8.0.0beta3/modules/m_knock.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_knock.c: Requests to be invited to a channel.
 *
 *  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 "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_user.h"


/* m_knock
 *    parv[0] = sender prefix
 *    parv[1] = channel
 *
 *  The KNOCK command has the following syntax:
 *   :<sender> KNOCK <channel>
 *
 *  If a user is not banned from the channel they can use the KNOCK
 *  command to have the server NOTICE the channel operators notifying
 *  they would like to join.  Helpful if the channel is invite-only, the
 *  key is forgotten, or the channel is full (INVITE can bypass each one
 *  of these conditions.  Concept by Dianora <db@db.net> and written by
 *  <anonymous>
 */
static void
m_knock(struct Client *client_p, struct Client *source_p,
        int parc, char *parv[])
{
  struct Channel *chptr = NULL;

  if (EmptyString(parv[1]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "KNOCK");
    return;
  }

  if (!ConfigChannel.use_knock && MyClient(source_p))
  {
    sendto_one(source_p, form_str(ERR_KNOCKDISABLED),
               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;
  }

  /* Normal channel, just be sure they aren't on it */
  if (IsMember(source_p, chptr))
  {
    sendto_one(source_p, form_str(ERR_KNOCKONCHAN), me.name,
               source_p->name, chptr->chname);
    return;
  }

  if (!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
        (chptr->mode.limit && dlink_list_length(&chptr->members) >=
         chptr->mode.limit)))
  {
    sendto_one(source_p, form_str(ERR_CHANOPEN), me.name,
               source_p->name, chptr->chname);
    return;
  }

  if (MyClient(source_p))
  {
    /*
     * Don't allow a knock if the user is banned, or the channel is private
     */
    if (PrivateChannel(chptr) || is_banned(chptr, source_p))
    {
      sendto_one(source_p, form_str(ERR_CANNOTSENDTOCHAN),
                 me.name, source_p->name, chptr->chname);
      return;
    }

    /*
     * flood protection:
     * allow one knock per user per knock_delay
     * allow one knock per channel per knock_delay_channel
     *
     * we only limit local requests..
     */
    if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
        CurrentTime)
    {
      sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
                 source_p->name, chptr->chname, "user");
      return;
    }

    if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
    {
      sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
                 source_p->name, chptr->chname, "channel");
      return;
    }

    source_p->localClient->last_knock = CurrentTime;

    sendto_one(source_p, form_str(RPL_KNOCKDLVR), me.name,
               source_p->name, chptr->chname);
  }

  chptr->last_knock = CurrentTime;

  if (ConfigChannel.use_knock)
    sendto_channel_local(CHFL_CHANOP, 0, chptr, form_str(RPL_KNOCK),
                         me.name, chptr->chname, chptr->chname,
                         source_p->name, source_p->username,
                         source_p->host);

  sendto_server(client_p, chptr, CAP_KNOCK|CAP_TS6, NOCAPS,
                ":%s KNOCK %s", ID(source_p), chptr->chname);
  sendto_server(client_p, chptr, CAP_KNOCK, CAP_TS6,
                ":%s KNOCK %s", source_p->name, chptr->chname);
}

static struct Message knock_msgtab = {
  "KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&knock_msgtab);
  add_capability("KNOCK", CAP_KNOCK, 1);
  add_isupport("KNOCK", NULL, -1);
}

