ircd-hybrid-7.3/contrib/m_clearchan.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_clearchan.c: Performs a channel takeover
 *
 *  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 "tools.h"
#include "handlers.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_log.h"
#include "s_serv.h"
#include "send.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "hash.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "list.h"
#include "s_conf.h"
#include "common.h"

static void mo_clearchan(struct Client *, struct Client *, int, char *[]);
static void kick_list(struct Client *, struct Channel *);
static void remove_our_modes(struct Channel *);
static void remove_a_mode(struct Channel *, int, char);

struct Message clearchan_msgtab = {
  "CLEARCHAN", 0, 0, 2, 0, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, m_ignore, m_ignore, mo_clearchan, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&clearchan_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&clearchan_msgtab);
}

const char *_version = "$Revision$";
#endif

/*
** mo_clearchan
**      parv[0] = sender prefix
**      parv[1] = channel
*/
static void
mo_clearchan(struct Client *client_p, struct Client *source_p,
             int parc, char *parv[])
{
  struct Channel *chptr = NULL;

  /* admins only */
  if (!IsAdmin(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
               me.name, source_p->name);
    return;
  }

  if ((chptr = hash_find_channel(parv[1])) == NULL)
  {
    sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
               me.name, source_p->name, parv[1]);
    return;
  }

  if (IsMember(source_p, chptr))
  {
    sendto_one(source_p, ":%s NOTICE %s :*** Please part %s before using CLEARCHAN",
               me.name, source_p->name, chptr->chname);
    return;
  }

  sendto_wallops_flags(UMODE_WALLOP, &me, "CLEARCHAN called for [%s] by %s!%s@%s",
                       chptr->chname, source_p->name, source_p->username, source_p->host);
  sendto_server(NULL, NULL, NOCAPS, NOCAPS,
                ":%s WALLOPS :CLEARCHAN called for [%s] by %s!%s@%s",
                me.name, chptr->chname, source_p->name, source_p->username,
                source_p->host);
  ilog(L_NOTICE, "CLEARCHAN called for [%s] by %s!%s@%s",
       chptr->chname, source_p->name, source_p->username, source_p->host);

  /*
   * Kill all the modes we have about the channel..
   * making everyone a peon
   */  
  remove_our_modes(chptr);

  /* SJOIN the user to give them ops, and lock the channel */
  sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
                ":%s JOIN %lu %s +ntsi",
                source_p->id, (unsigned long)(chptr->channelts - 1),
                chptr->chname);
  sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
                ":%s SJOIN %lu %s +ntsi :@%s",
                me.name, (unsigned long)(chptr->channelts - 1),
                chptr->chname, source_p->name);
  sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN %s",
                       source_p->name, source_p->username,
                       source_p->host, chptr->chname);
  sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +o %s",
                       me.name, chptr->chname, source_p->name);


  /*
   * Take the TS down by 1, so we don't see the channel taken over
   * again.
   */
  if (chptr->channelts)
    --chptr->channelts;

  chptr->mode.mode = MODE_SECRET | MODE_TOPICLIMIT |
                     MODE_INVITEONLY | MODE_NOPRIVMSGS;
  free_topic(chptr);
  chptr->mode.key[0] = '\0';

  /* Kick the users out and join the oper */
  kick_list(source_p, chptr);
}

static void
kick_list(struct Client *source_p, struct Channel *chptr)
{
  dlink_node *ptr = NULL, *ptr_next = NULL;
  struct Membership *ms = NULL;

  DLINK_FOREACH(ptr, chptr->members.head)
  {
    ms = ptr->data;

    sendto_channel_local(ALL_MEMBERS, NO, chptr,
                         ":%s!%s@%s KICK %s %s CLEARCHAN",
                         source_p->name, source_p->username,
                         source_p->host, chptr->chname, ms->client_p->name);
    sendto_server(NULL, chptr, NOCAPS, NOCAPS,
                  ":%s KICK %s %s :CLEARCHAN", source_p->name,
                  chptr->chname, ms->client_p->name);
  }

  add_user_to_channel(chptr, source_p, CHFL_CHANOP, NO);

  DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
  {
    ms = ptr->data;

    if (ms->client_p != source_p)
      remove_user_from_channel(ms);
  }

  /*
   * Join the user themselves to the channel down here, so they dont see a nicklist
   * or people being kicked
   */
  sendto_one(source_p, ":%s!%s@%s JOIN %s",
             source_p->name, source_p->username,
             source_p->host, chptr->chname);
  channel_member_names(source_p, chptr, 1);
}

/* remove_our_modes()
 *
 * inputs       - hide from ops or not int flag
 *              - pointer to channel to remove modes from
 *              - client pointer
 * output       - NONE
 * side effects - Go through the local members, remove all their
 *                chanop modes etc., this side lost the TS.
 */
static void
remove_our_modes(struct Channel *chptr)
{
  remove_a_mode(chptr, CHFL_CHANOP, 'o');
#ifdef HALFOPS
  remove_a_mode(chptr, CHFL_HALFOP, 'h');
#endif
  remove_a_mode(chptr, CHFL_VOICE, 'v');

