src/cmd_nick.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include "configreader.h"
  18 #include "users.h"
  19 #include "modules.h"
  20 #include "inspircd.h"
  21 #include "xline.h"
  22 #include "commands/cmd_nick.h"
  23
  24
  25
  26 extern "C" command_t* init_command(InspIRCd* Instance)
  27 {
  28         return new cmd_nick(Instance);
  29 }
  30
  31 CmdResult cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  32 {
  33         char oldnick[NICKMAX];
  34
  35         if (!parameters[0][0])
  36         {
  37                 ServerInstance->Log(DEBUG,"zero length new nick passed to handle_nick");
  38                 return CMD_FAILURE;
  39         }
  40         if (!*user->nick)
  41         {
  42                 ServerInstance->Log(DEBUG,"invalid old nick passed to handle_nick");
  43                 return CMD_FAILURE;
  44         }
  45         ServerInstance->Log(DEBUG,"Fall through");
  46         if (irc::string(user->nick) == irc::string(parameters[0]))
  47         {
  48                 /* If its exactly the same, even case, dont do anything. */
  49                 if (!strcmp(user->nick,parameters[0]))
  50                         return CMD_SUCCESS;
  51
  52                 /* Its a change of case. People insisted that they should be
  53                  * able to do silly things like this even though the RFC says
  54                  * the nick AAA is the same as the nick aaa.
  55                  */
  56                 ServerInstance->Log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  57                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  58                 int MOD_RESULT = 0;
  59                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  60                 if (MOD_RESULT)
  61                         return CMD_FAILURE;
  62                 if (user->registered == REG_ALL)
  63                         user->WriteCommon("NICK %s",parameters[0]);
  64                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  65                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  66                 return CMD_SUCCESS;
  67         }
  68         else
  69         {
  70                 QLine* mq = ServerInstance->XLines->matches_qline(parameters[0]);
  71                 if (mq)
  72                 {
  73                         ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0], user->nick, user->ident, user->host, mq->reason);
  74                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
  75                         return CMD_FAILURE;
  76                 }
  77                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user) && (ServerInstance->IsNick(parameters[0])))
  78                 {
  79                         userrec* InUse = ServerInstance->FindNick(parameters[0]);
  80                         if (InUse->registered != REG_ALL)
  81                         {
  82                                 userrec::QuitUser(ServerInstance, InUse, "Nickname overruled");
  83                         }
  84                         else
  85                         {
  86                                 user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
  87                                 return CMD_FAILURE;
  88                         }
  89                 }
  90         }
  91         if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
  92         {
  93                 user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
  94                 return CMD_FAILURE;
  95         }
  96
  97         if (user->registered == REG_ALL)
  98         {
  99                 int MOD_RESULT = 0;
 100                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 101                 if (MOD_RESULT) {
 102                         // if a module returns true, the nick change is silently forbidden.
 103                         return CMD_FAILURE;
 104                 }
 105
 106                 user->WriteCommon("NICK %s",parameters[0]);
 107
 108         }
 109
 110         strlcpy(oldnick, user->nick, NICKMAX - 1);
 111
 112         /* change the nick of the user in the users_hash */
 113         user = user->UpdateNickHash(parameters[0]);
 114         /* actually change the nick within the record */
 115         if (!user) return CMD_FAILURE;
 116         if (!*user->nick) return CMD_FAILURE;
 117
 118         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 119
 120         ServerInstance->Log(DEBUG,"new nick set: %s",user->nick);
 121
 122         if (user->registered < REG_NICKUSER)
 123         {
 124                 user->registered = (user->registered | REG_NICK);
 125                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 126                 // and unless we're lucky we'll get a duff one later on.
 127                 //user->dns_done = (!lookup_dns(user->nick));
 128                 //if (user->dns_done)
 129                 //      ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 130
 131                 if (ServerInstance->Config->NoUserDns)
 132                 {
 133                         user->dns_done = true;
 134                 }
 135                 else
 136                 {
 137                         user->StartDNSLookup();
 138                         if (user->dns_done)
 139                                 ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 140                 }
 141         }
 142         if (user->registered == REG_NICKUSER)
 143         {
 144                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 145                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 146                 //ConnectUser(user,NULL);
 147         }
 148         if (user->registered == REG_ALL)
 149         {
 150                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 151         }
 152
 153         return CMD_SUCCESS;
 154
 155 }
 156