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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 "channel.h" | |
29 | #include "class.h" | |
30 | #include "client.h" | |
31 | #include "common.h" | |
32 | #include "irc_string.h" | |
33 | #include "sprintf_irc.h" | |
34 | #include "ircd.h" | |
35 | #include "hostmask.h" | |
36 | #include "numeric.h" | |
37 | #include "s_conf.h" | |
38 | #include "s_newconf.h" | |
39 | #include "s_log.h" | |
40 | #include "send.h" | |
41 | #include "hash.h" | |
42 | #include "s_serv.h" | |
43 | #include "msg.h" | |
44 | #include "parse.h" | |
45 | #include "modules.h" | |
46 | #include "reject.h" | |
47 | ||
48 | static int mo_kline(struct Client *, struct Client *, int, const char **); | |
49 | static int ms_kline(struct Client *, struct Client *, int, const char **); | |
50 | static int me_kline(struct Client *, struct Client *, int, const char **); | |
51 | static int mo_unkline(struct Client *, struct Client *, int, const char **); | |
52 | static int ms_unkline(struct Client *, struct Client *, int, const char **); | |
53 | static int me_unkline(struct Client *, struct Client *, int, const char **); | |
54 | ||
55 | struct Message kline_msgtab = { | |
56 | "KLINE", 0, 0, 0, MFLG_SLOW, | |
57 | {mg_unreg, mg_not_oper, {ms_kline, 5}, {ms_kline, 5}, {me_kline, 5}, {mo_kline, 3}} | |
58 | }; | |
59 | ||
60 | struct Message unkline_msgtab = { | |
61 | "UNKLINE", 0, 0, 0, MFLG_SLOW, | |
62 | {mg_unreg, mg_not_oper, {ms_unkline, 4}, {ms_unkline, 4}, {me_unkline, 3}, {mo_unkline, 2}} | |
63 | }; | |
64 | ||
65 | mapi_clist_av1 kline_clist[] = { &kline_msgtab, &unkline_msgtab, NULL }; | |
66 | DECLARE_MODULE_AV1(kline, NULL, NULL, kline_clist, NULL, NULL, "$Revision: 3466 $"); | |
67 | ||
68 | /* Local function prototypes */ | |
69 | static int find_user_host(struct Client *source_p, const char *userhost, char *user, char *host); | |
70 | static int valid_comment(struct Client *source_p, char *comment); | |
71 | static int valid_user_host(struct Client *source_p, const char *user, const char *host); | |
72 | static int valid_wild_card(struct Client *source_p, const char *user, const char *host); | |
73 | ||
74 | static void handle_remote_kline(struct Client *source_p, int tkline_time, | |
75 | const char *user, const char *host, const char *reason); | |
76 | static void apply_kline(struct Client *source_p, struct ConfItem *aconf, | |
77 | const char *reason, const char *oper_reason, const char *current_date); | |
78 | static void apply_tkline(struct Client *source_p, struct ConfItem *aconf, | |
79 | const char *, const char *, const char *, int); | |
80 | static int already_placed_kline(struct Client *, const char *, const char *, int); | |
81 | ||
82 | static void handle_remote_unkline(struct Client *source_p, | |
83 | const char *user, const char *host); | |
84 | static void remove_permkline_match(struct Client *, struct ConfItem *); | |
85 | static int flush_write(struct Client *, FILE *, const char *, const char *); | |
86 | static int remove_temp_kline(struct Client *, struct ConfItem *); | |
87 | ||
88 | /* mo_kline() | |
89 | * | |
90 | * parv[1] - temp time or user@host | |
91 | * parv[2] - user@host, "ON", or reason | |
92 | * parv[3] - "ON", reason, or server to target | |
93 | * parv[4] - server to target, or reason | |
94 | * parv[5] - reason | |
95 | */ | |
96 | static int | |
97 | mo_kline(struct Client *client_p, struct Client *source_p, | |
98 | int parc, const char **parv) | |
99 | { | |
100 | char def[] = "No Reason"; | |
101 | char user[USERLEN + 2]; | |
102 | char host[HOSTLEN + 2]; | |
103 | char buffer[IRCD_BUFSIZE]; | |
104 | char *reason = def; | |
105 | char *oper_reason; | |
106 | const char *current_date; | |
