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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" | |
77d3d2db | 44 | #include "s_assert.h" |
212380e3 | 45 | |
8ac75529 AC |
46 | static struct Dictionary *cmd_dict = NULL; |
47 | struct Dictionary *alias_dict = NULL; | |
48 | ||
161f0409 | 49 | /* parv[0] is not used, and parv[LAST] == NULL */ |
212380e3 AC |
50 | static char *para[MAXPARA + 2]; |
51 | ||
29c92cf9 | 52 | static void cancel_clients(struct Client *, struct Client *); |
212380e3 AC |
53 | static void remove_unknown(struct Client *, char *, char *); |
54 | ||
55 | static void do_numeric(char[], struct Client *, struct Client *, int, char **); | |
56 | static void do_alias(struct alias_entry *, struct Client *, char *); | |
57 | ||
58 | static int handle_command(struct Message *, struct Client *, struct Client *, int, const char**); | |
59 | ||
212380e3 AC |
60 | static char buffer[1024]; |
61 | ||
212380e3 AC |
62 | /* turn a string into a parc/parv pair */ |
63 | ||
e4603e3d AC |
64 | char *reconstruct_parv(int parc, const char *parv[]) |
65 | { | |
66 | static char tmpbuf[BUFSIZE]; int i; | |
67 | ||
68 | rb_strlcpy(tmpbuf, parv[0], BUFSIZE); | |
69 | for (i = 1; i < parc; i++) | |
70 | { | |
71 | rb_strlcat(tmpbuf, " ", BUFSIZE); | |
72 | rb_strlcat(tmpbuf, parv[i], BUFSIZE); | |
73 | } | |
74 | return tmpbuf; | |
75 | } | |
212380e3 AC |
76 | |
77 | static inline int | |
78 | string_to_array(char *string, char **parv) | |
79 | { | |
80 | char *p, *buf = string; | |
81 | int x = 1; | |
82 | ||
83 | parv[x] = NULL; | |
84 | while (*buf == ' ') /* skip leading spaces */ | |
85 | buf++; | |
86 | if(*buf == '\0') /* ignore all-space args */ | |
87 | return x; | |
88 | ||
89 | do | |
90 | { | |
91 | if(*buf == ':') /* Last parameter */ | |
92 | { | |
93 | buf++; | |
94 | parv[x++] = buf; | |
95 | parv[x] = NULL; | |
96 | return x; | |
97 | } | |
98 | else | |
99 | { | |
100 | parv[x++] = buf; | |
101 | parv[x] = NULL; | |
102 | if((p = strchr(buf, ' ')) != NULL) | |
103 | { | |
104 | *p++ = '\0'; | |
105 | buf = p; | |
106 | } | |
107 | else | |
108 | return x; | |
109 | } | |
110 | while (*buf == ' ') | |
111 | buf++; | |
112 | if(*buf == '\0') | |
113 | return x; | |
114 | } | |
161f0409 | 115 | /* we can go upto parv[MAXPARA], as parv[0] is skipped */ |
212380e3 AC |
116 | while (x < MAXPARA); |
117 | ||
118 | if(*p == ':') | |
119 | p++; | |
120 | ||
121 | parv[x++] = p; | |
122 | parv[x] = NULL; | |
123 | return x; | |
124 | } | |
125 | ||
126 | /* parse() | |
127 | * | |
819dd2d2 | 128 | * given a raw buffer, parses it and generates parv and parc |
212380e3 AC |
129 | */ |
130 | void | |
131 | parse(struct Client *client_p, char *pbuffer, char *bufend) | |
132 | { | |
133 | struct Client *from = client_p; | |
819dd2d2 | 134 | char *sender; |
212380e3 AC |
135 | char *ch; |
136 | char *s; | |
137 | char *end; | |
138 | int i = 1; | |
139 | char *numeric = 0; | |
140 | struct Message *mptr; | |
141 | ||
142 | s_assert(MyConnect(client_p)); | |
8c23bb2e | 143 | s_assert(client_p->localClient->F != NULL); |
212380e3 AC |
144 | if(IsAnyDead(client_p)) |
145 | return; | |
146 | ||
147 | for (ch = pbuffer; *ch == ' '; ch++) /* skip spaces */ | |
148 | /* null statement */ ; | |
149 | ||
150 | para[0] = from->name; | |
151 | ||
152 | if(*ch == ':') | |
153 | { | |
154 | ch++; | |
155 | ||
156 | /* point sender to the sender param */ | |
