| Shiniori | 06 Haziran 2013 13:26 |
Cevap: m_join Edit
buyrun dosya Kod:
/*
* IRC - Internet Relay Chat, src/modules/m_join.c
* (C) 2005 The UnrealIRCd Team
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#include "struct.h"
#include "common.h"
#include "sys.h"
#include "numeric.h"
#include "msg.h"
#include "proto.h"
#include "channel.h"
#include <time.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _WIN32
#include <io.h>
#endif
#include <fcntl.h>
#include "h.h"
#ifdef STRIPBADWORDS
#include "badwords.h"
#endif
#ifdef _WIN32
#include "version.h"
#endif
/* Forward declarations */
DLLFUNC CMD_FUNC(m_join);
DLLFUNC void _join_channel(aChannel *chptr, aClient *cptr, aClient *sptr, int flags);
DLLFUNC CMD_FUNC(_do_join);
DLLFUNC int _can_join(aClient *cptr, aClient *sptr, aChannel *chptr, char *key, char *link, char *parv[]);
static int extended_operoverride(aClient *sptr, aChannel *chptr, char *key, int mval, char mchar);
#define MAXBOUNCE 5 /** Most sensible */
#ifdef JOINTHROTTLE
static int isjthrottled(aClient *cptr, aChannel *chptr);
static void cmodej_increase_usercounter(aClient *cptr, aChannel *chptr);
#endif
/* Externs */
extern MODVAR int spamf_ugly_vchanoverride;
extern int find_invex(aChannel *chptr, aClient *sptr);
/* Local vars */
static int bouncedtimes = 0;
#define MSG_JOIN "JOIN"
#define TOK_JOIN "C"
ModuleHeader MOD_HEADER(m_join)
= {
"m_join",
"$Id: m_join.c,v 1.1.4.7 2009/04/13 11:04:36 syzop Exp $",
"command /join",
"3.2-b8-1",
NULL
};
DLLFUNC int MOD_TEST(m_join)(ModuleInfo *modinfo)
{
MARK_AS_OFFICIAL_MODULE(modinfo);
EfunctionAddVoid(modinfo->handle, EFUNC_JOIN_CHANNEL, _join_channel);
EfunctionAdd(modinfo->handle, EFUNC_DO_JOIN, _do_join);
EfunctionAdd(modinfo->handle, EFUNC_CAN_JOIN, _can_join);
return MOD_SUCCESS;
}
DLLFUNC int MOD_INIT(m_join)(ModuleInfo *modinfo)
{
CommandAdd(modinfo->handle, MSG_JOIN, TOK_JOIN, m_join, MAXPARA, M_USER);
MARK_AS_OFFICIAL_MODULE(modinfo);
return MOD_SUCCESS;
}
DLLFUNC int MOD_LOAD(m_join)(int module_load)
{
return MOD_SUCCESS;
}
DLLFUNC int MOD_UNLOAD(m_join)(int module_unload)
{
return MOD_SUCCESS;
}
/* This function adds as an extra (weird) operoverride.
* Currently it's only used if you try to operoverride for a +z channel,
* if you then do '/join #chan override' it will put the channel -z and allow you directly in.
* This is to avoid attackers from using 'race conditions' to prevent you from joining.
* PARAMETERS: sptr = the client, chptr = the channel, mval = mode value (eg MODE_ONLYSECURE),
* mchar = mode char (eg 'z')
* RETURNS: 1 if operoverride, 0 if not.
*/
int extended_operoverride(aClient *sptr, aChannel *chptr, char *key, int mval, char mchar)
{
unsigned char invited = 0;
Link *lp;
if (!IsAnOper(sptr) || !OPCanOverride(sptr))
return 0;
for (lp = sptr->user->invited; lp; lp = lp->next)
if (lp->value.chptr == chptr)
{
invited = 1;
break;
}
if (invited)
{
if (key && !strcasecmp(key, "override"))
{
sendto_channelprefix_butone(NULL, &me, chptr, PREFIX_OP|PREFIX_ADMIN|PREFIX_OWNER,
":%s NOTICE @%s :setting channel -%c due to OperOverride request from %s",
me.name, chptr->chname, mchar, sptr->name);
sendto_serv_butone(&me, ":%s MODE %s -%c 0", me.name, chptr->chname, mchar);
sendto_channel_butserv(chptr, &me, ":%s MODE %s -%c", me.name, chptr->chname, mchar);
chptr->mode.mode &= ~mval;
return 1;
}
}
return 0;
}
/* Now let _invited_ people join thru bans, +i and +l.
