8.2.x/modules/m_connect.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2022 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] = unused/ignored
 *      - parv[3] = nickname/servername
 */
static void
mo_connect(struct Client *source_p, int parc, char *parv[])
{
  const char *const name = parv[1];

  if (!EmptyString(parv[3]))
  {
    if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
    {
      sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
      return;
    }

    if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parv)->ret != HUNTED_ISME)
      return;
  }

  if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
  {
    sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
    return;
  }

  /*
   * Try to find the name. If it fails, notify and bail.
   */
  struct MaskItem *conf = connect_find(name, match);
  if (conf == NULL)
  {
    sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
    return;
  }

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

  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;
  }

  ilog(LOG_TYPE_IRCD, "CONNECT %s %u from %s",
       name, conf->port, get_oper_name(source_p));

  /*
   * At this point we should be calling connect_server with a valid
   * connect{} block and a valid port in the connect{} block
   */
  if (server_connect(conf, source_p) == true)
  {
    if (ConfigServerHide.hide_server_ips == 0 && HasUMode(source_p, UMODE_ADMIN))
      sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%u",
                        conf->name, conf->host, conf->port);
    else
      sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
                        conf->name, conf->port);
  }
  else
    sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
                      conf->name, conf->port);

  /*
   * Client is either connecting with all the data it needs or has been
   * destroyed
   */
}

/*! \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] = unused/ignored
 *      - parv[3] = nickname/servername
 */
static void
ms_connect(struct Client *source_p, int parc, char *parv[])
{
  const char *const name = parv[1];

  if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parv)->ret != HUNTED_ISME)
    return;

  /*
   * Try to find the name. If it fails, notify and bail.
   */
  struct MaskItem *conf = connect_find(name, match);
  if (conf == NULL)
  {
    sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
    return;
  }

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

  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;
  }

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

  ilog(LOG_TYPE_IRCD, "Remote CONNECT %s %u from %s",
       name, conf->port, get_oper_name(source_p));

  /*
   * At this point we should be calling connect_server with a valid
   * connect{} block and a valid port in the connect{} block
   */
  if (server_connect(conf, source_p) == true)
    sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
                      conf->name, conf->port);
  else
    sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
                      conf->name, conf->port);

  /*
   * Client is either connecting with all the data it needs or has been
   * destroyed
   */
}

static struct Message connect_msgtab =
{
  .cmd = "CONNECT",
  .handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
  .handlers[CLIENT_HANDLER] = { .handler = m_not_oper },
  .handlers[SERVER_HANDLER] = { .handler = ms_connect, .args_min = 4 },
  .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
  .handlers[OPER_HANDLER] = { .handler = mo_connect, .args_min = 2 }
};

