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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_kline.c: Bans/unbans a user. | |
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_kline.c 3466 2007-05-19 23:36:51Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "tools.h" | |
29 | #include "channel.h" | |
30 | #include "class.h" | |
31 | #include "client.h" | |
32 | #include "common.h" | |
33 | #include "irc_string.h" | |
34 | #include "sprintf_irc.h" | |
35 | #include "ircd.h" | |
36 | #include "hostmask.h" | |
37 | #include "numeric.h" | |
38 | #include "commio.h" | |
39 | #include "s_conf.h" | |
40 | #include "s_newconf.h" | |
41 | #include "s_log.h" | |
42 | #include "send.h" | |
43 | #include "hash.h" | |
44 | #include "s_serv.h" | |
45 | #include "msg.h" | |
46 | #include "parse.h" | |
47 | #include "modules.h" | |
48 | #include "event.h" | |
49 | #include "reject.h" | |
50 | ||
51 | static int mo_kline(struct Client *, struct Client *, int, const char **); | |
52 | static int ms_kline(struct Client *, struct Client *, int, const char **); | |
53 | static int me_kline(struct Client *, struct Client *, int, const char **); | |
54 | static int mo_unkline(struct Client *, struct Client *, int, const char **); | |
55 | static int ms_unkline(struct Client *, struct Client *, int, const char **); | |
56 | static int me_unkline(struct Client *, struct Client *, int, const char **); | |
57 | ||
58 | struct Message kline_msgtab = { | |
59 | "KLINE", 0, 0, 0, MFLG_SLOW, | |
60 | {mg_unreg, mg_not_oper, {ms_kline, 5}, {ms_kline, 5}, {me_kline, 5}, {mo_kline, 3}} | |
61 | }; | |
62 | ||
63 | struct Message unkline_msgtab = { | |
64 | "UNKLINE", 0, 0, 0, MFLG_SLOW, | |
65 | {mg_unreg, mg_not_oper, {ms_unkline, 4}, {ms_unkline, 4}, {me_unkline, 3}, {mo_unkline, 2}} | |
66 | }; | |
67 | ||
68 | mapi_clist_av1 kline_clist[] = { &kline_msgtab, &unkline_msgtab, NULL }; | |
69 | DECLARE_MODULE_AV1(kline, NULL, NULL, kline_clist, NULL, NULL, "$Revision: 3466 $"); | |
70 | ||
71 | /* Local function prototypes */ | |
72 | static int find_user_host(struct Client *source_p, const char *userhost, char *user, char *host); | |
73 | static int valid_comment(struct Client *source_p, char *comment); | |
74 | static int valid_user_host(struct Client *source_p, const char *user, const char *host); | |
75 | static int valid_wild_card(struct Client *source_p, const char *user, const char *host); | |
76 | ||
77 | static void handle_remote_kline(struct Client *source_p, int tkline_time, | |
78 | const char *user, const char *host, const char *reason); | |
79 | static void apply_kline(struct Client *source_p, struct ConfItem *aconf, | |
80 | const char *reason, const char *oper_reason, const char *current_date); | |
81 | static void apply_tkline(struct Client *source_p, struct ConfItem *aconf, | |
82 | const char *, const char *, const char *, int); | |
83 | static int already_placed_kline(struct Client *, const char *, const char *, int); | |
84 | ||
85 | static void handle_remote_unkline(struct Client *source_p, | |
86 | const char *user, const char *host); | |
87 | static void remove_permkline_match(struct Client *, struct ConfItem *); | |
88 | static int flush_write(struct Client *, FILE *, const char *, const char *); | |
89 | static int remove_temp_kline(struct ConfItem *); | |
90 | ||
91 | /* mo_kline() | |
92 | * | |
93 | * parv[1] - temp time or user@host | |
94 | * parv[2] - user@host, "ON", or reason | |
95 | * parv[3] - "ON", reason, or server to target | |
96 | * parv[4] - server to target, or reason | |
97 | * parv[5] - reason | |
98 | */ | |
99 | static int | |
100 | mo_kline(struct Client *client_p, struct Client *source_p, | |
101 | int parc, const char **parv) | |
102 | { | |
