ircd-hybrid-8/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 "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "log.h"
#include "s_serv.h"
#include "send.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "hash.h"
#include "parse.h"
#include "modules.h"
#include "conf.h"


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


/*
** 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 (!HasUMode(source_p, UMODE_ADMIN))
  {
    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(LOG_TYPE_IRCD, "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, 0, chptr, ":%s!%s@%s JOIN %s",
                       source_p->name, source_p->username,
                       source_p->host, chptr->chname);
  sendto_channel_local(ALL_MEMBERS, 0, 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;

  set_channel_topic(chptr, "", "", 0);
  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, 0, 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, 0);

  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, 0, 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, 0, chptr, ":%s MODE %s %s %s %s %s %s",
                         me.name, chptr->chname, lmodebuf, lpara[0],
                         lpara[1], lpara[2], lpara[3]);
  }
}

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

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

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

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1309
Committed:	Sun Mar 25 11:24:18 2012 UTC (12 years ago) by michael
Content type:	text/x-csrc
File size:	7558 byte(s)
Log Message:	- renaming files: ircd_parser.y -> conf_parser.y ircd_lexer.l -> conf_lexer.l s_conf.c -> conf.c s_conf.h -> conf.h s_log.c -> log.c s_log.h -> log.h
#	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 "list.h"
27	#include "channel.h"
28	#include "channel_mode.h"
29	#include "client.h"
30	#include "ircd.h"
31	#include "numeric.h"
32	#include "log.h"
33	#include "s_serv.h"
34	#include "send.h"
35	#include "irc_string.h"
36	#include "sprintf_irc.h"
37	#include "hash.h"
38	#include "parse.h"
39	#include "modules.h"
40	#include "conf.h"
41
42
43	static void kick_list(struct Client , struct Channel );
44	static void remove_our_modes(struct Channel *);
45	static void remove_a_mode(struct Channel *, int, char);
46
47
48	/*
49	** mo_clearchan
50	** parv[0] = sender prefix
51	** parv[1] = channel
52	*/
53	static void
54	mo_clearchan(struct Client client_p, struct Client source_p,
55	int parc, char *parv[])
56	{
57	struct Channel *chptr = NULL;
58
59	/* admins only */
60	if (!HasUMode(source_p, UMODE_ADMIN))
61	{
62	sendto_one(source_p, form_str(ERR_NOPRIVILEGES),
63	me.name, source_p->name);
64	return;
65	}
66
67	if ((chptr = hash_find_channel(parv[1])) == NULL)
68	{
69	sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
70	me.name, source_p->name, parv[1]);
71	return;
72	}
73
74	if (IsMember(source_p, chptr))
75	{
76	sendto_one(source_p, ":%s NOTICE %s :*** Please part %s before using CLEARCHAN",
77	me.name, source_p->name, chptr->chname);
78	return;
79	}
80
81	sendto_wallops_flags(UMODE_WALLOP, &me, "CLEARCHAN called for [%s] by %s!%s@%s",
82	chptr->chname, source_p->name, source_p->username, source_p->host);
83	sendto_server(NULL, NULL, NOCAPS, NOCAPS,
84	":%s WALLOPS :CLEARCHAN called for [%s] by %s!%s@%s",
85	me.name, chptr->chname, source_p->name, source_p->username,
86	source_p->host);
87	ilog(LOG_TYPE_IRCD, "CLEARCHAN called for [%s] by %s!%s@%s",
88	chptr->chname, source_p->name, source_p->username, source_p->host);
89
90	/*
91	* Kill all the modes we have about the channel..
92	* making everyone a peon
93	*/
94	remove_our_modes(chptr);
95
96	/* SJOIN the user to give them ops, and lock the channel */
97	sendto_server(client_p, chptr, CAP_TS6, NOCAPS,
98	":%s JOIN %lu %s +ntsi",
99	source_p->id, (unsigned long)(chptr->channelts - 1),
100	chptr->chname);
101	sendto_server(client_p, chptr, NOCAPS, CAP_TS6,
102	":%s SJOIN %lu %s +ntsi :@%s",
103	me.name, (unsigned long)(chptr->channelts - 1),
104	chptr->chname, source_p->name);
105	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s!%s@%s JOIN %s",
