} |
266 |
|
267 |
sendto_one_numeric(source_p, &me, RPL_WELCOME, ConfigServerInfo.network_name, |
268 |
source_p->name); |
269 |
sendto_one_numeric(source_p, &me, RPL_YOURHOST, |
270 |
listener_get_name(source_p->connection->listener), ircd_version); |
271 |
sendto_one_numeric(source_p, &me, RPL_CREATED, built_date); |
272 |
sendto_one_numeric(source_p, &me, RPL_MYINFO, me.name, ircd_version, umode_buffer); |
273 |
|
274 |
isupport_show(source_p); |
275 |
show_lusers(source_p); |
276 |
motd_signon(source_p); |
277 |
} |
278 |
|
279 |
/* check_xline() |
280 |
* |
281 |
* inputs - pointer to client to test |
282 |
* outupt - 1 if exiting 0 if ok |
283 |
* side effects - |
284 |
*/ |
285 |
static int |
286 |
check_xline(struct Client *source_p) |
287 |
{ |
288 |
struct MaskItem *conf = NULL; |
289 |
|
290 |
if (HasFlag(source_p, FLAGS_EXEMPTXLINE)) |
291 |
return 0; |
292 |
|
293 |
if ((conf = find_matching_name_conf(CONF_XLINE, source_p->info, NULL, NULL, 0))) |
294 |
{ |
295 |
++conf->count; |
296 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
297 |
"X-line Rejecting [%s] [%s], user %s [%s]", |
298 |
source_p->info, conf->reason, |
299 |
get_client_name(source_p, HIDE_IP), |
300 |
source_p->sockhost); |
301 |
|
302 |
++ServerStats.is_ref; |
303 |
exit_client(source_p, "Bad user info"); |
304 |
return 1; |
305 |
} |
306 |
|
307 |
return 0; |
308 |
} |
309 |
|
310 |
/*! \brief This function is called when both NICK and USER messages |
311 |
* have been accepted for the client, in whatever order. Only |
312 |
* after this, is the UID message propagated. |
313 |
* \param source_p Pointer to given client to introduce |
314 |
*/ |
315 |
void |
316 |
register_local_user(struct Client *source_p) |
317 |
{ |
318 |
const char *id = NULL; |
319 |
const struct MaskItem *conf = NULL; |
320 |
|
321 |
assert(source_p == source_p->from); |
322 |
assert(MyConnect(source_p)); |
323 |
assert(IsUnknown(source_p)); |
324 |
assert(!source_p->connection->registration); |
325 |
|
326 |
if (ConfigGeneral.ping_cookie) |
327 |
{ |
328 |
if (!HasFlag(source_p, FLAGS_PINGSENT) && !source_p->connection->random_ping) |
329 |
{ |
330 |
do |
331 |
source_p->connection->random_ping = genrand_int32(); |
332 |
while (!source_p->connection->random_ping); |
333 |
|
334 |
sendto_one(source_p, "PING :%u", source_p->connection->random_ping); |
335 |
AddFlag(source_p, FLAGS_PINGSENT); |
336 |
return; |
337 |
} |
338 |
|
339 |
if (!HasFlag(source_p, FLAGS_PING_COOKIE)) |
340 |
return; |
341 |
} |
342 |
|
343 |
source_p->connection->last_privmsg = CurrentTime; |
344 |
/* Straight up the maximum rate of flooding... */ |
345 |
source_p->connection->allow_read = MAX_FLOOD_BURST; |
346 |
|
347 |
if (!check_client(source_p)) |
348 |
return; |
349 |
|
350 |
if (!valid_hostname(source_p->host)) |
351 |
{ |
352 |
sendto_one_notice(source_p, &me, ":*** Notice -- You have an illegal " |
353 |
"character in your hostname"); |
354 |
strlcpy(source_p->host, source_p->sockhost, sizeof(source_p->host)); |
355 |
} |
356 |
|
357 |
conf = source_p->connection->confs.head->data; |
358 |
|
359 |
if (!HasFlag(source_p, FLAGS_GOTID)) |
360 |
{ |
361 |
char username[USERLEN + 1] = ""; |
362 |
unsigned int i = 0; |
363 |
|
364 |
if (IsNeedIdentd(conf)) |
365 |
{ |
366 |
++ServerStats.is_ref; |
367 |
sendto_one_notice(source_p, &me, ":*** Notice -- You need to install " |
368 |
"identd to use this server"); |
369 |
exit_client(source_p, "Install identd"); |
370 |
return; |
371 |
} |
372 |
|
373 |
