modules/core/m_kick.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_kick.c: Kicks a user from a channel.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "handlers.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 "msg.h"
#include "modules.h"
#include "parse.h"
#include "hash.h"
#include "packet.h"
#include "s_serv.h"


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

  if (!MyConnect(source_p) && IsCapable(source_p->from, CAP_TS6) && HasID(source_p))
  {
    from = me.id;
    to = source_p->id;
  }
  else
  {
    from = me.name;
    to = source_p->name;
  }

  if (EmptyString(parv[2]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               from, to, "KICK");
    return;
  }

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

  comment = (EmptyString(parv[3])) ? parv[2] : parv[3];
  if (strlen(comment) > (size_t)KICKLEN)
    comment[KICKLEN] = '\0';

  name = parv[1];
  while (*name == ',')
    name++;

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

  if ((chptr = hash_find_channel(name)) == NULL)
  {
    sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
               from, to, name);
    return;
  }

  if (!IsServer(source_p) && !HasFlag(source_p, FLAGS_SERVICE))
  {
    if ((ms = find_channel_link(source_p, chptr)) == NULL)
    {
      if (MyConnect(source_p))
      {
        sendto_one(source_p, form_str(ERR_NOTONCHANNEL),
                   me.name, source_p->name, name);
        return;
      }
    }

    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(source_p, form_str(ERR_CHANOPRIVSNEEDED),
                   me.name, source_p->name, name);
        return;
      }

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

      /* 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];

  while (*user == ',')
    user++;

  if ((p = strchr(user, ',')) != NULL)
    *p = '\0';

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

  if ((who = find_chasing(client_p, source_p, user, &chasing)) == NULL)
    return;

  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(source_p, form_str(ERR_CHANOPRIVSNEEDED),
                   me.name, source_p->name, name);
        return;
      }
    }
#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(client_p, chptr, CAP_TS6, NOCAPS,
                  ":%s KICK %s %s :%s",
                  ID(source_p), chptr->chname, ID(who), comment);
    sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                  ":%s KICK %s %s :%s", source_p->name, chptr->chname,
                  who->name, comment);

    remove_user_from_channel(ms_target);
  }
  else
    sendto_one(source_p, form_str(ERR_USERNOTINCHANNEL),
               from, to, user, name);
}

