[irc/rqf/shadowircd.git] / modules / core / m_kick.c

/*
 *  ircd-ratbox: A slightly useful ircd.
 *  m_kick.c: Kicks a user from a channel.
 *
 *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
 *  Copyright (C) 1996-2002 Hybrid Development Team
 *  Copyright (C) 2002-2005 ircd-ratbox development team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: m_kick.c 3317 2007-03-28 23:17:06Z jilles $
 */

#include "stdinc.h"
#include "channel.h"
#include "client.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "msg.h"
#include "modules.h"
#include "parse.h"
#include "hash.h"
#include "packet.h"
#include "s_serv.h"
#include "s_conf.h"
#include "hook.h"

static int m_kick(struct Client *, struct Client *, int, const char **);
#define mg_kick { m_kick, 3 }

struct Message kick_msgtab = {
	"KICK", 0, 0, 0, MFLG_SLOW,
	{mg_unreg, mg_kick, mg_kick, mg_kick, mg_ignore, mg_kick}
};

mapi_clist_av1 kick_clist[] = { &kick_msgtab, NULL };

DECLARE_MODULE_AV1(kick, NULL, NULL, kick_clist, NULL, NULL, "$Revision: 3317 $");

/*
** m_kick
**      parv[1] = channel
**      parv[2] = client to kick
**      parv[3] = kick comment
*/
static int
m_kick(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
	struct membership *msptr;
	struct Client *who;
	struct Channel *chptr;
	int chasing = 0;
	char *comment;
	const char *name;
	char *p = NULL;
	char text[10];
	const char *user;
	static char buf[BUFSIZE];
	int is_override = 0;

	if(MyClient(source_p) && !IsFloodDone(source_p))
		flood_endgrace(source_p);

	*buf = '\0';
	if((p = strchr(parv[1], ',')))
		*p = '\0';

	name = parv[1];

	chptr = find_channel(name);
	if(chptr == NULL)
	{
		sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), name);
		return 0;
	}

	user = parv[2];		/* strtoken(&p2, parv[2], ","); */

	if(!(who = find_chasing(source_p, user, &chasing)))
	{
		return 0;
	}

	if(!IsServer(source_p))
	{
		msptr = find_channel_membership(chptr, source_p);

		if((msptr == NULL) && MyConnect(source_p))
		{
			sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
					   form_str(ERR_NOTONCHANNEL), name);
			return 0;
		}

		if(!can_kick_deop(msptr, find_channel_membership(chptr, who)))
		{
			if(MyConnect(source_p))
			{
				if(IsOverride(source_p))
					is_override = 1;
				else
				{
					sendto_one(source_p, ":%s 482 %s %s :You do not have the proper privledges to kick this user",
							me.name, source_p->name, name);
					return 0;
				}
			}

			/* If its a TS 0 channel, do it the old way */
			else if(chptr->channelts == 0)
			{
				sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
					   get_id(&me, source_p), get_id(source_p, source_p), name);
				return 0;
			}
		}

		/* Its a user doing a kick, but is not showing as chanop locally
		 * its also not a user ON -my- server, and the channel has a TS.
		 * There are two cases we can get to this point then...
		 *
		 *     1) connect burst is happening, and for some reason a legit
		 *        op has sent a KICK, but the SJOIN hasn't happened yet or 
		 *        been seen. (who knows.. due to lag...)
		 *
		 *     2) The channel is desynced. That can STILL happen with TS
		 *        
		 *     Now, the old code roger wrote, would allow the KICK to 
		 *     go through. Thats quite legit, but lets weird things like
		 *     KICKS by users who appear not to be chanopped happen,
		 *     or even neater, they appear not to be on the channel.
		 *     This fits every definition of a desync, doesn't it? ;-)
		 *     So I will allow the KICK, otherwise, things are MUCH worse.
		 *     But I will warn it as a possible desync.
		 *
		 *     -Dianora
		 */
	}

	if((p = strchr(parv[2], ',')))
		*p = '\0';

	msptr = find_channel_membership(chptr, who);

	if(msptr != NULL)
	{
		if(MyClient(source_p) && IsService(who))
		{
			sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
				   me.name, source_p->name, who->name, chptr->chname);
			return 0;
		}

