8.2.x/modules/m_dline.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_dline.c: Bans a user.
 *
 *  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 "client.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "hostmask.h"
#include "numeric.h"
#include "fdlist.h"
#include "s_bsd.h"
#include "s_conf.h"
#include "s_log.h"
#include "s_misc.h"
#include "send.h"
#include "hash.h"
#include "s_serv.h"
#include "s_gline.h"
#include "parse.h"
#include "modules.h"


static int remove_tdline_match(const char *);

/* apply_tdline()
 *
 * inputs       -
 * output       - NONE
 * side effects - tkline as given is placed
 */
static void
apply_tdline(struct Client *source_p, struct ConfItem *conf,
             const char *current_date, int tkline_time)
{
  struct AccessItem *aconf;

  aconf = map_to_conf(conf);
  aconf->hold = CurrentTime + tkline_time;

  add_temp_line(conf);
  sendto_realops_flags(UMODE_ALL, L_ALL,
                       "%s added temporary %d min. D-Line for [%s] [%s]",
                       get_oper_name(source_p), tkline_time/60,
                       aconf->host, aconf->reason);

  sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line [%s]",
             MyConnect(source_p) ? me.name : ID_or_name(&me, source_p->from),
             source_p->name, tkline_time/60, aconf->host);
  ilog(L_TRACE, "%s added temporary %d min. D-Line for [%s] [%s]",
       source_p->name, tkline_time/60, aconf->host, aconf->reason);
  log_oper_action(LOG_TEMP_DLINE_TYPE, source_p, "[%s@%s] [%s]\n",
                  aconf->user, aconf->host, aconf->reason);
  rehashed_klines = 1;
}

/* mo_dline()
 *
 * inputs       - pointer to server
 *              - pointer to client
 *              - parameter count
 *              - parameter list
 * output       -
 * side effects - D line is added
 *
 */
static void
mo_dline(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  char def_reason[] = "No reason";
  char *dlhost, *oper_reason, *reason;
  const char *creason;
  const struct Client *target_p = NULL;
  struct irc_ssaddr daddr;
  struct ConfItem *conf=NULL;
  struct AccessItem *aconf=NULL;
  time_t tkline_time=0;
  int bits, t;
  const char *current_date = NULL;
  time_t cur_time;
  char hostip[HOSTIPLEN];
  char buffer[IRCD_BUFSIZE];

  if (!HasOFlag(source_p, OPER_FLAG_K))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "kline");
    return;
  }

  if (parse_aline("DLINE", source_p,  parc, parv, AWILD, &dlhost,
                  NULL, &tkline_time, NULL, &reason) < 0)
    return;

  if ((t = parse_netmask(dlhost, NULL, &bits)) == HM_HOST)
  {
    if ((target_p = find_chasing(client_p, source_p, dlhost, NULL)) == NULL)
      return;

    if (!MyConnect(target_p))
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :Can't DLINE nick on another server",
                 me.name, source_p->name);
      return;
    }

    if (IsExemptKline(target_p))
    {
      sendto_one(source_p,
                 ":%s NOTICE %s :%s is E-lined", me.name,
                 source_p->name, target_p->name);
      return;
    }

    getnameinfo((struct sockaddr *)&target_p->localClient->ip,
                target_p->localClient->ip.ss_len, hostip,
                sizeof(hostip), NULL, 0, NI_NUMERICHOST);
    dlhost = hostip;
    t = parse_netmask(dlhost, NULL, &bits);
    assert(t == HM_IPV4 || t == HM_IPV6);
  }

  if (bits < 8)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.",
               me.name, source_p->name);
    return;
  }

#ifdef IPV6
  if (t == HM_IPV6)
    t = AF_INET6;
  else
#endif
    t = AF_INET;

  parse_netmask(dlhost, &daddr, NULL);

  if ((aconf = find_dline_conf(&daddr, t)) != NULL)
  {
    creason = aconf->reason ? aconf->reason : def_reason;
    if (IsConfExemptKline(aconf))
      sendto_one(source_p,
                 ":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
                 me.name, source_p->name, dlhost, aconf->host, creason);
    else
      sendto_one(source_p,
                 ":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
                 me.name, source_p->name, dlhost, aconf->host, creason);
    return;
  }

  cur_time = CurrentTime;
  current_date = smalldate(cur_time);

  /* Look for an oper reason */
  if ((oper_reason = strchr(reason, '|')) != NULL)
    *oper_reason++ = '\0';

  if (!valid_comment(source_p, reason, 1))
    return;

  conf = make_conf_item(DLINE_TYPE);
  aconf = map_to_conf(conf);
  DupString(aconf->host, dlhost);

  if (tkline_time != 0)
  {
    snprintf(buffer, sizeof(buffer), "Temporary D-line %d min. - %s (%s)",
             (int)(tkline_time/60), reason, current_date);
    DupString(aconf->reason, buffer);
    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    apply_tdline(source_p, conf, current_date, tkline_time);
  }
  else
  {
    snprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date);
    DupString(aconf->reason, buffer);
    if (oper_reason != NULL)
      DupString(aconf->oper_reason, oper_reason);
    add_conf_by_address(CONF_DLINE, aconf);
    write_conf_line(source_p, conf, current_date, cur_time);
  }

  rehashed_klines = 1;
}

/* static int remove_tdline_match(const char *host, const char *user)
 * Input: An ip to undline.
 * Output: returns YES on success, NO if no tdline removed.
 * Side effects: Any matching tdlines are removed.
 */
static int
remove_tdline_match(const char *cidr)
{
  struct AccessItem *td_conf;
  dlink_node *td_node;
  struct irc_ssaddr addr, caddr;
  int nm_t, cnm_t, bits, cbits;
  nm_t = parse_netmask(cidr, &addr, &bits);

  DLINK_FOREACH(td_node, temporary_dlines.head)
  {
    td_conf = map_to_conf(td_node->data);
    cnm_t   = parse_netmask(td_conf->host, &caddr, &cbits);

    if (cnm_t != nm_t)
      continue;

    if((nm_t==HM_HOST && !irccmp(td_conf->host, cidr)) ||
       (nm_t==HM_IPV4 && bits==cbits && match_ipv4(&addr, &caddr, bits))
#ifdef IPV6
       || (nm_t==HM_IPV6 && bits==cbits && match_ipv6(&addr, &caddr, bits))
#endif
      )
    {
      dlinkDelete(td_node, &temporary_dlines);
      delete_one_address_conf(td_conf->host, td_conf);
      return 1;
    }
  }

  return 0;
}

/*
** m_undline
** added May 28th 2000 by Toby Verrall <toot@melnet.co.uk>
** based totally on m_unkline
** added to hybrid-7 7/11/2000 --is
**
**      parv[0] = sender nick
**      parv[1] = dline to remove
*/
static void
mo_undline(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  const char *cidr = NULL;

  if (!HasOFlag(source_p, OPER_FLAG_UNKLINE))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "undline");
    return;
  }

  cidr = parv[1];

  if (remove_tdline_match(cidr))
  {
    sendto_one(source_p,
              ":%s NOTICE %s :Un-Dlined [%s] from temporary D-Lines",
              me.name, source_p->name, cidr);
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "%s has removed the temporary D-Line for: [%s]",
                         get_oper_name(source_p), cidr);
    ilog(L_NOTICE, "%s removed temporary D-Line for [%s]", source_p->name, cidr);
    return;
  }

  if (remove_conf_line(DLINE_TYPE, source_p, cidr, NULL) > 0)
  {
    sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed",
               me.name, source_p->name, cidr);
    sendto_realops_flags(UMODE_ALL, L_ALL,
                         "%s has removed the D-Line for: [%s]",
                         get_oper_name(source_p), cidr);
    ilog(L_NOTICE, "%s removed D-Line for [%s]",
         get_oper_name(source_p), cidr);
  }
  else
    sendto_one(source_p, ":%s NOTICE %s :No D-Line for [%s] found",
               me.name, source_p->name, cidr);
}

