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Log some internal errors on DEFAULT loglevel instead of DEBUG, log detected errors...
[user/henk/code/inspircd.git] / src / modules / m_callerid.cpp
1 /*
2  * InspIRCd -- Internet Relay Chat Daemon
3  *
4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
5  *   Copyright (C) 2008-2009 Robin Burchell <robin+git@viroteck.net>
6  *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
7  *   Copyright (C) 2008 Craig Edwards <craigedwards@brainbox.cc>
8  *
9  * This file is part of InspIRCd.  InspIRCd is free software: you can
10  * redistribute it and/or modify it under the terms of the GNU General Public
11  * License as published by the Free Software Foundation, version 2.
12  *
13  * This program is distributed in the hope that it will be useful, but WITHOUT
14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
16  * details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22
23 #include "inspircd.h"
24
25 /* $ModDesc: Implementation of callerid, usermode +g, /accept */
26
27 class callerid_data
28 {
29  public:
30         time_t lastnotify;
31
32         /** Users I accept messages from
33          */
34         std::set<User*> accepting;
35
36         /** Users who list me as accepted
37          */
38         std::list<callerid_data *> wholistsme;
39
40         callerid_data() : lastnotify(0) { }
41
42         std::string ToString(SerializeFormat format) const
43         {
44                 std::ostringstream oss;
45                 oss << lastnotify;
46                 for (std::set<User*>::const_iterator i = accepting.begin(); i != accepting.end(); ++i)
47                 {
48                         User* u = *i;
49                         // Encode UIDs.
50                         oss << "," << (format == FORMAT_USER ? u->nick : u->uuid);
51                 }
52                 return oss.str();
53         }
54 };
55
56 struct CallerIDExtInfo : public ExtensionItem
57 {
58         CallerIDExtInfo(Module* parent)
59                 : ExtensionItem("callerid_data", parent)
60         {
61         }
62
63         std::string serialize(SerializeFormat format, const Extensible* container, void* item) const
64         {
65                 callerid_data* dat = static_cast<callerid_data*>(item);
66                 return dat->ToString(format);
67         }
68
69         void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
70         {
71                 callerid_data* dat = new callerid_data;
72                 irc::commasepstream s(value);
73                 std::string tok;
74                 if (s.GetToken(tok))
75                         dat->lastnotify = ConvToInt(tok);
76
77                 while (s.GetToken(tok))
78                 {
79                         if (tok.empty())
80                                 continue;
81
82                         User *u = ServerInstance->FindNick(tok);
83                         if ((u) && (u->registered == REG_ALL) && (!u->quitting) && (!IS_SERVER(u)))
84                         {
85                                 if (dat->accepting.insert(u).second)
86                                 {
87                                         callerid_data* other = this->get(u, true);
88                                         other->wholistsme.push_back(dat);
89                                 }
90                         }
91                 }
92
93                 void* old = set_raw(container, dat);
94                 if (old)
95                         this->free(old);
96         }
97
98         callerid_data* get(User* user, bool create)
99         {
100                 callerid_data* dat = static_cast<callerid_data*>(get_raw(user));
101                 if (create && !dat)
102                 {
103                         dat = new callerid_data;
104                         set_raw(user, dat);
105                 }
106                 return dat;
107         }
108
109         void free(void* item)
110         {
111                 callerid_data* dat = static_cast<callerid_data*>(item);
112
113                 // We need to walk the list of users on our accept list, and remove ourselves from their wholistsme.
114                 for (std::set<User *>::iterator it = dat->accepting.begin(); it != dat->accepting.end(); it++)
115                 {
116                         callerid_data *targ = this->get(*it, false);
117
118                         if (!targ)
119                         {
120                                 ServerInstance->Logs->Log("m_callerid", DEFAULT, "ERROR: Inconsistency detected in callerid state, please report (1)");
121                                 continue; // shouldn't happen, but oh well.