103 | char def[] = "No Reason"; | |
104 | char user[USERLEN + 2]; | |
105 | char host[HOSTLEN + 2]; | |
106 | char buffer[IRCD_BUFSIZE]; | |
107 | char *reason = def; | |
108 | char *oper_reason; | |
109 | const char *current_date; | |
110 | const char *target_server = NULL; | |
111 | struct ConfItem *aconf; | |
112 | int tkline_time = 0; | |
113 | int loc = 1; | |
114 | ||
115 | if(!IsOperK(source_p)) | |
116 | { | |
117 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
118 | me.name, source_p->name, "kline"); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | if((tkline_time = valid_temp_time(parv[loc])) >= 0) | |
123 | loc++; | |
124 | /* we just set tkline_time to -1! */ | |
125 | else | |
126 | tkline_time = 0; | |
127 | ||
128 | if(find_user_host(source_p, parv[loc], user, host) == 0) | |
129 | return 0; | |
130 | ||
131 | loc++; | |
132 | ||
133 | if(parc >= loc+2 && !irccmp(parv[loc], "ON")) | |
134 | { | |
135 | if(!IsOperRemoteBan(source_p)) | |
136 | { | |
137 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
138 | me.name, source_p->name, "remoteban"); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | target_server = parv[loc+1]; | |
143 | loc += 2; | |
144 | } | |
145 | ||
146 | if(parc <= loc || EmptyString(parv[loc])) | |
147 | { | |
148 | sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), | |
149 | me.name, source_p->name, "KLINE"); | |
150 | return 0; | |
151 | } | |
152 | ||
153 | reason = LOCAL_COPY(parv[loc]); | |
154 | ||
155 | if(target_server != NULL) | |
156 | { | |
157 | propagate_generic(source_p, "KLINE", target_server, CAP_KLN, | |
158 | "%d %s %s :%s", | |
159 | tkline_time, user, host, reason); | |
160 | ||
161 | /* If we are sending it somewhere that doesnt include us, stop */ | |
162 | if(!match(target_server, me.name)) | |
163 | return 0; | |
164 | } | |
165 | /* if we have cluster servers, send it to them.. */ | |
166 | else if(dlink_list_length(&cluster_conf_list) > 0) | |
167 | cluster_generic(source_p, "KLINE", | |
168 | (tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE, CAP_KLN, | |
169 | "%lu %s %s :%s", | |
170 | tkline_time, user, host, reason); | |
171 | ||
172 | if(!valid_user_host(source_p, user, host) || | |
173 | !valid_wild_card(source_p, user, host) || | |
174 | !valid_comment(source_p, reason)) | |
175 | return 0; | |
176 | ||
177 | if(already_placed_kline(source_p, user, host, tkline_time)) | |
178 | return 0; | |
179 | ||
180 | set_time(); | |
181 | current_date = smalldate(); | |
182 | aconf = make_conf(); | |
183 | aconf->status = CONF_KILL; | |
184 | DupString(aconf->host, host); | |
185 | DupString(aconf->user, user); | |
186 | aconf->port = 0; | |
187 | ||
188 | /* Look for an oper reason */ | |
189 | if((oper_reason = strchr(reason, '|')) != NULL) | |
190 | { | |
191 | *oper_reason = '\0'; | |
192 | oper_reason++; | |
193 | ||
194 | if(!EmptyString(oper_reason)) | |
195 | DupString(aconf->spasswd, oper_reason); | |
196 | } | |
197 | ||
198 | if(tkline_time > 0) | |
199 | { | |
200 | ircsnprintf(buffer, sizeof(buffer), | |
201 | "Temporary K-line %d min. - %s (%s)", | |
202 | (int) (tkline_time / 60), reason, current_date); | |
203 | DupString(aconf->passwd, buffer); | |
204 | apply_tkline(source_p, aconf, reason, oper_reason, current_date, tkline_time); | |
205 | } | |
206 | else | |
207 | { | |
208 | ircsnprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date); | |
209 | DupString(aconf->passwd, buffer); | |
210 | apply_kline(source_p, aconf, reason, oper_reason, current_date); | |
211 | } | |
212 | ||
213 | if(ConfigFileEntry.kline_delay) | |
214 | { | |
215 | if(kline_queued == 0) | |
216 | { | |
217 | eventAddOnce("check_klines", check_klines_event, NULL, | |
