Resolver implementation for querying successive authoritative servers to lookup a record, starting from the root nameservers.
| Author | Jp Calderone todo:
robustify it
documentation
| |
| Class | Resolver | Resolver implements recursive lookup starting from a specified list of root servers. |
| Function | makePlaceholder | Undocumented |
| Class | DeferredResolver | Undocumented |
| Function | bootstrap | Lookup the root nameserver addresses using the given resolver |
| Class | _DummyController | A do-nothing DNS controller. This is useful when all messages received will be responses to previously issued queries. Anything else received will be ignored. |
Lookup the root nameserver addresses using the given resolver
Return a Resolver which will eventually become a root.Resolver instance that has references to all the root servers that we were able to look up.
| Parameters | resolver | The resolver instance which will be used to lookup the root nameserver addresses. (type: twisted.internet.interfaces.IResolverSimple) |
| resolverFactory | An optional callable which returns a resolver instance. It will passed as the resolverFactory argument to Resolver.__init__. (type: callable) | |
| Returns | A DeferredResolver which will be dynamically replaced with Resolver when the root nameservers have been looked up. | |