--- /dev/null
+# $Id: lazy.py,v 1.5.2.4 2011/03/19 22:15:01 customdesigned Exp $
+#
+# 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.
+import Base
+import string
+
+from Base import DNSError
+
+def revlookup(name):
+ "convenience routine for doing a reverse lookup of an address"
+ names = revlookupall(name)
+ if not names: return None
+ return names[0] # return shortest name
+
+def revlookupall(name):
+ "convenience routine for doing a reverse lookup of an address"
+ # FIXME: check for IPv6
+ a = string.split(name, '.')
+ a.reverse()
+ b = string.join(a, '.')+'.in-addr.arpa'
+ names = dnslookup(b, qtype = 'ptr')
+ # this will return all records.
+ names.sort(key=str.__len__)
+ return names
+
+def dnslookup(name,qtype):
+ "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()
+ if result.header['status'] != 'NOERROR':
+ raise DNSError("DNS query status: %s" % result.header['status'])
+ elif len(result.answers) == 0 and Base.defaults['server_rotate']:
+ # check with next DNS server
+ result = Base.DnsRequest(name=name, qtype=qtype).req()
+ if result.header['status'] != 'NOERROR':
+ raise DNSError("DNS query status: %s" % result.header['status'])
+ return map(lambda x: x['data'],result.answers)
+
+def mxlookup(name):
+ """
+ convenience routine for doing an MX lookup of a name. returns a
+ sorted list of (preference, mail exchanger) records
+ """
+ l = dnslookup(name, qtype = 'mx')
+ l.sort()
+ return l
+
+#
+# $Log: lazy.py,v $
+# Revision 1.5.2.4 2011/03/19 22:15:01 customdesigned
+# Added rotation of name servers - SF Patch ID: 2795929
+#
+# Revision 1.5.2.3 2011/03/16 20:06:24 customdesigned
+# Expand convenience methods.
+#
+# Revision 1.5.2.2 2011/03/08 21:06:42 customdesigned
+# Address sourceforge patch requests 2981978, 2795932 to add revlookupall
+# and raise DNSError instead of IndexError on server fail.
+#
+# 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
+#
+#