trunk/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 "s_bsd.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_ALL, 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:	5881
Committed:	Sun May 3 16:04:15 2015 UTC (10 years, 3 months ago) by michael
Content type:	text/x-csrc
File size:	8865 byte(s)
Log Message:	- Use C99-style initializers in all struct Message items - Removed MFLG_SLOW - Removed DUMMY_HANDLER
#	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 "s_bsd.h"
33	#include "conf.h"
34	#include "log.h"
35	#include "server.h"
36	#include "send.h"
37	#include "parse.h"
38	#include "hash.h"
39	#include "modules.h"
40
41
42	/*! \brief CONNECT command handler
43	*
44	* \param source_p Pointer to allocated Client struct from which the message
45	* originally comes from. This can be a local or remote client.
46	* \param parc Integer holding the number of supplied arguments.
47	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
48	* pointers.
49	* \note Valid arguments for this command are:
50	* - parv[0] = command
51	* - parv[1] = target server
52	* - parv[2] = port number
53	* - parv[3] = nickname/servername
54	*/
55	static int
56	mo_connect(struct Client source_p, int parc, char parv[])
57	{
58	int port = 0, tmpport = 0;
59	struct MaskItem *conf = NULL;
60	const struct Client *target_p = NULL;
61
62	if (EmptyString(parv[1]))
63	{
64	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
65	return 0;
66	}
67
68	if (parc > 3)
69	{
70	if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
71	{
72	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
73	return 0;
74	}
75
76	if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
77	return 0;
78	}
79	else if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
80	{
81	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
82	return 0;
83	}
84
85	/*
86	* Try to find the name, then host, if both fail notify ops and bail
87	*/
88	if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
89	!(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
90	{
91	sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
92	return 0;
93	}
94
95	if ((target_p = hash_find_server(conf->name)))
96	{
97	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
98	target_p->name, target_p->from->name);
99	return 0;
100	}
101
102	/*
103	* Get port number from user, if given. If not specified,
104	* use the default from configuration structure. If missing
105	* from there, then use the precompiled default.
106	*/
107	tmpport = port = conf->port;
108
109	if (parc > 2 && !EmptyString(parv[2]))
110	{
111	if ((port = atoi(parv[2])) <= 0)
112	{
113	sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
114	return 0;
115	}
116	}
117	else if (port <= 0 && (port = PORTNUM) <= 0)
118	{
119	sendto_one_notice(source_p, &me, ":Connect: missing port number");
120	return 0;
121	}
122
123	if (find_servconn_in_progress(conf->name))
124	{
125	sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
126	"is already in progress.", conf->name);
127	return 0;
128	}
129
130	/*
131	* Notify all operators about remote connect requests
132	*/
133	ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %s",
134	source_p->name, parv[1], parv[2] ? parv[2] : "");
135
136	conf->port = port;
137
138	/*
139	* At this point we should be calling connect_server with a valid
140	* connect{} block and a valid port in the connect{} block
141	*/
142	if (serv_connect(conf, source_p))
143	{
144	if (!ConfigServerHide.hide_server_ips && HasUMode(source_p, UMODE_ADMIN))
145	sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%d",
146	conf->host, conf->name, conf->port);
147	else
148	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
149	conf->name, conf->port);
150	}
151	else
152	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
153	conf->name, conf->port);
154
155	/*
156	* Client is either connecting with all the data it needs or has been
157	* destroyed
158	*/
159	conf->port = tmpport;
160	return 0;
161	}
162
163	/*! \brief CONNECT command handler
164	*
165	* \param source_p Pointer to allocated Client struct from which the message
166	* originally comes from. This can be a local or remote client.
167	* \param parc Integer holding the number of supplied arguments.
168	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
169	* pointers.
