def test_view_change_finished_is_sent_by_non_primary_once_view_change_certificate_is_reached_and_new_view_from_primary( internal_bus, external_bus, validators, primary, view_change_service_builder, initial_view_no, some_item, is_master): # TODO: Need to decide on how we handle this case if not is_master: return handler = Mock() internal_bus.subscribe(NewViewAccepted, handler) next_view_no = initial_view_no + 1 primary_name = primary(next_view_no) non_primary_name = some_item(validators, exclude=[primary_name]) service = view_change_service_builder(non_primary_name) vc = create_view_change(initial_view_no) service._data.preprepared = vc.preprepared service._data.prepared = vc.prepared service._data.stable_checkpoint = vc.stableCheckpoint service._data.checkpoints = vc.checkpoints old_data = copy_shared_data(service._data) # start view change internal_bus.send(NeedViewChange()) external_bus.sent_messages.clear() # receive quorum of ViewChanges and ViewChangeAcks non_primaries = [item for item in validators if item != primary_name] non_primaries = random.sample(non_primaries, service._data.quorums.view_change.value) new_view = create_new_view_from_vc(vc, non_primaries) for vc_frm in non_primaries: external_bus.process_incoming( vc, generateName(vc_frm, service._data.inst_id)) for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries): external_bus.process_incoming( ack, generateName(ack_frm, service._data.inst_id)) # check that NewViewAccepted hasn't been sent if NewView is from non-primary external_bus.process_incoming( new_view, generateName(non_primary_name, service._data.inst_id)) handler.assert_not_called() assert service._data.view_no == initial_view_no + 1 assert service._data.waiting_for_new_view # check that NewViewAccepted has been sent if NewView is from primary external_bus.process_incoming( new_view, generateName(primary_name, service._data.inst_id)) expected_finish_vc = NewViewAccepted(view_no=initial_view_no + 1, view_changes=new_view.viewChanges, checkpoint=new_view.checkpoint, batches=new_view.batches) handler.assert_called_with(expected_finish_vc) # check that shared data is updated new_data = copy_shared_data(service._data) check_service_changed_only_owned_fields_in_shared_data( ViewChangeService, old_data, new_data) assert service._data.view_no == initial_view_no + 1 assert not service._data.waiting_for_new_view
def test_send_instance_change_on_new_view_with_incorrect_checkpoint( internal_bus, external_bus, validators, primary, view_change_service_builder, initial_view_no, some_item, is_master): # TODO: Need to decide on how we handle this case if not is_master: return next_view_no = initial_view_no + 1 primary_name = primary(next_view_no) non_primary_name = some_item(validators, exclude=[primary_name]) service = view_change_service_builder(non_primary_name) vc = create_view_change(initial_view_no) service._data.preprepared = vc.preprepared service._data.prepared = vc.prepared service._data.stable_checkpoint = vc.stableCheckpoint service._data.checkpoints = vc.checkpoints # start view change internal_bus.send(NeedViewChange()) external_bus.sent_messages.clear() # receive quorum of ViewChanges and ViewChangeAcks non_primaries = [item for item in validators if item != primary_name] non_primaries = random.sample(non_primaries, service._data.quorums.view_change.value) for vc_frm in non_primaries: external_bus.process_incoming( vc, generateName(vc_frm, service._data.inst_id)) for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries): external_bus.process_incoming( ack, generateName(ack_frm, service._data.inst_id)) cp = Checkpoint(instId=0, viewNo=initial_view_no, seqNoStart=0, seqNoEnd=1000, digest=cp_digest(1000)) new_view = create_new_view_from_vc(vc, non_primaries, checkpoint=cp) # send NewView by Primary init_network_msg_count = len(external_bus.sent_messages) external_bus.process_incoming( new_view, generateName(primary_name, service._data.inst_id)) # we don't go to new view, just send Instance Change assert service._data.view_no == initial_view_no + 1 assert init_network_msg_count + 1 == len(external_bus.sent_messages) msg, dst = external_bus.sent_messages[-1] assert dst is None # broadcast assert isinstance(msg, InstanceChange) assert msg.viewNo == initial_view_no + 2 assert msg.reason == Suspicions.NEW_VIEW_INVALID_CHECKPOINTS.code
