8.2.x/modules/m_dline.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2016 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_dline.c
 * \brief Includes required functions for processing the DLINE command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "client.h"
#include "irc_string.h"
#include "conf.h"
#include "conf_cluster.h"
#include "conf_shared.h"
#include "ircd.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 "memory.h"


static void
dline_check(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;

    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, CLIENT_BAN_DLINE, arec->conf->reason);
        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, CLIENT_BAN_DLINE, arec->conf->reason);
        break;
      default: break;
    }
  }

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

    if (IsDead(client_p))
      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, CLIENT_BAN_DLINE, arec->conf->reason);
        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, CLIENT_BAN_DLINE, arec->conf->reason);
        break;
      default: break;
    }
  }
}


/* dline_add()
 *
 * inputs       -
 * output       - NONE
 * side effects - dline as given is placed
 */
static void
dline_add(struct Client *source_p, const char *addr, const char *reason,
          uintmax_t duration)
{
  char buf[IRCD_BUFSIZE];

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

  struct MaskItem *conf = conf_make(CONF_DLINE);
  conf->host = xstrdup(addr);
  conf->reason = xstrdup(buf);
  conf->setat = CurrentTime;
  SetConfDatabase(conf);

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

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

    sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                         "%s added temporary %ju min. D-Line for [%s] [%s]",
                         get_oper_name(source_p), duration / 60,
                         conf->host, conf->reason);
    ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]",
         get_oper_name(source_p), duration / 60, conf->host, conf->reason);
  }
  else
  {
    if (IsClient(source_p))
      sendto_one_notice(source_p, &me, ":Added D-Line [%s]", conf->host);

    sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                         "%s added D-Line for [%s] [%s]",
                         get_oper_name(source_p), conf->host, conf->reason);
    ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]",
         get_oper_name(source_p), conf->host, conf->reason);
  }

  dline_check(add_conf_by_address(CONF_DLINE, conf));
}

/* mo_dline()
 *
 * inputs       - pointer to server
 *              - pointer to client
 *              - parameter count
 *              - parameter list
 * output       -
 * side effects - D line is added
 *
 */
static int
mo_dline(struct Client *source_p, int parc, char *parv[])
{
  char *dlhost = NULL, *reason = NULL;
  char *target_server = NULL;
  const struct Client *target_p = NULL;
  struct irc_ssaddr daddr;
  struct MaskItem *conf = NULL;
  uintmax_t duration = 0;
  int bits = 0, aftype = 0, t = 0;
  char hostip[HOSTIPLEN + 1];

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

  if (!parse_aline("DLINE", source_p, parc, parv, AWILD, &dlhost,
                   NULL, &duration, &target_server, &reason))
    return 0;

  if (target_server)
  {
    sendto_match_servs(source_p, target_server, CAPAB_DLN, "DLINE %s %ju %s :%s",
                       target_server, duration,
                       dlhost, reason);

    /* Allow ON to apply local dline as well if it matches */
    if (match(target_server, me.name))
      return 0;
  }
  else
    cluster_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE,
                       "%ju %s :%s", duration, dlhost, reason);

  if ((t = parse_netmask(dlhost, NULL, NULL)) == HM_HOST)
  {
    if ((target_p = find_chasing(source_p, dlhost)) == NULL)
      return 0;  /* find_chasing sends ERR_NOSUCHNICK */

    if (!MyConnect(target_p))
    {
      sendto_one_notice(source_p, &me, ":Cannot DLINE nick on another server");
      return 0;
    }

    if (HasFlag(target_p, FLAGS_EXEMPTKLINE))
    {
      sendto_one_notice(source_p, &me, ":%s is E-lined", target_p->name);
      return 0;
    }

    getnameinfo((const struct sockaddr *)&target_p->connection->ip,
                target_p->connection->ip.ss_len, hostip,
                sizeof(hostip), NULL, 0, NI_NUMERICHOST);
    dlhost = hostip;
  }

  switch (parse_netmask(dlhost, &daddr, &bits))
  {
    case HM_IPV4:
      if ((unsigned int)bits < ConfigGeneral.dline_min_cidr)
      {
        sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                          ConfigGeneral.dline_min_cidr);
        return 0;
      }