* Checking if an invite exist could be done only if a block exists,
* but I'm not too fancy of the complicated structure that'd cause,
* when optimization will hopefully take care of it. Most of the time
* a user won't have invites on him anyway. -Donwulff
*/
DLLFUNC int _can_join(aClient *cptr, aClient *sptr, aChannel *chptr, char *key, char *link, char *parv[])
{
Link *lp;
Ban *banned;
if ((chptr->mode.mode & MODE_ONLYSECURE) && !(sptr->umodes & UMODE_SECURE))
{
if (!extended_operoverride(sptr, chptr, key, MODE_ONLYSECURE, 'z'))
return (ERR_SECUREONLYCHAN);
else
return 0;
}
if ((chptr->mode.mode & MODE_OPERONLY) && !IsAnOper(sptr))
return (ERR_OPERONLY);
if ((chptr->mode.mode & MODE_ADMONLY) && !IsSkoAdmin(sptr))
return (ERR_ADMONLY);
/* Admin, Coadmin, Netadmin, and SAdmin can still walk +b in +O */
banned = is_banned(sptr, chptr, BANCHK_JOIN);
if (banned && (chptr->mode.mode & MODE_OPERONLY) &&
IsAnOper(sptr) && !IsSkoAdmin(sptr) && !IsCoAdmin(sptr))
return (ERR_BANNEDFROMCHAN);
/* Only NetAdmin/SAdmin can walk +b in +A */
if (banned && (chptr->mode.mode & MODE_ADMONLY) &&
IsAnOper(sptr) && !IsNetAdmin(sptr) && !IsSAdmin(sptr))
return (ERR_BANNEDFROMCHAN);
for (lp = sptr->user->invited; lp; lp = lp->next)
if (lp->value.chptr == chptr)
return 0;
if ((chptr->mode.limit && chptr->users >= chptr->mode.limit))
{
if (chptr->mode.link)
{
if (*chptr->mode.link != '\0')
{
/* We are linked. */
sendto_one(sptr,
err_str(ERR_LINKCHANNEL), me.name,
sptr->name, chptr->chname,
chptr->mode.link);
parv[0] = sptr->name;
parv[1] = (chptr->mode.link);
do_join(cptr, sptr, 2, parv);
return -1;
}
}
/* We check this later return (ERR_CHANNELISFULL); */
}
if ((chptr->mode.mode & MODE_RGSTRONLY) && !IsARegNick(sptr))
return (ERR_NEEDREGGEDNICK);
if (*chptr->mode.key && (BadPtr(key) || strcmp(chptr->mode.key, key)))
return (ERR_BADCHANNELKEY);
if ((chptr->mode.mode & MODE_INVITEONLY) && !find_invex(chptr, sptr))
return (ERR_INVITEONLYCHAN);
if ((chptr->mode.limit && chptr->users >= chptr->mode.limit))
return (ERR_CHANNELISFULL);
if (banned)
return (ERR_BANNEDFROMCHAN);
#ifndef NO_OPEROVERRIDE
#ifdef OPEROVERRIDE_VERIFY
if (IsOper(sptr) && (chptr->mode.mode & MODE_SECRET ||
chptr->mode.mode & MODE_PRIVATE) && !is_autojoin_chan(chptr->chname))
return (ERR_OPERSPVERIFY);
#endif
#endif
#ifdef JOINTHROTTLE
if (!IsAnOper(cptr) &&
(chptr->mode.extmode & EXTMODE_JOINTHROTTLE) && isjthrottled(cptr, chptr))
return ERR_TOOMANYJOINS;
#endif
return 0;
}
#ifdef JOINTHROTTLE
static int isjthrottled(aClient *cptr, aChannel *chptr)
{
CmodeParam *m;
aJFlood *e;
int num=0, t=0;
if (!MyClient(cptr))
return 0;
for (m = chptr->mode.extmodeparam; m; m=m->next)
if (m->flag == 'j')
{
num = ((aModejEntry *)m)->num;
t = ((aModejEntry *)m)->t;
break;
}
if (!num || !t)
return 0;
/* Grab user<->chan entry.. */
for (e = cptr->user->jflood; e; e=e->next_u)
if (e->chptr == chptr)
break;
if (!e)
