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1 | /* gline.c - Gline database | |
2 | * Copyright 2000-2004 srvx Development Team | |
3 | * | |
4 | * This file is part of x3. | |
5 | * | |
6 | * x3 is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with srvx; if not, write to the Free Software Foundation, | |
18 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
19 | */ | |
20 | ||
21 | #include "heap.h" | |
22 | #include "helpfile.h" | |
23 | #include "log.h" | |
24 | #include "saxdb.h" | |
25 | #include "timeq.h" | |
26 | #include "gline.h" | |
27 | ||
28 | #ifdef HAVE_SYS_SOCKET_H | |
29 | #include <sys/socket.h> | |
30 | #endif | |
31 | #ifdef HAVE_NETINET_IN_H | |
32 | #include <netinet/in.h> | |
33 | #endif | |
34 | #ifdef HAVE_ARPA_INET_H | |
35 | #include <arpa/inet.h> | |
36 | #endif | |
37 | #ifdef HAVE_NETDB_H | |
38 | #include <netdb.h> | |
39 | #endif | |
40 | ||
41 | #define KEY_REASON "reason" | |
42 | #define KEY_EXPIRES "expires" | |
43 | #define KEY_ISSUER "issuer" | |
44 | #define KEY_ISSUED "issued" | |
45 | ||
46 | static heap_t gline_heap; /* key: expiry time, data: struct gline_entry* */ | |
47 | static dict_t gline_dict; /* key: target, data: struct gline_entry* */ | |
48 | ||
49 | static int | |
50 | gline_comparator(const void *a, const void *b) | |
51 | { | |
52 | const struct gline *ga=a, *gb=b; | |
53 | return ga->expires - gb->expires; | |
54 | } | |
55 | ||
56 | static void | |
57 | free_gline_from_dict(void *data) | |
58 | { | |
59 | struct gline *ent = data; | |
60 | free(ent->issuer); | |
61 | free(ent->target); | |
62 | free(ent->reason); | |
63 | free(ent); | |
64 | } | |
65 | ||
66 | static void | |
67 | free_gline(struct gline *ent) | |
68 | { | |
69 | dict_remove(gline_dict, ent->target); | |
70 | } | |
71 | ||
72 | static int | |
73 | gline_for_p(UNUSED_ARG(void *key), void *data, void *extra) | |
74 | { | |
75 | struct gline *ge = data; | |
76 | return !irccasecmp(ge->target, extra); | |
77 | } | |
78 | ||
79 | static int | |
80 | delete_gline_for_p(UNUSED_ARG(void *key), void *data, void *extra) | |
81 | { | |
82 | struct gline *ge = data; | |
83 | ||
84 | if (!irccasecmp(ge->target, extra)) { | |
85 | free_gline(ge); | |
86 | return 1; | |
87 | } else { | |
88 | return 0; | |
89 | } | |
90 | } | |
91 | ||
92 | static void | |
93 | gline_expire(UNUSED_ARG(void *data)) | |
94 | { | |
95 | time_t stopped; | |
96 | void *wraa; | |
97 | ||
98 | stopped = 0; | |
99 | while (heap_size(gline_heap)) { | |
100 | heap_peek(gline_heap, 0, &wraa); | |
101 | stopped = ((struct gline*)wraa)->expires; | |
102 | if (stopped > now) | |
103 | break; | |
104 | heap_pop(gline_heap); | |
105 | free_gline(wraa); | |
106 | } | |
107 | if (heap_size(gline_heap)) | |
108 | timeq_add(stopped, gline_expire, NULL); | |
109 | } | |
110 | ||
111 | int | |
112 | gline_remove(const char *target, int announce) | |
113 | { | |
114 | int res = dict_find(gline_dict, target, NULL) ? 1 : 0; | |
115 | if (heap_remove_pred(gline_heap, delete_gline_for_p, (char*)target)) { | |
116 | void *argh; | |
117 | struct gline *new_first; | |
118 | heap_peek(gline_heap, 0, &argh); | |
119 | if (argh) { | |
120 | new_first = argh; | |
121 | timeq_del(0, gline_expire, 0, TIMEQ_IGNORE_WHEN|TIMEQ_IGNORE_DATA); | |
122 | timeq_add(new_first->expires, gline_expire, 0); | |
123 | } | |
124 | } | |
125 | if (announce) | |
126 | irc_ungline(target); | |
127 | return res; | |
128 | } | |
129 | ||
130 | struct gline * | |
