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construct/modules/core/m_join.c
Jilles Tjoelker b733b9faf4 SJOIN: Fix crash when both mode parameter and UID list are missing. 
Closes #63
2014-08-15 17:10:24 +02:00

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/*
* ircd-ratbox: A slightly useful ircd.
* m_join.c: Joins a channel.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* $Id: m_join.c 3494 2007-05-27 13:07:27Z jilles $
*/
#include "stdinc.h"
#include "channel.h"
#include "client.h"
#include "common.h"
#include "hash.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_serv.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"
#include "chmode.h"
#include "ratelimit.h"
#include "s_assert.h"
static int m_join(struct Client *, struct Client *, int, const char **);
static int ms_join(struct Client *, struct Client *, int, const char **);
static int ms_sjoin(struct Client *, struct Client *, int, const char **);
static int h_can_create_channel;
static int h_channel_join;
struct Message join_msgtab = {
"JOIN", 0, 0, 0, MFLG_SLOW,
{mg_unreg, {m_join, 2}, {ms_join, 2}, mg_ignore, mg_ignore, {m_join, 2}}
};
struct Message sjoin_msgtab = {
"SJOIN", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_ignore, mg_ignore, {ms_sjoin, 4}, mg_ignore, mg_ignore}
};
mapi_clist_av1 join_clist[] = { &join_msgtab, &sjoin_msgtab, NULL };
mapi_hlist_av1 join_hlist[] = {
{ "can_create_channel", &h_can_create_channel },
{ "channel_join", &h_channel_join },
{ NULL, NULL },
};
DECLARE_MODULE_AV1(join, NULL, NULL, join_clist, join_hlist, NULL, "$Revision: 3494 $");
static void do_join_0(struct Client *client_p, struct Client *source_p);
static int check_channel_name_loc(struct Client *source_p, const char *name);
static void send_join_error(struct Client *source_p, int numeric, const char *name);
static void set_final_mode(struct Mode *mode, struct Mode *oldmode);
static void remove_our_modes(struct Channel *chptr, struct Client *source_p);
static void remove_ban_list(struct Channel *chptr, struct Client *source_p,
rb_dlink_list * list, char c, int mems);
static char modebuf[MODEBUFLEN];
static char parabuf[MODEBUFLEN];
static const char *para[MAXMODEPARAMS];
static char *mbuf;
static int pargs;
/* Check what we will forward to, without sending any notices to the user
* -- jilles
*/
static struct Channel *
check_forward(struct Client *source_p, struct Channel *chptr,
char *key, int *err)
{
int depth = 0, i;
const char *next = NULL;
/* The caller (m_join) is only interested in the reason
* for the original channel.
*/
if ((*err = can_join(source_p, chptr, key, &next)) == 0)
return chptr;
/* User is +Q, or forwarding disabled */
if (IsNoForward(source_p) || !ConfigChannel.use_forward)
return NULL;
while (depth < 16)
{
if (next == NULL)
return NULL;
chptr = find_channel(next);
/* Can only forward to existing channels */
if (chptr == NULL)
return NULL;
/* Already on there, show original error message */
if (IsMember(source_p, chptr))
return NULL;
/* Juped. Sending a warning notice would be unfair */
if (hash_find_resv(chptr->chname))
return NULL;
/* Don't forward to +Q channel */
if (chptr->mode.mode & MODE_DISFORWARD)
return NULL;
i = can_join(source_p, chptr, key, &next);
if (i == 0)
return chptr;
depth++;
}
return NULL;
}
/*
* m_join
* parv[1] = channel
* parv[2] = channel password (key)
*/
static int
m_join(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static char jbuf[BUFSIZE];
struct Channel *chptr = NULL, *chptr2 = NULL;
struct ConfItem *aconf;
char *name;
char *key = NULL;
const char *modes;
int i, flags = 0;
char *p = NULL, *p2 = NULL;
char *chanlist;
char *mykey;
jbuf[0] = '\0';
/* rebuild the list of channels theyre supposed to be joining.
* this code has a side effect of losing keys, but..
