src/modules/m_hostchange.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2005-2007 Craig Edwards <craigedwards@brainbox.cc>
   5  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   6  *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
   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 /** Holds information on a host set by m_hostchange
  25  */
  26 class Host
  27 {
  28  public:
  29         enum HostChangeAction
  30         {
  31                 HCA_SET,
  32                 HCA_SUFFIX,
  33                 HCA_ADDNICK
  34         };
  35
  36         HostChangeAction action;
  37         std::string newhost;
  38         std::string ports;
  39
  40         Host(HostChangeAction Action, const std::string& Newhost, const std::string& Ports) :
  41                 action(Action), newhost(Newhost), ports(Ports) {}
  42 };
  43
  44 typedef std::vector<std::pair<std::string, Host> > hostchanges_t;
  45
  46 class ModuleHostChange : public Module
  47 {
  48         hostchanges_t hostchanges;
  49         std::string MySuffix;
  50         std::string MyPrefix;
  51         std::string MySeparator;
  52
  53  public:
  54         void init() CXX11_OVERRIDE
  55         {
  56                 OnRehash(NULL);
  57         }
  58
  59         void OnRehash(User* user) CXX11_OVERRIDE
  60         {
  61                 ConfigTag* host = ServerInstance->Config->ConfValue("host");
  62                 MySuffix = host->getString("suffix");
  63                 MyPrefix = host->getString("prefix");
  64                 MySeparator = host->getString("separator", ".");
  65                 hostchanges.clear();
  66
  67                 std::set<std::string> dupecheck;
  68                 ConfigTagList tags = ServerInstance->Config->ConfTags("hostchange");
  69                 for (ConfigIter i = tags.first; i != tags.second; ++i)
  70                 {
  71                         ConfigTag* tag = i->second;
  72                         std::string mask = tag->getString("mask");
  73                         if (!dupecheck.insert(mask).second)
  74                                 throw ModuleException("Duplicate hostchange entry: " + mask);
  75
  76                         Host::HostChangeAction act;
  77                         std::string newhost;
  78                         std::string action = tag->getString("action");
  79                         if (!strcasecmp(action.c_str(), "set"))
  80                         {
  81                                 act = Host::HCA_SET;
  82                                 newhost = tag->getString("value");
  83                         }
  84                         else if (!strcasecmp(action.c_str(), "suffix"))
  85                                 act = Host::HCA_SUFFIX;
  86                         else if (!strcasecmp(action.c_str(), "addnick"))
  87                                 act = Host::HCA_ADDNICK;
  88                         else
  89                                 throw ModuleException("Invalid hostchange action: " + action);
  90
  91                         hostchanges.push_back(std::make_pair(mask, Host(act, newhost, tag->getString("ports"))));
  92                 }
  93         }
  94
  95         Version GetVersion() CXX11_OVERRIDE
  96         {
  97                 // returns the version number of the module to be
  98                 // listed in /MODULES
  99                 return Version("Provides masking of user hostnames in a different way to m_cloaking", VF_VENDOR);
 100         }
 101
 102         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 103         {
 104                 for (hostchanges_t::iterator i = hostchanges.begin(); i != hostchanges.end(); i++)
 105                 {
 106                         if (((InspIRCd::MatchCIDR(user->MakeHost(), i->first)) || (InspIRCd::MatchCIDR(user->MakeHostIP(), i->first))))
 107                         {
 108                                 const Host& h = i->second;
 109
 110                                 if (!h.ports.empty())
 111                                 {
 112                                         irc::portparser portrange(h.ports, false);
 113                                         long portno = -1;
 114                                         bool foundany = false;
 115
 116                                         while ((portno = portrange.GetToken()))
 117                                                 if (portno == user->GetServerPort())
 118                                                         foundany = true;
 119
 120                                         if (!foundany)
 121                                                 continue;
 122                                 }
 123
 124                                 // host of new user matches a hostchange tag's mask
 125                                 std::string newhost;
 126                                 if (h.action == Host::HCA_SET)
 127                                 {
 128                                         newhost = h.newhost;
 129                                 }
 130                                 else if (h.action == Host::HCA_SUFFIX)
 131                                 {
 132                                         newhost = MySuffix;
 133                                 }
 134                                 else if (h.action == Host::HCA_ADDNICK)
 135                                 {
 136                                         // first take their nick and strip out non-dns, leaving just [A-Z0-9\-]
 137                                         std::string complete;
 138                                         for (std::string::const_iterator j = user->nick.begin(); j != user->nick.end(); ++j)
 139                                         {
 140                                                 if  (((*j >= 'A') && (*j <= 'Z')) ||
 141                                                     ((*j >= 'a') && (*j <= 'z')) ||
 142                                                     ((*j >= '0') && (*j <= '9')) ||
 143                                                     (*j == '-'))
 144                                                 {
 145                                                         complete = complete + *j;
 146                                                 }
 147                                         }
 148                                         if (complete.empty())
 149                                                 complete = "i-have-a-lame-nick";
 150
 151                                         if (!MyPrefix.empty())
 152                                                 newhost = MyPrefix + MySeparator + complete;
 153                                         else
 154                                                 newhost = complete + MySeparator + MySuffix;
 155                                 }
 156                                 if (!newhost.empty())
 157                                 {
 158                                         user->WriteNotice("Setting your virtual host: " + newhost);
 159                                         if (!user->ChangeDisplayedHost(newhost.c_str()))
 160                                                 user->WriteNotice("Could not set your virtual host: " + newhost);
 161                                         return;
 162                                 }
 163                         }
 164                 }
 165         }
 166 };
 167
 168 MODULE_INIT(ModuleHostChange)