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1 | /* proto-common.c - common IRC protocol parsing/sending support | |
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 "conf.h" | |
22 | #include "gline.h" | |
23 | #include "ioset.h" | |
24 | #include "log.h" | |
25 | #include "nickserv.h" | |
26 | #include "spamserv.h" | |
27 | #include "shun.h" | |
28 | #include "timeq.h" | |
29 | #ifdef HAVE_SYS_SOCKET_H | |
30 | #include <sys/socket.h> | |
31 | #endif | |
32 | #ifdef HAVE_NETINET_IN_H | |
33 | #include <netinet/in.h> | |
34 | #endif | |
35 | #ifdef HAVE_ARPA_INET_H | |
36 | #include <arpa/inet.h> | |
37 | #endif | |
38 | ||
39 | unsigned int lines_processed; | |
40 | FILE *replay_file; | |
41 | struct io_fd *socket_io_fd; | |
42 | int force_n2k; | |
43 | const char *hidden_host_suffix; | |
44 | ||
45 | static char replay_line[MAXLEN+80]; | |
46 | static int ping_freq; | |
47 | static int ping_timeout; | |
48 | static int replay_connected; | |
49 | static unsigned int nicklen = NICKLEN; /* how long do we think servers allow nicks to be? */ | |
50 | static struct userList dead_users; | |
51 | ||
52 | extern struct cManagerNode cManager; | |
53 | extern unsigned long burst_length; | |
54 | extern struct cManagerNode cManager; | |
55 | extern struct policer_params *oper_policer_params, *luser_policer_params; | |
56 | extern time_t boot_time; | |
57 | ||
58 | void received_ping(void); | |
59 | ||
60 | static int replay_read(void); | |
61 | static dict_t irc_func_dict; | |
62 | ||
63 | typedef void (*foreach_chanfunc) (struct chanNode *chan, void *data); | |
64 | typedef void (*foreach_nonchan) (char *name, void *data); | |
65 | typedef void (*foreach_userfunc) (struct userNode *user, void *data); | |
66 | typedef void (*foreach_nonuser) (char *name, void *data); | |
67 | static void parse_foreach(char *target_list, foreach_chanfunc cf, foreach_nonchan nc, foreach_userfunc uf, foreach_nonuser nu, void *data); | |
68 | static void call_channel_mode_funcs(struct userNode *who, struct chanNode *channel, char **modes, unsigned int argc); | |
69 | ||
70 | static void | |
71 | uplink_readable(struct io_fd *fd) { | |
72 | static char buffer[MAXLEN]; | |
73 | char *eol; | |
74 | int pos; | |
75 | ||
76 | pos = ioset_line_read(fd, buffer, sizeof(buffer)); | |
77 | if (pos <= 0) { | |
78 | close_socket(); | |
79 | return; | |
80 | } | |
81 | if ((eol = strpbrk(buffer, "\r\n"))) | |
82 | *eol = 0; | |
83 | log_replay(MAIN_LOG, false, buffer); | |
84 | if (cManager.uplink->state != DISCONNECTED) | |
85 | parse_line(buffer, 0); | |
86 | lines_processed++; | |
87 | } | |
88 | ||
89 | void | |
90 | socket_destroyed(struct io_fd *fd) | |
91 | { | |
92 | if (fd && fd->state != IO_CONNECTED) | |
93 | log_module(MAIN_LOG, LOG_ERROR, "Connection to server lost."); | |
94 | socket_io_fd = NULL; | |
95 | cManager.uplink->state = DISCONNECTED; | |
96 | if (self->uplink) | |
97 | DelServer(self->uplink, 0, NULL); | |
98 | } | |
99 | ||
100 | void replay_event_loop(void) | |
101 | { | |
102 | while (!quit_services) { | |
103 | if (!replay_connected) { | |
104 | /* this time fudging is to get some of the logging right */ | |
105 | self->link_time = self->boot = now; | |
106 | cManager.uplink->state = AUTHENTICATING; | |
107 | irc_introduce(cManager.uplink->password); | |
108 | replay_connected = 1; | |
109 | } else if (!replay_read()) { | |
110 | log_module(MAIN_LOG, LOG_ERROR, "Connection to server lost."); | |
111 | close_socket(); | |
112 | } | |
113 | timeq_run(); | |
114 | } | |
115 | } | |
116 | ||
117 | int | |
118 | create_socket_client(struct uplinkNode *target) | |
119 | { | |
120 | int port = target->port; | |
121 | const char *addr = target->host; | |
122 | ||
123 | if (replay_file) | |
124 | return feof(replay_file) ? 0 : 1; | |
125 | ||
126 | if (socket_io_fd) { | |
127 | /* Leave the existing socket open, say we failed. */ | |
128 | log_module(MAIN_LOG, LOG_ERROR, "Refusing to create second connection to %s:%d.", addr, port); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | log_module(MAIN_LOG, LOG_INFO, "Connecting to %s:%i...", addr, port); | |
133 | ||
134 | socket_io_fd = ioset_connect(cManager.uplink->bind_addr, cManager.uplink->bind_addr_len, addr, port, 1, 0, NULL); | |
135 | if (!socket_io_fd) { | |
136 | log_module(MAIN_LOG, LOG_ERROR, "Connection to uplink failed: %s (%d)", strerror(errno), errno); | |
137 | target->state = DISCONNECTED; | |
