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][0])
  33         {
  34                 ServerInstance->Log(DEBUG,"zero length new nick passed to handle_nick");
  35                 return CMD_FAILURE;
  36         }
  37         if (!*user->nick)
  38         {
  39                 ServerInstance->Log(DEBUG,"invalid old nick passed to handle_nick");
  40                 return CMD_FAILURE;
  41         }
  42         ServerInstance->Log(DEBUG,"Fall through");
  43         if (irc::string(user->nick) == irc::string(parameters[0]))
  44         {
  45                 /* If its exactly the same, even case, dont do anything. */
  46                 if (!strcmp(user->nick,parameters[0]))
  47                         return CMD_SUCCESS;
  48
  49                 /* Its a change of case. People insisted that they should be
  50                  * able to do silly things like this even though the RFC says
  51                  * the nick AAA is the same as the nick aaa.
  52                  */
  53                 ServerInstance->Log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  54                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  55                 int MOD_RESULT = 0;
  56                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  57                 if (MOD_RESULT)
  58                         return CMD_FAILURE;
  59                 user->InvalidateCache();
  60                 if (user->registered == REG_ALL)
  61                         user->WriteCommon("NICK %s",parameters[0]);
  62                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  63                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  64                 return CMD_SUCCESS;
  65         }
  66         else
  67         {
  68                 QLine* mq = ServerInstance->XLines->matches_qline(parameters[0]);
  69                 if (mq)
  70                 {
  71                         ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0], user->nick, user->ident, user->host, mq->reason);
  72                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
  73                         return CMD_FAILURE;
  74                 }
  75                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user) && (ServerInstance->IsNick(parameters[0])))
  76                 {
  77                         userrec* InUse = ServerInstance->FindNick(parameters[0]);
  78                         if (InUse->registered != REG_ALL)
  79                         {
  80                                 userrec::QuitUser(ServerInstance, InUse, "Nickname overruled");
  81                         }
  82                         else
  83                         {
  84                                 user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
  85                                 return CMD_FAILURE;
  86                         }
  87                 }
  88         }
  89         if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
  90         {
  91                 user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
  92                 return CMD_FAILURE;
  93         }
  94
  95         if (user->registered == REG_ALL)
  96         {
  97                 int MOD_RESULT = 0;
  98                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  99                 if (MOD_RESULT) {
 100                         // if a module returns true, the nick change is silently forbidden.
 101                         return CMD_FAILURE;
 102                 }
 103
 104                 user->WriteCommon("NICK %s",parameters[0]);
 105
 106         }
 107
 108         strlcpy(oldnick, user->nick, NICKMAX - 1);
 109
 110         /* change the nick of the user in the users_hash */
 111         user = user->UpdateNickHash(parameters[0]);
 112
 113         /* actually change the nick within the record */
 114         if (!user) return CMD_FAILURE;
 115         if (!*user->nick) return CMD_FAILURE;
 116
 117         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 118
 119         user->InvalidateCache();
 120
 121         ServerInstance->Log(DEBUG,"new nick set: %s",user->nick);
 122
 123         if (user->registered < REG_NICKUSER)
 124         {
 125                 user->registered = (user->registered | REG_NICK);
 126                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 127                 // and unless we're lucky we'll get a duff one later on.
 128                 //user->dns_done = (!lookup_dns(user->nick));
 129                 //if (user->dns_done)
 130                 //      ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 131
 132                 if (ServerInstance->Config->NoUserDns)
 133                 {
 134                         user->dns_done = true;
 135                         ServerInstance->next_call = ServerInstance->Time();
 136                 }
 137                 else
 138                 {
 139                         user->StartDNSLookup();
 140                         if (user->dns_done)
 141                         {
 142                                 /* Cached result or instant failure - fall right through if possible */
 143                                 ServerInstance->next_call = ServerInstance->Time();
 144                         }
 145                         else
 146                         {
 147                                 if (ServerInstance->next_call > ServerInstance->Time() + ServerInstance->Config->dns_timeout)
 148                                         ServerInstance->next_call = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
 149                         }
 150                 }
 151         }
 152         if (user->registered == REG_NICKUSER)
 153         {
 154                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 155                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 156                 //ConnectUser(user,NULL);
 157         }
 158         if (user->registered == REG_ALL)
 159         {
 160                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 161         }
 162
 163         return CMD_SUCCESS;
 164
 165 }
 166