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2c9a27c4 WP |
1 | /* src/bandbi.c |
2 | * An interface to the ban db. | |
3 | * | |
4 | * Copyright (C) 2006 Lee Hardy <lee -at- leeh.co.uk> | |
5 | * Copyright (C) 2006 ircd-ratbox development team | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions are | |
9 | * met: | |
10 | * | |
11 | * 1.Redistributions of source code must retain the above copyright notice, | |
12 | * this list of conditions and the following disclaimer. | |
13 | * 2.Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3.The name of the author may not be used to endorse or promote products | |
17 | * derived from this software without specific prior written permission. | |
18 | * | |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
21 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
22 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
23 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
24 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
25 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
27 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
28 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
29 | * POSSIBILITY OF SUCH DAMAGE. | |
30 | * | |
31 | * $Id$ | |
32 | */ | |
33 | #include "stdinc.h" | |
34 | #include "ratbox_lib.h" | |
35 | #include "client.h" | |
36 | #include "s_conf.h" | |
37 | #include "logger.h" | |
38 | #include "match.h" | |
39 | #include "bandbi.h" | |
40 | #include "parse.h" | |
41 | #include "channel.h" | |
42 | #include "hostmask.h" | |
43 | #include "hash.h" | |
44 | #include "s_newconf.h" | |
45 | #include "reject.h" | |
46 | #include "send.h" | |
47 | #include "ircd.h" | |
48 | #include "msg.h" /* XXX: MAXPARA */ | |
49 | ||
50 | static char bandb_add_letter[LAST_BANDB_TYPE] = { | |
51 | 'K', 'D', 'X', 'R' | |
52 | }; | |
53 | ||
54 | rb_dlink_list bandb_pending; | |
55 | ||
56 | static rb_helper *bandb_helper; | |
57 | static int start_bandb(void); | |
58 | ||
59 | static void bandb_parse(rb_helper *); | |
60 | static void bandb_restart_cb(rb_helper *); | |
61 | static char *bandb_path; | |
62 | ||
63 | void | |
64 | init_bandb(void) | |
65 | { | |
66 | if(start_bandb()) | |
67 | { | |
68 | ilog(L_MAIN, "Unable to start bandb helper: %s", strerror(errno)); | |
69 | exit(0); | |
70 | } | |
71 | } | |
72 | ||
73 | ||
74 | static int | |
75 | start_bandb(void) | |
76 | { | |
77 | char fullpath[PATH_MAX + 1]; | |
78 | #ifdef _WIN32 | |
79 | const char *suffix = ".exe"; | |
80 | #else | |
81 | const char *suffix = ""; | |
82 | #endif | |
83 | ||
84 | rb_setenv("BANDB_DPATH", ConfigFileEntry.dpath, 1); | |
85 | if(bandb_path == NULL) | |
86 | { | |
87 | rb_snprintf(fullpath, sizeof(fullpath), "%s/bandb%s", BINPATH, suffix); | |
88 | ||
89 | if(access(fullpath, X_OK) == -1) | |
90 | { | |
91 | rb_snprintf(fullpath, sizeof(fullpath), "%s/bin/bandb%s", | |
92 | ConfigFileEntry.dpath, suffix); | |
93 | ||
94 | if(access(fullpath, X_OK) == -1) | |
95 | { | |
96 | ilog(L_MAIN, | |
97 | "Unable to execute bandb in %s or %s/bin", | |
98 | BINPATH, ConfigFileEntry.dpath); | |
99 | return 0; | |
100 | } | |
101 | } | |
