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 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include "inspircd.h"
  21 #include "inspircd_io.h"
  22 #include <time.h>
  23 #include <string>
  24 #ifdef GCC3
  25 #include <ext/hash_map>
  26 #else
  27 #include <hash_map>
  28 #endif
  29 #include <map>
  30 #include <sstream>
  31 #include <vector>
  32 #include <deque>
  33 #include "users.h"
  34 #include "ctables.h"
  35 #include "globals.h"
  36 #include "modules.h"
  37 #include "dynamic.h"
  38 #include "wildcard.h"
  39 #include "message.h"
  40 #include "commands.h"
  41 #include "mode.h"
  42 #include "xline.h"
  43 #include "inspstring.h"
  44 #include "dnsqueue.h"
  45 #include "dns.h"
  46 #include "helperfuncs.h"
  47 #include "hashcomp.h"
  48 #include "socketengine.h"
  49 #include "typedefs.h"
  50 #include "command_parse.h"
  51 #include "cmd_nick.h"
  52
  53 extern ServerConfig* Config;
  54 extern InspIRCd* ServerInstance;
  55 extern int MODCOUNT;
  56 extern std::vector<Module*> modules;
  57 extern std::vector<ircd_module*> factory;
  58 extern time_t TIME;
  59 extern user_hash clientlist;
  60 extern chan_hash chanlist;
  61 extern whowas_hash whowas;
  62 extern std::vector<userrec*> all_opers;
  63 extern std::vector<userrec*> local_users;
  64 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  65
  66 void cmd_nick::Handle (char **parameters, int pcnt, userrec *user)
  67 {
  68         char oldnick[NICKMAX];
  69
  70         if (pcnt < 1)
  71         {
  72                 log(DEBUG,"not enough params for handle_nick");
  73                 return;
  74         }
  75         if (!parameters[0])
  76         {
  77                 log(DEBUG,"invalid parameter passed to handle_nick");
  78                 return;
  79         }
  80         if (!parameters[0][0])
  81         {
  82                 log(DEBUG,"zero length new nick passed to handle_nick");
  83                 return;
  84         }
  85         if (!user)
  86         {
  87                 log(DEBUG,"invalid user passed to handle_nick");
  88                 return;
  89         }
  90         if (!user->nick)
  91         {
  92                 log(DEBUG,"invalid old nick passed to handle_nick");
  93                 return;
  94         }
  95         if (irc::string(user->nick) == irc::string(parameters[0]))
  96         {
  97                 /* If its exactly the same, even case, dont do anything. */
  98                 if (!strcmp(user->nick,parameters[0]))
  99                         return;
 100                 /* Its a change of case. People insisted that they should be
 101                  * able to do silly things like this even though the RFC says
 102                  * the nick AAA is the same as the nick aaa.
 103                  */
 104                 log(DEBUG,"old nick is new nick, not updating hash (case change only)");
 105                 strlcpy(oldnick, user->nick, NICKMAX - 1);
 106                 int MOD_RESULT = 0;
 107                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 108                 if (MOD_RESULT)
 109                         return;
 110                 if (user->registered == 7)
 111                         WriteCommon(user,"NICK %s",parameters[0]);
 112                 strlcpy(user->nick, parameters[0], NICKMAX - 1);
 113                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 114                 return;
 115         }
 116         else
 117         {
 118                 if (strlen(parameters[0]) > 1)
 119                 {
 120                         if (parameters[0][0] == ':')
 121                         {
 122                                 *parameters[0]++;
 123                         }
 124                 }
 125                 if (matches_qline(parameters[0]))
 126                 {
 127                         WriteOpers("*** Q-Lined nickname %s from %s!%s@%s: %s",parameters[0],user->nick,user->ident,user->host,matches_qline(parameters[0]));
 128                         WriteServ(user->fd,"432 %s %s :Invalid nickname: %s",user->nick,parameters[0],matches_qline(parameters[0]));
 129                         return;
 130                 }
 131                 if ((Find(parameters[0])) && (Find(parameters[0]) != user))
 132                 {
 133                         WriteServ(user->fd,"433 %s %s :Nickname is already in use.",user->nick,parameters[0]);
 134                         return;
 135                 }
 136         }
 137         if (isnick(parameters[0]) == 0)
 138         {
 139                 WriteServ(user->fd,"432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
 140                 return;
 141         }
 142
 143         if (user->registered == 7)
 144         {
 145                 int MOD_RESULT = 0;
 146                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
 147                 if (MOD_RESULT) {
 148                         // if a module returns true, the nick change is silently forbidden.
 149                         return;
 150                 }
 151
 152                 WriteCommon(user,"NICK %s",parameters[0]);
 153
 154         }
 155
 156         strlcpy(oldnick,user->nick,NICKMAX);
 157
 158         /* change the nick of the user in the users_hash */
 159         user = ReHashNick(user->nick, parameters[0]);
 160         /* actually change the nick within the record */
 161         if (!user) return;
 162         if (!user->nick) return;
 163
 164         strlcpy(user->nick, parameters[0],NICKMAX);
 165
 166         log(DEBUG,"new nick set: %s",user->nick);
 167
 168         if (user->registered < 3)
 169         {
 170                 user->registered = (user->registered | 2);
 171                 // dont attempt to look up the dns until they pick a nick... because otherwise their pointer WILL change
 172                 // and unless we're lucky we'll get a duff one later on.
 173                 //user->dns_done = (!lookup_dns(user->nick));
 174                 //if (user->dns_done)
 175                 //      log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 176
 177 #ifdef THREADED_DNS
 178                 // initialize their dns lookup thread
 179                 if (pthread_create(&user->dnsthread, NULL, dns_task, (void *)user) != 0)
 180                 {
 181                         log(DEBUG,"Failed to create DNS lookup thread for user %s",user->nick);
 182                 }
 183 #else
 184                 user->dns_done = (!lookup_dns(user->nick));
 185                 if (user->dns_done)
 186                         log(DEBUG,"Aborting dns lookup of %s because dns server experienced a failure.",user->nick);
 187 #endif
 188
 189         }
 190         if (user->registered == 3)
 191         {
 192                 /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
 193                 FOREACH_MOD(I_OnUserRegister,OnUserRegister(user));
 194                 //ConnectUser(user,NULL);
 195         }
 196         if (user->registered == 7)
 197         {
 198                 FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
 199         }
 200 }
 201