我正试图在Ubuntu上使用NS-2 2.35版本来学习网络模拟器教程,但我似乎看不到TCP窗口的大小,我得到的错误似乎没有用。代码:
set ns [new Simulator]
set tcp [new Agent/TCP]
$tcp set window_ 1
# This fails!
puts [$tcp window]
# So does this:
#puts [$tcp window_]
输出:
(_o10 cmd line 1)
invoked from within
"_o10 cmd window"
invoked from within
"catch "$self cmd $args" ret"
invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..."
(procedure "_o10" line 2)
(SplitObject unknown line 2)
invoked from within
"$tcp window"
invoked from within
"puts [$tcp window]"
(file "window-test.tcl" line 8)
如何解决此问题并输出TCP窗口大小?更普遍地说,有没有一种方法可以获得更有用的错误?
根据本教程,您可以使用set
方法从实例变量中写入和读取,具体取决于您给它的参数数量。这就像基本的Tcl set
命令一样(尽管它并不真正了解实例变量)。因此,在您的情况下,您可能会这样做:
puts [$tcp set window_]