102 | bandb_path = rb_strdup(fullpath); | |
103 | } | |
104 | ||
105 | ||
106 | bandb_helper = rb_helper_start("bandb", bandb_path, bandb_parse, bandb_restart_cb); | |
107 | ||
108 | if(bandb_helper == NULL) | |
109 | { | |
110 | ilog(L_MAIN, "Unable to start bandb: %s", strerror(errno)); | |
111 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "Unable to start bandb: %s", | |
112 | strerror(errno)); | |
113 | return 1; | |
114 | } | |
115 | ||
116 | rb_helper_run(bandb_helper); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | void | |
121 | bandb_add(bandb_type type, struct Client *source_p, const char *mask1, | |
122 | const char *mask2, const char *reason, const char *oper_reason, int perm) | |
123 | { | |
124 | static char buf[BUFSIZE]; | |
125 | ||
126 | rb_snprintf(buf, sizeof(buf), "%c %s ", bandb_add_letter[type], mask1); | |
127 | ||
128 | if(!EmptyString(mask2)) | |
129 | rb_snprintf_append(buf, sizeof(buf), "%s ", mask2); | |
130 | ||
131 | rb_snprintf_append(buf, sizeof(buf), "%s %ld %d :%s", | |
132 | get_oper_name(source_p), (long int)rb_current_time(), perm, reason); | |
133 | ||
134 | if(!EmptyString(oper_reason)) | |
135 | rb_snprintf_append(buf, sizeof(buf), "|%s", oper_reason); | |
136 | ||
137 | rb_helper_write(bandb_helper, "%s", buf); | |
138 | } | |
139 | ||
140 | static char bandb_del_letter[LAST_BANDB_TYPE] = { | |
141 | 'k', 'd', 'x', 'r' | |
142 | }; | |
143 | ||
144 | void | |
145 | bandb_del(bandb_type type, const char *mask1, const char *mask2) | |
146 | { | |
147 | static char buf[BUFSIZE]; | |
148 | ||
149 | buf[0] = '\0'; | |
150 | ||
151 | rb_snprintf_append(buf, sizeof(buf), "%c %s", bandb_del_letter[type], mask1); | |
152 | ||
153 | if(!EmptyString(mask2)) | |
154 | rb_snprintf_append(buf, sizeof(buf), " %s", mask2); | |
155 | ||
156 | rb_helper_write(bandb_helper, "%s", buf); | |
157 | } | |
158 | ||
159 | static void | |
160 | bandb_handle_ban(char *parv[], int parc) | |
161 | { | |
162 | struct ConfItem *aconf; | |
163 | char *p; | |
164 | int para = 1; | |
165 | ||
166 | aconf = make_conf(); | |
167 | aconf->port = 0; | |
168 | ||
169 | if(parv[0][0] == 'K') | |
170 | aconf->user = rb_strdup(parv[para++]); | |
171 | ||
172 | aconf->host = rb_strdup(parv[para++]); | |
173 | aconf->passwd = rb_strdup(parv[para++]); | |
174 | ||
175 | switch (parv[0][0]) | |
176 | { | |
177 | case 'K': | |
178 | aconf->status = CONF_KILL; | |
179 | break; | |
180 | ||
181 | case 'D': | |
182 | aconf->status = CONF_DLINE; | |
183 | break; | |
184 | ||
185 | case 'X': | |
186 | aconf->status = CONF_XLINE; | |
187 | break; | |
188 | ||
189 | case 'R': | |
190 | if(IsChannelName(aconf->host)) | |
191 | aconf->status = CONF_RESV_CHANNEL; | |
192 | else | |
193 | aconf->status = CONF_RESV_NICK; | |
194 | ||
195 | break; | |
196 | } | |
197 | ||
198 | if((p = strchr(parv[para], '|'))) | |
199 | { | |
200 | *p++ = '\0'; | |
201 | aconf->spasswd = rb_strdup(p); | |
202 | } | |
203 | ||
204 | aconf->passwd = rb_strdup(parv[para]); | |
205 | ||
206 | rb_dlinkAddAlloc(aconf, &bandb_pending); | |
207 | } | |
208 | ||
209 | static int | |
210 | bandb_check_kline(struct ConfItem *aconf) | |
