8.2.x/modules/m_links.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2016 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 = NULL;

  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)
  {
    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[])
{
  if (parc > 2)
    if (!ConfigServerHide.disable_remote_commands || HasUMode(source_p, UMODE_OPER))
      if (hunt_server(source_p, ":%s LINKS %s :%s", 1,
                      parc, parv) != HUNTED_ISME)
        return 0;

  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) > CurrentTime)
  {
    sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "LINKS");
    return 0;
  }

  last_used = CurrentTime;

  if (!ConfigServerHide.flatten_links)
    return mo_links(source_p, parc, 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
ms_links(struct Client *source_p, int parc, char *parv[])
{
  if (hunt_server(source_p, ":%s LINKS %s :%s", 1, parc, parv) != HUNTED_ISME)
    return 0;

  return m_links(source_p, parc, parv);
}

static struct Message links_msgtab =
{
  .cmd = "LINKS",
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_links,
  .handlers[SERVER_HANDLER] = ms_links,
  .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:	7329
Committed:	Thu Feb 18 21:07:50 2016 UTC (8 years, 1 month ago) by michael
Content type:	text/x-csrc
File size:	5845 byte(s)
Log Message:	- Now that we got time_t to work nicely on openbsd with snprintf's conversion specifiers, we ran into a similiar issue on Raspbian/ARMv7's time_t which is of signed 32 bit and doesn't cope at all with %j. Instead of doing tricks, get rid of time_t everywhere and forever and use uintmax_t instead which has at least a 'standardized' conversion specifier associated with it.
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2016 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_links.c
23	* \brief Includes required functions for processing the LINKS command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "client.h"
29	#include "irc_string.h"
30	#include "ircd.h"
31	#include "numeric.h"
32	#include "server.h"
33	#include "send.h"
34	#include "conf.h"
35	#include "parse.h"
36	#include "modules.h"
37
38
39	/*! \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	static void
45	do_links(struct Client source_p, int parc, char parv[])
46	{
47	dlink_node *node = NULL;
48
49	sendto_realops_flags(UMODE_SPY, L_ALL, SEND_NOTICE,
50	"LINKS requested by %s (%s@%s) [%s]",
51	source_p->name,
52	source_p->username, source_p->host,
53	source_p->servptr->name);
54
55	if (HasUMode(source_p, UMODE_OPER) \|\| !ConfigServerHide.flatten_links)
56	{
57	const char *mask = (parc > 2 ? parv[2] : parv[1]);
58
59	DLINK_FOREACH(node, global_server_list.head)
60	{
61	const struct Client *target_p = node->data;
62
63	/* skip hidden servers */
64	if (IsHidden(target_p))
65	if (!HasUMode(source_p, UMODE_OPER))
66	continue;
67
68	if (HasFlag(target_p, FLAGS_SERVICE) && ConfigServerHide.hide_services)
69	if (!HasUMode(source_p, UMODE_OPER))
70	continue;
71
72	if (!EmptyString(mask) && match(mask, target_p->name))
73	continue;
74
75	/*
76	* We just send the reply, as if they are here there's either no SHIDE,
77	* or they're an oper..
78	*/
79	sendto_one_numeric(source_p, &me, RPL_LINKS,
80	target_p->name, target_p->servptr->name,
81	target_p->hopcount, target_p->info);
82	}
83
84	sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS,
85	EmptyString(mask) ? "*" : mask);
86	}
87	else
88	{
89	/*
90	* Print our own info so at least it looks like a normal links
91	* then print out the file (which may or may not be empty)
92	*/
93	sendto_one_numeric(source_p, &me, RPL_LINKS, me.name, me.name, 0, me.info);
94
95	DLINK_FOREACH(node, flatten_links.head)
96	sendto_one_numeric(source_p, &me, RPL_LINKS \| SND_EXPLICIT, "%s", node->data);
97	sendto_one_numeric(source_p, &me, RPL_ENDOFLINKS, "*");
98	}
99	}
100
101	static int
102	mo_links(struct Client source_p, int parc, char parv[])
103	{
104	if (parc > 2)
105	if (!ConfigServerHide.disable_remote_commands \|\| HasUMode(source_p, UMODE_OPER))
106	if (hunt_server(source_p, ":%s LINKS %s :%s", 1,
107	parc, parv) != HUNTED_ISME)
108	return 0;
109
110	do_links(source_p, parc, parv);
111	return 0;
112	}
113
114	/*! \brief LINKS command handler
115	*
116	* \param source_p Pointer to allocated Client struct from which the message
117	* originally comes from. This can be a local or remote client.
118	* \param parc Integer holding the number of supplied arguments.
119	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
120	* pointers.
121	* \note Valid arguments for this command are:
122	* - parv[0] = command
123	* - parv[1] = servername mask
124	* or
125	* - parv[0] = command
126	* - parv[1] = server to query
127	* - parv[2] = servername mask
128	*/
129	static int
130	m_links(struct Client source_p, int parc, char parv[])
131	{
132	static uintmax_t last_used = 0;
133
134	if ((last_used + ConfigGeneral.pace_wait) > CurrentTime)
135	{
136	sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "LINKS");
137	return 0;
138	}
139
140	last_used = CurrentTime;
141
142	if (!ConfigServerHide.flatten_links)
143	return mo_links(source_p, parc, parv);
144
145	do_links(source_p, parc, parv);
146	return 0;
147	}
148
149	/*! \brief LINKS command handler
150	*
151	* \param source_p Pointer to allocated Client struct from which the message
152	* originally comes from. This can be a local or remote client.
153	* \param parc Integer holding the number of supplied arguments.
154	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
155	* pointers.
156	* \note Valid arguments for this command are:
157	* - parv[0] = command
158	* - parv[1] = servername mask
159	* or
160	* - parv[0] = command
161	* - parv[1] = server to query
162	* - parv[2] = servername mask
163	*/
164	static int
165	ms_links(struct Client source_p, int parc, char parv[])
166	{
167	if (hunt_server(source_p, ":%s LINKS %s :%s", 1, parc, parv) != HUNTED_ISME)
168	return 0;
169
170	return m_links(source_p, parc, parv);
171	}
172
173	static struct Message links_msgtab =
174	{
175	.cmd = "LINKS",
176	.args_max = MAXPARA,
177	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
178	.handlers[CLIENT_HANDLER] = m_links,
179	.handlers[SERVER_HANDLER] = ms_links,
180	.handlers[ENCAP_HANDLER] = m_ignore,
181	.handlers[OPER_HANDLER] = mo_links
182	};
183
184	static void
185	module_init(void)
186	{
187	mod_add_cmd(&links_msgtab);
188	}
189
190	static void
191	module_exit(void)
192	{
193	mod_del_cmd(&links_msgtab);
194	}
195
196	struct module module_entry =
197	{
198	.version = "$Revision$",
199	.modinit = module_init,
200	.modexit = module_exit,
201	};