зеркало из https://github.com/Azure/sonic-openssh.git
92 строки
3.0 KiB
C
92 строки
3.0 KiB
C
/*
|
|
* Copyright (c) 1999 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: nchan.h,v 1.10 2001/02/28 08:54:55 markus Exp $"); */
|
|
|
|
#ifndef NCHAN_H
|
|
#define NCHAN_H
|
|
|
|
/*
|
|
* SSH Protocol 1.5 aka New Channel Protocol
|
|
* Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored.
|
|
* Written by Markus Friedl in October 1999
|
|
*
|
|
* Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the
|
|
* tear down of channels:
|
|
*
|
|
* 1.3: strict request-ack-protocol:
|
|
* CLOSE ->
|
|
* <- CLOSE_CONFIRM
|
|
*
|
|
* 1.5: uses variations of:
|
|
* IEOF ->
|
|
* <- OCLOSE
|
|
* <- IEOF
|
|
* OCLOSE ->
|
|
* i.e. both sides have to close the channel
|
|
*
|
|
* See the debugging output from 'ssh -v' and 'sshd -d' of
|
|
* ssh-1.2.27 as an example.
|
|
*
|
|
*/
|
|
|
|
/* ssh-proto-1.5 overloads prot-1.3-message-types */
|
|
#define SSH_MSG_CHANNEL_INPUT_EOF SSH_MSG_CHANNEL_CLOSE
|
|
#define SSH_MSG_CHANNEL_OUTPUT_CLOSE SSH_MSG_CHANNEL_CLOSE_CONFIRMATION
|
|
|
|
/* possible input states */
|
|
#define CHAN_INPUT_OPEN 0x01
|
|
#define CHAN_INPUT_WAIT_DRAIN 0x02
|
|
#define CHAN_INPUT_WAIT_OCLOSE 0x04
|
|
#define CHAN_INPUT_CLOSED 0x08
|
|
|
|
/* possible output states */
|
|
#define CHAN_OUTPUT_OPEN 0x10
|
|
#define CHAN_OUTPUT_WAIT_DRAIN 0x20
|
|
#define CHAN_OUTPUT_WAIT_IEOF 0x40
|
|
#define CHAN_OUTPUT_CLOSED 0x80
|
|
|
|
#define CHAN_CLOSE_SENT 0x01
|
|
#define CHAN_CLOSE_RCVD 0x02
|
|
|
|
|
|
/* Channel EVENTS */
|
|
typedef void chan_event_fn(Channel * c);
|
|
|
|
/* for the input state */
|
|
extern chan_event_fn *chan_rcvd_oclose;
|
|
extern chan_event_fn *chan_read_failed;
|
|
extern chan_event_fn *chan_ibuf_empty;
|
|
|
|
/* for the output state */
|
|
extern chan_event_fn *chan_rcvd_ieof;
|
|
extern chan_event_fn *chan_write_failed;
|
|
extern chan_event_fn *chan_obuf_empty;
|
|
|
|
int chan_is_dead(Channel * c);
|
|
|
|
void chan_init_iostates(Channel * c);
|
|
void chan_init(void);
|
|
#endif
|