107 | const char *target_server = NULL; | |
108 | struct ConfItem *aconf; | |
109 | int tkline_time = 0; | |
110 | int loc = 1; | |
111 | ||
112 | if(!IsOperK(source_p)) | |
113 | { | |
114 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
115 | me.name, source_p->name, "kline"); | |
116 | return 0; | |
117 | } | |
118 | ||
119 | if((tkline_time = valid_temp_time(parv[loc])) >= 0) | |
120 | loc++; | |
121 | /* we just set tkline_time to -1! */ | |
122 | else | |
123 | tkline_time = 0; | |
124 | ||
125 | if(find_user_host(source_p, parv[loc], user, host) == 0) | |
126 | return 0; | |
127 | ||
128 | loc++; | |
129 | ||
130 | if(parc >= loc+2 && !irccmp(parv[loc], "ON")) | |
131 | { | |
132 | if(!IsOperRemoteBan(source_p)) | |
133 | { | |
134 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
135 | me.name, source_p->name, "remoteban"); | |
136 | return 0; | |
137 | } | |
138 | ||
139 | target_server = parv[loc+1]; | |
140 | loc += 2; | |
141 | } | |
142 | ||
143 | if(parc <= loc || EmptyString(parv[loc])) | |
144 | { | |
145 | sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), | |
146 | me.name, source_p->name, "KLINE"); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | reason = LOCAL_COPY(parv[loc]); | |
151 | ||
152 | if(target_server != NULL) | |
153 | { | |
154 | propagate_generic(source_p, "KLINE", target_server, CAP_KLN, | |
155 | "%d %s %s :%s", | |
156 | tkline_time, user, host, reason); | |
157 | ||
158 | /* If we are sending it somewhere that doesnt include us, stop */ | |
159 | if(!match(target_server, me.name)) | |
160 | return 0; | |
161 | } | |
162 | /* if we have cluster servers, send it to them.. */ | |
163 | else if(rb_dlink_list_length(&cluster_conf_list) > 0) | |
164 | cluster_generic(source_p, "KLINE", | |
165 | (tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE, CAP_KLN, | |
166 | "%lu %s %s :%s", | |
167 | tkline_time, user, host, reason); | |
168 | ||
169 | if(!valid_user_host(source_p, user, host) || | |
170 | !valid_wild_card(source_p, user, host) || | |
171 | !valid_comment(source_p, reason)) | |
172 | return 0; | |
173 | ||
174 | if(already_placed_kline(source_p, user, host, tkline_time)) | |
175 | return 0; | |
176 | ||
177 | set_time(); | |
178 | current_date = smalldate(); | |
179 | aconf = make_conf(); | |
180 | aconf->status = CONF_KILL; | |
181 | aconf->host = rb_strdup(host); | |
182 | aconf->user = rb_strdup(user); | |
183 | aconf->port = 0; | |
184 | ||
185 | /* Look for an oper reason */ | |
186 | if((oper_reason = strchr(reason, '|')) != NULL) | |
187 | { | |
188 | *oper_reason = '\0'; | |
189 | oper_reason++; | |
190 | ||
191 | if(!EmptyString(oper_reason)) | |
192 | aconf->spasswd = rb_strdup(oper_reason); | |
193 | } | |
194 | ||
195 | if(tkline_time > 0) | |
196 | { | |
197 | rb_snprintf(buffer, sizeof(buffer), | |
198 | "Temporary K-line %d min. - %s (%s)", | |
199 | (int) (tkline_time / 60), reason, current_date); | |
200 | aconf->passwd = rb_strdup(buffer); | |
201 | apply_tkline(source_p, aconf, reason, oper_reason, current_date, tkline_time); | |
202 | } | |
203 | else | |
204 | { | |
205 | rb_snprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date); | |
206 | aconf->passwd = rb_strdup(buffer); | |
207 | apply_kline(source_p, aconf, reason, oper_reason, current_date); | |
208 | } | |
209 | ||
210 | if(ConfigFileEntry.kline_delay) | |
211 | { | |
212 | if(kline_queued == 0) | |
213 | { | |
214 | rb_event_addonce("check_klines", check_klines_event, NULL, | |
215 | ConfigFileEntry.kline_delay); | |
216 | kline_queued = 1; | |
217 | } | |
218 | } | |
219 | else | |
220 | check_klines(); | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | /* ms_kline() | |
226 | * | |
227 | * parv[1] - server targeted at | |
