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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 AC |
97 | |
98 | #define ENTITY_NONE 0 | |
99 | #define ENTITY_CHANNEL 1 | |
100 | #define ENTITY_CHANOPS_ON_CHANNEL 2 | |
101 | #define ENTITY_CLIENT 3 | |
102 | ||
103 | static struct entity targets[512]; | |
104 | static int ntargets = 0; | |
105 | ||
106 | static int duplicate_ptr(void *); | |
107 | ||
108 | static void msg_channel(int p_or_n, const char *command, | |
109 | struct Client *client_p, | |
110 | struct Client *source_p, struct Channel *chptr, const char *text); | |
111 | ||
112 | static void msg_channel_flags(int p_or_n, const char *command, | |
113 | struct Client *client_p, | |
114 | struct Client *source_p, | |
115 | struct Channel *chptr, int flags, const char *text); | |
116 | ||
117 | static void msg_client(int p_or_n, const char *command, | |
118 | struct Client *source_p, struct Client *target_p, const char *text); | |
119 | ||
120 | static void handle_special(int p_or_n, const char *command, | |
121 | struct Client *client_p, struct Client *source_p, const char *nick, | |
122 | const char *text); | |
123 | ||
124 | /* | |
125 | ** m_privmsg | |
126 | ** | |
127 | ** massive cleanup | |
128 | ** rev argv 6/91 | |
129 | ** | |
130 | ** Another massive cleanup Nov, 2000 | |
131 | ** (I don't think there is a single line left from 6/91. Maybe.) | |
132 | ** m_privmsg and m_notice do basically the same thing. | |
133 | ** in the original 2.8.2 code base, they were the same function | |
134 | ** "m_message.c." When we did the great cleanup in conjuncton with bleep | |
135 | ** of ircu fame, we split m_privmsg.c and m_notice.c. | |
136 | ** I don't see the point of that now. Its harder to maintain, its | |
137 | ** easier to introduce bugs into one version and not the other etc. | |
138 | ** Really, the penalty of an extra function call isn't that big a deal folks. | |
139 | ** -db Nov 13, 2000 | |
140 | ** | |
141 | */ | |
142 | ||
143 | #define PRIVMSG 0 | |
144 | #define NOTICE 1 | |
145 | ||
146 | static int | |
147 | m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
148 | { | |
149 | return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv); | |
150 | } | |
151 | ||
152 | static int | |
153 | m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
154 | { | |
155 | return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv); | |
156 | } | |
157 | ||
158 | /* | |
159 | * inputs - flag privmsg or notice | |
160 | * - pointer to command "PRIVMSG" or "NOTICE" | |
161 | * - pointer to client_p | |
162 | * - pointer to source_p | |
163 | * - pointer to channel | |
164 | */ | |
165 | static int | |
166 | m_message(int p_or_n, | |
167 | const char *command, | |
168 | struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
169 | { | |
170 | int i; | |
171 | ||
172 | if(parc < 2 || EmptyString(parv[1])) | |
173 | { | |
174 | if(p_or_n != NOTICE) | |
175 | sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name, | |
176 | source_p->name, command); | |
177 | return 0; | |
178 | } | |
179 | ||
180 | if(parc < 3 || EmptyString(parv[2])) | |
181 | { | |
182 | if(p_or_n != NOTICE) | |
183 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | /* Finish the flood grace period if theyre not messaging themselves | |
188 | * as some clients (ircN) do this as a "lag check" | |
189 | */ | |
190 | if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1])) | |
191 | flood_endgrace(source_p); | |
192 | ||
193 | if(build_target_list(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0) | |
194 | { | |
195 | return 0; | |
196 | } | |
197 | ||
198 | for(i = 0; i < ntargets; i++) | |
199 | { | |
200 | switch (targets[i].type) | |
201 | { | |
202 | case ENTITY_CHANNEL: | |
203 | msg_channel(p_or_n, command, client_p, source_p, | |
204 | (struct Channel *) targets[i].ptr, parv[2]); | |
205 | break; | |
206 | ||
207 | case ENTITY_CHANOPS_ON_CHANNEL: | |
208 | msg_channel_flags(p_or_n, command, client_p, source_p, | |
