Reliable Data Protocol
RFC 908
Document | Type |
RFC - Experimental
(July 1984; No errata)
Updated by RFC 1151
|
|
---|---|---|---|
Last updated | 2013-03-02 | ||
Stream | Legacy | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | Legacy state | (None) | |
Consensus Boilerplate | Unknown | ||
RFC Editor Note | (None) | ||
IESG | IESG state | RFC 908 (Experimental) | |
Telechat date | |||
Responsible AD | (None) | ||
Send notices to | (None) |
Reliable Data Protocol
RFC-908
David Velten
Robert Hinden
Jack Sax
BBN Communications Corporation
July 1984
Status of This Memo
This RFC specifies a proposed protocol for the ARPA Internet
community, and requests discussion and suggestions for
improvements. Distribution of this memo is unlimited.
RDP Specification
Table of Contents
1 Introduction.......................................... 1
2 General Description................................... 3
2.1 Motivation.......................................... 3
2.2 Relation to Other Protocols......................... 5
3 Protocol Operation.................................... 7
3.1 Protocol Service Objectives......................... 7
3.2 RDP Connection Management........................... 7
3.2.1 Opening a Connection.............................. 8
3.2.2 Ports............................................. 8
3.2.3 Connection States................................. 8
3.2.4 Connection Record................................ 11
3.2.5 Closing a Connection............................. 13
3.2.6 Detecting an Half-Open Connection................ 14
3.3 Data Communication................................. 14
3.4 Reliable Communication............................. 15
3.4.1 Segment Sequence Numbers......................... 15
3.4.2 Checksums........................................ 16
3.4.3 Positive Acknowledgement of Segments............. 16
3.4.4 Retransmission Timeout........................... 17
3.5 Flow Control and Window Management................. 17
3.6 User Interface..................................... 19
3.7 Event Processing................................... 20
3.7.1 User Request Events.............................. 21
3.7.2 Segment Arrival Events........................... 24
3.7.3 Timeout Events................................... 29
4 RDP Segments and Formats............................. 31
4.1 IP Header Format................................... 31
4.2 RDP Header Format.................................. 32
4.2.1 RDP Header Fields................................ 33
4.3 SYN Segment........................................ 36
4.3.1 SYN Segment Format............................... 36
4.3.2 SYN Segment Fields............................... 37
4.4 ACK Segment........................................ 38
4.4.1 ACK Segment Format............................... 38
4.4.2 ACK Segment Fields............................... 39
4.5 Extended ACK Segment............................... 40
4.5.1 EACK Segment Format.............................. 40
4.5.2 EACK Segment Fields.............................. 40
Page i
RFC-908 July 1984
4.6 RST Segment........................................ 42
4.6.1 RST Segment Format............................... 42
4.7 NUL Segment........................................ 43
4.7.1 NUL segment format............................... 43
5 Examples of Operation................................ 45
5.1 Connection Establishment........................... 45
5.2 Simultaneous Connection Establishment.............. 46
5.3 Lost Segments...................................... 47
5.4 Segments Received Out of Order..................... 48
5.5 Communication Over Long Delay Path................. 49
5.6 Communication Over Long Delay Path With Lost
Segments
.................................................... 50
5.7 Detecting a Half-Open Connection on Crash
Recovery
.................................................... 51
5.8 Detecting a Half-Open Connection from the
Active Side
.................................................... 52
A Implementing a Minimal RDP........................... 53
Page ii
RDP Specification
FIGURES
1 Relation to Other Protocols............................ 5
2 Form of Data Exchange Between Layers................... 6
3 RDP Connection State Diagram.......................... 10
4 Segment Format........................................ 31
5 RDP Header Format..................................... 32
6 SYN Segment Format.................................... 37
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