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1 | #include <stdlib.h> | |
2 | #include <stdarg.h> | |
3 | #include <stdio.h> | |
4 | #include <string.h> | |
5 | #include <strings.h> | |
6 | #include "../core/hooks.h" | |
7 | #include "../core/config.h" | |
8 | #include "../core/error.h" | |
9 | #include "../control/control.h" | |
10 | #include "../lib/version.h" | |
11 | #include "../lib/sha1.h" | |
12 | #include "../lib/hmac.h" | |
13 | #include "../lib/irc_string.h" | |
14 | #include "../core/schedule.h" | |
15 | #include "../server/server.h" | |
16 | #include "../xsb/xsb.h" | |
17 | #include "trusts.h" | |
18 | ||
19 | MODULE_VERSION(""); | |
20 | ||
21 | static int syncing, synced; | |
22 | static sstring *smasterserver; | |
23 | ||
24 | static unsigned int curlineno, totallines; | |
25 | static SHA1_CTX s; | |
26 | ||
27 | void trusts_replication_createtables(void); | |
28 | void trusts_replication_swap(void); | |
29 | void trusts_replication_complete(int); | |
30 | ||
31 | static int masterserver(void *source); | |
32 | ||
33 | static void __abandonreplication(const char *fn, int line, char *error, ...) { | |
34 | va_list ap; | |
35 | char buf[512], buf2[600]; | |
36 | ||
37 | va_start(ap, error); | |
38 | vsnprintf(buf, sizeof(buf), error, ap); | |
39 | va_end(ap); | |
40 | ||
41 | snprintf(buf2, sizeof(buf2), "Error replicating (function: %s, line: %d): %s", fn, line, buf); | |
42 | ||
43 | Error("trusts_slave", ERR_ERROR, "%s", buf2); | |
44 | ||
45 | syncing = synced = 0; | |
46 | ||
47 | controlwall(NO_DEVELOPER, NL_TRUSTS, "Warning: %s", buf2); | |
48 | } | |
49 | ||
50 | #define abandonreplication(x, ...) __abandonreplication(__FUNCTION__, __LINE__, x , # __VA_ARGS__) | |
51 | ||
52 | void trusts_replication_complete(int error) { | |
53 | if(error) { | |
54 | abandonreplication("final replication stage: error %d", error); | |
55 | return; | |
56 | } | |
57 | Error("trusts_slave", ERR_INFO, "Replication complete!"); | |
58 | ||
59 | if(!trusts_loaddb()) { | |
60 | abandonreplication("couldn't load database"); | |
61 | return; | |
62 | } | |
63 | ||
64 | synced = 1; | |
65 | } | |
66 | ||
67 | static char *extractline(char *buf, int reset, int update, int final) { | |
68 | unsigned char n = '\n'; | |
69 | int chars = 0; | |
70 | unsigned int lineno, id; | |
71 | static unsigned int curid; | |
72 | ||
73 | if(sscanf(buf, "%u %u %n", &id, &lineno, &chars) != 2) { | |
74 | abandonreplication("bad number for sscanf result"); | |
75 | return NULL; | |
76 | } | |
77 | ||
78 | if(chars <= 0) { | |
79 | abandonreplication("bad number of characters"); | |
80 | return NULL; | |
81 | } | |
82 | ||
83 | if(reset && (lineno != 1)) { | |
84 | abandonreplication("bad initial line number"); | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | if(update) { | |
89 | if(reset) { | |
90 | curlineno = 2; | |
91 | curid = id; | |
92 | SHA1Init(&s); | |
93 | } else { | |
94 | /* will happen if two are sent at once, but that's ok */ | |
95 | if(id != curid) | |
96 | return NULL; | |
97 | ||
98 | if(lineno != curlineno) { | |
99 | abandonreplication("unexpected line number (%u vs. %u)", lineno, curlineno); | |
100 | return NULL; | |
101 | } | |
102 | if(lineno > totallines) { | |
103 | abandonreplication("too many lines"); | |
104 | return NULL; | |
105 | } | |
106 | ||
107 | curlineno++; | |
108 | ||
109 | } | |
110 | ||
