private void Initialise(List<SIPContactHeader> contact, SIPFromHeader from, SIPToHeader to, int cseq, string callId)
{
if (from == null)
{
throw new ApplicationException("The From header cannot be empty when creating a new SIP header.");
}
if (to == null)
{
throw new ApplicationException("The To header cannot be empty when creating a new SIP header.");
}
if (callId == null || callId.Trim().Length == 0)
{
throw new ApplicationException("The CallId header cannot be empty when creating a new SIP header.");
}
From = from;
To = to;
Contact = contact;
CallId = callId;
if (cseq > 0 && cseq < Int32.MaxValue)
{
CSeq = cseq;
}
else
{
CSeq = DEFAULT_CSEQ;
}
}
public static SIPToHeader ParseToHeader(string toHeaderStr)
{
try
{
SIPToHeader toHeader = new SIPToHeader();
toHeader.m_userField = SIPUserField.ParseSIPUserField(toHeaderStr);
return toHeader;
}
catch (ArgumentException argExcp)
{
throw new SIPValidationException(SIPValidationFieldsEnum.ToHeader, argExcp.Message);
}
catch
{
throw new SIPValidationException(SIPValidationFieldsEnum.ToHeader, "The SIP To header was invalid.");
}
}
public SIPHeader(SIPContactHeader contact, SIPFromHeader from, SIPToHeader to, int cseq, string callId)
{
List<SIPContactHeader> contactList = new List<SIPContactHeader>();
if (contact != null)
{
contactList.Add(contact);
}
Initialise(contactList, from, to, cseq, callId);
}
public SIPHeader(List<SIPContactHeader> contactList, SIPFromHeader from, SIPToHeader to, int cseq, string callId)
{
Initialise(contactList, from, to, cseq, callId);
}
/// <summary>
/// Used to create a SIP response when it was not possible to parse the incoming SIP request.
/// </summary>
public SIPResponse GetResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponseStatusCodesEnum responseCode, string reasonPhrase)
{
try
{
if (localSIPEndPoint == null)
{
localSIPEndPoint = GetDefaultSIPEndPoint();
}
SIPResponse response = new SIPResponse(responseCode, reasonPhrase, localSIPEndPoint);
SIPSchemesEnum sipScheme = (localSIPEndPoint.Protocol == SIPProtocolsEnum.tls) ? SIPSchemesEnum.sips : SIPSchemesEnum.sip;
SIPFromHeader from = new SIPFromHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null);
SIPToHeader to = new SIPToHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null);
int cSeq = 1;
string callId = CallProperties.CreateNewCallId();
response.Header = new SIPHeader(from, to, cSeq, callId);
response.Header.CSeqMethod = SIPMethodsEnum.NONE;
response.Header.Vias.PushViaHeader(new SIPViaHeader(new SIPEndPoint(localSIPEndPoint.Protocol, remoteEndPoint.GetIPEndPoint()), CallProperties.CreateBranchId()));
response.Header.MaxForwards = Int32.MinValue;
response.Header.Allow = ALLOWED_SIP_METHODS;
return response;
}
catch (Exception excp)
{
logger.Error("Exception SIPTransport GetResponse. " + excp.Message);
throw;
}
}
public SIPHeader(SIPFromHeader from, SIPToHeader to, int cseq, string callId)
{
Initialise(null, from, to, cseq, callId);
}
public SIPRequest GetRequest(SIPMethodsEnum method, SIPURI uri, SIPToHeader to, SIPEndPoint localSIPEndPoint)
{
if (localSIPEndPoint == null)
{
localSIPEndPoint = GetDefaultSIPEndPoint();
}
SIPRequest request = new SIPRequest(method, uri);
request.LocalSIPEndPoint = localSIPEndPoint;
SIPContactHeader contactHeader = new SIPContactHeader(null, new SIPURI(SIPSchemesEnum.sip, localSIPEndPoint));
