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adx |
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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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* m_nick.c: Sets a users nick. |
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* |
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* Copyright (C) 2002 by the past and present ircd coders, and others. |
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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* USA |
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* |
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knight |
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* $Id$ |
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adx |
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*/ |
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#include "stdinc.h" |
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#include "handlers.h" |
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#include "client.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 "s_conf.h" |
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#include "s_stats.h" |
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#include "s_user.h" |
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#include "whowas.h" |
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#include "s_serv.h" |
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#include "send.h" |
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#include "list.h" |
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#include "channel.h" |
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#include "s_log.h" |
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#include "resv.h" |
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#include "msg.h" |
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#include "parse.h" |
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#include "modules.h" |
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#include "common.h" |
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#include "packet.h" |
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static void m_nick(struct Client *, struct Client *, int, char **); |
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static void mr_nick(struct Client *, struct Client *, int, char **); |
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static void ms_nick(struct Client *, struct Client *, int, char **); |
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static void ms_uid(struct Client *, struct Client *, int, char **); |
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static void nick_from_server(struct Client *, struct Client *, int, char **, |
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time_t, char *, char *); |
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static void client_from_server(struct Client *, struct Client *, int, char **, |
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time_t, char *, char *); |
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static int check_clean_nick(struct Client *client_p, struct Client *source_p, |
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char *nick, char *newnick, |
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struct Client *server_p); |
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static int check_clean_user(struct Client *client_p, char *nick, char *user, |
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struct Client *server_p); |
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static int check_clean_host(struct Client *client_p, char *nick, char *host, |
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struct Client *server_p); |
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static int clean_nick_name(char *, int); |
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static int clean_user_name(char *); |
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static int clean_host_name(char *); |
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static void perform_nick_collides(struct Client *, struct Client *, struct Client *, |
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int, char **, time_t, char *, char *, char *); |
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struct Message nick_msgtab = { |
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"NICK", 0, 0, 1, 0, MFLG_SLOW, 0, |
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{mr_nick, m_nick, ms_nick, m_ignore, m_nick, m_ignore} |
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}; |
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struct Message uid_msgtab = { |
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"UID", 0, 0, 10, 0, MFLG_SLOW, 0, |
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{m_ignore, m_ignore, ms_uid, m_ignore, m_ignore, m_ignore} |
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}; |
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#ifndef STATIC_MODULES |
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void |
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_modinit(void) |
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{ |
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mod_add_cmd(&nick_msgtab); |
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mod_add_cmd(&uid_msgtab); |
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} |
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void |
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_moddeinit(void) |
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{ |
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mod_del_cmd(&nick_msgtab); |
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mod_del_cmd(&uid_msgtab); |
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} |
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knight |
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const char *_version = "$Revision$"; |
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adx |
