[Info-vax] yet another sys$qiow question

[Johnny Billquist]

On 2015-08-12 21:40, Jan-Erik Soderholm wrote:
> Den 2015-08-12 kl. 21:23, skrev Johnny Billquist:
>> On 2015-08-12 10:12, Jan-Erik Soderholm wrote:
>>> Den 2015-08-12 kl. 01:53, skrev Johnny Billquist:
>>>> On 2015-08-12 00:38, kc at kayceesoftware.com wrote:
>>>>> this is slightly related issue only as it pertains to the same serial
>>>>> comm to a card reader.
>>>>> to refresh: vms 8.4 IA64, tcpip 5.7 ECO 5, C 7.3-018
>>>>> sys$qiow working fine now and seems very stable, my problem was
>>>>> getting
>>>>> the terminator mask correct.
>>>>>
>>>>> I've been reading on sockets and will be converting to that mode soon
>>>>> for
>>>>> another project and probably change this serial code at that point.
>>>>>
>>>>> BUT, in researching a very random NAK of my comm, i've found that the
>>>>> CRC
>>>>> sometimes calcs a line feed (LF, ox0a), and the stored string shows
>>>>> ONLY
>>>>> the LF i put in it....but the message that ends up at the card reader
>>>>> has
>>>>> CRLF, which is then rejected as invalid.
>>>>>
>>>>> The terminal port (TNA1) is set pasthru, the VMS IO Ref Manual says
>>>>> IO$M_NOFORMAT and TT2$M_PASTHRU are basically the same.
>>>>>
>>>>> So, is it the TT driver, or tcp, or something else converting the
>>>>> LF to
>>>>> CRLF?
>>>>
>>>> While I cannot answer, I should repeat what I pointed out before. The
>>>> "telnet" protocol is really just a TCP stream, with a couple of things
>>>> thrown in.
>>>
>>> You can use TNA ports/devices without using the telnet protocol.
>>> Just use /prot=none.
>>
>> Do you have any specific information what that implies?
>
> I do not have anything more then online HELP and the TCPIP
> user manual (same text at both sources) :
>
> TELNET> help create /protocol
>
> CREATE_SESSION
>
>    /PROTOCOL
>
>          /PROTOCOL=options
>
>       Optional. Default: NONE. Options include:
>
>       o  NONE
>
>          Data is sent with no interpretation (raw).
>
>       o  NVT
>
>          Network Virtual Terminal (NVT), TELNET's internal
>          representation of a standard network terminal. NVT format
>          is standard 7-bit ASCII code transmitted in 8-bit octets, the
>          canonical form of data representation used by both the client
>          and server.
>
>       o  TELNET
>
>          Standard TELNET protocol.
>
>       o  RLOGIN
>
>          Standard RLOGIN protocol.
>
>
>
> Topic?
>
>
> And I also know from 15 years of setting this up for equipment,
> that *nothing* apart from what we write to the TNAxxx devices
> in the QIO(W) is actualy sent on the line.

Thanks for that info. While not definitive, it do sound as if perhaps 
NONE really means none. That still leaves a lot of question marks, 
though. So I'd still recommend tcpdump to find out what actually goes 
over the net.

(And the "telnet protocol" is such a broken term... :-/ )

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol