BGP: Add support for peering with link-local IPv6 addresses

[Matthias Schiffer]

On 12/21/2010 01:21 AM, Ondrej Zajicek wrote:
> diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
>> index 53b30ca..fc73be8 100644
>> --- a/sysdep/bsd/krt-sock.c
>> +++ b/sysdep/bsd/krt-sock.c
>> @@ -541,7 +541,7 @@ krt_read_addr(struct ks_msg *msg)
>>      _I0(ifa.ip) = 0xfe800000;
>>  #endif
>>  
>> -  if (iface->flags & IF_MULTIACCESS)
>> +  if ((iface->flags & IF_MULTIACCESS) || ipa_has_link_scope(ifa.ip))
>>    {
>>      ifa.prefix = ipa_and(ifa.ip, ipa_mkmask(masklen));
>>  
> What is exactly that? Link-local addresses are broken (in BIRD)
> on non-multiaccess devices on *BSD?
>
Without that patch, on *BSD link-local addresses will be marked as
unnumbered on pointopoint interfaces, while they are in fact /64. This
breaks the is_connected() check that's called from neigh_find2(), as
there is no opposite address.

Matthias Schiffer


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