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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_message.c: Sends a (PRIVMSG|NOTICE) message to a user or channel. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | */ | |
24 | ||
25 | #include "stdinc.h" | |
26 | #include "client.h" | |
27 | #include "ircd.h" | |
28 | #include "numeric.h" | |
29 | #include "s_conf.h" | |
30 | #include "s_serv.h" | |
31 | #include "msg.h" | |
32 | #include "parse.h" | |
33 | #include "modules.h" | |
34 | #include "channel.h" | |
35 | #include "match.h" | |
36 | #include "hash.h" | |
37 | #include "class.h" | |
38 | #include "msg.h" | |
39 | #include "packet.h" | |
40 | #include "send.h" | |
41 | #include "s_newconf.h" | |
42 | #include "s_stats.h" | |
43 | #include "tgchange.h" | |
44 | #include "inline/stringops.h" | |
45 | ||
46 | static const char message_desc[] = | |
47 | "Provides the PRIVMSG and NOTICE commands to send messages to users and channels"; | |
48 | ||
49 | static void m_message(enum message_type, struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
50 | static void m_privmsg(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
51 | static void m_notice(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
52 | static void m_echo(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
53 | ||
54 | static void echo_msg(struct Client *, struct Client *, enum message_type, const char *); | |
55 | ||
56 | static void expire_tgchange(void *unused); | |
57 | static struct ev_entry *expire_tgchange_event; | |
58 | ||
59 | static unsigned int CAP_ECHO; | |
60 | ||
61 | static int | |
62 | modinit(void) | |
63 | { | |
64 | expire_tgchange_event = rb_event_addish("expire_tgchange", expire_tgchange, NULL, 300); | |
65 | expire_tgchange(NULL); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static void | |
70 | moddeinit(void) | |
71 | { | |
72 | rb_event_delete(expire_tgchange_event); | |
73 | } | |
74 | ||
75 | struct Message privmsg_msgtab = { | |
76 | "PRIVMSG", 0, 0, 0, 0, | |
77 | {mg_unreg, {m_privmsg, 0}, {m_privmsg, 0}, mg_ignore, mg_ignore, {m_privmsg, 0}} | |
78 | }; | |
79 | struct Message notice_msgtab = { | |
80 | "NOTICE", 0, 0, 0, 0, | |
81 | {mg_unreg, {m_notice, 0}, {m_notice, 0}, {m_notice, 0}, mg_ignore, {m_notice, 0}} | |
82 | }; | |
83 | struct Message echo_msgtab = { | |
84 | "ECHO", 0, 0, 0, 0, | |
85 | {mg_unreg, mg_ignore, {m_echo, 3}, mg_ignore, mg_ignore, mg_ignore} | |
86 | }; | |
87 | ||
88 | mapi_clist_av1 message_clist[] = { &privmsg_msgtab, ¬ice_msgtab, &echo_msgtab, NULL }; | |
89 | ||
90 | mapi_cap_list_av2 message_cap_list[] = { | |
91 | { MAPI_CAP_SERVER, "ECHO", NULL, &CAP_ECHO }, | |
92 | { 0, NULL, NULL, NULL } | |
93 | }; | |
94 | ||
95 | DECLARE_MODULE_AV2(message, modinit, moddeinit, message_clist, NULL, NULL, message_cap_list, NULL, message_desc); | |
96 | ||
97 | struct entity | |
98 | { | |
99 | void *ptr; | |
100 | int type; | |
101 | int flags; | |
102 | }; | |
103 | ||
104 | static int build_target_list(enum message_type msgtype, | |
105 | struct Client *client_p, | |
106 | struct Client *source_p, const char *nicks_channels, const char *text); | |
107 | ||
108 | static bool flood_attack_client(enum message_type msgtype, struct Client *source_p, struct Client *target_p); | |
109 | ||
110 | /* Fifteen seconds should be plenty for a client to reply a ctcp */ | |
111 | #define LARGE_CTCP_TIME 15 | |
112 | ||
113 | #define ENTITY_NONE 0 | |
114 | #define ENTITY_CHANNEL 1 | |
115 | #define ENTITY_CHANNEL_OPMOD 2 | |
116 | #define ENTITY_CHANOPS_ON_CHANNEL 3 | |
117 | #define ENTITY_CLIENT 4 | |
118 | ||
119 | static struct entity targets[512]; | |
120 | static int ntargets = 0; | |
121 | ||
122 | static bool duplicate_ptr(void *); | |
123 | ||
124 | static void msg_channel(enum message_type msgtype, | |
125 | struct Client *client_p, | |
126 | struct Client *source_p, struct Channel *chptr, const char *text); | |
127 | ||
128 | static void msg_channel_opmod(enum message_type msgtype, | |
129 | struct Client *client_p, | |
130 | struct Client *source_p, struct Channel *chptr, | |
131 | const char *text); | |
132 | ||
133 | static void msg_channel_flags(enum message_type msgtype, | |
134 | struct Client *client_p, | |
135 | struct Client *source_p, | |
