ZeroconfHost GetOrCreateZeroconfHost(NSNetService service)
{
ZeroconfHost host;
string hostKey = GetZeroconfHostKey(service);
lock (zeroconfHostDict)
{
if (!zeroconfHostDict.TryGetValue(hostKey, out host))
{
host = new ZeroconfHost();
host.DisplayName = service.Name;
List <string> ipAddrList = new List <string>();
foreach (NSData address in service.Addresses)
{
Sockaddr saddr = Sockaddr.CreateSockaddr(address.Bytes);
IPAddress ipAddr = Sockaddr.CreateIPAddress(saddr);
if (ipAddr != null)
{
ipAddrList.Add(ipAddr.ToString());
}
}
host.IPAddresses = ipAddrList;
host.Id = host.IPAddress;
zeroconfHostDict[hostKey] = host;
}
}
return(host);
}
static ZeroconfHost ResponseToZeroconf(Response response, string remoteAddress)
{
var z = new ZeroconfHost();
// Get the Id and IP address from the A record
var aRecord = response.Answers
.Select(r => r.RECORD)
.OfType <RecordA>()
.FirstOrDefault();
if (aRecord != null)
{
z.Id = aRecord.RR.NAME.Split('.')[0];
z.IPAddress = aRecord.Address;
}
else
{
// Is this valid?
z.Id = remoteAddress;
z.IPAddress = remoteAddress;
}
var dispNameSet = false;
foreach (var ptrRec in response.RecordsPTR)
{
// set the display name if needed
if (!dispNameSet)
{
z.DisplayName = ptrRec.PTRDNAME.Split('.')[0];
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,
Port = srvRec.PORT
};
// 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);
}
private static ZeroconfHost ResponseToZeroconf(Response response, string remoteAddress)
{
var z = new ZeroconfHost();
// Get the Id and IP address from the A record
var aRecord = response.Additionals
.Select(r => r.RECORD)
.OfType<RecordA>()
.FirstOrDefault();
if (aRecord != null)
{
z.Id = aRecord.RR.NAME.Split('.')[0];
z.IPAddress = aRecord.Address;
}
else
{
// Is this valid?
z.Id = remoteAddress;
z.IPAddress = remoteAddress;
}
var dispNameSet = false;
var services = response.Answers
.Select(r => r.RECORD)
.OfType<RecordPTR>();
foreach (var ptrRec in services)
{
// set the display name if needed
if (!dispNameSet)
{
z.DisplayName = ptrRec.PTRDNAME.Split('.')[0];
dispNameSet = true;
}
// Get the matching service records
var serviceRecords = response.Additionals
.Where(r => r.NAME == ptrRec.PTRDNAME)
.Select(r => r.RECORD)
.ToList();
var srvRec = serviceRecords.OfType<RecordSRV>().FirstOrDefault();
if (srvRec == null)
continue; // Missing the SRV record, not valid
var svc = new Service
{
Name = ptrRec.RR.NAME,
Port = srvRec.PORT
};
// There may be 0 or more text records - property sets
foreach (var txtRec in serviceRecords.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;
}
static ZeroconfHost ResponseToZeroconf(Response response, string remoteAddress, ResolveOptions options)
{
var z = new ZeroconfHost
{
IPAddresses = response.Answers
.Select(r => r.RECORD)
.OfType <RecordA>()
.Concat(response.Additionals
.Select(r => r.RECORD)
.OfType <RecordA>())
.Select(aRecord => aRecord.Address)
.Distinct()
.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.Split('.')[0];
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,
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);
}
static ZeroconfHost ResponseToZeroconf(Response response, string remoteAddress)
{
var z = new ZeroconfHost
