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ircd-ratbox/ircd-ratbox-3.0.10/modules/core/m_join.c
agatha 62da4c26fa Initial commit
2023-08-20 13:26:10 -04:00

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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) 2002-2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*
* $Id: m_join.c 28677 2015-09-29 17:51:20Z androsyn $
*/
#include "stdinc.h"
#include "struct.h"
#include "channel.h"
#include "client.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 "parse.h"
#include "modules.h"
#include "s_log.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 **);
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, 0}, mg_ignore, mg_ignore}
};
mapi_clist_av1 join_clist[] = { &join_msgtab, &sjoin_msgtab, NULL };
DECLARE_MODULE_AV1(join, NULL, NULL, join_clist, NULL, NULL, "$Revision: 28677 $");
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 int can_join(struct Client *source_p, struct Channel *chptr, char *key);
static void set_final_mode(struct Client *, struct Channel *, struct Mode *, struct Mode *);
static void remove_our_modes(struct Channel *chptr);
static void remove_ban_list(struct Channel *chptr, struct Client *source_p,
rb_dlink_list *list, char c, int cap, int mems);
/*
* m_join
* parv[0] = sender prefix
* 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;
struct ConfItem *aconf;
char *name;
char *key = NULL;
int i, flags = 0;
char *p = NULL, *p2 = NULL;
char *chanlist;
char *mykey;
int successful_join_count = 0; /* Number of channels successfully joined */
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))
{
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_flags(UMODE_SPY, L_ALL,
"User %s (%s@%s) is attempting to join locally juped channel %s (%s)",
source_p->name, source_p->username,
source_p->host, 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))
{
/* 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;
if(rb_dlink_list_length(&chptr->members) == 0)
flags = CHFL_CHANOP;
else
flags = 0;
}
else
{
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);
if(successful_join_count)
source_p->localClient->last_join_time = rb_current_time();
return 0;
}
if(flags == 0) /* if channel doesn't exist, don't penalize */
successful_join_count++;
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);
if(successful_join_count > 0)
successful_join_count--;
continue;
}
}
if(!IsOper(source_p) && !IsExemptSpambot(source_p))
check_spambot_warning(source_p, name);
/* can_join checks for +i key, bans etc */
if((i = can_join(source_p, chptr, key)))
{
sendto_one(source_p, form_str(i), me.name, source_p->name, name);
if(successful_join_count > 0)
successful_join_count--;
continue;
}
/* add the user to the channel */
add_user_to_channel(chptr, source_p, flags);
/* we send the user their join here, because we could have to
* send a mode out next.
*/
sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
source_p->name,
source_p->username, source_p->host, chptr->chname);
/* 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;
sendto_channel_local(ONLY_CHANOPS, chptr, ":%s MODE %s +nt",
me.name, chptr->chname);
if(*chptr->chname == '#')
{
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s SJOIN %" RBTT_FMT " %s +nt :@%s",
me.id, chptr->channelts,
chptr->chname, source_p->id);
sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
":%s SJOIN %" RBTT_FMT " %s +nt :@%s",
me.name, chptr->channelts,
chptr->chname, source_p->name);
}
}
else
{
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s JOIN %" RBTT_FMT " %s +",
use_id(source_p), (long)chptr->channelts, chptr->chname);
sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
":%s SJOIN %" RBTT_FMT " %s + :%s",
me.name, (long)chptr->channelts,
chptr->chname, source_p->name);
}
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->topic);
sendto_one(source_p, form_str(RPL_TOPICWHOTIME),
me.name, source_p->name, chptr->chname,
chptr->topic->topic_info, chptr->topic->topic_time);
}
channel_member_names(chptr, source_p, 1);
if(successful_join_count)
source_p->localClient->last_join_time = rb_current_time();
}
return 0;
}
/*
* ms_join
*
* inputs -
* output - none
* side effects - handles remote JOIN's sent by servers. In TSora
* remote clients are joined using SJOIN, hence a
* JOIN sent by a server on behalf of a client is an error.
* here, the initial code is in to take an extra parameter
* and use it for the TimeStamp on a new channel.
