def revlookup(name):
"convenience routine for doing a reverse lookup of an address"
if Base.defaults['server'] == []: Base.DiscoverNameServers()
a = string.split(name, '.')
a.reverse()
b = string.join(a, '.') + '.in-addr.arpa'
# this will only return one of any records returned.
return Base.DnsRequest(b, qtype='ptr').req().answers[0]['data']
def mxlookup(name):
"""
convenience routine for doing an MX lookup of a name. returns a
sorted list of (preference, mail exchanger) records
"""
if Base.defaults['server'] == []: Base.DiscoverNameServers()
a = Base.DnsRequest(name, qtype='mx').req().answers
l = map(lambda x: x['data'], a)
l.sort()
return l
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 revlookup(name):
"convenience routine for doing a reverse lookup of an address"
if Base.defaults['server'] == []: Base.DiscoverNameServers()
a = string.split(name, '.')
a.reverse()
b = string.join(a, '.') + '.in-addr.arpa'
# this will only return one of any records returned.
result = Base.DnsRequest(b, qtype='ptr').req()
if result.header['status'] != 'NOERROR':
raise StatusError("DNS query status: %s" % result.header['status'])
elif len(result.answers) == 0:
raise NoDataError("No PTR records for %s" % name)
else:
return result.answers[0]['data']
