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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_nick.c: Sets a users nick. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | * $Id: m_nick.c 3518 2007-06-22 21:59:09Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "client.h" | |
29 | #include "hash.h" | |
30 | #include "match.h" | |
31 | #include "ircd.h" | |
32 | #include "numeric.h" | |
33 | #include "s_conf.h" | |
34 | #include "s_stats.h" | |
35 | #include "s_user.h" | |
36 | #include "hash.h" | |
37 | #include "whowas.h" | |
38 | #include "s_serv.h" | |
39 | #include "send.h" | |
40 | #include "channel.h" | |
41 | #include "logger.h" | |
42 | #include "msg.h" | |
43 | #include "parse.h" | |
44 | #include "modules.h" | |
45 | #include "common.h" | |
46 | #include "packet.h" | |
47 | #include "scache.h" | |
48 | #include "s_newconf.h" | |
49 | #include "monitor.h" | |
50 | ||
51 | /* Give all UID nicks the same TS. This ensures nick TS is always the same on | |
52 | * all servers for each nick-user pair, also if a user with a UID nick changes | |
53 | * their nick but is collided again (the server detecting the collision will | |
54 | * not propagate the nick change further). -- jilles | |
55 | */ | |
56 | #define SAVE_NICKTS 100 | |
57 | ||
58 | static int mr_nick(struct Client *, struct Client *, int, const char **); | |
59 | static int m_nick(struct Client *, struct Client *, int, const char **); | |
60 | static int mc_nick(struct Client *, struct Client *, int, const char **); | |
61 | static int ms_nick(struct Client *, struct Client *, int, const char **); | |
62 | static int ms_uid(struct Client *, struct Client *, int, const char **); | |
63 | static int ms_euid(struct Client *, struct Client *, int, const char **); | |
64 | static int ms_save(struct Client *, struct Client *, int, const char **); | |
65 | static int can_save(struct Client *); | |
66 | static void save_user(struct Client *, struct Client *, struct Client *); | |
67 | static void bad_nickname(struct Client *, const char *); | |
68 | ||
69 | struct Message nick_msgtab = { | |
70 | "NICK", 0, 0, 0, MFLG_SLOW, | |
71 | {{mr_nick, 0}, {m_nick, 0}, {mc_nick, 3}, {ms_nick, 0}, mg_ignore, {m_nick, 0}} | |
72 | }; | |
73 | struct Message uid_msgtab = { | |
74 | "UID", 0, 0, 0, MFLG_SLOW, | |
75 | {mg_ignore, mg_ignore, mg_ignore, {ms_uid, 9}, mg_ignore, mg_ignore} | |
76 | }; | |
77 | struct Message euid_msgtab = { | |
78 | "EUID", 0, 0, 0, MFLG_SLOW, | |
79 | {mg_ignore, mg_ignore, mg_ignore, {ms_euid, 12}, mg_ignore, mg_ignore} | |
80 | }; | |
81 | struct Message save_msgtab = { | |
82 | "SAVE", 0, 0, 0, MFLG_SLOW, | |
83 | {mg_ignore, mg_ignore, mg_ignore, {ms_save, 3}, mg_ignore, mg_ignore} | |
84 | }; | |
85 | ||
86 | mapi_clist_av1 nick_clist[] = { &nick_msgtab, &uid_msgtab, &euid_msgtab, | |
87 | &save_msgtab, NULL }; | |
88 | ||
89 | DECLARE_MODULE_AV1(nick, NULL, NULL, nick_clist, NULL, NULL, "$Revision: 3518 $"); | |
90 | ||
91 | static int change_remote_nick(struct Client *, struct Client *, time_t, | |
92 | const char *, int); | |
93 | ||
94 | static int clean_nick(const char *, int loc_client); | |
95 | static int clean_username(const char *); | |
96 | static int clean_host(const char *); | |
97 | static int clean_uid(const char *uid, const char *sid); | |
98 | ||
99 | static void set_initial_nick(struct Client *client_p, struct Client *source_p, char *nick); | |
100 | static void change_local_nick(struct Client *client_p, struct Client *source_p, char *nick, int); | |
101 | static int register_client(struct Client *client_p, struct Client *server, | |
102 | const char *nick, time_t newts, int parc, const char *parv[]); | |
103 | ||
104 | static int perform_nick_collides(struct Client *, struct Client *, | |
105 | struct Client *, int, const char **, | |
106 | time_t, const char *, const char *); | |
107 | static int perform_nickchange_collides(struct Client *, struct Client *, | |
108 | struct Client *, int, const char **, time_t, const char *); | |
109 | ||
110 | /* mr_nick() | |
111 | * parv[1] = nickname | |
112 | */ | |
113 | static int | |
114 | mr_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
115 | { | |
116 | struct Client *target_p; | |
117 | char nick[NICKLEN]; | |
118 | ||
119 | if (strlen(client_p->id) == 3) | |
120 | { | |
121 | exit_client(client_p, client_p, client_p, "Mixing client and server protocol"); | |
122 | return 0; | |
123 | } | |
124 | ||
125 | if(parc < 2 || EmptyString(parv[1])) | |
126 | { | |
127 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), | |
128 | me.name, EmptyString(source_p->name) ? "*" : source_p->name); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | /* copy the nick and terminate it */ | |
133 | rb_strlcpy(nick, parv[1], ConfigFileEntry.nicklen); | |
134 | ||
135 | /* check the nickname is ok */ | |
136 | if(!clean_nick(nick, 1)) | |
137 | { | |
138 | sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), | |
139 | me.name, EmptyString(source_p->name) ? "*" : source_p->name, parv[1]); | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* check if the nick is resv'd */ | |
144 | if(find_nick_resv(nick)) | |
145 | { | |
146 | sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), | |
147 | me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick); | |
