Addressing scheme in NS

[Shuqian Yan <syan@catarina.usc.edu>]

Hello,

Can somone explain the new addressing scheme used in the latest version
of ns? for example in ip.h, the following have been defined, 

	ns_addr_t& src() { return (src_); }
        nsaddr_t& saddr() { return (src_.addr_); }
        int32_t& sport() { return src_.port_;}

does ns_addr_t& src() { return (src_); } define both the node and port
address for the src???

does nsaddr_t& saddr() { return (src_.addr_); } define only the node
address?

does int32_t& sport() { return src_.port_;} define the port address on the
node??

tks.

shuqian