1. New Argument (--nmapdatadir): Users can specify their own NSE script directory using this argument. If they don't, the script will look for it in default directories.

2. Directory Check: If the user provides a directory that doesn’t exist, the script will notify them and exit.

3. Dynamic NSE Script Path Detection: If no custom path is given, the script will try to locate it using common paths (/usr/local/share/nmap/scripts, /usr/share/nmap/scripts).

4. Error Handling for Missing Directories: If the script cannot find the NSE script directory, it will exit with an error message.

Function erroring out because it assumes nfsls4 exists which is risky af. The condition if len(nfsls) > 4 ensures that nfsls[4] exists before attempting to access it. This prevents the IndexError from being raised when nfsls has fewer elements.

moved the get_host_ranges method into the sniffer class, ensuring that it can be accessed using self.get_host_ranges() as expected

expand_cidr Method:

This method takes a CIDR notation (like 10.185.80.0/24) and expands it into individual IP addresses using the ipaddress module.
It handles errors if an invalid CIDR is provided.
Modified sniff_hosts:

When CIDR notation is detected in the hosts string, it expands the range using the expand_cidr method. This generates a list of individual IP addresses that can be scanned.

self.nm.all_hosts(): This method returns a list of all hosts that Nmap scanned and returned results for. If the target host (host) is not in this list, it means Nmap couldn't get any information for that host.
Logging: A warning is logged when Nmap does not return results for a host, which could help in debugging why a particular host was skipped.
Graceful Return: If the host is not in the scan results, the method returns the host and the empty open_ports dictionary, skipping further processing.