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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_message.c: Sends a (PRIVMSG|NOTICE) message to a user or channel. | |
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 | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | * | |
24 | * $Id: m_message.c 3173 2007-01-31 23:57:18Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | #include "client.h" | |
29 | #include "ircd.h" | |
30 | #include "numeric.h" | |
31 | #include "common.h" | |
32 | #include "s_conf.h" | |
33 | #include "s_serv.h" | |
34 | #include "msg.h" | |
35 | #include "parse.h" | |
36 | #include "modules.h" | |
37 | #include "channel.h" | |
38 | #include "match.h" | |
39 | #include "hash.h" | |
40 | #include "class.h" | |
41 | #include "msg.h" | |
42 | #include "packet.h" | |
43 | #include "send.h" | |
44 | #include "s_newconf.h" | |
45 | #include "s_stats.h" | |
46 | #include "inline/stringops.h" | |
47 | ||
48 | static int m_message(int, const char *, struct Client *, struct Client *, int, const char **); | |
49 | static int m_privmsg(struct Client *, struct Client *, int, const char **); | |
50 | static int m_notice(struct Client *, struct Client *, int, const char **); | |
51 | ||
52 | static void expire_tgchange(void *unused); | |
53 | static struct ev_entry *expire_tgchange_event; | |
54 | ||
55 | static int | |
56 | modinit(void) | |
57 | { | |
58 | expire_tgchange_event = rb_event_addish("expire_tgchange", expire_tgchange, NULL, 300); | |
59 | expire_tgchange(NULL); | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static void | |
64 | moddeinit(void) | |
65 | { | |
66 | rb_event_delete(expire_tgchange_event); | |
67 | } | |
68 | ||
69 | struct Message privmsg_msgtab = { | |
70 | "PRIVMSG", 0, 0, 0, MFLG_SLOW | MFLG_UNREG, | |
71 | {mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}} | |
72 | }; | |
73 | struct Message notice_msgtab = { | |
74 | "NOTICE", 0, 0, 0, MFLG_SLOW, | |
75 | {mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}} | |
76 | }; | |
77 | ||
78 | mapi_clist_av1 message_clist[] = { &privmsg_msgtab, ¬ice_msgtab, NULL }; | |
79 | ||
80 | DECLARE_MODULE_AV1(message, modinit, moddeinit, message_clist, NULL, NULL, "$Revision: 3173 $"); | |
81 | ||
82 | struct entity | |
83 | { | |
84 | void *ptr; | |
85 | int type; | |
86 | int flags; | |
87 | }; | |
88 | ||
89 | static int build_target_list(int p_or_n, const char *command, | |
90 | struct Client *client_p, | |
91 | struct Client *source_p, const char *nicks_channels, const char *text); | |
92 | ||
93 | static struct Channel *find_allowing_channel(struct Client *source_p, struct Client *target_p); | |
94 | static int flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p); | |
95 | static int flood_attack_channel(int p_or_n, struct Client *source_p, | |
96 | struct Channel *chptr, char *chname); | |
97 | ||
98 | #define ENTITY_NONE 0 | |
99 | #define ENTITY_CHANNEL 1 | |
100 | #define ENTITY_CHANNEL_OPMOD 2 | |
101 | #define ENTITY_CHANOPS_ON_CHANNEL 3 | |
102 | #define ENTITY_CLIENT 4 | |
103 | ||
104 | static struct entity targets[512]; | |
105 | static int ntargets = 0; | |
106 | ||
107 | static int duplicate_ptr(void *); | |
108 | ||
109 | static void msg_channel(int p_or_n, const char *command, | |
110 | struct Client *client_p, | |
111 | struct Client *source_p, struct Channel *chptr, const char *text); | |
112 | ||
113 | static void msg_channel_opmod(int p_or_n, const char *command, | |
114 | struct Client *client_p, | |
115 | struct Client *source_p, struct Channel *chptr, | |
116 | const char *text); | |
117 | ||
118 | static void msg_channel_flags(int p_or_n, const char *command, | |
119 | struct Client *client_p, | |
120 | struct Client *source_p, | |
121 | struct Channel *chptr, int flags, const char *text); | |
122 | ||
123 | static void msg_client(int p_or_n, const char *command, | |
124 | struct Client *source_p, struct Client *target_p, const char *text); | |
125 | ||
126 | static void handle_special(int p_or_n, const char *command, | |
127 | struct Client *client_p, struct Client *source_p, const char *nick, | |
128 | const char *text); | |
129 | ||
130 | /* | |
131 | ** m_privmsg | |
132 | ** | |
133 | ** massive cleanup | |
134 | ** rev argv 6/91 | |
135 | ** | |
136 | ** Another massive cleanup Nov, 2000 | |
137 | ** (I don't think there is a single line left from 6/91. Maybe.) | |
138 | ** m_privmsg and m_notice do basically the same thing. | |
139 | ** in the original 2.8.2 code base, they were the same function | |
