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Commit | Line | Data |
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212380e3 | 1 | /* |
8ac75529 | 2 | * charybdis: an advanced ircd. |
212380e3 AC |
3 | * parse.c: The message parser. |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8ac75529 | 8 | * Copyright (C) 2007 William Pitcock |
212380e3 AC |
9 | * |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
23 | * USA | |
24 | * | |
f42e9ceb | 25 | * $Id: parse.c 3177 2007-02-01 00:19:14Z jilles $ |
212380e3 AC |
26 | */ |
27 | ||
28 | #include "stdinc.h" | |
29 | #include "parse.h" | |
30 | #include "client.h" | |
31 | #include "channel.h" | |
32 | #include "common.h" | |
33 | #include "hash.h" | |
4562c604 | 34 | #include "match.h" |
212380e3 AC |
35 | #include "ircd.h" |
36 | #include "numeric.h" | |
4016731b | 37 | #include "logger.h" |
212380e3 AC |
38 | #include "s_stats.h" |
39 | #include "send.h" | |
40 | #include "msg.h" | |
41 | #include "s_conf.h" | |
212380e3 AC |
42 | #include "s_serv.h" |
43 | #include "packet.h" | |
44 | ||
8ac75529 AC |
45 | static struct Dictionary *cmd_dict = NULL; |
46 | struct Dictionary *alias_dict = NULL; | |
47 | ||
161f0409 | 48 | /* parv[0] is not used, and parv[LAST] == NULL */ |
212380e3 AC |
49 | static char *para[MAXPARA + 2]; |
50 | ||
51 | static void cancel_clients(struct Client *, struct Client *, char *); | |
52 | static void remove_unknown(struct Client *, char *, char *); | |
53 | ||
54 | static void do_numeric(char[], struct Client *, struct Client *, int, char **); | |
55 | static void do_alias(struct alias_entry *, struct Client *, char *); | |
56 | ||
57 | static int handle_command(struct Message *, struct Client *, struct Client *, int, const char**); | |
58 | ||
212380e3 AC |
59 | static char buffer[1024]; |
60 | ||
212380e3 AC |
61 | /* turn a string into a parc/parv pair */ |
62 | ||
63 | ||
64 | static inline int | |
65 | string_to_array(char *string, char **parv) | |
66 | { | |
67 | char *p, *buf = string; | |
68 | int x = 1; | |
69 | ||
70 | parv[x] = NULL; | |
71 | while (*buf == ' ') /* skip leading spaces */ | |
72 | buf++; | |
73 | if(*buf == '\0') /* ignore all-space args */ | |
74 | return x; | |
75 | ||
76 | do | |
77 | { | |
78 | if(*buf == ':') /* Last parameter */ | |
79 | { | |
80 | buf++; | |
81 | parv[x++] = buf; | |
82 | parv[x] = NULL; | |
83 | return x; | |
84 | } | |
85 | else | |
86 | { | |
87 | parv[x++] = buf; | |
88 | parv[x] = NULL; | |
89 | if((p = strchr(buf, ' ')) != NULL) | |
90 | { | |
91 | *p++ = '\0'; | |
92 | buf = p; | |
93 | } | |
94 | else | |
95 | return x; | |
96 | } | |
97 | while (*buf == ' ') | |
98 | buf++; | |
99 | if(*buf == '\0') | |
100 | return x; | |
101 | } | |
161f0409 | 102 | /* we can go upto parv[MAXPARA], as parv[0] is skipped */ |
212380e3 AC |
103 | while (x < MAXPARA); |
104 | ||
105 | if(*p == ':') | |
106 | p++; | |
107 | ||
108 | parv[x++] = p; | |
109 | parv[x] = NULL; | |
110 | return x; | |
111 | } | |
112 | ||
113 | /* parse() | |
114 | * | |
819dd2d2 | 115 | * given a raw buffer, parses it and generates parv and parc |
212380e3 AC |
116 | */ |
117 | void | |
118 | parse(struct Client *client_p, char *pbuffer, char *bufend) | |
119 | { | |
120 | struct Client *from = client_p; | |
819dd2d2 | 121 | char *sender; |
212380e3 AC |
122 | char *ch; |
123 | char *s; | |
124 | char *end; | |
125 | int i = 1; | |
126 | char *numeric = 0; | |
127 | struct Message *mptr; | |
128 | ||
129 | s_assert(MyConnect(client_p)); | |
8c23bb2e | 130 | s_assert(client_p->localClient->F != NULL); |
212380e3 AC |
131 | if(IsAnyDead(client_p)) |
132 | return; | |
133 | ||
134 | for (ch = pbuffer; *ch == ' '; ch++) /* skip spaces */ | |
135 | /* null statement */ ; | |
136 | ||
137 | para[0] = from->name; | |
138 | ||
139 | if(*ch == ':') | |
140 | { | |
141 | ch++; | |
142 | ||
143 | /* point sender to the sender param */ | |
144 | sender = ch; | |
145 | ||
146 | if((s = strchr(ch, ' '))) | |
147 | { | |
148 | *s = '\0'; | |
149 | s++; | |
150 | ch = s; | |
151 | } | |
152 | ||
153 | if(*sender && IsServer(client_p)) | |
154 | { | |
f42e9ceb | 155 | from = find_client(sender); |
212380e3 AC |
156 | |
157 | /* didnt find any matching client, issue a kill */ | |
158 | if(from == NULL) | |
159 | { | |
47adde3d | 160 | ServerStats.is_unpf++; |
212380e3 AC |
161 | remove_unknown(client_p, sender, pbuffer); |
162 | return; | |
163 | } | |
164 | ||
165 | para[0] = from->name; | |
166 | ||
167 | /* fake direction, hmm. */ | |
168 | if(from->from != client_p) | |
169 | { | |
47adde3d | 170 | ServerStats.is_wrdi++; |
212380e3 AC |
171 | cancel_clients(client_p, from, pbuffer); |
172 | return; | |
173 | } | |
174 | } | |
175 | while (*ch == ' ') | |
176 | ch++; | |
177 | } | |
178 | ||
179 | if(*ch == '\0') | |
180 | { | |
47adde3d | 181 | ServerStats.is_empt++; |
212380e3 AC |
182 | return; |
183 | } | |
184 | ||
185 | /* at this point there must be some sort of command parameter */ | |
186 | ||
187 | /* | |
188 | * Extract the command code from the packet. Point s to the end | |
189 | * of the command code and calculate the length using pointer | |
190 | * arithmetic. Note: only need length for numerics and *all* | |
191 | * numerics must have parameters and thus a space after the command | |
192 | * code. -avalon | |
193 | */ | |
194 | ||
195 | /* EOB is 3 chars long but is not a numeric */ | |
196 | ||
197 | if(*(ch + 3) == ' ' && /* ok, lets see if its a possible numeric.. */ | |
198 | IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2))) | |
199 | { | |
200 | mptr = NULL; | |
201 | numeric = ch; | |
47adde3d | 202 | ServerStats.is_num++; |
212380e3 AC |
203 | s = ch + 3; /* I know this is ' ' from above if */ |
204 | *s++ = '\0'; /* blow away the ' ', and point s to next part */ | |
205 | } | |
206 | else | |
207 | { | |
208 | int ii = 0; | |
209 | ||
210 | if((s = strchr(ch, ' '))) | |
211 | *s++ = '\0'; | |
212 | ||
90187f21 | 213 | mptr = irc_dictionary_retrieve(cmd_dict, ch); |
212380e3 AC |
214 | |
215 | /* no command or its encap only, error */ | |
216 | if(!mptr || !mptr->cmd) | |
217 | { | |
218 | /* | |
219 | * Note: Give error message *only* to recognized | |
220 | * persons. It's a nightmare situation to have | |
221 | * two programs sending "Unknown command"'s or | |
222 | * equivalent to each other at full blast.... | |
223 | * If it has got to person state, it at least | |
224 | * seems to be well behaving. Perhaps this message | |
225 | * should never be generated, though... --msa | |
226 | * Hm, when is the buffer empty -- if a command | |
227 | * code has been found ?? -Armin | |
228 | */ | |
229 | if(pbuffer[0] != '\0') | |
230 | { | |
231 | if (IsPerson(client_p)) | |
232 | { | |
8ac75529 | 233 | struct alias_entry *aptr = irc_dictionary_retrieve(alias_dict, ch); |
212380e3 AC |
234 | if (aptr != NULL) |
235 | { | |
236 | do_alias(aptr, client_p, s); | |
237 | return; | |
238 | } | |
239 | } | |
240 | if(IsPerson(from)) | |
241 | { | |
242 | sendto_one(from, form_str(ERR_UNKNOWNCOMMAND), | |
243 | me.name, from->name, ch); | |
244 | } | |
245 | } | |
47adde3d | 246 | ServerStats.is_unco++; |
212380e3 AC |
247 | return; |
248 | } | |
249 | ||
250 | ii = bufend - ((s) ? s : ch); | |
251 | mptr->bytes += ii; | |
252 | } | |
253 | ||
254 | end = bufend - 1; | |
255 | ||
256 | /* XXX this should be done before parse() is called */ | |
257 | if(*end == '\n') | |
258 | *end-- = '\0'; | |
259 | if(*end == '\r') | |
260 | *end = '\0'; | |
261 | ||
262 | if(s != NULL) | |
263 | i = string_to_array(s, para); | |
264 | ||
265 | if(mptr == NULL) | |
266 | { | |
267 | do_numeric(numeric, client_p, from, i, para); | |
268 | return; | |
269 | } | |
270 | ||
271 | if(handle_command(mptr, client_p, from, i, /* XXX discards const!!! */ (const char **)para) < -1) | |
272 | { | |
273 | char *p; | |
274 | for (p = pbuffer; p <= end; p += 8) | |
275 | { | |
276 | /* HACK HACK */ | |
277 | /* Its expected this nasty code can be removed | |
278 | * or rewritten later if still needed. | |
279 | */ | |
280 | if((unsigned long) (p + 8) > (unsigned long) end) | |
281 | { | |
282 | for (; p <= end; p++) | |
283 | { | |
284 | ilog(L_MAIN, "%02x |%c", p[0], p[0]); | |
285 | } | |
286 | } | |
287 | else | |
288 | ilog(L_MAIN, | |
289 | "%02x %02x %02x %02x %02x %02x %02x %02x |%c%c%c%c%c%c%c%c", | |
290 | p[0], p[1], p[2], p[3], p[4], p[5], | |
291 | p[6], p[7], p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]); | |
292 | } | |
293 | } | |
294 | ||
295 | } | |
296 | ||
297 | /* | |
298 | * handle_command | |
299 | * | |
300 | * inputs - pointer to message block | |
301 | * - pointer to client | |
302 | * - pointer to client message is from | |
303 | * - count of number of args | |
304 | * - pointer to argv[] array | |
305 | * output - -1 if error from server | |
306 | * side effects - | |
307 | */ | |
308 | static int | |
309 | handle_command(struct Message *mptr, struct Client *client_p, | |
310 | struct Client *from, int i, const char** hpara) | |
311 | { | |
312 | struct MessageEntry ehandler; | |
313 | MessageHandler handler = 0; | |
314 | char squitreason[80]; | |
315 | ||
316 | if(IsAnyDead(client_p)) | |
317 | return -1; | |
318 | ||
319 | if(IsServer(client_p)) | |
320 | mptr->rcount++; | |
321 | ||
322 | mptr->count++; | |
323 | ||
324 | /* New patch to avoid server flooding from unregistered connects | |
325 | - Pie-Man 07/27/2000 */ | |
326 | ||
327 | if(!IsRegistered(client_p)) | |
328 | { | |
329 | /* if its from a possible server connection | |
330 | * ignore it.. more than likely its a header thats sneaked through | |
331 | */ | |
332 | ||
333 | if(IsAnyServer(client_p) && !(mptr->flags & MFLG_UNREG)) | |
334 | return (1); | |
335 | } | |
336 | ||
337 | ehandler = mptr->handlers[from->handler]; | |
338 | handler = ehandler.handler; | |
339 | ||
340 | /* check right amount of params is passed... --is */ | |
341 | if(i < ehandler.min_para || | |
342 | (ehandler.min_para && EmptyString(hpara[ehandler.min_para - 1]))) | |
343 | { | |
344 | if(!IsServer(client_p)) | |
345 | { | |
346 | sendto_one(client_p, form_str(ERR_NEEDMOREPARAMS), | |
347 | me.name, | |
348 | EmptyString(client_p->name) ? "*" : client_p->name, | |
349 | mptr->cmd); | |
350 | if(MyClient(client_p)) | |
351 | return (1); | |
352 | else | |
353 | return (-1); | |
354 | } | |
355 | ||
356 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
357 | "Dropping server %s due to (invalid) command '%s'" | |
358 | " with only %d arguments (expecting %d).", | |
359 | client_p->name, mptr->cmd, i, ehandler.min_para); | |
360 | ilog(L_SERVER, | |
361 | "Insufficient parameters (%d < %d) for command '%s' from %s.", | |
362 | i, ehandler.min_para, mptr->cmd, client_p->name); | |
c2f73e5d | 363 | rb_snprintf(squitreason, sizeof squitreason, |
212380e3 AC |
364 | "Insufficient parameters (%d < %d) for command '%s'", |
365 | i, ehandler.min_para, mptr->cmd); | |
366 | exit_client(client_p, client_p, client_p, squitreason); | |
367 | return (-1); | |
368 | } | |
369 | ||
370 | (*handler) (client_p, from, i, hpara); | |
371 | return (1); | |
372 | } | |
373 | ||
374 | void | |
375 | handle_encap(struct Client *client_p, struct Client *source_p, | |
376 | const char *command, int parc, const char *parv[]) | |
377 | { | |
378 | struct Message *mptr; | |
379 | struct MessageEntry ehandler; | |
380 | MessageHandler handler = 0; | |
381 | ||
382 | parv[0] = source_p->name; | |
383 | ||
8ac75529 | 384 | mptr = irc_dictionary_retrieve(cmd_dict, command); |
212380e3 AC |
385 | |
386 | if(mptr == NULL || mptr->cmd == NULL) | |
387 | return; | |
388 | ||
389 | ehandler = mptr->handlers[ENCAP_HANDLER]; | |
390 | handler = ehandler.handler; | |
391 | ||
392 | if(parc < ehandler.min_para || | |
393 | (ehandler.min_para && EmptyString(parv[ehandler.min_para - 1]))) | |
394 | return; | |
395 | ||
396 | (*handler) (client_p, source_p, parc, parv); | |
397 | } | |
398 | ||
399 | /* | |
400 | * clear_hash_parse() | |
401 | * | |
402 | * inputs - | |
403 | * output - NONE | |
404 | * side effects - MUST MUST be called at startup ONCE before | |
405 | * any other keyword hash routine is used. | |
406 | * | |
407 | */ | |
408 | void | |
409 | clear_hash_parse() | |
410 | { | |
8ac75529 | 411 | cmd_dict = irc_dictionary_create(strcasecmp); |
212380e3 AC |
412 | } |
413 | ||
414 | /* mod_add_cmd | |
415 | * | |
416 | * inputs - command name | |
417 | * - pointer to struct Message | |
418 | * output - none | |
419 | * side effects - load this one command name | |
420 | * msg->count msg->bytes is modified in place, in | |
421 | * modules address space. Might not want to do that... | |
422 | */ | |
423 | void | |
424 | mod_add_cmd(struct Message *msg) | |
425 | { | |
212380e3 AC |
426 | s_assert(msg != NULL); |
427 | if(msg == NULL) | |
428 | return; | |
429 | ||
8ac75529 AC |
430 | if (irc_dictionary_find(cmd_dict, msg->cmd) != NULL) |
431 | return; | |
212380e3 AC |
432 | |
433 | msg->count = 0; | |
434 | msg->rcount = 0; | |
435 | msg->bytes = 0; | |
436 | ||
8ac75529 | 437 | irc_dictionary_add(cmd_dict, msg->cmd, msg); |
212380e3 AC |
438 | } |
439 | ||
440 | /* mod_del_cmd | |
441 | * | |
442 | * inputs - command name | |
443 | * output - none | |
444 | * side effects - unload this one command name | |
445 | */ | |
446 | void | |
447 | mod_del_cmd(struct Message *msg) | |
448 | { | |
212380e3 AC |
449 | s_assert(msg != NULL); |
450 | if(msg == NULL) | |
451 | return; | |
452 | ||
8ac75529 | 453 | irc_dictionary_delete(cmd_dict, msg->cmd); |
212380e3 AC |
454 | } |
455 | ||
456 | /* | |
457 | * report_messages | |
458 | * | |
459 | * inputs - pointer to client to report to | |
460 | * output - NONE | |
461 | * side effects - NONE | |
462 | */ | |
463 | void | |
464 | report_messages(struct Client *source_p) | |
465 | { | |
8ac75529 AC |
466 | struct DictionaryIter iter; |
467 | struct Message *msg; | |
468 | struct alias_entry *amsg; | |
212380e3 | 469 | |
90187f21 | 470 | DICTIONARY_FOREACH(msg, &iter, cmd_dict) |
212380e3 | 471 | { |
8ac75529 AC |
472 | s_assert(msg->cmd != NULL); |
473 | sendto_one_numeric(source_p, RPL_STATSCOMMANDS, | |
474 | form_str(RPL_STATSCOMMANDS), | |
475 | msg->cmd, msg->count, | |
476 | msg->bytes, msg->rcount); | |
477 | } | |
212380e3 | 478 | |
90187f21 | 479 | DICTIONARY_FOREACH(amsg, &iter, alias_dict) |
8ac75529 AC |
480 | { |
481 | s_assert(amsg->name != NULL); | |
482 | sendto_one_numeric(source_p, RPL_STATSCOMMANDS, | |
483 | form_str(RPL_STATSCOMMANDS), | |
484 | amsg->name, amsg->hits, 0, 0); | |
212380e3 AC |
485 | } |
486 | } | |
487 | ||
488 | /* cancel_clients() | |
489 | * | |
490 | * inputs - client who sent us the message, client with fake | |
491 | * direction, command | |
492 | * outputs - a given warning about the fake direction | |
493 | * side effects - | |
494 | */ | |
495 | static void | |
496 | cancel_clients(struct Client *client_p, struct Client *source_p, char *cmd) | |
497 | { | |
498 | /* ok, fake prefix happens naturally during a burst on a nick | |
499 | * collision with TS5, we cant kill them because one client has to | |
500 | * survive, so we just send an error. | |
501 | */ | |
502 | if(IsServer(source_p) || IsMe(source_p)) | |
503 | { | |
504 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
505 | "Message for %s[%s] from %s", | |
506 | source_p->name, source_p->from->name, | |
b3ebc7ab | 507 | client_p->name); |
212380e3 AC |
508 | } |
509 | else | |
510 | { | |
511 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
512 | "Message for %s[%s@%s!%s] from %s (TS, ignored)", | |
513 | source_p->name, | |
514 | source_p->username, | |
515 | source_p->host, | |
516 | source_p->from->name, | |
b3ebc7ab | 517 | client_p->name); |
212380e3 AC |
518 | } |
519 | } | |
520 | ||
521 | /* remove_unknown() | |
522 | * | |
523 | * inputs - client who gave us message, supposed sender, buffer | |
524 | * output - | |
525 | * side effects - kills issued for clients, squits for servers | |
526 | */ | |
527 | static void | |
528 | remove_unknown(struct Client *client_p, char *lsender, char *lbuffer) | |
529 | { | |
530 | int slen = strlen(lsender); | |
d45f5ea2 JT |
531 | char sid[4]; |
532 | struct Client *server; | |
212380e3 | 533 | |
ba0711fd | 534 | /* meepfoo is a nickname (ignore) |
212380e3 AC |
535 | * #XXXXXXXX is a UID (KILL) |
536 | * #XX is a SID (SQUIT) | |
537 | * meep.foo is a server (SQUIT) | |
538 | */ | |
539 | if((IsDigit(lsender[0]) && slen == 3) || | |
540 | (strchr(lsender, '.') != NULL)) | |
541 | { | |
542 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
543 | "Unknown prefix (%s) from %s, Squitting %s", | |
b3ebc7ab | 544 | lbuffer, client_p->name, lsender); |
212380e3 AC |
545 | |
546 | sendto_one(client_p, | |
547 | ":%s SQUIT %s :(Unknown prefix (%s) from %s)", | |
548 | get_id(&me, client_p), lsender, | |
549 | lbuffer, client_p->name); | |
550 | } | |
d45f5ea2 JT |
551 | else if(!IsDigit(lsender[0])) |
552 | ; | |
553 | else if(slen != 9) | |
554 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
555 | "Invalid prefix (%s) from %s", | |
556 | lbuffer, client_p->name); | |
557 | else | |
558 | { | |
559 | memcpy(sid, lsender, 3); | |
560 | sid[3] = '\0'; | |
561 | server = find_server(NULL, sid); | |