*/
chanlist = LOCAL_COPY(parv[1]);
for(name = rb_strtok_r(chanlist, ",", &p); name; name = rb_strtok_r(NULL, ",", &p))
{
/* check the length and name of channel is ok */
if(!check_channel_name_loc(source_p, name) || (strlen(name) > LOC_CHANNELLEN))
{
sendto_one_numeric(source_p, ERR_BADCHANNAME,
form_str(ERR_BADCHANNAME), (unsigned char *) name);
continue;
}
/* join 0 parts all channels */
if(*name == '0' && (name[1] == ',' || name[1] == '\0') && name == chanlist)
{
(void) strcpy(jbuf, "0");
continue;
}
/* check it begins with # or &, and local chans are disabled */
else if(!IsChannelName(name) ||
( ConfigChannel.disable_local_channels && name[0] == '&'))
{
sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
form_str(ERR_NOSUCHCHANNEL), name);
continue;
}
/* see if its resv'd */
if(!IsExemptResv(source_p) && (aconf = hash_find_resv(name)))
{
sendto_one_numeric(source_p, ERR_BADCHANNAME,
form_str(ERR_BADCHANNAME), name);
/* dont warn for opers */
if(!IsExemptJupe(source_p) && !IsOper(source_p))
sendto_realops_snomask(SNO_SPY, L_NETWIDE,
"User %s (%s@%s) is attempting to join locally juped channel %s (%s)",
source_p->name, source_p->username,
source_p->orighost, name, aconf->passwd);
/* dont update tracking for jupe exempt users, these
* are likely to be spamtrap leaves
*/
else if(IsExemptJupe(source_p))
aconf->port--;
continue;
}
if(splitmode && !IsOper(source_p) && (*name != '&') &&
ConfigChannel.no_join_on_split)
{
sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
me.name, source_p->name, name);
continue;
}
if(*jbuf)
(void) strcat(jbuf, ",");
(void) rb_strlcat(jbuf, name, sizeof(jbuf));
}
if(parc > 2)
{
mykey = LOCAL_COPY(parv[2]);
key = rb_strtok_r(mykey, ",", &p2);
}
for(name = rb_strtok_r(jbuf, ",", &p); name;
key = (key) ? rb_strtok_r(NULL, ",", &p2) : NULL, name = rb_strtok_r(NULL, ",", &p))
{
hook_data_channel_activity hook_info;
/* JOIN 0 simply parts all channels the user is in */
if(*name == '0' && !atoi(name))
{
if(source_p->user->channel.head == NULL)
continue;
do_join_0(&me, source_p);
continue;
}
/* look for the channel */
if((chptr = find_channel(name)) != NULL)
{
if(IsMember(source_p, chptr))
continue;
flags = 0;
}
else
{
hook_data_client_approval moduledata;
moduledata.client = source_p;
moduledata.approved = 0;
call_hook(h_can_create_channel, &moduledata);
if(moduledata.approved != 0)
{
if(moduledata.approved != ERR_CUSTOM)
send_join_error(source_p,
moduledata.approved,
name);
continue;
}
if(splitmode && !IsOper(source_p) && (*name != '&') &&
ConfigChannel.no_create_on_split)
{
sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
me.name, source_p->name, name);
continue;
}
flags = CHFL_CHANOP;
}
if((rb_dlink_list_length(&source_p->user->channel) >=
(unsigned long) ConfigChannel.max_chans_per_user) &&
(!IsOper(source_p) ||
(rb_dlink_list_length(&source_p->user->channel) >=
(unsigned long) ConfigChannel.max_chans_per_user * 3)))
{
sendto_one(source_p, form_str(ERR_TOOMANYCHANNELS),
me.name, source_p->name, name);
continue;
}
if(chptr == NULL) /* If I already have a chptr, no point doing this */
{
chptr = get_or_create_channel(source_p, name, NULL);
if(chptr == NULL)
{
sendto_one(source_p, form_str(ERR_UNAVAILRESOURCE),
me.name, source_p->name, name);
continue;
}
}
/* If check_forward returns NULL, they couldn't join and there wasn't a usable forward channel. */
if(!(chptr2 = check_forward(source_p, chptr, key, &i)))
{
/* might be wrong, but is there any other better location for such?