138 | target->tries++; | |
139 | return 0; | |
140 | } | |
141 | socket_io_fd->readable_cb = uplink_readable; | |
142 | socket_io_fd->destroy_cb = socket_destroyed; | |
143 | socket_io_fd->line_reads = 1; | |
144 | log_module(MAIN_LOG, LOG_INFO, "Connection to server established."); | |
145 | cManager.uplink = target; | |
146 | target->state = AUTHENTICATING; | |
147 | target->tries = 0; | |
148 | return 1; | |
149 | } | |
150 | ||
151 | void | |
152 | replay_read_line(void) | |
153 | { | |
154 | struct tm timestamp; | |
155 | time_t new_time; | |
156 | ||
157 | if (replay_line[0]) return; | |
158 | read_line: | |
159 | if (!fgets(replay_line, sizeof(replay_line), replay_file)) { | |
160 | if (feof(replay_file)) { | |
161 | quit_services = 1; | |
162 | memset(replay_line, 0, sizeof(replay_line)); | |
163 | return; | |
164 | } | |
165 | } | |
166 | if ((replay_line[0] != '[') | |
167 | || (replay_line[3] != ':') | |
168 | || (replay_line[6] != ':') | |
169 | || (replay_line[9] != ' ') | |
170 | || (replay_line[12] != '/') | |
171 | || (replay_line[15] != '/') | |
172 | || (replay_line[20] != ']') | |
173 | || (replay_line[21] != ' ')) { | |
174 | log_module(MAIN_LOG, LOG_ERROR, "Unrecognized timestamp in replay file: %s", replay_line); | |
175 | goto read_line; | |
176 | } | |
177 | timestamp.tm_hour = strtoul(replay_line+1, NULL, 10); | |
178 | timestamp.tm_min = strtoul(replay_line+4, NULL, 10); | |
179 | timestamp.tm_sec = strtoul(replay_line+7, NULL, 10); | |
180 | timestamp.tm_mon = strtoul(replay_line+10, NULL, 10) - 1; | |
181 | timestamp.tm_mday = strtoul(replay_line+13, NULL, 10); | |
182 | timestamp.tm_year = strtoul(replay_line+16, NULL, 10) - 1900; | |
183 | timestamp.tm_isdst = 0; | |
184 | new_time = mktime(×tamp); | |
185 | if (new_time == -1) { | |
186 | log_module(MAIN_LOG, LOG_ERROR, "Unable to parse time struct tm_sec=%d tm_min=%d tm_hour=%d tm_mday=%d tm_mon=%d tm_year=%d", timestamp.tm_sec, timestamp.tm_min, timestamp.tm_hour, timestamp.tm_mday, timestamp.tm_mon, timestamp.tm_year); | |
187 | } else { | |
188 | now = new_time; | |
189 | } | |
190 | ||
191 | if (strncmp(replay_line+22, "(info) ", 7)) | |
192 | goto read_line; | |
193 | return; | |
194 | } | |
195 | ||
196 | static int | |
197 | replay_read(void) | |
198 | { | |
199 | size_t len; | |
200 | char read_line[MAXLEN]; | |
201 | while (1) { | |
202 | replay_read_line(); | |
203 | /* if it's a sent line, break out to handle it */ | |
204 | if (!strncmp(replay_line+29, " ", 3)) | |
205 | break; | |
206 | if (!strncmp(replay_line+29, "W: ", 3)) { | |
207 | log_module(MAIN_LOG, LOG_ERROR, "Expected response from services: %s", replay_line+32); | |
208 | replay_line[0] = 0; | |
209 | } else { | |
210 | return 0; | |
211 | } | |
212 | } | |
213 | log_replay(MAIN_LOG, false, replay_line+32); | |
214 | safestrncpy(read_line, replay_line+32, sizeof(read_line)); | |
215 | len = strlen(read_line); | |
216 | if (read_line[len-1] == '\n') | |
217 | read_line[--len] = 0; | |
218 | replay_line[0] = 0; | |
219 | parse_line(read_line, 0); | |
220 | lines_processed++; | |
221 | return 1; | |
222 | } | |
223 | ||
224 | static void | |
225 | replay_write(char *text) | |
226 | { | |
227 | replay_read_line(); | |
228 | if (strncmp(replay_line+29, "W: ", 3)) { | |
229 | log_module(MAIN_LOG, LOG_ERROR, "Unexpected output during replay: %s", text); | |
230 | return; | |
231 | } else { | |
232 | if (strcmp(replay_line+32, text)) { | |
233 | log_module(MAIN_LOG, LOG_ERROR, "Incorrect output during replay:\nReceived: %sExpected: %s", text, replay_line+32); | |
234 | } else { | |
235 | log_replay(MAIN_LOG, true, text); | |
236 | } | |
237 | replay_line[0] = 0; | |
238 | } | |
239 | } | |
240 | ||
241 | void putsock(const char *text, ...) PRINTF_LIKE(1, 2); | |
242 | ||
243 | void | |
244 | putsock(const char *text, ...) | |
245 | { | |
246 | va_list arg_list; | |
247 | char buffer[MAXLEN]; | |
248 | int pos; | |
249 | ||
250 | if (!cManager.uplink || cManager.uplink->state == DISCONNECTED) return; | |
251 | buffer[0] = '\0'; | |
252 | va_start(arg_list, text); | |
253 | pos = vsnprintf(buffer, MAXLEN - 2, text, arg_list); | |
254 | va_end(arg_list); | |
255 | if (pos < 0 || pos > (MAXLEN - 2)) pos = MAXLEN - 2; | |
256 | buffer[pos] = 0; | |
257 | if (!replay_file) { | |
258 | log_replay(MAIN_LOG, true, buffer); | |
259 | buffer[pos++] = '\n'; | |
260 | buffer[pos] = 0; | |
