modules/m_pong.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_pong.c: The reply to a ping message.
   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
  25 #include "stdinc.h"
  26 #include "ircd.h"
  27 #include "s_user.h"
  28 #include "client.h"
  29 #include "hash.h"               /* for find_client() */
  30 #include "hook.h"
  31 #include "numeric.h"
  32 #include "s_conf.h"
  33 #include "send.h"
  34 #include "channel.h"
  35 #include "match.h"
  36 #include "msg.h"
  37 #include "parse.h"
  38 #include "hash.h"
  39 #include "modules.h"
  40
  41 static const char pong_desc[] = "Provides the PONG command to respond to a PING message";
  42
  43 static void mr_pong(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  44 static void ms_pong(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
  45
  46 struct Message pong_msgtab = {
  47         "PONG", 0, 0, 0, 0,
  48         {{mr_pong, 0}, mg_ignore, mg_ignore, {ms_pong, 2}, mg_ignore, mg_ignore}
  49 };
  50
  51 mapi_clist_av1 pong_clist[] = { &pong_msgtab, NULL };
  52
  53 DECLARE_MODULE_AV2(pong, NULL, NULL, pong_clist, NULL, NULL, NULL, NULL, pong_desc);
  54
  55 static void
  56 ms_pong(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  57 {
  58         struct Client *target_p;
  59         const char *destination;
  60
  61         destination = parv[2];
  62         source_p->flags &= ~FLAGS_PINGSENT;
  63
  64         /* Now attempt to route the PONG, comstud pointed out routable PING
  65          * is used for SPING.  routable PING should also probably be left in
  66          *        -Dianora
  67          * That being the case, we will route, but only for registered clients (a
  68          * case can be made to allow them only from servers). -Shadowfax
  69          */
  70         if(!EmptyString(destination) && !match(destination, me.name) &&
  71            irccmp(destination, me.id))
  72         {
  73                 if((target_p = find_client(destination)))
  74                         sendto_one(target_p, ":%s PONG %s %s",
  75                                    get_id(source_p, target_p), parv[1],
  76                                    get_id(target_p, target_p));
  77                 else
  78                 {
  79                         if(!IsDigit(*destination))
  80                                 sendto_one_numeric(source_p, ERR_NOSUCHSERVER,
  81                                                    form_str(ERR_NOSUCHSERVER), destination);
  82                         return;
  83                 }
  84         }
  85
  86         /* destination is us, emulate EOB */
  87         if(IsServer(source_p) && !HasSentEob(source_p))
  88         {
  89                 if(MyConnect(source_p))
  90                         sendto_realops_snomask(SNO_GENERAL, L_ALL,
  91                                              "End of burst (emulated) from %s (%d seconds)",
  92                                              source_p->name,
  93                                              (signed int) (rb_current_time() - source_p->localClient->firsttime));
  94                 SetEob(source_p);
  95                 eob_count++;
  96                 call_hook(h_server_eob, source_p);
  97         }
  98 }
  99
 100 static void
 101 mr_pong(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 102 {
 103         if(parc == 2 && !EmptyString(parv[1]))
 104         {
 105                 if(ConfigFileEntry.ping_cookie && source_p->flags & FLAGS_SENTUSER && source_p->name[0])
 106                 {
 107                         uint32_t incoming_ping = strtoul(parv[1], NULL, 16);
 108                         if(incoming_ping)
 109                         {
 110                                 if(source_p->localClient->random_ping == incoming_ping)
 111                                 {
 112                                         source_p->flags |= FLAGS_PING_COOKIE;
 113                                         register_local_user(client_p, source_p);
 114                                 }
 115                                 else
 116                                 {
 117                                         sendto_one(source_p, form_str(ERR_WRONGPONG),
 118                                                    me.name, source_p->name,
 119                                                    source_p->localClient->random_ping);
 120                                         return;
 121                                 }
 122                         }
 123                 }
 124
 125         }
 126         else
 127                 sendto_one(source_p, form_str(ERR_NOORIGIN), me.name, source_p->name);
 128
 129         source_p->flags &= ~FLAGS_PINGSENT;
 130 }