blob: 80f8f63d400fc84565205b26c639e9930f56f557 [file] [log] [blame]
#!/usr/bin/env python2.7
# -*- utf-8 -*-
import argparse
import google.protobuf.text_format as tf
import re
from p4.config.v1 import p4info_pb2
copyright = '''/*
* Copyright 2017-present Open Networking Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'''
imports = '''
import org.onosproject.net.pi.model.PiActionId;
import org.onosproject.net.pi.model.PiActionParamId;
import org.onosproject.net.pi.model.PiActionProfileId;
import org.onosproject.net.pi.model.PiControlMetadataId;
import org.onosproject.net.pi.model.PiCounterId;
import org.onosproject.net.pi.model.PiMatchFieldId;
import org.onosproject.net.pi.model.PiTableId;'''
PKG_FMT = 'package org.onosproject.pipelines.%s;'
CLASS_OPEN = 'public final class %s {'
CLASS_CLOSE = '}'
DEFAULT_CONSTRUCTOR = '''
// hide default constructor
private %s() {
}
'''
CONST_FMT = ' public static final %s %s = %s;'
SHORT_CONST_FMT =''' public static final %s %s =
%s;'''
JAVA_STR = 'String'
EMPTY_STR = ''
JAVA_DOC_FMT = '''/**
* Constants for %s pipeline.
*/'''
PI_HF_FIELD_ID = 'PiMatchFieldId'
PI_HF_FIELD_ID_CST = 'PiMatchFieldId.of("%s")'
PI_TBL_ID = 'PiTableId'
PI_TBL_ID_CST = 'PiTableId.of("%s")'
PI_CTR_ID = 'PiCounterId'
PI_CTR_ID_CST = 'PiCounterId.of("%s")'
PI_ACT_ID = 'PiActionId'
PI_ACT_ID_CST = 'PiActionId.of("%s")'
PI_ACT_PRM_ID = 'PiActionParamId'
PI_ACT_PRM_ID_CST = 'PiActionParamId.of("%s")'
PI_ACT_PROF_ID = 'PiActionProfileId'
PI_ACT_PROF_ID_CST = 'PiActionProfileId.of("%s")'
PI_PKT_META_ID = 'PiControlMetadataId'
PI_PKT_META_ID_CST = 'PiControlMetadataId.of("%s")'
HF_VAR_PREFIX = 'HDR_'
class ConstantClassGenerator(object):
headers = set()
header_fields = set()
tables = set()
counters = set()
direct_counters = set()
actions = set()
action_params = set()
action_profiles = set()
packet_metadata = set()
# https://stackoverflow.com/questions/1175208/elegant-python-function-to-convert-camelcase-to-snake-case
def convert_camel_to_all_caps(self, name):
s1 = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
s1 = re.sub('([a-z0-9])([A-Z])', r'\1_\2', s1).upper()
return s1.replace('.', '_')
def __init__(self, base_name):
self.class_name = base_name.title() + 'Constants'
self.package_name = PKG_FMT % (base_name, )
self.java_doc = JAVA_DOC_FMT % (base_name, )
def parse(self, p4info):
for tbl in p4info.tables:
for mf in tbl.match_fields:
self.header_fields.add(mf.name)
self.tables.add(tbl.preamble.name)
for ctr in p4info.counters:
self.counters.add(ctr.preamble.name)
for dir_ctr in p4info.direct_counters:
self.direct_counters.add(dir_ctr.preamble.name)
for act in p4info.actions:
self.actions.add(act.preamble.name)
for param in act.params:
self.action_params.add(param.name)
for act_prof in p4info.action_profiles:
self.action_profiles.add(act_prof.preamble.name)
for cpm in p4info.controller_packet_metadata:
for mta in cpm.metadata:
self.packet_metadata.add(mta.name)
def const_line(self, name, type, constructor):
var_name = self.convert_camel_to_all_caps(name)
if type == PI_HF_FIELD_ID:
var_name = HF_VAR_PREFIX + var_name
val = constructor % (name, )
line = CONST_FMT % (type, var_name, val)
if len(line) > 80:
line = SHORT_CONST_FMT % (type, var_name, val)
return line
def generate_java(self):
lines = list()
lines.append(copyright)
lines.append(self.package_name)
lines.append(imports)
lines.append(self.java_doc)
# generate the class
lines.append(CLASS_OPEN % (self.class_name, ))
lines.append(DEFAULT_CONSTRUCTOR % (self.class_name, ))
if len(self.header_fields) is not 0:
lines.append(' // Header field IDs')
for hf in self.header_fields:
lines.append(self.const_line(hf, PI_HF_FIELD_ID, PI_HF_FIELD_ID_CST))
if len(self.tables) is not 0:
lines.append(' // Table IDs')
for tbl in self.tables:
lines.append(self.const_line(tbl, PI_TBL_ID, PI_TBL_ID_CST))
if len(self.counters) is not 0:
lines.append(' // Indirect Counter IDs')
for ctr in self.counters:
lines.append(self.const_line(ctr, PI_CTR_ID, PI_CTR_ID_CST))
if len(self.direct_counters) is not 0:
lines.append(' // Direct Counter IDs')
for dctr in self.direct_counters:
lines.append(self.const_line(dctr, PI_CTR_ID, PI_CTR_ID_CST))
if len(self.actions) is not 0:
lines.append(' // Action IDs')
for act in self.actions:
lines.append(self.const_line(act, PI_ACT_ID, PI_ACT_ID_CST))
if len(self.action_params) is not 0:
lines.append(' // Action Param IDs')
for act_prm in self.action_params:
lines.append(self.const_line(act_prm, PI_ACT_PRM_ID, PI_ACT_PRM_ID_CST))
if len(self.action_profiles) is not 0:
lines.append(' // Action Profile IDs')
for act_prof in self.action_profiles:
lines.append(self.const_line(act_prof, PI_ACT_PROF_ID, PI_ACT_PROF_ID_CST))
if len(self.packet_metadata) is not 0:
lines.append(' // Packet Metadata IDs')
for pmeta in self.packet_metadata:
lines.append(self.const_line(pmeta, PI_PKT_META_ID, PI_PKT_META_ID_CST))
lines.append(CLASS_CLOSE)
# end of class
return '\n'.join(lines)
def main():
parser = argparse.ArgumentParser(prog='onos-gen-p4-constants',
description='ONOS P4Info to Java constant generator.')
parser.add_argument('name', help='Name of the constant, will be used as class name')
parser.add_argument('p4info', help='P4Info file')
parser.add_argument('-o', '--output', help='output path', default='-')
args = parser.parse_args()
base_name = args.name
file_name = args.p4info
p4info = p4info_pb2.P4Info()
with open(file_name, 'r') as intput_file:
s = intput_file.read()
tf.Merge(s, p4info)
gen = ConstantClassGenerator(base_name)
gen.parse(p4info)
java_code = gen.generate_java()
if args.output == '-':
# std output
print java_code
else:
with open(args.output, 'w') as output_file:
output_file.write(java_code)
if __name__ == '__main__':
main()