FS-3758 --resolve ok so I wrote my own patch but i did borrow the 2 lines of code to create a seq from the original patch! sofia changes probably need to be converted to a tag if they are to go upstream. This completely manages sub/pub from inside mod_sofia inside the db and subs can now persist and/or fail over mid dialog tested on several things like polycom/snom/yealink on SLA and presence

libs/sofia-sip/libsofia-sip-ua/nua/nua_notifier.c

@@ -827,10 +827,10 @@ static int nua_notify_usage_shutdown(nua_handle_t *nh,
 				     nua_dialog_usage_t *du)
 {
   struct notifier_usage *nu = nua_dialog_usage_private(du);
-  nua_client_request_t *cr = du->du_cr;
+  //nua_client_request_t *cr = du->du_cr;
 
   nu->nu_substate = nua_substate_terminated;
-
+#if 0
   if (cr) {
     SU_DEBUG_5(("%s(%p, %p, %p): using existing cr=%p\n",
 		"nua_notify_usage_shutdown",
@@ -852,7 +852,7 @@ static int nua_notify_usage_shutdown(nua_handle_t *nh,
 			   TAG_END()) >= 0)
       return 0;
   }
-
+#endif
   nua_dialog_usage_remove(nh, ds, du, NULL, NULL);
   return 200;
 }

libs/sofia-sip/libsofia-sip-ua/nua/nua_server.c

@@ -158,14 +158,15 @@ int nua_stack_process_request(nua_handle_t *nh,
     /* These must be in-dialog */
     sm = NULL;
   }
-  else if (initial && sip->sip_to->a_tag) {
+  else if (initial && sip->sip_to->a_tag && method != sip_method_subscribe) {
     /* RFC 3261 section 12.2.2:
 
        If the UAS wishes to reject the request because it does not wish to
        recreate the dialog, it MUST respond to the request with a 481
        (Call/Transaction Does Not Exist) status code and pass that to the
        server transaction.
-    */
+    */ /* we allow this on subscribes because we have disabled the built-in notify server and we need those messages in the application layer */
+	  
     if (method == sip_method_info)
       /* accept out-of-dialog info */; else
     if (method != sip_method_message || !NH_PGET(nh, win_messenger_enable))