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212380e3 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_dline.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 | * | |
61569b65 | 24 | * $Id: m_dline.c 3225 2007-03-04 23:42:55Z jilles $ |
212380e3 AC |
25 | */ |
26 | ||
27 | #include "stdinc.h" | |
212380e3 AC |
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" | |
212380e3 AC |
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" | |
6f24a013 | 46 | #include "reject.h" |
212380e3 AC |
47 | |
48 | static int mo_dline(struct Client *, struct Client *, int, const char **); | |
49 | static int mo_undline(struct Client *, struct Client *, int, const char **); | |
50 | ||
51 | struct Message dline_msgtab = { | |
52 | "DLINE", 0, 0, 0, MFLG_SLOW, | |
53 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_dline, 2}} | |
54 | }; | |
55 | struct Message undline_msgtab = { | |
56 | "UNDLINE", 0, 0, 0, MFLG_SLOW, | |
57 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_undline, 2}} | |
58 | }; | |
59 | ||
60 | mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL }; | |
61569b65 | 61 | DECLARE_MODULE_AV1(dline, NULL, NULL, dline_clist, NULL, NULL, "$Revision: 3225 $"); |
212380e3 AC |
62 | |
63 | static int valid_comment(char *comment); | |
64 | static int flush_write(struct Client *, FILE *, char *, char *); | |
6f3a09ff | 65 | static int remove_temp_dline(struct ConfItem *); |
212380e3 AC |
66 | |
67 | /* mo_dline() | |
68 | * | |
69 | * parv[1] - dline to add | |
70 | * parv[2] - reason | |
71 | */ | |
72 | static int | |
73 | mo_dline(struct Client *client_p, struct Client *source_p, | |
74 | int parc, const char *parv[]) | |
75 | { | |
76 | char def[] = "No Reason"; | |
77 | const char *dlhost; | |
78 | char *oper_reason; | |
79 | char *reason = def; | |
212380e3 AC |
80 | char cidr_form_host[HOSTLEN + 1]; |
81 | struct ConfItem *aconf; | |
82 | int bits; | |
83 | char dlbuffer[IRCD_BUFSIZE]; | |
84 | const char *current_date; | |
85 | int tdline_time = 0; | |
86 | int loc = 1; | |
87 | ||
88 | if(!IsOperK(source_p)) | |
89 | { | |
90 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
91 | me.name, source_p->name, "kline"); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | if((tdline_time = valid_temp_time(parv[loc])) >= 0) | |
96 | loc++; | |
97 | ||
98 | if(parc < loc + 1) | |
99 | { | |
100 | sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), | |
101 | me.name, source_p->name, "DLINE"); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | dlhost = parv[loc]; | |
106 | strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host)); | |
107 | ||
108 | if(!parse_netmask(dlhost, NULL, &bits)) | |
109 | { | |
110 | sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", | |
111 | me.name, source_p->name); | |
112 | return 0; | |
113 | } | |
114 | ||
115 | loc++; | |
116 | ||
117 | if(parc >= loc + 1) /* host :reason */ | |
118 | { | |
119 | if(!EmptyString(parv[loc])) | |
120 | reason = LOCAL_COPY(parv[loc]); | |
121 | ||
122 | if(!valid_comment(reason)) | |
123 | { | |
124 | sendto_one(source_p, | |
125 | ":%s NOTICE %s :Invalid character '\"' in comment", | |
126 | me.name, source_p->name); | |
127 | return 0; | |
128 | } | |
129 | } | |
130 | ||
131 | if(IsOperAdmin(source_p)) | |
132 | { | |
133 | if(bits < 8) | |
134 | { | |
135 | sendto_one(source_p, | |
136 | ":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.", | |
137 | me.name, parv[0]); | |
138 | return 0; | |
139 | } | |
140 | } | |
141 | else | |
142 | { | |
143 | if(bits < 16) | |
