public SIPEndPoint ToSIPEndPoint()
{
if (IPSocket.TryParseIPEndPoint(Host, out var ipEndPoint))
{
if (ipEndPoint.Port != 0)
{
return(new SIPEndPoint(Protocol, ipEndPoint));
}
else
{
if (Protocol == SIPProtocolsEnum.tls)
{
ipEndPoint.Port = m_defaultSIPTLSPort;
return(new SIPEndPoint(Protocol, ipEndPoint));
}
else
{
ipEndPoint.Port = m_defaultSIPPort;
return(new SIPEndPoint(Protocol, ipEndPoint));
}
}
}
else
{
return(null);
}
}
/// <summary>
/// Reverses ToString().
/// </summary>
/// <param name="serialisedSIPEndPoint">The serialised SIP end point MUST be in the form protocol:socket and protocol must
/// be exactly 3 characters. Valid examples are udp:10.0.0.1:5060, invalid example is 10.0.0.1:5060.</param>
private static SIPEndPoint ParseSerialisedSIPEndPoint(string serialisedSIPEndPoint)
{
if (!IPSocket.TryParseIPEndPoint(serialisedSIPEndPoint.Substring(4), out var endPoint))
{
throw new ApplicationException($"Could not parse SIPURI host {serialisedSIPEndPoint.Substring(4)} as an IP end point.");
}
return(new SIPEndPoint(SIPProtocolsType.GetProtocolType(serialisedSIPEndPoint.Substring(0, 3)), endPoint));
}
public static Task <SIPEndPoint> ResolveSIPUri(SIPURI uri, bool preferIPv6)
{
if (IPSocket.TryParseIPEndPoint(uri.Host, out var ipEndPoint))
{
return(Task.FromResult(new SIPEndPoint(uri.Protocol, ipEndPoint)));
}
else
{
return(Task.FromResult <SIPEndPoint>(null));
}
}
public SIPEndPoint(SIPURI sipURI)
{
Protocol = sipURI.Protocol;
if (!IPSocket.TryParseIPEndPoint(sipURI.Host, out var endPoint))
{
throw new ApplicationException($"Could not parse SIPURI host {sipURI.Host} as an IP end point.");
}
Address = endPoint.Address;
Port = (endPoint.Port == 0) ? (Protocol == SIPProtocolsEnum.tls) ? m_defaultSIPTLSPort : m_defaultSIPPort : endPoint.Port;
}
public SIPEndPoint(SIPURI sipURI)
{
Protocol = sipURI.Protocol;
if (!IPSocket.TryParseIPEndPoint(sipURI.Host, out var endPoint))
{
throw new ApplicationException($"Could not parse SIPURI host {sipURI.Host} as an IP end point.");
}
Address = endPoint.Address;
Port = (endPoint.Port == 0) ? SIPConstants.GetDefaultPort(Protocol) : endPoint.Port;
}
/// <summary>
/// Checks whether the host string corresponds to a socket address that this SIP channel is listening on.
