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- Network Working Group 25 January 1972
- RFC 294 Abhay Bhushan, MIT
- NIC 8304
- Categories: D.4, D.5, and D.7
- Updates: RFC 265
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- The Use of 'Set Data Type' Transaction in File Transfer Protocol
- ----------------------------------------------------------------
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- 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.
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- 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.
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- The 'set data type' transaction preceding a retrieve request
- should be interpreted by a server to mean that the user wants to
- receive his data in that form. If the server is unable to convert the
- data into the desired form, it should return a 'set data type' of
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- [ 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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- [Page 1]
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- Network Working Group 25 January 1972
- RFC 294 Abhay Bhushan, MIT
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- The following examples should clarify the use of 'set data
- type' transactions.
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- 1. USER SERVER
- ---- ------
- Set data type '02' (Network ASCII)
- ------------------------------------->
- Store File X
- ------------------------------------->
- File X (in Network ASCII)
- ------------------------------------->
- End of File
- ------------------------------------->
- Acknowledge
- <-------------------------------------
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- Retrieve File X
- ------------------------------------->
- File X in Network ASCII
- <-------------------------------------
- End of File
- <-------------------------------------
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- 2. USER SERVER
- ---- ------
- Set data type'03' (EBCDIC)
- ------------------------------------->
- Retrieve File Y
- ------------------------------------->
- Set data type '00' ("bit-stream")
- <-------------------------------------
- File Y as stored (no conversion)
- <-------------------------------------
- End of File
- <-------------------------------------
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- Set data type '02' (Network ASCII)
- ------------------------------------->
- Retrieve File Z
- ------------------------------------->
- File Z in Network ASCII
- <-------------------------------------
- End of File
- <-------------------------------------
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- [Page 2]
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