136 | struct Channel *chptr, int flags, const char *text); | |
137 | ||
138 | static void msg_client(enum message_type msgtype, | |
139 | struct Client *source_p, struct Client *target_p, const char *text); | |
140 | ||
141 | static void handle_special(enum message_type msgtype, | |
142 | struct Client *client_p, struct Client *source_p, const char *nick, | |
143 | const char *text); | |
144 | ||
145 | /* | |
146 | ** m_privmsg | |
147 | ** | |
148 | ** massive cleanup | |
149 | ** rev argv 6/91 | |
150 | ** | |
151 | ** Another massive cleanup Nov, 2000 | |
152 | ** (I don't think there is a single line left from 6/91. Maybe.) | |
153 | ** m_privmsg and m_notice do basically the same thing. | |
154 | ** in the original 2.8.2 code base, they were the same function | |
155 | ** "m_message.c." When we did the great cleanup in conjuncton with bleep | |
156 | ** of ircu fame, we split m_privmsg.c and m_notice.c. | |
157 | ** I don't see the point of that now. Its harder to maintain, its | |
158 | ** easier to introduce bugs into one version and not the other etc. | |
159 | ** Really, the penalty of an extra function call isn't that big a deal folks. | |
160 | ** -db Nov 13, 2000 | |
161 | ** | |
162 | */ | |
163 | const char *cmdname[MESSAGE_TYPE_COUNT] = { | |
164 | [MESSAGE_TYPE_PRIVMSG] = "PRIVMSG", | |
165 | [MESSAGE_TYPE_NOTICE] = "NOTICE", | |
166 | }; | |
167 | ||
168 | static void | |
169 | m_privmsg(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
170 | { | |
171 | m_message(MESSAGE_TYPE_PRIVMSG, msgbuf_p, client_p, source_p, parc, parv); | |
172 | } | |
173 | ||
174 | static void | |
175 | m_notice(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
176 | { | |
177 | m_message(MESSAGE_TYPE_NOTICE, msgbuf_p, client_p, source_p, parc, parv); | |
178 | } | |
179 | ||
180 | /* | |
181 | * inputs - flag privmsg or notice | |
182 | * - pointer to client_p | |
183 | * - pointer to source_p | |
184 | * - pointer to channel | |
185 | */ | |
186 | static void | |
187 | m_message(enum message_type msgtype, struct MsgBuf *msgbuf_p, | |
188 | struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
189 | { | |
190 | int i; | |
191 | ||
192 | if(parc < 2 || EmptyString(parv[1])) | |
193 | { | |
194 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
195 | sendto_one(source_p, form_str(ERR_NORECIPIENT), me.name, | |
196 | source_p->name, cmdname[msgtype]); | |
197 | return; | |
198 | } | |
199 | ||
200 | if(parc < 3 || EmptyString(parv[2])) | |
201 | { | |
202 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
203 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
204 | return; | |
205 | } | |
206 | ||
207 | /* Finish the flood grace period if theyre not messaging themselves | |
208 | * as some clients (ircN) do this as a "lag check" | |
209 | */ | |
210 | if(MyClient(source_p) && !IsFloodDone(source_p) && irccmp(source_p->name, parv[1])) | |
211 | flood_endgrace(source_p); | |
212 | ||
213 | if(build_target_list(msgtype, client_p, source_p, parv[1], parv[2]) < 0) | |
214 | { | |
215 | return; | |
216 | } | |
217 | ||
218 | for(i = 0; i < ntargets; i++) | |
219 | { | |
220 | switch (targets[i].type) | |
221 | { | |
222 | case ENTITY_CHANNEL: | |
223 | msg_channel(msgtype, client_p, source_p, | |
224 | (struct Channel *) targets[i].ptr, parv[2]); | |
225 | break; | |
226 | ||
227 | case ENTITY_CHANNEL_OPMOD: | |
228 | msg_channel_opmod(msgtype, client_p, source_p, | |
229 | (struct Channel *) targets[i].ptr, parv[2]); | |
230 | break; | |
231 | ||
232 | case ENTITY_CHANOPS_ON_CHANNEL: | |
233 | msg_channel_flags(msgtype, client_p, source_p, | |
234 | (struct Channel *) targets[i].ptr, | |
235 | targets[i].flags, parv[2]); | |
236 | break; | |
237 | ||
238 | case ENTITY_CLIENT: | |
239 | msg_client(msgtype, source_p, | |
240 | (struct Client *) targets[i].ptr, parv[2]); | |
241 | break; | |
242 | } | |
243 | } | |
244 | } | |
245 | ||
246 | static void | |
247 | m_echo(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, | |
248 | int parc, const char *parv[]) | |
249 | { | |
250 | struct Client *target_p = find_person(parv[2]); | |
251 | enum message_type msgtype; | |
252 | ||
253 | if (target_p == NULL) | |
254 | return; | |
255 | ||
256 | switch (parv[1][0]) | |
257 | { | |
258 | case 'P': msgtype = MESSAGE_TYPE_PRIVMSG; break; | |