211 | { | |
212 | struct rb_sockaddr_storage daddr; | |
213 | struct ConfItem *kconf = NULL; | |
214 | int aftype; | |
215 | const char *p; | |
216 | ||
217 | aftype = parse_netmask(aconf->host, (struct sockaddr *)&daddr, NULL); | |
218 | ||
219 | if(aftype != HM_HOST) | |
220 | { | |
221 | #ifdef RB_IPV6 | |
222 | if(aftype == HM_IPV6) | |
223 | aftype = AF_INET6; | |
224 | else | |
225 | #endif | |
226 | aftype = AF_INET; | |
227 | ||
228 | kconf = find_conf_by_address(aconf->host, NULL, NULL, (struct sockaddr *)&daddr, | |
229 | CONF_KILL, aftype, aconf->user, NULL); | |
230 | } | |
231 | else | |
232 | kconf = find_conf_by_address(aconf->host, NULL, NULL, NULL, CONF_KILL, 0, aconf->user, NULL); | |
233 | ||
234 | if(kconf && ((kconf->flags & CONF_FLAGS_TEMPORARY) == 0)) | |
235 | return 0; | |
236 | ||
237 | for(p = aconf->user; *p; p++) | |
238 | { | |
239 | if(!IsUserChar(*p) && !IsKWildChar(*p)) | |
240 | return 0; | |
241 | } | |
242 | ||
243 | for(p = aconf->host; *p; p++) | |
244 | { | |
245 | if(!IsHostChar(*p) && !IsKWildChar(*p)) | |
246 | return 0; | |
247 | } | |
248 | ||
249 | return 1; | |
250 | } | |
251 | ||
252 | static int | |
253 | bandb_check_dline(struct ConfItem *aconf) | |
254 | { | |
255 | struct rb_sockaddr_storage daddr; | |
256 | /* struct ConfItem *dconf; */ | |
257 | int bits; | |
258 | ||
259 | if(!parse_netmask(aconf->host, (struct sockaddr *)&daddr, &bits)) | |
260 | return 0; | |
261 | ||
262 | return 1; | |
263 | } | |
264 | ||
265 | static int | |
266 | bandb_check_xline(struct ConfItem *aconf) | |
267 | { | |
268 | struct ConfItem *xconf; | |
269 | /* XXX perhaps convert spaces to \s? -- jilles */ | |
270 | ||
271 | xconf = find_xline_mask(aconf->host); | |
272 | if(xconf != NULL && !(xconf->flags & CONF_FLAGS_TEMPORARY)) | |
273 | return 0; | |
274 | ||
275 | return 1; | |
276 | } | |
277 | ||
278 | static int | |
279 | bandb_check_resv_channel(struct ConfItem *aconf) | |
280 | { | |
281 | const char *p; | |
282 | ||
283 | if(hash_find_resv(aconf->host) || strlen(aconf->host) > CHANNELLEN) | |
284 | return 0; | |
285 | ||
286 | for(p = aconf->host; *p; p++) | |
287 | { | |
288 | if(!IsChanChar(*p)) | |
289 | return 0; | |
290 | } | |
291 | ||
292 | return 1; | |
293 | } | |
294 | ||
295 | static int | |
296 | bandb_check_resv_nick(struct ConfItem *aconf) | |
297 | { | |
298 | if(!clean_resv_nick(aconf->host)) | |
299 | return 0; | |
300 | ||
301 | if(find_nick_resv(aconf->host)) | |
302 | return 0; | |
303 | ||
304 | return 1; | |
305 | } | |
306 | ||
307 | static void | |
308 | bandb_handle_clear(void) | |
309 | { | |
310 | rb_dlink_node *ptr, *next_ptr; | |
311 | ||
312 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head) | |
313 | { | |
314 | free_conf(ptr->data); | |
315 | rb_dlinkDestroy(ptr, &bandb_pending); | |
316 | } | |
317 | } | |
318 | ||
319 | static void | |
320 | bandb_handle_finish(void) | |
321 | { | |
322 | struct ConfItem *aconf; | |
323 | rb_dlink_node *ptr, *next_ptr; | |
324 | ||
325 | clear_out_address_conf_bans(); | |
326 | clear_s_newconf_bans(); | |
327 | ||
328 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head) | |