		if(MyClient(source_p) && chptr->mode.mode & MODE_NOKICK)
		{
			sendto_one_numeric(source_p, ERR_NOKICK,
					form_str(ERR_NOKICK),
					chptr->chname);
			return 0;
		}

		if (MyClient(source_p) && chptr->mode.mode & MODE_NOOPERKICK && IsOper(who))
		{
			sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
					"Overriding KICK from %s on %s in %s (channel is +M)",
					source_p->name, who->name, chptr->chname);
			sendto_one_numeric(source_p, ERR_ISCHANSERVICE,
					"%s %s :Cannot kick IRC operators from that channel.",
					who->name, chptr->chname);
			return 0;
		}

		if(MyClient(source_p))
		{
			hook_data_channel_approval hookdata;

			hookdata.client = source_p;
			hookdata.chptr = chptr;
			hookdata.target = who;
			hookdata.approved = 1;

			call_hook(h_can_kick, &hookdata);

			if (!hookdata.approved)
				return 0;
		}

		comment = LOCAL_COPY((EmptyString(parv[3])) ? who->name : parv[3]);
		if(strlen(comment) > (size_t) REASONLEN)
			comment[REASONLEN] = '\0';

		if(is_override)
		{
			sendto_wallops_flags(UMODE_WALLOP, &me,
					"%s is overriding KICK [%s] on [%s] [%s]",
					get_oper_name(source_p), who->name, chptr->chname, comment);
			sendto_server(NULL, chptr, NOCAPS, NOCAPS,
					":%s WALLOPS :%s is overriding KICK [%s] on [%s] [%s]",
					me.name, get_oper_name(source_p), who->name, chptr->chname, comment);
		}

		/* jdc
		 * - In the case of a server kicking a user (i.e. CLEARCHAN),
		 *   the kick should show up as coming from the server which did
		 *   the kick.
		 * - Personally, flame and I believe that server kicks shouldn't
		 *   be sent anyways.  Just waiting for some oper to abuse it...
		 */
		if(IsServer(source_p))
			sendto_channel_local(ALL_MEMBERS, chptr, ":%s KICK %s %s :%s",
					     source_p->name, name, who->name, comment);
		else
			sendto_channel_local(ALL_MEMBERS, chptr,
					     ":%s!%s@%s KICK %s %s :%s",
					     source_p->name, source_p->username,
					     source_p->host, name, who->name, comment);

		sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
			      ":%s KICK %s %s :%s",
			      use_id(source_p), chptr->chname, use_id(who), comment);
		remove_user_from_channel(msptr);

		rb_snprintf(text, sizeof(text), "K%s", who->id);

		/* we don't need to track NOREJOIN stuff unless it's our client being kicked */
		if(MyClient(who) && chptr->mode.mode & MODE_NOREJOIN)
			channel_metadata_time_add(chptr, text, rb_current_time(), "KICKNOREJOIN");
	}
	else if (MyClient(source_p))
		sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
				   form_str(ERR_USERNOTINCHANNEL), user, name);

