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Diff for /src/usr.bin/ssh/channels.h between version 1.12 and 1.12.2.4

version 1.12, 2000/05/03 18:03:06 version 1.12.2.4, 2001/03/12 15:44:09
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 /* RCSID("$Id$"); */  /*
    * Author: Tatu Ylonen <ylo@cs.hut.fi>
    * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
    *                    All rights reserved
    *
    * As far as I am concerned, the code I have written for this software
    * can be used freely for any purpose.  Any derived versions of this
    * software must be clearly marked as such, and if the derived work is
    * incompatible with the protocol description in the RFC file, it must be
    * called by a name other than "ssh" or "Secure Shell".
    */
   /*
    * Copyright (c) 2000 Markus Friedl.  All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions and the following disclaimer.
    * 2. Redistributions in binary form must reproduce the above copyright
    *    notice, this list of conditions and the following disclaimer in the
    *    documentation and/or other materials provided with the distribution.
    *
    * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
    * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
    * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
    * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
    * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
    * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    */
   /* RCSID("$OpenBSD$"); */
   
 #ifndef CHANNELS_H  #ifndef CHANNELS_H
 #define CHANNELS_H  #define CHANNELS_H
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 #define SSH_CHANNEL_INPUT_DRAINING      8       /* sending remaining data to conn */  #define SSH_CHANNEL_INPUT_DRAINING      8       /* sending remaining data to conn */
 #define SSH_CHANNEL_OUTPUT_DRAINING     9       /* sending remaining data to app */  #define SSH_CHANNEL_OUTPUT_DRAINING     9       /* sending remaining data to app */
 #define SSH_CHANNEL_LARVAL              10      /* larval session */  #define SSH_CHANNEL_LARVAL              10      /* larval session */
 #define SSH_CHANNEL_MAX_TYPE            11  #define SSH_CHANNEL_RPORT_LISTENER      11      /* Listening to a R-style port  */
   #define SSH_CHANNEL_CONNECTING          12
   #define SSH_CHANNEL_MAX_TYPE            13
   
 /*  /*
  * Data structure for channel data.  This is iniailized in channel_allocate   * Data structure for channel data.  This is iniailized in channel_allocate
  * and cleared in channel_free.   * and cleared in channel_free.
  */   */
   struct Channel;
   typedef struct Channel Channel;
   
 typedef void channel_callback_fn(int id, void *arg);  typedef void channel_callback_fn(int id, void *arg);
   typedef int channel_filter_fn(struct Channel *c, char *buf, int len);
   
 typedef struct Channel {  struct Channel {
         int     type;           /* channel type/state */          int     type;           /* channel type/state */
         int     self;           /* my own channel identifier */          int     self;           /* my own channel identifier */
         int     remote_id;      /* channel identifier for remote peer */          int     remote_id;      /* channel identifier for remote peer */
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         int     wfd;            /* write fd */          int     wfd;            /* write fd */
         int     efd;            /* extended fd */          int     efd;            /* extended fd */
         int     sock;           /* sock fd */          int     sock;           /* sock fd */
           int     isatty;         /* rfd is a tty */
         Buffer  input;          /* data read from socket, to be sent over          Buffer  input;          /* data read from socket, to be sent over
                                  * encrypted connection */                                   * encrypted connection */
         Buffer  output;         /* data received over encrypted connection for          Buffer  output;         /* data received over encrypted connection for
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         void    *cb_arg;          void    *cb_arg;
         int     cb_event;          int     cb_event;
         channel_callback_fn     *dettach_user;          channel_callback_fn     *dettach_user;
 }       Channel;  
   
           /* filter */
           channel_filter_fn       *input_filter;
   };
   
 #define CHAN_EXTENDED_IGNORE            0  #define CHAN_EXTENDED_IGNORE            0
 #define CHAN_EXTENDED_READ              1  #define CHAN_EXTENDED_READ              1
 #define CHAN_EXTENDED_WRITE             2  #define CHAN_EXTENDED_WRITE             2
   
 void    channel_set_fds(int id, int rfd, int wfd, int efd, int extusage);  /* default window/packet sizes for tcp/x11-fwd-channel */
   #define CHAN_SES_WINDOW_DEFAULT (32*1024)
   #define CHAN_SES_PACKET_DEFAULT (CHAN_SES_WINDOW_DEFAULT/2)
   #define CHAN_TCP_WINDOW_DEFAULT (32*1024)
   #define CHAN_TCP_PACKET_DEFAULT (CHAN_TCP_WINDOW_DEFAULT/2)
   #define CHAN_X11_WINDOW_DEFAULT (4*1024)
   #define CHAN_X11_PACKET_DEFAULT (CHAN_X11_WINDOW_DEFAULT/2)
   
   
 void    channel_open(int id);  void    channel_open(int id);
 void    channel_request(int id, char *service, int wantconfirm);  void    channel_request(int id, char *service, int wantconfirm);
 void    channel_request_start(int id, char *service, int wantconfirm);  void    channel_request_start(int id, char *service, int wantconfirm);
 void    channel_register_callback(int id, int mtype, channel_callback_fn *fn, void *arg);  void    channel_register_callback(int id, int mtype, channel_callback_fn *fn, void *arg);
 void    channel_register_cleanup(int id, channel_callback_fn *fn);  void    channel_register_cleanup(int id, channel_callback_fn *fn);
   void    channel_register_filter(int id, channel_filter_fn *fn);
 void    channel_cancel_cleanup(int id);  void    channel_cancel_cleanup(int id);
 Channel *channel_lookup(int id);  Channel *channel_lookup(int id);
   
