trunk/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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  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 "server.h"
#include "user.h"


/*! \brief KNOCK command handler
 *
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = command
 *      - parv[1] = channel name
 */
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[0] ||
        (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;
    }

    if ((source_p->connection->knock.last_attempt + ConfigChannel.knock_client_time) < CurrentTime)
      source_p->connection->knock.count = 0;

    if (source_p->connection->knock.count > ConfigChannel.knock_client_count)
    {
      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->connection->knock.last_attempt = CurrentTime;
    source_p->connection->knock.count++;

    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", NULL, 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:	4588
Committed:	Tue Aug 26 15:59:07 2014 UTC (11 years ago) by michael
Content type:	text/x-csrc
File size:	4677 byte(s)
Log Message:	- Renamed 'localClient' Client structure member to just 'connection'
#	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	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* 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	michael	3347	#include "server.h"
41			#include "user.h"
42	adx	30
43
44	michael	3344	/*! \brief KNOCK command handler
45	adx	30	*
46	michael	3344	* \param source_p Pointer to allocated Client struct from which the message
47			* originally comes from. This can be a local or remote client.
48			* \param parc Integer holding the number of supplied arguments.
49			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
50			* pointers.
51			* \note Valid arguments for this command are:
52			* - parv[0] = command
53			* - parv[1] = channel name
54	adx	30	*/
55	michael	2820	static int
56	michael	3156	m_knock(struct Client source_p, int parc, char parv[])
57	adx	30	{
58	michael	885	struct Channel *chptr = NULL;
59	adx	30
60	michael	885	if (EmptyString(parv[1]))
61	adx	30	{
62	michael	3109	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "KNOCK");
63	michael	2820	return 0;
64	adx	30	}
65
66	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
67	adx	30	{
68	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
69	michael	2820	return 0;
70	adx	30	}
71
72			/* Normal channel, just be sure they aren't on it */
73			if (IsMember(source_p, chptr))
74			{
75	michael	3109	sendto_one_numeric(source_p, &me, ERR_KNOCKONCHAN, chptr->chname);
76	michael	2820	return 0;
77	adx	30	}
78
79	michael	3481	if (!((chptr->mode.mode & MODE_INVITEONLY) \|\| chptr->mode.key[0] \|\|
80	adx	30	(chptr->mode.limit && dlink_list_length(&chptr->members) >=
81			chptr->mode.limit)))
82			{
83	michael	3109	sendto_one_numeric(source_p, &me, ERR_CHANOPEN, chptr->chname);
84	michael	2820	return 0;
85	adx	30	}
86
87	michael	885	if (MyClient(source_p))
88	adx	30	{
89	michael	886	/*
90			* Don't allow a knock if the user is banned, or the channel is private
91			*/
92			if (PrivateChannel(chptr) \|\| is_banned(chptr, source_p))
93	michael	885	{
94	michael	3109	sendto_one_numeric(source_p, &me, ERR_CANNOTSENDTOCHAN, chptr->chname);
95	michael	2820	return 0;
96	michael	885	}
97	adx	30
98	michael	4588	if ((source_p->connection->knock.last_attempt + ConfigChannel.knock_client_time) < CurrentTime)
99			source_p->connection->knock.count = 0;
100	michael	3860
101	michael	4588	if (source_p->connection->knock.count > ConfigChannel.knock_client_count)
102	michael	885	{
103	michael	3109	sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "user");
104	michael	2820	return 0;
105	michael	885	}
106	adx	30
107	michael	885	if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
108			{
109	michael	3109	sendto_one_numeric(source_p, &me, ERR_TOOMANYKNOCK, chptr->chname, "channel");
110	michael	2820	return 0;
111	michael	885	}
112	adx	30
113	michael	4588	source_p->connection->knock.last_attempt = CurrentTime;
114			source_p->connection->knock.count++;
115	michael	4081
116	michael	3109	sendto_one_numeric(source_p, &me, RPL_KNOCKDLVR, chptr->chname);
117	michael	885	}
118	adx	30
119			chptr->last_knock = CurrentTime;
120
121	michael	1496	sendto_channel_local(CHFL_CHANOP, 0, chptr,
122			":%s NOTICE @%s :KNOCK: %s (%s [%s@%s] has asked for an invite)",
123	michael	1495	me.name, chptr->chname, chptr->chname,
124	michael	1496	source_p->name,
125			source_p->username,
126	michael	1495	source_p->host);
127	adx	30
128	michael	3186	sendto_server(source_p, CAP_KNOCK, NOCAPS, ":%s KNOCK %s",
129			source_p->id, chptr->chname);
130	michael	2820	return 0;
131	adx	30	}
132	michael	1230
133	michael	2820	static struct Message knock_msgtab =
134			{
135	michael	4545	"KNOCK", NULL, 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
136	michael	1230	{ m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
137			};
138
139			static void
140			module_init(void)
141			{
142			mod_add_cmd(&knock_msgtab);
143			add_capability("KNOCK", CAP_KNOCK, 1);
144			add_isupport("KNOCK", NULL, -1);
145			}
146
147			static void
148			module_exit(void)
149			{
150			mod_del_cmd(&knock_msgtab);
151			delete_capability("KNOCK");
152			delete_isupport("KNOCK");
153			}
154
155	michael	2820	struct module module_entry =
156			{
157	michael	1230	.node = { NULL, NULL, NULL },
158			.name = NULL,
159			.version = "$Revision$",
160			.handle = NULL,
161			.modinit = module_init,
162			.modexit = module_exit,
163			.flags = 0
164			};