grpc - add rpc to get local non-core interfaces

daemon/core/api/grpc/server.py

@@ -960,3 +960,11 @@ class CoreGrpcServer(core_pb2_grpc.CoreApiServicer):
             logging.exception("error opening session file")
             self.coreemu.delete_session(session.id)
             context.abort(grpc.StatusCode.INVALID_ARGUMENT, "invalid xml file")
+
+    def GetInterfaces(self, request, context):
+        interfaces = []
+        for interface in os.listdir("/sys/class/net"):
+            if interface.startswith("b.") or interface.startswith("veth") or interface == "lo":
+                continue
+            interfaces.append(interface)
+        return core_pb2.GetInterfacesResponse(interfaces=interfaces)

daemon/proto/core/api/grpc/core.proto

@@ -115,6 +115,10 @@ service CoreApi {
     }
     rpc OpenXml (OpenXmlRequest) returns (OpenXmlResponse) {
     }
+
+    // utilities
+    rpc GetInterfaces (GetInterfacesRequest) returns (GetInterfacesResponse) {
+    }
 }
 
 // rpc request/response messages
@@ -622,6 +626,13 @@ message OpenXmlResponse {
     int32 session_id = 2;
 }
 
+message GetInterfacesRequest {
+}
+
+message GetInterfacesResponse {
+    repeated string interfaces = 1;
+}
+
 // data structures for messages below
 message MessageType {
     enum Enum {