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212380e3 AC |
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 | * | |
88a2a148 | 24 | * $Id: m_kline.c 3466 2007-05-19 23:36:51Z jilles $ |
212380e3 AC |
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" | |
35f6f850 | 49 | #include "reject.h" |
212380e3 AC |
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 }; | |
88a2a148 | 69 | DECLARE_MODULE_AV1(kline, NULL, NULL, kline_clist, NULL, NULL, "$Revision: 3466 $"); |
212380e3 AC |
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); | |
40a1d446 | 87 | static void remove_permkline_match(struct Client *, struct ConfItem *); |
212380e3 | 88 | static int flush_write(struct Client *, FILE *, const char *, const char *); |
d922dded | 89 | static int remove_temp_kline(struct Client *, struct ConfItem *); |
212380e3 AC |
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, | |
c88cdb00 | 284 | source_p->servptr->name, |
212380e3 AC |
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]); | |
40a1d446 | 357 | struct ConfItem *aconf; |
212380e3 AC |
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 | { | |
5366977b | 392 | sendto_one_notice(source_p, ":Invalid parameters"); |
212380e3 AC |
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 | ||
40a1d446 JT |
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 | ||
d922dded | 423 | if(remove_temp_kline(source_p, aconf)) |
212380e3 | 424 | return 0; |
212380e3 | 425 | |
40a1d446 | 426 | remove_permkline_match(source_p, aconf); |
212380e3 AC |
427 | |
428 | return 0; | |
429 | } | |
430 | ||
431 | /* ms_unkline() | |
432 | * | |
433 | * parv[1] - target server | |
434 | * parv[2] - user to unkline | |
435 | * parv[3] - host to unkline | |
436 | */ | |
437 | static int | |
438 | ms_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
439 | { | |
440 | /* parv[0] parv[1] parv[2] parv[3] | |
441 | * oper target server user host */ | |
442 | propagate_generic(source_p, "UNKLINE", parv[1], CAP_UNKLN, | |
443 | "%s %s", parv[2], parv[3]); | |
444 | ||
445 | if(!match(parv[1], me.name)) | |
446 | return 0; | |
447 | ||
448 | if(!IsPerson(source_p)) | |
449 | return 0; | |
450 | ||
451 | handle_remote_unkline(source_p, parv[2], parv[3]); | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static int | |
456 | me_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
457 | { | |
458 | /* user host */ | |
459 | if(!IsPerson(source_p)) | |
460 | return 0; | |
461 | ||
462 | handle_remote_unkline(source_p, parv[1], parv[2]); | |
463 | return 0; | |
464 | } | |
465 | ||
466 | static void | |
467 | handle_remote_unkline(struct Client *source_p, const char *user, const char *host) | |
468 | { | |
40a1d446 JT |
469 | struct ConfItem *aconf; |
470 | ||
212380e3 | 471 | if(!find_shared_conf(source_p->username, source_p->host, |
c88cdb00 | 472 | source_p->servptr->name, SHARED_UNKLINE)) |
212380e3 AC |
473 | return; |
474 | ||
40a1d446 JT |
475 | aconf = find_exact_conf_by_address(host, CONF_KILL, user); |
476 | if(aconf == NULL) | |
477 | { | |
478 | sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host); | |
479 | return; | |
480 | } | |
481 | ||
d922dded | 482 | if(remove_temp_kline(source_p, aconf)) |
212380e3 | 483 | return; |
212380e3 | 484 | |
40a1d446 | 485 | remove_permkline_match(source_p, aconf); |
212380e3 AC |
486 | } |
487 | ||
488 | /* apply_kline() | |
489 | * | |
490 | * inputs - | |
491 | * output - NONE | |
492 | * side effects - kline as given, is added to the hashtable | |
493 | * and conf file | |
494 | */ | |
495 | static void | |
496 | apply_kline(struct Client *source_p, struct ConfItem *aconf, | |
497 | const char *reason, const char *oper_reason, const char *current_date) | |