259 | case 'N': msgtype = MESSAGE_TYPE_NOTICE; break; | |
260 | default: return; | |
261 | } | |
262 | ||
263 | echo_msg(source_p, target_p, msgtype, parv[3]); | |
264 | } | |
265 | ||
266 | /* | |
267 | * build_target_list | |
268 | * | |
269 | * inputs - pointer to given client_p (server) | |
270 | * - pointer to given source (oper/client etc.) | |
271 | * - pointer to list of nicks/channels | |
272 | * - pointer to table to place results | |
273 | * - pointer to text (only used if source_p is an oper) | |
274 | * output - number of valid entities | |
275 | * side effects - target_table is modified to contain a list of | |
276 | * pointers to channels or clients | |
277 | * if source client is an oper | |
278 | * all the classic old bizzare oper privmsg tricks | |
279 | * are parsed and sent as is, if prefixed with $ | |
280 | * to disambiguate. | |
281 | */ | |
282 | ||
283 | static int | |
284 | build_target_list(enum message_type msgtype, struct Client *client_p, | |
285 | struct Client *source_p, const char *nicks_channels, const char *text) | |
286 | { | |
287 | int type; | |
288 | char *p, *nick, *target_list; | |
289 | struct Channel *chptr = NULL; | |
290 | struct Client *target_p; | |
291 | ||
292 | target_list = LOCAL_COPY(nicks_channels); /* skip strcpy for non-lazyleafs */ | |
293 | ||
294 | ntargets = 0; | |
295 | ||
296 | for(nick = rb_strtok_r(target_list, ",", &p); nick; nick = rb_strtok_r(NULL, ",", &p)) | |
297 | { | |
298 | char *with_prefix; | |
299 | /* | |
300 | * channels are privmsg'd a lot more than other clients, moved up | |
301 | * here plain old channel msg? | |
302 | */ | |
303 | ||
304 | if(IsChanPrefix(*nick)) | |
305 | { | |
306 | /* ignore send of local channel to a server (should not happen) */ | |
307 | if(IsServer(client_p) && *nick == '&') | |
308 | continue; | |
309 | ||
310 | if((chptr = find_channel(nick)) != NULL) | |
311 | { | |
312 | if(!duplicate_ptr(chptr)) | |
313 | { | |
314 | if(ntargets >= ConfigFileEntry.max_targets) | |
315 | { | |
316 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
317 | me.name, source_p->name, nick); | |
318 | return (1); | |
319 | } | |
320 | targets[ntargets].ptr = (void *) chptr; | |
321 | targets[ntargets++].type = ENTITY_CHANNEL; | |
322 | } | |
323 | } | |
324 | ||
325 | /* non existant channel */ | |
326 | else if(msgtype != MESSAGE_TYPE_NOTICE) | |
327 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
328 | form_str(ERR_NOSUCHNICK), nick); | |
329 | ||
330 | continue; | |
331 | } | |
332 | ||
333 | if(MyClient(source_p)) | |
334 | target_p = find_named_person(nick); | |
335 | else | |
336 | target_p = find_person(nick); | |
337 | ||
338 | /* look for a privmsg to another client */ | |
339 | if(target_p) | |
340 | { | |
341 | if(!duplicate_ptr(target_p)) | |
342 | { | |
343 | if(ntargets >= ConfigFileEntry.max_targets) | |
344 | { | |
345 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
346 | me.name, source_p->name, nick); | |
347 | return (1); | |
348 | } | |
349 | targets[ntargets].ptr = (void *) target_p; | |
350 | targets[ntargets].type = ENTITY_CLIENT; | |
351 | targets[ntargets++].flags = 0; | |
352 | } | |
353 | continue; | |
354 | } | |
355 | ||
356 | /* @#channel or +#channel message ? */ | |
357 | ||
358 | type = 0; | |
359 | with_prefix = nick; | |
360 | /* allow %+@ if someone wants to do that */ | |
361 | for(;;) | |
362 | { | |
363 | if(*nick == '@') | |
364 | type |= CHFL_CHANOP; | |
365 | else if(*nick == '+') | |
366 | type |= CHFL_CHANOP | CHFL_VOICE; | |
367 | else | |
368 | break; | |
369 | nick++; | |
370 | } | |
371 | ||
372 | if(type != 0) | |
373 | { | |
374 | /* no recipient.. */ | |
375 | if(EmptyString(nick)) | |
376 | { | |
377 | sendto_one(source_p, form_str(ERR_NORECIPIENT), | |
378 | me.name, source_p->name, cmdname[msgtype]); | |
379 | continue; | |
380 | } | |
381 | ||
382 | /* At this point, nick+1 should be a channel name i.e. #foo or &foo | |
383 | * if the channel is found, fine, if not report an error | |
384 | */ | |
385 | ||
386 | if((chptr = find_channel(nick)) != NULL) | |
387 | { | |
388 | struct membership *msptr; | |
389 | ||
390 | msptr = find_channel_membership(chptr, source_p); | |
391 | ||
392 | if(!IsServer(source_p) && !IsService(source_p) && !is_chanop_voiced(msptr)) | |
393 | { | |
