1 |
/* |
2 |
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
3 |
* |
4 |
* Copyright (c) 1997-2015 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 m_nick.c |
23 |
* \brief Includes required functions for processing the NICK command. |
24 |
* \version $Id$ |
25 |
*/ |
26 |
|
27 |
#include "stdinc.h" |
28 |
#include "list.h" |
29 |
#include "hash.h" |
30 |
#include "fdlist.h" |
31 |
#include "irc_string.h" |
32 |
#include "ircd.h" |
33 |
#include "numeric.h" |
34 |
#include "conf.h" |
35 |
#include "user.h" |
36 |
#include "whowas.h" |
37 |
#include "send.h" |
38 |
#include "channel_mode.h" |
39 |
#include "resv.h" |
40 |
#include "parse.h" |
41 |
#include "modules.h" |
42 |
#include "packet.h" |
43 |
#include "watch.h" |
44 |
#include "misc.h" |
45 |
#include "id.h" |
46 |
|
47 |
|
48 |
/* check_clean_nick() |
49 |
* |
50 |
* input - pointer to source |
51 |
* - |
52 |
* - nickname |
53 |
* - truncated nickname |
54 |
* - origin of client |
55 |
* - pointer to server nick is coming from |
56 |
* output - none |
57 |
* side effects - if nickname is erroneous, or a different length to |
58 |
* truncated nickname, return 1 |
59 |
*/ |
60 |
static int |
61 |
check_clean_nick(struct Client *source_p, const char *nick) |
62 |
{ |
63 |
assert(IsServer(source_p) || (IsClient(source_p) && !MyConnect(source_p))); |
64 |
|
65 |
/* |
66 |
* The old code did some wacky stuff here, if the nick is invalid, kill it |
67 |
* and don't bother messing at all |
68 |
*/ |
69 |
if (valid_nickname(nick, 0)) |
70 |
return 0; |
71 |
|
72 |
++ServerStats.is_kill; |
73 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, "Bad/long Nick: %s From: %s(via %s)", |
74 |
nick, IsServer(source_p) ? source_p->name : source_p->servptr->name, |
75 |
source_p->from->name); |
76 |
sendto_one(source_p, ":%s KILL %s :%s (Bad Nickname)", |
77 |
me.id, nick, me.name); |
78 |
|
79 |
/* Bad nick change */ |
80 |
if (!IsServer(source_p)) |
81 |
{ |
82 |
sendto_server(source_p, 0, 0, ":%s KILL %s :%s (Bad Nickname)", |
83 |
me.id, source_p->id, me.name); |
84 |
AddFlag(source_p, FLAGS_KILLED); |
85 |
exit_client(source_p, "Bad Nickname"); |
86 |
} |
87 |
|
88 |
return 1; |
89 |
} |
90 |
|
91 |
static int |
92 |
check_clean_uid(struct Client *source_p, const char *nick, const char *uid) |
93 |
{ |
94 |
assert(IsServer(source_p)); |
95 |
|
96 |
if (valid_uid(uid) && strncmp(uid, source_p->id, IRC_MAXSID) == 0) |
97 |
return 0; |
98 |
|
99 |
++ServerStats.is_kill; |
100 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
101 |
"Bad UID: %s Nickname: %s From: %s(via %s)", |
102 |
uid, nick, source_p->name, source_p->from->name); |
103 |
sendto_one(source_p, ":%s KILL %s :%s (Bad UID)", |
104 |
me.id, uid, me.name); |
105 |
return 1; |
106 |
} |
107 |
|
108 |
/* check_clean_user() |
109 |
* |
110 |
* input - pointer to client sending data |
111 |
* - nickname |
112 |
* - username to check |
113 |
* - origin of NICK |
114 |
* output - none |
115 |
* side effects - if username is erroneous, return 1 |
116 |
*/ |
117 |
static int |
118 |
check_clean_user(struct Client *source_p, const char *nick, const char *user) |
119 |
{ |
120 |
assert(IsServer(source_p)); |
121 |
|
122 |
if (valid_username(user, 0)) |
123 |
return 0; |
124 |
|
125 |
++ServerStats.is_kill; |
126 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
127 |
"Bad/Long Username: %s Nickname: %s From: %s(via %s)", |
128 |
user, nick, source_p->name, source_p->from->name); |
129 |
sendto_one(source_p, ":%s KILL %s :%s (Bad Username)", |
130 |
me.id, nick, me.name); |
131 |
return 1; |
132 |
} |
133 |
|
134 |
/* check_clean_host() |
135 |
* |
136 |
* input - pointer to client sending us data |
137 |
* - nickname |
138 |
* - hostname to check |
139 |
* - source name |
140 |