218 | ConfigFileEntry.kline_delay); | |
219 | kline_queued = 1; | |
220 | } | |
221 | } | |
222 | else | |
223 | check_klines(); | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
228 | /* ms_kline() | |
229 | * | |
230 | * parv[1] - server targeted at | |
231 | * parv[2] - tkline time (0 if perm) | |
232 | * parv[3] - user | |
233 | * parv[4] - host | |
234 | * parv[5] - reason | |
235 | */ | |
236 | static int | |
237 | ms_kline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
238 | { | |
239 | int tkline_time = atoi(parv[2]); | |
240 | ||
241 | /* 1.5-3 and earlier contains a bug that allows remote klines to be | |
242 | * sent with an empty reason field. This is a protocol violation, | |
243 | * but its not worth dropping the link over.. --anfl | |
244 | */ | |
245 | if(parc < 6 || EmptyString(parv[5])) | |
246 | return 0; | |
247 | ||
248 | propagate_generic(source_p, "KLINE", parv[1], CAP_KLN, | |
249 | "%d %s %s :%s", | |
250 | tkline_time, parv[3], parv[4], parv[5]); | |
251 | ||
252 | if(!match(parv[1], me.name)) | |
253 | return 0; | |
254 | ||
255 | if(!IsPerson(source_p)) | |
256 | return 0; | |
257 | ||
258 | handle_remote_kline(source_p, tkline_time, parv[3], parv[4], parv[5]); | |
259 | return 0; | |
260 | } | |
261 | ||
262 | static int | |
263 | me_kline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
264 | { | |
265 | /* <tkline_time> <user> <host> :<reason> */ | |
266 | if(!IsPerson(source_p)) | |
267 | return 0; | |
268 | ||
269 | handle_remote_kline(source_p, atoi(parv[1]), parv[2], parv[3], parv[4]); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static void | |
274 | handle_remote_kline(struct Client *source_p, int tkline_time, | |
275 | const char *user, const char *host, const char *kreason) | |
276 | { | |
277 | char buffer[BUFSIZE]; | |
278 | const char *current_date; | |
279 | char *reason = LOCAL_COPY(kreason); | |
280 | struct ConfItem *aconf = NULL; | |
281 | char *oper_reason; | |
282 | ||
283 | if(!find_shared_conf(source_p->username, source_p->host, | |
284 | source_p->servptr->name, | |
285 | (tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE)) | |
286 | return; | |
287 | ||
288 | if(!valid_user_host(source_p, user, host) || | |
289 | !valid_wild_card(source_p, user, host) || | |
290 | !valid_comment(source_p, reason)) | |
291 | return; | |
292 | ||
293 | if(already_placed_kline(source_p, user, host, tkline_time)) | |
294 | return; | |
295 | ||
296 | aconf = make_conf(); | |
297 | ||
298 | aconf->status = CONF_KILL; | |
299 | DupString(aconf->user, user); | |
300 | DupString(aconf->host, host); | |
301 | ||
302 | /* Look for an oper reason */ | |
303 | if((oper_reason = strchr(reason, '|')) != NULL) | |
304 | { | |
305 | *oper_reason = '\0'; | |
306 | oper_reason++; | |
307 | ||
308 | if(!EmptyString(oper_reason)) | |
309 | DupString(aconf->spasswd, oper_reason); | |
310 | } | |
311 | ||
312 | current_date = smalldate(); | |
313 | ||
314 | if(tkline_time > 0) | |
315 | { | |
316 | ircsnprintf(buffer, sizeof(buffer), | |
317 | "Temporary K-line %d min. - %s (%s)", | |
318 | (int) (tkline_time / 60), reason, current_date); | |
319 | DupString(aconf->passwd, buffer); | |
320 | apply_tkline(source_p, aconf, reason, oper_reason, current_date, tkline_time); | |
321 | } | |
322 | else | |
323 | { | |
324 | ircsnprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date); | |
325 | DupString(aconf->passwd, buffer); | |
326 | apply_kline(source_p, aconf, reason, oper_reason, current_date); | |
327 | } | |
328 | ||
329 | if(ConfigFileEntry.kline_delay) | |
330 | { | |
331 | if(kline_queued == 0) | |
332 | { | |
333 | eventAddOnce("check_klines", check_klines_event, NULL, | |
334 | ConfigFileEntry.kline_delay); | |
335 | kline_queued = 1; | |