  /* Clear all +beI modes */
  free_channel_list(&chptr->banlist);
  free_channel_list(&chptr->exceptlist);
  free_channel_list(&chptr->invexlist);
}

/* remove_a_mode()
 *
 * inputs       -
 * output       - NONE
 * side effects - remove ONE mode from a channel
 */
static void
remove_a_mode(struct Channel *chptr, int mask, char flag)
{
  const dlink_node *ptr = NULL;
  char lmodebuf[MODEBUFLEN];
  const char *lpara[4] = { "", "", "", "" };
  char *mbuf = lmodebuf;
  int count = 0;

  *mbuf++ = '-';

  DLINK_FOREACH(ptr, chptr->members.head)
  {
    struct Membership *ms = ptr->data;
    if ((ms->flags & mask) == 0)
      continue;

    ms->flags &= ~mask;

    lpara[count++] = ms->client_p->name;

    *mbuf++ = flag;

    if (count == 4)
    {
      *mbuf = '\0';
      sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
                           me.name, chptr->chname, lmodebuf, lpara[0],
                           lpara[1], lpara[2], lpara[3]);

      mbuf = lmodebuf;
      *mbuf++ = '-';
      count = 0;
      lpara[0] = lpara[1] = lpara[2] = lpara[3] = "";
    }
  }