* output - none |
141 |
* side effects - if hostname is erroneous, return 1 |
142 |
*/ |
143 |
static int |
144 |
check_clean_host(struct Client *source_p, const char *nick, const char *host) |
145 |
{ |
146 |
assert(IsServer(source_p)); |
147 |
|
148 |
if (valid_hostname(host)) |
149 |
return 0; |
150 |
|
151 |
++ServerStats.is_kill; |
152 |
sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
153 |
"Bad/Long Hostname: %s Nickname: %s From: %s(via %s)", |
154 |
host, nick, source_p->name, source_p->from->name); |
155 |
sendto_one(source_p, ":%s KILL %s :%s (Bad Hostname)", |
156 |
me.id, nick, me.name); |
157 |
return 1; |
158 |
} |
159 |
|
160 |
/* set_initial_nick() |
161 |
* |
162 |
* inputs |
163 |
* output |
164 |
* side effects - |
165 |
* |
166 |
* This function is only called to set up an initially registering |
167 |
* client. |
168 |
*/ |
169 |
static void |
170 |
set_initial_nick(struct Client *source_p, const char *nick) |
171 |
{ |
172 |
const int samenick = !irccmp(source_p->name, nick); |
173 |
|
174 |
if (!samenick) |
175 |
source_p->tsinfo = CurrentTime; |
176 |
|
177 |
source_p->connection->registration &= ~REG_NEED_NICK; |
178 |
|
179 |
if (source_p->name[0]) |
180 |
hash_del_client(source_p); |
181 |
|
182 |
strlcpy(source_p->name, nick, sizeof(source_p->name)); |
183 |
hash_add_client(source_p); |
184 |
|
185 |
/* fd_desc is long enough */ |
186 |
fd_note(&source_p->connection->fd, "Nick: %s", source_p->name); |
187 |
|
188 |
if (!source_p->connection->registration) |
189 |
register_local_user(source_p); |
190 |
} |
191 |
|
192 |
/* change_local_nick() |
193 |
* |
194 |
* inputs - pointer to server |
195 |
* - pointer to client |
196 |
* - nick |
197 |
* output - |
198 |
* side effects - changes nick of a LOCAL user |
199 |
*/ |
200 |
static void |
201 |
change_local_nick(struct Client *source_p, const char *nick) |
202 |
{ |
203 |
int samenick = 0; |
204 |
|
205 |
assert(source_p->name[0] && !EmptyString(nick)); |
206 |
assert(MyClient(source_p)); |
207 |
|
208 |
/* |
209 |
* Client just changing his/her nick. If he/she is |
210 |
* on a channel, send note of change to all clients |
211 |
* on that channel. Propagate notice to other servers. |
212 |
*/ |
213 |
if ((source_p->connection->nick.last_attempt + |
214 |
ConfigGeneral.max_nick_time) < CurrentTime) |
215 |
source_p->connection->nick.count = 0; |
216 |
|
217 |
if (ConfigGeneral.anti_nick_flood && |
218 |
!HasUMode(source_p, UMODE_OPER) && |
219 |
source_p->connection->nick.count > |
220 |
ConfigGeneral.max_nick_changes) |
221 |
{ |
222 |
sendto_one_numeric(source_p, &me, ERR_NICKTOOFAST, nick, |
223 |
ConfigGeneral.max_nick_time); |
224 |
return; |
225 |
} |
226 |
|
227 |
source_p->connection->nick.last_attempt = CurrentTime; |
228 |
source_p->connection->nick.count++; |
229 |
|
230 |
samenick = !irccmp(source_p->name, nick); |
231 |
|
232 |
if (!samenick) |
233 |
{ |
234 |
source_p->tsinfo = CurrentTime; |
235 |
clear_ban_cache_client(source_p); |
236 |
watch_check_hash(source_p, RPL_LOGOFF); |
237 |
|
238 |
if (HasUMode(source_p, UMODE_REGISTERED)) |
239 |
{ |
240 |
unsigned int oldmodes = source_p->umodes; |
241 |
char modebuf[IRCD_BUFSIZE] = ""; |
242 |
|
243 |
DelUMode(source_p, UMODE_REGISTERED); |
244 |
send_umode(source_p, source_p, oldmodes, modebuf); |
245 |
} |
246 |
} |
247 |
|
248 |
sendto_realops_flags(UMODE_NCHANGE, L_ALL, SEND_NOTICE, |
249 |
"Nick change: From %s to %s [%s@%s]", |
250 |
source_p->name, nick, source_p->username, source_p->host); |
251 |
sendto_common_channels_local(source_p, 1, 0, 0, ":%s!%s@%s NICK :%s", |
252 |
source_p->name, source_p->username, |
253 |
source_p->host, nick); |
254 |
whowas_add_history(source_p, 1); |
255 |
|
256 |
sendto_server(source_p, 0, 0, ":%s NICK %s :%ju", |
257 |
