所以我有一个ANDing IPv4地址和子网地址的脚本。不检查它是否是有效输入(我应该添加),它将输入转换为二进制。
if ($readInput -match "y"){
$readIP = read-host "Please input an IPv4 address to be ANDed "
# need to add subnet mask later.
$readSub = read-host "Please input the Subnet Mask "
#need to delimite '.'
#$readIP.split "."
#$readSub.split "."
#need to join them
#convert IPv4 address to binary, period seperated at each octet. (input ip, base 2)
$binIP = [convert]::ToString($readIP,2)
write-host "$binIP" -backgroundcolor "white" -foregroundcolor "black"
## need to have two 32 element array that compares each 1 and 0. loop through each one with a counter and compare them with
## conditional if statements
#conditional statements for /cider notion to equal a binary number (mask, base 2)
$binSub = [convert]::ToString($readSub,2)
write-host "$binSub" -backgroundcolor "white" -foregroundcolor "black"
}
输入是:
19216823
2552552550
输出结果为:
1001001010011100110110111
10011000001001001101110001100110
我是否必须在IP地址末尾添加7个尾随0才能执行正确的AND操作?
答案 0 :(得分:7)
通常更容易使用[IPAddress]
课程。例如:
$ip = [IPAddress] "192.168.32.76"
$networkMask = [IPAddress] "255.255.255.0"
$networkID = [IPAddress] ($ip.Address -band $networkMask.Address)
$networkID.IPAddressToString # outputs "192.168.32.0"
如果要计算网络掩码字符串中的位数,可以使用如下函数:
function ConvertTo-IPv4MaskBits {
param(
[parameter(Mandatory=$true)]
[String] $MaskString
)
$mask = ([IPAddress] $MaskString).Address
for ( $bitCount = 0; $mask -ne 0; $bitCount++ ) {
$mask = $mask -band ($mask - 1)
}
$bitCount
}
此函数假定正确形成的网络掩码ID。
我写的一篇文章中提供了完整的文章和更多功能: