modules/m_svinfo.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_svinfo.c: Sends TS information for clock & compatibility checks.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: m_svinfo.c 494 2006-01-15 16:08:28Z jilles $
  25  */
  26 #include "stdinc.h"
  27 #include "client.h"
  28 #include "common.h"             /* TRUE bleah */
  29 #include "match.h"
  30 #include "ircd.h"
  31 #include "numeric.h"
  32 #include "send.h"
  33 #include "s_conf.h"
  34 #include "s_newconf.h"
  35 #include "logger.h"
  36 #include "msg.h"
  37 #include "parse.h"
  38 #include "modules.h"
  39
  40 static int ms_svinfo(struct Client *, struct Client *, int, const char **);
  41
  42 struct Message svinfo_msgtab = {
  43         "SVINFO", 0, 0, 0, MFLG_SLOW,
  44         {mg_unreg, mg_ignore, mg_ignore, {ms_svinfo, 5}, mg_ignore, mg_ignore}
  45 };
  46
  47 mapi_clist_av1 svinfo_clist[] = { &svinfo_msgtab, NULL };
  48 DECLARE_MODULE_AV1(svinfo, NULL, NULL, svinfo_clist, NULL, NULL, "$Revision: 494 $");
  49
  50 /*
  51  * ms_svinfo - SVINFO message handler
  52  *      parv[1] = TS_CURRENT for the server
  53  *      parv[2] = TS_MIN for the server
  54  *      parv[3] = unused, send 0
  55  *      parv[4] = server's idea of UTC time
  56  */
  57 static int
  58 ms_svinfo(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  59 {
  60         signed int deltat;
  61         time_t theirtime;
  62         char squitreason[120];
  63
  64         /* SVINFO isnt remote. */
  65         if(source_p != client_p)
  66                 return 0;
  67
  68         if(TS_CURRENT < atoi(parv[2]) || atoi(parv[1]) < TS_MIN)
  69         {
  70                 /* TS version is too low on one of the sides, drop the link */
  71                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
  72                                      "Link %s dropped, wrong TS protocol version (%s,%s)",
  73                                      source_p->name, parv[1], parv[2]);
  74                 rb_snprintf(squitreason, sizeof squitreason, "Incompatible TS version (%s,%s)",
  75                                 parv[1], parv[2]);
  76                 exit_client(source_p, source_p, source_p, squitreason);
  77                 return 0;
  78         }
  79
  80         /*
  81          * since we're here, might as well set rb_current_time() while we're at it
  82          */
  83         rb_set_time();
  84         theirtime = atol(parv[4]);
  85         deltat = abs(theirtime - rb_current_time());
  86
  87         if(deltat > ConfigFileEntry.ts_max_delta)
  88         {
  89                 sendto_realops_snomask(SNO_GENERAL, L_ALL,
  90                                      "Link %s dropped, excessive TS delta"
  91                                      " (my TS=%ld, their TS=%ld, delta=%d)",
  92                                      source_p->name,
  93                                      (long) rb_current_time(), (long) theirtime, deltat);
  94                 ilog(L_SERVER,
  95                      "Link %s dropped, excessive TS delta"
  96                      " (my TS=%ld, their TS=%ld, delta=%d)",
  97                      log_client_name(source_p, SHOW_IP), (long) rb_current_time(), (long) theirtime, deltat);
  98                 rb_snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%d)",
  99                                 (long) rb_current_time(), (long) theirtime, deltat);
 100                 disable_server_conf_autoconn(source_p->name);
 101                 exit_client(source_p, source_p, source_p, squitreason);
 102                 return 0;
 103         }
 104
 105         if(deltat > ConfigFileEntry.ts_warn_delta)
 106         {
 107                 sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
 108                                      "Link %s notable TS delta"
 109                                      " (my TS=%ld, their TS=%ld, delta=%d)",
 110                                      source_p->name, (long) rb_current_time(), (long) theirtime, deltat);
 111         }
 112
 113         return 0;
 114 }
 115