157 | sender = ch; | |
158 | ||
159 | if((s = strchr(ch, ' '))) | |
160 | { | |
161 | *s = '\0'; | |
162 | s++; | |
163 | ch = s; | |
164 | } | |
165 | ||
166 | if(*sender && IsServer(client_p)) | |
167 | { | |
f42e9ceb | 168 | from = find_client(sender); |
212380e3 AC |
169 | |
170 | /* didnt find any matching client, issue a kill */ | |
171 | if(from == NULL) | |
172 | { | |
47adde3d | 173 | ServerStats.is_unpf++; |
212380e3 AC |
174 | remove_unknown(client_p, sender, pbuffer); |
175 | return; | |
176 | } | |
177 | ||
178 | para[0] = from->name; | |
179 | ||
180 | /* fake direction, hmm. */ | |
181 | if(from->from != client_p) | |
182 | { | |
47adde3d | 183 | ServerStats.is_wrdi++; |
29c92cf9 | 184 | cancel_clients(client_p, from); |
212380e3 AC |
185 | return; |
186 | } | |
187 | } | |
188 | while (*ch == ' ') | |
189 | ch++; | |
190 | } | |
191 | ||
192 | if(*ch == '\0') | |
193 | { | |
47adde3d | 194 | ServerStats.is_empt++; |
212380e3 AC |
195 | return; |
196 | } | |
197 | ||
198 | /* at this point there must be some sort of command parameter */ | |
199 | ||
200 | /* | |
201 | * Extract the command code from the packet. Point s to the end | |
202 | * of the command code and calculate the length using pointer | |
203 | * arithmetic. Note: only need length for numerics and *all* | |
204 | * numerics must have parameters and thus a space after the command | |
205 | * code. -avalon | |
206 | */ | |
207 | ||
208 | /* EOB is 3 chars long but is not a numeric */ | |
209 | ||
210 | if(*(ch + 3) == ' ' && /* ok, lets see if its a possible numeric.. */ | |
211 | IsDigit(*ch) && IsDigit(*(ch + 1)) && IsDigit(*(ch + 2))) | |
212 | { | |
213 | mptr = NULL; | |
214 | numeric = ch; | |
47adde3d | 215 | ServerStats.is_num++; |
212380e3 AC |
216 | s = ch + 3; /* I know this is ' ' from above if */ |
217 | *s++ = '\0'; /* blow away the ' ', and point s to next part */ | |
218 | } | |
219 | else | |
220 | { | |
221 | int ii = 0; | |
222 | ||
223 | if((s = strchr(ch, ' '))) | |
224 | *s++ = '\0'; | |
225 | ||
90187f21 | 226 | mptr = irc_dictionary_retrieve(cmd_dict, ch); |
212380e3 AC |
227 | |
228 | /* no command or its encap only, error */ | |
229 | if(!mptr || !mptr->cmd) | |
230 | { | |
231 | /* | |
232 | * Note: Give error message *only* to recognized | |
233 | * persons. It's a nightmare situation to have | |
234 | * two programs sending "Unknown command"'s or | |
235 | * equivalent to each other at full blast.... | |
236 | * If it has got to person state, it at least | |
237 | * seems to be well behaving. Perhaps this message | |
238 | * should never be generated, though... --msa | |
239 | * Hm, when is the buffer empty -- if a command | |
240 | * code has been found ?? -Armin | |
241 | */ | |
242 | if(pbuffer[0] != '\0') | |
243 | { | |
244 | if (IsPerson(client_p)) | |
245 | { | |
8ac75529 | 246 | struct alias_entry *aptr = irc_dictionary_retrieve(alias_dict, ch); |
212380e3 AC |
247 | if (aptr != NULL) |
248 | { | |
249 | do_alias(aptr, client_p, s); | |
250 | return; | |
251 | } | |
252 | } | |
253 | if(IsPerson(from)) | |
254 | { | |
255 | sendto_one(from, form_str(ERR_UNKNOWNCOMMAND), | |
256 | me.name, from->name, ch); | |
257 | } | |
258 | } | |
47adde3d | 259 | ServerStats.is_unco++; |
212380e3 AC |
260 | return; |
261 | } | |
262 | ||
263 | ii = bufend - ((s) ? s : ch); | |
264 | mptr->bytes += ii; | |
265 | } | |
266 | ||
267 | end = bufend - 1; | |
268 | ||
269 | /* XXX this should be done before parse() is called */ | |
270 | if(*end == '\n') | |
271 | *end-- = '\0'; | |
272 | if(*end == '\r') | |
273 | *end = '\0'; | |
274 | ||
275 | if(s != NULL) | |
276 | i = string_to_array(s, para); | |
277 | ||
278 | if(mptr == NULL) | |
279 | { | |
280 | do_numeric(numeric, client_p, from, i, para); | |
281 | return; | |
282 | } | |
283 | ||
29c92cf9 | 284 | if(handle_command(mptr, client_p, from, i, /* XXX discards const!!! */ (const char **)(void *)para) < -1) |
212380e3 AC |
285 | { |
286 | char *p; | |
287 | for (p = pbuffer; p <= end; p += 8) | |
288 | { | |
289 | /* HACK HACK */ | |
290 | /* Its expected this nasty code can be removed | |
291 | * or rewritten later if still needed. | |
292 | */ | |
293 | if((unsigned long) (p + 8) > (unsigned long) end) | |
294 | { | |
295 | for (; p <= end; p++) | |
296 | { | |
297 | ilog(L_MAIN, "%02x |%c", p[0], p[0]); | |
298 | } | |
299 | } | |
300 | else | |
301 | ilog(L_MAIN, | |
302 | "%02x %02x %02x %02x %02x %02x %02x %02x |%c%c%c%c%c%c%c%c", | |
303 | p[0], p[1], p[2], p[3], p[4], p[5], | |
304 | p[6], p[7], p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]); | |
305 | } | |
306 | } | |
307 | ||
308 | } | |
309 | ||
310 | /* | |
311 | * handle_command | |
312 | * | |
313 | * inputs - pointer to message block | |
314 | * - pointer to client | |
315 | * - pointer to client message is from | |
316 | * - count of number of args | |
317 | * - pointer to argv[] array | |
318 | * output - -1 if error from server | |
319 | * side effects - | |
320 | */ | |
321 | static int | |
322 | handle_command(struct Message *mptr, struct Client *client_p, | |
323 | struct Client *from, int i, const char** hpara) | |
324 | { | |
325 | struct MessageEntry ehandler; | |
326 | MessageHandler handler = 0; | |
327 | char squitreason[80]; | |
328 | ||
329 | if(IsAnyDead(client_p)) | |
330 | return -1; | |
331 | ||
332 | if(IsServer(client_p)) | |
333 | mptr->rcount++; | |
334 | ||
335 | mptr->count++; | |
336 | ||
337 | /* New patch to avoid server flooding from unregistered connects | |
338 | - Pie-Man 07/27/2000 */ | |
339 | ||
340 | if(!IsRegistered(client_p)) | |
341 | { | |
342 | /* if its from a possible server connection | |
343 | * ignore it.. more than likely its a header thats sneaked through | |
344 | */ | |
345 | ||
346 | if(IsAnyServer(client_p) && !(mptr->flags & MFLG_UNREG)) | |
347 | return (1); | |
348 | } | |
349 | ||
350 | ehandler = mptr->handlers[from->handler]; | |
351 | handler = ehandler.handler; | |
352 | ||
353 | /* check right amount of params is passed... --is */ | |
55abcbb2 | 354 | if(i < ehandler.min_para || |
212380e3 AC |
355 | (ehandler.min_para && EmptyString(hpara[ehandler.min_para - 1]))) |
356 | { | |
357 | if(!IsServer(client_p)) | |
358 | { | |
359 | sendto_one(client_p, form_str(ERR_NEEDMOREPARAMS), | |
55abcbb2 KB |
360 | me.name, |
361 | EmptyString(client_p->name) ? "*" : client_p->name, | |
212380e3 AC |
362 | mptr->cmd); |
363 | if(MyClient(client_p)) | |
364 | return (1); | |
365 | else | |
366 | return (-1); | |
367 | } | |
368 | ||
369 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
370 | "Dropping server %s due to (invalid) command '%s'" | |
371 | " with only %d arguments (expecting %d).", | |
372 | client_p->name, mptr->cmd, i, ehandler.min_para); | |
373 | ilog(L_SERVER, | |
374 | "Insufficient parameters (%d < %d) for command '%s' from %s.", | |