329 | { | |
330 | aconf = ptr->data; | |
331 | ||
332 | rb_dlinkDestroy(ptr, &bandb_pending); | |
333 | ||
334 | switch (aconf->status) | |
335 | { | |
336 | case CONF_KILL: | |
337 | if(bandb_check_kline(aconf)) | |
338 | add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf); | |
339 | else | |
340 | free_conf(aconf); | |
341 | ||
342 | break; | |
343 | ||
344 | case CONF_DLINE: | |
345 | if(bandb_check_dline(aconf)) | |
346 | add_conf_by_address(aconf->host, CONF_DLINE, aconf->user, NULL, aconf); | |
347 | else | |
348 | free_conf(aconf); | |
349 | ||
350 | break; | |
351 | ||
352 | case CONF_XLINE: | |
353 | if(bandb_check_xline(aconf)) | |
354 | rb_dlinkAddAlloc(aconf, &xline_conf_list); | |
355 | else | |
356 | free_conf(aconf); | |
357 | ||
358 | break; | |
359 | ||
360 | case CONF_RESV_CHANNEL: | |
361 | if(bandb_check_resv_channel(aconf)) | |
362 | add_to_resv_hash(aconf->host, aconf); | |
363 | else | |
364 | free_conf(aconf); | |
365 | ||
366 | break; | |
367 | ||
368 | case CONF_RESV_NICK: | |
369 | if(bandb_check_resv_nick(aconf)) | |
370 | rb_dlinkAddAlloc(aconf, &resv_conf_list); | |
371 | else | |
372 | free_conf(aconf); | |
373 | ||
374 | break; | |
375 | } | |
376 | } | |
377 | ||
378 | check_banned_lines(); | |
379 | } | |
380 | ||
381 | static void | |
382 | bandb_handle_failure(rb_helper *helper, char **parv, int parc) | |
383 | { | |
384 | if(server_state_foreground) | |
385 | fprintf(stderr, "bandb - bandb failure: %s\n", parv[1]); | |
386 | ||
387 | ilog(L_MAIN, "bandb - bandb failure: %s", parv[1]); | |
388 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "bandb - bandb failure: %s", parv[1]); | |
389 | exit(1); | |
390 | } | |
391 | ||
392 | static void | |
393 | bandb_parse(rb_helper *helper) | |
394 | { | |
395 | static char buf[READBUF_SIZE]; | |
396 | char *parv[MAXPARA + 1]; | |
397 | int len, parc; | |
398 | ||
399 | while((len = rb_helper_read(helper, buf, sizeof(buf)))) | |
400 | { | |
401 | parc = rb_string_to_array(buf, parv, MAXPARA); | |
402 | ||
403 | if(parc < 1) | |
404 | continue; | |
405 | ||
406 | switch (parv[0][0]) | |
407 | { | |
408 | case '!': | |
409 | bandb_handle_failure(helper, parv, parc); | |
410 | break; | |
411 | case 'K': | |
412 | case 'D': | |
413 | case 'X': | |
414 | case 'R': | |
415 | bandb_handle_ban(parv, parc); | |
416 | break; | |
417 | ||
418 | case 'C': | |
419 | bandb_handle_clear(); | |
420 | case 'F': | |
421 | bandb_handle_finish(); | |
422 | break; | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | void | |
428 | bandb_rehash_bans(void) | |
429 | { | |
430 | if(bandb_helper != NULL) | |
431 | rb_helper_write(bandb_helper, "L"); | |
432 | } | |
433 | ||
434 | static void | |
435 | bandb_restart_cb(rb_helper *helper) | |
436 | { | |
437 | ilog(L_MAIN, "bandb - bandb_restart_cb called, bandb helper died?"); | |
438 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
439 | "bandb - bandb_restart_cb called, bandb helper died?"); | |
440 | if(helper != NULL) | |
441 | { | |
442 | rb_helper_close(helper); | |
443 | bandb_helper = NULL; | |
444 | } | |
445 | start_bandb(); | |
446 | return; | |
447 | } |