394 | sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED), | |
395 | get_id(&me, source_p), | |
396 | get_id(source_p, source_p), | |
397 | with_prefix); | |
398 | continue; | |
399 | } | |
400 | ||
401 | if(!duplicate_ptr(chptr)) | |
402 | { | |
403 | if(ntargets >= ConfigFileEntry.max_targets) | |
404 | { | |
405 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
406 | me.name, source_p->name, nick); | |
407 | return (1); | |
408 | } | |
409 | targets[ntargets].ptr = (void *) chptr; | |
410 | targets[ntargets].type = ENTITY_CHANOPS_ON_CHANNEL; | |
411 | targets[ntargets++].flags = type; | |
412 | } | |
413 | } | |
414 | else if(msgtype != MESSAGE_TYPE_NOTICE) | |
415 | { | |
416 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
417 | form_str(ERR_NOSUCHNICK), nick); | |
418 | } | |
419 | ||
420 | continue; | |
421 | } | |
422 | ||
423 | if(IsServer(client_p) && *nick == '=' && nick[1] == '#') | |
424 | { | |
425 | nick++; | |
426 | if((chptr = find_channel(nick)) != NULL) | |
427 | { | |
428 | if(!duplicate_ptr(chptr)) | |
429 | { | |
430 | if(ntargets >= ConfigFileEntry.max_targets) | |
431 | { | |
432 | sendto_one(source_p, form_str(ERR_TOOMANYTARGETS), | |
433 | me.name, source_p->name, nick); | |
434 | return (1); | |
435 | } | |
436 | targets[ntargets].ptr = (void *) chptr; | |
437 | targets[ntargets++].type = ENTITY_CHANNEL_OPMOD; | |
438 | } | |
439 | } | |
440 | ||
441 | /* non existant channel */ | |
442 | else if(msgtype != MESSAGE_TYPE_NOTICE) | |
443 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
444 | form_str(ERR_NOSUCHNICK), nick); | |
445 | ||
446 | continue; | |
447 | } | |
448 | ||
449 | if(strchr(nick, '@') || (IsOper(source_p) && (*nick == '$'))) | |
450 | { | |
451 | handle_special(msgtype, client_p, source_p, nick, text); | |
452 | continue; | |
453 | } | |
454 | ||
455 | /* no matching anything found - error if not NOTICE */ | |
456 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
457 | { | |
458 | /* dont give this numeric when source is local, | |
459 | * because its misleading --anfl | |
460 | */ | |
461 | if(!MyClient(source_p) && IsDigit(*nick)) | |
462 | sendto_one(source_p, ":%s %d %s * :Target left IRC. " | |
463 | "Failed to deliver: [%.20s]", | |
464 | get_id(&me, source_p), ERR_NOSUCHNICK, | |
465 | get_id(source_p, source_p), text); | |
466 | else | |
467 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
468 | form_str(ERR_NOSUCHNICK), nick); | |
469 | } | |
470 | ||
471 | } | |
472 | return (1); | |
473 | } | |
474 | ||
475 | /* | |
476 | * duplicate_ptr | |
477 | * | |
478 | * inputs - pointer to check | |
479 | * - pointer to table of entities | |
480 | * - number of valid entities so far | |
481 | * output - true if duplicate pointer in table, false if not. | |
482 | * note, this does the canonize using pointers | |
483 | * side effects - NONE | |
484 | */ | |
485 | static bool | |
486 | duplicate_ptr(void *ptr) | |
487 | { | |
488 | int i; | |
489 | for(i = 0; i < ntargets; i++) | |
490 | if(targets[i].ptr == ptr) | |
491 | return true; | |
492 | return false; | |
493 | } | |
494 | ||
495 | /* | |
496 | * msg_channel | |
497 | * | |
498 | * inputs - flag privmsg or notice | |
499 | * - pointer to client_p | |
500 | * - pointer to source_p | |
501 | * - pointer to channel | |
502 | * output - NONE | |
503 | * side effects - message given channel | |
504 | * | |
505 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
506 | */ | |
507 | static void | |
508 | msg_channel(enum message_type msgtype, | |
509 | struct Client *client_p, struct Client *source_p, struct Channel *chptr, | |
510 | const char *text) | |
511 | { | |
512 | int result; | |
513 | hook_data_privmsg_channel hdata; | |
514 | ||
515 | if(MyClient(source_p)) | |
516 | { | |
517 | /* idle time shouldn't be reset by notices --fl */ | |
518 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
519 | source_p->localClient->last = rb_current_time(); | |
520 | } | |
521 | ||
522 | hdata.msgtype = msgtype; | |
523 | hdata.source_p = source_p; | |
524 | hdata.chptr = chptr; | |
525 | hdata.text = text; | |
526 | hdata.approved = 0; | |
527 | ||
528 | call_hook(h_privmsg_channel, &hdata); | |
529 | ||
530 | /* memory buffer address may have changed, update pointer */ | |
531 | text = hdata.text; | |
532 | ||