SIPFromHeader fromHeader = new SIPFromHeader(null, contactHeader.ContactURI, CallProperties.CreateNewTag());
SIPHeader header = new SIPHeader(contactHeader, fromHeader, to, 1, CallProperties.CreateNewCallId());
request.Header = header;
header.CSeqMethod = method;
header.Allow = ALLOWED_SIP_METHODS;
SIPViaHeader viaHeader = new SIPViaHeader(localSIPEndPoint, CallProperties.CreateBranchId());
header.Vias.PushViaHeader(viaHeader);
return request;
}
private SIPRequest GetRequest(SIPMethodsEnum method)
{
try
{
SIPURI uri = SIPURI.ParseSIPURIRelaxed(m_callDescriptor.Uri);
SIPRequest request = new SIPRequest(method, uri);
SIPFromHeader fromHeader = m_callDescriptor.GetFromHeader();
fromHeader.FromTag = CallProperties.CreateNewTag();
SIPToHeader toHeader = new SIPToHeader(null, uri, null);
int cseq = Crypto.GetRandomInt(10000, 20000);
SIPHeader header = new SIPHeader(fromHeader, toHeader, cseq, CallProperties.CreateNewCallId());
header.CSeqMethod = method;
header.UserAgent = m_userAgent;
request.Header = header;
SIPViaHeader viaHeader = new SIPViaHeader(m_sipTransport.GetDefaultSIPEndPoint(), CallProperties.CreateBranchId());
request.Header.Vias.PushViaHeader(viaHeader);
try
{
if (m_callDescriptor.CustomHeaders != null && m_callDescriptor.CustomHeaders.Count > 0)
{
foreach (string customHeader in m_callDescriptor.CustomHeaders)
{
if (customHeader.IsNullOrBlank())
{
continue;
}
else if (customHeader.Trim().StartsWith(SIPHeaders.SIP_HEADER_USERAGENT))
{
request.Header.UserAgent = customHeader.Substring(customHeader.IndexOf(":") + 1).Trim();
}
else
{
request.Header.UnknownHeaders.Add(customHeader);
}
}
}
}
catch (Exception excp)
{
logger.Error("Exception Parsing CustomHeader for SIPNonInviteClientUserAgent GetRequest. " + excp.Message + m_callDescriptor.CustomHeaders);
}
if (!m_callDescriptor.Content.IsNullOrBlank())
{
request.Body = m_callDescriptor.Content;
request.Header.ContentType = m_callDescriptor.ContentType;
request.Header.ContentLength = request.Body.Length;
}
return request;
}
catch (Exception excp)
{
logger.Error("Exception SIPNonInviteClientUserAgent GetRequest. " + excp.Message);
throw excp;
}
}
private SIPRequest GetOptionsRequest(SIPURI serverURI, int cseq, IPEndPoint contact)
{
SIPRequest optionsRequest = new SIPRequest(SIPMethodsEnum.OPTIONS, serverURI);
SIPFromHeader fromHeader = new SIPFromHeader(null, SIPURI.ParseSIPURI("sip:" + contact.ToString()), null);
SIPToHeader toHeader = new SIPToHeader(null, serverURI, null);
string callId = CallProperties.CreateNewCallId();
string branchId = CallProperties.CreateBranchId();
SIPHeader header = new SIPHeader(fromHeader, toHeader, cseq, callId);
header.CSeqMethod = SIPMethodsEnum.OPTIONS;
header.MaxForwards = 0;
SIPViaHeader viaHeader = new SIPViaHeader(contact.Address.ToString(), contact.Port, branchId);
header.Vias.PushViaHeader(viaHeader);
optionsRequest.Header = header;
return optionsRequest;
}
private SIPRequest GetRegistrationRequest(SIPProvider sipProvider, SIPProviderBinding binding, SIPEndPoint localSIPEndPoint, int expiry, SIPEndPoint registrarEndPoint)
{
try
{
if (!binding.BindingSIPURI.Parameters.Has(m_regAgentContactId))
{
binding.BindingSIPURI.Parameters.Set(m_regAgentContactId, Crypto.GetRandomString(6));
}
string realm = binding.RegistrarRealm;