/// </summary>
/// <param name="host">The host string to check.</param>
/// <returns>True if the host is a socket this channel is listening on. False if not.</returns>
internal bool IsChannelSocket(string host)
{
if (IPSocket.TryParseIPEndPoint(host, out var ep))
{
if (ListeningIPAddress != IPAddress.Any)
{
return(ep.Address.Equals(ListeningIPAddress) && ep.Port == ListeningEndPoint.Port);
}
else
{
return(ep.Port == ListeningEndPoint.Port && LocalIPAddresses.Any(x => x.Equals(ep.Address)));
}
}
return(false);
}
public SIPEndPoint ToSIPEndPoint()
{
if (IPSocket.TryParseIPEndPoint(Host, out var ipEndPoint))
{
if (ipEndPoint.Port != 0)
{
return(new SIPEndPoint(Protocol, ipEndPoint));
}
else
{
ipEndPoint.Port = SIPConstants.GetDefaultPort(Protocol);
return(new SIPEndPoint(Protocol, ipEndPoint));
}
}
else
{
return(null);
}
}
public SIPResponse GetOkResponse(SIPRequest sipRequest, SIPEndPoint localSIPEndPoint, string contentType, string messageBody)
{
try
{
SIPResponse okResponse = new SIPResponse(SIPResponseStatusCodesEnum.Ok, null, sipRequest.LocalSIPEndPoint);
SIPHeader requestHeader = sipRequest.Header;
okResponse.Header = new SIPHeader(new SIPContactHeader(null, new SIPURI(sipRequest.URI.Scheme, localSIPEndPoint)), requestHeader.From, requestHeader.To, requestHeader.CSeq, requestHeader.CallId);
if (m_contactIPAddress != null)
{
if (IPSocket.TryParseIPEndPoint(okResponse.Header.Contact.First().ContactURI.Host, out var contactEP))
{
contactEP.Address = m_contactIPAddress;
okResponse.Header.Contact.First().ContactURI.Host = contactEP.ToString();
}
else
{
throw new ApplicationException($"Could not parse IP end point from {okResponse.Header.Contact.First().ContactURI.Host} when parsing OK response.");
}
}
okResponse.Header.To.ToTag = m_localTag;
okResponse.Header.CSeqMethod = requestHeader.CSeqMethod;
okResponse.Header.Vias = requestHeader.Vias;
okResponse.Header.Server = m_sipServerAgent;
okResponse.Header.MaxForwards = Int32.MinValue;
okResponse.Header.RecordRoutes = requestHeader.RecordRoutes;
okResponse.Body = messageBody;
okResponse.Header.ContentType = contentType;
okResponse.Header.ContentLength = (messageBody != null) ? messageBody.Length : 0;
return(okResponse);
}
catch (Exception excp)
{
logger.LogError("Exception GetOkResponse. " + excp.Message);
throw excp;
}
}
/// <summary>
/// Reverses The SIPEndPoint.ToString() method.
/// </summary>
/// <param name="serialisedSIPEndPoint">The serialised SIP end point MUST be in the form protocol:socket[;connid=abcd].
/// Valid examples are udp:10.0.0.1:5060 and ws:10.0.0.1:5060;connid=abcd. An invalid example is 10.0.0.1:5060.</param>
private static SIPEndPoint ParseSerialisedSIPEndPoint(string serialisedSIPEndPoint)
{
string connectionID = null;
string endPointStr = null;
string protcolStr = serialisedSIPEndPoint.Substring(0, serialisedSIPEndPoint.IndexOf(':'));
if (serialisedSIPEndPoint.Contains(";"))
{
endPointStr = serialisedSIPEndPoint.Slice(':', ';');
connectionID = serialisedSIPEndPoint.Substring(serialisedSIPEndPoint.IndexOf(';'));
}
else
{
endPointStr = serialisedSIPEndPoint.Substring(serialisedSIPEndPoint.IndexOf(':') + 1);
}
if (!IPSocket.TryParseIPEndPoint(endPointStr, out var endPoint))
{
throw new ApplicationException($"Could not parse SIPEndPoint host {endPointStr} as an IP end point.");
}
return(new SIPEndPoint(SIPProtocolsType.GetProtocolType(protcolStr), endPoint, connectionID));
}
/// <summary>
/// Reverses The SIPEndPoint.ToString() method.
/// </summary>
/// <param name="serialisedSIPEndPoint">The serialised SIP end point MUST be in the form protocol:socket[;connid=abcd].
/// Valid examples are udp:10.0.0.1:5060 and ws:10.0.0.1:5060;connid=abcd. An invalid example is 10.0.0.1:5060.</param>
private static SIPEndPoint ParseSerialisedSIPEndPoint(string serialisedSIPEndPoint)
{
string channelID = null;
string connectionID = null;
string endPointStr = null;
string protcolStr = serialisedSIPEndPoint.Substring(0, serialisedSIPEndPoint.IndexOf(':'));
if (serialisedSIPEndPoint.Contains(";"))
{
endPointStr = serialisedSIPEndPoint.Slice(':', ';');
var paramsStr = serialisedSIPEndPoint.Substring(serialisedSIPEndPoint.IndexOf(';') + 1)?.Trim();
var endPointParams = new SIPParameters(paramsStr, ';');
if (endPointParams.Has(CHANNELID_ATTRIBUTE_NAME))
{
channelID = endPointParams.Get(CHANNELID_ATTRIBUTE_NAME);
}
if (endPointParams.Has(CONNECTIONID_ATTRIBUTE_NAME))
{
connectionID = endPointParams.Get(CONNECTIONID_ATTRIBUTE_NAME);
}
}
else
{
endPointStr = serialisedSIPEndPoint.Substring(serialisedSIPEndPoint.IndexOf(':') + 1);
}
if (!IPSocket.TryParseIPEndPoint(endPointStr, out var endPoint))
{
throw new ApplicationException($"Could not parse SIPEndPoint host {endPointStr} as an IP end point.");
}
return(new SIPEndPoint(SIPProtocolsType.GetProtocolType(protcolStr), endPoint, channelID, connectionID));
}
public static SIPDNSLookupResult Resolve(SIPURI sipURI, bool async, bool?preferIPv6)
{
// This assumes the input SIP URI has an IP address as the host!
IPSocket.TryParseIPEndPoint(sipURI.Host, out var ipEndPoint);
return(new SIPDNSLookupResult(sipURI, new SIPEndPoint(ipEndPoint)));
}
public static STUNUri ParseSTUNUri(string uri)
{
STUNUri stunUri = new STUNUri();
if (String.IsNullOrEmpty(uri))
{
throw new ApplicationException("A STUN URI cannot be parsed from an empty string.");
}
else
{
uri = uri.Trim();
// If the scheme is included it needs to be within the first 5 characters.
if (uri.Length > SCHEME_MAX_LENGTH + 2)
{
string schemeStr = uri.Substring(0, SCHEME_MAX_LENGTH + 1);
int colonPosn = schemeStr.IndexOf(SCHEME_ADDR_SEPARATOR);
if (colonPosn == -1)
{
// No scheme has been specified, use default.
stunUri.Scheme = DefaultSTUNScheme;
}
else
{
if (!Enum.TryParse <STUNSchemesEnum>(schemeStr.Substring(0, colonPosn), true,
out stunUri.Scheme))
{
stunUri.Scheme = DefaultSTUNScheme;
}
uri = uri.Substring(colonPosn + 1);
}
}
if (uri.IndexOf(':') != -1)
{
stunUri.ExplicitPort = true;
if (IPSocket.TryParseIPEndPoint(uri, out var ipEndPoint))
{
if (ipEndPoint.AddressFamily == AddressFamily.InterNetworkV6)
{
stunUri.Host = $"[{ipEndPoint.Address}]";
}
else
{
stunUri.Host = ipEndPoint.Address.ToString();
}
stunUri.Port = ipEndPoint.Port;
}
else
{
stunUri.Host = uri.Substring(0, uri.LastIndexOf(':'));
if (!Int32.TryParse(uri.Substring(uri.LastIndexOf(':') + 1), out stunUri.Port))
{
stunUri.Port = STUNConstants.GetPortForScheme(stunUri.Scheme);
}
}
}
else
{
stunUri.Host = uri?.Trim();
stunUri.Port = STUNConstants.GetPortForScheme(stunUri.Scheme);
}
}
return(stunUri);
}
// TODO: Remove this nasty code duplication with ResolveSIPService!
public static async Task <SIPDNSLookupResult> ResolveAsync(SIPURI sipURI, bool?preferIPv6 = null)
{
try
{
if (sipURI == null)
{
throw new ArgumentNullException("sipURI", "Cannot resolve SIP service on a null URI.");
}
if (IPSocket.TryParseIPEndPoint(sipURI.MAddrOrHost, out var ipEndPoint))
{
// Target is an IP address, no DNS lookup required.
SIPDNSLookupEndPoint sipLookupEndPoint = new SIPDNSLookupEndPoint(new SIPEndPoint(sipURI.Protocol, ipEndPoint), 0);
SIPDNSLookupResult result = new SIPDNSLookupResult(sipURI);
result.AddLookupResult(sipLookupEndPoint);
return(result);
}
else
{
string host = sipURI.MAddrOrHostAddress;
//int port = IPSocket.ParsePortFromSocket(host);
int port = sipURI.Protocol != SIPProtocolsEnum.tls ? m_defaultSIPPort : m_defaultSIPSPort;
if (preferIPv6 == null)
{
preferIPv6 = SIPDNSManager.PreferIPv6NameResolution;
}
bool explicitPort = false;
try
{
//Parse returns true if sipURI.Host can be parsed as an ipaddress
bool parseresult = SIPSorcery.Sys.IPSocket.Parse(sipURI.MAddrOrHost, out host, out port);
explicitPort = port >= 0;
if (!explicitPort)
{
//port = (sipURI.Scheme == SIPSchemesEnum.sip) ? m_defaultSIPPort : m_defaultSIPSPort;
port = sipURI.Protocol != SIPProtocolsEnum.tls ? m_defaultSIPPort : m_defaultSIPSPort;
}
if (parseresult == true)
{
IPAddress hostIP = IPAddress.Parse(host);
SIPDNSLookupEndPoint sipLookupEndPoint = new SIPDNSLookupEndPoint(new SIPEndPoint(sipURI.Protocol, new IPEndPoint(hostIP, port)), 0);
SIPDNSLookupResult result = new SIPDNSLookupResult(sipURI);
result.AddLookupResult(sipLookupEndPoint);
return(result);
}
}
catch (Exception ex)
{
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "Exception SIPDNSManager ResolveSIPService (" + sipURI.ToString() + "). " + ex, null));
//rj2: if there is a parsing exception, then fallback to original sipsorcery parsing mechanism
port = IPSocket.ParsePortFromSocket(sipURI.Host);
explicitPort = port > 0;
//if(Regex.Match(host, @"^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$").Success)
if (SIPSorcery.Sys.IPSocket.IsIPAddress(host))
{
// Target is an IP address, no DNS lookup required.
IPAddress hostIP = IPAddress.Parse(host);
SIPDNSLookupEndPoint sipLookupEndPoint = new SIPDNSLookupEndPoint(new SIPEndPoint(sipURI.Protocol, new IPEndPoint(hostIP, port)), 0);
SIPDNSLookupResult result = new SIPDNSLookupResult(sipURI);
result.AddLookupResult(sipLookupEndPoint);
return(result);
}
}
if (!explicitPort)
{
//port = (sipURI.Scheme == SIPSchemesEnum.sip) ? m_defaultSIPPort : m_defaultSIPSPort;
port = sipURI.Protocol != SIPProtocolsEnum.tls ? m_defaultSIPPort : m_defaultSIPSPort;
}
if (host.Contains(".") == false || IPSocket.ParseHostFromSocket(host).EndsWith(MDNS_TLD))
{
string hostOnly = IPSocket.ParseHostFromSocket(host);
// If host is not fully qualified then assume there's no point using NAPTR or SRV record look ups and go straight to A's.
if (hostOnly.ToLower() == System.Net.Dns.GetHostName()?.ToLower())
{
// The lookup is for the current machine.
var addressList = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList;
if (addressList?.Length == 0)
{
return(new SIPDNSLookupResult(sipURI, $"Failed to resolve local machine hostname."));
}
else
{
// Preference for IPv4 IP address for local host name lookup.