source_p->id, nick, source_p->tsinfo); |
258 |
|
259 |
hash_del_client(source_p); |
260 |
strlcpy(source_p->name, nick, sizeof(source_p->name)); |
261 |
hash_add_client(source_p); |
262 |
|
263 |
if (!samenick) |
264 |
watch_check_hash(source_p, RPL_LOGON); |
265 |
|
266 |
/* fd_desc is long enough */ |
267 |
fd_note(&source_p->connection->fd, "Nick: %s", source_p->name); |
268 |
} |
269 |
|
270 |
/*! |
271 |
* |
272 |
* \param source_p Pointer to allocated Client struct from which the message |
273 |
* originally comes from. This can be a local or remote client. |
274 |
* \param parc Integer holding the number of supplied arguments. |
275 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
276 |
* pointers. |
277 |
* \note Valid arguments for this command are: |
278 |
* |
279 |
* - parv[0] = command |
280 |
* - parv[1] = nickname |
281 |
* - parv[2] = timestamp |
282 |
*/ |
283 |
static void |
284 |
change_remote_nick(struct Client *source_p, char *parv[]) |
285 |
{ |
286 |
const int samenick = !irccmp(source_p->name, parv[1]); |
287 |
|
288 |
assert(!EmptyString(parv[1])); |
289 |
assert(IsClient(source_p)); |
290 |
assert(source_p->name[0]); |
291 |
|
292 |
/* Client changing their nick */ |
293 |
if (!samenick) |
294 |
{ |
295 |
DelUMode(source_p, UMODE_REGISTERED); |
296 |
watch_check_hash(source_p, RPL_LOGOFF); |
297 |
source_p->tsinfo = strtoimax(parv[2], NULL, 10); |
298 |
assert(source_p->tsinfo > 0); |
299 |
} |
300 |
|
301 |
sendto_common_channels_local(source_p, 1, 0, 0, ":%s!%s@%s NICK :%s", |
302 |
source_p->name, source_p->username, |
303 |
source_p->host, parv[1]); |
304 |
|
305 |
whowas_add_history(source_p, 1); |
306 |
sendto_server(source_p, 0, 0, ":%s NICK %s :%ju", |
307 |
source_p->id, parv[1], source_p->tsinfo); |
308 |
|
309 |
/* Set the new nick name */ |
310 |
hash_del_client(source_p); |
311 |
strlcpy(source_p->name, parv[1], sizeof(source_p->name)); |
312 |
hash_add_client(source_p); |
313 |
|
314 |
if (!samenick) |
315 |
watch_check_hash(source_p, RPL_LOGON); |
316 |
} |
317 |
|
318 |
/*! |
319 |
* |
320 |
* \param source_p Pointer to allocated Client struct from which the message |
321 |
* originally comes from. This can be a local or remote client. |
322 |
* \param parc Integer holding the number of supplied arguments. |
323 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
324 |
* pointers. |
325 |
* \note Valid arguments for this command are: |
326 |
* |
327 |
* server introducing new nick/UID (without services support) |
328 |
* - parv[0] = command |
329 |
* - parv[1] = nickname |
330 |
* - parv[2] = hop count |
331 |
* - parv[3] = TS |
332 |
* - parv[4] = umode |
333 |
* - parv[5] = username |
334 |
* - parv[6] = hostname |
335 |
* - parv[7] = ip |
336 |
* - parv[8] = uid |
337 |
* - parv[9] = ircname (gecos) |
338 |
* |
339 |
* server introducing new nick/UID (with services support) |
340 |
* - parv[ 0] = command |
341 |
* - parv[ 1] = nickname |
342 |
* - parv[ 2] = hop count |
343 |
* - parv[ 3] = TS |
344 |
* - parv[ 4] = umode |
345 |
* - parv[ 5] = username |
346 |
* - parv[ 6] = hostname |
347 |
* - parv[ 7] = ip |
348 |
* - parv[ 8] = uid |
349 |
* - parv[ 9] = services account |
350 |
* - parv[10] = ircname (gecos) |
351 |
*/ |
352 |
static void |
353 |
uid_from_server(struct Client *source_p, int parc, char *parv[]) |
354 |
{ |
355 |
struct Client *client_p = NULL; |
356 |
|
357 |
client_p = make_client(source_p->from); |
358 |
client_p->servptr = source_p; |
359 |
client_p->hopcount = atoi(parv[2]); |
360 |
client_p->tsinfo = strtoimax(parv[3], NULL, 10); |
361 |
|
362 |
strlcpy(client_p->account, (parc == 11 ? parv[9] : "*"), sizeof(client_p->account)); |
363 |
strlcpy(client_p->name, parv[1], sizeof(client_p->name)); |
364 |