375 | i, ehandler.min_para, mptr->cmd, client_p->name); | |
5203cba5 | 376 | snprintf(squitreason, sizeof squitreason, |
212380e3 AC |
377 | "Insufficient parameters (%d < %d) for command '%s'", |
378 | i, ehandler.min_para, mptr->cmd); | |
379 | exit_client(client_p, client_p, client_p, squitreason); | |
380 | return (-1); | |
381 | } | |
382 | ||
383 | (*handler) (client_p, from, i, hpara); | |
384 | return (1); | |
385 | } | |
386 | ||
387 | void | |
388 | handle_encap(struct Client *client_p, struct Client *source_p, | |
389 | const char *command, int parc, const char *parv[]) | |
390 | { | |
391 | struct Message *mptr; | |
392 | struct MessageEntry ehandler; | |
393 | MessageHandler handler = 0; | |
394 | ||
8ac75529 | 395 | mptr = irc_dictionary_retrieve(cmd_dict, command); |
212380e3 AC |
396 | |
397 | if(mptr == NULL || mptr->cmd == NULL) | |
398 | return; | |
399 | ||
400 | ehandler = mptr->handlers[ENCAP_HANDLER]; | |
401 | handler = ehandler.handler; | |
402 | ||
55abcbb2 | 403 | if(parc < ehandler.min_para || |
212380e3 AC |
404 | (ehandler.min_para && EmptyString(parv[ehandler.min_para - 1]))) |
405 | return; | |
406 | ||
407 | (*handler) (client_p, source_p, parc, parv); | |
408 | } | |
409 | ||
410 | /* | |
411 | * clear_hash_parse() | |
412 | * | |
413 | * inputs - | |
414 | * output - NONE | |
415 | * side effects - MUST MUST be called at startup ONCE before | |
416 | * any other keyword hash routine is used. | |
417 | * | |
418 | */ | |
419 | void | |
420 | clear_hash_parse() | |
421 | { | |
99b461bb | 422 | cmd_dict = irc_dictionary_create("command", strcasecmp); |
212380e3 AC |
423 | } |
424 | ||
425 | /* mod_add_cmd | |
426 | * | |
427 | * inputs - command name | |
428 | * - pointer to struct Message | |
429 | * output - none | |
430 | * side effects - load this one command name | |
431 | * msg->count msg->bytes is modified in place, in | |
432 | * modules address space. Might not want to do that... | |
433 | */ | |
434 | void | |
435 | mod_add_cmd(struct Message *msg) | |
436 | { | |
212380e3 AC |
437 | s_assert(msg != NULL); |
438 | if(msg == NULL) | |
439 | return; | |
440 | ||
8ac75529 AC |
441 | if (irc_dictionary_find(cmd_dict, msg->cmd) != NULL) |
442 | return; | |
212380e3 AC |
443 | |
444 | msg->count = 0; | |
445 | msg->rcount = 0; | |
446 | msg->bytes = 0; | |
447 | ||
8ac75529 | 448 | irc_dictionary_add(cmd_dict, msg->cmd, msg); |
212380e3 AC |
449 | } |
450 | ||
451 | /* mod_del_cmd | |
452 | * | |
453 | * inputs - command name | |
454 | * output - none | |
455 | * side effects - unload this one command name | |
456 | */ | |
457 | void | |
458 | mod_del_cmd(struct Message *msg) | |
459 | { | |
212380e3 AC |
460 | s_assert(msg != NULL); |
461 | if(msg == NULL) | |
462 | return; | |
463 | ||
8ac75529 | 464 | irc_dictionary_delete(cmd_dict, msg->cmd); |
212380e3 AC |
465 | } |
466 | ||
467 | /* | |
468 | * report_messages | |
469 | * | |
470 | * inputs - pointer to client to report to | |
471 | * output - NONE | |
472 | * side effects - NONE | |
473 | */ | |
474 | void | |
475 | report_messages(struct Client *source_p) | |
476 | { | |
8ac75529 AC |
477 | struct DictionaryIter iter; |
478 | struct Message *msg; | |
479 | struct alias_entry *amsg; | |
212380e3 | 480 | |
90187f21 | 481 | DICTIONARY_FOREACH(msg, &iter, cmd_dict) |
212380e3 | 482 | { |
8ac75529 | 483 | s_assert(msg->cmd != NULL); |
