trunk/modules/m_kline.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2015 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_kline.c
 * \brief Includes required functions for processing the KLINE command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "client.h"
#include "irc_string.h"
#include "ircd.h"
#include "conf.h"
#include "hostmask.h"
#include "numeric.h"
#include "log.h"
#include "misc.h"
#include "send.h"
#include "server.h"
#include "parse.h"
#include "modules.h"
#include "conf_db.h"
#include "memory.h"


static void
check_kline(struct AddressRec *arec)
{
  dlink_node *node = NULL, *node_next = NULL;

  DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
  {
    struct Client *client_p = node->data;

    if (IsDead(client_p))
      continue;

    if (match(arec->username, client_p->username))
      continue;

    switch (arec->masktype)
    {
      case HM_IPV4:
        if (client_p->connection->aftype == AF_INET)
          if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
            conf_try_ban(client_p, arec->conf);
        break;
      case HM_IPV6:
        if (client_p->connection->aftype == AF_INET6)
          if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
            conf_try_ban(client_p, arec->conf);
        break;
      default:  /* HM_HOST */
        if (!match(arec->Mask.hostname, client_p->host) || !match(arec->Mask.hostname, client_p->sockhost))
          conf_try_ban(client_p, arec->conf);
        break;
    }
  }
}

/* apply_tkline()
 *
 * inputs       -
 * output       - NONE
 * side effects - tkline as given is placed
 */
static void
m_kline_add_kline(struct Client *source_p, struct MaskItem *conf,
                  time_t tkline_time)
{
  if (tkline_time)
  {
    conf->until = CurrentTime + tkline_time;

    if (IsClient(source_p))
      sendto_one_notice(source_p, &me, ":Added temporary %d min. K-Line [%s@%s]",
                        tkline_time/60, conf->user, conf->host);

    sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                         "%s added temporary %d min. K-Line for [%s@%s] [%s]",
                         get_oper_name(source_p), tkline_time/60,
                         conf->user, conf->host,
                         conf->reason);
    ilog(LOG_TYPE_KLINE, "%s added temporary %d min. K-Line for [%s@%s] [%s]",
         get_oper_name(source_p), tkline_time/60,
         conf->user, conf->host, conf->reason);
  }
  else
  {
    if (IsClient(source_p))
      sendto_one_notice(source_p, &me, ":Added K-Line [%s@%s]",
                        conf->user, conf->host);

    sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
                         "%s added K-Line for [%s@%s] [%s]",
                         get_oper_name(source_p),
                         conf->user, conf->host, conf->reason);
    ilog(LOG_TYPE_KLINE, "%s added K-Line for [%s@%s] [%s]",
         get_oper_name(source_p), conf->user, conf->host, conf->reason);
  }

  conf->setat = CurrentTime;
  SetConfDatabase(conf);

  check_kline(add_conf_by_address(CONF_KLINE, conf));
}

/* already_placed_kline()
 * inputs       - user to complain to, username & host to check for
 * outputs      - returns 1 on existing K-line, 0 if doesn't exist
 * side effects - notifies source_p if the K-line already exists
 */
/*
 * Note: This currently works if the new K-line is a special case of an
 *       existing K-line, but not the other way round. To do that we would
 *       have to walk the hash and check every existing K-line. -A1kmm.
 */
static int
already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int warn)
{
  struct irc_ssaddr iphost, *piphost;
  struct MaskItem *conf = NULL;
  int t = 0;
  int aftype = 0;

  if ((t = parse_netmask(lhost, &iphost, NULL)) != HM_HOST)
  {
    if (t == HM_IPV6)
      aftype = AF_INET6;
    else
      aftype = AF_INET;
    piphost = &iphost;
  }
  else
    piphost = NULL;

  if ((conf = find_conf_by_address(lhost, piphost, CONF_KLINE, aftype, luser, NULL, 0)))
  {
    if (IsClient(source_p) && warn)
      sendto_one_notice(source_p, &me, ":[%s@%s] already K-Lined by [%s@%s] - %s",
                        luser, lhost, conf->user, conf->host, conf->reason);
    return 1;
  }

