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?? __init__.py(1.3 KB)
?? __pycache__
?? _compat.py(1.28 KB)
?? dnssec.py(14.44 KB)
?? e164.py(3.07 KB)
?? edns.py(4.28 KB)
?? entropy.py(4.36 KB)
?? exception.py(4.52 KB)
?? flags.py(2.6 KB)
?? grange.py(1.93 KB)
?? hash.py(1.07 KB)
?? inet.py(3.17 KB)
?? ipv4.py(1.98 KB)
?? ipv6.py(5.17 KB)
?? message.py(42.12 KB)
?? name.py(28.74 KB)
?? namedict.py(3.59 KB)
?? node.py(5.91 KB)
?? opcode.py(2.48 KB)
?? query.py(19.18 KB)
?? rcode.py(3.03 KB)
?? rdata.py(14.65 KB)
?? rdataclass.py(3.18 KB)
?? rdataset.py(11.29 KB)
?? rdatatype.py(5.21 KB)
?? rdtypes
?? renderer.py(11.64 KB)
?? resolver.py(50.88 KB)
?? reversename.py(3.23 KB)
?? rrset.py(5.85 KB)
?? set.py(7.53 KB)
?? tokenizer.py(17.88 KB)
?? tsig.py(7.54 KB)
?? tsigkeyring.py(1.7 KB)
?? ttl.py(2.23 KB)
?? update.py(9.78 KB)
?? version.py(1.23 KB)
?? wiredata.py(3.64 KB)
?? zone.py(39.09 KB)

Editing: e164.py

# Copyright (C) 2006, 2007, 2009, 2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

"""DNS E.164 helpers

@var public_enum_domain: The DNS public ENUM domain, e164.arpa.
@type public_enum_domain: dns.name.Name object
"""

import dns.exception
import dns.name
import dns.resolver
from ._compat import string_types

public_enum_domain = dns.name.from_text('e164.arpa.')

def from_e164(text, origin=public_enum_domain):
    """Convert an E.164 number in textual form into a Name object whose
    value is the ENUM domain name for that number.
    @param text: an E.164 number in textual form.
    @type text: str
    @param origin: The domain in which the number should be constructed.
    The default is e164.arpa.
    @type origin: dns.name.Name object or None
    @rtype: dns.name.Name object
    """
    parts = [d for d in text if d.isdigit()]
    parts.reverse()
    return dns.name.from_text('.'.join(parts), origin=origin)

def to_e164(name, origin=public_enum_domain, want_plus_prefix=True):
    """Convert an ENUM domain name into an E.164 number.
    @param name: the ENUM domain name.
    @type name: dns.name.Name object.
    @param origin: A domain containing the ENUM domain name.  The
    name is relativized to this domain before being converted to text.
    @type origin: dns.name.Name object or None
    @param want_plus_prefix: if True, add a '+' to the beginning of the
    returned number.
    @rtype: str
    """
    if origin is not None:
        name = name.relativize(origin)
    dlabels = [d for d in name.labels if d.isdigit() and len(d) == 1]
    if len(dlabels) != len(name.labels):
        raise dns.exception.SyntaxError('non-digit labels in ENUM domain name')
    dlabels.reverse()
    text = b''.join(dlabels)
    if want_plus_prefix:
        text = b'+' + text
    return text

def query(number, domains, resolver=None):
    """Look for NAPTR RRs for the specified number in the specified domains.

e.g. lookup('16505551212', ['e164.dnspython.org.', 'e164.arpa.'])
    """
    if resolver is None:
        resolver = dns.resolver.get_default_resolver()
    e_nx = dns.resolver.NXDOMAIN()
    for domain in domains:
        if isinstance(domain, string_types):
            domain = dns.name.from_text(domain)
        qname = dns.e164.from_e164(number, domain)
        try:
            return resolver.query(qname, 'NAPTR')
        except dns.resolver.NXDOMAIN as e:
            e_nx += e
    raise e_nx

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