1215 lines
33 KiB
C
1215 lines
33 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_nick.c: Sets a users nick.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "stdinc.h"
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#include "client.h"
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#include "hash.h"
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#include "match.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 "hash.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 "channel.h"
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#include "logger.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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#include "scache.h"
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#include "s_newconf.h"
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#include "monitor.h"
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#include "s_assert.h"
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/* Give all UID nicks the same TS. This ensures nick TS is always the same on
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* all servers for each nick-user pair, also if a user with a UID nick changes
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* their nick but is collided again (the server detecting the collision will
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* not propagate the nick change further). -- jilles
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*/
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#define SAVE_NICKTS 100
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static int mr_nick(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int m_nick(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int mc_nick(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int ms_nick(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int ms_uid(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int ms_euid(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int ms_save(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static int can_save(struct Client *);
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static void save_user(struct Client *, struct Client *, struct Client *);
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static void bad_nickname(struct Client *, const char *);
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struct Message nick_msgtab = {
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"NICK", 0, 0, 0, 0,
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{{mr_nick, 0}, {m_nick, 0}, {mc_nick, 3}, {ms_nick, 0}, mg_ignore, {m_nick, 0}}
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};
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struct Message uid_msgtab = {
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"UID", 0, 0, 0, 0,
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{mg_ignore, mg_ignore, mg_ignore, {ms_uid, 9}, mg_ignore, mg_ignore}
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};
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struct Message euid_msgtab = {
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"EUID", 0, 0, 0, 0,
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{mg_ignore, mg_ignore, mg_ignore, {ms_euid, 12}, mg_ignore, mg_ignore}
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};
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struct Message save_msgtab = {
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"SAVE", 0, 0, 0, 0,
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{mg_ignore, mg_ignore, mg_ignore, {ms_save, 3}, mg_ignore, mg_ignore}
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};
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mapi_clist_av1 nick_clist[] = { &nick_msgtab, &uid_msgtab, &euid_msgtab,
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&save_msgtab, NULL };
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DECLARE_MODULE_AV1(nick, NULL, NULL, nick_clist, NULL, NULL, "$Revision: 3518 $");
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static int change_remote_nick(struct Client *, struct Client *, time_t,
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const char *, int);
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static int clean_username(const char *);
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static int clean_host(const char *);
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static int clean_uid(const char *uid, const char *sid);
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static void set_initial_nick(struct Client *client_p, struct Client *source_p, char *nick);
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static void change_local_nick(struct Client *client_p, struct Client *source_p, char *nick, int);
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static int register_client(struct Client *client_p, struct Client *server,
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const char *nick, time_t newts, int parc, const char *parv[]);
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static int perform_nick_collides(struct Client *, struct Client *,
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struct Client *, int, const char **,
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time_t, const char *, const char *);
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static int perform_nickchange_collides(struct Client *, struct Client *,
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struct Client *, int, const char **, time_t, const char *);
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/* mr_nick()
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* parv[1] = nickname
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*/
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static int
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mr_nick(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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char nick[NICKLEN];
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if (strlen(client_p->id) == 3)
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{
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exit_client(client_p, client_p, client_p, "Mixing client and server protocol");
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return 0;
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}
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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(source_p->name) ? "*" : source_p->name);
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return 0;
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}
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/* copy the nick and terminate it */
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rb_strlcpy(nick, parv[1], ConfigFileEntry.nicklen);
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/* check the nickname is ok */
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if(!clean_nick(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(source_p->name) ? "*" : source_p->name, parv[1]);
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return 0;
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}
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/* check if the nick is resv'd */
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if(find_nick_resv(nick))
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{
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME),
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me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick);
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return 0;
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}
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if(irc_dictionary_find(nd_dict, nick))
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{
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sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
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me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick);
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return 0;
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}
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if((target_p = find_named_client(nick)) == NULL)
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set_initial_nick(client_p, source_p, nick);
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else if(source_p == target_p)
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strcpy(source_p->name, nick);
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else
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sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, "*", nick);
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return 0;
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}
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/* m_nick()
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* parv[1] = nickname
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*/
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static int
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m_nick(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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char nick[NICKLEN];
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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), me.name, source_p->name);
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return 0;
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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, we dont want clean_nick() to error! */
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rb_strlcpy(nick, parv[1], ConfigFileEntry.nicklen);
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/* check the nickname is ok */
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if(!clean_nick(nick, 1))
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{
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, source_p->name, nick);
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return 0;
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}
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if(!IsExemptResv(source_p) && find_nick_resv(nick))
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{
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sendto_one(source_p, form_str(ERR_ERRONEUSNICKNAME), me.name, source_p->name, nick);
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return 0;
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}
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if(irc_dictionary_find(nd_dict, nick))
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{
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sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
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me.name, EmptyString(source_p->name) ? "*" : source_p->name, nick);
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return 0;
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}
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if((target_p = find_named_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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change_local_nick(client_p, source_p, nick, 1);
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}
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/* drop unregged client */
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else if(IsUnknown(target_p))
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{
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exit_client(NULL, target_p, &me, "Overridden");
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change_local_nick(client_p, source_p, nick, 1);
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}
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else
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sendto_one(source_p, form_str(ERR_NICKNAMEINUSE), me.name, source_p->name, nick);
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return 0;
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}
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else
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change_local_nick(client_p, source_p, nick, 1);
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return 0;
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}
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/* mc_nick()
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*
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* server -> server nick change
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* parv[1] = nickname
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* parv[2] = TS when nick change
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*/
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static int
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mc_nick(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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time_t newts = 0;
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/* if nicks erroneous, or too long, kill */
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if(!clean_nick(parv[1], 0))
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{
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bad_nickname(client_p, parv[1]);
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return 0;
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}
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newts = atol(parv[2]);
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target_p = find_named_client(parv[1]);
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/* if the nick doesnt exist, allow it and process like normal */
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if(target_p == NULL)
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{
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change_remote_nick(client_p, source_p, newts, parv[1], 1);
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}
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else if(IsUnknown(target_p))
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{
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exit_client(NULL, target_p, &me, "Overridden");
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change_remote_nick(client_p, source_p, newts, parv[1], 1);
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}
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else if(target_p == source_p)
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{
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/* client changing case of nick */
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if(strcmp(target_p->name, parv[1]))
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change_remote_nick(client_p, source_p, newts, parv[1], 1);
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}
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/* we've got a collision! */
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else
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perform_nickchange_collides(source_p, client_p, target_p,
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parc, parv, newts, parv[1]);
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return 0;
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}
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static int
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ms_nick(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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const char *nick, *server;
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nick = parc > 1 ? parv[1] : "?";
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server = parc > 7 ? parv[7] : "?";
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sendto_wallops_flags(UMODE_WALLOP, &me,
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"Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
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client_p->name, nick, server);
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sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
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":%s WALLOPS :Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
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me.id, client_p->name, nick, server);
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ilog(L_SERVER, "Link %s cancelled, TS5 nickname %s on %s introduced (old server?)",
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client_p->name, nick, server);
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exit_client(client_p, client_p, &me, "TS5 nickname introduced");
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return 0;