strlcpy(client_p->id, parv[8], sizeof(client_p->id)); |
365 |
strlcpy(client_p->sockhost, parv[7], sizeof(client_p->sockhost)); |
366 |
strlcpy(client_p->info, parv[parc - 1], sizeof(client_p->info)); |
367 |
strlcpy(client_p->host, parv[6], sizeof(client_p->host)); |
368 |
strlcpy(client_p->username, parv[5], sizeof(client_p->username)); |
369 |
|
370 |
hash_add_client(client_p); |
371 |
hash_add_id(client_p); |
372 |
|
373 |
/* Parse user modes */ |
374 |
for (const char *m = &parv[4][1]; *m; ++m) |
375 |
{ |
376 |
const struct user_modes *tab = umode_map[(unsigned char)*m]; |
377 |
|
378 |
if (!tab) |
379 |
continue; |
380 |
if ((tab->flag & UMODE_INVISIBLE) && !HasUMode(client_p, UMODE_INVISIBLE)) |
381 |
++Count.invisi; |
382 |
if ((tab->flag & UMODE_OPER) && !HasUMode(client_p, UMODE_OPER)) |
383 |
++Count.oper; |
384 |
|
385 |
AddUMode(client_p, tab->flag); |
386 |
} |
387 |
|
388 |
register_remote_user(client_p); |
389 |
} |
390 |
|
391 |
/*! |
392 |
* |
393 |
* \param source_p Pointer to allocated Client struct from which the message |
394 |
* originally comes from. This can be a local or remote client. |
395 |
* \param parc Integer holding the number of supplied arguments. |
396 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
397 |
* pointers. |
398 |
* \note Valid arguments for this command are: |
399 |
* |
400 |
* server introducing new nick/UID (without services support) |
401 |
* - parv[0] = command |
402 |
* - parv[1] = nickname |
403 |
* - parv[2] = hop count |
404 |
* - parv[3] = TS |
405 |
* - parv[4] = umode |
406 |
* - parv[5] = username |
407 |
* - parv[6] = hostname |
408 |
* - parv[7] = ip |
409 |
* - parv[8] = uid |
410 |
* - parv[9] = ircname (gecos) |
411 |
* |
412 |
* server introducing new nick/UID (with services support) |
413 |
* - parv[ 0] = command |
414 |
* - parv[ 1] = nickname |
415 |
* - parv[ 2] = hop count |
416 |
* - parv[ 3] = TS |
417 |
* - parv[ 4] = umode |
418 |
* - parv[ 5] = username |
419 |
* - parv[ 6] = hostname |
420 |
* - parv[ 7] = ip |
421 |
* - parv[ 8] = uid |
422 |
* - parv[ 9] = services id (account name) |
423 |
* - parv[10] = ircname (gecos) |
424 |
*/ |
425 |
static int |
426 |
perform_uid_introduction_collides(struct Client *source_p, struct Client *target_p, |
427 |
int parc, char *parv[]) |
428 |
{ |
429 |
const char *uid = parv[8]; |
430 |
time_t newts = strtoimax(parv[3], NULL, 10); |
431 |
int sameuser = 0; |
432 |
|
433 |
assert(IsServer(source_p)); |
434 |
assert(IsClient(target_p)); |
435 |
|
436 |
/* Server introducing new nick */ |
437 |
|
438 |
/* If we don't have a TS, or their TS's are the same, kill both */ |
439 |
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
440 |
{ |
441 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
442 |
"Nick collision on %s(%s <- %s)(both killed)", |
443 |
target_p->name, target_p->from->name, |
444 |
source_p->from->name); |
445 |
|
446 |
sendto_one(source_p, ":%s KILL %s :%s (Nick collision (new))", |
447 |
me.id, uid, me.name); |
448 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision (new))", |
449 |
me.id, target_p->id, me.name); |
450 |
|
451 |
++ServerStats.is_kill; |
452 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
453 |
|
454 |
AddFlag(target_p, FLAGS_KILLED); |
455 |
exit_client(target_p, "Nick collision (new)"); |
456 |
return 0; |
457 |
} |
458 |
|
459 |
/* The timestamps are different */ |
460 |
sameuser = !irccmp(target_p->username, parv[5]) && |
461 |
!irccmp(target_p->sockhost, parv[7]); |
462 |
|
463 |
/* |
464 |
* If the users are the same (loaded a client on a different server) |
465 |
* and the new users ts is older, or the users are different and the |
466 |
* new users ts is newer, ignore the new client and let it do the kill |
467 |
*/ |
468 |
if ((sameuser && newts < target_p->tsinfo) || |