def test_new_view_incorrect_checkpoint(internal_bus, validators, primary, view_change_service_builder, initial_view_no, some_item): next_view_no = initial_view_no + 1 primary_name = primary(next_view_no) non_primary_name = some_item(validators, exclude=[primary_name]) service = view_change_service_builder(non_primary_name) vc = create_view_change(initial_view_no) service._data.preprepared = vc.preprepared service._data.prepared = vc.prepared service._data.stable_checkpoint = vc.stableCheckpoint service._data.checkpoints = vc.checkpoints # start view change internal_bus.send(NeedViewChange()) service._network.sent_messages.clear() handler = Mock() internal_bus.subscribe(NeedViewChange, handler) # receive quorum of ViewChanges and ViewChangeAcks non_primaries = [item for item in validators if item != primary_name] non_primaries = random.sample(non_primaries, service._data.quorums.view_change.value) for vc_frm in non_primaries: service._network.process_incoming(vc, vc_frm) for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries): service._network.process_incoming(ack, ack_frm) cp = Checkpoint(instId=0, viewNo=initial_view_no, seqNoStart=0, seqNoEnd=1000, digest=cp_digest(1000)) new_view = create_new_view_from_vc(vc, non_primaries, checkpoint=cp) # send NewView by Primary service._network.process_incoming(new_view, primary_name) # make sure that NeedViewChange is called handler.assert_called_with(NeedViewChange()) # make sure that we get to the next view assert service._data.view_no == initial_view_no + 2 assert service._data.waiting_for_new_view
def test_new_view_from_malicious(view_change_service_builder, primary, initial_view_no, validators): """ This test shows situation, when there is quorum of correct NEW_VIEW msgs and NEW_VIEW msg from malicious primary. In this case, view_change will be completed by quorum of the same NEW_VIEW msgs not by NEW_VIEW from malicious """ proposed_view_no = initial_view_no + 1 primary_name = primary(proposed_view_no) without_primary = [v for v in validators if v != primary_name] vcs_name = without_primary[0] vcs = view_change_service_builder(vcs_name) vcs._data.is_master = True vcs.process_need_view_change(NeedViewChange(view_no=proposed_view_no)) vc_not_malicious = vcs.view_change_votes._get_vote(vcs_name).view_change not_malicious_nv = create_new_view_from_vc(vc_not_malicious, without_primary, checkpoint=vc_not_malicious.checkpoints[-1]) vc_from_malicious = create_view_change(initial_view_no, stable_cp=20, batches=[]) for i in range(0, len(without_primary)): vcs.view_change_votes.add_view_change(vc_not_malicious, without_primary[i]) vcs._data.new_view_votes.add_new_view(not_malicious_nv, without_primary[i]) vcs.view_change_votes.add_view_change(vc_from_malicious, primary_name) malicious_nv = NewView(viewNo=proposed_view_no, viewChanges=[[primary_name, view_change_digest(vc_from_malicious)]], checkpoint=Checkpoint(instId=0, viewNo=initial_view_no, seqNoStart=10, seqNoEnd=20, digest=cp_digest(20)), batches=[]) vcs.process_new_view_message(malicious_nv, "{}:{}".format(primary_name, 0)) assert not vcs._data.waiting_for_new_view
def test_view_change_finished_is_sent_by_primary_once_view_change_certificate_is_reached( internal_bus, validators, primary, view_change_service_builder, initial_view_no): handler = Mock() internal_bus.subscribe(NewViewAccepted, handler) primary_name = primary(initial_view_no + 1) service = view_change_service_builder(primary_name) # start view change internal_bus.send(NeedViewChange()) service._network.sent_messages.clear() old_data = copy_shared_data(service._data) # receive quorum of ViewChanges and ViewChangeAcks non_primaries = [item for item in validators if item != primary_name] non_primaries = random.sample(non_primaries, service._data.quorums.view_change.value) vc = create_view_change(initial_view_no) new_view = create_new_view_from_vc(vc, non_primaries) for vc_frm in non_primaries: service._network.process_incoming(vc, vc_frm) for ack, ack_frm in create_view_change_acks(vc, vc_frm, non_primaries): service._network.process_incoming(ack, ack_frm) # check that NewViewAccepted has been sent expected_finish_vc = NewViewAccepted(view_no=initial_view_no + 1, view_changes=new_view.viewChanges, checkpoint=new_view.checkpoint, batches=new_view.batches) handler.assert_called_with(expected_finish_vc) # check that shared data is updated new_data = copy_shared_data(service._data) check_service_changed_only_owned_fields_in_shared_data( ViewChangeService, old_data, new_data) assert service._data.view_no == initial_view_no + 1 assert not service._data.waiting_for_new_view