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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 | #include "stdinc.h" | |
32 | #include "rb_lib.h" | |
33 | #include "client.h" | |
34 | #include "s_conf.h" | |
35 | #include "logger.h" | |
36 | #include "match.h" | |
37 | #include "bandbi.h" | |
38 | #include "parse.h" | |
39 | #include "channel.h" | |
40 | #include "hostmask.h" | |
41 | #include "hash.h" | |
42 | #include "s_newconf.h" | |
43 | #include "reject.h" | |
44 | #include "send.h" | |
45 | #include "ircd.h" | |
46 | #include "msg.h" /* XXX: MAXPARA */ | |
47 | #include "operhash.h" | |
48 | ||
49 | static void | |
50 | bandb_handle_failure(rb_helper *helper, char **parv, int parc) __attribute__((noreturn)); | |
51 | ||
52 | static char bandb_add_letter[LAST_BANDB_TYPE] = { | |
53 | 'K', 'D', 'X', 'R' | |
54 | }; | |
55 | ||
56 | rb_dlink_list bandb_pending; | |
57 | ||
58 | static rb_helper *bandb_helper; | |
59 | static int start_bandb(void); | |
60 | ||
61 | static void bandb_parse(rb_helper *); | |
62 | static void bandb_restart_cb(rb_helper *); | |
63 | static char *bandb_path; | |
64 | ||
65 | void | |
66 | init_bandb(void) | |
67 | { | |
68 | if(start_bandb()) | |
69 | { | |
70 | ilog(L_MAIN, "Unable to start bandb helper: %s", strerror(errno)); | |
71 | exit(0); | |
72 | } | |
73 | } | |
74 | ||
75 | ||
76 | static int | |
77 | start_bandb(void) | |
78 | { | |
79 | char fullpath[PATH_MAX + 1]; | |
80 | ||
81 | rb_setenv("BANDB_DBPATH", ircd_paths[IRCD_PATH_BANDB], 1); | |
82 | if(bandb_path == NULL) | |
83 | { | |
84 | snprintf(fullpath, sizeof(fullpath), "%s/bandb", ircd_paths[IRCD_PATH_LIBEXEC]); | |
85 | ||
86 | if(access(fullpath, X_OK) == -1) | |
87 | { | |
88 | snprintf(fullpath, sizeof(fullpath), "%s/bin/bandb", ConfigFileEntry.dpath); | |
89 | ||
90 | if(access(fullpath, X_OK) == -1) | |
91 | { | |
92 | ilog(L_MAIN, | |
93 | "Unable to execute bandb in %s or %s/bin", | |
94 | ircd_paths[IRCD_PATH_LIBEXEC], ConfigFileEntry.dpath); | |
95 | return 0; | |
96 | } | |
97 | } | |
98 | bandb_path = rb_strdup(fullpath); | |
99 | } | |
100 | ||
101 | ||
102 | bandb_helper = rb_helper_start("bandb", bandb_path, bandb_parse, bandb_restart_cb); | |
103 | ||
104 | if(bandb_helper == NULL) | |
105 | { | |
106 | ilog(L_MAIN, "Unable to start bandb: %s", strerror(errno)); | |
107 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "Unable to start bandb: %s", | |
108 | strerror(errno)); | |
109 | return 1; | |
110 | } | |
111 | ||
112 | rb_helper_run(bandb_helper); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | void | |
117 | bandb_add(bandb_type type, struct Client *source_p, const char *mask1, | |
118 | const char *mask2, const char *reason, const char *oper_reason, int perm) | |
119 | { | |
120 | if(bandb_helper == NULL) | |
121 | return; | |
122 | ||
123 | static char buf[BUFSIZE]; | |
124 | ||
125 | snprintf(buf, sizeof(buf), "%c %s ", bandb_add_letter[type], mask1); | |
126 | ||
127 | if(!EmptyString(mask2)) | |
128 | rb_snprintf_append(buf, sizeof(buf), "%s ", mask2); | |
129 | ||
130 | rb_snprintf_append(buf, sizeof(buf), "%s %ld %d :%s", | |
131 | get_oper_name(source_p), (long int)rb_current_time(), perm, reason); | |
132 | ||
133 | if(!EmptyString(oper_reason)) | |
134 | rb_snprintf_append(buf, sizeof(buf), "|%s", oper_reason); | |
135 | ||
136 | rb_helper_write(bandb_helper, "%s", buf); | |
