53307da8ca
Note that in some cases (different TS delta settings, heavy lag) it is possible only one of the servers detects the problem and autoconnect may be left enabled. The mechanism used for disabling is the same as /quote set autoconn <server> 0; the A flag in /stats c disappears and a rehash or /quote set autoconn can put it back.
116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_svinfo.c: Sends TS information for clock & compatibility checks.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* $Id: m_svinfo.c 494 2006-01-15 16:08:28Z jilles $
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*/
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#include "stdinc.h"
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#include "client.h"
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#include "common.h" /* TRUE bleah */
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#include "match.h"
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#include "ircd.h"
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#include "numeric.h"
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#include "send.h"
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#include "s_conf.h"
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#include "s_newconf.h"
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#include "logger.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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static int ms_svinfo(struct Client *, struct Client *, int, const char **);
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struct Message svinfo_msgtab = {
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"SVINFO", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_ignore, mg_ignore, {ms_svinfo, 5}, mg_ignore, mg_ignore}
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};
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mapi_clist_av1 svinfo_clist[] = { &svinfo_msgtab, NULL };
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DECLARE_MODULE_AV1(svinfo, NULL, NULL, svinfo_clist, NULL, NULL, "$Revision: 494 $");
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/*
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* ms_svinfo - SVINFO message handler
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* parv[1] = TS_CURRENT for the server
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* parv[2] = TS_MIN for the server
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* parv[3] = unused, send 0
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* parv[4] = server's idea of UTC time
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*/
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static int
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ms_svinfo(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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signed int deltat;
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time_t theirtime;
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char squitreason[120];
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/* SVINFO isnt remote. */
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if(source_p != client_p)
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return 0;
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if(TS_CURRENT < atoi(parv[2]) || atoi(parv[1]) < TS_MIN)
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{
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/* TS version is too low on one of the sides, drop the link */
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Link %s dropped, wrong TS protocol version (%s,%s)",
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source_p->name, parv[1], parv[2]);
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rb_snprintf(squitreason, sizeof squitreason, "Incompatible TS version (%s,%s)",
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parv[1], parv[2]);
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exit_client(source_p, source_p, source_p, squitreason);
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return 0;
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}
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/*
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* since we're here, might as well set rb_current_time() while we're at it
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*/
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rb_set_time();
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theirtime = atol(parv[4]);
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deltat = abs(theirtime - rb_current_time());
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if(deltat > ConfigFileEntry.ts_max_delta)
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Link %s dropped, excessive TS delta"
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" (my TS=%ld, their TS=%ld, delta=%d)",
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source_p->name,
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(long) rb_current_time(), (long) theirtime, deltat);
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ilog(L_SERVER,
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"Link %s dropped, excessive TS delta"
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" (my TS=%ld, their TS=%ld, delta=%d)",
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log_client_name(source_p, SHOW_IP), (long) rb_current_time(), (long) theirtime, deltat);
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rb_snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%d)",
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(long) rb_current_time(), (long) theirtime, deltat);
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disable_server_conf_autoconn(source_p->name);
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exit_client(source_p, source_p, source_p, squitreason);
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return 0;
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}
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if(deltat > ConfigFileEntry.ts_warn_delta)
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{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
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"Link %s notable TS delta"
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" (my TS=%ld, their TS=%ld, delta=%d)",
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source_p->name, (long) rb_current_time(), (long) theirtime, deltat);
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}
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return 0;
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}
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