"""Parse JSON for TFM based table config."""
from faucet import valve_of
[docs]class LoadRyuTables:
"""Serialize table features messages from JSON."""
[docs] @staticmethod
def load_tables(dp): # pylint: disable=invalid-name
table_array = []
active_table_ids = sorted([valve_table.table_id for valve_table in dp.tables.values()])
for table_id in active_table_ids:
valve_table = dp.table_by_id(table_id)
table_attr = {
'config': 3,
'max_entries': valve_table.table_config.size,
'metadata_match': 0,
'metadata_write': 0,
'name': valve_table.name.encode('utf-8'),
'properties': [],
'table_id': table_id,
}
new_table = valve_of.parser.OFPTableFeaturesStats(**table_attr)
# Match types
if valve_table.match_types:
oxm_ids = [
valve_of.parser.OFPOxmId(type_=match_type, hasmask=hasmask)
for match_type, hasmask in list(valve_table.match_types.items())]
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropOxm(
oxm_ids=oxm_ids, type_=valve_of.ofp.OFPTFPT_MATCH))
# Not an exact match table, assume all fields wildcarded.
if not valve_table.exact_match:
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropOxm(
oxm_ids=oxm_ids, type_=valve_of.ofp.OFPTFPT_WILDCARDS))
# Next tables
next_tables = [
table_id for table_id in active_table_ids if table_id > new_table.table_id]
if next_tables:
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropNextTables(
table_ids=next_tables, type_=valve_of.ofp.OFPTFPT_NEXT_TABLES))
# Instructions
insts = set([valve_of.ofp.OFPIT_APPLY_ACTIONS])
if next_tables:
insts.add(valve_of.ofp.OFPIT_GOTO_TABLE)
if valve_table.table_config.meter:
insts.add(valve_of.ofp.OFPIT_METER)
inst_ids = [
valve_of.parser.OFPInstructionId(type_) for type_ in insts]
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropInstructions(
type_=valve_of.ofp.OFPTFPT_INSTRUCTIONS, instruction_ids=inst_ids))
apply_actions = set()
# Set fields and apply actions
if valve_table.set_fields:
apply_actions.add(valve_of.ofp.OFPAT_SET_FIELD)
# TODO: only select push_vlan when VLAN VID in set_fields.
apply_actions.add(valve_of.ofp.OFPAT_PUSH_VLAN)
oxm_ids = [
valve_of.parser.OFPOxmId(type_=field, hasmask=False)
for field in valve_table.set_fields]
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropOxm(
oxm_ids=oxm_ids, type_=valve_of.ofp.OFPTFPT_APPLY_SETFIELD))
if valve_table.table_config.output:
apply_actions.add(valve_of.ofp.OFPAT_OUTPUT)
apply_actions.add(valve_of.ofp.OFPAT_POP_VLAN)
if dp.group_table or dp.group_table_routing:
apply_actions.add(valve_of.ofp.OFPAT_GROUP)
if apply_actions:
action_ids = [
valve_of.parser.OFPActionId(type_) for type_ in apply_actions]
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropActions(
type_=valve_of.ofp.OFPTFPT_APPLY_ACTIONS, action_ids=action_ids))
# Miss goto table option.
if valve_table.table_config.miss_goto:
miss_table_id = dp.tables[valve_table.table_config.miss_goto].table_id
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropNextTables(
table_ids=[miss_table_id], type_=valve_of.ofp.OFPTFPT_NEXT_TABLES_MISS))
inst_ids = [valve_of.parser.OFPInstructionId(valve_of.ofp.OFPIT_GOTO_TABLE)]
new_table.properties.append(
valve_of.parser.OFPTableFeaturePropInstructions(
type_=valve_of.ofp.OFPTFPT_INSTRUCTIONS_MISS, instruction_ids=inst_ids))
table_array.append(new_table)
return table_array