Enables handling the Hop by Hop and Destination Options extension
headers, but options are not yet supported. All options will be
treated as unknown and their respective action will be followed.
Note, the stack does not yet support sending ICMPv6 error messages in
response to options that cannot be handled/parsed. That will come
in a later change (Issue #2211).
Tests:
- header_test.TestIPv6UnknownExtHdrOption
- header_test.TestIPv6OptionsExtHdrIterErr
- header_test.TestIPv6OptionsExtHdrIter
- ipv6_test.TestReceiveIPv6ExtHdrs
PiperOrigin-RevId: 303433085
2a4aff7f7e