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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 | */ | |
24 | ||
25 | #include "stdinc.h" | |
26 | #include "channel.h" | |
27 | #include "class.h" | |
28 | #include "client.h" | |
29 | #include "common.h" | |
30 | #include "match.h" | |
31 | #include "ircd.h" | |
32 | #include "hostmask.h" | |
33 | #include "numeric.h" | |
34 | #include "s_conf.h" | |
35 | #include "s_newconf.h" | |
36 | #include "logger.h" | |
37 | #include "send.h" | |
38 | #include "hash.h" | |
39 | #include "s_serv.h" | |
40 | #include "msg.h" | |
41 | #include "parse.h" | |
42 | #include "modules.h" | |
43 | #include "bandbi.h" | |
44 | #include "operhash.h" | |
45 | ||
46 | static int mo_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
47 | static int me_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
48 | static int mo_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
49 | static int me_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
50 | ||
51 | struct Message dline_msgtab = { | |
52 | "DLINE", 0, 0, 0, 0, | |
53 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_dline, 4}, {mo_dline, 2}} | |
54 | }; | |
55 | ||
56 | struct Message undline_msgtab = { | |
57 | "UNDLINE", 0, 0, 0, 0, | |
58 | {mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_undline, 2}, {mo_undline, 2}} | |
59 | }; | |
60 | ||
61 | mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL }; | |
62 | ||
63 | DECLARE_MODULE_AV2(dline, NULL, NULL, dline_clist, NULL, NULL, NULL, NULL, NULL); | |
64 | ||
65 | static int remove_temp_dline(struct ConfItem *); | |
66 | static int apply_dline(struct Client *, const char *, int, char *); | |
67 | static int apply_undline(struct Client *, const char *); | |
68 | ||
69 | /* mo_dline() | |
70 | * | |
71 | * parv[1] - dline to add | |
72 | * parv[2] - reason | |
73 | */ | |
74 | static int | |
75 | mo_dline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
76 | { | |
77 | char def[] = "No Reason"; | |
78 | const char *dlhost; | |
79 | char *reason = def; | |
80 | char cidr_form_host[HOSTLEN + 1]; | |
81 | int tdline_time = 0; | |
82 | const char *target_server = NULL; | |
83 | int loc = 1; | |
84 | ||
85 | if(!IsOperK(source_p)) | |
86 | { | |
87 | sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline"); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | if((tdline_time = valid_temp_time(parv[loc])) >= 0) | |
92 | loc++; | |
93 | ||
94 | dlhost = parv[loc]; | |
95 | rb_strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host)); | |
96 | loc++; | |
97 | ||
98 | /* would break the protocol */ | |
99 | if (*dlhost == ':') | |
100 | { | |
101 | sendto_one_notice(source_p, ":Invalid D-Line"); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | if(parc >= loc + 2 && !irccmp(parv[loc], "ON")) | |
106 | { | |
107 | if(!IsOperRemoteBan(source_p)) | |
108 | { | |
109 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
110 | me.name, source_p->name, "remoteban"); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | target_server = parv[loc + 1]; | |
115 | loc += 2; | |
116 | } | |
117 | ||
118 | if(parc >= loc + 1 && !EmptyString(parv[loc])) | |
119 | reason = LOCAL_COPY(parv[loc]); | |
120 | ||
121 | if(target_server != NULL) | |
122 | { | |
123 | sendto_match_servs(source_p, target_server, | |
124 | CAP_ENCAP, NOCAPS, | |
125 | "ENCAP %s DLINE %d %s :%s", | |
126 | target_server, tdline_time, dlhost, reason); | |
127 | ||
128 | if(!match(target_server, me.name)) | |
129 | return 0; | |
130 | } | |
131 | ||
132 | apply_dline(source_p, dlhost, tdline_time, reason); | |
133 | ||
134 | check_dlines(); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* mo_undline() | |
139 | * | |
140 | * parv[1] = dline to remove | |
141 | */ | |
142 | static int | |
143 | mo_undline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
144 | { | |
145 | const char *cidr; | |
146 | const char *target_server = NULL; | |
147 | ||
148 | if(!IsOperK(source_p)) | |
149 | { | |
150 | sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline"); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | cidr = parv[1]; | |
155 | ||
156 | if(parc >= 4 && !irccmp(parv[2], "ON")) | |
157 | { | |