140 | ** "m_message.c." When we did the great cleanup in conjuncton with bleep | |
141 | ** of ircu fame, we split m_privmsg.c and m_notice.c. | |
142 | ** I don't see the point of that now. Its harder to maintain, its | |
143 | ** easier to introduce bugs into one version and not the other etc. | |
144 | ** Really, the penalty of an extra function call isn't that big a deal folks. | |
145 | ** -db Nov 13, 2000 | |
146 | ** | |
147 | */ | |
148 | ||
149 | #define PRIVMSG 0 | |
150 | #define NOTICE 1 | |
151 | ||
152 | static int | |
153 | m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
154 | { | |
155 | return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv); | |
156 | } | |
157 | ||
158 | static int | |
159 | m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
160 | { | |
161 | return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv); | |
162 | } | |
163 | ||
164 | /* | |
165 | * inputs - flag privmsg or notice | |
166 | * - pointer to command "PRIVMSG" or "NOTICE" | |
167 | * - pointer to client_p | |
168 | * - pointer to source_p | |
169 | * - pointer to channel | |
170 | */ | |
171 | static int | |
172 | m_message(int p_or_n, | |
173 | const char *command, | |
174 | struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
175 | { | |
176 | int i; | |
177 | ||
178 | if(parc < 2 || EmptyString(parv[1])) | |
179 | { | |
180 | if(p_or_n != NOTICE) | |
181 | sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name, | |
182 | source_p->name, command); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | if(parc < 3 || EmptyString(parv[2])) | |
187 | { | |
188 | if(p_or_n != NOTICE) | |
189 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /* Finish the flood grace period if theyre not messaging themselves | |
194 | * as some clients (ircN) do this as a "lag check" | |
195 | */ | |
196 | if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1])) | |
197 | flood_endgrace(source_p); | |
198 | ||
199 | if(build_target_list(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0) | |
200 | { | |
201 | return 0; | |
202 | } | |
203 | ||
204 | for(i = 0; i < ntargets; i++) | |
205 | { | |
206 | switch (targets[i].type) | |
207 | { | |
208 | case ENTITY_CHANNEL: | |
209 | msg_channel(p_or_n, command, client_p, source_p, | |
210 | (struct Channel *) targets[i].ptr, parv[2]); | |
211 | break; | |
212 | ||
213 | case ENTITY_CHANNEL_OPMOD: | |
214 | msg_channel_opmod(p_or_n, command, client_p, source_p, | |
215 | (struct Channel *) targets[i].ptr, parv[2]); | |
216 | break; | |
217 | ||
218 | case ENTITY_CHANOPS_ON_CHANNEL: | |
219 | msg_channel_flags(p_or_n, command, client_p, source_p, | |
220 | (struct Channel *) targets[i].ptr, | |
221 | targets[i].flags, parv[2]); | |
222 | break; | |
223 | ||
224 | case ENTITY_CLIENT: | |
225 | msg_client(p_or_n, command, source_p, | |
226 | (struct Client *) targets[i].ptr, parv[2]); | |
227 | break; | |
228 | } | |
229 | } | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | /* | |
235 | * build_target_list | |
236 | * | |
237 | * inputs - pointer to given client_p (server) | |
238 | * - pointer to given source (oper/client etc.) | |
239 | * - pointer to list of nicks/channels | |
240 | * - pointer to table to place results | |
241 | * - pointer to text (only used if source_p is an oper) | |
242 | * output - number of valid entities | |
243 | * side effects - target_table is modified to contain a list of | |
244 | * pointers to channels or clients | |
245 | * if source client is an oper | |
246 | * all the classic old bizzare oper privmsg tricks | |
247 | * are parsed and sent as is, if prefixed with $ | |
248 | * to disambiguate. | |
249 | * | |
250 | */ | |
251 | ||
252 | static int | |
253 | build_target_list(int p_or_n, const char *command, struct Client *client_p, | |
254 | struct Client *source_p, const char *nicks_channels, const char *text) | |
255 | { | |
256 | int type; | |
257 | char *p, *nick, *target_list; | |
258 | struct Channel *chptr = NULL; | |
259 | struct Client *target_p; | |
260 | ||
261 | target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */ | |
262 | ||
263 | ntargets = 0; | |
264 | ||
265 | for(nick = rb_strtok_r(target_list, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p)) | |
266 | { | |
267 | char *with_prefix; | |
268 | /* | |
269 | * channels are privmsg'd a lot more than other clients, moved up | |
270 | * here plain old channel msg? | |
271 | */ | |
272 | ||
273 | if(IsChanPrefix(*nick)) | |
274 | { | |
275 | /* ignore send of local channel to a server (should not happen) */ | |
276 | if(IsServer(client_p) && *nick == '&') | |
