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/* |
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* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd) |
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* |
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* Copyright (c) 1997-2014 ircd-hybrid development team |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
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* USA |
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*/ |
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|
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/*! \file m_nick.c |
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* \brief Includes required functions for processing the NICK command. |
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* \version $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "list.h" |
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#include "hash.h" |
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#include "fdlist.h" |
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#include "irc_string.h" |
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#include "ircd.h" |
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#include "numeric.h" |
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#include "conf.h" |
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#include "user.h" |
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#include "whowas.h" |
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#include "send.h" |
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#include "channel_mode.h" |
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#include "resv.h" |
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#include "parse.h" |
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#include "modules.h" |
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#include "packet.h" |
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#include "watch.h" |
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#include "misc.h" |
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|
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|
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/* check_clean_nick() |
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* |
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* input - pointer to source |
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* - |
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* - nickname |
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* - truncated nickname |
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* - origin of client |
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* - pointer to server nick is coming from |
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* output - none |
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* side effects - if nickname is erroneous, or a different length to |
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* truncated nickname, return 1 |
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*/ |
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static int |
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check_clean_nick(struct Client *source_p, char *nick, struct Client *server_p) |
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{ |
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/* |
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* The old code did some wacky stuff here, if the nick is invalid, kill it |
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* and don't bother messing at all |
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*/ |
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if (!valid_nickname(nick, 0)) |
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{ |
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++ServerStats.is_kill; |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"Bad/long Nick: %s From: %s(via %s)", |
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nick, server_p->name, source_p->from->name); |
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|
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sendto_one(source_p, ":%s KILL %s :%s (Bad Nickname)", |
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me.name, nick, me.name); |
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|
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/* Bad nick change */ |
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if (IsClient(source_p) && !MyConnect(source_p)) |
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{ |
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sendto_server(source_p, 0, 0, ":%s KILL %s :%s (Bad Nickname)", |
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me.id, source_p->id, me.name); |
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AddFlag(source_p, FLAGS_KILLED); |
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exit_client(source_p, "Bad Nickname"); |
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} |
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|
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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/* check_clean_user() |
