如何知道node.js中的网络掩码？

Question

I'm developing a tool for networking and I don't know how to get the network mask of the computer that executes the program. I know I can get the IP by OS library, but I don't know how I could know the mask, Can you help me?

Thank you in advance!

EDIT: I'm using 0.10.* version... I know there's in 0.11.11 version the option "netmask" on require('os').networkInterfaces(). But I have to use 0.10.* version.

Answer 1

You can always execute ifconfig from your node script, then parse the output and extract the netmask parameter for the network interface you're interested in.

You could run ifconfig interface_name | grep 'inet ' ifconfig interface_name | grep 'inet ' , where interface_name would be the interface you're interested in. Parsing the output of the above should be pretty easy. On OSX, look for the value after 'netmask', on Linux 'Mask:'