ircd-hybrid/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;
  }

  /* XXX - we might not have CBURSTed this channel if we are a lazylink
   * yet. */
  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, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
                ":%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, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
                ":%s JOIN %lu %s +ntsi",
                source_p->id, (unsigned long)(chptr->channelts - 1),
                chptr->chname);
  sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6,
                LL_ICLIENT, ":%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 *m = NULL, *next_m = NULL;

  add_user_to_channel(chptr, source_p, CHFL_CHANOP, NO);

  DLINK_FOREACH_SAFE(m, next_m, chptr->members.head)
  {
    struct Membership *ms = m->data;

    if (ms->client_p == source_p)
      continue;

    /* can reuse m here */
    DLINK_FOREACH(m, chptr->locmembers.head)
    {
      if (((struct Membership *)m->data)->client_p == source_p)
        continue;
      sendto_one(m->data, ":%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, source_p, chptr, NOCAPS, NOCAPS, LL_ICLIENT,
                  ":%s KICK %s %s :CLEARCHAN", source_p->name,
                  chptr->chname, ms->client_p->name);
    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:	31
Committed:	Sun Oct 2 20:34:05 2005 UTC (18 years, 6 months ago) by knight
Content type:	text/x-csrc
File size:	7717 byte(s)
Log Message:	- Fix svn:keywords
#	Content
1	/*
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	* $Id$
23	*/
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	const char *_version = "$Revision$";
70	#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	/* XXX - we might not have CBURSTed this channel if we are a lazylink
92	* yet. */
93	if ((chptr = hash_find_channel(parv[1])) == NULL)
94	{
95	sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
96	me.name, source_p->name, parv[1]);
97	return;
98	}
99
100	if (IsMember(source_p, chptr))
101	{
102	sendto_one(source_p, ":%s NOTICE %s :*** Please part %s before using CLEARCHAN",
103	me.name, source_p->name, chptr->chname);
104	return;
105	}
106
107	sendto_wallops_flags(UMODE_WALLOP, &me, "CLEARCHAN called for [%s] by %s!%s@%s",
108	chptr->chname, source_p->name, source_p->username, source_p->host);
109	sendto_server(NULL, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
110	":%s WALLOPS :CLEARCHAN called for [%s] by %s!%s@%s",
111	me.name, chptr->chname, source_p->name, source_p->username,
112	source_p->host);
113	ilog(L_NOTICE, "CLEARCHAN called for [%s] by %s!%s@%s",
114	chptr->chname, source_p->name, source_p->username, source_p->host);
115
116	/* Kill all the modes we have about the channel..
117	* making everyone a peon
118	*/
119	remove_our_modes(chptr);
120
121	/* SJOIN the user to give them ops, and lock the channel */
122	sendto_server(client_p, source_p, chptr, CAP_TS6, NOCAPS, LL_ICLIENT,
123	":%s JOIN %lu %s +ntsi",
124	source_p->id, (unsigned long)(chptr->channelts - 1),
125	chptr->chname);
126	sendto_server(client_p, source_p, chptr, NOCAPS, CAP_TS6,
127	LL_ICLIENT, ":%s SJOIN %lu %s +ntsi :@%s",
128	me.name, (unsigned long)(chptr->channelts - 1),
129	chptr->chname, source_p->name);
130	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s!%s@%s JOIN %s",
131	source_p->name, source_p->username,
132	source_p->host, chptr->chname);
133	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s +o %s",
134	me.name, chptr->chname, source_p->name);
135
136
137	/* Take the TS down by 1, so we don't see the channel taken over
138	* again. */
139	if (chptr->channelts)
140	--chptr->channelts;
141
142	chptr->mode.mode = MODE_SECRET \| MODE_TOPICLIMIT \|
143	MODE_INVITEONLY \| MODE_NOPRIVMSGS;
144	free_topic(chptr);
145	chptr->mode.key[0] = '\0';
146
147	/* Kick the users out and join the oper */
148	kick_list(source_p, chptr);
149	}
150
151	static void
152	kick_list(struct Client source_p, struct Channel chptr)
153	{
154	dlink_node m = NULL, next_m = NULL;
155
156	add_user_to_channel(chptr, source_p, CHFL_CHANOP, NO);
157
158	DLINK_FOREACH_SAFE(m, next_m, chptr->members.head)
159	{
160	struct Membership *ms = m->data;
161
162	if (ms->client_p == source_p)
163	continue;
164
165	/* can reuse m here */
166	DLINK_FOREACH(m, chptr->locmembers.head)
167	{
168	if (((struct Membership *)m->data)->client_p == source_p)
169	continue;
170	sendto_one(m->data, ":%s!%s@%s KICK %s %s :CLEARCHAN",
171	source_p->name, source_p->username,
172	source_p->host,
173	chptr->chname, ms->client_p->name);
174	}
175
176	sendto_server(NULL, source_p, chptr, NOCAPS, NOCAPS, LL_ICLIENT,
177	":%s KICK %s %s :CLEARCHAN", source_p->name,
178	chptr->chname, ms->client_p->name);
179	remove_user_from_channel(ms);
180	}
181
182	/*
183	* Join the user themselves to the channel down here, so they dont see a nicklist
184	* or people being kicked
185	*/
186	sendto_one(source_p, ":%s!%s@%s JOIN %s",
187	source_p->name, source_p->username,
188	source_p->host, chptr->chname);
189	channel_member_names(source_p, chptr, 1);
190	}
191
192	/* remove_our_modes()
193	*
194	* inputs - hide from ops or not int flag
195	* - pointer to channel to remove modes from
196	* - client pointer
197	* output - NONE
198	* side effects - Go through the local members, remove all their
199	* chanop modes etc., this side lost the TS.
200	*/
201	static void
202	remove_our_modes(struct Channel *chptr)
203	{
204	remove_a_mode(chptr, CHFL_CHANOP, 'o');
205	#ifdef HALFOPS
206	remove_a_mode(chptr, CHFL_HALFOP, 'h');
207	#endif
208	remove_a_mode(chptr, CHFL_VOICE, 'v');
209
210	/* Clear all +beI modes */
211	free_channel_list(&chptr->banlist);
212	free_channel_list(&chptr->exceptlist);
213	free_channel_list(&chptr->invexlist);
214	}
215
216	/* remove_a_mode()
217	*
218	* inputs -
219	* output - NONE
220	* side effects - remove ONE mode from a channel
221	*/
222	static void
223	remove_a_mode(struct Channel *chptr, int mask, char flag)
224	{
225	const dlink_node *ptr = NULL;
226	char lmodebuf[MODEBUFLEN];
227	const char *lpara[4] = { "", "", "", "" };
228	char *mbuf = lmodebuf;
229	int count = 0;
230
231	*mbuf++ = '-';
232
233	DLINK_FOREACH(ptr, chptr->members.head)
234	{
235	struct Membership *ms = ptr->data;
236	if ((ms->flags & mask) == 0)
237	continue;
238
239	ms->flags &= ~mask;
240
241	lpara[count++] = ms->client_p->name;
242
243	*mbuf++ = flag;
244
245	if (count == 4)
246	{
247	*mbuf = '\0';
248	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
249	me.name, chptr->chname, lmodebuf, lpara[0],
250	lpara[1], lpara[2], lpara[3]);
251
252	mbuf = lmodebuf;
253	*mbuf++ = '-';
254	count = 0;
255	lpara[0] = lpara[1] = lpara[2] = lpara[3] = "";
256	}
257	}
258
259	if (count != 0)
260	{
261	*mbuf = '\0';
262	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s MODE %s %s %s %s %s %s",
263	me.name, chptr->chname, lmodebuf, lpara[0],
264	lpara[1], lpara[2], lpara[3]);
265	}
266	}