draft-ietf-tcpm-2140bis-02.txt   draft-ietf-tcpm-2140bis-03.txt 
TCPM WG J. Touch TCPM WG J. Touch
Internet Draft Independent Internet Draft Independent
Intended status: Informational M. Welzl Intended status: Informational M. Welzl
Obsoletes: 2140 S. Islam Obsoletes: 2140 S. Islam
Expires: August 2020 University of Oslo Expires: October 2020 University of Oslo
February 28, 2020 April 24, 2020
TCP Control Block Interdependence TCP Control Block Interdependence
draft-ietf-tcpm-2140bis-02.txt draft-ietf-tcpm-2140bis-03.txt
Status of this Memo Status of this Memo
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months and may be updated, replaced, or obsoleted by other documents months and may be updated, replaced, or obsoleted by other documents
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This Internet-Draft will expire on August 28, 2020. This Internet-Draft will expire on October 24, 2020.
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Table of Contents Table of Contents
1. Introduction...................................................3 1. Introduction...................................................3
2. Conventions Used in This Document..............................4 2. Conventions Used in This Document..............................4
3. Terminology....................................................4 3. Terminology....................................................4
4. The TCP Control Block (TCB)....................................4 4. The TCP Control Block (TCB)....................................4
5. TCB Interdependence............................................5 5. TCB Interdependence............................................5
6. Temporal Sharing...............................................6 6. Temporal Sharing...............................................6
6.1. Initialization of the new TCB................................6 6.1. Initialization of the new TCB................................6
6.2. Updates to the new TCP.......................................7 6.2. Updates to the new TCB.......................................7
6.3. Discussion...................................................8 6.3. Discussion...................................................8
7. Ensemble Sharing...............................................9 7. Ensemble Sharing...............................................9
7.1. Initialization of a new TCB..................................9 7.1. Initialization of a new TCB..................................9
7.2. Updates to the new TCB......................................10 7.2. Updates to the new TCB......................................10
7.3. Discussion..................................................11 7.3. Discussion..................................................11
8. Compatibility Issues..........................................12 8. Compatibility Issues..........................................12
8.1. Traversing the same network path............................13 8.1. Traversing the same network path............................13
8.2. State dependence............................................13 8.2. State dependence............................................13
8.3. Problems with IP sharing....................................14 8.3. Problems with IP sharing....................................14
9. Implications..................................................14 9. Implications..................................................14
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options and sharing is provided in 0. options and sharing is provided in 0.
TEMPORAL SHARING - Option Info Initialization TEMPORAL SHARING - Option Info Initialization
Cached New Cached New
---------------------------------------- ----------------------------------------
old_TFO_Cookie old_TFO_Cookie old_TFO_Cookie old_TFO_Cookie
old_TFO_Failure old_TFO_Failure old_TFO_Failure old_TFO_Failure
6.2. Updates to the new TCP 6.2. Updates to the new TCB
During the connection, the associated TCB can be updated based on During the connection, the associated TCB can be updated based on
particular events, as shown below: particular events, as shown below:
TEMPORAL SHARING - Cache Updates TEMPORAL SHARING - Cache Updates
Cached TCB Current TCB when? New Cached TCB Cached TCB Current TCB when? New Cached TCB
------------------------------------------------------ ------------------------------------------------------
old_MMS_S curr_ MMS_S OPEN curr MMS_S old_MMS_S curr_ MMS_S OPEN curr MMS_S
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MD5 MD5
TCP-AO TCP-AO
EXP1 EXP1
EXP2 EXP2
Unsafe to keep state: Unsafe to keep state:
Skeeter (DH exchange - might be obsolete, though) Skeeter (DH exchange, known to be vulnerable)
Bubba (DH exchange - might really be obsolete, though) Bubba (DH exchange, known to be vulnerable)
Trailer CS Trailer CS
SCPS capabilities SCPS capabilities
S-NACK S-NACK
Records boundaries Records boundaries
Corruption experienced Corruption experienced
SNAP SNAP
TCP Compression TCP Compression
Quickstart response Quickstart response
UTO UTO
MPTCP (can we cache when this fails?) MPTCP negotiation success (see below for negotiation failure)
TFO success TFO negotiation success (see below for negotiation failure)
Safe but optional to keep state: Safe but optional to keep state:
MPTCP negotiation failure (to avoid negotiation retries)
MSS MSS
TFO failure (so we don't try again, since it's optional) TFO negotiation failure (to avoid negotiation retries)
Safe and necessary to keep state: Safe and necessary to keep state:
TFP cookie (if TFO succeeded in the past) TFP cookie (if TFO succeeded in the past)
Appendix C: Automating the Initial Window in TCP over Long Timescales Appendix C: Automating the Initial Window in TCP over Long Timescales
Note: this section is taken verbatim from [To12], updated to refer Note: this section is taken verbatim from [To12], updated to refer
to itself as an appendix. to itself as an appendix.
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