  if (count != 0)
  {
    *mbuf = '\0';
    sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
                         me.name, chptr->chname, lmodebuf, lpara[0],
                         lpara[1], lpara[2], lpara[3]);
  }
}
Revision:	885
Committed:	Wed Oct 31 18:09:24 2007 UTC (18 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/contrib/m_clearchan.c*
File size:	7516 byte(s)
Log Message:	- Removed LazyLinks in 7.2 to stop people from asking why we keep broken code for half a decade. LL will be implemented in a smarter fashion in due time
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_clearchan.c: Performs a channel takeover
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			#include "tools.h"
27			#include "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "ircd.h"
32			#include "numeric.h"
33			#include "s_log.h"
34			#include "s_serv.h"
35			#include "send.h"
36			#include "irc_string.h"
37			#include "sprintf_irc.h"
38			#include "hash.h"
39			#include "msg.h"
40			#include "parse.h"
41			#include "modules.h"
42			#include "list.h"
43			#include "s_conf.h"
44			#include "common.h"
45
46			static void mo_clearchan(struct Client , struct Client , int, char *[]);
47			static void kick_list(struct Client , struct Channel );
48			static void remove_our_modes(struct Channel *);
49			static void remove_a_mode(struct Channel *, int, char);
50
51			struct Message clearchan_msgtab = {
52			"CLEARCHAN", 0, 0, 2, 0, MFLG_SLOW, 0,
53			{ m_unregistered, m_not_oper, m_ignore, m_ignore, mo_clearchan, m_ignore }
54			};
55
56			#ifndef STATIC_MODULES
57			void
58			_modinit(void)
59			{
60			mod_add_cmd(&clearchan_msgtab);
61			}
62
63			void
64			_moddeinit(void)
65			{
66			mod_del_cmd(&clearchan_msgtab);
67			}
68
69	knight	31	const char *_version = "$Revision$";
70	adx	30	#endif
71
72			/*
73			** mo_clearchan
74			** parv[0] = sender prefix
75			** parv[1] = channel
76			*/
77			static void
78			mo_clearchan(struct Client client_p, struct Client source_p,
79			int parc, char *parv[])
80			{
81			struct Channel *chptr = NULL;
82
83			/* admins only */
84			if (!IsAdmin(source_p))
85			{
86			sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
87			me.name, source_p->name);
88			return;
89			}
90
91			if ((chptr = hash_find_channel(parv[1])) == NULL)
92			{
93			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
94			me.name, source_p->name, parv[1]);
95			return;
96			}
97
98			if (IsMember(source_p, chptr))
99			{
100			sendto_one(source_p, ":%s NOTICE %s :*** Please part %s before using CLEARCHAN",
101			me.name, source_p->name, chptr->chname);
102			return;
103			}
104
105			sendto_wallops_flags(UMODE_WALLOP, &me, "CLEARCHAN called for [%s] by %s!%s@%s",
106			chptr->chname, source_p->name, source_p->username, source_p->host);
107	michael	885	sendto_server(NULL, NULL, NOCAPS, NOCAPS,
108	adx	30	":%s WALLOPS :CLEARCHAN called for [%s] by %s!%s@%s",
109			me.name, chptr->chname, source_p->name, source_p->username,
110			source_p->host);
111			ilog(L_NOTICE, "CLEARCHAN called for [%s] by %s!%s@%s",
112			chptr->chname, source_p->name, source_p->username, source_p->host);
113
114	michael	885	/*
115			* Kill all the modes we have about the channel..
116	adx	30	* making everyone a peon
117			*/
118			remove_our_modes(chptr);
119
120			/* SJOIN the user to give them ops, and lock the channel */
121	michael	885	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
122	adx	30	":%s JOIN %lu %s +ntsi",
123			source_p->id, (unsigned long)(chptr->channelts - 1),
124			chptr->chname);
125	michael	885	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
126			":%s SJOIN %lu %s +ntsi :@%s",
127	adx	30	me.name, (unsigned long)(chptr->channelts - 1),
128			chptr->chname, source_p->name);
129			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN %s",
130			source_p->name, source_p->username,
131			source_p->host, chptr->chname);
132			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +o %s",
133			me.name, chptr->chname, source_p->name);
134
135
136	michael	885	/*
137			* Take the TS down by 1, so we don't see the channel taken over
138			* again.
139			*/
140	adx	30	if (chptr->channelts)
141			--chptr->channelts;
142
143			chptr->mode.mode = MODE_SECRET \| MODE_TOPICLIMIT \|
144			MODE_INVITEONLY \| MODE_NOPRIVMSGS;
145			free_topic(chptr);
146			chptr->mode.key[0] = '\0';
147
148			/* Kick the users out and join the oper */
149			kick_list(source_p, chptr);
150			}
151
152			static void
153			kick_list(struct Client source_p, struct Channel chptr)
154			{
155	michael	616	dlink_node ptr = NULL, ptr_next = NULL;
156			struct Membership *ms = NULL;
157	adx	30
158	michael	616	DLINK_FOREACH(ptr, chptr->members.head)
159	adx	30	{
160	michael	616	ms = ptr->data;
161	adx	30
162	michael	616	sendto_channel_local(ALL_MEMBERS, NO, chptr,
163			":%s!%s@%s KICK %s %s CLEARCHAN",
164			source_p->name, source_p->username,
165			source_p->host, chptr->chname, ms->client_p->name);
166	michael	885	sendto_server(NULL, chptr, NOCAPS, NOCAPS,
167	adx	30	":%s KICK %s %s :CLEARCHAN", source_p->name,
168			chptr->chname, ms->client_p->name);
169			}
170
171	michael	616	add_user_to_channel(chptr, source_p, CHFL_CHANOP, NO);
172
173			DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
174			{
175			ms = ptr->data;
176
177			if (ms->client_p != source_p)
178			remove_user_from_channel(ms);
179			}
180
181	adx	30	/*
182			* Join the user themselves to the channel down here, so they dont see a nicklist
183			* or people being kicked
184			*/
185			sendto_one(source_p, ":%s!%s@%s JOIN %s",
186			source_p->name, source_p->username,
187			source_p->host, chptr->chname);
188			channel_member_names(source_p, chptr, 1);
189			}
190
191			/* remove_our_modes()
192			*
193			* inputs - hide from ops or not int flag
194			* - pointer to channel to remove modes from
195			* - client pointer
196			* output - NONE
197			* side effects - Go through the local members, remove all their
198			* chanop modes etc., this side lost the TS.
199			*/
200			static void
201			remove_our_modes(struct Channel *chptr)
202			{
203			remove_a_mode(chptr, CHFL_CHANOP, 'o');
204			#ifdef HALFOPS
205			remove_a_mode(chptr, CHFL_HALFOP, 'h');
206			#endif
207			remove_a_mode(chptr, CHFL_VOICE, 'v');
208
209			/* Clear all +beI modes */
210			free_channel_list(&chptr->banlist);
211			free_channel_list(&chptr->exceptlist);
212			free_channel_list(&chptr->invexlist);
213			}
214
215			/* remove_a_mode()
216			*
217			* inputs -
218			* output - NONE
219			* side effects - remove ONE mode from a channel
220			*/
221			static void
222			remove_a_mode(struct Channel *chptr, int mask, char flag)
223			{
224			const dlink_node *ptr = NULL;
225			char lmodebuf[MODEBUFLEN];
226			const char *lpara[4] = { "", "", "", "" };
227			char *mbuf = lmodebuf;
228			int count = 0;
229
230			*mbuf++ = '-';
231
232			DLINK_FOREACH(ptr, chptr->members.head)
233			{
234			struct Membership *ms = ptr->data;
235			if ((ms->flags & mask) == 0)
236			continue;
237
238			ms->flags &= ~mask;
239
240			lpara[count++] = ms->client_p->name;
241
242			*mbuf++ = flag;
243
244			if (count == 4)
245			{
246			*mbuf = '\0';
247			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
248			me.name, chptr->chname, lmodebuf, lpara[0],
249			lpara[1], lpara[2], lpara[3]);
250
251			mbuf = lmodebuf;
252			*mbuf++ = '-';
253			count = 0;
254			lpara[0] = lpara[1] = lpara[2] = lpara[3] = "";
255			}
256			}
257
258			if (count != 0)
259			{
260			*mbuf = '\0';
261			sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
262			me.name, chptr->chname, lmodebuf, lpara[0],
263			lpara[1], lpara[2], lpara[3]);
264			}
265			}