modules/core/m_kick.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2014 ircd-hybrid 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
 */

/*! \file m_kick.c
 * \brief Includes required functions for processing the KICK command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "modules.h"
#include "parse.h"
#include "hash.h"
#include "packet.h"
#include "s_serv.h"


/* m_kick()
 *  parv[0] = command
 *  parv[1] = channel
 *  parv[2] = client to kick
 *  parv[3] = kick comment
 */
static int
m_kick(struct Client *source_p, int parc, char *parv[])
{
  struct Client *who;
  struct Channel *chptr;
  char *comment;
  char *name;
  char *p = NULL;
  char *user;
  struct Membership *ms = NULL;
  struct Membership *ms_target;

  if (EmptyString(parv[2]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KICK");
    return 0;
  }

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

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

  name = parv[1];
  if ((p = strchr(name,',')) != NULL)
    *p = '\0';
  if (*name == '\0')
    return 0;

  if ((chptr = hash_find_channel(name)) == NULL)
  {
    sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, name);
    return 0;
  }

  if (!IsServer(source_p) && !HasFlag(source_p, FLAGS_SERVICE))
  {
    if ((ms = find_channel_link(source_p, chptr)) == NULL)
    {
      if (MyConnect(source_p))
      {
        sendto_one_numeric(source_p, &me, ERR_NOTONCHANNEL, name);
        return 0;
      }
    }

    if (!has_member_flags(ms, CHFL_CHANOP|CHFL_HALFOP))
    {
      /* was a user, not a server, and user isn't seen as a chanop here */
      if (MyConnect(source_p))
      {
        /* user on _my_ server, with no chanops.. so go away */
        sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, name);
        return 0;
      }

      if (chptr->channelts == 0)
      {
        /* If its a TS 0 channel, do it the old way */
        sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, 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
       */
    }
  }

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

  if (*user == '\0')
    return 0;

  if ((who = find_chasing(source_p, user)) == NULL)
    return 0;

  if ((ms_target = find_channel_link(who, chptr)) != NULL)
  {
#ifdef HALFOPS
    /* half ops cannot kick other halfops on private channels */
    if (has_member_flags(ms, CHFL_HALFOP) && !has_member_flags(ms, CHFL_CHANOP))
    {
      if (((chptr->mode.mode & MODE_PRIVATE) && has_member_flags(ms_target,
        CHFL_CHANOP|CHFL_HALFOP)) || has_member_flags(ms_target, CHFL_CHANOP))
      {
        sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, name);
        return 0;
      }
    }
#endif

    /* 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, 0, chptr, ":%s KICK %s %s :%s",
                           source_p->name, name, who->name, comment);
    else
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s KICK %s %s :%s",
                           source_p->name, source_p->username,
                           source_p->host, name, who->name, comment);

    sendto_server(source_p, NOCAPS, NOCAPS, ":%s KICK %s %s :%s",
                  source_p->id, chptr->chname, who->id, comment);
    remove_user_from_channel(ms_target);
  }
  else
    sendto_one_numeric(source_p, &me, ERR_USERNOTINCHANNEL, user, name);

  return 0;
}

static struct Message kick_msgtab =
{
  "KICK", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_kick, m_kick, m_ignore, m_kick, m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&kick_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&kick_msgtab);
}

