Container for DNS label Supports IDNA encoding for unicode domain names >>> l1 = DNSLabel("aaa.bbb.ccc.") >>> l2 = DNSLabel([b"aaa"

Convenience wrapper for socketserver instance allowing either UDP/TCP server to be started in blocking more or as a backgroun

Main DNS class - corresponds to DNS packet & comprises DNSHeader, DNSQuestion and RR sections (answer,ns,ar) >>> d = DNSRec

DNSHeader section

The class provides a default set of logging functions for the various stages of the request handled by a DNSServer instance which are

Bi-directional mapping between code/text. Initialised using: name: Used for exceptions dict: Dict mapp

DNSQuestion section

Parse Dig output

DNS Resource Record Contains RR header and RD (resource data) instance

Example lexer which will split input stream into words (respecting quotes) To emit SPACE tokens: self.spacetok = ('SPACE',No

Extends Buffer to provide DNS name encoding/decoding (with caching) # Needed for Python 2/3 doctest compatibility >>> def p(s): ...

A simple data buffer - supports packing/unpacking in struct format # Needed for Python 2/3 doctest compatibility >>> def p(s): ...

EDNSOption pseudo-section Very rudimentary support for EDNS0 options however this has not been tested due to a lack of data

Respond with fixed response to all requests

Intercepting resolver Proxy requests to upstream server optionally intercepting requests matching local records

Proxy resolver - passes all requests to upstream DNS server and returns response Note that the request/response will be each

Example dynamic resolver. Maps DNS labels to shell commands and returns result as TXT record (Note: No context is passed to

DNS TXT record. Pass in either a single string, or a tuple/list of strings. >>> TXT('txtvers=1') "txtvers=1" >>> TXT

Zone file parser >>> z = ZoneParser("www.example.com. 60 IN A 1.2.3.4") >>> list(z.parse()) [<DNS RR: 'www.example.c

Simple fixed zone file resolver.

Basic support for AAAA record - accepts IPv6 address data as either a tuple of 16 bytes or in text format

Base resolver implementation. Provides 'resolve' method which is called by DNSHandler with the decode request (DNSRecord instance)

Handler for socketserver. Transparently handles both TCP/UDP requests (TCP requests have length prepended) and hands off lookup to re

ENDS0 pseudo-record Wrapper around the ENDS0 support in RR to make it more convenient to create EDNS0 pseudo-record - this

Simple Lexer base class. Provides basic lexer framework and helper functionality (read/peek/pushback etc) Each state is imp

Modify DNSHandler logic (get_reply method) to send directly to upstream DNS server rather then decoding/encoding packet and

Base RD object - also used as placeholder for unknown RD types To create a new RD type subclass this and add to RDMAP (below)

Test lexing from infinite stream. Extract strings of letters/numbers from /dev/urandom >>> import itertools,sys >>