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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" | |
38 | #include "irc_string.h" | |
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" |
212380e3 AC |
46 | |
47 | static int m_message(int, const char *, struct Client *, struct Client *, int, const char **); | |
48 | static int m_privmsg(struct Client *, struct Client *, int, const char **); | |
49 | static int m_notice(struct Client *, struct Client *, int, const char **); | |
50 | ||
51 | static void expire_tgchange(void *unused); | |
0e7cb7e6 | 52 | static struct ev_entry *expire_tgchange_event; |
212380e3 AC |
53 | |
54 | static int | |
55 | modinit(void) | |
56 | { | |
0e7cb7e6 | 57 | expire_tgchange_event = rb_event_addish("expire_tgchange", expire_tgchange, NULL, 300); |
212380e3 AC |
58 | expire_tgchange(NULL); |
59 | return 0; | |
60 | } | |
61 | ||
62 | static void | |
63 | moddeinit(void) | |
64 | { | |
0e7cb7e6 | 65 | rb_event_delete(expire_tgchange_event); |
212380e3 AC |
66 | } |
67 | ||
68 | struct Message privmsg_msgtab = { | |
69 | "PRIVMSG", 0, 0, 0, MFLG_SLOW | MFLG_UNREG, | |
70 | {mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}} | |
71 | }; | |
72 | struct Message notice_msgtab = { | |
73 | "NOTICE", 0, 0, 0, MFLG_SLOW, | |
74 | {mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}} | |
75 | }; | |
76 | ||
77 | mapi_clist_av1 message_clist[] = { &privmsg_msgtab, ¬ice_msgtab, NULL }; | |
78 | ||
63aecfb9 | 79 | DECLARE_MODULE_AV1(message, modinit, moddeinit, message_clist, NULL, NULL, "$Revision: 3173 $"); |
212380e3 AC |
80 | |
81 | struct entity | |
82 | { | |
83 | void *ptr; | |
84 | int type; | |
85 | int flags; | |
86 | }; | |
87 | ||
88 | static int build_target_list(int p_or_n, const char *command, | |
89 | struct Client *client_p, | |
90 | struct Client *source_p, const char *nicks_channels, const char *text); | |
91 | ||
92 | static int flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p); | |
93 | static int flood_attack_channel(int p_or_n, struct Client *source_p, | |
94 | struct Channel *chptr, char *chname); | |
95 | static struct Client *find_userhost(const char *, const char *, int *); | |
96 | ||
97 | #define ENTITY_NONE 0 | |
98 | #define ENTITY_CHANNEL 1 | |
99 | #define ENTITY_CHANOPS_ON_CHANNEL 2 | |
100 | #define ENTITY_CLIENT 3 | |
101 | ||
102 | static struct entity targets[512]; | |
103 | static int ntargets = 0; | |
104 | ||
105 | static int duplicate_ptr(void *); | |
106 | ||
107 | static void msg_channel(int p_or_n, const char *command, | |
108 | struct Client *client_p, | |
109 | struct Client *source_p, struct Channel *chptr, const char *text); | |
110 | ||
111 | static void msg_channel_flags(int p_or_n, const char *command, | |
112 | struct Client *client_p, | |
113 | struct Client *source_p, | |
114 | struct Channel *chptr, int flags, const char *text); | |
115 | ||
116 | static void msg_client(int p_or_n, const char *command, | |
117 | struct Client *source_p, struct Client *target_p, const char *text); | |
118 | ||
119 | static void handle_special(int p_or_n, const char *command, | |
120 | struct Client *client_p, struct Client *source_p, const char *nick, | |
121 | const char *text); | |
122 | ||
123 | /* | |
124 | ** m_privmsg | |
125 | ** | |
126 | ** massive cleanup | |
127 | ** rev argv 6/91 | |
128 | ** | |
129 | ** Another massive cleanup Nov, 2000 | |
130 | ** (I don't think there is a single line left from 6/91. Maybe.) | |
131 | ** m_privmsg and m_notice do basically the same thing. | |
132 | ** in the original 2.8.2 code base, they were the same function | |
133 | ** "m_message.c." When we did the great cleanup in conjuncton with bleep | |
134 | ** of ircu fame, we split m_privmsg.c and m_notice.c. | |
135 | ** I don't see the point of that now. Its harder to maintain, its | |
136 | ** easier to introduce bugs into one version and not the other etc. | |
137 | ** Really, the penalty of an extra function call isn't that big a deal folks. | |
138 | ** -db Nov 13, 2000 | |
139 | ** | |
140 | */ | |
141 | ||
142 | #define PRIVMSG 0 | |
143 | #define NOTICE 1 | |
144 | ||
145 | static int | |
146 | m_privmsg(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
147 | { | |
148 | return m_message(PRIVMSG, "PRIVMSG", client_p, source_p, parc, parv); | |
149 | } | |
150 | ||
151 | static int | |
152 | m_notice(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
153 | { | |
154 | return m_message(NOTICE, "NOTICE", client_p, source_p, parc, parv); | |
155 | } | |
156 | ||
157 | /* | |
158 | * inputs - flag privmsg or notice | |
159 | * - pointer to command "PRIVMSG" or "NOTICE" | |
160 | * - pointer to client_p | |
161 | * - pointer to source_p | |
162 | * - pointer to channel | |
163 | */ | |
164 | static int | |
165 | m_message(int p_or_n, | |
166 | const char *command, | |
167 | struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
168 | { | |
169 | int i; | |
170 | ||
171 | if(parc < 2 || EmptyString(parv[1])) | |
172 | { | |
173 | if(p_or_n != NOTICE) | |
174 | sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name, | |
175 | source_p->name, command); | |
176 | return 0; | |
177 | } | |
178 | ||
179 | if(parc < 3 || EmptyString(parv[2])) | |
180 | { | |
181 | if(p_or_n != NOTICE) | |
182 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | /* Finish the flood grace period if theyre not messaging themselves | |
187 | * as some clients (ircN) do this as a "lag check" | |
188 | */ | |
189 | if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1])) | |
190 | flood_endgrace(source_p); | |
191 | ||
192 | if(build_target_list(p_or_n, command, client_p, source_p, parv[1], parv[2]) < 0) | |
193 | { | |
194 | return 0; | |
195 | } | |
196 | ||
197 | for(i = 0; i < ntargets; i++) | |
198 | { | |
199 | switch (targets[i].type) | |
200 | { | |
201 | case ENTITY_CHANNEL: | |
202 | msg_channel(p_or_n, command, client_p, source_p, | |
203 | (struct Channel *) targets[i].ptr, parv[2]); | |
204 | break; | |
205 | ||
206 | case ENTITY_CHANOPS_ON_CHANNEL: | |
207 | msg_channel_flags(p_or_n, command, client_p, source_p, | |
208 | (struct Channel *) targets[i].ptr, | |
209 | targets[i].flags, parv[2]); | |
210 | break; | |
211 | ||
212 | case ENTITY_CLIENT: | |
213 | msg_client(p_or_n, command, source_p, | |
214 | (struct Client *) targets[i].ptr, parv[2]); | |
215 | break; | |
216 | } | |
217 | } | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | /* | |
223 | * build_target_list | |
224 | * | |
225 | * inputs - pointer to given client_p (server) | |
226 | * - pointer to given source (oper/client etc.) | |
227 | * - pointer to list of nicks/channels | |
228 | * - pointer to table to place results | |
229 | * - pointer to text (only used if source_p is an oper) | |
230 | * output - number of valid entities | |
231 | * side effects - target_table is modified to contain a list of | |
232 | * pointers to channels or clients | |
233 | * if source client is an oper | |
234 | * all the classic old bizzare oper privmsg tricks | |
235 | * are parsed and sent as is, if prefixed with $ | |
236 | * to disambiguate. | |
237 | * | |
238 | */ | |
239 | ||
240 | static int | |
241 | build_target_list(int p_or_n, const char *command, struct Client *client_p, | |
242 | struct Client *source_p, const char *nicks_channels, const char *text) | |
243 | { | |
244 | int type; | |
245 | char *p, *nick, *target_list; | |
246 | struct Channel *chptr = NULL; | |
247 | struct Client *target_p; | |
248 | ||
249 | target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */ | |
250 | ||
251 | ntargets = 0; | |
252 | ||
253 | for(nick = strtoken(&p, target_list, ","); nick; nick = strtoken(&p, NULL, ",")) | |
254 | { | |
255 | char *with_prefix; | |
256 | /* | |
257 | * channels are privmsg'd a lot more than other clients, moved up | |
258 | * here plain old channel msg? | |
259 | */ | |
260 | ||
261 | if(IsChanPrefix(*nick)) | |
262 | { | |
263 | /* ignore send of local channel to a server (should not happen) */ | |
264 | if(IsServer(client_p) && *nick == '&') | |
265 | continue; | |
266 | ||
267 | if((chptr = find_channel(nick)) != NULL) | |
268 | { | |
269 | if(!duplicate_ptr(chptr)) | |
270 | { | |
271 | if(ntargets >= ConfigFileEntry.max_targets) | |
272 | { | |
273 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
274 | me.name, source_p->name, nick); | |
275 | return (1); | |
276 | } | |
277 | targets[ntargets].ptr = (void *) chptr; | |
278 | targets[ntargets++].type = ENTITY_CHANNEL; | |
279 | } | |
280 | } | |
281 | ||
282 | /* non existant channel */ | |
283 | else if(p_or_n != NOTICE) | |