148 | return 0; | |
149 | } | |
150 | ||
151 | if(irc_dictionary_find(nd_dict, nick)) | |
152 | { | |
153 | sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE), | |
154 | me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick); | |
155 | return 0; | |
156 | } | |
157 | ||
158 | if((target_p = find_named_client(nick)) == NULL) | |
159 | set_initial_nick(client_p, source_p, nick); | |
160 | else if(source_p == target_p) | |
161 | strcpy(source_p->name, nick); | |
162 | else | |
163 | sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, "*", nick); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | /* m_nick() | |
169 | * parv[1] = nickname | |
170 | */ | |
171 | static int | |
172 | m_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
173 | { | |
174 | struct Client *target_p; | |
175 | char nick[NICKLEN]; | |
176 | ||
177 | if(parc < 2 || EmptyString(parv[1])) | |
178 | { | |
179 | sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), me.name, source_p->name); | |
180 | return 0; | |
181 | } | |
182 | ||
183 | /* mark end of grace period, to prevent nickflooding */ | |
184 | if(!IsFloodDone(source_p)) | |
185 | flood_endgrace(source_p); | |
186 | ||
187 | /* terminate nick to NICKLEN, we dont want clean_nick() to error! */ | |
188 | rb_strlcpy(nick, parv[1], ConfigFileEntry.nicklen); | |
189 | ||
190 | /* check the nickname is ok */ | |
191 | if(!clean_nick(nick, 1)) | |
192 | { | |
193 | sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, source_p->name, nick); | |
194 | return 0; | |
195 | } | |
196 | ||
197 | if(!IsExemptResv(source_p) && find_nick_resv(nick)) | |
198 | { | |
199 | sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, source_p->name, nick); | |
200 | return 0; | |
201 | } | |
202 | ||
203 | if(irc_dictionary_find(nd_dict, nick)) | |
204 | { | |
205 | sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE), | |
206 | me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick); | |
207 | return 0; | |
208 | } | |
209 | ||
210 | if((target_p = find_named_client(nick))) | |
211 | { | |
212 | /* If(target_p == source_p) the client is changing nicks between | |
213 | * equivalent nicknames ie: [nick] -> {nick} | |
214 | */ | |
215 | if(target_p == source_p) | |
216 | { | |
217 | /* check the nick isnt exactly the same */ | |
218 | if(strcmp(target_p->name, nick)) | |
219 | change_local_nick(client_p, source_p, nick, 1); | |
220 | ||
221 | } | |
222 | ||
223 | /* drop unregged client */ | |
224 | else if(IsUnknown(target_p)) | |
225 | { | |
226 | exit_client(NULL, target_p, &me, "Overridden"); | |
227 | change_local_nick(client_p, source_p, nick, 1); | |
228 | } | |
229 | else | |
230 | sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, source_p->name, nick); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | else | |
235 | change_local_nick(client_p, source_p, nick, 1); | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | /* mc_nick() | |
241 | * | |
242 | * server -> server nick change | |
243 | * parv[1] = nickname | |
244 | * parv[2] = TS when nick change | |
245 | */ | |
246 | static int | |
247 | mc_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
248 | { | |
249 | struct Client *target_p; | |
250 | time_t newts = 0; | |
251 | ||
252 | /* if nicks erroneous, or too long, kill */ | |
253 | if(!clean_nick(parv[1], 0)) | |
254 | { | |
255 | bad_nickname(client_p, parv[1]); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | newts = atol(parv[2]); | |
260 | target_p = find_named_client(parv[1]); | |
261 | ||
262 | /* if the nick doesnt exist, allow it and process like normal */ | |
263 | if(target_p == NULL) | |
264 | { | |
265 | change_remote_nick(client_p, source_p, newts, parv[1], 1); | |
266 | } | |
267 | else if(IsUnknown(target_p)) | |
268 | { | |
269 | exit_client(NULL, target_p, &me, "Overridden"); | |
270 | change_remote_nick(client_p, source_p, newts, parv[1], 1); | |
271 | } | |
272 | else if(target_p == source_p) | |
273 | { | |
274 | /* client changing case of nick */ | |
275 | if(strcmp(target_p->name, parv[1])) | |
276 | change_remote_nick(client_p, source_p, newts, parv[1], 1); | |
277 | } | |
278 | /* we've got a collision! */ | |
279 | else | |
280 | perform_nickchange_collides(source_p, client_p, target_p, | |
281 | parc, parv, newts, parv[1]); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | static int | |
287 | ms_nick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
288 | { | |
289 | const char *nick, *server; | |
290 | ||
291 | nick = parc > 1 ? parv[1] : "?"; | |
292 | server = parc > 7 ? parv[7] : "?"; | |
293 | ||
294 | sendto_wallops_flags(UMODE_WALLOP, &me, | |
295 | "Link %s cancelled, TS5 nickname %s on %s introduced (old server?)", | |
296 | client_p->name, nick, server); | |
297 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
298 | ":%s WALLOPS :Link %s cancelled, TS5 nickname %s on %s introduced (old server?)", | |
299 | me.id, client_p->name, nick, server); | |
300 | ilog(L_SERVER, "Link %s cancelled, TS5 nickname %s on %s introduced (old server?)", | |
301 | client_p->name, nick, server); | |
302 | ||
303 | exit_client(client_p, client_p, &me, "TS5 nickname introduced"); | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | /* ms_uid() | |
309 | * parv[1] - nickname | |
310 | * parv[2] - hops | |
