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
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robh2
Nate Foster
161
P4D2_2018_East/utils/mininet/p4_mininet.py
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161
P4D2_2018_East/utils/mininet/p4_mininet.py
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# Copyright 2013-present Barefoot Networks, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from mininet.net import Mininet
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from mininet.node import Switch, Host
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from mininet.log import setLogLevel, info, error, debug
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from mininet.moduledeps import pathCheck
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from sys import exit
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from time import sleep
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import os
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import tempfile
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import socket
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class P4Host(Host):
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def config(self, **params):
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r = super(P4Host, self).config(**params)
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for off in ["rx", "tx", "sg"]:
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cmd = "/sbin/ethtool --offload %s %s off" % (self.defaultIntf().name, off)
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self.cmd(cmd)
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# disable IPv6
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self.cmd("sysctl -w net.ipv6.conf.all.disable_ipv6=1")
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self.cmd("sysctl -w net.ipv6.conf.default.disable_ipv6=1")
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self.cmd("sysctl -w net.ipv6.conf.lo.disable_ipv6=1")
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return r
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def describe(self, sw_addr=None, sw_mac=None):
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print "**********"
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print "Network configuration for: %s" % self.name
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print "Default interface: %s\t%s\t%s" %(
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self.defaultIntf().name,
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self.defaultIntf().IP(),
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self.defaultIntf().MAC()
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)
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if sw_addr is not None or sw_mac is not None:
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print "Default route to switch: %s (%s)" % (sw_addr, sw_mac)
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print "**********"
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class P4Switch(Switch):
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"""P4 virtual switch"""
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device_id = 0
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def __init__(self, name, sw_path = None, json_path = None,
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log_file = None,
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thrift_port = None,
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pcap_dump = False,
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log_console = False,
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verbose = False,
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device_id = None,
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enable_debugger = False,
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**kwargs):
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Switch.__init__(self, name, **kwargs)
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assert(sw_path)
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assert(json_path)
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# make sure that the provided sw_path is valid
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pathCheck(sw_path)
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# make sure that the provided JSON file exists
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if not os.path.isfile(json_path):
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error("Invalid JSON file.\n")
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exit(1)
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self.sw_path = sw_path
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self.json_path = json_path
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self.verbose = verbose
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self.log_file = log_file
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if self.log_file is None:
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self.log_file = "/tmp/p4s.{}.log".format(self.name)
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self.output = open(self.log_file, 'w')
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self.thrift_port = thrift_port
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self.pcap_dump = pcap_dump
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self.enable_debugger = enable_debugger
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self.log_console = log_console
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if device_id is not None:
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self.device_id = device_id
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P4Switch.device_id = max(P4Switch.device_id, device_id)
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else:
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self.device_id = P4Switch.device_id
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P4Switch.device_id += 1
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self.nanomsg = "ipc:///tmp/bm-{}-log.ipc".format(self.device_id)
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@classmethod
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def setup(cls):
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pass
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def check_switch_started(self, pid):
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"""While the process is running (pid exists), we check if the Thrift
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server has been started. If the Thrift server is ready, we assume that
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the switch was started successfully. This is only reliable if the Thrift
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server is started at the end of the init process"""
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while True:
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if not os.path.exists(os.path.join("/proc", str(pid))):
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return False
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.settimeout(0.5)
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result = sock.connect_ex(("localhost", self.thrift_port))
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if result == 0:
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return True
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def start(self, controllers):
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"Start up a new P4 switch"
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info("Starting P4 switch {}.\n".format(self.name))
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args = [self.sw_path]
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for port, intf in self.intfs.items():
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if not intf.IP():
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args.extend(['-i', str(port) + "@" + intf.name])
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if self.pcap_dump:
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args.append("--pcap")
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# args.append("--useFiles")
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if self.thrift_port:
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args.extend(['--thrift-port', str(self.thrift_port)])
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if self.nanomsg:
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args.extend(['--nanolog', self.nanomsg])
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args.extend(['--device-id', str(self.device_id)])
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P4Switch.device_id += 1
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args.append(self.json_path)
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if self.enable_debugger:
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args.append("--debugger")
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if self.log_console:
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args.append("--log-console")
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info(' '.join(args) + "\n")
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pid = None
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with tempfile.NamedTemporaryFile() as f:
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# self.cmd(' '.join(args) + ' > /dev/null 2>&1 &')
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self.cmd(' '.join(args) + ' >' + self.log_file + ' 2>&1 & echo $! >> ' + f.name)
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pid = int(f.read())
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debug("P4 switch {} PID is {}.\n".format(self.name, pid))
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sleep(1)
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if not self.check_switch_started(pid):
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error("P4 switch {} did not start correctly."
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"Check the switch log file.\n".format(self.name))
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exit(1)
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info("P4 switch {} has been started.\n".format(self.name))
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def stop(self):
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"Terminate P4 switch."
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self.output.flush()
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self.cmd('kill %' + self.sw_path)
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self.cmd('wait')
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self.deleteIntfs()
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def attach(self, intf):
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"Connect a data port"
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assert(0)
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def detach(self, intf):
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"Disconnect a data port"
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assert(0)
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