IPAddress firstAddress = addressList.Where(x => x.AddressFamily == (preferIPv6 == true ? AddressFamily.InterNetworkV6 : AddressFamily.InterNetwork)).FirstOrDefault() ?? addressList.FirstOrDefault();
SIPEndPoint resultEp = new SIPEndPoint(sipURI.Protocol, new IPEndPoint(firstAddress, port));
return(new SIPDNSLookupResult(sipURI, resultEp));
}
}
else
{
return(await Task.Run(() => DNSNameRecordLookup(hostOnly, port, false, sipURI, null, preferIPv6)).ConfigureAwait(false));
}
}
else if (explicitPort)
{
// If target is a hostname with an explicit port then SIP lookup rules state to use DNS lookup for A or AAAA record.
host = host.Substring(0, host.LastIndexOf(':'));
return(await Task.Run(() => DNSNameRecordLookup(host, port, false, sipURI, null, preferIPv6)).ConfigureAwait(false));
}
else
{
// Target is a hostname with no explicit port, use the whole NAPTR->SRV->A lookup procedure.
SIPDNSLookupResult sipLookupResult = new SIPDNSLookupResult(sipURI);
// Do without the NAPTR lookup for the time being. Very few organisations appear to use them and it can cost up to 2.5s to get a failed resolution.
//rj2: uncomment this section for telekom 1TR118 lookup
SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS full lookup requested for " + sipURI.ToString() + ".", null));
DNSNAPTRRecordLookup(host, false, ref sipLookupResult);
if (sipLookupResult.Pending)
{
if (!m_inProgressSIPServiceLookups.Contains(sipURI.ToString()))
{
m_inProgressSIPServiceLookups.Add(sipURI.ToString());
//ThreadPool.QueueUserWorkItem(delegate { ResolveSIPService(sipURI, false); });
System.Threading.ThreadPool.QueueUserWorkItem((obj) => ResolveSIPService(sipURI, false, preferIPv6));
}
return(sipLookupResult);
}
return(await Task.Run(() =>
{
DNSSRVRecordLookup(sipURI.Scheme, sipURI.Protocol, host, false, ref sipLookupResult);
if (sipLookupResult.Pending)
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is pending.");
return sipLookupResult;
}
else
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is final.");
// Add some custom logic to cope with sips SRV records using _sips._tcp (e.g. free.call.ciscospark.com).
// By default only _sips._tls SRV records are checked for. THis block adds an additional check for _sips._tcp SRV records.
//if ((sipLookupResult.SIPSRVResults == null || sipLookupResult.SIPSRVResults.Count == 0) && sipURI.Scheme == SIPSchemesEnum.sips)
//{
// DNSSRVRecordLookup(sipURI.Scheme, SIPProtocolsEnum.tcp, host, async, ref sipLookupResult);
// SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
// int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
// return DNSARecordLookup(nextSRVRecord, host, lookupPort, async, sipLookupResult.URI);
//}
//else
//{
// SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
// int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
// return DNSARecordLookup(nextSRVRecord, host, lookupPort, false, sipLookupResult.URI);
//}
// The SRV record can indicate the SIP server is using a non-standard port.
SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
return DNSNameRecordLookup(host, lookupPort, false, sipLookupResult.URI, ref sipLookupResult, preferIPv6);
}
}).ConfigureAwait(false));
}
}
}
catch (Exception excp)
{
logger.LogError("Exception SIPDNSManager ResolveSIPService (" + sipURI.ToString() + "). " + excp.Message);
m_inProgressSIPServiceLookups.Remove(sipURI.ToString());
return(new SIPDNSLookupResult(sipURI, excp.Message));
}
}
public static SIPDNSLookupResult ResolveSIPService(SIPURI sipURI, bool async)
{
try
{
if (sipURI == null)
{
throw new ArgumentNullException("sipURI", "Cannot resolve SIP service on a null URI.");
}
if (IPSocket.TryParseIPEndPoint(sipURI.Host, out var ipEndPoint))
{
// Target is an IP address, no DNS lookup required.
SIPDNSLookupEndPoint sipLookupEndPoint = new SIPDNSLookupEndPoint(new SIPEndPoint(sipURI.Protocol, ipEndPoint), 0);
SIPDNSLookupResult result = new SIPDNSLookupResult(sipURI);
result.AddLookupResult(sipLookupEndPoint);
return(result);
}
else
{
string host = sipURI.Host;
int port = IPSocket.ParsePortFromSocket(sipURI.Host);
bool explicitPort = (port != 0);
if (!explicitPort)
{
port = (sipURI.Scheme == SIPSchemesEnum.sip) ? m_defaultSIPPort : m_defaultSIPSPort;
}
if (host.Contains(".") == false)
{
string hostOnly = IPSocket.ParseHostFromSocket(host);
// If host is not fully qualified then assume there's no point using NAPTR or SRV record look ups and go straight to A's.
if (hostOnly.ToLower() == System.Net.Dns.GetHostName()?.ToLower())
{
// The lookup is for the current machine.
var addressList = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList;
if (addressList?.Length == 0)
{
return(new SIPDNSLookupResult(sipURI, $"Failed to resolve local machine hostname."));
}
else
{
// Preference for IPv4 IP address for local host anem lookup.
IPAddress firstAddress = addressList.Where(x => x.AddressFamily == AddressFamily.InterNetwork).FirstOrDefault() ?? addressList.FirstOrDefault();
SIPEndPoint resultEp = new SIPEndPoint(sipURI.Protocol, new IPEndPoint(firstAddress, port));
return(new SIPDNSLookupResult(sipURI, resultEp));
}
}
else
{
return(DNSARecordLookup(hostOnly, port, async, sipURI));
}
}
else if (explicitPort)
{
// If target is a hostname with an explicit port then SIP lookup rules state to use DNS lookup for A or AAAA record.
host = host.Substring(0, host.LastIndexOf(':'));
return(DNSARecordLookup(host, port, async, sipURI));
}
else
{
// Target is a hostname with no explicit port, use the whole NAPTR->SRV->A lookup procedure.
SIPDNSLookupResult sipLookupResult = new SIPDNSLookupResult(sipURI);
// Do without the NAPTR lookup for the time being. Very few organisations appear to use them and it can cost up to 2.5s to get a failed resolution.
/*SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS full lookup requested for " + sipURI.ToString() + ".", null));
* DNSNAPTRRecordLookup(host, async, ref sipLookupResult);
* if (sipLookupResult.Pending)
* {
* if (!m_inProgressSIPServiceLookups.Contains(sipURI.ToString()))
* {
* m_inProgressSIPServiceLookups.Add(sipURI.ToString());
* ThreadPool.QueueUserWorkItem(delegate { ResolveSIPService(sipURI, false); });
* }
* return sipLookupResult;
* }*/
DNSSRVRecordLookup(sipURI.Scheme, sipURI.Protocol, host, async, ref sipLookupResult);
if (sipLookupResult.Pending)
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is pending.");
return(sipLookupResult);
}
else
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is final.");
// Add some custom logic to cope with sips SRV records using _sips._tcp (e.g. free.call.ciscospark.com).
// By default only _sips._tls SRV records are checked for. THis block adds an additional check for _sips._tcp SRV records.
//if ((sipLookupResult.SIPSRVResults == null || sipLookupResult.SIPSRVResults.Count == 0) && sipURI.Scheme == SIPSchemesEnum.sips)
//{
// DNSSRVRecordLookup(sipURI.Scheme, SIPProtocolsEnum.tcp, host, async, ref sipLookupResult);
// SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
// int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
// return DNSARecordLookup(nextSRVRecord, host, lookupPort, async, sipLookupResult.URI);
//}
//else
//{
SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
return(DNSARecordLookup(nextSRVRecord, host, lookupPort, async, sipLookupResult.URI));
//}
}
}
}
}
catch (Exception excp)
{
logger.LogError("Exception SIPDNSManager ResolveSIPService (" + sipURI.ToString() + "). " + excp.Message);
m_inProgressSIPServiceLookups.Remove(sipURI.ToString());
return(new SIPDNSLookupResult(sipURI, excp.Message));
}
}
public static SIPDNSLookupResult ResolveSIPService(SIPURI sipURI, bool async)
{
try
{
if (sipURI == null)
{
throw new ArgumentNullException("sipURI", "Cannot resolve SIP service on a null URI.");
}
if (IPSocket.TryParseIPEndPoint(sipURI.Host, out var ipEndPoint))
{
// Target is an IP address, no DNS lookup required.
