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/*
* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
*
* Copyright (c) 1997-2018 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: m_svinfo.c 8436 2018-03-29 09:04:53Z michael $
*/
#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 CurrentTime while we're at it
*/
set_time();
intmax_t theirtime = strtoimax(parv[4], NULL, 10);
intmax_t 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)",
client_get_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)",
client_get_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)",
client_get_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)",
client_get_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)",
client_get_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: 8436 $",
.modinit = module_init,
.modexit = module_exit,
};
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