284 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
285 | form_str(ERR_NOSUCHNICK), nick); | |
286 | ||
287 | continue; | |
288 | } | |
289 | ||
290 | if(MyClient(source_p)) | |
291 | target_p = find_named_person(nick); | |
292 | else | |
293 | target_p = find_person(nick); | |
294 | ||
295 | /* look for a privmsg to another client */ | |
296 | if(target_p) | |
297 | { | |
298 | if(!duplicate_ptr(target_p)) | |
299 | { | |
300 | if(ntargets >= ConfigFileEntry.max_targets) | |
301 | { | |
302 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
303 | me.name, source_p->name, nick); | |
304 | return (1); | |
305 | } | |
306 | targets[ntargets].ptr = (void *) target_p; | |
307 | targets[ntargets].type = ENTITY_CLIENT; | |
308 | targets[ntargets++].flags = 0; | |
309 | } | |
310 | continue; | |
311 | } | |
312 | ||
313 | /* @#channel or +#channel message ? */ | |
314 | ||
315 | type = 0; | |
316 | with_prefix = nick; | |
317 | /* allow %+@ if someone wants to do that */ | |
318 | for(;;) | |
319 | { | |
320 | if(*nick == '@') | |
321 | type |= CHFL_CHANOP; | |
322 | else if(*nick == '+') | |
323 | type |= CHFL_CHANOP | CHFL_VOICE; | |
324 | else | |
325 | break; | |
326 | nick++; | |
327 | } | |
328 | ||
329 | if(type != 0) | |
330 | { | |
331 | /* no recipient.. */ | |
332 | if(EmptyString(nick)) | |
333 | { | |
334 | sendto_one(source_p, form_str(ERR_NORECIPIENT), | |
335 | me.name, source_p->name, command); | |
336 | continue; | |
337 | } | |
338 | ||
339 | /* At this point, nick+1 should be a channel name i.e. #foo or &foo | |
340 | * if the channel is found, fine, if not report an error | |
341 | */ | |
342 | ||
343 | if((chptr = find_channel(nick)) != NULL) | |
344 | { | |
345 | struct membership *msptr; | |
346 | ||
347 | msptr = find_channel_membership(chptr, source_p); | |
348 | ||
349 | if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr)) | |
350 | { | |
351 | sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED), | |
352 | me.name, source_p->name, with_prefix); | |
353 | return (-1); | |
354 | } | |
355 | ||
356 | if(!duplicate_ptr(chptr)) | |
357 | { | |
358 | if(ntargets >= ConfigFileEntry.max_targets) | |
359 | { | |
360 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
361 | me.name, source_p->name, nick); | |
362 | return (1); | |
363 | } | |
364 | targets[ntargets].ptr = (void *) chptr; | |
365 | targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL; | |
366 | targets[ntargets++].flags = type; | |
367 | } | |
368 | } | |
369 | else if(p_or_n != NOTICE) | |
370 | { | |
371 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
372 | form_str(ERR_NOSUCHNICK), nick); | |
373 | } | |
374 | ||
375 | continue; | |
376 | } | |
377 | ||
378 | if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$'))) | |
379 | { | |
380 | handle_special(p_or_n, command, client_p, source_p, nick, text); | |
381 | continue; | |
382 | } | |
383 | ||
384 | /* no matching anything found - error if not NOTICE */ | |
385 | if(p_or_n != NOTICE) | |
386 | { | |
387 | /* dont give this numeric when source is local, | |
388 | * because its misleading --anfl | |
389 | */ | |
390 | if(!MyClient(source_p) && IsDigit(*nick)) | |
391 | sendto_one(source_p, ":%s %d %s * :Target left IRC. " | |
392 | "Failed to deliver: [%.20s]", | |
393 | get_id(&me, source_p), ERR_NOSUCHNICK, | |
394 | get_id(source_p, source_p), text); | |
395 | else | |
396 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
397 | form_str(ERR_NOSUCHNICK), nick); | |
398 | } | |
399 | ||
400 | } | |
401 | return (1); | |
402 | } | |
403 | ||
404 | /* | |
405 | * duplicate_ptr | |
406 | * | |
407 | * inputs - pointer to check | |
408 | * - pointer to table of entities | |
409 | * - number of valid entities so far | |
410 | * output - YES if duplicate pointer in table, NO if not. | |
411 | * note, this does the canonize using pointers | |
412 | * side effects - NONE | |
413 | */ | |
414 | static int | |
415 | duplicate_ptr(void *ptr) | |
416 | { | |
417 | int i; | |
418 | for(i = 0; i < ntargets; i++) | |
419 | if(targets[i].ptr == ptr) | |
420 | return YES; | |
421 | return NO; | |
422 | } | |
423 | ||
424 | /* | |
425 | * msg_channel | |
426 | * | |
427 | * inputs - flag privmsg or notice | |
428 | * - pointer to command "PRIVMSG" or "NOTICE" | |
