nodejs和ip相关的一些模块

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ip

//npm
npm install ip
// npm readme
https://www.npmjs.com/package/ip
// github
git clone https://github.com/indutny/node-ip.git

let ip = require('ip');
ip.address() // my ip address
ip.isPrivate('127.0.0.1') // Check whether an IP is within a private IP address range.
ip.isV4Format('127.0.0.1'); // Check whether an IP is a IPv4 address.
ip.isV6Format('::ffff:127.0.0.1'); // Check whether an IP is a IPv6 address.

address

//npm
npm install address
// npm readme
https://www.npmjs.com/package/address
// github
git clone https://github.com/node-modules/address

let address = require('address');
address.ip();   // 192.168.0.125
address.ipv6();   // 192.168.0.125
// 获取默认mac地址
address.mac(function (err, addr) {
  console.log(addr); // '78:ca:39:b0:e6:7d'
});

// 指定网卡获取mac地址
address.mac('enp1s0', function (err, addr) {
  console.log(addr); // '0a:00:27:00:00:00'
});

// dns是通过读取/etc/resolv.conf获取的建议用nmcli获取
address.dns((err, addrs) => {
  console.log(addrs);
  // ['10.13.2.1', '10.13.2.6']
});

address((err, addrs) => {
  console.log(addrs.ip, addrs.ipv6, addrs.mac);
  // '192.168.0.2', 'fe80::7aca:39ff:feb0:e67d', '78:ca:39:b0:e6:7d'
});

address('enp1s0', (err, addrs) => {
  console.log(addrs.ip, addrs.ipv6, addrs.mac);
  // '192.168.56.1', null, '0a:00:27:00:00:00'
});

address.interface('IPv4', 'eth1');
// { address: '192.168.1.1', family: 'IPv4', mac: '78:ca:39:b0:e6:7d' }

netmask

//npm
npm install netmask
// npm readme
https://www.npmjs.com/package/netmask
// github
git clone https://github.com/rs/node-netmask

var Netmask = require('netmask').Netmask
var block = new Netmask('10.0.0.0/12');
block.base;                     // 10.0.0.0
block.mask;                     // 255.240.0.0
block.bitmask;                  // 12
block.hostmask;                 // 0.15.255.255
block.broadcast;                // 10.15.255.255
block.size;                     // 1048576
block.first;                    // 10.0.0.1
block.last;                     // 10.15.255.254

block.contains('10.0.8.10');    // true
block.contains('10.8.0.10');    // true
block.contains('192.168.1.20'); // false

block.forEach(function(ip, long, index));

block.next()                    // Netmask('10.16.0.0/12')

ipaddr.js

//npm
npm install ipaddr.js
// npm readme
https://www.npmjs.com/package/ipaddr.js
// github
git clone https://github.com/whitequark/ipaddr.js

// 可以用来校验和格式化
let ipaddr = require('ipaddr.js');

// 可以获取掩码的bitmask 也可以校验掩码格式
ipaddr.IPv4.parse('255.255.255.240').prefixLengthFromSubnetMask() == 28
ipaddr.IPv4.parse('255.192.164.0').prefixLengthFromSubnetMask()  == null

// bitmask转掩码
ipaddr.IPv4.subnetMaskFromPrefixLength(24) == '255.255.255.0'
ipaddr.IPv4.subnetMaskFromPrefixLength(29) == '255.255.255.248'