/// <summary>
/// Resolves available ZeroConf distinct services continuously until disposed
/// </summary>
public static IObservable <IZeroconfHost> ResolveContinuousDistinct(ResolveOptions options)
{
var inner = Resolve(options);
return(inner.Repeat().Distinct());
}
static ZeroconfHost ResponseToZeroconf(Response response, string remoteAddress, ResolveOptions options)
{
var ipv4Adresses = response.Answers
.Select(r => r.RECORD)
.OfType <RecordA>()
.Concat(response.Additionals
.Select(r => r.RECORD)
.OfType <RecordA>())
.Select(aRecord => aRecord.Address)
.Distinct()
.ToList();
var ipv6Adresses = response.Answers
.Select(r => r.RECORD)
.OfType <RecordAAAA>()
.Concat(response.Additionals
.Select(r => r.RECORD)
.OfType <RecordAAAA>())
.Select(aRecord => aRecord.Address)
.Distinct()
.ToList();
var z = new ZeroconfHost
{
IPAddresses = ipv4Adresses.Concat(ipv6Adresses).ToList()
};
z.Id = z.IPAddresses.FirstOrDefault() ?? remoteAddress;
var dispNameSet = false;
foreach (var ptrRec in response.RecordsPTR)
{
// set the display name if needed
if (!dispNameSet &&
(options == null ||
(options != null &&
options.Protocols.Contains(ptrRec.RR.NAME))))
{
z.DisplayName = ptrRec.PTRDNAME.Replace($".{ptrRec.RR.NAME}", "");
dispNameSet = true;
}
// Get the matching service records
var responseRecords = response.RecordsRR
.Where(r => r.NAME == ptrRec.PTRDNAME)
.Select(r => r.RECORD)
.ToList();
var srvRec = responseRecords.OfType <RecordSRV>().FirstOrDefault();
if (srvRec == null)
{
continue; // Missing the SRV record, not valid
}
var svc = new Service
{
Name = ptrRec.RR.NAME,
ServiceName = srvRec.RR.NAME,
Port = srvRec.PORT,
Ttl = (int)srvRec.RR.TTL,
};
// There may be 0 or more text records - property sets
foreach (var txtRec in responseRecords.OfType <RecordTXT>())
{
var set = new Dictionary <string, string>();
foreach (var txt in txtRec.TXT)
{
var split = txt.Split(new[] { '=' }, 2);
if (split.Length == 1)
{
if (!string.IsNullOrWhiteSpace(split[0]))
{
set[split[0]] = null;
}
}
else
{
set[split[0]] = split[1];
}
}
svc.AddPropertySet(set);
}
z.AddService(svc);
}
return(z);
}