209 | (struct Channel *) targets[i].ptr, | |
210 | targets[i].flags, parv[2]); | |
211 | break; | |
212 | ||
213 | case ENTITY_CLIENT: | |
214 | msg_client(p_or_n, command, source_p, | |
215 | (struct Client *) targets[i].ptr, parv[2]); | |
216 | break; | |
217 | } | |
218 | } | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | /* | |
224 | * build_target_list | |
225 | * | |
226 | * inputs - pointer to given client_p (server) | |
227 | * - pointer to given source (oper/client etc.) | |
228 | * - pointer to list of nicks/channels | |
229 | * - pointer to table to place results | |
230 | * - pointer to text (only used if source_p is an oper) | |
231 | * output - number of valid entities | |
232 | * side effects - target_table is modified to contain a list of | |
233 | * pointers to channels or clients | |
234 | * if source client is an oper | |
235 | * all the classic old bizzare oper privmsg tricks | |
236 | * are parsed and sent as is, if prefixed with $ | |
237 | * to disambiguate. | |
238 | * | |
239 | */ | |
240 | ||
241 | static int | |
242 | build_target_list(int p_or_n, const char *command, struct Client *client_p, | |
243 | struct Client *source_p, const char *nicks_channels, const char *text) | |
244 | { | |
245 | int type; | |
246 | char *p, *nick, *target_list; | |
247 | struct Channel *chptr = NULL; | |
248 | struct Client *target_p; | |
249 | ||
250 | target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */ | |
251 | ||
252 | ntargets = 0; | |
253 | ||
4a2651e5 | 254 | for(nick = rb_strtok_r(target_list, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p)) |
212380e3 AC |
255 | { |
256 | char *with_prefix; | |
257 | /* | |
258 | * channels are privmsg'd a lot more than other clients, moved up | |
259 | * here plain old channel msg? | |
260 | */ | |
261 | ||
262 | if(IsChanPrefix(*nick)) | |
263 | { | |
264 | /* ignore send of local channel to a server (should not happen) */ | |
265 | if(IsServer(client_p) && *nick == '&') | |
266 | continue; | |
267 | ||
268 | if((chptr = find_channel(nick)) != NULL) | |
269 | { | |
270 | if(!duplicate_ptr(chptr)) | |
271 | { | |
272 | if(ntargets >= ConfigFileEntry.max_targets) | |
273 | { | |
274 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
275 | me.name, source_p->name, nick); | |
276 | return (1); | |
277 | } | |
278 | targets[ntargets].ptr = (void *) chptr; | |
279 | targets[ntargets++].type = ENTITY_CHANNEL; | |
280 | } | |
281 | } | |
282 | ||
283 | /* non existant channel */ | |
284 | else if(p_or_n != NOTICE) | |
285 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
286 | form_str(ERR_NOSUCHNICK), nick); | |
287 | ||
288 | continue; | |
289 | } | |
290 | ||
291 | if(MyClient(source_p)) | |
292 | target_p = find_named_person(nick); | |
293 | else | |
294 | target_p = find_person(nick); | |
295 | ||
296 | /* look for a privmsg to another client */ | |
297 | if(target_p) | |
298 | { | |
299 | if(!duplicate_ptr(target_p)) | |
300 | { | |
301 | if(ntargets >= ConfigFileEntry.max_targets) | |
302 | { | |
303 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
304 | me.name, source_p->name, nick); | |
305 | return (1); | |
306 | } | |
307 | targets[ntargets].ptr = (void *) target_p; | |
308 | targets[ntargets].type = ENTITY_CLIENT; | |
309 | targets[ntargets++].flags = 0; | |
310 | } | |
311 | continue; | |
312 | } | |
313 | ||
314 | /* @#channel or +#channel message ? */ | |
315 | ||
316 | type = 0; | |
317 | with_prefix = nick; | |
318 | /* allow %+@ if someone wants to do that */ | |
319 | for(;;) | |
320 | { | |
321 | if(*nick == '@') | |
322 | type |= CHFL_CHANOP; | |
323 | else if(*nick == '+') | |
324 | type |= CHFL_CHANOP | CHFL_VOICE; | |
325 | else | |
326 | break; | |
327 | nick++; | |
328 | } | |
329 | ||
330 | if(type != 0) | |
331 | { | |
332 | /* no recipient.. */ | |
333 | if(EmptyString(nick)) | |
334 | { | |
335 | sendto_one(source_p, form_str(ERR_NORECIPIENT), | |
336 | me.name, source_p->name, command); | |
337 | continue; | |
