PrefixAnnouncement » History » Revision 1
Revision 1/10
| Next »
Junxiao Shi, 08/13/2018 05:36 AM
Prefix Announcement Protocol¶
The prefix announcement protocol allows registering prefixes using a prefix announcement object. It is an alternative to NFD RIB Management protocol's rib/register
verb.
Prefix Announcement object¶
The prefix announcement object is a Data packet that represents an application's intent of registering a prefix toward the application. A Data packet that satisfies the following requirements is a prefix announcement object:
- Name starts with the announced prefix, followed by
prefix-announcement
constant component, followed by a version component and a segment component as defined in NDN Naming Convention. - ContentType is "prefix announcement".
- Content contains zero or more TLV elements.
A prefix announcement object, by default, is valid indefinitely. Its validity period can be constrained with ValidityPeriod or FreshnessPeriod element.
- ValidityPeriod gives the absolute time range in which the prefix announcement remains valid. It is ignored if the receiving node does not have a UnixTime clock.
- FreshnessPeriod gives the duration in which the prefix announcement remains valid. The duration begins when a node or program receives the prefix announcement.
- When both ValidityPeriod and FreshnessPeriod are present, the most restricted constraint applies.
Trust model of prefix announcement is to be defined by application.
Command Verbs¶
'announce'¶
This command announces a prefix using a prefix announcement object.
NFD-RIB accepts this command as a Command Interest with the following syntax:
/localhost/nfd/rib/announce/<params-sha256>/<command-interest-components>
/localhop/nfd/rib/announce/<params-sha256>/<command-interest-components>
The Interest's Parameters element carries the prefix announce object.
NFD-RIB converts this command into an equivalent rib/register
command. Route origin is set to "prefix announcement" (number 129).
Response is same as rib/register
command.
'unannounce'¶
There is no 'unannounce' command. Instead, use rib/unregister
command.
Updated by Junxiao Shi over 6 years ago · 10 revisions