在 JS [Javascript] 中将 CIDR 地址从十六进制转换为二进制

Question

I'm looking for a way to read a list of CIDR addresses and convert them into a binary strings. The input is a file with rows of actions and addresses and destinations:

ADD 192.168.20.16/28 A

FIND 255.255.255.0

REMOVE 192.168.20.16/28 A

How can I convert these addresses to binary? For example:

192.168.20.191 to 11000000.10101000.00010100.10111111

192.168.20.16/28 to 11000000.10101000.00010100.00010000

192.168.0.0/16 to 11000000.10101000.00000000.00000000

Answer 1

From here .

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 function dec2bin(dec){ return dec.toString(2); } const ips = ["192.168.20.191", "192.168.20.16", "192.168.0.0"] ips.forEach((ip, index) => { const parts = ip.split(".") const newParts = [] parts.forEach(part => { newParts.push(dec2bin(parseInt(part))) }) ips[index] = newParts.join(".") }) console.log(ips)

It's not perfect, because of zeros to the left, which are omitted, but you can improve this solution.