trunk/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 "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] = 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, ERR_NEEDMOREPARAMS,
               me.name, source_p->name, "KNOCK");
    return;
  }

  if ((chptr = hash_find_channel(parv[1])) == NULL)
  {
    sendto_one(source_p, 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, 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, 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, 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, ERR_TOOMANYKNOCK, me.name,
                 source_p->name, chptr->chname, "user");
      return;
    }

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

    source_p->localClient->last_knock = CurrentTime;

    sendto_one(source_p, RPL_KNOCKDLVR, me.name,
               source_p->name, 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(client_p, CAP_KNOCK|CAP_TS6, NOCAPS,
                ":%s KNOCK %s", ID(source_p), chptr->chname);
  sendto_server(client_p, 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:	1832
Committed:	Fri Apr 19 19:16:09 2013 UTC (12 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	5028 byte(s)
Log Message:	- Made all numeric defines use the actual string instead of the numeric value which allows to use gcc's printf format attribute - Remove current message locale implementation
#	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 "ircd.h"
33			#include "numeric.h"
34			#include "send.h"
35	michael	1309	#include "conf.h"
36	adx	30	#include "parse.h"
37			#include "modules.h"
38			#include "s_serv.h"
39			#include "s_user.h"
40
41
42			/* m_knock
43			* parv[0] = sender prefix
44			* parv[1] = channel
45			*
46			* The KNOCK command has the following syntax:
47			* :<sender> KNOCK <channel>
48			*
49			* If a user is not banned from the channel they can use the KNOCK
50			* command to have the server NOTICE the channel operators notifying
51			* they would like to join. Helpful if the channel is invite-only, the
52			* key is forgotten, or the channel is full (INVITE can bypass each one
53			* of these conditions. Concept by Dianora <db@db.net> and written by
54			* <anonymous>
55			*/
56			static void
57			m_knock(struct Client client_p, struct Client source_p,
58			int parc, char *parv[])
59			{
60	michael	885	struct Channel *chptr = NULL;
61	adx	30
62	michael	885	if (EmptyString(parv[1]))
63	adx	30	{
64	michael	1832	sendto_one(source_p, ERR_NEEDMOREPARAMS,
65	adx	30	me.name, source_p->name, "KNOCK");
66			return;
67			}
68
69	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
70	adx	30	{
71	michael	1832	sendto_one(source_p, ERR_NOSUCHCHANNEL,
72	michael	885	me.name, source_p->name, parv[1]);
73	adx	30	return;
74			}
75
76			/* Normal channel, just be sure they aren't on it */
77			if (IsMember(source_p, chptr))
78			{
79	michael	1832	sendto_one(source_p, ERR_KNOCKONCHAN, me.name,
80	michael	885	source_p->name, chptr->chname);
81	adx	30	return;
82			}
83
84			if (!((chptr->mode.mode & MODE_INVITEONLY) \|\| (*chptr->mode.key) \|\|
85			(chptr->mode.limit && dlink_list_length(&chptr->members) >=
86			chptr->mode.limit)))
87			{
88	michael	1832	sendto_one(source_p, ERR_CHANOPEN, me.name,
89	michael	885	source_p->name, chptr->chname);
90	adx	30	return;
91			}
92
93	michael	885	if (MyClient(source_p))
94	adx	30	{
95	michael	886	/*
96			* Don't allow a knock if the user is banned, or the channel is private
97			*/
98			if (PrivateChannel(chptr) \|\| is_banned(chptr, source_p))
99	michael	885	{
100	michael	1832	sendto_one(source_p, ERR_CANNOTSENDTOCHAN,
101	michael	885	me.name, source_p->name, chptr->chname);
102			return;
103			}
104	adx	30
105	michael	885	/*
106			* flood protection:
107			* allow one knock per user per knock_delay
108			* allow one knock per channel per knock_delay_channel
109			*
110			* we only limit local requests..
111			*/
112			if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
113			CurrentTime)
114			{
115	michael	1832	sendto_one(source_p, ERR_TOOMANYKNOCK, me.name,
116	michael	885	source_p->name, chptr->chname, "user");
117			return;
118			}
119	adx	30
120	michael	885	if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
121			{
122	michael	1832	sendto_one(source_p, ERR_TOOMANYKNOCK, me.name,
123	michael	885	source_p->name, chptr->chname, "channel");
124			return;
125			}
126	adx	30
127	michael	885	source_p->localClient->last_knock = CurrentTime;
128	adx	30
129	michael	1832	sendto_one(source_p, RPL_KNOCKDLVR, me.name,
130	michael	885	source_p->name, chptr->chname);
131			}
132	adx	30
133			chptr->last_knock = CurrentTime;
134
135	michael	1496	sendto_channel_local(CHFL_CHANOP, 0, chptr,
136			":%s NOTICE @%s :KNOCK: %s (%s [%s@%s] has asked for an invite)",
137	michael	1495	me.name, chptr->chname, chptr->chname,
138	michael	1496	source_p->name,
139			source_p->username,
140	michael	1495	source_p->host);
141	adx	30
142	michael	1474	sendto_server(client_p, CAP_KNOCK\|CAP_TS6, NOCAPS,
143	michael	886	":%s KNOCK %s", ID(source_p), chptr->chname);
144	michael	1474	sendto_server(client_p, CAP_KNOCK, CAP_TS6,
145	michael	886	":%s KNOCK %s", source_p->name, chptr->chname);
146	adx	30	}
147	michael	1230
148			static struct Message knock_msgtab = {
149			"KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
150			{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
151			};
152
153			static void
154			module_init(void)
155			{
156			mod_add_cmd(&knock_msgtab);
157			add_capability("KNOCK", CAP_KNOCK, 1);
158			add_isupport("KNOCK", NULL, -1);
159			}
160
161			static void
162			module_exit(void)
163			{
164			mod_del_cmd(&knock_msgtab);
165			delete_capability("KNOCK");
166			delete_isupport("KNOCK");
167			}
168
169			struct module module_entry = {
170			.node = { NULL, NULL, NULL },
171			.name = NULL,
172			.version = "$Revision$",
173			.handle = NULL,
174			.modinit = module_init,
175			.modexit = module_exit,
176			.flags = 0
177			};