	return 0;
}
Commit	Line	Data
212380e3	1	/*
	2	* ircd-ratbox: A slightly useful ircd.
	3	* m_kick.c: Kicks a user from a channel.
	4	*
	5	* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
	6	* Copyright (C) 1996-2002 Hybrid Development Team
	7	* Copyright (C) 2002-2005 ircd-ratbox development team
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
	22	* USA
	23	*
0bba1788	24	* $Id: m_kick.c 3317 2007-03-28 23:17:06Z jilles $
212380e3	25	*/
	26
	27	#include "stdinc.h"
212380e3	28	#include "channel.h"
212380e3	29	#include "client.h"
13ae2f4b	30	#include "match.h"
212380e3	31	#include "ircd.h"
	32	#include "numeric.h"
	33	#include "send.h"
	34	#include "msg.h"
	35	#include "modules.h"
	36	#include "parse.h"
	37	#include "hash.h"
	38	#include "packet.h"
	39	#include "s_serv.h"
fbd2e5da	40	#include "s_conf.h"
16d8d9fc	41	#include "hook.h"
212380e3	42
	43	static int m_kick(struct Client , struct Client , int, const char **);
	44	#define mg_kick { m_kick, 3 }
	45
	46	struct Message kick_msgtab = {
	47	"KICK", 0, 0, 0, MFLG_SLOW,
	48	{mg_unreg, mg_kick, mg_kick, mg_kick, mg_ignore, mg_kick}
	49	};
	50
	51	mapi_clist_av1 kick_clist[] = { &kick_msgtab, NULL };
	52
0bba1788	53	DECLARE_MODULE_AV1(kick, NULL, NULL, kick_clist, NULL, NULL, "$Revision: 3317 $");
212380e3	54
	55	/*
	56	** m_kick
212380e3	57	** parv[1] = channel
	58	** parv[2] = client to kick
	59	** parv[3] = kick comment
	60	*/
	61	static int
	62	m_kick(struct Client client_p, struct Client source_p, int parc, const char *parv[])
	63	{
	64	struct membership *msptr;
	65	struct Client *who;
	66	struct Channel *chptr;
	67	int chasing = 0;
	68	char *comment;
	69	const char *name;
	70	char *p = NULL;
2498a1b5	71	char text[10];
212380e3	72	const char *user;
212380e3	73	static char buf[BUFSIZE];
fbd2e5da	74	int is_override = 0;
212380e3	75
	76	if(MyClient(source_p) && !IsFloodDone(source_p))
	77	flood_endgrace(source_p);
	78
212380e3	79	*buf = '\0';
	80	if((p = strchr(parv[1], ',')))
	81	*p = '\0';
	82
	83	name = parv[1];
	84
	85	chptr = find_channel(name);
	86	if(chptr == NULL)
	87	{
	88	sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), name);
	89	return 0;
	90	}
	91
6a520112 G	92	user = parv[2]; /* strtoken(&p2, parv[2], ","); */
	93
	94	if(!(who = find_chasing(source_p, user, &chasing)))
	95	{
	96	return 0;
	97	}
	98
212380e3	99	if(!IsServer(source_p))
	100	{
	101	msptr = find_channel_membership(chptr, source_p);
	102
	103	if((msptr == NULL) && MyConnect(source_p))
	104	{
	105	sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
	106	form_str(ERR_NOTONCHANNEL), name);
	107	return 0;
	108	}
	109
fbd2e5da	110	if(!can_kick_deop(msptr, find_channel_membership(chptr, who)))
212380e3	111	{
	112	if(MyConnect(source_p))
	113	{
03d65f8f	114	if(IsOverride(source_p))
fbd2e5da JH	115	is_override = 1;
	116	else
	117	{
64dd2404	118	sendto_one(source_p, ":%s 482 %s %s :You do not have the proper privledges to kick this user",
fbd2e5da JH	119	me.name, source_p->name, name);
	120	return 0;
	121	}
212380e3	122	}
	123
	124	/* If its a TS 0 channel, do it the old way */
fbd2e5da	125	else if(chptr->channelts == 0)
212380e3	126	{
	127	sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
	128	get_id(&me, source_p), get_id(source_p, source_p), name);
	129	return 0;
	130	}
	131	}
	132
	133	/* Its a user doing a kick, but is not showing as chanop locally
	134	* its also not a user ON -my- server, and the channel has a TS.
	135	* There are two cases we can get to this point then...
	136	*
	137	* 1) connect burst is happening, and for some reason a legit
	138	* op has sent a KICK, but the SJOIN hasn't happened yet or
	139	* been seen. (who knows.. due to lag...)
	140	*
	141	* 2) The channel is desynced. That can STILL happen with TS
	142	*