* see extensions/chm_operonly.c for other comments on this
* -- dwr
*/
if(i != ERR_CUSTOM)
send_join_error(source_p, i, name);
continue;
}
else if(chptr != chptr2)
sendto_one_numeric(source_p, ERR_LINKCHANNEL, form_str(ERR_LINKCHANNEL), name, chptr2->chname);
chptr = chptr2;
if(flags == 0 &&
!IsOper(source_p) && !IsExemptSpambot(source_p))
check_spambot_warning(source_p, name);
/* add the user to the channel */
add_user_to_channel(chptr, source_p, flags);
if (chptr->mode.join_num &&
rb_current_time() - chptr->join_delta >= chptr->mode.join_time)
{
chptr->join_count = 0;
chptr->join_delta = rb_current_time();
}
chptr->join_count++;
/* credit user for join */
credit_client_join(source_p);
/* we send the user their join here, because we could have to
* send a mode out next.
*/
send_channel_join(chptr, source_p);
/* its a new channel, set +nt and burst. */
if(flags & CHFL_CHANOP)
{
chptr->channelts = rb_current_time();
chptr->mode.mode |= MODE_TOPICLIMIT;
chptr->mode.mode |= MODE_NOPRIVMSGS;
modes = channel_modes(chptr, &me);
sendto_channel_local(ONLY_CHANOPS, chptr, ":%s MODE %s %s",
me.name, chptr->chname, modes);
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s SJOIN %ld %s %s :@%s",
me.id, (long) chptr->channelts,
chptr->chname, modes, source_p->id);
}
else
{
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s JOIN %ld %s +",
use_id(source_p), (long) chptr->channelts,
chptr->chname);
}
del_invite(chptr, source_p);
if(chptr->topic != NULL)
{
sendto_one(source_p, form_str(RPL_TOPIC), me.name,
source_p->name, chptr->chname, chptr->topic);
sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
me.name, source_p->name, chptr->chname,
chptr->topic_info,
(unsigned long)chptr->topic_time);
}
channel_member_names(chptr, source_p, 1);
hook_info.client = source_p;
hook_info.chptr = chptr;
hook_info.key = key;
call_hook(h_channel_join, &hook_info);
}
return 0;
}
/*
* ms_join
* parv[1] = channel TS
* parv[2] = channel
* parv[3] = "+", formerly channel modes but now unused
* alternatively, a single "0" parameter parts all channels
*/
static int
ms_join(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct Channel *chptr;
static struct Mode mode;
time_t oldts;
time_t newts;
int isnew;
int keep_our_modes = YES;
rb_dlink_node *ptr, *next_ptr;
/* special case for join 0 */
if((parv[1][0] == '0') && (parv[1][1] == '\0') && parc == 2)
{
do_join_0(client_p, source_p);
return 0;
}
if(parc < 4)
return 0;
if(!IsChannelName(parv[2]) || !check_channel_name(parv[2]))
return 0;
/* joins for local channels cant happen. */
if(parv[2][0] == '&')
return 0;
mbuf = modebuf;
mode.key[0] = mode.forward[0] = '\0';
mode.mode = mode.limit = mode.join_num = mode.join_time = 0;
if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
return 0;
newts = atol(parv[1]);
oldts = chptr->channelts;
#ifdef IGNORE_BOGUS_TS
if(newts < 800000000)
{
sendto_realops_snomask(SNO_DEBUG, L_ALL,
"*** Bogus TS %ld on %s ignored from %s",
(long) newts, chptr->chname, client_p->name);
newts = (oldts == 0) ? oldts : 800000000;
}
#else
/* making a channel TS0 */
if(!isnew && !newts && oldts)
{
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to 0",
me.name, chptr->chname, chptr->chname, (long) oldts);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Server %s changing TS on %s from %ld to 0",
source_p->name, chptr->chname, (long) oldts);
}
#endif
if(isnew)
chptr->channelts = newts;
else if(newts == 0 || oldts == 0)
chptr->channelts = 0;
else if(newts == oldts)
;
else if(newts < oldts)
{
keep_our_modes = NO;
chptr->channelts = newts;
}
/* Lost the TS, other side wins, so remove modes on this side */
if(!keep_our_modes)
{
set_final_mode(&mode, &chptr->mode);
chptr->mode = mode;
remove_our_modes(chptr, source_p);
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
{
del_invite(chptr, ptr->data);
}
