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
  26 #include "stdinc.h"
  27 #include "client.h"
  28 #include "ircd.h"
  29 #include "match.h"
  30 #include "numeric.h"
  31 #include "s_conf.h"
  32 #include "s_newconf.h"
  33 #include "logger.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 #include "sslproc.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[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) && !IsOperRemote(source_p) && parc > 3)
  74         {
  75                 sendto_one(source_p, form_str(ERR_NOPRIVS),
  76                            me.name, source_p->name, "remote");
  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_notice(source_p, ":Connect: Server %s already exists from %s.", parv[1],
  86                         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_notice(source_p, ":Connect: Host %s not listed in ircd.conf", parv[1]);
  96                 return 0;
  97         }
  98
  99         if(ServerConfSSL(server_p) && (!ssl_ok || !get_ssld_count()))
 100         {
 101                 sendto_one_notice(source_p,
 102                                   ":Connect: Server %s is set to use SSL/TLS but SSL/TLS is not configured.",
 103                                   parv[1]);
 104                 return 0;
 105         }
 106
 107         /*
 108          * Get port number from user, if given. If not specified,
 109          * use the default form configuration structure. If missing
 110          * from there, then use the precompiled default.
 111          */
 112         tmpport = port = server_p->port;
 113         if(parc > 2 && !EmptyString(parv[2]))
 114         {
 115                 if((port = atoi(parv[2])) <= 0)
 116                 {
 117                         sendto_one_notice(source_p, ":Connect: Illegal port number");
 118                         return 0;
 119                 }
 120         }
 121         else if(port <= 0 && (port = PORTNUM) <= 0)
 122         {
 123                 sendto_one_notice(source_p, ":Connect: missing port number");
 124                 return 0;
 125         }
 126         /*
 127          * Notify all operators about remote connect requests
 128          */
 129
 130         ilog(L_SERVER, "CONNECT From %s : %s %s", source_p->name, parv[1], parc > 2 ? parv[2] : "");
 131
 132         server_p->port = port;
 133         /*
 134          * at this point we should be calling connect_server with a valid
 135          * C:line and a valid port in the C:line
 136          */
 137         if(serv_connect(server_p, source_p))
 138         {
 139                         sendto_one_notice(source_p, ":*** Connecting to %s.%d",
 140                                 server_p->name, server_p->port);
 141         }
 142         else
 143         {
 144                 sendto_one_notice(source_p, ":*** Couldn't connect to %s.%d",
 145                         server_p->name, server_p->port);
 146         }
 147
 148         /*
 149          * client is either connecting with all the data it needs or has been
 150          * destroyed
 151          */
 152         server_p->port = tmpport;
 153         return 0;
 154 }
 155
 156 /*
 157  * ms_connect - CONNECT command handler
 158  *
 159  * Added by Jto 11 Feb 1989
 160  *
 161  * m_connect
 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         if(ServerConfSSL(server_p) && (!ssl_ok || !get_ssld_count()))
 195         {
 196                 sendto_one_notice(source_p,
 197                                   ":Connect: Server %s is set to use SSL/TLS but SSL/TLS is not configured.",
 198                                   parv[1]);
 199                 return 0;
 200         }
 201
 202         /*
 203          * Get port number from user, if given. If not specified,
 204          * use the default form configuration structure. If missing
 205          * from there, then use the precompiled default.
 206          */
 207         tmpport = server_p->port;
 208
 209         port = atoi(parv[2]);
 210
 211         /* if someone sends port 0, and we have a config port.. use it */
 212         if(port == 0 && server_p->port)
 213                 port = server_p->port;
 214         else if(port <= 0)
 215         {
 216                 sendto_one_notice(source_p, ":Connect: Illegal port number");
 217                 return 0;
 218         }
 219
 220         /*
 221          * Notify all operators about remote connect requests
 222          */
 223         sendto_wallops_flags(UMODE_WALLOP, &me,
 224                              "Remote CONNECT %s %d from %s",
 225                              parv[1], port, source_p->name);
 226         sendto_server(NULL, NULL, CAP_TS6, NOCAPS,
 227                       ":%s WALLOPS :Remote CONNECT %s %d from %s",
 228                       me.id, 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 }