  return 0;
}

/* mo_kline()
 *
 * inputs       - pointer to server
 *              - pointer to client
 *              - parameter count
 *              - parameter list
 * output       -
 * side effects - k line is added
 */
static int
mo_kline(struct Client *source_p, int parc, char *parv[])
{
  char buffer[IRCD_BUFSIZE];
  char *reason = NULL;
  char *user = NULL;
  char *host = NULL;
  char *target_server = NULL;
  struct MaskItem *conf;
  time_t tkline_time = 0;

  if (!HasOFlag(source_p, OPER_FLAG_KLINE))
  {
    sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "kline");
    return 0;
  }

  if (!parse_aline("KLINE", source_p, parc, parv, AWILD, &user, &host,
                   &tkline_time, &target_server, &reason))
    return 0;

  if (target_server)
  {
    sendto_match_servs(source_p, target_server, CAP_KLN, "KLINE %s %lu %s %s :%s",
                       target_server, (unsigned long)tkline_time,
                       user, host, reason);

    /* Allow ON to apply local kline as well if it matches */
    if (match(target_server, me.name))
      return 0;
  }
  else
    cluster_a_line(source_p, "KLINE", CAP_KLN, SHARED_KLINE,
                   "%d %s %s :%s", tkline_time, user, host, reason);

  if (already_placed_kline(source_p, user, host, 1))
    return 0;

  conf = conf_make(CONF_KLINE);
  conf->host = xstrdup(host);
  conf->user = xstrdup(user);

  if (tkline_time)
    snprintf(buffer, sizeof(buffer), "Temporary K-line %d min. - %.*s (%s)",
             (int)(tkline_time/60), REASONLEN, reason, smalldate(0));
  else
    snprintf(buffer, sizeof(buffer), "%.*s (%s)", REASONLEN, reason, smalldate(0));

  conf->reason = xstrdup(buffer);
  m_kline_add_kline(source_p, conf, tkline_time);
  return 0;
}

/* me_kline - handle remote kline. no propagation */
static int
ms_kline(struct Client *source_p, int parc, char *parv[])
{
  char buffer[IRCD_BUFSIZE];
  struct MaskItem *conf = NULL;
  time_t tkline_time = 0;
  char *kuser, *khost, *kreason;

  if (parc != 6 || EmptyString(parv[5]))
    return 0;

  /* parv[0]  parv[1]        parv[2]      parv[3]  parv[4]  parv[5] */
  /* command  target_server  tkline_time  user     host     reason */
  sendto_match_servs(source_p, parv[1], CAP_KLN, "KLINE %s %s %s %s :%s",
                     parv[1], parv[2], parv[3], parv[4], parv[5]);

  if (match(parv[1], me.name))
    return 0;

  tkline_time = valid_tkline(parv[2], TK_SECONDS);
  kuser = parv[3];
  khost = parv[4];
  kreason = parv[5];

  if (HasFlag(source_p, FLAGS_SERVICE) ||
      find_matching_name_conf(CONF_ULINE, source_p->servptr->name,
                              source_p->username, source_p->host,
                              SHARED_KLINE))
  {
    if (!valid_wild_card(source_p, 2, kuser, khost))
      return 0;

    if (already_placed_kline(source_p, kuser, khost, 1))
      return 0;

    conf = conf_make(CONF_KLINE);
    conf->host = xstrdup(khost);
    conf->user = xstrdup(kuser);

    if (tkline_time)
      snprintf(buffer, sizeof(buffer), "Temporary K-line %u min. - %.*s (%s)",
               (unsigned int)(tkline_time/60), REASONLEN, kreason, smalldate(0));
    else
      snprintf(buffer, sizeof(buffer), "%.*s (%s)", REASONLEN, kreason, smalldate(0));

    conf->reason = xstrdup(buffer);
    m_kline_add_kline(source_p, conf, tkline_time);
  }

  return 0;
}

static struct Message kline_msgtab =
{
  "KLINE", NULL, 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, ms_kline, m_ignore, mo_kline, m_ignore }
};

static void
module_init(void)
{
  mod_add_cmd(&kline_msgtab);
  add_capability("KLN", CAP_KLN);
}

static void
module_exit(void)
{
  mod_del_cmd(&kline_msgtab);
  delete_capability("KLN");
}

struct module module_entry =
{
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	5796
Committed:	Fri Apr 17 16:12:30 2015 UTC (10 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	8939 byte(s)
Log Message:	- Minor cleanups to CAPAB related code
#	User	Rev	Content
1	adx	30	/*
2	michael	2810	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	5347	* Copyright (c) 1997-2015 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	2810	/*! \file m_kline.c
23	michael	3350	* \brief Includes required functions for processing the KLINE command.
24	michael	2810	* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "client.h"
30			#include "irc_string.h"
31			#include "ircd.h"
32	michael	1632	#include "conf.h"
33	adx	30	#include "hostmask.h"
34			#include "numeric.h"
35	michael	1309	#include "log.h"
36	michael	3347	#include "misc.h"
37	adx	30	#include "send.h"
38	michael	3347	#include "server.h"
39	adx	30	#include "parse.h"
40			#include "modules.h"
41	michael	1622	#include "conf_db.h"
42	michael	1666	#include "memory.h"
43	adx	30
44	michael	1058
45	michael	2811	static void
46			check_kline(struct AddressRec *arec)
47			{
48	michael	4815	dlink_node node = NULL, node_next = NULL;
49	michael	2811
50	michael	4815	DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
51	michael	2811	{
52	michael	4815	struct Client *client_p = node->data;
53	michael	2811
54	michael	2812	if (IsDead(client_p))
55	michael	2811	continue;
56
57			if (match(arec->username, client_p->username))
58			continue;
59
60			switch (arec->masktype)
61			{
62			case HM_IPV4:
63	michael	4588	if (client_p->connection->aftype == AF_INET)
64			if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
65	michael	2813	conf_try_ban(client_p, arec->conf);
66	michael	2811	break;
67			case HM_IPV6:
68	michael	4588	if (client_p->connection->aftype == AF_INET6)
69			if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
70	michael	2813	conf_try_ban(client_p, arec->conf);
71	michael	2811	break;
72			default: /* HM_HOST */
73	michael	5387	if (!match(arec->Mask.hostname, client_p->host) \|\| !match(arec->Mask.hostname, client_p->sockhost))
74	michael	2813	conf_try_ban(client_p, arec->conf);
75	michael	2811	break;
76			}
77			}
78			}
79
80	michael	2810	/* apply_tkline()
81			*
82			* inputs -
83			* output - NONE
84			* side effects - tkline as given is placed
85			*/
86			static void
87			m_kline_add_kline(struct Client source_p, struct MaskItem conf,
88			time_t tkline_time)
89			{
90			if (tkline_time)
91			{
92			conf->until = CurrentTime + tkline_time;
93	michael	4635
94			if (IsClient(source_p))
95			sendto_one_notice(source_p, &me, ":Added temporary %d min. K-Line [%s@%s]",
96			tkline_time/60, conf->user, conf->host);
97	michael	4890
98	michael	2810	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
99			"%s added temporary %d min. K-Line for [%s@%s] [%s]",
100			get_oper_name(source_p), tkline_time/60,
101			conf->user, conf->host,
102			conf->reason);
103			ilog(LOG_TYPE_KLINE, "%s added temporary %d min. K-Line for [%s@%s] [%s]",
104			get_oper_name(source_p), tkline_time/60,
105			conf->user, conf->host, conf->reason);
106			}
107			else
108			{
109	michael	4635	if (IsClient(source_p))
110			sendto_one_notice(source_p, &me, ":Added K-Line [%s@%s]",
111			conf->user, conf->host);
112	michael	4890
113	michael	2810	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_NOTICE,
114			"%s added K-Line for [%s@%s] [%s]",
115			get_oper_name(source_p),
116			conf->user, conf->host, conf->reason);
117			ilog(LOG_TYPE_KLINE, "%s added K-Line for [%s@%s] [%s]",
118			get_oper_name(source_p), conf->user, conf->host, conf->reason);
119			}
120	adx	30
121	michael	2810	conf->setat = CurrentTime;
122			SetConfDatabase(conf);
123	adx	30
124	michael	2811	check_kline(add_conf_by_address(CONF_KLINE, conf));
125	michael	2810	}
126
127			/* already_placed_kline()
128			* inputs - user to complain to, username & host to check for
129			* outputs - returns 1 on existing K-line, 0 if doesn't exist
130			* side effects - notifies source_p if the K-line already exists
131			*/
132			/*
133			* Note: This currently works if the new K-line is a special case of an
134			* existing K-line, but not the other way round. To do that we would
135			* have to walk the hash and check every existing K-line. -A1kmm.
136			*/
137			static int
138			already_placed_kline(struct Client source_p, const char luser, const char *lhost, int warn)
139			{
140			struct irc_ssaddr iphost, *piphost;
141			struct MaskItem *conf = NULL;
142			int t = 0;
143			int aftype = 0;
144
145			if ((t = parse_netmask(lhost, &iphost, NULL)) != HM_HOST)
146			{
147			if (t == HM_IPV6)
148			aftype = AF_INET6;
149			else
150			aftype = AF_INET;
151			piphost = &iphost;
152			}
153			else
154			piphost = NULL;
155
156			if ((conf = find_conf_by_address(lhost, piphost, CONF_KLINE, aftype, luser, NULL, 0)))
157			{
158	michael	4635	if (IsClient(source_p) && warn)
159	michael	3110	sendto_one_notice(source_p, &me, ":[%s@%s] already K-Lined by [%s@%s] - %s",
160	michael	4665	luser, lhost, conf->user, conf->host, conf->reason);
161	michael	2810	return 1;
162			}
163
164			return 0;
165			}
166
167	adx	30	/* mo_kline()
168			*
169			* inputs - pointer to server
170			* - pointer to client
171			* - parameter count
172			* - parameter list
173			* output -
174			* side effects - k line is added
175			*/
176	michael	2820	static int
177	michael	3156	mo_kline(struct Client source_p, int parc, char parv[])
178	adx	30	{
179	michael	2810	char buffer[IRCD_BUFSIZE];
180	adx	30	char *reason = NULL;
181			char *user = NULL;
182			char *host = NULL;
183			char *target_server = NULL;
184	michael	1632	struct MaskItem *conf;
185	adx	30	time_t tkline_time = 0;
186
187	michael	4019	if (!HasOFlag(source_p, OPER_FLAG_KLINE))
188	adx	30	{
189	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "kline");
190	michael	2820	return 0;
191	adx	30	}
192
193	michael	5776	if (!parse_aline("KLINE", source_p, parc, parv, AWILD, &user, &host,
194			&tkline_time, &target_server, &reason))
195	michael	2820	return 0;
196	adx	30
197	michael	3368	if (target_server)
198	adx	30	{
199	michael	2804	sendto_match_servs(source_p, target_server, CAP_KLN, "KLINE %s %lu %s %s :%s",
200			target_server, (unsigned long)tkline_time,
201			user, host, reason);
202	adx	30
203			/* Allow ON to apply local kline as well if it matches */
204	michael	1652	if (match(target_server, me.name))
205	michael	2820	return 0;
206	adx	30	}
207			else
208			cluster_a_line(source_p, "KLINE", CAP_KLN, SHARED_KLINE,
209	michael	1058	"%d %s %s :%s", tkline_time, user, host, reason);
210	adx	30
211	michael	1243	if (already_placed_kline(source_p, user, host, 1))
