]> git.netwichtig.de Git - user/henk/code/inspircd.git/blob - src/commands/cmd_nick.cpp
Fix users being unable to register (aquanight, what the fuck were you smoking? :p)
[user/henk/code/inspircd.git] / src / commands / cmd_nick.cpp
1 /*       +------------------------------------+
2  *       | Inspire Internet Relay Chat Daemon |
3  *       +------------------------------------+
4  *
5  *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
6  * See: http://www.inspircd.org/wiki/index.php/Credits
7  *
8  * This program is free but copyrighted software; see
9  *            the file COPYING for details.
10  *
11  * ---------------------------------------------------
12  */
13
14 #include "inspircd.h"
15 #include "xline.h"
16 #include "commands/cmd_nick.h"
17
18 extern "C" DllExport Command* init_command(InspIRCd* Instance)
19 {
20         return new CommandNick(Instance);
21 }
22
23 /** Handle nick changes from users.
24  * NOTE: If you are used to ircds based on ircd2.8, and are looking
25  * for the client introduction code in here, youre in the wrong place.
26  * You need to look in the spanningtree module for this!
27  */
28 CmdResult CommandNick::Handle (const std::vector<std::string>& parameters, User *user)
29 {
30         char oldnick[NICKMAX];
31
32         if (parameters[0].empty())
33         {
34                 /* We cant put blanks in the parameters, so for this (extremely rare) issue we just put '*' here. */
35                 user->WriteNumeric(432, "%s * :Erroneous Nickname", user->nick.empty() ? user->nick.c_str() : "*");
36                 return CMD_FAILURE;
37         }
38
39         if (((!ServerInstance->IsNick(parameters[0].c_str()))) && (IS_LOCAL(user)))
40         {
41                 if (!allowinvalid)
42                 {
43                         if (parameters[0] == "0")
44                         {
45                                 // Special case, Fake a /nick UIDHERE. Useful for evading "ERR: NICK IN USE" on connect etc.
46                                 std::vector<std::string> p2;
47                                 std::deque<classbase*> dummy;
48                                 p2.push_back(user->uuid);
49                                 this->HandleInternal(1, dummy);
50                                 this->Handle(p2, user);
51                                 this->HandleInternal(0, dummy);
52                                 return CMD_SUCCESS;
53                         }
54
55                         user->WriteNumeric(432, "%s %s :Erroneous Nickname", user->nick.c_str(),parameters[0].c_str());
56                         return CMD_FAILURE;
57                 }
58         }
59
60         if (irc::string(user->nick.c_str()) == assign(parameters[0]))
61         {
62                 /* If its exactly the same, even case, dont do anything. */
63                 if (parameters[0] == user->nick)
64                         return CMD_SUCCESS;
65
66                 /* Its a change of case. People insisted that they should be
67                  * able to do silly things like this even though the RFC says
68                  * the nick AAA is the same as the nick aaa.
69                  */
70                 strlcpy(oldnick, user->nick.c_str(), NICKMAX - 1);
71                 int MOD_RESULT = 0;
72                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0].c_str()));
73                 if (MOD_RESULT)
74                         return CMD_FAILURE;
75                 if (user->registered == REG_ALL)
76                         user->WriteCommon("NICK %s",parameters[0].c_str());
77                 user->nick.assign(parameters[0], 0, NICKMAX - 1);
78                 user->InvalidateCache();
79                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
80                 return CMD_SUCCESS;
81         }
82         else
83         {
84                 /*
85                  * Don't check Q:Lines if it's a server-enforced change, just on the off-chance some fucking *moron*
86                  * tries to Q:Line SIDs, also, this means we just get our way period, as it really should be.
87                  * Thanks Kein for finding this. -- w00t
88                  *
89                  * Also don't check Q:Lines for remote nickchanges, they should have our Q:Lines anyway to enforce themselves.