336 | } | |
337 | } | |
338 | else | |
339 | check_klines(); | |
340 | ||
341 | return; | |
342 | } | |
343 | ||
344 | /* mo_unkline() | |
345 | * | |
346 | * parv[1] - kline to remove | |
347 | * parv[2] - optional "ON" | |
348 | * parv[3] - optional target server | |
349 | */ | |
350 | static int | |
351 | mo_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
352 | { | |
353 | const char *user; | |
354 | char *host; | |
355 | char splat[] = "*"; | |
356 | char *h = LOCAL_COPY(parv[1]); | |
357 | struct ConfItem *aconf; | |
358 | ||
359 | if(!IsOperUnkline(source_p)) | |
360 | { | |
361 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
362 | me.name, source_p->name, "unkline"); | |
363 | return 0; | |
364 | } | |
365 | ||
366 | if((host = strchr(h, '@')) || *h == '*' || strchr(h, '.') || strchr(h, ':')) | |
367 | { | |
368 | /* Explicit user@host mask given */ | |
369 | ||
370 | if(host) /* Found user@host */ | |
371 | { | |
372 | *host++ = '\0'; | |
373 | ||
374 | /* check for @host */ | |
375 | if(*h) | |
376 | user = h; | |
377 | else | |
378 | user = splat; | |
379 | ||
380 | /* check for user@ */ | |
381 | if(!*host) | |
382 | host = splat; | |
383 | } | |
384 | else | |
385 | { | |
386 | user = splat; /* no @ found, assume its *@somehost */ | |
387 | host = h; | |
388 | } | |
389 | } | |
390 | else | |
391 | { | |
392 | sendto_one_notice(source_p, ":Invalid parameters"); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | /* possible remote kline.. */ | |
397 | if((parc > 3) && (irccmp(parv[2], "ON") == 0)) | |
398 | { | |
399 | if(!IsOperRemoteBan(source_p)) | |
400 | { | |
401 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
402 | me.name, source_p->name, "remoteban"); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | propagate_generic(source_p, "UNKLINE", parv[3], CAP_UNKLN, | |
407 | "%s %s", user, host); | |
408 | ||
409 | if(match(parv[3], me.name) == 0) | |
410 | return 0; | |
411 | } | |
412 | else if(dlink_list_length(&cluster_conf_list) > 0) | |
413 | cluster_generic(source_p, "UNKLINE", SHARED_UNKLINE, CAP_UNKLN, | |
414 | "%s %s", user, host); | |
415 | ||
416 | aconf = find_exact_conf_by_address(host, CONF_KILL, user); | |
417 | if(aconf == NULL) | |
418 | { | |
419 | sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | if(remove_temp_kline(aconf)) | |
424 | { | |
425 | sendto_one_notice(source_p, ":Un-klined [%s@%s] from temporary k-lines", user, host); | |
426 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
427 | "%s has removed the temporary K-Line for: [%s@%s]", | |
428 | get_oper_name(source_p), user, host); | |
429 | ilog(L_KLINE, "UK %s %s %s", | |
430 | get_oper_name(source_p), user, host); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | remove_permkline_match(source_p, aconf); | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | /* ms_unkline() | |
440 | * | |
441 | * parv[1] - target server | |
442 | * parv[2] - user to unkline | |
443 | * parv[3] - host to unkline | |
444 | */ | |
445 | static int | |
446 | ms_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
447 | { | |
448 | /* parv[0] parv[1] parv[2] parv[3] | |
449 | * oper target server user host */ | |
450 | propagate_generic(source_p, "UNKLINE", parv[1], CAP_UNKLN, | |
451 | "%s %s", parv[2], parv[3]); | |
452 | ||
453 | if(!match(parv[1], me.name)) | |
454 | return 0; | |
455 | ||
456 | if(!IsPerson(source_p)) | |
457 | return 0; | |
458 | ||
459 | handle_remote_unkline(source_p, parv[2], parv[3]); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static int | |
464 | me_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
465 | { | |
466 | /* user host */ | |
467 | if(!IsPerson(source_p)) | |
468 | return 0; | |
469 | ||
470 | handle_remote_unkline(source_p, parv[1], parv[2]); | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static void | |
475 | handle_remote_unkline(struct Client *source_p, const char *user, const char *host) | |
476 | { | |
477 | struct ConfItem *aconf; | |
478 | ||
479 | if(!find_shared_conf(source_p->username, source_p->host, | |
480 | source_p->servptr->name, SHARED_UNKLINE)) | |
481 | return; | |
482 | ||
483 | aconf = find_exact_conf_by_address(host, CONF_KILL, user); | |
484 | if(aconf == NULL) | |
485 | { | |
486 | sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host); | |
487 | return; | |
488 | } | |
489 | ||
490 | if(remove_temp_kline(aconf)) | |
491 | { | |
492 | sendto_one_notice(source_p, | |
493 | ":Un-klined [%s@%s] from temporary k-lines", | |
494 | user, host); | |
495 | ||
496 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
497 | "%s has removed the temporary K-Line for: [%s@%s]", | |
498 | get_oper_name(source_p), user, host); | |
499 | ||
500 | ilog(L_KLINE, "UK %s %s %s", | |
501 | get_oper_name(source_p), user, host); | |
502 | return; | |
503 | } | |
504 | ||
505 | remove_permkline_match(source_p, aconf); | |
506 | } | |
507 | ||
508 | /* apply_kline() | |
509 | * | |
510 | * inputs - | |
511 | * output - NONE | |
512 | * side effects - kline as given, is added to the hashtable | |
513 | * and conf file | |
514 | */ | |
515 | static void | |
516 | apply_kline(struct Client *source_p, struct ConfItem *aconf, | |
517 | const char *reason, const char *oper_reason, const char *current_date) | |
518 | { | |
519 | add_conf_by_address(aconf->host, CONF_KILL, aconf->user, aconf); | |
520 | write_confitem(KLINE_TYPE, source_p, aconf->user, aconf->host, | |
521 | reason, oper_reason, current_date, 0); | |
522 | } | |
523 | ||
524 | /* apply_tkline() | |
525 | * | |
526 | * inputs - | |
527 | * output - NONE | |
528 | * side effects - tkline as given is placed | |
529 | */ | |
530 | static void | |
531 | apply_tkline(struct Client *source_p, struct ConfItem *aconf, | |
532 | const char *reason, const char *oper_reason, const char *current_date, int tkline_time) | |
533 | { | |
534 | aconf->hold = CurrentTime + tkline_time; | |
535 | add_temp_kline(aconf); | |
536 | ||
537 | /* no oper reason.. */ | |
538 | if(EmptyString(oper_reason)) | |
539 | { | |
540 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
541 | "%s added temporary %d min. K-Line for [%s@%s] [%s]", | |
542 | get_oper_name(source_p), tkline_time / 60, | |
543 | aconf->user, aconf->host, reason); | |
544 | ilog(L_KLINE, "K %s %d %s %s %s", | |
545 | get_oper_name(source_p), tkline_time / 60, | |
546 | aconf->user, aconf->host, reason); | |
547 | } | |
548 | else | |
549 | { | |
550 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
551 | "%s added temporary %d min. K-Line for [%s@%s] [%s|%s]", | |
552 | get_oper_name(source_p), tkline_time / 60, | |
553 | aconf->user, aconf->host, reason, oper_reason); | |
554 | ilog(L_KLINE, "K %s %d %s %s %s|%s", | |
555 | get_oper_name(source_p), tkline_time / 60, | |
556 | aconf->user, aconf->host, reason, oper_reason); | |
557 | } | |
558 | ||
559 | sendto_one_notice(source_p, ":Added temporary %d min. K-Line [%s@%s]", | |
560 | tkline_time / 60, aconf->user, aconf->host); | |
561 | } | |
562 | ||
563 | /* find_user_host() | |
564 | * | |
565 | * inputs - client placing kline, user@host, user buffer, host buffer | |
566 | * output - 0 if not ok to kline, 1 to kline i.e. if valid user host | |
567 | * side effects - | |
568 | */ | |
569 | static int | |
570 | find_user_host(struct Client *source_p, const char *userhost, char *luser, char *lhost) | |
571 | { | |
572 | char *hostp; | |
573 | ||
574 | hostp = strchr(userhost, '@'); | |
575 | ||