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:	10180
Committed:	Wed Jul 6 15:40:57 2022 UTC (3 years, 1 month ago) by michael
Content type:	text/x-csrc
File size:	6998 byte(s)
Log Message:	- m_connect.c:mo_connect(): replace test on `parc` with `EmptyString`
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2022 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] = unused/ignored
52	* - parv[3] = nickname/servername
53	*/
54	static void
55	mo_connect(struct Client source_p, int parc, char parv[])
56	{
57	const char *const name = parv[1];
58
59	if (!EmptyString(parv[3]))
60	{
61	if (!HasOFlag(source_p, OPER_FLAG_CONNECT_REMOTE))
62	{
63	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect:remote");
64	return;
65	}
66
67	if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parv)->ret != HUNTED_ISME)
68	return;
69	}
70
71	if (!HasOFlag(source_p, OPER_FLAG_CONNECT))
72	{
73	sendto_one_numeric(source_p, &me, ERR_NOPRIVS, "connect");
74	return;
75	}
76
77	/*
78	* Try to find the name. If it fails, notify and bail.
79	*/
80	struct MaskItem *conf = connect_find(name, match);
81	if (conf == NULL)
82	{
83	sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
84	return;
85	}
86
87	const struct Client *target_p = hash_find_server(conf->name);
88	if (target_p)
89	{
90	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s",
91	target_p->name, target_p->from->name);
92	return;
93	}
94
95	if (find_servconn_in_progress(conf->name))
96	{
97	sendto_one_notice(source_p, &me, ":Connect: a connection to %s is already in progress",
98	conf->name);
99	return;
100	}
101
102	ilog(LOG_TYPE_IRCD, "CONNECT %s %u from %s",
103	name, conf->port, get_oper_name(source_p));
104
105	/*
106	* At this point we should be calling connect_server with a valid
107	* connect{} block and a valid port in the connect{} block
108	*/
109	if (server_connect(conf, source_p) == true)
110	{
111	if (ConfigServerHide.hide_server_ips == 0 && HasUMode(source_p, UMODE_ADMIN))
112	sendto_one_notice(source_p, &me, ":*** Connecting to %s[%s].%u",
113	conf->name, conf->host, conf->port);
114	else
115	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
116	conf->name, conf->port);
117	}
118	else
119	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
120	conf->name, conf->port);
121
122	/*
123	* Client is either connecting with all the data it needs or has been
124	* destroyed
125	*/
126	}
127
128	/*! \brief CONNECT command handler
129	*
130	* \param source_p Pointer to allocated Client struct from which the message
131	* originally comes from. This can be a local or remote client.
132	* \param parc Integer holding the number of supplied arguments.
133	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
134	* pointers.
135	* \note Valid arguments for this command are:
136	* - parv[0] = command
137	* - parv[1] = target server
138	* - parv[2] = unused/ignored
139	* - parv[3] = nickname/servername
140	*/
141	static void
142	ms_connect(struct Client source_p, int parc, char parv[])
143	{
144	const char *const name = parv[1];
145
146	if (server_hunt(source_p, ":%s CONNECT %s %s :%s", 3, parv)->ret != HUNTED_ISME)
147	return;
148
149	/*
150	* Try to find the name. If it fails, notify and bail.
151	*/
152	struct MaskItem *conf = connect_find(name, match);
153	if (conf == NULL)
154	{
155	sendto_one_notice(source_p, &me, ":Connect: Server %s not listed in configuration file", name);
156	return;
157	}
158
159	const struct Client *target_p = hash_find_server(conf->name);
160	if (target_p)
161	{
162	sendto_one_notice(source_p, &me, ":Connect: Server %s already exists from %s",
163	target_p->name, target_p->from->name);
164	return;
165	}
166
167	if (find_servconn_in_progress(conf->name))
168	{
169	sendto_one_notice(source_p, &me, ":Connect: a connection to %s is already in progress",
170	conf->name);
171	return;
172	}
173
174	/*
175	* Notify all operators about remote connect requests
176	*/
177	sendto_realops_flags(UMODE_SERVNOTICE, L_ALL, SEND_GLOBAL, "from %s: Remote CONNECT %s %u from %s",
178	me.name, name, conf->port, get_oper_name(source_p));
179	sendto_server(NULL, 0, 0, ":%s GLOBOPS :Remote CONNECT %s %u from %s",
180	me.id, name, conf->port, get_oper_name(source_p));
181
182	ilog(LOG_TYPE_IRCD, "Remote CONNECT %s %u from %s",
183	name, conf->port, get_oper_name(source_p));
184
185	/*
186	* At this point we should be calling connect_server with a valid
187	* connect{} block and a valid port in the connect{} block
188	*/
189	if (server_connect(conf, source_p) == true)
190	sendto_one_notice(source_p, &me, ":*** Connecting to %s.%u",
191	conf->name, conf->port);
192	else
193	sendto_one_notice(source_p, &me, ":*** Couldn't connect to %s.%u",
194	conf->name, conf->port);
195
196	/*
197	* Client is either connecting with all the data it needs or has been
198	* destroyed
199	*/
200	}
201
202	static struct Message connect_msgtab =
203	{
204	.cmd = "CONNECT",
205	.handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
206	.handlers[CLIENT_HANDLER] = { .handler = m_not_oper },
207	.handlers[SERVER_HANDLER] = { .handler = ms_connect, .args_min = 4 },
208	.handlers[ENCAP_HANDLER] = { .handler = m_ignore },
209	.handlers[OPER_HANDLER] = { .handler = mo_connect, .args_min = 2 }
210	};
211
212	static void
213	module_init(void)
214	{
215	mod_add_cmd(&connect_msgtab);
216	}
217
218	static void
219	module_exit(void)
220	{
221	mod_del_cmd(&connect_msgtab);
222	}
223
224	struct module module_entry =
225	{
226	.version = "$Revision$",
227	.modinit = module_init,
228	.modexit = module_exit,
229	};