170	* \note Valid arguments for this command are:
171	* - parv[0] = command
172	* - parv[1] = target server
173	* - parv[2] = port number
174	* - parv[3] = nickname/servername
175	*/
176	static int
177	ms_connect(struct Client source_p, int parc, char parv[])
178	{
179	int port = 0, tmpport = 0;
180	struct MaskItem *conf = NULL;
181	const struct Client *target_p = NULL;
182
183	if (parc < 4 \|\| EmptyString(parv[3]))
184	{
185	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "CONNECT");
186	return 0;
187	}
188
189	if (hunt_server(source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
190	return 0;
191
192	/*
193	* Try to find the name, then host, if both fail notify ops and bail
194	*/
195	if (!(conf = find_matching_name_conf(CONF_SERVER, parv[1], NULL, NULL, 0)) &&
196	!(conf = find_matching_name_conf(CONF_SERVER, NULL, NULL, parv[1], 0)))
197	{
198	sendto_one_notice(source_p, &me, ":Connect: Host %s not listed in configuration file", parv[1]);
199	return 0;
200	}
201
202	if ((target_p = hash_find_server(conf->name)))
203	{
204	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s.",
205	target_p->name, target_p->from->name);
206	return 0;
207	}
208
209	/*
210	* Get port number from user, if given. If not specified,
211	* use the default from configuration structure. If missing
212	* from there, then use the precompiled default.
213	*/
214	tmpport = port = conf->port;
215
216	if (parc > 2 && !EmptyString(parv[2]))
217	{
218	port = atoi(parv[2]);
219
220	/*
221	* If someone sends port 0, and we have a config port.. use it
222	*/
223	if (port == 0 && conf->port)
224	port = conf->port;
225	else if (port <= 0)
226	{
227	sendto_one_notice(source_p, &me, ":Connect: Illegal port number");
228	return 0;
229	}
230	}
231	else if (port <= 0 && (port = PORTNUM) <= 0)
232	{
233	sendto_one_notice(source_p, &me, ":Connect: missing port number");
234	return 0;
235	}
236
237	if (find_servconn_in_progress(conf->name))
238	{
239	sendto_one_notice(source_p, &me, ":Connect: a connection to %s "
240	"is already in progress.", conf->name);
241	return 0;
242	}
243
244	/*
245	* Notify all operators about remote connect requests
246	*/
247	sendto_realops_flags(UMODE_ALL, L_ALL, SEND_GLOBAL, "from %s: Remote CONNECT %s %d from %s",
248	me.name, parv[1], port, source_p->name);
249	sendto_server(NULL, 0, 0,
250	":%s GLOBOPS :Remote CONNECT %s %d from %s",
251	me.id, parv[1], port, source_p->name);
252
253	ilog(LOG_TYPE_IRCD, "CONNECT From %s : %s %d",
254	source_p->name, parv[1], port);
255
256	conf->port = port;
257
258	/*
259	* At this point we should be calling connect_server with a valid
260	* connect{} block and a valid port in the connect{} block
261	*/
262	if (serv_connect(conf, source_p))
263	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%d",
264	conf->name, conf->port);
265	else
266	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%d",
267	conf->name, conf->port);
268	/*
269	* Client is either connecting with all the data it needs or has been
270	* destroyed
271	*/
272	conf->port = tmpport;
273	return 0;
274	}
275
276	static struct Message connect_msgtab =
277	{
278	.cmd = "CONNECT",
279	.args_min = 2,
280	.args_max = MAXPARA,
281	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
282	.handlers[CLIENT_HANDLER] = m_not_oper,
283	.handlers[SERVER_HANDLER] = ms_connect,
284	.handlers[ENCAP_HANDLER] = m_ignore,
285	.handlers[OPER_HANDLER] = mo_connect
286	};
287
288	static void
289	module_init(void)
290	{
291	mod_add_cmd(&connect_msgtab);
292	}
293
294	static void
295	module_exit(void)
296	{
297	mod_del_cmd(&connect_msgtab);
298	}
299
300	struct module module_entry =
301	{
302	.version = "$Revision$",
303	.modinit = module_init,
304	.modexit = module_exit,
305	};