158 | if(!IsOperRemoteBan(source_p)) | |
159 | { | |
160 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
161 | me.name, source_p->name, "remoteban"); | |
162 | return 0; | |
163 | } | |
164 | ||
165 | target_server = parv[3]; | |
166 | sendto_match_servs(source_p, target_server, | |
167 | CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr); | |
168 | ||
169 | if(!match(target_server, me.name)) | |
170 | return 0; | |
171 | } | |
172 | ||
173 | apply_undline(source_p, cidr); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static int | |
179 | me_dline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
180 | { | |
181 | int tdline_time = atoi(parv[1]); | |
182 | /* Since this is coming over a server link, assume that the originating | |
183 | * server did the relevant permission/sanity checks... | |
184 | */ | |
185 | ||
186 | if(!IsPerson(source_p)) | |
187 | return 0; | |
188 | ||
189 | if(!find_shared_conf(source_p->username, source_p->host, | |
190 | source_p->servptr->name, | |
191 | tdline_time > 0 ? SHARED_TDLINE : SHARED_PDLINE)) | |
192 | return 0; | |
193 | ||
194 | apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3])); | |
195 | ||
196 | check_dlines(); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | static int | |
201 | me_undline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv) | |
202 | { | |
203 | if(!IsPerson(source_p)) | |
204 | return 0; | |
205 | ||
206 | if(!find_shared_conf(source_p->username, source_p->host, | |
207 | source_p->servptr->name, SHARED_UNDLINE)) | |
208 | return 0; | |
209 | ||
210 | apply_undline(source_p, parv[1]); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int | |
216 | apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason) | |
217 | { | |
218 | struct ConfItem *aconf; | |
219 | char *oper_reason; | |
220 | struct rb_sockaddr_storage daddr; | |
221 | int t = AF_INET, ty, b; | |
222 | const char *creason; | |
223 | ||
224 | ty = parse_netmask(dlhost, &daddr, &b); | |
225 | if(ty == HM_HOST) | |
226 | { | |
227 | sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name); | |
228 | return 0; | |
229 | } | |
230 | #ifdef RB_IPV6 | |
231 | if(ty == HM_IPV6) | |
232 | t = AF_INET6; | |
233 | else | |
234 | #endif | |
235 | t = AF_INET; | |
236 | ||
237 | /* This means dlines wider than /16 cannot be set remotely */ | |
238 | if(IsOperAdmin(source_p)) | |
239 | { | |
240 | if(b < 8) | |
241 | { | |
242 | sendto_one_notice(source_p, | |
243 | ":For safety, bitmasks less than 8 require conf access."); | |
244 | return 0; | |
245 | } | |
246 | } | |
247 | else | |
248 | { | |
249 | if(b < 16) | |
250 | { | |
251 | sendto_one_notice(source_p, | |
252 | ":Dline bitmasks less than 16 are for admins only."); | |
253 | return 0; | |
254 | } | |
255 | } | |
256 | ||
257 | if(ConfigFileEntry.non_redundant_klines) | |
258 | { | |
259 | if((aconf = find_dline((struct sockaddr *) &daddr, t)) != NULL) | |
260 | { | |
261 | int bx; | |
262 | parse_netmask(aconf->host, NULL, &bx); | |
263 | if(b >= bx) | |
264 | { | |
265 | creason = aconf->passwd ? aconf->passwd : "<No Reason>"; | |
266 | if(IsConfExemptKline(aconf)) | |
267 | sendto_one(source_p, | |
268 | ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s", | |
269 | me.name, source_p->name, dlhost, aconf->host, | |
270 | creason); | |
271 | else | |
272 | sendto_one(source_p, | |
273 | ":%s NOTICE %s :[%s] already D-lined by [%s] - %s", | |
274 | me.name, source_p->name, dlhost, aconf->host, | |
275 | creason); | |
276 | return 0; | |
277 | } | |
278 | } | |
279 | } | |
280 | ||
281 | rb_set_time(); | |
282 | ||
283 | aconf = make_conf(); | |
284 | aconf->status = CONF_DLINE; | |
285 | aconf->created = rb_current_time(); | |
286 | aconf->host = rb_strdup(dlhost); | |
287 | aconf->passwd = rb_strdup(reason); | |
288 | aconf->info.oper = operhash_add(get_oper_name(source_p)); | |
289 | ||
290 | if(strlen(reason) > BANREASONLEN) | |
291 | reason[BANREASONLEN] = '\0'; | |
292 | ||
293 | /* Look for an oper reason */ | |
294 | if((oper_reason = strchr(reason, '|')) != NULL) | |
295 | { | |
296 | *oper_reason = '\0'; | |
297 | oper_reason++; | |
298 | ||
299 | if(!EmptyString(oper_reason)) | |
300 | aconf->spasswd = rb_strdup(oper_reason); | |
