d1316b193b
Arbitrarily prefer a forward channel to no forward channel and an alphabetically higher forward channel to a lower one. This is a simplistic implementation that generates one MODE message to local clients for each ban removed (to be replaced). For simplicity and to avoid amplification of incoming MODE messages, regular modes may still desync the forward channel of a ban.
435 lines
10 KiB
C
435 lines
10 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_mode.c: Sets a user or channel mode.
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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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* $Id: m_mode.c 1006 2006-03-09 15:32:14Z nenolod $
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*/
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#include "stdinc.h"
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#include "channel.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_user.h"
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#include "s_conf.h"
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#include "s_serv.h"
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#include "logger.h"
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#include "send.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 "packet.h"
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#include "s_newconf.h"
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static int m_mode(struct Client *, struct Client *, int, const char **);
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static int ms_mode(struct Client *, struct Client *, int, const char **);
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static int ms_tmode(struct Client *, struct Client *, int, const char **);
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static int ms_mlock(struct Client *, struct Client *, int, const char **);
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static int ms_bmask(struct Client *, struct Client *, int, const char **);
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struct Message mode_msgtab = {
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"MODE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, {m_mode, 2}, {m_mode, 3}, {ms_mode, 3}, mg_ignore, {m_mode, 2}}
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};
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struct Message tmode_msgtab = {
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"TMODE", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_ignore, {ms_tmode, 4}, {ms_tmode, 4}, mg_ignore, mg_ignore}
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};
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struct Message mlock_msgtab = {
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"MLOCK", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_ignore, {ms_mlock, 3}, {ms_mlock, 3}, mg_ignore, mg_ignore}
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};
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struct Message bmask_msgtab = {
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"BMASK", 0, 0, 0, MFLG_SLOW,
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{mg_ignore, mg_ignore, mg_ignore, {ms_bmask, 5}, mg_ignore, mg_ignore}
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};
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mapi_clist_av1 mode_clist[] = { &mode_msgtab, &tmode_msgtab, &mlock_msgtab, &bmask_msgtab, NULL };
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DECLARE_MODULE_AV1(mode, NULL, NULL, mode_clist, NULL, NULL, "$Revision: 1006 $");
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/*
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* m_mode - MODE command handler
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* parv[1] - channel
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*/
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static int
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m_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Channel *chptr = NULL;
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struct membership *msptr;
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int n = 2;
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const char *dest;
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int operspy = 0;
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dest = parv[1];
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if(IsOperSpy(source_p) && *dest == '!')
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{
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dest++;
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operspy = 1;
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if(EmptyString(dest))
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{
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
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me.name, source_p->name, "MODE");
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return 0;
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}
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}
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/* Now, try to find the channel in question */
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if(!IsChanPrefix(*dest))
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{
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/* if here, it has to be a non-channel name */
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user_mode(client_p, source_p, parc, parv);
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return 0;
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}
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if(!check_channel_name(dest))
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{
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sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[1]);
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return 0;
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}
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chptr = find_channel(dest);
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if(chptr == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), parv[1]);
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return 0;
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}
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/* Now know the channel exists */
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if(parc < n + 1)
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{
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if(operspy)
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report_operspy(source_p, "MODE", chptr->chname);
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sendto_one(source_p, form_str(RPL_CHANNELMODEIS),
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me.name, source_p->name, parv[1],
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operspy ? channel_modes(chptr, &me) : channel_modes(chptr, source_p));
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sendto_one(source_p, form_str(RPL_CREATIONTIME),
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me.name, source_p->name, parv[1], chptr->channelts);
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}
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else
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{
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msptr = find_channel_membership(chptr, source_p);
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/* Finish the flood grace period... */
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if(MyClient(source_p) && !IsFloodDone(source_p))
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{
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if(!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
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flood_endgrace(source_p);
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}
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set_channel_mode(client_p, source_p, chptr, msptr, parc - n, parv + n);
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}
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return 0;
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}
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static int
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ms_mode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Channel *chptr;
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chptr = find_channel(parv[1]);
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if(chptr == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), parv[1]);
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return 0;
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}
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set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2);
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return 0;
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}
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static int
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ms_tmode(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Channel *chptr = NULL;
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struct membership *msptr;
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/* Now, try to find the channel in question */
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if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
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{
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sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[2]);
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return 0;
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}
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chptr = find_channel(parv[2]);
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if(chptr == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), parv[2]);
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return 0;
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}
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/* TS is higher, drop it. */
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if(atol(parv[1]) > chptr->channelts)
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return 0;
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if(IsServer(source_p))
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{
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set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3);
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}
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else
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{
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msptr = find_channel_membership(chptr, source_p);
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set_channel_mode(client_p, source_p, chptr, msptr, parc - 3, parv + 3);
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}
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return 0;
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}
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static int
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ms_mlock(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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struct Channel *chptr = NULL;
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/* Now, try to find the channel in question */
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if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
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{
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sendto_one_numeric(source_p, ERR_BADCHANNAME, form_str(ERR_BADCHANNAME), parv[2]);
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return 0;
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}
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chptr = find_channel(parv[2]);
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if(chptr == NULL)
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{
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sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL,
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form_str(ERR_NOSUCHCHANNEL), parv[2]);
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return 0;
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}
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/* TS is higher, drop it. */