429 | * - pointer to client_p | |
430 | * - pointer to source_p | |
431 | * - pointer to channel | |
432 | * output - NONE | |
433 | * side effects - message given channel | |
434 | * | |
435 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
436 | */ | |
437 | static void | |
438 | msg_channel(int p_or_n, const char *command, | |
439 | struct Client *client_p, struct Client *source_p, struct Channel *chptr, | |
440 | const char *text) | |
441 | { | |
442 | int result; | |
443 | char text2[BUFSIZE]; | |
444 | ||
445 | if(MyClient(source_p)) | |
446 | { | |
447 | /* idle time shouldnt be reset by notices --fl */ | |
448 | if(p_or_n != NOTICE) | |
e3354945 | 449 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
450 | } |
451 | ||
452 | if(chptr->mode.mode & MODE_NOCOLOR) | |
453 | { | |
454 | strlcpy(text2, text, BUFSIZE); | |
455 | strip_colour(text2); | |
456 | text = text2; | |
457 | if (EmptyString(text)) | |
458 | { | |
459 | /* could be empty after colour stripping and | |
460 | * that would cause problems later */ | |
461 | if(p_or_n != NOTICE) | |
462 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
463 | return; | |
464 | } | |
465 | } | |
466 | ||
467 | /* chanops and voiced can flood their own channel with impunity */ | |
468 | if((result = can_send(chptr, source_p, NULL))) | |
469 | { | |
470 | if(result == CAN_SEND_OPV || | |
471 | !flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
472 | { | |
473 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, | |
474 | "%s %s :%s", command, chptr->chname, text); | |
475 | } | |
476 | } | |
477 | else if(chptr->mode.mode & MODE_OPMODERATE && | |
478 | chptr->mode.mode & MODE_MODERATED && | |
479 | IsMember(source_p, chptr)) | |
480 | { | |
481 | /* only do +z for +m channels for now, as bans/quiets | |
482 | * aren't tested for remote clients -- jilles */ | |
483 | if(!flood_attack_channel(p_or_n, source_p, chptr, chptr->chname)) | |
484 | { | |
485 | sendto_channel_flags(client_p, ONLY_CHANOPS, source_p, chptr, | |
486 | "%s %s :%s", command, chptr->chname, text); | |
487 | } | |
488 | } | |
489 | else | |
490 | { | |
491 | if(p_or_n != NOTICE) | |
492 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
493 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
494 | } | |
495 | } | |
496 | ||
497 | /* | |
498 | * msg_channel_flags | |
499 | * | |
500 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
501 | * say NOTICE must not auto reply | |
502 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
503 | * - pointer to client_p | |
504 | * - pointer to source_p | |
505 | * - pointer to channel | |
506 | * - flags | |
507 | * - pointer to text to send | |
508 | * output - NONE | |
509 | * side effects - message given channel either chanop or voice | |
510 | */ | |
511 | static void | |
512 | msg_channel_flags(int p_or_n, const char *command, struct Client *client_p, | |
513 | struct Client *source_p, struct Channel *chptr, int flags, const char *text) | |
514 | { | |
515 | int type; | |
516 | char c; | |
517 | ||
518 | if(flags & CHFL_VOICE) | |
519 | { | |
520 | type = ONLY_CHANOPSVOICED; | |
521 | c = '+'; | |
522 | } | |
523 | else | |
524 | { | |
525 | type = ONLY_CHANOPS; | |
526 | c = '@'; | |
527 | } | |
528 | ||
529 | if(MyClient(source_p)) | |
530 | { | |
531 | /* idletime shouldnt be reset by notice --fl */ | |
532 | if(p_or_n != NOTICE) | |
e3354945 | 533 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
534 | } |
535 | ||
536 | sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s", | |
537 | command, c, chptr->chname, text); | |
538 | } | |
539 | ||
540 | #define PREV_FREE_TARGET(x) ((FREE_TARGET(x) == 0) ? 9 : FREE_TARGET(x) - 1) | |
541 | #define PREV_TARGET(i) ((i == 0) ? i = 9 : --i) | |
542 | #define NEXT_TARGET(i) ((i == 9) ? i = 0 : ++i) | |
543 | ||
544 | static void | |
545 | expire_tgchange(void *unused) | |
546 | { | |
547 | tgchange *target; | |
637c4932 | 548 | rb_dlink_node *ptr, *next_ptr; |
212380e3 | 549 | |
637c4932 | 550 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head) |
212380e3 AC |
551 | { |
552 | target = ptr->data; | |
553 | ||
e3354945 | 554 | if(target->expiry < rb_current_time()) |
212380e3 | 555 | { |
ba200635 AC |
556 | rb_dlinkDelete(ptr, &tgchange_list); |
