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 #include "helperfuncs.h"
  28 #include "hashcomp.h"
  29 #include "commands/cmd_nick.h"
  30
  31 void cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
  32 {
  33         char oldnick[NICKMAX];
  34
  35         if (pcnt < 1)
  36         {
  37                 log(DEBUG,"not enough params for handle_nick");
  38                 return;
  39         }
  40         if (!parameters[0])
  41         {
  42                 log(DEBUG,"invalid parameter passed to handle_nick");
  43                 return;
  44         }
  45         if (!parameters[0][0])
  46         {
  47                 log(DEBUG,"zero length new nick passed to handle_nick");
  48                 return;
  49         }
  50         if (!user)
  51         {
  52                 log(DEBUG,"invalid user passed to handle_nick");
  53                 return;
  54         }
  55         if (!user->nick)
  56         {
  57                 log(DEBUG,"invalid old nick passed to handle_nick");
  58                 return;
  59         }
  60         if (irc::string(user->nick) == irc::string(parameters[0]))
  61         {
  62                 /* If its exactly the same, even case, dont do anything. */
  63                 if (!strcmp(user->nick,parameters[0]))
  64                         return;
  65                 /* Its a change of case. People insisted that they should be
  66                  * able to do silly things like this even though the RFC says
  67                  * the nick AAA is the same as the nick aaa.
  68                  */
  69                 log(DEBUG,"old nick is new nick, not updating hash (case change only)");
  70                 strlcpy(oldnick, user->nick, NICKMAX - 1);
  71                 int MOD_RESULT = 0;
  72                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
  73                 if (MOD_RESULT)
  74                         return;
  75                 if (user->registered == REG_ALL)
  76                         user->WriteCommon("NICK %s",parameters[0]);
  77                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
  78                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
  79                 return;
  80         }
  81         else
  82         {
  83                 if ((*parameters[0] == ':') && (*(parameters[0]+1) != 0))
  84                 {
  85                         parameters[0]++;
  86                 }
  87                 if (matches_qline(parameters[0]))
  88                 {
  89                         ServerInstance->WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,matches_qline(parameters[0]));
  90                         user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0],matches_qline(parameters[0]));
  91                         return;
  92                 }
  93                 if ((ServerInstance->FindNick(parameters[0])) && (ServerInstance->FindNick(parameters[0]) != user))
  94                 {
  95                         user->WriteServ("433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
  96                         return;
  97                 }
  98         }
  99         if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
 100         {
 101                 user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
 102                 return;
 103         }
 104
 105         if (user->registered == REG_ALL)
 106         {
 107                 int MOD_RESULT = 0;
 108                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 109                 if (MOD_RESULT) {
 110                         // if a module returns true, the nick change is silently forbidden.
 111                         return;
 112                 }
 113
 114                 user->WriteCommon("NICK %s",parameters[0]);
 115
 116         }
 117
 118         strlcpy(oldnick, user->nick, NICKMAX - 1);
 119
 120         /* change the nick of the user in the users_hash */
 121         user = user->UpdateNickHash(parameters[0]);
 122         /* actually change the nick within the record */
 123         if (!user) return;
 124         if (!user->nick) return;
 125
 126         strlcpy(user->nick, parameters[0], NICKMAX - 1);
 127
 128         log(DEBUG,"new nick set: %s",user->nick);
 129
 130         if (user->registered < REG_NICKUSER)
 131         {
 132                 user->registered = (user->registered | REG_NICK);
 133                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 134                 // and unless we're lucky we'll get a duff one later on.
 135                 //user->dns_done = (!lookup_dns(user->nick));
 136                 //if (user->dns_done)
 137                 //      log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 138
 139                 if (ServerInstance->Config->NoUserDns)
 140                 {
 141                         user->dns_done = true;
 142                 }
 143                 else
 144                 {
 145                         user->StartDNSLookup();
 146                         if (user->dns_done)
 147                                 log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 148                 }
 149         }
 150         if (user->registered == REG_NICKUSER)
 151         {
 152                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 153                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 154                 //ConnectUser(user,NULL);
 155         }
 156         if (user->registered == REG_ALL)
 157         {
 158                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 159         }
 160 }