P4 Developer Day May 2019 (#252)

* Update user-bootstrap to use latest version (#251)

* p4c tests are failing in latest version. So, let's skip it during vagrant provisioning

* Update tutorial to use latest version of P4 tools

Modify switch.py to handle setting default_action
Use --p4runtime-files instead of deprecated --p4runtime-file and
--p4runtime-format flags
Provide standard_metadata for mark_to_drop

* Fix path for ECN exercise

utils/p4runtime_lib/switch.py

@@ -17,7 +17,8 @@ from abc import abstractmethod
 from datetime import datetime
 
 import grpc
-from p4 import p4runtime_pb2
+from p4.v1 import p4runtime_pb2
+from p4.v1 import p4runtime_pb2_grpc
 from p4.tmp import p4config_pb2
 
 MSG_LOG_MAX_LEN = 1024
@@ -41,7 +42,7 @@ class SwitchConnection(object):
         if proto_dump_file is not None:
             interceptor = GrpcRequestLogger(proto_dump_file)
             self.channel = grpc.intercept_channel(self.channel, interceptor)
-        self.client_stub = p4runtime_pb2.P4RuntimeStub(self.channel)
+        self.client_stub = p4runtime_pb2_grpc.P4RuntimeStub(self.channel)
         self.requests_stream = IterableQueue()
         self.stream_msg_resp = self.client_stub.StreamChannel(iter(self.requests_stream))
         self.proto_dump_file = proto_dump_file
@@ -89,7 +90,10 @@ class SwitchConnection(object):
         request.device_id = self.device_id
         request.election_id.low = 1
         update = request.updates.add()
-        update.type = p4runtime_pb2.Update.INSERT
+        if table_entry.is_default_action:
+            update.type = p4runtime_pb2.Update.MODIFY
+        else:
+            update.type = p4runtime_pb2.Update.INSERT
         update.entity.table_entry.CopyFrom(table_entry)
         if dry_run:
             print "P4Runtime Write:", request