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212380e3 AC |
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 | * | |
63aecfb9 | 24 | * $Id: m_message.c 3173 2007-01-31 23:57:18Z jilles $ |
212380e3 AC |
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" | |
4562c604 | 38 | #include "match.h" |
212380e3 AC |
39 | #include "hash.h" |
40 | #include "class.h" | |
41 | #include "msg.h" | |
42 | #include "packet.h" | |
43 | #include "send.h" | |
212380e3 | 44 | #include "s_newconf.h" |
43f8445d | 45 | #include "s_stats.h" |
ab428518 | 46 | #include "inline/stringops.h" |
212380e3 AC |
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); | |
0e7cb7e6 | 53 | static struct ev_entry *expire_tgchange_event; |
212380e3 AC |
54 | |
55 | static int | |
56 | modinit(void) | |
57 | { | |
0e7cb7e6 | 58 | expire_tgchange_event = rb_event_addish("expire_tgchange", expire_tgchange, NULL, 300); |
212380e3 AC |
59 | expire_tgchange(NULL); |
60 | return 0; | |
61 | } | |
62 | ||
63 | static void | |
64 | moddeinit(void) | |
65 | { | |
0e7cb7e6 | 66 | rb_event_delete(expire_tgchange_event); |
212380e3 AC |
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 | ||
63aecfb9 | 80 | DECLARE_MODULE_AV1(message, modinit, moddeinit, message_clist, NULL, NULL, "$Revision: 3173 $"); |
212380e3 AC |
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 | ||
c2874388 | 93 | static struct Channel *find_allowing_channel(struct Client *source_p, struct Client *target_p); |
212380e3 AC |
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); | |
212380e3 | 97 | |
aa9c9ed2 JT |
98 | /* Fifteen seconds should be plenty for a client to reply a ctcp */ |
99 | #define LARGE_CTCP_TIME 15 | |
100 | ||
212380e3 AC |
101 | #define ENTITY_NONE 0 |
102 | #define ENTITY_CHANNEL 1 | |
c4d2d014 JT |
103 | #define ENTITY_CHANNEL_OPMOD 2 |
104 | #define ENTITY_CHANOPS_ON_CHANNEL 3 | |
105 | #define ENTITY_CLIENT 4 | |
212380e3 AC |
106 | |
107 | static struct entity targets[512]; | |
108 | static int ntargets = 0; | |
109 | ||
110 | static int duplicate_ptr(void *); | |
111 | ||
112 | static void msg_channel(int p_or_n, const char *command, | |
113 | struct Client *client_p, | |
114 | struct Client *source_p, struct Channel *chptr, const char *text); | |
115 | ||
c4d2d014 JT |
116 | static void msg_channel_opmod(int p_or_n, const char *command, |
117 | struct Client *client_p, | |
118 | struct Client *source_p, struct Channel *chptr, | |
119 | const char *text); | |
120 | ||
212380e3 AC |
121 | static void msg_channel_flags(int p_or_n, const char *command, |
122 | struct Client *client_p, | |
123 | struct Client *source_p, | |
124 | struct Channel *chptr, int flags, const char *text); | |
125 | ||
126 | static void msg_client(int p_or_n, const char *command, | |
127 | struct Client *source_p, struct Client *target_p, const char *text); | |
128 | ||
129 | static void handle_special(int p_or_n, const char *command, | |
130 | struct Client *client_p, struct Client *source_p, const char *nick, | |
131 | const char *text); | |
132 | ||
133 | /* | |
134 | ** m_privmsg | |
135 | ** | |
136 | ** massive cleanup | |
137 | ** rev argv 6/91 | |
138 | ** | |
139 | ** Another massive cleanup Nov, 2000 | |
140 | ** (I don't think there is a single line left from 6/91. Maybe.) | |
141 | ** m_privmsg and m_notice do basically the same thing. | |
142 | ** in the original 2.8.2 code base, they were the same function | |
143 | ** "m_message.c." When we did the great cleanup in conjuncton with bleep | |
144 | ** of ircu fame, we split m_privmsg.c and m_notice.c. | |
145 | ** I don't see the point of that now. Its harder to maintain, its | |
146 | ** easier to introduce bugs into one version and not the other etc. | |
147 | ** Really, the penalty of an extra function call isn't that big a deal folks. | |
