net: ipv6: Add support for stable IID addresses #80575
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This implements support for RFC 7217 which describes a method to have stable IPv6 Interface Identifiers to be used with IPv6 Stateless Address Autoconfiguration (SLAAC). The stable IIDs are used to provide enhanced privacy so that an IPv6 address configured using this method is stable within each subnet, but the corresponding Interface Identifier changes when the host moves from one network to another. This method is meant to be an alternative to generating Interface Identifiers based on hardware (MAC) addresses, such that the benefits of stable addresses can be achieved without sacrificing the security and privacy of users. Signed-off-by: Jukka Rissanen <[email protected]>
Add tests that verify that stable IIDs generate a proper IPv6 interface identifier described in RFC 7217. Signed-off-by: Jukka Rissanen <[email protected]>
Print information in "net ipv6" command how the SLAAC addresses are generated. There is the default legacy EUI-64 method (RFC 4862) or the stable method described in RFC 7217. Signed-off-by: Jukka Rissanen <[email protected]>
The short sleep (10ms) was not enough any more. Increase the sleep to 100ms so that system stabilizes between checks. Signed-off-by: Jukka Rissanen <[email protected]>
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This implements support for RFC 7217 which describes a method to have stable IPv6 Interface Identifiers to be used with IPv6 Stateless Address Autoconfiguration (SLAAC). The stable IIDs are used to provide enhanced privacy so that an IPv6 address configured using this method is stable within each subnet, but the corresponding Interface Identifier changes when the host moves from one network to another. This method is meant to be an alternative to generating Interface Identifiers based on hardware (MAC) addresses, such that the benefits of stable addresses can be achieved without sacrificing the security and privacy of users.
https://www.rfc-editor.org/rfc/rfc7217