1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include "configreader.h"
\r#include "users.h"
\r#include "modules.h"
\r#include "xline.h"
\r#include "commands/cmd_nick.h"
\r\rextern "C" DllExport command_t* init_command(InspIRCd* Instance)
\r{
\r return new cmd_nick(Instance);
\r}
\r\r/** Handle nick changes from users.
\r * NOTE: If you are used to ircds based on ircd2.8, and are looking
\r * for the client introduction code in here, youre in the wrong place.
\r * You need to look in the spanningtree module for this!
\r */
\rCmdResult cmd_nick::Handle (const char** parameters, int pcnt, userrec *user)
\r{
\r char oldnick[NICKMAX];
\r\r if (!*parameters[0] || !*user->nick)
\r {
\r /* We cant put blanks in the parameters, so for this (extremely rare) issue we just put '*' here. */
\r user->WriteServ("432 %s * :Erroneous Nickname", *user->nick ? user->nick : "*");
\r return CMD_FAILURE;
\r }
\r\r if (irc::string(user->nick) == irc::string(parameters[0]))
\r {
\r /* If its exactly the same, even case, dont do anything. */
\r if (!strcmp(user->nick,parameters[0]))
\r return CMD_SUCCESS;
\r\r /* Its a change of case. People insisted that they should be
\r * able to do silly things like this even though the RFC says
\r * the nick AAA is the same as the nick aaa.
\r */
\r strlcpy(oldnick, user->nick, NICKMAX - 1);
\r int MOD_RESULT = 0;
\r FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
\r if (MOD_RESULT)
\r return CMD_FAILURE;
\r if (user->registered == REG_ALL)
\r user->WriteCommon("NICK %s",parameters[0]);
\r strlcpy(user->nick, parameters[0], NICKMAX - 1);
\r user->InvalidateCache();
\r FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
\r return CMD_SUCCESS;
\r }
\r else
\r {
\r QLine* mq = ServerInstance->XLines->matches_qline(parameters[0]);
\r if (mq)
\r {
\r ServerInstance->SNO->WriteToSnoMask('x', "Q-Lined nickname %s from %s!%s@%s: %s", parameters[0], user->nick, user->ident, user->host, mq->reason);
\r user->WriteServ("432 %s %s :Invalid nickname: %s",user->nick,parameters[0], mq->reason);
\r return CMD_FAILURE;
\r }
\r /* Check for nickname overruled -
\r * This happens when one user has connected and sent only NICK, and is essentially
\r * "camping" upon a nickname. To give the new user connecting a fair chance of having
\r * the nickname too, we force a nickchange on the older user (Simply the one who was
\r * here first, no TS checks need to take place here)
\r */
\r userrec* InUse = ServerInstance->FindNick(parameters[0]);
\r if (InUse && (InUse != user) && (ServerInstance->IsNick(parameters[0])))
\r {
\r if (InUse->registered != REG_ALL)
\r {
\r /* change the nick of the older user to nnn-overruled,
\r * where nnn is their file descriptor. We know this to be unique.
\r * NOTE: We must do this and not quit the user, even though we do
\r * not have UID support yet. This is because if we set this user
\r * as quitting and then introduce the new user before the old one
\r * has quit, then the user hash gets totally buggered.
\r * (Yes, that is a technical term). -- Brain
\r */
\r std::string changeback = ConvToStr(InUse->GetFd()) + "-overruled";
\r InUse->WriteTo(InUse, "NICK %s", changeback.c_str());
\r InUse->WriteServ("433 %s %s :Nickname overruled.", InUse->nick, InUse->nick);
\r InUse->UpdateNickHash(changeback.c_str());
\r strlcpy(InUse->nick, changeback.c_str(), NICKMAX - 1);
\r InUse->InvalidateCache();
\r /* Take away their nickname-sent state forcing them to send a nick again */
\r InUse->registered &= ~REG_NICK;
\r }
\r else
\r {
\r user->WriteServ("433 %s %s :Nickname is already in use.", user->registered >= REG_NICK ? user->nick : "*", parameters[0]);
\r return CMD_FAILURE;
\r }
\r }
\r }
\r if ((!ServerInstance->IsNick(parameters[0])) && (IS_LOCAL(user)))
\r {
\r user->WriteServ("432 %s %s :Erroneous Nickname",user->nick,parameters[0]);
\r return CMD_FAILURE;
\r }
\r\r if (user->registered == REG_ALL)
\r {
\r int MOD_RESULT = 0;
\r FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,parameters[0]));
\r if (MOD_RESULT) {
\r // if a module returns true, the nick change is silently forbidden.
\r return CMD_FAILURE;
\r }
\r\r user->WriteCommon("NICK %s",parameters[0]);
\r\r }
\r\r strlcpy(oldnick, user->nick, NICKMAX - 1);
\r\r /* change the nick of the user in the users_hash */
\r user = user->UpdateNickHash(parameters[0]);
\r\r /* actually change the nick within the record */
\r if (!user) return CMD_FAILURE;
\r if (!*user->nick) return CMD_FAILURE;
\r\r strlcpy(user->nick, parameters[0], NICKMAX - 1);
\r\r user->InvalidateCache();
\r\r /* Update display nicks */
\r for (UCListIter v = user->chans.begin(); v != user->chans.end(); v++)
\r {
\r CUList* ulist = v->first->GetUsers();
\r CUList::iterator i = ulist->find(user);
\r if (i != ulist->end())
\r i->second = user->nick;
\r }
\r\r if (user->registered < REG_NICKUSER)
\r {
\r user->registered = (user->registered | REG_NICK);
\r\r if (ServerInstance->Config->NoUserDns)
\r {
\r user->dns_done = true;
\r ServerInstance->next_call = ServerInstance->Time();
\r }
\r else
\r {
\r user->StartDNSLookup();
\r if (user->dns_done)
\r {
\r /* Cached result or instant failure - fall right through if possible */
\r ServerInstance->next_call = ServerInstance->Time();
\r }
\r else
\r {
\r if (ServerInstance->next_call > ServerInstance->Time() + ServerInstance->Config->dns_timeout)
\r ServerInstance->next_call = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
\r }
\r }
\r }
\r if (user->registered == REG_NICKUSER)
\r {
\r /* user is registered now, bit 0 = USER command, bit 1 = sent a NICK command */
\r int MOD_RESULT = 0;
\r FOREACH_RESULT(I_OnUserRegister,OnUserRegister(user));
\r if (MOD_RESULT > 0)
\r return CMD_FAILURE;
\r }
\r if (user->registered == REG_ALL)
\r {
\r FOREACH_MOD(I_OnUserPostNick,OnUserPostNick(user,oldnick));
\r }
\r\r return CMD_SUCCESS;
\r\r}
\r\r
projects / user / henk / code / inspircd.git / blob