trunk/modules/m_svinfo.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_svinfo.c
 * \brief Includes required functions for processing the SVINFO command.
 * \version $Id$
 */

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


/*! \brief SVINFO 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] = TS_CURRENT for the server
 *      - parv[2] = TS_MIN for the server
 *      - parv[3] = unused
 *      - parv[4] = server's idea of UTC time
 */
static int
ms_svinfo(struct Client *source_p, int parc, char *parv[])
{
  intmax_t deltat = 0, theirtime = 0;

  if (!IsServer(source_p) || !MyConnect(source_p))
    return 0;

  if (TS_CURRENT < atoi(parv[2]) || atoi(parv[1]) < TS_MIN)
  {
    /*
     * A server with the wrong TS version connected; since we're
     * TS_ONLY we can't fall back to the non-TS protocol so
     * we drop the link  -orabidoo
     */
    sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
         "Link %s dropped, wrong TS protocol version (%s,%s)",
         get_client_name(source_p, SHOW_IP), parv[1], parv[2]);
    sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
         "Link %s dropped, wrong TS protocol version (%s,%s)",
         get_client_name(source_p, MASK_IP), parv[1], parv[2]);
    ilog(LOG_TYPE_IRCD,
         "Link %s dropped, wrong TS protocol version (%s,%s)",
         get_client_name(source_p, SHOW_IP), parv[1], parv[2]);

    exit_client(source_p, "Incompatible TS version");
    return 0;
  }

  /*
   * Since we're here, might as well set CurrentTime while we're at it
   */
  set_time();

  theirtime = strtoimax(parv[4], NULL, 10);
  deltat = imaxabs(theirtime - CurrentTime);

  if (deltat > ConfigGeneral.ts_max_delta)
  {
    sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
         "Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
         get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);
    sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
         "Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
          get_client_name(source_p, MASK_IP), CurrentTime, theirtime, deltat);
    ilog(LOG_TYPE_IRCD,
         "Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
         get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);

    exit_client(source_p, "Excessive TS delta");
    return 0;
  }

  if (deltat > ConfigGeneral.ts_warn_delta)
  {
    sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
          "Link %s notable TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
          get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);
    sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
          "Link %s notable TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
          get_client_name(source_p, MASK_IP), CurrentTime, theirtime, deltat);
  }

  return 0;
}

static struct Message svinfo_msgtab =
{
  .cmd = "SVINFO",
  .args_min = 5,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_ignore,
  .handlers[SERVER_HANDLER] = ms_svinfo,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = m_ignore
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	7330
Committed:	Fri Feb 19 17:50:13 2016 UTC (10 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	4814 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.
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	7006	* Copyright (c) 1997-2016 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	michael	1230
22	michael	2820	/*! \file m_svinfo.c
23			* \brief Includes required functions for processing the SVINFO 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 "send.h"
32	michael	1309	#include "conf.h"
33			#include "log.h"
34	adx	30	#include "parse.h"
35			#include "modules.h"
36
37
38	michael	3294	/*! \brief SVINFO command handler
39			*
40			* \param source_p Pointer to allocated Client struct from which the message
41			* originally comes from. This can be a local or remote client.
42			* \param parc Integer holding the number of supplied arguments.
43			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
44			* pointers.
45			* \note Valid arguments for this command are:
46			* - parv[0] = command
47			* - parv[1] = TS_CURRENT for the server
48			* - parv[2] = TS_MIN for the server
49	michael	6873	* - parv[3] = unused
50	michael	3294	* - parv[4] = server's idea of UTC time
51	adx	30	*/
52	michael	2820	static int
53	michael	3156	ms_svinfo(struct Client source_p, int parc, char parv[])
54	adx	30	{
55	michael	6782	intmax_t deltat = 0, theirtime = 0;
56	adx	30
57	michael	3172	if (!IsServer(source_p) \|\| !MyConnect(source_p))
58	michael	2820	return 0;
59	adx	30
60			if (TS_CURRENT < atoi(parv[2]) \|\| atoi(parv[1]) < TS_MIN)
61	michael	1298	{
62			/*
63	michael	3294	* A server with the wrong TS version connected; since we're
64	michael	1298	* TS_ONLY we can't fall back to the non-TS protocol so
65			* we drop the link -orabidoo
66			*/
67	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
68	michael	6864	"Link %s dropped, wrong TS protocol version (%s,%s)",
69			get_client_name(source_p, SHOW_IP), parv[1], parv[2]);
70	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
71	michael	6864	"Link %s dropped, wrong TS protocol version (%s,%s)",
72			get_client_name(source_p, MASK_IP), parv[1], parv[2]);
73			ilog(LOG_TYPE_IRCD,
74			"Link %s dropped, wrong TS protocol version (%s,%s)",
75			get_client_name(source_p, SHOW_IP), parv[1], parv[2]);
76	michael	6796
77	michael	3171	exit_client(source_p, "Incompatible TS version");
78	michael	2820	return 0;
79	michael	1298	}
80	adx	30
81			/*
82	michael	3294	* Since we're here, might as well set CurrentTime while we're at it
83	adx	30	*/
84	michael	2820	set_time();
85	michael	3294
86	michael	6782	theirtime = strtoimax(parv[4], NULL, 10);
87			deltat = imaxabs(theirtime - CurrentTime);
88	adx	30
89	michael	4340	if (deltat > ConfigGeneral.ts_max_delta)
90	michael	1298	{
91	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
92	michael	7330	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
93	michael	6874	get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);
94	michael	6318	sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
95	michael	7330	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
96	michael	6874	get_client_name(source_p, MASK_IP), CurrentTime, theirtime, deltat);
97	michael	1298	ilog(LOG_TYPE_IRCD,
98	michael	7330	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
99	michael	6796	get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);
100
101	michael	3171	exit_client(source_p, "Excessive TS delta");
102	michael	2820	return 0;
103	michael	1298	}
104	adx	30
105	michael	4340	if (deltat > ConfigGeneral.ts_warn_delta)
106	michael	6860	{
107			sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
108	michael	7330	"Link %s notable TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
109	michael	6860	get_client_name(source_p, SHOW_IP), CurrentTime, theirtime, deltat);
110			sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
111	michael	7330	"Link %s notable TS delta (my TS=%ju, their TS=%ji, delta=%ji)",
112	michael	6860	get_client_name(source_p, MASK_IP), CurrentTime, theirtime, deltat);
113			}
114
115	michael	2820	return 0;
116	adx	30	}
117	michael	1230
118	michael	2820	static struct Message svinfo_msgtab =
119			{
120	michael	5881	.cmd = "SVINFO",
121			.args_min = 5,
122			.args_max = MAXPARA,
123			.handlers[UNREGISTERED_HANDLER] = m_unregistered,
124			.handlers[CLIENT_HANDLER] = m_ignore,
125			.handlers[SERVER_HANDLER] = ms_svinfo,
126			.handlers[ENCAP_HANDLER] = m_ignore,
127			.handlers[OPER_HANDLER] = m_ignore
128	michael	1230	};
129
130			static void
131			module_init(void)
132			{
133			mod_add_cmd(&svinfo_msgtab);
134			}
135
136			static void
137			module_exit(void)
138			{
139			mod_del_cmd(&svinfo_msgtab);
140			}
141
142	michael	2820	struct module module_entry =
143			{
144	michael	1230	.version = "$Revision$",
145			.modinit = module_init,
146			.modexit = module_exit,
147			};