diff options
Diffstat (limited to 'resources/libraries/python/NATUtil.py')
| -rw-r--r-- | resources/libraries/python/NATUtil.py | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/resources/libraries/python/NATUtil.py b/resources/libraries/python/NATUtil.py index 620e14aea1..36f9da3994 100644 --- a/resources/libraries/python/NATUtil.py +++ b/resources/libraries/python/NATUtil.py @@ -96,6 +96,10 @@ class NATUtil: flag=u"NAT_IS_NONE"): """Set NAT44 address range. + The return value is a callable (zero argument Python function) + which can be used to reset NAT state, so repeated trial measurements + hit the same slow path. + :param node: DUT node. :param start_ip: IP range start. :param end_ip: IP range end. @@ -106,6 +110,8 @@ class NATUtil: :type end_ip: str :type vrf_id: int :type flag: str + :returns: Resetter of the NAT state. + :rtype: Callable[[], None] """ cmd = u"nat44_add_del_address_range" err_msg = f"Failed to set NAT44 address range on host {node[u'host']}" @@ -120,6 +126,18 @@ class NATUtil: with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args_in).get_reply(err_msg) + # A closure, accessing the variables above. + def resetter(): + """Delete and re-add the NAT range setting.""" + with PapiSocketExecutor(node) as papi_exec: + args_in[u"is_add"] = False + papi_exec.add(cmd, **args_in) + args_in[u"is_add"] = True + papi_exec.add(cmd, **args_in) + papi_exec.get_replies(err_msg) + + return resetter + @staticmethod def show_nat_config(node): """Show the NAT configuration. @@ -279,6 +297,10 @@ class NATUtil: def set_det44_mapping(node, ip_in, subnet_in, ip_out, subnet_out): """Set DET44 mapping. + The return value is a callable (zero argument Python function) + which can be used to reset NAT state, so repeated trial measurements + hit the same slow path. + :param node: DUT node. :param ip_in: Inside IP. :param subnet_in: Inside IP subnet. @@ -303,6 +325,18 @@ class NATUtil: with PapiSocketExecutor(node) as papi_exec: papi_exec.add(cmd, **args_in).get_reply(err_msg) + # A closure, accessing the variables above. + def resetter(): + """Delete and re-add the deterministic NAT mapping.""" + with PapiSocketExecutor(node) as papi_exec: + args_in[u"is_add"] = False + papi_exec.add(cmd, **args_in) + args_in[u"is_add"] = True + papi_exec.add(cmd, **args_in) + papi_exec.get_replies(err_msg) + + return resetter + @staticmethod def get_det44_mapping(node): """Get DET44 mapping data. @@ -325,14 +359,12 @@ class NATUtil: def get_det44_sessions_number(node): """Get number of established DET44 sessions from actual DET44 mapping data. - :param node: DUT node. :type node: dict :returns: Number of established DET44 sessions. :rtype: int """ det44_data = NATUtil.get_det44_mapping(node) - return det44_data.get(u"ses_num", 0) @staticmethod |