311 | * parv[3] - TS | |
312 | * parv[4] - umodes | |
313 | * parv[5] - username | |
314 | * parv[6] - hostname | |
315 | * parv[7] - IP | |
316 | * parv[8] - UID | |
317 | * parv[9] - gecos | |
318 | */ | |
319 | static int | |
320 | ms_uid(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
321 | { | |
322 | struct Client *target_p; | |
323 | time_t newts = 0; | |
324 | char squitreason[120]; | |
325 | ||
326 | newts = atol(parv[3]); | |
327 | ||
328 | if(parc != 10) | |
329 | { | |
330 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
331 | "Dropping server %s due to (invalid) command 'UID' " | |
332 | "with %d arguments (expecting 10)", client_p->name, parc); | |
333 | ilog(L_SERVER, "Excess parameters (%d) for command 'UID' from %s.", | |
334 | parc, client_p->name); | |
335 | rb_snprintf(squitreason, sizeof squitreason, | |
336 | "Excess parameters (%d) to %s command, expecting %d", | |
337 | parc, "UID", 10); | |
338 | exit_client(client_p, client_p, client_p, squitreason); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | /* if nicks erroneous, or too long, kill */ | |
343 | if(!clean_nick(parv[1], 0)) | |
344 | { | |
345 | bad_nickname(client_p, parv[1]); | |
346 | return 0; | |
347 | } | |
348 | ||
349 | if(!clean_uid(parv[8], source_p->id)) | |
350 | { | |
351 | rb_snprintf(squitreason, sizeof squitreason, | |
352 | "Invalid UID %s for nick %s on %s/%s", | |
353 | parv[8], parv[1], source_p->name, source_p->id); | |
354 | exit_client(client_p, client_p, client_p, squitreason); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | if(!clean_username(parv[5]) || !clean_host(parv[6])) | |
359 | { | |
360 | ServerStats.is_kill++; | |
361 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
362 | "Bad user@host: %s@%s From: %s(via %s)", | |
363 | parv[5], parv[6], source_p->name, client_p->name); | |
364 | sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | /* check length of clients gecos */ | |
369 | if(strlen(parv[9]) > REALLEN) | |
370 | { | |
371 | char *s = LOCAL_COPY(parv[9]); | |
372 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s", | |
373 | source_p->name, parv[1]); | |
374 | s[REALLEN] = '\0'; | |
375 | parv[9] = s; | |
376 | } | |
377 | ||
378 | target_p = find_named_client(parv[1]); | |
379 | ||
380 | if(target_p == NULL) | |
381 | { | |
382 | register_client(client_p, source_p, parv[1], newts, parc, parv); | |
383 | } | |
384 | else if(IsUnknown(target_p)) | |
385 | { | |
386 | exit_client(NULL, target_p, &me, "Overridden"); | |
387 | register_client(client_p, source_p, parv[1], newts, parc, parv); | |
388 | } | |
389 | /* we've got a collision! */ | |
390 | else | |
391 | perform_nick_collides(source_p, client_p, target_p, parc, parv, | |
392 | newts, parv[1], parv[8]); | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | /* ms_euid() | |
398 | * parv[1] - nickname | |
399 | * parv[2] - hops | |
400 | * parv[3] - TS | |
401 | * parv[4] - umodes | |
402 | * parv[5] - username | |
403 | * parv[6] - hostname | |
404 | * parv[7] - IP | |
405 | * parv[8] - UID | |
406 | * parv[9] - realhost | |
407 | * parv[10] - account | |
408 | * parv[11] - gecos | |
409 | */ | |
410 | static int | |
411 | ms_euid(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
412 | { | |
413 | struct Client *target_p; | |
414 | time_t newts = 0; | |
415 | char squitreason[120]; | |
416 | ||
417 | newts = atol(parv[3]); | |
418 | ||
419 | if(parc != 12) | |
420 | { | |
421 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
422 | "Dropping server %s due to (invalid) command 'EUID' " | |
423 | "with %d arguments (expecting 12)", client_p->name, parc); | |
424 | ilog(L_SERVER, "Excess parameters (%d) for command 'EUID' from %s.", | |
425 | parc, client_p->name); | |
426 | rb_snprintf(squitreason, sizeof squitreason, | |
427 | "Excess parameters (%d) to %s command, expecting %d", | |
428 | parc, "EUID", 12); | |
429 | exit_client(client_p, client_p, client_p, squitreason); | |
430 | return 0; | |
431 | } | |
432 | ||
433 | /* if nicks erroneous, or too long, kill */ | |
434 | if(!clean_nick(parv[1], 0)) | |
435 | { | |
436 | bad_nickname(client_p, parv[1]); | |
437 | return 0; | |
438 | } | |
439 | ||
440 | if(!clean_uid(parv[8], source_p->id)) | |
441 | { | |
442 | rb_snprintf(squitreason, sizeof squitreason, | |
443 | "Invalid UID %s for nick %s on %s/%s", | |
444 | parv[8], parv[1], source_p->name, source_p->id); | |
445 | exit_client(client_p, client_p, client_p, squitreason); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | if(!clean_username(parv[5]) || !clean_host(parv[6])) | |
450 | { | |
451 | ServerStats.is_kill++; | |
452 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
453 | "Bad user@host: %s@%s From: %s(via %s)", | |
454 | parv[5], parv[6], source_p->name, client_p->name); | |
455 | sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name); | |
456 | return 0; | |
457 | } | |
458 | ||
459 | if(strcmp(parv[9], "*") && !clean_host(parv[9])) | |
460 | { | |
461 | ServerStats.is_kill++; | |
462 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
463 | "Bad realhost: %s From: %s(via %s)", | |
464 | parv[9], source_p->name, client_p->name); | |
465 | sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name); | |
466 | return 0; | |
467 | } | |
468 | ||
469 | /* check length of clients gecos */ | |
470 | if(strlen(parv[11]) > REALLEN) | |
471 | { | |
472 | char *s = LOCAL_COPY(parv[11]); | |
473 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s", | |
474 | source_p->name, parv[1]); | |
475 | s[REALLEN] = '\0'; | |
476 | parv[11] = s; | |
477 | } | |
478 | ||
479 | target_p = find_named_client(parv[1]); | |
480 | ||
481 | if(target_p == NULL) | |
482 | { | |
483 | register_client(client_p, source_p, parv[1], newts, parc, parv); | |
484 | } | |
485 | else if(IsUnknown(target_p)) | |
486 | { | |
487 | exit_client(NULL, target_p, &me, "Overridden"); | |
488 | register_client(client_p, source_p, parv[1], newts, parc, parv); | |
489 | } | |
490 | /* we've got a collision! */ | |
491 | else | |
492 | perform_nick_collides(source_p, client_p, target_p, parc, parv, | |
493 | newts, parv[1], parv[8]); | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | /* ms_save() | |
499 | * parv[1] - UID | |
500 | * parv[2] - TS | |
501 | */ | |
502 | static int | |
503 | ms_save(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
504 | { | |
505 | struct Client *target_p; | |
506 | ||
507 | target_p = find_id(parv[1]); | |
508 | if (target_p == NULL) | |
509 | return 0; | |
510 | if (!IsPerson(target_p)) | |
511 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
512 | "Ignored SAVE message for non-person %s from %s", | |
513 | target_p->name, source_p->name); | |
514 | else if (IsDigit(target_p->name[0])) | |
515 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
516 | "Ignored noop SAVE message for %s from %s", | |
517 | target_p->name, source_p->name); | |
518 | else if (target_p->tsinfo == atol(parv[2])) | |
519 | save_user(client_p, source_p, target_p); | |
520 | else | |
521 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
522 | "Ignored SAVE message for %s from %s", | |
523 | target_p->name, source_p->name); | |
524 | return 0; | |
525 | } | |
526 | ||
527 | /* clean_nick() | |
528 | * | |
529 | * input - nickname to check | |
530 | * output - 0 if erroneous, else 1 | |
531 | * side effects - | |
532 | */ | |
533 | static int | |
534 | clean_nick(const char *nick, int loc_client) | |
535 | { | |
536 | int len = 0; | |
537 | ||
538 | /* nicks cant start with a digit or -, and must have a length */ | |
539 | if(*nick == '-' || *nick == '\0') | |
540 | return 0; | |
541 | ||
542 | if(loc_client && IsDigit(*nick)) | |
543 | return 0; | |
544 | ||
545 | for(; *nick; nick++) | |
546 | { | |
547 | len++; | |
548 | if(!IsNickChar(*nick)) | |
549 | return 0; | |
550 | } | |
551 | ||
552 | /* nicklen is +1 */ | |
553 | if(len >= NICKLEN && len >= ConfigFileEntry.nicklen) | |
554 | return 0; | |
555 | ||
556 | return 1; | |
557 | } | |
558 | ||
559 | /* clean_username() | |
560 | * | |
561 | * input - username to check | |
562 | * output - 0 if erroneous, else 0 | |
563 | * side effects - | |
564 | */ | |
565 | static int | |
566 | clean_username(const char *username) | |
567 | { | |
568 | int len = 0; | |
569 | ||
570 | for(; *username; username++) | |
571 | { | |
572 | len++; | |
573 | ||
574 | if(!IsUserChar(*username)) | |
575 | return 0; | |
576 | } | |
577 | ||
578 | if(len > USERLEN) | |
579 | return 0; | |
580 | ||
581 | return 1; | |
582 | } | |
583 | ||
584 | /* clean_host() | |
585 | * | |
586 | * input - host to check | |
587 | * output - 0 if erroneous, else 0 | |
588 | * side effects - | |
589 | */ | |
590 | static int | |
591 | clean_host(const char *host) | |
592 | { | |
593 | int len = 0; | |
594 | ||
595 | for(; *host; host++) | |
596 | { | |
597 | len++; | |
598 | ||
599 | if(!IsHostChar(*host)) | |
600 | return 0; | |
601 | } | |
602 | ||
603 | if(len > HOSTLEN) | |
604 | return 0; | |
605 | ||
606 | return 1; | |
607 | } | |
608 | ||
609 | static int | |
610 | clean_uid(const char *uid, const char *sid) | |
611 | { | |
612 | int len = 1; | |
613 | ||
614 | if(strncmp(uid, sid, strlen(sid))) | |
615 | return 0; | |
616 | ||
617 | if(!IsDigit(*uid++)) | |
618 | return 0; | |
619 | ||
620 | for(; *uid; uid++) | |
621 | { | |
622 | len++; | |
623 | ||
624 | if(!IsIdChar(*uid)) | |
625 | return 0; | |
626 | } | |
627 | ||
628 | if(len != IDLEN - 1) | |
629 | return 0; | |
630 | ||
631 | return 1; | |
632 | } | |
633 | ||
634 | static void | |
635 | set_initial_nick(struct Client *client_p, struct Client *source_p, char *nick) | |
636 | { | |
637 | char buf[USERLEN + 1]; | |
638 | char note[NICKLEN + 10]; | |
639 | ||
640 | /* This had to be copied here to avoid problems.. */ | |
641 | source_p->tsinfo = rb_current_time(); | |
642 | if(source_p->name[0]) | |
643 | del_from_client_hash(source_p->name, source_p); | |
644 | ||
645 | strcpy(source_p->name, nick); | |
646 | add_to_client_hash(nick, source_p); | |
647 | ||
648 | rb_snprintf(note, sizeof(note), "Nick: %s", nick); | |
649 | rb_note(client_p->localClient->F, note); | |
650 | ||
651 | if(source_p->flags & FLAGS_SENTUSER) | |
652 | { | |
653 | rb_strlcpy(buf, source_p->username, sizeof(buf)); | |
654 | ||
655 | /* got user, heres nick. */ | |
656 | register_local_user(client_p, source_p, buf); | |
657 | ||
658 | } | |
659 | } | |
660 | ||
661 | static void | |
662 | change_local_nick(struct Client *client_p, struct Client *source_p, | |
663 | char *nick, int dosend) | |
664 | { | |
665 | struct Client *target_p; | |