      aftype = AF_INET;
      break;
    case HM_IPV6:
      if ((unsigned int)bits < ConfigGeneral.dline_min_cidr6)
      {
        sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                          ConfigGeneral.dline_min_cidr6);
        return 0;
      }

      aftype = AF_INET6;
      break;
    default:  /* HM_HOST */
     return 0;
  }

  if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1)))
  {
    sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
                      dlhost, conf->host, conf->reason);
    return 0;
  }

  dline_add(source_p, dlhost, reason, duration);
  return 0;
}

/*! \brief DLINE 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] = IP address
 *      - parv[4] = reason
 */
static int
ms_dline(struct Client *source_p, int parc, char *parv[])
{
  const char *dlhost, *reason;
  struct irc_ssaddr daddr;
  struct MaskItem *conf = NULL;
  uintmax_t duration = 0;
  int bits = 0, aftype = 0;

  if (parc != 5 || EmptyString(parv[4]))
    return 0;

  sendto_match_servs(source_p, parv[1], CAPAB_DLN, "DLINE %s %s %s :%s",
                     parv[1], parv[2], parv[3], parv[4]);

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

  duration = valid_tkline(parv[2], TK_SECONDS);
  dlhost = parv[3];
  reason = parv[4];

  if (HasFlag(source_p, FLAGS_SERVICE) ||
      shared_find(SHARED_DLINE, source_p->servptr->name,
                  source_p->username, source_p->host))
  {
    switch (parse_netmask(dlhost, &daddr, &bits))
    {
      case HM_IPV4:
        if ((unsigned int)bits < ConfigGeneral.dline_min_cidr)
        {
          if (IsClient(source_p))
            sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                              ConfigGeneral.dline_min_cidr);
          return 0;
        }

        aftype = AF_INET;
        break;
      case HM_IPV6:
        if ((unsigned int)bits < ConfigGeneral.dline_min_cidr6)
        {
          if (IsClient(source_p))
            sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
                              ConfigGeneral.dline_min_cidr6);
          return 0;
        }

        aftype = AF_INET6;
        break;
      default:  /* HM_HOST */
       return 0;
    }

    if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1)))
    {
      if (IsClient(source_p))
        sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
                          dlhost, conf->host, conf->reason);
      return 0;
    }

    dline_add(source_p, dlhost, reason, duration);
  }

  return 0;
}

static struct Message dline_msgtab =
{
  .cmd = "DLINE",
  .args_min = 2,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_not_oper,
  .handlers[SERVER_HANDLER] = ms_dline,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_dline
};

static void
module_init(void)
{
  mod_add_cmd(&dline_msgtab);
  add_capability("DLN", CAPAB_DLN);
}