148 | ** -db Nov 13, 2000 | |
149 | ** | |
150 | */ | |
151 | ||
152 | #define PRIVMSG 0 | |
153 | #define NOTICE 1 | |
154 | ||
155 | static int | |
156 | m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
157 | { | |
158 | return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv); | |
159 | } | |
160 | ||
161 | static int | |
162 | m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
163 | { | |
164 | return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv); | |
165 | } | |
166 | ||
167 | /* | |
168 | * inputs - flag privmsg or notice | |
169 | * - pointer to command "PRIVMSG" or "NOTICE" | |
170 | * - pointer to client_p | |
171 | * - pointer to source_p | |
172 | * - pointer to channel | |
173 | */ | |
174 | static int | |
175 | m_message(int p_or_n, | |
176 | const char *command, | |
177 | struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
178 | { | |
179 | int i; | |
180 | ||
181 | if(parc < 2 || EmptyString(parv[1])) | |
182 | { | |
183 | if(p_or_n != NOTICE) | |
184 | sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name, | |
185 | source_p->name, command); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | if(parc < 3 || EmptyString(parv[2])) | |
190 | { | |
191 | if(p_or_n != NOTICE) | |
192 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
193 | return 0; | |
194 | } | |
195 | ||
196 | /* Finish the flood grace period if theyre not messaging themselves | |
197 | * as some clients (ircN) do this as a "lag check" | |
198 | */ | |
199 | if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1])) | |
200 | flood_endgrace(source_p); | |
201 | ||
202 | if(build_target_list(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0) | |
203 | { | |
204 | return 0; | |
205 | } | |
206 | ||
207 | for(i = 0; i < ntargets; i++) | |
208 | { | |
209 | switch (targets[i].type) | |
210 | { | |
211 | case ENTITY_CHANNEL: | |
212 | msg_channel(p_or_n, command, client_p, source_p, | |
213 | (struct Channel *) targets[i].ptr, parv[2]); | |
214 | break; | |
215 | ||
c4d2d014 JT |
216 | case ENTITY_CHANNEL_OPMOD: |
217 | msg_channel_opmod(p_or_n, command, client_p, source_p, | |
218 | (struct Channel *) targets[i].ptr, parv[2]); | |
219 | break; | |
220 | ||
212380e3 AC |
221 | case ENTITY_CHANOPS_ON_CHANNEL: |
222 | msg_channel_flags(p_or_n, command, client_p, source_p, | |
223 | (struct Channel *) targets[i].ptr, | |
224 | targets[i].flags, parv[2]); | |
225 | break; | |
226 | ||
227 | case ENTITY_CLIENT: | |
228 | msg_client(p_or_n, command, source_p, | |
229 | (struct Client *) targets[i].ptr, parv[2]); | |
230 | break; | |
231 | } | |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /* | |
238 | * build_target_list | |
239 | * | |
240 | * inputs - pointer to given client_p (server) | |
241 | * - pointer to given source (oper/client etc.) | |
242 | * - pointer to list of nicks/channels | |
243 | * - pointer to table to place results | |
244 | * - pointer to text (only used if source_p is an oper) | |
245 | * output - number of valid entities | |
246 | * side effects - target_table is modified to contain a list of | |
247 | * pointers to channels or clients | |
248 | * if source client is an oper | |
249 | * all the classic old bizzare oper privmsg tricks | |
250 | * are parsed and sent as is, if prefixed with $ | |
251 | * to disambiguate. | |
252 | * | |
253 | */ | |
254 | ||
255 | static int | |
256 | build_target_list(int p_or_n, const char *command, struct Client *client_p, | |
257 | struct Client *source_p, const char *nicks_channels, const char *text) | |
258 | { | |
259 | int type; | |
260 | char *p, *nick, *target_list; | |
261 | struct Channel *chptr = NULL; | |
262 | struct Client *target_p; | |
263 | ||
264 | target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */ | |
265 | ||