144 | { | |
145 | sendto_one(source_p, | |
146 | ":%s NOTICE %s :Dline bitmasks less than 16 are for admins only.", | |
147 | me.name, parv[0]); | |
148 | return 0; | |
149 | } | |
150 | } | |
151 | ||
6f24a013 VY |
152 | if(ConfigFileEntry.non_redundant_klines)\r |
153 | {\r | |
154 | struct rb_sockaddr_storage daddr;\r | |
155 | const char *creason;\r | |
156 | int t = AF_INET, ty, b;\r | |
157 | ty = parse_netmask(dlhost, (struct sockaddr *)&daddr, &b);\r | |
158 | #ifdef IPV6\r | |
159 | if(ty == HM_IPV6)\r | |
160 | t = AF_INET6;\r | |
161 | else\r | |
162 | #endif\r | |
163 | t = AF_INET;\r | |
164 | \r | |
165 | if((aconf = find_dline((struct sockaddr *)&daddr)) != NULL)\r | |
166 | {\r | |
167 | int bx;\r | |
168 | parse_netmask(aconf->host, NULL, &bx);\r | |
169 | if(b >= bx)\r | |
170 | {\r | |
171 | creason = aconf->passwd ? aconf->passwd : "<No Reason>";\r | |
172 | if(IsConfExemptKline(aconf))\r | |
173 | sendto_one_notice(source_p, \r | |
174 | ":[%s] is (E)d-lined by [%s] - %s",\r | |
175 | dlhost, aconf->host, creason);\r | |
176 | else\r | |
177 | sendto_one_notice(source_p, \r | |
178 | ":[%s] already D-lined by [%s] - %s",\r | |
179 | dlhost, aconf->host, creason);\r | |
180 | return 0;\r | |
181 | }\r | |
182 | }\r | |
212380e3 AC |
183 | } |
184 | ||
185 | set_time(); | |
186 | current_date = smalldate(); | |
187 | ||
188 | aconf = make_conf(); | |
189 | aconf->status = CONF_DLINE; | |
47a03750 | 190 | aconf->host = rb_strdup(dlhost); |
212380e3 AC |
191 | |
192 | /* Look for an oper reason */ | |
193 | if((oper_reason = strchr(reason, '|')) != NULL) | |
194 | { | |
195 | *oper_reason = '\0'; | |
196 | oper_reason++; | |
197 | ||
198 | if(!EmptyString(oper_reason)) | |
47a03750 | 199 | aconf->spasswd = rb_strdup(oper_reason); |
212380e3 AC |
200 | } |
201 | ||
202 | if(tdline_time > 0) | |
203 | { | |
7cdb0a09 | 204 | rb_snprintf(dlbuffer, sizeof(dlbuffer), |
212380e3 AC |
205 | "Temporary D-line %d min. - %s (%s)", |
206 | (int) (tdline_time / 60), reason, current_date); | |
47a03750 | 207 | aconf->passwd = rb_strdup(dlbuffer); |
e3354945 | 208 | aconf->hold = rb_current_time() + tdline_time; |
212380e3 AC |
209 | add_temp_dline(aconf); |
210 | ||
211 | if(EmptyString(oper_reason)) | |
212 | { | |
213 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
214 | "%s added temporary %d min. D-Line for [%s] [%s]", | |
215 | get_oper_name(source_p), tdline_time / 60, | |
216 | aconf->host, reason); | |
217 | ilog(L_KLINE, "D %s %d %s %s", | |
218 | get_oper_name(source_p), tdline_time / 60, | |
219 | aconf->host, reason); | |
220 | } | |
221 | else | |
222 | { | |
223 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
224 | "%s added temporary %d min. D-Line for [%s] [%s|%s]", | |
225 | get_oper_name(source_p), tdline_time / 60, | |
226 | aconf->host, reason, oper_reason); | |
227 | ilog(L_KLINE, "D %s %d %s %s|%s", | |
228 | get_oper_name(source_p), tdline_time / 60, | |
229 | aconf->host, reason, oper_reason); | |
230 | } | |
231 | ||
232 | sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]", | |
233 | me.name, source_p->name, tdline_time / 60, aconf->host); | |
234 | } | |
235 | else | |
236 | { | |
7cdb0a09 | 237 | rb_snprintf(dlbuffer, sizeof(dlbuffer), "%s (%s)", reason, current_date); |
47a03750 | 238 | aconf->passwd = rb_strdup(dlbuffer); |
212380e3 AC |
239 | add_conf_by_address(aconf->host, CONF_DLINE, NULL, aconf); |
240 | write_confitem(DLINE_TYPE, source_p, NULL, aconf->host, reason, | |
241 | oper_reason, current_date, 0); | |
242 | } | |