strlcpy(username, source_p->username, sizeof(username)); |
374 |
|
375 |
if (!IsNoTilde(conf)) |
376 |
source_p->username[i++] = '~'; |
377 |
|
378 |
for (const char *p = username; *p && i < USERLEN; ++p) |
379 |
source_p->username[i++] = *p; |
380 |
|
381 |
source_p->username[i] = '\0'; |
382 |
} |
383 |
|
384 |
/* Password check */ |
385 |
if (!EmptyString(conf->passwd)) |
386 |
{ |
387 |
if (!match_conf_password(source_p->connection->password, conf)) |
388 |
{ |
389 |
++ServerStats.is_ref; |
390 |
|
391 |
sendto_one_numeric(source_p, &me, ERR_PASSWDMISMATCH); |
392 |
exit_client(source_p, "Bad Password"); |
393 |
return; |
394 |
} |
395 |
} |
396 |
|
397 |
/* |
398 |
* Don't free source_p->connection->password here - it can be required |
399 |
* by masked /stats I if there are auth {} blocks with need_password = no; |
400 |
* --adx |
401 |
*/ |
402 |
|
403 |
/* |
404 |
* Report if user has &^>= etc. and set flags as needed in source_p |
405 |
*/ |
406 |
report_and_set_user_flags(source_p, conf); |
407 |
|
408 |
if (IsDead(source_p)) |
409 |
return; |
410 |
|
411 |
/* |
412 |
* Limit clients - |
413 |
* We want to be able to have servers and F-line clients |
414 |
* connect, so save room for "buffer" connections. |
415 |
* Smaller servers may want to decrease this, and it should |
416 |
* probably be just a percentage of the MAXCLIENTS... |
417 |
* -Taner |
418 |
*/ |
419 |
if ((Count.local >= GlobalSetOptions.maxclients + MAX_BUFFER) || |
420 |
(Count.local >= GlobalSetOptions.maxclients && !HasFlag(source_p, FLAGS_NOLIMIT))) |
421 |
{ |
422 |
sendto_realops_flags(UMODE_FULL, L_ALL, SEND_NOTICE, |
423 |
"Too many clients, rejecting %s[%s].", |
424 |
source_p->name, source_p->host); |
425 |
++ServerStats.is_ref; |
426 |
exit_client(source_p, "Sorry, server is full - try later"); |
427 |
return; |
428 |
} |
429 |
|
430 |
if (!valid_username(source_p->username, 1)) |
431 |
{ |
432 |
char buf[IRCD_BUFSIZE] = ""; |
433 |
|
434 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
435 |
"Invalid username: %s (%s@%s)", |
436 |
source_p->name, source_p->username, source_p->host); |
437 |
++ServerStats.is_ref; |
438 |
snprintf(buf, sizeof(buf), "Invalid username [%s]", source_p->username); |
439 |
exit_client(source_p, buf); |
440 |
return; |
441 |
} |
442 |
|
443 |
if (check_xline(source_p)) |
444 |
return; |
445 |
|
446 |
while (hash_find_id((id = uid_get()))) |
447 |
; |
448 |
|
449 |
strlcpy(source_p->id, id, sizeof(source_p->id)); |
450 |
hash_add_id(source_p); |
451 |
|
452 |
sendto_realops_flags(UMODE_CCONN, L_ALL, SEND_NOTICE, |
453 |
"Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s>", |
454 |
source_p->name, source_p->username, source_p->host, |
455 |
source_p->sockhost, |
456 |
get_client_class(&source_p->connection->confs), |
457 |
source_p->info, source_p->id); |
458 |
|
459 |
if (ConfigGeneral.invisible_on_connect) |
460 |
{ |
461 |
AddUMode(source_p, UMODE_INVISIBLE); |
462 |
++Count.invisi; |
463 |
} |
464 |
|
465 |
if (++Count.local > Count.max_loc) |
466 |
{ |
467 |
Count.max_loc = Count.local; |
468 |
|
469 |
if (!(Count.max_loc % 10)) |
470 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
471 |
"New maximum local client connections: %u", |
472 |
Count.max_loc); |
473 |
} |
474 |
|
475 |
if (++Count.total > Count.max_tot) |
476 |
Count.max_tot = Count.total; |
477 |
++Count.totalrestartcount; |
478 |
|
479 |
assert(source_p->servptr == &me); |
480 |
SetClient(source_p); |
481 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