277 | continue; | |
278 | ||
279 | if((chptr = find_channel(nick)) != NULL) | |
280 | { | |
281 | if(!duplicate_ptr(chptr)) | |
282 | { | |
283 | if(ntargets >= ConfigFileEntry.max_targets) | |
284 | { | |
285 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
286 | me.name, source_p->name, nick); | |
287 | return (1); | |
288 | } | |
289 | targets[ntargets].ptr = (void *) chptr; | |
290 | targets[ntargets++].type = ENTITY_CHANNEL; | |
291 | } | |
292 | } | |
293 | ||
294 | /* non existant channel */ | |
295 | else if(p_or_n != NOTICE) | |
296 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
297 | form_str(ERR_NOSUCHNICK), nick); | |
298 | ||
299 | continue; | |
300 | } | |
301 | ||
302 | if(MyClient(source_p)) | |
303 | target_p = find_named_person(nick); | |
304 | else | |
305 | target_p = find_person(nick); | |
306 | ||
307 | /* look for a privmsg to another client */ | |
308 | if(target_p) | |
309 | { | |
310 | if(!duplicate_ptr(target_p)) | |
311 | { | |
312 | if(ntargets >= ConfigFileEntry.max_targets) | |
313 | { | |
314 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
315 | me.name, source_p->name, nick); | |
316 | return (1); | |
317 | } | |
318 | targets[ntargets].ptr = (void *) target_p; | |
319 | targets[ntargets].type = ENTITY_CLIENT; | |
320 | targets[ntargets++].flags = 0; | |
321 | } | |
322 | continue; | |
323 | } | |
324 | ||
325 | /* @#channel or +#channel message ? */ | |
326 | ||
327 | type = 0; | |
328 | with_prefix = nick; | |
329 | /* allow %+@ if someone wants to do that */ | |
330 | for(;;) | |
331 | { | |
332 | if(*nick == '@') | |
333 | type |= CHFL_CHANOP; | |
334 | else if(*nick == '+') | |
335 | type |= CHFL_CHANOP | CHFL_VOICE; | |
336 | else | |
337 | break; | |
338 | nick++; | |
339 | } | |
340 | ||
341 | if(type != 0) | |
342 | { | |
343 | /* no recipient.. */ | |
344 | if(EmptyString(nick)) | |
345 | { | |
346 | sendto_one(source_p, form_str(ERR_NORECIPIENT), | |
347 | me.name, source_p->name, command); | |
348 | continue; | |
349 | } | |
350 | ||
351 | /* At this point, nick+1 should be a channel name i.e. #foo or &foo | |
352 | * if the channel is found, fine, if not report an error | |
353 | */ | |
354 | ||
355 | if((chptr = find_channel(nick)) != NULL) | |
356 | { | |
357 | struct membership *msptr; | |
358 | ||
359 | msptr = find_channel_membership(chptr, source_p); | |
360 | ||
361 | if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr)) | |
362 | { | |
363 | sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED), | |
364 | me.name, source_p->name, with_prefix); | |
365 | return (-1); | |
366 | } | |
367 | ||
368 | if(!duplicate_ptr(chptr)) | |
369 | { | |
370 | if(ntargets >= ConfigFileEntry.max_targets) | |
371 | { | |
372 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
373 | me.name, source_p->name, nick); | |
374 | return (1); | |
375 | } | |
376 | targets[ntargets].ptr = (void *) chptr; | |
377 | targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL; | |
378 | targets[ntargets++].flags = type; | |
379 | } | |
380 | } | |
381 | else if(p_or_n != NOTICE) | |
382 | { | |
383 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
384 | form_str(ERR_NOSUCHNICK), nick); | |
385 | } | |
386 | ||
387 | continue; | |
388 | } | |
389 | ||
390 | if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$'))) | |
391 | { | |
392 | handle_special(p_or_n, command, client_p, source_p, nick, text); | |
393 | continue; | |
394 | } | |
395 | ||
396 | if(IsServer(client_p) && *nick == '=' && nick[1] == '#') | |
397 | { | |
398 | nick++; | |
399 | if((chptr = find_channel(nick)) != NULL) | |
400 | { | |
401 | if(!duplicate_ptr(chptr)) | |
402 | { | |
403 | if(ntargets >= ConfigFileEntry.max_targets) | |
404 | { | |
405 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
406 | me.name, source_p->name, nick); | |
407 | return (1); | |
408 | } | |
409 | targets[ntargets].ptr = (void *) chptr; | |
410 | targets[ntargets++].type = ENTITY_CHANNEL_OPMOD; | |
411 | } | |
412 | } | |
413 | ||
414 | /* non existant channel */ | |
415 | else if(p_or_n != NOTICE) | |
416 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
417 | form_str(ERR_NOSUCHNICK), nick); | |
418 | ||
419 | continue; | |
420 | } | |
421 | ||
422 | /* no matching anything found - error if not NOTICE */ | |
423 | if(p_or_n != NOTICE) | |
424 | { | |
425 | /* dont give this numeric when source is local, | |
426 | * because its misleading --anfl | |
427 | */ | |
428 | if(!MyClient(source_p) && IsDigit(*nick)) | |
429 | sendto_one(source_p, ":%s %d %s * :Target left IRC. " | |
