我想获取登录系统（Web应用程序）的用户的IP地址和MAC地址。我正在使用以下两行代码：
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
当目标（您网站的服务器）和源头（客户机）之间发生套接字连接时，您永远无法获取与您网站连接的用户的MAC地址，您只能获取源头IP地址。因为在套接字连接（客户端 <--> 服务器）中从未发送MAC地址。要获取用户的IP地址：
using System.Net;
Private string GetIP()
{
string strHostName = "";
strHostName = System.Net.Dns.GetHostName();
IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);
IPAddress[] addr = ipEntry.AddressList;
return addr[addr.Length-1].ToString();
}
source: Here
using System.Runtime.InteropServices;
[DllImport("Iphlpapi.dll")]
private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
[DllImport("Ws2_32.dll")]
private static extern Int32 inet_addr(string ip);
private static string GetClientMAC(string strClientIP) {
string mac_dest = "";
try {
Int32 ldest = inet_addr(strClientIP);
Int32 lhost = inet_addr("");
Int64 macinfo = new Int64();
Int32 len = 6;
int res = SendARP(ldest, 0, ref macinfo, ref len);
string mac_src = macinfo.ToString("X");
while (mac_src.Length < 12) {
mac_src = mac_src.Insert(0, "0");
}
for (int i = 0; i < 11; i++) {
if (0 == (i % 2)) {
if (i == 10) {
mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));
} else {
mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));
}
}
}
} catch (Exception err) {
throw new Exception("Lỗi " + err.Message);
}
return mac_dest;
}
您可以使用以下代码片段获取MAC地址。要实现此功能，您需要在应用程序中添加System.Management命名空间。如果它不可用，则需要从项目的“添加引用”中添加其引用。
using System.Management;
using System.IO;
public string GetMACAddress()
{
string mac_src = "";
string macAddress = "";
foreach (System.Net.NetworkInformation.NetworkInterface nic in System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces())
{
if (nic.OperationalStatus == System.Net.NetworkInformation.OperationalStatus.Up)
{
mac_src += nic.GetPhysicalAddress().ToString();
break;
}
}
while (mac_src.Length < 12)
{
mac_src = mac_src.Insert(0, "0");
}
for (int i = 0; i < 11; i++)
{
if (0 == (i % 2))
{
if (i == 10)
{
macAddress = macAddress.Insert(macAddress.Length, mac_src.Substring(i, 2));
}
else
{
macAddress = macAddress.Insert(macAddress.Length, mac_src.Substring(i, 2)) + "-";
}
}
}
return macAddress;
}
当IIS部署此应用程序并运行代码时...成功运行
public string GetIPAddress()
{
System.Web.HttpContext context = System.Web.HttpContext.Current;
string ipAddress = context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (!string.IsNullOrEmpty(ipAddress))
{
string[] addresses = ipAddress.Split(',');
if (addresses.Length != 0)
{
return addresses[0];
}
}
return context.Request.ServerVariables["REMOTE_ADDR"];
}
[DllImport("Iphlpapi.dll")]
private static extern int SendARP(Int32 dest, Int32 host, ref Int64 mac, ref Int32 length);
[DllImport("Ws2_32.dll")]
private static extern Int32 inet_addr(string ip);
private static string GetClientMAC(string strClientIP)
{
string mac_dest = "";
try
{
Int32 ldest = inet_addr(strClientIP);
Int32 lhost = inet_addr("");
Int64 macinfo = new Int64();
Int32 len = 6;
int res = SendARP(ldest, 0, ref macinfo, ref len);
string mac_src = macinfo.ToString("X");
while (mac_src.Length < 12)
{
mac_src = mac_src.Insert(0, "0");
}
for (int i = 0; i < 11; i++)
{
if (0 == (i % 2))
{
if (i == 10)
{
mac_dest = mac_dest.Insert(0, mac_src.Substring(i, 2));
}
else
{
mac_dest = "-" + mac_dest.Insert(0, mac_src.Substring(i, 2));
}
}
}
}
catch (Exception err)
{
throw new Exception("Lỗi " + err.Message);
}
return mac_dest;
}
protected void Button1_Click1(object sender, EventArgs e)
{
Label1.Text = GetClientMAC(GetIPAddress());
}
MAC地址无法通过.NET或JS应用程序访问。 MAC地址从未通过套接字连接发送，只有IP地址，因此您只能使用以下代码获取IP地址：
public string GetIPAddress()
{
System.Web.HttpContext context = System.Web.HttpContext.Current;
string ipAddress = context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (!string.IsNullOrEmpty(ipAddress))
{
string[] addresses = ipAddress.Split(',');
if (addresses.Length != 0)
{
return addresses[0];
}
}
首先，了解为什么要获取客户端（用户）的MAC地址会很好，因为 MAC地址并不是唯一的。
您只能使用.NET Framework来获取服务器连接，而不能获取用户本身。要获取客户端MAC地址，只能依靠JavaScript和ActiveX控件，这只能在Internet Explorer上使用，因为Firefox已经在几年前停止支持ActiveX控件。
关于此问题的良好阅读材料可以在this article中找到。