111 | if(!final) { | |
112 | SHA1Update(&s, (unsigned char *)buf, strlen(buf)); | |
113 | SHA1Update(&s, &n, 1); | |
114 | } | |
115 | } | |
116 | ||
117 | return &buf[chars]; | |
118 | } | |
119 | ||
120 | /* trinit id lineno force totallines */ | |
121 | static int xsb_trinit(void *source, int argc, char **argv) { | |
122 | char *buf; | |
123 | unsigned int forced; | |
124 | ||
125 | if(!masterserver(source)) | |
126 | return CMD_ERROR; | |
127 | ||
128 | if(argc < 1) { | |
129 | abandonreplication("bad number of args"); | |
130 | return CMD_ERROR; | |
131 | } | |
132 | ||
133 | buf = extractline(argv[0], 1, 0, 1); | |
134 | if(!buf) | |
135 | return CMD_ERROR; | |
136 | ||
137 | if((sscanf(buf, "%u %u", &forced, &totallines) != 2)) { | |
138 | abandonreplication("bad number for sscanf result"); | |
139 | return CMD_ERROR; | |
140 | } | |
141 | ||
142 | if(totallines < 2) { | |
143 | abandonreplication("bad number of lines"); | |
144 | return CMD_ERROR; | |
145 | } | |
146 | ||
147 | if(!forced && synced) | |
148 | return CMD_OK; | |
149 | ||
150 | if(!extractline(argv[0], 1, 1, 0)) | |
151 | return CMD_ERROR; | |
152 | ||
153 | trusts_replication_createtables(); | |
154 | ||
155 | syncing = 1; | |
156 | ||
157 | Error("trusts_slave", ERR_INFO, "Replication in progress. . ."); | |
158 | return CMD_OK; | |
159 | } | |
160 | ||
161 | /* trdata id lines type data */ | |
162 | static int xsb_trdata(void *source, int argc, char **argv) { | |
163 | char *buf; | |
164 | ||
165 | if(!syncing) | |
166 | return CMD_OK; | |
167 | ||
168 | if(!masterserver(source)) | |
169 | return CMD_ERROR; | |
170 | ||
171 | if(argc < 1) { | |
172 | abandonreplication("bad number of args"); | |
173 | return CMD_ERROR; | |
174 | } | |
175 | ||
176 | buf = extractline(argv[0], 0, 1, 0); | |
177 | if(!buf) | |
178 | return CMD_ERROR; | |
179 | ||
180 | if(buf[0] && (buf[1] == ' ')) { | |
181 | if(buf[0] == 'G') { | |
182 | trustgroup tg; | |
183 | if(!parsetg(&buf[2], &tg, 0)) { | |
184 | abandonreplication("bad trustgroup line: %s", buf); | |
185 | return CMD_ERROR; | |
186 | } | |
187 | trustsdb_inserttg("replication_groups", &tg); | |
188 | ||
189 | freesstring(tg.name); | |
190 | freesstring(tg.createdby); | |
191 | freesstring(tg.contact); | |
192 | freesstring(tg.comment); | |
193 | ||
194 | } else if(buf[0] == 'H') { | |
195 | unsigned int tgid; | |
196 | trusthost th; | |
197 | ||
198 | if(!parseth(&buf[2], &th, &tgid, 0)) { | |
199 | abandonreplication("bad trusthost line: %s", buf); | |
200 | return CMD_ERROR; | |
201 | } | |
202 | trustsdb_insertth("replication_hosts", &th, tgid); | |
203 | } else { | |
204 | abandonreplication("bad trust type: %c", buf[0]); | |
205 | ||
206 | return CMD_ERROR; | |
207 | } | |
208 | } else { | |
209 | abandonreplication("malformed line: %s", buf); | |
210 | } | |
211 | ||
212 | return CMD_OK; | |
213 | } | |
214 | ||
215 | /* trfini id lines sha */ | |
216 | static int xsb_trfini(void *source, int argc, char **argv) { | |
217 | char *buf, digestbuf[SHA1_DIGESTSIZE * 2 + 1]; | |
218 | unsigned char digest[SHA1_DIGESTSIZE]; | |
219 | ||
220 | if(!syncing) | |
221 | return CMD_OK; | |
222 | ||
223 | if(!masterserver(source)) | |
224 | return CMD_ERROR; | |
225 | ||
226 | if(argc < 1) { | |
227 | abandonreplication("bad number of args"); | |
228 | return CMD_ERROR; | |
229 | } | |
230 | ||
231 | buf = extractline(argv[0], 0, 1, 1); | |
