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      1 /* $OpenBSD: clientloop.h,v 1.28 2011/06/22 22:08:42 djm Exp $ */
      2 
      3 /*
      4  * Author: Tatu Ylonen <ylo (at) cs.hut.fi>
      5  * Copyright (c) 1995 Tatu Ylonen <ylo (at) cs.hut.fi>, Espoo, Finland
      6  *                    All rights reserved
      7  *
      8  * As far as I am concerned, the code I have written for this software
      9  * can be used freely for any purpose.  Any derived versions of this
     10  * software must be clearly marked as such, and if the derived work is
     11  * incompatible with the protocol description in the RFC file, it must be
     12  * called by a name other than "ssh" or "Secure Shell".
     13  */
     14 /*
     15  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
     16  *
     17  * Redistribution and use in source and binary forms, with or without
     18  * modification, are permitted provided that the following conditions
     19  * are met:
     20  * 1. Redistributions of source code must retain the above copyright
     21  *    notice, this list of conditions and the following disclaimer.
     22  * 2. Redistributions in binary form must reproduce the above copyright
     23  *    notice, this list of conditions and the following disclaimer in the
     24  *    documentation and/or other materials provided with the distribution.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     29  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     30  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     35  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #include <termios.h>
     39 
     40 /* Client side main loop for the interactive session. */
     41 int	 client_loop(int, int, int);
     42 void	 client_x11_get_proto(const char *, const char *, u_int, u_int,
     43 	    char **, char **);
     44 void	 client_global_request_reply_fwd(int, u_int32_t, void *);
     45 void	 client_session2_setup(int, int, int, const char *, struct termios *,
     46 	    int, Buffer *, char **);
     47 int	 client_request_tun_fwd(int, int, int);
     48 void	 client_stop_mux(void);
     49 
     50 /* Escape filter for protocol 2 sessions */
     51 void	*client_new_escape_filter_ctx(int);
     52 void	 client_filter_cleanup(int, void *);
     53 int	 client_simple_escape_filter(Channel *, char *, int);
     54 
     55 /* Global request confirmation callbacks */
     56 typedef void global_confirm_cb(int, u_int32_t seq, void *);
     57 void	 client_register_global_confirm(global_confirm_cb *, void *);
     58 
     59 /* Channel request confirmation callbacks */
     60 enum confirm_action { CONFIRM_WARN = 0, CONFIRM_CLOSE, CONFIRM_TTY };
     61 void client_expect_confirm(int, const char *, enum confirm_action);
     62 
     63 /* Multiplexing protocol version */
     64 #define SSHMUX_VER			4
     65 
     66 /* Multiplexing control protocol flags */
     67 #define SSHMUX_COMMAND_OPEN		1	/* Open new connection */
     68 #define SSHMUX_COMMAND_ALIVE_CHECK	2	/* Check master is alive */
     69 #define SSHMUX_COMMAND_TERMINATE	3	/* Ask master to exit */
     70 #define SSHMUX_COMMAND_STDIO_FWD	4	/* Open stdio fwd (ssh -W) */
     71 #define SSHMUX_COMMAND_FORWARD		5	/* Forward only, no command */
     72 #define SSHMUX_COMMAND_STOP		6	/* Disable mux but not conn */
     73 
     74 void	muxserver_listen(void);
     75 void	muxclient(const char *);
     76 void	mux_exit_message(Channel *, int);
     77 void	mux_tty_alloc_failed(Channel *);
     78 
     79