src/modules/m_jumpserver.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2007-2008 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 #include "modules/ssl.h"
  24
  25 /** Handle /JUMPSERVER
  26  */
  27 class CommandJumpserver : public Command
  28 {
  29  public:
  30         bool redirect_new_users;
  31         std::string redirect_to;
  32         std::string reason;
  33         int port;
  34         int sslport;
  35
  36         CommandJumpserver(Module* Creator) : Command(Creator, "JUMPSERVER", 0, 4)
  37         {
  38                 flags_needed = 'o';
  39                 syntax = "[<server> <port>[:<sslport>] <+/-an> <reason>]";
  40                 port = 0;
  41                 sslport = 0;
  42                 redirect_new_users = false;
  43         }
  44
  45         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  46         {
  47                 int n_done = 0;
  48                 reason = (parameters.size() < 4) ? "Please use this server/port instead" : parameters[3];
  49                 bool redirect_all_immediately = false;
  50                 redirect_new_users = true;
  51                 bool direction = true;
  52                 std::string n_done_s;
  53
  54                 /* No parameters: jumpserver disabled */
  55                 if (!parameters.size())
  56                 {
  57                         if (port)
  58                                 user->WriteNotice("*** Disabled jumpserver (previously set to '" + redirect_to + ":" + ConvToStr(port) + "')");
  59                         else
  60                                 user->WriteNotice("*** Jumpserver was not enabled.");
  61
  62                         port = 0;
  63                         sslport = 0;
  64                         redirect_to.clear();
  65                         return CMD_SUCCESS;
  66                 }
  67
  68                 port = 0;
  69                 redirect_to.clear();
  70
  71                 if (parameters.size() >= 3)
  72                 {
  73                         for (std::string::const_iterator n = parameters[2].begin(); n != parameters[2].end(); ++n)
  74                         {
  75                                 switch (*n)
  76                                 {
  77                                         case '+':
  78                                                 direction = true;
  79                                         break;
  80                                         case '-':
  81                                                 direction = false;
  82                                         break;
  83                                         case 'a':
  84                                                 redirect_all_immediately = direction;
  85                                         break;
  86                                         case 'n':
  87                                                 redirect_new_users = direction;
  88                                         break;
  89                                         default:
  90                                                 user->WriteNotice("*** Invalid JUMPSERVER flag: " + ConvToStr(*n));
  91                                                 return CMD_FAILURE;
  92                                         break;
  93                                 }
  94                         }
  95
  96                         size_t delimpos = parameters[1].find(':');
  97                         port = ConvToInt(parameters[1].substr(0, delimpos ? delimpos : std::string::npos));
  98                         sslport = (delimpos == std::string::npos ? 0 : ConvToInt(parameters[1].substr(delimpos + 1)));
  99
 100                         if (parameters[1].find_first_not_of("0123456789:") != std::string::npos
 101                                 || parameters[1].rfind(':') != delimpos
 102                                 || port > 65535 || sslport > 65535)
 103                         {
 104                                 user->WriteNotice("*** Invalid port number");
 105                                 return CMD_FAILURE;
 106                         }
 107
 108                         if (redirect_all_immediately)
 109                         {
 110                                 /* Redirect everyone but the oper sending the command */
 111                                 const UserManager::LocalList& list = ServerInstance->Users.GetLocalUsers();
 112                                 for (UserManager::LocalList::const_iterator i = list.begin(); i != list.end(); )
 113                                 {
 114                                         // Quitting the user removes it from the list
 115                                         LocalUser* t = *i;
 116                                         ++i;
 117                                         if (!t->IsOper())
 118                                         {
 119                                                 t->WriteNumeric(RPL_REDIR, "%s %d :Please use this Server/Port instead", parameters[0].c_str(), GetPort(t));
 120                                                 ServerInstance->Users->QuitUser(t, reason);
 121                                                 n_done++;
 122                                         }
 123                                 }
 124                                 if (n_done)
 125                                 {
 126                                         n_done_s = ConvToStr(n_done);
 127                                 }
 128                         }
 129
 130                         if (redirect_new_users)
 131                                 redirect_to = parameters[0];
 132
 133                         user->WriteNotice("*** Set jumpserver to server '" + parameters[0] + "' port '" + (port ? ConvToStr(port) : "Auto") + ", SSL " + (sslport ? ConvToStr(sslport) : "Auto") + "', flags '+" +
 134                                 (redirect_all_immediately ? "a" : "") + (redirect_new_users ? "n'" : "'") +
 135                                 (n_done ? " (" + n_done_s + "user(s) redirected): " : ": ") + reason);
 136                 }
 137
 138                 return CMD_SUCCESS;
 139         }
 140
 141         int GetPort(LocalUser* user)
 142         {
 143                 int p = (SSLClientCert::GetCertificate(&user->eh) ? sslport : port);
 144                 if (p == 0)
 145                         p = user->GetServerPort();
 146                 return p;
 147         }
 148 };
 149
 150 class ModuleJumpServer : public Module
 151 {
 152         CommandJumpserver js;
 153  public:
 154         ModuleJumpServer() : js(this)
 155         {
 156         }
 157
 158         ModResult OnUserRegister(LocalUser* user) CXX11_OVERRIDE
 159         {
 160                 if (js.redirect_new_users)
 161                 {
 162                         int port = js.GetPort(user);
 163                         user->WriteNumeric(RPL_REDIR, "%s %d :Please use this Server/Port instead",
 164                                 js.redirect_to.c_str(), port);
 165                         ServerInstance->Users->QuitUser(user, js.reason);
 166                         return MOD_RES_PASSTHRU;
 167                 }
 168                 return MOD_RES_PASSTHRU;
 169         }
 170
 171         void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE
 172         {
 173                 // Emergency way to unlock
 174                 if (!status.srcuser)
 175                         js.redirect_new_users = false;
 176         }
 177
 178         Version GetVersion() CXX11_OVERRIDE
 179         {
 180                 return Version("Provides support for the RPL_REDIR numeric and the /JUMPSERVER command.", VF_VENDOR);
 181         }
 182 };
 183
 184 MODULE_INIT(ModuleJumpServer)