243 | ||
244 | check_dlines(); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | /* mo_undline() | |
249 | * | |
250 | * parv[1] = dline to remove | |
251 | */ | |
252 | static int | |
253 | mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
254 | { | |
255 | FILE *in; | |
256 | FILE *out; | |
257 | char buf[BUFSIZE], buff[BUFSIZE], temppath[BUFSIZE], *p; | |
258 | const char *filename, *found_cidr; | |
259 | const char *cidr; | |
6f3a09ff | 260 | struct ConfItem *aconf; |
212380e3 AC |
261 | int pairme = NO, error_on_write = NO; |
262 | mode_t oldumask; | |
263 | ||
7cdb0a09 | 264 | rb_snprintf(temppath, sizeof(temppath), "%s.tmp", ConfigFileEntry.dlinefile); |
212380e3 AC |
265 | |
266 | if(!IsOperUnkline(source_p)) | |
267 | { | |
268 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
269 | me.name, source_p->name, "unkline"); | |
270 | return 0; | |
271 | } | |
272 | ||
273 | cidr = parv[1]; | |
274 | ||
275 | if(parse_netmask(cidr, NULL, NULL) == HM_HOST) | |
276 | { | |
5366977b | 277 | sendto_one_notice(source_p, ":Invalid D-Line"); |
212380e3 AC |
278 | return 0; |
279 | } | |
280 | ||
6f3a09ff JT |
281 | aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL); |
282 | if(aconf == NULL) | |
283 | { | |
284 | sendto_one_notice(source_p, ":No D-Line for %s", cidr); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | strlcpy(buf, aconf->host, sizeof buf); | |
289 | if(remove_temp_dline(aconf)) | |
212380e3 AC |
290 | { |
291 | sendto_one(source_p, | |
292 | ":%s NOTICE %s :Un-dlined [%s] from temporary D-lines", | |
6f3a09ff | 293 | me.name, parv[0], buf); |
212380e3 AC |
294 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
295 | "%s has removed the temporary D-Line for: [%s]", | |
6f3a09ff JT |
296 | get_oper_name(source_p), buf); |
297 | ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf); | |
212380e3 AC |
298 | return 0; |
299 | } | |
300 | ||
301 | filename = get_conf_name(DLINE_TYPE); | |
302 | ||
303 | if((in = fopen(filename, "r")) == 0) | |
304 | { | |
305 | sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], filename); | |
306 | return 0; | |
307 | } | |
308 | ||
309 | oldumask = umask(0); | |
310 | if((out = fopen(temppath, "w")) == 0) | |
311 | { | |
312 | sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], temppath); | |
313 | fclose(in); | |
314 | umask(oldumask); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | umask(oldumask); | |
319 | ||
320 | while (fgets(buf, sizeof(buf), in)) | |
321 | { | |
322 | strlcpy(buff, buf, sizeof(buff)); | |
323 | ||
324 | if((p = strchr(buff, '\n')) != NULL) | |
325 | *p = '\0'; | |
326 | ||
327 | if((*buff == '\0') || (*buff == '#')) | |
328 | { | |
329 | if(!error_on_write) | |
330 | flush_write(source_p, out, buf, temppath); | |
331 | continue; | |
332 | } | |
333 | ||
334 | if((found_cidr = getfield(buff)) == NULL) | |
335 | { | |
336 | if(!error_on_write) | |
337 | flush_write(source_p, out, buf, temppath); | |
338 | continue; | |
339 | } | |
340 | ||
6f3a09ff | 341 | if(irccmp(found_cidr, aconf->host) == 0) |
212380e3 AC |
342 | { |
343 | pairme++; | |
344 | } | |
345 | else | |
346 | { | |
347 | if(!error_on_write) | |
348 | flush_write(source_p, out, buf, temppath); | |
349 | continue; | |
350 | } | |
351 | } | |
352 | ||
353 | fclose(in); | |
354 | if (fclose(out)) | |
355 | error_on_write = YES; | |
356 | ||
357 | if(error_on_write) | |
358 | { | |
359 | sendto_one(source_p, | |
360 | ":%s NOTICE %s :Couldn't write D-line file, aborted", | |
361 | me.name, parv[0]); | |