137 | } | |
138 | ||
139 | static char bandb_del_letter[LAST_BANDB_TYPE] = { | |
140 | 'k', 'd', 'x', 'r' | |
141 | }; | |
142 | ||
143 | void | |
144 | bandb_del(bandb_type type, const char *mask1, const char *mask2) | |
145 | { | |
146 | if(bandb_helper == NULL) | |
147 | return; | |
148 | ||
149 | static char buf[BUFSIZE]; | |
150 | ||
151 | buf[0] = '\0'; | |
152 | ||
153 | rb_snprintf_append(buf, sizeof(buf), "%c %s", bandb_del_letter[type], mask1); | |
154 | ||
155 | if(!EmptyString(mask2)) | |
156 | rb_snprintf_append(buf, sizeof(buf), " %s", mask2); | |
157 | ||
158 | rb_helper_write(bandb_helper, "%s", buf); | |
159 | } | |
160 | ||
161 | static void | |
162 | bandb_handle_ban(char *parv[], int parc) | |
163 | { | |
164 | struct ConfItem *aconf; | |
165 | char *p; | |
166 | int para = 1; | |
167 | ||
168 | aconf = make_conf(); | |
169 | aconf->port = 0; | |
170 | ||
171 | if(parv[0][0] == 'K') | |
172 | aconf->user = rb_strdup(parv[para++]); | |
173 | ||
174 | aconf->host = rb_strdup(parv[para++]); | |
175 | aconf->info.oper = operhash_add(parv[para++]); | |
176 | ||
177 | switch (parv[0][0]) | |
178 | { | |
179 | case 'K': | |
180 | aconf->status = CONF_KILL; | |
181 | break; | |
182 | ||
183 | case 'D': | |
184 | aconf->status = CONF_DLINE; | |
185 | break; | |
186 | ||
187 | case 'X': | |
188 | aconf->status = CONF_XLINE; | |
189 | break; | |
190 | ||
191 | case 'R': | |
192 | if(IsChannelName(aconf->host)) | |
193 | aconf->status = CONF_RESV_CHANNEL; | |
194 | else | |
195 | aconf->status = CONF_RESV_NICK; | |
196 | ||
197 | break; | |
198 | } | |
199 | ||
200 | if((p = strchr(parv[para], '|'))) | |
201 | { | |
202 | *p++ = '\0'; | |
203 | aconf->spasswd = rb_strdup(p); | |
204 | } | |
205 | ||
206 | aconf->passwd = rb_strdup(parv[para]); | |
207 | ||
208 | rb_dlinkAddAlloc(aconf, &bandb_pending); | |
209 | } | |
210 | ||
211 | static int | |
212 | bandb_check_kline(struct ConfItem *aconf) | |
213 | { | |
214 | struct rb_sockaddr_storage daddr; | |
215 | struct ConfItem *kconf = NULL; | |
216 | int aftype; | |
217 | const char *p; | |
218 | ||
219 | aftype = parse_netmask(aconf->host, &daddr, NULL); | |
220 | ||
221 | if(aftype != HM_HOST) | |
222 | { | |
223 | if(aftype == HM_IPV6) | |
224 | aftype = AF_INET6; | |
225 | else | |
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 | int bits; | |
257 | ||
258 | if(!parse_netmask(aconf->host, &daddr, &bits)) | |
259 | return 0; | |
260 | ||
261 | return 1; | |
262 | } | |
263 | ||
264 | static int | |
265 | bandb_check_xline(struct ConfItem *aconf) | |
266 | { | |
267 | struct ConfItem *xconf; | |
268 | /* XXX perhaps convert spaces to \s? -- jilles */ | |
269 | ||
270 | xconf = find_xline_mask(aconf->host); | |
271 | if(xconf != NULL && !(xconf->flags & CONF_FLAGS_TEMPORARY)) | |
272 | return 0; | |
273 | ||
274 | return 1; | |
275 | } | |
276 | ||
277 | static int | |
278 | bandb_check_resv_channel(struct ConfItem *aconf) | |
279 | { | |
280 | const char *p; | |
281 | ||
282 | if(hash_find_resv(aconf->host) || strlen(aconf->host) > CHANNELLEN) | |
283 | return 0; | |
284 | ||
285 | for(p = aconf->host; *p; p++) | |
286 | { | |
287 | if(!IsChanChar(*p)) | |
288 | return 0; | |
289 | } | |
290 | ||
291 | return 1; | |
292 | } | |
293 | ||
294 | static int | |
295 | bandb_check_resv_nick(struct ConfItem *aconf) | |
296 | { | |
