这里我有一个我需要检查的范围的静态引用:
private static List<string> Ip_Range = new List<string>()
{
"12.144.86.0/23",
"31.201.1.176/30",
"46.36.198.101/32",
"46.36.198.102/31",
"46.36.198.104/31",
"46.136.172.0/24",
"63.65.11.0/24",
"63.65.12.0/25",
"63.65.12.128/26",
"63.65.12.192/27",
"63.65.12.224/28",
"63.65.12.240/29",
"63.65.12.248/30",
"63.65.12.252/31",
"63.65.12.254/32",
"65.173.56.0/21",
"67.23.241.179/32",
"67.23.241.180/30",
"67.23.241.184/29",
"67.23.241.192/30",
"67.23.241.196/31",
"67.23.241.198/32",
"72.32.164.56/29",
"72.46.244.32/28",
"74.91.16.48/29",
"74.91.16.208/29",
"74.91.20.48/28",
"74.91.20.64/29",
"74.112.134.120/29",
"74.112.135.104/29",
"74.205.37.16/29",
"78.24.205.32/28",
"98.129.27.88/29",
"98.129.91.40/29",
"166.114.0.0/16",
"167.157.0.0/16",
"174.143.165.80/29",
"186.0.156.0/22",
"186.2.0.0/17",
"186.27.0.0/17",
"190.0.248.0/21",
"190.3.184.0/21"
};
下面是一些我认为它如何工作的伪代码:
public static bool IpIsWithinRange(string ip) //Something like 127.0.0.1 or 184.56.26.35
{
IPAddress incomingIp = IPAddress.Parse(ip);
foreach (var subnet in Ip_Range)
{
IPAddress sub = IPAddress.Parse(subnet); ?????
if (incomingIp "is in" sub) ?
return true;
}
return false;
}
关于如何编写此功能的代码有什么建议吗?
最佳答案
如果您不想/不能将另一个库(如 IPnetwork 库)添加到您的项目并且只需要处理 IPv4 CIDR 范围,这里有一个快速解决您的问题的方法
// true if ipAddress falls inside the CIDR range, example
// bool result = IsInRange("10.50.30.7", "10.0.0.0/8");
private bool IsInRange(string ipAddress, string CIDRmask)
{
string[] parts = CIDRmask.Split('/');
int IP_addr = BitConverter.ToInt32(IPAddress.Parse(ipAddress).GetAddressBytes(), 0);
int CIDR_addr = BitConverter.ToInt32(IPAddress.Parse(parts[0]).GetAddressBytes(), 0);
int CIDR_mask = IPAddress.HostToNetworkOrder(-1 << (32 - int.Parse(parts[1])));
return ((IP_addr & CIDR_mask) == (CIDR_addr & CIDR_mask));
}
以上将允许您快速检查给定的 IPv4 地址是否在给定的 CIDR 范围内;请注意,上面的代码是准系统,在将它们提供给函数之前,您需要检查给定的 IP(字符串)和 CIDR 范围是否正确(您可以只使用 tryparse 或其他...)
关于c# - 如何使用 CIDR 表示法查看 IP 地址是否属于 IP 范围内?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9622967/