IP地址重叠/ CIDR中的范围 [英] IP Address overlapping/in range of CIDR

问题描述

我在无符号长格式的IP地址，在C ++编码
我有一个CIDR标记的IP地址范围，如10.2.3.98/24

I have an IP address in unsigned long format, coding in C++ I have a CIDR notation IP address range such as "10.2.3.98/24"

如何检查我的IP地址与上述范围重叠？

How do i check if my IP address overlaps with the mentioned range?

推荐答案

如果你已经知道IP地址为unsigned long和数字这应该工作：

This should work if you already know ip addresses as unsigned long and numbers:

bool cidr_overlap(uint32_t ip1, int n1,
                  uint32_t ip2, int n2)
{
    return (ip1 <= (ip2 | ((1ul << (32-n2))-1)))
        || (ip2 <= (ip1 | ((1ul << (32-n1))-1)));
}

这篇关于IP地址重叠/ CIDR中的范围的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！