469 |
(!sameuser && newts > target_p->tsinfo)) |
470 |
{ |
471 |
sendto_one(source_p, ":%s KILL %s :%s (Nick collision (new))", |
472 |
me.id, uid, me.name); |
473 |
return 0; |
474 |
} |
475 |
|
476 |
if (sameuser) |
477 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
478 |
"Nick collision on %s(%s <- %s)(older killed)", |
479 |
target_p->name, target_p->from->name, |
480 |
source_p->from->name); |
481 |
else |
482 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
483 |
"Nick collision on %s(%s <- %s)(newer killed)", |
484 |
target_p->name, target_p->from->name, |
485 |
source_p->from->name); |
486 |
|
487 |
++ServerStats.is_kill; |
488 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
489 |
|
490 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision (new))", |
491 |
me.id, target_p->id, me.name); |
492 |
|
493 |
AddFlag(target_p, FLAGS_KILLED); |
494 |
exit_client(target_p, "Nick collision"); |
495 |
|
496 |
return 1; |
497 |
} |
498 |
|
499 |
/*! |
500 |
* |
501 |
* \param source_p Pointer to allocated Client struct from which the message |
502 |
* originally comes from. This can be a local or remote client. |
503 |
* \param parc Integer holding the number of supplied arguments. |
504 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
505 |
* pointers. |
506 |
* \note Valid arguments for this command are: |
507 |
* |
508 |
* - parv[0] = command |
509 |
* - parv[1] = nickname |
510 |
* - parv[2] = timestamp |
511 |
*/ |
512 |
static int |
513 |
perform_nick_change_collides(struct Client *source_p, struct Client *target_p, |
514 |
int parc, char *parv[]) |
515 |
{ |
516 |
int sameuser = 0; |
517 |
time_t newts = strtoimax(parv[2], NULL, 10); |
518 |
|
519 |
assert(IsClient(source_p)); |
520 |
assert(IsClient(target_p)); |
521 |
assert(newts > 0); |
522 |
|
523 |
/* It's a client changing nick and causing a collide */ |
524 |
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
525 |
{ |
526 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
527 |
"Nick change collision from %s to %s(%s <- %s)(both killed)", |
528 |
source_p->name, target_p->name, target_p->from->name, |
529 |
source_p->from->name); |
530 |
|
531 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
532 |
ServerStats.is_kill += 2; |
533 |
|
534 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
535 |
me.id, source_p->id, me.name); |
536 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
537 |
me.id, target_p->id, me.name); |
538 |
|
539 |
AddFlag(source_p, FLAGS_KILLED); |
540 |
AddFlag(target_p, FLAGS_KILLED); |
541 |
exit_client(source_p, "Nick collision (old)"); |
542 |
exit_client(target_p, "Nick collision (new)"); |
543 |
return 0; |
544 |
} |
545 |
|
546 |
/* The timestamps are different */ |
547 |
sameuser = !irccmp(target_p->username, source_p->username) && |
548 |
!irccmp(target_p->sockhost, source_p->sockhost); |
549 |
|
550 |
if ((sameuser && newts < target_p->tsinfo) || |
551 |
(!sameuser && newts > target_p->tsinfo)) |
552 |
{ |
553 |
if (sameuser) |
554 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
555 |
"Nick change collision from %s to %s(%s <- %s)(older killed)", |
556 |
source_p->name, target_p->name, target_p->from->name, |
557 |
source_p->from->name); |
558 |
else |
559 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
560 |
"Nick change collision from %s to %s(%s <- %s)(newer killed)", |
561 |
source_p->name, target_p->name, target_p->from->name, |
562 |
source_p->from->name); |
563 |
|
564 |
++ServerStats.is_kill; |
565 |
|
566 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
567 |
me.id, source_p->id, me.name); |
568 |
AddFlag(source_p, FLAGS_KILLED); |
569 |
|
570 |
if (sameuser) |
571 |
exit_client(source_p, "Nick collision (old)"); |
572 |
