# $Id$
#
# This file is part of the pydns project.
# Homepage: http://pydns.sourceforge.net
#
# This code is covered by the standard Python License. See LICENSE for details.
#
# routines for lazy people.
from . import Base
from . Base import ServerError
class NoDataError(IndexError): pass
class StatusError(IndexError): pass
def revlookup(name,timeout=30):
"convenience routine for doing a reverse lookup of an address"
if Base.defaults['server'] == []: Base.DiscoverNameServers()
names = revlookupall(name, timeout)
if not names: return None
return names[0] # return shortest name
def revlookupall(name,timeout=30):
"convenience routine for doing a reverse lookup of an address"
# FIXME: check for IPv6
a = name.split('.')
a.reverse()
b = '.'.join(a)+'.in-addr.arpa'
qtype='ptr'
names = dnslookup(b, qtype, timeout)
# this will return all records.
names.sort(key=str.__len__)
return names
def dnslookup(name,qtype,timeout=30):
"convenience routine to return just answer data for any query type"
if Base.defaults['server'] == []: Base.DiscoverNameServers()
result = Base.DnsRequest(name=name, qtype=qtype).req(timeout=timeout)
if result.header['status'] != 'NOERROR':
raise ServerError("DNS query status: %s" % result.header['status'],
result.header['rcode'])
elif len(result.answers) == 0 and Base.defaults['server_rotate']:
# check with next DNS server
result = Base.DnsRequest(name=name, qtype=qtype).req(timeout=timeout)
if result.header['status'] != 'NOERROR':
raise ServerError("DNS query status: %s" % result.header['status'],
result.header['rcode'])
return [x['data'] for x in result.answers]
def mxlookup(name,timeout=30):
"""
convenience routine for doing an MX lookup of a name. returns a
sorted list of (preference, mail exchanger) records
"""
qtype = 'mx'
l = dnslookup(name, qtype, timeout)
return l
#
# $Log$
# Revision 1.5.2.1.2.2 2011/03/23 01:42:07 customdesigned
# Changes from 2.3 branch
#
# Revision 1.5.2.1.2.1 2011/02/18 19:35:22 customdesigned
# Python3 updates from Scott Kitterman
#
# Revision 1.5.2.1 2007/05/22 20:23:38 customdesigned
# Lazy call to DiscoverNameServers
#
# Revision 1.5 2002/05/06 06:14:38 anthonybaxter
# reformat, move import to top of file.
#
# Revision 1.4 2002/03/19 12:41:33 anthonybaxter
# tabnannied and reindented everything. 4 space indent, no tabs.
# yay.
#
# Revision 1.3 2001/08/09 09:08:55 anthonybaxter
# added identifying header to top of each file
#
# Revision 1.2 2001/07/19 06:57:07 anthony
# cvs keywords added
#
#
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