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 void cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  25 {
  26         char oldnick[NICKMAX];
  27
  28         if (pcnt < 1)
  29         {
  30                 ServerInstance->Log(DEBUG,"not enough params for handle_nick");
  31                 return;
  32         }
  33         if (!parameters[0])
  34         {
  35                 ServerInstance->Log(DEBUG,"invalid parameter passed to handle_nick");
  36                 return;
  37         }
  38         if (!parameters[0][0])
  39         {
  40                 ServerInstance->Log(DEBUG,"zero length new nick passed to handle_nick");
  41                 return;
  42         }
  43         if (!user)
  44         {
  45                 ServerInstance->Log(DEBUG,"invalid user passed to handle_nick");
  46                 return;
  47         }
  48         if (!user->nick)
  49         {
  50                 ServerInstance->Log(DEBUG,"invalid old nick passed to handle_nick");
  51                 return;
  52         }
  53         if (irc::string(user->nick) == irc::string(parameters[0]))
  54         {
  55                 /* If its exactly the same, even case, dont do anything. */
  56                 if (!strcmp(user->nick,parameters[0]))
  57                         return;
  58                 /* Its a change of case. People insisted that they should be
  59                  * able to do silly things like this even though the RFC says
  60                  * the nick AAA is the same as the nick aaa.
  61                  */
  62                 ServerInstance->Log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  63                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  64                 int MOD_RESULT = 0;
  65                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  66                 if (MOD_RESULT)
  67                         return;
  68                 if (user->registered == REG_ALL)
  69                         user->WriteCommon("NICK %s",parameters[0]);
  70                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  71                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  72                 return;
  73         }
  74         else
  75         {
  76                 if ((*parameters[0] == ':') && (*(parameters[0]+1) != 0))
  77                 {
  78                         parameters[0]++;
  79                 }
  80                 char* mq = ServerInstance->XLines->matches_qline(parameters[0]);
  81                 if (mq)
  82                 {
  83                         ServerInstance->WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,mq);
  84                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0],mq);
  85                         return;
  86                 }
  87                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user))
  88                 {
  89                         user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
  90                         return;
  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;
  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;
 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         /* actually change the nick within the record */
 117         if (!user) return;
 118         if (!user->nick) return;
 119
 120         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 121
 122         ServerInstance->Log(DEBUG,"new nick set: %s",user->nick);
 123
 124         if (user->registered < REG_NICKUSER)
 125         {
 126                 user->registered = (user->registered | REG_NICK);
 127                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 128                 // and unless we're lucky we'll get a duff one later on.
 129                 //user->dns_done = (!lookup_dns(user->nick));
 130                 //if (user->dns_done)
 131                 //      ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 132
 133                 if (ServerInstance->Config->NoUserDns)
 134                 {
 135                         user->dns_done = true;
 136                 }
 137                 else
 138                 {
 139                         user->StartDNSLookup();
 140                         if (user->dns_done)
 141                                 ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 142                 }
 143         }
 144         if (user->registered == REG_NICKUSER)
 145         {
 146                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 147                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 148                 //ConnectUser(user,NULL);
 149         }
 150         if (user->registered == REG_ALL)
 151         {
 152                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 153         }
 154 }