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}
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/* ms_uid()
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* parv[1] - nickname
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* parv[2] - hops
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* parv[3] - TS
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* parv[4] - umodes
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* parv[5] - username
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* parv[6] - hostname
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* parv[7] - IP
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* parv[8] - UID
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* parv[9] - gecos
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*/
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static int
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ms_uid(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Client *target_p;
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time_t newts = 0;
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char squitreason[120];
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newts = atol(parv[3]);
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if(parc != 10)
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Dropping server %s due to (invalid) command 'UID' "
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"with %d arguments (expecting 10)", client_p->name, parc);
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ilog(L_SERVER, "Excess parameters (%d) for command 'UID' from %s.",
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parc, client_p->name);
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snprintf(squitreason, sizeof squitreason,
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"Excess parameters (%d) to %s command, expecting %d",
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parc, "UID", 10);
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exit_client(client_p, client_p, client_p, squitreason);
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return 0;
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}
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/* if nicks erroneous, or too long, kill */
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if(!clean_nick(parv[1], 0))
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{
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bad_nickname(client_p, parv[1]);
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return 0;
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}
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if(!clean_uid(parv[8], source_p->id))
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{
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snprintf(squitreason, sizeof squitreason,
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"Invalid UID %s for nick %s on %s/%s",
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parv[8], parv[1], source_p->name, source_p->id);
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exit_client(client_p, client_p, client_p, squitreason);
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return 0;
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}
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if(!clean_username(parv[5]) || !clean_host(parv[6]))
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{
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ServerStats.is_kill++;
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sendto_realops_snomask(SNO_DEBUG, L_ALL,
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"Bad user@host: %s@%s From: %s(via %s)",
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parv[5], parv[6], source_p->name, client_p->name);
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sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
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return 0;
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}
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/* check length of clients gecos */
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if(strlen(parv[9]) > REALLEN)
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{
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char *s = LOCAL_COPY(parv[9]);
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sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s",
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source_p->name, parv[1]);
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s[REALLEN] = '\0';
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parv[9] = s;
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}
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target_p = find_named_client(parv[1]);
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if(target_p == NULL)
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{
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register_client(client_p, source_p, parv[1], newts, parc, parv);
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}
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else if(IsUnknown(target_p))
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{
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exit_client(NULL, target_p, &me, "Overridden");
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register_client(client_p, source_p, parv[1], newts, parc, parv);
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}
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/* we've got a collision! */
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else
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perform_nick_collides(source_p, client_p, target_p, parc, parv,
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newts, parv[1], parv[8]);
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return 0;
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}
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/* ms_euid()
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* parv[1] - nickname
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* parv[2] - hops
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* parv[3] - TS
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* parv[4] - umodes
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* parv[5] - username
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* parv[6] - hostname
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* parv[7] - IP
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* parv[8] - UID
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* parv[9] - realhost
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* parv[10] - account
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* parv[11] - gecos
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*/
|
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static int
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ms_euid(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
|
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{
|
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struct Client *target_p;
|
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time_t newts = 0;
|
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char squitreason[120];
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newts = atol(parv[3]);
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if(parc != 12)
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Dropping server %s due to (invalid) command 'EUID' "
|
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"with %d arguments (expecting 12)", client_p->name, parc);
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ilog(L_SERVER, "Excess parameters (%d) for command 'EUID' from %s.",
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parc, client_p->name);
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snprintf(squitreason, sizeof squitreason,
|
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"Excess parameters (%d) to %s command, expecting %d",
|
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parc, "EUID", 12);
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exit_client(client_p, client_p, client_p, squitreason);
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return 0;
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}
|
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|