 int  int
 channel_new(char *ctype, int type, int rfd, int wfd, int efd,  channel_new(char *ctype, int type, int rfd, int wfd, int efd,
     int window, int maxpack, int extended_usage, char *remote_name);      int window, int maxpack, int extended_usage, char *remote_name,
       int nonblock);
   void
   channel_set_fds(int id, int rfd, int wfd, int efd,
       int extusage, int nonblock);
   
 void    channel_input_channel_request(int type, int plen);  void    deny_input_open(int type, int plen, void *ctxt);
 void    channel_input_close(int type, int plen);  
 void    channel_input_close_confirmation(int type, int plen);  
 void    channel_input_data(int type, int plen);  
 void    channel_input_extended_data(int type, int plen);  
 void    channel_input_ieof(int type, int plen);  
 void    channel_input_oclose(int type, int plen);  
 void    channel_input_open_confirmation(int type, int plen);  
 void    channel_input_open_failure(int type, int plen);  
 void    channel_input_port_open(int type, int plen);  
 void    channel_input_window_adjust(int type, int plen);  
 void    channel_input_open(int type, int plen);  
   
   void    channel_input_channel_request(int type, int plen, void *ctxt);
   void    channel_input_close(int type, int plen, void *ctxt);
   void    channel_input_close_confirmation(int type, int plen, void *ctxt);
   void    channel_input_data(int type, int plen, void *ctxt);
   void    channel_input_extended_data(int type, int plen, void *ctxt);
   void    channel_input_ieof(int type, int plen, void *ctxt);
   void    channel_input_oclose(int type, int plen, void *ctxt);
   void    channel_input_open_confirmation(int type, int plen, void *ctxt);
   void    channel_input_open_failure(int type, int plen, void *ctxt);
   void    channel_input_port_open(int type, int plen, void *ctxt);
   void    channel_input_window_adjust(int type, int plen, void *ctxt);
   
 /* Sets specific protocol options. */  /* Sets specific protocol options. */
 void    channel_set_options(int hostname_in_open);  void    channel_set_options(int hostname_in_open);
   
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 /* Free the channel and close its socket. */  /* Free the channel and close its socket. */
 void    channel_free(int channel);  void    channel_free(int channel);
   
 /* Add any bits relevant to channels in select bitmasks. */  /*
 void    channel_prepare_select(fd_set * readset, fd_set * writeset);   * Allocate/update select bitmasks and add any bits relevant to channels in
    * select bitmasks.
    */
   void
   channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp);
   
 /*  /*
  * After select, perform any appropriate operations for channels which have   * After select, perform any appropriate operations for channels which have
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  */   */
 void    channel_close_all(void);  void    channel_close_all(void);
   
 /* Returns the maximum file descriptor number used by the channels. */  
 int     channel_max_fd(void);  
   
 /* Returns true if there is still an open channel over the connection. */  /* Returns true if there is still an open channel over the connection. */
 int     channel_still_open(void);  int     channel_still_open(void);
   
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 /*  /*
  * Initiate forwarding of connections to local port "port" through the secure   * Initiate forwarding of connections to local port "port" through the secure
  * channel to host:port from remote side.  This never returns if there was an   * channel to host:port from remote side.
  * error.  
  */   */
 void  int
 channel_request_local_forwarding(u_short port, const char *host,  channel_request_local_forwarding(u_short listen_port,
     u_short remote_port, int gateway_ports);      const char *host_to_connect, u_short port_to_connect, int gateway_ports);
   int
   channel_request_forwarding(const char *listen_address, u_short listen_port,
       const char *host_to_connect, u_short port_to_connect, int gateway_ports,
       int remote_fwd);
   
 /*  /*
  * Initiate forwarding of connections to port "port" on remote host through   * Initiate forwarding of connections to port "port" on remote host through
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  * the remote channel number.  We should do whatever we want, and respond   * the remote channel number.  We should do whatever we want, and respond
  * with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.   * with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.
  */   */
 void    x11_input_open(int type, int plen);  void    x11_input_open(int type, int plen, void *ctxt);
   
 /*  /*
  * Requests forwarding of X11 connections.  This should be called on the   * Requests forwarding of X11 connections.  This should be called on the
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 char   *auth_get_socket_name(void);  char   *auth_get_socket_name(void);
   
 /*  /*
  * This if called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.   * This is called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
  * This starts forwarding authentication requests.   * This starts forwarding authentication requests.
  */   */
 void    auth_input_request_forwarding(struct passwd * pw);  int     auth_input_request_forwarding(struct passwd * pw);
   
 /* This is called to process an SSH_SMSG_AGENT_OPEN message. */  /* This is called to process an SSH_SMSG_AGENT_OPEN message. */
 void    auth_input_open_request(int type, int plen);  void    auth_input_open_request(int type, int plen, void *ctxt);
   
 /* XXX */  /* XXX */
 int     channel_connect_to(const char *host, u_short host_port);  int     channel_connect_to(const char *host, u_short host_port);
   int     channel_connect_by_listen_adress(u_short listen_port);
 int     x11_connect_display(void);  int     x11_connect_display(void);
   
 #endif  #endif
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