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ircu2/ircd/m_clearmode.c

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/*
* IRC - Internet Relay Chat, ircd/m_clearmode.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
* Copyright (C) 2000 Kevin L. Mitchell <klmitch@mit.edu>
*
* 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.
*
* $Id: m_clearmode.c 1496 2005-09-27 02:41:57Z entrope $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "client.h"
#include "channel.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_alloc.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_string.h"
#include "list.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "s_conf.h"
#include "send.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
/*
* do_clearmode(struct Client *cptr, struct Client *sptr,
* struct Channel *chptr, char *control)
*
* This is the function that actually clears the channel modes.
*/
static int
do_clearmode(struct Client *cptr, struct Client *sptr, struct Channel *chptr,
char *control)
{
static int flags[] = {
MODE_CHANOP, 'o',
MODE_HALFOP, 'h',
MODE_VOICE, 'v',
MODE_PRIVATE, 'p',
MODE_SECRET, 's',
MODE_MODERATED, 'm',
MODE_TOPICLIMIT, 't',
MODE_INVITEONLY, 'i',
MODE_NOPRIVMSGS, 'n',
MODE_KEY, 'k',
MODE_BAN, 'b',
MODE_EXCEPT, 'e',
MODE_LIMIT, 'l',
MODE_REGONLY, 'r',
MODE_DELJOINS, 'D',
0x0, 0x0
};
static int exflags[] = {
EXMODE_ADMINONLY, 'a',
EXMODE_OPERONLY, 'O',
EXMODE_REGMODERATED, 'M',
EXMODE_NONOTICES, 'N',
EXMODE_SSLONLY, 'Z',
EXMODE_NONOTICES, 'Q',
EXMODE_NOCTCPS, 'C',
EXMODE_NOMULTITARG, 'T',
EXMODE_NOCOLOR, 'c',
EXMODE_STRIPCOLOR, 'S',
0x0, 0x0
};
int *flag_p;
unsigned int del_mode = 0;
unsigned int del_exmode = 0;
char control_buf[20];
int control_buf_i = 0;
struct ModeBuf mbuf;
struct Ban *link, *next;
struct Membership *member;
/* Ok, so what are we supposed to get rid of? */
for (; *control; control++) {
for (flag_p = flags; flag_p[0]; flag_p += 2)
if (*control == flag_p[1]) {
del_mode |= flag_p[0];
break;
}
for (flag_p = exflags; flag_p[0]; flag_p += 2)
if (*control == flag_p[1]) {
del_exmode |= flag_p[0];
break;
}
}
if (!del_mode && !del_exmode)
return 0; /* nothing to remove; ho hum. */
modebuf_init(&mbuf, sptr, cptr, chptr,
(MODEBUF_DEST_CHANNEL | /* Send MODE to channel */
MODEBUF_DEST_OPMODE | /* Treat it like an OPMODE */
MODEBUF_DEST_HACK4)); /* Generate a HACK(4) notice */
modebuf_mode(&mbuf, MODE_DEL | (del_mode & chptr->mode.mode));
modebuf_mode(&mbuf, MODE_DEL | (del_exmode & chptr->mode.exmode));
chptr->mode.mode &= ~del_mode; /* and of course actually delete them */
chptr->mode.exmode &= ~del_exmode;
/* If we're removing invite, remove all the invites */
if (del_mode & MODE_INVITEONLY)
mode_invite_clear(chptr);
/*
* If we're removing the key, note that; note that we can't clear
* the key until after modebuf_* are done with it
*/
if (del_mode & MODE_KEY && *chptr->mode.key)
modebuf_mode_string(&mbuf, MODE_DEL | MODE_KEY, chptr->mode.key, 0);
/* If we're removing the limit, note that and clear the limit */
if (del_mode & MODE_LIMIT && chptr->mode.limit) {
modebuf_mode_uint(&mbuf, MODE_DEL | MODE_LIMIT, chptr->mode.limit);
chptr->mode.limit = 0; /* not referenced, so safe */
}
/*
* Go through and mark the bans for deletion; note that we can't
* free them until after modebuf_* are done with them
*/
if (del_mode & MODE_BAN) {
for (link = chptr->banlist; link; link = next) {
char *bandup;
next = link->next;
DupString(bandup, link->banstr);
modebuf_mode_string(&mbuf, MODE_DEL | MODE_BAN, /* delete ban */
bandup, 1);
free_ban(link);
}
chptr->banlist = 0;
}
if (del_mode & MODE_EXCEPT) {
for (link = chptr->exceptlist; link; link = next) {
char *exdup;
next = link->next;
DupString(exdup, link->banstr);