297 | if(!clean_resv_nick(aconf->host)) | |
298 | return 0; | |
299 | ||
300 | if(find_nick_resv(aconf->host)) | |
301 | return 0; | |
302 | ||
303 | return 1; | |
304 | } | |
305 | ||
306 | static void | |
307 | bandb_handle_clear(void) | |
308 | { | |
309 | rb_dlink_node *ptr, *next_ptr; | |
310 | ||
311 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head) | |
312 | { | |
313 | free_conf(ptr->data); | |
314 | rb_dlinkDestroy(ptr, &bandb_pending); | |
315 | } | |
316 | } | |
317 | ||
318 | static void | |
319 | bandb_handle_finish(void) | |
320 | { | |
321 | struct ConfItem *aconf; | |
322 | rb_dlink_node *ptr, *next_ptr; | |
323 | ||
324 | clear_out_address_conf(AC_BANDB); | |
325 | clear_s_newconf_bans(); | |
326 | ||
327 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, bandb_pending.head) | |
328 | { | |
329 | aconf = ptr->data; | |
330 | ||
331 | rb_dlinkDestroy(ptr, &bandb_pending); | |
332 | ||
333 | switch (aconf->status) | |
334 | { | |
335 | case CONF_KILL: | |
336 | if(bandb_check_kline(aconf)) | |
337 | add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf); | |
338 | else | |
339 | free_conf(aconf); | |
340 | ||
341 | break; | |
342 | ||
343 | case CONF_DLINE: | |
344 | if(bandb_check_dline(aconf)) | |
345 | add_conf_by_address(aconf->host, CONF_DLINE, aconf->user, NULL, aconf); | |
346 | else | |
347 | free_conf(aconf); | |
348 | ||
349 | break; | |
350 | ||
351 | case CONF_XLINE: | |
352 | if(bandb_check_xline(aconf)) | |
353 | rb_dlinkAddAlloc(aconf, &xline_conf_list); | |
354 | else | |
355 | free_conf(aconf); | |
356 | ||
357 | break; | |
358 | ||
359 | case CONF_RESV_CHANNEL: | |
360 | if(bandb_check_resv_channel(aconf)) | |
361 | add_to_resv_hash(aconf->host, aconf); | |
362 | else | |
363 | free_conf(aconf); | |
364 | ||
365 | break; | |
366 | ||
367 | case CONF_RESV_NICK: | |
368 | if(bandb_check_resv_nick(aconf)) | |
369 | rb_dlinkAddAlloc(aconf, &resv_conf_list); | |
370 | else | |
371 | free_conf(aconf); | |
372 | ||
373 | break; | |
374 | } | |
375 | } | |
376 | ||
377 | check_banned_lines(); | |
378 | } | |
379 | ||
380 | static void | |
381 | bandb_handle_failure(rb_helper *helper, char **parv, int parc) | |
382 | { | |
383 | if(server_state_foreground) | |
384 | fprintf(stderr, "bandb - bandb failure: %s\n", parv[1]); | |
385 | ||
386 | ilog(L_MAIN, "bandb - bandb failure: %s", parv[1]); | |
387 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "bandb - bandb failure: %s", parv[1]); | |
388 | exit(1); | |
389 | } | |
390 | ||
391 | static void | |
392 | bandb_parse(rb_helper *helper) | |
393 | { | |
394 | static char buf[READBUF_SIZE]; | |
395 | char *parv[MAXPARA]; | |
396 | int len, parc; | |
397 | ||
398 | while((len = rb_helper_read(helper, buf, sizeof(buf)))) | |
399 | { | |
400 | parc = rb_string_to_array(buf, parv, sizeof(parv)); | |
401 | ||
402 | if(parc < 1) | |
403 | continue; | |
404 | ||
405 | switch (parv[0][0]) | |
406 | { | |
407 | case '!': | |
408 | bandb_handle_failure(helper, parv, parc); | |
409 | break; | |
410 | case 'K': | |
411 | case 'D': | |
412 | case 'X': | |
413 | case 'R': | |
414 | bandb_handle_ban(parv, parc); | |
415 | break; | |
416 | ||
417 | case 'C': | |
418 | bandb_handle_clear(); | |
419 | break; | |
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_NETWIDE, | |
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 | } |