576 | if(hostp != NULL) /* I'm a little user@host */ | |
577 | { | |
578 | *(hostp++) = '\0'; /* short and squat */ | |
579 | if(*userhost) | |
580 | strlcpy(luser, userhost, USERLEN + 1); /* here is my user */ | |
581 | else | |
582 | strcpy(luser, "*"); | |
583 | if(*hostp) | |
584 | strlcpy(lhost, hostp, HOSTLEN + 1); /* here is my host */ | |
585 | else | |
586 | strcpy(lhost, "*"); | |
587 | } | |
588 | else | |
589 | { | |
590 | /* no '@', no '.', so its not a user@host or host, therefore | |
591 | * its a nick, which support was removed for. | |
592 | */ | |
593 | if(strchr(userhost, '.') == NULL && strchr(userhost, ':') == NULL) | |
594 | return 0; | |
595 | ||
596 | luser[0] = '*'; /* no @ found, assume its *@somehost */ | |
597 | luser[1] = '\0'; | |
598 | strlcpy(lhost, userhost, HOSTLEN + 1); | |
599 | } | |
600 | ||
601 | return 1; | |
602 | } | |
603 | ||
604 | /* valid_user_host() | |
605 | * | |
606 | * inputs - user buffer, host buffer | |
607 | * output - 0 if invalid, 1 if valid | |
608 | * side effects - | |
609 | */ | |
610 | static int | |
611 | valid_user_host(struct Client *source_p, const char *luser, const char *lhost) | |
612 | { | |
613 | /* # is invalid, as is '!' (n!u@h kline) */ | |
614 | if(strchr(lhost, '#') || strchr(luser, '#') || strchr(luser, '!')) | |
615 | { | |
616 | sendto_one_notice(source_p, ":Invalid K-Line"); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | return 1; | |
621 | } | |
622 | ||
623 | /* valid_wild_card() | |
624 | * | |
625 | * input - user buffer, host buffer | |
626 | * output - 0 if invalid, 1 if valid | |
627 | * side effects - | |
628 | */ | |
629 | static int | |
630 | valid_wild_card(struct Client *source_p, const char *luser, const char *lhost) | |
631 | { | |
632 | const char *p; | |
633 | char tmpch; | |
634 | int nonwild = 0; | |
635 | int bitlen; | |
636 | ||
637 | /* user has no wildcards, always accept -- jilles */ | |
638 | if (!strchr(luser, '?') && !strchr(luser, '*')) | |
639 | return 1; | |
640 | ||
641 | /* check there are enough non wildcard chars */ | |
642 | p = luser; | |
643 | while ((tmpch = *p++)) | |
644 | { | |
645 | if(!IsKWildChar(tmpch)) | |
646 | { | |
647 | /* found enough chars, return */ | |
648 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
649 | return 1; | |
650 | } | |
651 | } | |
652 | ||
653 | /* try host, as user didnt contain enough */ | |
654 | /* special case for cidr masks -- jilles */ | |
655 | if ((p = strrchr(lhost, '/')) != NULL && IsDigit(p[1])) | |
656 | { | |
657 | bitlen = atoi(p + 1); | |
658 | /* much like non-cidr for ipv6, rather arbitrary for ipv4 */ | |
659 | if (bitlen > 0 && bitlen >= (strchr(lhost, ':') ? 4 * (ConfigFileEntry.min_nonwildcard - nonwild) : 6 - 2 * nonwild)) | |
660 | return 1; | |
661 | } | |
662 | else | |
663 | { | |
664 | p = lhost; | |
665 | while ((tmpch = *p++)) | |
666 | { | |
667 | if(!IsKWildChar(tmpch)) | |
668 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
669 | return 1; | |
670 | } | |
671 | } | |
672 | ||
673 | sendto_one_notice(source_p, | |
674 | ":Please include at least %d non-wildcard " | |
675 | "characters with the user@host", | |
676 | ConfigFileEntry.min_nonwildcard); | |
677 | return 0; | |
678 | } | |
679 | ||
680 | /* | |
681 | * valid_comment | |
682 | * inputs - pointer to client | |
683 | * - pointer to comment | |
684 | * output - 0 if no valid comment, 1 if valid | |
685 | * side effects - NONE | |
686 | */ | |
687 | static int | |
688 | valid_comment(struct Client *source_p, char *comment) | |
689 | { | |
690 | if(strchr(comment, '"')) | |
691 | { | |
692 | sendto_one_notice(source_p, ":Invalid character '\"' in comment"); | |
693 | return 0; | |
694 | } | |
695 | ||
696 | if(strlen(comment) > BANREASONLEN) | |