261 | ioset_write(socket_io_fd, buffer, pos); | |
262 | } else { | |
263 | replay_write(buffer); | |
264 | } | |
265 | } | |
266 | ||
267 | void | |
268 | close_socket(void) | |
269 | { | |
270 | if (replay_file) { | |
271 | replay_connected = 0; | |
272 | socket_destroyed(socket_io_fd); | |
273 | } else { | |
274 | ioset_close(socket_io_fd, 3); | |
275 | socket_io_fd = NULL; | |
276 | } | |
277 | } | |
278 | ||
279 | #define CMD_FUNC(NAME) int NAME(UNUSED_ARG(const char *origin), UNUSED_ARG(unsigned int argc), UNUSED_ARG(char **argv)) | |
280 | typedef CMD_FUNC(cmd_func_t); | |
281 | ||
282 | static void timed_ping_timeout(void *data); | |
283 | ||
284 | /* Ping state is kept in the timeq (only one of these two can be in | |
285 | * the queue at any given time). */ | |
286 | void | |
287 | timed_send_ping(UNUSED_ARG(void *data)) | |
288 | { | |
289 | irc_ping(self->name); | |
290 | timeq_add(now + ping_timeout, timed_ping_timeout, 0); | |
291 | } | |
292 | ||
293 | static void | |
294 | timed_ping_timeout(UNUSED_ARG(void *data)) | |
295 | { | |
296 | /* Uplink "health" tracking could be accomplished by counting the | |
297 | number of ping timeouts that happen for each uplink. After the | |
298 | timeouts per time period exceeds some amount, the uplink could | |
299 | be marked as unavalable.*/ | |
300 | irc_squit(self, "Ping timeout.", NULL); | |
301 | } | |
302 | ||
303 | static CMD_FUNC(cmd_pass) | |
304 | { | |
305 | const char *true_pass; | |
306 | ||
307 | if (argc < 2) | |
308 | return 0; | |
309 | true_pass = cManager.uplink->their_password; | |
310 | if (true_pass && strcmp(true_pass, argv[1])) { | |
311 | /* It might be good to mark the uplink as unavailable when | |
312 | this happens, though there should be a way of resetting | |
313 | the flag. */ | |
314 | irc_squit(self, "Incorrect password received.", NULL); | |
315 | return 1; | |
316 | } | |
317 | ||
318 | cManager.uplink->state = BURSTING; | |
319 | return 1; | |
320 | } | |
321 | ||
322 | static CMD_FUNC(cmd_dummy) | |
323 | { | |
324 | /* we don't care about these messages */ | |
325 | return 1; | |
326 | } | |
327 | ||
328 | static CMD_FUNC(cmd_error) | |
329 | { | |
330 | if (argv[1]) log_module(MAIN_LOG, LOG_ERROR, "Error: %s", argv[1]); | |
331 | log_module(MAIN_LOG, LOG_ERROR, "Error received from uplink, squitting."); | |
332 | ||
333 | if (cManager.uplink->state != CONNECTED) { | |
334 | /* Error messages while connected should be fine. */ | |
335 | cManager.uplink->flags |= UPLINK_UNAVAILABLE; | |
336 | log_module(MAIN_LOG, LOG_ERROR, "Disabling uplink."); | |
337 | } | |
338 | ||
339 | close_socket(); | |
340 | return 1; | |
341 | } | |
342 | ||
343 | static CMD_FUNC(cmd_stats) | |
344 | { | |
345 | struct userNode *un; | |
346 | ||
347 | if (argc < 2) | |
348 | return 0; | |
349 | if (!(un = GetUserH(origin))) | |
350 | return 0; | |
351 | switch (argv[1][0]) { | |
352 | case 'u': { | |
353 | unsigned int uptime = now - boot_time; | |
354 | irc_numeric(un, RPL_STATSUPTIME, ":Server Up %d days %d:%02d:%02d", | |
355 | uptime/(24*60*60), (uptime/(60*60))%24, (uptime/60)%60, uptime%60); | |
356 | irc_numeric(un, RPL_MAXCONNECTIONS, ":Highest connection count: %d (%d clients)", | |
357 | self->max_clients+1, self->max_clients); | |
358 | break; | |
359 | } | |
360 | default: /* unrecognized/unhandled stats output */ break; | |
361 | } | |
362 | irc_numeric(un, 219, "%s :End of /STATS report", argv[1]); | |
363 | return 1; | |
364 | } | |
365 | ||
366 | static CMD_FUNC(cmd_version) | |
367 | { | |
368 | struct userNode *user; | |
369 | if (!(user = GetUserH(origin))) { | |
370 | log_module(MAIN_LOG, LOG_ERROR, "Could not find VERSION origin user %s", origin); | |
371 | return 0; | |
372 | } | |
373 | irc_numeric(user, 351, "%s %s %s", PACKAGE_TARNAME, PACKAGE_VERSION, self->name); | |
374 | return 1; | |
375 | } | |
376 | ||
377 | static CMD_FUNC(cmd_admin) | |
378 | { | |
379 | struct userNode *user; | |
380 | struct string_list *slist; | |
381 | ||
382 | if (!(user = GetUserH(origin))) { | |
383 | log_module(MAIN_LOG, LOG_ERROR, "Could not find ADMIN origin user %s", origin); | |
384 | return 0; | |
385 | } | |
386 | if ((slist = conf_get_data("server/admin", RECDB_STRING_LIST)) && slist->used) { | |
387 | unsigned int i; | |
388 | ||
389 | irc_numeric(user, 256, ":Administrative info about %s", self->name); | |
390 | for (i = 0; i < slist->used && i < 3; i++) | |