362 | return 0; | |
363 | } | |
364 | else if(!pairme) | |
365 | { | |
6f3a09ff JT |
366 | sendto_one_notice(source_p, ":Cannot find D-Line for %s in file", |
367 | aconf->host); | |
212380e3 AC |
368 | |
369 | if(temppath != NULL) | |
370 | (void) unlink(temppath); | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | if (rename(temppath, filename)) | |
376 | { | |
377 | sendto_one_notice(source_p, ":Couldn't rename temp file, aborted"); | |
378 | return 0; | |
379 | } | |
212380e3 | 380 | |
6f3a09ff | 381 | sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, parv[0], aconf->host); |
212380e3 | 382 | sendto_realops_snomask(SNO_GENERAL, L_ALL, |
6f3a09ff JT |
383 | "%s has removed the D-Line for: [%s]", get_oper_name(source_p), aconf->host); |
384 | ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host); | |
385 | ||
386 | delete_one_address_conf(aconf->host, aconf); | |
212380e3 AC |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
391 | /* | |
392 | * valid_comment | |
393 | * inputs - pointer to client | |
394 | * - pointer to comment | |
395 | * output - 0 if no valid comment, 1 if valid | |
396 | * side effects - NONE | |
397 | */ | |
398 | static int | |
399 | valid_comment(char *comment) | |
400 | { | |
401 | if(strchr(comment, '"')) | |
402 | return 0; | |
403 | ||
61569b65 JT |
404 | if(strlen(comment) > BANREASONLEN) |
405 | comment[BANREASONLEN] = '\0'; | |
212380e3 AC |
406 | |
407 | return 1; | |
408 | } | |
409 | ||
410 | /* | |
411 | * flush_write() | |
412 | * | |
413 | * inputs - pointer to client structure of oper requesting unkline | |
414 | * - out is the file descriptor | |
415 | * - buf is the buffer to write | |
416 | * - ntowrite is the expected number of character to be written | |
417 | * - temppath is the temporary file name to be written | |
418 | * output - YES for error on write | |
419 | * - NO for success | |
420 | * side effects - if successful, the buf is written to output file | |
421 | * if a write failure happesn, and the file pointed to | |
422 | * by temppath, if its non NULL, is removed. | |
423 | * | |
424 | * The idea here is, to be as robust as possible when writing to the | |
425 | * kline file. | |
426 | * | |
427 | * -Dianora | |
428 | */ | |
429 | static int | |
430 | flush_write(struct Client *source_p, FILE * out, char *buf, char *temppath) | |
431 | { | |
432 | int error_on_write = (fputs(buf, out) < 0) ? YES : NO; | |
433 | ||
434 | if(error_on_write) | |
435 | { | |
5366977b | 436 | sendto_one_notice(source_p, ":Unable to write to %s", temppath); |
212380e3 AC |
437 | fclose(out); |
438 | if(temppath != NULL) | |
439 | (void) unlink(temppath); | |
440 | } | |
441 | return (error_on_write); | |
442 | } | |
443 | ||
444 | /* remove_temp_dline() | |
445 | * | |
6f3a09ff | 446 | * inputs - confitem to undline |
212380e3 AC |
447 | * outputs - |
448 | * side effects - tries to undline anything that matches | |
449 | */ | |
450 | static int | |
6f3a09ff | 451 | remove_temp_dline(struct ConfItem *aconf) |
212380e3 | 452 | { |
5b96d9a6 | 453 | rb_dlink_node *ptr; |
212380e3 AC |
454 | int i; |
455 | ||
212380e3 AC |
456 | for (i = 0; i < LAST_TEMP_TYPE; i++) |
457 | { | |
5b96d9a6 | 458 | RB_DLINK_FOREACH(ptr, temp_dlines[i].head) |
212380e3 | 459 | { |
6f3a09ff | 460 | if (aconf == ptr->data) |
212380e3 | 461 | { |
555ac41f | 462 | rb_dlinkDestroy(ptr, &temp_dlines[i]); |
212380e3 AC |
463 | delete_one_address_conf(aconf->host, aconf); |
464 | return YES; | |
465 | } | |
466 | } | |
467 | } | |
468 | ||
469 | return NO; | |
470 | } |