/* If setting -j, clear join throttle state -- jilles */
chptr->join_count = chptr->join_delta = 0;
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to %ld",
me.name, chptr->chname, chptr->chname,
(long) oldts, (long) newts);
/* Update capitalization in channel name, this makes the
* capitalization timestamped like modes are -- jilles */
strcpy(chptr->chname, parv[2]);
if(*modebuf != '\0')
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s",
source_p->servptr->name,
chptr->chname, modebuf, parabuf);
*modebuf = *parabuf = '\0';
/* since we're dropping our modes, we want to clear the mlock as well. --nenolod */
set_channel_mlock(client_p, source_p, chptr, NULL, FALSE);
}
if(!IsMember(source_p, chptr))
{
add_user_to_channel(chptr, source_p, CHFL_PEON);
if (chptr->mode.join_num &&
rb_current_time() - chptr->join_delta >= chptr->mode.join_time)
{
chptr->join_count = 0;
chptr->join_delta = rb_current_time();
}
chptr->join_count++;
send_channel_join(chptr, source_p);
}
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s JOIN %ld %s +",
source_p->id, (long) chptr->channelts, chptr->chname);
return 0;
}
static int
ms_sjoin(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static char buf_uid[BUFSIZE];
static const char empty_modes[] = "0";
struct Channel *chptr;
struct Client *target_p, *fakesource_p;
time_t newts;
time_t oldts;
static struct Mode mode, *oldmode;
const char *modes;
int args = 0;
int keep_our_modes = 1;
int keep_new_modes = 1;
int fl;
int isnew;
int mlen_uid;
int len_nick;
int len_uid;
int len;
int joins = 0;
const char *s;
char *ptr_uid;
char *p;
int i, joinc = 0, timeslice = 0;
static char empty[] = "";
rb_dlink_node *ptr, *next_ptr;
if(parc < 5)
return 0;
if(!IsChannelName(parv[2]) || !check_channel_name(parv[2]))
return 0;
/* SJOIN's for local channels can't happen. */
if(*parv[2] == '&')
return 0;
modebuf[0] = parabuf[0] = mode.key[0] = mode.forward[0] = '\0';
pargs = mode.mode = mode.limit = mode.join_num = mode.join_time = 0;
/* Hide connecting server on netburst -- jilles */
if (ConfigServerHide.flatten_links && !HasSentEob(source_p))
fakesource_p = &me;
else
fakesource_p = source_p;
mbuf = modebuf;
newts = atol(parv[1]);
s = parv[3];
while (*s)
{
switch (*(s++))
{
case 'f':
rb_strlcpy(mode.forward, parv[4 + args], sizeof(mode.forward));
args++;
if(parc < 5 + args)
return 0;
break;
case 'j':
sscanf(parv[4 + args], "%d:%d", &joinc, &timeslice);
args++;
mode.join_num = joinc;
mode.join_time = timeslice;
if(parc < 5 + args)
return 0;
break;
case 'k':
rb_strlcpy(mode.key, parv[4 + args], sizeof(mode.key));
args++;
if(parc < 5 + args)
return 0;
break;
case 'l':
mode.limit = atoi(parv[4 + args]);
args++;
if(parc < 5 + args)
return 0;
break;
default:
if(chmode_flags[(int) *s] != 0)
{
mode.mode |= chmode_flags[(int) *s];
}
}
}
if(parv[args + 4])
{
s = parv[args + 4];
/* remove any leading spaces */
while (*s == ' ')
s++;
}
else
s = "";
if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
return 0; /* channel name too long? */
oldts = chptr->channelts;
oldmode = &chptr->mode;
#ifdef IGNORE_BOGUS_TS
if(newts < 800000000)
{
sendto_realops_snomask(SNO_DEBUG, L_ALL,
"*** Bogus TS %ld on %s ignored from %s",
(long) newts, chptr->chname, client_p->name);
newts = (oldts == 0) ? oldts : 800000000;
}
#else
if(!isnew && !newts && oldts)
{
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s "
"changed from %ld to 0",
me.name, chptr->chname, chptr->chname, (long) oldts);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"Server %s changing TS on %s from %ld to 0",
source_p->name, chptr->chname, (long) oldts);
}
#endif
if(isnew)
chptr->channelts = newts;
else if(newts == 0 || oldts == 0)
chptr->channelts = 0;
else if(newts == oldts)
;
else if(newts < oldts)
{
/* If configured, kick people trying to join +i/+k
* channels by recreating them on split servers.
