8.2.x/modules/m_svinfo.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_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[])
{
  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)",
         client_get_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)",
         client_get_name(source_p, MASK_IP), parv[1], parv[2]);
    ilog(LOG_TYPE_IRCD,
         "Link %s dropped, wrong TS protocol version (%s,%s)",
         client_get_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 event_base->time.sec_real while we're at it
   */
  event_time_set();

  uintmax_t theirtime = strtoumax(parv[4], NULL, 10);
  intmax_t deltat = imaxabs(theirtime - event_base->time.sec_real);

  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=%ju, delta=%ji)",
         client_get_name(source_p, SHOW_IP), event_base->time.sec_real, theirtime, deltat);
    sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
         "Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
         client_get_name(source_p, MASK_IP), event_base->time.sec_real, theirtime, deltat);
    ilog(LOG_TYPE_IRCD,
         "Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
         client_get_name(source_p, SHOW_IP), event_base->time.sec_real, 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=%ju, delta=%ji)",
          client_get_name(source_p, SHOW_IP), event_base->time.sec_real, theirtime, deltat);
    sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
          "Link %s notable TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
          client_get_name(source_p, MASK_IP), event_base->time.sec_real, 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:	8976
Committed:	Sat May 18 18:44:09 2019 UTC (6 years, 3 months ago) by michael
Content type:	text/x-csrc
File size:	4897 byte(s)
Log Message:	- m_svinfo.c: intmax_t -> uintmax_t
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	8751	* 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	4564	* 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	6872	* - 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	3172	if (!IsServer(source_p) \|\| !MyConnect(source_p))
56	michael	2820	return 0;
57	adx	30
58			if (TS_CURRENT < atoi(parv[2]) \|\| atoi(parv[1]) < TS_MIN)
59	michael	1298	{
60			/*
61	michael	3294	* A server with the wrong TS version connected; since we're
62	michael	1298	* TS_ONLY we can't fall back to the non-TS protocol so
63			* we drop the link -orabidoo
64			*/
65	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
66	michael	6862	"Link %s dropped, wrong TS protocol version (%s,%s)",
67	michael	7996	client_get_name(source_p, SHOW_IP), parv[1], parv[2]);
68	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
69	michael	6862	"Link %s dropped, wrong TS protocol version (%s,%s)",
70	michael	7996	client_get_name(source_p, MASK_IP), parv[1], parv[2]);
71	michael	6862	ilog(LOG_TYPE_IRCD,
72			"Link %s dropped, wrong TS protocol version (%s,%s)",
73	michael	7996	client_get_name(source_p, SHOW_IP), parv[1], parv[2]);
74	michael	6797
75	michael	3171	exit_client(source_p, "Incompatible TS version");
76	michael	2820	return 0;
77	michael	1298	}
78	adx	30
79			/*
80	michael	8927	* Since we're here, might as well set event_base->time.sec_real while we're at it
81	adx	30	*/
82	michael	8901	event_time_set();
83	michael	3294
84	michael	8976	uintmax_t theirtime = strtoumax(parv[4], NULL, 10);
85	michael	8927	intmax_t deltat = imaxabs(theirtime - event_base->time.sec_real);
86	adx	30
87	michael	4341	if (deltat > ConfigGeneral.ts_max_delta)
88	michael	1298	{
89	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
90	michael	8976	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
91	michael	8927	client_get_name(source_p, SHOW_IP), event_base->time.sec_real, theirtime, deltat);
92	michael	6317	sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
93	michael	8976	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
94	michael	8927	client_get_name(source_p, MASK_IP), event_base->time.sec_real, theirtime, deltat);
95	michael	1298	ilog(LOG_TYPE_IRCD,
96	michael	8976	"Link %s dropped, excessive TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
97	michael	8927	client_get_name(source_p, SHOW_IP), event_base->time.sec_real, theirtime, deltat);
98	michael	6797
99	michael	3171	exit_client(source_p, "Excessive TS delta");
100	michael	2820	return 0;
101	michael	1298	}
102	adx	30
103	michael	4341	if (deltat > ConfigGeneral.ts_warn_delta)
104	michael	6859	{
105			sendto_realops_flags(UMODE_SERVNOTICE, L_ADMIN, SEND_NOTICE,
106	michael	8976	"Link %s notable TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
107	michael	8927	client_get_name(source_p, SHOW_IP), event_base->time.sec_real, theirtime, deltat);
108	michael	6859	sendto_realops_flags(UMODE_SERVNOTICE, L_OPER, SEND_NOTICE,
109	michael	8976	"Link %s notable TS delta (my TS=%ju, their TS=%ju, delta=%ji)",
110	michael	8927	client_get_name(source_p, MASK_IP), event_base->time.sec_real, theirtime, deltat);
111	michael	6859	}
112
113	michael	2820	return 0;
114	adx	30	}
115	michael	1230
116	michael	2820	static struct Message svinfo_msgtab =
117			{
118	michael	5880	.cmd = "SVINFO",
119			.args_min = 5,
120			.args_max = MAXPARA,
121			.handlers[UNREGISTERED_HANDLER] = m_unregistered,
122			.handlers[CLIENT_HANDLER] = m_ignore,
123			.handlers[SERVER_HANDLER] = ms_svinfo,
124			.handlers[ENCAP_HANDLER] = m_ignore,
125			.handlers[OPER_HANDLER] = m_ignore
126	michael	1230	};
127
128			static void
129			module_init(void)
130			{
131			mod_add_cmd(&svinfo_msgtab);
132			}
133
134			static void
135			module_exit(void)
136			{
137			mod_del_cmd(&svinfo_msgtab);
138			}
139
140	michael	2820	struct module module_entry =
141			{
142	michael	1230	.version = "$Revision$",
143			.modinit = module_init,
144			.modexit = module_exit,
145			};