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/* if nicks erroneous, or too long, kill */
|
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if(!clean_nick(parv[1], 0))
|
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{
|
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bad_nickname(client_p, parv[1]);
|
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return 0;
|
|
}
|
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|
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if(!clean_uid(parv[8], source_p->id))
|
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{
|
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snprintf(squitreason, sizeof squitreason,
|
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"Invalid UID %s for nick %s on %s/%s",
|
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parv[8], parv[1], source_p->name, source_p->id);
|
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exit_client(client_p, client_p, client_p, squitreason);
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return 0;
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}
|
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|
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if(!clean_username(parv[5]) || !clean_host(parv[6]))
|
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{
|
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ServerStats.is_kill++;
|
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sendto_realops_snomask(SNO_DEBUG, L_ALL,
|
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"Bad user@host: %s@%s From: %s(via %s)",
|
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parv[5], parv[6], source_p->name, client_p->name);
|
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sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
|
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return 0;
|
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}
|
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|
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if(strcmp(parv[9], "*") && !clean_host(parv[9]))
|
|
{
|
|
ServerStats.is_kill++;
|
|
sendto_realops_snomask(SNO_DEBUG, L_ALL,
|
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"Bad realhost: %s From: %s(via %s)",
|
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parv[9], source_p->name, client_p->name);
|
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sendto_one(client_p, ":%s KILL %s :%s (Bad user@host)", me.id, parv[8], me.name);
|
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return 0;
|
|
}
|
|
|
|
/* check length of clients gecos */
|
|
if(strlen(parv[11]) > REALLEN)
|
|
{
|
|
char *s = LOCAL_COPY(parv[11]);
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL, "Long realname from server %s for %s",
|
|
source_p->name, parv[1]);
|
|
s[REALLEN] = '\0';
|
|
parv[11] = s;
|
|
}
|
|
|
|
target_p = find_named_client(parv[1]);
|
|
|
|
if(target_p == NULL)
|
|
{
|
|
register_client(client_p, source_p, parv[1], newts, parc, parv);
|
|
}
|
|
else if(IsUnknown(target_p))
|
|
{
|
|
exit_client(NULL, target_p, &me, "Overridden");
|
|
register_client(client_p, source_p, parv[1], newts, parc, parv);
|
|
}
|
|
/* we've got a collision! */
|
|
else
|
|
perform_nick_collides(source_p, client_p, target_p, parc, parv,
|
|
newts, parv[1], parv[8]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ms_save()
|
|
* parv[1] - UID
|
|
* parv[2] - TS
|
|
*/
|
|
static int
|
|
ms_save(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
|
|
{
|
|
struct Client *target_p;
|
|
|
|
target_p = find_id(parv[1]);
|
|
if (target_p == NULL)
|
|
return 0;
|
|
if (!IsPerson(target_p))
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL,
|
|
"Ignored SAVE message for non-person %s from %s",
|
|
target_p->name, source_p->name);
|
|
else if (IsDigit(target_p->name[0]))
|
|
sendto_realops_snomask(SNO_DEBUG, L_ALL,
|
|
"Ignored noop SAVE message for %s from %s",
|
|
target_p->name, source_p->name);
|
|
else if (target_p->tsinfo == atol(parv[2]))
|
|
save_user(client_p, source_p, target_p);
|
|
else
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Ignored SAVE message for %s from %s",
|
|
target_p->name, source_p->name);
|
|
return 0;
|
|
}
|
|
|
|
/* clean_username()
|
|
*
|
|
* input - username to check
|
|
* output - 0 if erroneous, else 0
|
|
* side effects -
|
|
*/
|
|
static int
|
|
clean_username(const char *username)
|
|
{
|
|
int len = 0;
|
|
|
|
for(; *username; username++)
|
|
{
|
|
len++;
|
|
|
|
if(!IsUserChar(*username))
|
|
return 0;
|
|
}
|
|
|
|
if(len > USERLEN)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* clean_host()
|
|
*
|
|
* input - host to check
|
|
* output - 0 if erroneous, else 0
|
|
* side effects -
|
|
*/
|
|
static int
|
|
clean_host(const char *host)
|
|
{
|
|
int len = 0;
|
|
|
|
for(; *host; host++)
|
|
{
|
|
len++;
|
|
|
|
if(!IsHostChar(*host))
|
|
return 0;
|
|
}
|
|
|
|
if(len > HOSTLEN)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
clean_uid(const char *uid, const char *sid)
|
|
{
|
|
int len = 1;
|
|
|
|
if(strncmp(uid, sid, strlen(sid)))
|
|
return 0;
|
|
|
|
if(!IsDigit(*uid++))
|
|
return 0;
|
|
|
|
for(; *uid; uid++)
|
|
{
|
|
len++;
|
|
|
|
if(!IsIdChar(*uid))
|
|
return 0;
|
|
}
|
|
|
|
if(len != IDLEN - 1)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
set_initial_nick(struct Client *client_p, struct Client *source_p, char *nick)
|
|
{
|
|
char note[NICKLEN + 10];
|
|
|
|
/* This had to be copied here to avoid problems.. */
|
|
source_p->tsinfo = rb_current_time();
|
|
if(source_p->name[0])
|
|
del_from_client_hash(source_p->name, source_p);
|
|
|
|
strcpy(source_p->name, nick);
|
|
add_to_client_hash(nick, source_p);
|
|
|
|
snprintf(note, sizeof(note), "Nick: %s", nick);
|
|
rb_note(client_p->localClient->F, note);
|
|
|
|
if(source_p->flags & FLAGS_SENTUSER)
|
|
{
|
|
/* got user, heres nick. */
|
|
register_local_user(client_p, source_p);
|
|
}
|
|
}
|
|
|
|
static void
|
|
change_local_nick(struct Client *client_p, struct Client *source_p,
|
|
char *nick, int dosend)
|
|
{
|
|
struct Client *target_p;
|
|
rb_dlink_node *ptr, *next_ptr;
|
|
struct Channel *chptr;
|
|
char note[NICKLEN + 10];
|
|
int samenick;
|
|
|
|
if (dosend)
|
|
{
|
|
chptr = find_bannickchange_channel(source_p);
|
|
if (chptr != NULL)
|
|
{
|
|
sendto_one_numeric(source_p, ERR_BANNICKCHANGE,
|
|
form_str(ERR_BANNICKCHANGE),
|
|
nick, chptr->chname);
|
|
return;
|
|
}
|
|
if((source_p->localClient->last_nick_change + ConfigFileEntry.max_nick_time) < rb_current_time())
|
|
source_p->localClient->number_of_nick_changes = 0;
|
|
|
|
source_p->localClient->last_nick_change = rb_current_time();
|
|
source_p->localClient->number_of_nick_changes++;
|
|
|
|
if(ConfigFileEntry.anti_nick_flood && !IsOper(source_p) &&
|
|
source_p->localClient->number_of_nick_changes > ConfigFileEntry.max_nick_changes)
|
|
{
|
|
sendto_one(source_p, form_str(ERR_NICKTOOFAST),
|
|
me.name, source_p->name, source_p->name,
|
|
nick, ConfigFileEntry.max_nick_time);
|
|
return;
|
|
}
|
|
}
|
|
|
|
samenick = irccmp(source_p->name, nick) ? 0 : 1;
|
|
|
|
/* dont reset TS if theyre just changing case of nick */
|
|
if(!samenick)
|
|
{
|
|
/* force the TS to increase -- jilles */
|
|
if (source_p->tsinfo >= rb_current_time())
|
|
source_p->tsinfo++;
|
|
else
|
|
source_p->tsinfo = rb_current_time();
|
|
monitor_signoff(source_p);
|
|
/* we only do bancache for local users -- jilles */
|
|
if(source_p->user)
|
|
invalidate_bancache_user(source_p);
|
|
}
|
|
|
|
sendto_realops_snomask(SNO_NCHANGE, L_ALL,
|
|
"Nick change: From %s to %s [%s@%s]",
|
|
source_p->name, nick, source_p->username, source_p->host);
|
|
|
|
/* send the nick change to the users channels */
|
|
sendto_common_channels_local(source_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s",
|
|
source_p->name, source_p->username, source_p->host, nick);
|
|
|
|
/* send the nick change to servers.. */
|
|
if(source_p->user)
|
|
{
|
|
whowas_add_history(source_p, 1);
|
|
|
|
if (dosend)
|
|
{
|
|
sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
|
|
use_id(source_p), nick, (long) source_p->tsinfo);
|
|
}
|
|
}
|
|
|
|
/* Finally, add to hash */
|
|
del_from_client_hash(source_p->name, source_p);
|
|
strcpy(source_p->name, nick);
|
|
add_to_client_hash(nick, source_p);
|
|
|
|
if(!samenick)
|
|
monitor_signon(source_p);
|
|
|
|
/* Make sure everyone that has this client on its accept list
|
|
* loses that reference.
