src/cmd_nick.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 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 "configreader.h"
  15 #include "users.h"
  16 #include "modules.h"
  17 #include "inspircd.h"
  18 #include "xline.h"
  19 #include "commands/cmd_nick.h"
  20
  21
  22
  23 extern "C" command_t* init_command(InspIRCd* Instance)
  24 {
  25         return new cmd_nick(Instance);
  26 }
  27
  28 CmdResult cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  29 {
  30         char oldnick[NICKMAX];
  31
  32         if (!*parameters[0])
  33                 return CMD_FAILURE;
  34
  35         if (!*user->nick)
  36                 return CMD_FAILURE;
  37
  38         if (irc::string(user->nick) == irc::string(parameters[0]))
  39         {
  40                 /* If its exactly the same, even case, dont do anything. */
  41                 if (!strcmp(user->nick,parameters[0]))
  42                         return CMD_SUCCESS;
  43
  44                 /* Its a change of case. People insisted that they should be
  45                  * able to do silly things like this even though the RFC says
  46                  * the nick AAA is the same as the nick aaa.
  47                  */
  48                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  49                 int MOD_RESULT = 0;
  50                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  51                 if (MOD_RESULT)
  52                         return CMD_FAILURE;
  53                 if (user->registered == REG_ALL)
  54                         user->WriteCommon("NICK %s",parameters[0]);
  55                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  56                 user->InvalidateCache();
  57                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  58                 return CMD_SUCCESS;
  59         }
  60         else
  61         {
  62                 QLine* mq = ServerInstance->XLines->matches_qline(parameters[0]);
  63                 if (mq)
  64                 {
  65                         ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0], user->nick, user->ident, user->host, mq->reason);
  66                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
  67                         return CMD_FAILURE;
  68                 }
  69                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user) && (ServerInstance->IsNick(parameters[0])))
  70                 {
  71                         userrec* InUse = ServerInstance->FindNick(parameters[0]);
  72                         if (InUse->registered != REG_ALL)
  73                         {
  74                                 /* change the nick of the older user to nnn-overruled,
  75                                  * where nnn is their file descriptor. We know this to be unique.
  76                                  */
  77                                 std::string changeback = ConvToStr(InUse->GetFd()) + "-overruled";
  78                                 InUse->WriteTo(InUse, "NICK %s", changeback.c_str());
  79                                 InUse->WriteServ("433 %s %s :Nickname overruled.", InUse->nick, InUse->nick);
  80                                 InUse->UpdateNickHash(changeback.c_str());
  81                                 strlcpy(InUse->nick, changeback.c_str(), NICKMAX - 1);
  82                                 InUse->InvalidateCache();
  83                                 /* Take away their nickname-sent state forcing them to send a nick again */
  84                                 InUse->registered &= ~REG_NICK;
  85                         }
  86                         else
  87                         {
  88                                 user->WriteServ("433 %s %s :Nickname is already in use.", user->registered >= REG_NICK ? user->nick : "*", parameters[0]);
  89                                 return CMD_FAILURE;
  90                         }
  91                 }
  92         }
  93         if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
  94         {
  95                 user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
  96                 return CMD_FAILURE;
  97         }
  98
  99         if (user->registered == REG_ALL)
 100         {
 101                 int MOD_RESULT = 0;
 102                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 103                 if (MOD_RESULT) {
 104                         // if a module returns true, the nick change is silently forbidden.
 105                         return CMD_FAILURE;
 106                 }
 107
 108                 user->WriteCommon("NICK %s",parameters[0]);
 109
 110         }
 111
 112         strlcpy(oldnick, user->nick, NICKMAX - 1);
 113
 114         /* change the nick of the user in the users_hash */
 115         user = user->UpdateNickHash(parameters[0]);
 116
 117         /* actually change the nick within the record */
 118         if (!user) return CMD_FAILURE;
 119         if (!*user->nick) return CMD_FAILURE;
 120
 121         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 122
 123         user->InvalidateCache();
 124
 125         if (user->registered < REG_NICKUSER)
 126         {
 127                 user->registered = (user->registered | REG_NICK);
 128
 129                 if (ServerInstance->Config->NoUserDns)
 130                 {
 131                         user->dns_done = true;
 132                         ServerInstance->next_call = ServerInstance->Time();
 133                 }
 134                 else
 135                 {
 136                         user->StartDNSLookup();
 137                         if (user->dns_done)
 138                         {
 139                                 /* Cached result or instant failure - fall right through if possible */
 140                                 ServerInstance->next_call = ServerInstance->Time();
 141                         }
 142                         else
 143                         {
 144                                 if (ServerInstance->next_call > ServerInstance->Time() + ServerInstance->Config->dns_timeout)
 145                                         ServerInstance->next_call = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
 146                         }
 147                 }
 148         }
 149         if (user->registered == REG_NICKUSER)
 150         {
 151                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 152                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 153                 //ConnectUser(user,NULL);
 154         }
 155         if (user->registered == REG_ALL)
 156         {
 157                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 158         }
 159
 160         return CMD_SUCCESS;
 161
 162 }
 163