232 | if(!buf) | |
233 | return CMD_ERROR; | |
234 | ||
235 | if((totallines + 1) != curlineno) { | |
236 | abandonreplication("wrong number of lines received: %u vs. %u", totallines, curlineno - 1); | |
237 | return CMD_ERROR; | |
238 | } | |
239 | ||
240 | SHA1Final(digest, &s); | |
241 | if(hmac_strcmp(hmac_printhex(digest, digestbuf, SHA1_DIGESTSIZE), buf)) { | |
242 | abandonreplication("digest mismatch"); | |
243 | return CMD_ERROR; | |
244 | } | |
245 | ||
246 | Error("trusts_slave", ERR_INFO, "Data verification successful."); | |
247 | ||
248 | trusts_replication_swap(); | |
249 | ||
250 | synced = 1; | |
251 | syncing = 0; | |
252 | ||
253 | return CMD_OK; | |
254 | } | |
255 | ||
256 | static int xsb_traddgroup(void *source, int argc, char **argv) { | |
257 | trustgroup tg, *otg; | |
258 | ||
259 | if(!synced) | |
260 | return CMD_OK; | |
261 | ||
262 | if(!masterserver(source)) | |
263 | return CMD_ERROR; | |
264 | ||
265 | if(argc < 1) { | |
266 | abandonreplication("bad number of arguments"); | |
267 | return CMD_ERROR; | |
268 | } | |
269 | ||
270 | if(!parsetg(argv[0], &tg, 0)) { | |
271 | abandonreplication("bad trustgroup line: %s", argv[0]); | |
272 | return CMD_ERROR; | |
273 | } | |
274 | ||
275 | otg = tg_copy(&tg); | |
276 | ||
277 | freesstring(tg.name); | |
278 | freesstring(tg.createdby); | |
279 | freesstring(tg.contact); | |
280 | freesstring(tg.comment); | |
281 | ||
282 | if(!otg) { | |
283 | abandonreplication("unable to add trustgroup"); | |
284 | return CMD_ERROR; | |
285 | } | |
286 | ||
287 | return CMD_OK; | |
288 | } | |
289 | ||
290 | static int xsb_traddhost(void *source, int argc, char **argv) { | |
291 | unsigned int tgid; | |
292 | trusthost th; | |
293 | ||
294 | if(!synced) | |
295 | return CMD_OK; | |
296 | ||
297 | if(!masterserver(source)) | |
298 | return CMD_ERROR; | |
299 | ||
300 | if(argc < 1) { | |
301 | abandonreplication("bad number of arguments"); | |
302 | return CMD_ERROR; | |
303 | } | |
304 | ||
305 | if(!parseth(argv[0], &th, &tgid, 0)) { | |
306 | abandonreplication("bad trusthost line: %s", argv[0]); | |
307 | return CMD_ERROR; | |
308 | } | |
309 | ||
310 | th.group = tg_getbyid(tgid); | |
311 | if(!th.group) { | |
312 | abandonreplication("unable to lookup trustgroup"); | |
313 | return CMD_ERROR; | |
314 | } | |
315 | ||
316 | if(!th_copy(&th)) { | |
317 | abandonreplication("unable to add trusthost"); | |
318 | return CMD_ERROR; | |
319 | } | |
320 | ||
321 | return CMD_OK; | |
322 | } | |
323 | ||
324 | static int xsb_trdelhost(void *source, int argc, char **argv) { | |
325 | unsigned int id; | |
326 | trusthost *th; | |
327 | ||
328 | if(!synced) | |
329 | return CMD_OK; | |
330 | ||
331 | if(!masterserver(source)) | |
332 | return CMD_ERROR; | |
333 | ||
334 | if(argc < 1) { | |
335 | abandonreplication("bad number of arguments"); | |
336 | return CMD_ERROR; | |
337 | } | |
338 | ||
339 | id = strtoul(argv[0], NULL, 10); | |
340 | if(!id) { | |
341 | abandonreplication("unable to convert id to integer"); | |
342 | return CMD_ERROR; | |
343 | } | |
344 | ||
345 | th = th_getbyid(id); | |
346 | if(!th) { | |
347 | abandonreplication("unable to lookup id"); | |
348 | return CMD_ERROR; | |
349 | } | |
350 | ||
351 | th_delete(th); | |
352 | ||
353 | return CMD_OK; | |
354 | } | |
355 | ||
356 | static int xsb_trdelgroup(void *source, int argc, char **argv) { | |
