33.3.1.0.2 Link../ns-2/ns-link.tcl

This class supports the primitives: up and down, and up? to set and query status_. These primitives are instance procedures of the class.

• The instance procedures []up../ns-2/dynamics.tclLink::up and []down../ns-2/dynamics.tclLink::down set status_ to 1 and 0 respectively.

  In addition, when the link fails, []down will reset all connectors that make up the link. Each connector, including all queues and the delay object will flush and drop any packets that it currently stores. This emulates the packet drop due to link failure.

  Both procedures then write trace entries to each file handle in the list, dynT_.

• The instance procedure []up?../ns-2/dynamics.tclLink::up? returns the current value of status_.

In addition, the class contains the instance procedure []all-connectors../ns-2/dynamics.tclLink::all-connectors. This procedure takes an operation as argument, and applies the operation uniformly to all of the class instance variables that are handles for TclObjects.