+import argparse

+

+def get_ips_by_dns_lookup(target, port=None):

+    '''

+        this function takes the passed target and optional port and does a dns

+        lookup. it returns the ips that it finds to the caller.

+

+        :param target:  the URI that you'd like to get the ip address(es) for

+        :type target:   string

+        :param port:    which port do you want to do the lookup against?

+        :type port:     integer

+        :returns ips:   all of the discovered ips for the target

+        :rtype ips:     list of strings

+

+    '''

+    if not port:

+        port = 443

+

+    return list(map(lambda x: x[4][0], socket.getaddrinfo('{}.'.format(target),port,type=socket.SOCK_STREAM)))

+

+if __name__=="__main__":

+    parser = argparse.ArgumentParser(prog="Find all ips of a given domain")

+    parser.add_argument('-d', '--d', help='Domain', required=True)

+    parser.add_argument('-p', '--p', help='Port', required=False, default=80)

+    args = parser.parse_args()

+    

+    ips = get_ips_by_dns_lookup(target=args.d, port=args.p)