	143	* Now, the old code roger wrote, would allow the KICK to
	144	* go through. Thats quite legit, but lets weird things like
	145	* KICKS by users who appear not to be chanopped happen,
	146	* or even neater, they appear not to be on the channel.
	147	* This fits every definition of a desync, doesn't it? ;-)
	148	* So I will allow the KICK, otherwise, things are MUCH worse.
	149	* But I will warn it as a possible desync.
	150	*
	151	* -Dianora
	152	*/
	153	}
	154
	155	if((p = strchr(parv[2], ',')))
	156	*p = '\0';
	157
212380e3	158	msptr = find_channel_membership(chptr, who);
	159
	160	if(msptr != NULL)
	161	{
	162	if(MyClient(source_p) && IsService(who))
	163	{
	164	sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
	165	me.name, source_p->name, who->name, chptr->chname);
	166	return 0;
	167	}
	168
f9e91ece G	169	if(MyClient(source_p) && chptr->mode.mode & MODE_NOKICK)
	170	{
	171	sendto_one_numeric(source_p, ERR_NOKICK,
	172	form_str(ERR_NOKICK),
	173	chptr->chname);
	174	return 0;
	175	}
	176
f428b59f JH	177	if (MyClient(source_p) && chptr->mode.mode & MODE_NOOPERKICK && IsOper(who))
	178	{
	179	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	180	"Overriding KICK from %s on %s in %s (channel is +M)",
	181	source_p->name, who->name, chptr->chname);
	182	sendto_one_numeric(source_p, ERR_ISCHANSERVICE,
	183	"%s %s :Cannot kick IRC operators from that channel.",
	184	who->name, chptr->chname);
	185	return 0;
	186	}
	187
16d8d9fc WP	188	if(MyClient(source_p))
	189	{
	190	hook_data_channel_approval hookdata;
	191
	192	hookdata.client = source_p;
	193	hookdata.chptr = chptr;
	194	hookdata.target = who;
	195	hookdata.approved = 1;
	196
	197	call_hook(h_can_kick, &hookdata);
	198
	199	if (!hookdata.approved)
	200	return 0;
	201	}
	202
0bba1788	203	comment = LOCAL_COPY((EmptyString(parv[3])) ? who->name : parv[3]);
	204	if(strlen(comment) > (size_t) REASONLEN)
	205	comment[REASONLEN] = '\0';
	206
fbd2e5da	207	if(is_override)
34d8ef4d JH	208	{
34d8ef4d JH	209	sendto_wallops_flags(UMODE_WALLOP, &me,
fbd2e5da	210	"%s is overriding KICK [%s] on [%s] [%s]",
e7c1f6a5	211	get_oper_name(source_p), who->name, chptr->chname, comment);
34d8ef4d JH	212	sendto_server(NULL, chptr, NOCAPS, NOCAPS,
34d8ef4d JH	213	":%s WALLOPS :%s is overriding KICK [%s] on [%s] [%s]",
71ea6069	214	me.name, get_oper_name(source_p), who->name, chptr->chname, comment);
34d8ef4d	215	}
fbd2e5da	216
212380e3	217	/* jdc
	218	* - In the case of a server kicking a user (i.e. CLEARCHAN),
	219	* the kick should show up as coming from the server which did
	220	* the kick.
	221	* - Personally, flame and I believe that server kicks shouldn't
	222	* be sent anyways. Just waiting for some oper to abuse it...
	223	*/
	224	if(IsServer(source_p))
	225	sendto_channel_local(ALL_MEMBERS, chptr, ":%s KICK %s %s :%s",
	226	source_p->name, name, who->name, comment);
	227	else
	228	sendto_channel_local(ALL_MEMBERS, chptr,
	229	":%s!%s@%s KICK %s %s :%s",
	230	source_p->name, source_p->username,
	231	source_p->host, name, who->name, comment);
	232
	233	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
	234	":%s KICK %s %s :%s",
	235	use_id(source_p), chptr->chname, use_id(who), comment);
212380e3	236	remove_user_from_channel(msptr);
104becbf	237
2498a1b5	238	rb_snprintf(text, sizeof(text), "K%s", who->id);
f0e0e567 JH	239
	240	/* we don't need to track NOREJOIN stuff unless it's our client being kicked */
	241	if(MyClient(who) && chptr->mode.mode & MODE_NOREJOIN)
	242	channel_metadata_time_add(chptr, text, rb_current_time(), "KICKNOREJOIN");
212380e3	243	}
	244	else if (MyClient(source_p))
	245	sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
	246	form_str(ERR_USERNOTINCHANNEL), user, name);
	247
	248	return 0;
	249	}