else |
573 |
exit_client(source_p, "Nick collision (new)"); |
574 |
return 0; |
575 |
} |
576 |
|
577 |
if (sameuser) |
578 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
579 |
"Nick collision on %s(%s <- %s)(older killed)", |
580 |
target_p->name, target_p->from->name, |
581 |
source_p->from->name); |
582 |
else |
583 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
584 |
"Nick collision on %s(%s <- %s)(newer killed)", |
585 |
target_p->name, target_p->from->name, |
586 |
source_p->from->name); |
587 |
|
588 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision)", |
589 |
me.id, target_p->id, me.name); |
590 |
|
591 |
++ServerStats.is_kill; |
592 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
593 |
|
594 |
AddFlag(target_p, FLAGS_KILLED); |
595 |
exit_client(target_p, "Nick collision"); |
596 |
|
597 |
return 1; |
598 |
} |
599 |
|
600 |
/*! \brief NICK command handler |
601 |
* |
602 |
* \param source_p Pointer to allocated Client struct from which the message |
603 |
* originally comes from. This can be a local or remote client. |
604 |
* \param parc Integer holding the number of supplied arguments. |
605 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
606 |
* pointers. |
607 |
* \note Valid arguments for this command are: |
608 |
* - parv[0] = command |
609 |
* - parv[1] = nickname |
610 |
*/ |
611 |
static int |
612 |
mr_nick(struct Client *source_p, int parc, char *parv[]) |
613 |
{ |
614 |
char nick[NICKLEN + 1] = ""; |
615 |
struct Client *target_p = NULL; |
616 |
struct MaskItem *conf = NULL; |
617 |
|
618 |
if (parc < 2 || EmptyString(parv[1])) |
619 |
{ |
620 |
sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN); |
621 |
return 0; |
622 |
} |
623 |
|
624 |
/* Copy the nick and terminate it */ |
625 |
strlcpy(nick, parv[1], IRCD_MIN(sizeof(nick), ConfigServerInfo.max_nick_length + 1)); |
626 |
|
627 |
/* Check the nickname is ok */ |
628 |
if (!valid_nickname(nick, 1)) |
629 |
{ |
630 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, parv[1], "Erroneous Nickname"); |
631 |
return 0; |
632 |
} |
633 |
|
634 |
/* Check if the nick is resv'd */ |
635 |
if ((conf = find_matching_name_conf(CONF_NRESV, nick, NULL, NULL, 0))) |
636 |
{ |
637 |
++conf->count; |
638 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, conf->reason); |
639 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
640 |
"Forbidding reserved nick %s from user %s", |
641 |
nick, get_client_name(source_p, HIDE_IP)); |
642 |
return 0; |
643 |
} |
644 |
|
645 |
if ((target_p = hash_find_client(nick)) == NULL || target_p == source_p) |
646 |
set_initial_nick(source_p, nick); |
647 |
else |
648 |
sendto_one_numeric(source_p, &me, ERR_NICKNAMEINUSE, target_p->name); |
649 |
|
650 |
return 0; |
651 |
} |
652 |
|
653 |
/*! \brief NICK command handler |
654 |
* |
655 |
* \param source_p Pointer to allocated Client struct from which the message |
656 |
* originally comes from. This can be a local or remote client. |
657 |
* \param parc Integer holding the number of supplied arguments. |
658 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
659 |
* pointers. |
660 |
* \note Valid arguments for this command are: |
661 |
* - parv[0] = command |
662 |
* - parv[1] = nickname |
663 |
*/ |
664 |
static int |
665 |
m_nick(struct Client *source_p, int parc, char *parv[]) |
666 |
{ |
667 |
char nick[NICKLEN + 1] = ""; |
668 |
struct Client *target_p = NULL; |
669 |
struct MaskItem *conf = NULL; |
670 |
|
671 |
assert(MyClient(source_p)); |
672 |
|
673 |
if (parc < 2 || EmptyString(parv[1])) |
674 |
{ |
675 |
sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN); |
676 |
return 0; |
677 |
} |
678 |
|
679 |
/* Mark end of grace period, to prevent nickflooding */ |
680 |
if (!IsFloodDone(source_p)) |
