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Annotation of src/usr.bin/ssh/nchan2.ms, Revision 1.1

1.1     ! markus      1: .TL
        !             2: OpenSSH Channel Close Protocol 2.0 Implementation
        !             3: .SH
        !             4: Channel Input State Diagram
        !             5: .PS
        !             6: reset
        !             7: l=1
        !             8: s=1.2
        !             9: ellipsewid=s*ellipsewid
        !            10: boxwid=s*boxwid
        !            11: ellipseht=s*ellipseht
        !            12: S1: ellipse "INPUT" "OPEN"
        !            13: move right 2*l from last ellipse.e
        !            14: S3: ellipse invis
        !            15: move down l from last ellipse.s
        !            16: S4: ellipse "INPUT" "CLOSED"
        !            17: move down l from 1st ellipse.s
        !            18: S2: ellipse "INPUT" "WAIT" "DRAIN"
        !            19: arrow from S1.e to S4.n
        !            20: box invis "rcvd CLOSE/" "shutdown_read" with .sw at last arrow.c
        !            21: arrow "ibuf_empty ||" "rcvd CLOSE/" "send EOF" "" from S2.e to S4.w
        !            22: arrow from S1.s to S2.n
        !            23: box invis "read_failed/" "shutdown_read" with .e at last arrow.c
        !            24: ellipse wid .9*ellipsewid ht .9*ellipseht at S4
        !            25: arrow "start" "" from S1.w+(-0.5,0) to S1.w
        !            26: .PE
        !            27: .SH
        !            28: Channel Output State Diagram
        !            29: .PS
        !            30: S1: ellipse "OUTPUT" "OPEN"
        !            31: move right 2*l from last ellipse.e
        !            32: S3: ellipse invis
        !            33: move down l from last ellipse.s
        !            34: S4: ellipse "OUTPUT" "CLOSED"
        !            35: move down l from 1st ellipse.s
        !            36: S2: ellipse "OUTPUT" "WAIT" "DRAIN"
        !            37: arrow from S1.e to S4.n
        !            38: box invis "write_failed/" "shutdown_write" with .sw at last arrow.c
        !            39: arrow "obuf_empty ||" "write_failed/" "shutdown_write" "" from S2.e to S4.w
        !            40: arrow from S1.s to S2.n
        !            41: box invis "rcvd EOF ||" "rcvd CLOSE/" "-" with .e at last arrow.c
        !            42: ellipse wid .9*ellipsewid ht .9*ellipseht at S4
        !            43: arrow "start" "" from S1.w+(-0.5,0) to S1.w
        !            44: .PE
        !            45: .SH
        !            46: Notes
        !            47: .PP
        !            48: The input buffer is filled with data from the socket
        !            49: (the socket represents the local consumer/producer of the
        !            50: forwarded channel).
        !            51: The data is then sent over the INPUT-end (transmit-end) of the channel to the
        !            52: remote peer.
        !            53: Data sent by the peer is received on the OUTPUT-end (receive-end),
        !            54: saved in the output buffer and written to the socket.
        !            55: .PP
        !            56: If the local protocol instance has forwarded all data on the
        !            57: INPUT-end of the channel, it sends an EOF message to the peer.
        !            58: .PP
        !            59: A CLOSE message is sent to the peer if
        !            60: both the INPUT- and the OUTOUT-half of the local
        !            61: end of the channel are closed.
        !            62: .PP
        !            63: The channel can be deallocated by a protocol instance
        !            64: if a CLOSE message he been both sent and received.