* If the source has sent EOB, assume this is some
* sort of hack by services. If cmode +i is set,
* services can send kicks if needed; if the key
* differs, services cannot kick in a race-free
* manner so do so here.
* -- jilles */
if (ConfigChannel.kick_on_split_riding &&
((!HasSentEob(source_p) &&
mode.mode & MODE_INVITEONLY) ||
(mode.key[0] != 0 && irccmp(mode.key, oldmode->key) != 0)))
{
struct membership *msptr;
struct Client *who;
int l = rb_dlink_list_length(&chptr->members);
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->locmembers.head)
{
msptr = ptr->data;
who = msptr->client_p;
sendto_one(who, ":%s KICK %s %s :Net Rider",
me.name, chptr->chname, who->name);
sendto_server(NULL, chptr, CAP_TS6, NOCAPS,
":%s KICK %s %s :Net Rider",
me.id, chptr->chname,
who->id);
remove_user_from_channel(msptr);
if (--l == 0)
break;
}
if (l == 0)
{
/* Channel was emptied, create a new one */
if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
return 0; /* oops! */
oldmode = &chptr->mode;
}
}
keep_our_modes = NO;
chptr->channelts = newts;
}
else
keep_new_modes = NO;
if(!keep_new_modes)
mode = *oldmode;
else if(keep_our_modes)
{
mode.mode |= oldmode->mode;
if(oldmode->limit > mode.limit)
mode.limit = oldmode->limit;
if(strcmp(mode.key, oldmode->key) < 0)
strcpy(mode.key, oldmode->key);
if(oldmode->join_num > mode.join_num ||
(oldmode->join_num == mode.join_num &&
oldmode->join_time > mode.join_time))
{
mode.join_num = oldmode->join_num;
mode.join_time = oldmode->join_time;
}
if(irccmp(mode.forward, oldmode->forward) < 0)
strcpy(mode.forward, oldmode->forward);
}
else
{
/* If setting -j, clear join throttle state -- jilles */
if (!mode.join_num)
chptr->join_count = chptr->join_delta = 0;
}
set_final_mode(&mode, oldmode);
chptr->mode = mode;
/* Lost the TS, other side wins, so remove modes on this side */
if(!keep_our_modes)
{
remove_our_modes(chptr, fakesource_p);
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
{
del_invite(chptr, ptr->data);
}
if(rb_dlink_list_length(&chptr->banlist) > 0)
remove_ban_list(chptr, fakesource_p, &chptr->banlist, 'b', ALL_MEMBERS);
if(rb_dlink_list_length(&chptr->exceptlist) > 0)
remove_ban_list(chptr, fakesource_p, &chptr->exceptlist,
'e', ONLY_CHANOPS);
if(rb_dlink_list_length(&chptr->invexlist) > 0)
remove_ban_list(chptr, fakesource_p, &chptr->invexlist,
'I', ONLY_CHANOPS);
if(rb_dlink_list_length(&chptr->quietlist) > 0)
remove_ban_list(chptr, fakesource_p, &chptr->quietlist,
'q', ALL_MEMBERS);
chptr->bants++;
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %ld to %ld",
me.name, chptr->chname, chptr->chname,
(long) oldts, (long) newts);
/* Update capitalization in channel name, this makes the
* capitalization timestamped like modes are -- jilles */
strcpy(chptr->chname, parv[2]);
/* since we're dropping our modes, we want to clear the mlock as well. --nenolod */
set_channel_mlock(client_p, source_p, chptr, NULL, FALSE);
}
if(*modebuf != '\0')
sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s %s %s",
fakesource_p->name, chptr->chname, modebuf, parabuf);
*modebuf = *parabuf = '\0';
if(parv[3][0] != '0' && keep_new_modes)
modes = channel_modes(chptr, source_p);
else
modes = empty_modes;
mlen_uid = rb_sprintf(buf_uid, ":%s SJOIN %ld %s %s :",
use_id(source_p), (long) chptr->channelts, parv[2], modes);
ptr_uid = buf_uid + mlen_uid;
mbuf = modebuf;
para[0] = para[1] = para[2] = para[3] = empty;
pargs = 0;