666 | rb_dlink_node *ptr, *next_ptr; | |
667 | struct Channel *chptr; | |
668 | char note[NICKLEN + 10]; | |
669 | int samenick; | |
670 | ||
671 | if (dosend) | |
672 | { | |
673 | chptr = find_bannickchange_channel(source_p); | |
674 | if (chptr != NULL) | |
675 | { | |
676 | sendto_one_numeric(source_p, ERR_BANNICKCHANGE, | |
677 | form_str(ERR_BANNICKCHANGE), | |
678 | nick, chptr->chname); | |
679 | return; | |
680 | } | |
681 | if((source_p->localClient->last_nick_change + ConfigFileEntry.max_nick_time) < rb_current_time()) | |
682 | source_p->localClient->number_of_nick_changes = 0; | |
683 | ||
684 | source_p->localClient->last_nick_change = rb_current_time(); | |
685 | source_p->localClient->number_of_nick_changes++; | |
686 | ||
687 | if(ConfigFileEntry.anti_nick_flood && !IsOper(source_p) && | |
688 | source_p->localClient->number_of_nick_changes > ConfigFileEntry.max_nick_changes) | |
689 | { | |
690 | sendto_one(source_p, form_str(ERR_NICKTOOFAST), | |
691 | me.name, source_p->name, source_p->name, | |
692 | nick, ConfigFileEntry.max_nick_time); | |
693 | return; | |
694 | } | |
695 | } | |
696 | ||
697 | samenick = irccmp(source_p->name, nick) ? 0 : 1; | |
698 | ||
699 | /* dont reset TS if theyre just changing case of nick */ | |
700 | if(!samenick) | |
701 | { | |
702 | /* force the TS to increase -- jilles */ | |
703 | if (source_p->tsinfo >= rb_current_time()) | |
704 | source_p->tsinfo++; | |
705 | else | |
706 | source_p->tsinfo = rb_current_time(); | |
707 | monitor_signoff(source_p); | |
708 | /* we only do bancache for local users -- jilles */ | |
709 | if(source_p->user) | |
710 | invalidate_bancache_user(source_p); | |
711 | } | |
712 | ||
713 | sendto_realops_snomask(SNO_NCHANGE, L_ALL, | |
714 | "Nick change: From %s to %s [%s@%s]", | |
715 | source_p->name, nick, source_p->username, source_p->host); | |
716 | ||
717 | /* send the nick change to the users channels */ | |
718 | sendto_common_channels_local(source_p, NOCAPS, ":%s!%s@%s NICK :%s", | |
719 | source_p->name, source_p->username, source_p->host, nick); | |
720 | ||
721 | /* send the nick change to servers.. */ | |
722 | if(source_p->user) | |
723 | { | |
724 | add_history(source_p, 1); | |
725 | ||
726 | if (dosend) | |
727 | { | |
728 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld", | |
729 | use_id(source_p), nick, (long) source_p->tsinfo); | |
730 | } | |
731 | } | |
732 | ||
733 | /* Finally, add to hash */ | |
734 | del_from_client_hash(source_p->name, source_p); | |
735 | strcpy(source_p->name, nick); | |
736 | add_to_client_hash(nick, source_p); | |
737 | ||
738 | if(!samenick) | |
739 | monitor_signon(source_p); | |
740 | ||
741 | /* Make sure everyone that has this client on its accept list | |
742 | * loses that reference. | |
743 | */ | |
744 | /* we used to call del_all_accepts() here, but theres no real reason | |
745 | * to clear a clients own list of accepted clients. So just remove | |
746 | * them from everyone elses list --anfl | |
747 | */ | |
748 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, source_p->on_allow_list.head) | |
749 | { | |
750 | target_p = ptr->data; | |
751 | ||
752 | rb_dlinkFindDestroy(source_p, &target_p->localClient->allow_list); | |
753 | rb_dlinkDestroy(ptr, &source_p->on_allow_list); | |
754 | } | |
755 | ||
756 | rb_snprintf(note, sizeof(note), "Nick: %s", nick); | |
757 | rb_note(client_p->localClient->F, note); | |
758 | ||
759 | return; | |
760 | } | |
761 | ||
762 | /* | |
763 | * change_remote_nick() | |
764 | */ | |
765 | static int | |
766 | change_remote_nick(struct Client *client_p, struct Client *source_p, | |
767 | time_t newts, const char *nick, int dosend) | |
768 | { | |
769 | struct nd_entry *nd; | |
770 | int samenick = irccmp(source_p->name, nick) ? 0 : 1; | |
771 | ||
772 | /* client changing their nick - dont reset ts if its same */ | |
773 | if(!samenick) | |
774 | { | |
775 | source_p->tsinfo = newts ? newts : rb_current_time(); | |
776 | monitor_signoff(source_p); | |
777 | } | |
778 | ||
779 | sendto_common_channels_local(source_p, NOCAPS, ":%s!%s@%s NICK :%s", | |
780 | source_p->name, source_p->username, source_p->host, nick); | |
781 | ||
782 | if(source_p->user) | |
783 | { | |
784 | add_history(source_p, 1); | |
785 | if (dosend) | |
786 | { | |
787 | sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld", | |
788 | use_id(source_p), nick, (long) source_p->tsinfo); | |
789 | } | |
790 | } | |
791 | ||
792 | del_from_client_hash(source_p->name, source_p); | |
793 | ||
794 | /* invalidate nick delay when a remote client uses the nick.. */ | |
795 | if((nd = irc_dictionary_retrieve(nd_dict, nick))) | |
796 | free_nd_entry(nd); | |
797 | ||
798 | strcpy(source_p->name, nick); | |
799 | add_to_client_hash(nick, source_p); | |
800 | ||
801 | if(!samenick) | |
802 | monitor_signon(source_p); | |
803 | ||
804 | /* remove all accepts pointing to the client */ | |
805 | del_all_accepts(source_p); | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | static int | |
811 | perform_nick_collides(struct Client *source_p, struct Client *client_p, | |
812 | struct Client *target_p, int parc, const char *parv[], | |
813 | time_t newts, const char *nick, const char *uid) | |
814 | { | |
815 | int sameuser; | |
816 | int use_save; | |
817 | const char *action; | |