90                  *              -- w00t
91                  */
92                 if (!allowinvalid || !IS_LOCAL(user))
93                 {
94                         XLine* mq = ServerInstance->XLines->MatchesLine("Q",parameters[0]);
95                         if (mq)
96                         {
97                                 ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0].c_str(), user->nick.c_str(), user->ident.c_str(), user->host, mq->reason);
98                                 user->WriteNumeric(432, "%s %s :Invalid nickname: %s",user->nick.c_str(), parameters[0].c_str(), mq->reason);
99                                 return CMD_FAILURE;
100                         }
101                 }
102
103                 /*
104                  * Uh oh.. if the nickname is in use, and it's not in use by the person using it (doh) --
105                  * then we have a potential collide. Check whether someone else is camping on the nick
106                  * (i.e. connect -> send NICK, don't send USER.) If they are camping, force-change the
107                  * camper to their UID, and allow the incoming nick change.
108                  *
109                  * If the guy using the nick is already using it, tell the incoming nick change to gtfo,
110                  * because the nick is already (rightfully) in use. -- w00t
111                  */
112                 User* InUse = ServerInstance->FindNickOnly(parameters[0]);
113                 if (InUse && (InUse != user))
114                 {
115                         if (InUse->registered != REG_ALL)
116                         {
117                                 /* force the camper to their UUID, and ask them to re-send a NICK. */
118                                 InUse->WriteTo(InUse, "NICK %s", InUse->uuid.c_str());
119                                 InUse->WriteNumeric(433, "%s %s :Nickname overruled.", InUse->nick.c_str(), InUse->nick.c_str());
120                                 InUse->UpdateNickHash(InUse->uuid.c_str());
121                                 InUse->nick.assign(InUse->uuid, 0, NICKMAX - 1);
122                                 InUse->InvalidateCache();
123                                 InUse->registered &= ~REG_NICK;
124                         }
125                         else
126                         {
127                                 /* No camping, tell the incoming user  to stop trying to change nick ;p */
128                                 user->WriteNumeric(433, "%s %s :Nickname is already in use.", user->registered >= REG_NICK ? user->nick.c_str() : "*", parameters[0].c_str());
129                                 return CMD_FAILURE;
130                         }
131                 }
132         }
133
134
135         int MOD_RESULT = 0;
136         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user, parameters[0]));
137         if (MOD_RESULT)
138                 // if a module returns true, the nick change is silently forbidden.
139                 return CMD_FAILURE;
140
141         if (user->registered == REG_ALL)
142                 user->WriteCommon("NICK %s", parameters[0].c_str());
143
144         strlcpy(oldnick, user->nick.c_str(), NICKMAX - 1);
145
146         /* change the nick of the user in the users_hash */
147         user = user->UpdateNickHash(parameters[0].c_str());
148
149         /* actually change the nick within the record */
150         if (!user)
151                 return CMD_FAILURE;
152
153         user->nick.assign(parameters[0], 0, NICKMAX - 1);
154         user->InvalidateCache();
155
156         /* Update display nicks */
157         for (UCListIter v = user->chans.begin(); v != user->chans.end(); v++)
158         {
159                 CUList* ulist = v->first->GetUsers();
160                 CUList::iterator i = ulist->find(user);
161                 if (i != ulist->end())
162                         i->second = user->nick;
163         }
164
165         if (user->registered < REG_NICKUSER)
166         {
167                 user->registered = (user->registered | REG_NICK);
168         }
169         if (user->registered == REG_NICKUSER)
170         {
171                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
172                 MOD_RESULT = 0;
173                 FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
174                 if (MOD_RESULT > 0)
175                         return CMD_FAILURE;
176         }
177         if (user->registered == REG_ALL)
178         {
179                 user->IncreasePenalty(10);
180                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
181         }
182
183         return CMD_SUCCESS;
184
185 }
186
187 CmdResult CommandNick::HandleInternal(const unsigned int id, const std::deque<classbase*>&)
188 {
189         allowinvalid = (id != 0);
190         return CMD_SUCCESS;
191 }
192