8.2.x/modules/m_undline.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_undline.c
 * \brief Includes required functions for processing the UNDLINE 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 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
dline_remove(const char *host)
{
  struct irc_ssaddr iphost, *piphost;
  struct MaskItem *conf;
  int t = 0;
  int aftype = 0;

  if ((t = parse_netmask(host, &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(host, piphost, CONF_DLINE, aftype, NULL, NULL, 0)))
  {
    if (IsConfDatabase(conf))
    {
      delete_one_address_conf(host, conf);
      return 1;
    }
  }

  return 0;
}

static void
dline_remove_and_notify(struct Client *source_p, const char *host)
{
  if (dline_remove(host))
  {
    if (IsClient(source_p))
      sendto_one_notice(source_p, &me, ":D-Line for [%s] is removed", host);

    sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
                         "%s has removed the D-Line for: [%s]",
                         get_oper_name(source_p), host);
    ilog(LOG_TYPE_DLINE, "%s removed D-Line for [%s]",
         get_oper_name(source_p), host);
  }
  else if (IsClient(source_p))
    sendto_one_notice(source_p, &me, ":No D-Line for [%s] found", host);
}

/*! \brief UNDLINE 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] = IP address
 *      - parv[2] = "ON"
 *      - parv[3] = target server
 */
static int
mo_undline(struct Client *source_p, int parc, char *parv[])
{
  char *addr = NULL;
  char *target_server = NULL;

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

  if (parc < 2 || EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "UNDLINE");
    return 0;
  }

  if (!parse_aline("UNDLINE", source_p, parc, parv, 0, &addr,
                   NULL, NULL, &target_server, NULL))
    return 0;

  if (target_server)
  {
    sendto_match_servs(source_p, target_server, CAPAB_UNDLN,
                       "UNDLINE %s %s", target_server, addr);

    /* Allow ON to apply local undline as well if it matches */
    if (match(target_server, me.name))
      return 0;
  }
  else
    cluster_distribute(source_p, "UNDLINE", CAPAB_UNDLN, CLUSTER_UNDLINE, "%s", addr);

  dline_remove_and_notify(source_p, addr);
  return 0;
}

/*! \brief UNDLINE 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] = IP address
 */
static int
ms_undline(struct Client *source_p, int parc, char *parv[])
{
  const char *addr = parv[2];

  if (parc != 3 || EmptyString(parv[2]))
    return 0;

  sendto_match_servs(source_p, parv[1], CAPAB_UNDLN, "UNDLINE %s %s",
                     parv[1], parv[2]);

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

  if (HasFlag(source_p, FLAGS_SERVICE) ||
      shared_find(SHARED_UNDLINE, source_p->servptr->name,
                  source_p->username, source_p->host))
    dline_remove_and_notify(source_p, addr);

  return 0;
}

static struct Message undline_msgtab =
{
  .cmd = "UNDLINE",
  .args_min = 2,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_not_oper,
  .handlers[SERVER_HANDLER] = ms_undline,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_undline
};

static void
module_init(void)
{
  mod_add_cmd(&undline_msgtab);
  add_capability("UNDLN", CAPAB_UNDLN);
}