modebuf_mode_string(&mbuf, MODE_DEL | MODE_EXCEPT, /* delete ban */
exdup, 1);
free_ban(link);
}
chptr->exceptlist = 0;
}
/* Deal with users on the channel */
if (del_mode & (MODE_BAN | MODE_EXCEPT | MODE_CHANOP | MODE_HALFOP | MODE_VOICE))
for (member = chptr->members; member; member = member->next_member) {
if (IsZombie(member)) /* we ignore zombies */
continue;
if (del_mode & MODE_BAN) { /* If we cleared bans, clear the valid flags */
ClearBanValid(member);
ClearBanValidQuiet(member);
ClearBanValidNick(member);
}
if (del_mode & MODE_EXCEPT) { /* If we cleared excepts, clear the valid flags */
ClearExceptValid(member);
ClearExceptValidQuiet(member);
ClearExceptValidNick(member);
}
/* Drop channel operator status */
if (IsChanOp(member) && del_mode & MODE_CHANOP) {
modebuf_mode_client(&mbuf, MODE_DEL | MODE_CHANOP, member->user, MAXOPLEVEL + 1);
member->status &= ~CHFL_CHANOP;
}
/* Drop channel halfop status */
if (IsHalfOp(member) && del_mode & MODE_HALFOP) {
modebuf_mode_client(&mbuf, MODE_DEL | MODE_HALFOP, member->user, MAXOPLEVEL + 1);
member->status &= ~CHFL_HALFOP;
}
/* Drop voice */
if (HasVoice(member) && del_mode & MODE_VOICE) {
modebuf_mode_client(&mbuf, MODE_DEL | MODE_VOICE, member->user, MAXOPLEVEL + 1);
member->status &= ~CHFL_VOICE;
}
}
/* And flush the modes to the channel */
modebuf_flush(&mbuf);
/* Finally, we can clear the key... */
if (del_mode & MODE_KEY)
chptr->mode.key[0] = '\0';
/* Ok, build control string again */
for (flag_p = flags; flag_p[0]; flag_p += 2)
if (del_mode & flag_p[0])
control_buf[control_buf_i++] = flag_p[1];
for (flag_p = exflags; flag_p[0]; flag_p += 2)
if (del_exmode & flag_p[0])
control_buf[control_buf_i++] = flag_p[1];
control_buf[control_buf_i] = '\0';
/* Log it... */
log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE, "%#C CLEARMODE %H %s", sptr,
chptr, control_buf);
/* Then send it */
if (!IsLocalChannel(chptr->chname))
sendcmdto_serv_butone(sptr, CMD_CLEARMODE, cptr, "%H %s", chptr,
control_buf);
return 0;
}
/*
* ms_clearmode - server message handler
*
* parv[0] = Send prefix
* parv[1] = Channel name
* parv[2] = Control string
*/
int
ms_clearmode(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
if (parc < 3)
return need_more_params(sptr, "CLEARMODE");
if (!IsPrivileged(sptr)) {
protocol_violation(sptr,"No privileges on source for CLEARMODE, desync?");
return send_reply(sptr, ERR_NOPRIVILEGES);
}
if (!IsChannelName(parv[1]) || IsLocalChannel(parv[1]) ||
!(chptr = FindChannel(parv[1])))
return send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
return do_clearmode(cptr, sptr, chptr, parv[2]);
}
/*
* mo_clearmode - oper message handler
*
* parv[0] = Send prefix
* parv[1] = Channel name
* parv[2] = Control string
*/
int
mo_clearmode(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *control = "ovpsmikbl"; /* default control string */
const char *chname, *qreason;
int force = 0;
if (!feature_bool(FEAT_CONFIG_OPERCMDS))
return send_reply(sptr, ERR_DISABLED, "CLEARMODE");
if (parc < 2)
return need_more_params(sptr, "CLEARMODE");
if (parc > 2)
control = parv[2];
chname = parv[1];
if (*chname == '!')
{
chname++;
if (!HasPriv(sptr, IsLocalChannel(chname) ?
PRIV_FORCE_LOCAL_OPMODE :
PRIV_FORCE_OPMODE))
return send_reply(sptr, ERR_NOPRIVILEGES);
force = 1;
}
if (!HasPriv(sptr,
IsLocalChannel(chname) ? PRIV_LOCAL_OPMODE : PRIV_OPMODE))
return send_reply(sptr, ERR_NOPRIVILEGES);
if (('#' != *chname && '&' != *chname) || !(chptr = FindChannel(chname)))
return send_reply(sptr, ERR_NOSUCHCHANNEL, chname);
if (!force && (qreason = find_quarantine(chptr->chname)))
return send_reply(sptr, ERR_QUARANTINED, chptr->chname, qreason);
return do_clearmode(cptr, sptr, chptr, control);
}
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