131 | gline_add(const char *issuer, const char *target, unsigned long duration, const char *reason, time_t issued, int announce, int silent) | |
132 | { | |
133 | struct gline *ent; | |
134 | struct gline *prev_first; | |
135 | void *argh; | |
136 | ||
137 | heap_peek(gline_heap, 0, &argh); | |
138 | prev_first = argh; | |
139 | ent = dict_find(gline_dict, target, NULL); | |
140 | if (ent) { | |
141 | heap_remove_pred(gline_heap, gline_for_p, (char*)target); | |
142 | if (ent->expires < (time_t)(now + duration)) | |
143 | ent->expires = now + duration; | |
144 | } else { | |
145 | ent = malloc(sizeof(*ent)); | |
146 | ent->issued = issued; | |
147 | ent->issuer = strdup(issuer); | |
148 | ent->target = strdup(target); | |
149 | ent->expires = now + duration; | |
150 | ent->reason = strdup(reason); | |
151 | dict_insert(gline_dict, ent->target, ent); | |
152 | } | |
153 | heap_insert(gline_heap, ent, ent); | |
154 | if (!prev_first || (ent->expires < prev_first->expires)) { | |
155 | timeq_del(0, gline_expire, 0, TIMEQ_IGNORE_WHEN|TIMEQ_IGNORE_DATA); | |
156 | timeq_add(ent->expires, gline_expire, 0); | |
157 | } | |
158 | if (announce) | |
159 | irc_gline(NULL, ent, silent); | |
160 | return ent; | |
161 | } | |
162 | ||
163 | static char * | |
164 | gline_alternate_target(const char *target) | |
165 | { | |
166 | const char *hostname; | |
167 | ||
168 | /* If no host part, bail. */ | |
169 | if (!(hostname = strchr(target, '@'))) | |
170 | return NULL; | |
171 | /* If host part contains wildcards, bail. */ | |
172 | if (hostname[strcspn(hostname, "*?/")]) | |
173 | return NULL; | |
174 | #if 0 | |
175 | irc_in_addr_t in; /* move this to the right place */ | |
176 | if (irc_pton(&in, NULL, hostname+1)) { | |
177 | if (getnameinfo(/*TODO*/)) | |
178 | return NULL; | |
179 | } else if (!getaddrinfo(/*TODO*/)) { | |
180 | } else return NULL; | |
181 | #else | |
182 | return NULL; | |
183 | #endif | |
184 | } | |
185 | ||
186 | struct gline * | |
187 | gline_find(const char *target) | |
188 | { | |
189 | struct gline *res; | |
190 | dict_iterator_t it; | |
191 | char *alt_target; | |
192 | ||
193 | res = dict_find(gline_dict, target, NULL); | |
194 | if (res) | |
195 | return res; | |
196 | /* Stock ircu requires BADCHANs to match exactly. */ | |
197 | if ((target[0] == '#') || (target[0] == '&')) | |
198 | return NULL; | |
199 | else if (target[strcspn(target, "*?")]) { | |
200 | /* Wildcard: do an obnoxiously long search. */ | |
201 | for (it = dict_first(gline_dict); it; it = iter_next(it)) { | |
202 | res = iter_data(it); | |
203 | if (match_ircglob(target, res->target)) | |
204 | return res; | |
205 | } | |
206 | } | |
207 | /* See if we can resolve the hostname part of the mask. */ | |
208 | if ((alt_target = gline_alternate_target(target))) { | |
209 | res = gline_find(alt_target); | |
210 | free(alt_target); | |
211 | return res; | |
212 | } | |
213 | return NULL; | |
214 | } | |
215 | ||
216 | static int | |
217 | gline_refresh_helper(UNUSED_ARG(void *key), void *data, void *extra) | |
218 | { | |
219 | struct gline *ge = data; | |
220 | irc_gline(extra, ge, 0); | |
221 | return 0; | |
222 | } | |
223 | ||
224 | void | |
225 | gline_refresh_server(struct server *srv) | |
226 | { | |
227 | heap_remove_pred(gline_heap, gline_refresh_helper, srv); | |
228 | } | |
229 | ||
230 | void | |
231 | gline_refresh_all(void) | |
232 | { | |
233 | heap_remove_pred(gline_heap, gline_refresh_helper, 0); | |
234 | } | |
235 | ||
236 | unsigned int | |
237 | gline_count(void) | |