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* |
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* input - pointer to client sending data |
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* - nickname |
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* - username to check |
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* - origin of NICK |
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* output - none |
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* side effects - if username is erroneous, return 1 |
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*/ |
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static int |
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check_clean_user(struct Client *source_p, char *nick, |
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char *user, struct Client *server_p) |
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{ |
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if (!valid_username(user, 0)) |
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{ |
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++ServerStats.is_kill; |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"Bad/Long Username: %s Nickname: %s From: %s(via %s)", |
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user, nick, server_p->name, source_p->from->name); |
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sendto_one(source_p, ":%s KILL %s :%s (Bad Username)", |
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me.name, nick, me.name); |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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/* check_clean_host() |
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* |
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* input - pointer to client sending us data |
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* - nickname |
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* - hostname to check |
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* - source name |
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* output - none |
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* side effects - if hostname is erroneous, return 1 |
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*/ |
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static int |
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check_clean_host(struct Client *source_p, char *nick, |
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char *host, struct Client *server_p) |
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{ |
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if (!valid_hostname(host)) |
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{ |
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++ServerStats.is_kill; |
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sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE, |
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"Bad/Long Hostname: %s Nickname: %s From: %s(via %s)", |
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host, nick, server_p->name, source_p->from->name); |
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sendto_one(source_p, ":%s KILL %s :%s (Bad Hostname)", |
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me.name, nick, me.name); |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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/* set_initial_nick() |
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* |
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* inputs |
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* output |
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* side effects - |
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* |
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* This function is only called to set up an initially registering |
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* client. |
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*/ |
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static void |
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set_initial_nick(struct Client *source_p, const char *nick) |
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{ |
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/* Client setting NICK the first time */ |
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|
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/* This had to be copied here to avoid problems.. */ |
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source_p->tsinfo = CurrentTime; |
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source_p->connection->registration &= ~REG_NEED_NICK; |
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|
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if (source_p->name[0]) |
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hash_del_client(source_p); |
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|
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strlcpy(source_p->name, nick, sizeof(source_p->name)); |
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hash_add_client(source_p); |
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|
