Girish Moodalbail wrote:
I can see two ways forward on that one:
1. Do not allow hostnames for create-addr at all.
2. Make a hostname lookup all the IPv4 and IPv6 addresses and create a
single object with all those addresses in it. I.e., not need for a -f.
In case [2] above how will we be able to apply 'address' properties
specific to v4 or v6 addresses.
You wouldn't be able to, just like you can't use ipadm to manipulate a
single IPv6 address assigned as part of ipadm create-ipv6addrs; you can
only manipulate the named object, which would be bge0/myhost.com.
Can we consider creating address using hostname as a special case of
assigning static addresses to an interface?
Once we have done that, we can individually refer the address using the
tuple <interface, address>, which is the same tuple used to identify
'statically' added addresses.
That feels like being about to create a file using
creat("/tmp/foobar")
but then being able to delete/unlink it using its inode number.
I think the architectural principle is that if you create something with
a given name, you use that same name when you modify the object and when
you delete it.
for eg:
#ipadm create-addr -i bge1 hostname
--> it returned 2 v4 addresses and 1 v6 address (v4addr1,
v4addr2, v6addr1)
#ipadm show-addr
--> displays all the addresses just assigned to the interface
#ipadm set-addrprop -i bge1 -p <prop>=<val> v4addr1
--> sets the property on v4addr1.
similarly we could do it for other addresses.
For deletion, we select individual addresses using the tuple.
Above should work, right?
No.
While one can try to get it to work in simple examples such as the
create-addr when getaddrinfo returns N addresses, I don't think there is
any sane semantics when it comes to stateless and DHCPv6; what would it
mean to delete one address out of the set assigned by stateless or DHCPv6?
Note that if we allow hostnames with create-addr (and we are not
changing the Solaris kernel) then libipadm has to do some extra work to
keep the association between the label and the address set. This is due
to the fact that getaddrinfo can return a different set of addresses at
different times.
Thus if I do
ipadm create-addr -i bge0 myhost.com
and later do
ipadm delete-addr -i bge0 myhost.com
then I want to delete the addresses I added, and not what getaddrinfo
returned at the time of the delete.
Erik
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