[Ltsp-discuss] Re: Serial port redirection

[Corey Minyard]

Jeffrey Altman wrote:

Peter Astrand wrote:

* ser2net is totally incompatible with cyclades-serial-client. This is
because ser2net interprets RFC2217 a bit differently. sredird sends
command "101" as ack for command "1", while ser2net sends "1". 
RFC2217 is
not very explicit about which way is most correct. The ser2net approach
looks better to me, but the sredird one is probably more widely used
(since Cyclades terminal server uses it, for example.) Probably, RFC2217
software needs to handle both cases.

 

ser2net is wrong


Umm, no.  Cyclades and sredird are wrong.  And it's pretty clear.  From 
RFC2217:

                  Client to Access Server   Access Server to Client
      SIGNATURE            text                      text
      SET-BAUDRATE            1                      101
      SET-DATASIZE            2                      102
      SET-PARITY              3                      103
      SET-STOPSIZE            4                      104
      SET-CONTROL             5                      105
      NOTIFY-LINESTATE        6                      106
      NOTIFY-MODEMSTATE       7                      107
      FLOWCONTROL-SUSPEND     8                      108
      FLOWCONTROL-RESUME      9                      109
      SET-LINESTATE-MASK     10                      110
      SET-MODEMSTATE-MASK    11                      111
      PURGE-DATA             12                      112
                                                                              
  Discussion: As initially proposed, com port configuration
              commands are only sent from the client to the access
              server.  There is no current vision that the access
              server would initiate the use of a com port configuration
              command, only the notify commands. However, to allow for
              access server initiated com port configurations different
              command values have been established.

That last sentence of the discussion says it.  The 1xx commands are 
there to allow the access server to *initiate* com port configuration 
changes.  Not to ack the changes.  Unless you can point me to something 
in the manual to say that I am wrong.

I am willing to change this in the spirit of keeping things consistent, 
though.

-Corey



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