Begin to implement egress handling, make controller usable, update notes

p4app/controller.py

@@ -12,6 +12,9 @@ import sys
 import re
 
 import logging
+import argparse
+import ipaddress
+
 logging.basicConfig()
 log = logging.getLogger("main")
 
@@ -20,6 +23,18 @@ class L2Controller(object):
         self.init_boilerplate(sw_name)
         self.init()
 
+        self.modes = ['base']
+
+        # Network / egress
+        self.v6_routes = {}
+        self.v6_routes['base'] = []
+        self.v6_routes['base'].append({ "net": "2001:db8:61::/64", "port": "1"})
+        self.v6_routes['base'].append({ "net": "2001:db8:62::/64", "port": "2"})
+        self.v4_routes = {}
+        self.v4_routes['base'] = []
+        self.v4_routes['base'].append({ "net": "10.0.41.0/24", "port": "3"})
+        self.v4_routes['base'].append({ "net": "10.0.42.0/24", "port": "4"})
+
     def init_boilerplate(self, sw_name):
         self.topo = Topology(db="topology.db")
         self.sw_name = sw_name
@@ -31,6 +46,7 @@ class L2Controller(object):
     def init(self):
         self.controller.reset_state()
         self.fill_tables()
+        self.config_hosts()
         self.add_mirror()
 
     def add_mirror(self):
@@ -38,6 +54,17 @@ class L2Controller(object):
             self.controller.mirroring_add(100, self.cpu_port)
 
     def fill_tables(self):
+        for v6route in self.v6_routes[self.mode]:
+            self.controller.table_add("v6_routing", "set_egress_port", [v6route['net']], [v6route['port']])
+
+        for v4route in self.v4_routes[self.mode]:
+            self.controller.table_add("v4_routing", "set_egress_port", [v4route['net']], [v4route['port']])
+
+    def config_hosts(self):
+        """ Assumptions:
+        - all routes are networks (no /128 v6 or /32 v4
+        - hosts get the first ip address in the network
+        """
         pass
 
     def debug_print_pkg(self, pkg, msg="INCOMING"):
@@ -78,6 +105,13 @@ class L2Controller(object):
     def run_cpu_port_loop(self):
         sniff(iface=self.intf, prn=self.recv_msg_cpu)
 
+    def commandline(self):
+        parser = argparse.ArgumentParser(description='controller++')
+        parser.add_argument('--mode', help='Select mode / settings to use', choices=self.modes)
+        args = parser.parse_args()
+        self.mode = args.mode
+
+
 if __name__ == "__main__":
     import sys
     import os
@@ -91,4 +125,7 @@ if __name__ == "__main__":
     log.debug("Debug enabled.")
 
     sw_name = "s1"
-    controller = L2Controller(sw_name).run_cpu_port_loop()
+    controller = L2Controller(sw_name)
+
+    controller.commandline()
+    controller.run_cpu_port_loop()