static void
module_exit(void)
{
  mod_del_cmd(&dline_msgtab);
  delete_capability("DLN");
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	7329
Committed:	Thu Feb 18 21:07:50 2016 UTC (10 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	10711 byte(s)
Log Message:	- Now that we got time_t to work nicely on openbsd with snprintf's conversion specifiers, we ran into a similiar issue on Raspbian/ARMv7's time_t which is of signed 32 bit and doesn't cope at all with %j. Instead of doing tricks, get rid of time_t everywhere and forever and use uintmax_t instead which has at least a 'standardized' conversion specifier associated with it.
#	User	Rev	Content
1	michael	1058	/*
2	michael	2810	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	michael	1058	*
4	michael	7007	* Copyright (c) 1997-2016 ircd-hybrid development team
5	michael	1058	*
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	4564	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	michael	1058	* USA
20			*/
21
22	michael	2810	/*! \file m_dline.c
23	michael	3348	* \brief Includes required functions for processing the DLINE command.
24	michael	2810	* \version $Id$
25			*/
26
27	michael	1058	#include "stdinc.h"
28			#include "list.h"
29			#include "client.h"
30			#include "irc_string.h"
31	michael	1632	#include "conf.h"
32	michael	7208	#include "conf_cluster.h"
33			#include "conf_shared.h"
34	michael	1058	#include "ircd.h"
35			#include "hostmask.h"
36			#include "numeric.h"
37	michael	1309	#include "log.h"
38	michael	3347	#include "misc.h"
39	michael	1058	#include "send.h"
40	michael	3347	#include "server.h"
41	michael	1058	#include "parse.h"
42			#include "modules.h"
43	michael	1666	#include "memory.h"
44	michael	1058
45
46	michael	3930	static void
47	michael	5831	dline_check(struct AddressRec *arec)
48	michael	3930	{
49	michael	4816	dlink_node node = NULL, node_next = NULL;
50	michael	3930
51	michael	4816	DLINK_FOREACH_SAFE(node, node_next, local_client_list.head)
52	michael	3930	{
53	michael	4816	struct Client *client_p = node->data;
54	michael	3930
55			if (IsDead(client_p))
56			continue;
57
58			switch (arec->masktype)
59			{
60			case HM_IPV4:
61	michael	4589	if (client_p->connection->aftype == AF_INET)
62			if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
63	michael	7303	conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
64	michael	3930	break;
65			case HM_IPV6:
66	michael	4589	if (client_p->connection->aftype == AF_INET6)
67			if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
68	michael	7303	conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
69	michael	3930	break;
70			default: break;
71			}
72			}
73
74	michael	4816	DLINK_FOREACH_SAFE(node, node_next, unknown_list.head)
75	michael	3930	{
76	michael	4816	struct Client *client_p = node->data;
77	michael	3930
78			if (IsDead(client_p))
79			continue;
80
81			switch (arec->masktype)
82			{
83			case HM_IPV4:
84	michael	4589	if (client_p->connection->aftype == AF_INET)
85			if (match_ipv4(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
86	michael	7303	conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
87	michael	3930	break;
88			case HM_IPV6:
89	michael	4589	if (client_p->connection->aftype == AF_INET6)
90			if (match_ipv6(&client_p->connection->ip, &arec->Mask.ipa.addr, arec->Mask.ipa.bits))
91	michael	7303	conf_try_ban(client_p, CLIENT_BAN_DLINE, arec->conf->reason);
92	michael	3930	break;
93			default: break;
94			}
95			}
96			}
97
98
99	michael	5830	/* dline_add()
100	michael	1058	*
101			* inputs -
102			* output - NONE
103	michael	5830	* side effects - dline as given is placed
104	michael	1058	*/
105			static void
106	michael	5874	dline_add(struct Client source_p, const char addr, const char *reason,
107	michael	7329	uintmax_t duration)
108	michael	1058	{
109	michael	5830	char buf[IRCD_BUFSIZE];
110
111	michael	6457	if (duration)
112	michael	6781	snprintf(buf, sizeof(buf), "Temporary D-line %ju min. - %.*s (%s)",
113			duration / 60, REASONLEN, reason, date_iso8601(0));
114	michael	5830	else
115	michael	6421	snprintf(buf, sizeof(buf), "%.*s (%s)", REASONLEN, reason, date_iso8601(0));
116	michael	5830
117	michael	7075	struct MaskItem *conf = conf_make(CONF_DLINE);
118	michael	5830	conf->host = xstrdup(addr);
119			conf->reason = xstrdup(buf);
