message from sctp getsockopt or sctp_opt_info show error

[jyl_2006]

OK ,In Ubuntu, I use getsockopt to get sctp_status with lksctp tarball, the
result show me that only sender get the correct value about cwnd , the
receive's cwnd keep the same value.

Second time, I use Ubuntu as sender and use FreeBSD 9.0 as receiver, and I 
does not set any system parameters by using command sysctl.

Both the receiver and sender set
subscribe.sctp_data_io_event = 1; 
subscribe.sctp_association_event = 1; 

The result same with the first time.

So , does something I did wrong or steps I missed?

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