|
|
*/
|
|
/* we used to call del_all_accepts() here, but theres no real reason
|
|
* to clear a clients own list of accepted clients. So just remove
|
|
* them from everyone elses list --anfl
|
|
*/
|
|
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, source_p->on_allow_list.head)
|
|
{
|
|
target_p = ptr->data;
|
|
|
|
rb_dlinkFindDestroy(source_p, &target_p->localClient->allow_list);
|
|
rb_dlinkDestroy(ptr, &source_p->on_allow_list);
|
|
}
|
|
|
|
snprintf(note, sizeof(note), "Nick: %s", nick);
|
|
rb_note(client_p->localClient->F, note);
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* change_remote_nick()
|
|
*/
|
|
static int
|
|
change_remote_nick(struct Client *client_p, struct Client *source_p,
|
|
time_t newts, const char *nick, int dosend)
|
|
{
|
|
struct nd_entry *nd;
|
|
int samenick = irccmp(source_p->name, nick) ? 0 : 1;
|
|
|
|
/* client changing their nick - dont reset ts if its same */
|
|
if(!samenick)
|
|
{
|
|
source_p->tsinfo = newts ? newts : rb_current_time();
|
|
monitor_signoff(source_p);
|
|
}
|
|
|
|
sendto_common_channels_local(source_p, NOCAPS, NOCAPS, ":%s!%s@%s NICK :%s",
|
|
source_p->name, source_p->username, source_p->host, nick);
|
|
|
|
if(source_p->user)
|
|
{
|
|
whowas_add_history(source_p, 1);
|
|
if (dosend)
|
|
{
|
|
sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s NICK %s :%ld",
|
|
use_id(source_p), nick, (long) source_p->tsinfo);
|
|
}
|
|
}
|
|
|
|
del_from_client_hash(source_p->name, source_p);
|
|
|
|
/* invalidate nick delay when a remote client uses the nick.. */
|
|
if((nd = irc_dictionary_retrieve(nd_dict, nick)))
|
|
free_nd_entry(nd);
|
|
|
|
strcpy(source_p->name, nick);
|
|
add_to_client_hash(nick, source_p);
|
|
|
|
if(!samenick)
|
|
monitor_signon(source_p);
|
|
|
|
/* remove all accepts pointing to the client */
|
|
del_all_accepts(source_p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
perform_nick_collides(struct Client *source_p, struct Client *client_p,
|
|
struct Client *target_p, int parc, const char *parv[],
|
|
time_t newts, const char *nick, const char *uid)
|
|
{
|
|
int sameuser;
|
|
int use_save;
|
|
const char *action;
|
|
|
|
use_save = ConfigFileEntry.collision_fnc && can_save(target_p) &&
|
|
uid != NULL && can_save(source_p);
|
|
action = use_save ? "saved" : "killed";
|
|
|
|
/* if we dont have a ts, or their TS's are the same, kill both */
|
|
if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo))
|
|
{
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick collision on %s(%s <- %s)(both %s)",
|
|
target_p->name, target_p->from->name, client_p->name, action);
|
|
|
|
if (use_save)
|
|
{
|
|
save_user(&me, &me, target_p);
|
|
ServerStats.is_save++;
|
|
sendto_one(client_p, ":%s SAVE %s %ld", me.id,
|
|
uid, (long)newts);
|
|
register_client(client_p, source_p,
|
|
uid, SAVE_NICKTS, parc, parv);
|
|
}
|
|
else
|
|
{
|
|
sendto_one_numeric(target_p, ERR_NICKCOLLISION,
|
|
form_str(ERR_NICKCOLLISION), target_p->name);
|
|
|
|
/* if the new client being introduced has a UID, we need to
|
|
* issue a KILL for it..
|
|
*/
|
|
if(uid)
|
|
sendto_one(client_p, ":%s KILL %s :%s (Nick collision (new))",
|
|
me.id, uid, me.name);
|
|
|
|
/* we then need to KILL the old client everywhere */
|
|
kill_client_serv_butone(NULL, target_p, "%s (Nick collision (new))", me.name);
|
|
ServerStats.is_kill++;
|
|
|
|
target_p->flags |= FLAGS_KILLED;
|
|
exit_client(client_p, target_p, &me, "Nick collision (new)");
|
|
}
|
|
return 0;
|
|
}
|
|
/* the timestamps are different */
|
|
else
|
|
{
|
|
sameuser = (target_p->user) && !irccmp(target_p->username, parv[5])
|
|
&& !irccmp(target_p->host, parv[6]);
|
|
|
|
if((sameuser && newts < target_p->tsinfo) ||
|
|
(!sameuser && newts > target_p->tsinfo))
|
|
{
|
|
/* if we have a UID, then we need to issue a KILL,
|
|
* otherwise we do nothing and hope that the other
|
|
* client will collide it..