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/* fd_desc is long enough */ |
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fd_note(&source_p->connection->fd, "Nick: %s", nick); |
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|
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if (!source_p->connection->registration) |
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register_local_user(source_p); |
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} |
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|
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/* change_local_nick() |
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* |
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* inputs - pointer to server |
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* - pointer to client |
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* - nick |
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* output - |
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* side effects - changes nick of a LOCAL user |
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*/ |
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static void |
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change_local_nick(struct Client *source_p, const char *nick) |
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{ |
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int samenick = 0; |
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|
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assert(source_p->name[0] && !EmptyString(nick)); |
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assert(MyClient(source_p)); |
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|
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/* |
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* Client just changing his/her nick. If he/she is |
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* on a channel, send note of change to all clients |
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* on that channel. Propagate notice to other servers. |
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*/ |
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if ((source_p->connection->nick.last_attempt + |
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ConfigGeneral.max_nick_time) < CurrentTime) |
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source_p->connection->nick.count = 0; |
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|
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if (ConfigGeneral.anti_nick_flood && |
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!HasUMode(source_p, UMODE_OPER) && |
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source_p->connection->nick.count > |
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ConfigGeneral.max_nick_changes) |
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{ |
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sendto_one_numeric(source_p, &me, ERR_NICKTOOFAST, nick, |
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ConfigGeneral.max_nick_time); |
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return; |
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} |
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|
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source_p->connection->nick.last_attempt = CurrentTime; |
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source_p->connection->nick.count++; |
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|
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samenick = !irccmp(source_p->name, nick); |
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|
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if (!samenick) |
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{ |
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source_p->tsinfo = CurrentTime; |
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clear_ban_cache_client(source_p); |
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watch_check_hash(source_p, RPL_LOGOFF); |
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|
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if (HasUMode(source_p, UMODE_REGISTERED)) |
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{ |
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unsigned int oldmodes = source_p->umodes; |
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char modebuf[IRCD_BUFSIZE] = ""; |
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|
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DelUMode(source_p, UMODE_REGISTERED); |
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send_umode(source_p, source_p, oldmodes, modebuf); |
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} |
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} |
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|
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sendto_realops_flags(UMODE_NCHANGE, L_ALL, SEND_NOTICE, |
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"Nick change: From %s to %s [%s@%s]", |
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source_p->name, nick, source_p->username, source_p->host); |
