trepix / ip-validator-kata

Problem

We want to validate IP v4 addresses. Create a function that takes a string and return true if it is valid host assignable IP address and false if not.

IPv4 addresses are 32 bits long and grouped into 4 one byte blocks separated by dotted-decimal notation. E.g. 192.168.1.1.

Most IP addresses ending in 0 represent the entire network segment and cannot be used as host addresses. Most IP addresses ending in 255 represent a broadcast address and cannot be used as a host address. There are exceptions, when using subnets, for the sake of this Kata any address ending in 0 or 255 is not a valid host address.

🚨 We strongly recommend not using regular expressions to solve this kata.

Examples

IP Address	Result
1.1.1.1	true
192.168.1.1	true
10.0.0.1	true
127.0.0.1	true
0.0.0.0	false
255.255.255.255	false
1.1.1.0	false
10.0.1	false