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#endif |
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/* mr_nick() |
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* |
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* parv[0] = sender prefix |
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* parv[1] = nickname |
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*/ |
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static void |
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mr_nick(struct Client *client_p, struct Client *source_p, |
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int parc, char *parv[]) |
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{ |
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struct Client *target_p, *uclient_p; |
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char nick[NICKLEN]; |
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char *s; |
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dlink_node *ptr; |
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if (parc < 2 || EmptyString(parv[1])) |
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{ |
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sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), |
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me.name, EmptyString(parv[0]) ? "*" : parv[0]); |
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return; |
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} |
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/* Terminate the nick at the first ~ */ |
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/* XXX - Is this still needed?? */ |
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if ((s = strchr(parv[1], '~')) != NULL) |
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*s = '\0'; |
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/* copy the nick and terminate it */ |
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strlcpy(nick, parv[1], sizeof(nick)); |
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/* check the nickname is ok */ |
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if (!clean_nick_name(nick, 1)) |
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{ |
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), |
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me.name, EmptyString(parv[0]) ? "*" : parv[0], parv[1]); |
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return; |
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} |
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/* check if the nick is resv'd */ |
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if (find_matching_name_conf(NRESV_TYPE, nick, NULL, NULL, 0) && |
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!IsExemptResv(source_p)) |
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{ |
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), |
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me.name, EmptyString(parv[0]) ? "*" : parv[0], nick); |
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return; |
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} |
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if ((target_p = find_client(nick)) == NULL) |
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{ |
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if (!ServerInfo.hub && uplink && IsCapable(uplink, CAP_LL)) |
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{ |
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/* We don't know anyone called nick, but our hub might */ |
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DLINK_FOREACH(ptr, unknown_list.head) |
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{ |
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uclient_p = ptr->data; |
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if (!strcmp(nick, uclient_p->llname)) |
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{ |
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/* We're already waiting for a reply about this nick |
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* for someone else. */ |
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sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, "*", nick); |
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return; |
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} |
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} |
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/* Set their llname so we can find them later */ |
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strcpy(source_p->llname, nick); |
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/* Ask the hub about their requested name */ |
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sendto_one(uplink, ":%s NBURST %s %s !%s", me.name, nick, |
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nick, nick); |
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/* wait for LLNICK */ |
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return; |
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} |
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else |
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{ |
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set_initial_nick(client_p, source_p, nick); |
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return; |
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} |
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} |
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else if (source_p == target_p) |
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{ |
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strcpy(source_p->name, nick); |
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return; |
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} |
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else |
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{ |
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sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, "*", nick); |