498 | { | |
499 | add_conf_by_address(aconf->host, CONF_KILL, aconf->user, aconf); | |
500 | write_confitem(KLINE_TYPE, source_p, aconf->user, aconf->host, | |
501 | reason, oper_reason, current_date, 0); | |
502 | } | |
503 | ||
504 | /* apply_tkline() | |
505 | * | |
506 | * inputs - | |
507 | * output - NONE | |
508 | * side effects - tkline as given is placed | |
509 | */ | |
510 | static void | |
511 | apply_tkline(struct Client *source_p, struct ConfItem *aconf, | |
512 | const char *reason, const char *oper_reason, const char *current_date, int tkline_time) | |
513 | { | |
514 | aconf->hold = CurrentTime + tkline_time; | |
515 | add_temp_kline(aconf); | |
516 | ||
517 | /* no oper reason.. */ | |
518 | if(EmptyString(oper_reason)) | |
519 | { | |
520 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
521 | "%s added temporary %d min. K-Line for [%s@%s] [%s]", | |
522 | get_oper_name(source_p), tkline_time / 60, | |
523 | aconf->user, aconf->host, reason); | |
524 | ilog(L_KLINE, "K %s %d %s %s %s", | |
525 | get_oper_name(source_p), tkline_time / 60, | |
526 | aconf->user, aconf->host, reason); | |
527 | } | |
528 | else | |
529 | { | |
530 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
531 | "%s added temporary %d min. K-Line for [%s@%s] [%s|%s]", | |
532 | get_oper_name(source_p), tkline_time / 60, | |
533 | aconf->user, aconf->host, reason, oper_reason); | |
534 | ilog(L_KLINE, "K %s %d %s %s %s|%s", | |
535 | get_oper_name(source_p), tkline_time / 60, | |
536 | aconf->user, aconf->host, reason, oper_reason); | |
537 | } | |
538 | ||
539 | sendto_one_notice(source_p, ":Added temporary %d min. K-Line [%s@%s]", | |
540 | tkline_time / 60, aconf->user, aconf->host); | |
541 | } | |
542 | ||
543 | /* find_user_host() | |
544 | * | |
545 | * inputs - client placing kline, user@host, user buffer, host buffer | |
546 | * output - 0 if not ok to kline, 1 to kline i.e. if valid user host | |
547 | * side effects - | |
548 | */ | |
549 | static int | |
550 | find_user_host(struct Client *source_p, const char *userhost, char *luser, char *lhost) | |
551 | { | |
552 | char *hostp; | |
553 | ||
554 | hostp = strchr(userhost, '@'); | |
555 | ||
556 | if(hostp != NULL) /* I'm a little user@host */ | |
557 | { | |
558 | *(hostp++) = '\0'; /* short and squat */ | |
559 | if(*userhost) | |
560 | strlcpy(luser, userhost, USERLEN + 1); /* here is my user */ | |
561 | else | |
562 | strcpy(luser, "*"); | |
563 | if(*hostp) | |
564 | strlcpy(lhost, hostp, HOSTLEN + 1); /* here is my host */ | |
565 | else | |
566 | strcpy(lhost, "*"); | |
567 | } | |
568 | else | |
569 | { | |
570 | /* no '@', no '.', so its not a user@host or host, therefore | |
571 | * its a nick, which support was removed for. | |
572 | */ | |
573 | if(strchr(userhost, '.') == NULL && strchr(userhost, ':') == NULL) | |
574 | return 0; | |
575 | ||
576 | luser[0] = '*'; /* no @ found, assume its *@somehost */ | |
577 | luser[1] = '\0'; | |
578 | strlcpy(lhost, userhost, HOSTLEN + 1); | |
579 | } | |
580 | ||
581 | return 1; | |
582 | } | |
583 | ||
584 | /* valid_user_host() | |
585 | * | |
586 | * inputs - user buffer, host buffer | |
587 | * output - 0 if invalid, 1 if valid | |
588 | * side effects - | |
589 | */ | |
590 | static int | |
591 | valid_user_host(struct Client *source_p, const char *luser, const char *lhost) | |
592 | { | |
593 | /* # is invalid, as is '!' (n!u@h kline) */ | |
594 | if(strchr(lhost, '#') || strchr(luser, '#') || strchr(luser, '!')) | |
595 | { | |
596 | sendto_one_notice(source_p, ":Invalid K-Line"); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | return 1; | |
601 | } | |
602 | ||
603 | /* valid_wild_card() | |
604 | * | |
605 | * input - user buffer, host buffer | |
