private void SendNotify(Dialog dialog, int expires, PresenceDocument document)
{
int transactionId = GetTransactionId(Methods.Notifym);
var writer = new SipMessageWriter();
writer.WriteRequestLine(Methods.Notifym, dialog.RemoteUri);
writer.WriteVia(dialog.Transport, dialog.LocalEndPoint, transactionId);
writer.WriteFrom(dialog.LocalUri, dialog.LocalTag);
writer.WriteTo(dialog.RemoteUri, dialog.RemoteTag);
writer.WriteCallId(dialog.CallId);
writer.WriteEventPresence();
writer.WriteSubscriptionState(expires);
writer.WriteMaxForwards(70);
writer.WriteCseq(dialog.GetNextLocalCseq(), Methods.Notifym);
writer.WriteContact(dialog.LocalEndPoint, dialog.Transport);
if (document != null)
{
writer.WriteContentType(application, pidfXml);
//writer.WriteContentLength();
//writer.WriteCRLF();
//writer.RewriteContentLength(
// document.CopyTo((length) => writer.GetBytesForCustomWrite(length)));
document.WriteLenghtAndContent(writer);
}
else
{
writer.WriteContentLength(0);
writer.WriteCRLF();
}
notifyProducer.SendRequest(dialog.Transport, dialog.LocalEndPoint,
dialog.RemoteEndPoint, ServerAsyncEventArgs.AnyConnectionId, writer, transactionId);
}