added simple_nat example

examples/simple_nat/topo.py

@@ -0,0 +1,113 @@
+#!/usr/bin/python
+
+# Copyright 2013-present Barefoot Networks, Inc.
+#
+# 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.
+
+from mininet.net import Mininet
+from mininet.topo import Topo
+from mininet.log import setLogLevel, info
+from mininet.cli import CLI
+from mininet.link import TCLink, Intf
+
+from p4_mininet import P4Switch, P4Host
+
+import argparse
+from time import sleep
+import os
+import subprocess
+
+parser = argparse.ArgumentParser(description='Mininet demo')
+parser.add_argument('--behavioral-exe', help='Path to behavioral executable',
+                    type=str, action="store", required=True)
+parser.add_argument('--json', help='Path to JSON config file',
+                    type=str, action="store", required=True)
+parser.add_argument('--cli', help='Path to BM CLI',
+                    type=str, action="store", required=True)
+parser.add_argument('--thrift-port', help='Thrift server port for table updates',
+                    type=int, action="store", required=True)
+
+args = parser.parse_args()
+
+class MyTopo(Topo):
+    def __init__(self, sw_path, json_path, thrift_port, **opts):
+        # Initialize topology and default options
+        Topo.__init__(self, **opts)
+
+        switch = self.addSwitch('s1',
+                                sw_path = sw_path,
+                                json_path = json_path,
+                                thrift_port = thrift_port,
+                                pcap_dump = True)
+
+        # internal host
+        h1 = self.addHost('h1',
+                          ip = "10.0.0.10",
+                          mac = "00:04:00:00:00:10")
+        self.addLink(h1, switch)
+
+        # external host
+        h2 = self.addHost('h2',
+                          ip = "192.168.0.10",
+                          mac = "00:05:00:00:00:10")
+        self.addLink(h2, switch)
+
+def main():
+    topo = MyTopo(args.behavioral_exe,
+                  args.json,
+                  args.thrift_port)
+
+    net = Mininet(topo = topo,
+                  host = P4Host,
+                  switch = P4Switch,
+                  controller = None)
+
+    cpu_intf = Intf("cpu-veth-1", net.get('s1'), 11)
+
+    net.start()
+
+    sw_macs = ["00:aa:bb:00:00:04", "00:aa:bb:00:00:05"]
+
+    sw_addrs = ["10.0.0.1", "192.168.0.1"]
+
+    for n in xrange(2):
+        h = net.get('h%d' % (n + 1))
+        h.setARP(sw_addrs[n], sw_macs[n])
+        h.setDefaultRoute("dev eth0 via %s" % sw_addrs[n])
+
+    for n in xrange(2):
+        h = net.get('h%d' % (n + 1))
+        h.describe()
+
+    sleep(1)
+
+    cmd = [args.cli, args.json, str(args.thrift_port)]
+    with open("commands.txt", "r") as f:
+        print " ".join(cmd)
+        try:
+            output = subprocess.check_output(cmd, stdin = f)
+            print output
+        except subprocess.CalledProcessError as e:
+            print e
+            print e.output
+
+    sleep(1)
+
+    print "Ready !"
+
+    CLI( net )
+    net.stop()
+
+if __name__ == '__main__':
+    setLogLevel( 'info' )
+    main()