private void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
if (disposing)
{
foreach (AuthZone zone in _root)
{
AuthZoneInfo zoneInfo = new AuthZoneInfo(zone);
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
case AuthZoneType.Secondary:
case AuthZoneType.Stub:
case AuthZoneType.Forwarder:
zone.Dispose();
break;
}
}
}
_disposed = true;
}
private AuthZone CreateEmptyZone(AuthZoneInfo zoneInfo)
{
AuthZone zone;
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
zone = new PrimaryZone(_dnsServer, zoneInfo);
break;
case AuthZoneType.Secondary:
zone = new SecondaryZone(_dnsServer, zoneInfo);
break;
case AuthZoneType.Stub:
zone = new StubZone(_dnsServer, zoneInfo);
break;
case AuthZoneType.Forwarder:
zone = new ForwarderZone(zoneInfo);
break;
default:
throw new InvalidDataException("DNS zone type not supported.");
}
if (_root.TryAdd(zone))
{
return(zone);
}
throw new DnsServerException("Zone already exists: " + zoneInfo.Name);
}
public void WriteZoneTo(string domain, Stream s)
{
List <AuthZone> zones = _root.GetZoneWithSubDomainZones(domain);
if (zones.Count == 0)
{
throw new DnsServerException("Zone was not found: " + domain);
}
//serialize zone
BinaryWriter bW = new BinaryWriter(s);
bW.Write(Encoding.ASCII.GetBytes("DZ")); //format
bW.Write((byte)4); //version
//write zone info
AuthZoneInfo zoneInfo = new AuthZoneInfo(zones[0]);
if (zoneInfo.Internal)
{
throw new InvalidOperationException("Cannot save zones marked as internal.");
}
zoneInfo.WriteTo(bW);
//write all zone records
List <DnsResourceRecord> records = new List <DnsResourceRecord>();
foreach (AuthZone zone in zones)
{
records.AddRange(zone.ListAllRecords());
}
bW.Write(records.Count);
foreach (DnsResourceRecord record in records)
{
record.WriteTo(s);
DnsResourceRecordInfo rrInfo = record.Tag as DnsResourceRecordInfo;
if (rrInfo == null)
{
rrInfo = new DnsResourceRecordInfo(); //default info
}
rrInfo.WriteTo(bW);
}
}
public List <AuthZoneInfo> ListZones()
{
List <AuthZoneInfo> zones = new List <AuthZoneInfo>();
foreach (AuthZone zone in _root)
{
AuthZoneInfo zoneInfo = new AuthZoneInfo(zone);
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
case AuthZoneType.Secondary:
case AuthZoneType.Stub:
case AuthZoneType.Forwarder:
zones.Add(zoneInfo);
break;
}
}
return(zones);
}
public void LoadZoneFrom(Stream s)
{
BinaryReader bR = new BinaryReader(s);
if (Encoding.ASCII.GetString(bR.ReadBytes(2)) != "DZ")
{
throw new InvalidDataException("DnsServer zone file format is invalid.");
}
switch (bR.ReadByte())
{
case 2:
{
DnsResourceRecord[] records = new DnsResourceRecord[bR.ReadInt32()];
if (records.Length > 0)
{
DnsResourceRecord soaRecord = null;
for (int i = 0; i < records.Length; i++)
{
records[i] = new DnsResourceRecord(s);
if (records[i].Type == DnsResourceRecordType.SOA)
{
soaRecord = records[i];
}
}
if (soaRecord == null)
{
throw new InvalidDataException("Zone does not contain SOA record.");
}
//make zone info
AuthZoneType zoneType;
if (_dnsServer.ServerDomain.Equals((soaRecord.RDATA as DnsSOARecord).PrimaryNameServer, StringComparison.OrdinalIgnoreCase))
{
zoneType = AuthZoneType.Primary;
}
else
{
zoneType = AuthZoneType.Stub;
}
AuthZoneInfo zoneInfo = new AuthZoneInfo(records[0].Name, zoneType, false);
//create zone
AuthZone authZone = CreateEmptyZone(zoneInfo);
try
{
//load records
LoadRecords(authZone, records);
}
catch
{
DeleteZone(zoneInfo.Name);
throw;
}
//init zone
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
(authZone as PrimaryZone).NotifyNameServers();
break;
}
}
}
break;
case 3:
{
bool zoneDisabled = bR.ReadBoolean();
DnsResourceRecord[] records = new DnsResourceRecord[bR.ReadInt32()];
if (records.Length > 0)
{
DnsResourceRecord soaRecord = null;
for (int i = 0; i < records.Length; i++)
{
records[i] = new DnsResourceRecord(s);
records[i].Tag = new DnsResourceRecordInfo(bR);
if (records[i].Type == DnsResourceRecordType.SOA)
{
soaRecord = records[i];
}
}
if (soaRecord == null)
{
throw new InvalidDataException("Zone does not contain SOA record.");
}
//make zone info
AuthZoneType zoneType;
if (_dnsServer.ServerDomain.Equals((soaRecord.RDATA as DnsSOARecord).PrimaryNameServer, StringComparison.OrdinalIgnoreCase))
{
zoneType = AuthZoneType.Primary;
}
else
{
zoneType = AuthZoneType.Stub;
}
AuthZoneInfo zoneInfo = new AuthZoneInfo(records[0].Name, zoneType, zoneDisabled);
//create zone
AuthZone authZone = CreateEmptyZone(zoneInfo);
try
{
//load records
LoadRecords(authZone, records);
}
catch
{
DeleteZone(zoneInfo.Name);
throw;
}
//init zone
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
(authZone as PrimaryZone).NotifyNameServers();
break;
}
}
}
break;
case 4:
{
//read zone info
AuthZoneInfo zoneInfo = new AuthZoneInfo(bR);
//create zone
AuthZone authZone = CreateEmptyZone(zoneInfo);
//read all zone records
DnsResourceRecord[] records = new DnsResourceRecord[bR.ReadInt32()];
if (records.Length > 0)
{
for (int i = 0; i < records.Length; i++)
{
records[i] = new DnsResourceRecord(s);
records[i].Tag = new DnsResourceRecordInfo(bR);
}
try
{
//load records
LoadRecords(authZone, records);
}
catch
{
DeleteZone(zoneInfo.Name);
throw;
}
//init zone
switch (zoneInfo.Type)
{
case AuthZoneType.Primary:
(authZone as PrimaryZone).NotifyNameServers();
break;
case AuthZoneType.Secondary:
(authZone as SecondaryZone).RefreshZone();
break;
case AuthZoneType.Stub:
(authZone as StubZone).RefreshZone();
break;
}
}
}
break;
default:
throw new InvalidDataException("DNS Zone file version not supported.");
}
}