533 | if (hdata.approved != 0) | |
534 | return; | |
535 | ||
536 | /* hook may have reduced the string to nothing. */ | |
537 | if (EmptyString(text)) | |
538 | { | |
539 | /* could be empty after colour stripping and | |
540 | * that would cause problems later */ | |
541 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
542 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
543 | return; | |
544 | } | |
545 | ||
546 | /* chanops and voiced can flood their own channel with impunity */ | |
547 | if((result = can_send(chptr, source_p, NULL))) | |
548 | { | |
549 | if(result != CAN_SEND_OPV && MyClient(source_p) && | |
550 | !IsOperGeneral(source_p) && | |
551 | !add_channel_target(source_p, chptr)) | |
552 | { | |
553 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
554 | me.name, source_p->name, chptr->chname); | |
555 | return; | |
556 | } | |
557 | if(result == CAN_SEND_OPV || | |
558 | !flood_attack_channel(msgtype, source_p, chptr, chptr->chname)) | |
559 | { | |
560 | sendto_channel_flags(client_p, ALL_MEMBERS, source_p, chptr, | |
561 | "%s %s :%s", cmdname[msgtype], chptr->chname, text); | |
562 | } | |
563 | } | |
564 | else if(chptr->mode.mode & MODE_OPMODERATE && | |
565 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || | |
566 | IsMember(source_p, chptr))) | |
567 | { | |
568 | if(MyClient(source_p) && !IsOperGeneral(source_p) && | |
569 | !add_channel_target(source_p, chptr)) | |
570 | { | |
571 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
572 | me.name, source_p->name, chptr->chname); | |
573 | return; | |
574 | } | |
575 | if(!flood_attack_channel(msgtype, source_p, chptr, chptr->chname)) | |
576 | { | |
577 | sendto_channel_opmod(client_p, source_p, chptr, | |
578 | cmdname[msgtype], text); | |
579 | } | |
580 | } | |
581 | else | |
582 | { | |
583 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
584 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
585 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
586 | } | |
587 | } | |
588 | /* | |
589 | * msg_channel_opmod | |
590 | * | |
591 | * inputs - flag privmsg or notice | |
592 | * - pointer to client_p | |
593 | * - pointer to source_p | |
594 | * - pointer to channel | |
595 | * output - NONE | |
596 | * side effects - message given channel ops | |
597 | * | |
598 | * XXX - We need to rework this a bit, it's a tad ugly. --nenolod | |
599 | */ | |
600 | static void | |
601 | msg_channel_opmod(enum message_type msgtype, | |
602 | struct Client *client_p, struct Client *source_p, | |
603 | struct Channel *chptr, const char *text) | |
604 | { | |
605 | hook_data_privmsg_channel hdata; | |
606 | ||
607 | hdata.msgtype = msgtype; | |
608 | hdata.source_p = source_p; | |
609 | hdata.chptr = chptr; | |
610 | hdata.text = text; | |
611 | hdata.approved = 0; | |
612 | ||
613 | call_hook(h_privmsg_channel, &hdata); | |
614 | ||
615 | /* memory buffer address may have changed, update pointer */ | |
616 | text = hdata.text; | |
617 | ||
618 | if (hdata.approved != 0) | |
619 | return; | |
620 | ||
621 | /* hook may have reduced the string to nothing. */ | |
622 | if (EmptyString(text)) | |
623 | { | |
624 | /* could be empty after colour stripping and | |
625 | * that would cause problems later */ | |
626 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
627 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
628 | return; | |
629 | } | |
630 | ||
631 | if(chptr->mode.mode & MODE_OPMODERATE && | |
632 | (!(chptr->mode.mode & MODE_NOPRIVMSGS) || | |
633 | IsMember(source_p, chptr))) | |
634 | { | |
635 | if(!flood_attack_channel(msgtype, source_p, chptr, chptr->chname)) | |
636 | { | |
637 | sendto_channel_opmod(client_p, source_p, chptr, | |
638 | cmdname[msgtype], text); | |
639 | } | |
640 | } | |
641 | else | |
642 | { | |
643 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
644 | sendto_one_numeric(source_p, ERR_CANNOTSENDTOCHAN, | |
645 | form_str(ERR_CANNOTSENDTOCHAN), chptr->chname); | |
646 | } | |
647 | } | |
648 | ||
649 | /* | |
650 | * msg_channel_flags | |
651 | * | |
652 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
653 | * say NOTICE must not auto reply | |
654 | * - pointer to client_p | |
655 | * - pointer to source_p | |
656 | * - pointer to channel | |
657 | * - flags | |
658 | * - pointer to text to send | |