562 | if (server != NULL && server->from == client_p) | |
563 | sendto_one(client_p, ":%s KILL %s :%s (Unknown Client)", | |
564 | get_id(&me, client_p), lsender, me.name); | |
565 | } | |
212380e3 AC |
566 | } |
567 | ||
568 | ||
569 | ||
570 | /* | |
571 | * | |
572 | * parc number of arguments ('sender' counted as one!) | |
212380e3 AC |
573 | * parv[1]..parv[parc-1] |
574 | * pointers to additional parameters, this is a NULL | |
575 | * terminated list (parv[parc] == NULL). | |
576 | * | |
577 | * *WARNING* | |
578 | * Numerics are mostly error reports. If there is something | |
579 | * wrong with the message, just *DROP* it! Don't even think of | |
580 | * sending back a neat error message -- big danger of creating | |
581 | * a ping pong error message... | |
582 | */ | |
583 | static void | |
584 | do_numeric(char numeric[], struct Client *client_p, struct Client *source_p, int parc, char *parv[]) | |
585 | { | |
586 | struct Client *target_p; | |
587 | struct Channel *chptr; | |
588 | ||
589 | if(parc < 2 || !IsServer(source_p)) | |
590 | return; | |
591 | ||
592 | /* Remap low number numerics. */ | |
593 | if(numeric[0] == '0') | |
594 | numeric[0] = '1'; | |
595 | ||
596 | /* | |
597 | * Prepare the parameter portion of the message into 'buffer'. | |
598 | * (Because the buffer is twice as large as the message buffer | |
599 | * for the socket, no overflow can occur here... ...on current | |
600 | * assumptions--bets are off, if these are changed --msa) | |
601 | * Note: if buffer is non-empty, it will begin with SPACE. | |
602 | */ | |
603 | if(parc > 1) | |
604 | { | |
605 | char *t = buffer; /* Current position within the buffer */ | |
606 | int i; | |
607 | int tl; /* current length of presently being built string in t */ | |
608 | for (i = 2; i < (parc - 1); i++) | |
609 | { | |
b2f0da88 | 610 | tl = rb_sprintf(t, " %s", parv[i]); |
212380e3 AC |
611 | t += tl; |
612 | } | |
b2f0da88 | 613 | rb_sprintf(t, " :%s", parv[parc - 1]); |
212380e3 AC |
614 | } |
615 | ||
616 | if((target_p = find_client(parv[1])) != NULL) | |
617 | { | |
618 | if(IsMe(target_p)) | |
619 | { | |
620 | /* | |
621 | * We shouldn't get numerics sent to us, | |
622 | * any numerics we do get indicate a bug somewhere.. | |
623 | */ | |
624 | /* ugh. this is here because of nick collisions. when two servers | |
625 | * relink, they burst each other their nicks, then perform collides. | |
626 | * if there is a nick collision, BOTH servers will kill their own | |
627 | * nicks, and BOTH will kill the other servers nick, which wont exist, | |
628 | * because it will have been already killed by the local server. | |
629 | * | |
630 | * unfortunately, as we cant guarantee other servers will do the | |
631 | * "right thing" on a nick collision, we have to keep both kills. | |
632 | * ergo we need to ignore ERR_NOSUCHNICK. --fl_ | |
633 | */ | |
634 | /* quick comment. This _was_ tried. i.e. assume the other servers | |
635 | * will do the "right thing" and kill a nick that is colliding. | |
636 | * unfortunately, it did not work. --Dianora | |
637 | */ | |
638 | /* note, now we send PING on server connect, we can | |
639 | * also get ERR_NOSUCHSERVER.. | |
640 | */ | |
641 | if(atoi(numeric) != ERR_NOSUCHNICK && | |
642 | atoi(numeric) != ERR_NOSUCHSERVER) | |
643 | sendto_realops_snomask(SNO_GENERAL, L_ADMIN, | |
644 | "*** %s(via %s) sent a %s numeric to me: %s", | |
645 | source_p->name, | |
646 | client_p->name, numeric, buffer); | |