static void
module_exit(void)
{
  mod_del_cmd(&knock_msgtab);
  delete_capability("KNOCK");
  delete_isupport("KNOCK");
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1243
Committed:	Fri Sep 30 10:47:53 2011 UTC (14 years, 9 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/m_knock.c*
File size:	5267 byte(s)
Log Message:	- move content of msg.h, ircd_handler.h and handlers.h into parse.h and remove headers accordingly - killed common.h - remove m_killhost.c and m_flags.c from contrib/ - sort out unused header includes here and there
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_knock.c: Requests to be invited to a channel.
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	michael	1011	#include "list.h"
27	adx	30	#include "channel.h"
28			#include "channel_mode.h"
29			#include "client.h"
30			#include "hash.h"
31			#include "irc_string.h"
32			#include "sprintf_irc.h"
33			#include "ircd.h"
34			#include "numeric.h"
35			#include "send.h"
36			#include "s_conf.h"
37			#include "parse.h"
38			#include "modules.h"
39			#include "s_serv.h"
40			#include "s_user.h"
41
42
43			/* m_knock
44			* parv[0] = sender prefix
45			* parv[1] = channel
46			*
47			* The KNOCK command has the following syntax:
48			* :<sender> KNOCK <channel>
49			*
50			* If a user is not banned from the channel they can use the KNOCK
51			* command to have the server NOTICE the channel operators notifying
52			* they would like to join. Helpful if the channel is invite-only, the
53			* key is forgotten, or the channel is full (INVITE can bypass each one
54			* of these conditions. Concept by Dianora <db@db.net> and written by
55			* <anonymous>
56			*/
57			static void
58			m_knock(struct Client client_p, struct Client source_p,
59			int parc, char *parv[])
60			{
61	michael	885	struct Channel *chptr = NULL;
62	adx	30
63	michael	885	if (EmptyString(parv[1]))
64	adx	30	{
65			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
66			me.name, source_p->name, "KNOCK");
67			return;
68			}
69
70	michael	885	if (!ConfigChannel.use_knock && MyClient(source_p))
71	adx	30	{
72	michael	885	sendto_one(source_p, form_str(ERR_KNOCKDISABLED),
73			me.name, source_p->name);
74	adx	30	return;
75			}
76
77	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
78	adx	30	{
79	michael	885	sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
80			me.name, source_p->name, parv[1]);
81	adx	30	return;
82			}
83
84			/* Normal channel, just be sure they aren't on it */
85			if (IsMember(source_p, chptr))
86			{
87	michael	885	sendto_one(source_p, form_str(ERR_KNOCKONCHAN), me.name,
88			source_p->name, chptr->chname);
89	adx	30	return;
90			}
91
92			if (!((chptr->mode.mode & MODE_INVITEONLY) \|\| (*chptr->mode.key) \|\|
93			(chptr->mode.limit && dlink_list_length(&chptr->members) >=
94			chptr->mode.limit)))
95			{
96	michael	885	sendto_one(source_p, form_str(ERR_CHANOPEN), me.name,
97			source_p->name, chptr->chname);
98	adx	30	return;
99			}
100
101	michael	885	if (MyClient(source_p))
102	adx	30	{
103	michael	886	/*
104			* Don't allow a knock if the user is banned, or the channel is private
105			*/
106			if (PrivateChannel(chptr) \|\| is_banned(chptr, source_p))
107	michael	885	{
108			sendto_one(source_p, form_str(ERR_CANNOTSENDTOCHAN),
109			me.name, source_p->name, chptr->chname);
110			return;
111			}
112	adx	30
113	michael	885	/*
114			* flood protection:
115			* allow one knock per user per knock_delay
116			* allow one knock per channel per knock_delay_channel
117			*
118			* we only limit local requests..
119			*/
120			if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
121			CurrentTime)
122			{
123			sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
124			source_p->name, chptr->chname, "user");
125			return;
126			}
127	adx	30
128	michael	885	if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
129			{
130			sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
131			source_p->name, chptr->chname, "channel");
132			return;
133			}
134	adx	30
135	michael	885	source_p->localClient->last_knock = CurrentTime;
136	adx	30
137	michael	885	sendto_one(source_p, form_str(RPL_KNOCKDLVR), me.name,
138			source_p->name, chptr->chname);
139			}
140	adx	30
141			chptr->last_knock = CurrentTime;
142
143	michael	885	if (ConfigChannel.use_knock)
144	michael	1011	sendto_channel_local(CHFL_CHANOP, 0, chptr, form_str(RPL_KNOCK),
145	michael	885	me.name, chptr->chname, chptr->chname,
146			source_p->name, source_p->username,
147			source_p->host);
148	adx	30
149	michael	885	sendto_server(client_p, chptr, CAP_KNOCK\|CAP_TS6, NOCAPS,
150	michael	886	":%s KNOCK %s", ID(source_p), chptr->chname);
151	michael	885	sendto_server(client_p, chptr, CAP_KNOCK, CAP_TS6,
152	michael	886	":%s KNOCK %s", source_p->name, chptr->chname);
153	adx	30	}
154	michael	1230
155			static struct Message knock_msgtab = {
156			"KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
157			{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
158			};
159
160			static void
161			module_init(void)
162			{
163			mod_add_cmd(&knock_msgtab);
164			add_capability("KNOCK", CAP_KNOCK, 1);
165			add_isupport("KNOCK", NULL, -1);
166			}
167
168			static void
169			module_exit(void)
170			{
171			mod_del_cmd(&knock_msgtab);
172			delete_capability("KNOCK");
173			delete_isupport("KNOCK");
174			}
175
176			struct module module_entry = {
177			.node = { NULL, NULL, NULL },
178			.name = NULL,
179			.version = "$Revision$",
180			.handle = NULL,
181			.modinit = module_init,
182			.modexit = module_exit,
183			.flags = 0
184			};