java - 如何使用 Java 从 CIDR 表示法或地址网络掩码对中获取 IP 范围

Question

例如:
如何获取CIDR Notation 10.66.114.0/24的低高IP地址
在这种情况下，答案是:
10.66.114.1 - 10.66.114.254

Answer 1

这是它的要点(我是一个 C 人):

unsigned int network = 0x0a427200; /* 10.66.114.0 */
unsigned int subnet_length = 24;

unsigned int mask = 0xfffffff << (32 - subnet_length);
unsigned int bcast = 0xffffffff >> (32 - subnet_length);

unsigned int start_ip = (network & mask) + 1;
unsigned int end_ip = (network & mask) + (bcast - 1);