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sendto_common_channels_local(source_p, 1, 0, ":%s!%s@%s NICK :%s", |
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source_p->name, source_p->username, |
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source_p->host, nick); |
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whowas_add_history(source_p, 1); |
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|
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sendto_server(source_p, 0, 0, ":%s NICK %s :%lu", |
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source_p->id, nick, (unsigned long)source_p->tsinfo); |
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|
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hash_del_client(source_p); |
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strlcpy(source_p->name, nick, sizeof(source_p->name)); |
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hash_add_client(source_p); |
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|
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if (!samenick) |
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watch_check_hash(source_p, RPL_LOGON); |
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|
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/* fd_desc is long enough */ |
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fd_note(&source_p->connection->fd, "Nick: %s", nick); |
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} |
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|
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/*! |
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* |
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* \param source_p Pointer to allocated Client struct from which the message |
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* originally comes from. This can be a local or remote client. |
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* \param parc Integer holding the number of supplied arguments. |
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* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
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* \note Valid arguments for this command are: |
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* |
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* - parv[0] = command |
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* - parv[1] = nickname |
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* - parv[2] = timestamp |
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*/ |
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static void |
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change_remote_nick(struct Client *source_p, char *parv[]) |
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{ |
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int samenick = !irccmp(source_p->name, parv[1]); |
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|
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assert(!EmptyString(parv[1])); |
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assert(IsClient(source_p)); |
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assert(source_p->name[0]); |
275 |
|
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/* Client changing their nick */ |
277 |
if (!samenick) |
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{ |
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DelUMode(source_p, UMODE_REGISTERED); |
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watch_check_hash(source_p, RPL_LOGOFF); |
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source_p->tsinfo = atol(parv[2]); |
282 |
assert(source_p->tsinfo > 0); |
283 |
} |
284 |
|
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sendto_common_channels_local(source_p, 1, 0, ":%s!%s@%s NICK :%s", |
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source_p->name, source_p->username, |
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source_p->host, parv[1]); |
288 |
|
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whowas_add_history(source_p, 1); |
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sendto_server(source_p, 0, 0, ":%s NICK %s :%lu", |
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source_p->id, parv[1], (unsigned long)source_p->tsinfo); |
292 |
|
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/* Set the new nick name */ |
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hash_del_client(source_p); |
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strlcpy(source_p->name, parv[1], sizeof(source_p->name)); |
296 |
hash_add_client(source_p); |
297 |
|
298 |
if (!samenick) |
299 |
watch_check_hash(source_p, RPL_LOGON); |
300 |
} |
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|
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/*! |
303 |
* |
304 |
* \param source_p Pointer to allocated Client struct from which the message |
305 |
* originally comes from. This can be a local or remote client. |
306 |
* \param parc Integer holding the number of supplied arguments. |
307 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
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* pointers. |
309 |
* \note Valid arguments for this command are: |
310 |
* |