238 | { | |
239 | return dict_size(gline_dict); | |
240 | } | |
241 | ||
242 | static int | |
243 | gline_add_record(const char *key, void *data, UNUSED_ARG(void *extra)) | |
244 | { | |
245 | struct record_data *rd = data; | |
246 | const char *issuer, *reason, *dstr; | |
247 | time_t issued, expiration; | |
248 | ||
249 | if (!(reason = database_get_data(rd->d.object, KEY_REASON, RECDB_QSTRING))) { | |
250 | log_module(MAIN_LOG, LOG_ERROR, "Missing reason for gline %s", key); | |
251 | return 0; | |
252 | } | |
253 | if (!(dstr = database_get_data(rd->d.object, KEY_EXPIRES, RECDB_QSTRING))) { | |
254 | log_module(MAIN_LOG, LOG_ERROR, "Missing expiration for gline %s", key); | |
255 | return 0; | |
256 | } | |
257 | expiration = strtoul(dstr, NULL, 0); | |
258 | if ((dstr = database_get_data(rd->d.object, KEY_ISSUED, RECDB_QSTRING))) { | |
259 | issued = strtoul(dstr, NULL, 0); | |
260 | } else { | |
261 | issued = now; | |
262 | } | |
263 | if (!(issuer = database_get_data(rd->d.object, KEY_ISSUER, RECDB_QSTRING))) { | |
264 | issuer = "<unknown>"; | |
265 | } | |
266 | if (expiration > now) | |
267 | gline_add(issuer, key, expiration - now, reason, issued, 0, 0); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int | |
272 | gline_saxdb_read(struct dict *db) | |
273 | { | |
274 | return dict_foreach(db, gline_add_record, 0) != NULL; | |
275 | } | |
276 | ||
277 | static int | |
278 | gline_write_entry(UNUSED_ARG(void *key), void *data, void *extra) | |
279 | { | |
280 | struct gline *ent = data; | |
281 | struct saxdb_context *ctx = extra; | |
282 | ||
283 | saxdb_start_record(ctx, ent->target, 0); | |
284 | saxdb_write_int(ctx, KEY_EXPIRES, ent->expires); | |
285 | saxdb_write_int(ctx, KEY_ISSUED, ent->issued); | |
286 | saxdb_write_string(ctx, KEY_REASON, ent->reason); | |
287 | saxdb_write_string(ctx, KEY_ISSUER, ent->issuer); | |
288 | saxdb_end_record(ctx); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static int | |
293 | gline_saxdb_write(struct saxdb_context *ctx) | |
294 | { | |
295 | heap_remove_pred(gline_heap, gline_write_entry, ctx); | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static void | |
300 | gline_db_cleanup(void) | |
301 | { | |
302 | heap_delete(gline_heap); | |
303 | dict_delete(gline_dict); | |
304 | } | |
305 | ||
306 | void | |
307 | gline_init(void) | |
308 | { | |
309 | gline_heap = heap_new(gline_comparator); | |
310 | gline_dict = dict_new(); | |
311 | dict_set_free_data(gline_dict, free_gline_from_dict); | |
312 | saxdb_register("gline", gline_saxdb_read, gline_saxdb_write); | |
313 | reg_exit_func(gline_db_cleanup); | |
314 | } | |
315 | ||
316 | struct gline_discrim * | |
317 | gline_discrim_create(struct userNode *user, struct userNode *src, unsigned int argc, char *argv[]) | |
318 | { | |
319 | unsigned int i; | |
320 | struct gline_discrim *discrim; | |
321 | ||
322 | discrim = calloc(1, sizeof(*discrim)); | |
323 | discrim->max_issued = now; | |
324 | discrim->limit = 50; | |
325 | ||
326 | for (i=0; i<argc; i++) { | |
327 | if (i + 2 > argc) { | |
328 | send_message(user, src, "MSG_MISSING_PARAMS", argv[i]); | |
329 | goto fail; | |
330 | } else if (!irccasecmp(argv[i], "mask") || !irccasecmp(argv[i], "host")) { | |
331 | if (!irccasecmp(argv[++i], "exact")) | |
332 | discrim->target_mask_type = EXACT; | |
333 | else if (!irccasecmp(argv[i], "subset")) | |
334 | discrim->target_mask_type = SUBSET; | |
335 | else if (!irccasecmp(argv[i], "superset")) | |
336 | discrim->target_mask_type = SUPERSET; | |