818 | ||
819 | use_save = ConfigFileEntry.collision_fnc && can_save(target_p) && | |
820 | uid != NULL && can_save(source_p); | |
821 | action = use_save ? "saved" : "killed"; | |
822 | ||
823 | /* if we dont have a ts, or their TS's are the same, kill both */ | |
824 | if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) | |
825 | { | |
826 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
827 | "Nick collision on %s(%s <- %s)(both %s)", | |
828 | target_p->name, target_p->from->name, client_p->name, action); | |
829 | ||
830 | if (use_save) | |
831 | { | |
832 | save_user(&me, &me, target_p); | |
833 | ServerStats.is_save++; | |
834 | sendto_one(client_p, ":%s SAVE %s %ld", me.id, | |
835 | uid, (long)newts); | |
836 | register_client(client_p, source_p, | |
837 | uid, SAVE_NICKTS, parc, parv); | |
838 | } | |
839 | else | |
840 | { | |
841 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
842 | form_str(ERR_NICKCOLLISION), target_p->name); | |
843 | ||
844 | /* if the new client being introduced has a UID, we need to | |
845 | * issue a KILL for it.. | |
846 | */ | |
847 | if(uid) | |
848 | sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))", | |
849 | me.id, uid, me.name); | |
850 | ||
851 | /* we then need to KILL the old client everywhere */ | |
852 | kill_client_serv_butone(NULL, target_p, "%s (Nick collision (new))", me.name); | |
853 | ServerStats.is_kill++; | |
854 | ||
855 | target_p->flags |= FLAGS_KILLED; | |
856 | exit_client(client_p, target_p, &me, "Nick collision (new)"); | |
857 | } | |
858 | return 0; | |
859 | } | |
860 | /* the timestamps are different */ | |
861 | else | |
862 | { | |
863 | sameuser = (target_p->user) && !irccmp(target_p->username, parv[5]) | |
864 | && !irccmp(target_p->host, parv[6]); | |
865 | ||
866 | if((sameuser && newts < target_p->tsinfo) || | |
867 | (!sameuser && newts > target_p->tsinfo)) | |
868 | { | |
869 | /* if we have a UID, then we need to issue a KILL, | |
870 | * otherwise we do nothing and hope that the other | |
871 | * client will collide it.. | |
872 | */ | |
873 | if (use_save) | |
874 | { | |
875 | sendto_one(client_p, ":%s SAVE %s %ld", me.id, | |
876 | uid, (long)newts); | |
877 | register_client(client_p, source_p, | |
878 | uid, SAVE_NICKTS, parc, parv); | |
879 | } | |
880 | else if(uid) | |
881 | sendto_one(client_p, | |
882 | ":%s KILL %s :%s (Nick collision (new))", | |
883 | me.id, uid, me.name); | |
884 | return 0; | |
885 | } | |
886 | else | |
887 | { | |
888 | if(sameuser) | |
889 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
890 | "Nick collision on %s(%s <- %s)(older %s)", | |
891 | target_p->name, target_p->from->name, | |
892 | client_p->name, action); | |
893 | else | |
894 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
895 | "Nick collision on %s(%s <- %s)(newer %s)", | |
896 | target_p->name, target_p->from->name, | |
897 | client_p->name, action); | |
898 | ||
899 | if (use_save) | |
900 | { | |
901 | ServerStats.is_save++; | |
902 | save_user(&me, &me, target_p); | |
903 | } | |
904 | else | |
905 | { | |
906 | ServerStats.is_kill++; | |
907 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
908 | form_str(ERR_NICKCOLLISION), target_p->name); | |
909 | ||
910 | /* now we just need to kill the existing client */ | |
911 | kill_client_serv_butone(client_p, target_p, | |
912 | "%s (Nick collision (new))", me.name); | |
913 | ||
914 | target_p->flags |= FLAGS_KILLED; | |
915 | (void) exit_client(client_p, target_p, &me, "Nick collision"); | |
916 | } | |
917 | ||
918 | register_client(client_p, source_p, | |
919 | nick, newts, parc, parv); | |
920 | ||
921 | return 0; | |
922 | } | |
923 | } | |
924 | } | |
925 | ||
926 | ||
927 | static int | |
928 | perform_nickchange_collides(struct Client *source_p, struct Client *client_p, | |
929 | struct Client *target_p, int parc, | |
930 | const char *parv[], time_t newts, const char *nick) | |
931 | { | |
932 | int sameuser; | |
933 | int use_save; | |
934 | const char *action; | |
935 | ||
936 | use_save = ConfigFileEntry.collision_fnc && can_save(target_p) && | |
937 | can_save(source_p); | |
938 | action = use_save ? "saved" : "killed"; | |
939 | ||
940 | /* its a client changing nick and causing a collide */ | |
941 | if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo) || !source_p->user) | |
942 | { | |
943 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
944 | "Nick change collision from %s to %s(%s <- %s)(both %s)", | |
945 | source_p->name, target_p->name, target_p->from->name, | |
946 | client_p->name, action); | |
947 | ||
948 | if (use_save) | |
949 | { | |
950 | ServerStats.is_save += 2; | |
951 | save_user(&me, &me, target_p); | |
952 | sendto_one(client_p, ":%s SAVE %s %ld", me.id, | |
953 | source_p->id, (long)newts); | |
954 | /* don't send a redundant nick change */ | |
955 | if (!IsDigit(source_p->name[0])) | |
956 | change_remote_nick(client_p, source_p, SAVE_NICKTS, source_p->id, 1); | |
957 | } | |
958 | else | |
959 | { | |
960 | ServerStats.is_kill++; | |
961 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
962 | form_str(ERR_NICKCOLLISION), target_p->name); | |
963 | ||
964 | kill_client_serv_butone(NULL, source_p, "%s (Nick change collision)", me.name); | |
965 | ||
966 | ServerStats.is_kill++; | |
967 | ||
