trunk/modules/m_links.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2019 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_links.c
 * \brief Includes required functions for processing the LINKS command.
 * \version $Id$
 */

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


/*! \brief Shows a list of linked servers and notifies irc-operators
 *         about the LINKS request
 *
 * \param source_p Pointer to client to report to
 */
static void
do_links(struct Client *source_p, int parc, char *parv[])
{
  dlink_node *node;

  sendto_realops_flags(UMODE_SPY, L_ALL, SEND_NOTICE,
                       "LINKS requested by %s (%s@%s) [%s]",
                       source_p->name,
                       source_p->username, source_p->host,
                       source_p->servptr->name);

  if (HasUMode(source_p, UMODE_OPER) || ConfigServerHide.flatten_links == 0)
  {
    const char *mask = (parc > 2 ? parv[2] : parv[1]);

    DLINK_FOREACH(node, global_server_list.head)
    {
      const struct Client *target_p = node->data;

      /* Skip hidden servers */
      if (IsHidden(target_p))
        if (!HasUMode(source_p, UMODE_OPER))
          continue;

      if (HasFlag(target_p, FLAGS_SERVICE) && ConfigServerHide.hide_services)
        if (!HasUMode(source_p, UMODE_OPER))
          continue;

      if (!EmptyString(mask) && match(mask, target_p->name))
        continue;

      /*
       * We just send the reply, as if they are here there's either no SHIDE,
       * or they're an oper.
       */
      sendto_one_numeric(source_p, &me, RPL_LINKS,
                         target_p->name, target_p->servptr->name,
                         target_p->hopcount, target_p->info);
    }

    sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS,
                       EmptyString(mask) ? "*" : mask);
  }
  else
  {
    /*
     * Print our own info so at least it looks like a normal links, then
     * print out the file (which may or may not be empty).
     */
    sendto_one_numeric(source_p, &me, RPL_LINKS, me.name, me.name, 0, me.info);

    DLINK_FOREACH(node, flatten_links.head)
      sendto_one_numeric(source_p, &me, RPL_LINKS | SND_EXPLICIT, "%s", node->data);
    sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS, "*");
  }
}

static int
mo_links(struct Client *source_p, int parc, char *parv[])
{
  do_links(source_p, parc, parv);
  return 0;
}

/*! \brief LINKS 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] = servername mask
 * or
 *      - parv[0] = command
 *      - parv[1] = server to query
 *      - parv[2] = servername mask
 */
static int
m_links(struct Client *source_p, int parc, char *parv[])
{
  static uintmax_t last_used = 0;

  if ((last_used + ConfigGeneral.pace_wait) > event_base->time.sec_monotonic)
  {
    sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "LINKS");
    return 0;
  }

  last_used = event_base->time.sec_monotonic;