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} |
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} |
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/* m_nick() |
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* |
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* parv[0] = sender prefix |
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* parv[1] = nickname |
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*/ |
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static void |
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m_nick(struct Client *client_p, struct Client *source_p, |
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int parc, char *parv[]) |
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{ |
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char nick[NICKLEN]; |
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struct Client *target_p; |
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if (parc < 2 || EmptyString(parv[1])) |
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{ |
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sendto_one(source_p, form_str(ERR_NONICKNAMEGIVEN), |
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me.name, parv[0]); |
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return; |
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} |
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/* mark end of grace period, to prevent nickflooding */ |
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if (!IsFloodDone(source_p)) |
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flood_endgrace(source_p); |
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/* terminate nick to NICKLEN */ |
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strlcpy(nick, parv[1], sizeof(nick)); |
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/* check the nickname is ok */ |
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if (!clean_nick_name(nick, 1)) |
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{ |
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), |
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me.name, parv[0], nick); |
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return; |
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} |
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if (find_matching_name_conf(NRESV_TYPE, nick, |
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NULL, NULL, 0) && !IsExemptResv(source_p) && |
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!(IsOper(source_p) && ConfigFileEntry.oper_pass_resv)) |
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{ |
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), |
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me.name, parv[0], nick); |
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return; |
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} |
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if ((target_p = find_client(nick))) |
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{ |
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/* If(target_p == source_p) the client is changing nicks between |
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* equivalent nicknames ie: [nick] -> {nick} |
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*/ |
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if (target_p == source_p) |
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{ |
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/* check the nick isnt exactly the same */ |
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if (!strcmp(target_p->name, nick)) |
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return; /* client is doing :old NICK old ignore it. */ |
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change_local_nick(client_p, source_p, nick); |
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return; |
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} |
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/* if the client that has the nick isn't registered yet (nick but no |
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* user) then drop the unregged client |
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*/ |
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if (IsUnknown(target_p)) |
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{ |
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/* the old code had an if(MyConnect(target_p)) here.. but I cant see |
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* how that can happen, m_nick() is local only --fl_ |
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*/ |
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exit_client(target_p, &me, "Overridden"); |
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change_local_nick(client_p, source_p, nick); |
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return; |
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} |
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else |
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{ |
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sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, |
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parv[0], nick); |
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return; |
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} |
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} |
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else |
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{ |
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if (!ServerInfo.hub && uplink && IsCapable(uplink, CAP_LL)) |
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{ |
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/* The uplink might know someone by this name already. */ |
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sendto_one(uplink, ":%s NBURST %s %s %s", |
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ID_or_name(&me, uplink), nick, |
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nick, source_p->name); |
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return; |
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} |
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else |
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{ |
282 |
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change_local_nick(client_p,source_p,nick); |
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return; |
284 |
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} |
285 |
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} |
286 |
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} |
287 |
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288 |
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/* |
289 |
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* ms_nick() |
290 |
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* |
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* server -> server nick change |
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* parv[0] = sender prefix |
293 |
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* parv[1] = nickname |
294 |
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* parv[2] = TS when nick change |
295 |
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* |
296 |
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* server introducing new nick |
297 |
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* parv[0] = sender prefix |
298 |
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* parv[1] = nickname |
299 |
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* parv[2] = hop count |
300 |
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* parv[3] = TS |
301 |
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* parv[4] = umode |
302 |
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* parv[5] = username |
303 |
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* parv[6] = hostname |
304 |
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* parv[7] = server |
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* parv[8] = ircname |
306 |
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*/ |
307 |
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static void |
308 |
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ms_nick(struct Client *client_p, struct Client *source_p, |
309 |
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int parc, char *parv[]) |
310 |
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{ |
311 |
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struct Client* target_p; |
312 |
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char nick[NICKLEN]; |
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char ngecos[REALLEN + 1]; |
314 |
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time_t newts = 0; |
315 |
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char *nnick = parv[1]; |
316 |
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char *nhop = parv[2]; |
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char *nts = parv[3]; |
318 |
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char *nusername = parv[5]; |
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char *nhost = parv[6]; |
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char *nserver = parv[7]; |
321 |
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322 |
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if (parc < 2 || EmptyString(nnick)) |
323 |
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return; |
324 |
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325 |
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/* fix the lengths */ |
326 |
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strlcpy(nick, nnick, sizeof(nick)); |
327 |
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328 |
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if (parc == 9) |
329 |
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{ |
330 |
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struct Client *server_p = find_server(nserver); |
331 |
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332 |
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strlcpy(ngecos, parv[8], sizeof(ngecos)); |
333 |
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334 |
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if (server_p == NULL) |
335 |
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{ |
336 |
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sendto_realops_flags(UMODE_ALL, L_ALL, |
337 |
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"Invalid server %s from %s for NICK %s", |
338 |
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nserver, source_p->name, nick); |
339 |
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sendto_one(client_p, ":%s KILL %s :%s (Server doesn't exist!)", |
340 |
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me.name, nick, me.name); |
341 |
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return; |
342 |
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} |
343 |
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344 |
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if (check_clean_nick(client_p, source_p, nick, nnick, server_p) || |
345 |
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check_clean_user(client_p, nick, nusername, server_p) || |
346 |
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check_clean_host(client_p, nick, nhost, server_p)) |
347 |
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return; |
348 |
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|
349 |
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/* check the length of the clients gecos */ |
350 |
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if (strlen(parv[8]) > REALLEN) |
351 |
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sendto_realops_flags(UMODE_ALL, L_ALL, |
352 |
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"Long realname from server %s for %s", |
353 |