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:	1230
Committed:	Thu Sep 22 19:41:19 2011 UTC (14 years, 10 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/core/m_kick.c*
File size:	6924 byte(s)
Log Message:	- cleanup module loader. Make module api more flexible
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_kick.c: Kicks a user from a channel.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26	michael	1011	#include "list.h"
27	adx	30	#include "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "irc_string.h"
32			#include "ircd.h"
33			#include "numeric.h"
34			#include "send.h"
35			#include "msg.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			* parv[0] = sender prefix
45			* parv[1] = channel
46			* parv[2] = client to kick
47			* parv[3] = kick comment
48			*/
49			static void
50			m_kick(struct Client client_p, struct Client source_p,
51			int parc, char *parv[])
52			{
53			struct Client *who;
54			struct Channel *chptr;
55			int chasing = 0;
56			char *comment;
57			char *name;
58			char *p = NULL;
59			char *user;
60			const char from, to;
61			struct Membership *ms = NULL;
62			struct Membership *ms_target;
63
64			if (!MyConnect(source_p) && IsCapable(source_p->from, CAP_TS6) && HasID(source_p))
65			{
66			from = me.id;
67			to = source_p->id;
68			}
69			else
70			{
71			from = me.name;
72			to = source_p->name;
73			}
74
75	michael	885	if (EmptyString(parv[2]))
76	adx	30	{
77			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
78			from, to, "KICK");
79			return;
80			}
81
82			if (MyClient(source_p) && !IsFloodDone(source_p))
83			flood_endgrace(source_p);
84
85			comment = (EmptyString(parv[3])) ? parv[2] : parv[3];
86			if (strlen(comment) > (size_t)KICKLEN)
87			comment[KICKLEN] = '\0';
88
89			name = parv[1];
90			while (*name == ',')
91			name++;
92
93			if ((p = strchr(name,',')) != NULL)
94			*p = '\0';
95			if (*name == '\0')
96			return;
97
98			if ((chptr = hash_find_channel(name)) == NULL)
99			{
100			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
101			from, to, name);
102			return;
103			}
104
105	michael	1219	if (!IsServer(source_p) && !HasFlag(source_p, FLAGS_SERVICE))
106	adx	30	{
107			if ((ms = find_channel_link(source_p, chptr)) == NULL)
108			{
109			if (MyConnect(source_p))
110			{
111			sendto_one(source_p, form_str(ERR_NOTONCHANNEL),
112			me.name, source_p->name, name);
113			return;
114			}
115			}
116
117			if (!has_member_flags(ms, CHFL_CHANOP\|CHFL_HALFOP))
118			{
119			/* was a user, not a server, and user isn't seen as a chanop here */
120			if (MyConnect(source_p))
121			{
122			/* user on _my_ server, with no chanops.. so go away */
123			sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
124			me.name, source_p->name, name);
125			return;
126			}
127
128			if (chptr->channelts == 0)
129			{
130			/* If its a TS 0 channel, do it the old way */
131			sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
132			from, to, name);
133			return;
134			}
135
136			/* Its a user doing a kick, but is not showing as chanop locally
137			* its also not a user ON -my- server, and the channel has a TS.
138			* There are two cases we can get to this point then...
139			*
140			* 1) connect burst is happening, and for some reason a legit
141			* op has sent a KICK, but the SJOIN hasn't happened yet or
142			* been seen. (who knows.. due to lag...)
143			*
144			* 2) The channel is desynced. That can STILL happen with TS
145			*
146			* Now, the old code roger wrote, would allow the KICK to
147			* go through. Thats quite legit, but lets weird things like
148			* KICKS by users who appear not to be chanopped happen,
149			* or even neater, they appear not to be on the channel.
150			* This fits every definition of a desync, doesn't it? ;-)
151			* So I will allow the KICK, otherwise, things are MUCH worse.
152			* But I will warn it as a possible desync.
153			*
154			* -Dianora
155			*/
156			}
157			}
158
159			user = parv[2];
160
161			while (*user == ',')
162			user++;
163
164			if ((p = strchr(user, ',')) != NULL)
165			*p = '\0';
166
167			if (*user == '\0')
168			return;
169
170			if ((who = find_chasing(client_p, source_p, user, &chasing)) == NULL)
171			return;
172
173			if ((ms_target = find_channel_link(who, chptr)) != NULL)
174			{
175			#ifdef HALFOPS
176			/* half ops cannot kick other halfops on private channels */
177			if (has_member_flags(ms, CHFL_HALFOP) && !has_member_flags(ms, CHFL_CHANOP))
178			{
179			if (((chptr->mode.mode & MODE_PRIVATE) && has_member_flags(ms_target,
180			CHFL_CHANOP\|CHFL_HALFOP)) \|\| has_member_flags(ms_target, CHFL_CHANOP))
181			{
182			sendto_one(source_p, form_str(ERR_CHANOPRIVSNEEDED),
183			me.name, source_p->name, name);
184			return;
185			}
186			}
187			#endif
188
189			/* jdc
190			* - In the case of a server kicking a user (i.e. CLEARCHAN),
191			* the kick should show up as coming from the server which did
192			* the kick.
193			* - Personally, flame and I believe that server kicks shouldn't
194			* be sent anyways. Just waiting for some oper to abuse it...
195			*/
196			if (IsServer(source_p))
197	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s KICK %s %s :%s",
198	adx	30	source_p->name, name, who->name, comment);
199			else
200	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s KICK %s %s :%s",
201	adx	30	source_p->name, source_p->username,
202			source_p->host, name, who->name, comment);
203
204	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
205	adx	30	":%s KICK %s %s :%s",
206			ID(source_p), chptr->chname, ID(who), comment);
207	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
208	adx	30	":%s KICK %s %s :%s", source_p->name, chptr->chname,
209			who->name, comment);
210
211			remove_user_from_channel(ms_target);
212			}
213			else
214			sendto_one(source_p, form_str(ERR_USERNOTINCHANNEL),
215			from, to, user, name);
216			}
217	michael	1230
218			static struct Message kick_msgtab = {
219			"KICK", 0, 0, 3, MAXPARA, MFLG_SLOW, 0,
220			{m_unregistered, m_kick, m_kick, m_ignore, m_kick, m_ignore}
221			};
222
223			static void
224			module_init(void)
225			{
226			mod_add_cmd(&kick_msgtab);
227			}
228
229			static void
230			module_exit(void)
231			{
232			mod_del_cmd(&kick_msgtab);
233			}
234
235			struct module module_entry = {
236			.node = { NULL, NULL, NULL },
237			.name = NULL,
238			.version = "$Revision$",
239			.handle = NULL,
240			.modinit = module_init,
241			.modexit = module_exit,
242			.flags = MODULE_FLAG_CORE
243			};