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Task #1253

closed

Scope control for /localhop Interests

Added by Junxiao Shi over 10 years ago. Updated over 10 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Category:
Forwarding
Target version:
Start date:
03/13/2014
Due date:
% Done:

100%

Estimated time:
4.00 h

Description

Develop a mechanism to restrict the propagation of Interests under /localhop namespace.

Rules

  • Interest under /localhop can come from a local app or a remote host.
  • If PIT entry under /localhop has at least one InRecord from a local app, it can be forwarded to local apps and remote hosts.
  • If PIT entry under /localhop has all InRecords from remote hosts, it can only be forwarded to local apps.
  • PIT entry under /localhop can be satisfied by Data from any source.

Breakdown

Face should have a property to tell whether it represents a local app.

PIT entry should have a method to tell whether at least one InRecord is from a local app.

Outgoing Interest pipeline should enforce the rules to restrict Interest propagation.

Strategy may understand this scope and make smart forwarding decision.


Related issues 2 (0 open2 closed)

Blocks NFD - Task #1294: autoconfig: discover NDN routerClosedAlex Afanasyev01/31/2014

Actions
Blocked by NFD - Task #1345: Refine forwarding pipelinesClosedJunxiao Shi

Actions
Actions #1

Updated by Junxiao Shi over 10 years ago

  • Subject changed from Scope control for /locallink Interests to Scope control for /link-local Interests
  • Description updated (diff)
  • Estimated time set to 4.00 h

20140222 conference call decides to change namespace from /locallink to /link-local, which follows convention.

We discussed whether /link-local Interest can propagate to local apps:

  • argument for inclusive scope (/link-local can propagate to local apps): when the consumer sends an Interest, it does not care where the Data comes from.
  • argument for exclusive scope (/link-local can only go to remote nodes): the consumer needs precise control; a local producer might be malicious and is trying to fool the consumer.

No consensus was reached. The current rule is equivalent to CCNx Scope=2 (inclusive scope), and remains unchanged.

Actions #2

Updated by Junxiao Shi over 10 years ago

  • Subject changed from Scope control for /link-local Interests to Scope control for /localhop Interests
  • Description updated (diff)
  • Assignee set to Junxiao Shi

20140223 conference call again changes the namespace to /localhop, because its semantic is different from link-local in IP, so a different name should be used to avoid confusion.

Scope has two distinct meanings:

  • vicinity: Name is relative to some anchor
  • boundary: Data cannot leave a certain area

/localhop takes the first meaning. It only limits Interest propagation.

Actions #3

Updated by Junxiao Shi over 10 years ago

  • Status changed from New to In Progress
  • Start date set to 03/13/2014
Actions #4

Updated by Junxiao Shi over 10 years ago

  • Status changed from In Progress to Code review
  • % Done changed from 0 to 40

I359747688568934070d1583995957835ac690f28

Outgoing Interest pipeline can enforce /localhop scope.

A later commit will make some of the strategies understand this scope.

Actions #5

Updated by Junxiao Shi over 10 years ago

  • Status changed from Code review to In Progress

Pipeline is merged. I'll work on strategies.

Design: PIT entry or strategy base class should have an attribute to determine whether forwarding to outFace would violate scope. Strategies can use this attribute to decide where to forward.

Actions #6

Updated by Junxiao Shi over 10 years ago

  • Status changed from In Progress to Code review
  • % Done changed from 40 to 80

Strategies now understand scope control, and can also avoid forwarding an Interest back to its incoming Face.

Actions #7

Updated by Junxiao Shi over 10 years ago

  • Status changed from Code review to Closed
  • % Done changed from 80 to 100
Actions

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