557 | rb_patricia_remove(tgchange_tree, target->pnode); | |
bd198292 VY |
558 | rb_free(target->ip); |
559 | rb_free(target); | |
212380e3 AC |
560 | } |
561 | } | |
562 | } | |
563 | ||
ae78a571 VY |
564 | static int |
565 | add_target(struct Client *source_p, struct Client *target_p) | |
566 | { | |
567 | int i, j; | |
568 | uint32_t hashv; | |
569 | ||
570 | /* can msg themselves or services without using any target slots */ | |
571 | if(source_p == target_p || IsService(target_p)) | |
572 | return 1; | |
573 | ||
574 | /* special condition for those who have had PRIVMSG crippled to allow them | |
575 | * to talk to IRCops still. | |
576 | * | |
577 | * XXX: is this controversial? | |
578 | */ | |
579 | if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p)) | |
580 | return 1; | |
581 | ||
582 | hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32); | |
583 | ||
584 | if(USED_TARGETS(source_p)) | |
585 | { | |
586 | /* hunt for an existing target */ | |
587 | for(i = PREV_FREE_TARGET(source_p), j = USED_TARGETS(source_p); | |
588 | j; --j, PREV_TARGET(i)) | |
589 | { | |
590 | if(source_p->localClient->targets[i] == hashv) | |
591 | return 1; | |
592 | } | |
593 | ||
594 | /* first message after connect, we may only start clearing | |
595 | * slots after this message --anfl | |
596 | */ | |
597 | if(!IsTGChange(source_p)) | |
598 | { | |
599 | SetTGChange(source_p); | |
600 | source_p->localClient->target_last = rb_current_time(); | |
601 | } | |
602 | /* clear as many targets as we can */ | |
603 | else if((i = (rb_current_time() - source_p->localClient->target_last) / 60)) | |
604 | { | |
605 | if(i > USED_TARGETS(source_p)) | |
606 | USED_TARGETS(source_p) = 0; | |
607 | else | |
608 | USED_TARGETS(source_p) -= i; | |
609 | ||
610 | source_p->localClient->target_last = rb_current_time(); | |
611 | } | |
612 | /* cant clear any, full target list */ | |
613 | else if(USED_TARGETS(source_p) == 10) | |
614 | { | |
615 | ServerStats->is_tgch++; | |
616 | add_tgchange(source_p->sockhost); | |
617 | return 0; | |
618 | } | |
619 | } | |
620 | /* no targets in use, reset their target_last so that they cant | |
621 | * abuse a long idle to get targets back more quickly | |
622 | */ | |
623 | else | |
624 | { | |
625 | source_p->localClient->target_last = rb_current_time(); | |
626 | SetTGChange(source_p); | |
627 | } | |
628 | ||
629 | source_p->localClient->targets[FREE_TARGET(source_p)] = hashv; | |
630 | NEXT_TARGET(FREE_TARGET(source_p)); | |
631 | ++USED_TARGETS(source_p); | |
632 | return 1; | |
212380e3 AC |
633 | } |
634 | ||
635 | /* | |
636 | * msg_client | |
637 | * | |
638 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
639 | * say NOTICE must not auto reply | |
640 | * - pointer to command, "PRIVMSG" or "NOTICE" | |
641 | * - pointer to source_p source (struct Client *) | |
642 | * - pointer to target_p target (struct Client *) | |
643 | * - pointer to text | |
644 | * output - NONE | |
645 | * side effects - message given channel either chanop or voice | |
646 | */ | |
647 | static void | |
648 | msg_client(int p_or_n, const char *command, | |
649 | struct Client *source_p, struct Client *target_p, const char *text) | |
650 | { | |
651 | if(MyClient(source_p)) | |
652 | { | |
653 | /* reset idle time for message only if its not to self | |
654 | * and its not a notice */ | |
655 | if(p_or_n != NOTICE) | |
e3354945 | 656 | source_p->localClient->last = rb_current_time(); |
212380e3 AC |
657 | |
658 | /* target change stuff, dont limit ctcp replies as that | |
659 | * would allow people to start filling up random users | |
660 | * targets just by ctcping them | |
661 | */ | |
662 | if((p_or_n != NOTICE || *text != '\001') && | |
663 | ConfigFileEntry.target_change && !IsOper(source_p)) | |
664 | { | |
665 | if(!add_target(source_p, target_p)) | |
666 | { | |
667 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
668 | me.name, source_p->name, target_p->name); | |
669 | return; | |
670 | } | |
671 | } | |
672 | } | |
673 | else if(source_p->from == target_p->from) | |
674 | { | |
675 | sendto_realops_snomask(SNO_DEBUG, L_ALL, | |
676 | "Send message to %s[%s] dropped from %s(Fake Dir)", | |
677 | target_p->name, target_p->from->name, source_p->name); | |
678 | return; | |
679 | } | |
680 | ||
