| /* |
| * 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. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by Markus Friedl. |
| * 4. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * 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 1.8 2000/06/20 01:39:43 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; |
| |
| extern chan_event_fn *chan_delete_if_full_closed; |
| |
| void chan_init_iostates(Channel * c); |
| void chan_init(void); |
| #endif |