len_nick = len_uid = 0;
/* if theres a space, theres going to be more than one nick, change the
* first space to \0, so s is just the first nick, and point p to the
* second nick
*/
if((p = strchr(s, ' ')) != NULL)
{
*p++ = '\0';
}
*mbuf++ = '+';
while (s)
{
fl = 0;
for (i = 0; i < 2; i++)
{
if(*s == '@')
{
fl |= CHFL_CHANOP;
s++;
}
else if(*s == '+')
{
fl |= CHFL_VOICE;
s++;
}
}
/* if the client doesnt exist or is fake direction, skip. */
if(!(target_p = find_client(s)) ||
(target_p->from != client_p) || !IsPerson(target_p))
goto nextnick;
/* we assume for these we can fit at least one nick/uid in.. */
/* check we can fit another status+nick+space into a buffer */
if((mlen_uid + len_uid + IDLEN + 3) > (BUFSIZE - 3))
{
*(ptr_uid - 1) = '\0';
sendto_server(client_p->from, NULL, CAP_TS6, NOCAPS, "%s", buf_uid);
ptr_uid = buf_uid + mlen_uid;
len_uid = 0;
}
if(keep_new_modes)
{
if(fl & CHFL_CHANOP)
{
*ptr_uid++ = '@';
len_nick++;
len_uid++;
}
if(fl & CHFL_VOICE)
{
*ptr_uid++ = '+';
len_nick++;
len_uid++;
}
}
/* copy the nick to the two buffers */
len = rb_sprintf(ptr_uid, "%s ", use_id(target_p));
ptr_uid += len;
len_uid += len;
if(!keep_new_modes)
fl = 0;
if(!IsMember(target_p, chptr))
{
add_user_to_channel(chptr, target_p, fl);
send_channel_join(chptr, target_p);
joins++;
}
if(fl & CHFL_CHANOP)
{
*mbuf++ = 'o';
para[pargs++] = target_p->name;
/* a +ov user.. bleh */
if(fl & CHFL_VOICE)
{
/* its possible the +o has filled up MAXMODEPARAMS, if so, start
* a new buffer
*/
if(pargs >= MAXMODEPARAMS)
{
*mbuf = '\0';
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
fakesource_p->name, chptr->chname,
modebuf,
para[0], para[1], para[2], para[3]);
mbuf = modebuf;
*mbuf++ = '+';
para[0] = para[1] = para[2] = para[3] = NULL;
pargs = 0;
}
*mbuf++ = 'v';
para[pargs++] = target_p->name;
}
}
else if(fl & CHFL_VOICE)
{
*mbuf++ = 'v';
para[pargs++] = target_p->name;
}
if(pargs >= MAXMODEPARAMS)
{
*mbuf = '\0';
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
fakesource_p->name,
chptr->chname,
modebuf, para[0], para[1], para[2], para[3]);
mbuf = modebuf;
*mbuf++ = '+';
para[0] = para[1] = para[2] = para[3] = NULL;
pargs = 0;
}
nextnick:
/* p points to the next nick */
s = p;
/* if there was a trailing space and p was pointing to it, then we
* need to exit.. this has the side effect of breaking double spaces
* in an sjoin.. but that shouldnt happen anyway
*/
if(s && (*s == '\0'))
s = p = NULL;
/* if p was NULL due to no spaces, s wont exist due to the above, so
* we cant check it for spaces.. if there are no spaces, then when
* we next get here, s will be NULL
*/
if(s && ((p = strchr(s, ' ')) != NULL))
{
*p++ = '\0';
}
}
*mbuf = '\0';
if(pargs)
{
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
fakesource_p->name, chptr->chname, modebuf,
para[0], CheckEmpty(para[1]),
CheckEmpty(para[2]), CheckEmpty(para[3]));
}
if(!joins && !(chptr->mode.mode & MODE_PERMANENT) && isnew)
{
destroy_channel(chptr);
return 0;
}
/* Keep the colon if we're sending an SJOIN without nicks -- jilles */
if (joins)
{
*(ptr_uid - 1) = '\0';
}
sendto_server(client_p->from, NULL, CAP_TS6, NOCAPS, "%s", buf_uid);
return 0;
}
/*
* do_join_0
*
* inputs - pointer to client doing join 0
* output - NONE
* side effects - Use has decided to join 0. This is legacy
* from the days when channels were numbers not names. *sigh*
*/
static void
do_join_0(struct Client *client_p, struct Client *source_p)
{
