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Network Working Group RFC 294 NIC 8304 Categories: D.4, D.5, and D.7 Updates: RFC 265

25 January 1972 Abhay Bhushan, MIT

The Use of 'Set Data Type' Transaction in File Transfer Protocol ----------------------------------------------------------------

As mentioned in RFC 265, the opcode of '00' is set aside for the clarify the use of 'set data type' in file transfer operations.

In many systems such as Multics at MIT, there is no provision to identify the type of data (i.e., ASCII or numeric) stored in files. The manner in which the data is handled is context dependent. ASCII characters are stored as four 9-bit characters per 36-bit word, right justified with left most bit as zero. As efficient conversion programs exists in Multics for conversion of data from Multics' ASCII into Network ASCII, it would be useful for a user to be able to instruct the Multics server to convert data into Network ASCII in retrieve operations. It is suggested that the 'set data type' transaction be used for this purpose.

The 'set data type' transaction preceding should be interpreted by a server to mean that receive his data in that form. If the server data into the desired form, it should return a

a retrieve the user is unable 'set data

request wants to to convert the type' of

[ This RFC was put into machine readable form for entry ] [ into the online RFC archives by BBN Corp. under the ] [ direction of Alex McKenzie. 12/96 ]

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Network Working Group RFC 294

25 January 1972 Abhay Bhushan, MIT

The following examples should clarify the use of 'set data type' transactions. 1. USER ---Set data type '02' (Network ASCII) -------------------------------------> Store File X -------------------------------------> File X (in Network ASCII) -------------------------------------> End of File -------------------------------------> Acknowledge <------------------------------------Retrieve File X -------------------------------------> File X in Network ASCII <------------------------------------End of File <------------------------------------2. USER ---Set data type'03' (EBCDIC) -------------------------------------> Retrieve File Y -------------------------------------> Set data type '00' ("bit-stream") <------------------------------------File Y as stored (no conversion) <------------------------------------End of File <------------------------------------Set data type '02' (Network ASCII) -------------------------------------> Retrieve File Z -------------------------------------> File Z in Network ASCII <------------------------------------End of File <------------------------------------SERVER -----SERVER ------

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