On Wed, Aug 5, 2020, at 3:59 PM, Rob Gormley wrote:
> But I tried with dns.Record_NULL to generate an NXDOMAIN-like response
> without success. How can I implement this?
You need to fail with AuthoritativeDomainError. The pieces go together
something like this:
from twisted.names import dns, client, common
class MyResolver(ResolverBase):
def _lookup(self, name, cls, record_type, timeout):
# This says "my resolver can't handle that name, try somewhere else".
# DNSServerFactory will try the caches or recurse to clients.
return defer.fail(dns.DomainError(name))
# This says "that name definitely doesn't exist".
# The client will get NXDOMAIN
return defer.fail(dns.AuthoritativeDomainError(name))
factory = DNSServerFactory(
authorities=[MyResolver()],
caches=[...],
clients=[client.Resolver()], # used to recurse
)
---Tom_______________________________________________
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