122                         }
123
124                         std::list<callerid_data*>::iterator it2 = std::find(targ->wholistsme.begin(), targ->wholistsme.end(), dat);
125                         if (it2 != targ->wholistsme.end())
126                                 targ->wholistsme.erase(it2);
127                         else
128                                 ServerInstance->Logs->Log("m_callerid", DEFAULT, "ERROR: Inconsistency detected in callerid state, please report (2)");
129                 }
130                 delete dat;
131         }
132 };
133
134 class User_g : public SimpleUserModeHandler
135 {
136 public:
137         User_g(Module* Creator) : SimpleUserModeHandler(Creator, "callerid", 'g') { }
138 };
139
140 class CommandAccept : public Command
141 {
142 public:
143         CallerIDExtInfo extInfo;
144         unsigned int maxaccepts;
145         CommandAccept(Module* Creator) : Command(Creator, "ACCEPT", 1),
146                 extInfo(Creator)
147         {
148                 allow_empty_last_param = false;
149                 syntax = "{[+|-]<nicks>}|*}";
150                 TRANSLATE2(TR_CUSTOM, TR_END);
151         }
152
153         virtual void EncodeParameter(std::string& parameter, int index)
154         {
155                 if (index != 0)
156                         return;
157                 std::string out;
158                 irc::commasepstream nicks(parameter);
159                 std::string tok;
160                 while (nicks.GetToken(tok))
161                 {
162                         if (tok == "*")
163                         {
164                                 continue; // Drop list requests, since remote servers ignore them anyway.
165                         }
166                         if (!out.empty())
167                                 out.append(",");
168                         bool dash = false;
169                         if (tok[0] == '-')
170                         {
171                                 dash = true;
172                                 tok.erase(0, 1); // Remove the dash.
173                         }
174                         User* u = ServerInstance->FindNick(tok);
175                         if ((!u) || (u->registered != REG_ALL) || (u->quitting) || (IS_SERVER(u)))
176                                 continue;
177
178                         if (dash)
179                                 out.append("-");
180                         out.append(u->uuid);
181                 }
182                 parameter = out;
183         }
184
185         /** Will take any number of nicks (up to MaxTargets), which can be seperated by commas.
186          * - in front of any nick removes, and an * lists. This effectively means you can do:
187          * /accept nick1,nick2,nick3,*
188          * to add 3 nicks and then show your list
189          */
190         CmdResult Handle(const std::vector<std::string> &parameters, User* user)
191         {
192                 if (ServerInstance->Parser->LoopCall(user, this, parameters, 0))
193                         return CMD_SUCCESS;
194                 /* Even if callerid mode is not set, we let them manage their ACCEPT list so that if they go +g they can
195                  * have a list already setup. */
196
197                 std::string tok = parameters[0];
198
199                 if (tok == "*")
200                 {
201                         if (IS_LOCAL(user))
202                                 ListAccept(user);
203                         return CMD_SUCCESS;
204                 }
205                 else if (tok[0] == '-')
206                 {
207                         User* whotoremove = ServerInstance->FindNick(tok.substr(1));
208                         if (whotoremove)
209                                 return (RemoveAccept(user, whotoremove) ? CMD_SUCCESS : CMD_FAILURE);
210                         else
211                                 return CMD_FAILURE;
212                 }
213                 else
214                 {
215                         User* whotoadd = ServerInstance->FindNick(tok[0] == '+' ? tok.substr(1) : tok);
216                         if ((whotoadd) && (whotoadd->registered == REG_ALL) && (!whotoadd->quitting) && (!IS_SERVER(whotoadd)))
217                                 return (AddAccept(user, whotoadd) ? CMD_SUCCESS : CMD_FAILURE);
218                         else
219                         {
220                                 user->WriteNumeric(401, "%s %s :No such nick/channel", user->nick.c_str(), tok.c_str());
221                                 return CMD_FAILURE;
222                         }
223                 }
224         }
225
226         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
227         {
228                 return ROUTE_BROADCAST;
229         }
230
231         void ListAccept(User* user)
232         {
233                 callerid_data* dat = extInfo.get(user, false);
234                 if (dat)
235                 {
236                         for (std::set<User*>::iterator i = dat->accepting.begin(); i != dat->accepting.end(); ++i)
237                                 user->WriteNumeric(281, "%s %s", user->nick.c_str(), (*i)->nick.c_str());
238                 }
239                 user->WriteNumeric(282, "%s :End of ACCEPT list", user->nick.c_str());
240         }
241
242         bool AddAccept(User* user, User* whotoadd)
243         {
244                 // Add this user to my accept list first, so look me up..
