channels.h

   1 /* RCSID("$Id$"); */
   2
   3 #ifndef CHANNELS_H
   4 #define CHANNELS_H
   5
   6 /* Definitions for channel types. */
   7 #define SSH_CHANNEL_FREE                0       /* This channel is free
   8                                                  * (unused). */
   9 #define SSH_CHANNEL_X11_LISTENER        1       /* Listening for inet X11
  10                                                  * conn. */
  11 #define SSH_CHANNEL_PORT_LISTENER       2       /* Listening on a port. */
  12 #define SSH_CHANNEL_OPENING             3       /* waiting for confirmation */
  13 #define SSH_CHANNEL_OPEN                4       /* normal open two-way channel */
  14 #define SSH_CHANNEL_CLOSED              5       /* waiting for close
  15                                                  * confirmation */
  16 /*      SSH_CHANNEL_AUTH_FD             6    authentication fd */
  17 #define SSH_CHANNEL_AUTH_SOCKET         7       /* authentication socket */
  18 /*      SSH_CHANNEL_AUTH_SOCKET_FD      8    connection to auth socket */
  19 #define SSH_CHANNEL_X11_OPEN            9       /* reading first X11 packet */
  20 #define SSH_CHANNEL_INPUT_DRAINING      10      /* sending remaining data to
  21                                                  * conn */
  22 #define SSH_CHANNEL_OUTPUT_DRAINING     11      /* sending remaining data to
  23                                                  * app */
  24
  25 /* Data structure for channel data.  This is iniailized in channel_allocate
  26    and cleared in channel_free. */
  27
  28 typedef struct Channel {
  29         int     type;           /* channel type/state */
  30         int     self;           /* my own channel identifier */
  31         int     remote_id;      /* channel identifier for remote peer */
  32         /* peer can be reached over encrypted connection, via packet-sent */
  33         int     istate;         /* input from channel (state of receive half) */
  34         int     ostate;         /* output to channel  (state of transmit half) */
  35         int     sock;           /* data socket, linked to this channel */
  36         Buffer  input;          /* data read from socket, to be sent over
  37                                  * encrypted connection */
  38         Buffer  output;         /* data received over encrypted connection for
  39                                  * send on socket */
  40         char    path[200];      /* path for unix domain sockets, or host name
  41                                  * for forwards */
  42         int     listening_port; /* port being listened for forwards */
  43         int     host_port;      /* remote port to connect for forwards */
  44         char   *remote_name;    /* remote hostname */
  45 }       Channel;
  46 #endif