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 <string>
  18 #include <vector>
  19 #include "inspircd_config.h"
  20 #include "configreader.h"
  21 #include "hash_map.h"
  22 #include "users.h"
  23 #include "modules.h"
  24 #include "commands.h"
  25 #include "xline.h"
  26 #include "dns.h"
  27
  28 #include "inspircd.h"
  29 #include "hashcomp.h"
  30 #include "commands/cmd_nick.h"
  31
  32 void cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  33 {
  34         char oldnick[NICKMAX];
  35
  36         if (pcnt < 1)
  37         {
  38                 ServerInstance->Log(DEBUG,"not enough params for handle_nick");
  39                 return;
  40         }
  41         if (!parameters[0])
  42         {
  43                 ServerInstance->Log(DEBUG,"invalid parameter passed to handle_nick");
  44                 return;
  45         }
  46         if (!parameters[0][0])
  47         {
  48                 ServerInstance->Log(DEBUG,"zero length new nick passed to handle_nick");
  49                 return;
  50         }
  51         if (!user)
  52         {
  53                 ServerInstance->Log(DEBUG,"invalid user passed to handle_nick");
  54                 return;
  55         }
  56         if (!user->nick)
  57         {
  58                 ServerInstance->Log(DEBUG,"invalid old nick passed to handle_nick");
  59                 return;
  60         }
  61         if (irc::string(user->nick) == irc::string(parameters[0]))
  62         {
  63                 /* If its exactly the same, even case, dont do anything. */
  64                 if (!strcmp(user->nick,parameters[0]))
  65                         return;
  66                 /* Its a change of case. People insisted that they should be
  67                  * able to do silly things like this even though the RFC says
  68                  * the nick AAA is the same as the nick aaa.
  69                  */
  70                 ServerInstance->Log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  71                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  72                 int MOD_RESULT = 0;
  73                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  74                 if (MOD_RESULT)
  75                         return;
  76                 if (user->registered == REG_ALL)
  77                         user->WriteCommon("NICK %s",parameters[0]);
  78                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  79                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  80                 return;
  81         }
  82         else
  83         {
  84                 if ((*parameters[0] == ':') && (*(parameters[0]+1) != 0))
  85                 {
  86                         parameters[0]++;
  87                 }
  88                 char* mq = ServerInstance->XLines->matches_qline(parameters[0]);
  89                 if (mq)
  90                 {
  91                         ServerInstance->WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,mq);
  92                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0],mq);
  93                         return;
  94                 }
  95                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user))
  96                 {
  97                         user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
  98                         return;
  99                 }
 100         }
 101         if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
 102         {
 103                 user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
 104                 return;
 105         }
 106
 107         if (user->registered == REG_ALL)
 108         {
 109                 int MOD_RESULT = 0;
 110                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 111                 if (MOD_RESULT) {
 112                         // if a module returns true, the nick change is silently forbidden.
 113                         return;
 114                 }
 115
 116                 user->WriteCommon("NICK %s",parameters[0]);
 117
 118         }
 119
 120         strlcpy(oldnick, user->nick, NICKMAX - 1);
 121
 122         /* change the nick of the user in the users_hash */
 123         user = user->UpdateNickHash(parameters[0]);
 124         /* actually change the nick within the record */
 125         if (!user) return;
 126         if (!user->nick) return;
 127
 128         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 129
 130         ServerInstance->Log(DEBUG,"new nick set: %s",user->nick);
 131
 132         if (user->registered < REG_NICKUSER)
 133         {
 134                 user->registered = (user->registered | REG_NICK);
 135                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 136                 // and unless we're lucky we'll get a duff one later on.
 137                 //user->dns_done = (!lookup_dns(user->nick));
 138                 //if (user->dns_done)
 139                 //      ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 140
 141                 if (ServerInstance->Config->NoUserDns)
 142                 {
 143                         user->dns_done = true;
 144                 }
 145                 else
 146                 {
 147                         user->StartDNSLookup();
 148                         if (user->dns_done)
 149                                 ServerInstance->Log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 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 }