301 | } | |
302 | ||
303 | if(tdline_time > 0) | |
304 | { | |
305 | aconf->hold = rb_current_time() + tdline_time; | |
306 | add_temp_dline(aconf); | |
307 | ||
308 | if(EmptyString(oper_reason)) | |
309 | { | |
310 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
311 | "%s added temporary %d min. D-Line for [%s] [%s]", | |
312 | get_oper_name(source_p), tdline_time / 60, | |
313 | aconf->host, reason); | |
314 | ilog(L_KLINE, "D %s %d %s %s", | |
315 | get_oper_name(source_p), tdline_time / 60, aconf->host, reason); | |
316 | } | |
317 | else | |
318 | { | |
319 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
320 | "%s added temporary %d min. D-Line for [%s] [%s|%s]", | |
321 | get_oper_name(source_p), tdline_time / 60, | |
322 | aconf->host, reason, oper_reason); | |
323 | ilog(L_KLINE, "D %s %d %s %s|%s", | |
324 | get_oper_name(source_p), tdline_time / 60, | |
325 | aconf->host, reason, oper_reason); | |
326 | } | |
327 | ||
328 | sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]", | |
329 | me.name, source_p->name, tdline_time / 60, aconf->host); | |
330 | } | |
331 | else | |
332 | { | |
333 | add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf); | |
334 | ||
335 | bandb_add(BANDB_DLINE, source_p, aconf->host, NULL, | |
336 | reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0); | |
337 | ||
338 | if(EmptyString(oper_reason)) | |
339 | { | |
340 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
341 | "%s added D-Line for [%s] [%s]", | |
342 | get_oper_name(source_p), aconf->host, reason); | |
343 | ilog(L_KLINE, "D %s 0 %s %s", | |
344 | get_oper_name(source_p), aconf->host, reason); | |
345 | } | |
346 | else | |
347 | { | |
348 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
349 | "%s added D-Line for [%s] [%s|%s]", | |
350 | get_oper_name(source_p), aconf->host, reason, oper_reason); | |
351 | ilog(L_KLINE, "D %s 0 %s %s|%s", | |
352 | get_oper_name(source_p), | |
353 | aconf->host, reason, oper_reason); | |
354 | } | |
355 | } | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
360 | static int | |
361 | apply_undline(struct Client *source_p, const char *cidr) | |
362 | { | |
363 | char buf[BUFSIZE]; | |
364 | struct ConfItem *aconf; | |
365 | ||
366 | if(parse_netmask(cidr, NULL, NULL) == HM_HOST) | |
367 | { | |
368 | sendto_one_notice(source_p, ":Invalid D-Line"); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL); | |
373 | if(aconf == NULL) | |
374 | { | |
375 | sendto_one_notice(source_p, ":No D-Line for %s", cidr); | |
376 | return 0; | |
377 | } | |
378 | ||
379 | rb_strlcpy(buf, aconf->host, sizeof buf); | |
380 | if(remove_temp_dline(aconf)) | |
381 | { | |
382 | sendto_one(source_p, | |
383 | ":%s NOTICE %s :Un-dlined [%s] from temporary D-lines", | |
384 | me.name, source_p->name, buf); | |
385 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
386 | "%s has removed the temporary D-Line for: [%s]", | |
387 | get_oper_name(source_p), buf); | |
388 | ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | bandb_del(BANDB_DLINE, aconf->host, NULL); | |
393 | ||
394 | sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name, | |
395 | aconf->host); | |
396 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s has removed the D-Line for: [%s]", | |
397 | get_oper_name(source_p), aconf->host); | |
398 | ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host); | |
399 | delete_one_address_conf(aconf->host, aconf); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | /* remove_temp_dline() | |
405 | * | |
406 | * inputs - confitem to undline | |
407 | * outputs - | |
408 | * side effects - tries to undline anything that matches | |
409 | */ | |
410 | static int | |
411 | remove_temp_dline(struct ConfItem *aconf) | |
412 | { | |
413 | rb_dlink_node *ptr; | |
414 | int i; | |
415 | ||
416 | for(i = 0; i < LAST_TEMP_TYPE; i++) | |
417 | { | |
418 | RB_DLINK_FOREACH(ptr, temp_dlines[i].head) | |
419 | { | |
420 | if(aconf == ptr->data) | |
421 | { | |
422 | rb_dlinkDestroy(ptr, &temp_dlines[i]); | |
423 | delete_one_address_conf(aconf->host, aconf); | |
424 | return YES; | |
425 | } | |
426 | } | |
427 | } | |
428 | ||
429 | return NO; | |
430 | } |