968 | kill_client_serv_butone(NULL, target_p, "%s (Nick change collision)", me.name); | |
969 | ||
970 | target_p->flags |= FLAGS_KILLED; | |
971 | exit_client(NULL, target_p, &me, "Nick collision(new)"); | |
972 | source_p->flags |= FLAGS_KILLED; | |
973 | exit_client(client_p, source_p, &me, "Nick collision(old)"); | |
974 | } | |
975 | return 0; | |
976 | } | |
977 | else | |
978 | { | |
979 | sameuser = !irccmp(target_p->username, source_p->username) && | |
980 | !irccmp(target_p->host, source_p->host); | |
981 | ||
982 | if((sameuser && newts < target_p->tsinfo) || | |
983 | (!sameuser && newts > target_p->tsinfo)) | |
984 | { | |
985 | if(sameuser) | |
986 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
987 | "Nick change collision from %s to %s(%s <- %s)(older %s)", | |
988 | source_p->name, target_p->name, | |
989 | target_p->from->name, client_p->name, action); | |
990 | else | |
991 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
992 | "Nick change collision from %s to %s(%s <- %s)(newer %s)", | |
993 | source_p->name, target_p->name, | |
994 | target_p->from->name, client_p->name, action); | |
995 | ||
996 | if (use_save) | |
997 | { | |
998 | ServerStats.is_save++; | |
999 | /* can't broadcast a SAVE because the | |
1000 | * nickchange has happened at client_p | |
1001 | * but not in other directions -- jilles */ | |
1002 | sendto_one(client_p, ":%s SAVE %s %ld", me.id, | |
1003 | source_p->id, (long)newts); | |
1004 | /* send a :<id> NICK <id> <ts> (!) */ | |
1005 | if (!IsDigit(source_p->name[0])) | |
1006 | change_remote_nick(client_p, source_p, SAVE_NICKTS, source_p->id, 1); | |
1007 | } | |
1008 | else | |
1009 | { | |
1010 | ServerStats.is_kill++; | |
1011 | ||
1012 | sendto_one_numeric(source_p, ERR_NICKCOLLISION, | |
1013 | form_str(ERR_NICKCOLLISION), source_p->name); | |
1014 | ||
1015 | /* kill the client issuing the nickchange */ | |
1016 | kill_client_serv_butone(client_p, source_p, | |
1017 | "%s (Nick change collision)", me.name); | |
1018 | ||
1019 | source_p->flags |= FLAGS_KILLED; | |
1020 | ||
1021 | if(sameuser) | |
1022 | exit_client(client_p, source_p, &me, "Nick collision(old)"); | |
1023 | else | |
1024 | exit_client(client_p, source_p, &me, "Nick collision(new)"); | |
1025 | } | |
1026 | return 0; | |
1027 | } | |
1028 | else | |
1029 | { | |
1030 | if(sameuser) | |
1031 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
1032 | "Nick collision on %s(%s <- %s)(older %s)", | |
1033 | target_p->name, target_p->from->name, | |
1034 | client_p->name, action); | |
1035 | else | |
1036 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
1037 | "Nick collision on %s(%s <- %s)(newer %s)", | |
1038 | target_p->name, target_p->from->name, | |
1039 | client_p->name, action); | |
1040 | ||
1041 | if (use_save) | |
1042 | { | |
1043 | ServerStats.is_save++; | |
1044 | save_user(&me, &me, target_p); | |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | sendto_one_numeric(target_p, ERR_NICKCOLLISION, | |
1049 | form_str(ERR_NICKCOLLISION), target_p->name); | |
1050 | ||
1051 | /* kill the client who existed before hand */ | |
1052 | kill_client_serv_butone(client_p, target_p, "%s (Nick collision)", me.name); | |
1053 | ||
1054 | ServerStats.is_kill++; | |
1055 | ||
1056 | target_p->flags |= FLAGS_KILLED; | |
1057 | (void) exit_client(client_p, target_p, &me, "Nick collision"); | |
1058 | } | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | change_remote_nick(client_p, source_p, newts, nick, 1); | |
1063 | ||
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int | |
1068 | register_client(struct Client *client_p, struct Client *server, | |
1069 | const char *nick, time_t newts, int parc, const char *parv[]) | |
1070 | { | |
1071 | struct Client *source_p; | |
1072 | struct User *user; | |
1073 | struct nd_entry *nd; | |
1074 | const char *m; | |
1075 | int flag; | |
1076 | ||
1077 | source_p = make_client(client_p); | |
1078 | user = make_user(source_p); | |
1079 | rb_dlinkAddTail(source_p, &source_p->node, &global_client_list); | |
1080 | ||
1081 | source_p->hopcount = atoi(parv[2]); | |
1082 | source_p->tsinfo = newts; | |
1083 | ||
1084 | strcpy(source_p->name, nick); | |
1085 | rb_strlcpy(source_p->username, parv[5], sizeof(source_p->username)); | |
1086 | rb_strlcpy(source_p->host, parv[6], sizeof(source_p->host)); | |
1087 | rb_strlcpy(source_p->orighost, source_p->host, sizeof(source_p->orighost)); | |
1088 | ||
1089 | if(parc == 12) | |
1090 | { | |
1091 | rb_strlcpy(source_p->info, parv[11], sizeof(source_p->info)); | |
1092 | rb_strlcpy(source_p->sockhost, parv[7], sizeof(source_p->sockhost)); | |
1093 | rb_strlcpy(source_p->id, parv[8], sizeof(source_p->id)); | |
1094 | add_to_id_hash(source_p->id, source_p); | |
1095 | if (strcmp(parv[9], "*")) | |
1096 | { | |
1097 | rb_strlcpy(source_p->orighost, parv[9], sizeof(source_p->orighost)); | |
1098 | if (irccmp(source_p->host, source_p->orighost)) | |
1099 | SetDynSpoof(source_p); | |
1100 | } | |
1101 | if (strcmp(parv[10], "*")) | |
1102 | rb_strlcpy(source_p->user->suser, parv[10], sizeof(source_p->user->suser)); | |
1103 | } | |
1104 | else if(parc == 10) | |
1105 | { | |
1106 | rb_strlcpy(source_p->info, parv[9], sizeof(source_p->info)); | |
1107 | rb_strlcpy(source_p->sockhost, parv[7], sizeof(source_p->sockhost)); | |
