bird4 scope link

[Amadeus Alfa]

Hello list,

I have checked the implementation again and it seems ‘ipv4_has_link_scope()’ is not implemented:

ipv6.h (everything works fine):
65  #define ipa_has_link_scope(x) ipv6_has_link_scope(&(x))
90  static inline int ipv6_has_link_scope(ip_addr *a)
91  {
92    return ((a->addr[0] & 0xffc00000) == 0xfe800000);
93  }

ipv4.h (returns 0 in any case)
59  #define ipa_has_link_scope(x) ipv4_has_link_scope(_I(x))
77  static inline int ipv4_has_link_scope(u32 a UNUSED)
78  {
79   return 0;
80  }

However, does it make sense to do this check in the first place?

Thanks,
Amadeus


> On 21 Feb 2015, at 18:39, Amadeus Alfa <amadeus at freehop.mooo.com> wrote:
> 
> I forgot to mention that my interface ‘784648196’ has an IPv4 scope link address configured like this:
> 
> 784648196 at NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1462 qdisc pfifo_fast master bat0 state UNKNOWN group default qlen 1000
> inet 169.254.40.2/21 scope link 784648196
> 
> How can I use scope link configurations with BGP in bird4?
> 
> Thanks again,
> Amadeus
> 
> 
>> On 14 Feb 2015, at 12:13, Amadeus Alfa <amadeus at freehop.mooo.com <mailto:amadeus at freehop.mooo.com>> wrote:
>> 
>> Hello list,
>> 
>> in bird6 I can use the following configuration snippet with IPv6 link local addresses:
>> 
>> protocol bgp xxx {
>>   neighbor fe80::2ff:c0bb:fe00:1234 % '784648196' as 1234;
>> };
>> 
>> ('784648196' is the interface name)
>> 
>> My question is now: How can I use IPv4 scope link addresses in bird4?
>> 
>> When I use the line below I get an error: "Link-local address and interface scope must be used together"
>> 
>> protocol bgp xxx {
>>   neighbor 169.254.0.1 % '784648196' as 1234;
>> };
>> 
>> Thanks,
>> Amadeus
> 

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