【Unity】端末自分自身のipアドレスを取得する

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Unity上で端末のipアドレスを取得する方法のメモ書き．本当にただのメモ書きなので，自分で欲しい機能があったら，適宜書き換えて下さい(o・ω・o)

今の状態だとゲッターも書いてないです．

Environment

Unity2018.2.14f1
Windows10

Method

GetIPAddress!なんてものは…

端末にはネットワークインターフェースがたくさんくっついている．

Ethernet，Wi-Fiをはじめ，Bluetooth，仮想マシンなどインストールしている端末には仮想ネットワークインターフェース，Wiresharkがインストールされている端末にはNpcap Loopback Adapterとか…

それらの中で知りたいインターフェース(だいたいはWi-Fi)を指定して現在のipアドレスを取得する必要があるため，ちょっと面倒くさいのだ…

以下サンプルソース

Sample.cs

using System;
using System.Collections.Generic;
using System.Net.NetworkInformation;
using UnityEngine;
using UnityEngine.UI;
public class Sample : MonoBehaviour {
//obtained values
[SerializeField, Space] private string _ipAddress;    //This device ip
//predefined values
[SerializeField, Space(15f)] private string _priorityIntafaceName;    //もし参照を優先したいインターフェースがあったらココに書く．なければ空白
//link components
[SerializeField, Space(15f)] private Dropdown _selectNetworkInterfaceDropdown;
private List<NetworkInterfaceData> _networkInterfaces = new List<NetworkInterfaceData>();
// Use this for initialization
void Start () {
GetIpAddress();
}
/// <summary>
/// Fetch the IP address of this terminal
/// </summary>
private void GetIpAddress()
{
_selectNetworkInterfaceDropdown.options.Clear();
_networkInterfaces.Clear();
//string hostname = Dns.GetHostName();
NetworkInterface[] nis = NetworkInterface.GetAllNetworkInterfaces();
bool isfoundPriorityInterface = false;
foreach (var ni in nis)
{
IPInterfaceProperties ipip = ni.GetIPProperties();
UnicastIPAddressInformationCollection uipaic = ipip.UnicastAddresses;
foreach (var uipai in uipaic)
{
if (ni.NetworkInterfaceType != NetworkInterfaceType.Loopback
&& ni.NetworkInterfaceType != NetworkInterfaceType.Tunnel
&& uipai.Address.AddressFamily.ToString() == "InterNetwork"
&& ni.Name != "lo"
&& ni.Name != "lo0"
&& uipai.Address.ToString().IndexOf("169.254") == -1)
{
//Debug.Log("[" + ni.Name + "] " + uipai.Address);
_networkInterfaces.Add(new NetworkInterfaceData(ni.Name, uipai.Address));
_selectNetworkInterfaceDropdown.options.Add
(new Dropdown.OptionData(_networkInterfaces[_networkInterfaces.Count - 1].InterfaceName));
//priority interface
if (ni.Name == _priorityIntafaceName)
{
//Debug.Log(uipai.Address);
_ipAddress = uipai.Address.ToString();
_selectNetworkInterfaceDropdown.value = _selectNetworkInterfaceDropdown.options.Count - 1;
isfoundPriorityInterface = true;
}
_selectNetworkInterfaceDropdown.RefreshShownValue();
}
}
}
if (!isfoundPriorityInterface && _selectNetworkInterfaceDropdown.options.Count > 0 &&
_ipAddress == String.Empty)
{
_selectNetworkInterfaceDropdown.value = 0;
_ipAddress = _networkInterfaces[0].IpAddress.ToString();
}
}
/// <summary>
/// Select other network interface by drop down
/// </summary>
public void OnUpdatedSelectInterfaceDropdownValue()
{
Debug.Log("Select interface : " + _networkInterfaces[_selectNetworkInterfaceDropdown.value].InterfaceName);
_ipAddress = _networkInterfaces[_selectNetworkInterfaceDropdown.value].IpAddress.ToString();
}
}

using System;

using System.Collections.Generic;

using System.Net.NetworkInformation;

using UnityEngine;

using UnityEngine.UI;

public class Sample : MonoBehaviour {

//obtained values

[SerializeField, Space] private string _ipAddress; //This device ip

//predefined values

[SerializeField, Space(15f)] private string _priorityIntafaceName; //もし参照を優先したいインターフェースがあったらココに書く．なければ空白