357 | unsigned int id; | |
358 | trustgroup *tg; | |
359 | ||
360 | if(!synced) | |
361 | return CMD_OK; | |
362 | ||
363 | if(!masterserver(source)) | |
364 | return CMD_ERROR; | |
365 | ||
366 | if(argc < 1) { | |
367 | abandonreplication("bad number of arguments"); | |
368 | return CMD_ERROR; | |
369 | } | |
370 | ||
371 | id = strtoul(argv[0], NULL, 10); | |
372 | if(!id) { | |
373 | abandonreplication("unable to convert id to integer"); | |
374 | return CMD_ERROR; | |
375 | } | |
376 | ||
377 | tg = tg_getbyid(id); | |
378 | if(!tg) { | |
379 | abandonreplication("unable to lookup id"); | |
380 | return CMD_ERROR; | |
381 | } | |
382 | ||
383 | tg_delete(tg); | |
384 | ||
385 | return CMD_OK; | |
386 | } | |
387 | ||
388 | static int xsb_trmodifygroup(void *source, int argc, char **argv) { | |
389 | trustgroup tg, *otg; | |
390 | ||
391 | if(!synced) | |
392 | return CMD_OK; | |
393 | ||
394 | if(!masterserver(source)) | |
395 | return CMD_ERROR; | |
396 | ||
397 | if(argc < 1) { | |
398 | abandonreplication("bad number of arguments"); | |
399 | return CMD_ERROR; | |
400 | } | |
401 | ||
402 | if(!parsetg(argv[0], &tg, 0)) { | |
403 | abandonreplication("bad trustgroup line: %s", argv[0]); | |
404 | return CMD_ERROR; | |
405 | } | |
406 | ||
407 | otg = tg_getbyid(tg.id); | |
408 | ||
409 | if(otg && !tg_modify(otg, &tg)) { | |
410 | abandonreplication("unable to modify database"); | |
411 | return CMD_ERROR; | |
412 | } | |
413 | ||
414 | freesstring(tg.name); | |
415 | freesstring(tg.createdby); | |
416 | freesstring(tg.contact); | |
417 | freesstring(tg.comment); | |
418 | ||
419 | if(!otg) { | |
420 | abandonreplication("unable to lookup id"); | |
421 | return CMD_ERROR; | |
422 | } | |
423 | ||
424 | tg_update(otg); | |
425 | ||
426 | return CMD_OK; | |
427 | } | |
428 | ||
429 | static int xsb_trmodifyhost(void *source, int argc, char **argv) { | |
430 | trustgroup *tg; | |
431 | trusthost th, *oth; | |
432 | unsigned int groupid; | |
433 | ||
434 | if(!synced) | |
435 | return CMD_OK; | |
436 | ||
437 | if(!masterserver(source)) | |
438 | return CMD_ERROR; | |
439 | ||
440 | if(argc < 1) { | |
441 | abandonreplication("bad number of arguments"); | |
442 | return CMD_ERROR; | |
443 | } | |
444 | ||
445 | if(!parseth(argv[0], &th, &groupid, 0)) { | |
446 | abandonreplication("bad trusthost line: %s", argv[0]); | |
447 | return CMD_ERROR; | |
448 | } | |
449 | ||
450 | tg = tg_getbyid(groupid); | |
451 | ||
452 | for(oth=tg->hosts;oth;oth=oth->next) { | |
453 | if(ipmask_check(&oth->ip, &th.ip, th.bits) && th.bits == oth->bits) | |
454 | break; | |
455 | } | |
456 | ||
457 | if(oth && !th_modify(oth, &th)) { | |
458 | abandonreplication("unable to modify database"); | |
459 | return CMD_ERROR; | |
460 | } | |
461 | ||
462 | if(!oth) { | |
463 | abandonreplication("unable to lookup host"); | |
464 | return CMD_ERROR; | |
465 | } | |
466 | ||
467 | th_update(oth); | |
468 | ||
469 | return CMD_OK; | |
470 | } | |
471 | ||
472 | static int loaded, masternumeric = -1; | |
473 | static void *syncsched; | |
474 | ||
475 | static int masterserver(void *source) { | |
476 | nick *np = source; | |
477 | int home = homeserver(np->numeric); | |
478 | ||
479 | if(home < 0) | |
480 | return 0; | |
481 | ||
482 | if(home != masternumeric) { | |
483 | Error("trusts_slave", ERR_WARNING, "Command from server that isn't a master: %s", serverlist[home].name->content); | |
