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