[sctp-dev] RFC 5061 is implemented or not?

[Mehmet Aslan]

Hello All,
I am trying to use the functionalities brought by RFC5061 extension to the
SCTP protocol RFC4960, like binding or unbinding IP addresses to a connected
association (I mean after the connection established, during communication).
My configuration is very simple and is as follows:

Server:                                           Client:
192.168.1.25: 3456                         192.168.1.133:6060

With this configuration I can communicate with the server and I can transfer
a file from the server to the cllient successfully. However, following the
connection to the server, when I tried binding another address (
192.168.1.25:6060) to the client, using "*bindAddresses()*" method, the
client does not inform server about this binding. On the client side, it is
shown as if the new address has been bound as the result of "*
getAllLocalAdresses()*". But when it is tested on the server side, the
server always gives the same result to "*getRemoteAddresses()*" call, before
and after binding the new address. Binding a new addres to a connected
association does not have any effect on the other endpoint.

Besides, for the following configuration;

Server:                                           Client:
192.168.1.25: 3456                         192.168.1.133:6060
                                                     192.168.1.25:  6060

(The 2 IP addresses on the client side are bound before "*connect()*",
otherwise I cannot bind after connection as explained above.)
 I could not achieve to use
"*setOption(SctpStandardSocketOption.SCTP_SET_PEER_PRIMARY_ADDR,
socketaddr)*" For example, on the client side the PRIMARY_ADDR is
...133:6060, I want to change this adress to be ...25:6060 by using the
"setOption()" method initiated from the client side. But what I get is;

"*setOption exception: java.net.SocketException: Operation not permitted*"

It seems that RFC5061 is not implemented. But then, what is the meaning of
the following quotation, taken from SCTP API "*bindAddresses()*" description
of SctpChannel:
"Adding addresses to a connected association is optional functionality. If
the endpoint supports dynamic address reconfiguration then it may send the
appropriate message to the peer to change the peers address lists."
Since both of the endpoints (server and client) are on the same comuter,
using the same library, they should support dynamic address reconfiguration.
However they don't.
So, how is it possible to clarify if RFC5061 is implemented or not? If it
has been already implemented, why can not I achive using RFC5061
functionalities. Am I doing something wrong or what?

My platform is: Ubuntu 10.10, OpenJDK7 - b118, NetBeans 6.9, one computer
with two interfaces; cabel and wireless.

Thanks in advance.
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