[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
 *
 */

#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"

struct module_modes ModuleModes;

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

		if (MyClient(source_p) && chptr->mode.mode & ModuleModes.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 & ModuleModes.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	*
212380e3	24	*/
	25
	26	#include "stdinc.h"
212380e3	27	#include "channel.h"
212380e3	28	#include "client.h"
13ae2f4b	29	#include "match.h"
212380e3	30	#include "ircd.h"
	31	#include "numeric.h"
	32	#include "send.h"
	33	#include "msg.h"
	34	#include "modules.h"
	35	#include "parse.h"
	36	#include "hash.h"
	37	#include "packet.h"
	38	#include "s_serv.h"
fbd2e5da	39	#include "s_conf.h"
16d8d9fc	40	#include "hook.h"
212380e3	41
1fe75e33 G	42	struct module_modes ModuleModes;
1fe75e33 G	43
212380e3	44	static int m_kick(struct Client , struct Client , int, const char **);
	45	#define mg_kick { m_kick, 3 }
	46
	47	struct Message kick_msgtab = {
	48	"KICK", 0, 0, 0, MFLG_SLOW,
	49	{mg_unreg, mg_kick, mg_kick, mg_kick, mg_ignore, mg_kick}
	50	};
	51
	52	mapi_clist_av1 kick_clist[] = { &kick_msgtab, NULL };
	53
0bba1788	54	DECLARE_MODULE_AV1(kick, NULL, NULL, kick_clist, NULL, NULL, "$Revision: 3317 $");
212380e3	55
	56	/*
	57	** m_kick
212380e3	58	** parv[1] = channel
	59	** parv[2] = client to kick
	60	** parv[3] = kick comment
	61	*/
	62	static int
	63	m_kick(struct Client client_p, struct Client source_p, int parc, const char *parv[])
	64	{
	65	struct membership *msptr;
	66	struct Client *who;
	67	struct Channel *chptr;
	68	int chasing = 0;
	69	char *comment;
	70	const char *name;
	71	char *p = NULL;
2498a1b5	72	char text[10];
212380e3	73	const char *user;
212380e3	74	static char buf[BUFSIZE];
fbd2e5da	75	int is_override = 0;
212380e3	76
	77	if(MyClient(source_p) && !IsFloodDone(source_p))
	78	flood_endgrace(source_p);
	79
212380e3	80	*buf = '\0';
	81	if((p = strchr(parv[1], ',')))
	82	*p = '\0';
	83
	84	name = parv[1];
	85
	86	chptr = find_channel(name);
	87	if(chptr == NULL)
	88	{
	89	sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), name);
	90	return 0;
	91	}
	92
6a520112 G	93	user = parv[2]; /* strtoken(&p2, parv[2], ","); */
	94
	95	if(!(who = find_chasing(source_p, user, &chasing)))
	96	{
	97	return 0;
	98	}
	99
212380e3	100	if(!IsServer(source_p))
	101	{
	102	msptr = find_channel_membership(chptr, source_p);
	103
	104	if((msptr == NULL) && MyConnect(source_p))
	105	{
	106	sendto_one_numeric(source_p, ERR_NOTONCHANNEL,
	107	form_str(ERR_NOTONCHANNEL), name);
	108	return 0;
	109	}
	110
fbd2e5da	111	if(!can_kick_deop(msptr, find_channel_membership(chptr, who)))
212380e3	112	{
	113	if(MyConnect(source_p))
	114	{
03d65f8f	115	if(IsOverride(source_p))
fbd2e5da JH	116	is_override = 1;
	117	else
	118	{
64dd2404	119	sendto_one(source_p, ":%s 482 %s %s :You do not have the proper privledges to kick this user",
fbd2e5da JH	120	me.name, source_p->name, name);
	121	return 0;
	122	}
212380e3	123	}
	124
	125	/* If its a TS 0 channel, do it the old way */
fbd2e5da	126	else if(chptr->channelts == 0)
212380e3	127	{
	128	sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
	129	get_id(&me, source_p), get_id(source_p, source_p), name);
	130	return 0;
	131	}
	132	}
	133
	134	/* Its a user doing a kick, but is not showing as chanop locally
	135	* its also not a user ON -my- server, and the channel has a TS.
	136	* There are two cases we can get to this point then...
	137	*
	138	* 1) connect burst is happening, and for some reason a legit
	139	* op has sent a KICK, but the SJOIN hasn't happened yet or
	140	* been seen. (who knows.. due to lag...)
	141	*
	142	* 2) The channel is desynced. That can STILL happen with TS
	143	*
