8.2.x/modules/m_connect.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_connect.c
 * \brief Includes required functions for processing the CONNECT command.
 * \version $Id$
 */

#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "irc_string.h"
#include "numeric.h"
#include "conf.h"
#include "log.h"
#include "server.h"
#include "send.h"
#include "parse.h"
#include "hash.h"
#include "modules.h"


/*! \brief CONNECT 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
 *      - parv[2] = port number
 *      - parv[3] = nickname/servername
 */
static int
mo_connect(struct Client *source_p, int parc, char *parv[])
{
  int port = 0, tmpport = 0;
  struct MaskItem *conf = NULL;
  const struct Client *target_p = NULL;

  if (EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
    return 0;
  }

  if (parc > 3)
  {
    if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
    {
      sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
      return 0;
    }

    if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
      return 0;
  }
  else if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
  {
    sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
    return 0;
  }

  /*
   * Try to find the name, then host, if both fail notify ops and bail
   */
  if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
      !(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
  {
    sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
    return 0;
  }

  if ((target_p = hash_find_server(conf->name)))
  {
    sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
                      target_p->name, target_p->from->name);
    return 0;
  }

  /*
   * Get port number from user, if given. If not specified,
   * use the default from configuration structure. If missing
   * from there, then use the precompiled default.
   */
  tmpport = port = conf->port;

  if (parc > 2 && !EmptyString(parv[2]))
  {
    if ((port = atoi(parv[2])) <= 0)
    {
      sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
      return 0;
    }
  }
  else if (port <= 0 && (port = PORTNUM) <= 0)
  {
    sendto_one_notice(source_p, &me, ":Connect: missing port number");
    return 0;
  }

  if (find_servconn_in_progress(conf->name))
  {
    sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
                      "is already in progress.", conf->name);
    return 0;
  }

  /*
   * Notify all operators about remote connect requests
   */
  ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %s",
       source_p->name, parv[1], parv[2] ? parv[2] : "");

  conf->port = port;

  /*
   * At this point we should be calling connect_server with a valid
   * connect{} block and a valid port in the connect{} block
   */
  if (serv_connect(conf, source_p))
  {
    if (!ConfigServerHide.hide_server_ips && HasUMode(source_p, UMODE_ADMIN))
      sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%d",
                        conf->host, conf->name, conf->port);
    else
      sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
                        conf->name, conf->port);
  }
  else
    sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
                      conf->name, conf->port);

  /*
   * Client is either connecting with all the data it needs or has been
   * destroyed
   */
  conf->port = tmpport;
  return 0;
}

/*! \brief CONNECT 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
 *      - parv[2] = port number
 *      - parv[3] = nickname/servername
 */
static int
ms_connect(struct Client *source_p, int parc, char *parv[])
{
  int port = 0, tmpport = 0;
  struct MaskItem *conf = NULL;
  const struct Client *target_p = NULL;

  if (parc < 4 || EmptyString(parv[3]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
    return 0;
  }

  if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
    return 0;

  /*
   * Try to find the name, then host, if both fail notify ops and bail
   */
  if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
      !(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
  {
    sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
    return 0;
  }

  if ((target_p = hash_find_server(conf->name)))
  {
    sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
                      target_p->name, target_p->from->name);
    return 0;
  }

  /*
   * Get port number from user, if given. If not specified,
   * use the default from configuration structure. If missing
   * from there, then use the precompiled default.
   */
  tmpport = port = conf->port;

  if (parc > 2 && !EmptyString(parv[2]))
  {
    port = atoi(parv[2]);

    /*
     * If someone sends port 0, and we have a config port.. use it
     */
    if (port == 0 && conf->port)
      port = conf->port;
    else if (port <= 0)
    {
      sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
      return 0;
    }
  }
  else if (port <= 0 && (port = PORTNUM) <= 0)
  {
    sendto_one_notice(source_p, &me, ":Connect: missing port number");
    return 0;
  }

  if (find_servconn_in_progress(conf->name))
  {
    sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
                      "is already in progress.", conf->name);
    return 0;
  }