430 | "Failed to deliver: [%.20s]", | |
431 | get_id(&me, source_p), ERR_NOSUCHNICK, | |
432 | get_id(source_p, source_p), text); | |
433 | else | |
434 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
435 | form_str(ERR_NOSUCHNICK), nick); | |
436 | } | |
437 | ||
438 | } | |
439 | return (1); | |
440 | } | |
441 | ||
442 | /* | |
443 | * duplicate_ptr | |
444 | * | |
445 | * inputs - pointer to check | |
446 | * - pointer to table of entities | |
447 | * - number of valid entities so far | |
448 | * output - YES if duplicate pointer in table, NO if not. | |
449 | * note, this does the canonize using pointers | |
450 | * side effects - NONE | |
451 | */ | |
452 | static int | |
453 | duplicate_ptr(void *ptr) | |
454 | { | |
455 | int i; | |
456 | for(i = 0; i < ntargets; i++) | |
457 | if(targets[i].ptr == ptr) | |
458 | return YES; | |
459 | return NO; | |
460 | } | |
461 | ||
462 | /* | |
463 | * msg_channel | |
464 | * | |
465 | * inputs - flag privmsg or notice | |
466 | * - pointer to command "PRIVMSG" or "NOTICE" | |
467 | * - pointer to client_p | |
468 | * - pointer to source_p | |
469 | * - pointer to channel | |
470 | * output - NONE | |
471 | * side effects - message given channel | |
472 | * | |
473 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
474 | */ | |
475 | static void | |
476 | msg_channel(int p_or_n, const char *command, | |
477 | struct Client *client_p, struct Client *source_p, struct Channel *chptr, | |
478 | const char *text) | |
479 | { | |
480 | int result; | |
481 | char text2[BUFSIZE]; | |
482 | ||
483 | if(MyClient(source_p)) | |
484 | { | |
485 | /* idle time shouldnt be reset by notices --fl */ | |
486 | if(p_or_n != NOTICE) | |
487 | source_p->localClient->last = rb_current_time(); | |
488 | } | |
489 | ||
490 | if(chptr->mode.mode & MODE_NOCOLOR) | |
491 | { | |
492 | rb_strlcpy(text2, text, BUFSIZE); | |
493 | strip_colour(text2); | |
494 | text = text2; | |
495 | if (EmptyString(text)) | |
496 | { | |
497 | /* could be empty after colour stripping and | |
498 | * that would cause problems later */ | |
499 | if(p_or_n != NOTICE) | |
500 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
501 | return; | |
502 | } | |
503 | } | |
504 | ||
505 | /* chanops and voiced can flood their own channel with impunity */ | |
506 | if((result = can_send(chptr, source_p, NULL))) | |
507 | { | |
508 | if(result == CAN_SEND_OPV || | |
509 | !flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
510 | { | |
511 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, | |
512 | "%s %s :%s", command, chptr->chname, text); | |
513 | } | |
514 | } | |
515 | else if(chptr->mode.mode & MODE_OPMODERATE && | |
516 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || | |
517 | IsMember(source_p, chptr))) | |
518 | { | |
519 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
520 | { | |
521 | sendto_channel_opmod(client_p, source_p, chptr, | |
522 | command, text); | |
523 | } | |
524 | } | |
525 | else | |
526 | { | |
527 | if(p_or_n != NOTICE) | |
528 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
529 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
530 | } | |
531 | } | |
532 | /* | |
533 | * msg_channel_opmod | |
534 | * | |
535 | * inputs - flag privmsg or notice | |
536 | * - pointer to command "PRIVMSG" or "NOTICE" | |
537 | * - pointer to client_p | |
538 | * - pointer to source_p | |
539 | * - pointer to channel | |
540 | * output - NONE | |
541 | * side effects - message given channel ops | |
542 | * | |
543 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
544 | */ | |
545 | static void | |
546 | msg_channel_opmod(int p_or_n, const char *command, | |
547 | struct Client *client_p, struct Client *source_p, | |
548 | struct Channel *chptr, const char *text) | |
549 | { | |
550 | char text2[BUFSIZE]; | |
551 | ||
552 | if(chptr->mode.mode & MODE_NOCOLOR) | |
553 | { | |
554 | rb_strlcpy(text2, text, BUFSIZE); | |
555 | strip_colour(text2); | |
556 | text = text2; | |
557 | if (EmptyString(text)) | |
558 | { | |
559 | /* could be empty after colour stripping and | |
560 | * that would cause problems later */ | |
561 | if(p_or_n != NOTICE) | |
562 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
563 | return; | |
564 | } | |
565 | } | |
566 | ||
567 | if(chptr->mode.mode & MODE_OPMODERATE && | |
568 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || | |
569 | IsMember(source_p, chptr))) | |
570 | { | |
571 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
572 | { | |
573 | sendto_channel_opmod(client_p, source_p, chptr, | |