*/
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;
int keep_new_modes = YES;
/* 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;
mode.key[0] = '\0';
mode.mode = mode.limit = 0;
if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
return 0;
newts = atol(parv[1]);
oldts = chptr->channelts;
/* making a channel TS0 */
if(!isnew && !newts && oldts)
{
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %" RBTT_FMT " to 0",
me.name, chptr->chname, chptr->chname, oldts);
sendto_realops_flags(UMODE_ALL, L_ALL,
"Server %s changing TS on %s from %" RBTT_FMT " to 0",
source_p->name, chptr->chname, oldts);
}
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;
}
else
keep_new_modes = NO;
/* Lost the TS, other side wins, so remove modes on this side */
if(!keep_our_modes)
{
remove_our_modes(chptr);
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %" RBTT_FMT " to %" RBTT_FMT,
me.name, chptr->chname, chptr->chname, oldts,
newts);
set_final_mode(source_p->servptr, chptr, &mode, &chptr->mode);
chptr->mode = mode;
}
if(!IsMember(source_p, chptr))
{
add_user_to_channel(chptr, source_p, CHFL_PEON);
sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
source_p->name, source_p->username,
source_p->host, chptr->chname);
}
sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
":%s JOIN %" RBTT_FMT " %s +", source_p->id, chptr->channelts, chptr->chname);
sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
":%s SJOIN %" RBTT_FMT " %s %s :%s",
source_p->servptr->name, chptr->channelts,
chptr->chname, keep_new_modes ? "+" : "0", source_p->name);
return 0;
}
/*
* ms_sjoin
* parv[0] - sender
* parv[1] - TS
* parv[2] - channel
* parv[3] - modes + n arguments (key and/or limit)
* parv[4+n] - flags+nick list (all in one parameter)
*
* process a SJOIN, taking the TS's into account to either ignore the
* incoming modes or undo the existing ones or merge them, and JOIN
* all the specified users while sending JOIN/MODEs to local clients
*/
static int
ms_sjoin(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static char modebuf[MODEBUFLEN];
static char *mbuf;
static char buf_nick[BUFSIZE];
static char buf_uid[BUFSIZE];
static const char *para[MAXMODEPARAMS];
static const char empty_modes[] = "0";
struct Channel *chptr;
struct Client *target_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_nick, mlen_uid;
int len_nick;
int len_uid;
int len;
int joins = 0;
const char *s;
char *ptr_nick;
char *ptr_uid;
char *p;
int i;
static char empty[] = "";
int pargs;
/* I dont trust servers *not* to end up sending us a blank sjoin, so
* its better not to make a big deal about it. --fl
*/
if(parc < 5 || EmptyString(parv[4]))
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;
mode.key[0] = '\0';
mode.mode = mode.limit = 0;
newts = atol(parv[1]);
s = parv[3];
while(*s)
{
switch (*(s++))
{
case 'i':
mode.mode |= MODE_INVITEONLY;
break;
case 'n':
mode.mode |= MODE_NOPRIVMSGS;
break;
case 'p':
mode.mode |= MODE_PRIVATE;
break;
case 's':
mode.mode |= MODE_SECRET;
break;
case 'm':
mode.mode |= MODE_MODERATED;
break;
case 't':
mode.mode |= MODE_TOPICLIMIT;
break;
#ifdef ENABLE_SERVICES
case 'r':
mode.mode |= MODE_REGONLY;
break;
#endif
case 'S':
mode.mode |= MODE_SSLONLY;
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;
}
}
s = parv[args + 4];
/* remove any leading spaces */
while(*s == ' ')
s++;
if(EmptyString(s))
return 0;
if((chptr = get_or_create_channel(source_p, parv[2], &isnew)) == NULL)
return 0; /* channel name too long? */
oldts = chptr->channelts;
oldmode = &chptr->mode;
if(!isnew && !newts && oldts)
{
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s "
"changed from %" RBTT_FMT " to 0",
me.name, chptr->chname, chptr->chname, oldts);
sendto_realops_flags(UMODE_ALL, L_ALL,
"Server %s changing TS on %s from %" RBTT_FMT " to 0",
source_p->name, chptr->chname, oldts);
}
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;
}
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);
}
/* Lost the TS, other side wins, so remove modes on this side */
if(!keep_our_modes)
{
remove_our_modes(chptr);
sendto_channel_local(ALL_MEMBERS, chptr,
":%s NOTICE %s :*** Notice -- TS for %s changed from %" RBTT_FMT " to %" RBTT_FMT,
me.name, chptr->chname, chptr->chname,
oldts, newts);
}
set_final_mode(source_p, chptr, &mode, oldmode);
chptr->mode = mode;
*modebuf = '\0';
if(parv[3][0] != '0' && keep_new_modes)
modes = channel_modes(chptr, source_p);
else
modes = empty_modes;
mlen_nick = rb_sprintf(buf_nick, ":%s SJOIN %" RBTT_FMT " %s %s :",
source_p->name, chptr->channelts, parv[2], modes);
ptr_nick = buf_nick + mlen_nick;
/* working on the presumption eventually itll be more efficient to
* build a TS6 buffer without checking its needed..
