public ClientFullyQualifiedDomainNameOption(ClientFullyQualifiedDomainNameFlags flags, byte rcode1, byte rcode2, string domainName)
: base(DhcpOptionCode.ClientFullyQualifiedDomainName)
{
_flags = flags;
_rcode1 = rcode1;
_rcode2 = rcode2;
_domainName = domainName;
}
private ClientFullyQualifiedDomainNameOption GetClientFullyQualifiedDomainNameOption(DhcpMessage request)
{
ClientFullyQualifiedDomainNameFlags responseFlags = ClientFullyQualifiedDomainNameFlags.None;
if (request.ClientFullyQualifiedDomainName.Flags.HasFlag(ClientFullyQualifiedDomainNameFlags.EncodeUsingCanonicalWireFormat))
{
responseFlags |= ClientFullyQualifiedDomainNameFlags.EncodeUsingCanonicalWireFormat;
}
if (request.ClientFullyQualifiedDomainName.Flags.HasFlag(ClientFullyQualifiedDomainNameFlags.NoDnsUpdate))
{
responseFlags |= ClientFullyQualifiedDomainNameFlags.ShouldUpdateDns;
responseFlags |= ClientFullyQualifiedDomainNameFlags.OverrideByServer;
}
else if (request.ClientFullyQualifiedDomainName.Flags.HasFlag(ClientFullyQualifiedDomainNameFlags.ShouldUpdateDns))
{
responseFlags |= ClientFullyQualifiedDomainNameFlags.ShouldUpdateDns;
}
else
{
responseFlags |= ClientFullyQualifiedDomainNameFlags.ShouldUpdateDns;
responseFlags |= ClientFullyQualifiedDomainNameFlags.OverrideByServer;
}
string clientDomainName;
if (string.IsNullOrWhiteSpace(request.ClientFullyQualifiedDomainName.DomainName))
{
//client domain empty and expects server for a fqdn domain name
if (request.HostName == null)
{
return(null); //server unable to decide a name for client
}
clientDomainName = request.HostName.HostName + "." + _domainName;
}
else if (request.ClientFullyQualifiedDomainName.DomainName.Contains("."))
{
//client domain is fqdn
if (request.ClientFullyQualifiedDomainName.DomainName.EndsWith("." + _domainName, StringComparison.OrdinalIgnoreCase))
{
clientDomainName = request.ClientFullyQualifiedDomainName.DomainName;
}
else
{
string[] parts = request.ClientFullyQualifiedDomainName.DomainName.Split('.');
clientDomainName = parts[0] + "." + _domainName;
}
}
else
{
//client domain is just hostname
clientDomainName = request.ClientFullyQualifiedDomainName.DomainName + "." + _domainName;
}
return(new ClientFullyQualifiedDomainNameOption(responseFlags, 255, 255, clientDomainName));
}
protected override void ParseOptionValue(Stream s)
{
if (s.Length < 3)
{
throw new InvalidDataException();
}
int flags = s.ReadByte();
if (flags < 0)
{
throw new EndOfStreamException();
}
_flags = (ClientFullyQualifiedDomainNameFlags)flags;
int rcode;
rcode = s.ReadByte();
if (rcode < 0)
{
throw new EndOfStreamException();
}
_rcode1 = (byte)rcode;
rcode = s.ReadByte();
if (rcode < 0)
{
throw new EndOfStreamException();
}
_rcode2 = (byte)rcode;
if (_flags.HasFlag(ClientFullyQualifiedDomainNameFlags.EncodeUsingCanonicalWireFormat))
{
_domainName = DnsDatagram.DeserializeDomainName(s);
}
else
{
_domainName = Encoding.ASCII.GetString(s.ReadBytes((int)s.Length - 3));
}
}