574 | command, text); | |
575 | } | |
576 | } | |
577 | else | |
578 | { | |
579 | if(p_or_n != NOTICE) | |
580 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
581 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
582 | } | |
583 | } | |
584 | ||
585 | /* | |
586 | * msg_channel_flags | |
587 | * | |
588 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
589 | * say NOTICE must not auto reply | |
590 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
591 | * - pointer to client_p | |
592 | * - pointer to source_p | |
593 | * - pointer to channel | |
594 | * - flags | |
595 | * - pointer to text to send | |
596 | * output - NONE | |
597 | * side effects - message given channel either chanop or voice | |
598 | */ | |
599 | static void | |
600 | msg_channel_flags(int p_or_n, const char *command, struct Client *client_p, | |
601 | struct Client *source_p, struct Channel *chptr, int flags, const char *text) | |
602 | { | |
603 | int type; | |
604 | char c; | |
605 | ||
606 | if(flags & CHFL_VOICE) | |
607 | { | |
608 | type = ONLY_CHANOPSVOICED; | |
609 | c = '+'; | |
610 | } | |
611 | else | |
612 | { | |
613 | type = ONLY_CHANOPS; | |
614 | c = '@'; | |
615 | } | |
616 | ||
617 | if(MyClient(source_p)) | |
618 | { | |
619 | /* idletime shouldnt be reset by notice --fl */ | |
620 | if(p_or_n != NOTICE) | |
621 | source_p->localClient->last = rb_current_time(); | |
622 | } | |
623 | ||
624 | sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s", | |
625 | command, c, chptr->chname, text); | |
626 | } | |
627 | ||
628 | #define PREV_FREE_TARGET(x) ((FREE_TARGET(x) == 0) ? 9 : FREE_TARGET(x) - 1) | |
629 | #define PREV_TARGET(i) ((i == 0) ? i = 9 : --i) | |
630 | #define NEXT_TARGET(i) ((i == 9) ? i = 0 : ++i) | |
631 | ||
632 | static void | |
633 | expire_tgchange(void *unused) | |
634 | { | |
635 | tgchange *target; | |
636 | rb_dlink_node *ptr, *next_ptr; | |
637 | ||
638 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head) | |
639 | { | |
640 | target = ptr->data; | |
641 | ||
642 | if(target->expiry < rb_current_time()) | |
643 | { | |
644 | rb_dlinkDelete(ptr, &tgchange_list); | |
645 | rb_patricia_remove(tgchange_tree, target->pnode); | |
646 | rb_free(target->ip); | |
647 | rb_free(target); | |
648 | } | |
649 | } | |
650 | } | |
651 | ||
652 | static int | |
653 | add_target(struct Client *source_p, struct Client *target_p) | |
654 | { | |
655 | int i, j; | |
656 | uint32_t hashv; | |
657 | ||
658 | /* can msg themselves or services without using any target slots */ | |
659 | if(source_p == target_p || IsService(target_p)) | |
660 | return 1; | |
661 | ||
662 | /* special condition for those who have had PRIVMSG crippled to allow them | |
663 | * to talk to IRCops still. | |
664 | * | |
665 | * XXX: is this controversial? | |
666 | */ | |
667 | if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p)) | |
668 | return 1; | |
669 | ||
670 | hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32); | |
671 | ||
672 | if(USED_TARGETS(source_p)) | |
673 | { | |
674 | /* hunt for an existing target */ | |
675 | for(i = PREV_FREE_TARGET(source_p), j = USED_TARGETS(source_p); | |
676 | j; --j, PREV_TARGET(i)) | |
677 | { | |
678 | if(source_p->localClient->targets[i] == hashv) | |
679 | return 1; | |
680 | } | |
681 | ||
682 | /* first message after connect, we may only start clearing | |
683 | * slots after this message --anfl | |
684 | */ | |
685 | if(!IsTGChange(source_p)) | |
686 | { | |
687 | SetTGChange(source_p); | |
688 | source_p->localClient->target_last = rb_current_time(); | |
689 | } | |
690 | /* clear as many targets as we can */ | |
691 | else if((i = (rb_current_time() - source_p->localClient->target_last) / 60)) | |
692 | { | |
693 | if(i > USED_TARGETS(source_p)) | |
694 | USED_TARGETS(source_p) = 0; | |
695 | else | |
696 | USED_TARGETS(source_p) -= i; | |
697 | ||
698 | source_p->localClient->target_last = rb_current_time(); | |
699 | } | |
700 | /* cant clear any, full target list */ | |
701 | else if(USED_TARGETS(source_p) == 10) | |
702 | { | |
703 | ServerStats.is_tgch++; | |
704 | add_tgchange(source_p->sockhost); | |
705 | return 0; | |
706 | } | |
707 | } | |
708 | /* no targets in use, reset their target_last so that they cant | |
709 | * abuse a long idle to get targets back more quickly | |
710 | */ | |
711 | else | |
712 | { | |
713 | source_p->localClient->target_last = rb_current_time(); | |
714 | SetTGChange(source_p); | |
715 | } | |
716 | ||
717 | source_p->localClient->targets[FREE_TARGET(source_p)] = hashv; | |
