Hi, all. Wish everyone a merry Christmas and a happy new year! I was going through the source code of ns and got confused when I wanted to find out how 'target_' of class agent, which is derived from class connector, gets initialized? I know in Connector::command(), command "target" is defined to do so. But where does this got invoked? In function simulator's attach-agent{}, it calls node's attach{}. But in attach "target" command is not invoked. Finally I find the target_ was initialized after invoking Node's function:add-target { agent port }. But, how? I don't understand the code of this function:
Node instproc add-target { agent port } { $self instvar ptnotif_ # Replaces the following line from old ns (2.1b7 and earlier) # $self add-target $agent $port foreach m [$self set ptnotif_] { $m attach $agent $port } } It seems that the expression "$m attach $agent $port" does not invoke the function Node instproc attach { agent { port "" } }(Because I got it to print information and if it is called it will print). What is this "attach"? And how is target_ of agent finally got initialized? Thanks. HuangWei