338 | } | |
339 | ||
340 | /* At this point, nick+1 should be a channel name i.e. #foo or &foo | |
341 | * if the channel is found, fine, if not report an error | |
342 | */ | |
343 | ||
344 | if((chptr = find_channel(nick)) != NULL) | |
345 | { | |
346 | struct membership *msptr; | |
347 | ||
348 | msptr = find_channel_membership(chptr, source_p); | |
349 | ||
350 | if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr)) | |
351 | { | |
352 | sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED), | |
353 | me.name, source_p->name, with_prefix); | |
354 | return (-1); | |
355 | } | |
356 | ||
357 | if(!duplicate_ptr(chptr)) | |
358 | { | |
359 | if(ntargets >= ConfigFileEntry.max_targets) | |
360 | { | |
361 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
362 | me.name, source_p->name, nick); | |
363 | return (1); | |
364 | } | |
365 | targets[ntargets].ptr = (void *) chptr; | |
366 | targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL; | |
367 | targets[ntargets++].flags = type; | |
368 | } | |
369 | } | |
370 | else if(p_or_n != NOTICE) | |
371 | { | |
372 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
373 | form_str(ERR_NOSUCHNICK), nick); | |
374 | } | |
375 | ||
376 | continue; | |
377 | } | |
378 | ||
379 | if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$'))) | |
380 | { | |
381 | handle_special(p_or_n, command, client_p, source_p, nick, text); | |
382 | continue; | |
383 | } | |
384 | ||
385 | /* no matching anything found - error if not NOTICE */ | |
386 | if(p_or_n != NOTICE) | |
387 | { | |
388 | /* dont give this numeric when source is local, | |
389 | * because its misleading --anfl | |
390 | */ | |
391 | if(!MyClient(source_p) && IsDigit(*nick)) | |
392 | sendto_one(source_p, ":%s %d %s * :Target left IRC. " | |
393 | "Failed to deliver: [%.20s]", | |
394 | get_id(&me, source_p), ERR_NOSUCHNICK, | |
395 | get_id(source_p, source_p), text); | |
396 | else | |
397 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
398 | form_str(ERR_NOSUCHNICK), nick); | |
399 | } | |
400 | ||
401 | } | |
402 | return (1); | |
403 | } | |
404 | ||
405 | /* | |
406 | * duplicate_ptr | |
407 | * | |
408 | * inputs - pointer to check | |
409 | * - pointer to table of entities | |
410 | * - number of valid entities so far | |
411 | * output - YES if duplicate pointer in table, NO if not. | |
412 | * note, this does the canonize using pointers | |
413 | * side effects - NONE | |
414 | */ | |
415 | static int | |
416 | duplicate_ptr(void *ptr) | |
417 | { | |
418 | int i; | |
419 | for(i = 0; i < ntargets; i++) | |
420 | if(targets[i].ptr == ptr) | |
421 | return YES; | |
422 | return NO; | |
423 | } | |
424 | ||
425 | /* | |
426 | * msg_channel | |
427 | * | |
428 | * inputs - flag privmsg or notice | |
429 | * - pointer to command "PRIVMSG" or "NOTICE" | |
430 | * - pointer to client_p | |
431 | * - pointer to source_p | |
432 | * - pointer to channel | |
433 | * output - NONE | |
434 | * side effects - message given channel | |
435 | * | |
436 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
437 | */ | |
438 | static void | |
439 | msg_channel(int p_or_n, const char *command, | |
440 | struct Client *client_p, struct Client *source_p, struct Channel *chptr, | |
441 | const char *text) | |
442 | { | |
443 | int result; | |
444 | char text2[BUFSIZE]; | |
445 | ||
446 | if(MyClient(source_p)) | |
447 | { | |
448 | /* idle time shouldnt be reset by notices --fl */ | |
449 | if(p_or_n != NOTICE) | |
e3354945 | 450 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
451 | } |
452 | ||
453 | if(chptr->mode.mode & MODE_NOCOLOR) | |
454 | { | |
f427c8b0 | 455 | rb_strlcpy(text2, text, BUFSIZE); |
212380e3 AC |
456 | strip_colour(text2); |
457 | text = text2; | |
458 | if (EmptyString(text)) | |
459 | { | |
460 | /* could be empty after colour stripping and | |
461 | * that would cause problems later */ | |
462 | if(p_or_n != NOTICE) | |
463 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
