Example #1
0
 def _init_switches(self):
     self.dpids = getStats.get_dpids()
     for dpid in self.dpids:
         vid = Vid(sw=dpid, host=0x00)
         switch = Switch(dpid=dpid, vid=vid)
         if dpid == self.DPID:
             self.switch = switch
         self.topo.addSwitch(switch)
         # table 0
         # handle arp request
         if Switch.is_edge_switch(dpid):
             postFlows.add_arp_request_flow(dpid, Vid.vid2mac(0x20, 0x00))
             postFlows.add_arp_dir_transfer_flow(dpid,
                                                 Vid.vid2mac(0x20, 0x00))
         # disable lldp
         postFlows.add_lldp_disable_flow(dpid)
         # rule for packet from hosts
         postFlows.add_host_packet_modify_flow(dpid)
         # set go to table 2
         postFlows.add_resubmit_flow(dpid, table_id=0, goto_id=2)
    def _handle_host_register(self, datapath, in_port, src_mac, src_ip, dst_ip):
        # proxy is registering
        # src_mac should be the hwaddr of host
        host = self.server.get_host(src_mac)
        if host:
            # host is registering its first vid
            self.logger.info('Vid register request received from %s', host.local_mac)
            self.server.register_host(host)
            self.server.add_host_receiving_entry(host)
            src_mac = host.fake_mac
            dst_mac = Vid.vid2mac(host.switch.vid.sw, host.vid.host)
            self._send_arp_reply(datapath, in_port, src_mac, dst_mac, src_ip, dst_ip)

            self.logger.info('Answer host register with vid %s', src_mac)
    def _handle_arp(self, datapath, in_port, src_mac, src_ip, dst_ip):
        self.logger.info("Handling ARP...")
        # arp askee
        dst_host = self.server.find_host_by_ip(dst_ip)
        self.logger.info("ARP askee is: %s", str(dst_host))
        # arp asker
        src_host = self.server.find_host_by_fake_mac(src_mac)
        self.logger.info("ARP asker is: %s", str(src_host))
        if dst_host and src_host:
            if self.server.add_host_forwarding_entry(src_host.switch.dpid, dst_host):
                self.logger.info("Adding new host forwarding entry to %s, host.fake_mac == %s", src_host.dpid, dst_host.fake_mac)

            dst_mac = dst_host.fake_mac
            src_mac = Vid.vid2mac(src_host.switch.vid.sw, src_host.vid.host)
            self.logger.info('PacketIn: ARP, %s is asking for %s', src_ip, dst_ip)
            self._send_arp_reply(datapath, in_port, dst_mac, src_mac, dst_ip, src_ip)
            self.logger.info('Answer ARP for %s with MAC address %s', dst_ip, dst_mac)
Example #4
0
    def answer_host_vid_update_request(self, host):
        affected_dpids = []
        new_host_vid = Vid.get_next_host_vid()
        self.del_host_receiving_flow(host.dpid, host.vid, host.port)
        self.del_host_forwarding_flow(host.dpid, host.vid, host.switch.vid)

        for switch in self.topo.switches.itervalues():
            affected = False
            for h in switch.host_forwarding_table:
                if h.vid == host.vid:
                    affected = True
                    affected_dpids.append(switch.dpid)
                    h.vid = new_host_vid
            if affected:
                self.del_host_forwarding_flow(switch.dpid, host.vid,
                                              host.switch.vid)
                self.add_host_forwarding_flow(switch.dpid, new_host_vid,
                                              host.switch.vid)

        host.update_vid(new_host_vid)
        host.set_fake_mac(Vid.vid2mac(host.vid.sw, host.vid.host))
        self.add_host_receiving_entry(host)

        return affected_dpids
Example #5
0
 def register_host(self, host):
     host.update_vid(Vid.get_next_host_vid())
     host.set_fake_mac(Vid.vid2mac(host.vid.sw, host.vid.host))
     self.topo.switches[host.dpid].addHost(host)
Example #6
0
 def add_arp_dir_transfer_flow(self, dpid):
     postFlows.add_arp_dir_transfer_flow(
         dpid, Vid.vid2mac(self.switch.vid.sw, self.vid.host))
Example #7
0
 def mod_arp_request_flow(self, dpid):
     postFlows.mod_arp_request_flow(
         dpid, Vid.vid2mac(self.switch.vid.sw, self.vid.host))