718 | NEXT_TARGET(FREE_TARGET(source_p)); | |
719 | ++USED_TARGETS(source_p); | |
720 | return 1; | |
721 | } | |
722 | ||
723 | /* | |
724 | * msg_client | |
725 | * | |
726 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
727 | * say NOTICE must not auto reply | |
728 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
729 | * - pointer to source_p source (struct Client *) | |
730 | * - pointer to target_p target (struct Client *) | |
731 | * - pointer to text | |
732 | * output - NONE | |
733 | * side effects - message given channel either chanop or voice | |
734 | */ | |
735 | static void | |
736 | msg_client(int p_or_n, const char *command, | |
737 | struct Client *source_p, struct Client *target_p, const char *text) | |
738 | { | |
739 | int do_floodcount = 0; | |
740 | ||
741 | if(MyClient(source_p)) | |
742 | { | |
743 | /* reset idle time for message only if its not to self | |
744 | * and its not a notice */ | |
745 | if(p_or_n != NOTICE) | |
746 | source_p->localClient->last = rb_current_time(); | |
747 | ||
748 | /* auto cprivmsg/cnotice */ | |
749 | do_floodcount = !IsOper(source_p) && | |
750 | !find_allowing_channel(source_p, target_p); | |
751 | ||
752 | /* target change stuff, dont limit ctcp replies as that | |
753 | * would allow people to start filling up random users | |
754 | * targets just by ctcping them | |
755 | */ | |
756 | if((p_or_n != NOTICE || *text != '\001') && | |
757 | ConfigFileEntry.target_change && do_floodcount) | |
758 | { | |
759 | if(!add_target(source_p, target_p)) | |
760 | { | |
761 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
762 | me.name, source_p->name, target_p->name); | |
763 | return; | |
764 | } | |
765 | } | |
766 | } | |
767 | else if(source_p->from == target_p->from) | |
768 | { | |
769 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
770 | "Send message to %s[%s] dropped from %s(Fake Dir)", | |
771 | target_p->name, target_p->from->name, source_p->name); | |
772 | return; | |
773 | } | |
774 | ||
775 | if(MyConnect(source_p) && (p_or_n != NOTICE) && target_p->user && target_p->user->away) | |
776 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
777 | target_p->name, target_p->user->away); | |
778 | ||
779 | if(MyClient(target_p)) | |
780 | { | |
781 | /* XXX Controversial? allow opers always to send through a +g */ | |
782 | if(!IsServer(source_p) && (IsSetCallerId(target_p) || | |
783 | (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]))) | |
784 | { | |
785 | /* Here is the anti-flood bot/spambot code -db */ | |
786 | if(accept_message(source_p, target_p) || IsOper(source_p)) | |
787 | { | |
788 | sendto_one(target_p, ":%s!%s@%s %s %s :%s", | |
789 | source_p->name, | |
790 | source_p->username, | |
791 | source_p->host, command, target_p->name, text); | |
792 | } | |
793 | else if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]) | |
794 | { | |
795 | if (p_or_n != NOTICE) | |
796 | sendto_one_numeric(source_p, ERR_NONONREG, | |
797 | form_str(ERR_NONONREG), | |
798 | target_p->name); | |
799 | /* Only so opers can watch for floods */ | |
800 | if (do_floodcount) | |
801 | (void) flood_attack_client(p_or_n, source_p, target_p); | |
802 | } | |
803 | else | |
804 | { | |
805 | /* check for accept, flag recipient incoming message */ | |
806 | if(p_or_n != NOTICE) | |
807 | { | |
808 | sendto_one_numeric(source_p, ERR_TARGUMODEG, | |
809 | form_str(ERR_TARGUMODEG), | |
810 | target_p->name); | |
811 | } | |
812 | ||
813 | if((target_p->localClient->last_caller_id_time + | |
814 | ConfigFileEntry.caller_id_wait) < rb_current_time()) | |
815 | { | |
816 | if(p_or_n != NOTICE) | |
817 | sendto_one_numeric(source_p, RPL_TARGNOTIFY, | |
818 | form_str(RPL_TARGNOTIFY), | |
819 | target_p->name); | |
820 | ||
821 | sendto_one(target_p, form_str(RPL_UMODEGMSG), | |
822 | me.name, target_p->name, source_p->name, | |
823 | source_p->username, source_p->host); | |
824 | ||
825 | target_p->localClient->last_caller_id_time = rb_current_time(); | |
826 | } | |
827 | /* Only so opers can watch for floods */ | |
828 | if (do_floodcount) | |
829 | (void) flood_attack_client(p_or_n, source_p, target_p); | |
830 | } | |
831 | } | |
832 | else | |
833 | { | |
834 | /* If the client is remote, we dont perform a special check for | |
835 | * flooding.. as we wouldnt block their message anyway.. this means | |
836 | * we dont give warnings.. we then check if theyre opered | |
837 | * (to avoid flood warnings), lastly if theyre our client | |
838 | * and flooding -- fl */ | |
839 | if(!do_floodcount || | |