337 | else | |
338 | discrim->target_mask_type = SUBSET, i--; | |
339 | if (++i == argc) { | |
340 | send_message(user, src, "MSG_MISSING_PARAMS", argv[i-1]); | |
341 | goto fail; | |
342 | } | |
343 | if (!is_gline(argv[i]) && !IsChannelName(argv[i])) { | |
344 | send_message(user, src, "MSG_INVALID_GLINE", argv[i]); | |
345 | goto fail; | |
346 | } | |
347 | discrim->target_mask = argv[i]; | |
348 | discrim->alt_target_mask = gline_alternate_target(discrim->target_mask); | |
349 | } else if (!irccasecmp(argv[i], "limit")) | |
350 | discrim->limit = strtoul(argv[++i], NULL, 0); | |
351 | else if (!irccasecmp(argv[i], "reason")) | |
352 | discrim->reason_mask = argv[++i]; | |
353 | else if (!irccasecmp(argv[i], "issuer")) | |
354 | discrim->issuer_mask = argv[++i]; | |
355 | else if (!irccasecmp(argv[i], "after")) | |
356 | discrim->min_expire = now + ParseInterval(argv[++i]); | |
357 | else if (!irccasecmp(argv[i], "before")) | |
358 | discrim->max_issued = now - ParseInterval(argv[++i]); | |
359 | else { | |
360 | send_message(user, src, "MSG_INVALID_CRITERIA", argv[i]); | |
361 | goto fail; | |
362 | } | |
363 | } | |
364 | return discrim; | |
365 | fail: | |
366 | free(discrim->alt_target_mask); | |
367 | free(discrim); | |
368 | return NULL; | |
369 | } | |
370 | ||
371 | struct gline_search { | |
372 | struct gline_discrim *discrim; | |
373 | gline_search_func func; | |
374 | void *data; | |
375 | unsigned int hits; | |
376 | }; | |
377 | ||
378 | static int | |
379 | gline_discrim_match(struct gline *gline, struct gline_discrim *discrim) | |
380 | { | |
381 | if ((discrim->issuer_mask && !match_ircglob(gline->issuer, discrim->issuer_mask)) | |
382 | || (discrim->reason_mask && !match_ircglob(gline->reason, discrim->reason_mask)) | |
383 | || (discrim->target_mask | |
384 | && (((discrim->target_mask_type == SUBSET) | |
385 | && !match_ircglobs(discrim->target_mask, gline->target) | |
386 | && (!discrim->alt_target_mask | |
387 | || !match_ircglobs(discrim->alt_target_mask, gline->target))) | |
388 | || ((discrim->target_mask_type == EXACT) | |
389 | && irccasecmp(discrim->target_mask, gline->target) | |
390 | && (!discrim->alt_target_mask | |
391 | || !irccasecmp(discrim->alt_target_mask, gline->target))) | |
392 | || ((discrim->target_mask_type == SUPERSET) | |
393 | && !match_ircglobs(gline->target, discrim->target_mask) | |
394 | && (!discrim->alt_target_mask | |
395 | || !match_ircglobs(discrim->alt_target_mask, gline->target))))) | |
396 | || (discrim->max_issued < gline->issued) | |
397 | || (discrim->min_expire > gline->expires)) { | |
398 | return 0; | |
399 | } | |
400 | return 1; | |
401 | } | |
402 | ||
403 | static int | |
404 | gline_search_helper(UNUSED_ARG(void *key), void *data, void *extra) | |
405 | { | |
406 | struct gline *gline = data; | |
407 | struct gline_search *search = extra; | |
408 | ||
409 | if (gline_discrim_match(gline, search->discrim) | |
410 | && (search->hits++ < search->discrim->limit)) { | |
411 | search->func(gline, search->data); | |
412 | } | |
413 | return 0; | |
414 | } | |
415 | ||
416 | unsigned int | |
417 | gline_discrim_search(struct gline_discrim *discrim, gline_search_func gsf, void *data) | |
418 | { | |
419 | struct gline_search search; | |
420 | search.discrim = discrim; | |
421 | search.func = gsf; | |
422 | search.data = data; | |
423 | search.hits = 0; | |
424 | heap_remove_pred(gline_heap, gline_search_helper, &search); | |
425 | return search.hits; | |
426 | } |