55abcbb2 | 484 | sendto_one_numeric(source_p, RPL_STATSCOMMANDS, |
8ac75529 | 485 | form_str(RPL_STATSCOMMANDS), |
55abcbb2 | 486 | msg->cmd, msg->count, |
8ac75529 AC |
487 | msg->bytes, msg->rcount); |
488 | } | |
212380e3 | 489 | |
90187f21 | 490 | DICTIONARY_FOREACH(amsg, &iter, alias_dict) |
8ac75529 AC |
491 | { |
492 | s_assert(amsg->name != NULL); | |
493 | sendto_one_numeric(source_p, RPL_STATSCOMMANDS, | |
494 | form_str(RPL_STATSCOMMANDS), | |
77910830 | 495 | amsg->name, amsg->hits, 0L, 0); |
212380e3 AC |
496 | } |
497 | } | |
498 | ||
499 | /* cancel_clients() | |
500 | * | |
501 | * inputs - client who sent us the message, client with fake | |
29c92cf9 | 502 | * direction |
212380e3 AC |
503 | * outputs - a given warning about the fake direction |
504 | * side effects - | |
505 | */ | |
506 | static void | |
29c92cf9 | 507 | cancel_clients(struct Client *client_p, struct Client *source_p) |
212380e3 AC |
508 | { |
509 | /* ok, fake prefix happens naturally during a burst on a nick | |
510 | * collision with TS5, we cant kill them because one client has to | |
511 | * survive, so we just send an error. | |
512 | */ | |
513 | if(IsServer(source_p) || IsMe(source_p)) | |
514 | { | |
515 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
516 | "Message for %s[%s] from %s", | |
517 | source_p->name, source_p->from->name, | |
b3ebc7ab | 518 | client_p->name); |
212380e3 AC |
519 | } |
520 | else | |
521 | { | |
522 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
523 | "Message for %s[%s@%s!%s] from %s (TS, ignored)", | |
524 | source_p->name, | |
525 | source_p->username, | |
526 | source_p->host, | |
527 | source_p->from->name, | |
b3ebc7ab | 528 | client_p->name); |
212380e3 AC |
529 | } |
530 | } | |
531 | ||
532 | /* remove_unknown() | |
533 | * | |
534 | * inputs - client who gave us message, supposed sender, buffer | |
55abcbb2 | 535 | * output - |
212380e3 AC |
536 | * side effects - kills issued for clients, squits for servers |
537 | */ | |
538 | static void | |
539 | remove_unknown(struct Client *client_p, char *lsender, char *lbuffer) | |
540 | { | |
541 | int slen = strlen(lsender); | |
d45f5ea2 JT |
542 | char sid[4]; |
543 | struct Client *server; | |
212380e3 | 544 | |
ba0711fd | 545 | /* meepfoo is a nickname (ignore) |
212380e3 AC |
546 | * #XXXXXXXX is a UID (KILL) |
547 | * #XX is a SID (SQUIT) | |
548 | * meep.foo is a server (SQUIT) | |
549 | */ | |
55abcbb2 | 550 | if((IsDigit(lsender[0]) && slen == 3) || |
212380e3 AC |
551 | (strchr(lsender, '.') != NULL)) |
552 | { | |
553 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
554 | "Unknown prefix (%s) from %s, Squitting %s", | |
b3ebc7ab | 555 | lbuffer, client_p->name, lsender); |
212380e3 AC |
556 | |
557 | sendto_one(client_p, | |
558 | ":%s SQUIT %s :(Unknown prefix (%s) from %s)", | |
55abcbb2 | 559 | get_id(&me, client_p), lsender, |
212380e3 AC |
560 | lbuffer, client_p->name); |
561 | } | |
d45f5ea2 JT |
562 | else if(!IsDigit(lsender[0])) |
563 | ; | |
564 | else if(slen != 9) | |
565 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
566 | "Invalid prefix (%s) from %s", | |
567 | lbuffer, client_p->name); | |
568 | else | |
569 | { | |
570 | memcpy(sid, lsender, 3); | |
571 | sid[3] = '\0'; | |
572 | server = find_server(NULL, sid); | |
573 | if (server != NULL && server->from == client_p) | |
55abcbb2 | 574 | sendto_one(client_p, ":%s KILL %s :%s (Unknown Client)", |
d45f5ea2 JT |