1108 | rb_strlcpy(source_p->id, parv[8], sizeof(source_p->id)); | |
1109 | add_to_id_hash(source_p->id, source_p); | |
1110 | } | |
1111 | else | |
1112 | { | |
1113 | s_assert(0); | |
1114 | } | |
1115 | ||
1116 | /* remove any nd entries for this nick */ | |
1117 | if((nd = irc_dictionary_retrieve(nd_dict, nick))) | |
1118 | free_nd_entry(nd); | |
1119 | ||
1120 | add_to_client_hash(nick, source_p); | |
1121 | add_to_hostname_hash(source_p->orighost, source_p); | |
1122 | monitor_signon(source_p); | |
1123 | ||
1124 | m = &parv[4][1]; | |
1125 | while(*m) | |
1126 | { | |
1127 | flag = user_modes[(unsigned char) *m]; | |
1128 | ||
1129 | if(flag & UMODE_SERVICE) | |
1130 | { | |
1131 | int hit = 0; | |
1132 | rb_dlink_node *ptr; | |
1133 | ||
1134 | RB_DLINK_FOREACH(ptr, service_list.head) | |
1135 | { | |
1136 | if(!irccmp((const char *) ptr->data, server->name)) | |
1137 | { | |
1138 | hit++; | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | if(!hit) | |
1144 | { | |
1145 | m++; | |
1146 | continue; | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | /* increment +i count if theyre invis */ | |
1151 | if(!(source_p->umodes & UMODE_INVISIBLE) && (flag & UMODE_INVISIBLE)) | |
1152 | Count.invisi++; | |
1153 | ||
1154 | /* increment opered count if theyre opered */ | |
1155 | if(!(source_p->umodes & UMODE_OPER) && (flag & UMODE_OPER)) | |
1156 | Count.oper++; | |
1157 | ||
1158 | source_p->umodes |= flag; | |
1159 | m++; | |
1160 | } | |
1161 | ||
1162 | if(IsOper(source_p) && !IsService(source_p)) | |
1163 | rb_dlinkAddAlloc(source_p, &oper_list); | |
1164 | ||
1165 | SetRemoteClient(source_p); | |
1166 | ||
1167 | if(++Count.total > Count.max_tot) | |
1168 | Count.max_tot = Count.total; | |
1169 | ||
1170 | source_p->servptr = server; | |
1171 | ||
1172 | rb_dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users); | |
1173 | ||
1174 | call_hook(h_new_remote_user, source_p); | |
1175 | ||
1176 | return (introduce_client(client_p, source_p, user, nick, parc == 12)); | |
1177 | } | |
1178 | ||
1179 | /* Check if we can do SAVE. target_p can be a client to save or a | |
1180 | * server introducing a client -- jilles */ | |
1181 | static int | |
1182 | can_save(struct Client *target_p) | |
1183 | { | |
1184 | struct Client *serv_p; | |
1185 | ||
1186 | if (MyClient(target_p)) | |
1187 | return 1; | |
1188 | if (!has_id(target_p)) | |
1189 | return 0; | |
1190 | serv_p = IsServer(target_p) ? target_p : target_p->servptr; | |
1191 | while (serv_p != NULL && serv_p != &me) | |
1192 | { | |
1193 | if (!(serv_p->serv->caps & CAP_SAVE)) | |
1194 | return 0; | |
1195 | serv_p = serv_p->servptr; | |
1196 | } | |
1197 | return serv_p == &me; | |
1198 | } | |
1199 | ||
1200 | static void | |
1201 | save_user(struct Client *client_p, struct Client *source_p, | |
1202 | struct Client *target_p) | |
1203 | { | |
1204 | if (!MyConnect(target_p) && (!has_id(target_p) || !IsCapable(target_p->from, CAP_SAVE))) | |
1205 | { | |
1206 | /* This shouldn't happen */ | |
1207 | /* Note we only need SAVE support in this direction */ | |
1208 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
1209 | "Killed %s!%s@%s for nick collision detected by %s (%s does not support SAVE)", | |
1210 | target_p->name, target_p->username, target_p->host, source_p->name, target_p->from->name); | |
1211 | kill_client_serv_butone(NULL, target_p, "%s (Nick collision (no SAVE support))", me.name); | |
1212 | ServerStats.is_kill++; | |
1213 | ||
1214 | target_p->flags |= FLAGS_KILLED; | |
1215 | (void) exit_client(NULL, target_p, &me, "Nick collision (no SAVE support)"); | |
1216 | return; | |
1217 | } | |
1218 | sendto_server(client_p, NULL, CAP_SAVE|CAP_TS6, NOCAPS, ":%s SAVE %s %ld", | |
1219 | source_p->id, target_p->id, (long)target_p->tsinfo); | |
1220 | sendto_server(client_p, NULL, CAP_TS6, CAP_SAVE, ":%s NICK %s :%ld", | |
1221 | target_p->id, target_p->id, (long)SAVE_NICKTS); | |
1222 | if (!IsMe(client_p)) | |
1223 | sendto_realops_snomask(SNO_SKILL, L_ALL, | |
1224 | "Received SAVE message for %s from %s", | |
1225 | target_p->name, source_p->name); | |
1226 | if (MyClient(target_p)) | |
1227 | { | |
1228 | sendto_one_numeric(target_p, RPL_SAVENICK, | |
1229 | form_str(RPL_SAVENICK), target_p->id); | |
1230 | change_local_nick(target_p, target_p, target_p->id, 0); | |
1231 | target_p->tsinfo = SAVE_NICKTS; | |
1232 | } | |
1233 | else | |
1234 | change_remote_nick(target_p, target_p, SAVE_NICKTS, target_p->id, 0); | |
1235 | } | |
1236 | ||
1237 | static void bad_nickname(struct Client *client_p, const char *nick) | |
1238 | { | |
1239 | char squitreason[100]; | |
1240 | ||
1241 | sendto_wallops_flags(UMODE_WALLOP, &me, | |
1242 | "Squitting %s because of bad nickname %s (NICKLEN mismatch?)", | |
1243 | client_p->name, nick); | |
1244 | sendto_server(NULL, NULL, CAP_TS6, NOCAPS, | |
1245 | ":%s WALLOPS :Squitting %s because of bad nickname %s (NICKLEN mismatch?)", | |
1246 | me.id, client_p->name, nick); | |
1247 | ilog(L_SERVER, "Link %s cancelled, bad nickname %s sent (NICKLEN mismatch?)", | |
1248 | client_p->name, nick); | |
1249 | ||
1250 | rb_snprintf(squitreason, sizeof squitreason, | |
1251 | "Bad nickname introduced [%s]", nick); | |
1252 | exit_client(client_p, client_p, &me, squitreason); | |
1253 | } |