464 | return; | |
465 | } | |
466 | } | |
467 | ||
468 | /* chanops and voiced can flood their own channel with impunity */ | |
469 | if((result = can_send(chptr, source_p, NULL))) | |
470 | { | |
471 | if(result == CAN_SEND_OPV || | |
472 | !flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
473 | { | |
474 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, | |
475 | "%s %s :%s", command, chptr->chname, text); | |
476 | } | |
477 | } | |
478 | else if(chptr->mode.mode & MODE_OPMODERATE && | |
479 | chptr->mode.mode & MODE_MODERATED && | |
8feca176 JT |
480 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || |
481 | IsMember(source_p, chptr))) | |
212380e3 AC |
482 | { |
483 | /* only do +z for +m channels for now, as bans/quiets | |
484 | * aren't tested for remote clients -- jilles */ | |
485 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
486 | { | |
487 | sendto_channel_flags(client_p, ONLY_CHANOPS, source_p, chptr, | |
488 | "%s %s :%s", command, chptr->chname, text); | |
489 | } | |
490 | } | |
491 | else | |
492 | { | |
493 | if(p_or_n != NOTICE) | |
494 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
495 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
496 | } | |
497 | } | |
498 | ||
499 | /* | |
500 | * msg_channel_flags | |
501 | * | |
502 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
503 | * say NOTICE must not auto reply | |
504 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
505 | * - pointer to client_p | |
506 | * - pointer to source_p | |
507 | * - pointer to channel | |
508 | * - flags | |
509 | * - pointer to text to send | |
510 | * output - NONE | |
511 | * side effects - message given channel either chanop or voice | |
512 | */ | |
513 | static void | |
514 | msg_channel_flags(int p_or_n, const char *command, struct Client *client_p, | |
515 | struct Client *source_p, struct Channel *chptr, int flags, const char *text) | |
516 | { | |
517 | int type; | |
518 | char c; | |
519 | ||
520 | if(flags & CHFL_VOICE) | |
521 | { | |
522 | type = ONLY_CHANOPSVOICED; | |
523 | c = '+'; | |
524 | } | |
525 | else | |
526 | { | |
527 | type = ONLY_CHANOPS; | |
528 | c = '@'; | |
529 | } | |
530 | ||
531 | if(MyClient(source_p)) | |
532 | { | |
533 | /* idletime shouldnt be reset by notice --fl */ | |
534 | if(p_or_n != NOTICE) | |
e3354945 | 535 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
536 | } |
537 | ||
538 | sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s", | |
539 | command, c, chptr->chname, text); | |
540 | } | |
541 | ||
542 | #define PREV_FREE_TARGET(x) ((FREE_TARGET(x) == 0) ? 9 : FREE_TARGET(x) - 1) | |
543 | #define PREV_TARGET(i) ((i == 0) ? i = 9 : --i) | |
544 | #define NEXT_TARGET(i) ((i == 9) ? i = 0 : ++i) | |
545 | ||
546 | static void | |
547 | expire_tgchange(void *unused) | |
548 | { | |
549 | tgchange *target; | |
637c4932 | 550 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 551 | |
637c4932 | 552 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head) |
212380e3 AC |
553 | { |
554 | target = ptr->data; | |
555 | ||
e3354945 | 556 | if(target->expiry < rb_current_time()) |
212380e3 | 557 | { |
ba200635 AC |
558 | rb_dlinkDelete(ptr, &tgchange_list); |
559 | rb_patricia_remove(tgchange_tree, target->pnode); | |
bd198292 VY |
560 | rb_free(target->ip); |
561 | rb_free(target); | |
212380e3 AC |
562 | } |
563 | } | |
564 | } | |
565 | ||
ae78a571 VY |
566 | static int |
567 | add_target(struct Client *source_p, struct Client *target_p) | |
568 | { | |
569 | int i, j; | |
570 | uint32_t hashv; | |
571 | ||
572 | /* can msg themselves or services without using any target slots */ | |
573 | if(source_p == target_p || IsService(target_p)) | |
574 | return 1; | |
575 | ||
576 | /* special condition for those who have had PRIVMSG crippled to allow them | |
577 | * to talk to IRCops still. | |
578 | * | |
579 | * XXX: is this controversial? | |
580 | */ | |
581 | if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p)) | |
582 | return 1; | |
