public static void DNSSRVRecordLookup(SIPSchemesEnum scheme, SIPProtocolsEnum protocol, string host, bool async, ref SIPDNSLookupResult lookupResult)
{
SIPServicesEnum reqdNAPTRService = SIPServicesEnum.none;
if (scheme == SIPSchemesEnum.sip && protocol == SIPProtocolsEnum.udp)
{
reqdNAPTRService = SIPServicesEnum.sipudp;
}
else if (scheme == SIPSchemesEnum.sip && protocol == SIPProtocolsEnum.tcp)
{
reqdNAPTRService = SIPServicesEnum.siptcp;
}
else if (scheme == SIPSchemesEnum.sips && protocol == SIPProtocolsEnum.tcp)
{
reqdNAPTRService = SIPServicesEnum.sipstcp;
}
else if (scheme == SIPSchemesEnum.sip && protocol == SIPProtocolsEnum.tls)
{
reqdNAPTRService = SIPServicesEnum.siptls;
}
// If there are NAPTR records available see if there is a matching one for the SIP scheme and protocol required.
SIPDNSServiceResult naptrService = null;
if (lookupResult.SIPNAPTRResults != null && lookupResult.SIPNAPTRResults.Count > 0)
{
if (reqdNAPTRService != SIPServicesEnum.none && lookupResult.SIPNAPTRResults.ContainsKey(reqdNAPTRService))
{
naptrService = lookupResult.SIPNAPTRResults[reqdNAPTRService];
}
}
// Construct the SRV target to lookup depending on whether an NAPTR record was available or not.
string srvLookup = null;
if (naptrService != null)
{
srvLookup = naptrService.Data;
}
else
{
srvLookup = "_" + scheme.ToString() + "._" + protocol.ToString() + "." + host;
}
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record lookup requested for " + srvLookup + ".", null));
DNSResponse srvRecordResponse = DNSManager.Lookup(srvLookup, DNSQType.SRV, DNS_LOOKUP_TIMEOUT, null, true, async);
if (srvRecordResponse == null && async)
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record lookup pending for " + srvLookup + ".", null));
lookupResult.Pending = true;
}
else if (srvRecordResponse.Timedout)
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record lookup timed out for " + srvLookup + ".", null));
lookupResult.SRVTimedoutAt = DateTime.Now;
}
else if (srvRecordResponse.Error != null)
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record lookup for " + srvLookup + " returned error of " + lookupResult.LookupError + ".", null));
}
else if (srvRecordResponse.Error == null && srvRecordResponse.RecordSRV != null && srvRecordResponse.RecordSRV.Length > 0)
{
foreach (RecordSRV srvRecord in srvRecordResponse.RecordSRV)
{
SIPDNSServiceResult sipSRVResult = new SIPDNSServiceResult(reqdNAPTRService, srvRecord.Priority, srvRecord.Weight, srvRecord.RR.TTL, srvRecord.Target, srvRecord.Port, DateTime.Now);
lookupResult.AddSRVResult(sipSRVResult);
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record found for " + srvLookup + ", result " + srvRecord.Target + " " + srvRecord.Port + ".", null));
}
}
else
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS no SRV records found for " + srvLookup + ".", null));
}
}
public static void DNSNAPTRRecordLookup(string host, bool async, ref SIPDNSLookupResult lookupResult)
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS NAPTR record lookup initiated for " + host + ".", null));
// Target is a hostname with no explicit port, DNS lookup for NAPTR records.
DNSResponse naptrRecordResponse = DNSManager.Lookup(host, DNSQType.NAPTR, DNS_LOOKUP_TIMEOUT, null, true, async);
if (naptrRecordResponse == null && async)
{
lookupResult.Pending = true;
}
else if (naptrRecordResponse.Timedout)
{
lookupResult.NAPTRTimedoutAt = DateTime.Now;
}
else if (naptrRecordResponse.Error == null && naptrRecordResponse.RecordNAPTR != null && naptrRecordResponse.RecordNAPTR.Length > 0)
{
foreach (RecordNAPTR naptrRecord in naptrRecordResponse.RecordNAPTR)
{
SIPDNSServiceResult sipNAPTRResult = new SIPDNSServiceResult(SIPServices.GetService(naptrRecord.Service), naptrRecord.Order, 0, naptrRecord.RR.TTL, naptrRecord.Replacement, 0, DateTime.Now);
lookupResult.AddNAPTRResult(sipNAPTRResult);
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS NAPTR record found for " + host + ", result " + naptrRecord.Service + " " + naptrRecord.Replacement + ".", null));
}
}
else
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS no NAPTR records found for " + host + ".", null));
}
}
public void AddSRVResult(SIPServicesEnum service, RecordSRV srvRecord)
{
//logger.Debug("Adding record for " + URI.ToString() + " " + srvRecord.ToString() + ".");
SIPDNSServiceResult sipSRVResult = new SIPDNSServiceResult(service, srvRecord.Priority, srvRecord.RR.TTL, srvRecord.Target, srvRecord.Port, DateTime.Now);
if (SIPSRVResults == null)
{
SIPSRVResults = new List<SIPDNSServiceResult>() { sipSRVResult };
}
else
{
SIPSRVResults.Add(sipSRVResult);
}
}
public static SIPDNSLookupResult DNSARecordLookup(SIPDNSServiceResult nextSRVRecord, string host, int port, bool async, SIPURI lookupURI)
{
if (nextSRVRecord != null && nextSRVRecord.Data != null)
{
return DNSARecordLookup(nextSRVRecord.Data, port, async, lookupURI);
//nextSRVRecord.ResolvedAt = DateTime.Now;
}
else
{
return DNSARecordLookup(host, port, async, lookupURI);
}
}
public void AddNAPTRResult(RecordNAPTR naptrRecord)
{
//logger.Debug("Checking NAPTR record for " + URI.ToString() + " " + naptrRecord.ToString() + ".");
SIPServicesEnum sipServicesEnum = SIPServicesEnum.none;
if (naptrRecord.Service == SIPDNSManager.NAPTR_SIP_UDP_SERVICE)
{
sipServicesEnum = SIPServicesEnum.sipudp;
}
else if (naptrRecord.Service == SIPDNSManager.NAPTR_SIP_TCP_SERVICE)
{
sipServicesEnum = SIPServicesEnum.siptcp;
}
else if (naptrRecord.Service == SIPDNSManager.NAPTR_SIPS_TCP_SERVICE)
{
sipServicesEnum = SIPServicesEnum.sipstcp;
}
if(sipServicesEnum != SIPServicesEnum.none)
{
//logger.Debug(" adding NAPTR lookup result for " + URI.ToString() + " of " + naptrRecord.ToString() + ".");
SIPDNSServiceResult sipNAPTRResult = new SIPDNSServiceResult(sipServicesEnum, naptrRecord.Order, naptrRecord.RR.TTL, naptrRecord.Replacement, 0, DateTime.Now);
if (SIPNAPTRResults == null)
{
SIPNAPTRResults = new Dictionary<SIPServicesEnum, SIPDNSServiceResult>() { { sipServicesEnum, sipNAPTRResult } };
}
else
{
SIPNAPTRResults.Add(sipServicesEnum, sipNAPTRResult);
}
}
}