228 | * parv[2] - tkline time (0 if perm) | |
229 | * parv[3] - user | |
230 | * parv[4] - host | |
231 | * parv[5] - reason | |
232 | */ | |
233 | static int | |
234 | ms_kline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
235 | { | |
236 | int tkline_time = atoi(parv[2]); | |
237 | ||
238 | /* 1.5-3 and earlier contains a bug that allows remote klines to be | |
239 | * sent with an empty reason field. This is a protocol violation, | |
240 | * but its not worth dropping the link over.. --anfl | |
241 | */ | |
242 | if(parc < 6 || EmptyString(parv[5])) | |
243 | return 0; | |
244 | ||
245 | propagate_generic(source_p, "KLINE", parv[1], CAP_KLN, | |
246 | "%d %s %s :%s", | |
247 | tkline_time, parv[3], parv[4], parv[5]); | |
248 | ||
249 | if(!match(parv[1], me.name)) | |
250 | return 0; | |
251 | ||
252 | if(!IsPerson(source_p)) | |
253 | return 0; | |
254 | ||
255 | handle_remote_kline(source_p, tkline_time, parv[3], parv[4], parv[5]); | |
256 | return 0; | |
257 | } | |
258 | ||
259 | static int | |
260 | me_kline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
261 | { | |
262 | /* <tkline_time> <user> <host> :<reason> */ | |
263 | if(!IsPerson(source_p)) | |
264 | return 0; | |
265 | ||
266 | handle_remote_kline(source_p, atoi(parv[1]), parv[2], parv[3], parv[4]); | |
267 | return 0; | |
268 | } | |
269 | ||
270 | static void | |
271 | handle_remote_kline(struct Client *source_p, int tkline_time, | |
272 | const char *user, const char *host, const char *kreason) | |
273 | { | |
274 | char buffer[BUFSIZE]; | |
275 | const char *current_date; | |
276 | char *reason = LOCAL_COPY(kreason); | |
277 | struct ConfItem *aconf = NULL; | |
278 | char *oper_reason; | |
279 | ||
280 | if(!find_shared_conf(source_p->username, source_p->host, | |
281 | source_p->servptr->name, | |
282 | (tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE)) | |
283 | return; | |
284 | ||
285 | if(!valid_user_host(source_p, user, host) || | |
286 | !valid_wild_card(source_p, user, host) || | |
287 | !valid_comment(source_p, reason)) | |
288 | return; | |
289 | ||
290 | if(already_placed_kline(source_p, user, host, tkline_time)) | |
291 | return; | |
292 | ||
293 | aconf = make_conf(); | |
294 | ||
295 | aconf->status = CONF_KILL; | |
296 | aconf->user = rb_strdup(user); | |
297 | aconf->host = rb_strdup(host); | |
298 | ||
299 | /* Look for an oper reason */ | |
300 | if((oper_reason = strchr(reason, '|')) != NULL) | |
301 | { | |
302 | *oper_reason = '\0'; | |
303 | oper_reason++; | |
304 | ||
305 | if(!EmptyString(oper_reason)) | |
306 | aconf->spasswd = rb_strdup(oper_reason); | |
307 | } | |
308 | ||
309 | current_date = smalldate(); | |
310 | ||
311 | if(tkline_time > 0) | |
312 | { | |
313 | rb_snprintf(buffer, sizeof(buffer), | |
314 | "Temporary K-line %d min. - %s (%s)", | |
315 | (int) (tkline_time / 60), reason, current_date); | |
316 | aconf->passwd = rb_strdup(buffer); | |
317 | apply_tkline(source_p, aconf, reason, oper_reason, current_date, tkline_time); | |
318 | } | |
319 | else | |
320 | { | |
321 | rb_snprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date); | |
322 | aconf->passwd = rb_strdup(buffer); | |
323 | apply_kline(source_p, aconf, reason, oper_reason, current_date); | |
324 | } | |
325 | ||
326 | if(ConfigFileEntry.kline_delay) | |
327 | { | |
328 | if(kline_queued == 0) | |
329 | { | |
330 | rb_event_addonce("check_klines", check_klines_event, NULL, | |
331 | ConfigFileEntry.kline_delay); | |
332 | kline_queued = 1; | |
333 | } | |
334 | } | |
335 | else | |
336 | check_klines(); | |
337 | ||
338 | return; | |
339 | } | |
340 | ||
341 | /* mo_unkline() | |
342 | * | |
343 | * parv[1] - kline to remove | |
344 | * parv[2] - optional "ON" | |
345 | * parv[3] - optional target server | |
346 | */ | |
347 | static int | |
348 | mo_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
349 | { | |
350 | const char *user; | |
351 | char *host; | |
352 | char splat[] = "*"; | |
353 | char *h = LOCAL_COPY(parv[1]); | |
354 | struct ConfItem *aconf; | |
355 | ||
356 | if(!IsOperUnkline(source_p)) | |
357 | { | |
358 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
359 | me.name, source_p->name, "unkline"); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | if((host = strchr(h, '@')) || *h == '*' || strchr(h, '.') || strchr(h, ':')) | |
364 | { | |
365 | /* Explicit user@host mask given */ | |
366 | ||
367 | if(host) /* Found user@host */ | |
368 | { | |
369 | *host++ = '\0'; | |
370 | ||
371 | /* check for @host */ | |
372 | if(*h) | |
373 | user = h; | |
374 | else | |
375 | user = splat; | |
376 | ||
377 | /* check for user@ */ | |
378 | if(!*host) | |
379 | host = splat; | |
380 | } | |
381 | else | |
382 | { | |
383 | user = splat; /* no @ found, assume its *@somehost */ | |
384 | host = h; | |
385 | } | |
386 | } | |
387 | else | |
388 | { | |
389 | sendto_one_notice(source_p, ":Invalid parameters"); | |
390 | return 0; | |
391 | } | |
392 | ||
393 | /* possible remote kline.. */ | |
394 | if((parc > 3) && (irccmp(parv[2], "ON") == 0)) | |
395 | { | |
396 | if(!IsOperRemoteBan(source_p)) | |
397 | { | |
398 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
399 | me.name, source_p->name, "remoteban"); | |
400 | return 0; | |
401 | } | |
402 | ||
403 | propagate_generic(source_p, "UNKLINE", parv[3], CAP_UNKLN, | |
404 | "%s %s", user, host); | |
405 | ||
406 | if(match(parv[3], me.name) == 0) | |
407 | return 0; | |
408 | } | |
409 | else if(rb_dlink_list_length(&cluster_conf_list) > 0) | |
410 | cluster_generic(source_p, "UNKLINE", SHARED_UNKLINE, CAP_UNKLN, | |
411 | "%s %s", user, host); | |
412 | ||
413 | aconf = find_exact_conf_by_address(host, CONF_KILL, user); | |
414 | if(aconf == NULL) | |
415 | { | |
416 | sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host); | |
417 | return 0; | |
418 | } | |
419 | ||
420 | if(remove_temp_kline(source_p, aconf)) | |
421 | return 0; | |
422 | ||
423 | remove_permkline_match(source_p, aconf); | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | /* ms_unkline() | |
429 | * | |
430 | * parv[1] - target server | |
431 | * parv[2] - user to unkline | |
432 | * parv[3] - host to unkline | |
433 | */ | |
434 | static int | |
435 | ms_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
436 | { | |
437 | /* parv[0] parv[1] parv[2] parv[3] | |
438 | * oper target server user host */ | |
439 | propagate_generic(source_p, "UNKLINE", parv[1], CAP_UNKLN, | |
440 | "%s %s", parv[2], parv[3]); | |
441 | ||
442 | if(!match(parv[1], me.name)) | |
443 | return 0; | |
444 | ||
445 | if(!IsPerson(source_p)) | |
446 | return 0; | |
447 | ||
448 | handle_remote_unkline(source_p, parv[2], parv[3]); | |
449 | return 0; | |
450 | } | |
451 | ||
452 | static int | |
453 | me_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
454 | { | |
455 | /* user host */ | |
456 | if(!IsPerson(source_p)) | |
457 | return 0; | |
458 | ||
459 | handle_remote_unkline(source_p, parv[1], parv[2]); | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static void | |
464 | handle_remote_unkline(struct Client *source_p, const char *user, const char *host) | |
465 | { | |
466 | struct ConfItem *aconf; | |
467 | ||
468 | if(!find_shared_conf(source_p->username, source_p->host, | |
469 | source_p->servptr->name, SHARED_UNKLINE)) | |
470 | return; | |
471 | ||
472 | aconf = find_exact_conf_by_address(host, CONF_KILL, user); | |
473 | if(aconf == NULL) | |
474 | { | |
475 | sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host); | |