583 | ||
584 | hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32); | |
585 | ||
586 | if(USED_TARGETS(source_p)) | |
587 | { | |
588 | /* hunt for an existing target */ | |
589 | for(i = PREV_FREE_TARGET(source_p), j = USED_TARGETS(source_p); | |
590 | j; --j, PREV_TARGET(i)) | |
591 | { | |
592 | if(source_p->localClient->targets[i] == hashv) | |
593 | return 1; | |
594 | } | |
595 | ||
596 | /* first message after connect, we may only start clearing | |
597 | * slots after this message --anfl | |
598 | */ | |
599 | if(!IsTGChange(source_p)) | |
600 | { | |
601 | SetTGChange(source_p); | |
602 | source_p->localClient->target_last = rb_current_time(); | |
603 | } | |
604 | /* clear as many targets as we can */ | |
605 | else if((i = (rb_current_time() - source_p->localClient->target_last) / 60)) | |
606 | { | |
607 | if(i > USED_TARGETS(source_p)) | |
608 | USED_TARGETS(source_p) = 0; | |
609 | else | |
610 | USED_TARGETS(source_p) -= i; | |
611 | ||
612 | source_p->localClient->target_last = rb_current_time(); | |
613 | } | |
614 | /* cant clear any, full target list */ | |
615 | else if(USED_TARGETS(source_p) == 10) | |
616 | { | |
47adde3d | 617 | ServerStats.is_tgch++; |
ae78a571 VY |
618 | add_tgchange(source_p->sockhost); |
619 | return 0; | |
620 | } | |
621 | } | |
622 | /* no targets in use, reset their target_last so that they cant | |
623 | * abuse a long idle to get targets back more quickly | |
624 | */ | |
625 | else | |
626 | { | |
627 | source_p->localClient->target_last = rb_current_time(); | |
628 | SetTGChange(source_p); | |
629 | } | |
630 | ||
631 | source_p->localClient->targets[FREE_TARGET(source_p)] = hashv; | |
632 | NEXT_TARGET(FREE_TARGET(source_p)); | |
633 | ++USED_TARGETS(source_p); | |
634 | return 1; | |
212380e3 AC |
635 | } |
636 | ||
637 | /* | |
638 | * msg_client | |
639 | * | |
640 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
641 | * say NOTICE must not auto reply | |
642 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
643 | * - pointer to source_p source (struct Client *) | |
644 | * - pointer to target_p target (struct Client *) | |
645 | * - pointer to text | |
646 | * output - NONE | |
647 | * side effects - message given channel either chanop or voice | |
648 | */ | |
649 | static void | |
650 | msg_client(int p_or_n, const char *command, | |
651 | struct Client *source_p, struct Client *target_p, const char *text) | |
652 | { | |
c2874388 JT |
653 | int do_floodcount = 0; |
654 | ||
212380e3 AC |
655 | if(MyClient(source_p)) |
656 | { | |
657 | /* reset idle time for message only if its not to self | |
658 | * and its not a notice */ | |
659 | if(p_or_n != NOTICE) | |
e3354945 | 660 | source_p->localClient->last = rb_current_time(); |
212380e3 | 661 | |
c2874388 JT |
662 | /* auto cprivmsg/cnotice */ |
663 | do_floodcount = !IsOper(source_p) && | |
664 | !find_allowing_channel(source_p, target_p); | |
665 | ||
212380e3 AC |
666 | /* target change stuff, dont limit ctcp replies as that |
667 | * would allow people to start filling up random users | |
668 | * targets just by ctcping them | |
669 | */ | |
670 | if((p_or_n != NOTICE || *text != '\001') && | |
c2874388 | 671 | ConfigFileEntry.target_change && do_floodcount) |
212380e3 AC |
672 | { |
673 | if(!add_target(source_p, target_p)) | |
674 | { | |
675 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
676 | me.name, source_p->name, target_p->name); | |
677 | return; | |
678 | } | |
679 | } | |
680 | } | |
681 | else if(source_p->from == target_p->from) | |
682 | { | |
683 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
684 | "Send message to %s[%s] dropped from %s(Fake Dir)", | |
685 | target_p->name, target_p->from->name, source_p->name); | |
686 | return; | |
687 | } | |
688 | ||
689 | if(MyConnect(source_p) && (p_or_n != NOTICE) && target_p->user && target_p->user->away) | |
690 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
691 | target_p->name, target_p->user->away); | |
692 | ||