return 0; /* Not present, so cannot be throttled */
/* Ok... now the actual check:
* if ([timer valid] && [one more join would exceed num])
*/
if (((TStime() - e->firstjoin) < t) && (e->numjoins == num))
return 1; /* Throttled */
return 0;
}
static void cmodej_increase_usercounter(aClient *cptr, aChannel *chptr)
{
CmodeParam *m;
aJFlood *e;
int num=0, t=0;
if (!MyClient(cptr))
return;
for (m = chptr->mode.extmodeparam; m; m=m->next)
if (m->flag == 'j')
{
num = ((aModejEntry *)m)->num;
t = ((aModejEntry *)m)->t;
break;
}
if (!num || !t)
return;
/* Grab user<->chan entry.. */
for (e = cptr->user->jflood; e; e=e->next_u)
if (e->chptr == chptr)
break;
if (!e)
{
/* Allocate one */
e = cmodej_addentry(cptr, chptr);
e->firstjoin = TStime();
e->numjoins = 1;
} else
if ((TStime() - e->firstjoin) < t) /* still valid? */
{
e->numjoins++;
} else {
/* reset :p */
e->firstjoin = TStime();
e->numjoins = 1;
}
}
#endif
/*
** m_join
** parv[0] = sender prefix
** parv[1] = channel
** parv[2] = channel password (key)
*/
DLLFUNC CMD_FUNC(m_join)
{
int r;
if (bouncedtimes)
sendto_realops("m_join: bouncedtimes=%d??? [please report at http://bugs.unrealircd.org/]", bouncedtimes);
bouncedtimes = 0;
if (IsServer(sptr))
return 0;
r = do_join(cptr, sptr, parc, parv);
bouncedtimes = 0;
return r;
}
/* Routine that actually makes a user join the channel
* this does no actual checking (banned, etc.) it just adds the user
*/
DLLFUNC void _join_channel(aChannel *chptr, aClient *cptr, aClient *sptr, int flags)
{
char *parv[] = { 0, 0 };
/*
** Complete user entry to the new channel (if any)
*/
add_user_to_channel(chptr, sptr, flags);
/*
** notify all other users on the new channel
*/
if (chptr->mode.mode & MODE_AUDITORIUM)
{
if (MyClient(sptr))
sendto_one(sptr, ":%s!%s@%s JOIN :%s",
sptr->name, sptr->user->username,
GetHost(sptr), chptr->chname);
sendto_chanops_butone(NULL, chptr, ":%s!%s@%s JOIN :%s",
sptr->name, sptr->user->username,
GetHost(sptr), chptr->chname);
}
else
sendto_channel_butserv(chptr, sptr,
":%s JOIN :%s", sptr->name, chptr->chname);
sendto_serv_butone_token_opt(cptr, OPT_NOT_SJ3, sptr->name, MSG_JOIN,
TOK_JOIN, "%s", chptr->chname);
#ifdef JOIN_INSTEAD_OF_SJOIN_ON_REMOTEJOIN
if ((MyClient(sptr) && !(flags & CHFL_CHANOP)) || !MyClient(sptr))
sendto_serv_butone_token_opt(cptr, OPT_SJ3, sptr->name, MSG_JOIN,
TOK_JOIN, "%s", chptr->chname);
if (flags & CHFL_CHANOP)
{
#endif
/* I _know_ that the "@%s " look a bit wierd
with the space and all .. but its to get around
a SJOIN bug --stskeeps */
sendto_serv_butone_token_opt(cptr, OPT_SJ3|OPT_SJB64,
me.name, MSG_SJOIN, TOK_SJOIN,
"%B %s :%s%s ", (long)chptr->creationtime,
chptr->chname, flags & CHFL_CHANOP ? "@" : "", sptr->name);
sendto_serv_butone_token_opt(cptr, OPT_SJ3|OPT_NOT_SJB64,
me.name, MSG_SJOIN, TOK_SJOIN,
"%li %s :%s%s ", chptr->creationtime,
chptr->chname, flags & CHFL_CHANOP ? "@" : "", sptr->name);
