зеркало из https://github.com/Azure/sonic-openssh.git
58 строки
1.5 KiB
C
58 строки
1.5 KiB
C
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/* RCSID("$Id: nchan.h,v 1.1 1999/10/27 03:42:44 damien Exp $"); */
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#ifndef NCHAN_H
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#define NCHAN_H
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/*
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* SSH Protocol 1.5 aka New Channel Protocol
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* Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored.
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* Written by Markus Friedl in October 1999
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*
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* Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the
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* tear down of channels:
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*
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* 1.3: strict request-ack-protocol:
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* CLOSE ->
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* <- CLOSE_CONFIRM
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*
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* 1.5: uses variations of:
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* IEOF ->
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* <- OCLOSE
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* <- IEOF
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* OCLOSE ->
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* i.e. both sides have to close the channel
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*
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* See the debugging output from 'ssh -v' and 'sshd -d' of
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* ssh-1.2.27 as an example.
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*
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*/
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/* ssh-proto-1.5 overloads prot-1.3-message-types */
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#define SSH_MSG_CHANNEL_INPUT_EOF SSH_MSG_CHANNEL_CLOSE
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#define SSH_MSG_CHANNEL_OUTPUT_CLOSE SSH_MSG_CHANNEL_CLOSE_CONFIRMATION
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/* possible input states */
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#define CHAN_INPUT_OPEN 0x01
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#define CHAN_INPUT_WAIT_DRAIN 0x02
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#define CHAN_INPUT_WAIT_OCLOSE 0x04
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#define CHAN_INPUT_CLOSED 0x08
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/* possible output states */
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#define CHAN_OUTPUT_OPEN 0x10
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#define CHAN_OUTPUT_WAIT_DRAIN 0x20
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#define CHAN_OUTPUT_WAIT_IEOF 0x40
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#define CHAN_OUTPUT_CLOSED 0x80
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/* EVENTS for the input state */
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void chan_rcvd_oclose(Channel *c);
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void chan_read_failed(Channel *c);
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void chan_ibuf_empty(Channel *c);
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/* EVENTS for the output state */
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void chan_rcvd_ieof(Channel *c);
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void chan_write_failed(Channel *c);
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void chan_obuf_empty(Channel *c);
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void chan_init_iostates(Channel *c);
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#endif
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