391 | irc_numeric(user, 257 + i, ":%s", slist->list[i]); | |
392 | } else { | |
393 | irc_numeric(user, 423, ":No administrative info available"); | |
394 | } | |
395 | return 1; | |
396 | } | |
397 | ||
398 | static void | |
399 | recalc_bursts(struct server *eob_server) | |
400 | { | |
401 | unsigned int nn; | |
402 | eob_server->burst = eob_server->self_burst; | |
403 | if (eob_server->uplink != self) | |
404 | eob_server->burst = eob_server->burst || eob_server->uplink->burst; | |
405 | for (nn=0; nn < eob_server->children.used; nn++) | |
406 | recalc_bursts(eob_server->children.list[nn]); | |
407 | } | |
408 | ||
409 | static struct chanmsg_func { | |
410 | chanmsg_func_t func; | |
411 | struct userNode *service; | |
412 | void *extra; | |
413 | } chanmsg_funcs[256]; /* indexed by trigger character */ | |
414 | ||
415 | static struct allchanmsg_func { | |
416 | chanmsg_func_t func; | |
417 | struct userNode *service; | |
418 | } allchanmsg_funcs[ALLCHANMSG_FUNCS_MAX]; | |
419 | ||
420 | struct privmsg_desc { | |
421 | struct userNode *user; | |
422 | char *text; | |
423 | unsigned int is_notice : 1; | |
424 | unsigned int is_qualified : 1; | |
425 | }; | |
426 | ||
427 | static void | |
428 | privmsg_chan_helper(struct chanNode *cn, void *data) | |
429 | { | |
430 | struct privmsg_desc *pd = data; | |
431 | struct modeNode *mn; | |
432 | struct chanmsg_func *cf; | |
433 | int x; | |
434 | ||
435 | /* Don't complain if it can't find the modeNode because the channel might | |
436 | * be -n */ | |
437 | if ((mn = GetUserMode(cn, pd->user))) | |
438 | mn->idle_since = now; | |
439 | ||
440 | /* Never send a NOTICE to a channel to one of the services */ | |
441 | cf = &chanmsg_funcs[(unsigned char)pd->text[0]]; | |
442 | if (!pd->is_notice && cf->func) | |
443 | cf->func(pd->user, cn, pd->text+1, cf->service, pd->is_notice, cf->extra); | |
444 | else | |
445 | spamserv_channel_message(cn, pd->user, pd->text); | |
446 | ||
447 | /* This catches *all* text sent to the channel that the services server sees */ | |
448 | for (x = 0; x < ALLCHANMSG_FUNCS_MAX; x++) { | |
449 | cf = (struct chanmsg_func *)&allchanmsg_funcs[x]; | |
450 | if (!cf->func) | |
451 | break; /* end of list */ | |
452 | else | |
453 | cf->func(pd->user, cn, pd->text, cf->service, pd->is_notice, cf->extra); | |
454 | } | |
455 | } | |
456 | ||
457 | static void | |
458 | privmsg_invalid(char *name, void *data) | |
459 | { | |
460 | struct privmsg_desc *pd = data; | |
461 | ||
462 | if (*name == '$') | |
463 | return; | |
464 | irc_numeric(pd->user, ERR_NOSUCHNICK, "%s@%s :No such nick", name, self->name); | |
465 | } | |
466 | ||
467 | struct part_desc { | |
468 | struct userNode *user; | |
469 | const char *text; | |
470 | }; | |
471 | ||
472 | static void | |
473 | part_helper(struct chanNode *cn, void *data) | |
474 | { | |
475 | struct part_desc *desc = data; | |
476 | DelChannelUser(desc->user, cn, desc->text, false); | |
477 | } | |
478 | ||
479 | static CMD_FUNC(cmd_part) | |
480 | { | |
481 | struct part_desc desc; | |
482 | ||
483 | if (argc < 2) | |
484 | return 0; | |
485 | desc.user = GetUserH(origin); | |
486 | if (!desc.user) | |
487 | return 0; | |
488 | desc.text = (argc > 2) ? argv[argc - 1] : NULL; | |
489 | parse_foreach(argv[1], part_helper, NULL, NULL, NULL, &desc); | |
490 | return 1; | |
491 | } | |
492 | ||
493 | void | |
494 | reg_chanmsg_func(unsigned char prefix, struct userNode *service, chanmsg_func_t handler, void *extra) | |
495 | { | |
496 | if (chanmsg_funcs[prefix].func) | |
497 | log_module(MAIN_LOG, LOG_WARNING, "Re-registering new chanmsg handler for character `%c'.", prefix); | |
498 | chanmsg_funcs[prefix].func = handler; | |
499 | chanmsg_funcs[prefix].service = service; | |
500 | chanmsg_funcs[prefix].extra = extra; | |
501 | } | |
502 | ||
503 | void | |
504 | reg_allchanmsg_func(struct userNode *service, chanmsg_func_t handler) | |
505 | { | |
506 | int x; | |
507 | for (x = 0; x < ALLCHANMSG_FUNCS_MAX; x++) { | |
508 | if (allchanmsg_funcs[x].func) | |
509 | continue; | |
510 | allchanmsg_funcs[x].func = handler; | |
511 | allchanmsg_funcs[x].service = service; | |
512 | break; | |
513 | } | |
514 | } | |
515 | ||
516 | struct userNode * | |
517 | get_chanmsg_bot(unsigned char prefix) | |
518 | { | |
519 | return chanmsg_funcs[prefix].service; | |
520 | } | |
521 | ||
522 | static mode_change_func_t *mcf_list; | |