606 | * output - 0 if invalid, 1 if valid | |
607 | * side effects - | |
608 | */ | |
609 | static int | |
610 | valid_wild_card(struct Client *source_p, const char *luser, const char *lhost) | |
611 | { | |
612 | const char *p; | |
613 | char tmpch; | |
614 | int nonwild = 0; | |
88a2a148 | 615 | int bitlen; |
212380e3 | 616 | |
598ebb42 JT |
617 | /* user has no wildcards, always accept -- jilles */ |
618 | if (!strchr(luser, '?') && !strchr(luser, '*')) | |
619 | return 1; | |
620 | ||
212380e3 AC |
621 | /* check there are enough non wildcard chars */ |
622 | p = luser; | |
623 | while ((tmpch = *p++)) | |
624 | { | |
625 | if(!IsKWildChar(tmpch)) | |
626 | { | |
627 | /* found enough chars, return */ | |
628 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
629 | return 1; | |
630 | } | |
631 | } | |
632 | ||
633 | /* try host, as user didnt contain enough */ | |
88a2a148 JT |
634 | /* special case for cidr masks -- jilles */ |
635 | if ((p = strrchr(lhost, '/')) != NULL && IsDigit(p[1])) | |
212380e3 | 636 | { |
88a2a148 JT |
637 | bitlen = atoi(p + 1); |
638 | /* much like non-cidr for ipv6, rather arbitrary for ipv4 */ | |
639 | if (bitlen > 0 && bitlen >= (strchr(lhost, ':') ? 4 * (ConfigFileEntry.min_nonwildcard - nonwild) : 6 - 2 * nonwild)) | |
640 | return 1; | |
641 | } | |
642 | else | |
643 | { | |
644 | p = lhost; | |
645 | while ((tmpch = *p++)) | |
646 | { | |
647 | if(!IsKWildChar(tmpch)) | |
648 | if(++nonwild >= ConfigFileEntry.min_nonwildcard) | |
649 | return 1; | |
650 | } | |
212380e3 AC |
651 | } |
652 | ||
653 | sendto_one_notice(source_p, | |
654 | ":Please include at least %d non-wildcard " | |
655 | "characters with the user@host", | |
656 | ConfigFileEntry.min_nonwildcard); | |
657 | return 0; | |
658 | } | |
659 | ||
660 | /* | |
661 | * valid_comment | |
662 | * inputs - pointer to client | |
663 | * - pointer to comment | |
664 | * output - 0 if no valid comment, 1 if valid | |
665 | * side effects - NONE | |
666 | */ | |
667 | static int | |
668 | valid_comment(struct Client *source_p, char *comment) | |
669 | { | |
670 | if(strchr(comment, '"')) | |
671 | { | |
672 | sendto_one_notice(source_p, ":Invalid character '\"' in comment"); | |
673 | return 0; | |
674 | } | |
675 | ||
61569b65 JT |
676 | if(strlen(comment) > BANREASONLEN) |
677 | comment[BANREASONLEN] = '\0'; | |
212380e3 AC |
678 | |
679 | return 1; | |
680 | } | |
681 | ||
682 | /* already_placed_kline() | |
683 | * | |
684 | * inputs - source to notify, user@host to check, tkline time | |
685 | * outputs - 1 if a perm kline or a tkline when a tkline is being | |
686 | * set exists, else 0 | |
687 | * side effects - notifies source_p kline exists | |
688 | */ | |
689 | /* Note: This currently works if the new K-line is a special case of an | |
690 | * existing K-line, but not the other way round. To do that we would | |
691 | * have to walk the hash and check every existing K-line. -A1kmm. | |
692 | */ | |
693 | static int | |
694 | already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int tkline) | |
695 | { | |
7f27e316 | 696 | const char *reason, *p; |
212380e3 AC |
697 | struct irc_sockaddr_storage iphost, *piphost; |
698 | struct ConfItem *aconf; | |
7f27e316 JT |
699 | int t, bits; |
700 | ||
701 | aconf = find_exact_conf_by_address(lhost, CONF_KILL, luser); | |
702 | if (aconf == NULL && ConfigFileEntry.non_redundant_klines) | |
212380e3 | 703 | { |
7f27e316 JT |
704 | bits = 0; |
705 | if((t = parse_netmask(lhost, (struct sockaddr *)&iphost, &bits)) != HM_HOST) | |
212380e3 AC |
706 | { |
707 | #ifdef IPV6 | |
708 | if(t == HM_IPV6) | |
709 | t = AF_INET6; | |
710 | else | |
711 | #endif | |
712 | t = AF_INET; | |
713 | ||
