ircd-hybrid-7.2/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 (16 years, 5 months ago) by michael
Content type:	text/x-csrc
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
#	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	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	sendto_server(NULL, NULL, NOCAPS, NOCAPS,
108	":%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	/*
115	* Kill all the modes we have about the channel..
116	* making everyone a peon
117	*/
118	remove_our_modes(chptr);
119
120	/* SJOIN the user to give them ops, and lock the channel */
121	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
122	":%s JOIN %lu %s +ntsi",
123	source_p->id, (unsigned long)(chptr->channelts - 1),
124	chptr->chname);
125	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
126	":%s SJOIN %lu %s +ntsi :@%s",
127	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	/*
137	* Take the TS down by 1, so we don't see the channel taken over
138	* again.
139	*/
140	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	dlink_node ptr = NULL, ptr_next = NULL;
156	struct Membership *ms = NULL;
157
158	DLINK_FOREACH(ptr, chptr->members.head)
159	{
160	ms = ptr->data;
161
162	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	sendto_server(NULL, chptr, NOCAPS, NOCAPS,
167	":%s KICK %s %s :CLEARCHAN", source_p->name,
168	chptr->chname, ms->client_p->name);
169	}
170
171	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	/*
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	}