host.py 文件源码

def get_free_ip(subnets):
    for subnet in subnets:
        reserved = subnet.reserved_addresses
        net = ipaddr.IPv4Network(subnet.address)
        used_ips = [ip.address for ip in subnet.ips]

        if (net.numhosts -2 - reserved) <= len(used_ips):
            continue

        for ip in net.iterhosts():
            if reserved > 0:
                reserved -= 1
                continue
            if ip.compressed not in used_ips:
                return ip.compressed

    raise SubnetFullException()