static void
module_exit(void)
{
  mod_del_cmd(&undline_msgtab);
  delete_capability("UNDLN");
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	7208
Committed:	Wed Feb 3 15:06:47 2016 UTC (9 years, 6 months ago) by michael
Content type:	text/x-csrc
File size:	5892 byte(s)
Log Message:	- Clustering has been broken in -r7158. Rewrote most of the shared/cluster implementation to be less obscure. This introduces a little bit of code duplication, but increases readability, is less error prone, and reduces memory consumption a bit.
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2016 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_undline.c
23	* \brief Includes required functions for processing the UNDLINE 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 "conf.h"
32	#include "conf_cluster.h"
33	#include "conf_shared.h"
34	#include "ircd.h"
35	#include "hostmask.h"
36	#include "numeric.h"
37	#include "log.h"
38	#include "misc.h"
39	#include "send.h"
40	#include "server.h"
41	#include "parse.h"
42	#include "modules.h"
43	#include "memory.h"
44
45
46	/* static int remove_tdline_match(const char host, const char user)
47	* Input: An ip to undline.
48	* Output: returns YES on success, NO if no tdline removed.
49	* Side effects: Any matching tdlines are removed.
50	*/
51	static int
52	dline_remove(const char *host)
53	{
54	struct irc_ssaddr iphost, *piphost;
55	struct MaskItem *conf;
56	int t = 0;
57	int aftype = 0;
58
59	if ((t = parse_netmask(host, &iphost, NULL)) != HM_HOST)
60	{
61	if (t == HM_IPV6)
62	aftype = AF_INET6;
63	else
64	aftype = AF_INET;
65
66	piphost = &iphost;
67	}
68	else
69	piphost = NULL;
70
71	if ((conf = find_conf_by_address(host, piphost, CONF_DLINE, aftype, NULL, NULL, 0)))
72	{
73	if (IsConfDatabase(conf))
74	{
75	delete_one_address_conf(host, conf);
76	return 1;
77	}
78	}
79
80	return 0;
81	}
82
83	static void
84	dline_remove_and_notify(struct Client source_p, const char host)
85	{
86	if (dline_remove(host))
87	{
88	if (IsClient(source_p))
89	sendto_one_notice(source_p, &me, ":D-Line for [%s] is removed", host);
90
91	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_NOTICE,
92	"%s has removed the D-Line for: [%s]",
93	get_oper_name(source_p), host);
94	ilog(LOG_TYPE_DLINE, "%s removed D-Line for [%s]",
95	get_oper_name(source_p), host);
96	}
97	else if (IsClient(source_p))
98	sendto_one_notice(source_p, &me, ":No D-Line for [%s] found", host);
99	}
100
101	/*! \brief UNDLINE command handler
102	*
103	* \param source_p Pointer to allocated Client struct from which the message
104	* originally comes from. This can be a local or remote client.
105	* \param parc Integer holding the number of supplied arguments.
106	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
107	* pointers.
108	* \note Valid arguments for this command are:
109	* - parv[0] = command
110	* - parv[1] = IP address
111	* - parv[2] = "ON"
112	* - parv[3] = target server
113	*/
114	static int
115	mo_undline(struct Client source_p, int parc, char parv[])
116	{
117	char *addr = NULL;
118	char *target_server = NULL;
119
120	if (!HasOFlag(source_p, OPER_FLAG_UNDLINE))
121	{
122	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "undline");
123	return 0;
124	}
125
126	if (parc < 2 \|\| EmptyString(parv[1]))
127	{
128	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "UNDLINE");
129	return 0;
130	}
131
132	if (!parse_aline("UNDLINE", source_p, parc, parv, 0, &addr,
133	NULL, NULL, &target_server, NULL))
134	return 0;
135
136	if (target_server)
137	{
138	sendto_match_servs(source_p, target_server, CAPAB_UNDLN,
139	"UNDLINE %s %s", target_server, addr);
140
141	/* Allow ON to apply local undline as well if it matches */
142	if (match(target_server, me.name))
143	return 0;
144	}
145	else
146	cluster_distribute(source_p, "UNDLINE", CAPAB_UNDLN, CLUSTER_UNDLINE, "%s", addr);
147
148	dline_remove_and_notify(source_p, addr);
149	return 0;
150	}
151
152	/*! \brief UNDLINE command handler
153	*
154	* \param source_p Pointer to allocated Client struct from which the message
155	* originally comes from. This can be a local or remote client.
156	* \param parc Integer holding the number of supplied arguments.
157	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
158	* pointers.
159	* \note Valid arguments for this command are:
160	* - parv[0] = command
161	* - parv[1] = target server mask
162	* - parv[2] = IP address
163	*/
164	static int
165	ms_undline(struct Client source_p, int parc, char parv[])
166	{
167	const char *addr = parv[2];
168
169	if (parc != 3 \|\| EmptyString(parv[2]))
170	return 0;
171
172	sendto_match_servs(source_p, parv[1], CAPAB_UNDLN, "UNDLINE %s %s",
173	parv[1], parv[2]);
174
175	if (match(parv[1], me.name))
176	return 0;
177
178	if (HasFlag(source_p, FLAGS_SERVICE) \|\|
179	shared_find(SHARED_UNDLINE, source_p->servptr->name,
180	source_p->username, source_p->host))
181	dline_remove_and_notify(source_p, addr);
182
183	return 0;
184	}
185
186	static struct Message undline_msgtab =
187	{
188	.cmd = "UNDLINE",
189	.args_min = 2,
190	.args_max = MAXPARA,
191	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
192	.handlers[CLIENT_HANDLER] = m_not_oper,
193	.handlers[SERVER_HANDLER] = ms_undline,
194	.handlers[ENCAP_HANDLER] = m_ignore,
195	.handlers[OPER_HANDLER] = mo_undline
196	};
197
198	static void
199	module_init(void)
200	{
201	mod_add_cmd(&undline_msgtab);
202	add_capability("UNDLN", CAPAB_UNDLN);
203	}
204
205	static void
206	module_exit(void)
207	{
208	mod_del_cmd(&undline_msgtab);
209	delete_capability("UNDLN");
210	}
211
212	struct module module_entry =
213	{
214	.version = "$Revision$",
215	.modinit = module_init,
216	.modexit = module_exit,
217	};