|
|
*/
|
|
if (use_save)
|
|
{
|
|
sendto_one(client_p, ":%s SAVE %s %ld", me.id,
|
|
uid, (long)newts);
|
|
register_client(client_p, source_p,
|
|
uid, SAVE_NICKTS, parc, parv);
|
|
}
|
|
else if(uid)
|
|
sendto_one(client_p,
|
|
":%s KILL %s :%s (Nick collision (new))",
|
|
me.id, uid, me.name);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
if(sameuser)
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick collision on %s(%s <- %s)(older %s)",
|
|
target_p->name, target_p->from->name,
|
|
client_p->name, action);
|
|
else
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick collision on %s(%s <- %s)(newer %s)",
|
|
target_p->name, target_p->from->name,
|
|
client_p->name, action);
|
|
|
|
if (use_save)
|
|
{
|
|
ServerStats.is_save++;
|
|
save_user(&me, &me, target_p);
|
|
}
|
|
else
|
|
{
|
|
ServerStats.is_kill++;
|
|
sendto_one_numeric(target_p, ERR_NICKCOLLISION,
|
|
form_str(ERR_NICKCOLLISION), target_p->name);
|
|
|
|
/* now we just need to kill the existing client */
|
|
kill_client_serv_butone(client_p, target_p,
|
|
"%s (Nick collision (new))", me.name);
|
|
|
|
target_p->flags |= FLAGS_KILLED;
|
|
(void) exit_client(client_p, target_p, &me, "Nick collision");
|
|
}
|
|
|
|
register_client(client_p, source_p,
|
|
nick, newts, parc, parv);
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
perform_nickchange_collides(struct Client *source_p, struct Client *client_p,
|
|
struct Client *target_p, int parc,
|
|
const char *parv[], time_t newts, const char *nick)
|
|
{
|
|
int sameuser;
|
|
int use_save;
|
|
const char *action;
|
|
|
|
use_save = ConfigFileEntry.collision_fnc && can_save(target_p) &&
|
|
can_save(source_p);
|
|
action = use_save ? "saved" : "killed";
|
|
|
|
/* its a client changing nick and causing a collide */
|
|
if(!newts || !target_p->tsinfo || (newts == target_p->tsinfo) || !source_p->user)
|
|
{
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick change collision from %s to %s(%s <- %s)(both %s)",
|
|
source_p->name, target_p->name, target_p->from->name,
|
|
client_p->name, action);
|
|
|
|
if (use_save)
|
|
{
|
|
ServerStats.is_save += 2;
|
|
save_user(&me, &me, target_p);
|
|
sendto_one(client_p, ":%s SAVE %s %ld", me.id,
|
|
source_p->id, (long)newts);
|
|
/* don't send a redundant nick change */
|
|
if (!IsDigit(source_p->name[0]))
|
|
change_remote_nick(client_p, source_p, SAVE_NICKTS, source_p->id, 1);
|
|
}
|
|
else
|
|
{
|
|
ServerStats.is_kill++;
|
|
sendto_one_numeric(target_p, ERR_NICKCOLLISION,
|
|
form_str(ERR_NICKCOLLISION), target_p->name);
|
|
|
|
kill_client_serv_butone(NULL, source_p, "%s (Nick change collision)", me.name);
|
|
|
|
ServerStats.is_kill++;
|
|
|
|
kill_client_serv_butone(NULL, target_p, "%s (Nick change collision)", me.name);
|
|
|
|
target_p->flags |= FLAGS_KILLED;
|
|
exit_client(NULL, target_p, &me, "Nick collision(new)");
|
|
source_p->flags |= FLAGS_KILLED;
|
|
exit_client(client_p, source_p, &me, "Nick collision(old)");
|
|
}
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
sameuser = !irccmp(target_p->username, source_p->username) &&
|
|
!irccmp(target_p->host, source_p->host);
|
|
|
|
if((sameuser && newts < target_p->tsinfo) ||
|
|
(!sameuser && newts > target_p->tsinfo))
|
|
{
|
|
if(sameuser)
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick change collision from %s to %s(%s <- %s)(older %s)",
|
|
source_p->name, target_p->name,
|
|
target_p->from->name, client_p->name, action);
|
|
else
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick change collision from %s to %s(%s <- %s)(newer %s)",
|
|
source_p->name, target_p->name,
|
|
target_p->from->name, client_p->name, action);
|
|
|
|
if (use_save)
|
|
{
|
|
ServerStats.is_save++;
|
|
/* can't broadcast a SAVE because the
|
|
* nickchange has happened at client_p
|
|