	144	* Now, the old code roger wrote, would allow the KICK to
	145	* go through. Thats quite legit, but lets weird things like
	146	* KICKS by users who appear not to be chanopped happen,
	147	* or even neater, they appear not to be on the channel.
	148	* This fits every definition of a desync, doesn't it? ;-)
	149	* So I will allow the KICK, otherwise, things are MUCH worse.
	150	* But I will warn it as a possible desync.
	151	*
	152	* -Dianora
	153	*/
	154	}
	155
	156	if((p = strchr(parv[2], ',')))
	157	*p = '\0';
	158
212380e3	159	msptr = find_channel_membership(chptr, who);
	160
	161	if(msptr != NULL)
	162	{
	163	if(MyClient(source_p) && IsService(who))
	164	{
	165	sendto_one(source_p, form_str(ERR_ISCHANSERVICE),
	166	me.name, source_p->name, who->name, chptr->chname);
	167	return 0;
	168	}
	169
1fe75e33	170	if(MyClient(source_p) && chptr->mode.mode & ModuleModes.MODE_NOKICK)
f9e91ece G	171	{
	172	sendto_one_numeric(source_p, ERR_NOKICK,
	173	form_str(ERR_NOKICK),
	174	chptr->chname);
	175	return 0;
	176	}
	177
1fe75e33	178	if (MyClient(source_p) && chptr->mode.mode & ModuleModes.MODE_NOOPERKICK && IsOper(who))
f428b59f JH	179	{
	180	sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
	181	"Overriding KICK from %s on %s in %s (channel is +M)",
	182	source_p->name, who->name, chptr->chname);
	183	sendto_one_numeric(source_p, ERR_ISCHANSERVICE,
	184	"%s %s :Cannot kick IRC operators from that channel.",
	185	who->name, chptr->chname);
	186	return 0;
	187	}
	188
16d8d9fc WP	189	if(MyClient(source_p))
	190	{
	191	hook_data_channel_approval hookdata;
	192
	193	hookdata.client = source_p;
	194	hookdata.chptr = chptr;
	195	hookdata.target = who;
	196	hookdata.approved = 1;
	197
	198	call_hook(h_can_kick, &hookdata);
	199
	200	if (!hookdata.approved)
	201	return 0;
	202	}
	203
0bba1788	204	comment = LOCAL_COPY((EmptyString(parv[3])) ? who->name : parv[3]);
	205	if(strlen(comment) > (size_t) REASONLEN)
	206	comment[REASONLEN] = '\0';
	207
fbd2e5da	208	if(is_override)
34d8ef4d JH	209	{
34d8ef4d JH	210	sendto_wallops_flags(UMODE_WALLOP, &me,
fbd2e5da	211	"%s is overriding KICK [%s] on [%s] [%s]",
e7c1f6a5	212	get_oper_name(source_p), who->name, chptr->chname, comment);
34d8ef4d JH	213	sendto_server(NULL, chptr, NOCAPS, NOCAPS,
34d8ef4d JH	214	":%s WALLOPS :%s is overriding KICK [%s] on [%s] [%s]",
71ea6069	215	me.name, get_oper_name(source_p), who->name, chptr->chname, comment);
34d8ef4d	216	}
fbd2e5da	217
212380e3	218	/* jdc
	219	* - In the case of a server kicking a user (i.e. CLEARCHAN),
	220	* the kick should show up as coming from the server which did
	221	* the kick.
	222	* - Personally, flame and I believe that server kicks shouldn't
	223	* be sent anyways. Just waiting for some oper to abuse it...
	224	*/
	225	if(IsServer(source_p))
	226	sendto_channel_local(ALL_MEMBERS, chptr, ":%s KICK %s %s :%s",
	227	source_p->name, name, who->name, comment);
	228	else
	229	sendto_channel_local(ALL_MEMBERS, chptr,
	230	":%s!%s@%s KICK %s %s :%s",
	231	source_p->name, source_p->username,
	232	source_p->host, name, who->name, comment);
	233
	234	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
	235	":%s KICK %s %s :%s",
	236	use_id(source_p), chptr->chname, use_id(who), comment);
212380e3	237	remove_user_from_channel(msptr);
104becbf	238
2498a1b5	239	rb_snprintf(text, sizeof(text), "K%s", who->id);
f0e0e567 JH	240
f0e0e567 JH	241	/* we don't need to track NOREJOIN stuff unless it's our client being kicked */
1fe75e33	242	if(MyClient(who) && chptr->mode.mode & ModuleModes.MODE_NOREJOIN)
f0e0e567	243	channel_metadata_time_add(chptr, text, rb_current_time(), "KICKNOREJOIN");
212380e3	244	}
	245	else if (MyClient(source_p))
	246	sendto_one_numeric(source_p, ERR_USERNOTINCHANNEL,
	247	form_str(ERR_USERNOTINCHANNEL), user, name);
	248
	249	return 0;
	250	}