482 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
483 |
|
484 |
assert(dlinkFind(&unknown_list, source_p)); |
485 |
|
486 |
dlink_move_node(&source_p->connection->lclient_node, |
487 |
&unknown_list, &local_client_list); |
488 |
|
489 |
user_welcome(source_p); |
490 |
userhost_add(source_p->username, source_p->host, 0); |
491 |
AddFlag(source_p, FLAGS_USERHOST); |
492 |
|
493 |
introduce_client(source_p); |
494 |
} |
495 |
|
496 |
/* register_remote_user() |
497 |
* |
498 |
* inputs - source_p remote or directly connected client |
499 |
* - username to register as |
500 |
* - host name to register as |
501 |
* - server name |
502 |
* output - NONE |
503 |
* side effects - This function is called when a remote client |
504 |
* is introduced by a server. |
505 |
*/ |
506 |
void |
507 |
register_remote_user(struct Client *source_p) |
508 |
{ |
509 |
const struct Client *target_p = NULL; |
510 |
|
511 |
if ((target_p = source_p->servptr) && target_p->from != source_p->from) |
512 |
{ |
513 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
514 |
"Bad User [%s] :%s USER %s@%s %s, != %s[%s]", |
515 |
source_p->from->name, source_p->name, source_p->username, |
516 |
source_p->host, source_p->servptr->name, |
517 |
target_p->name, target_p->from->name); |
518 |
sendto_one(source_p->from, |
519 |
":%s KILL %s :%s (UID from wrong direction (%s != %s))", |
520 |
me.id, source_p->id, me.name, source_p->servptr->name, |
521 |
target_p->from->name); |
522 |
|
523 |
AddFlag(source_p, FLAGS_KILLED); |
524 |
exit_client(source_p, "UID server wrong direction"); |
525 |
return; |
526 |
} |
527 |
|
528 |
/* |
529 |
* If the nick has been introduced by a services server, |
530 |
* make it a service as well. |
531 |
*/ |
532 |
if (HasFlag(source_p->servptr, FLAGS_SERVICE)) |
533 |
AddFlag(source_p, FLAGS_SERVICE); |
534 |
|
535 |
if (++Count.total > Count.max_tot) |
536 |
Count.max_tot = Count.total; |
537 |
|
538 |
SetClient(source_p); |
539 |
dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->client_list); |
540 |
dlinkAdd(source_p, &source_p->node, &global_client_list); |
541 |
userhost_add(source_p->username, source_p->host, 1); |
542 |
AddFlag(source_p, FLAGS_USERHOST); |
543 |
|
544 |
if (HasFlag(source_p->servptr, FLAGS_EOB)) |
545 |
sendto_realops_flags(UMODE_FARCONNECT, L_ALL, SEND_NOTICE, |
546 |
"Client connecting at %s: %s (%s@%s) [%s] [%s] <%s>", |
547 |
source_p->servptr->name, |
548 |
source_p->name, source_p->username, source_p->host, |
549 |
source_p->sockhost, source_p->info, source_p->id); |
550 |
|
551 |
introduce_client(source_p); |
552 |
} |
553 |
|
554 |
/* valid_hostname() |
555 |
* |
556 |
* Inputs - pointer to hostname |
557 |
* Output - 1 if valid, 0 if not |
558 |
* Side effects - check hostname for validity |
559 |
* |
560 |
* NOTE: this doesn't allow a hostname to begin with a dot and |
561 |
* will not allow more dots than chars. |
562 |
*/ |
563 |
int |
564 |
valid_hostname(const char *hostname) |
565 |
{ |
566 |
const char *p = hostname; |
567 |
|
568 |
assert(p); |
569 |
|
570 |
if (EmptyString(p) || *p == '.' || *p == ':') |
571 |
return 0; |
572 |
|
573 |
for (; *p; ++p) |
574 |
if (!IsHostChar(*p)) |
575 |
return 0; |
576 |
|
577 |
return p - hostname <= HOSTLEN; |
578 |
} |
579 |
|
580 |
/* valid_username() |
581 |
* |
582 |
* Inputs - pointer to user |
583 |
* Output - 1 if valid, 0 if not |
584 |
* Side effects - check username for validity |
585 |
* |
586 |
* Absolutely always reject any '*' '!' '?' '@' in an user name |
587 |