659 | * output - NONE | |
660 | * side effects - message given channel either chanop or voice | |
661 | */ | |
662 | static void | |
663 | msg_channel_flags(enum message_type msgtype, struct Client *client_p, | |
664 | struct Client *source_p, struct Channel *chptr, int flags, const char *text) | |
665 | { | |
666 | int type; | |
667 | char c; | |
668 | hook_data_privmsg_channel hdata; | |
669 | ||
670 | if(flags & CHFL_VOICE) | |
671 | { | |
672 | type = ONLY_CHANOPSVOICED; | |
673 | c = '+'; | |
674 | } | |
675 | else | |
676 | { | |
677 | type = ONLY_CHANOPS; | |
678 | c = '@'; | |
679 | } | |
680 | ||
681 | if(MyClient(source_p)) | |
682 | { | |
683 | /* idle time shouldn't be reset by notices --fl */ | |
684 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
685 | source_p->localClient->last = rb_current_time(); | |
686 | } | |
687 | ||
688 | hdata.msgtype = msgtype; | |
689 | hdata.source_p = source_p; | |
690 | hdata.chptr = chptr; | |
691 | hdata.text = text; | |
692 | hdata.approved = 0; | |
693 | ||
694 | call_hook(h_privmsg_channel, &hdata); | |
695 | ||
696 | /* memory buffer address may have changed, update pointer */ | |
697 | text = hdata.text; | |
698 | ||
699 | if (hdata.approved != 0) | |
700 | return; | |
701 | ||
702 | if (EmptyString(text)) | |
703 | { | |
704 | /* could be empty after colour stripping and | |
705 | * that would cause problems later */ | |
706 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
707 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
708 | return; | |
709 | } | |
710 | ||
711 | sendto_channel_flags(client_p, type, source_p, chptr, "%s %c%s :%s", | |
712 | cmdname[msgtype], c, chptr->chname, text); | |
713 | } | |
714 | ||
715 | static void | |
716 | expire_tgchange(void *unused) | |
717 | { | |
718 | tgchange *target; | |
719 | rb_dlink_node *ptr, *next_ptr; | |
720 | ||
721 | RB_DLINK_FOREACH_SAFE(ptr, next_ptr, tgchange_list.head) | |
722 | { | |
723 | target = ptr->data; | |
724 | ||
725 | if(target->expiry < rb_current_time()) | |
726 | { | |
727 | rb_dlinkDelete(ptr, &tgchange_list); | |
728 | rb_patricia_remove(tgchange_tree, target->pnode); | |
729 | rb_free(target->ip); | |
730 | rb_free(target); | |
731 | } | |
732 | } | |
733 | } | |
734 | ||
735 | static void | |
736 | echo_msg(struct Client *source_p, struct Client *target_p, | |
737 | enum message_type msgtype, const char *text) | |
738 | { | |
739 | if (MyClient(target_p)) | |
740 | { | |
741 | if (!IsCapable(target_p, CLICAP_ECHO_MESSAGE)) | |
742 | return; | |
743 | ||
744 | sendto_one(target_p, ":%s!%s@%s %s %s :%s", | |
745 | target_p->name, target_p->username, target_p->host, | |
746 | cmdname[msgtype], | |
747 | source_p->name, | |
748 | text); | |
749 | return; | |
750 | } | |
751 | ||
752 | if (!(target_p->from->serv->caps & CAP_ECHO)) | |
753 | return; | |
754 | ||
755 | sendto_one(target_p, ":%s ECHO %c %s :%s", | |
756 | use_id(source_p), | |
757 | msgtype == MESSAGE_TYPE_PRIVMSG ? 'P' : 'N', | |
758 | use_id(target_p), | |
759 | text); | |
760 | } | |
761 | ||
762 | /* | |
763 | * msg_client | |
764 | * | |
765 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
766 | * say NOTICE must not auto reply | |
767 | * - pointer to source_p source (struct Client *) | |
768 | * - pointer to target_p target (struct Client *) | |
769 | * - pointer to text | |
770 | * output - NONE | |
771 | * side effects - message given channel either chanop or voice | |
772 | */ | |
773 | static void | |
774 | msg_client(enum message_type msgtype, | |
775 | struct Client *source_p, struct Client *target_p, const char *text) | |
776 | { | |
777 | int do_floodcount = 0; | |
778 | hook_data_privmsg_user hdata; | |
779 | ||
780 | if(MyClient(source_p)) | |
781 | { | |
782 | /* idle time shouldn't be reset by notices --fl */ | |
783 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
784 | source_p->localClient->last = rb_current_time(); | |
785 | ||
786 | /* auto cprivmsg/cnotice */ | |
787 | do_floodcount = !IsOperGeneral(source_p) && | |
788 | !find_allowing_channel(source_p, target_p); | |
789 | ||
790 | /* target change stuff, dont limit ctcp replies as that | |
791 | * would allow people to start filling up random users | |
792 | * targets just by ctcping them | |
793 | */ | |
794 | if((msgtype != MESSAGE_TYPE_NOTICE || *text != '\001') && | |