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nserver, nnick); |
354 |
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355 |
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if (IsServer(source_p)) |
356 |
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newts = atol(nts); |
357 |
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} |
358 |
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else if (parc == 3) |
359 |
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{ |
360 |
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if (IsServer(source_p)) |
361 |
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/* Server's cant change nicks.. */ |
362 |
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return; |
363 |
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364 |
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if (check_clean_nick(client_p, source_p, nick, nnick, |
365 |
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source_p->servptr)) |
366 |
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return; |
367 |
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|
368 |
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/* |
369 |
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* Yes, this is right. HOP field is the TS field for parc = 3 |
370 |
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*/ |
371 |
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newts = atol(nhop); |
372 |
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} |
373 |
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|
374 |
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/* if the nick doesnt exist, allow it and process like normal */ |
375 |
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if (!(target_p = find_client(nick))) |
376 |
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{ |
377 |
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nick_from_server(client_p, source_p, parc, parv, newts, nick, ngecos); |
378 |
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return; |
379 |
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} |
380 |
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|
381 |
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/* we're not living in the past anymore, an unknown client is local only. */ |
382 |
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if (IsUnknown(target_p)) |
383 |
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{ |
384 |
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exit_client(target_p, &me, "Overridden"); |
385 |
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nick_from_server(client_p, source_p, parc, parv, newts, nick, ngecos); |
386 |
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return; |
387 |
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} |
388 |
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|
389 |
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if (target_p == source_p) |
390 |
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{ |
391 |
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if (strcmp(target_p->name, nick)) |
392 |
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{ |
393 |
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/* client changing case of nick */ |
394 |
|
|
nick_from_server(client_p, source_p, parc, parv, newts, nick, ngecos); |
395 |
|
|
return; |
396 |
|
|
} |
397 |
|
|
else |
398 |
|
|
/* client not changing nicks at all */ |
399 |
|
|
return; |
400 |
|
|
} |
401 |
|
|
|
402 |
|
|
perform_nick_collides(source_p, client_p, target_p, |
403 |
|
|
parc, parv, newts, nick, ngecos, NULL); |
404 |
|
|
} |
405 |
|
|
|
406 |
|
|
/* ms_uid() |
407 |
|
|
* |
408 |
|
|
* parv[0] = sender prefix |
409 |
|
|
* parv[1] = nickname |
410 |
|
|
* parv[2] = hop count |
411 |
|
|
* parv[3] = TS |
412 |
|
|
* parv[4] = umode |
413 |
|
|
* parv[5] = username |
414 |
|
|
* parv[6] = hostname |
415 |
|
|
* parv[7] = ip |
416 |
|
|
* parv[8] = uid |
417 |
|
|
* parv[9] = ircname (gecos) |
418 |
|
|
*/ |
419 |
|
|
static void |
420 |
|
|
ms_uid(struct Client *client_p, struct Client *source_p, |
421 |
|
|
int parc, char *parv[]) |
422 |
|
|
{ |
423 |
|
|
struct Client *target_p; |
424 |
|
|
char nick[NICKLEN]; |
425 |
|
|
char ugecos[REALLEN + 1]; |
426 |
|
|
time_t newts = 0; |
427 |
|
|
char *unick = parv[1]; |
428 |
|
|
char *uts = parv[3]; |
429 |
|
|
char *uname = parv[5]; |
430 |
|
|
char *uhost = parv[6]; |
431 |
|
|
char *uid = parv[8]; |
432 |
|
|
|
433 |
|
|
if (EmptyString(unick)) |
434 |
|
|
return; |
435 |
|
|
|
436 |
|
|
/* Fix the lengths */ |
437 |
|
|
strlcpy(nick, parv[1], sizeof(nick)); |
438 |
|
|
strlcpy(ugecos, parv[9], sizeof(ugecos)); |
439 |
|
|
|
440 |
|
|
if (check_clean_nick(client_p, source_p, nick, unick, source_p) || |
441 |
|
|
check_clean_user(client_p, nick, uname, source_p) || |
442 |
|
|
check_clean_host(client_p, nick, uhost, source_p)) |
443 |
|
|
return; |
444 |
|
|
|
445 |
|
|
if (strlen(parv[9]) > REALLEN) |
446 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, "Long realname from server %s for %s", |
447 |
|
|
parv[0], parv[1]); |
448 |
|
|
|
449 |
|
|
newts = atol(uts); |
450 |
|
|
|
451 |
|
|
/* if there is an ID collision, kill our client, and kill theirs. |
452 |
|
|
* this may generate 401's, but it ensures that both clients always |
453 |
|
|
* go, even if the other server refuses to do the right thing. |
454 |
|
|
*/ |
455 |
|
|
if ((target_p = hash_find_id(uid)) != NULL) |
456 |
|
|
{ |
457 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
458 |
|
|
"ID collision on %s(%s <- %s)(both killed)", |
459 |
|
|
target_p->name, target_p->from->name, |
460 |
|
|
client_p->name); |
461 |
|
|
|
462 |
|
|
if (ServerInfo.hub && IsCapable(client_p, CAP_LL)) |
463 |
|
|
add_lazylinkclient(client_p, source_p); |
464 |
|
|
|
465 |
|
|
kill_client_ll_serv_butone(NULL, target_p, "%s (ID collision)", |
466 |
|
|
me.name); |
467 |
|
|
|
468 |
|
|
ServerStats->is_kill++; |
469 |
|
|
|
470 |
|
|
SetKilled(target_p); |
471 |
|
|
exit_client(target_p, &me, "ID Collision"); |
472 |
|
|
return; |
473 |
|
|
} |
474 |