476 | return; | |
477 | } | |
478 | ||
479 | if(remove_temp_kline(source_p, aconf)) | |
480 | return; | |
481 | ||
482 | remove_permkline_match(source_p, aconf); | |
483 | } | |
484 | ||
485 | /* apply_kline() | |
486 | * | |
487 | * inputs - | |
488 | * output - NONE | |
489 | * side effects - kline as given, is added to the hashtable | |
490 | * and conf file | |
491 | */ | |
492 | static void | |
493 | apply_kline(struct Client *source_p, struct ConfItem *aconf, | |
494 | const char *reason, const char *oper_reason, const char *current_date) | |
495 | { | |
496 | add_conf_by_address(aconf->host, CONF_KILL, aconf->user, aconf); | |
497 | write_confitem(KLINE_TYPE, source_p, aconf->user, aconf->host, | |
498 | reason, oper_reason, current_date, 0); | |
499 | } | |
500 | ||
501 | /* apply_tkline() | |
502 | * | |
503 | * inputs - | |
504 | * output - NONE | |
505 | * side effects - tkline as given is placed | |
506 | */ | |
507 | static void | |
508 | apply_tkline(struct Client *source_p, struct ConfItem *aconf, | |
509 | const char *reason, const char *oper_reason, const char *current_date, int tkline_time) | |
510 | { | |
511 | aconf->hold = CurrentTime + tkline_time; | |
512 | add_temp_kline(aconf); | |
513 | ||
514 | /* no oper reason.. */ | |
515 | if(EmptyString(oper_reason)) | |
516 | { | |
517 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
518 | "%s added temporary %d min. K-Line for [%s@%s] [%s]", | |
519 | get_oper_name(source_p), tkline_time / 60, | |
520 | aconf->user, aconf->host, reason); | |
521 | ilog(L_KLINE, "K %s %d %s %s %s", | |
522 | get_oper_name(source_p), tkline_time / 60, | |
523 | aconf->user, aconf->host, reason); | |
524 | } | |
525 | else | |
526 | { | |
527 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
528 | "%s added temporary %d min. K-Line for [%s@%s] [%s|%s]", | |
529 | get_oper_name(source_p), tkline_time / 60, | |
530 | aconf->user, aconf->host, reason, oper_reason); | |
531 | ilog(L_KLINE, "K %s %d %s %s %s|%s", | |
532 | get_oper_name(source_p), tkline_time / 60, | |
533 | aconf->user, aconf->host, reason, oper_reason); | |
534 | } | |
535 | ||
536 | sendto_one_notice(source_p, ":Added temporary %d min. K-Line [%s@%s]", | |
537 | tkline_time / 60, aconf->user, aconf->host); | |
538 | } | |
539 | ||
540 | /* find_user_host() | |
541 | * | |
542 | * inputs - client placing kline, user@host, user buffer, host buffer | |
543 | * output - 0 if not ok to kline, 1 to kline i.e. if valid user host | |
544 | * side effects - | |
545 | */ | |
546 | static int | |
547 | find_user_host(struct Client *source_p, const char *userhost, char *luser, char *lhost) | |
548 | { | |
549 | char *hostp; | |
550 | ||
551 | hostp = strchr(userhost, '@'); | |
552 | ||
553 | if(hostp != NULL) /* I'm a little user@host */ | |
554 | { | |
555 | *(hostp++) = '\0'; /* short and squat */ | |
556 | if(*userhost) | |
557 | strlcpy(luser, userhost, USERLEN + 1); /* here is my user */ | |
558 | else | |
559 | strcpy(luser, "*"); | |
560 | if(*hostp) | |
561 | strlcpy(lhost, hostp, HOSTLEN + 1); /* here is my host */ | |
562 | else | |
563 | strcpy(lhost, "*"); | |
564 | } | |
565 | else | |
566 | { | |
567 | /* no '@', no '.', so its not a user@host or host, therefore | |
568 | * its a nick, which support was removed for. | |
569 | */ | |
570 | if(strchr(userhost, '.') == NULL && strchr(userhost, ':') == NULL) | |
571 | return 0; | |
572 | ||
573 | luser[0] = '*'; /* no @ found, assume its *@somehost */ | |
574 | luser[1] = '\0'; | |
575 | strlcpy(lhost, userhost, HOSTLEN + 1); | |
576 | } | |
577 | ||
578 | return 1; | |
579 | } | |
580 | ||
581 | /* valid_user_host() | |
582 | * | |
583 | * inputs - user buffer, host buffer | |