693 | if(MyClient(target_p)) | |
694 | { | |
695 | /* XXX Controversial? allow opers always to send through a +g */ | |
696 | if(!IsServer(source_p) && (IsSetCallerId(target_p) || | |
697 | (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]))) | |
698 | { | |
699 | /* Here is the anti-flood bot/spambot code -db */ | |
700 | if(accept_message(source_p, target_p) || IsOper(source_p)) | |
701 | { | |
702 | sendto_one(target_p, ":%s!%s@%s %s %s :%s", | |
703 | source_p->name, | |
704 | source_p->username, | |
705 | source_p->host, command, target_p->name, text); | |
706 | } | |
707 | else if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]) | |
708 | { | |
709 | if (p_or_n != NOTICE) | |
710 | sendto_one_numeric(source_p, ERR_NONONREG, | |
711 | form_str(ERR_NONONREG), | |
712 | target_p->name); | |
713 | /* Only so opers can watch for floods */ | |
c2874388 | 714 | if (do_floodcount) |
c24efdc0 | 715 | (void) flood_attack_client(p_or_n, source_p, target_p); |
212380e3 AC |
716 | } |
717 | else | |
718 | { | |
719 | /* check for accept, flag recipient incoming message */ | |
720 | if(p_or_n != NOTICE) | |
721 | { | |
722 | sendto_one_numeric(source_p, ERR_TARGUMODEG, | |
723 | form_str(ERR_TARGUMODEG), | |
724 | target_p->name); | |
725 | } | |
726 | ||
727 | if((target_p->localClient->last_caller_id_time + | |
e3354945 | 728 | ConfigFileEntry.caller_id_wait) < rb_current_time()) |
212380e3 AC |
729 | { |
730 | if(p_or_n != NOTICE) | |
731 | sendto_one_numeric(source_p, RPL_TARGNOTIFY, | |
732 | form_str(RPL_TARGNOTIFY), | |
733 | target_p->name); | |
734 | ||
735 | sendto_one(target_p, form_str(RPL_UMODEGMSG), | |
736 | me.name, target_p->name, source_p->name, | |
737 | source_p->username, source_p->host); | |
738 | ||
e3354945 | 739 | target_p->localClient->last_caller_id_time = rb_current_time(); |
212380e3 AC |
740 | } |
741 | /* Only so opers can watch for floods */ | |
c2874388 | 742 | if (do_floodcount) |
c24efdc0 | 743 | (void) flood_attack_client(p_or_n, source_p, target_p); |
212380e3 AC |
744 | } |
745 | } | |
746 | else | |
747 | { | |
748 | /* If the client is remote, we dont perform a special check for | |
749 | * flooding.. as we wouldnt block their message anyway.. this means | |
750 | * we dont give warnings.. we then check if theyre opered | |
751 | * (to avoid flood warnings), lastly if theyre our client | |
752 | * and flooding -- fl */ | |
c2874388 | 753 | if(!do_floodcount || |
212380e3 AC |
754 | !flood_attack_client(p_or_n, source_p, target_p)) |
755 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
756 | } | |
757 | } | |
c2874388 | 758 | else if(!do_floodcount || |
212380e3 AC |
759 | !flood_attack_client(p_or_n, source_p, target_p)) |
760 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
761 | ||
762 | return; | |
763 | } | |
764 | ||
c2874388 JT |
765 | static struct Channel * |
766 | find_allowing_channel(struct Client *source_p, struct Client *target_p) | |
767 | { | |
768 | rb_dlink_node *ptr; | |
769 | struct membership *msptr; | |
770 | ||
771 | RB_DLINK_FOREACH(ptr, source_p->user->channel.head) | |
772 | { | |
773 | msptr = ptr->data; | |
774 | if (is_chanop_voiced(msptr) && IsMember(target_p, msptr->chptr)) | |
775 | return msptr->chptr; | |
776 | } | |
777 | return NULL; | |
778 | } | |
779 | ||
212380e3 AC |
780 | /* |
781 | * flood_attack_client | |
782 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
783 | * say NOTICE must not auto reply | |
784 | * - pointer to source Client | |
785 | * - pointer to target Client | |
786 | * output - 1 if target is under flood attack | |
787 | * side effects - check for flood attack on target target_p | |
788 | */ | |
789 | static int | |
790 | flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p) | |
791 | { | |
792 | int delta; | |
793 | ||
c24efdc0 JT |
794 | /* Services could get many messages legitimately and |
795 | * can be messaged without rate limiting via aliases | |
796 | * and msg user@server. | |
797 | * -- jilles | |