static struct Message dline_msgtab = {
  "DLINE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, rfc1459_command_send_error, m_ignore, mo_dline, m_ignore}
};

static struct Message undline_msgtab = {
  "UNDLINE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
   {m_unregistered, m_not_oper, rfc1459_command_send_error, m_ignore, mo_undline, m_ignore}
};

static void
module_init(void)
{
  mod_add_cmd(&dline_msgtab);
  mod_add_cmd(&undline_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&dline_msgtab);
  mod_del_cmd(&undline_msgtab);
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1243
Committed:	Fri Sep 30 10:47:53 2011 UTC (14 years, 9 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/m_dline.c*
File size:	9217 byte(s)
Log Message:	- move content of msg.h, ircd_handler.h and handlers.h into parse.h and remove headers accordingly - killed common.h - remove m_killhost.c and m_flags.c from contrib/ - sort out unused header includes here and there
#	User	Rev	Content
1	michael	1058	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_dline.c: Bans a user.
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			* $Id$
23			*/
24
25			#include "stdinc.h"
26			#include "list.h"
27			#include "channel.h"
28			#include "client.h"
29			#include "irc_string.h"
30			#include "sprintf_irc.h"
31			#include "ircd.h"
32			#include "hostmask.h"
33			#include "numeric.h"
34			#include "fdlist.h"
35			#include "s_bsd.h"
36			#include "s_conf.h"
37			#include "s_log.h"
38			#include "s_misc.h"
39			#include "send.h"
40			#include "hash.h"
41			#include "s_serv.h"
42			#include "s_gline.h"
43			#include "parse.h"
44			#include "modules.h"
45
46
47			static int remove_tdline_match(const char *);
48
49			/* apply_tdline()
50			*
51			* inputs -
52			* output - NONE
53			* side effects - tkline as given is placed
54			*/
55			static void
56			apply_tdline(struct Client source_p, struct ConfItem conf,
57			const char *current_date, int tkline_time)
58			{
59			struct AccessItem *aconf;
60
61			aconf = map_to_conf(conf);
62			aconf->hold = CurrentTime + tkline_time;
63
64			add_temp_line(conf);
65			sendto_realops_flags(UMODE_ALL, L_ALL,
66			"%s added temporary %d min. D-Line for [%s] [%s]",
67			get_oper_name(source_p), tkline_time/60,
68			aconf->host, aconf->reason);
69
70			sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line [%s]",
71			MyConnect(source_p) ? me.name : ID_or_name(&me, source_p->from),
72			source_p->name, tkline_time/60, aconf->host);
73			ilog(L_TRACE, "%s added temporary %d min. D-Line for [%s] [%s]",
74			source_p->name, tkline_time/60, aconf->host, aconf->reason);
75			log_oper_action(LOG_TEMP_DLINE_TYPE, source_p, "[%s@%s] [%s]\n",
76			aconf->user, aconf->host, aconf->reason);
77			rehashed_klines = 1;
78			}
79
80			/* mo_dline()
81			*
82			* inputs - pointer to server
83			* - pointer to client
84			* - parameter count
85			* - parameter list
86			* output -
87			* side effects - D line is added
88			*
89			*/
90			static void
91			mo_dline(struct Client client_p, struct Client source_p,
92			int parc, char *parv[])
93			{
94			char def_reason[] = "No reason";
95			char dlhost, oper_reason, *reason;
96			const char *creason;
97			const struct Client *target_p = NULL;
98			struct irc_ssaddr daddr;
99			struct ConfItem *conf=NULL;
100			struct AccessItem *aconf=NULL;
101			time_t tkline_time=0;
102			int bits, t;
103			const char *current_date = NULL;
104			time_t cur_time;
105			char hostip[HOSTIPLEN];
106	michael	1230	char buffer[IRCD_BUFSIZE];
107	michael	1058
108	michael	1219	if (!HasOFlag(source_p, OPER_FLAG_K))
109	michael	1058	{
110			sendto_one(source_p, form_str(ERR_NOPRIVS),
111			me.name, source_p->name, "kline");
112			return;
113			}
114
115			if (parse_aline("DLINE", source_p, parc, parv, AWILD, &dlhost,
116			NULL, &tkline_time, NULL, &reason) < 0)
117			return;
118
119			if ((t = parse_netmask(dlhost, NULL, &bits)) == HM_HOST)
120			{
121			if ((target_p = find_chasing(client_p, source_p, dlhost, NULL)) == NULL)
122			return;
123
124			if (!MyConnect(target_p))
125			{
126			sendto_one(source_p,
127			":%s NOTICE %s :Can't DLINE nick on another server",
128			me.name, source_p->name);
129			return;
130			}
131
132			if (IsExemptKline(target_p))
133			{
134			sendto_one(source_p,
135			":%s NOTICE %s :%s is E-lined", me.name,
136			source_p->name, target_p->name);
137			return;
138			}
139
140	michael	1123	getnameinfo((struct sockaddr *)&target_p->localClient->ip,
141			target_p->localClient->ip.ss_len, hostip,
142			sizeof(hostip), NULL, 0, NI_NUMERICHOST);
143	michael	1058	dlhost = hostip;
144			t = parse_netmask(dlhost, NULL, &bits);
145			assert(t == HM_IPV4 \|\| t == HM_IPV6);
146			}
147
148			if (bits < 8)
149			{
150			sendto_one(source_p,
151			":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.",
152			me.name, source_p->name);
153			return;
154			}
155
156			#ifdef IPV6
157			if (t == HM_IPV6)
158			t = AF_INET6;
159			else
160			#endif
161			t = AF_INET;
162
163			parse_netmask(dlhost, &daddr, NULL);
164
165			if ((aconf = find_dline_conf(&daddr, t)) != NULL)
166			{
167			creason = aconf->reason ? aconf->reason : def_reason;
168			if (IsConfExemptKline(aconf))
169			sendto_one(source_p,
170			":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
171			me.name, source_p->name, dlhost, aconf->host, creason);
172			else
173			sendto_one(source_p,
174			":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
175			me.name, source_p->name, dlhost, aconf->host, creason);
176			return;
177			}
178
179			cur_time = CurrentTime;
180			current_date = smalldate(cur_time);
181
182			/* Look for an oper reason */
183			if ((oper_reason = strchr(reason, '\|')) != NULL)
184			*oper_reason++ = '\0';
185
186	michael	1243	if (!valid_comment(source_p, reason, 1))
187	michael	1058	return;
188
189			conf = make_conf_item(DLINE_TYPE);
190			aconf = map_to_conf(conf);
191			DupString(aconf->host, dlhost);
192
193			if (tkline_time != 0)
194			{
195	michael	1233	snprintf(buffer, sizeof(buffer), "Temporary D-line %d min. - %s (%s)",
196			(int)(tkline_time/60), reason, current_date);
197	michael	1058	DupString(aconf->reason, buffer);
198			if (oper_reason != NULL)
199			DupString(aconf->oper_reason, oper_reason);
200			apply_tdline(source_p, conf, current_date, tkline_time);
201			}
202			else
203			{
204	michael	1233	snprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date);
205	michael	1058	DupString(aconf->reason, buffer);
206			if (oper_reason != NULL)
207			DupString(aconf->oper_reason, oper_reason);
208			add_conf_by_address(CONF_DLINE, aconf);
209			write_conf_line(source_p, conf, current_date, cur_time);
210			}
211
212			rehashed_klines = 1;
213			}
214
215			/* static int remove_tdline_match(const char host, const char user)
216			* Input: An ip to undline.
217			* Output: returns YES on success, NO if no tdline removed.
