def resolve(dns, nameserver):
global resolved
#additional args for ports
nameserver_ports = {}
for i in nameserver:
if ":" in i:
#if ports are different remove default port
ip, port = i.split(":")
port = int(port)
ind = nameserver.index(i)
nameserver[ind] = i.split(":")[0]
nameserver_ports[ip] = port
# if dnserver is not reachable
exetime = 0
try:
resolver = Resolver()
resolver._nameservers = nameserver
resolver.nameserver_ports = nameserver_ports
resolver.timeout = 10
#Starting time
c_time = datetime.now()
resolver.resolve('example.com', 'A')
#Time excuted
exetime = int((datetime.now() - c_time).total_seconds() * 1000)
except Exception as e:
#print(e)
pass
resolved[dns]['IPv4'] = exetime