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* server introducing new nick/UID (without services support) |
312 |
* - parv[0] = command |
313 |
* - parv[1] = nickname |
314 |
* - parv[2] = hop count |
315 |
* - parv[3] = TS |
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* - parv[4] = umode |
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* - parv[5] = username |
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* - parv[6] = hostname |
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* - parv[7] = ip |
320 |
* - parv[8] = uid |
321 |
* - parv[9] = ircname (gecos) |
322 |
* |
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* server introducing new nick/UID (with services support) |
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* - parv[ 0] = command |
325 |
* - parv[ 1] = nickname |
326 |
* - parv[ 2] = hop count |
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* - parv[ 3] = TS |
328 |
* - parv[ 4] = umode |
329 |
* - parv[ 5] = username |
330 |
* - parv[ 6] = hostname |
331 |
* - parv[ 7] = ip |
332 |
* - parv[ 8] = uid |
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* - parv[ 9] = services account |
334 |
* - parv[10] = ircname (gecos) |
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*/ |
336 |
static void |
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uid_from_server(struct Client *source_p, int parc, char *parv[]) |
338 |
{ |
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struct Client *client_p = NULL; |
340 |
|
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client_p = make_client(source_p->from); |
342 |
client_p->servptr = source_p; |
343 |
client_p->hopcount = atoi(parv[2]); |
344 |
client_p->tsinfo = atol(parv[3]); |
345 |
|
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strlcpy(client_p->account, (parc == 11 ? parv[9] : "0"), sizeof(client_p->account)); |
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strlcpy(client_p->name, parv[1], sizeof(client_p->name)); |
348 |
strlcpy(client_p->id, parv[8], sizeof(client_p->id)); |
349 |
strlcpy(client_p->sockhost, parv[7], sizeof(client_p->sockhost)); |
350 |
strlcpy(client_p->info, parv[parc - 1], sizeof(client_p->info)); |
351 |
strlcpy(client_p->host, parv[6], sizeof(client_p->host)); |
352 |
strlcpy(client_p->username, parv[5], sizeof(client_p->username)); |
353 |
|
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hash_add_client(client_p); |
355 |
hash_add_id(client_p); |
356 |
|
357 |
/* Parse usermodes */ |
358 |
for (const char *m = &parv[4][1]; *m; ++m) |
359 |
{ |
360 |
unsigned int flag = user_modes[(unsigned char)*m]; |
361 |
|
362 |
if ((flag & UMODE_INVISIBLE) && !HasUMode(client_p, UMODE_INVISIBLE)) |
363 |
++Count.invisi; |
364 |
if ((flag & UMODE_OPER) && !HasUMode(client_p, UMODE_OPER)) |
365 |
++Count.oper; |
366 |
|
367 |
AddUMode(client_p, flag); |
368 |
} |
369 |
|
370 |
register_remote_user(client_p); |
371 |
} |
372 |
|
373 |
/*! |
374 |
* |
375 |
* \param source_p Pointer to allocated Client struct from which the message |
376 |
* originally comes from. This can be a local or remote client. |
377 |
* \param parc Integer holding the number of supplied arguments. |
378 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
379 |
* pointers. |
380 |
* \note Valid arguments for this command are: |
381 |
* |
382 |
* server introducing new nick/UID (without services support) |
383 |
* - parv[0] = command |
384 |
* - parv[1] = nickname |
385 |
* - parv[2] = hop count |
386 |
* - parv[3] = TS |
387 |
* - parv[4] = umode |
388 |
* - parv[5] = username |
389 |
* - parv[6] = hostname |
390 |
* - parv[7] = ip |
391 |
* - parv[8] = uid |
392 |
* - parv[9] = ircname (gecos) |
393 |
* |
394 |
* server introducing new nick/UID (with services support) |
395 |
* - parv[ 0] = command |
396 |
* - parv[ 1] = nickname |
397 |
* - parv[ 2] = hop count |
398 |
* - parv[ 3] = TS |
399 |
* - parv[ 4] = umode |
400 |
* - parv[ 5] = username |
401 |
* - parv[ 6] = hostname |
402 |
* - parv[ 7] = ip |
403 |
* - parv[ 8] = uid |
404 |
* - parv[ 9] = services id (account name) |
405 |
* - parv[10] = ircname (gecos) |
406 |
*/ |
407 |
static int |
408 |
perform_uid_introduction_collides(struct Client *source_p, struct Client *target_p, |
409 |
int parc, char *parv[]) |
410 |
{ |
411 |
const char *uid = parv[8]; |
412 |
time_t newts = atol(parv[3]); |
413 |
int sameuser = 0; |
414 |
|
415 |
assert(IsServer(source_p)); |
416 |
assert(IsClient(target_p)); |
417 |
|
418 |
/* Server introducing new nick */ |
419 |
|
420 |
/* If we don't have a TS, or their TS's are the same, kill both */ |
421 |
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
422 |
{ |
423 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
424 |
"Nick collision on %s(%s <- %s)(both killed)", |
425 |
target_p->name, target_p->from->name, |
426 |
source_p->from->name); |
427 |
|
428 |
sendto_one(source_p, ":%s KILL %s :%s (Nick collision (new))", |
429 |
me.id, uid, me.name); |
430 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision (new))", |
431 |
me.id, target_p->id, me.name); |
432 |
|
433 |
++ServerStats.is_kill; |
434 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
435 |
|
436 |
AddFlag(target_p, FLAGS_KILLED); |
437 |
exit_client(target_p, "Nick collision (new)"); |