120			conf->setat = CurrentTime;
121			SetConfDatabase(conf);
122
123	michael	6457	if (duration)
124	michael	1622	{
125	michael	6457	conf->until = CurrentTime + duration;
126	michael	4640
127			if (IsClient(source_p))
128	michael	6781	sendto_one_notice(source_p, &me, ":Added temporary %ju min. D-Line [%s]",
129			duration / 60, conf->host);
130	michael	4889
131	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
132	michael	6781	"%s added temporary %ju min. D-Line for [%s] [%s]",
133	michael	6938	get_oper_name(source_p), duration / 60,
134	michael	1632	conf->host, conf->reason);
135	michael	6781	ilog(LOG_TYPE_DLINE, "%s added temporary %ju min. D-Line for [%s] [%s]",
136			get_oper_name(source_p), duration / 60, conf->host, conf->reason);
137	michael	1622	}
138			else
139			{
140	michael	4640	if (IsClient(source_p))
141			sendto_one_notice(source_p, &me, ":Added D-Line [%s]", conf->host);
142
143	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
144	michael	1622	"%s added D-Line for [%s] [%s]",
145	michael	1632	get_oper_name(source_p), conf->host, conf->reason);
146	michael	1622	ilog(LOG_TYPE_DLINE, "%s added D-Line for [%s] [%s]",
147	michael	1632	get_oper_name(source_p), conf->host, conf->reason);
148	michael	1622	}
149
150	michael	5831	dline_check(add_conf_by_address(CONF_DLINE, conf));
151	michael	1058	}
152
153			/* mo_dline()
154			*
155			* inputs - pointer to server
156			* - pointer to client
157			* - parameter count
158			* - parameter list
159			* output -
160			* side effects - D line is added
161			*
162			*/
163	michael	2820	static int
164	michael	3156	mo_dline(struct Client source_p, int parc, char parv[])
165	michael	1058	{
166	michael	1622	char dlhost = NULL, reason = NULL;
167	michael	1301	char *target_server = NULL;
168	michael	1058	const struct Client *target_p = NULL;
169			struct irc_ssaddr daddr;
170	michael	4889	struct MaskItem *conf = NULL;
171	michael	7329	uintmax_t duration = 0;
172	michael	1644	int bits = 0, aftype = 0, t = 0;
173	michael	1398	char hostip[HOSTIPLEN + 1];
174	michael	1058
175	michael	1301	if (!HasOFlag(source_p, OPER_FLAG_DLINE))
176	michael	1058	{
177	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "dline");
178	michael	2820	return 0;
179	michael	1058	}
180
181	michael	5775	if (!parse_aline("DLINE", source_p, parc, parv, AWILD, &dlhost,
182	michael	6457	NULL, &duration, &target_server, &reason))
183	michael	2820	return 0;
184	michael	1058
185	michael	3368	if (target_server)
186	michael	1301	{
187	michael	6781	sendto_match_servs(source_p, target_server, CAPAB_DLN, "DLINE %s %ju %s :%s",
188			target_server, duration,
189	michael	2807	dlhost, reason);
190	michael	1301
191	michael	6431	/* Allow ON to apply local dline as well if it matches */
192	michael	1652	if (match(target_server, me.name))
193	michael	2820	return 0;
194	michael	1301	}
195			else
196	michael	7208	cluster_distribute(source_p, "DLINE", CAPAB_DLN, CLUSTER_DLINE,
197			"%ju %s :%s", duration, dlhost, reason);
198	michael	1301
199	michael	5821	if ((t = parse_netmask(dlhost, NULL, NULL)) == HM_HOST)
200	michael	1058	{
201	michael	3192	if ((target_p = find_chasing(source_p, dlhost)) == NULL)
202	michael	3736	return 0; /* find_chasing sends ERR_NOSUCHNICK */
203	michael	1058
204			if (!MyConnect(target_p))
205			{
206	michael	3118	sendto_one_notice(source_p, &me, ":Cannot DLINE nick on another server");
207	michael	2820	return 0;
208	michael	1058	}
209
210	michael	6314	if (HasFlag(target_p, FLAGS_EXEMPTKLINE))
211	michael	1058	{
212	michael	4935	sendto_one_notice(source_p, &me, ":%s is E-lined", target_p->name);
213	michael	2820	return 0;
214	michael	1058	}
215
216	michael	5050	getnameinfo((const struct sockaddr *)&target_p->connection->ip,
217	michael	4589	target_p->connection->ip.ss_len, hostip,
218	michael	1123	sizeof(hostip), NULL, 0, NI_NUMERICHOST);
219	michael	1058	dlhost = hostip;
220			}
221
222	michael	5820	switch (parse_netmask(dlhost, &daddr, &bits))
223	michael	1058	{
224	michael	5810	case HM_IPV4:
225			if ((unsigned int)bits < ConfigGeneral.dline_min_cidr)
226			{
227			sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
228			ConfigGeneral.dline_min_cidr);
229			return 0;
230			}
231
232			aftype = AF_INET;
233			break;
234			case HM_IPV6:
235			if ((unsigned int)bits < ConfigGeneral.dline_min_cidr6)
236			{
