Node.js os.networkInterfaces()方法

原文:https://www . geesforgeks . org/node-js-OS-network interfaces-method/

os.networkInterfaces()方法是 os 模块内置的应用编程接口，用于获取计算机网络接口的信息。

语法:

os.networkInterfaces()

参数:此方法不接受任何参数。

返回值:这个方法返回一个包含每个网络接口信息的对象。返回的对象将包含网络接口数组，该数组同样由以下属性组成:

• Address: A string specifying the assigned network address, that is, IPv4 or IPv6/
• Netmask: A string that specifies the IPv4 or IPv6 netmask.
• Series: A string of specified series, whose value is one of IPv4 or IPv6.
• mac: A string that specifies the MAC address of the network interface.
• Internal: A Boolean value, which is true if the interface is loopback, otherwise it is false.
• Scope id: The number that specifies the scope ID for IPv6.
• cidr: A string that specifies the assigned IPv4 or IPv6 address with the routing prefix with CIDR symbol. Set to null if the netmask is invalid.

下面的例子说明了在 Node.js 中 os.networkInterfaces()方法的使用:

例 1:

// Node.js program to demonstrate the   
// os.networkInterfaces() Method

// Allocating os module
const os = require('os');

// Print os.networkInterfaces() value
console.log(os.networkInterfaces());

输出:

{ 'Wi-Fi':
   [ { address: 'fe80::242a:3451:7fb2:3ab1',
       netmask: 'ffff:ffff:ffff:ffff::',
       family: 'IPv6',
       mac: 'b3:52:16:13:de:b9',
       scopeid: 3,
       internal: false,
       cidr: 'fe80::242a:3451:7fb2:3ab1/64' },
     { address: '192.168.0.5',
       netmask: '255.255.255.0',
       family: 'IPv4',
       mac: 'b3:52:16:13:de:b9',
       internal: false,
       cidr: '192.168.0.5/24' } ],
  'Loopback Pseudo-Interface 1':
   [ { address: '::1',
       netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
       family: 'IPv6',
       mac: '00:00:00:00:00:00',
       scopeid: 0,
       internal: true,
       cidr: '::1/128' },
     { address: '127.0.0.1',
       netmask: '255.0.0.0',
       family: 'IPv4',
       mac: '00:00:00:00:00:00',
       internal: true,
       cidr: '127.0.0.1/8' } ] }

例 2:

// Node.js program to demonstrate the   
// os.networkInterfaces() Method

// Allocating os module
const os = require('os');

// Print os.networkInterfaces() value
var net_int = os.networkInterfaces();

var no_of_network_interfaces = 0;

for (var key in net_int) {
  console.log(key);
  var net_infos=net_int[key];

  net_infos.forEach(element => {      
  no_of_network_interfaces++;
  console.log("\tinterface:");

    for (var attr in element){
      console.log("\t\t" + attr + 
          " : " + element[attr] );
    }
  });  
}

console.log("total number of Network "
  + "interfaces is " + no_of_network_interfaces);

输出:

Wi-Fi
        interface:
                address : fe80::242a:3451:7fb2:3ab1
                netmask : ffff:ffff:ffff:ffff::
                family : IPv6
                mac : b3:52:16:13:de:b9
                scopeid : 3
                internal : false
                cidr : fe80::242a:3451:7fb2:3ab1/64
        interface:
                address : 192.168.0.5
                netmask : 255.255.255.0
                family : IPv4
                mac : b3:52:16:13:de:b9
                internal : false
                cidr : 192.168.0.5/24
Loopback Pseudo-Interface 1
        interface:
                address : ::1
                netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
                family : IPv6
                mac : 00:00:00:00:00:00
                scopeid : 0
                internal : true
                cidr : ::1/128
        interface:
                address : 127.0.0.1
                netmask : 255.0.0.0
                family : IPv4
                mac : 00:00:00:00:00:00
                internal : true
                cidr : 127.0.0.1/8
total number of Network interfaces is 4

注意:以上程序使用 node filename.js命令编译运行。

参考:https://nodejs . org/API/OS . html # OS _ OS _ networkinterfaces

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