* reject any odd control characters names. |
588 |
* Allow '.' in username to allow for "first.last" |
589 |
* style of username |
590 |
*/ |
591 |
int |
592 |
valid_username(const char *username, const int local) |
593 |
{ |
594 |
const char *p = username; |
595 |
|
596 |
assert(p); |
597 |
|
598 |
if (*p == '~') |
599 |
++p; |
600 |
|
601 |
/* |
602 |
* Reject usernames that don't start with an alphanum |
603 |
* i.e. reject jokers who have '-@somehost' or '.@somehost' |
604 |
* or "-hi-@somehost", "h-----@somehost" would still be accepted. |
605 |
*/ |
606 |
if (!IsAlNum(*p)) |
607 |
return 0; |
608 |
|
609 |
if (local) |
610 |
{ |
611 |
unsigned int dots = 0; |
612 |
|
613 |
while (*++p) |
614 |
{ |
615 |
if (*p == '.' && ConfigGeneral.dots_in_ident) |
616 |
{ |
617 |
if (++dots > ConfigGeneral.dots_in_ident) |
618 |
return 0; |
619 |
if (!IsUserChar(*(p + 1))) |
620 |
return 0; |
621 |
} |
622 |
else if (!IsUserChar(*p)) |
623 |
return 0; |
624 |
} |
625 |
} |
626 |
else |
627 |
{ |
628 |
while (*++p) |
629 |
if (!IsUserChar(*p)) |
630 |
return 0; |
631 |
} |
632 |
|
633 |
return p - username <= USERLEN; |
634 |
} |
635 |
|
636 |
/* clean_nick_name() |
637 |
* |
638 |
* input - nickname |
639 |
* - whether it's a local nick (1) or remote (0) |
640 |
* output - none |
641 |
* side effects - walks through the nickname, returning 0 if erroneous |
642 |
*/ |
643 |
int |
644 |
valid_nickname(const char *nickname, const int local) |
645 |
{ |
646 |
const char *p = nickname; |
647 |
|
648 |
assert(p); |
649 |
|
650 |
/* |
651 |
* Nicks can't start with a digit or - or be 0 length. |
652 |
*/ |
653 |
if (EmptyString(p) || *p == '-' || (IsDigit(*p) && local)) |
654 |
return 0; |
655 |
|
656 |
for (; *p; ++p) |
657 |
if (!IsNickChar(*p)) |
658 |
return 0; |
659 |
|
660 |
return p - nickname <= NICKLEN; |
661 |
} |
662 |
|
663 |
/* send_umode() |
664 |
* send the MODE string for user (user) to connection client_p |
665 |
* -avalon |
666 |
* |
667 |
* inputs - client_p |
668 |
* - source_p |
669 |
* - int old |
670 |
* - suplied umode_buf |
671 |
* output - NONE |
672 |
*/ |
673 |
void |
674 |
send_umode(struct Client *client_p, struct Client *source_p, |
675 |
unsigned int old, char *umode_buf) |
676 |
{ |
677 |
char *m = umode_buf; |
678 |
int what = 0; |
679 |
|
680 |
/* |
681 |
* Build a string in umode_buf to represent the change in the user's |
682 |
* mode between the new (source_p->umodes) and 'old'. |
683 |
*/ |
684 |
for (const struct user_modes *tab = umode_tab; tab->c; ++tab) |
685 |
{ |
686 |
if ((tab->flag & old) && !HasUMode(source_p, tab->flag)) |
687 |
{ |
688 |
if (what == MODE_DEL) |
689 |
*m++ = tab->c; |
690 |
else |
691 |
{ |
692 |
what = MODE_DEL; |
693 |
*m++ = '-'; |
694 |
*m++ = tab->c; |
695 |
} |
696 |
} |
697 |
else if (!(tab->flag & old) && HasUMode(source_p, tab->flag)) |
698 |
{ |
699 |
if (what == MODE_ADD) |
700 |
*m++ = tab->c; |
701 |
else |
702 |
{ |
703 |
what = MODE_ADD; |
704 |
*m++ = '+'; |
705 |
*m++ = tab->c; |
706 |
} |
707 |
} |
708 |
} |
709 |
|
710 |
*m = '\0'; |
711 |
|
712 |
if (*umode_buf && client_p) |
713 |
sendto_one(client_p, ":%s!%s@%s MODE %s :%s", |
714 |
client_p->name, client_p->username, |
715 |
client_p->host, client_p->name, umode_buf); |
716 |
} |
717 |
|
718 |
/* send_umode_out() |
719 |
* |
720 |
* inputs - |
721 |
* output - NONE |
722 |
* side effects - Only send ubuf out to servers that know about this client |
723 |
*/ |
724 |
void |
725 |
send_umode_out(struct Client *source_p, unsigned int old) |
726 |