|
|
|
475 |
|
|
if ((target_p = find_client(unick)) == NULL) |
476 |
|
|
client_from_server(client_p, source_p, parc, parv, newts, nick, ugecos); |
477 |
|
|
else if (IsUnknown(target_p)) |
478 |
|
|
{ |
479 |
|
|
exit_client(target_p, &me, "Overridden"); |
480 |
|
|
client_from_server(client_p, source_p, parc, parv, newts, nick, ugecos); |
481 |
|
|
} |
482 |
|
|
else |
483 |
|
|
perform_nick_collides(source_p, client_p, target_p, |
484 |
|
|
parc, parv, newts, nick, ugecos, uid); |
485 |
|
|
} |
486 |
|
|
|
487 |
|
|
/* check_clean_nick() |
488 |
|
|
* |
489 |
|
|
* input - pointer to source |
490 |
|
|
* - |
491 |
|
|
* - nickname |
492 |
|
|
* - truncated nickname |
493 |
|
|
* - origin of client |
494 |
|
|
* - pointer to server nick is coming from |
495 |
|
|
* output - none |
496 |
|
|
* side effects - if nickname is erroneous, or a different length to |
497 |
|
|
* truncated nickname, return 1 |
498 |
|
|
*/ |
499 |
|
|
static int |
500 |
|
|
check_clean_nick(struct Client *client_p, struct Client *source_p, |
501 |
|
|
char *nick, char *newnick, struct Client *server_p) |
502 |
|
|
{ |
503 |
|
|
/* the old code did some wacky stuff here, if the nick is invalid, kill it |
504 |
|
|
* and dont bother messing at all |
505 |
|
|
*/ |
506 |
|
|
if (!clean_nick_name(nick, 0) || strcmp(nick, newnick)) |
507 |
|
|
{ |
508 |
|
|
ServerStats->is_kill++; |
509 |
|
|
sendto_realops_flags(UMODE_DEBUG, L_ALL, |
510 |
|
|
"Bad Nick: %s From: %s(via %s)", |
511 |
|
|
nick, server_p->name, client_p->name); |
512 |
|
|
|
513 |
|
|
sendto_one(client_p, ":%s KILL %s :%s (Bad Nickname)", |
514 |
|
|
me.name, newnick, me.name); |
515 |
|
|
|
516 |
|
|
/* bad nick change */ |
517 |
|
|
if (source_p != client_p) |
518 |
|
|
{ |
519 |
|
|
kill_client_ll_serv_butone(client_p, source_p, |
520 |
|
|
"%s (Bad Nickname)", |
521 |
|
|
me.name); |
522 |
|
|
SetKilled(source_p); |
523 |
|
|
exit_client(source_p, &me, "Bad Nickname"); |
524 |
|
|
} |
525 |
|
|
|
526 |
|
|
return (1); |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
return (0); |
530 |
|
|
} |
531 |
|
|
|
532 |
|
|
/* check_clean_user() |
533 |
|
|
* |
534 |
|
|
* input - pointer to client sending data |
535 |
|
|
* - nickname |
536 |
|
|
* - username to check |
537 |
|
|
* - origin of NICK |
538 |
|
|
* output - none |
539 |
|
|
* side effects - if username is erroneous, return 1 |
540 |
|
|
*/ |
541 |
|
|
static int |
542 |
|
|
check_clean_user(struct Client *client_p, char *nick, |
543 |
|
|
char *user, struct Client *server_p) |
544 |
|
|
{ |
545 |
|
|
if (strlen(user) > USERLEN) |
546 |
|
|
{ |
547 |
|
|
ServerStats->is_kill++; |
548 |
|
|
sendto_realops_flags(UMODE_DEBUG, L_ALL, |
549 |
|
|
"Long Username: %s Nickname: %s From: %s(via %s)", |
550 |
|
|
user, nick, server_p->name, client_p->name); |
551 |
|
|
|
552 |
|
|
sendto_one(client_p, ":%s KILL %s :%s (Bad Username)", |
553 |
|
|
me.name, nick, me.name); |
554 |
|
|
|
555 |
|
|
return (1); |
556 |
|
|
} |
557 |
|
|
|
558 |
|
|
if (!clean_user_name(user)) |
559 |
|
|
sendto_realops_flags(UMODE_DEBUG, L_ALL, |
560 |
|
|
"Bad Username: %s Nickname: %s From: %s(via %s)", |
561 |
|
|
user, nick, server_p->name, client_p->name); |
562 |
|
|
|
563 |
|
|
return (0); |
564 |
|
|
} |
565 |
|
|
|
566 |
|
|
/* check_clean_host() |
567 |
|
|
* |
568 |
|
|
* input - pointer to client sending us data |
569 |
|
|
* - nickname |
570 |
|
|
* - hostname to check |
571 |
|
|
* - source name |
572 |
|
|
* output - none |
573 |
|
|
* side effects - if hostname is erroneous, return 1 |
574 |
|
|
*/ |
575 |
|
|
static int |
576 |
|
|
check_clean_host(struct Client *client_p, char *nick, |
577 |
|
|
char *host, struct Client *server_p) |
578 |
|
|
{ |
579 |
|
|
if (strlen(host) > HOSTLEN) |
580 |
|
|
{ |
581 |
|
|
ServerStats->is_kill++; |
582 |
|
|
sendto_realops_flags(UMODE_DEBUG, L_ALL, |
583 |
|
|
"Long Hostname: %s Nickname: %s From: %s(via %s)", |
584 |
|
|
host, nick, server_p->name, client_p->name); |
585 |
|
|
|
586 |
|
|
sendto_one(client_p, ":%s KILL %s :%s (Bad Hostname)", |
587 |
|
|
me.name, nick, me.name); |
588 |
|
|
|
589 |
|
|
return (1); |
590 |
|
|
} |
591 |
|
|
|
592 |
|
|
if (!clean_host_name(host)) |
593 |
|
|
sendto_realops_flags(UMODE_DEBUG, L_ALL, |
594 |
|
|
"Bad Hostname: %s Nickname: %s From: %s(via %s)", |
595 |
|
|
host, nick, server_p->name, client_p->name); |
596 |
|
|
|
597 |
|
|
return (0); |
598 |
|
|
} |
599 |
|
|
|
600 |
|
|
/* clean_nick_name() |
601 |
|
|
* |
602 |
|
|
* input - nickname |
603 |
|
|
* - whether it's a local nick (1) or remote (0) |
604 |
|
|
* output - none |
605 |
|
|
* side effects - walks through the nickname, returning 0 if erroneous |
606 |
|
|
*/ |
607 |
|
|
static int |
608 |
|
|
clean_nick_name(char *nick, int local) |
609 |
|
|
{ |
610 |
|
|
assert(nick); |
611 |
|
|
if (nick == NULL) |
612 |
|
|
return (0); |
613 |
|
|
|
614 |
|
|
/* nicks cant start with a digit or - or be 0 length */ |
615 |
|
|
/* This closer duplicates behaviour of hybrid-6 */ |
616 |
|
|
|
617 |
|
|
if (*nick == '-' || (IsDigit(*nick) && local) || *nick == '\0') |
618 |
|
|
return (0); |
619 |
|
|
|
620 |
|
|
for(; *nick; nick++) |
621 |
|
|
{ |
622 |
|
|
if (!IsNickChar(*nick)) |
623 |
|
|
return (0); |
624 |
|
|
} |
625 |
|
|
|
626 |
|
|
return (1); |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
/* clean_user_name() |
630 |
|
|
* |
631 |
|
|
* input - username |
632 |
|
|
* output - none |
633 |
|
|
* side effects - walks through the username, returning 0 if erroneous |
634 |
|
|
*/ |
635 |
|
|
static int |
636 |
|
|
clean_user_name(char *user) |
637 |
|
|
{ |
638 |
|
|
assert(user); |
639 |
|
|
if (user == NULL) |
640 |
|
|
return 0; |
641 |
|
|
|
642 |
|
|
for(; *user; user++) |
643 |
|
|
{ |
644 |
|
|
if (!IsUserChar(*user)) |
645 |
|
|
return 0; |
646 |
|
|
} |
647 |
|
|
|
648 |
|
|
return 1; |
649 |
|
|
} |
650 |
|
|
|
651 |
|
|
/* clean_host_name() |
652 |
|
|
* input - hostname |
653 |
|
|
* output - none |
654 |
|
|
* side effects - walks through the hostname, returning 0 if erroneous |
655 |
|
|
*/ |
656 |
|
|
static int |
657 |
|
|
clean_host_name(char *host) |
658 |