523 | static void **mcf_list_extra; | |
524 | static unsigned int mcf_size = 0, mcf_used = 0; | |
525 | ||
526 | void | |
527 | reg_mode_change_func(mode_change_func_t handler, void *extra) | |
528 | { | |
529 | if (mcf_used == mcf_size) { | |
530 | if (mcf_size) { | |
531 | mcf_size <<= 1; | |
532 | mcf_list = realloc(mcf_list, mcf_size*sizeof(mode_change_func_t)); | |
533 | mcf_list_extra = realloc(mcf_list_extra, mcf_size*sizeof(void*)); | |
534 | } else { | |
535 | mcf_size = 8; | |
536 | mcf_list = malloc(mcf_size*sizeof(mode_change_func_t)); | |
537 | mcf_list_extra = malloc(mcf_size*sizeof(void*)); | |
538 | } | |
539 | } | |
540 | mcf_list[mcf_used] = handler; | |
541 | mcf_list_extra[mcf_used++] = extra; | |
542 | } | |
543 | ||
544 | static oper_func_t *of_list; | |
545 | static void **of_list_extra; | |
546 | static unsigned int of_size = 0, of_used = 0; | |
547 | ||
548 | void | |
549 | reg_oper_func(oper_func_t handler, void *extra) | |
550 | { | |
551 | if (of_used == of_size) { | |
552 | if (of_size) { | |
553 | of_size <<= 1; | |
554 | of_list = realloc(of_list, of_size*sizeof(oper_func_t)); | |
555 | of_list_extra = realloc(of_list_extra, of_size*sizeof(void*)); | |
556 | } else { | |
557 | of_size = 8; | |
558 | of_list = malloc(of_size*sizeof(oper_func_t)); | |
559 | of_list_extra = malloc(of_size*sizeof(void*)); | |
560 | } | |
561 | } | |
562 | of_list[of_used] = handler; | |
563 | of_list_extra[of_used++] = extra; | |
564 | } | |
565 | ||
566 | static void | |
567 | call_oper_funcs(struct userNode *user) | |
568 | { | |
569 | unsigned int n; | |
570 | if (IsLocal(user)) | |
571 | return; | |
572 | for (n=0; (n<of_used) && !user->dead; n++) | |
573 | { | |
574 | of_list[n](user, of_list_extra[n]); | |
575 | } | |
576 | } | |
577 | ||
578 | struct mod_chanmode * | |
579 | mod_chanmode_alloc(unsigned int argc) | |
580 | { | |
581 | struct mod_chanmode *res; | |
582 | if (argc > 1) | |
583 | res = calloc(1, sizeof(*res) + (argc-1)*sizeof(res->args[0])); | |
584 | else | |
585 | res = calloc(1, sizeof(*res)); | |
586 | if (res) { | |
587 | #if !defined(NDEBUG) | |
588 | res->alloc_argc = argc; | |
589 | #endif | |
590 | res->argc = argc; | |
591 | } | |
592 | return res; | |
593 | } | |
594 | ||
595 | struct mod_chanmode * | |
596 | mod_chanmode_dup(struct mod_chanmode *orig, unsigned int extra) | |
597 | { | |
598 | struct mod_chanmode *res; | |
599 | res = mod_chanmode_alloc(orig->argc + extra); | |
600 | if (res) { | |
601 | res->modes_set = orig->modes_set; | |
602 | res->modes_clear = orig->modes_clear; | |
603 | res->new_limit = orig->new_limit; | |
604 | memcpy(res->new_key, orig->new_key, sizeof(res->new_key)); | |
605 | memcpy(res->new_upass, orig->new_upass, sizeof(res->new_upass)); | |
606 | memcpy(res->new_apass, orig->new_apass, sizeof(res->new_apass)); | |
607 | res->argc = orig->argc; | |
608 | memcpy(res->args, orig->args, orig->argc*sizeof(orig->args[0])); | |
609 | } | |
610 | return res; | |
611 | } | |
612 | ||
613 | void | |
614 | mod_chanmode_apply(struct userNode *who, struct chanNode *channel, struct mod_chanmode *change) | |
615 | { | |
616 | struct banNode *bn; | |
617 | struct exemptNode *en; | |
618 | unsigned int ii, jj; | |
619 | ||
620 | assert(change->argc <= change->alloc_argc); | |
621 | channel->modes = (channel->modes & ~change->modes_clear) | change->modes_set; | |
622 | if (change->modes_set & MODE_LIMIT) | |
623 | channel->limit = change->new_limit; | |
624 | if (change->modes_set & MODE_KEY) | |
625 | strcpy(channel->key, change->new_key); | |
626 | if (change->modes_set & MODE_UPASS) | |
627 | strcpy(channel->upass, change->new_upass); | |
628 | if (change->modes_set & MODE_APASS) | |
629 | strcpy(channel->apass, change->new_apass); | |
630 | for (ii = 0; ii < change->argc; ++ii) { | |
631 | switch (change->args[ii].mode) { | |
632 | case MODE_BAN: | |
633 | /* If any existing ban is a subset of the new ban, | |
634 | * silently remove it. The new ban is not allowed | |
635 | * to be more specific than an existing ban. | |
636 | */ | |
637 | for (jj=0; jj<channel->banlist.used; ++jj) { | |
638 | bn = channel->banlist.list[jj]; | |
639 | if (match_ircglobs(change->args[ii].u.hostmask, bn->ban)) { | |
640 | banList_remove(&channel->banlist, bn); | |
641 | free(bn); | |
642 | jj--; | |
643 | } | |
644 | } | |
645 | bn = calloc(1, sizeof(*bn)); | |