584 | * output - 0 if invalid, 1 if valid | |
585 | * side effects - | |
586 | */ | |
587 | static int | |
588 | valid_user_host(struct Client *source_p, const char *luser, const char *lhost) | |
589 | { | |
590 | /* # is invalid, as is '!' (n!u@h kline) */ | |
591 | if(strchr(lhost, '#') || strchr(luser, '#') || strchr(luser, '!')) | |
592 | { | |
593 | sendto_one_notice(source_p, ":Invalid K-Line"); | |
594 | return 0; | |
595 | } | |
596 | ||
597 | return 1; | |
598 | } | |
599 | ||
600 | /* valid_wild_card() | |
601 | * | |
602 | * input - user buffer, host buffer | |
603 | * output - 0 if invalid, 1 if valid | |
604 | * side effects - | |
605 | */ | |
606 | static int | |
607 | valid_wild_card(struct Client *source_p, const char *luser, const char *lhost) | |
608 | { | |
609 | const char *p; | |
610 | char tmpch; | |
611 | int nonwild = 0; | |
612 | int bitlen; | |
613 | ||
614 | /* user has no wildcards, always accept -- jilles */ | |
615 | if (!strchr(luser, '?') && !strchr(luser, '*')) | |
616 | return 1; | |
617 | ||
618 | /* check there are enough non wildcard chars */ | |
619 | p = luser; | |
620 | while ((tmpch = *p++)) | |
621 | { | |
622 | if(!IsKWildChar(tmpch)) | |
623 | { | |
624 | /* found enough chars, return */ | |
625 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
626 | return 1; | |
627 | } | |
628 | } | |
629 | ||
630 | /* try host, as user didnt contain enough */ | |
631 | /* special case for cidr masks -- jilles */ | |
632 | if ((p = strrchr(lhost, '/')) != NULL && IsDigit(p[1])) | |
633 | { | |
634 | bitlen = atoi(p + 1); | |
635 | /* much like non-cidr for ipv6, rather arbitrary for ipv4 */ | |
636 | if (bitlen > 0 && bitlen >= (strchr(lhost, ':') ? 4 * (ConfigFileEntry.min_nonwildcard - nonwild) : 6 - 2 * nonwild)) | |
637 | return 1; | |
638 | } | |
639 | else | |
640 | { | |
641 | p = lhost; | |
642 | while ((tmpch = *p++)) | |
643 | { | |
644 | if(!IsKWildChar(tmpch)) | |
645 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
646 | return 1; | |
647 | } | |
648 | } | |
649 | ||
650 | sendto_one_notice(source_p, | |
651 | ":Please include at least %d non-wildcard " | |
652 | "characters with the user@host", | |
653 | ConfigFileEntry.min_nonwildcard); | |
654 | return 0; | |
655 | } | |
656 | ||
657 | /* | |
658 | * valid_comment | |
659 | * inputs - pointer to client | |
660 | * - pointer to comment | |
661 | * output - 0 if no valid comment, 1 if valid | |
662 | * side effects - NONE | |
663 | */ | |
664 | static int | |
665 | valid_comment(struct Client *source_p, char *comment) | |
666 | { | |
667 | if(strchr(comment, '"')) | |
668 | { | |
669 | sendto_one_notice(source_p, ":Invalid character '\"' in comment"); | |
670 | return 0; | |
671 | } | |
672 | ||
673 | if(strlen(comment) > BANREASONLEN) | |
674 | comment[BANREASONLEN] = '\0'; | |
675 | ||
676 | return 1; | |
677 | } | |
678 | ||
679 | /* already_placed_kline() | |
680 | * | |
681 | * inputs - source to notify, user@host to check, tkline time | |
682 | * outputs - 1 if a perm kline or a tkline when a tkline is being | |
683 | * set exists, else 0 | |
684 | * side effects - notifies source_p kline exists | |
685 | */ | |
686 | /* Note: This currently works if the new K-line is a special case of an | |
687 | * existing K-line, but not the other way round. To do that we would | |
688 | * have to walk the hash and check every existing K-line. -A1kmm. | |
689 | */ | |
690 | static int | |
691 | already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int tkline) | |
692 | { | |
693 | const char *reason, *p; | |
694 | struct irc_sockaddr_storage iphost, *piphost; | |
695 | struct ConfItem *aconf; | |
696 | int t, bits; | |
697 | ||
698 | aconf = find_exact_conf_by_address(lhost, CONF_KILL, luser); | |