212	michael	2820	return 0;
213	adx	30
214	michael	1632	conf = conf_make(CONF_KLINE);
215	michael	1646	conf->host = xstrdup(host);
216			conf->user = xstrdup(user);
217	adx	30
218	michael	3368	if (tkline_time)
219	michael	4673	snprintf(buffer, sizeof(buffer), "Temporary K-line %d min. - %.*s (%s)",
220	michael	4890	(int)(tkline_time/60), REASONLEN, reason, smalldate(0));
221	adx	30	else
222	michael	4890	snprintf(buffer, sizeof(buffer), "%.*s (%s)", REASONLEN, reason, smalldate(0));
223	adx	30
224	michael	1646	conf->reason = xstrdup(buffer);
225	michael	1632	m_kline_add_kline(source_p, conf, tkline_time);
226	michael	2820	return 0;
227	adx	30	}
228
229			/* me_kline - handle remote kline. no propagation */
230	michael	2820	static int
231	michael	4984	ms_kline(struct Client source_p, int parc, char parv[])
232	adx	30	{
233	michael	2810	char buffer[IRCD_BUFSIZE];
234	michael	1632	struct MaskItem *conf = NULL;
235	michael	3928	time_t tkline_time = 0;
236	michael	1622	char kuser, khost, *kreason;
237	adx	30
238	michael	352	if (parc != 6 \|\| EmptyString(parv[5]))
239	michael	2820	return 0;
240	adx	30
241	michael	4984	/* parv[0] parv[1] parv[2] parv[3] parv[4] parv[5] */
242			/* command target_server tkline_time user host reason */
243			sendto_match_servs(source_p, parv[1], CAP_KLN, "KLINE %s %s %s %s :%s",
244			parv[1], parv[2], parv[3], parv[4], parv[5]);
245
246	michael	1652	if (match(parv[1], me.name))
247	michael	2820	return 0;
248	adx	30
249			tkline_time = valid_tkline(parv[2], TK_SECONDS);
250			kuser = parv[3];
251			khost = parv[4];
252			kreason = parv[5];
253
254	michael	2810	if (HasFlag(source_p, FLAGS_SERVICE) \|\|
255			find_matching_name_conf(CONF_ULINE, source_p->servptr->name,
256	adx	30	source_p->username, source_p->host,
257			SHARED_KLINE))
258			{
259	michael	5791	if (!valid_wild_card(source_p, 2, kuser, khost))
260			return 0;
261
262	michael	4635	if (already_placed_kline(source_p, kuser, khost, 1))
263	michael	2820	return 0;
264	adx	30
265	michael	1632	conf = conf_make(CONF_KLINE);
266	michael	1646	conf->host = xstrdup(khost);
267			conf->user = xstrdup(kuser);
268	adx	30
269	michael	3368	if (tkline_time)
270	michael	4673	snprintf(buffer, sizeof(buffer), "Temporary K-line %u min. - %.*s (%s)",
271	michael	4890	(unsigned int)(tkline_time/60), REASONLEN, kreason, smalldate(0));
272	adx	30	else
273	michael	4890	snprintf(buffer, sizeof(buffer), "%.*s (%s)", REASONLEN, kreason, smalldate(0));
274	adx	30
275	michael	1646	conf->reason = xstrdup(buffer);
276	michael	1632	m_kline_add_kline(source_p, conf, tkline_time);
277	adx	30	}
278	michael	2820
279			return 0;
280	adx	30	}
281
282	michael	2810	static struct Message kline_msgtab =
283	adx	30	{
284	michael	4545	"KLINE", NULL, 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
285	michael	4984	{ m_unregistered, m_not_oper, ms_kline, m_ignore, mo_kline, m_ignore }
286	michael	1230	};
287
288			static void
289			module_init(void)
290			{
291			mod_add_cmd(&kline_msgtab);
292	michael	5796	add_capability("KLN", CAP_KLN);
293	michael	1230	}
294
295			static void
296			module_exit(void)
297			{
298			mod_del_cmd(&kline_msgtab);
299			delete_capability("KLN");
300			}
301
302	michael	2810	struct module module_entry =
303			{
304	michael	1230	.node = { NULL, NULL, NULL },
305			.name = NULL,
306			.version = "$Revision$",
307			.handle = NULL,
308			.modinit = module_init,
309			.modexit = module_exit,
310			.flags = 0
311			};