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#!/usr/bin/env python3
# -*- coding: utf-8 eval: (blacken-mode 1) -*-
# SPDX-License-Identifier: MIT
#
# February 22 2022, Christian Hopps <chopps@labn.net>
#
# Copyright (c) 2022, LabN Consulting, L.L.C.
import argparse
import logging
import os
import sys
import pytest
CWD = os.path.dirname(os.path.realpath(__file__))
# This is painful but works if you have installed grpc and grpc_tools would be *way*
# better if we actually built and installed these but ... python packaging.
try:
import grpc
import grpc_tools
sys.path.append(os.path.dirname(CWD))
from munet.base import commander
commander.cmd_raises(f"cp {CWD}/../../../grpc/frr-northbound.proto .")
commander.cmd_raises(
f"python -m grpc_tools.protoc --python_out=. --grpc_python_out=. -I . frr-northbound.proto"
)
except Exception as error:
logging.error("can't create proto definition modules %s", error)
raise
try:
sys.path[0:0] = "."
import frr_northbound_pb2
import frr_northbound_pb2_grpc
# Would be nice if compiling the modules internally from the source worked
# # import grpc_tools.protoc
# # proto_include = pkg_resources.resource_filename("grpc_tools", "_proto")
# from grpc_tools.protoc import _proto_file_to_module_name, _protos_and_services
# try:
# frr_northbound_pb2, frr_northbound_pb2_grpc = _protos_and_services(
# "frr_northbound.proto"
# )
# finally:
# os.chdir(CWD)
except Exception as error:
logging.error("can't import proto definition modules %s", error)
raise
class GRPCClient:
def __init__(self, server, port):
self.channel = grpc.insecure_channel("{}:{}".format(server, port))
self.stub = frr_northbound_pb2_grpc.NorthboundStub(self.channel)
def get_capabilities(self):
request = frr_northbound_pb2.GetCapabilitiesRequest()
response = "NONE"
try:
response = self.stub.GetCapabilities(request)
except Exception as error:
logging.error("Got exception from stub: %s", error)
logging.debug("GRPC Capabilities: %s", response)
return response
def get(self, xpath):
request = frr_northbound_pb2.GetRequest()
request.path.append(xpath)
request.type = frr_northbound_pb2.GetRequest.ALL
request.encoding = frr_northbound_pb2.XML
xml = ""
for r in self.stub.Get(request):
logging.info('GRPC Get path: "%s" value: %s', request.path, r)
xml += str(r.data.data)
return xml
def next_action(action_list=None):
"Get next action from list or STDIN"
if action_list:
for action in action_list:
yield action
else:
while True:
try:
action = input("")
if not action:
break
yield action.strip()
except EOFError:
break
def main(*args):
parser = argparse.ArgumentParser(description="gRPC Client")
parser.add_argument(
"-s", "--server", default="localhost", help="gRPC Server Address"
)
parser.add_argument(
"-p", "--port", type=int, default=50051, help="gRPC Server TCP Port"
)
parser.add_argument("-v", "--verbose", action="store_true", help="be verbose")
parser.add_argument("--check", action="store_true", help="check runable")
parser.add_argument("actions", nargs="*", help="GETCAP|GET,xpath")
args = parser.parse_args(*args)
level = logging.DEBUG if args.verbose else logging.INFO
logging.basicConfig(
level=level,
format="%(asctime)s %(levelname)s: GRPC-CLI-CLIENT: %(name)s %(message)s",
)
if args.check:
sys.exit(0)
c = GRPCClient(args.server, args.port)
for action in next_action(args.actions):
action = action.casefold()
logging.info("GOT ACTION: %s", action)
if action == "getcap":
caps = c.get_capabilities()
print("Capabilities:", caps)
elif action.startswith("get,"):
# Print Interface State and Config
_, xpath = action.split(",", 1)
print("Get XPath: ", xpath)
xml = c.get(xpath)
print("{}: {}".format(xpath, xml))
# for _ in range(0, 1):
if __name__ == "__main__":
main()
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