public IPEndPoint[] GetEndpointsValue()
{
if (ServerArg.HasValue())
{
var values = ServerArg.Values.Select(p => p.Split('#').ToArray());
var result = new List <IPEndPoint>();
foreach (var serverPair in values)
{
var server = serverPair[0];
var port = serverPair.Length > 1 ? int.Parse(serverPair[1]) : 53;
IPAddress ip;
if (!IPAddress.TryParse(server, out ip))
{
var lookup = new LookupClient();
var lResult = lookup.QueryAsync(server, QueryType.A).Result;
ip = lResult.Answers.OfType <ARecord>().FirstOrDefault()?.Address;
}
if (ip == null)
{
throw new ArgumentException($"Invalid address or hostname '{server}'.");
}
result.Add(new IPEndPoint(ip, port));
}
return(result.ToArray());
}
else
{
return(NameServer.ResolveNameServers().ToArray());
}
}
static STUNDns()
{
var nameServers = NameServer.ResolveNameServers(skipIPv6SiteLocal: true, fallbackToGooglePublicDns: true);
LookupClientOptions clientOptions = new LookupClientOptions(nameServers.ToArray())
{
Retries = DNS_RETRIES_PER_SERVER,
Timeout = TimeSpan.FromSeconds(DNS_TIMEOUT_SECONDS),
UseCache = true,
UseTcpFallback = false
};
_lookupClient = new LookupClient(clientOptions);
}
static SIPDns()
{
var nameServers = NameServer.ResolveNameServers(skipIPv6SiteLocal: true, fallbackToGooglePublicDns: true);
LookupClientOptions clientOptions = new LookupClientOptions(nameServers.ToArray())
{
Retries = DNS_RETRIES_PER_SERVER,
Timeout = TimeSpan.FromSeconds(DNS_TIMEOUT_SECONDS),
UseCache = true,
// TODO: Re-enable when DnsClient adds cache querying.
//UseCacheForFailures = true,
};
_lookupClient = new LookupClient(clientOptions);
}
static SIPDns()
{
var nameServers = NameServer.ResolveNameServers(skipIPv6SiteLocal: true, fallbackToGooglePublicDns: true);
LookupClientOptions clientOptions = new LookupClientOptions(nameServers.ToArray())
{
Retries = DNS_RETRIES_PER_SERVER,
Timeout = TimeSpan.FromSeconds(DNS_TIMEOUT_SECONDS),
UseCache = true,
CacheFailedResults = true,
FailedResultsCacheDuration = TimeSpan.FromSeconds(CACHE_FAILED_RESULTS_DURATION)
};
_lookupClient = new LookupClient(clientOptions);
}
private List <IPEndPoint> GetDnsServer()
{
List <IPEndPoint> dnsServers = new List <IPEndPoint>();
if (UseCustomDNSServer)
{
foreach (var dnsServer in CustomDNSServer.Servers)
{
dnsServers.Add(new IPEndPoint(IPAddress.Parse(dnsServer), CustomDNSServer.Port));
}
}
else
{
foreach (var dnsServer in NameServer.ResolveNameServers(true, false))
{
dnsServers.Add(dnsServer);
}
}
return(dnsServers);
}
public IReadOnlyCollection <IPEndPoint> NameServers()
{
return(NameServer.ResolveNameServers(true, false).ToArray());
}
public IReadOnlyCollection <IPEndPoint> NameServers()
{
return(NameServer.ResolveNameServers(true, false).Select(s => new IPEndPoint(IPAddress.Parse(s.Address), s.Port)).ToArray());
}