714 | piphost = &iphost; | |
715 | } | |
716 | else | |
717 | piphost = NULL; | |
718 | ||
7f27e316 JT |
719 | aconf = find_conf_by_address(lhost, NULL, NULL, (struct sockaddr *)piphost, CONF_KILL, t, luser); |
720 | if (aconf != NULL) | |
212380e3 | 721 | { |
7f27e316 JT |
722 | /* The above was really a lookup of a single IP, |
723 | * so check if the new kline is wider than the | |
724 | * existing one. | |
725 | * -- jilles | |
726 | */ | |
727 | p = strchr(aconf->host, '/'); | |
728 | if (bits > 0 && (p == NULL || bits < atoi(p + 1))) | |
729 | aconf = NULL; | |
730 | } | |
731 | } | |
732 | if (aconf != NULL) | |
733 | { | |
734 | /* setting a tkline, or existing one is perm */ | |
735 | if(tkline || ((aconf->flags & CONF_FLAGS_TEMPORARY) == 0)) | |
736 | { | |
737 | reason = aconf->passwd ? aconf->passwd : "<No Reason>"; | |
738 | ||
739 | sendto_one_notice(source_p, | |
740 | ":[%s@%s] already K-Lined by [%s@%s] - %s", | |
741 | luser, lhost, aconf->user, | |
742 | aconf->host, reason); | |
743 | return 1; | |
212380e3 AC |
744 | } |
745 | } | |
746 | ||
747 | return 0; | |
748 | } | |
749 | ||
750 | /* remove_permkline_match() | |
751 | * | |
752 | * hunts for a permanent kline, and removes it. | |
753 | */ | |
754 | static void | |
40a1d446 | 755 | remove_permkline_match(struct Client *source_p, struct ConfItem *aconf) |
212380e3 AC |
756 | { |
757 | FILE *in, *out; | |
758 | int pairme = 0; | |
759 | int error_on_write = NO; | |
760 | char buf[BUFSIZE]; | |
761 | char matchbuf[BUFSIZE]; | |
762 | char temppath[BUFSIZE]; | |
763 | const char *filename; | |
40a1d446 | 764 | const char *host, *user; |
212380e3 AC |
765 | mode_t oldumask; |
766 | int matchlen; | |
767 | ||
40a1d446 JT |
768 | host = aconf->host; |
769 | user = aconf->user; | |
770 | ||
212380e3 AC |
771 | ircsnprintf(temppath, sizeof(temppath), |
772 | "%s.tmp", ConfigFileEntry.klinefile); | |
773 | ||
774 | filename = get_conf_name(KLINE_TYPE); | |
775 | ||
776 | if((in = fopen(filename, "r")) == 0) | |
777 | { | |
778 | sendto_one_notice(source_p, ":Cannot open %s", filename); | |
779 | return; | |
780 | } | |
781 | ||
782 | oldumask = umask(0); | |
783 | if((out = fopen(temppath, "w")) == 0) | |
784 | { | |
785 | sendto_one_notice(source_p, ":Cannot open %s", temppath); | |
786 | fclose(in); | |
787 | umask(oldumask); | |
788 | return; | |
789 | } | |
790 | ||
791 | umask(oldumask); | |
792 | ||
793 | snprintf(matchbuf, sizeof(matchbuf), "\"%s\",\"%s\"", user, host); | |
794 | matchlen = strlen(matchbuf); | |
795 | ||
796 | while (fgets(buf, sizeof(buf), in)) | |
797 | { | |
798 | if(error_on_write) | |
799 | break; | |
800 | ||
801 | if(!strncasecmp(buf, matchbuf, matchlen)) | |
802 | { | |
803 | pairme++; | |
804 | break; | |
805 | } | |
806 | else | |
807 | error_on_write = flush_write(source_p, out, buf, temppath); | |
808 | } | |
809 | ||
810 | /* we dropped out of the loop early because we found a match, | |
811 | * to drop into this somewhat faster loop as we presume we'll never | |
812 | * have two matching klines --anfl | |
813 | */ | |
814 | if(pairme && !error_on_write) | |
815 | { | |
816 | while(fgets(buf, sizeof(buf), in)) | |
817 | { | |
818 | if(error_on_write) | |
819 | break; | |
820 | ||
821 | error_on_write = flush_write(source_p, out, buf, temppath); | |
822 | } | |
823 | } | |
824 | ||
825 | fclose(in); | |
826 | if (fclose(out)) | |
827 | error_on_write = YES; | |
828 | ||
829 | /* The result of the rename should be checked too... oh well */ | |
830 | /* If there was an error on a write above, then its been reported | |
831 | * and I am not going to trash the original kline /conf file | |
832 | */ | |
833 | if(error_on_write) | |
834 | { | |
