/// <summary>
/// 根据子网地址和掩码地址初始化子网类
/// </summary>
/// <param name="_ip">子网地址</param>
/// <param name="_mask">掩码地址</param>
public Subnet(IpAddress _ip, IpAddress _mask)
{
if (!_mask.IsValidMask())
{
throw new SubnetErrorException("不是正确的掩码格式");
}
if (_ip.GetSubnetAddress(_mask).CompareTo(_ip) != 0)
{
throw new SubnetErrorException("子网地址和掩码不搭配");
}
ip = _ip;
mask = _mask;
maskBitsNum = _mask.GetMaskBits();
}