681 |
flood_endgrace(source_p); |
682 |
|
683 |
/* Terminate nick to NICKLEN */ |
684 |
strlcpy(nick, parv[1], IRCD_MIN(sizeof(nick), ConfigServerInfo.max_nick_length + 1)); |
685 |
|
686 |
/* Check the nickname is ok */ |
687 |
if (!valid_nickname(nick, 1)) |
688 |
{ |
689 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, "Erroneous Nickname"); |
690 |
return 0; |
691 |
} |
692 |
|
693 |
if (!HasFlag(source_p, FLAGS_EXEMPTRESV) && |
694 |
!(HasUMode(source_p, UMODE_OPER) && HasOFlag(source_p, OPER_FLAG_NICK_RESV)) && |
695 |
(conf = find_matching_name_conf(CONF_NRESV, nick, NULL, NULL, 0))) |
696 |
{ |
697 |
++conf->count; |
698 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, conf->reason); |
699 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
700 |
"Forbidding reserved nick %s from user %s", |
701 |
nick, get_client_name(source_p, HIDE_IP)); |
702 |
return 0; |
703 |
} |
704 |
|
705 |
if ((target_p = hash_find_client(nick)) == NULL) |
706 |
change_local_nick(source_p, nick); |
707 |
else if (target_p == source_p) |
708 |
{ |
709 |
/* |
710 |
* If (target_p == source_p) the client is changing nicks between |
711 |
* equivalent nicknames ie: [nick] -> {nick} |
712 |
*/ |
713 |
|
714 |
/* Check the nick isn't exactly the same */ |
715 |
if (strcmp(target_p->name, nick)) |
716 |
change_local_nick(source_p, nick); |
717 |
} |
718 |
else if (IsUnknown(target_p)) |
719 |
{ |
720 |
/* |
721 |
* If the client that has the nick isn't registered yet (nick but no |
722 |
* user) then drop the unregged client |
723 |
*/ |
724 |
exit_client(target_p, "Overridden by other sign on"); |
725 |
change_local_nick(source_p, nick); |
726 |
} |
727 |
else |
728 |
sendto_one_numeric(source_p, &me, ERR_NICKNAMEINUSE, target_p->name); |
729 |
|
730 |
return 0; |
731 |
} |
732 |
|
733 |
/*! \brief NICK command handler |
734 |
* |
735 |
* \param source_p Pointer to allocated Client struct from which the message |
736 |
* originally comes from. This can be a local or remote client. |
737 |
* \param parc Integer holding the number of supplied arguments. |
738 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
739 |
* pointers. |
740 |
* \note Valid arguments for this command are: |
741 |
* |
742 |
* server -> server nick change |
743 |
* - parv[0] = command |
744 |
* - parv[1] = nickname |
745 |
* - parv[2] = timestamp |
746 |
*/ |
747 |
static int |
748 |
ms_nick(struct Client *source_p, int parc, char *parv[]) |
749 |
{ |
750 |
struct Client *target_p = NULL; |
751 |
|
752 |
if (parc != 3 || EmptyString(parv[parc - 1])) |
753 |
return 0; |
754 |
|
755 |
if (!IsClient(source_p)) |
756 |
return 0; /* Servers and unknown clients can't change nicks.. */ |
757 |
|
758 |
if (check_clean_nick(source_p, parv[1])) |
759 |
return 0; |
760 |
|
761 |
/* If the nick doesn't exist, allow it and process like normal */ |
762 |
if ((target_p = hash_find_client(parv[1])) == NULL) |
763 |
change_remote_nick(source_p, parv); |
764 |
else if (IsUnknown(target_p)) |
765 |
{ |
766 |
/* We're not living in the past anymore, an unknown client is local only. */ |
767 |
exit_client(target_p, "Overridden by other sign on"); |
768 |
change_remote_nick(source_p, parv); |
769 |
} |
770 |
else if (target_p == source_p) |
771 |
{ |
772 |
if (strcmp(target_p->name, parv[1])) |
773 |
change_remote_nick(source_p, parv); |
774 |
} |
775 |
else if (perform_nick_change_collides(source_p, target_p, parc, parv)) |
776 |
change_remote_nick(source_p, parv); |
777 |
return 0; |
778 |
} |
779 |
|
780 |
/*! \brief UID command handler |
781 |
* |
782 |
* \param source_p Pointer to allocated Client struct from which the message |
783 |
* originally comes from. This can be a local or remote client. |
784 |
* \param parc Integer holding the number of supplied arguments. |
