tcpfwd.h

   1 /*
   2  * Dropbear - a SSH2 server
   3  *
   4  * Copyright (c) 2002,2003 Matt Johnston
   5  * All rights reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE. */
  24 #ifndef _TCPFWD_H
  25 #define _TCPFWD_H
  26
  27 #include "channel.h"
  28 #include "list.h"
  29
  30 struct TCPListener {
  31
  32         /* For a direct-tcpip request, it's the addr/port we want the other
  33          * end to connect to */
  34         unsigned char *sendaddr;
  35         unsigned int sendport;
  36
  37         /* This is the address/port that we listen on. The address has special
  38          * meanings as per the rfc, "" for all interfaces, "localhost" for
  39          * localhost, or a normal interface name. */
  40         unsigned char *listenaddr;
  41         unsigned int listenport;
  42
  43         const struct ChanType *chantype;
  44         enum {direct, forwarded} tcp_type;
  45 };
  46
  47 /* A forwarding entry */
  48 struct TCPFwdEntry {
  49         const unsigned char* connectaddr;
  50         unsigned int connectport;
  51         const unsigned char* listenaddr;
  52         unsigned int listenport;
  53         unsigned int have_reply; /* is set to 1 after a reply has been received
  54                                                                 when setting up the forwarding */
  55 };
  56
  57 /* Server */
  58 void recv_msg_global_request_remotetcp();
  59
  60 extern const struct ChanType svr_chan_tcpdirect;
  61
  62 /* Client */
  63 void setup_localtcp();
  64 void setup_remotetcp();
  65 extern const struct ChanType cli_chan_tcpremote;
  66 void cli_recv_msg_request_success();
  67 void cli_recv_msg_request_failure();
  68
  69 /* Common */
  70 int listen_tcpfwd(struct TCPListener* tcpinfo);
  71
  72 #endif