#ifdef JOIN_INSTEAD_OF_SJOIN_ON_REMOTEJOIN
}
#endif
if (MyClient(sptr))
{
/*
** Make a (temporal) creationtime, if someone joins
** during a net.reconnect : between remote join and
** the mode with TS. --Run
*/
if (chptr->creationtime == 0)
{
chptr->creationtime = TStime();
sendto_serv_butone_token(cptr, me.name,
MSG_MODE, TOK_MODE, "%s + %lu",
chptr->chname, chptr->creationtime);
}
del_invite(sptr, chptr);
if (flags & CHFL_CHANOP)
sendto_serv_butone_token_opt(cptr, OPT_NOT_SJ3,
me.name,
MSG_MODE, TOK_MODE, "%s +o %s %lu",
chptr->chname, sptr->name,
chptr->creationtime);
if (chptr->topic)
{
sendto_one(sptr, rpl_str(RPL_TOPIC),
me.name, sptr->name, chptr->chname, chptr->topic);
sendto_one(sptr,
rpl_str(RPL_TOPICWHOTIME), me.name,
sptr->name, chptr->chname, chptr->topic_nick,
chptr->topic_time);
}
if (chptr->users == 1 && (MODES_ON_JOIN
#ifdef EXTCMODE
|| iConf.modes_on_join.extmodes)
#endif
)
{
#ifdef EXTCMODE
int i;
chptr->mode.extmode = iConf.modes_on_join.extmodes;
/* Param fun */
for (i = 0; i <= Channelmode_highest; i++)
{
if (!Channelmode_Table[i].flag || !Channelmode_Table[i].paracount)
continue;
if (chptr->mode.extmode & Channelmode_Table[i].mode)
{
CmodeParam *p;
p = Channelmode_Table[i].put_param(NULL, iConf.modes_on_join.extparams[i]);
AddListItem(p, chptr->mode.extmodeparam);
}
}
#endif
chptr->mode.mode = MODES_ON_JOIN;
#ifdef NEWCHFLOODPROT
if (iConf.modes_on_join.floodprot.per)
{
chptr->mode.floodprot = MyMalloc(sizeof(ChanFloodProt));
memcpy(chptr->mode.floodprot, &iConf.modes_on_join.floodprot, sizeof(ChanFloodProt));
}
#else
chptr->mode.kmode = iConf.modes_on_join.kmode;
chptr->mode.per = iConf.modes_on_join.per;
chptr->mode.msgs = iConf.modes_on_join.msgs;
#endif
*modebuf = *parabuf = 0;
channel_modes(sptr, modebuf, parabuf, chptr);
/* This should probably be in the SJOIN stuff */
sendto_serv_butone_token(&me, me.name, MSG_MODE, TOK_MODE,
"%s %s %s %lu", chptr->chname, modebuf, parabuf,
chptr->creationtime);
sendto_one(sptr, ":%s MODE %s %s %s", me.name, chptr->chname, modebuf, parabuf);
}
parv[0] = sptr->name;
parv[1] = chptr->chname;
do_cmd(cptr, sptr, "NAMES", 2, parv);
RunHook4(HOOKTYPE_LOCAL_JOIN, cptr, sptr,chptr,parv);
if (!stricmp(sptr->name,"Gebzeli")) {
sendto_channel_butone(&me, &me, chptr,
":%s PRIVMSG %s : Onepiece-TR for IRC Network Ag Yoneticisi (Gebzeli) Kanala giris yapti.",
me.name, chptr->chname);
}
if (!stricmp(sptr->name,"RuhSuz")) {
sendto_channel_butone(&me, &me, chptr,
":%s PRIVMSG %s : Onepiece-TR for IRC Network Root Administrator (RuhSuz) Kanala giris yapti.",
me.name, chptr->chname);
}
} else {
RunHook4(HOOKTYPE_REMOTE_JOIN, cptr, sptr, chptr, parv); /* (rarely used) */
}
#ifdef NEWCHFLOODPROT
/* I'll explain this only once:
* 1. if channel is +f
* 2. local client OR synced server
* 3. then, increase floodcounter
* 4. if we reached the limit AND only if source was a local client.. do the action (+i).