798 | */ | |
799 | if(GlobalSetOptions.floodcount && IsClient(source_p) && source_p != target_p && !IsService(target_p)) | |
212380e3 | 800 | { |
c24efdc0 | 801 | if((target_p->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 802 | { |
c24efdc0 JT |
803 | delta = rb_current_time() - target_p->first_received_message_time; |
804 | target_p->received_number_of_privmsgs -= delta; | |
805 | target_p->first_received_message_time = rb_current_time(); | |
806 | if(target_p->received_number_of_privmsgs <= 0) | |
212380e3 | 807 | { |
c24efdc0 JT |
808 | target_p->received_number_of_privmsgs = 0; |
809 | target_p->flood_noticed = 0; | |
212380e3 AC |
810 | } |
811 | } | |
812 | ||
c24efdc0 JT |
813 | if((target_p->received_number_of_privmsgs >= |
814 | GlobalSetOptions.floodcount) || target_p->flood_noticed) | |
212380e3 | 815 | { |
c24efdc0 | 816 | if(target_p->flood_noticed == 0) |
212380e3 | 817 | { |
f2c1b06b | 818 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
212380e3 AC |
819 | "Possible Flooder %s[%s@%s] on %s target: %s", |
820 | source_p->name, source_p->username, | |
63aecfb9 | 821 | source_p->orighost, |
c88cdb00 | 822 | source_p->servptr->name, target_p->name); |
c24efdc0 | 823 | target_p->flood_noticed = 1; |
212380e3 | 824 | /* add a bit of penalty */ |
c24efdc0 | 825 | target_p->received_number_of_privmsgs += 2; |
212380e3 AC |
826 | } |
827 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
828 | sendto_one(source_p, | |
829 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
830 | me.name, source_p->name, target_p->name); | |
831 | return 1; | |
832 | } | |
833 | else | |
c24efdc0 | 834 | target_p->received_number_of_privmsgs++; |
212380e3 AC |
835 | } |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
840 | /* | |
841 | * flood_attack_channel | |
842 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
843 | * says NOTICE must not auto reply | |
844 | * - pointer to source Client | |
845 | * - pointer to target channel | |
846 | * output - 1 if target is under flood attack | |
847 | * side effects - check for flood attack on target chptr | |
848 | */ | |
849 | static int | |
850 | flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname) | |
851 | { | |
852 | int delta; | |
853 | ||
854 | if(GlobalSetOptions.floodcount && MyClient(source_p)) | |
855 | { | |
e3354945 | 856 | if((chptr->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 857 | { |
e3354945 | 858 | delta = rb_current_time() - chptr->first_received_message_time; |
212380e3 | 859 | chptr->received_number_of_privmsgs -= delta; |
e3354945 | 860 | chptr->first_received_message_time = rb_current_time(); |
212380e3 AC |
861 | if(chptr->received_number_of_privmsgs <= 0) |
862 | { | |
863 | chptr->received_number_of_privmsgs = 0; | |
864 | chptr->flood_noticed = 0; | |
865 | } | |
866 | } | |
867 | ||
868 | if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount) | |
869 | || chptr->flood_noticed) | |
870 | { | |
871 | if(chptr->flood_noticed == 0) | |
872 | { | |
f2c1b06b | 873 | sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE, |
212380e3 AC |
874 | "Possible Flooder %s[%s@%s] on %s target: %s", |
875 | source_p->name, source_p->username, | |
63aecfb9 | 876 | source_p->orighost, |
c88cdb00 | 877 | source_p->servptr->name, chptr->chname); |
212380e3 AC |
878 | chptr->flood_noticed = 1; |
879 | ||
880 | /* Add a bit of penalty */ | |
881 | chptr->received_number_of_privmsgs += 2; | |
882 | } | |
883 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
884 | sendto_one(source_p, | |
885 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
886 | me.name, source_p->name, chptr->chname); | |
887 | return 1; | |
888 | } | |
889 | else | |
890 | chptr->received_number_of_privmsgs++; | |
891 | } | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | ||
897 | /* | |
898 | * handle_special | |
899 | * | |
900 | * inputs - server pointer | |
901 | * - client pointer | |
902 | * - nick stuff to grok for opers | |
