Work with IPv4 addresses
npm install ctr-ipaddrbash
$ npm install ctr-ipaddr
`
Usage
`js
const {IPv4} = require('ctr-ipaddr');
`
$3
`js
let ipLong = IPv4.toLong("192.168.0.1"); // => 3232235521
`
$3
`js
let ipStr = IPv4.fromLong(3232235521); // => "192.168.0.1"
`
$3
`js
let cidr1 = IPv4.cidrFromMask("255.255.255.0"); // => 24
let cidr2 = IPv4.cidrFromMask(24); // => 24
let cidr3 = IPv4.cidrFromMask(4294967040); // => 24
`
$3
`js
let ip1 = new IPv4("192.168.0.1/24");
let ip2 = new IPv4("192.168.0.1/255.255.255.0");
let ip3 = new IPv4("192.168.0.1", 24);
let ip4 = new IPv4("192.168.0.1", "255.255.255.0");
let ip5 = new IPv4(3232235521, 24);
`
After initialization it offers you following properties:
`json
{
"ip": "192.168.0.1",
"ipLong": 3232235521,
"mask": "255.255.255.0",
"maskLong": 4294967040,
"maskCidr": 24,
"hostMaskLong": 255,
"hostMask": "0.0.0.255",
"netSize": 256,
"netAddrLong": 3232235520,
"netAddr": "192.168.0.0",
"broadcastLong": 3232235775,
"broadcast": "192.168.0.255"
}
`
$3
On the instance of an object there is also a generator method `* eachForSubnet(startIp = void 0)`, which returns a generator for all IPv4 objects for IP addresses from a subnet. If you not specify the `startIp` parameter the generation will be started from the first address of the subnet.
`js
let subnet = ip1.eachForSubnet();
subnet.next(); // => { value: IPv4 { ip: 192.168.0.0, ... }, done: false }
subnet.next(); // => { value: IPv4 { ip: 192.168.0.1, ... }, done: false }
subnet.next(); // => { value: IPv4 { ip: 192.168.0.2, ... }, done: false }
...
subnet.next(); // => { value: IPv4 { ip: 192.168.0.255, ... }, done: false }
subnet.next(); // => { value: undefined, done: true }
`
`js
let subnet = ip1.eachForSubnet("192.168.0.253");
subnet.next(); // => { value: IPv4 { ip: 192.168.0.253, ... }, done: false }
subnet.next(); // => { value: IPv4 { ip: 192.168.0.254, ... }, done: false }
subnet.next(); // => { value: IPv4 { ip: 192.168.0.255, ... }, done: false }
subnet.next(); // => { value: undefined, done: true }
`
$3
On the instance of an object there is a method named belongsToSubnet(ip), which returns true when the given ip address belongs to the subnet represented by the instance.
`js
ip1.belongsToSubnet("192.168.0.5"); // => true
ip1.belongsToSubnet("10.0.0.1"); // => false
``