{ |
727 |
char buf[IRCD_BUFSIZE] = ""; |
728 |
|
729 |
send_umode(MyClient(source_p) ? source_p : NULL, source_p, old, buf); |
730 |
|
731 |
if (buf[0]) |
732 |
sendto_server(source_p, 0, 0, ":%s MODE %s :%s", |
733 |
source_p->id, source_p->id, buf); |
734 |
} |
735 |
|
736 |
void |
737 |
user_set_hostmask(struct Client *target_p, const char *hostname, const int what) |
738 |
{ |
739 |
dlink_node *node = NULL; |
740 |
|
741 |
if (!strcmp(target_p->host, hostname)) |
742 |
return; |
743 |
|
744 |
switch (what) |
745 |
{ |
746 |
case MODE_ADD: |
747 |
AddUMode(target_p, UMODE_HIDDENHOST); |
748 |
break; |
749 |
case MODE_DEL: |
750 |
DelUMode(target_p, UMODE_HIDDENHOST); |
751 |
break; |
752 |
default: return; |
753 |
} |
754 |
|
755 |
if (ConfigGeneral.cycle_on_host_change) |
756 |
sendto_common_channels_local(target_p, 0, 0, CAP_CHGHOST, ":%s!%s@%s QUIT :Changing hostname", |
757 |
target_p->name, target_p->username, target_p->host); |
758 |
|
759 |
sendto_common_channels_local(target_p, 0, CAP_CHGHOST, 0, ":%s!%s@%s CHGHOST %s %s", |
760 |
target_p->name, target_p->username, |
761 |
target_p->host, target_p->username, hostname); |
762 |
|
763 |
if (HasFlag(target_p, FLAGS_USERHOST)) |
764 |
userhost_del(target_p->username, target_p->host, !MyConnect(target_p)); |
765 |
|
766 |
strlcpy(target_p->host, hostname, sizeof(target_p->host)); |
767 |
|
768 |
userhost_add(target_p->username, target_p->host, !MyConnect(target_p)); |
769 |
AddFlag(target_p, FLAGS_USERHOST); |
770 |
|
771 |
if (MyConnect(target_p)) |
772 |
{ |
773 |
sendto_one_numeric(target_p, &me, RPL_VISIBLEHOST, target_p->host); |
774 |
clear_ban_cache_client(target_p); |
775 |
} |
776 |
|
777 |
if (!ConfigGeneral.cycle_on_host_change) |
778 |
return; |
779 |
|
780 |
DLINK_FOREACH(node, target_p->channel.head) |
781 |
{ |
782 |
char modebuf[CMEMBER_STATUS_FLAGS_LEN + 1]; |
783 |
char nickbuf[CMEMBER_STATUS_FLAGS_LEN * NICKLEN + CMEMBER_STATUS_FLAGS_LEN] = ""; |
784 |
char *p = modebuf; |
785 |
int len = 0; |
786 |
const struct Membership *member = node->data; |
787 |
|
788 |
if (has_member_flags(member, CHFL_CHANOP)) |
789 |
{ |
790 |
*p++ = 'o'; |
791 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
792 |
} |
793 |
|
794 |
if (has_member_flags(member, CHFL_HALFOP)) |
795 |
{ |
796 |
*p++ = 'h'; |
797 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
798 |
} |
799 |
|
800 |
if (has_member_flags(member, CHFL_VOICE)) |
801 |
{ |
802 |
*p++ = 'v'; |
803 |
len += snprintf(nickbuf + len, sizeof(nickbuf) - len, len ? " %s" : "%s", target_p->name); |
804 |
} |
805 |
|
806 |
*p = '\0'; |
807 |
|
808 |
sendto_channel_local(target_p, member->chptr, 0, CAP_EXTENDED_JOIN, CAP_CHGHOST, ":%s!%s@%s JOIN %s %s :%s", |
809 |
target_p->name, target_p->username, |
810 |
target_p->host, member->chptr->name, |
811 |
target_p->account, target_p->info); |
812 |
sendto_channel_local(target_p, member->chptr, 0, 0, CAP_EXTENDED_JOIN | CAP_CHGHOST, ":%s!%s@%s JOIN :%s", |
813 |
target_p->name, target_p->username, |
814 |
target_p->host, member->chptr->name); |
815 |
|
816 |
if (nickbuf[0]) |
817 |
sendto_channel_local(target_p, member->chptr, 0, 0, CAP_CHGHOST, ":%s MODE %s +%s %s", |
818 |
target_p->servptr->name, member->chptr->name, |
819 |
modebuf, nickbuf); |
820 |
} |
821 |
|
822 |
if (target_p->away[0]) |
823 |
sendto_common_channels_local(target_p, 0, CAP_AWAY_NOTIFY, CAP_CHGHOST, |
824 |
":%s!%s@%s AWAY :%s", |
825 |
target_p->name, target_p->username, |
826 |
target_p->host, target_p->away); |
827 |
} |