266 | ntargets = 0; | |
267 | ||
4a2651e5 | 268 | for(nick = rb_strtok_r(target_list, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p)) |
212380e3 AC |
269 | { |
270 | char *with_prefix; | |
271 | /* | |
272 | * channels are privmsg'd a lot more than other clients, moved up | |
273 | * here plain old channel msg? | |
274 | */ | |
275 | ||
276 | if(IsChanPrefix(*nick)) | |
277 | { | |
278 | /* ignore send of local channel to a server (should not happen) */ | |
279 | if(IsServer(client_p) && *nick == '&') | |
280 | continue; | |
281 | ||
282 | if((chptr = find_channel(nick)) != NULL) | |
283 | { | |
284 | if(!duplicate_ptr(chptr)) | |
285 | { | |
286 | if(ntargets >= ConfigFileEntry.max_targets) | |
287 | { | |
288 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
289 | me.name, source_p->name, nick); | |
290 | return (1); | |
291 | } | |
292 | targets[ntargets].ptr = (void *) chptr; | |
293 | targets[ntargets++].type = ENTITY_CHANNEL; | |
294 | } | |
295 | } | |
296 | ||
297 | /* non existant channel */ | |
298 | else if(p_or_n != NOTICE) | |
299 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
300 | form_str(ERR_NOSUCHNICK), nick); | |
301 | ||
302 | continue; | |
303 | } | |
304 | ||
305 | if(MyClient(source_p)) | |
306 | target_p = find_named_person(nick); | |
307 | else | |
308 | target_p = find_person(nick); | |
309 | ||
310 | /* look for a privmsg to another client */ | |
311 | if(target_p) | |
312 | { | |
313 | if(!duplicate_ptr(target_p)) | |
314 | { | |
315 | if(ntargets >= ConfigFileEntry.max_targets) | |
316 | { | |
317 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
318 | me.name, source_p->name, nick); | |
319 | return (1); | |
320 | } | |
321 | targets[ntargets].ptr = (void *) target_p; | |
322 | targets[ntargets].type = ENTITY_CLIENT; | |
323 | targets[ntargets++].flags = 0; | |
324 | } | |
325 | continue; | |
326 | } | |
327 | ||
328 | /* @#channel or +#channel message ? */ | |
329 | ||
330 | type = 0; | |
331 | with_prefix = nick; | |
332 | /* allow %+@ if someone wants to do that */ | |
333 | for(;;) | |
334 | { | |
335 | if(*nick == '@') | |
336 | type |= CHFL_CHANOP; | |
337 | else if(*nick == '+') | |
338 | type |= CHFL_CHANOP | CHFL_VOICE; | |
339 | else | |
340 | break; | |
341 | nick++; | |
342 | } | |
343 | ||
344 | if(type != 0) | |
345 | { | |
346 | /* no recipient.. */ | |
347 | if(EmptyString(nick)) | |
348 | { | |
349 | sendto_one(source_p, form_str(ERR_NORECIPIENT), | |
350 | me.name, source_p->name, command); | |
351 | continue; | |
352 | } | |
353 | ||
354 | /* At this point, nick+1 should be a channel name i.e. #foo or &foo | |
355 | * if the channel is found, fine, if not report an error | |
356 | */ | |
357 | ||
358 | if((chptr = find_channel(nick)) != NULL) | |
359 | { | |
360 | struct membership *msptr; | |
361 | ||
362 | msptr = find_channel_membership(chptr, source_p); | |
363 | ||
364 | if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr)) | |
365 | { | |
366 | sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED), | |
631b4a54 JT |
367 | get_id(&me, source_p), |
368 | get_id(source_p, source_p), | |
369 | with_prefix); | |
212380e3 AC |
370 | return (-1); |
371 | } | |
372 | ||
373 | if(!duplicate_ptr(chptr)) | |
374 | { | |
375 | if(ntargets >= ConfigFileEntry.max_targets) | |
376 | { | |
377 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
378 | me.name, source_p->name, nick); | |
379 | return (1); | |
380 | } | |
381 | targets[ntargets].ptr = (void *) chptr; | |
382 | targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL; | |
383 | targets[ntargets++].flags = type; | |
384 | } | |
385 | } | |
386 | else if(p_or_n != NOTICE) | |
387 | { | |
388 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
389 | form_str(ERR_NOSUCHNICK), nick); | |
390 | } | |