* but not in other directions -- jilles */
|
|
sendto_one(client_p, ":%s SAVE %s %ld", me.id,
|
|
source_p->id, (long)newts);
|
|
/* send a :<id> NICK <id> <ts> (!) */
|
|
if (!IsDigit(source_p->name[0]))
|
|
change_remote_nick(client_p, source_p, SAVE_NICKTS, source_p->id, 1);
|
|
}
|
|
else
|
|
{
|
|
ServerStats.is_kill++;
|
|
|
|
sendto_one_numeric(source_p, ERR_NICKCOLLISION,
|
|
form_str(ERR_NICKCOLLISION), source_p->name);
|
|
|
|
/* kill the client issuing the nickchange */
|
|
kill_client_serv_butone(client_p, source_p,
|
|
"%s (Nick change collision)", me.name);
|
|
|
|
source_p->flags |= FLAGS_KILLED;
|
|
|
|
if(sameuser)
|
|
exit_client(client_p, source_p, &me, "Nick collision(old)");
|
|
else
|
|
exit_client(client_p, source_p, &me, "Nick collision(new)");
|
|
}
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
if(sameuser)
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick collision on %s(%s <- %s)(older %s)",
|
|
target_p->name, target_p->from->name,
|
|
client_p->name, action);
|
|
else
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Nick collision on %s(%s <- %s)(newer %s)",
|
|
target_p->name, target_p->from->name,
|
|
client_p->name, action);
|
|
|
|
if (use_save)
|
|
{
|
|
ServerStats.is_save++;
|
|
save_user(&me, &me, target_p);
|
|
}
|
|
else
|
|
{
|
|
sendto_one_numeric(target_p, ERR_NICKCOLLISION,
|
|
form_str(ERR_NICKCOLLISION), target_p->name);
|
|
|
|
/* kill the client who existed before hand */
|
|
kill_client_serv_butone(client_p, target_p, "%s (Nick collision)", me.name);
|
|
|
|
ServerStats.is_kill++;
|
|
|
|
target_p->flags |= FLAGS_KILLED;
|
|
(void) exit_client(client_p, target_p, &me, "Nick collision");
|
|
}
|
|
}
|
|
}
|
|
|
|
change_remote_nick(client_p, source_p, newts, nick, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
register_client(struct Client *client_p, struct Client *server,
|
|
const char *nick, time_t newts, int parc, const char *parv[])
|
|
{
|
|
struct Client *source_p;
|
|
struct User *user;
|
|
struct nd_entry *nd;
|
|
const char *m;
|
|
int flag;
|
|
|
|
source_p = make_client(client_p);
|
|
user = make_user(source_p);
|
|
rb_dlinkAddTail(source_p, &source_p->node, &global_client_list);
|
|
|
|
source_p->hopcount = atoi(parv[2]);
|
|
source_p->tsinfo = newts;
|
|
|
|
strcpy(source_p->name, nick);
|
|
rb_strlcpy(source_p->username, parv[5], sizeof(source_p->username));
|
|
rb_strlcpy(source_p->host, parv[6], sizeof(source_p->host));
|
|
rb_strlcpy(source_p->orighost, source_p->host, sizeof(source_p->orighost));
|
|
|
|
if(parc == 12)
|
|
{
|
|
rb_strlcpy(source_p->info, parv[11], sizeof(source_p->info));
|
|
rb_strlcpy(source_p->sockhost, parv[7], sizeof(source_p->sockhost));
|
|
rb_strlcpy(source_p->id, parv[8], sizeof(source_p->id));
|
|
add_to_id_hash(source_p->id, source_p);
|
|
if (strcmp(parv[9], "*"))
|
|
{
|
|
rb_strlcpy(source_p->orighost, parv[9], sizeof(source_p->orighost));
|
|
if (irccmp(source_p->host, source_p->orighost))
|
|
SetDynSpoof(source_p);
|
|
}
|
|
if (strcmp(parv[10], "*"))
|
|
rb_strlcpy(source_p->user->suser, parv[10], sizeof(source_p->user->suser));
|
|
}
|
|
else if(parc == 10)
|
|
{
|
|
rb_strlcpy(source_p->info, parv[9], sizeof(source_p->info));
|
|
rb_strlcpy(source_p->sockhost, parv[7], sizeof(source_p->sockhost));
|
|
rb_strlcpy(source_p->id, parv[8], sizeof(source_p->id));
|
|
add_to_id_hash(source_p->id, source_p);
|
|
}
|
|
else
|
|
{
|
|
s_assert(0);
|
|
}
|
|
|
|
/* remove any nd entries for this nick */
|
|
if((nd = irc_dictionary_retrieve(nd_dict, nick)))
|
|
free_nd_entry(nd);
|
|
|
|
add_to_client_hash(nick, source_p);
|
|
add_to_hostname_hash(source_p->orighost, source_p);
|
|
monitor_signon(source_p);
|
|
|
|
m = &parv[4][1];
|
|
while(*m)
|
|
{
|
|
flag = user_modes[(unsigned char) *m];
|
|
|
|
if(flag & UMODE_SERVICE)
|
|
{
|
|