697 | comment[BANREASONLEN] = '\0'; | |
698 | ||
699 | return 1; | |
700 | } | |
701 | ||
702 | /* already_placed_kline() | |
703 | * | |
704 | * inputs - source to notify, user@host to check, tkline time | |
705 | * outputs - 1 if a perm kline or a tkline when a tkline is being | |
706 | * set exists, else 0 | |
707 | * side effects - notifies source_p kline exists | |
708 | */ | |
709 | /* Note: This currently works if the new K-line is a special case of an | |
710 | * existing K-line, but not the other way round. To do that we would | |
711 | * have to walk the hash and check every existing K-line. -A1kmm. | |
712 | */ | |
713 | static int | |
714 | already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int tkline) | |
715 | { | |
716 | const char *reason; | |
717 | struct irc_sockaddr_storage iphost, *piphost; | |
718 | struct ConfItem *aconf; | |
719 | int t; | |
720 | if(ConfigFileEntry.non_redundant_klines) | |
721 | { | |
722 | if((t = parse_netmask(lhost, (struct sockaddr *)&iphost, NULL)) != HM_HOST) | |
723 | { | |
724 | #ifdef IPV6 | |
725 | if(t == HM_IPV6) | |
726 | t = AF_INET6; | |
727 | else | |
728 | #endif | |
729 | t = AF_INET; | |
730 | ||
731 | piphost = &iphost; | |
732 | } | |
733 | else | |
734 | piphost = NULL; | |
735 | ||
736 | if((aconf = find_conf_by_address(lhost, NULL, NULL, (struct sockaddr *)piphost, CONF_KILL, t, luser))) | |
737 | { | |
738 | /* setting a tkline, or existing one is perm */ | |
739 | if(tkline || ((aconf->flags & CONF_FLAGS_TEMPORARY) == 0)) | |
740 | { | |
741 | reason = aconf->passwd ? aconf->passwd : "<No Reason>"; | |
742 | ||
743 | sendto_one_notice(source_p, | |
744 | ":[%s@%s] already K-Lined by [%s@%s] - %s", | |
745 | luser, lhost, aconf->user, | |
746 | aconf->host, reason); | |
747 | return 1; | |
748 | } | |
749 | } | |
750 | } | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | /* remove_permkline_match() | |
756 | * | |
757 | * hunts for a permanent kline, and removes it. | |
758 | */ | |
759 | static void | |
760 | remove_permkline_match(struct Client *source_p, struct ConfItem *aconf) | |
761 | { | |
762 | FILE *in, *out; | |
763 | int pairme = 0; | |
764 | int error_on_write = NO; | |
765 | char buf[BUFSIZE]; | |
766 | char matchbuf[BUFSIZE]; | |
767 | char temppath[BUFSIZE]; | |
768 | const char *filename; | |
769 | const char *host, *user; | |
770 | mode_t oldumask; | |
771 | int matchlen; | |
772 | ||
773 | host = aconf->host; | |
774 | user = aconf->user; | |
775 | ||
776 | ircsnprintf(temppath, sizeof(temppath), | |
777 | "%s.tmp", ConfigFileEntry.klinefile); | |
778 | ||
779 | filename = get_conf_name(KLINE_TYPE); | |
780 | ||
781 | if((in = fopen(filename, "r")) == 0) | |
782 | { | |
783 | sendto_one_notice(source_p, ":Cannot open %s", filename); | |
784 | return; | |
785 | } | |
786 | ||
787 | oldumask = umask(0); | |
788 | if((out = fopen(temppath, "w")) == 0) | |
789 | { | |
790 | sendto_one_notice(source_p, ":Cannot open %s", temppath); | |
791 | fclose(in); | |
792 | umask(oldumask); | |
793 | return; | |
794 | } | |
795 | ||
796 | umask(oldumask); | |
797 | ||
798 | snprintf(matchbuf, sizeof(matchbuf), "\"%s\",\"%s\"", user, host); | |
799 | matchlen = strlen(matchbuf); | |
800 | ||
801 | while (fgets(buf, sizeof(buf), in)) | |
802 | { | |
803 | if(error_on_write) | |
804 | break; | |
805 | ||
806 | if(!strncasecmp(buf, matchbuf, matchlen)) | |
807 | { | |
808 | pairme++; | |
809 | break; | |
810 | } | |
811 | else | |
812 | error_on_write = flush_write(source_p, out, buf, temppath); | |
813 | } | |
814 | ||
815 | /* we dropped out of the loop early because we found a match, | |
816 | * to drop into this somewhat faster loop as we presume we'll never | |
817 | * have two matching klines --anfl | |