391 | ||
392 | continue; | |
393 | } | |
394 | ||
395 | if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$'))) | |
396 | { | |
397 | handle_special(p_or_n, command, client_p, source_p, nick, text); | |
398 | continue; | |
399 | } | |
400 | ||
c4d2d014 JT |
401 | if(IsServer(client_p) && *nick == '=' && nick[1] == '#') |
402 | { | |
403 | nick++; | |
404 | if((chptr = find_channel(nick)) != NULL) | |
405 | { | |
406 | if(!duplicate_ptr(chptr)) | |
407 | { | |
408 | if(ntargets >= ConfigFileEntry.max_targets) | |
409 | { | |
410 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
411 | me.name, source_p->name, nick); | |
412 | return (1); | |
413 | } | |
414 | targets[ntargets].ptr = (void *) chptr; | |
415 | targets[ntargets++].type = ENTITY_CHANNEL_OPMOD; | |
416 | } | |
417 | } | |
418 | ||
419 | /* non existant channel */ | |
420 | else if(p_or_n != NOTICE) | |
421 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
422 | form_str(ERR_NOSUCHNICK), nick); | |
423 | ||
424 | continue; | |
425 | } | |
426 | ||
212380e3 AC |
427 | /* no matching anything found - error if not NOTICE */ |
428 | if(p_or_n != NOTICE) | |
429 | { | |
430 | /* dont give this numeric when source is local, | |
431 | * because its misleading --anfl | |
432 | */ | |
433 | if(!MyClient(source_p) && IsDigit(*nick)) | |
434 | sendto_one(source_p, ":%s %d %s * :Target left IRC. " | |
435 | "Failed to deliver: [%.20s]", | |
436 | get_id(&me, source_p), ERR_NOSUCHNICK, | |
437 | get_id(source_p, source_p), text); | |
438 | else | |
439 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
440 | form_str(ERR_NOSUCHNICK), nick); | |
441 | } | |
442 | ||
443 | } | |
444 | return (1); | |
445 | } | |
446 | ||
447 | /* | |
448 | * duplicate_ptr | |
449 | * | |
450 | * inputs - pointer to check | |
451 | * - pointer to table of entities | |
452 | * - number of valid entities so far | |
453 | * output - YES if duplicate pointer in table, NO if not. | |
454 | * note, this does the canonize using pointers | |
455 | * side effects - NONE | |
456 | */ | |
457 | static int | |
458 | duplicate_ptr(void *ptr) | |
459 | { | |
460 | int i; | |
461 | for(i = 0; i < ntargets; i++) | |
462 | if(targets[i].ptr == ptr) | |
463 | return YES; | |
464 | return NO; | |
465 | } | |
466 | ||
467 | /* | |
468 | * msg_channel | |
469 | * | |
470 | * inputs - flag privmsg or notice | |
471 | * - pointer to command "PRIVMSG" or "NOTICE" | |
472 | * - pointer to client_p | |
473 | * - pointer to source_p | |
474 | * - pointer to channel | |
475 | * output - NONE | |
476 | * side effects - message given channel | |
477 | * | |
478 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
479 | */ | |
480 | static void | |
481 | msg_channel(int p_or_n, const char *command, | |
482 | struct Client *client_p, struct Client *source_p, struct Channel *chptr, | |
483 | const char *text) | |
484 | { | |
485 | int result; | |
486 | char text2[BUFSIZE]; | |
487 | ||
488 | if(MyClient(source_p)) | |
489 | { | |
490 | /* idle time shouldnt be reset by notices --fl */ | |
491 | if(p_or_n != NOTICE) | |
e3354945 | 492 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
493 | } |
494 | ||
495 | if(chptr->mode.mode & MODE_NOCOLOR) | |
496 | { | |
f427c8b0 | 497 | rb_strlcpy(text2, text, BUFSIZE); |
212380e3 AC |
498 | strip_colour(text2); |
499 | text = text2; | |
500 | if (EmptyString(text)) | |
501 | { | |
502 | /* could be empty after colour stripping and | |
503 | * that would cause problems later */ | |
504 | if(p_or_n != NOTICE) | |
505 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
506 | return; | |
507 | } | |
508 | } | |
509 | ||
510 | /* chanops and voiced can flood their own channel with impunity */ | |
511 | if((result = can_send(chptr, source_p, NULL))) | |
512 | { | |
513 | if(result == CAN_SEND_OPV || | |
514 | !flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
515 | { | |
516 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, | |
517 | "%s %s :%s", command, chptr->chname, text); | |
aa9c9ed2 JT |
518 | if (p_or_n != NOTICE && *text == '\001' && |
519 | rb_dlink_list_length(&chptr->locmembers) > (unsigned)(GlobalSetOptions.floodcount / 2)) | |
520 | source_p->large_ctcp_sent = rb_current_time(); | |
212380e3 AC |
521 | } |
522 | } | |
523 | else if(chptr->mode.mode & MODE_OPMODERATE && | |
8feca176 JT |
524 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || |
525 | IsMember(source_p, chptr))) | |
212380e3 | 526 | { |
212380e3 AC |
527 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) |
528 | { | |
c4d2d014 JT |
529 | sendto_channel_opmod(client_p, source_p, chptr, |
530 | command, text); | |
531 | } | |
532 | } | |
533 | else | |
534 | { | |
535 | if(p_or_n != NOTICE) | |
536 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
537 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
538 | } | |
539 | } | |
540 | /* | |
541 | * msg_channel_opmod | |
542 | * | |
543 | * inputs - flag privmsg or notice | |
544 | * - pointer to command "PRIVMSG" or "NOTICE" | |
545 | * - pointer to client_p | |
546 | * - pointer to source_p | |
547 | * - pointer to channel | |
548 | * output - NONE | |
549 | * side effects - message given channel ops | |
550 | * | |
551 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
552 | */ | |
553 | static void | |
554 | msg_channel_opmod(int p_or_n, const char *command, | |
555 | struct Client *client_p, struct Client *source_p, | |
556 | struct Channel *chptr, const char *text) | |
557 | { | |
558 | char text2[BUFSIZE]; | |
559 | ||
560 | if(chptr->mode.mode & MODE_NOCOLOR) | |
561 | { | |
562 | rb_strlcpy(text2, text, BUFSIZE); | |
563 | strip_colour(text2); | |
564 | text = text2; | |
565 | if (EmptyString(text)) | |
566 | { | |
567 | /* could be empty after colour stripping and | |
568 | * that would cause problems later */ | |
569 | if(p_or_n != NOTICE) | |
570 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
571 | return; | |
572 | } | |
573 | } | |
574 | ||
575 | if(chptr->mode.mode & MODE_OPMODERATE && | |
576 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || | |
577 | IsMember(source_p, chptr))) | |
578 | { | |
579 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
580 | { | |
581 | sendto_channel_opmod(client_p, source_p, chptr, | |
582 | command, text); | |
212380e3 AC |
583 | } |
584 | } | |
585 | else | |
586 | { | |
587 | if(p_or_n != NOTICE) | |
588 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
589 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
590 | } | |
591 | } | |
592 | ||
593 | /* | |
594 | * msg_channel_flags | |
595 | * | |
596 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
597 | * say NOTICE must not auto reply | |
598 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
599 | * - pointer to client_p | |
600 | * - pointer to source_p | |
601 | * - pointer to channel | |
602 | * - flags | |
603 | * - pointer to text to send | |
604 | * output - NONE | |
605 | * side effects - message given channel either chanop or voice | |
606 | */ | |
607 | static void | |
608 | msg_channel_flags(int p_or_n, const char *command, struct Client *client_p, | |
609 | struct Client *source_p, struct Channel *chptr, int flags, const char *text) | |
610 | { | |
611 | int type; | |
612 | char c; | |
613 | ||
614 | if(flags & CHFL_VOICE) | |
615 | { | |
616 | type = ONLY_CHANOPSVOICED; | |
617 | c = '+'; | |
618 | } | |
619 | else | |
620 | { | |
621 | type = ONLY_CHANOPS; | |
622 | c = '@'; | |
623 | } | |
624 | ||
625 | if(MyClient(source_p)) | |
626 | { | |
627 | /* idletime shouldnt be reset by notice --fl */ | |
628 | if(p_or_n != NOTICE) | |
