ircd-hybrid/modules/m_connect.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_connect.c: Connects to a remote IRC server.
 *
 *  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 "handlers.h"
#include "client.h"
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "hash.h"
#include "modules.h"

static void mo_connect(struct Client *, struct Client *, int, char *[]);
static void ms_connect(struct Client *, struct Client *, int, char *[]);

struct Message connect_msgtab = {
  "CONNECT", 0, 0, 2, 0, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, ms_connect, m_ignore, mo_connect, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&connect_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&connect_msgtab);
}

const char *_version = "$Revision$";
#endif

/*! \brief CONNECT command handler (called for operators only)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \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] = sender prefix
 *      - parv[1] = servername
 *      - parv[2] = port number
 *      - parv[3] = remote server
 */
static void
mo_connect(struct Client* client_p, struct Client* source_p,
           int parc, char* parv[])
{
  int port;
  int tmpport;
  struct ConfItem *conf = NULL;
  struct AccessItem *aconf = NULL;
  struct Client *target_p;

  /* always privileged with handlers */
  if (MyConnect(source_p) && !IsOperRemote(source_p) && parc > 3)
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, source_p->name, "connect");
    return;
  }

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

  if (*parv[1] == '\0')
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "CONNECT");
    return;
  }

  if ((target_p = find_server(parv[1])))
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Connect: Server %s already exists from %s.",
               me.name, source_p->name, parv[1], target_p->from->name);
    return;
  }

  /*
   * try to find the name, then host, if both fail notify ops and bail
   */
  if ((conf = find_matching_name_conf(SERVER_TYPE,
                                      parv[1], NULL, NULL, 0)) != NULL)
    aconf = &conf->conf.AccessItem;
  else if ((conf = find_matching_name_conf(SERVER_TYPE,
                                           NULL, NULL, parv[1], 0)) != NULL)
    aconf = &conf->conf.AccessItem;
  
  if (conf == NULL)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
               me.name, source_p->name, parv[1]);
    return;
  }
    
  /* Get port number from user, if given. If not specified,
   * use the default form configuration structure. If missing
   * from there, then use the precompiled default.
   */
  tmpport = port = aconf->port;

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

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

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

  aconf->port = port;

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

  /*
   * client is either connecting with all the data it needs or has been
   * destroyed
   */
  aconf->port = tmpport;
}

/*! \brief CONNECT command handler (called for remote clients only)
 *
 * \param client_p Pointer to allocated Client struct with physical connection
 *                 to this server, i.e. with an open socket connected.
 * \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] = sender prefix
 *      - parv[1] = servername
 *      - parv[2] = port number
 *      - parv[3] = remote server
 */
static void
ms_connect(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  int port;
  int tmpport;
  struct ConfItem *conf = NULL;
  struct AccessItem *aconf = NULL;
  struct Client *target_p;

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

  if (*parv[1] == '\0')
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "CONNECT");
    return;
  }

  if ((target_p = find_server(parv[1])))
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Connect: Server %s already exists from %s.",
               me.name, source_p->name, parv[1], target_p->from->name);
    return;
  }

  /*
   * try to find the name, then host, if both fail notify ops and bail
   */
  if ((conf = find_matching_name_conf(SERVER_TYPE,
                                      parv[1], NULL, NULL, 0)) != NULL)
    aconf = &conf->conf.AccessItem;
  else if ((conf = find_matching_name_conf(SERVER_TYPE,
                                           NULL, NULL, parv[1], 0)) != NULL)
    aconf = &conf->conf.AccessItem;

  if (aconf == NULL)
  {
    sendto_one(source_p,
               ":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
               me.name, source_p->name, parv[1]);
    return;
  }

  assert(aconf != NULL);

  /* Get port number from user, if given. If not specified,
   * use the default form configuration structure. If missing
   * from there, then use the precompiled default.
   */
  tmpport = port = aconf->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 && aconf->port)
      port = aconf->port;
    else if (port <= 0)
    {
      sendto_one(source_p, ":%s NOTICE %s :Connect: Illegal port number",
                 me.name, source_p->name);
      return;
    }
  }
  else if (port <= 0 && (port = PORTNUM) <= 0)
  {
    sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
               me.name, source_p->name);
    return;
  }

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

  /*
   * Notify all operators about remote connect requests
   */
  sendto_wallops_flags(UMODE_WALLOP, &me, "Remote CONNECT %s %d from %s",
                       parv[1], port, source_p->name);
  sendto_server(NULL, NULL, NULL, NOCAPS, NOCAPS, NOFLAGS,
                ":%s WALLOPS :Remote CONNECT %s %d from %s",
                me.name, parv[1], port, source_p->name);

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

  aconf->port = port;

  /* at this point we should be calling connect_server with a valid
   * C:line and a valid port in the C:line
   */
  if (serv_connect(aconf, source_p))
    sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
               me.name, source_p->name, conf->name, aconf->port);
  else
    sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
               me.name, source_p->name, conf->name, aconf->port);