840 | !flood_attack_client(p_or_n, source_p, target_p)) | |
841 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
842 | } | |
843 | } | |
844 | else if(!do_floodcount || | |
845 | !flood_attack_client(p_or_n, source_p, target_p)) | |
846 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
847 | ||
848 | return; | |
849 | } | |
850 | ||
851 | static struct Channel * | |
852 | find_allowing_channel(struct Client *source_p, struct Client *target_p) | |
853 | { | |
854 | rb_dlink_node *ptr; | |
855 | struct membership *msptr; | |
856 | ||
857 | RB_DLINK_FOREACH(ptr, source_p->user->channel.head) | |
858 | { | |
859 | msptr = ptr->data; | |
860 | if (is_chanop_voiced(msptr) && IsMember(target_p, msptr->chptr)) | |
861 | return msptr->chptr; | |
862 | } | |
863 | return NULL; | |
864 | } | |
865 | ||
866 | /* | |
867 | * flood_attack_client | |
868 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
869 | * say NOTICE must not auto reply | |
870 | * - pointer to source Client | |
871 | * - pointer to target Client | |
872 | * output - 1 if target is under flood attack | |
873 | * side effects - check for flood attack on target target_p | |
874 | */ | |
875 | static int | |
876 | flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p) | |
877 | { | |
878 | int delta; | |
879 | ||
880 | /* Services could get many messages legitimately and | |
881 | * can be messaged without rate limiting via aliases | |
882 | * and msg user@server. | |
883 | * -- jilles | |
884 | */ | |
885 | if(GlobalSetOptions.floodcount && IsClient(source_p) && source_p != target_p && !IsService(target_p)) | |
886 | { | |
887 | if((target_p->first_received_message_time + 1) < rb_current_time()) | |
888 | { | |
889 | delta = rb_current_time() - target_p->first_received_message_time; | |
890 | target_p->received_number_of_privmsgs -= delta; | |
891 | target_p->first_received_message_time = rb_current_time(); | |
892 | if(target_p->received_number_of_privmsgs <= 0) | |
893 | { | |
894 | target_p->received_number_of_privmsgs = 0; | |
895 | target_p->flood_noticed = 0; | |
896 | } | |
897 | } | |
898 | ||
899 | if((target_p->received_number_of_privmsgs >= | |
900 | GlobalSetOptions.floodcount) || target_p->flood_noticed) | |
901 | { | |
902 | if(target_p->flood_noticed == 0) | |
903 | { | |
904 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, | |
905 | "Possible Flooder %s[%s@%s] on %s target: %s", | |
906 | source_p->name, source_p->username, | |
907 | source_p->orighost, | |
908 | source_p->servptr->name, target_p->name); | |
909 | target_p->flood_noticed = 1; | |
910 | /* add a bit of penalty */ | |
911 | target_p->received_number_of_privmsgs += 2; | |
912 | } | |
913 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
914 | sendto_one(source_p, | |
915 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
916 | me.name, source_p->name, target_p->name); | |
917 | return 1; | |
918 | } | |
919 | else | |
920 | target_p->received_number_of_privmsgs++; | |
921 | } | |
922 | ||
923 | return 0; | |
924 | } | |
925 | ||
926 | /* | |
927 | * flood_attack_channel | |
928 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
929 | * says NOTICE must not auto reply | |
930 | * - pointer to source Client | |
931 | * - pointer to target channel | |
932 | * output - 1 if target is under flood attack | |
933 | * side effects - check for flood attack on target chptr | |
934 | */ | |
935 | static int | |
936 | flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname) | |
937 | { | |
938 | int delta; | |
939 | ||
940 | if(GlobalSetOptions.floodcount && MyClient(source_p)) | |
941 | { | |
942 | if((chptr->first_received_message_time + 1) < rb_current_time()) | |
943 | { | |
944 | delta = rb_current_time() - chptr->first_received_message_time; | |
945 | chptr->received_number_of_privmsgs -= delta; | |
946 | chptr->first_received_message_time = rb_current_time(); | |
947 | if(chptr->received_number_of_privmsgs <= 0) | |
948 | { | |
949 | chptr->received_number_of_privmsgs = 0; | |
950 | chptr->flood_noticed = 0; | |
951 | } | |
952 | } | |
953 | ||
954 | if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount) | |
955 | || chptr->flood_noticed) | |
956 | { | |
957 | if(chptr->flood_noticed == 0) | |
958 | { | |
959 | sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE, | |
960 | "Possible Flooder %s[%s@%s] on %s target: %s", | |
961 | source_p->name, source_p->username, | |
962 | source_p->orighost, | |
963 | source_p->servptr->name, chptr->chname); | |
964 | chptr->flood_noticed = 1; | |
965 | ||
966 | /* Add a bit of penalty */ | |