struct membership *msptr;
struct Channel *chptr = NULL;
rb_dlink_node *ptr;
/* Finish the flood grace period... */
if(MyClient(source_p) && !IsFloodDone(source_p))
flood_endgrace(source_p);
sendto_server(client_p, NULL, CAP_TS6, NOCAPS, ":%s JOIN 0", use_id(source_p));
while((ptr = source_p->user->channel.head))
{
if(MyConnect(source_p) &&
!IsOper(source_p) && !IsExemptSpambot(source_p))
check_spambot_warning(source_p, NULL);
msptr = ptr->data;
chptr = msptr->chptr;
sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s PART %s",
source_p->name,
source_p->username, source_p->host, chptr->chname);
remove_user_from_channel(msptr);
}
}
static int
check_channel_name_loc(struct Client *source_p, const char *name)
{
const char *p;
s_assert(name != NULL);
if(EmptyString(name))
return 0;
if(ConfigFileEntry.disable_fake_channels && !IsOper(source_p))
{
for(p = name; *p; ++p)
{
if(!IsChanChar(*p) || IsFakeChanChar(*p))
return 0;
}
}
else
{
for(p = name; *p; ++p)
{
if(!IsChanChar(*p))
return 0;
}
}
if(ConfigChannel.only_ascii_channels)
{
for(p = name; *p; ++p)
if(*p < 33 || *p > 126)
return 0;
}
return 1;
}
/* send_join_error()
*
* input - client to send to, reason, channel name
* output - none
* side effects - error message sent to client
*/
static void
send_join_error(struct Client *source_p, int numeric, const char *name)
{
/* This stuff is necessary because the form_str macro only
* accepts constants.
*/
switch (numeric)
{
#define NORMAL_NUMERIC(i) \
case i: \
sendto_one(source_p, form_str(i), \
me.name, source_p->name, name); \
break
NORMAL_NUMERIC(ERR_BANNEDFROMCHAN);
NORMAL_NUMERIC(ERR_INVITEONLYCHAN);
NORMAL_NUMERIC(ERR_BADCHANNELKEY);
NORMAL_NUMERIC(ERR_CHANNELISFULL);
NORMAL_NUMERIC(ERR_NEEDREGGEDNICK);
NORMAL_NUMERIC(ERR_THROTTLE);
default:
sendto_one_numeric(source_p, numeric,
"%s :Cannot join channel", name);
break;
}
}
static void
set_final_mode(struct Mode *mode, struct Mode *oldmode)
{
int dir = MODE_QUERY;
char *pbuf = parabuf;
int len;
int i;
/* ok, first get a list of modes we need to add */
for (i = 0; i < 256; i++)
{
if((mode->mode & chmode_flags[i]) && !(oldmode->mode & chmode_flags[i]))
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = i;
}
}
/* now the ones we need to remove. */
for (i = 0; i < 256; i++)
{
if((oldmode->mode & chmode_flags[i]) && !(mode->mode & chmode_flags[i]))
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = i;
}
}
if(oldmode->limit && !mode->limit)
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = 'l';
}
if(oldmode->key[0] && !mode->key[0])
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = 'k';
len = rb_sprintf(pbuf, "%s ", oldmode->key);
pbuf += len;
}
if(oldmode->join_num && !mode->join_num)
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = 'j';
}
if(oldmode->forward[0] && !mode->forward[0])
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = 'f';
}
if(mode->limit && oldmode->limit != mode->limit)
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'l';
len = rb_sprintf(pbuf, "%d ", mode->limit);
pbuf += len;
}
if(mode->key[0] && strcmp(oldmode->key, mode->key))
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'k';
len = rb_sprintf(pbuf, "%s ", mode->key);
pbuf += len;
}
if(mode->join_num && (oldmode->join_num != mode->join_num || oldmode->join_time != mode->join_time))
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'j';
len = rb_sprintf(pbuf, "%d:%d ", mode->join_num, mode->join_time);
