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 3161 2007-01-25 07:23:01Z nenolod $
  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 "s_conf.h"
  33 #include "s_newconf.h"
  34 #include "s_log.h"
  35 #include "s_serv.h"
  36 #include "send.h"
  37 #include "msg.h"
  38 #include "parse.h"
  39 #include "hash.h"
  40 #include "modules.h"
  41
  42 static int mo_connect(struct Client *, struct Client *, int, const char **);
  43 static int ms_connect(struct Client *, struct Client *, int, const char **);
  44
  45 struct Message connect_msgtab = {
  46         "CONNECT", 0, 0, 0, MFLG_SLOW,
  47         {mg_unreg, mg_not_oper, {ms_connect, 4}, {ms_connect, 4}, mg_ignore, {mo_connect, 2}}
  48 };
  49
  50 mapi_clist_av1 connect_clist[] = { &connect_msgtab, NULL };
  51 DECLARE_MODULE_AV1(connect, NULL, NULL, connect_clist, NULL, NULL, "$Revision: 3161 $");
  52
  53 /*
  54  * mo_connect - CONNECT command handler
  55  *
  56  * Added by Jto 11 Feb 1989
  57  *
  58  * m_connect
  59  *      parv[0] = sender prefix
  60  *      parv[1] = servername
  61  *      parv[2] = port number
  62  *      parv[3] = remote server
  63  */
  64 static int
  65 mo_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
  66 {
  67         int port;
  68         int tmpport;
  69         struct server_conf *server_p;
  70         struct Client *target_p;
  71
  72         /* always privileged with handlers */
  73
  74         if(MyConnect(source_p) && !IsOperRemote(source_p) && parc > 3)
  75         {
  76                 sendto_one(source_p, form_str(ERR_NOPRIVS),
  77                            me.name, source_p->name, "remote");
  78                 return 0;
  79         }
  80
  81         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
  82                 return 0;
  83
  84         if((target_p = find_server(source_p, parv[1])))
  85         {
  86                 sendto_one_notice(source_p, ":Connect: Server %s already exists from %s.", parv[1],
  87                         target_p->from->name);
  88                 return 0;
  89         }
  90
  91         /*
  92          * try to find the name, then host, if both fail notify ops and bail
  93          */
  94         if((server_p = find_server_conf(parv[1])) == NULL)
  95         {
  96                 sendto_one_notice(source_p, ":Connect: Host %s not listed in ircd.conf", parv[1]);
  97                 return 0;
  98         }
  99
 100         /*
 101          * Get port number from user, if given. If not specified,
 102          * use the default form configuration structure. If missing
 103          * from there, then use the precompiled default.
 104          */
 105         tmpport = port = server_p->port;
 106         if(parc > 2 && !EmptyString(parv[2]))
 107         {
 108                 if((port = atoi(parv[2])) <= 0)
 109                 {
 110                         sendto_one_notice(source_p, ":Connect: Illegal port number");
 111                         return 0;
 112                 }
 113         }
 114         else if(port <= 0 && (port = PORTNUM) <= 0)
 115         {
 116                 sendto_one_notice(source_p, ":Connect: missing port number");
 117                 return 0;
 118         }
 119         /*
 120          * Notify all operators about remote connect requests
 121          */
 122
 123         ilog(L_SERVER, "CONNECT From %s : %s %s", parv[0], parv[1], parc > 2 ? parv[2] : "");
 124
 125         server_p->port = port;
 126         /*
 127          * at this point we should be calling connect_server with a valid
 128          * C:line and a valid port in the C:line
 129          */
 130         if(serv_connect(server_p, source_p))
 131         {
 132 #ifndef HIDE_SERVERS_IPS
 133                         sendto_one_notice(source_p, ":*** Connecting to %s[%s].%d",
 134                                 server_p->host, server_p->name, server_p->port);
 135 #else
 136                         sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 137                                 server_p->name, server_p->port);
 138 #endif
 139
 140         }
 141         else
 142         {
 143                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 144                         server_p->name, server_p->port);
 145         }
 146
 147         /*
 148          * client is either connecting with all the data it needs or has been
 149          * destroyed
 150          */
 151         server_p->port = tmpport;
 152         return 0;
 153 }
 154
 155 /*
 156  * ms_connect - CONNECT command handler
 157  *
 158  * Added by Jto 11 Feb 1989
 159  *
 160  * m_connect
 161  *      parv[0] = sender prefix
 162  *      parv[1] = servername
 163  *      parv[2] = port number
 164  *      parv[3] = remote server
 165  */
 166 static int
 167 ms_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 168 {
 169         int port;
 170         int tmpport;
 171         struct server_conf *server_p;
 172         struct Client *target_p;
 173
 174         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
 175                 return 0;
 176
 177         if((target_p = find_server(NULL, parv[1])))
 178         {
 179                 sendto_one_notice(source_p, ":Connect: Server %s already exists from %s.",
 180                                   parv[1], target_p->from->name);
 181                 return 0;
 182         }
 183
 184         /*
 185          * try to find the name, then host, if both fail notify ops and bail
 186          */
 187         if((server_p = find_server_conf(parv[1])) == NULL)
 188         {
 189                 sendto_one_notice(source_p, ":Connect: Host %s not listed in ircd.conf",
 190                                   parv[1]);
 191                 return 0;
 192         }
 193
 194         /*
 195          * Get port number from user, if given. If not specified,
 196          * use the default form configuration structure. If missing
 197          * from there, then use the precompiled default.
 198          */
 199         tmpport = server_p->port;
 200
 201         port = atoi(parv[2]);
 202
 203         /* if someone sends port 0, and we have a config port.. use it */
 204         if(port == 0 && server_p->port)
 205                 port = server_p->port;
 206         else if(port <= 0)
 207         {
 208                 sendto_one_notice(source_p, ":Connect: Illegal port number");
 209                 return 0;
 210         }
 211
 212         /*
 213          * Notify all operators about remote connect requests
 214          */
 215         sendto_wallops_flags(UMODE_WALLOP, &me,
 216                              "Remote CONNECT %s %d from %s",
 217                              parv[1], port, source_p->name);
 218         sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 219                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 220                       me.id, parv[1], port, source_p->name);
 221         sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
 222                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 223                       me.name, parv[1], port, source_p->name);
 224
 225         ilog(L_SERVER, "CONNECT From %s : %s %d", source_p->name, parv[1], port);
 226
 227         server_p->port = port;
 228         /*
 229          * at this point we should be calling connect_server with a valid
 230          * C:line and a valid port in the C:line
 231          */
 232         if(serv_connect(server_p, source_p))
 233                 sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 234                                   server_p->name, server_p->port);
 235         else
 236                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 237                                   server_p->name, server_p->port);
 238         /*
 239          * client is either connecting with all the data it needs or has been
 240          * destroyed
 241          */
 242         server_p->port = tmpport;
 243         return 0;
 244 }