  /*
   * Notify all operators about remote connect requests
   */
  sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_GLOBAL, "from %s: Remote CONNECT %s %d from %s",
                       me.name, parv[1], port, source_p->name);
  sendto_server(NULL, 0, 0,
                ":%s GLOBOPS :Remote CONNECT %s %d from %s",
                me.id, parv[1], port, source_p->name);

  ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %d",
       source_p->name, parv[1], port);

  conf->port = port;

  /*
   * At this point we should be calling connect_server with a valid
   * connect{} block and a valid port in the connect{} block
   */
  if (serv_connect(conf, source_p))
    sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
                      conf->name, conf->port);
  else
    sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
                      conf->name, conf->port);
  /*
   * Client is either connecting with all the data it needs or has been
   * destroyed
   */
  conf->port = tmpport;
  return 0;
}

static struct Message connect_msgtab =
{
  .cmd = "CONNECT",
  .args_min = 2,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_not_oper,
  .handlers[SERVER_HANDLER] = ms_connect,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_connect
};

static void
module_init(void)
{
  mod_add_cmd(&connect_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&connect_msgtab);
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	6364
Committed:	Wed Aug 19 09:59:43 2015 UTC (8 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	8853 byte(s)
Log Message:	- Remove unused header includes
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2015 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_connect.c
23	* \brief Includes required functions for processing the CONNECT command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "client.h"
29	#include "ircd.h"
30	#include "irc_string.h"
31	#include "numeric.h"
32	#include "conf.h"
33	#include "log.h"
34	#include "server.h"
35	#include "send.h"
36	#include "parse.h"
37	#include "hash.h"
38	#include "modules.h"
39
40
41	/*! \brief CONNECT command handler
42	*
43	* \param source_p Pointer to allocated Client struct from which the message
44	* originally comes from. This can be a local or remote client.
45	* \param parc Integer holding the number of supplied arguments.
46	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
47	* pointers.
48	* \note Valid arguments for this command are:
49	* - parv[0] = command
50	* - parv[1] = target server
51	* - parv[2] = port number
52	* - parv[3] = nickname/servername
53	*/
54	static int
55	mo_connect(struct Client source_p, int parc, char parv[])
56	{
57	int port = 0, tmpport = 0;
58	struct MaskItem *conf = NULL;
59	const struct Client *target_p = NULL;
60
61	if (EmptyString(parv[1]))
62	{
63	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
64	return 0;
65	}
66
67	if (parc > 3)
68	{
69	if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
70	{
71	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
72	return 0;
73	}
74
75	if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
76	return 0;
77	}
78	else if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
79	{
80	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
81	return 0;
82	}
83
84	/*
85	* Try to find the name, then host, if both fail notify ops and bail
86	*/
87	if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
88	!(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
89	{
90	sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
91	return 0;
92	}
93
94	if ((target_p = hash_find_server(conf->name)))
95	{
96	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
97	target_p->name, target_p->from->name);
98	return 0;
99	}
100
101	/*
102	* Get port number from user, if given. If not specified,
103	* use the default from configuration structure. If missing
104	* from there, then use the precompiled default.
105	*/
106	tmpport = port = conf->port;
107
108	if (parc > 2 && !EmptyString(parv[2]))
109	{
110	if ((port = atoi(parv[2])) <= 0)
111	{
112	sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
113	return 0;
114	}
115	}
116	else if (port <= 0 && (port = PORTNUM) <= 0)
117	{
118	sendto_one_notice(source_p, &me, ":Connect: missing port number");
119	return 0;
120	}
121
122	if (find_servconn_in_progress(conf->name))
123	{
124	sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
125	"is already in progress.", conf->name);
126	return 0;
127	}
128
129	/*
130	* Notify all operators about remote connect requests
131	*/
132	ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %s",
133	source_p->name, parv[1], parv[2] ? parv[2] : "");
134