245                 callerid_data* dat = extInfo.get(user, true);
246                 if (dat->accepting.size() >= maxaccepts)
247                 {
248                         user->WriteNumeric(456, "%s :Accept list is full (limit is %d)", user->nick.c_str(), maxaccepts);
249                         return false;
250                 }
251                 if (!dat->accepting.insert(whotoadd).second)
252                 {
253                         user->WriteNumeric(457, "%s %s :is already on your accept list", user->nick.c_str(), whotoadd->nick.c_str());
254                         return false;
255                 }
256
257                 // Now, look them up, and add me to their list
258                 callerid_data *targ = extInfo.get(whotoadd, true);
259                 targ->wholistsme.push_back(dat);
260
261                 user->WriteServ("NOTICE %s :%s is now on your accept list", user->nick.c_str(), whotoadd->nick.c_str());
262                 return true;
263         }
264
265         bool RemoveAccept(User* user, User* whotoremove)
266         {
267                 // Remove them from my list, so look up my list..
268                 callerid_data* dat = extInfo.get(user, false);
269                 if (!dat)
270                 {
271                         user->WriteNumeric(458, "%s %s :is not on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
272                         return false;
273                 }
274                 std::set<User*>::iterator i = dat->accepting.find(whotoremove);
275                 if (i == dat->accepting.end())
276                 {
277                         user->WriteNumeric(458, "%s %s :is not on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
278                         return false;
279                 }
280
281                 dat->accepting.erase(i);
282
283                 // Look up their list to remove me.
284                 callerid_data *dat2 = extInfo.get(whotoremove, false);
285                 if (!dat2)
286                 {
287                         // How the fuck is this possible.
288                         ServerInstance->Logs->Log("m_callerid", DEFAULT, "ERROR: Inconsistency detected in callerid state, please report (3)");
289                         return false;
290                 }
291
292                 std::list<callerid_data*>::iterator it = std::find(dat2->wholistsme.begin(), dat2->wholistsme.end(), dat);
293                 if (it != dat2->wholistsme.end())
294                         // Found me!
295                         dat2->wholistsme.erase(it);
296                 else
297                         ServerInstance->Logs->Log("m_callerid", DEFAULT, "ERROR: Inconsistency detected in callerid state, please report (4)");
298
299
300                 user->WriteServ("NOTICE %s :%s is no longer on your accept list", user->nick.c_str(), whotoremove->nick.c_str());
301                 return true;
302         }
303 };
304
305 class ModuleCallerID : public Module
306 {
307 private:
308         CommandAccept cmd;
309         User_g myumode;
310
311         // Configuration variables:
312         bool operoverride; // Operators can override callerid.
313         bool tracknick; // Allow ACCEPT entries to update with nick changes.
314         unsigned int notify_cooldown; // Seconds between notifications.