struct module module_entry =
{
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = MODULE_FLAG_CORE
};
Revision:	3192
Committed:	Sun Mar 23 19:46:39 2014 UTC (11 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	6185 byte(s)
Log Message:	- Fixed compile error in ms_sid() - Cleaned up find_chasing(). Removed useless third 'chasing' argument.
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2820	* Copyright (c) 1997-2014 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	2820	/*! \file m_kick.c
23			* \brief Includes required functions for processing the KICK command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "irc_string.h"
33			#include "ircd.h"
34			#include "numeric.h"
35			#include "send.h"
36			#include "modules.h"
37			#include "parse.h"
38			#include "hash.h"
39			#include "packet.h"
40			#include "s_serv.h"
41
42
43			/* m_kick()
44	michael	3096	* parv[0] = command
45	adx	30	* parv[1] = channel
46			* parv[2] = client to kick
47			* parv[3] = kick comment
48			*/
49	michael	2820	static int
50	michael	3156	m_kick(struct Client source_p, int parc, char parv[])
51	adx	30	{
52			struct Client *who;
53			struct Channel *chptr;
54			char *comment;
55			char *name;
56			char *p = NULL;
57			char *user;
58			struct Membership *ms = NULL;
59			struct Membership *ms_target;
60
61	michael	885	if (EmptyString(parv[2]))
62	adx	30	{
63	michael	3109	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KICK");
64	michael	2820	return 0;
65	adx	30	}
66
67			if (MyClient(source_p) && !IsFloodDone(source_p))
68			flood_endgrace(source_p);
69
70	michael	1892	comment = (EmptyString(parv[3])) ? source_p->name : parv[3];
71	adx	30	if (strlen(comment) > (size_t)KICKLEN)
72			comment[KICKLEN] = '\0';
73
74			name = parv[1];
75			if ((p = strchr(name,',')) != NULL)
76			*p = '\0';
77			if (*name == '\0')
78	michael	2820	return 0;
79	adx	30
80			if ((chptr = hash_find_channel(name)) == NULL)
81			{
82	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, name);
83	michael	2820	return 0;
84	adx	30	}
85
86	michael	1219	if (!IsServer(source_p) && !HasFlag(source_p, FLAGS_SERVICE))
87	adx	30	{
88			if ((ms = find_channel_link(source_p, chptr)) == NULL)
89			{
90			if (MyConnect(source_p))
91			{
92	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOTONCHANNEL, name);
93	michael	2820	return 0;
94	adx	30	}
95			}
96
97			if (!has_member_flags(ms, CHFL_CHANOP\|CHFL_HALFOP))
98			{
99			/* was a user, not a server, and user isn't seen as a chanop here */
100			if (MyConnect(source_p))
101			{
102			/* user on _my_ server, with no chanops.. so go away */
103	michael	3109	sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, name);
104	michael	2820	return 0;
105	adx	30	}
106
107			if (chptr->channelts == 0)
108			{
109	michael	2820	/* If its a TS 0 channel, do it the old way */
110	michael	3109	sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, name);
111	michael	2820	return 0;
112	adx	30	}
113
114			/* Its a user doing a kick, but is not showing as chanop locally
115			* its also not a user ON -my- server, and the channel has a TS.
116			* There are two cases we can get to this point then...
117			*
118			* 1) connect burst is happening, and for some reason a legit
119	michael	2820	* op has sent a KICK, but the SJOIN hasn't happened yet or
120	adx	30	* been seen. (who knows.. due to lag...)
121			*
122			* 2) The channel is desynced. That can STILL happen with TS
123	michael	2820	*
124			* Now, the old code roger wrote, would allow the KICK to
125	adx	30	* go through. Thats quite legit, but lets weird things like
126			* KICKS by users who appear not to be chanopped happen,
127			* or even neater, they appear not to be on the channel.
128			* This fits every definition of a desync, doesn't it? ;-)
129			* So I will allow the KICK, otherwise, things are MUCH worse.
130			* But I will warn it as a possible desync.
131			*
132			* -Dianora
133			*/
134			}
135			}
136
137			user = parv[2];
138			if ((p = strchr(user, ',')) != NULL)
139			*p = '\0';
140
141			if (*user == '\0')
142	michael	2820	return 0;
143	adx	30
144	michael	3192	if ((who = find_chasing(source_p, user)) == NULL)
145	michael	2820	return 0;
146	adx	30
147			if ((ms_target = find_channel_link(who, chptr)) != NULL)
148			{
149			#ifdef HALFOPS
150			/* half ops cannot kick other halfops on private channels */
151			if (has_member_flags(ms, CHFL_HALFOP) && !has_member_flags(ms, CHFL_CHANOP))
152			{
153			if (((chptr->mode.mode & MODE_PRIVATE) && has_member_flags(ms_target,
154			CHFL_CHANOP\|CHFL_HALFOP)) \|\| has_member_flags(ms_target, CHFL_CHANOP))
155			{
156	michael	3109	sendto_one_numeric(source_p, &me, ERR_CHANOPRIVSNEEDED, name);
157	michael	2820	return 0;
158	adx	30	}
159			}
160			#endif
161
162			/* jdc
163			* - In the case of a server kicking a user (i.e. CLEARCHAN),
164			* the kick should show up as coming from the server which did
165			* the kick.
166			* - Personally, flame and I believe that server kicks shouldn't
167			* be sent anyways. Just waiting for some oper to abuse it...
168			*/
169			if (IsServer(source_p))
170	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s KICK %s %s :%s",
171	adx	30	source_p->name, name, who->name, comment);
172			else
173	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s KICK %s %s :%s",
174	adx	30	source_p->name, source_p->username,
175			source_p->host, name, who->name, comment);
176
177	michael	3156	sendto_server(source_p, NOCAPS, NOCAPS, ":%s KICK %s %s :%s",
178	michael	3186	source_p->id, chptr->chname, who->id, comment);
179	adx	30	remove_user_from_channel(ms_target);
180			}
181			else
182	michael	3109	sendto_one_numeric(source_p, &me, ERR_USERNOTINCHANNEL, user, name);
183
184	michael	2820	return 0;
185	adx	30	}
186	michael	1230
187	michael	2820	static struct Message kick_msgtab =
188			{
189	michael	1230	"KICK", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
190	michael	2820	{ m_unregistered, m_kick, m_kick, m_ignore, m_kick, m_ignore }
191	michael	1230	};
192
193			static void
194			module_init(void)
195			{
196			mod_add_cmd(&kick_msgtab);
197			}
198
199			static void
200			module_exit(void)
201			{
202			mod_del_cmd(&kick_msgtab);
203			}
204
205	michael	2820	struct module module_entry =
206			{
207	michael	1230	.node = { NULL, NULL, NULL },
208			.name = NULL,
209			.version = "$Revision$",
210			.handle = NULL,
211			.modinit = module_init,
212			.modexit = module_exit,
213			.flags = MODULE_FLAG_CORE
214			};