681 | if(MyConnect(source_p) && (p_or_n != NOTICE) && target_p->user && target_p->user->away) | |
682 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
683 | target_p->name, target_p->user->away); | |
684 | ||
685 | if(MyClient(target_p)) | |
686 | { | |
687 | /* XXX Controversial? allow opers always to send through a +g */ | |
688 | if(!IsServer(source_p) && (IsSetCallerId(target_p) || | |
689 | (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]))) | |
690 | { | |
691 | /* Here is the anti-flood bot/spambot code -db */ | |
692 | if(accept_message(source_p, target_p) || IsOper(source_p)) | |
693 | { | |
694 | sendto_one(target_p, ":%s!%s@%s %s %s :%s", | |
695 | source_p->name, | |
696 | source_p->username, | |
697 | source_p->host, command, target_p->name, text); | |
698 | } | |
699 | else if (IsSetRegOnlyMsg(target_p) && !source_p->user->suser[0]) | |
700 | { | |
701 | if (p_or_n != NOTICE) | |
702 | sendto_one_numeric(source_p, ERR_NONONREG, | |
703 | form_str(ERR_NONONREG), | |
704 | target_p->name); | |
705 | /* Only so opers can watch for floods */ | |
706 | (void) flood_attack_client(p_or_n, source_p, target_p); | |
707 | } | |
708 | else | |
709 | { | |
710 | /* check for accept, flag recipient incoming message */ | |
711 | if(p_or_n != NOTICE) | |
712 | { | |
713 | sendto_one_numeric(source_p, ERR_TARGUMODEG, | |
714 | form_str(ERR_TARGUMODEG), | |
715 | target_p->name); | |
716 | } | |
717 | ||
718 | if((target_p->localClient->last_caller_id_time + | |
e3354945 | 719 | ConfigFileEntry.caller_id_wait) < rb_current_time()) |
212380e3 AC |
720 | { |
721 | if(p_or_n != NOTICE) | |
722 | sendto_one_numeric(source_p, RPL_TARGNOTIFY, | |
723 | form_str(RPL_TARGNOTIFY), | |
724 | target_p->name); | |
725 | ||
726 | sendto_one(target_p, form_str(RPL_UMODEGMSG), | |
727 | me.name, target_p->name, source_p->name, | |
728 | source_p->username, source_p->host); | |
729 | ||
e3354945 | 730 | target_p->localClient->last_caller_id_time = rb_current_time(); |
212380e3 AC |
731 | } |
732 | /* Only so opers can watch for floods */ | |
733 | (void) flood_attack_client(p_or_n, source_p, target_p); | |
734 | } | |
735 | } | |
736 | else | |
737 | { | |
738 | /* If the client is remote, we dont perform a special check for | |
739 | * flooding.. as we wouldnt block their message anyway.. this means | |
740 | * we dont give warnings.. we then check if theyre opered | |
741 | * (to avoid flood warnings), lastly if theyre our client | |
742 | * and flooding -- fl */ | |
743 | if(!MyClient(source_p) || IsOper(source_p) || | |
744 | !flood_attack_client(p_or_n, source_p, target_p)) | |
745 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
746 | } | |
747 | } | |
748 | else if(!MyClient(source_p) || IsOper(source_p) || | |
749 | !flood_attack_client(p_or_n, source_p, target_p)) | |
750 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
751 | ||
752 | return; | |
753 | } | |
754 | ||
755 | /* | |
756 | * flood_attack_client | |
757 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
758 | * say NOTICE must not auto reply | |
759 | * - pointer to source Client | |
760 | * - pointer to target Client | |
761 | * output - 1 if target is under flood attack | |
762 | * side effects - check for flood attack on target target_p | |
763 | */ | |
764 | static int | |
765 | flood_attack_client(int p_or_n, struct Client *source_p, struct Client *target_p) | |
766 | { | |
767 | int delta; | |
768 | ||
769 | if(GlobalSetOptions.floodcount && MyConnect(target_p) && IsClient(source_p)) | |
770 | { | |
e3354945 | 771 | if((target_p->localClient->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 772 | { |
e3354945 | 773 | delta = rb_current_time() - target_p->localClient->first_received_message_time; |
212380e3 | 774 | target_p->localClient->received_number_of_privmsgs -= delta; |
e3354945 | 775 | target_p->localClient->first_received_message_time = rb_current_time(); |
212380e3 AC |
776 | if(target_p->localClient->received_number_of_privmsgs <= 0) |
777 | { | |
778 | target_p->localClient->received_number_of_privmsgs = 0; | |
779 | target_p->localClient->flood_noticed = 0; | |
780 | } | |
781 | } | |
782 | ||
783 | if((target_p->localClient->received_number_of_privmsgs >= | |
784 | GlobalSetOptions.floodcount) || target_p->localClient->flood_noticed) | |
785 | { | |