135	conf->port = port;
136
137	/*
138	* At this point we should be calling connect_server with a valid
139	* connect{} block and a valid port in the connect{} block
140	*/
141	if (serv_connect(conf, source_p))
142	{
143	if (!ConfigServerHide.hide_server_ips && HasUMode(source_p, UMODE_ADMIN))
144	sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%d",
145	conf->host, conf->name, conf->port);
146	else
147	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
148	conf->name, conf->port);
149	}
150	else
151	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
152	conf->name, conf->port);
153
154	/*
155	* Client is either connecting with all the data it needs or has been
156	* destroyed
157	*/
158	conf->port = tmpport;
159	return 0;
160	}
161
162	/*! \brief CONNECT command handler
163	*
164	* \param source_p Pointer to allocated Client struct from which the message
165	* originally comes from. This can be a local or remote client.
166	* \param parc Integer holding the number of supplied arguments.
167	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
168	* pointers.
169	* \note Valid arguments for this command are:
170	* - parv[0] = command
171	* - parv[1] = target server
172	* - parv[2] = port number
173	* - parv[3] = nickname/servername
174	*/
175	static int
176	ms_connect(struct Client source_p, int parc, char parv[])
177	{
178	int port = 0, tmpport = 0;
179	struct MaskItem *conf = NULL;
180	const struct Client *target_p = NULL;
181
182	if (parc < 4 \|\| EmptyString(parv[3]))
183	{
184	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
185	return 0;
186	}
187
188	if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
189	return 0;
190
191	/*
192	* Try to find the name, then host, if both fail notify ops and bail
193	*/
194	if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
195	!(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
196	{
197	sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
198	return 0;
199	}
200
201	if ((target_p = hash_find_server(conf->name)))
202	{
203	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
204	target_p->name, target_p->from->name);
205	return 0;
206	}
207
208	/*
209	* Get port number from user, if given. If not specified,
210	* use the default from configuration structure. If missing
211	* from there, then use the precompiled default.
212	*/
213	tmpport = port = conf->port;
214
215	if (parc > 2 && !EmptyString(parv[2]))
216	{
217	port = atoi(parv[2]);
218
219	/*
220	* If someone sends port 0, and we have a config port.. use it
221	*/
222	if (port == 0 && conf->port)
223	port = conf->port;
224	else if (port <= 0)
225	{
226	sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
227	return 0;
228	}
229	}
230	else if (port <= 0 && (port = PORTNUM) <= 0)
231	{
232	sendto_one_notice(source_p, &me, ":Connect: missing port number");
233	return 0;
234	}
235
236	if (find_servconn_in_progress(conf->name))
237	{
238	sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
239	"is already in progress.", conf->name);
240	return 0;
241	}
242
243	/*
244	* Notify all operators about remote connect requests
245	*/
246	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_GLOBAL, "from %s: Remote CONNECT %s %d from %s",
247	me.name, parv[1], port, source_p->name);
248	sendto_server(NULL, 0, 0,
249	":%s GLOBOPS :Remote CONNECT %s %d from %s",
250	me.id, parv[1], port, source_p->name);
251
252	ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %d",
253	source_p->name, parv[1], port);
254
255	conf->port = port;
256
257	/*
258	* At this point we should be calling connect_server with a valid
259	* connect{} block and a valid port in the connect{} block
260	*/
261	if (serv_connect(conf, source_p))
262	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
263	conf->name, conf->port);
264	else
265	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
266	conf->name, conf->port);
267	/*
268	* Client is either connecting with all the data it needs or has been
269	* destroyed
270	*/
271	conf->port = tmpport;
272	return 0;
273	}
274
275	static struct Message connect_msgtab =
276	{
277	.cmd = "CONNECT",
278	.args_min = 2,
279	.args_max = MAXPARA,
280	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
281	.handlers[CLIENT_HANDLER] = m_not_oper,
282	.handlers[SERVER_HANDLER] = ms_connect,
283	.handlers[ENCAP_HANDLER] = m_ignore,
284	.handlers[OPER_HANDLER] = mo_connect
285	};
286
287	static void
288	module_init(void)
289	{
290	mod_add_cmd(&connect_msgtab);
291	}
292
293	static void
294	module_exit(void)
295	{
296	mod_del_cmd(&connect_msgtab);
297	}
298
299	struct module module_entry =
300	{
301	.version = "$Revision$",
302	.modinit = module_init,
303	.modexit = module_exit,
304	};