robh2 97f31560ca Adding P4D2_2018_East Folder (#116)
* Copying P4D2 Fall 2017 into P4D2 2018 East.

* Updated P4D2_2018_East VM.  Added vagrant URL workaround, cdrom to VM.  Updated to latest commits of BMV2, p4c, PI.  Known issue with p4runtime exercise.

* Applied patch from @antoninbas in  and updated solution
2018-03-04 03:50:22 -05:00

123 lines
4.4 KiB
Python

# Copyright 2017-present Barefoot Networks, Inc.
# 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.
#
import sys, os, tempfile, socket
from time import sleep
from mininet.node import Switch
from mininet.moduledeps import pathCheck
from mininet.log import info, error, debug
from p4_mininet import P4Switch, SWITCH_START_TIMEOUT
from netstat import check_listening_on_port
class P4RuntimeSwitch(P4Switch):
"BMv2 switch with gRPC support"
next_grpc_port = 50051
def __init__(self, name, sw_path = None, json_path = None,
grpc_port = None,
pcap_dump = False,
log_console = False,
verbose = False,
device_id = None,
enable_debugger = False,
**kwargs):
Switch.__init__(self, name, **kwargs)
assert (sw_path)
self.sw_path = sw_path
# make sure that the provided sw_path is valid
pathCheck(sw_path)
if json_path is not None:
# make sure that the provided JSON file exists
if not os.path.isfile(json_path):
error("Invalid JSON file.\n")
exit(1)
self.json_path = json_path
else:
self.json_path = None
if grpc_port is not None:
self.grpc_port = grpc_port
else:
self.grpc_port = P4RuntimeSwitch.next_grpc_port
P4RuntimeSwitch.next_grpc_port += 1
if check_listening_on_port(self.grpc_port):
error('%s cannot bind port %d because it is bound by another process\n' % (self.name, self.grpc_port))
exit(1)
self.verbose = verbose
logfile = "/tmp/p4s.{}.log".format(self.name)
self.output = open(logfile, 'w')
self.pcap_dump = pcap_dump
self.enable_debugger = enable_debugger
self.log_console = log_console
if device_id is not None:
self.device_id = device_id
P4Switch.device_id = max(P4Switch.device_id, device_id)
else:
self.device_id = P4Switch.device_id
P4Switch.device_id += 1
self.nanomsg = "ipc:///tmp/bm-{}-log.ipc".format(self.device_id)
def check_switch_started(self, pid):
for _ in range(SWITCH_START_TIMEOUT * 2):
if not os.path.exists(os.path.join("/proc", str(pid))):
return False
if check_listening_on_port(self.grpc_port):
return True
sleep(0.5)
def start(self, controllers):
info("Starting P4 switch {}.\n".format(self.name))
args = [self.sw_path]
for port, intf in self.intfs.items():
if not intf.IP():
args.extend(['-i', str(port) + "@" + intf.name])
if self.pcap_dump:
args.append("--pcap")
if self.nanomsg:
args.extend(['--nanolog', self.nanomsg])
args.extend(['--device-id', str(self.device_id)])
P4Switch.device_id += 1
if self.json_path:
args.append(self.json_path)
else:
args.append("--no-p4")
if self.enable_debugger:
args.append("--debugger")
if self.log_console:
args.append("--log-console")
if self.grpc_port:
args.append("-- --grpc-server-addr 0.0.0.0:" + str(self.grpc_port))
cmd = ' '.join(args)
info(cmd + "\n")
logfile = "/tmp/p4s.{}.log".format(self.name)
pid = None
with tempfile.NamedTemporaryFile() as f:
self.cmd(cmd + ' >' + logfile + ' 2>&1 & echo $! >> ' + f.name)
pid = int(f.read())
debug("P4 switch {} PID is {}.\n".format(self.name, pid))
if not self.check_switch_started(pid):
error("P4 switch {} did not start correctly.\n".format(self.name))
exit(1)
info("P4 switch {} has been started.\n".format(self.name))