818 | */ | |
819 | if(pairme && !error_on_write) | |
820 | { | |
821 | while(fgets(buf, sizeof(buf), in)) | |
822 | { | |
823 | if(error_on_write) | |
824 | break; | |
825 | ||
826 | error_on_write = flush_write(source_p, out, buf, temppath); | |
827 | } | |
828 | } | |
829 | ||
830 | fclose(in); | |
831 | if (fclose(out)) | |
832 | error_on_write = YES; | |
833 | ||
834 | /* The result of the rename should be checked too... oh well */ | |
835 | /* If there was an error on a write above, then its been reported | |
836 | * and I am not going to trash the original kline /conf file | |
837 | */ | |
838 | if(error_on_write) | |
839 | { | |
840 | sendto_one_notice(source_p, ":Couldn't write temp kline file, aborted"); | |
841 | return; | |
842 | } | |
843 | else if(!pairme) | |
844 | { | |
845 | sendto_one_notice(source_p, ":Cannot find K-Line for %s@%s in file", | |
846 | user, host); | |
847 | ||
848 | if(temppath != NULL) | |
849 | (void) unlink(temppath); | |
850 | ||
851 | return; | |
852 | } | |
853 | ||
854 | if (rename(temppath, filename)) | |
855 | { | |
856 | sendto_one_notice(source_p, ":Couldn't rename temp file, aborted"); | |
857 | return; | |
858 | } | |
859 | ||
860 | sendto_one_notice(source_p, ":K-Line for [%s@%s] is removed", | |
861 | user, host); | |
862 | ||
863 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
864 | "%s has removed the K-Line for: [%s@%s]", | |
865 | get_oper_name(source_p), user, host); | |
866 | ||
867 | ilog(L_KLINE, "UK %s %s %s", | |
868 | get_oper_name(source_p), user, host); | |
869 | ||
870 | remove_reject_mask(aconf->user, aconf->host); | |
871 | delete_one_address_conf(aconf->host, aconf); | |
872 | ||
873 | return; | |
874 | } | |
875 | ||
876 | /* | |
877 | * flush_write() | |
878 | * | |
879 | * inputs - pointer to client structure of oper requesting unkline | |
880 | * - out is the file descriptor | |
881 | * - buf is the buffer to write | |
882 | * - ntowrite is the expected number of character to be written | |
883 | * - temppath is the temporary file name to be written | |
884 | * output - YES for error on write | |
885 | * - NO for success | |
886 | * side effects - if successful, the buf is written to output file | |
887 | * if a write failure happesn, and the file pointed to | |
888 | * by temppath, if its non NULL, is removed. | |
889 | * | |
890 | * The idea here is, to be as robust as possible when writing to the | |
891 | * kline file. | |
892 | * | |
893 | * -Dianora | |
894 | */ | |
895 | ||
896 | static int | |
897 | flush_write(struct Client *source_p, FILE * out, const char *buf, const char *temppath) | |
898 | { | |
899 | int error_on_write = (fputs(buf, out) < 0) ? YES : NO; | |
900 | ||
901 | if(error_on_write) | |
902 | { | |
903 | sendto_one_notice(source_p, ":Unable to write to %s", | |
904 | temppath); | |
905 | if(temppath != NULL) | |
906 | (void) unlink(temppath); | |
907 | } | |
908 | return (error_on_write); | |
909 | } | |
910 | ||
911 | /* remove_temp_kline() | |
912 | * | |
913 | * inputs - username, hostname to unkline | |
914 | * outputs - | |
915 | * side effects - tries to unkline anything that matches | |
916 | */ | |
917 | static int | |
918 | remove_temp_kline(struct ConfItem *aconf) | |
919 | { | |
920 | dlink_node *ptr; | |
921 | int i; | |
922 | ||
923 | for (i = 0; i < LAST_TEMP_TYPE; i++) | |
924 | { | |
925 | DLINK_FOREACH(ptr, temp_klines[i].head) | |
926 | { | |
927 | if (aconf == ptr->data) | |
928 | { | |
929 | dlinkDestroy(ptr, &temp_klines[i]); | |
930 | remove_reject_mask(aconf->user, aconf->host); | |
931 | delete_one_address_conf(aconf->host, aconf); | |
932 | return YES; | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
937 | return NO; | |
938 | } |