646 | safestrncpy(bn->ban, change->args[ii].u.hostmask, sizeof(bn->ban)); | |
647 | if (who) | |
648 | safestrncpy(bn->who, who->nick, sizeof(bn->who)); | |
649 | else | |
650 | safestrncpy(bn->who, "<unknown>", sizeof(bn->who)); | |
651 | bn->set = now; | |
652 | banList_append(&channel->banlist, bn); | |
653 | break; | |
654 | case MODE_REMOVE|MODE_BAN: | |
655 | for (jj=0; jj<channel->banlist.used; ++jj) { | |
656 | bn = channel->banlist.list[jj]; | |
657 | if (strcmp(bn->ban, change->args[ii].u.hostmask)) | |
658 | continue; | |
659 | free(bn); | |
660 | banList_remove(&channel->banlist, bn); | |
661 | break; | |
662 | } | |
663 | break; | |
664 | case MODE_EXEMPT: | |
665 | /* If any existing exempt is a subset of the new exempt, | |
666 | * silently remove it. The new exempt is not allowed | |
667 | * to be more specific than an existing exempt. | |
668 | */ | |
669 | for (jj=0; jj<channel->exemptlist.used; ++jj) { | |
670 | if (match_ircglobs(change->args[ii].u.hostmask, channel->exemptlist.list[jj]->exempt)) { | |
671 | exemptList_remove(&channel->exemptlist, channel->exemptlist.list[jj]); | |
672 | free(channel->exemptlist.list[jj]); | |
673 | jj--; | |
674 | } | |
675 | } | |
676 | en = calloc(1, sizeof(*en)); | |
677 | safestrncpy(en->exempt, change->args[ii].u.hostmask, sizeof(en->exempt)); | |
678 | if (who) | |
679 | safestrncpy(en->who, who->nick, sizeof(en->who)); | |
680 | else | |
681 | safestrncpy(en->who, "<unknown>", sizeof(en->who)); | |
682 | en->set = now; | |
683 | exemptList_append(&channel->exemptlist, en); | |
684 | break; | |
685 | case MODE_REMOVE|MODE_EXEMPT: | |
686 | for (jj=0; jj<channel->exemptlist.used; ++jj) { | |
687 | if (strcmp(channel->exemptlist.list[jj]->exempt, change->args[ii].u.hostmask)) | |
688 | continue; | |
689 | free(channel->exemptlist.list[jj]); | |
690 | exemptList_remove(&channel->exemptlist, channel->exemptlist.list[jj]); | |
691 | break; | |
692 | } | |
693 | break; | |
694 | /* XXX Hack: this is the stupedest use of switch iv ever seen. | |
695 | * you have to compare for EVERY POSSIBLE COMBINATION of bitmask | |
696 | * because switch does only full comparison. This needs redone as if/else. | |
697 | **/ | |
698 | case MODE_CHANOP: | |
699 | case MODE_HALFOP: | |
700 | case MODE_VOICE: | |
701 | case MODE_VOICE|MODE_CHANOP: | |
702 | case MODE_VOICE|MODE_HALFOP: | |
703 | case MODE_CHANOP|MODE_HALFOP: | |
704 | case MODE_VOICE|MODE_CHANOP|MODE_HALFOP: | |
705 | case MODE_REMOVE|MODE_CHANOP: | |
706 | case MODE_REMOVE|MODE_HALFOP: | |
707 | case MODE_REMOVE|MODE_VOICE: | |
708 | case MODE_REMOVE|MODE_VOICE|MODE_CHANOP: | |
709 | case MODE_REMOVE|MODE_VOICE|MODE_HALFOP: | |
710 | case MODE_REMOVE|MODE_CHANOP|MODE_HALFOP: | |
711 | case MODE_REMOVE|MODE_VOICE|MODE_CHANOP|MODE_HALFOP: | |
712 | if (change->args[ii].mode & MODE_REMOVE) | |
713 | change->args[ii].u.member->modes &= ~change->args[ii].mode; | |
714 | else | |
715 | change->args[ii].u.member->modes |= change->args[ii].mode; | |
716 | break; | |
717 | default: | |
718 | assert(0 && "Invalid mode argument"); | |
719 | continue; | |
720 | } | |
721 | } | |
722 | } | |
723 | ||
724 | void | |
725 | mod_chanmode_free(struct mod_chanmode *change) | |
726 | { | |
727 | free(change); | |
728 | } | |
729 | ||
730 | int | |
731 | mod_chanmode(struct userNode *who, struct chanNode *channel, char **modes, unsigned int argc, unsigned int flags) | |
732 | { | |
733 | struct modeNode *member; | |
734 | struct mod_chanmode *change; | |
735 | unsigned int ii; | |
736 | short base_oplevel; | |
737 | ||
738 | ||
739 | if (!modes || !modes[0]) | |
740 | return 0; | |
741 | if (who && (member = GetUserMode(channel, who))) | |
742 | base_oplevel = member->oplevel; | |
743 | else | |
744 | base_oplevel = MAXOPLEVEL; | |
745 | if (!(change = mod_chanmode_parse(channel, modes, argc, flags, base_oplevel))) | |
746 | return 0; | |
747 | ||
748 | call_channel_mode_funcs(who, channel, modes, argc); | |
749 | ||
750 | if (flags & MC_ANNOUNCE) | |
751 | mod_chanmode_announce(who, channel, change); | |
752 | else | |
753 | mod_chanmode_apply(who, channel, change); | |
754 | if (flags & MC_NOTIFY) | |
755 | for (ii = 0; ii < mcf_used; ++ii) | |
756 | mcf_list[ii](channel, who, change, mcf_list_extra[ii]); | |
757 | mod_chanmode_free(change); | |
758 | return 1; | |
759 | } | |
760 | ||
761 | int | |
762 | irc_make_chanmode(struct chanNode *chan, char *out) | |
763 | { | |
