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PrimaryZone: implemented soa serial date scheme support.

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This commit is contained in:
Shreyas Zare
2023-04-23 16:20:35 +05:30
parent 6554367ad7
commit 79ae0c5632
1 changed files with 75 additions and 17 deletions
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92
DnsServerCore/Dns/Zones/PrimaryZone.cs
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@@ -2602,26 +2602,14 @@ namespace DnsServerCore.Dns.Zones
DnsResourceRecord addSoaRecord = addedRecords[0];
DnsSOARecordData addSoa = addSoaRecord.RDATA as DnsSOARecordData;
uint serial = oldSoa.Serial;
if (addSoa.Serial > serial)
serial = addSoa.Serial;
else if (serial < uint.MaxValue)
serial++;
else
serial = 1;
uint serial = GetNewSerial(oldSoa.Serial, addSoa.Serial, addSoaRecord.GetAuthRecordInfo().UseSoaSerialDateScheme);
newSoaRecord = new DnsResourceRecord(_name, DnsResourceRecordType.SOA, DnsClass.IN, addSoaRecord.TTL, new DnsSOARecordData(addSoa.PrimaryNameServer, addSoa.ResponsiblePerson, serial, addSoa.Refresh, addSoa.Retry, addSoa.Expire, addSoa.Minimum)) { Tag = addSoaRecord.Tag };
addedRecords = null;
}
else
{
uint serial = oldSoa.Serial;
if (serial < uint.MaxValue)
serial++;
else
serial = 1;
uint serial = GetNewSerial(oldSoa.Serial, 0, oldSoaRecord.GetAuthRecordInfo().UseSoaSerialDateScheme);
newSoaRecord = new DnsResourceRecord(_name, DnsResourceRecordType.SOA, DnsClass.IN, oldSoaRecord.TTL, new DnsSOARecordData(oldSoa.PrimaryNameServer, oldSoa.ResponsiblePerson, serial, oldSoa.Refresh, oldSoa.Retry, oldSoa.Expire, oldSoa.Minimum)) { Tag = oldSoaRecord.Tag };
}
@@ -2702,6 +2690,62 @@ namespace DnsServerCore.Dns.Zones
}
}
private static uint GetNewSerial(uint oldSerial, uint updateSerial, bool useSoaSerialDateScheme)
{
if (useSoaSerialDateScheme)
{
string strOldSerial = oldSerial.ToString();
string strOldSerialDate = null;
byte counter = 0;
if (strOldSerial.Length == 10)
{
//parse old serial
strOldSerialDate = strOldSerial.Substring(0, 8);
counter = byte.Parse(strOldSerial.Substring(8));
}
string strSerialDate = DateTime.UtcNow.ToString("yyyyMMdd");
if (strOldSerialDate is null)
{
//transitioning to date scheme
return uint.Parse(strSerialDate + counter.ToString().PadLeft(2, '0'));
}
else if (strSerialDate.Equals(strOldSerialDate))
{
//same date
if (counter < 99)
{
counter++;
return uint.Parse(strSerialDate + counter.ToString().PadLeft(2, '0'));
}
else
{
//more than 100 increments
return uint.Parse(strSerialDate + counter.ToString().PadLeft(2, '0')) + 1;
}
}
else if (uint.Parse(strSerialDate) > uint.Parse(strOldSerialDate))
{
//later date
return uint.Parse(strSerialDate + "00");
}
}
//default
uint serial = oldSerial;
if (updateSerial > serial)
serial = updateSerial;
else if (serial < uint.MaxValue)
serial++;
else
serial = 1;
return serial;
}
#endregion
#region public
@@ -2749,10 +2793,24 @@ namespace DnsServerCore.Dns.Zones
if (newSoa.Refresh > newSoa.Expire)
throw new DnsServerException("Failed to set records: SOA REFRESH cannot be greater than SOA EXPIRE.");
//remove any record info except comments
string comments = newSoaRecord.GetAuthRecordInfo().Comments;
//remove any record info except serial date scheme and comments
bool useSoaSerialDateScheme;
string comments;
{
AuthRecordInfo recordInfo = newSoaRecord.GetAuthRecordInfo();
useSoaSerialDateScheme = recordInfo.UseSoaSerialDateScheme;
comments = recordInfo.Comments;
}
newSoaRecord.Tag = null; //remove old record info
newSoaRecord.GetAuthRecordInfo().Comments = comments;
{
AuthRecordInfo recordInfo = newSoaRecord.GetAuthRecordInfo();
recordInfo.UseSoaSerialDateScheme = useSoaSerialDateScheme;
recordInfo.Comments = comments;
}
uint oldSoaMinimum = GetZoneSoaMinimum();