647 | return; | |
648 | } | |
649 | else if(target_p->from == client_p) | |
650 | { | |
651 | /* This message changed direction (nick collision?) | |
652 | * ignore it. | |
653 | */ | |
654 | return; | |
655 | } | |
656 | ||
657 | /* csircd will send out unknown umode flag for +a (admin), drop it here. */ | |
658 | if((atoi(numeric) == ERR_UMODEUNKNOWNFLAG) && MyClient(target_p)) | |
659 | return; | |
660 | ||
661 | /* Fake it for server hiding, if its our client */ | |
662 | sendto_one(target_p, ":%s %s %s%s", | |
663 | get_id(source_p, target_p), numeric, | |
664 | get_id(target_p, target_p), buffer); | |
665 | return; | |
666 | } | |
667 | else if((chptr = find_channel(parv[1])) != NULL) | |
06b697a2 JT |
668 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, |
669 | "%s %s%s", | |
670 | numeric, chptr->chname, buffer); | |
212380e3 AC |
671 | } |
672 | ||
673 | static void do_alias(struct alias_entry *aptr, struct Client *source_p, char *text) | |
674 | { | |
675 | char *p; | |
676 | struct Client *target_p; | |
677 | ||
678 | if (!IsFloodDone(source_p) && source_p->localClient->receiveM > 20) | |
679 | flood_endgrace(source_p); | |
680 | ||
681 | p = strchr(aptr->target, '@'); | |
682 | if (p != NULL) | |
683 | { | |
684 | /* user@server */ | |
685 | target_p = find_server(NULL, p + 1); | |
686 | if (target_p != NULL && IsMe(target_p)) | |
687 | target_p = NULL; | |
688 | } | |
689 | else | |
690 | { | |
691 | /* nick, must be +S */ | |
692 | target_p = find_named_person(aptr->target); | |
693 | if (target_p != NULL && !IsService(target_p)) | |
694 | target_p = NULL; | |
695 | } | |
696 | ||
697 | if (target_p == NULL) | |
698 | { | |
699 | sendto_one_numeric(source_p, ERR_SERVICESDOWN, form_str(ERR_SERVICESDOWN), aptr->target); | |
700 | return; | |
701 | } | |
702 | ||
703 | if (text != NULL && *text == ':') | |
704 | text++; | |
705 | if (text == NULL || *text == '\0') | |
706 | { | |
707 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
708 | return; | |
709 | } | |
710 | ||
711 | /* increment the hitcounter on this alias */ | |
712 | aptr->hits++; | |
713 | ||
714 | sendto_one(target_p, ":%s PRIVMSG %s :%s", | |
715 | get_id(source_p, target_p), | |
716 | p != NULL ? aptr->target : get_id(target_p, target_p), | |
717 | text); | |
718 | } | |
719 | ||
720 | int | |
721 | m_not_oper(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
722 | { | |
723 | sendto_one_numeric(source_p, ERR_NOPRIVILEGES, form_str(ERR_NOPRIVILEGES)); | |
724 | return 0; | |
725 | } | |
726 | ||
727 | int | |
728 | m_unregistered(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
729 | { | |
730 | /* bit of a hack. | |
731 | * I don't =really= want to waste a bit in a flag | |
732 | * number_of_nick_changes is only really valid after the client | |
733 | * is fully registered.. | |
734 | */ | |
735 | if(client_p->localClient->number_of_nick_changes == 0) | |
736 | { | |
737 | sendto_one(client_p, form_str(ERR_NOTREGISTERED), me.name); | |
738 | client_p->localClient->number_of_nick_changes++; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | int | |
745 | m_registered(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
746 | { | |
747 | sendto_one(client_p, form_str(ERR_ALREADYREGISTRED), me.name, source_p->name); | |
748 | return 0; | |
749 | } | |
750 | ||
751 | int | |
752 | m_ignore(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
753 | { | |
754 | return 0; | |
755 | } |