e3354945 | 629 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
630 | } |
631 | ||
632 | sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s", | |
633 | command, c, chptr->chname, text); | |
634 | } | |
635 | ||
636 | #define PREV_FREE_TARGET(x) ((FREE_TARGET(x) == 0) ? 9 : FREE_TARGET(x) - 1) | |
637 | #define PREV_TARGET(i) ((i == 0) ? i = 9 : --i) | |
638 | #define NEXT_TARGET(i) ((i == 9) ? i = 0 : ++i) | |
639 | ||
640 | static void | |
641 | expire_tgchange(void *unused) | |
642 | { | |
643 | tgchange *target; | |
637c4932 | 644 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 645 | |
637c4932 | 646 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head) |
212380e3 AC |
647 | { |
648 | target = ptr->data; | |
649 | ||
e3354945 | 650 | if(target->expiry < rb_current_time()) |
212380e3 | 651 | { |
ba200635 AC |
652 | rb_dlinkDelete(ptr, &tgchange_list); |
653 | rb_patricia_remove(tgchange_tree, target->pnode); | |
bd198292 VY |
654 | rb_free(target->ip); |
655 | rb_free(target); | |
212380e3 AC |
656 | } |
657 | } | |
658 | } | |
659 | ||
ae78a571 VY |
660 | static int |
661 | add_target(struct Client *source_p, struct Client *target_p) | |
662 | { | |
663 | int i, j; | |
664 | uint32_t hashv; | |
665 | ||
666 | /* can msg themselves or services without using any target slots */ | |
667 | if(source_p == target_p || IsService(target_p)) | |
668 | return 1; | |
669 | ||
670 | /* special condition for those who have had PRIVMSG crippled to allow them | |
671 | * to talk to IRCops still. | |
672 | * | |
673 | * XXX: is this controversial? | |
674 | */ | |
675 | if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p)) | |
676 | return 1; | |
677 | ||
678 | hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32); | |
679 | ||
680 | if(USED_TARGETS(source_p)) | |
681 | { | |
682 | /* hunt for an existing target */ | |
683 | for(i = PREV_FREE_TARGET(source_p), j = USED_TARGETS(source_p); | |
684 | j; --j, PREV_TARGET(i)) | |
685 | { | |
686 | if(source_p->localClient->targets[i] == hashv) | |
687 | return 1; | |
688 | } | |
689 | ||
690 | /* first message after connect, we may only start clearing | |
691 | * slots after this message --anfl | |
692 | */ | |
693 | if(!IsTGChange(source_p)) | |
694 | { | |
695 | SetTGChange(source_p); | |
696 | source_p->localClient->target_last = rb_current_time(); | |
697 | } | |
698 | /* clear as many targets as we can */ | |
699 | else if((i = (rb_current_time() - source_p->localClient->target_last) / 60)) | |
700 | { | |
701 | if(i > USED_TARGETS(source_p)) | |
702 | USED_TARGETS(source_p) = 0; | |
703 | else | |
704 | USED_TARGETS(source_p) -= i; | |
705 | ||
706 | source_p->localClient->target_last = rb_current_time(); | |
707 | } | |
708 | /* cant clear any, full target list */ | |
709 | else if(USED_TARGETS(source_p) == 10) | |
710 | { | |
47adde3d | 711 | ServerStats.is_tgch++; |
ae78a571 VY |
712 | add_tgchange(source_p->sockhost); |
713 | return 0; | |
714 | } | |
715 | } | |
716 | /* no targets in use, reset their target_last so that they cant | |
717 | * abuse a long idle to get targets back more quickly | |
718 | */ | |
719 | else | |
720 | { | |
721 | source_p->localClient->target_last = rb_current_time(); | |
722 | SetTGChange(source_p); | |
723 | } | |
724 | ||
725 | source_p->localClient->targets[FREE_TARGET(source_p)] = hashv; | |
726 | NEXT_TARGET(FREE_TARGET(source_p)); | |
727 | ++USED_TARGETS(source_p); | |
728 | return 1; | |
212380e3 AC |
729 | } |
730 | ||
731 | /* | |
732 | * msg_client | |
733 | * | |
734 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
735 | * say NOTICE must not auto reply | |
736 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
737 | * - pointer to source_p source (struct Client *) | |
738 | * - pointer to target_p target (struct Client *) | |