*/
mlen_uid = rb_sprintf(buf_uid, ":%s SJOIN %" RBTT_FMT " %s %s :",
use_id(source_p), 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;
*mbuf++ = '+';
/* 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';
}
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) || !IsClient(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_nick + len_nick + NICKLEN + 3) > (BUFSIZE - 3))
{
*(ptr_nick - 1) = '\0';
sendto_server(client_p->from, NULL, NOCAPS, CAP_TS6, "%s", buf_nick);
ptr_nick = buf_nick + mlen_nick;
len_nick = 0;
}
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_nick++ = '@';
*ptr_uid++ = '@';
len_nick++;
len_uid++;
}
if(fl & CHFL_VOICE)
{
*ptr_nick++ = '+';
*ptr_uid++ = '+';
len_nick++;
len_uid++;
}
}
/* copy the nick to the two buffers */
len = rb_sprintf(ptr_nick, "%s ", target_p->name);
ptr_nick += len;
len_nick += len;
len = rb_sprintf(ptr_uid, "%s ", use_id(target_p));
ptr_uid += len;
len_uid += len;
if(!keep_new_modes)
{
if(fl & CHFL_CHANOP)
fl = CHFL_DEOPPED;
else
fl = 0;
}
if(!IsMember(target_p, chptr))
{
add_user_to_channel(chptr, target_p, fl);
sendto_channel_local(ALL_MEMBERS, chptr, ":%s!%s@%s JOIN :%s",
target_p->name,
target_p->username, target_p->host, parv[2]);
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",
source_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",
source_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",
source_p->name, chptr->chname, modebuf,
para[0], CheckEmpty(para[1]), CheckEmpty(para[2]),
CheckEmpty(para[3]));
}
if(!joins)
{
if(isnew)
destroy_channel(chptr);
return 0;
}
*(ptr_nick - 1) = '\0';
*(ptr_uid - 1) = '\0';
sendto_server(client_p->from, NULL, CAP_TS6, NOCAPS, "%s", buf_uid);
sendto_server(client_p->from, NULL, NOCAPS, CAP_TS6, "%s", buf_nick);
/* if the source does TS6 we have to remove our bans. Its now safe
* to issue -b's to the non-ts6 servers, as the sjoin we've just
* sent will kill any ops they have.
*/
if(!keep_our_modes && source_p->id[0] != '\0')
{
if(rb_dlink_list_length(&chptr->banlist) > 0)
remove_ban_list(chptr, source_p, &chptr->banlist, 'b', NOCAPS, ALL_MEMBERS);
if(rb_dlink_list_length(&chptr->exceptlist) > 0)
remove_ban_list(chptr, source_p, &chptr->exceptlist,
'e', CAP_EX, ONLY_CHANOPS);
if(rb_dlink_list_length(&chptr->invexlist) > 0)
remove_ban_list(chptr, source_p, &chptr->invexlist,
'I', CAP_IE, ONLY_CHANOPS);
chptr->ban_serial++;
}
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*
* There is a bunch of evilness necessary here due to
* anti spambot code.
*/
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));
sendto_server(client_p, NULL, NOCAPS, CAP_TS6, ":%s JOIN 0", source_p->name);
if(source_p->user->channel.head && MyConnect(source_p) &&
!IsOper(source_p) && !IsExemptSpambot(source_p))
check_spambot_warning(source_p, NULL);
while((ptr = source_p->user->channel.head))
{
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)
{
s_assert(name != NULL);
if(EmptyString(name))
return 0;
if(ConfigFileEntry.disable_fake_channels && !IsOper(source_p))
{
for(; *name; ++name)
{
if(!IsChanChar(*name) || IsFakeChanChar(*name))
return 0;
}
}
else
{
for(; *name; ++name)
{
if(!IsChanChar(*name))
return 0;
}
}
return 1;
}
/* can_join()
*
* input - client to check, channel to check for, key
* output - reason for not being able to join, else 0
* side effects -
*/
static int
can_join(struct Client *source_p, struct Channel *chptr, char *key)
{
rb_dlink_node *lp;
rb_dlink_node *ptr;
struct Ban *invex = NULL;
char src_host[NICKLEN + USERLEN + HOSTLEN + 6];
char src_iphost[NICKLEN + USERLEN + HOSTLEN + 6];
s_assert(source_p->localClient != NULL);
rb_sprintf(src_host, "%s!%s@%s", source_p->name, source_p->username, source_p->host);
rb_sprintf(src_iphost, "%s!%s@%s", source_p->name, source_p->username, source_p->sockhost);
if((is_banned(chptr, source_p, NULL, src_host, src_iphost)) == CHFL_BAN)
return (ERR_BANNEDFROMCHAN);
if(chptr->mode.mode & MODE_INVITEONLY)
{