438 |
return 0; |
439 |
} |
440 |
|
441 |
/* The timestamps are different */ |
442 |
if (!strcmp(target_p->sockhost, "0")) /* XXX: TBR */ |
443 |
sameuser = !irccmp(target_p->username, parv[5]) && !irccmp(target_p->host, parv[6]); |
444 |
else |
445 |
sameuser = !irccmp(target_p->username, parv[5]) && !irccmp(target_p->sockhost, parv[7]); |
446 |
|
447 |
/* |
448 |
* If the users are the same (loaded a client on a different server) |
449 |
* and the new users ts is older, or the users are different and the |
450 |
* new users ts is newer, ignore the new client and let it do the kill |
451 |
*/ |
452 |
if ((sameuser && newts < target_p->tsinfo) || |
453 |
(!sameuser && newts > target_p->tsinfo)) |
454 |
{ |
455 |
sendto_one(source_p, ":%s KILL %s :%s (Nick collision (new))", |
456 |
me.id, uid, me.name); |
457 |
return 0; |
458 |
} |
459 |
|
460 |
if (sameuser) |
461 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
462 |
"Nick collision on %s(%s <- %s)(older killed)", |
463 |
target_p->name, target_p->from->name, |
464 |
source_p->from->name); |
465 |
else |
466 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
467 |
"Nick collision on %s(%s <- %s)(newer killed)", |
468 |
target_p->name, target_p->from->name, |
469 |
source_p->from->name); |
470 |
|
471 |
++ServerStats.is_kill; |
472 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
473 |
|
474 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision (new))", |
475 |
me.id, target_p->id, me.name); |
476 |
|
477 |
AddFlag(target_p, FLAGS_KILLED); |
478 |
exit_client(target_p, "Nick collision"); |
479 |
|
480 |
return 1; |
481 |
} |
482 |
|
483 |
/*! |
484 |
* |
485 |
* \param source_p Pointer to allocated Client struct from which the message |
486 |
* originally comes from. This can be a local or remote client. |
487 |
* \param parc Integer holding the number of supplied arguments. |
488 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
489 |
* pointers. |
490 |
* \note Valid arguments for this command are: |
491 |
* |
492 |
* - parv[0] = command |
493 |
* - parv[1] = nickname |
494 |
* - parv[2] = timestamp |
495 |
*/ |
496 |
static int |
497 |
perform_nick_change_collides(struct Client *source_p, struct Client *target_p, |
498 |
int parc, char *parv[]) |
499 |
{ |
500 |
int sameuser = 0; |
501 |
time_t newts = atol(parv[2]); |
502 |
|
503 |
assert(IsClient(source_p)); |
504 |
assert(IsClient(target_p)); |
505 |
assert(newts > 0); |
506 |
|
507 |
/* It's a client changing nick and causing a collide */ |
508 |
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
509 |
{ |
510 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
511 |
"Nick change collision from %s to %s(%s <- %s)(both killed)", |
512 |
source_p->name, target_p->name, target_p->from->name, |
513 |
source_p->from->name); |
514 |
|
515 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
516 |
ServerStats.is_kill += 2; |
517 |
|
518 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
519 |
me.id, source_p->id, me.name); |
520 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
521 |
me.id, target_p->id, me.name); |
522 |
|
523 |
AddFlag(source_p, FLAGS_KILLED); |
524 |
AddFlag(target_p, FLAGS_KILLED); |
525 |
exit_client(source_p, "Nick collision (old)"); |
526 |
exit_client(target_p, "Nick collision (new)"); |
527 |
return 0; |
528 |
} |
529 |
|
530 |
/* The timestamps are different */ |
531 |
if (!strcmp(target_p->sockhost, "0") || !strcmp(source_p->sockhost, "0")) /* XXX: TBR */ |
532 |
sameuser = !irccmp(target_p->username, source_p->username) && |
533 |
!irccmp(target_p->host, source_p->host); |
534 |
else |
535 |
sameuser = !irccmp(target_p->username, source_p->username) && |
536 |
!irccmp(target_p->sockhost, source_p->sockhost); |
537 |
|
538 |
if ((sameuser && newts < target_p->tsinfo) || |
539 |
(!sameuser && newts > target_p->tsinfo)) |
540 |
{ |
541 |
if (sameuser) |
542 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
543 |
"Nick change collision from %s to %s(%s <- %s)(older killed)", |
544 |
source_p->name, target_p->name, target_p->from->name, |
545 |
source_p->from->name); |
546 |
else |
547 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
548 |
"Nick change collision from %s to %s(%s <- %s)(newer killed)", |
549 |
source_p->name, target_p->name, target_p->from->name, |
550 |
source_p->from->name); |
551 |
|
552 |
++ServerStats.is_kill; |
553 |
|
554 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick change collision)", |
555 |
me.id, source_p->id, me.name); |
556 |
AddFlag(source_p, FLAGS_KILLED); |
557 |
|
558 |
if (sameuser) |
559 |
exit_client(source_p, "Nick collision (old)"); |
560 |
else |
561 |
exit_client(source_p, "Nick collision (new)"); |
562 |
return 0; |
563 |
} |
564 |
|
565 |
if (sameuser) |
566 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
567 |
"Nick collision on %s(%s <- %s)(older killed)", |
568 |
target_p->name, target_p->from->name, |
569 |
source_p->from->name); |
570 |
else |
571 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
572 |
"Nick collision on %s(%s <- %s)(newer killed)", |
573 |
target_p->name, target_p->from->name, |
574 |
source_p->from->name); |
575 |
|
576 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (Nick collision)", |
577 |
