8.2.x/modules/m_kline.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2019 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 "conf_cluster.h"
#include "conf_shared.h"
#include "hostmask.h"
#include "numeric.h"
#include "log.h"
#include "misc.h"
#include "send.h"
#include "server_capab.h"
#include "parse.h"
#include "modules.h"
#include "memory.h"


static void
kline_check(const struct AddressRec *arec)
{
  dlink_node *node, *node_next;

  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->ip.ss.ss_family == AF_INET)
          if (match_ipv4(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
            conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
        break;
      case HM_IPV6:
        if (client_p->ip.ss.ss_family == AF_INET6)
          if (match_ipv6(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
            conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
        break;
      default:  /* HM_HOST */
        if (match(arec->Mask.hostname, client_p->host) == 0 || match(arec->Mask.hostname, client_p->sockhost) == 0)
          conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
        break;
    }
  }
}

/* apply_tkline()
 *
 * inputs       -
 * output       - NONE
 * side effects - tkline as given is placed
 */
static void
kline_handle(struct Client *source_p, struct aline_ctx *aline)
{
  char buf[IRCD_BUFSIZE];
  int bits = 0;
  struct irc_ssaddr iphost, *piphost = NULL;

  if (!HasFlag(source_p, FLAGS_SERVICE) && valid_wild_card(2, aline->user, aline->host) == false)
  {
    sendto_one_notice(source_p, &me,
                      ":Please include at least %u non-wildcard characters with the mask",
                      ConfigGeneral.min_nonwildcard);
    return;
  }

  switch (parse_netmask(aline->host, &iphost, &bits))
  {
    case HM_IPV4:
      if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.kline_min_cidr)
      {
        if (IsClient(source_p))
          sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                            ConfigGeneral.kline_min_cidr);
        return;
      }

      piphost = &iphost;
      break;
    case HM_IPV6:
      if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.kline_min_cidr6)
      {
        if (IsClient(source_p))
          sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                            ConfigGeneral.kline_min_cidr6);
        return;
      }

      piphost = &iphost;
      break;
    default:  /* HM_HOST */
      break;
  }

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

  if (aline->duration)
    snprintf(buf, sizeof(buf), "Temporary K-line %ju min. - %.*s (%s)",
             aline->duration / 60, REASONLEN, aline->reason, date_iso8601(0));
  else
    snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, aline->reason, date_iso8601(0));

  conf = conf_make(CONF_KLINE);
  conf->user = xstrdup(aline->user);
  conf->host = xstrdup(aline->host);
  conf->setat = CurrentTime;
  conf->reason = xstrdup(buf);
  SetConfDatabase(conf);

  if (aline->duration)
  {
    conf->until = CurrentTime + aline->duration;

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

    sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                         "%s added temporary %ju min. K-Line for [%s@%s] [%s]",
                         get_oper_name(source_p), aline->duration / 60,
                         conf->user, conf->host,
                         conf->reason);
    ilog(LOG_TYPE_KLINE, "%s added temporary %ju min. K-Line for [%s@%s] [%s]",
         get_oper_name(source_p), aline->duration / 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_SERVNOTICE, 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);
  }

  kline_check(add_conf_by_address(CONF_KLINE, conf));
}

/* 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[])
{
  struct aline_ctx aline = { .add = true, .simple_mask = false };

  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, &aline) == false)
    return 0;

  if (aline.server)
  {
    sendto_match_servs(source_p, aline.server, CAPAB_KLN, "KLINE %s %ju %s %s :%s",
                       aline.server, aline.duration,
                       aline.user, aline.host, aline.reason);

    /* Allow ON to apply local kline as well if it matches */
    if (match(aline.server, me.name))
      return 0;
  }
  else
    cluster_distribute(source_p, "KLINE", CAPAB_KLN, CLUSTER_KLINE, "%ju %s %s :%s",
                       aline.duration, aline.user, aline.host, aline.reason);

  kline_handle(source_p, &aline);
  return 0;
}

/*! \brief KLINE 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] = target server mask
 *      - parv[2] = duration in seconds
 *      - parv[3] = user mask
 *      - parv[4] = host mask
 *      - parv[5] = reason
 */
static int
ms_kline(struct Client *source_p, int parc, char *parv[])
{
  struct aline_ctx aline =
  {
    .add = true,
    .simple_mask = false,
    .user = parv[3],
    .host = parv[4],
    .reason = parv[5],
    .server = parv[1],
    .duration = strtoumax(parv[2], NULL, 10)
  };

  if (parc != 6 || EmptyString(parv[parc - 1]))
    return 0;

  sendto_match_servs(source_p, aline.server, CAPAB_KLN, "KLINE %s %ju %s %s :%s", aline.server,
                     aline.duration, aline.user, aline.host, aline.reason);

  if (match(aline.server, me.name))
    return 0;

  if (HasFlag(source_p, FLAGS_SERVICE) ||
      shared_find(SHARED_KLINE, source_p->servptr->name,
                  source_p->username, source_p->host))
    kline_handle(source_p, &aline);

  return 0;
}

static struct Message kline_msgtab =
{
  .cmd = "KLINE",
  .args_min = 2,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_not_oper,
  .handlers[SERVER_HANDLER] = ms_kline,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_kline
};

static void
module_init(void)
{
  mod_add_cmd(&kline_msgtab);
  capab_add("KLN", CAPAB_KLN);
}

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	8828
Committed:	Sat Feb 2 16:49:32 2019 UTC (7 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	9077 byte(s)
Log Message:	- conf_connect_allowed, find_conf_by_address, find_address_conf, find_dline_conf: drop the aftype argument
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2019 ircd-hybrid development team
5	*
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file m_kline.c
23	* \brief Includes required functions for processing the KLINE command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "client.h"
30	#include "irc_string.h"
31	#include "ircd.h"
32	#include "conf.h"
33	#include "conf_cluster.h"
34	#include "conf_shared.h"
35	#include "hostmask.h"
36	#include "numeric.h"
37	#include "log.h"
38	#include "misc.h"
39	#include "send.h"
40	#include "server_capab.h"
41	#include "parse.h"
42	#include "modules.h"
43	#include "memory.h"
44
45
46	static void
47	kline_check(const struct AddressRec *arec)
48	{
49	dlink_node node, node_next;
50
51	DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
52	{
53	struct Client *client_p = node->data;
54
55	if (IsDead(client_p))
56	continue;
57
58	if (match(arec->username, client_p->username))
59	continue;
60
61	switch (arec->masktype)
62	{
63	case HM_IPV4:
64	if (client_p->ip.ss.ss_family == AF_INET)
65	if (match_ipv4(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
66	conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
67	break;
68	case HM_IPV6:
69	if (client_p->ip.ss.ss_family == AF_INET6)
70	if (match_ipv6(&client_p->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
71	conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
72	break;
73	default: /* HM_HOST */
74	if (match(arec->Mask.hostname, client_p->host) == 0 \|\| match(arec->Mask.hostname, client_p->sockhost) == 0)
75	conf_try_ban(client_p, CLIENT_BAN_KLINE, arec->conf->reason);
76	break;
77	}
78	}
79	}
80
81	/* apply_tkline()
82	*
83	* inputs -
84	* output - NONE
85	* side effects - tkline as given is placed
86	*/
87	static void
88	kline_handle(struct Client source_p, struct aline_ctx aline)
89	{
90	char buf[IRCD_BUFSIZE];
91	int bits = 0;
92	struct irc_ssaddr iphost, *piphost = NULL;
93
94	if (!HasFlag(source_p, FLAGS_SERVICE) && valid_wild_card(2, aline->user, aline->host) == false)
95	{
96	sendto_one_notice(source_p, &me,
97	":Please include at least %u non-wildcard characters with the mask",
98	ConfigGeneral.min_nonwildcard);
99	return;
100	}
101
102	switch (parse_netmask(aline->host, &iphost, &bits))
103	{
104	case HM_IPV4:
105	if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.kline_min_cidr)
106	{
107	if (IsClient(source_p))
108	sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
109	ConfigGeneral.kline_min_cidr);
110	return;
111	}
112
113	piphost = &iphost;
114	break;
115	case HM_IPV6:
116	if (!HasFlag(source_p, FLAGS_SERVICE) && (unsigned int)bits < ConfigGeneral.kline_min_cidr6)
117	{
118	if (IsClient(source_p))
119	sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
120	ConfigGeneral.kline_min_cidr6);
121	return;
122	}
123
124	piphost = &iphost;
125	break;
126	default: /* HM_HOST */
127	break;
128	}
129
130	struct MaskItem *conf;
131	if ((conf = find_conf_by_address(aline->host, piphost, CONF_KLINE, aline->user, NULL, 0)))
132	{
133	if (IsClient(source_p))
134	sendto_one_notice(source_p, &me, ":[%s@%s] already K-Lined by [%s@%s] - %s",
135	aline->user, aline->host, conf->user, conf->host, conf->reason);
136	return;
137	}
138
139	if (aline->duration)
140	snprintf(buf, sizeof(buf), "Temporary K-line %ju min. - %.*s (%s)",
141	aline->duration / 60, REASONLEN, aline->reason, date_iso8601(0));
142	else
143	snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, aline->reason, date_iso8601(0));
144
145	conf = conf_make(CONF_KLINE);
146	conf->user = xstrdup(aline->user);
147	conf->host = xstrdup(aline->host);
148	conf->setat = CurrentTime;
149	conf->reason = xstrdup(buf);
150	SetConfDatabase(conf);
151
152	if (aline->duration)
153	{
154	conf->until = CurrentTime + aline->duration;
155
156	if (IsClient(source_p))
157	sendto_one_notice(source_p, &me, ":Added temporary %ju min. K-Line [%s@%s]",
