protected override void ProcessPacket(NewPacketEventArgs packetInfo)
{
DirectoryAgentAdvertPacket advert = packetInfo.Packet as DirectoryAgentAdvertPacket;
if (advert != null)
{
ProcessDAAdvert(advert, packetInfo.SourceEndPoint);
}
ServiceRequestPacket request = packetInfo.Packet as ServiceRequestPacket;
if (IsReplyRequired(request))
{
SendServiceReply(packetInfo.SourceEndPoint, packetInfo.Packet.Header.XId);
}
ServiceAcknowledgePacket acknowledge = packetInfo.Packet as ServiceAcknowledgePacket;
if (acknowledge != null)
{
RaiseServiceRegistered();
}
AttributeRequestPacket attributeRequest = packetInfo.Packet as AttributeRequestPacket;
if (IsReplyRequired(attributeRequest))
{
SendAttributeReply(packetInfo.SourceEndPoint, packetInfo.Packet.Header.XId);
}
}
/// <summary>
/// Sends an attribute request.
/// This can either be to a specific URL or a general service URL.
/// Results will be returned via the AttributeReply event
/// </summary>
/// <param name="scope">The scope.</param>
/// <param name="url">The URL.</param>
/// <returns>
/// An id for this request which can be used to mtch it to the reply
/// </returns>
private int SendAttributeRequest(string scope, string url)
{
AttributeRequestPacket request = PrepareAttributeRequest(scope, url);
socket.Send(request);
return(request.Header.XId);
}
/// <summary>
/// Prepares the attribute request object.
/// </summary>
/// <param name="scope">The scope.</param>
/// <param name="url">The URL.</param>
/// <returns></returns>
private AttributeRequestPacket PrepareAttributeRequest(string scope, string url)
{
AttributeRequestPacket request = new AttributeRequestPacket();
FillHeader(request.Header, NewTransactionId());
request.ScopeList = scope;
request.Url = url;
return(request);
}
/// <summary>
/// Determines whether a reply is required for the specified request.
/// We should only respond to requests within the scope of the
/// service
/// </summary>
/// <param name="request">The request.</param>
/// <returns>
/// <c>true</c> if reply is required; otherwise, <c>false</c>.
/// </returns>
private bool IsReplyRequired(AttributeRequestPacket request)
{
if (!IsReplyRequired((SlpRequestPacket)request))
{
return(false);
}
//Does the requested url match this service?
// The URL field can take two forms.
// It can simply be a Service Type such as "http" or "service:tftp".
// In this case, all attributes are returned if the type matches
// Or it can be a full URl in which case we only reply if the full URL matches
return(CheckUrlMatch(request.Url, ServiceAbstractType, ServiceConcreteType, ServiceAddress));
}
