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1 /*
2  * InspIRCd -- Internet Relay Chat Daemon
3  *
4  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
5  *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
6  *   Copyright (C) 2004-2006 Craig Edwards <craigedwards@brainbox.cc>
7  *
8  * This file is part of InspIRCd.  InspIRCd is free software: you can
9  * redistribute it and/or modify it under the terms of the GNU General Public
10  * License as published by the Free Software Foundation, version 2.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
14  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
15  * details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
19  */
20
21
22 #include "inspircd.h"
23
24 /* $ModDesc: Provides support for the CHGHOST command */
25
26 /** Handle /CHGHOST
27  */
28 class CommandChghost : public Command
29 {
30  private:
31         char* hostmap;
32  public:
33         CommandChghost(Module* Creator, char* hmap) : Command(Creator,"CHGHOST", 2), hostmap(hmap)
34         {
35                 flags_needed = 'o';
36                 syntax = "<nick> <newhost>";
37                 TRANSLATE3(TR_NICK, TR_TEXT, TR_END);
38         }
39
40         CmdResult Handle(const std::vector<std::string> &parameters, User *user)
41         {
42                 const char* x = parameters[1].c_str();
43
44                 if (parameters[1].length() > 63)
45                 {
46                         user->WriteServ("NOTICE %s :*** CHGHOST: Host too long", user->nick.c_str());
47                         return CMD_FAILURE;
48                 }
49
50                 for (; *x; x++)
51                 {
52                         if (!hostmap[(unsigned char)*x])
53                         {
54                                 user->WriteServ("NOTICE "+std::string(user->nick)+" :*** CHGHOST: Invalid characters in hostname");
55                                 return CMD_FAILURE;
56                         }
57                 }
58
59                 User* dest = ServerInstance->FindNick(parameters[0]);
60
61                 if (!dest)
62                 {
63                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel", user->nick.c_str(), parameters[0].c_str());
64                         return CMD_FAILURE;
65                 }
66
67                 if (IS_LOCAL(dest))
68                 {
69                         if ((dest->ChangeDisplayedHost(parameters[1].c_str())) && (!ServerInstance->ULine(user->server)))
70                         {
71                                 // fix by brain - ulines set hosts silently
72                                 ServerInstance->SNO->WriteGlobalSno('a', std::string(user->nick)+" used CHGHOST to make the displayed host of "+dest->nick+" become "+dest->dhost);
73                         }
74                 }
75
76                 return CMD_SUCCESS;
77         }
78
79         RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
80         {
81                 User* dest = ServerInstance->FindNick(parameters[0]);
82                 if (dest)
83                         return ROUTE_OPT_UCAST(dest->server);
84                 return ROUTE_LOCALONLY;
85         }
86 };
87
88
89 class ModuleChgHost : public Module
90 {
91         CommandChghost cmd;
92         char hostmap[256];
93  public:
94         ModuleChgHost() : cmd(this, hostmap)
95         {
96                 OnRehash(NULL);
97                 ServerInstance->AddCommand(&cmd);
98                 Implementation eventlist[] = { I_OnRehash };
99                 ServerInstance->Modules->Attach(eventlist, this, 1);
100         }
101
102
103         void OnRehash(User* user)
104         {
105                 ConfigReader Conf;
106                 std::string hmap = Conf.ReadValue("hostname", "charmap", 0);
107
108                 if (hmap.empty())
109                         hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-_/0123456789";
110
111                 memset(hostmap, 0, sizeof(hostmap));
112                 for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
113                         hostmap[(unsigned char)*n] = 1;
114         }
115
116         ~ModuleChgHost()
117         {
118         }
119
120         Version GetVersion()
121         {
122                 return Version("Provides support for the CHGHOST command", VF_OPTCOMMON | VF_VENDOR);
123         }
124
125 };
126
127 MODULE_INIT(ModuleChgHost)