158	aline->duration / 60, conf->user, conf->host);
159
160	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
161	"%s added temporary %ju min. K-Line for [%s@%s] [%s]",
162	get_oper_name(source_p), aline->duration / 60,
163	conf->user, conf->host,
164	conf->reason);
165	ilog(LOG_TYPE_KLINE, "%s added temporary %ju min. K-Line for [%s@%s] [%s]",
166	get_oper_name(source_p), aline->duration / 60,
167	conf->user, conf->host, conf->reason);
168	}
169	else
170	{
171	if (IsClient(source_p))
172	sendto_one_notice(source_p, &me, ":Added K-Line [%s@%s]",
173	conf->user, conf->host);
174
175	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
176	"%s added K-Line for [%s@%s] [%s]",
177	get_oper_name(source_p),
178	conf->user, conf->host, conf->reason);
179	ilog(LOG_TYPE_KLINE, "%s added K-Line for [%s@%s] [%s]",
180	get_oper_name(source_p), conf->user, conf->host, conf->reason);
181	}
182
183	kline_check(add_conf_by_address(CONF_KLINE, conf));
184	}
185
186	/* mo_kline()
187	*
188	* inputs - pointer to server
189	* - pointer to client
190	* - parameter count
191	* - parameter list
192	* output -
193	* side effects - k line is added
194	*/
195	static int
196	mo_kline(struct Client source_p, int parc, char parv[])
197	{
198	struct aline_ctx aline = { .add = true, .simple_mask = false };
199
200	if (!HasOFlag(source_p, OPER_FLAG_KLINE))
201	{
202	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "kline");
203	return 0;
204	}
205
206	if (parse_aline("KLINE", source_p, parc, parv, &aline) == false)
207	return 0;
208
209	if (aline.server)
210	{
211	sendto_match_servs(source_p, aline.server, CAPAB_KLN, "KLINE %s %ju %s %s :%s",
212	aline.server, aline.duration,
213	aline.user, aline.host, aline.reason);
214
215	/* Allow ON to apply local kline as well if it matches */
216	if (match(aline.server, me.name))
217	return 0;
218	}
219	else
220	cluster_distribute(source_p, "KLINE", CAPAB_KLN, CLUSTER_KLINE, "%ju %s %s :%s",
221	aline.duration, aline.user, aline.host, aline.reason);
222
223	kline_handle(source_p, &aline);
224	return 0;
225	}
226
227	/*! \brief KLINE command handler
228	*
229	* \param source_p Pointer to allocated Client struct from which the message
230	* originally comes from. This can be a local or remote client.
231	* \param parc Integer holding the number of supplied arguments.
232	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
233	* pointers.
234	* \note Valid arguments for this command are:
235	* - parv[0] = command
236	* - parv[1] = target server mask
237	* - parv[2] = duration in seconds
238	* - parv[3] = user mask
239	* - parv[4] = host mask
240	* - parv[5] = reason
241	*/
242	static int
243	ms_kline(struct Client source_p, int parc, char parv[])
244	{
245	struct aline_ctx aline =
246	{
247	.add = true,
248	.simple_mask = false,
249	.user = parv[3],
250	.host = parv[4],
251	.reason = parv[5],
252	.server = parv[1],
253	.duration = strtoumax(parv[2], NULL, 10)
254	};
255
256	if (parc != 6 \|\| EmptyString(parv[parc - 1]))
257	return 0;
258
259	sendto_match_servs(source_p, aline.server, CAPAB_KLN, "KLINE %s %ju %s %s :%s", aline.server,
260	aline.duration, aline.user, aline.host, aline.reason);
261
262	if (match(aline.server, me.name))
263	return 0;
264
265	if (HasFlag(source_p, FLAGS_SERVICE) \|\|
266	shared_find(SHARED_KLINE, source_p->servptr->name,
267	source_p->username, source_p->host))
268	kline_handle(source_p, &aline);
269
270	return 0;
271	}
272
273	static struct Message kline_msgtab =
274	{
275	.cmd = "KLINE",
276	.args_min = 2,
277	.args_max = MAXPARA,
278	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
279	.handlers[CLIENT_HANDLER] = m_not_oper,
280	.handlers[SERVER_HANDLER] = ms_kline,
281	.handlers[ENCAP_HANDLER] = m_ignore,
282	.handlers[OPER_HANDLER] = mo_kline
283	};
284
285	static void
286	module_init(void)
287	{
288	mod_add_cmd(&kline_msgtab);
289	capab_add("KLN", CAPAB_KLN);
290	}
291
292	static void
293	module_exit(void)
294	{
295	mod_del_cmd(&kline_msgtab);
296	capab_del("KLN");
297	}
298
299	struct module module_entry =
300	{
301	.version = "$Revision$",
302	.modinit = module_init,
303	.modexit = module_exit,
304	};