//link components

[SerializeField, Space(15f)] private Dropdown _selectNetworkInterfaceDropdown;

private List<NetworkInterfaceData> _networkInterfaces = new List<NetworkInterfaceData>();

// Use this for initialization

void Start () {

GetIpAddress();

}

/// <summary>

/// Fetch the IP address of this terminal

/// </summary>

private void GetIpAddress()

{

_selectNetworkInterfaceDropdown.options.Clear();

_networkInterfaces.Clear();

//string hostname = Dns.GetHostName();

NetworkInterface[] nis = NetworkInterface.GetAllNetworkInterfaces();

bool isfoundPriorityInterface = false;

foreach (var ni in nis)

{

IPInterfaceProperties ipip = ni.GetIPProperties();

UnicastIPAddressInformationCollection uipaic = ipip.UnicastAddresses;

foreach (var uipai in uipaic)

{

if (ni.NetworkInterfaceType != NetworkInterfaceType.Loopback

&& ni.NetworkInterfaceType != NetworkInterfaceType.Tunnel

&& uipai.Address.AddressFamily.ToString() == "InterNetwork"

&& ni.Name != "lo"

&& ni.Name != "lo0"

&& uipai.Address.ToString().IndexOf("169.254") == -1)

{

//Debug.Log("[" + ni.Name + "] " + uipai.Address);

_networkInterfaces.Add(new NetworkInterfaceData(ni.Name, uipai.Address));

_selectNetworkInterfaceDropdown.options.Add

(new Dropdown.OptionData(_networkInterfaces[_networkInterfaces.Count - 1].InterfaceName));

//priority interface

if (ni.Name == _priorityIntafaceName)

{

//Debug.Log(uipai.Address);

_ipAddress = uipai.Address.ToString();

_selectNetworkInterfaceDropdown.value = _selectNetworkInterfaceDropdown.options.Count - 1;

isfoundPriorityInterface = true;

}

_selectNetworkInterfaceDropdown.RefreshShownValue();

}

if (!isfoundPriorityInterface && _selectNetworkInterfaceDropdown.options.Count > 0 &&

_ipAddress == String.Empty)

{

_selectNetworkInterfaceDropdown.value = 0;

_ipAddress = _networkInterfaces[0].IpAddress.ToString();

}

/// <summary>

/// Select other network interface by drop down

/// </summary>

public void OnUpdatedSelectInterfaceDropdownValue()

{

Debug.Log("Select interface : " + _networkInterfaces[_selectNetworkInterfaceDropdown.value].InterfaceName);

_ipAddress = _networkInterfaces[_selectNetworkInterfaceDropdown.value].IpAddress.ToString();

}

NetwordInterfaceData.cs

using System.Net;
public class NetworkInterfaceData
{
public string InterfaceName;
public IPAddress IpAddress;
public NetworkInterfaceData(string InterfaceName, IPAddress IpAddress)
{
this.InterfaceName = InterfaceName;
this.IpAddress = IpAddress;
}
}

using System.Net;

public class NetworkInterfaceData

{

public string InterfaceName;

public IPAddress IpAddress;

public NetworkInterfaceData(string InterfaceName, IPAddress IpAddress)

{

this.InterfaceName = InterfaceName;

this.IpAddress = IpAddress;

}

使い方

1. サンプルソースを2つコピペ

2. 適当なゲームオブジェクトにSample.csをアタッチ

3. 適当なDropdownを作成

4. DropdownのOnValueChangedにメソッドを指定

DropdownのOnValueChangedにSample.csのOnUpdatedSelectIntarfaceDropdownValueを指定

5. DropdownをSample.csの変数にアタッチ

6. 再生

SampleクラスのGetIpAddress()を実行することで変数_ipAddressに現在のipAddressが格納される．

Dropdownにはインターフェース一覧が格納されるので，ipAddressを取得したいインターフェースをDropdownから選択することで指定したインターフェースのipAddressが取得される．