218			* Side effects: Any matching tdlines are removed.
219			*/
220			static int
221			remove_tdline_match(const char *cidr)
222			{
223			struct AccessItem *td_conf;
224			dlink_node *td_node;
225			struct irc_ssaddr addr, caddr;
226			int nm_t, cnm_t, bits, cbits;
227			nm_t = parse_netmask(cidr, &addr, &bits);
228
229			DLINK_FOREACH(td_node, temporary_dlines.head)
230			{
231			td_conf = map_to_conf(td_node->data);
232			cnm_t = parse_netmask(td_conf->host, &caddr, &cbits);
233
234			if (cnm_t != nm_t)
235			continue;
236
237			if((nm_t==HM_HOST && !irccmp(td_conf->host, cidr)) \|\|
238			(nm_t==HM_IPV4 && bits==cbits && match_ipv4(&addr, &caddr, bits))
239			#ifdef IPV6
240			\|\| (nm_t==HM_IPV6 && bits==cbits && match_ipv6(&addr, &caddr, bits))
241			#endif
242			)
243			{
244			dlinkDelete(td_node, &temporary_dlines);
245			delete_one_address_conf(td_conf->host, td_conf);
246			return 1;
247			}
248			}
249
250			return 0;
251			}
252
253			/*
254			** m_undline
255			** added May 28th 2000 by Toby Verrall <toot@melnet.co.uk>
256			** based totally on m_unkline
257			** added to hybrid-7 7/11/2000 --is
258			**
259			** parv[0] = sender nick
260			** parv[1] = dline to remove
261			*/
262			static void
263			mo_undline(struct Client client_p, struct Client source_p,
264			int parc, char *parv[])
265			{
266			const char *cidr = NULL;
267
268	michael	1219	if (!HasOFlag(source_p, OPER_FLAG_UNKLINE))
269	michael	1058	{
270			sendto_one(source_p, form_str(ERR_NOPRIVS),
271			me.name, source_p->name, "undline");
272			return;
273			}
274
275			cidr = parv[1];
276
277			if (remove_tdline_match(cidr))
278			{
279			sendto_one(source_p,
280			":%s NOTICE %s :Un-Dlined [%s] from temporary D-Lines",
281			me.name, source_p->name, cidr);
282			sendto_realops_flags(UMODE_ALL, L_ALL,
283			"%s has removed the temporary D-Line for: [%s]",
284			get_oper_name(source_p), cidr);
285			ilog(L_NOTICE, "%s removed temporary D-Line for [%s]", source_p->name, cidr);
286			return;
287			}
288
289			if (remove_conf_line(DLINE_TYPE, source_p, cidr, NULL) > 0)
290			{
291			sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed",
292			me.name, source_p->name, cidr);
293			sendto_realops_flags(UMODE_ALL, L_ALL,
294			"%s has removed the D-Line for: [%s]",
295			get_oper_name(source_p), cidr);
296			ilog(L_NOTICE, "%s removed D-Line for [%s]",
297			get_oper_name(source_p), cidr);
298			}
299			else
300			sendto_one(source_p, ":%s NOTICE %s :No D-Line for [%s] found",
301			me.name, source_p->name, cidr);
302			}
303	michael	1230
304			static struct Message dline_msgtab = {
305			"DLINE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
306			{m_unregistered, m_not_oper, rfc1459_command_send_error, m_ignore, mo_dline, m_ignore}
307			};
308
309			static struct Message undline_msgtab = {
310			"UNDLINE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
311			{m_unregistered, m_not_oper, rfc1459_command_send_error, m_ignore, mo_undline, m_ignore}
312			};
313
314			static void
315			module_init(void)
316			{
317			mod_add_cmd(&dline_msgtab);
318			mod_add_cmd(&undline_msgtab);
319			}
320
321			static void
322			module_exit(void)
323			{
324			mod_del_cmd(&dline_msgtab);
325			mod_del_cmd(&undline_msgtab);
326			}
327
328			struct module module_entry = {
329			.node = { NULL, NULL, NULL },
330			.name = NULL,
331			.version = "$Revision$",
332			.handle = NULL,
333			.modinit = module_init,
334			.modexit = module_exit,
335			.flags = 0
336			};