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# Unix SMB/CIFS implementation.
# backend code for provisioning DNS for a Samba4 server
#
# Copyright (C) Kai Blin <kai@samba.org> 2011
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""DNS-related provisioning"""
import os
import ldb
import samba
from samba.ndr import ndr_pack
from samba import read_and_sub_file
from samba.dcerpc import dnsp
class ARecord(dnsp.DnssrvRpcRecord):
def __init__(self, ip_addr, serial=1, ttl=3600):
super(ARecord, self).__init__()
self.wType = dnsp.DNS_TYPE_A
self.dwSerial = serial
self.dwTtlSeconds = ttl
self.data = ip_addr
class AAAARecord(dnsp.DnssrvRpcRecord):
def __init__(self, ip6_addr, serial=1, ttl=3600):
super(AAAARecord, self).__init__()
self.wType = dnsp.DNS_TYPE_AAAA
self.dwSerial = serial
self.dwTtlSeconds = ttl
self.data = ip6_addr
class NSRecord(dnsp.DnssrvRpcRecord):
def __init__(self, dns_server, serial=1, ttl=3600):
super(NSRecord, self).__init__()
self.wType = dnsp.DNS_TYPE_NS
self.dwSerial = serial
self.dwTtlSeconds = ttl
self.data = dns_server
class SOARecord(dnsp.DnssrvRpcRecord):
def __init__(self, mname, rname, serial=1, refresh=900, retry=600,
expire=86400, minimum=3600, ttl=3600):
super(SOARecord, self).__init__()
self.wType = dnsp.DNS_TYPE_SOA
self.dwSerial = serial
self.dwTtlSeconds = ttl
soa = dnsp.soa()
soa.serial = serial
soa.refresh = refresh
soa.retry = retry
soa.expire = expire
soa.mname = mname
soa.rname = rname
self.data = soa
class SRVRecord(dnsp.DnssrvRpcRecord):
def __init__(self, target, port, priority=0, weight=0, serial=1, ttl=3600):
super(SRVRecord, self).__init__()
self.wType = dnsp.DNS_TYPE_SRV
self.dwSerial = serial
self.dwTtlSeconds = ttl
srv = dnsp.srv()
srv.nameTarget = target
srv.wPort = port
srv.wPriority = priority
srv.wWeight = weight
self.data = srv
def setup_ad_dns(samdb, names, hostip=None, hostip6=None):
domaindn = names.domaindn
dnsdomain = names.dnsdomain.lower()
hostname = names.netbiosname.lower()
dnsname = "%s.%s" % (hostname, dnsdomain)
site = names.sitename
dns_ldif = os.path.join(samba.param.setup_dir(), "provision_dns_add.ldif")
dns_data = read_and_sub_file(dns_ldif, {
"DOMAINDN": domaindn,
"DNSDOMAIN" : dnsdomain
})
samdb.add_ldif(dns_data, ["relax:0"])
soa_subrecords = []
dns_records = []
# @ entry for the domain
at_soa_record = SOARecord(dnsname, "hostmaster.%s" % dnsdomain)
soa_subrecords.append(ndr_pack(at_soa_record))
at_ns_record = NSRecord(dnsname)
soa_subrecords.append(ndr_pack(at_ns_record))
if hostip is not None:
# A record
at_a_record = ARecord(hostip)
dns_records.append(ndr_pack(at_a_record))
if hostip6 is not None:
at_aaaa_record = AAAARecord(hostip6)
dns_records.append(ndr_pack(at_aaaa_record))
msg = ldb.Message(ldb.Dn(samdb, "DC=@,DC=%s,CN=MicrosoftDNS,CN=System,%s" %\
(dnsdomain, domaindn )))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = ldb.MessageElement(soa_subrecords + dns_records,
ldb.FLAG_MOD_ADD, "dnsRecord")
samdb.add(msg)
# _gc._tcp record
gc_tcp_record = SRVRecord(dnsname, 3268)
msg = ldb.Message(ldb.Dn(samdb,
"DC=_gc._tcp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(gc_tcp_record)]
samdb.add(msg)
# _gc._tcp.sitename._site record
msg = ldb.Message(ldb.Dn(samdb,
"DC=_gc._tcp.%s._sites,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(names.sitename, dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(gc_tcp_record)]
samdb.add(msg)
# _kerberos._tcp record
kerberos_record = SRVRecord(dnsname, 88)
msg = ldb.Message(ldb.Dn(samdb,
"DC=_kerberos._tcp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(kerberos_record)]
samdb.add(msg)
# _kerberos._tcp.sitename._site record
msg = ldb.Message(ldb.Dn(samdb,
"DC=_kerberos._tcp.%s._sites,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(site, dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(kerberos_record)]
samdb.add(msg)
# _kerberos._udp record
msg = ldb.Message(ldb.Dn(samdb,
"DC=_kerberos._udp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(kerberos_record)]
samdb.add(msg)
# _kpasswd._tcp record
kpasswd_record = SRVRecord(dnsname, 464)
msg = ldb.Message(ldb.Dn(samdb,
"DC=_kpasswd._tcp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(kpasswd_record)]
samdb.add(msg)
# _kpasswd._udp record
msg = ldb.Message(ldb.Dn(samdb,
"DC=_kpasswd._udp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(kpasswd_record)]
samdb.add(msg)
# _ldap._tcp record
ldap_record = SRVRecord(dnsname, 389)
msg = ldb.Message(ldb.Dn(samdb,
"DC=_ldap._tcp,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(ldap_record)]
samdb.add(msg)
# _ldap._tcp.sitename._site record
msg = ldb.Message(ldb.Dn(samdb,
"DC=_ldap._tcp.%s._site,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(site, dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(ldap_record)]
samdb.add(msg)
# _msdcs record
msdcs_record = NSRecord(dnsname)
msg = ldb.Message(ldb.Dn(samdb,
"DC=_msdcs,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = [ndr_pack(msdcs_record)]
samdb.add(msg)
# the host's own record
# Only do this if there's IP addresses to set up.
# This is a bit weird, but the samba4.blackbox.provision.py test apparently
# doesn't set up any IPs
if len(dns_records) > 0:
msg = ldb.Message(ldb.Dn(samdb,
"DC=%s,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(hostname, dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = ldb.MessageElement(dns_records,
ldb.FLAG_MOD_ADD, "dnsRecord")
samdb.add(msg)
# DomainDnsZones record
msg = ldb.Message(ldb.Dn(samdb,
"DC=DomainDnsZones,DC=%s,CN=MicrosoftDNS,CN=System,%s" % \
(dnsdomain, domaindn)))
msg["objectClass"] = ["top", "dnsNode"]
msg["dnsRecord"] = ldb.MessageElement(dns_records,
ldb.FLAG_MOD_ADD, "dnsRecord")
samdb.add(msg)
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