699 | if (aconf == NULL && ConfigFileEntry.non_redundant_klines) | |
700 | { | |
701 | bits = 0; | |
702 | if((t = parse_netmask(lhost, (struct sockaddr *)&iphost, &bits)) != HM_HOST) | |
703 | { | |
704 | #ifdef IPV6 | |
705 | if(t == HM_IPV6) | |
706 | t = AF_INET6; | |
707 | else | |
708 | #endif | |
709 | t = AF_INET; | |
710 | ||
711 | piphost = &iphost; | |
712 | } | |
713 | else | |
714 | piphost = NULL; | |
715 | ||
716 | aconf = find_conf_by_address(lhost, NULL, NULL, (struct sockaddr *)piphost, CONF_KILL, t, luser); | |
717 | if (aconf != NULL) | |
718 | { | |
719 | /* The above was really a lookup of a single IP, | |
720 | * so check if the new kline is wider than the | |
721 | * existing one. | |
722 | * -- jilles | |
723 | */ | |
724 | p = strchr(aconf->host, '/'); | |
725 | if (bits > 0 && (p == NULL || bits < atoi(p + 1))) | |
726 | aconf = NULL; | |
727 | } | |
728 | } | |
729 | if (aconf != NULL) | |
730 | { | |
731 | /* setting a tkline, or existing one is perm */ | |
732 | if(tkline || ((aconf->flags & CONF_FLAGS_TEMPORARY) == 0)) | |
733 | { | |
734 | reason = aconf->passwd ? aconf->passwd : "<No Reason>"; | |
735 | ||
736 | sendto_one_notice(source_p, | |
737 | ":[%s@%s] already K-Lined by [%s@%s] - %s", | |
738 | luser, lhost, aconf->user, | |
739 | aconf->host, reason); | |
740 | return 1; | |
741 | } | |
742 | } | |
743 | ||
744 | return 0; | |
745 | } | |
746 | ||
747 | /* remove_permkline_match() | |
748 | * | |
749 | * hunts for a permanent kline, and removes it. | |
750 | */ | |
751 | static void | |
752 | remove_permkline_match(struct Client *source_p, struct ConfItem *aconf) | |
753 | { | |
754 | FILE *in, *out; | |
755 | int pairme = 0; | |
756 | int error_on_write = NO; | |
757 | char buf[BUFSIZE]; | |
758 | char matchbuf[BUFSIZE]; | |
759 | char temppath[BUFSIZE]; | |
760 | const char *filename; | |
761 | const char *host, *user; | |
762 | mode_t oldumask; | |
763 | int matchlen; | |
764 | ||
765 | host = aconf->host; | |
766 | user = aconf->user; | |
767 | ||
768 | rb_snprintf(temppath, sizeof(temppath), | |
769 | "%s.tmp", ConfigFileEntry.klinefile); | |
770 | ||
771 | filename = get_conf_name(KLINE_TYPE); | |
772 | ||
773 | if((in = fopen(filename, "r")) == 0) | |
774 | { | |
775 | sendto_one_notice(source_p, ":Cannot open %s", filename); | |
776 | return; | |
777 | } | |
778 | ||
779 | oldumask = umask(0); | |
780 | if((out = fopen(temppath, "w")) == 0) | |
781 | { | |
782 | sendto_one_notice(source_p, ":Cannot open %s", temppath); | |
783 | fclose(in); | |
784 | umask(oldumask); | |
785 | return; | |
786 | } | |
787 | ||
788 | umask(oldumask); | |
789 | ||
790 | snprintf(matchbuf, sizeof(matchbuf), "\"%s\",\"%s\"", user, host); | |
791 | matchlen = strlen(matchbuf); | |
792 | ||
793 | while (fgets(buf, sizeof(buf), in)) | |
794 | { | |
795 | if(error_on_write) | |
796 | break; | |
797 | ||
798 | if(!strncasecmp(buf, matchbuf, matchlen)) | |
799 | { | |
800 | pairme++; | |
801 | break; | |
802 | } | |
803 | else | |
804 | error_on_write = flush_write(source_p, out, buf, temppath); | |
805 | } | |
806 | ||
807 | /* we dropped out of the loop early because we found a match, | |
808 | * to drop into this somewhat faster loop as we presume we'll never | |
809 | * have two matching klines --anfl | |
810 | */ | |
811 | if(pairme && !error_on_write) | |
812 | { | |
813 | while(fgets(buf, sizeof(buf), in)) | |
814 | { | |
815 | if(error_on_write) | |
816 | break; | |
817 | ||
818 | error_on_write = flush_write(source_p, out, buf, temppath); | |
819 | } | |
820 | } | |
821 | ||
822 | fclose(in); | |
823 | if (fclose(out)) | |
824 | error_on_write = YES; | |
825 | ||
826 | /* The result of the rename should be checked too... oh well */ | |