//IPAddress hostIP = IPAddress.Parse(host);
SIPDNSLookupEndPoint sipLookupEndPoint = new SIPDNSLookupEndPoint(new SIPEndPoint(sipURI.Protocol, ipEndPoint), 0);
SIPDNSLookupResult result = new SIPDNSLookupResult(sipURI);
result.AddLookupResult(sipLookupEndPoint);
return(result);
}
else
{
string host = sipURI.Host;
int port = IPSocket.ParsePortFromSocket(sipURI.Host);
bool explicitPort = (port != 0);
if (!explicitPort)
{
port = (sipURI.Scheme == SIPSchemesEnum.sip) ? m_defaultSIPPort : m_defaultSIPSPort;
}
if (explicitPort)
{
host = host.Substring(0, host.LastIndexOf(':'));
// Target is a hostname with an explicit port, DNS lookup for A or AAAA record.
return(DNSARecordLookup(host, port, async, sipURI));
}
else
{
// Target is a hostname with no explicit port, use the whole NAPTR->SRV->A lookup procedure.
SIPDNSLookupResult sipLookupResult = new SIPDNSLookupResult(sipURI);
// Do without the NAPTR lookup for the time being. Very few organisations appear to use them and it can cost up to 2.5s to get a failed resolution.
/*SIPMonitorLogEvent(new SIPMonitorConsoleEvent(SIPMonitorServerTypesEnum.Unknown, SIPMonitorEventTypesEnum.DNS, "SIP DNS full lookup requested for " + sipURI.ToString() + ".", null));
* DNSNAPTRRecordLookup(host, async, ref sipLookupResult);
* if (sipLookupResult.Pending)
* {
* if (!m_inProgressSIPServiceLookups.Contains(sipURI.ToString()))
* {
* m_inProgressSIPServiceLookups.Add(sipURI.ToString());
* ThreadPool.QueueUserWorkItem(delegate { ResolveSIPService(sipURI, false); });
* }
* return sipLookupResult;
* }*/
DNSSRVRecordLookup(sipURI.Scheme, sipURI.Protocol, host, async, ref sipLookupResult);
if (sipLookupResult.Pending)
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is pending.");
return(sipLookupResult);
}
else
{
//logger.LogDebug("SIPDNSManager SRV lookup for " + host + " is final.");
// Add some custom logic to cope with sips SRV records using _sips._tcp (e.g. free.call.ciscospark.com).
// By default only _sips._tls SRV records are checked for. THis block adds an additional check for _sips._tcp SRV records.
//if ((sipLookupResult.SIPSRVResults == null || sipLookupResult.SIPSRVResults.Count == 0) && sipURI.Scheme == SIPSchemesEnum.sips)
//{
// DNSSRVRecordLookup(sipURI.Scheme, SIPProtocolsEnum.tcp, host, async, ref sipLookupResult);
// SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
// int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
// return DNSARecordLookup(nextSRVRecord, host, lookupPort, async, sipLookupResult.URI);
//}
//else
//{
SIPDNSServiceResult nextSRVRecord = sipLookupResult.GetNextUnusedSRV();
int lookupPort = (nextSRVRecord != null) ? nextSRVRecord.Port : port;
return(DNSARecordLookup(nextSRVRecord, host, lookupPort, async, sipLookupResult.URI));
//}
}
}
}
}
catch (Exception excp)
{
logger.LogError("Exception SIPDNSManager ResolveSIPService (" + sipURI.ToString() + "). " + excp.Message);
m_inProgressSIPServiceLookups.Remove(sipURI.ToString());
return(new SIPDNSLookupResult(sipURI, excp.Message));
}
}