575 | get_id(&me, client_p), lsender, me.name); |
576 | } | |
212380e3 AC |
577 | } |
578 | ||
579 | ||
580 | ||
581 | /* | |
582 | * | |
583 | * parc number of arguments ('sender' counted as one!) | |
212380e3 AC |
584 | * parv[1]..parv[parc-1] |
585 | * pointers to additional parameters, this is a NULL | |
586 | * terminated list (parv[parc] == NULL). | |
587 | * | |
588 | * *WARNING* | |
589 | * Numerics are mostly error reports. If there is something | |
590 | * wrong with the message, just *DROP* it! Don't even think of | |
591 | * sending back a neat error message -- big danger of creating | |
592 | * a ping pong error message... | |
593 | */ | |
594 | static void | |
595 | do_numeric(char numeric[], struct Client *client_p, struct Client *source_p, int parc, char *parv[]) | |
596 | { | |
597 | struct Client *target_p; | |
598 | struct Channel *chptr; | |
599 | ||
600 | if(parc < 2 || !IsServer(source_p)) | |
601 | return; | |
602 | ||
603 | /* Remap low number numerics. */ | |
604 | if(numeric[0] == '0') | |
605 | numeric[0] = '1'; | |
606 | ||
607 | /* | |
608 | * Prepare the parameter portion of the message into 'buffer'. | |
609 | * (Because the buffer is twice as large as the message buffer | |
610 | * for the socket, no overflow can occur here... ...on current | |
611 | * assumptions--bets are off, if these are changed --msa) | |
612 | * Note: if buffer is non-empty, it will begin with SPACE. | |
613 | */ | |
614 | if(parc > 1) | |
615 | { | |
616 | char *t = buffer; /* Current position within the buffer */ | |
617 | int i; | |
618 | int tl; /* current length of presently being built string in t */ | |
619 | for (i = 2; i < (parc - 1); i++) | |
620 | { | |
5203cba5 | 621 | tl = sprintf(t, " %s", parv[i]); |
212380e3 AC |
622 | t += tl; |
623 | } | |
5203cba5 | 624 | sprintf(t, " :%s", parv[parc - 1]); |
212380e3 AC |
625 | } |
626 | ||
627 | if((target_p = find_client(parv[1])) != NULL) | |
628 | { | |
629 | if(IsMe(target_p)) | |
630 | { | |
631 | /* | |
632 | * We shouldn't get numerics sent to us, | |
633 | * any numerics we do get indicate a bug somewhere.. | |
634 | */ | |
635 | /* ugh. this is here because of nick collisions. when two servers | |
636 | * relink, they burst each other their nicks, then perform collides. | |
637 | * if there is a nick collision, BOTH servers will kill their own | |
638 | * nicks, and BOTH will kill the other servers nick, which wont exist, | |
639 | * because it will have been already killed by the local server. | |
640 | * | |
641 | * unfortunately, as we cant guarantee other servers will do the | |
55abcbb2 | 642 | * "right thing" on a nick collision, we have to keep both kills. |
212380e3 AC |
643 | * ergo we need to ignore ERR_NOSUCHNICK. --fl_ |
644 | */ | |
645 | /* quick comment. This _was_ tried. i.e. assume the other servers | |
646 | * will do the "right thing" and kill a nick that is colliding. | |
647 | * unfortunately, it did not work. --Dianora | |
648 | */ | |
649 | /* note, now we send PING on server connect, we can | |
650 | * also get ERR_NOSUCHSERVER.. | |
651 | */ | |
652 | if(atoi(numeric) != ERR_NOSUCHNICK && | |
653 | atoi(numeric) != ERR_NOSUCHSERVER) | |
654 | sendto_realops_snomask(SNO_GENERAL, L_ADMIN, | |
655 | "*** %s(via %s) sent a %s numeric to me: %s", | |
656 | source_p->name, | |
657 | client_p->name, numeric, buffer); | |
658 | return; | |
659 | } | |
660 | else if(target_p->from == client_p) | |