967 | chptr->received_number_of_privmsgs += 2; | |
968 | } | |
969 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
970 | sendto_one(source_p, | |
971 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
972 | me.name, source_p->name, chptr->chname); | |
973 | return 1; | |
974 | } | |
975 | else | |
976 | chptr->received_number_of_privmsgs++; | |
977 | } | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
982 | ||
983 | /* | |
984 | * handle_special | |
985 | * | |
986 | * inputs - server pointer | |
987 | * - client pointer | |
988 | * - nick stuff to grok for opers | |
989 | * - text to send if grok | |
990 | * output - none | |
991 | * side effects - all the traditional oper type messages are parsed here. | |
992 | * i.e. "/msg #some.host." | |
993 | * However, syntax has been changed. | |
994 | * previous syntax "/msg #some.host.mask" | |
995 | * now becomes "/msg $#some.host.mask" | |
996 | * previous syntax of: "/msg $some.server.mask" remains | |
997 | * This disambiguates the syntax. | |
998 | */ | |
999 | static void | |
1000 | handle_special(int p_or_n, const char *command, struct Client *client_p, | |
1001 | struct Client *source_p, const char *nick, const char *text) | |
1002 | { | |
1003 | struct Client *target_p; | |
1004 | char *server; | |
1005 | char *s; | |
1006 | ||
1007 | /* user[%host]@server addressed? | |
1008 | * NOTE: users can send to user@server, but not user%host@server | |
1009 | * or opers@server | |
1010 | */ | |
1011 | if((server = strchr(nick, '@')) != NULL) | |
1012 | { | |
1013 | if((target_p = find_server(source_p, server + 1)) == NULL) | |
1014 | { | |
1015 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
1016 | form_str(ERR_NOSUCHSERVER), server + 1); | |
1017 | return; | |
1018 | } | |
1019 | ||
1020 | if(!IsOper(source_p)) | |
1021 | { | |
1022 | if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0)) | |
1023 | { | |
1024 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
1025 | form_str(ERR_NOSUCHNICK), nick); | |
1026 | return; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | /* somewhere else.. */ | |
1031 | if(!IsMe(target_p)) | |
1032 | { | |
1033 | sendto_one(target_p, ":%s %s %s :%s", | |
1034 | get_id(source_p, target_p), command, nick, text); | |
1035 | return; | |
1036 | } | |
1037 | ||
1038 | /* Check if someones msg'ing opers@our.server */ | |
1039 | if(strncmp(nick, "opers@", 6) == 0) | |
1040 | { | |
1041 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s", | |
1042 | source_p->name, text); | |
1043 | return; | |
1044 | } | |
1045 | ||
1046 | /* This was not very useful except for bypassing certain | |
1047 | * restrictions. Note that we still allow sending to | |
1048 | * remote servers this way, for messaging pseudoservers | |
1049 | * securely whether they have a service{} block or not. | |
1050 | * -- jilles | |
1051 | */ | |
1052 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
1053 | form_str(ERR_NOSUCHNICK), nick); | |
1054 | return; | |
1055 | } | |
1056 | ||
1057 | /* | |
1058 | * the following two cases allow masks in NOTICEs | |
1059 | * (for OPERs only) | |
1060 | * | |
1061 | * Armin, 8Jun90 (gruner@informatik.tu-muenchen.de) | |
1062 | */ | |
1063 | if(IsOper(source_p) && *nick == '$') | |
1064 | { | |
1065 | if((*(nick + 1) == '$' || *(nick + 1) == '#')) | |
1066 | nick++; | |
1067 | else if(MyOper(source_p)) | |
1068 | { | |
1069 | sendto_one(source_p, | |
1070 | ":%s NOTICE %s :The command %s %s is no longer supported, please use $%s", | |
1071 | me.name, source_p->name, command, nick, nick); | |
1072 | return; | |
1073 | } | |
1074 | ||
1075 | if(MyClient(source_p) && !IsOperMassNotice(source_p)) | |
1076 | { | |
1077 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
1078 | me.name, source_p->name, "mass_notice"); | |
1079 | return; | |
1080 | } | |
1081 | ||
1082 | if((s = strrchr(nick, '.')) == NULL) | |
1083 | { | |
1084 | sendto_one_numeric(source_p, ERR_NOTOPLEVEL, | |
1085 | form_str(ERR_NOTOPLEVEL), nick); | |
1086 | return; | |
1087 | } | |
1088 | while(*++s) | |
1089 | if(*s == '.' || *s == '*' || *s == '?') | |
1090 | break; | |
1091 | if(*s == '*' || *s == '?') | |
1092 | { | |
1093 | sendto_one_numeric(source_p, ERR_WILDTOPLEVEL, | |
1094 | form_str(ERR_WILDTOPLEVEL), nick); | |
1095 | return; | |
1096 | } | |
1097 | ||
1098 | sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p, | |
1099 | nick + 1, | |
1100 | (*nick == '#') ? MATCH_HOST : MATCH_SERVER, | |
1101 | "%s $%s :%s", command, nick, text); | |
1102 | return; | |
1103 | } | |
1104 | } |