{
IPAddresses = response.Answers
.Select(r => r.RECORD)
.OfType <RecordA>()
.Concat(response.Additionals
.Select(r => r.RECORD)
.OfType <RecordA>())
.Select(aRecord => aRecord.Address)
.Distinct()
.ToList(),
};
z.Id = z.IPAddresses.FirstOrDefault() ?? remoteAddress;
var dispNameSet = false;
foreach (var ptrRec in response.RecordsPTR)
{
z.AddDomainName(ptrRec.PTRDNAME);
// set the display name if needed
if (!dispNameSet)
{
z.DisplayName = ptrRec.PTRDNAME.Split('.')[0];
dispNameSet = true;
}
}
if (response.RecordsRR.Where(x => x.Type == Heijden.DNS.Type.SRV).FirstOrDefault()?.RECORD is RecordSRV srvRec)
{
var svc = new Service
{
Name = srvRec.RR.NAME,
Port = srvRec.PORT,
Ttl = (int)srvRec.RR.TTL,
};
z.AddDomainName(srvRec.RR.NAME);
if (!dispNameSet)
{
z.DisplayName = srvRec.RR.NAME.Split('.')[0];
dispNameSet = true;
}
z.AddService(svc);
}
if (response.RecordsRR.Where(x => x.Type == Heijden.DNS.Type.TXT).FirstOrDefault()?.RECORD is RecordTXT txtRec)
{
var txr = new TextRecord
{
Name = txtRec.RR.NAME,
Ttl = (int)txtRec.RR.TTL,
};
z.AddDomainName(txtRec.RR.NAME);
if (!dispNameSet)
{
z.DisplayName = txtRec.RR.NAME.Split('.')[0];
dispNameSet = true;
}
foreach (var txt in txtRec.TXT)
{
var split = txt.Split(new[] { '=' }, 2);
if (split.Length == 1)
{
if (!string.IsNullOrWhiteSpace(split[0]))
{
txr.AddProperty(split[0], null);
}
}
else
{
txr.AddProperty(split[0], split[1].TrimEnd(new[] { '\0' }));
}
}
z.AddTextRecord(txr);
}
return(z);
}
void RefreshZeroconfHostDict()
{
// Do not walk discoveredServiceDict[] directly
// If a NSNetService is in discoveredServiceDict[], it was resolved successfully before it was added
List <NSNetService> nsNetServiceList = new List <NSNetService>();
lock (discoveredServiceDict)
{
nsNetServiceList.AddRange(discoveredServiceDict.Values);
}
// For each NSNetService, create a ZeroconfHost record
foreach (var nsNetService in nsNetServiceList)
{
Debug.WriteLine($"{nameof(ReturnZeroconfHostResults)}: Name {nsNetService.Name} Type {nsNetService.Type} Domain {nsNetService.Domain} " +
$"HostName {nsNetService.HostName} Port {nsNetService.Port}");
// Obtain or create ZeroconfHost
ZeroconfHost host = GetOrCreateZeroconfHost(nsNetService);
// Add service to ZeroconfHost record
Service svc = new Service();
svc.Name = GetNsNetServiceName(nsNetService);
svc.Port = (int)nsNetService.Port;
// svc.Ttl = is not available
NSData txtRecordData = nsNetService.GetTxtRecordData();
if (txtRecordData != null)
{
NSDictionary txtDict = NSNetService.DictionaryFromTxtRecord(txtRecordData);
if (txtDict != null)
{
if (txtDict.Count > 0)
{
foreach (var key in txtDict.Keys)
{
Debug.WriteLine($"{nameof(ReturnZeroconfHostResults)}: Key {key} Value {txtDict[key].ToString()}");
}
Dictionary <string, string> propertyDict = new Dictionary <string, string>();
foreach (var key in txtDict.Keys)
{
propertyDict[key.ToString()] = txtDict[key].ToString();
}
svc.AddPropertySet(propertyDict);
}
else
{
Debug.WriteLine($"{nameof(ReturnZeroconfHostResults)}: Service.DictionaryFromTxtRecord has 0 entries");
}
}
else
{
Debug.WriteLine($"{nameof(ReturnZeroconfHostResults)}: Service.DictionaryFromTxtRecord returned null");
}
}
host.AddService(svc);
}
}
