Name: dfR10049 Date: 01/12/2001



isSiteLocalAddress() and isLinkLocalAddress() methods of Inet6Address class
are inconsistent with rfc2373.

rfc2373 states:

2.5.8 Local-Use IPv6 Unicast Addresses
   ...

   Link-Local addresses have the following format:

   | 10 |
   | bits | 54 bits | 64 bits |
   +----------+-------------------------+----------------------------+
   |1111111010| 0 | interface ID |
   +----------+-------------------------+----------------------------+

   ...

   Site-Local addresses have the following format:

   | 10 |
   | bits | 38 bits | 16 bits | 64 bits |
   +----------+-------------+-----------+----------------------------+
   |1111111011| 0 | subnet ID | interface ID |
   +----------+-------------+-----------+----------------------------+


But current implementations of these methods check only the prefix of address.
They do not check that following 54 bits for Link-Local and 38 bits for Site-Local
are zeros:

    public boolean isLinkLocalAddress() {
return (ipaddress[0] & 0xff) == 0xfe && (ipaddress[1] & 0xc0) == 0x80;
    }

    public boolean isSiteLocalAddress() {
return (ipaddress[0] & 0xff) == 0xfe && (ipaddress[1] & 0xc0) == 0xc0;
    }

So the next addresses will be link local:
[fe81::] , [fe80:100::] , [fe80:0:ff00:1::] , [fe80:0:0:1::]

and the next addresses will be site local:
[fec1::], [fec2::], [fec0:0:ff::fe00], [fec0::fd:0:0:0]

This implementation is inconsistent with rfc2373

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