int hit = 0;
|
|
rb_dlink_node *ptr;
|
|
|
|
RB_DLINK_FOREACH(ptr, service_list.head)
|
|
{
|
|
if(!irccmp((const char *) ptr->data, server->name))
|
|
{
|
|
hit++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!hit)
|
|
{
|
|
m++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* increment +i count if theyre invis */
|
|
if(!(source_p->umodes & UMODE_INVISIBLE) && (flag & UMODE_INVISIBLE))
|
|
Count.invisi++;
|
|
|
|
/* increment opered count if theyre opered */
|
|
if(!(source_p->umodes & UMODE_OPER) && (flag & UMODE_OPER))
|
|
Count.oper++;
|
|
|
|
source_p->umodes |= flag;
|
|
m++;
|
|
}
|
|
|
|
if(IsOper(source_p) && !IsService(source_p))
|
|
rb_dlinkAddAlloc(source_p, &oper_list);
|
|
|
|
SetRemoteClient(source_p);
|
|
|
|
if(++Count.total > Count.max_tot)
|
|
Count.max_tot = Count.total;
|
|
|
|
source_p->servptr = server;
|
|
|
|
rb_dlinkAdd(source_p, &source_p->lnode, &source_p->servptr->serv->users);
|
|
|
|
call_hook(h_new_remote_user, source_p);
|
|
|
|
return (introduce_client(client_p, source_p, user, nick, parc == 12));
|
|
}
|
|
|
|
/* Check if we can do SAVE. target_p can be a client to save or a
|
|
* server introducing a client -- jilles */
|
|
static int
|
|
can_save(struct Client *target_p)
|
|
{
|
|
struct Client *serv_p;
|
|
|
|
if (MyClient(target_p))
|
|
return 1;
|
|
if (!has_id(target_p))
|
|
return 0;
|
|
serv_p = IsServer(target_p) ? target_p : target_p->servptr;
|
|
while (serv_p != NULL && serv_p != &me)
|
|
{
|
|
if (!(serv_p->serv->caps & CAP_SAVE))
|
|
return 0;
|
|
serv_p = serv_p->servptr;
|
|
}
|
|
return serv_p == &me;
|
|
}
|
|
|
|
static void
|
|
save_user(struct Client *client_p, struct Client *source_p,
|
|
struct Client *target_p)
|
|
{
|
|
if (!MyConnect(target_p) && (!has_id(target_p) || !IsCapable(target_p->from, CAP_SAVE)))
|
|
{
|
|
/* This shouldn't happen */
|
|
/* Note we only need SAVE support in this direction */
|
|
sendto_realops_snomask(SNO_GENERAL, L_ALL,
|
|
"Killed %s!%s@%s for nick collision detected by %s (%s does not support SAVE)",
|
|
target_p->name, target_p->username, target_p->host, source_p->name, target_p->from->name);
|
|
kill_client_serv_butone(NULL, target_p, "%s (Nick collision (no SAVE support))", me.name);
|
|
ServerStats.is_kill++;
|
|
|
|
target_p->flags |= FLAGS_KILLED;
|
|
(void) exit_client(NULL, target_p, &me, "Nick collision (no SAVE support)");
|
|
return;
|
|
}
|
|
sendto_server(client_p, NULL, CAP_SAVE|CAP_TS6, NOCAPS, ":%s SAVE %s %ld",
|
|
source_p->id, target_p->id, (long)target_p->tsinfo);
|
|
sendto_server(client_p, NULL, CAP_TS6, CAP_SAVE, ":%s NICK %s :%ld",
|
|
target_p->id, target_p->id, (long)SAVE_NICKTS);
|
|
if (!IsMe(client_p))
|
|
sendto_realops_snomask(SNO_SKILL, L_ALL,
|
|
"Received SAVE message for %s from %s",
|
|
target_p->name, source_p->name);
|
|
if (MyClient(target_p))
|
|
{
|
|
sendto_one_numeric(target_p, RPL_SAVENICK,
|
|
form_str(RPL_SAVENICK), target_p->id);
|
|
change_local_nick(target_p, target_p, target_p->id, 0);
|
|
target_p->tsinfo = SAVE_NICKTS;
|
|
}
|
|
else
|
|
change_remote_nick(target_p, target_p, SAVE_NICKTS, target_p->id, 0);
|
|
}
|
|
|
|
static void bad_nickname(struct Client *client_p, const char *nick)
|
|
{
|
|
char squitreason[100];
|
|
|
|
sendto_wallops_flags(UMODE_WALLOP, &me,
|
|
"Squitting %s because of bad nickname %s (NICKLEN mismatch?)",
|
|
client_p->name, nick);
|
|
sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
|
|
":%s WALLOPS :Squitting %s because of bad nickname %s (NICKLEN mismatch?)",
|
|
me.id, client_p->name, nick);
|
|
ilog(L_SERVER, "Link %s cancelled, bad nickname %s sent (NICKLEN mismatch?)",
|
|
client_p->name, nick);
|
|
|
|
snprintf(squitreason, sizeof squitreason,
|
|
"Bad nickname introduced [%s]", nick);
|
|
exit_client(client_p, client_p, &me, squitreason);
|
|
}
|