739 | * - pointer to text | |
740 | * output - NONE | |
741 | * side effects - message given channel either chanop or voice | |
742 | */ | |
743 | static void | |
744 | msg_client(int p_or_n, const char *command, | |
745 | struct Client *source_p, struct Client *target_p, const char *text) | |
746 | { | |
c2874388 JT |
747 | int do_floodcount = 0; |
748 | ||
212380e3 AC |
749 | if(MyClient(source_p)) |
750 | { | |
751 | /* reset idle time for message only if its not to self | |
752 | * and its not a notice */ | |
753 | if(p_or_n != NOTICE) | |
e3354945 | 754 | source_p->localClient->last = rb_current_time(); |
212380e3 | 755 | |
c2874388 JT |
756 | /* auto cprivmsg/cnotice */ |
757 | do_floodcount = !IsOper(source_p) && | |
758 | !find_allowing_channel(source_p, target_p); | |
759 | ||
212380e3 AC |
760 | /* target change stuff, dont limit ctcp replies as that |
761 | * would allow people to start filling up random users | |
762 | * targets just by ctcping them | |
763 | */ | |
764 | if((p_or_n != NOTICE || *text != '\001') && | |
c2874388 | 765 | ConfigFileEntry.target_change && do_floodcount) |
212380e3 AC |
766 | { |
767 | if(!add_target(source_p, target_p)) | |
768 | { | |
769 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
770 | me.name, source_p->name, target_p->name); | |
771 | return; | |
772 | } | |
773 | } | |
b7b1d686 | 774 | |
aa9c9ed2 JT |
775 | if (do_floodcount && p_or_n == NOTICE && *text == '\001' && |
776 | target_p->large_ctcp_sent + LARGE_CTCP_TIME >= rb_current_time()) | |
777 | do_floodcount = 0; | |
778 | ||
b7b1d686 JT |
779 | if (do_floodcount && |
780 | flood_attack_client(p_or_n, source_p, target_p)) | |
781 | return; | |
212380e3 AC |
782 | } |
783 | else if(source_p->from == target_p->from) | |
784 | { | |
785 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
786 | "Send message to %s[%s] dropped from %s(Fake Dir)", | |
787 | target_p->name, target_p->from->name, source_p->name); | |
788 | return; | |
789 | } | |
790 | ||
c127b45b | 791 | if(MyConnect(source_p) && (p_or_n != NOTICE) && target_p->user && target_p->user->away) |
212380e3 | 792 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), |
c127b45b | 793 | target_p->name, target_p->user->away); |
212380e3 AC |
794 | |
795 | if(MyClient(target_p)) | |
796 | { | |
797 | /* XXX Controversial? allow opers always to send through a +g */ | |
798 | if(!IsServer(source_p) && (IsSetCallerId(target_p) || | |
799 | (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]))) | |
800 | { | |
801 | /* Here is the anti-flood bot/spambot code -db */ | |
802 | if(accept_message(source_p, target_p) || IsOper(source_p)) | |
803 | { | |
804 | sendto_one(target_p, ":%s!%s@%s %s %s :%s", | |
805 | source_p->name, | |
806 | source_p->username, | |
807 | source_p->host, command, target_p->name, text); | |
808 | } | |
809 | else if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]) | |
810 | { | |
811 | if (p_or_n != NOTICE) | |
812 | sendto_one_numeric(source_p, ERR_NONONREG, | |
813 | form_str(ERR_NONONREG), | |
814 | target_p->name); | |
212380e3 AC |
815 | } |
816 | else | |
817 | { | |
818 | /* check for accept, flag recipient incoming message */ | |
819 | if(p_or_n != NOTICE) | |
820 | { | |
821 | sendto_one_numeric(source_p, ERR_TARGUMODEG, | |
822 | form_str(ERR_TARGUMODEG), | |
823 | target_p->name); | |
824 | } | |
825 | ||
826 | if((target_p->localClient->last_caller_id_time + | |
e3354945 | 827 | ConfigFileEntry.caller_id_wait) < rb_current_time()) |
212380e3 AC |
828 | { |
829 | if(p_or_n != NOTICE) | |
830 | sendto_one_numeric(source_p, RPL_TARGNOTIFY, | |
831 | form_str(RPL_TARGNOTIFY), | |
832 | target_p->name); | |
833 | ||
834 | sendto_one(target_p, form_str(RPL_UMODEGMSG), | |
835 | me.name, target_p->name, source_p->name, | |