764 | struct mod_chanmode change; | |
765 | mod_chanmode_init(&change); | |
766 | change.modes_set = chan->modes; | |
767 | change.new_limit = chan->limit; | |
768 | safestrncpy(change.new_key, chan->key, sizeof(change.new_key)); | |
769 | safestrncpy(change.new_upass, chan->upass, sizeof(change.new_upass)); | |
770 | safestrncpy(change.new_apass, chan->apass, sizeof(change.new_apass)); | |
771 | return strlen(mod_chanmode_format(&change, out)); | |
772 | } | |
773 | ||
774 | static user_mode_func_t *um_list; | |
775 | static void **um_list_extra; | |
776 | static unsigned int um_size = 0, um_used = 0; | |
777 | ||
778 | void | |
779 | reg_user_mode_func(user_mode_func_t handler, void *extra) | |
780 | { | |
781 | if (um_used == um_size) { | |
782 | if (um_size) { | |
783 | um_size <<= 1; | |
784 | um_list = realloc(um_list, um_size*sizeof(user_mode_func_t)); | |
785 | um_list_extra = realloc(um_list_extra, um_size*sizeof(void*)); | |
786 | } else { | |
787 | um_size = 8; | |
788 | um_list = malloc(um_size*sizeof(user_mode_func_t)); | |
789 | um_list_extra = malloc(um_size*sizeof(void*)); | |
790 | } | |
791 | } | |
792 | um_list[um_used] = handler; | |
793 | um_list_extra[um_used++] = extra; | |
794 | } | |
795 | ||
796 | void | |
797 | unreg_user_mode_func(user_mode_func_t handler) | |
798 | { | |
799 | unsigned int i; | |
800 | for (i=0; i<um_used; i++) { | |
801 | if (um_list[i] == handler) break; | |
802 | } | |
803 | if (i == um_used) return; | |
804 | memmove(um_list+i, um_list+i+1, (um_used-i-1)*sizeof(um_list[0])); | |
805 | um_used--; | |
806 | } | |
807 | ||
808 | static void | |
809 | call_user_mode_funcs(struct userNode *user, const char *mode_change) | |
810 | { | |
811 | unsigned int n; | |
812 | for (n=0; n<um_used; n++) { | |
813 | um_list[n](user, mode_change, um_list_extra[n]); | |
814 | } | |
815 | } | |
816 | ||
817 | static channel_mode_func_t *cm_list; | |
818 | static void **cm_list_extra; | |
819 | static unsigned int cm_size = 0, cm_used = 0; | |
820 | ||
821 | void | |
822 | reg_channel_mode_func(channel_mode_func_t handler, void *extra) | |
823 | { | |
824 | if (cm_used == cm_size) { | |
825 | if (cm_size) { | |
826 | cm_size <<= 1; | |
827 | cm_list = realloc(cm_list, cm_size*sizeof(channel_mode_func_t)); | |
828 | cm_list_extra = realloc(cm_list_extra, cm_size*sizeof(void*)); | |
829 | } else { | |
830 | cm_size = 8; | |
831 | cm_list = malloc(cm_size*sizeof(channel_mode_func_t)); | |
832 | cm_list_extra = malloc(cm_size*sizeof(void*)); | |
833 | } | |
834 | } | |
835 | cm_list[cm_used] = handler; | |
836 | cm_list_extra[cm_used++] = extra; | |
837 | } | |
838 | ||
839 | void | |
840 | unreg_channel_mode_func(channel_mode_func_t handler) | |
841 | { | |
842 | unsigned int i; | |
843 | for (i=0; i<cm_used; i++) { | |
844 | if(cm_list[i] == handler) break; | |
845 | } | |
846 | if (i == cm_used) return; | |
847 | memmove(cm_list+i, cm_list+i+1, (cm_used-i-1)*sizeof(cm_list[0])); | |
848 | cm_used--; | |
849 | } | |
850 | ||
851 | static void | |
852 | call_channel_mode_funcs(struct userNode *who, struct chanNode *channel, char **modes, unsigned int argc) | |
853 | { | |
854 | unsigned int n; | |
855 | for (n=0; n<cm_used; n++) { | |
856 | cm_list[n](who, channel, modes, argc, cm_list_extra[n]); | |
857 | } | |
858 | } | |
859 | ||
860 | char * | |
861 | generate_hostmask(struct userNode *user, int options) | |
862 | { | |
863 | irc_in_addr_t ip; | |
864 | char *nickname, *ident, *hostname, *mask; | |
865 | int len, ii; | |
866 | ||
867 | /* figure out string parts */ | |
868 | if (options & GENMASK_OMITNICK) | |
869 | nickname = NULL; | |
870 | else if (options & GENMASK_USENICK) | |
871 | nickname = user->nick; | |
872 | else | |
873 | nickname = "*"; | |
874 | if (options & GENMASK_STRICT_IDENT) | |
875 | // sethost - reed/apples | |
876 | if (IsSetHost(user)) { | |
877 | ident = alloca(strcspn(user->sethost, "@")+2); | |
878 | safestrncpy(ident, user->sethost, strcspn(user->sethost, "@")+1); | |
879 | } | |
880 | else | |
881 | ident = user->ident; | |
882 | else if (options & GENMASK_ANY_IDENT) | |
883 | ident = "*"; | |
884 | else { | |
885 | // sethost - reed/apples | |
886 | if (IsSetHost(user)) { | |
887 | ident = alloca(strcspn(user->sethost, "@")+3); | |
888 | ident[0] = '*'; | |
889 | safestrncpy(ident+1, user->sethost, strcspn(user->sethost, "@")+1); | |
890 | } else { | |
891 | ident = alloca(strlen(user->ident)+2); | |