|
|
{ |
659 |
|
|
assert(host); |
660 |
|
|
if (host == NULL) |
661 |
|
|
return 0; |
662 |
|
|
for(; *host; host++) |
663 |
|
|
{ |
664 |
|
|
if (!IsHostChar(*host)) |
665 |
|
|
return 0; |
666 |
|
|
} |
667 |
|
|
|
668 |
|
|
return 1; |
669 |
|
|
} |
670 |
|
|
|
671 |
|
|
/* |
672 |
|
|
* nick_from_server() |
673 |
|
|
*/ |
674 |
|
|
static void |
675 |
|
|
nick_from_server(struct Client *client_p, struct Client *source_p, int parc, |
676 |
|
|
char *parv[], time_t newts, char *nick, char *ngecos) |
677 |
|
|
{ |
678 |
|
|
if (IsServer(source_p)) |
679 |
|
|
{ |
680 |
|
|
/* A server introducing a new client, change source */ |
681 |
|
|
source_p = make_client(client_p); |
682 |
|
|
dlinkAdd(source_p, &source_p->node, &global_client_list); |
683 |
|
|
|
684 |
|
|
/* We don't need to introduce leafs clients back to them! */ |
685 |
|
|
if (ServerInfo.hub && IsCapable(client_p, CAP_LL)) |
686 |
|
|
add_lazylinkclient(client_p, source_p); |
687 |
|
|
|
688 |
|
|
if (parc > 2) |
689 |
|
|
source_p->hopcount = atoi(parv[2]); |
690 |
|
|
if (newts) |
691 |
|
|
source_p->tsinfo = newts; |
692 |
|
|
else |
693 |
|
|
{ |
694 |
|
|
newts = source_p->tsinfo = CurrentTime; |
695 |
|
|
ts_warn("Remote nick %s (%s) introduced without a TS", nick, parv[0]); |
696 |
|
|
} |
697 |
|
|
|
698 |
|
|
/* copy the nick in place */ |
699 |
|
|
strcpy(source_p->name, nick); |
700 |
|
|
hash_add_client(source_p); |
701 |
|
|
|
702 |
|
|
if (parc > 8) |
703 |
|
|
{ |
704 |
|
|
unsigned int flag; |
705 |
|
|
char *m; |
706 |
|
|
|
707 |
|
|
/* parse usermodes */ |
708 |
|
|
m = &parv[4][1]; |
709 |
|
|
|
710 |
|
|
while (*m) |
711 |
|
|
{ |
712 |
|
|
flag = user_modes[(unsigned char)*m]; |
713 |
|
|
if (!(source_p->umodes & UMODE_INVISIBLE) && (flag & UMODE_INVISIBLE)) |
714 |
|
|
Count.invisi++; |
715 |
|
|
if (!(source_p->umodes & UMODE_OPER) && (flag & UMODE_OPER)) |
716 |
|
|
Count.oper++; |
717 |
|
|
|
718 |
|
|
source_p->umodes |= flag & SEND_UMODES; |
719 |
|
|
m++; |
720 |
|
|
} |
721 |
|
|
|
722 |
|
|
register_remote_user(client_p, source_p, parv[5], parv[6], |
723 |
|
|
parv[7], ngecos); |
724 |
|
|
} |
725 |
|
|
|
726 |
|
|
} |
727 |
|
|
else if (source_p->name[0]) |
728 |
|
|
{ |
729 |
|
|
/* client changing their nick */ |
730 |
|
|
if (irccmp(parv[0], nick)) |
731 |
|
|
source_p->tsinfo = newts ? newts : CurrentTime; |
732 |
|
|
|
733 |
|
|
sendto_common_channels_local(source_p, 1, ":%s!%s@%s NICK :%s", |
734 |
|
|
source_p->name,source_p->username, |
735 |
|
|
source_p->host, nick); |
736 |
|
|
|
737 |
|
|
add_history(source_p,1); |
738 |
|
|
sendto_server(client_p, source_p, NULL, CAP_TS6, NOCAPS, NOFLAGS, |
739 |
|
|
":%s NICK %s :%lu", |
740 |
|
|
ID(source_p), nick, (unsigned long)source_p->tsinfo); |
741 |
|
|
sendto_server(client_p, source_p, NULL, NOCAPS, CAP_TS6, NOFLAGS, |
742 |
|
|
":%s NICK %s :%lu", |
743 |
|
|
parv[0], nick, (unsigned long)source_p->tsinfo); |
744 |
|
|
} |
745 |
|
|
|
746 |
|
|
/* set the new nick name */ |
747 |
|
|
if (source_p->name[0]) |
748 |
|
|
hash_del_client(source_p); |
749 |
|
|
|
750 |
|
|
strcpy(source_p->name, nick); |
751 |
|
|
hash_add_client(source_p); |
752 |
|
|
} |
753 |
|
|
|
754 |
|
|
/* |
755 |
|
|
* client_from_server() |
756 |
|
|
*/ |
757 |
|
|
static void |
758 |
|
|
client_from_server(struct Client *client_p, struct Client *source_p, int parc, |
759 |
|
|
char *parv[], time_t newts, char *nick, char *ugecos) |
760 |
|
|
{ |
761 |
|
|
char *m; |
762 |
|
|
unsigned int flag; |
763 |
|
|
const char *servername = source_p->name; |
764 |
|
|
|
765 |
|
|
source_p = make_client(client_p); |
766 |
|
|
dlinkAdd(source_p, &source_p->node, &global_client_list); |
767 |
|
|
|
768 |
|
|
/* We don't need to introduce leafs clients back to them! */ |
769 |
|
|
if (ServerInfo.hub && IsCapable(client_p, CAP_LL)) |
770 |
|
|
add_lazylinkclient(client_p, source_p); |
771 |
|
|
|
772 |
|
|
source_p->hopcount = atoi(parv[2]); |
773 |
|
|
source_p->tsinfo = newts; |
774 |
|
|
|
775 |
|
|
/* copy the nick in place */ |
776 |
|
|
strcpy(source_p->name, nick); |
777 |
|
|
strlcpy(source_p->id, parv[8], sizeof(source_p->id)); |
778 |
|
|
strlcpy(source_p->sockhost, parv[7], sizeof(source_p->sockhost)); |
779 |
|
|
|
780 |
|
|
hash_add_client(source_p); |
781 |
|
|
hash_add_id(source_p); |
782 |
|
|
|
783 |
|
|
/* parse usermodes */ |
784 |
|
|
m = &parv[4][1]; |
785 |
|
|
while (*m) |
786 |
|
|
{ |
787 |
|
|
flag = user_modes[(unsigned char)*m]; |
788 |
|
|
if (flag & UMODE_INVISIBLE) |
789 |
|
|
Count.invisi++; |
790 |
|
|
if (flag & UMODE_OPER) |
791 |
|
|
Count.oper++; |
792 |
|
|
|
793 |
|
|
source_p->umodes |= flag & SEND_UMODES; |
794 |
|
|
m++; |
795 |
|
|
} |
796 |
|
|
|
797 |
|
|
register_remote_user(client_p, source_p, parv[5], parv[6], |
798 |
|
|
servername, ugecos); |
799 |
|
|
} |
800 |
|
|
|
801 |
|
|
static void |
802 |
|
|
perform_nick_collides(struct Client *source_p, struct Client *client_p, |
803 |
|
|
struct Client *target_p, int parc, char *parv[], |
804 |
|
|
time_t newts, char *nick, char *gecos, char *uid) |
805 |
|
|
{ |
806 |
|
|
int sameuser; |
807 |
|
|
|
808 |
|
|
/* server introducing new nick */ |
809 |
|
|
if (IsServer(source_p)) |
810 |
|
|
{ |
811 |
|
|
/* if we dont have a ts, or their TS's are the same, kill both */ |
812 |
|
|
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
813 |
|
|
{ |
814 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
815 |
|
|
"Nick collision on %s(%s <- %s)(both killed)", |
816 |
|
|
target_p->name, target_p->from->name, |
817 |
|
|
client_p->name); |
818 |
|
|
|
819 |
|
|
if (ServerInfo.hub && IsCapable(client_p,CAP_LL)) |
820 |
|
|
add_lazylinkclient(client_p, target_p); |
821 |
|
|
|
822 |
|
|
/* if we have a UID, issue a kill for it */ |
823 |
|
|
if (uid) |
824 |
|
|
sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))", |
825 |
|
|
me.id, uid, me.name); |
826 |
|
|
|
827 |
|
|
kill_client_ll_serv_butone(NULL, target_p, |
828 |
|
|
"%s (Nick collision (new))", |
829 |
|
|
me.name); |
830 |
|
|
ServerStats->is_kill++; |
831 |
|
|
sendto_one(target_p, form_str(ERR_NICKCOLLISION), |
832 |
|
|
me.name, target_p->name, target_p->name); |
833 |
|
|
|
834 |
|
|
SetKilled(target_p); |
835 |
|
|
exit_client(target_p, &me, "Nick collision (new)"); |
836 |
|
|
return; |
837 |
|
|
} |
838 |
|
|
/* the timestamps are different */ |
839 |
|
|
else |
840 |
|
|
{ |
841 |
|
|
sameuser = !irccmp(target_p->username, parv[5]) && |
842 |
|
|
!irccmp(target_p->host, parv[6]); |
843 |
|
|
|
844 |
|
|
/* if the users are the same (loaded a client on a different server) |
845 |
|
|
* and the new users ts is older, or the users are different and the |
846 |
|
|
* new users ts is newer, ignore the new client and let it do the kill |
847 |
|
|
*/ |
848 |
|
|
if ((sameuser && newts < target_p->tsinfo) || |
849 |
|
|
(!sameuser && newts > target_p->tsinfo)) |
850 |
|
|
{ |
851 |
|
|
if (uid) |
852 |
|
|
sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))", |
853 |
|
|
me.id, uid, me.name); |
854 |
|
|
|
855 |
|
|
client_burst_if_needed(client_p, target_p); |
856 |
|
|
return; |
857 |
|
|
} |
858 |
|
|
else |
859 |
|
|
{ |
860 |
|
|
if (sameuser) |
861 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
862 |
|
|
"Nick collision on %s(%s <- %s)(older killed)", |
863 |
|
|
target_p->name, target_p->from->name, |
864 |
|
|
client_p->name); |
865 |
|
|
else |
866 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
867 |
|
|
"Nick collision on %s(%s <- %s)(newer killed)", |
868 |
|
|
target_p->name, target_p->from->name, |
869 |
|
|
client_p->name); |
870 |
|
|
|
871 |
|
|
ServerStats->is_kill++; |
872 |
|
|
sendto_one(target_p, form_str(ERR_NICKCOLLISION), |
873 |
|
|
me.name, target_p->name, target_p->name); |
874 |
|
|
|
875 |
|
|
/* if it came from a LL server, itd have been source_p, |
876 |
|
|
* so we dont need to mark target_p as known |
877 |
|
|
*/ |
878 |
|
|
kill_client_ll_serv_butone(source_p, target_p, |
879 |
|
|
"%s (Nick collision (new))", |
880 |
|
|
me.name); |
881 |
|
|
|
882 |
|
|
SetKilled(target_p); |
883 |
|
|
exit_client(target_p, &me, "Nick collision"); |
884 |
|
|
|
885 |
|
|
if (parc == 9) |
886 |
|
|
nick_from_server(client_p, source_p, parc, parv, newts, nick, gecos); |
887 |
|
|
else if (parc == 10) |
888 |
|
|
client_from_server(client_p, source_p, parc, parv, newts, nick, gecos); |
889 |
|
|
|
890 |
|
|
return; |
891 |
|
|
} |
892 |
|
|
} |
893 |
|
|
} |
894 |
|
|
|
895 |
|
|
/* its a client changing nick and causing a collide */ |
896 |
|
|
if (!newts || !target_p->tsinfo || (newts == target_p->tsinfo)) |
897 |
|
|
{ |
898 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
899 |
|
|
"Nick change collision from %s to %s(%s <- %s)(both killed)", |
900 |
|
|
source_p->name, target_p->name, target_p->from->name, |
901 |
|
|
client_p->name); |
902 |
|
|
|
903 |
|
|
ServerStats->is_kill++; |
904 |
|
|
sendto_one(target_p, form_str(ERR_NICKCOLLISION), |
905 |
|
|
me.name, target_p->name, target_p->name); |
906 |
|
|
|
907 |
|
|
/* if we got the message from a LL, it knows about source_p */ |
908 |
|
|
kill_client_ll_serv_butone(NULL, source_p, |
909 |
|
|
"%s (Nick change collision)", |
910 |
|
|
me.name); |
911 |
|
|
|
912 |
|
|
ServerStats->is_kill++; |
913 |
|
|
/* If we got the message from a LL, ensure it gets the kill */ |
914 |
|
|
if (ServerInfo.hub && IsCapable(client_p,CAP_LL)) |
915 |
|
|
add_lazylinkclient(client_p, target_p); |
916 |
|
|
|
917 |
|
|
kill_client_ll_serv_butone(NULL, target_p, |
918 |
|
|
"%s (Nick change collision)", |
919 |
|
|
me.name); |
920 |
|
|
|
921 |
|
|
SetKilled(target_p); |
922 |
|
|
exit_client(target_p, &me, "Nick collision (new)"); |
923 |
|
|
SetKilled(source_p); |
924 |
|
|
exit_client(source_p, &me, "Nick collision (old)"); |
925 |
|
|
return; |
926 |
|
|
} |
927 |
|
|
else |
928 |
|
|
{ |
929 |
|
|
sameuser = !irccmp(target_p->username, source_p->username) && |
930 |
|
|
!irccmp(target_p->host, source_p->host); |
931 |
|
|
|
932 |
|
|
if ((sameuser && newts < target_p->tsinfo) || |
933 |
|
|
(!sameuser && newts > target_p->tsinfo)) |
934 |
|
|
{ |
935 |
|
|
if (sameuser) |
936 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
937 |
|
|
"Nick change collision from %s to %s(%s <- %s)(older killed)", |
938 |
|
|
source_p->name, target_p->name, target_p->from->name, |
939 |
|
|
client_p->name); |
940 |
|
|
else |
941 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
942 |
|
|
"Nick change collision from %s to %s(%s <- %s)(newer killed)", |
943 |
|
|
source_p->name, target_p->name, target_p->from->name, |
944 |
|
|
client_p->name); |
945 |
|
|
|
946 |
|
|
ServerStats->is_kill++; |
947 |
|
|
|
948 |
|
|
/* this won't go back to the incoming link, so LL doesnt matter */ |
949 |
|
|
kill_client_ll_serv_butone(client_p, source_p, |
950 |
|
|
"%s (Nick change collision)", |
951 |
|
|
me.name); |
952 |
|
|
|
953 |
|
|
SetKilled(source_p); |
954 |
|
|
|
955 |
|
|
if (sameuser) |
956 |
|
|
exit_client(source_p, &me, "Nick collision (old)"); |
957 |
|
|
else |
958 |
|
|
exit_client(source_p, &me, "Nick collision (new)"); |
959 |
|
|
return; |
960 |
|
|
} |
961 |
|
|
else |
962 |
|
|
{ |
963 |
|
|
if (sameuser) |
964 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
965 |
|
|
"Nick collision on %s(%s <- %s)(older killed)", |
966 |
|
|
target_p->name, target_p->from->name, |
967 |
|
|
client_p->name); |
968 |
|
|
else |
969 |
|
|
sendto_realops_flags(UMODE_ALL, L_ALL, |
970 |
|
|
"Nick collision on %s(%s <- %s)(newer killed)", |
971 |
|
|
target_p->name, target_p->from->name, |
972 |
|
|
client_p->name); |
973 |
|
|
|
974 |
|
|
kill_client_ll_serv_butone(source_p, target_p, |
975 |
|
|
"%s (Nick collision)", |
976 |
|
|
me.name); |
977 |
|
|
|
978 |
|
|
ServerStats->is_kill++; |
979 |
|
|
sendto_one(target_p, form_str(ERR_NICKCOLLISION), |
980 |
|
|
me.name, target_p->name, target_p->name); |
981 |
|
|
|
982 |
|
|
SetKilled(target_p); |
983 |
|
|
exit_client(target_p, &me, "Nick collision"); |
984 |
|
|
} |
985 |
|
|
} |
986 |
|
|
|
987 |
|
|
/* we should only ever call nick_from_server() here, as |
988 |
|
|
* this is a client changing nick, not a new client |
989 |
|
|
*/ |
990 |
|
|
nick_from_server(client_p, source_p, parc, parv, newts, nick, gecos); |
991 |
|
|
} |