786 | if(target_p->localClient->flood_noticed == 0) | |
787 | { | |
f2c1b06b | 788 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, |
212380e3 AC |
789 | "Possible Flooder %s[%s@%s] on %s target: %s", |
790 | source_p->name, source_p->username, | |
63aecfb9 | 791 | source_p->orighost, |
c88cdb00 | 792 | source_p->servptr->name, target_p->name); |
212380e3 AC |
793 | target_p->localClient->flood_noticed = 1; |
794 | /* add a bit of penalty */ | |
795 | target_p->localClient->received_number_of_privmsgs += 2; | |
796 | } | |
797 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
798 | sendto_one(source_p, | |
799 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
800 | me.name, source_p->name, target_p->name); | |
801 | return 1; | |
802 | } | |
803 | else | |
804 | target_p->localClient->received_number_of_privmsgs++; | |
805 | } | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
810 | /* | |
811 | * flood_attack_channel | |
812 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
813 | * says NOTICE must not auto reply | |
814 | * - pointer to source Client | |
815 | * - pointer to target channel | |
816 | * output - 1 if target is under flood attack | |
817 | * side effects - check for flood attack on target chptr | |
818 | */ | |
819 | static int | |
820 | flood_attack_channel(int p_or_n, struct Client *source_p, struct Channel *chptr, char *chname) | |
821 | { | |
822 | int delta; | |
823 | ||
824 | if(GlobalSetOptions.floodcount && MyClient(source_p)) | |
825 | { | |
e3354945 | 826 | if((chptr->first_received_message_time + 1) < rb_current_time()) |
212380e3 | 827 | { |
e3354945 | 828 | delta = rb_current_time() - chptr->first_received_message_time; |
212380e3 | 829 | chptr->received_number_of_privmsgs -= delta; |
e3354945 | 830 | chptr->first_received_message_time = rb_current_time(); |
212380e3 AC |
831 | if(chptr->received_number_of_privmsgs <= 0) |
832 | { | |
833 | chptr->received_number_of_privmsgs = 0; | |
834 | chptr->flood_noticed = 0; | |
835 | } | |
836 | } | |
837 | ||
838 | if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount) | |
839 | || chptr->flood_noticed) | |
840 | { | |
841 | if(chptr->flood_noticed == 0) | |
842 | { | |
f2c1b06b | 843 | sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE, |
212380e3 AC |
844 | "Possible Flooder %s[%s@%s] on %s target: %s", |
845 | source_p->name, source_p->username, | |
63aecfb9 | 846 | source_p->orighost, |
c88cdb00 | 847 | source_p->servptr->name, chptr->chname); |
212380e3 AC |
848 | chptr->flood_noticed = 1; |
849 | ||
850 | /* Add a bit of penalty */ | |
851 | chptr->received_number_of_privmsgs += 2; | |
852 | } | |
853 | if(MyClient(source_p) && (p_or_n != NOTICE)) | |
854 | sendto_one(source_p, | |
855 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
856 | me.name, source_p->name, chptr->chname); | |
857 | return 1; | |
858 | } | |
859 | else | |
860 | chptr->received_number_of_privmsgs++; | |
861 | } | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | ||
867 | /* | |
868 | * handle_special | |
869 | * | |
870 | * inputs - server pointer | |
871 | * - client pointer | |
872 | * - nick stuff to grok for opers | |
873 | * - text to send if grok | |
874 | * output - none | |
875 | * side effects - all the traditional oper type messages are parsed here. | |
876 | * i.e. "/msg #some.host." | |
877 | * However, syntax has been changed. | |
878 | * previous syntax "/msg #some.host.mask" | |
879 | * now becomes "/msg $#some.host.mask" | |
880 | * previous syntax of: "/msg $some.server.mask" remains | |
881 | * This disambiguates the syntax. | |
882 | */ | |
883 | static void | |
884 | handle_special(int p_or_n, const char *command, struct Client *client_p, | |
885 | struct Client *source_p, const char *nick, const char *text) | |
886 | { | |
887 | struct Client *target_p; | |
888 | char *host; | |
889 | char *server; | |
890 | char *s; | |
891 | int count; | |
892 | ||
893 | /* user[%host]@server addressed? | |
894 | * NOTE: users can send to user@server, but not user%host@server | |
895 | * or opers@server | |
896 | */ | |
897 | if((server = strchr(nick, '@')) != NULL) | |
898 | { | |
899 | if((target_p = find_server(source_p, server + 1)) == NULL) | |
900 | { | |
901 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
902 | form_str(ERR_NOSUCHSERVER), server + 1); | |
903 | return; | |
904 | } | |
905 | ||
906 | count = 0; | |
907 | ||
908 | if(!IsOper(source_p)) | |
909 | { | |
910 | if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0)) | |
911 | { | |
912 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
913 | form_str(ERR_NOSUCHNICK), nick); | |
914 | return; | |
915 | } | |
916 | } | |
917 | ||
918 | /* somewhere else.. */ | |
919 | if(!IsMe(target_p)) | |
920 | { | |
921 | sendto_one(target_p, ":%s %s %s :%s", | |
922 | get_id(source_p, target_p), command, nick, text); | |
923 | return; | |
924 | } | |
925 | ||
926 | *server = '\0'; | |
927 | ||
928 | if((host = strchr(nick, '%')) != NULL) | |
929 | *host++ = '\0'; | |
930 | ||
931 | /* Check if someones msg'ing opers@our.server */ | |
932 | if(strcmp(nick, "opers") == 0) | |
933 | { | |
934 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s", | |
935 | source_p->name, text); | |
936 | return; | |
937 | } | |
938 | ||
939 | /* | |
940 | * Look for users which match the destination host | |
941 | * (no host == wildcard) and if one and one only is | |
942 | * found connected to me, deliver message! | |
943 | */ | |
944 | target_p = find_userhost(nick, host, &count); | |
945 | ||
946 | if(target_p != NULL) | |
947 | { | |
948 | if(server != NULL) | |
949 | *server = '@'; | |
950 | if(host != NULL) | |
951 | *--host = '%'; | |
952 | ||
953 | if(count == 1) | |
954 | sendto_anywhere(target_p, source_p, command, ":%s", text); | |
955 | else | |
956 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
957 | get_id(&me, source_p), get_id(source_p, source_p), nick); | |
958 | } | |
959 | } | |
960 | ||
961 | /* | |
962 | * the following two cases allow masks in NOTICEs | |
963 | * (for OPERs only) | |
964 | * | |
965 | * Armin, 8Jun90 (gruner@informatik.tu-muenchen.de) | |
966 | */ | |
967 | if(IsOper(source_p) && *nick == '$') | |
968 | { | |
969 | if((*(nick + 1) == '$' || *(nick + 1) == '#')) | |
970 | nick++; | |
971 | else if(MyOper(source_p)) | |
972 | { | |
973 | sendto_one(source_p, | |
974 | ":%s NOTICE %s :The command %s %s is no longer supported, please use $%s", | |
975 | me.name, source_p->name, command, nick, nick); | |
976 | return; | |
977 | } | |
978 | ||
a6f4368b JT |
979 | if(MyClient(source_p) && !IsOperMassNotice(source_p)) |
980 | { | |
981 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
982 | me.name, source_p->name, "mass_notice"); | |
983 | return; | |
984 | } | |
985 | ||
212380e3 AC |
986 | if((s = strrchr(nick, '.')) == NULL) |
987 | { | |
988 | sendto_one_numeric(source_p, ERR_NOTOPLEVEL, | |
989 | form_str(ERR_NOTOPLEVEL), nick); | |
990 | return; | |
991 | } | |
992 | while(*++s) | |
993 | if(*s == '.' || *s == '*' || *s == '?') | |
994 | break; | |
995 | if(*s == '*' || *s == '?') | |
996 | { | |
997 | sendto_one_numeric(source_p, ERR_WILDTOPLEVEL, | |
998 | form_str(ERR_WILDTOPLEVEL), nick); | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p, | |
1003 | nick + 1, | |
1004 | (*nick == '#') ? MATCH_HOST : MATCH_SERVER, | |
1005 | "%s $%s :%s", command, nick, text); | |
1006 | return; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * find_userhost - find a user@host (server or user). | |
1012 | * inputs - user name to look for | |
1013 | * - host name to look for | |
1014 | * - pointer to count of number of matches found | |
1015 | * outputs - pointer to client if found | |
1016 | * - count is updated | |
1017 | * side effects - none | |
1018 | * | |
1019 | */ | |
1020 | static struct Client * | |
1021 | find_userhost(const char *user, const char *host, int *count) | |
1022 | { | |
1023 | struct Client *c2ptr; | |
1024 | struct Client *res = NULL; | |
1025 | char *u = LOCAL_COPY(user); | |
5b96d9a6 | 1026 | rb_dlink_node *ptr; |
212380e3 AC |
1027 | *count = 0; |
1028 | if(collapse(u) != NULL) | |
1029 | { | |
5b96d9a6 | 1030 | RB_DLINK_FOREACH(ptr, global_client_list.head) |
212380e3 AC |
1031 | { |
1032 | c2ptr = ptr->data; | |
1033 | if(!MyClient(c2ptr)) /* implies mine and an user */ | |
1034 | continue; | |
1035 | if((!host || match(host, c2ptr->host)) && irccmp(u, c2ptr->username) == 0) | |
1036 | { | |
1037 | (*count)++; | |
1038 | res = c2ptr; | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | return (res); | |
1043 | } |