cybersecurity · intermediate · ~15 min · safe pentest lab

Is it a private (RFC1918) address?

Recognise the RFC1918 private ranges.

Challenge

Implement int is_private_ip(int a, int b) returning 1 if the address starts 10.x, 192.168.x, or 172.16-31.x (private lab ranges), else 0.

Starter code

int is_private_ip(int a, int b) {
    /* TODO */
    return 0;
}

Solve this exercise in the browser editor — compile and run against the test harness, no setup required.