315
316         /** Removes a user from all accept lists
317          * @param who The user to remove from accepts
318          */
319         void RemoveFromAllAccepts(User* who)
320         {
321                 // First, find the list of people who have me on accept
322                 callerid_data *userdata = cmd.extInfo.get(who, false);
323                 if (!userdata)
324                         return;
325
326                 // Iterate over the list of people who accept me, and remove all entries
327                 for (std::list<callerid_data *>::iterator it = userdata->wholistsme.begin(); it != userdata->wholistsme.end(); it++)
328                 {
329                         callerid_data *dat = *(it);
330
331                         // Find me on their callerid list
332                         std::set<User *>::iterator it2 = dat->accepting.find(who);
333
334                         if (it2 != dat->accepting.end())
335                                 dat->accepting.erase(it2);
336                         else
337                                 ServerInstance->Logs->Log("m_callerid", DEFAULT, "ERROR: Inconsistency detected in callerid state, please report (5)");
338                 }
339
340                 userdata->wholistsme.clear();
341         }
342
343 public:
344         ModuleCallerID() : cmd(this), myumode(this)
345         {
346         }
347
348         void init()
349         {
350                 OnRehash(NULL);
351
352                 ServerInstance->Modules->AddService(myumode);
353                 ServerInstance->Modules->AddService(cmd);
354                 ServerInstance->Modules->AddService(cmd.extInfo);
355
356                 Implementation eventlist[] = { I_OnRehash, I_OnUserPostNick, I_OnUserQuit, I_On005Numeric, I_OnUserPreNotice, I_OnUserPreMessage };
357                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
358         }
359
360         virtual ~ModuleCallerID()
361         {
362         }
363
364         virtual Version GetVersion()
365         {
366                 return Version("Implementation of callerid, usermode +g, /accept", VF_COMMON | VF_VENDOR);
367         }
368
369         virtual void On005Numeric(std::string& output)
370         {
371                 output += " CALLERID=g";
372         }
373
374         ModResult PreText(User* user, User* dest, std::string& text)
375         {
376                 if (!dest->IsModeSet('g') || (user == dest))
377                         return MOD_RES_PASSTHRU;
378
379                 if (operoverride && IS_OPER(user))
380                         return MOD_RES_PASSTHRU;
381
382                 callerid_data* dat = cmd.extInfo.get(dest, true);
383                 std::set<User*>::iterator i = dat->accepting.find(user);
384
385                 if (i == dat->accepting.end())
386                 {
387                         time_t now = ServerInstance->Time();
388                         /* +g and *not* accepted */
389                         user->WriteNumeric(716, "%s %s :is in +g mode (server-side ignore).", user->nick.c_str(), dest->nick.c_str());
390                         if (now > (dat->lastnotify + (time_t)notify_cooldown))
391                         {
392                                 user->WriteNumeric(717, "%s %s :has been informed that you messaged them.", user->nick.c_str(), dest->nick.c_str());
393                                 dest->SendText(":%s 718 %s %s %s@%s :is messaging you, and you have umode +g. Use /ACCEPT +%s to allow.",
394                                         ServerInstance->Config->ServerName.c_str(), dest->nick.c_str(), user->nick.c_str(), user->ident.c_str(), user->dhost.c_str(), user->nick.c_str());
395                                 dat->lastnotify = now;
396                         }
397                         return MOD_RES_DENY;
398                 }
399                 return MOD_RES_PASSTHRU;
400         }
401
402         virtual ModResult OnUserPreMessage(User* user, void* dest, int target_type, std::string& text, char status, CUList &exempt_list)
403         {
404                 if (IS_LOCAL(user) && target_type == TYPE_USER)
405                         return PreText(user, (User*)dest, text);
406
407                 return MOD_RES_PASSTHRU;
408         }
409
410         virtual ModResult OnUserPreNotice(User* user, void* dest, int target_type, std::string& text, char status, CUList &exempt_list)
411         {
412                 if (IS_LOCAL(user) && target_type == TYPE_USER)
413                         return PreText(user, (User*)dest, text);
414
415                 return MOD_RES_PASSTHRU;
416         }
417
418         void OnUserPostNick(User* user, const std::string& oldnick)
419         {
420                 if (!tracknick)
421                         RemoveFromAllAccepts(user);
422         }
423
424         void OnUserQuit(User* user, const std::string& message, const std::string& oper_message)
425         {
426                 RemoveFromAllAccepts(user);
427         }
428
429         virtual void OnRehash(User* user)
430         {
431                 ConfigTag* tag = ServerInstance->Config->ConfValue("callerid");
432                 cmd.maxaccepts = tag->getInt("maxaccepts", 16);
433                 operoverride = tag->getBool("operoverride");
434                 tracknick = tag->getBool("tracknick");
435                 notify_cooldown = tag->getInt("cooldown", 60);
436         }
437 };
438
439 MODULE_INIT(ModuleCallerID)
440
441