835 | sendto_one_notice(source_p, ":Couldn't write temp kline file, aborted"); | |
836 | return; | |
837 | } | |
838 | else if(!pairme) | |
839 | { | |
40a1d446 | 840 | sendto_one_notice(source_p, ":Cannot find K-Line for %s@%s in file", |
212380e3 AC |
841 | user, host); |
842 | ||
843 | if(temppath != NULL) | |
844 | (void) unlink(temppath); | |
845 | ||
846 | return; | |
847 | } | |
848 | ||
849 | if (rename(temppath, filename)) | |
850 | { | |
851 | sendto_one_notice(source_p, ":Couldn't rename temp file, aborted"); | |
852 | return; | |
853 | } | |
212380e3 AC |
854 | |
855 | sendto_one_notice(source_p, ":K-Line for [%s@%s] is removed", | |
856 | user, host); | |
857 | ||
858 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
859 | "%s has removed the K-Line for: [%s@%s]", | |
860 | get_oper_name(source_p), user, host); | |
861 | ||
862 | ilog(L_KLINE, "UK %s %s %s", | |
863 | get_oper_name(source_p), user, host); | |
40a1d446 | 864 | |
35f6f850 | 865 | remove_reject_mask(aconf->user, aconf->host); |
40a1d446 JT |
866 | delete_one_address_conf(aconf->host, aconf); |
867 | ||
212380e3 AC |
868 | return; |
869 | } | |
870 | ||
871 | /* | |
872 | * flush_write() | |
873 | * | |
874 | * inputs - pointer to client structure of oper requesting unkline | |
875 | * - out is the file descriptor | |
876 | * - buf is the buffer to write | |
877 | * - ntowrite is the expected number of character to be written | |
878 | * - temppath is the temporary file name to be written | |
879 | * output - YES for error on write | |
880 | * - NO for success | |
881 | * side effects - if successful, the buf is written to output file | |
882 | * if a write failure happesn, and the file pointed to | |
883 | * by temppath, if its non NULL, is removed. | |
884 | * | |
885 | * The idea here is, to be as robust as possible when writing to the | |
886 | * kline file. | |
887 | * | |
888 | * -Dianora | |
889 | */ | |
890 | ||
891 | static int | |
892 | flush_write(struct Client *source_p, FILE * out, const char *buf, const char *temppath) | |
893 | { | |
894 | int error_on_write = (fputs(buf, out) < 0) ? YES : NO; | |
895 | ||
896 | if(error_on_write) | |
897 | { | |
898 | sendto_one_notice(source_p, ":Unable to write to %s", | |
899 | temppath); | |
900 | if(temppath != NULL) | |
901 | (void) unlink(temppath); | |
902 | } | |
903 | return (error_on_write); | |
904 | } | |
905 | ||
906 | /* remove_temp_kline() | |
907 | * | |
908 | * inputs - username, hostname to unkline | |
909 | * outputs - | |
910 | * side effects - tries to unkline anything that matches | |
911 | */ | |
912 | static int | |
d922dded | 913 | remove_temp_kline(struct Client *source_p, struct ConfItem *aconf) |
212380e3 | 914 | { |
212380e3 | 915 | dlink_node *ptr; |
212380e3 AC |
916 | int i; |
917 | ||
212380e3 AC |
918 | for (i = 0; i < LAST_TEMP_TYPE; i++) |
919 | { | |
920 | DLINK_FOREACH(ptr, temp_klines[i].head) | |
921 | { | |
40a1d446 | 922 | if (aconf == ptr->data) |
212380e3 | 923 | { |
d922dded JT |
924 | sendto_one_notice(source_p, |
925 | ":Un-klined [%s@%s] from temporary k-lines", | |
926 | aconf->user, aconf->host); | |
927 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
928 | "%s has removed the temporary K-Line for: [%s@%s]", | |
929 | get_oper_name(source_p), aconf->user, aconf->host); | |
930 | ||
931 | ilog(L_KLINE, "UK %s %s %s", | |
932 | get_oper_name(source_p), | |
933 | aconf->user, aconf->host); | |
40a1d446 | 934 | dlinkDestroy(ptr, &temp_klines[i]); |
35f6f850 | 935 | remove_reject_mask(aconf->user, aconf->host); |
40a1d446 JT |
936 | delete_one_address_conf(aconf->host, aconf); |
937 | return YES; | |
212380e3 | 938 | } |
212380e3 AC |
939 | } |
940 | } | |
941 | ||
942 | return NO; | |
943 | } |