484 | return 0; | |
485 | } | |
486 | ||
487 | return 1; | |
488 | } | |
489 | ||
490 | static void checksynced(void *arg) { | |
491 | if(!synced && !syncing) | |
492 | xsb_broadcast("trrequeststart", NULL, "%s", ""); | |
493 | } | |
494 | ||
495 | static int trusts_cmdtrustresync(void *source, int argc, char **argv) { | |
496 | nick *np = source; | |
497 | ||
498 | syncing = synced = 0; | |
499 | ||
500 | checksynced(NULL); | |
501 | controlreply(np, "Synchronisation request sent."); | |
502 | ||
503 | return CMD_OK; | |
504 | } | |
505 | ||
506 | static void __serverlinked(int hooknum, void *arg) { | |
507 | int servernum = (int)(long)arg; | |
508 | ||
509 | if(!ircd_strcmp(serverlist[servernum].name->content, smasterserver->content)) { | |
510 | masternumeric = servernum; | |
511 | syncing = synced = 0; | |
512 | checksynced(NULL); | |
513 | } | |
514 | } | |
515 | ||
516 | void _init(void) { | |
517 | sstring *m; | |
518 | ||
519 | m = getconfigitem("trusts", "master"); | |
520 | if(m && (atoi(m->content) != 0)) { | |
521 | Error("trusts_slave", ERR_ERROR, "Not a slave server, not loaded."); | |
522 | return; | |
523 | } | |
524 | ||
525 | smasterserver = getcopyconfigitem("trusts", "masterserver", "", 255); | |
526 | if(!smasterserver || !smasterserver->content || !smasterserver->content[0]) { | |
527 | Error("trusts_slave", ERR_ERROR, "No master server defined."); | |
528 | freesstring(smasterserver); | |
529 | return; | |
530 | } | |
531 | ||
532 | masternumeric = findserver(smasterserver->content); | |
533 | ||
534 | loaded = 1; | |
535 | ||
536 | registercontrolhelpcmd("trustresync", NO_DEVELOPER, 0, trusts_cmdtrustresync, "Usage: trustresync"); | |
537 | ||
538 | xsb_addcommand("trinit", 1, xsb_trinit); | |
539 | xsb_addcommand("trdata", 1, xsb_trdata); | |
540 | xsb_addcommand("trfini", 1, xsb_trfini); | |
541 | xsb_addcommand("traddhost", 1, xsb_traddhost); | |
542 | xsb_addcommand("traddgroup", 1, xsb_traddgroup); | |
543 | xsb_addcommand("trdelhost", 1, xsb_trdelhost); | |
544 | xsb_addcommand("trdelgroup", 1, xsb_trdelgroup); | |
545 | xsb_addcommand("trmodifygroup", 1, xsb_trmodifygroup); | |
546 | xsb_addcommand("trmodifyhost", 1, xsb_trmodifyhost); | |
547 | ||
548 | registerhook(HOOK_SERVER_LINKED, __serverlinked); | |
549 | syncsched = schedulerecurring(time(NULL)+5, 0, 60, checksynced, NULL); | |
550 | ||
551 | if(trusts_fullyonline()) | |
552 | checksynced(NULL); | |
553 | } | |
554 | ||
555 | void _fini(void) { | |
556 | if(!loaded) | |
557 | return; | |
558 | ||
559 | freesstring(smasterserver); | |
560 | ||
561 | deregistercontrolcmd("trustresync", trusts_cmdtrustresync); | |
562 | ||
563 | xsb_delcommand("trinit", xsb_trinit); | |
564 | xsb_delcommand("trdata", xsb_trdata); | |
565 | xsb_delcommand("trfini", xsb_trfini); | |
566 | xsb_delcommand("traddhost", xsb_traddhost); | |
567 | xsb_delcommand("traddgroup", xsb_traddgroup); | |
568 | xsb_delcommand("trdelhost", xsb_trdelhost); | |
569 | xsb_delcommand("trdelgroup", xsb_trdelgroup); | |
570 | xsb_delcommand("trmodifygroup", xsb_trmodifygroup); | |
571 | xsb_delcommand("trmodifyhost", xsb_trmodifyhost); | |
572 | ||
573 | deregisterhook(HOOK_SERVER_LINKED, __serverlinked); | |
574 | ||
575 | deleteschedule(syncsched, checksynced, NULL); | |
576 | ||
577 | trusts_closedb(0); | |
578 | } |