me.id, target_p->id, me.name); |
578 |
|
579 |
++ServerStats.is_kill; |
580 |
sendto_one_numeric(target_p, &me, ERR_NICKCOLLISION, target_p->name); |
581 |
|
582 |
AddFlag(target_p, FLAGS_KILLED); |
583 |
exit_client(target_p, "Nick collision"); |
584 |
|
585 |
return 1; |
586 |
} |
587 |
|
588 |
/*! \brief NICK command handler |
589 |
* |
590 |
* \param source_p Pointer to allocated Client struct from which the message |
591 |
* originally comes from. This can be a local or remote client. |
592 |
* \param parc Integer holding the number of supplied arguments. |
593 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
594 |
* pointers. |
595 |
* \note Valid arguments for this command are: |
596 |
* - parv[0] = command |
597 |
* - parv[1] = nickname |
598 |
*/ |
599 |
static int |
600 |
mr_nick(struct Client *source_p, int parc, char *parv[]) |
601 |
{ |
602 |
char nick[NICKLEN + 1] = ""; |
603 |
struct Client *target_p = NULL; |
604 |
struct MaskItem *conf = NULL; |
605 |
|
606 |
if (parc < 2 || EmptyString(parv[1])) |
607 |
{ |
608 |
sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN); |
609 |
return 0; |
610 |
} |
611 |
|
612 |
/* Copy the nick and terminate it */ |
613 |
strlcpy(nick, parv[1], IRCD_MIN(sizeof(nick), ConfigServerInfo.max_nick_length + 1)); |
614 |
|
615 |
/* Check the nickname is ok */ |
616 |
if (!valid_nickname(nick, 1)) |
617 |
{ |
618 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, parv[1], "Erroneous Nickname"); |
619 |
return 0; |
620 |
} |
621 |
|
622 |
/* Check if the nick is resv'd */ |
623 |
if ((conf = find_matching_name_conf(CONF_NRESV, nick, NULL, NULL, 0))) |
624 |
{ |
625 |
++conf->count; |
626 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, conf->reason); |
627 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
628 |
"Forbidding reserved nick %s from user %s", |
629 |
nick, get_client_name(source_p, HIDE_IP)); |
630 |
return 0; |
631 |
} |
632 |
|
633 |
if ((target_p = hash_find_client(nick)) == NULL) |
634 |
set_initial_nick(source_p, nick); |
635 |
else if (source_p == target_p) |
636 |
strlcpy(source_p->name, nick, sizeof(source_p->name)); |
637 |
else |
638 |
sendto_one_numeric(source_p, &me, ERR_NICKNAMEINUSE, target_p->name); |
639 |
|
640 |
return 0; |
641 |
} |
642 |
|
643 |
/*! \brief NICK command handler |
644 |
* |
645 |
* \param source_p Pointer to allocated Client struct from which the message |
646 |
* originally comes from. This can be a local or remote client. |
647 |
* \param parc Integer holding the number of supplied arguments. |
648 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
649 |
* pointers. |
650 |
* \note Valid arguments for this command are: |
651 |
* - parv[0] = command |
652 |
* - parv[1] = nickname |
653 |
*/ |
654 |
static int |
655 |
m_nick(struct Client *source_p, int parc, char *parv[]) |
656 |
{ |
657 |
char nick[NICKLEN + 1] = ""; |
658 |
struct Client *target_p = NULL; |
659 |
struct MaskItem *conf = NULL; |
660 |
|
661 |
assert(MyClient(source_p)); |
662 |
|
663 |
if (parc < 2 || EmptyString(parv[1])) |
664 |
{ |
665 |
sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN); |
666 |
return 0; |
667 |
} |
668 |
|
669 |
/* Mark end of grace period, to prevent nickflooding */ |
670 |
if (!IsFloodDone(source_p)) |
671 |
flood_endgrace(source_p); |
672 |
|
673 |
/* Terminate nick to NICKLEN */ |
674 |
strlcpy(nick, parv[1], IRCD_MIN(sizeof(nick), ConfigServerInfo.max_nick_length + 1)); |
675 |
|
676 |
/* Check the nickname is ok */ |
677 |
if (!valid_nickname(nick, 1)) |
678 |
{ |
679 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, "Erroneous Nickname"); |
680 |
return 0; |
681 |
} |
682 |
|
683 |
if (!IsExemptResv(source_p) && |
684 |
!(HasUMode(source_p, UMODE_OPER) && ConfigGeneral.oper_pass_resv) && |
685 |
(conf = find_matching_name_conf(CONF_NRESV, nick, NULL, NULL, 0))) |
686 |
{ |
687 |
++conf->count; |
688 |
sendto_one_numeric(source_p, &me, ERR_ERRONEUSNICKNAME, nick, conf->reason); |
689 |
sendto_realops_flags(UMODE_REJ, L_ALL, SEND_NOTICE, |
690 |
"Forbidding reserved nick %s from user %s", |
691 |
nick, get_client_name(source_p, HIDE_IP)); |
692 |
return 0; |
693 |
} |
694 |
|
695 |
if ((target_p = hash_find_client(nick)) == NULL) |
696 |
change_local_nick(source_p, nick); |
697 |
else if (target_p == source_p) |
698 |
{ |
699 |
/* |
700 |
* If (target_p == source_p) the client is changing nicks between |
701 |
* equivalent nicknames ie: [nick] -> {nick} |
702 |
*/ |
703 |
|
704 |
/* Check the nick isn't exactly the same */ |
705 |
if (strcmp(target_p->name, nick)) |
706 |
change_local_nick(source_p, nick); |
707 |
} |
708 |
else if (IsUnknown(target_p)) |
709 |
{ |
710 |
/* |
711 |
* If the client that has the nick isn't registered yet (nick but no |
712 |
* user) then drop the unregged client |
713 |
*/ |
714 |
exit_client(target_p, "Overridden by other sign on"); |
715 |
change_local_nick(source_p, nick); |
716 |
} |
717 |
else |
718 |
sendto_one_numeric(source_p, &me, ERR_NICKNAMEINUSE, target_p->name); |
719 |
|
720 |
return 0; |
721 |
} |
722 |
|
723 |
/*! \brief NICK command handler |
724 |
* |
725 |
* \param source_p Pointer to allocated Client struct from which the message |
726 |
* originally comes from. This can be a local or remote client. |
727 |