903 | * - text to send if grok | |
904 | * output - none | |
905 | * side effects - all the traditional oper type messages are parsed here. | |
906 | * i.e. "/msg #some.host." | |
907 | * However, syntax has been changed. | |
908 | * previous syntax "/msg #some.host.mask" | |
909 | * now becomes "/msg $#some.host.mask" | |
910 | * previous syntax of: "/msg $some.server.mask" remains | |
911 | * This disambiguates the syntax. | |
912 | */ | |
913 | static void | |
914 | handle_special(int p_or_n, const char *command, struct Client *client_p, | |
915 | struct Client *source_p, const char *nick, const char *text) | |
916 | { | |
917 | struct Client *target_p; | |
212380e3 AC |
918 | char *server; |
919 | char *s; | |
212380e3 AC |
920 | |
921 | /* user[%host]@server addressed? | |
922 | * NOTE: users can send to user@server, but not user%host@server | |
923 | * or opers@server | |
924 | */ | |
925 | if((server = strchr(nick, '@')) != NULL) | |
926 | { | |
927 | if((target_p = find_server(source_p, server + 1)) == NULL) | |
928 | { | |
929 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
930 | form_str(ERR_NOSUCHSERVER), server + 1); | |
931 | return; | |
932 | } | |
933 | ||
212380e3 AC |
934 | if(!IsOper(source_p)) |
935 | { | |
936 | if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0)) | |
937 | { | |
938 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
939 | form_str(ERR_NOSUCHNICK), nick); | |
940 | return; | |
941 | } | |
942 | } | |
943 | ||
944 | /* somewhere else.. */ | |
945 | if(!IsMe(target_p)) | |
946 | { | |
947 | sendto_one(target_p, ":%s %s %s :%s", | |
948 | get_id(source_p, target_p), command, nick, text); | |
949 | return; | |
950 | } | |
951 | ||
212380e3 | 952 | /* Check if someones msg'ing opers@our.server */ |
ef57f7fb | 953 | if(strncmp(nick, "opers@", 6) == 0) |
212380e3 AC |
954 | { |
955 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s", | |
956 | source_p->name, text); | |
957 | return; | |
958 | } | |
959 | ||
ef57f7fb JT |
960 | /* This was not very useful except for bypassing certain |
961 | * restrictions. Note that we still allow sending to | |
962 | * remote servers this way, for messaging pseudoservers | |
963 | * securely whether they have a service{} block or not. | |
964 | * -- jilles | |
212380e3 | 965 | */ |
ef57f7fb JT |
966 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, |
967 | form_str(ERR_NOSUCHNICK), nick); | |
968 | return; | |
212380e3 AC |
969 | } |
970 | ||
971 | /* | |
972 | * the following two cases allow masks in NOTICEs | |
973 | * (for OPERs only) | |
974 | * | |
975 | * Armin, 8Jun90 (gruner@informatik.tu-muenchen.de) | |
976 | */ | |
977 | if(IsOper(source_p) && *nick == '$') | |
978 | { | |
979 | if((*(nick + 1) == '$' || *(nick + 1) == '#')) | |
980 | nick++; | |
981 | else if(MyOper(source_p)) | |
982 | { | |
983 | sendto_one(source_p, | |
984 | ":%s NOTICE %s :The command %s %s is no longer supported, please use $%s", | |
985 | me.name, source_p->name, command, nick, nick); | |
986 | return; | |
987 | } | |
988 | ||
a6f4368b JT |
989 | if(MyClient(source_p) && !IsOperMassNotice(source_p)) |
990 | { | |
991 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
992 | me.name, source_p->name, "mass_notice"); | |
993 | return; | |
994 | } | |
995 | ||
212380e3 AC |
996 | if((s = strrchr(nick, '.')) == NULL) |
997 | { | |
998 | sendto_one_numeric(source_p, ERR_NOTOPLEVEL, | |
999 | form_str(ERR_NOTOPLEVEL), nick); | |
1000 | return; | |
1001 | } | |
1002 | while(*++s) | |
1003 | if(*s == '.' || *s == '*' || *s == '?') | |
1004 | break; | |
1005 | if(*s == '*' || *s == '?') | |
1006 | { | |
1007 | sendto_one_numeric(source_p, ERR_WILDTOPLEVEL, | |
1008 | form_str(ERR_WILDTOPLEVEL), nick); | |
1009 | return; | |
1010 | } | |
1011 | ||
1012 | sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p, | |
1013 | nick + 1, | |
1014 | (*nick == '#') ? MATCH_HOST : MATCH_SERVER, | |
1015 | "%s $%s :%s", command, nick, text); | |
1016 | return; | |
1017 | } | |
1018 | } |