pbuf += len;
}
if(mode->forward[0] && strcmp(oldmode->forward, mode->forward) &&
ConfigChannel.use_forward)
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'f';
len = rb_sprintf(pbuf, "%s ", mode->forward);
pbuf += len;
}
*mbuf = '\0';
}
/*
* remove_our_modes
*
* inputs -
* output -
* side effects -
*/
static void
remove_our_modes(struct Channel *chptr, struct Client *source_p)
{
struct membership *msptr;
rb_dlink_node *ptr;
char lmodebuf[MODEBUFLEN];
char *lpara[MAXMODEPARAMS];
int count = 0;
int i;
mbuf = lmodebuf;
*mbuf++ = '-';
for(i = 0; i < MAXMODEPARAMS; i++)
lpara[i] = NULL;
RB_DLINK_FOREACH(ptr, chptr->members.head)
{
msptr = ptr->data;
if(is_chanop(msptr))
{
msptr->flags &= ~CHFL_CHANOP;
lpara[count++] = msptr->client_p->name;
*mbuf++ = 'o';
/* +ov, might not fit so check. */
if(is_voiced(msptr))
{
if(count >= MAXMODEPARAMS)
{
*mbuf = '\0';
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
source_p->name, chptr->chname,
lmodebuf, lpara[0], lpara[1],
lpara[2], lpara[3]);
/* preserve the initial '-' */
mbuf = lmodebuf;
*mbuf++ = '-';
count = 0;
for(i = 0; i < MAXMODEPARAMS; i++)
lpara[i] = NULL;
}
msptr->flags &= ~CHFL_VOICE;
lpara[count++] = msptr->client_p->name;
*mbuf++ = 'v';
}
}
else if(is_voiced(msptr))
{
msptr->flags &= ~CHFL_VOICE;
lpara[count++] = msptr->client_p->name;
*mbuf++ = 'v';
}
else
continue;
if(count >= MAXMODEPARAMS)
{
*mbuf = '\0';
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
source_p->name, chptr->chname, lmodebuf,
lpara[0], lpara[1], lpara[2], lpara[3]);
mbuf = lmodebuf;
*mbuf++ = '-';
count = 0;
for(i = 0; i < MAXMODEPARAMS; i++)
lpara[i] = NULL;
}
}
if(count != 0)
{
*mbuf = '\0';
sendto_channel_local(ALL_MEMBERS, chptr,
":%s MODE %s %s %s %s %s %s",
source_p->name, chptr->chname, lmodebuf,
EmptyString(lpara[0]) ? "" : lpara[0],
EmptyString(lpara[1]) ? "" : lpara[1],
EmptyString(lpara[2]) ? "" : lpara[2],
EmptyString(lpara[3]) ? "" : lpara[3]);
}
}
/* remove_ban_list()
*
* inputs - channel, source, list to remove, char of mode, caps needed
* outputs -
* side effects - given list is removed, with modes issued to local clients
*/
static void
remove_ban_list(struct Channel *chptr, struct Client *source_p,
rb_dlink_list * list, char c, int mems)
{
static char lmodebuf[BUFSIZE];
static char lparabuf[BUFSIZE];
struct Ban *banptr;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
char *pbuf;
int count = 0;
int cur_len, mlen, plen;
pbuf = lparabuf;
cur_len = mlen = rb_sprintf(lmodebuf, ":%s MODE %s -", source_p->name, chptr->chname);
mbuf = lmodebuf + mlen;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
{
banptr = ptr->data;
/* trailing space, and the mode letter itself */
plen = strlen(banptr->banstr) +
(banptr->forward ? strlen(banptr->forward) + 1 : 0) + 2;
if(count >= MAXMODEPARAMS || (cur_len + plen) > BUFSIZE - 4)
{
/* remove trailing space */
*mbuf = '\0';
*(pbuf - 1) = '\0';
sendto_channel_local(mems, chptr, "%s %s", lmodebuf, lparabuf);
cur_len = mlen;
mbuf = lmodebuf + mlen;
pbuf = lparabuf;
count = 0;
}
*mbuf++ = c;
cur_len += plen;
if (banptr->forward)
pbuf += rb_sprintf(pbuf, "%s$%s ", banptr->banstr, banptr->forward);
else
pbuf += rb_sprintf(pbuf, "%s ", banptr->banstr);
count++;
free_ban(banptr);
}
*mbuf = '\0';
*(pbuf - 1) = '\0';
sendto_channel_local(mems, chptr, "%s %s", lmodebuf, lparabuf);
list->head = list->tail = NULL;
list->length = 0;
}
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