src/usr.bin/ssh/nchan.ms - diff

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-version 1.1, 1999/10/17 16:56:09
+version 1.2, 1999/10/25 21:05:20
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  ellipse wid .9*ellipsewid ht .9*ellipseht at S4
  arrow "start" "" from S1.w+(-0.5,0) to S1.w
  .PE
+ .SH
+ Notes
+ .PP
+ The input buffer is filled with data from the socket
+ (the socket represents the local comsumer/producer of the
+ forwarded channel).
+ The data is then sent over the INPUT-end of the channel to the
+ remote peer.
+ Data sent by the peer is received on the OUTPUT-end,
+ saved in the output buffer and written to the socket.
+ .PP
+ If the local protocol instance has forwarded all data on the
+ INPUT-end of the channel, it sends an IEOF message to the peer.
+ If the peer receives the IEOF and has comsumed all
+ data he replies with an OCLOSE.
+ When the local instance receives the OCLOSE
+ he considers the INPUT-half of the channel closed.
+ The peer has his OUTOUT-half closed.
+ .PP
+ A channel can be deallocated by a protocol instance
+ if both the INPUT- and the OUTOUT-half on his
+ side of the channel are closed.
+ Note that when an instance is unable to comsume the
+ received data, he is permitted to send an OCLOSE
+ before the matching IEOF is received.