4812f02dd0
bypassing the cache response stage and uniquifying mesh states. Four EDNS option lists were added to module_qstate (module_qstate.edns_opts_*) to store EDNS options from/to front/back side. - Added two flags to module_qstate (no_cache_lookup, no_cache_store) that control the modules' cache interactions. - Added code for registering inplace callback functions. The registered functions can be called just before replying with local data or Chaos, replying from cache, replying with SERVFAIL, replying with a resolved query, sending a query to a nameserver. The functions can inspect the available data and maybe change response/query related data (i.e. append EDNS options). - Updated Python module for the above. - Updated Python documentation. git-svn-id: https://unbound.nlnetlabs.nl/svn/trunk@3947 be551aaa-1e26-0410-a405-d3ace91eadb9
35 lines
1002 B
ReStructuredText
35 lines
1002 B
ReStructuredText
.. _example_resolver_only:
|
|
|
|
Resolver only
|
|
=============
|
|
|
|
This example program shows how to perform DNS resolution only.
|
|
Unbound contains two basic modules: resolver and validator.
|
|
In case, the validator is not necessary, the validator module can be turned off
|
|
using "module-config" option.
|
|
This option contains a list of module names separated by the space char. This
|
|
list determined which modules should be employed and in what order.
|
|
|
|
Source code
|
|
-----------
|
|
|
|
::
|
|
|
|
#!/usr/bin/python
|
|
import os
|
|
from unbound import ub_ctx,RR_TYPE_A,RR_CLASS_IN
|
|
|
|
ctx = ub_ctx()
|
|
ctx.set_option("module-config:","iterator")
|
|
ctx.resolvconf("/etc/resolv.conf")
|
|
|
|
status, result = ctx.resolve("www.google.com", RR_TYPE_A, RR_CLASS_IN)
|
|
if status == 0 and result.havedata:
|
|
|
|
print "Result:", result.data.address_list
|
|
|
|
.. note::
|
|
The :meth:`unbound.ub_ctx.set_option` method must be used before the first
|
|
resolution (i.e. before :meth:`unbound.ub_ctx.resolve` or
|
|
:meth:`unbound.ub_ctx.resolve_async` call).
|