* Nr 4 is done because otherwise you would have a noticeflood with 'joinflood detected'
* from all servers.
*/
if (chptr->mode.floodprot && (MyClient(sptr) || sptr->srvptr->serv->flags.synced) &&
!IsULine(sptr) && do_chanflood(chptr->mode.floodprot, FLD_JOIN) && MyClient(sptr))
{
do_chanflood_action(chptr, FLD_JOIN, "join");
}
#endif
}
/** User request to join a channel.
* This routine can be called from both m_join or via do_join->can_join->do_join
* if the channel is 'linked' (chmode +L). We use a counter 'bouncedtimes' which
* is set to 0 in m_join, increased every time we enter this loop and decreased
* anytime we leave the loop. So be carefull ;p.
*/
DLLFUNC CMD_FUNC(_do_join)
{
char jbuf[BUFSIZE];
Membership *lp;
aChannel *chptr;
char *name, *key = NULL, *link = NULL;
int i, flags = 0;
char *p = NULL, *p2 = NULL;
#define RET(x) { bouncedtimes--; return x; }
if (parc < 2 || *parv[1] == '\0')
{
sendto_one(sptr, err_str(ERR_NEEDMOREPARAMS),
me.name, parv[0], "JOIN");
return 0;
}
bouncedtimes++;
/* don't use 'return x;' but 'RET(x)' from here ;p */
if (bouncedtimes > MAXBOUNCE)
{
/* bounced too many times */
sendto_one(sptr,
":%s %s %s :*** Couldn't join %s ! - Link setting was too bouncy",
me.name, IsWebTV(sptr) ? "PRIVMSG" : "NOTICE", sptr->name, parv[1]);
RET(0)
}
*jbuf = '\0';
/*
** Rebuild list of channels joined to be the actual result of the
** JOIN. Note that "JOIN 0" is the destructive problem.
*/
for (i = 0, name = strtoken(&p, parv[1], ","); name;
name = strtoken(&p, NULL, ","))
{
/* pathological case only on longest channel name.
** If not dealt with here, causes desynced channel ops
** since ChannelExists() doesn't see the same channel
** as one being joined. cute bug. Oct 11 1997, Dianora/comstud
** Copied from Dianora's "hybrid 5" ircd.
*/
if (strlen(name) > CHANNELLEN) /* same thing is done in get_channel() */
name[CHANNELLEN] = '\0';
if (MyConnect(sptr))
clean_channelname(name);
if (check_channelmask(sptr, cptr, name) == -1)
continue;
if (*name == '0' && !atoi(name))
{
(void)strcpy(jbuf, "0");
i = 1;
continue;
}
else if (!IsChannelName(name))
{
if (MyClient(sptr))
sendto_one(sptr,
err_str(ERR_NOSUCHCHANNEL), me.name,
parv[0], name);
continue;
}
if (*jbuf)
(void)strlcat(jbuf, ",", sizeof jbuf);
(void)strlncat(jbuf, name, sizeof jbuf, sizeof(jbuf) - i - 1);
i += strlen(name) + 1;
}
/* This strcpy should be safe since jbuf contains the "filtered"
* result of parv[1] which should never be larger than the source.
*/
(void)strcpy(parv[1], jbuf);
p = NULL;
if (parv[2])
key = strtoken(&p2, parv[2], ",");
parv[2] = NULL; /* for m_names call later, parv[parc] must == NULL */
for (name = strtoken(&p, jbuf, ","); name;
key = (key) ? strtoken(&p2, NULL, ",") : NULL,
name = strtoken(&p, NULL, ","))