  /*
   * client is either connecting with all the data it needs or has been
   * destroyed
   */
  aconf->port = tmpport;
}
Revision:	348
Committed:	Sat Dec 31 14:08:37 2005 UTC (20 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	9787 byte(s)
Log Message:	- More documentation
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_connect.c: Connects to a remote IRC server.
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	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "handlers.h"
27			#include "client.h"
28			#include "ircd.h"
29			#include "numeric.h"
30			#include "s_conf.h"
31			#include "s_serv.h"
32			#include "send.h"
33			#include "msg.h"
34			#include "parse.h"
35			#include "hash.h"
36			#include "modules.h"
37
38	michael	348	static void mo_connect(struct Client , struct Client , int, char *[]);
39			static void ms_connect(struct Client , struct Client , int, char *[]);
40	adx	30
41			struct Message connect_msgtab = {
42			"CONNECT", 0, 0, 2, 0, MFLG_SLOW, 0,
43	michael	348	{ m_unregistered, m_not_oper, ms_connect, m_ignore, mo_connect, m_ignore }
44	adx	30	};
45
46			#ifndef STATIC_MODULES
47			void
48			_modinit(void)
49			{
50			mod_add_cmd(&connect_msgtab);
51			}
52
53			void
54			_moddeinit(void)
55			{
56			mod_del_cmd(&connect_msgtab);
57			}
58
59	knight	31	const char *_version = "$Revision$";
60	adx	30	#endif
61
62	michael	348	/*! \brief CONNECT command handler (called for operators only)
63	adx	30	*
64	michael	348	* \param client_p Pointer to allocated Client struct with physical connection
65			* to this server, i.e. with an open socket connected.
66			* \param source_p Pointer to allocated Client struct from which the message
67			* originally comes from. This can be a local or remote client.
68			* \param parc Integer holding the number of supplied arguments.
69			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
70			* pointers.
71			* \note Valid arguments for this command are:
72			* - parv[0] = sender prefix
73			* - parv[1] = servername
74			* - parv[2] = port number
75			* - parv[3] = remote server
76	adx	30	*/
77			static void
78			mo_connect(struct Client* client_p, struct Client* source_p,
79			int parc, char* parv[])
80			{
81			int port;
82			int tmpport;
83			struct ConfItem *conf = NULL;
84			struct AccessItem *aconf = NULL;
85			struct Client *target_p;
86
87			/* always privileged with handlers */
88			if (MyConnect(source_p) && !IsOperRemote(source_p) && parc > 3)
89			{
90			sendto_one(source_p, form_str(ERR_NOPRIVS),
91			me.name, source_p->name, "connect");
92			return;
93			}
94
95	michael	348	if (hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3,
96			parc, parv) != HUNTED_ISME)
97	adx	30	return;
98
99			if (*parv[1] == '\0')
100			{
101			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
102			me.name, source_p->name, "CONNECT");
103			return;
104			}
105
106			if ((target_p = find_server(parv[1])))
107			{
108			sendto_one(source_p,
109			":%s NOTICE %s :Connect: Server %s already exists from %s.",
110			me.name, source_p->name, parv[1], target_p->from->name);
111			return;
112			}
113
114			/*
115			* try to find the name, then host, if both fail notify ops and bail
116			*/
117			if ((conf = find_matching_name_conf(SERVER_TYPE,
118			parv[1], NULL, NULL, 0)) != NULL)
119	db	139	aconf = &conf->conf.AccessItem;
120	adx	30	else if ((conf = find_matching_name_conf(SERVER_TYPE,
121			NULL, NULL, parv[1], 0)) != NULL)
122	db	139	aconf = &conf->conf.AccessItem;
123	adx	30
124			if (conf == NULL)
125			{
126			sendto_one(source_p,
127			":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
128			me.name, source_p->name, parv[1]);
129			return;
130			}
131
132			/* Get port number from user, if given. If not specified,
133			* use the default form configuration structure. If missing
134			* from there, then use the precompiled default.
135			*/
136			tmpport = port = aconf->port;
137
138			if (parc > 2 && !EmptyString(parv[2]))
139			{
140			if ((port = atoi(parv[2])) <= 0)
141			{
142			sendto_one(source_p, ":%s NOTICE %s :Connect: Illegal port number",
143			me.name, source_p->name);
144			return;
145			}
146			}
147			else if (port <= 0 && (port = PORTNUM) <= 0)
148			{
149			sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
150			me.name, source_p->name);
151			return;
152			}
153
154			if (find_servconn_in_progress(conf->name))
155			{
156			sendto_one(source_p, ":%s NOTICE %s :Connect: a connection to %s "
157			"is already in progress.", me.name, source_p->name, conf->name);
158			return;
159			}
160
161			/*
162			* Notify all operators about remote connect requests
163			*/
164			ilog(L_TRACE, "CONNECT From %s : %s %s",
165			source_p->name, parv[1], parv[2] ? parv[2] : "");
166
167			aconf->port = port;
168
169			/* at this point we should be calling connect_server with a valid
170			* C:line and a valid port in the C:line
171			*/
172			if (serv_connect(aconf, source_p))