  do_links(source_p, parc, parv);
  return 0;
}

static struct Message links_msgtab =
{
  .cmd = "LINKS",
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_links,
  .handlers[SERVER_HANDLER] = m_ignore,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_links
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	9019
Committed:	Mon May 27 22:05:04 2019 UTC (7 years, 2 months ago) by michael
Content type:	text/x-csrc
File size:	4774 byte(s)
Log Message:	- m_links.c: /links can no longer be used remotely
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	8752	* Copyright (c) 1997-2019 ircd-hybrid development team
5	adx	30	*
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	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2820	/*! \file m_links.c
23			* \brief Includes required functions for processing the LINKS command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28			#include "client.h"
29			#include "irc_string.h"
30			#include "ircd.h"
31			#include "numeric.h"
32	michael	3347	#include "server.h"
33	adx	30	#include "send.h"
34	michael	1309	#include "conf.h"
35	adx	30	#include "parse.h"
36			#include "modules.h"
37
38
39	michael	3344	/*! \brief Shows a list of linked servers and notifies irc-operators
40			* about the LINKS request
41			*
42			* \param source_p Pointer to client to report to
43			*/
44	michael	1144	static void
45			do_links(struct Client source_p, int parc, char parv[])
46	adx	30	{
47	michael	8431	dlink_node *node;
48	michael	2156
49	michael	1618	sendto_realops_flags(UMODE_SPY, L_ALL, SEND_NOTICE,
50	michael	1144	"LINKS requested by %s (%s@%s) [%s]",
51			source_p->name,
52			source_p->username, source_p->host,
53			source_p->servptr->name);
54	adx	30
55	michael	9019	if (HasUMode(source_p, UMODE_OPER) \|\| ConfigServerHide.flatten_links == 0)
56	adx	30	{
57	michael	1045	const char *mask = (parc > 2 ? parv[2] : parv[1]);
58	adx	30
59	michael	4815	DLINK_FOREACH(node, global_server_list.head)
60	adx	30	{
61	michael	6355	const struct Client *target_p = node->data;
62	adx	30
63	michael	8431	/* Skip hidden servers */
64	michael	1490	if (IsHidden(target_p))
65			if (!HasUMode(source_p, UMODE_OPER))
66	michael	1489	continue;
67
68	michael	1851	if (HasFlag(target_p, FLAGS_SERVICE) && ConfigServerHide.hide_services)
69			if (!HasUMode(source_p, UMODE_OPER))
70			continue;
71
72	michael	1652	if (!EmptyString(mask) && match(mask, target_p->name))
73	adx	30	continue;
74	michael	575
75	michael	1544	/*
76			* We just send the reply, as if they are here there's either no SHIDE,
77	michael	8431	* or they're an oper.
78	adx	30	*/
79	michael	3109	sendto_one_numeric(source_p, &me, RPL_LINKS,
80			target_p->name, target_p->servptr->name,
81			target_p->hopcount, target_p->info);
82	adx	30	}
83	michael	3109
84			sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS,
85			EmptyString(mask) ? "*" : mask);
86	adx	30	}
87	michael	1148	else
88			{
89	adx	30	/*
90	michael	8431	* Print our own info so at least it looks like a normal links, then
91			* print out the file (which may or may not be empty).
92	adx	30	*/
93	michael	3573	sendto_one_numeric(source_p, &me, RPL_LINKS, me.name, me.name, 0, me.info);
94	michael	2156
95	michael	4815	DLINK_FOREACH(node, flatten_links.head)
96	michael	5583	sendto_one_numeric(source_p, &me, RPL_LINKS \| SND_EXPLICIT, "%s", node->data);
97	michael	3109	sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS, "*");
98	adx	30	}
99			}
100
101	michael	2820	static int
102	michael	3156	mo_links(struct Client source_p, int parc, char parv[])
103	michael	1230	{
104			do_links(source_p, parc, parv);
105	michael	2820	return 0;
106	michael	1230	}
107
108	michael	3299	/*! \brief LINKS command handler
109			*
110			* \param source_p Pointer to allocated Client struct from which the message
111			* originally comes from. This can be a local or remote client.
112			* \param parc Integer holding the number of supplied arguments.
113			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
114			* pointers.
115			* \note Valid arguments for this command are:
116			* - parv[0] = command
117			* - parv[1] = servername mask
118	adx	30	* or
119	michael	3299	* - parv[0] = command
120			* - parv[1] = server to query
121			* - parv[2] = servername mask
122	adx	30	*/
123	michael	2820	static int
124	michael	3156	m_links(struct Client source_p, int parc, char parv[])
125	adx	30	{
126	michael	7330	static uintmax_t last_used = 0;
127	adx	269
128	michael	8903	if ((last_used + ConfigGeneral.pace_wait) > event_base->time.sec_monotonic)
129	adx	269	{
130	michael	4759	sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "LINKS");
131	michael	2820	return 0;
132	adx	269	}
133
134	michael	8903	last_used = event_base->time.sec_monotonic;
135	michael	1121
136	michael	1144	do_links(source_p, parc, parv);
137	michael	2820	return 0;
138	adx	30	}
139
140	michael	2820	static struct Message links_msgtab =
141			{
142	michael	5881	.cmd = "LINKS",
143			.args_max = MAXPARA,
144			.handlers[UNREGISTERED_HANDLER] = m_unregistered,
145			.handlers[CLIENT_HANDLER] = m_links,
146	michael	9019	.handlers[SERVER_HANDLER] = m_ignore,
147	michael	5881	.handlers[ENCAP_HANDLER] = m_ignore,
148			.handlers[OPER_HANDLER] = mo_links
149	michael	1230	};
150
151			static void
152			module_init(void)
153			{
154			mod_add_cmd(&links_msgtab);
155			}
156
157			static void
158			module_exit(void)
159			{
160			mod_del_cmd(&links_msgtab);
161			}
162
163	michael	2820	struct module module_entry =
164			{
165	michael	1230	.version = "$Revision$",
166			.modinit = module_init,
167			.modexit = module_exit,
168			};