Link style support. Fixes https://github.com/GNS3/gns3-gui/issues/2461

gns3server/controller/link.py

@@ -124,6 +124,7 @@ class Link:
         self._link_type = "ethernet"
         self._suspended = False
         self._filters = {}
+        self._link_style = {}
 
     @property
     def filters(self):
@@ -209,6 +210,13 @@ class Link:
             self._project.emit_notification("link.updated", self.__json__())
             self._project.dump()
 
+    async def update_link_style(self, link_style):
+        if link_style != self._link_style:
+            self._link_style = link_style
+            await self.update()
+            self._project.emit_notification("link.updated", self.__json__())
+            self._project.dump()
+
     @property
     def created(self):
         """
@@ -454,6 +462,7 @@ class Link:
                 "nodes": res,
                 "link_id": self._id,
                 "filters": self._filters,
+                "link_style": self._link_style,
                 "suspend": self._suspended
             }
         return {
@@ -466,5 +475,6 @@ class Link:
             "capture_compute_id": self.capture_compute_id,
             "link_type": self._link_type,
             "filters": self._filters,
+            "link_style": self._link_style,
             "suspend": self._suspended
         }