173			{
174			if (!ConfigServerHide.hide_server_ips && IsAdmin(source_p))
175			sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s[%s].%d",
176			me.name, source_p->name, aconf->host,
177			conf->name, aconf->port);
178			else
179			sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
180			me.name, source_p->name, conf->name, aconf->port);
181			}
182			else
183			{
184			sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
185			me.name, source_p->name, conf->name, aconf->port);
186			}
187
188	michael	348	/*
189			* client is either connecting with all the data it needs or has been
190	adx	30	* destroyed
191			*/
192			aconf->port = tmpport;
193			}
194
195	michael	348	/*! \brief CONNECT command handler (called for remote clients only)
196	adx	30	*
197	michael	348	* \param client_p Pointer to allocated Client struct with physical connection
198			* to this server, i.e. with an open socket connected.
199			* \param source_p Pointer to allocated Client struct from which the message
200			* originally comes from. This can be a local or remote client.
201			* \param parc Integer holding the number of supplied arguments.
202			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
203			* pointers.
204			* \note Valid arguments for this command are:
205			* - parv[0] = sender prefix
206			* - parv[1] = servername
207			* - parv[2] = port number
208			* - parv[3] = remote server
209	adx	30	*/
210			static void
211			ms_connect(struct Client client_p, struct Client source_p,
212			int parc, char *parv[])
213			{
214			int port;
215			int tmpport;
216			struct ConfItem *conf = NULL;
217			struct AccessItem *aconf = NULL;
218			struct Client *target_p;
219
220	michael	348	if (hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3,
221			parc, parv) != HUNTED_ISME)
222	adx	30	return;
223
224			if (*parv[1] == '\0')
225			{
226			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
227			me.name, source_p->name, "CONNECT");
228			return;
229			}
230
231			if ((target_p = find_server(parv[1])))
232			{
233			sendto_one(source_p,
234			":%s NOTICE %s :Connect: Server %s already exists from %s.",
235			me.name, source_p->name, parv[1], target_p->from->name);
236			return;
237			}
238
239			/*
240			* try to find the name, then host, if both fail notify ops and bail
241			*/
242			if ((conf = find_matching_name_conf(SERVER_TYPE,
243			parv[1], NULL, NULL, 0)) != NULL)
244	db	139	aconf = &conf->conf.AccessItem;
245	adx	30	else if ((conf = find_matching_name_conf(SERVER_TYPE,
246			NULL, NULL, parv[1], 0)) != NULL)
247	db	139	aconf = &conf->conf.AccessItem;
248	adx	30
249			if (aconf == NULL)
250			{
251			sendto_one(source_p,
252			":%s NOTICE %s :Connect: Host %s not listed in ircd.conf",
253			me.name, source_p->name, parv[1]);
254			return;
255			}
256
257			assert(aconf != NULL);
258
259			/* Get port number from user, if given. If not specified,
260			* use the default form configuration structure. If missing
261			* from there, then use the precompiled default.
262			*/
263			tmpport = port = aconf->port;
264
265			if (parc > 2 && !EmptyString(parv[2]))
266			{
267			port = atoi(parv[2]);
268
269			/* if someone sends port 0, and we have a config port.. use it */
270			if (port == 0 && aconf->port)
271			port = aconf->port;
272			else if (port <= 0)
273			{
274			sendto_one(source_p, ":%s NOTICE %s :Connect: Illegal port number",
275			me.name, source_p->name);
276			return;
277			}
278			}
279			else if (port <= 0 && (port = PORTNUM) <= 0)
280			{
281			sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
282			me.name, source_p->name);
283			return;
284			}
285
286			if (find_servconn_in_progress(conf->name))
287			{
288			sendto_one(source_p, ":%s NOTICE %s :Connect: a connection to %s "
289			"is already in progress.", me.name, source_p->name, conf->name);
290			return;
291			}
292
293			/*
294			* Notify all operators about remote connect requests
295			*/
296			sendto_wallops_flags(UMODE_WALLOP, &me, "Remote CONNECT %s %d from %s",
297			parv[1], port, source_p->name);
298			sendto_server(NULL, NULL, NULL, NOCAPS, NOCAPS, NOFLAGS,
299			":%s WALLOPS :Remote CONNECT %s %d from %s",
300			me.name, parv[1], port, source_p->name);
301
302			ilog(L_TRACE, "CONNECT From %s : %s %d",
303			source_p->name, parv[1], port);
304
305			aconf->port = port;
306
307			/* at this point we should be calling connect_server with a valid
308			* C:line and a valid port in the C:line
309			*/
310			if (serv_connect(aconf, source_p))
311			sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
312			me.name, source_p->name, conf->name, aconf->port);
313			else
314			sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
315			me.name, source_p->name, conf->name, aconf->port);
316	michael	348
317			/*
318			* client is either connecting with all the data it needs or has been
319	adx	30	* destroyed
320			*/
321			aconf->port = tmpport;
322			}