827 | /* If there was an error on a write above, then its been reported | |
828 | * and I am not going to trash the original kline /conf file | |
829 | */ | |
830 | if(error_on_write) | |
831 | { | |
832 | sendto_one_notice(source_p, ":Couldn't write temp kline file, aborted"); | |
833 | return; | |
834 | } | |
835 | else if(!pairme) | |
836 | { | |
837 | sendto_one_notice(source_p, ":Cannot find K-Line for %s@%s in file", | |
838 | user, host); | |
839 | ||
840 | if(temppath != NULL) | |
841 | (void) unlink(temppath); | |
842 | ||
843 | return; | |
844 | } | |
845 | ||
846 | if (rename(temppath, filename)) | |
847 | { | |
848 | sendto_one_notice(source_p, ":Couldn't rename temp file, aborted"); | |
849 | return; | |
850 | } | |
851 | ||
852 | sendto_one_notice(source_p, ":K-Line for [%s@%s] is removed", | |
853 | user, host); | |
854 | ||
855 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
856 | "%s has removed the K-Line for: [%s@%s]", | |
857 | get_oper_name(source_p), user, host); | |
858 | ||
859 | ilog(L_KLINE, "UK %s %s %s", | |
860 | get_oper_name(source_p), user, host); | |
861 | ||
862 | remove_reject_mask(aconf->user, aconf->host); | |
863 | delete_one_address_conf(aconf->host, aconf); | |
864 | ||
865 | return; | |
866 | } | |
867 | ||
868 | /* | |
869 | * flush_write() | |
870 | * | |
871 | * inputs - pointer to client structure of oper requesting unkline | |
872 | * - out is the file descriptor | |
873 | * - buf is the buffer to write | |
874 | * - ntowrite is the expected number of character to be written | |
875 | * - temppath is the temporary file name to be written | |
876 | * output - YES for error on write | |
877 | * - NO for success | |
878 | * side effects - if successful, the buf is written to output file | |
879 | * if a write failure happesn, and the file pointed to | |
880 | * by temppath, if its non NULL, is removed. | |
881 | * | |
882 | * The idea here is, to be as robust as possible when writing to the | |
883 | * kline file. | |
884 | * | |
885 | * -Dianora | |
886 | */ | |
887 | ||
888 | static int | |
889 | flush_write(struct Client *source_p, FILE * out, const char *buf, const char *temppath) | |
890 | { | |
891 | int error_on_write = (fputs(buf, out) < 0) ? YES : NO; | |
892 | ||
893 | if(error_on_write) | |
894 | { | |
895 | sendto_one_notice(source_p, ":Unable to write to %s", | |
896 | temppath); | |
897 | if(temppath != NULL) | |
898 | (void) unlink(temppath); | |
899 | } | |
900 | return (error_on_write); | |
901 | } | |
902 | ||
903 | /* remove_temp_kline() | |
904 | * | |
905 | * inputs - username, hostname to unkline | |
906 | * outputs - | |
907 | * side effects - tries to unkline anything that matches | |
908 | */ | |
909 | static int | |
910 | remove_temp_kline(struct Client *source_p, struct ConfItem *aconf) | |
911 | { | |
912 | rb_dlink_node *ptr; | |
913 | int i; | |
914 | ||
915 | for (i = 0; i < LAST_TEMP_TYPE; i++) | |
916 | { | |
917 | RB_DLINK_FOREACH(ptr, temp_klines[i].head) | |
918 | { | |
919 | if (aconf == ptr->data) | |
920 | { | |
921 | sendto_one_notice(source_p, | |
922 | ":Un-klined [%s@%s] from temporary k-lines", | |
923 | aconf->user, aconf->host); | |
924 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
925 | "%s has removed the temporary K-Line for: [%s@%s]", | |
926 | get_oper_name(source_p), aconf->user, aconf->host); | |
927 | ||
928 | ilog(L_KLINE, "UK %s %s %s", | |
929 | get_oper_name(source_p), | |
930 | aconf->user, aconf->host); | |
931 | rb_dlinkDestroy(ptr, &temp_klines[i]); | |
932 | remove_reject_mask(aconf->user, aconf->host); | |
933 | delete_one_address_conf(aconf->host, aconf); | |
934 | return YES; | |
935 | } | |
936 | } | |
937 | } | |
938 | ||
939 | return NO; | |
940 | } |