| import os |
| import socket |
| import re |
| import json |
| import urllib2 |
| |
| from mininet.log import info, warn, error |
| from mininet.node import Switch |
| |
| if 'ONOS_ROOT' not in os.environ: |
| error("ERROR: environment var $ONOS_ROOT not set") |
| exit() |
| |
| BMV2_TARGET = 'simple_switch_grpc' |
| ONOS_ROOT = os.environ["ONOS_ROOT"] |
| CPU_PORT = 255 |
| |
| |
| class ONOSBmv2Switch(Switch): |
| """BMv2 software switch with gRPC server""" |
| |
| deviceId = 0 |
| instanceCount = 0 |
| |
| def __init__(self, name, json=None, debugger=False, loglevel="warn", elogger=False, |
| persistent=False, grpcPort=None, thriftPort=None, netcfg=True, **kwargs): |
| Switch.__init__(self, name, **kwargs) |
| self.grpcPort = ONOSBmv2Switch.pickUnusedPort() if not grpcPort else grpcPort |
| self.thriftPort = ONOSBmv2Switch.pickUnusedPort() if not thriftPort else thriftPort |
| if self.dpid: |
| self.deviceId = int(self.dpid, 0 if 'x' in self.dpid else 16) |
| else: |
| self.deviceId = ONOSBmv2Switch.deviceId |
| ONOSBmv2Switch.deviceId += 1 |
| self.json = json |
| self.debugger = debugger |
| self.loglevel = loglevel |
| self.logfile = '/tmp/bmv2-%d.log' % self.deviceId |
| self.elogger = elogger |
| self.persistent = persistent |
| self.netcfg = netcfg |
| self.netcfgfile = '/tmp/bmv2-%d-netcfg.json' % self.deviceId |
| if persistent: |
| self.exectoken = "/tmp/bmv2-%d-exec-token" % self.deviceId |
| self.cmd("touch %s" % self.exectoken) |
| # Store thrift port for future uses. |
| self.cmd("echo %d > /tmp/bmv2-%d-grpc-port" % (self.grpcPort, self.deviceId)) |
| |
| @classmethod |
| def pickUnusedPort(cls): |
| s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
| s.bind(('localhost', 0)) |
| addr, port = s.getsockname() |
| s.close() |
| return port |
| |
| def getSourceIp(self, dstIP): |
| """ |
| Queries the Linux routing table to get the source IP that can talk with dstIP, and vice |
| versa. |
| """ |
| ipRouteOut = self.cmd('ip route get %s' % dstIP) |
| r = re.search(r"src (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})", ipRouteOut) |
| return r.group(1) if r else None |
| |
| def doOnosNetcfg(self, controllerIP): |
| """ |
| Notifies ONOS about the new device via Netcfg. |
| """ |
| srcIP = self.getSourceIp(controllerIP) |
| if not srcIP: |
| warn("WARN: unable to get device IP address, won't do onos-netcfg") |
| return |
| onosDeviceId = "bmv2:%s" % self.deviceId |
| portData = {} |
| portId = 1 |
| for intfName in self.intfNames(): |
| if intfName == 'lo': |
| continue |
| portData[str(portId)] = { |
| "number": portId, |
| "name": intfName, |
| "enabled": True, |
| "removed": False, |
| "type": "copper", |
| "speed": 10000 |
| } |
| portId += 1 |
| |
| cfgData = { |
| "devices": { |
| "device:%s" % onosDeviceId: { |
| "generalprovider": { |
| "p4runtime": { |
| "ip": srcIP, |
| "port": self.grpcPort, |
| "deviceId": self.deviceId, |
| "deviceKeyId": "p4runtime:%s" % onosDeviceId |
| } |
| }, |
| "piPipeconf": { |
| "piPipeconfId": "" |
| }, |
| "basic": { |
| "driver": "bmv2" |
| }, |
| "ports": portData |
| } |
| } |
| } |
| with open(self.netcfgfile, 'w') as fp: |
| json.dump(cfgData, fp, indent=4) |
| # Build netcfg URL |
| url = 'http://%s:8181/onos/v1/network/configuration/' % controllerIP |
| # Instantiate password manager for HTTP auth |
| pm = urllib2.HTTPPasswordMgrWithDefaultRealm() |
| pm.add_password(None, url, os.environ['ONOS_WEB_USER'], os.environ['ONOS_WEB_PASS']) |
| urllib2.install_opener(urllib2.build_opener(urllib2.HTTPBasicAuthHandler(pm))) |
| # Push config data to controller |
| req = urllib2.Request(url, json.dumps(cfgData), {'Content-Type': 'application/json'}) |
| try: |
| f = urllib2.urlopen(req) |
| print f.read() |
| f.close() |
| except urllib2.URLError as e: |
| warn("WARN: unable to push config to ONOS (%s)" % e.reason) |
| |
| def start(self, controllers): |
| args = [BMV2_TARGET, '--device-id %s' % str(self.deviceId)] |
| for port, intf in self.intfs.items(): |
| if not intf.IP(): |
| args.append('-i %d@%s' % (port, intf.name)) |
| if self.elogger: |
| nanomsg = 'ipc:///tmp/bmv2-%d-log.ipc' % self.deviceId |
| args.append('--nanolog %s' % nanomsg) |
| if self.debugger: |
| args.append('--debugger') |
| args.append('--log-console') |
| args.append('-L%s' % self.loglevel) |
| args.append('--thrift-port %d' % self.thriftPort) |
| if not self.json: |
| args.append('--no-p4') |
| else: |
| args.append(self.json) |
| |
| # gRPC target-specific options. |
| args.append('--') |
| args.append('--cpu-port %d' % CPU_PORT) |
| args.append('--grpc-server-addr 0.0.0.0:%d' % self.grpcPort) |
| |
| bmv2cmd = " ".join(args) |
| info("\nStarting BMv2 target: %s\n" % bmv2cmd) |
| |
| if self.persistent: |
| # Bash loop to re-exec the switch if it crashes. |
| bmv2cmd = "(while [ -e {} ]; do {} ; sleep 1; done;)".format(self.exectoken, bmv2cmd) |
| |
| cmdStr = "{} > {} 2>&1 &".format(bmv2cmd, self.logfile) |
| |
| # Starts the switch. |
| out = self.cmd(cmdStr) |
| if out: |
| print out |
| |
| if self.netcfg: |
| try: # onos.py |
| clist = controllers[0].nodes() |
| except AttributeError: |
| clist = controllers |
| assert len(clist) > 0 |
| cip = clist[0].IP() |
| self.doOnosNetcfg(cip) |
| |
| def stop(self, deleteIntfs=True): |
| """Terminate switch.""" |
| self.cmd("rm -f /tmp/bmv2-%d-*" % self.deviceId) |
| self.cmd("rm -f /tmp/bmv2-%d.log*" % self.deviceId) |
| self.cmd('kill %' + BMV2_TARGET) |
| Switch.stop(self, deleteIntfs) |
| |
| |
| # Exports for bin/mn |
| switches = {'onosbmv2': ONOSBmv2Switch} |