RB_DLINK_FOREACH(lp, source_p->localClient->invited.head)
{
if(lp->data == chptr)
break;
}
if(lp == NULL)
{
if(!ConfigChannel.use_invex)
return (ERR_INVITEONLYCHAN);
RB_DLINK_FOREACH(ptr, chptr->invexlist.head)
{
invex = ptr->data;
if(match(invex->banstr, src_host)
|| match(invex->banstr, src_iphost)
|| match_cidr(invex->banstr, src_iphost))
break;
}
if(ptr == NULL)
return (ERR_INVITEONLYCHAN);
}
}
if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key)))
return (ERR_BADCHANNELKEY);
if(chptr->mode.limit &&
rb_dlink_list_length(&chptr->members) >= (unsigned long)chptr->mode.limit)
return (ERR_CHANNELISFULL);
#ifdef ENABLE_SERVICES
if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser))
return ERR_NEEDREGGEDNICK;
#endif
if(ConfigChannel.use_sslonly && chptr->mode.mode & MODE_SSLONLY && !IsSSL(source_p))
return ERR_SSLONLYCHAN;
return 0;
}
static struct mode_letter
{
int mode;
char letter;
} flags[] =
{
{
MODE_NOPRIVMSGS, 'n'},
{
MODE_TOPICLIMIT, 't'},
{
MODE_SECRET, 's'},
{
MODE_MODERATED, 'm'},
{
MODE_INVITEONLY, 'i'},
{
MODE_PRIVATE, 'p'},
#ifdef ENABLE_SERVICES
{
MODE_REGONLY, 'r'},
#endif
{
MODE_SSLONLY, 'S'},
{
0, 0}
};
static void
set_final_mode(struct Client *source_p, struct Channel *chptr,
struct Mode *mode, struct Mode *oldmode)
{
static char lmodebuf[MODEBUFLEN];
static char lparabuf[MODEBUFLEN];
int dir = MODE_QUERY;
char *mbuf = lmodebuf;
char *pbuf = lparabuf;
int i;
lparabuf[0] = '\0';
/* ok, first get a list of modes we need to add */
for(i = 0; flags[i].letter; i++)
{
if((mode->mode & flags[i].mode) && !(oldmode->mode & flags[i].mode))
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = flags[i].letter;
}
}
/* now the ones we need to remove. */
for(i = 0; flags[i].letter; i++)
{
if((oldmode->mode & flags[i].mode) && !(mode->mode & flags[i].mode))
{
if(dir != MODE_DEL)
{
*mbuf++ = '-';
dir = MODE_DEL;
}
*mbuf++ = flags[i].letter;
}
}
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';
pbuf += rb_sprintf(pbuf, "%s ", oldmode->key);
}
if(mode->limit && oldmode->limit != mode->limit)
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'l';
pbuf += rb_sprintf(pbuf, "%d ", mode->limit);
}
if(mode->key[0] && strcmp(oldmode->key, mode->key))
{
if(dir != MODE_ADD)
{
*mbuf++ = '+';
dir = MODE_ADD;
}
*mbuf++ = 'k';
pbuf += rb_sprintf(pbuf, "%s ", mode->key);
}
*mbuf = '\0';
if(!EmptyString(lmodebuf))
{
/* arguments, cut trailing space */
if(!EmptyString(lparabuf))
{
*(pbuf - 1) = '\0';
sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s %s %s",
source_p->name, chptr->chname, lmodebuf, lparabuf);
}
else
sendto_channel_local(ALL_MEMBERS, chptr, ":%s MODE %s %s",
source_p->name, chptr->chname, lmodebuf);
}
}
/*
* remove_our_modes
*
* inputs -
* output -
* side effects -
*/
static void
remove_our_modes(struct Channel *chptr)
{
struct membership *msptr;
rb_dlink_node *ptr;
char lmodebuf[MODEBUFLEN];
const char *lpara[MAXMODEPARAMS];
char *mbuf;
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",
me.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",
me.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",
me.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
* and non-TS6 servers.
*/
static void
remove_ban_list(struct Channel *chptr, struct Client *source_p,
rb_dlink_list *list, char c, int cap, int mems)
{
static char lmodebuf[BUFSIZE];
static char lparabuf[BUFSIZE];
struct Ban *banptr;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
char *mbuf, *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) + 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);
sendto_server(source_p, chptr, cap, CAP_TS6, "%s %s", lmodebuf, lparabuf);
cur_len = mlen;
mbuf = lmodebuf + mlen;
pbuf = lparabuf;
count = 0;
}
*mbuf++ = c;
cur_len += plen;
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);
sendto_server(source_p, chptr, cap, CAP_TS6, "%s %s", lmodebuf, lparabuf);
list->head = list->tail = NULL;
list->length = 0;
}
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