795 | ConfigFileEntry.target_change && do_floodcount) | |
796 | { | |
797 | if(!add_target(source_p, target_p)) | |
798 | { | |
799 | sendto_one(source_p, form_str(ERR_TARGCHANGE), | |
800 | me.name, source_p->name, target_p->name); | |
801 | return; | |
802 | } | |
803 | } | |
804 | ||
805 | if (do_floodcount && msgtype == MESSAGE_TYPE_NOTICE && *text == '\001' && | |
806 | target_p->large_ctcp_sent + LARGE_CTCP_TIME >= rb_current_time()) | |
807 | do_floodcount = 0; | |
808 | ||
809 | if (do_floodcount && | |
810 | flood_attack_client(msgtype, source_p, target_p)) | |
811 | return; | |
812 | } | |
813 | else if(source_p->from == target_p->from) | |
814 | { | |
815 | sendto_realops_snomask(SNO_DEBUG, L_NETWIDE, | |
816 | "Send message to %s[%s] dropped from %s(Fake Dir)", | |
817 | target_p->name, target_p->from->name, source_p->name); | |
818 | return; | |
819 | } | |
820 | ||
821 | if(MyConnect(source_p) && (msgtype != MESSAGE_TYPE_NOTICE) && target_p->user && target_p->user->away) | |
822 | sendto_one_numeric(source_p, RPL_AWAY, form_str(RPL_AWAY), | |
823 | target_p->name, target_p->user->away); | |
824 | ||
825 | hdata.msgtype = msgtype; | |
826 | hdata.source_p = source_p; | |
827 | hdata.target_p = target_p; | |
828 | hdata.text = text; | |
829 | hdata.approved = 0; | |
830 | ||
831 | call_hook(h_privmsg_user, &hdata); | |
832 | ||
833 | /* buffer location may have changed. */ | |
834 | text = hdata.text; | |
835 | ||
836 | if (hdata.approved != 0) | |
837 | return; | |
838 | ||
839 | if(MyClient(target_p)) | |
840 | { | |
841 | if (EmptyString(text)) | |
842 | { | |
843 | /* could be empty after colour stripping and | |
844 | * that would cause problems later */ | |
845 | if(msgtype != MESSAGE_TYPE_NOTICE) | |
846 | sendto_one(source_p, form_str(ERR_NOTEXTTOSEND), me.name, source_p->name); | |
847 | return; | |
848 | } | |
849 | ||
850 | add_reply_target(target_p, source_p); | |
851 | sendto_anywhere(target_p, source_p, cmdname[msgtype], ":%s", text); | |
852 | echo_msg(target_p, source_p, msgtype, text); | |
853 | } | |
854 | else | |
855 | sendto_anywhere(target_p, source_p, cmdname[msgtype], ":%s", text); | |
856 | ||
857 | return; | |
858 | } | |
859 | ||
860 | /* | |
861 | * flood_attack_client | |
862 | * inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC | |
863 | * says NOTICE must not auto reply | |
864 | * - pointer to source Client | |
865 | * - pointer to target Client | |
866 | * output - true if target is under flood attack | |
867 | * side effects - check for flood attack on target target_p | |
868 | */ | |
869 | static bool | |
870 | flood_attack_client(enum message_type msgtype, struct Client *source_p, struct Client *target_p) | |
871 | { | |
872 | int delta; | |
873 | ||
874 | /* Services could get many messages legitimately and | |
875 | * can be messaged without rate limiting via aliases | |
876 | * and msg user@server. | |
877 | * -- jilles | |
878 | */ | |
879 | if(GlobalSetOptions.floodcount && IsClient(source_p) && source_p != target_p && !IsService(target_p) && !HasPrivilege(target_p, "oper:free_target")) | |
880 | { | |
881 | if((target_p->first_received_message_time + 1) < rb_current_time()) | |
882 | { | |
883 | delta = rb_current_time() - target_p->first_received_message_time; | |
884 | target_p->received_number_of_privmsgs -= delta; | |
885 | target_p->first_received_message_time = rb_current_time(); | |
886 | if(target_p->received_number_of_privmsgs <= 0) | |
887 | { | |
888 | target_p->received_number_of_privmsgs = 0; | |
889 | target_p->flood_noticed = 0; | |
890 | } | |
891 | } | |
892 | ||
893 | if((target_p->received_number_of_privmsgs >= | |
894 | GlobalSetOptions.floodcount) || target_p->flood_noticed) | |
895 | { | |
896 | if(target_p->flood_noticed == 0) | |
897 | { | |
898 | sendto_realops_snomask(SNO_BOTS, L_NETWIDE, | |
899 | "Possible Flooder %s[%s@%s] on %s target: %s", | |
900 | source_p->name, source_p->username, | |
901 | source_p->orighost, | |
902 | source_p->servptr->name, target_p->name); | |
903 | target_p->flood_noticed = 1; | |
904 | /* add a bit of penalty */ | |
905 | target_p->received_number_of_privmsgs += 2; | |
906 | } | |
907 | if(MyClient(source_p) && (msgtype != MESSAGE_TYPE_NOTICE)) | |
908 | sendto_one(source_p, | |
