/// <summary>
/// 判断地址是不是局域网地址
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsLocalAddress(this IPAddress address)
{
var parts = address.GetIntPart();
if (address.IsA())
{
if (parts[0] == 10)
{
return true;
}
}
if (address.IsB())
{
if (parts[0] == 172)
{
if (parts[1] >= 16 && parts[1]<= 31)
{
return true;
}
}
}
if (address.IsC())
{
if (parts[0] == 192 && parts[1] == 168)
{
return true;
}
}
return false;
}
/// <summary>
/// 是不是E类地址（广播）
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsE(this IPAddress address)
{
var parts = address.GetIntPart();
return parts[0] >= 240 && parts[0] <= 255;
}
/// <summary>
/// 是不是D类地址（多点广播）
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsD(this IPAddress address)
{
var parts = address.GetIntPart();
return parts[0] >= 224 && parts[0] <= 239;
}
/// <summary>
/// 是不是C类地址
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsC(this IPAddress address)
{
var parts = address.GetIntPart();
return parts[0] >= 192 && parts[0] <= 223;
}
/// <summary>
/// 是不是B类地址
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsB(this IPAddress address)
{
var parts = address.GetIntPart();
return parts[0] >= 128 && parts[0] <= 191;
}
/// <summary>
/// 是不是A类地址
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
public static bool IsA(this IPAddress address)
{
var parts = address.GetIntPart();
return(parts[0] >= 1 && parts[0] <= 126);
}