8.2.x/modules/m_knock.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1998-2014 ircd-hybrid development team
 *
 *  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
 */

/*! \file m_knock.c
 * \brief Includes required functions for processing the KNOCK command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"
#include "s_serv.h"
#include "s_user.h"


/* m_knock
 *    parv[0] = command
 *    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 int
m_knock(struct Client *source_p, int parc, char *parv[])
{
  struct Channel *chptr = NULL;

  if (EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KNOCK");
    return 0;
  }

  if ((chptr = hash_find_channel(parv[1])) == NULL)
  {
    sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
    return 0;
  }

  /* Normal channel, just be sure they aren't on it */
  if (IsMember(source_p, chptr))
  {
    sendto_one_numeric(source_p, &me, ERR_KNOCKONCHAN, chptr->chname);
    return 0;
  }

  if (!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
        (chptr->mode.limit && dlink_list_length(&chptr->members) >=
         chptr->mode.limit)))
  {
    sendto_one_numeric(source_p, &me, ERR_CHANOPEN, chptr->chname);
    return 0;
  }

  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_numeric(source_p, &me, ERR_CANNOTSENDTOCHAN, chptr->chname);
      return 0;
    }

    /*
     * 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_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "user");
      return 0;
    }

    if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
    {
      sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "channel");
      return 0;
    }

    source_p->localClient->last_knock = CurrentTime;
    sendto_one_numeric(source_p, &me, RPL_KNOCKDLVR, chptr->chname);
  }

  chptr->last_knock = CurrentTime;

  sendto_channel_local(CHFL_CHANOP, 0, chptr,
                       ":%s NOTICE @%s :KNOCK: %s (%s [%s@%s] has asked for an invite)",
                       me.name, chptr->chname, chptr->chname,
                       source_p->name,
                       source_p->username,
                       source_p->host);

  sendto_server(source_p, CAP_KNOCK, NOCAPS, ":%s KNOCK %s",
                source_p->id, chptr->chname);
  return 0;
}

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:	3186
Committed:	Thu Mar 20 18:09:34 2014 UTC (11 years, 5 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid/trunk/modules/m_knock.c*
File size:	4721 byte(s)
Log Message:	- Get rid of the ID() macro
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2820	* Copyright (c) 1998-2014 ircd-hybrid development team
5	adx	30	*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	2820	/*! \file m_knock.c
23			* \brief Includes required functions for processing the KNOCK command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "hash.h"
33			#include "irc_string.h"
34			#include "ircd.h"
35			#include "numeric.h"
36			#include "send.h"
37	michael	1309	#include "conf.h"
38	adx	30	#include "parse.h"
39			#include "modules.h"
40			#include "s_serv.h"
41			#include "s_user.h"
42
43
44			/* m_knock
45	michael	3096	* parv[0] = command
46	adx	30	* parv[1] = channel
47			*
48			* The KNOCK command has the following syntax:
49			* :<sender> KNOCK <channel>
50			*
51			* If a user is not banned from the channel they can use the KNOCK
52			* command to have the server NOTICE the channel operators notifying
53			* they would like to join. Helpful if the channel is invite-only, the
54			* key is forgotten, or the channel is full (INVITE can bypass each one
55			* of these conditions. Concept by Dianora <db@db.net> and written by
56			* <anonymous>
57			*/
58	michael	2820	static int
59	michael	3156	m_knock(struct Client source_p, int parc, char parv[])
60	adx	30	{
61	michael	885	struct Channel *chptr = NULL;
62	adx	30
63	michael	885	if (EmptyString(parv[1]))
64	adx	30	{
65	michael	3109	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KNOCK");
66	michael	2820	return 0;
67	adx	30	}
68
69	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
70	adx	30	{
71	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
72	michael	2820	return 0;
73	adx	30	}
74
75			/* Normal channel, just be sure they aren't on it */
76			if (IsMember(source_p, chptr))
77			{
78	michael	3109	sendto_one_numeric(source_p, &me, ERR_KNOCKONCHAN, chptr->chname);
79	michael	2820	return 0;
80	adx	30	}
81
82			if (!((chptr->mode.mode & MODE_INVITEONLY) \|\| (*chptr->mode.key) \|\|
83			(chptr->mode.limit && dlink_list_length(&chptr->members) >=
84			chptr->mode.limit)))
85			{
86	michael	3109	sendto_one_numeric(source_p, &me, ERR_CHANOPEN, chptr->chname);
87	michael	2820	return 0;
88	adx	30	}
89
90	michael	885	if (MyClient(source_p))
91	adx	30	{
92	michael	886	/*
93			* Don't allow a knock if the user is banned, or the channel is private
94			*/
95			if (PrivateChannel(chptr) \|\| is_banned(chptr, source_p))
96	michael	885	{
97	michael	3109	sendto_one_numeric(source_p, &me, ERR_CANNOTSENDTOCHAN, chptr->chname);
98	michael	2820	return 0;
99	michael	885	}
100	adx	30
101	michael	885	/*
102			* flood protection:
103			* allow one knock per user per knock_delay
104			* allow one knock per channel per knock_delay_channel
105			*
106			* we only limit local requests..
107			*/
108			if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
109			CurrentTime)
110			{
111	michael	3109	sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "user");
112	michael	2820	return 0;
113	michael	885	}
114	adx	30
115	michael	885	if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
116			{
117	michael	3109	sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "channel");
118	michael	2820	return 0;
119	michael	885	}
120	adx	30
121	michael	885	source_p->localClient->last_knock = CurrentTime;
122	michael	3109	sendto_one_numeric(source_p, &me, RPL_KNOCKDLVR, chptr->chname);
123	michael	885	}
124	adx	30
125			chptr->last_knock = CurrentTime;
126
127	michael	1496	sendto_channel_local(CHFL_CHANOP, 0, chptr,
128			":%s NOTICE @%s :KNOCK: %s (%s [%s@%s] has asked for an invite)",
129	michael	1495	me.name, chptr->chname, chptr->chname,
130	michael	1496	source_p->name,
131			source_p->username,
132	michael	1495	source_p->host);
133	adx	30
134	michael	3186	sendto_server(source_p, CAP_KNOCK, NOCAPS, ":%s KNOCK %s",
135			source_p->id, chptr->chname);
136	michael	2820	return 0;
137	adx	30	}
138	michael	1230
139	michael	2820	static struct Message knock_msgtab =
140			{
141	michael	1230	"KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
142			{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
143			};
144
145			static void
146			module_init(void)
147			{
148			mod_add_cmd(&knock_msgtab);
149			add_capability("KNOCK", CAP_KNOCK, 1);
150			add_isupport("KNOCK", NULL, -1);
151			}
152
153			static void
154			module_exit(void)
155			{
156			mod_del_cmd(&knock_msgtab);
157			delete_capability("KNOCK");
158			delete_isupport("KNOCK");
159			}
160
161	michael	2820	struct module module_entry =
162			{
163	michael	1230	.node = { NULL, NULL, NULL },
164			.name = NULL,
165			.version = "$Revision$",
166			.handle = NULL,
167			.modinit = module_init,
168			.modexit = module_exit,
169			.flags = 0
170			};