661 | { | |
662 | /* This message changed direction (nick collision?) | |
663 | * ignore it. | |
664 | */ | |
665 | return; | |
666 | } | |
667 | ||
668 | /* csircd will send out unknown umode flag for +a (admin), drop it here. */ | |
669 | if((atoi(numeric) == ERR_UMODEUNKNOWNFLAG) && MyClient(target_p)) | |
670 | return; | |
671 | ||
672 | /* Fake it for server hiding, if its our client */ | |
55abcbb2 KB |
673 | sendto_one(target_p, ":%s %s %s%s", |
674 | get_id(source_p, target_p), numeric, | |
212380e3 AC |
675 | get_id(target_p, target_p), buffer); |
676 | return; | |
677 | } | |
678 | else if((chptr = find_channel(parv[1])) != NULL) | |
06b697a2 JT |
679 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, |
680 | "%s %s%s", | |
681 | numeric, chptr->chname, buffer); | |
212380e3 AC |
682 | } |
683 | ||
684 | static void do_alias(struct alias_entry *aptr, struct Client *source_p, char *text) | |
685 | { | |
686 | char *p; | |
687 | struct Client *target_p; | |
688 | ||
689 | if (!IsFloodDone(source_p) && source_p->localClient->receiveM > 20) | |
690 | flood_endgrace(source_p); | |
691 | ||
692 | p = strchr(aptr->target, '@'); | |
693 | if (p != NULL) | |
694 | { | |
695 | /* user@server */ | |
696 | target_p = find_server(NULL, p + 1); | |
697 | if (target_p != NULL && IsMe(target_p)) | |
698 | target_p = NULL; | |
699 | } | |
700 | else | |
701 | { | |
702 | /* nick, must be +S */ | |
703 | target_p = find_named_person(aptr->target); | |
704 | if (target_p != NULL && !IsService(target_p)) | |
705 | target_p = NULL; | |
706 | } | |
707 | ||
708 | if (target_p == NULL) | |
709 | { | |
710 | sendto_one_numeric(source_p, ERR_SERVICESDOWN, form_str(ERR_SERVICESDOWN), aptr->target); | |
711 | return; | |
712 | } | |
713 | ||
714 | if (text != NULL && *text == ':') | |
715 | text++; | |
716 | if (text == NULL || *text == '\0') | |
717 | { | |
718 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
719 | return; | |
720 | } | |
721 | ||
722 | /* increment the hitcounter on this alias */ | |
723 | aptr->hits++; | |
724 | ||
725 | sendto_one(target_p, ":%s PRIVMSG %s :%s", | |
726 | get_id(source_p, target_p), | |
727 | p != NULL ? aptr->target : get_id(target_p, target_p), | |
728 | text); | |
729 | } | |
730 | ||
731 | int | |
732 | m_not_oper(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
733 | { | |
734 | sendto_one_numeric(source_p, ERR_NOPRIVILEGES, form_str(ERR_NOPRIVILEGES)); | |
735 | return 0; | |
736 | } | |
737 | ||
738 | int | |
739 | m_unregistered(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
740 | { | |
741 | /* bit of a hack. | |
742 | * I don't =really= want to waste a bit in a flag | |
743 | * number_of_nick_changes is only really valid after the client | |
744 | * is fully registered.. | |
745 | */ | |
746 | if(client_p->localClient->number_of_nick_changes == 0) | |
747 | { | |
748 | sendto_one(client_p, form_str(ERR_NOTREGISTERED), me.name); | |
749 | client_p->localClient->number_of_nick_changes++; | |
750 | } | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | int | |
756 | m_registered(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
757 | { | |
758 | sendto_one(client_p, form_str(ERR_ALREADYREGISTRED), me.name, source_p->name); | |
759 | return 0; | |
760 | } | |
761 | ||
762 | int | |
763 | m_ignore(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
764 | { | |
765 | return 0; | |
766 | } |