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- Added generic EDNS code for registering known EDNS option codes,

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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: file:///svn/unbound/trunk@3947 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
George Thessalonikefs
2016-12-06 13:42:51 +00:00
parent 3e1ff464f1
commit 7b948b0647
59 changed files with 3393 additions and 732 deletions
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pythonmod/doc/examples/example2.rst
+23 -20
View File
@@ -1,12 +1,14 @@
Response generation
=====================
===================
This example shows how to handle queries and generate response packet.
.. note::
If the python module is the first module and validator module is enabled (``module-config: "python validator iterator"``),
a return_msg security flag has to be set at least to 2. Leaving security flag untouched causes that the
response will be refused by unbound worker as unbound will consider it as non-valid response.
If the python module is the first module and validator module is enabled
(``module-config: "python validator iterator"``), a return_msg security flag
has to be set at least to 2. Leaving security flag untouched causes that the
response will be refused by unbound worker as unbound will consider it as
non-valid response.
Complete source code
--------------------
@@ -27,20 +29,21 @@ Query for a A record ending with .localdomain
Dig produces the following output::
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48426
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;test.xxx.localdomain. IN A
;; ANSWER SECTION:
test.xxx.localdomain. 10 IN A 127.0.0.1
;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jan 01 12:46:02 2009
;; MSG SIZE rcvd: 54
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48426
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
As we handle (override) in python module only queries ending with "localdomain.", the unboud can still resolve host names.
;; QUESTION SECTION:
;test.xxx.localdomain. IN A
;; ANSWER SECTION:
test.xxx.localdomain. 10 IN A 127.0.0.1
;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Jan 01 12:46:02 2009
;; MSG SIZE rcvd: 54
As we handle (override) in the python module only queries ending with
``localdomain.``, unboud can still resolve host names.