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 254 2005-09-21 23:35:12Z 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 "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: 254 $");
  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         {
 136 #ifndef HIDE_SERVERS_IPS
 137                         sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s[%s].%d",
 138                                    me.name, parv[0], server_p->host, server_p->name, server_p->port);
 139 #else
 140                         sendto_one(source_p, ":%s NOTICE %s :*** Connecting to %s.%d",
 141                                    me.name, parv[0], server_p->name, server_p->port);
 142 #endif
 143
 144         }
 145         else
 146         {
 147                 sendto_one(source_p, ":%s NOTICE %s :*** Couldn't connect to %s.%d",
 148                            me.name, parv[0], server_p->name, server_p->port);
 149
 150         }
 151
 152         /*
 153          * client is either connecting with all the data it needs or has been
 154          * destroyed
 155          */
 156         server_p->port = tmpport;
 157         return 0;
 158 }
 159
 160 /*
 161  * ms_connect - CONNECT command handler
 162  *
 163  * Added by Jto 11 Feb 1989
 164  *
 165  * m_connect
 166  *      parv[0] = sender prefix
 167  *      parv[1] = servername
 168  *      parv[2] = port number
 169  *      parv[3] = remote server
 170  */
 171 static int
 172 ms_connect(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
 173 {
 174         int port;
 175         int tmpport;
 176         struct server_conf *server_p;
 177         struct Client *target_p;
 178
 179         if(hunt_server(client_p, source_p, ":%s CONNECT %s %s :%s", 3, parc, parv) != HUNTED_ISME)
 180                 return 0;
 181
 182         if((target_p = find_server(NULL, parv[1])))
 183         {
 184                 sendto_one_notice(source_p, ":Connect: Server %s already exists from %s.",
 185                                   parv[1], target_p->from->name);
 186                 return 0;
 187         }
 188
 189         /*
 190          * try to find the name, then host, if both fail notify ops and bail
 191          */
 192         if((server_p = find_server_conf(parv[1])) == NULL)
 193         {
 194                 sendto_one_notice(source_p, ":Connect: Host %s not listed in ircd.conf",
 195                                   parv[1]);
 196                 return 0;
 197         }
 198
 199         /*
 200          * Get port number from user, if given. If not specified,
 201          * use the default form configuration structure. If missing
 202          * from there, then use the precompiled default.
 203          */
 204         tmpport = server_p->port;
 205
 206         port = atoi(parv[2]);
 207
 208         /* if someone sends port 0, and we have a config port.. use it */
 209         if(port == 0 && server_p->port)
 210                 port = server_p->port;
 211         else if(port <= 0)
 212         {
 213                 sendto_one_notice(source_p, ":Connect: Illegal port number");
 214                 return 0;
 215         }
 216
 217         /*
 218          * Notify all operators about remote connect requests
 219          */
 220         sendto_wallops_flags(UMODE_WALLOP, &me,
 221                              "Remote CONNECT %s %d from %s",
 222                              parv[1], port, source_p->name);
 223         sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 224                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 225                       me.id, parv[1], port, source_p->name);
 226         sendto_server(NULL, NULL, NOCAPS, CAP_TS6,
 227                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 228                       me.name, parv[1], port, source_p->name);
 229
 230         ilog(L_SERVER, "CONNECT From %s : %s %d", source_p->name, parv[1], port);
 231
 232         server_p->port = port;
 233         /*
 234          * at this point we should be calling connect_server with a valid
 235          * C:line and a valid port in the C:line
 236          */
 237         if(serv_connect(server_p, source_p))
 238                 sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 239                                   server_p->name, server_p->port);
 240         else
 241                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 242                                   server_p->name, server_p->port);
 243         /*
 244          * client is either connecting with all the data it needs or has been
 245          * destroyed
 246          */
 247         server_p->port = tmpport;
 248         return 0;
 249 }