ripe-ip-adjuster

ripe-ip-adjuster.py

def adjust_to_network(ip_in, end_ip_in):
    # Convert starting IP to its network address and ensure it's aligned to the nearest network boundary
    start_ip = ipaddress.IPv4Address(int(ipaddress.IPv4Network(ip_in, strict=False).network_address) & ~1)

    # Convert ending IP to its network address
    end_ip = ipaddress.IPv4Network(end_ip_in, strict=False).network_address
    end_ip_int = int(end_ip)

    # Adjust the end IP based on the last 2 bits, ensuring the last bit is always 1
    mask = end_ip_int % 4

    if mask == 0b00:
        end_ip_int -= 1  # Move to the previous valid broadcast address
    elif mask == 0b10:
        end_ip_int += 1  # Move to the next valid address

    end_ip = ipaddress.IPv4Address(end_ip_int)

    return start_ip, end_ip