* \param parc Integer holding the number of supplied arguments. |
728 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
729 |
* pointers. |
730 |
* \note Valid arguments for this command are: |
731 |
* |
732 |
* server -> server nick change |
733 |
* - parv[0] = command |
734 |
* - parv[1] = nickname |
735 |
* - parv[2] = timestamp |
736 |
*/ |
737 |
static int |
738 |
ms_nick(struct Client *source_p, int parc, char *parv[]) |
739 |
{ |
740 |
struct Client *target_p = NULL; |
741 |
|
742 |
if (parc != 3 || EmptyString(parv[parc - 1])) |
743 |
return 0; |
744 |
|
745 |
if (IsServer(source_p)) |
746 |
return 0; /* Servers can't change nicks.. */ |
747 |
|
748 |
if (check_clean_nick(source_p, parv[1], source_p->servptr)) |
749 |
return 0; |
750 |
|
751 |
/* If the nick doesn't exist, allow it and process like normal */ |
752 |
if ((target_p = hash_find_client(parv[1])) == NULL) |
753 |
change_remote_nick(source_p, parv); |
754 |
else if (IsUnknown(target_p)) |
755 |
{ |
756 |
/* We're not living in the past anymore, an unknown client is local only. */ |
757 |
exit_client(target_p, "Overridden by other sign on"); |
758 |
change_remote_nick(source_p, parv); |
759 |
} |
760 |
else if (target_p == source_p) |
761 |
{ |
762 |
if (strcmp(target_p->name, parv[1])) |
763 |
change_remote_nick(source_p, parv); |
764 |
} |
765 |
else if (perform_nick_change_collides(source_p, target_p, parc, parv)) |
766 |
change_remote_nick(source_p, parv); |
767 |
return 0; |
768 |
} |
769 |
|
770 |
/*! \brief UID command handler |
771 |
* |
772 |
* \param source_p Pointer to allocated Client struct from which the message |
773 |
* originally comes from. This can be a local or remote client. |
774 |
* \param parc Integer holding the number of supplied arguments. |
775 |
* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL |
776 |
* pointers. |
777 |
* \note Valid arguments for this command are: |
778 |
* |
779 |
* server introducing new nick/UID (without services support) |
780 |
* - parv[0] = command |
781 |
* - parv[1] = nickname |
782 |
* - parv[2] = hop count |
783 |
* - parv[3] = TS |
784 |
* - parv[4] = umode |
785 |
* - parv[5] = username |
786 |
* - parv[6] = hostname |
787 |
* - parv[7] = ip |
788 |
* - parv[8] = uid |
789 |
* - parv[9] = ircname (gecos) |
790 |
* |
791 |
* server introducing new nick/UID (with services support) |
792 |
* - parv[ 0] = command |
793 |
* - parv[ 1] = nickname |
794 |
* - parv[ 2] = hop count |
795 |
* - parv[ 3] = TS |
796 |
* - parv[ 4] = umode |
797 |
* - parv[ 5] = username |
798 |
* - parv[ 6] = hostname |
799 |
* - parv[ 7] = ip |
800 |
* - parv[ 8] = uid |
801 |
* - parv[ 9] = services id (account name) |
802 |
* - parv[10] = ircname (gecos) |
803 |
*/ |
804 |
static int |
805 |
ms_uid(struct Client *source_p, int parc, char *parv[]) |
806 |
{ |
807 |
struct Client *target_p = NULL; |
808 |
|
809 |
if (parc < 10) |
810 |
return 0; |
811 |
|
812 |
if (check_clean_nick(source_p, parv[1], source_p) || |
813 |
check_clean_user(source_p, parv[1], parv[5], source_p) || |
814 |
check_clean_host(source_p, parv[1], parv[6], source_p)) |
815 |
return 0; |
816 |
|
817 |
/* |
818 |
* If there is an ID collision, kill our client, and kill theirs. |
819 |
* This may generate 401's, but it ensures that both clients always |
820 |
* go, even if the other server refuses to do the right thing. |
821 |
*/ |
822 |
if ((target_p = hash_find_id(parv[8]))) |
823 |
{ |
824 |
sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE, |
825 |
"ID collision on %s(%s <- %s)(both killed)", |
826 |
target_p->name, target_p->from->name, |
827 |
source_p->from->name); |
828 |
|
829 |
sendto_server(NULL, 0, 0, ":%s KILL %s :%s (ID collision)", |
830 |
me.id, target_p->id, me.name); |
831 |
|
832 |
++ServerStats.is_kill; |
833 |
AddFlag(target_p, FLAGS_KILLED); |
834 |
exit_client(target_p, "ID Collision"); |
835 |
return 0; |
836 |
} |
837 |
|
838 |
if ((target_p = hash_find_client(parv[1])) == NULL) |
839 |
uid_from_server(source_p, parc, parv); |
840 |
else if (IsUnknown(target_p)) |
841 |
{ |
842 |
exit_client(target_p, "Overridden by other sign on"); |
843 |
uid_from_server(source_p, parc, parv); |
844 |
} |
845 |
else if (perform_uid_introduction_collides(source_p, target_p, parc, parv)) |
846 |
uid_from_server(source_p, parc, parv); |
847 |
return 0; |
848 |
} |
849 |
|
850 |
static struct Message nick_msgtab = |
851 |
{ |
852 |
"NICK", NULL, 0, 0, 0, MAXPARA, MFLG_SLOW, 0, |
853 |
{ mr_nick, m_nick, ms_nick, m_ignore, m_nick, m_ignore } |
854 |
}; |
855 |
|
856 |
static struct Message uid_msgtab = |
857 |
{ |
858 |
"UID", NULL, 0, 0, 10, MAXPARA, MFLG_SLOW, 0, |
859 |
{ m_ignore, m_ignore, ms_uid, m_ignore, m_ignore, m_ignore } |
860 |
}; |
861 |
|
862 |
static void |
863 |
module_init(void) |
864 |
{ |
865 |
mod_add_cmd(&uid_msgtab); |
866 |
mod_add_cmd(&nick_msgtab); |
867 |
} |
868 |
|
869 |
static void |
870 |
module_exit(void) |
871 |
{ |
872 |
mod_del_cmd(&uid_msgtab); |
873 |
mod_del_cmd(&nick_msgtab); |
874 |
} |
875 |
|
876 |
struct module module_entry = |
877 |
{ |
878 |
.node = { NULL, NULL, NULL }, |
879 |
.name = NULL, |
880 |
.version = "$Revision$", |
881 |
.handle = NULL, |
882 |
.modinit = module_init, |
883 |
.modexit = module_exit, |
884 |
.flags = MODULE_FLAG_CORE |
885 |
}; |