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: m_clearchan.c,v 1.58 2005/09/11 15:59:35 michael Exp $
 */

#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: 1.58 $";
#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:	30
Committed:	Sun Oct 2 20:03:27 2005 UTC (18 years, 6 months ago) by adx
Content type:	text/x-csrc
File size:	7779 byte(s)
Log Message:	- imported sources - can be moved later according to the directory/branching scheme, but we need the svn up
#	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			* $Id: m_clearchan.c,v 1.58 2005/09/11 15:59:35 michael Exp $
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: 1.58 $";
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			}