892 | ident[0] = '*'; | |
893 | strcpy(ident+1, user->ident + ((*user->ident == '~')?1:0)); | |
894 | } | |
895 | } | |
896 | hostname = user->hostname; | |
897 | if (IsFakeHost(user) && IsHiddenHost(user) && !(options & GENMASK_NO_HIDING)) { | |
898 | hostname = user->fakehost; | |
899 | } else if (IsHiddenHost(user)) { | |
900 | int style = 1; | |
901 | char *data; | |
902 | data = conf_get_data("server/hidden_host_type", RECDB_QSTRING); | |
903 | if (data) | |
904 | style = atoi(data); | |
905 | ||
906 | if ((style == 1) && user->handle_info && hidden_host_suffix && !(options & GENMASK_NO_HIDING)) { | |
907 | hostname = alloca(strlen(user->handle_info->handle) + strlen(hidden_host_suffix) + 2); | |
908 | sprintf(hostname, "%s.%s", user->handle_info->handle, hidden_host_suffix); | |
909 | } else if ((style == 2) && !(options & GENMASK_NO_HIDING)) { | |
910 | hostname = alloca(strlen(user->crypthost)); | |
911 | sprintf(hostname, "%s", user->crypthost); | |
912 | } | |
913 | } else if (options & GENMASK_STRICT_HOST) { | |
914 | if (options & GENMASK_BYIP) | |
915 | hostname = (char*)irc_ntoa(&user->ip); | |
916 | } else if ((options & GENMASK_BYIP) || irc_pton(&ip, NULL, hostname)) { | |
917 | /* Should generate an IP-based hostmask. */ | |
918 | hostname = alloca(IRC_NTOP_MAX_SIZE); | |
919 | hostname[IRC_NTOP_MAX_SIZE-1] = '\0'; | |
920 | if (irc_in_addr_is_ipv4(user->ip)) { | |
921 | /* By popular acclaim, a /16 hostmask is used. */ | |
922 | sprintf(hostname, "%d.%d.*", user->ip.in6_8[12], user->ip.in6_8[13]); | |
923 | } else if (irc_in_addr_is_ipv6(user->ip)) { | |
924 | /* Who knows what the default mask should be? Use a /48 to start with. */ | |
925 | sprintf(hostname, "%x:%x:%x:*", user->ip.in6[0], user->ip.in6[1], user->ip.in6[2]); | |
926 | } else { | |
927 | /* Unknown type; just copy IP directly. */ | |
928 | irc_ntop(hostname, IRC_NTOP_MAX_SIZE, &user->ip); | |
929 | } | |
930 | } else { | |
931 | int cnt; | |
932 | /* This heuristic could be made smarter. Is it worth the effort? */ | |
933 | for (ii=cnt=0; hostname[ii]; ii++) | |
934 | if (hostname[ii] == '.') | |
935 | cnt++; | |
936 | if (cnt == 0 || cnt == 1) { | |
937 | /* only a one- or two-level domain name; leave hostname */ | |
938 | } else if (cnt == 2) { | |
939 | for (ii=0; user->hostname[ii] != '.'; ii++) ; | |
940 | /* Add 3 to account for the *. and \0. */ | |
941 | hostname = alloca(strlen(user->hostname+ii)+3); | |
942 | sprintf(hostname, "*.%s", user->hostname+ii+1); | |
943 | } else { | |
944 | for (cnt=3, ii--; cnt; ii--) | |
945 | if (user->hostname[ii] == '.') | |
946 | cnt--; | |
947 | /* The loop above will overshoot the dot one character; | |
948 | we skip forward two (the one character and the dot) | |
949 | when printing, so we only add one for the \0. */ | |
950 | hostname = alloca(strlen(user->hostname+ii)+1); | |
951 | sprintf(hostname, "*.%s", user->hostname+ii+2); | |
952 | } | |
953 | } | |
954 | // sethost - reed/apples | |
955 | if (IsSetHost(user)) | |
956 | hostname = strchr(user->sethost, '@') + 1; | |
957 | ||
958 | /* Emit hostmask */ | |
959 | len = strlen(ident) + strlen(hostname) + 2; | |
960 | if (nickname) { | |
961 | len += strlen(nickname) + 1; | |
962 | mask = malloc(len); | |
963 | sprintf(mask, "%s!%s@%s", nickname, ident, hostname); | |
964 | } else { | |
965 | mask = malloc(len); | |
966 | sprintf(mask, "%s@%s", ident, hostname); | |
967 | } | |
968 | return mask; | |
969 | } | |
970 | ||
971 | int | |
972 | IsChannelName(const char *name) { | |
973 | unsigned int ii; | |
974 | ||
975 | if (*name !='#') | |
976 | return 0; | |
977 | for (ii=1; name[ii]; ++ii) { | |
978 | if ((name[ii] > 0) && (name[ii] <= 32)) | |
979 | return 0; | |
980 | if (name[ii] == ',') | |
981 | return 0; | |
982 | if (name[ii] == '\xa0') | |
983 | return 0; | |
984 | } | |
985 | return 1; | |
986 | } | |
987 | ||
988 | ||
989 | unsigned int | |
990 | irc_user_modes(const struct userNode *user, char modes[], size_t length) | |
991 | { | |
992 | unsigned int ii, jj; | |
993 | ||
994 | for (ii = jj = 0; (jj < length) && (irc_user_mode_chars[ii] != '\0'); ++ii) { | |
995 | if ((user->modes & (1 << ii)) && (irc_user_mode_chars[ii] != ' ')) | |
996 | modes[jj++] = irc_user_mode_chars[ii]; | |
997 | } | |
998 | ||
999 | ii = jj; | |
1000 | while (jj < length) | |
1001 | modes[jj++] = '\0'; | |
1002 | ||
1003 | return ii; | |
1004 | } | |
1005 |