modules/m_connect.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  m_connect.c: Connects to a remote IRC server.
   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_connect.c 21275 2005-11-21 19:45:08Z leeh $
  25  */
  26
  27 #include "stdinc.h"
  28 #include "client.h"
  29 #include "ircd.h"
  30 #include "irc_string.h"
  31 #include "numeric.h"
  32 #include "commio.h"
  33 #include "s_conf.h"
  34 #include "s_newconf.h"
  35 #include "s_log.h"
  36 #include "s_serv.h"
  37 #include "send.h"
  38 #include "msg.h"
  39 #include "parse.h"
  40 #include "hash.h"
  41 #include "modules.h"
  42
  43 static int mo_connect(struct Client *, struct Client *, int, const char **);
  44 static int ms_connect(struct Client *, struct Client *, int, const char **);
  45
  46 struct Message connect_msgtab = {
  47         "CONNECT", 0, 0, 0, MFLG_SLOW,
  48         {mg_unreg, mg_not_oper, {ms_connect, 4}, {ms_connect, 4}, mg_ignore, {mo_connect, 2}}
  49 };
  50
  51 mapi_clist_av1 connect_clist[] = { &connect_msgtab, NULL };
  52 DECLARE_MODULE_AV1(connect, NULL, NULL, connect_clist, NULL, NULL, "$Revision: 21275 $");
  53
  54 /*
  55  * mo_connect - CONNECT command handler
  56  *
  57  * Added by Jto 11 Feb 1989
  58  *
  59  * m_connect
  60  *      parv[0] = sender prefix
  61  *      parv[1] = servername
  62  *      parv[2] = port number
  63  *      parv[3] = remote server
  64  */
  65 static int
  66 mo_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  67 {
  68         int port;
  69         int tmpport;
  70         struct server_conf *server_p;
  71         struct Client *target_p;
  72
  73         /* always privileged with handlers */
  74
  75         if(MyConnect(source_p) && !IsOperRemote(source_p) && parc > 3)
  76         {
  77                 sendto_one(source_p, form_str(ERR_NOPRIVS),
  78                            me.name, source_p->name, "remote");
  79                 return 0;
  80         }
  81
  82         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
  83                 return 0;
  84
  85         if((target_p = find_server(source_p, parv[1])))
  86         {
  87                 sendto_one(source_p, ":%s NOTICE %s :Connect: Server %s already exists from %s.",
  88                            me.name, parv[0], parv[1], target_p->from->name);
  89                 return 0;
  90         }
  91
  92         /*
  93          * try to find the name, then host, if both fail notify ops and bail
  94          */
  95         if((server_p = find_server_conf(parv[1])) == NULL)
  96         {
  97                 sendto_one(source_p,
  98                            "NOTICE %s :Connect: Host %s not listed in ircd.conf",
  99                            parv[0], parv[1]);
 100                 return 0;
 101         }
 102
 103         /*
 104          * Get port number from user, if given. If not specified,
 105          * use the default form configuration structure. If missing
 106          * from there, then use the precompiled default.
 107          */
 108         tmpport = port = server_p->port;
 109         if(parc > 2 && !EmptyString(parv[2]))
 110         {
 111                 if((port = atoi(parv[2])) <= 0)
 112                 {
 113                         sendto_one(source_p, "NOTICE %s :Connect: Illegal port number", parv[0]);
 114                         return 0;
 115                 }
 116         }
 117         else if(port <= 0 && (port = PORTNUM) <= 0)
 118         {
 119                 sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
 120                            me.name, parv[0]);
 121                 return 0;
 122         }
 123         /*
 124          * Notify all operators about remote connect requests
 125          */
 126
 127         ilog(L_SERVER, "CONNECT From %s : %s %s", parv[0], parv[1], parc > 2 ? parv[2] : "");
 128
 129         server_p->port = port;
 130         /*
 131          * at this point we should be calling connect_server with a valid
 132          * C:line and a valid port in the C:line
 133          */
 134         if(serv_connect(server_p, source_p))
 135                 sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
 136                                 me.name, parv[0], server_p->name, server_p->port);
 137         else
 138                 sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
 139                                 me.name, parv[0], server_p->name, server_p->port);
 140
 141
 142         /*
 143          * client is either connecting with all the data it needs or has been
 144          * destroyed
 145          */
 146         server_p->port = tmpport;
 147         return 0;
 148 }
 149
 150 /*
 151  * ms_connect - CONNECT command handler
 152  *
 153  * Added by Jto 11 Feb 1989
 154  *
 155  * m_connect
 156  *      parv[0] = sender prefix
 157  *      parv[1] = servername
 158  *      parv[2] = port number
 159  *      parv[3] = remote server
 160  */
 161 static int
 162 ms_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 163 {
 164         int port;
 165         int tmpport;
 166         struct server_conf *server_p;
 167         struct Client *target_p;
 168
 169         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
 170                 return 0;
 171
 172         if((target_p = find_server(NULL, parv[1])))
 173         {
 174                 sendto_one_notice(source_p, ":Connect: Server %s already exists from %s.",
 175                                   parv[1], target_p->from->name);
 176                 return 0;
 177         }
 178
 179         /*
 180          * try to find the name, then host, if both fail notify ops and bail
 181          */
 182         if((server_p = find_server_conf(parv[1])) == NULL)
 183         {
 184                 sendto_one_notice(source_p, ":Connect: Host %s not listed in ircd.conf",
 185                                   parv[1]);
 186                 return 0;
 187         }
 188
 189         /*
 190          * Get port number from user, if given. If not specified,
 191          * use the default form configuration structure. If missing
 192          * from there, then use the precompiled default.
 193          */
 194         tmpport = server_p->port;
 195
 196         port = atoi(parv[2]);
 197
 198         /* if someone sends port 0, and we have a config port.. use it */
 199         if(port == 0 && server_p->port)
 200                 port = server_p->port;
 201         else if(port <= 0)
 202         {
 203                 sendto_one_notice(source_p, ":Connect: Illegal port number");
 204                 return 0;
 205         }
 206
 207         /*
 208          * Notify all operators about remote connect requests
 209          */
 210         sendto_wallops_flags(UMODE_WALLOP, &me,
 211                              "Remote CONNECT %s %d from %s",
 212                              parv[1], port, source_p->name);
 213         sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 214                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 215                       me.id, parv[1], port, source_p->name);
 216         sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
 217                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 218                       me.name, parv[1], port, source_p->name);
 219
 220         ilog(L_SERVER, "CONNECT From %s : %s %d", source_p->name, parv[1], port);
 221
 222         server_p->port = port;
 223         /*
 224          * at this point we should be calling connect_server with a valid
 225          * C:line and a valid port in the C:line
 226          */
 227         if(serv_connect(server_p, source_p))
 228                 sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 229                                   server_p->name, server_p->port);
 230         else
 231                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 232                                   server_p->name, server_p->port);
 233         /*
 234          * client is either connecting with all the data it needs or has been
 235          * destroyed
 236          */
 237         server_p->port = tmpport;
 238         return 0;
 239 }