909 | ":%s NOTICE %s :*** Message to %s throttled due to flooding", | |
910 | me.name, source_p->name, target_p->name); | |
911 | return true; | |
912 | } | |
913 | else | |
914 | target_p->received_number_of_privmsgs++; | |
915 | } | |
916 | ||
917 | return false; | |
918 | } | |
919 | ||
920 | /* | |
921 | * handle_special | |
922 | * | |
923 | * inputs - server pointer | |
924 | * - client pointer | |
925 | * - nick stuff to grok for opers | |
926 | * - text to send if grok | |
927 | * output - none | |
928 | * side effects - all the traditional oper type messages are parsed here. | |
929 | * i.e. "/msg #some.host." | |
930 | * However, syntax has been changed. | |
931 | * previous syntax "/msg #some.host.mask" | |
932 | * now becomes "/msg $#some.host.mask" | |
933 | * previous syntax of: "/msg $some.server.mask" remains | |
934 | * This disambiguates the syntax. | |
935 | */ | |
936 | static void | |
937 | handle_special(enum message_type msgtype, struct Client *client_p, | |
938 | struct Client *source_p, const char *nick, const char *text) | |
939 | { | |
940 | struct Client *target_p; | |
941 | char *server; | |
942 | ||
943 | /* user[%host]@server addressed? | |
944 | * NOTE: users can send to user@server, but not user%host@server | |
945 | * or opers@server | |
946 | */ | |
947 | if((server = strchr(nick, '@')) != NULL) | |
948 | { | |
949 | if((target_p = find_server(source_p, server + 1)) == NULL) | |
950 | { | |
951 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, | |
952 | form_str(ERR_NOSUCHSERVER), server + 1); | |
953 | return; | |
954 | } | |
955 | ||
956 | if(!IsOper(source_p)) | |
957 | { | |
958 | if(strchr(nick, '%') || (strncmp(nick, "opers", 5) == 0)) | |
959 | { | |
960 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
961 | form_str(ERR_NOSUCHNICK), nick); | |
962 | return; | |
963 | } | |
964 | } | |
965 | ||
966 | /* somewhere else.. */ | |
967 | if(!IsMe(target_p)) | |
968 | { | |
969 | sendto_one(target_p, ":%s %s %s :%s", | |
970 | get_id(source_p, target_p), cmdname[msgtype], nick, text); | |
971 | return; | |
972 | } | |
973 | ||
974 | /* Check if someones msg'ing opers@our.server */ | |
975 | if(strncmp(nick, "opers@", 6) == 0) | |
976 | { | |
977 | sendto_realops_snomask(SNO_GENERAL, L_ALL, "To opers: From: %s: %s", | |
978 | source_p->name, text); | |
979 | return; | |
980 | } | |
981 | ||
982 | /* This was not very useful except for bypassing certain | |
983 | * restrictions. Note that we still allow sending to | |
984 | * remote servers this way, for messaging pseudoservers | |
985 | * securely whether they have a service{} block or not. | |
986 | * -- jilles | |
987 | */ | |
988 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
989 | form_str(ERR_NOSUCHNICK), nick); | |
990 | return; | |
991 | } | |
992 | ||
993 | /* | |
994 | * the following two cases allow masks in NOTICEs | |
995 | * (for OPERs only) | |
996 | * | |
997 | * Armin, 8Jun90 (gruner@informatik.tu-muenchen.de) | |
998 | */ | |
999 | if(IsOper(source_p) && *nick == '$') | |
1000 | { | |
1001 | if((*(nick + 1) == '$' || *(nick + 1) == '#')) | |
1002 | nick++; | |
1003 | else if(MyOper(source_p)) | |
1004 | { | |
1005 | sendto_one(source_p, | |
1006 | ":%s NOTICE %s :The command %s %s is no longer supported, please use $%s", | |
1007 | me.name, source_p->name, cmdname[msgtype], nick, nick); | |
1008 | return; | |
1009 | } | |
1010 | ||
1011 | if(MyClient(source_p) && !IsOperMassNotice(source_p)) | |
1012 | { | |
1013 | sendto_one(source_p, form_str(ERR_NOPRIVS), | |
1014 | me.name, source_p->name, "mass_notice"); | |
1015 | return; | |
1016 | } | |
1017 | ||
1018 | if(MyClient(source_p)) | |
1019 | { | |
1020 | sendto_realops_snomask(SNO_GENERAL, L_ALL | L_NETWIDE, "%s sent mass-%s to %s: %s", | |
1021 | get_oper_name(source_p), | |
1022 | msgtype == MESSAGE_TYPE_PRIVMSG ? "privmsg" : "notice", | |
1023 | nick, text); | |
1024 | } | |
1025 | ||
1026 | sendto_match_butone(IsServer(client_p) ? client_p : NULL, source_p, | |
1027 | nick + 1, | |
1028 | (*nick == '#') ? MATCH_HOST : MATCH_SERVER, | |
1029 | "%s $%s :%s", cmdname[msgtype], nick, text); | |
1030 | if (msgtype != MESSAGE_TYPE_NOTICE && *text == '\001') | |
1031 | source_p->large_ctcp_sent = rb_current_time(); | |
1032 | return; | |
1033 | } | |
1034 | } |