785 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
786 |
* pointers. |
787 |
* \note Valid arguments for this command are: |
788 |
* |
789 |
* server introducing new nick/UID (without services support) |
790 |
* - parv[0] = command |
791 |
* - parv[1] = nickname |
792 |
* - parv[2] = hop count |
793 |
* - parv[3] = TS |
794 |
* - parv[4] = umode |
795 |
* - parv[5] = username |
796 |
* - parv[6] = hostname |
797 |
* - parv[7] = ip |
798 |
* - parv[8] = uid |
799 |
* - parv[9] = ircname (gecos) |
800 |
* |
801 |
* server introducing new nick/UID (with services support) |
802 |
* - parv[ 0] = command |
803 |
* - parv[ 1] = nickname |
804 |
* - parv[ 2] = hop count |
805 |
* - parv[ 3] = TS |
806 |
* - parv[ 4] = umode |
807 |
* - parv[ 5] = username |
808 |
* - parv[ 6] = hostname |
809 |
* - parv[ 7] = ip |
810 |
* - parv[ 8] = uid |
811 |
* - parv[ 9] = services id (account name) |
812 |
* - parv[10] = ircname (gecos) |
813 |
*/ |
814 |
static int |
815 |
ms_uid(struct Client *source_p, int parc, char *parv[]) |
816 |
{ |
817 |
struct Client *target_p = NULL; |
818 |
|
819 |
if (check_clean_nick(source_p, parv[1]) || |
820 |
check_clean_user(source_p, parv[1], parv[5]) || |
821 |
check_clean_host(source_p, parv[1], parv[6]) || |
822 |
check_clean_uid(source_p, parv[1], parv[8])) |
823 |
return 0; |
824 |
|
825 |
/* |
826 |
* If there is an ID collision, kill our client, and kill theirs. |
827 |
* This may generate 401's, but it ensures that both clients always |
828 |
* go, even if the other server refuses to do the right thing. |
829 |
*/ |
830 |
if ((target_p = hash_find_id(parv[8]))) |
831 |
{ |
832 |
sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE, |
833 |
"ID collision on %s(%s <- %s)(both killed)", |
834 |
target_p->name, target_p->from->name, |
835 |
source_p->from->name); |
836 |
|
837 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (ID collision)", |
838 |
me.id, target_p->id, me.name); |
839 |
|
840 |
++ServerStats.is_kill; |
841 |
AddFlag(target_p, FLAGS_KILLED); |
842 |
exit_client(target_p, "ID Collision"); |
843 |
return 0; |
844 |
} |
845 |
|
846 |
if ((target_p = hash_find_client(parv[1])) == NULL) |
847 |
uid_from_server(source_p, parc, parv); |
848 |
else if (IsUnknown(target_p)) |
849 |
{ |
850 |
exit_client(target_p, "Overridden by other sign on"); |
851 |
uid_from_server(source_p, parc, parv); |
852 |
} |
853 |
else if (perform_uid_introduction_collides(source_p, target_p, parc, parv)) |
854 |
uid_from_server(source_p, parc, parv); |
855 |
return 0; |
856 |
} |
857 |
|
858 |
static struct Message nick_msgtab = |
859 |
{ |
860 |
.cmd = "NICK", |
861 |
.args_max = MAXPARA, |
862 |
.handlers[UNREGISTERED_HANDLER] = mr_nick, |
863 |
.handlers[CLIENT_HANDLER] = m_nick, |
864 |
.handlers[SERVER_HANDLER] = ms_nick, |
865 |
.handlers[ENCAP_HANDLER] = m_ignore, |
866 |
.handlers[OPER_HANDLER] = m_nick |
867 |
}; |
868 |
|
869 |
static struct Message uid_msgtab = |
870 |
{ |
871 |
.cmd = "UID", |
872 |
.args_min = 10, |
873 |
.args_max = MAXPARA, |
874 |
.handlers[UNREGISTERED_HANDLER] = m_ignore, |
875 |
.handlers[CLIENT_HANDLER] = m_ignore, |
876 |
.handlers[SERVER_HANDLER] = ms_uid, |
877 |
.handlers[ENCAP_HANDLER] = m_ignore, |
878 |
.handlers[OPER_HANDLER] = m_ignore |
879 |
}; |
880 |
|
881 |
static void |
882 |
module_init(void) |
883 |
{ |
884 |
mod_add_cmd(&uid_msgtab); |
885 |
mod_add_cmd(&nick_msgtab); |
886 |
} |
887 |
|
888 |
static void |
889 |
module_exit(void) |
890 |
{ |
891 |
mod_del_cmd(&uid_msgtab); |
892 |
mod_del_cmd(&nick_msgtab); |
893 |
} |
894 |
|
895 |
struct module module_entry = |
896 |
{ |
897 |
.version = "$Revision$", |
898 |
.modinit = module_init, |
899 |
.modexit = module_exit, |
900 |
.flags = MODULE_FLAG_CORE |
901 |
}; |