106	source_p->name, source_p->username,
107	source_p->host, chptr->chname);
108	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s +o %s",
109	me.name, chptr->chname, source_p->name);
110
111
112	/*
113	* Take the TS down by 1, so we don't see the channel taken over
114	* again.
115	*/
116	if (chptr->channelts)
117	--chptr->channelts;
118
119	chptr->mode.mode = MODE_SECRET \| MODE_TOPICLIMIT \|
120	MODE_INVITEONLY \| MODE_NOPRIVMSGS;
121
122	set_channel_topic(chptr, "", "", 0);
123	chptr->mode.key[0] = '\0';
124
125	/* Kick the users out and join the oper */
126	kick_list(source_p, chptr);
127	}
128
129	static void
130	kick_list(struct Client source_p, struct Channel chptr)
131	{
132	dlink_node ptr = NULL, ptr_next = NULL;
133	struct Membership *ms = NULL;
134
135	DLINK_FOREACH(ptr, chptr->members.head)
136	{
137	ms = ptr->data;
138
139	sendto_channel_local(ALL_MEMBERS, 0, chptr,
140	":%s!%s@%s KICK %s %s CLEARCHAN",
141	source_p->name, source_p->username,
142	source_p->host, chptr->chname, ms->client_p->name);
143	sendto_server(NULL, chptr, NOCAPS, NOCAPS,
144	":%s KICK %s %s :CLEARCHAN", source_p->name,
145	chptr->chname, ms->client_p->name);
146	}
147
148	add_user_to_channel(chptr, source_p, CHFL_CHANOP, 0);
149
150	DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
151	{
152	ms = ptr->data;
153
154	if (ms->client_p != source_p)
155	remove_user_from_channel(ms);
156	}
157
158	/*
159	* Join the user themselves to the channel down here, so they dont see a nicklist
160	* or people being kicked
161	*/
162	sendto_one(source_p, ":%s!%s@%s JOIN %s",
163	source_p->name, source_p->username,
164	source_p->host, chptr->chname);
165	channel_member_names(source_p, chptr, 1);
166	}
167
168	/* remove_our_modes()
169	*
170	* inputs - hide from ops or not int flag
171	* - pointer to channel to remove modes from
172	* - client pointer
173	* output - NONE
174	* side effects - Go through the local members, remove all their
175	* chanop modes etc., this side lost the TS.
176	*/
177	static void
178	remove_our_modes(struct Channel *chptr)
179	{
180	remove_a_mode(chptr, CHFL_CHANOP, 'o');
181	#ifdef HALFOPS
182	remove_a_mode(chptr, CHFL_HALFOP, 'h');
183	#endif
184	remove_a_mode(chptr, CHFL_VOICE, 'v');
185
186	/* Clear all +beI modes */
187	free_channel_list(&chptr->banlist);
188	free_channel_list(&chptr->exceptlist);
189	free_channel_list(&chptr->invexlist);
190	}
191
192	/* remove_a_mode()
193	*
194	* inputs -
195	* output - NONE
196	* side effects - remove ONE mode from a channel
197	*/
198	static void
199	remove_a_mode(struct Channel *chptr, int mask, char flag)
200	{
201	const dlink_node *ptr = NULL;
202	char lmodebuf[MODEBUFLEN];
203	const char *lpara[4] = { "", "", "", "" };
204	char *mbuf = lmodebuf;
205	int count = 0;
206
207	*mbuf++ = '-';
208
209	DLINK_FOREACH(ptr, chptr->members.head)
210	{
211	struct Membership *ms = ptr->data;
212	if ((ms->flags & mask) == 0)
213	continue;
214
215	ms->flags &= ~mask;
216
217	lpara[count++] = ms->client_p->name;
218
219	*mbuf++ = flag;
220
221	if (count == 4)
222	{
223	*mbuf = '\0';
224	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s %s %s %s",
225	me.name, chptr->chname, lmodebuf, lpara[0],
226	lpara[1], lpara[2], lpara[3]);
227
228	mbuf = lmodebuf;
229	*mbuf++ = '-';
230	count = 0;
231	lpara[0] = lpara[1] = lpara[2] = lpara[3] = "";
232	}
233	}
234
235	if (count != 0)
236	{
237	*mbuf = '\0';
238	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s MODE %s %s %s %s %s %s",
239	me.name, chptr->chname, lmodebuf, lpara[0],
240	lpara[1], lpara[2], lpara[3]);
241	}
242	}
243
244	static struct Message clearchan_msgtab = {
245	"CLEARCHAN", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
246	{ m_unregistered, m_not_oper, m_ignore, m_ignore, mo_clearchan, m_ignore }
247	};
248
249	static void
250	module_init(void)
251	{
252	mod_add_cmd(&clearchan_msgtab);
253	}
254
255	static void
256	module_exit(void)
257	{
258	mod_del_cmd(&clearchan_msgtab);
259	}
260
261	struct module module_entry = {
262	.node = { NULL, NULL, NULL },
263	.name = NULL,
264	.version = "$Revision$",
265	.handle = NULL,
266	.modinit = module_init,
267	.modexit = module_exit,
268	.flags = 0
269	};