836 | source_p->username, source_p->host); | |
837 | ||
e3354945 | 838 | target_p->localClient->last_caller_id_time = rb_current_time(); |
212380e3 | 839 | } |
212380e3 AC |
840 | } |
841 | } | |
842 | else | |
b7b1d686 | 843 | sendto_anywhere(target_p, source_p, command, ":%s", text); |
212380e3 | 844 | } |
b7b1d686 | 845 | else |
212380e3 AC |
846 | sendto_anywhere(target_p, source_p, command, ":%s", text); |
847 | ||
848 | return; | |
849 | } | |
850 | ||
c2874388 JT |
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 | ||
212380e3 AC |
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 | ||
c24efdc0 JT |
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)) | |
212380e3 | 886 | { |
c24efdc0 | 887 | if((target_p->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 888 | { |
c24efdc0 JT |
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) | |
212380e3 | 893 | { |
c24efdc0 JT |
894 | target_p->received_number_of_privmsgs = 0; |
895 | target_p->flood_noticed = 0; | |
212380e3 AC |
896 | } |
897 | } | |
898 | ||
c24efdc0 JT |
899 | if((target_p->received_number_of_privmsgs >= |
900 | GlobalSetOptions.floodcount) || target_p->flood_noticed) | |
212380e3 | 901 | { |
c24efdc0 | 902 | if(target_p->flood_noticed == 0) |
212380e3 | 903 | { |
f2c1b06b | 904 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
212380e3 AC |
905 | "Possible Flooder %s[%s@%s] on %s target: %s", |
906 | source_p->name, source_p->username, | |
63aecfb9 | 907 | source_p->orighost, |
c88cdb00 | 908 | source_p->servptr->name, target_p->name); |
c24efdc0 | 909 | target_p->flood_noticed = 1; |
212380e3 | 910 | /* add a bit of penalty */ |
c24efdc0 | 911 | target_p->received_number_of_privmsgs += 2; |
212380e3 AC |
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 | |
c24efdc0 | 920 | target_p->received_number_of_privmsgs++; |
212380e3 AC |
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 | { | |
e3354945 | 942 | if((chptr->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 943 | { |
e3354945 | 944 | delta = rb_current_time() - chptr->first_received_message_time; |
212380e3 | 945 | chptr->received_number_of_privmsgs -= delta; |
e3354945 | 946 | chptr->first_received_message_time = rb_current_time(); |
212380e3 AC |
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 | { | |
f2c1b06b | 959 | sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE, |
212380e3 AC |
960 | "Possible Flooder %s[%s@%s] on %s target: %s", |
961 | source_p->name, source_p->username, | |
63aecfb9 | 962 | source_p->orighost, |
c88cdb00 | 963 | source_p->servptr->name, chptr->chname); |
212380e3 AC |
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; | |
212380e3 AC |
1004 | char *server; |
1005 | char *s; | |
212380e3 AC |
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 | ||
212380e3 AC |
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 | ||
212380e3 | 1038 | /* Check if someones msg'ing opers@our.server */ |
ef57f7fb | 1039 | if(strncmp(nick, "opers@", 6) == 0) |
212380e3 AC |
1040 | { |
1041 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s", | |
1042 | source_p->name, text); | |
1043 | return; | |
1044 | } | |
1045 | ||
ef57f7fb JT |
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 | |
212380e3 | 1051 | */ |
ef57f7fb JT |
1052 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, |
1053 | form_str(ERR_NOSUCHNICK), nick); | |
1054 | return; | |
212380e3 AC |
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 | ||
a6f4368b JT |
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 | ||
212380e3 AC |
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); | |
aa9c9ed2 JT |
1102 | if (p_or_n != NOTICE && *text == '\001') |
1103 | source_p->large_ctcp_sent = rb_current_time(); | |
212380e3 AC |
1104 | return; |
1105 | } | |
1106 | } |