237			sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
238			ConfigGeneral.dline_min_cidr6);
239			return 0;
240			}
241
242			aftype = AF_INET6;
243			break;
244			default: /* HM_HOST */
245			return 0;
246	michael	1058	}
247
248	michael	5810	if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1)))
249	michael	1058	{
250	michael	5810	sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
251			dlhost, conf->host, conf->reason);
252	michael	2820	return 0;
253	michael	1058	}
254
255	michael	6457	dline_add(source_p, dlhost, reason, duration);
256	michael	2820	return 0;
257	michael	1058	}
258
259	michael	7093	/*! \brief DLINE command handler
260			*
261			* \param source_p Pointer to allocated Client struct from which the message
262			* originally comes from. This can be a local or remote client.
263			* \param parc Integer holding the number of supplied arguments.
264			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
265			* pointers.
266			* \note Valid arguments for this command are:
267			* - parv[0] = command
268			* - parv[1] = target server mask
269			* - parv[2] = duration in seconds
270			* - parv[3] = IP address
271			* - parv[4] = reason
272			*/
273	michael	2820	static int
274	michael	3156	ms_dline(struct Client source_p, int parc, char parv[])
275	michael	1301	{
276	michael	5830	const char dlhost, reason;
277	michael	1301	struct irc_ssaddr daddr;
278	michael	4889	struct MaskItem *conf = NULL;
279	michael	7329	uintmax_t duration = 0;
280	michael	5817	int bits = 0, aftype = 0;
281	michael	1301
282			if (parc != 5 \|\| EmptyString(parv[4]))
283	michael	2820	return 0;
284	michael	1301
285	michael	6353	sendto_match_servs(source_p, parv[1], CAPAB_DLN, "DLINE %s %s %s :%s",
286	michael	1301	parv[1], parv[2], parv[3], parv[4]);
287
288	michael	1652	if (match(parv[1], me.name))
289	michael	2820	return 0;
290	michael	1301
291	michael	6457	duration = valid_tkline(parv[2], TK_SECONDS);
292	michael	1301	dlhost = parv[3];
293			reason = parv[4];
294
295	michael	2810	if (HasFlag(source_p, FLAGS_SERVICE) \|\|
296	michael	7208	shared_find(SHARED_DLINE, source_p->servptr->name,
297			source_p->username, source_p->host))
298	michael	1301	{
299	michael	5817	switch (parse_netmask(dlhost, &daddr, &bits))
300	michael	1301	{
301	michael	5810	case HM_IPV4:
302			if ((unsigned int)bits < ConfigGeneral.dline_min_cidr)
303			{
304			if (IsClient(source_p))
305			sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
306			ConfigGeneral.dline_min_cidr);
307			return 0;
308			}
309
310			aftype = AF_INET;
311			break;
312			case HM_IPV6:
313			if ((unsigned int)bits < ConfigGeneral.dline_min_cidr6)
314			{
315			if (IsClient(source_p))
316			sendto_one_notice(source_p, &me, ":For safety, bitmasks less than %u require conf access.",
317			ConfigGeneral.dline_min_cidr6);
318			return 0;
319			}
320
321			aftype = AF_INET6;
322			break;
323			default: /* HM_HOST */
324			return 0;
325	michael	1301	}
326
327	michael	5810	if ((conf = find_conf_by_address(NULL, &daddr, CONF_DLINE, aftype, NULL, NULL, 1)))
328	michael	1301	{
329	michael	5810	if (IsClient(source_p))
330	michael	3110	sendto_one_notice(source_p, &me, ":[%s] already D-lined by [%s] - %s",
331	michael	5810	dlhost, conf->host, conf->reason);
332	michael	2820	return 0;
333	michael	1301	}
334
335	michael	6457	dline_add(source_p, dlhost, reason, duration);
336	michael	1301	}
337	michael	2820
338			return 0;
339	michael	1301	}
340
341	michael	2810	static struct Message dline_msgtab =
342			{
343	michael	5880	.cmd = "DLINE",
344			.args_min = 2,
345			.args_max = MAXPARA,
346			.handlers[UNREGISTERED_HANDLER] = m_unregistered,
347			.handlers[CLIENT_HANDLER] = m_not_oper,
348			.handlers[SERVER_HANDLER] = ms_dline,
349			.handlers[ENCAP_HANDLER] = m_ignore,
350			.handlers[OPER_HANDLER] = mo_dline
351	michael	1230	};
352
353			static void
354			module_init(void)
355			{
356			mod_add_cmd(&dline_msgtab);
357	michael	6353	add_capability("DLN", CAPAB_DLN);
358	michael	1230	}
359
360			static void
361			module_exit(void)
362			{
363			mod_del_cmd(&dline_msgtab);
364	michael	1301	delete_capability("DLN");
365	michael	1230	}
366
367	michael	2810	struct module module_entry =
368			{
369	michael	1230	.version = "$Revision$",
370			.modinit = module_init,
371			.modexit = module_exit,
372			};