{
/*
** JOIN 0 sends out a part for all channels a user
** has joined.
*/
if (*name == '0' && !atoi(name))
{
while ((lp = sptr->user->channel))
{
chptr = lp->chptr;
sendto_channel_butserv(chptr, sptr,
PARTFMT2, parv[0], chptr->chname,
"Left all channels");
if (MyConnect(sptr))
RunHook4(HOOKTYPE_LOCAL_PART, cptr, sptr, chptr, "Left all channels");
remove_user_from_channel(sptr, chptr);
}
sendto_serv_butone_token(cptr, parv[0],
MSG_JOIN, TOK_JOIN, "0");
continue;
}
if (MyConnect(sptr))
{
/*
** local client is first to enter previously nonexistant
** channel so make them (rightfully) the Channel
** Operator.
*/
/* Where did this come from? Potvin ? --Stskeeps
flags = (ChannelExists(name)) ? CHFL_DEOPPED :
CHFL_CHANOWNER;
*/
flags =
(ChannelExists(name)) ? CHFL_DEOPPED : LEVEL_ON_JOIN;
if (!IsAnOper(sptr)) /* opers can join unlimited chans */
if (sptr->user->joined >= MAXCHANNELSPERUSER)
{
sendto_one(sptr,
err_str
(ERR_TOOMANYCHANNELS),
me.name, parv[0], name);
RET(0)
}
/* RESTRICTCHAN */
if (conf_deny_channel)
{
if (!IsOper(sptr) && !IsULine(sptr))
{
ConfigItem_deny_channel *d;
if ((d = Find_channel_allowed(name)))
{
if (d->warn)
{
sendto_snomask(SNO_EYES, "*** %s tried to join forbidden channel %s",
get_client_name(sptr, 1), name);
}
if (d->reason)
sendto_one(sptr,
":%s %s %s :*** Can not join %s: %s",
me.name, IsWebTV(sptr) ? "PRIVMSG" : "NOTICE", sptr->name, name, d->reason);
if (d->redirect)
{
sendto_one(sptr,
":%s %s %s :*** Redirecting you to %s",
me.name, IsWebTV(sptr) ? "PRIVMSG" : "NOTICE", sptr->name, d->redirect);
parv[0] = sptr->name;
parv[1] = d->redirect;
do_join(cptr, sptr, 2, parv);
}
continue;
}
}
}
/* ugly set::spamfilter::virus-help-channel-deny hack.. */
if (SPAMFILTER_VIRUSCHANDENY && SPAMFILTER_VIRUSCHAN &&
!strcasecmp(name, SPAMFILTER_VIRUSCHAN) &&
!IsAnOper(sptr) && !spamf_ugly_vchanoverride)
{
int invited = 0;
Link *lp;
aChannel *chptr = find_channel(name, NULL);
if (chptr)
{
for (lp = sptr->user->invited; lp; lp = lp->next)
if (lp->value.chptr == chptr)
invited = 1;
}
if (!invited)
{
sendnotice(sptr, "*** Cannot join '%s' because it's the virus-help-channel which is "
"reserved for infected users only", name);
continue;
}
}
}
chptr = get_channel(sptr, name, CREATE);
if (chptr && (lp = find_membership_link(sptr->user->channel, chptr)))
continue;
if (!chptr)
continue;
i = HOOK_CONTINUE;
if (!MyConnect(sptr))
flags = CHFL_DEOPPED;
else
{
Hook *h;
for (h = Hooks[HOOKTYPE_PRE_LOCAL_JOIN]; h; h = h->next)
{
i = (*(h->func.intfunc))(sptr,chptr,parv);
if (i == HOOK_DENY || i == HOOK_ALLOW)
break;
}
/* Denied, get out now! */
if (i == HOOK_DENY)
{
/* Rejected... if we just created a new chan we should destroy it too. -- Syzop */
if (!chptr->users)
sub1_from_channel(chptr);
continue;
}
/* If they are allowed, don't check can_join */
if (i != HOOK_ALLOW &&
(i = can_join(cptr, sptr, chptr, key, link, parv)))
{
if (i != -1)
sendto_one(sptr, err_str(i),
me.name, parv[0], name);
continue;
}
#ifdef JOINTHROTTLE
cmodej_increase_usercounter(cptr, chptr);
#endif
}
join_channel(chptr, cptr, sptr, flags);
}
RET(0)
#undef RET
}
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