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if(atol(parv[1]) > chptr->channelts)
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return 0;
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if(IsServer(source_p))
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set_channel_mlock(client_p, source_p, chptr, parv[3], TRUE);
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return 0;
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}
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static void
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possibly_remove_lower_forward(struct Client *fakesource_p, int mems,
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struct Channel *chptr, rb_dlink_list *banlist, int mchar,
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const char *mask, const char *forward)
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{
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struct Ban *actualBan;
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rb_dlink_node *ptr;
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RB_DLINK_FOREACH(ptr, banlist->head)
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{
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actualBan = ptr->data;
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if(!irccmp(actualBan->banstr, mask) &&
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(actualBan->forward == NULL ||
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irccmp(actualBan->forward, forward) < 0))
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{
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sendto_channel_local(mems, chptr, ":%s MODE %s -%c %s%s%s",
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fakesource_p->name,
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chptr->chname,
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mchar,
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actualBan->banstr,
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actualBan->forward ? "$" : "",
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actualBan->forward ? actualBan->forward : "");
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rb_dlinkDelete(&actualBan->node, banlist);
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free_ban(actualBan);
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return;
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}
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}
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}
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static int
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ms_bmask(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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static char modebuf[BUFSIZE];
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static char parabuf[BUFSIZE];
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struct Channel *chptr;
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rb_dlink_list *banlist;
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char *s, *forward;
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char *t;
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char *mbuf;
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char *pbuf;
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long mode_type;
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int mlen;
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int plen = 0;
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int tlen;
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int arglen;
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int modecount = 0;
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int needcap = NOCAPS;
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int mems;
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struct Client *fakesource_p;
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if(!IsChanPrefix(parv[2][0]) || !check_channel_name(parv[2]))
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return 0;
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if((chptr = find_channel(parv[2])) == NULL)
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return 0;
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/* TS is higher, drop it. */
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if(atol(parv[1]) > chptr->channelts)
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return 0;
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switch (parv[3][0])
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{
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case 'b':
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banlist = &chptr->banlist;
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mode_type = CHFL_BAN;
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mems = ALL_MEMBERS;
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break;
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case 'e':
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banlist = &chptr->exceptlist;
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mode_type = CHFL_EXCEPTION;
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needcap = CAP_EX;
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mems = ONLY_CHANOPS;
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break;
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case 'I':
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banlist = &chptr->invexlist;
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mode_type = CHFL_INVEX;
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needcap = CAP_IE;
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mems = ONLY_CHANOPS;
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break;
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case 'q':
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banlist = &chptr->quietlist;
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mode_type = CHFL_QUIET;
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mems = ALL_MEMBERS;
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break;
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/* maybe we should just blindly propagate this? */
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default:
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return 0;
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}
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parabuf[0] = '\0';
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s = LOCAL_COPY(parv[4]);
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/* Hide connecting server on netburst -- jilles */
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if (ConfigServerHide.flatten_links && !HasSentEob(source_p))
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fakesource_p = &me;
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else
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fakesource_p = source_p;
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mlen = rb_sprintf(modebuf, ":%s MODE %s +", fakesource_p->name, chptr->chname);
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mbuf = modebuf + mlen;
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pbuf = parabuf;
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while(*s == ' ')
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s++;
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/* next char isnt a space, point t to the next one */
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if((t = strchr(s, ' ')) != NULL)
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{
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*t++ = '\0';
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/* double spaces will break the parser */
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while(*t == ' ')
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t++;
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}
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/* couldve skipped spaces and got nothing.. */
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while(!EmptyString(s))
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{
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/* ban with a leading ':' -- this will break the protocol */
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if(*s == ':')
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goto nextban;
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tlen = strlen(s);
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/* I dont even want to begin parsing this.. */
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if(tlen > MODEBUFLEN)
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break;
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if((forward = strchr(s+1, '$')) != NULL)
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{
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*forward++ = '\0';
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if(*forward == '\0')
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tlen--, forward = NULL;
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possibly_remove_lower_forward(fakesource_p, mems,
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chptr, banlist, parv[3][0], s, forward);
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}
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if(add_id(fakesource_p, chptr, s, forward, banlist, mode_type))
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{
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/* this new one wont fit.. */
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if(mlen + MAXMODEPARAMS + plen + tlen > BUFSIZE - 5 ||
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modecount >= MAXMODEPARAMS)
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{
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*mbuf = '\0';
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*(pbuf - 1) = '\0';
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sendto_channel_local(mems, chptr, "%s %s", modebuf, parabuf);
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mbuf = modebuf + mlen;
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pbuf = parabuf;
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plen = modecount = 0;
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}
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if (forward != NULL)
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forward[-1] = '$';
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*mbuf++ = parv[3][0];
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arglen = rb_sprintf(pbuf, "%s ", s);
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pbuf += arglen;
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plen += arglen;
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modecount++;
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}
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nextban:
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s = t;
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if(s != NULL)
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{
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if((t = strchr(s, ' ')) != NULL)
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{
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*t++ = '\0';
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while(*t == ' ')
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t++;
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}
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}
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}
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if(modecount)
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{
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*mbuf = '\0';
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*(pbuf - 1) = '\0';
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sendto_channel_local(mems, chptr, "%s %s", modebuf, parabuf);
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}
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sendto_server(client_p, chptr, CAP_TS6 | needcap, NOCAPS, ":%s BMASK %ld %s %s :%s",
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source_p->id, (long) chptr->channelts, chptr->chname, parv[3], parv[4]);
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return 0;
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}
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