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
  25 #include "stdinc.h"
  26 #include "client.h"
  27 #include "ircd.h"
  28 #include "irc_string.h"
  29 #include "numeric.h"
  30 #include "commio.h"
  31 #include "s_conf.h"
  32 #include "s_newconf.h"
  33 #include "s_log.h"
  34 #include "s_serv.h"
  35 #include "send.h"
  36 #include "msg.h"
  37 #include "parse.h"
  38 #include "hash.h"
  39 #include "modules.h"
  40
  41 static int mo_connect(struct Client *, struct Client *, int, const char **);
  42 static int ms_connect(struct Client *, struct Client *, int, const char **);
  43
  44 struct Message connect_msgtab = {
  45         "CONNECT", 0, 0, 0, MFLG_SLOW,
  46         {mg_unreg, mg_not_oper, {ms_connect, 4}, {ms_connect, 4}, mg_ignore, {mo_connect, 2}}
  47 };
  48
  49 mapi_clist_av1 connect_clist[] = { &connect_msgtab, NULL };
  50 DECLARE_MODULE_AV1(connect, NULL, NULL, connect_clist, NULL, NULL, "$Revision: 82 $");
  51
  52 /*
  53  * mo_connect - CONNECT command handler
  54  *
  55  * Added by Jto 11 Feb 1989
  56  *
  57  * m_connect
  58  *      parv[0] = sender prefix
  59  *      parv[1] = servername
  60  *      parv[2] = port number
  61  *      parv[3] = remote server
  62  */
  63 static int
  64 mo_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  65 {
  66         int port;
  67         int tmpport;
  68         struct server_conf *server_p;
  69         struct Client *target_p;
  70
  71         /* always privileged with handlers */
  72
  73         if(MyConnect(source_p) && !IsOperRouting(source_p))
  74         {
  75                 sendto_one(source_p, form_str(ERR_NOPRIVS),
  76                            me.name, source_p->name, "routing");
  77                 return 0;
  78         }
  79
  80         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
  81                 return 0;
  82
  83         if((target_p = find_server(source_p, parv[1])))
  84         {
  85                 sendto_one(source_p, ":%s NOTICE %s :Connect: Server %s already exists from %s.",
  86                            me.name, parv[0], parv[1], target_p->from->name);
  87                 return 0;
  88         }
  89
  90         /*
  91          * try to find the name, then host, if both fail notify ops and bail
  92          */
  93         if((server_p = find_server_conf(parv[1])) == NULL)
  94         {
  95                 sendto_one(source_p,
  96                            "NOTICE %s :Connect: Host %s not listed in ircd.conf",
  97                            parv[0], parv[1]);
  98                 return 0;
  99         }
 100
 101         /*
 102          * Get port number from user, if given. If not specified,
 103          * use the default form configuration structure. If missing
 104          * from there, then use the precompiled default.
 105          */
 106         tmpport = port = server_p->port;
 107         if(parc > 2 && !EmptyString(parv[2]))
 108         {
 109                 if((port = atoi(parv[2])) <= 0)
 110                 {
 111                         sendto_one(source_p, "NOTICE %s :Connect: Illegal port number", parv[0]);
 112                         return 0;
 113                 }
 114         }
 115         else if(port <= 0 && (port = PORTNUM) <= 0)
 116         {
 117                 sendto_one(source_p, ":%s NOTICE %s :Connect: missing port number",
 118                            me.name, parv[0]);
 119                 return 0;
 120         }
 121         /*
 122          * Notify all operators about remote connect requests
 123          */
 124
 125         ilog(L_SERVER, "CONNECT From %s : %s %s", parv[0], parv[1], parc > 2 ? parv[2] : "");
 126
 127         server_p->port = port;
 128         /*
 129          * at this point we should be calling connect_server with a valid
 130          * C:line and a valid port in the C:line
 131          */
 132         if(serv_connect(server_p, source_p))
 133         {
 134 #ifndef HIDE_SERVERS_IPS
 135                         sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s[%s].%d",
 136                                    me.name, parv[0], server_p->host, server_p->name, server_p->port);
 137 #else
 138                         sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
 139                                    me.name, parv[0], server_p->name, server_p->port);
 140 #endif
 141
 142         }
 143         else
 144         {
 145                 sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
 146                            me.name, parv[0], server_p->name, server_p->port);
 147
 148         }
 149
 150         /*
 151          * client is either connecting with all the data it needs or has been
 152          * destroyed
 153          */
 154         server_p->port = tmpport;
 155         return 0;
 156 }
 157
 158 /*
 159  * ms_connect - CONNECT command handler
 160  *
 161  * Added by Jto 11 Feb 1989
 162  *
 163  * m_connect
 164  *      parv[0] = sender prefix
 165  *      parv[1] = servername
 166  *      parv[2] = port number
 167  *      parv[3] = remote server
 168  */
 169 static int
 170 ms_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 171 {
 172         int port;
 173         int tmpport;
 174         struct server_conf *server_p;
 175         struct Client *target_p;
 176
 177         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
 178                 return 0;
 179
 180         if((target_p = find_server(NULL, parv[1])))
 181         {
 182                 sendto_one_notice(source_p, ":Connect: Server %s already exists from %s.",
 183                                   parv[1], target_p->from->name);
 184                 return 0;
 185         }
 186
 187         /*
 188          * try to find the name, then host, if both fail notify ops and bail
 189          */
 190         if((server_p = find_server_conf(parv[1])) == NULL)
 191         {
 192                 sendto_one_notice(source_p, ":Connect: Host %s not listed in ircd.conf",
 193                                   parv[1]);
 194                 return 0;
 195         }
 196
 197         /*
 198          * Get port number from user, if given. If not specified,
 199          * use the default form configuration structure. If missing
 200          * from there, then use the precompiled default.
 201          */
 202         tmpport = server_p->port;
 203
 204         port = atoi(parv[2]);
 205
 206         /* if someone sends port 0, and we have a config port.. use it */
 207         if(port == 0 && server_p->port)
 208                 port = server_p->port;
 209         else if(port <= 0)
 210         {
 211                 sendto_one_notice(source_p, ":Connect: Illegal port number");
 212                 return 0;
 213         }
 214
 215         /*
 216          * Notify all operators about remote connect requests
 217          */
 218         sendto_wallops_flags(UMODE_WALLOP, &me,
 219                              "Remote CONNECT %s %d from %s",
 220                              parv[1], port, source_p->name);
 221         sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 222                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 223                       me.id, parv[1], port, source_p->name);
 224         sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
 225                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 226                       me.name, parv[1], port, source_p->name);
 227
 228         ilog(L_SERVER, "CONNECT From %s : %s %d", source_p->name, parv[1], port);
 229
 230         server_p->port = port;
 231         /*
 232          * at this point we should be calling connect_server with a valid
 233          * C:line and a valid port in the C:line
 234          */
 235         if(serv_connect(server_p, source_p))
 236                 sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 237                                   server_p->name, server_p->port);
 238         else
 239                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 240                                   server_p->name, server_p->port);
 241         /*
 242          * client is either connecting with all the data it needs or has been
 243          * destroyed
 244          */
 245         server_p->port = tmpport;
 246         return 0;
 247 }