b860ad5ffa
We were ending the flood grace period for any channel mode command other than `MODE #foo [bq]` by means of a hardcoded check. I've moved that to after we parse the mode string, so we can correctly identify all requests to change modes and end the grace period on exactly those. It would have been entirely possible to move the check even further down and flood_endgrace on only mode commands that *actually* change modes, but I don't like the idea of making it sensitive to external conditions.
420 lines
10 KiB
C
420 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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#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 const char mode_desc[] =
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"Provides the MODE and MLOCK client and server commands, and TS6 server-to-server TMODE and BMASK commands";
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static void m_mode(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void ms_mode(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void ms_tmode(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void ms_mlock(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void ms_bmask(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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struct Message mode_msgtab = {
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"MODE", 0, 0, 0, 0,
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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, 0,
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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, 0,
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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, 0,
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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_AV2(mode, NULL, NULL, mode_clist, NULL, NULL, NULL, NULL, mode_desc);
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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 void
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m_mode(struct MsgBuf *msgbuf_p, 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;
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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;
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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;
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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;
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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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set_channel_mode(client_p, source_p, chptr, msptr, parc - n, parv + n);
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}
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}
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static void
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ms_mode(struct MsgBuf *msgbuf_p, 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;
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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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}
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static void
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ms_tmode(struct MsgBuf *msgbuf_p, 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;
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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;
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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;
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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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}
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static void
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ms_mlock(struct MsgBuf *msgbuf_p, 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;
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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;
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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;
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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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}
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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(fakesource_p, 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 void
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ms_bmask(struct MsgBuf *msgbuf_p, 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;
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if((chptr = find_channel(parv[2])) == NULL)
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return;
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/* TS is higher, drop it. */
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if(atol(parv[1]) > chptr->channelts)
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return;
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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;
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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 = 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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else
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possibly_remove_lower_forward(fakesource_p,
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mems, chptr, banlist,
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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(fakesource_p, 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 = 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(fakesource_p, 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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}
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