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
{
if (scheme == SIPSchemesEnum.sips)
{
srvLookup = SIPDNSConstants.SRV_SIPS_TCP_QUERY_PREFIX + host;
}
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 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 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;
}
//rj2 2018-10-17: this looks wrong, but the www says: if sips then protocol is _tcp not _tls
else if (scheme == SIPSchemesEnum.sips && protocol == SIPProtocolsEnum.tls)
{
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.
// this works best (only works) if protocol in sip-uri matches sip-service of NAPTRRecord
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
{
if (scheme == SIPSchemesEnum.sips)
{
srvLookup = SIPDNSConstants.SRV_SIPS_TCP_QUERY_PREFIX + host;
}
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, QType.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 (!string.IsNullOrWhiteSpace(srvRecordResponse.Error))
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS SRV record lookup for " + srvLookup + " returned error of " + lookupResult.LookupError + ".", null));
}
else if (string.IsNullOrWhiteSpace(srvRecordResponse.Error) && 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));
}
}