solanum/modules/m_svinfo.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_svinfo.c: Sends TS information for clock & compatibility checks.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "stdinc.h"
#include "client.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "send.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "logger.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
static const char svinfo_desc[] =
"Provides TS6 SVINFO command to ensure version and clock synchronisation";
static void ms_svinfo(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
struct Message svinfo_msgtab = {
"SVINFO", 0, 0, 0, 0,
{mg_unreg, mg_ignore, mg_ignore, {ms_svinfo, 5}, mg_ignore, mg_ignore}
};
mapi_clist_av1 svinfo_clist[] = { &svinfo_msgtab, NULL };
DECLARE_MODULE_AV2(svinfo, NULL, NULL, svinfo_clist, NULL, NULL, NULL, NULL, svinfo_desc);
/*
* ms_svinfo - SVINFO message handler
* parv[1] = TS_CURRENT for the server
* parv[2] = TS_MIN for the server
* parv[3] = unused, send 0
* parv[4] = server's idea of UTC time
*/
static void
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ms_svinfo(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
signed long deltat;
time_t theirtime;
char squitreason[120];
/* SVINFO isnt remote. */
if(source_p != client_p)
return;
if(TS_CURRENT < atoi(parv[2]) || atoi(parv[1]) < TS_MIN)
{
/* TS version is too low on one of the sides, drop the link */
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Link %s dropped, wrong TS protocol version (%s,%s)",
source_p->name, parv[1], parv[2]);
snprintf(squitreason, sizeof squitreason, "Incompatible TS version (%s,%s)",
parv[1], parv[2]);
exit_client(source_p, source_p, source_p, squitreason);
return;
}
/*
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* since we're here, might as well set rb_current_time() while we're at it
*/
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rb_set_time();
theirtime = atol(parv[4]);
deltat = labs(theirtime - rb_current_time());
if(deltat > ConfigFileEntry.ts_max_delta)
{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Link %s dropped, excessive TS delta"
" (my TS=%ld, their TS=%ld, delta=%ld)",
source_p->name,
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(long) rb_current_time(), (long) theirtime, deltat);
ilog(L_SERVER,
"Link %s dropped, excessive TS delta"
" (my TS=%ld, their TS=%ld, delta=%ld)",
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log_client_name(source_p, SHOW_IP), (long) rb_current_time(), (long) theirtime, deltat);
snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%ld)",
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(long) rb_current_time(), (long) theirtime, deltat);
disable_server_conf_autoconn(source_p->name);
exit_client(source_p, source_p, source_p, squitreason);
return;
}
if(deltat > ConfigFileEntry.ts_warn_delta)
{
sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"Link %s notable TS delta"
" (my TS=%ld, their TS=%ld, delta=%ld)",
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source_p->name, (long) rb_current_time(), (long) theirtime, deltat);
}
}