SIPURI registerURI = SIPURI.ParseSIPURIRelaxed(realm);
SIPURI regUserURI = SIPURI.ParseSIPURIRelaxed(sipProvider.ProviderUsername + "@" + realm);
SIPFromHeader fromHeader = new SIPFromHeader(null, regUserURI, CallProperties.CreateNewTag());
SIPToHeader toHeader = new SIPToHeader(null, regUserURI, null);
SIPContactHeader contactHeader = new SIPContactHeader(null, binding.BindingSIPURI);
//contactHeader.Expires = binding.BindingExpiry;
string callId = binding.Id.ToString();
int cseq = ++binding.CSeq;
SIPRequest registerRequest = new SIPRequest(SIPMethodsEnum.REGISTER, registerURI);
registerRequest.LocalSIPEndPoint = localSIPEndPoint;
SIPHeader header = new SIPHeader(contactHeader, fromHeader, toHeader, cseq, callId);
header.CSeqMethod = SIPMethodsEnum.REGISTER;
header.UserAgent = m_userAgentString;
header.Expires = binding.BindingExpiry;
SIPViaHeader viaHeader = new SIPViaHeader(localSIPEndPoint, CallProperties.CreateBranchId());
header.Vias.PushViaHeader(viaHeader);
SIPRoute registrarRoute = new SIPRoute(new SIPURI(binding.RegistrarServer.Scheme, registrarEndPoint), true);
header.Routes.PushRoute(registrarRoute);
if (sipProvider != null && !sipProvider.CustomHeaders.IsNullOrBlank())
{
string[] customerHeadersList = sipProvider.CustomHeaders.Split(SIPProvider.CUSTOM_HEADERS_SEPARATOR);
if (customerHeadersList != null && customerHeadersList.Length > 0)
{
foreach (string customHeader in customerHeadersList)
{
if (customHeader.IndexOf(':') == -1)
{
logger.Debug("Skipping custom header due to missing colon, " + customHeader + ".");
continue;
}
else
{
string headerName = customHeader.Substring(0, customHeader.IndexOf(':'));
if (headerName != null && Regex.Match(headerName.Trim(), "(Via|From|To|Contact|CSeq|Call-ID|Max-Forwards|Content)", RegexOptions.IgnoreCase).Success)
{
logger.Debug("Skipping custom header due to an non-permitted string in header name, " + customHeader + ".");
continue;
}
else
{
if (headerName == SIPConstants.SIP_USERAGENT_STRING)
{
header.UserAgent = customHeader.Substring(customHeader.IndexOf(':') + 1);
}
else
{
header.UnknownHeaders.Add(customHeader.Trim());
}
}
}
}
}
}
registerRequest.Header = header;
return registerRequest;
}
catch (Exception excp)
{
logger.Error("Exception GetRegistrationRequest. " + excp.Message);
throw excp;
}
}
public SIPRequest GetRequest(SIPMethodsEnum method, SIPURI uri, SIPToHeader to, SIPEndPoint localSIPEndPoint)
{
if (localSIPEndPoint == null)
{
localSIPEndPoint = GetDefaultSIPEndPoint();
}
SIPRequest request = new SIPRequest(method, uri);
request.LocalSIPEndPoint = localSIPEndPoint;
SIPContactHeader contactHeader = new SIPContactHeader(null, new SIPURI(SIPSchemesEnum.sip, localSIPEndPoint));
if (!String.IsNullOrWhiteSpace(m_contactGruu))
{
contactHeader.ContactURI.Parameters.Set("gr", m_contactGruu);
}
SIPFromHeader fromHeader = new SIPFromHeader(null, contactHeader.ContactURI, CallProperties.CreateNewTag());
SIPHeader header = new SIPHeader(contactHeader, fromHeader, to, 1, CallProperties.CreateNewCallId());
request.Header = header;
header.CSeqMethod = method;
header.Allow = ALLOWED_SIP_METHODS;
if (m_serviceRoute != null)
header.Routes.AddBottomRoute(m_serviceRoute);
SIPViaHeader viaHeader = new SIPViaHeader(localSIPEndPoint, CallProperties.CreateBranchId());
header.Vias.PushViaHeader(viaHeader);
return request;
}