Class: Dcmgr::NodeModules::OpenFlowController

Inherits:
Trema::Controller
  • Object
show all
Includes:
Logger
Defined in:
lib/dcmgr/node_modules/openflow_controller.rb

Constant Summary collapse

@@route_directly = 
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@@load_dest_table = 
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@@send_src_table = 
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@@virtual_src = 
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@@virtual_dest = 
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@@arp_antispoof_table =

Re-number these…

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@@arp_route_table = 
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@@metadata_outgoing_table = 
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@@metadata_incoming_table = 
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@@mac_route_table = 
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Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logger

create, default_logdev, included

Constructor Details

#initialize(service_openflow) ⇒ OpenFlowController

Returns a new instance of OpenFlowController.



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 40

def initialize service_openflow
  @ports = {}
  @service_openflow = service_openflow
  @ovs_ofctl = OvsOfctl.new service_openflow.node.manifest.config
end

Instance Attribute Details

#local_hw ⇒ Object (readonly)

Returns the value of attribute local_hw.



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 23

def local_hw
  @local_hw
end

#ovs_ofctl ⇒ Object (readonly)

Returns the value of attribute ovs_ofctl.



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 22

def ovs_ofctl
  @ovs_ofctl
end

#ports ⇒ Object (readonly)

Returns the value of attribute ports.



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 21

def ports
  @ports
end

Instance Method Details

#delete_port(port) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 155

def delete_port port
  port.lock.synchronize {
    return unless port.is_active
    port.is_active = false

    @ovs_ofctl.del_flows_from_list port.active_flows
    port.active_flows.clear
    port.queued_flows.clear
    ports.delete port.port_info.number
  }
end

#features_reply(message) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 59

def features_reply message
  logger.info  "features_reply from %#x." % message.datapath_id
  logger.debug "datapath_id: %#x" % message.datapath_id
  logger.debug "transaction_id: %#x" % message.transaction_id
  logger.debug "n_buffers: %u" % message.n_buffers
  logger.debug "n_tables: %u" % message.n_tables
  logger.debug "capabilities: %u" % message.capabilities
  logger.debug "actions: %u" % message.actions
  logger.info  "ports: %s" % message.ports.collect { | each | each.number }.sort.join( ", " )

  message.ports.each do | each |
    if each.number == OFPP_LOCAL
      @local_hw = each.hw_addr
      logger.debug "OFPP_LOCAL: hw_addr:#{@local_hw.to_s}"
    end
  end

  message.ports.each do | each |
    port = OpenFlowPort.new(each)
    port.is_active = true
    ports[each.number] = port

    if each.number >= OFPP_MAX
      # Do nothing...
    elsif each.name =~ /^eth/
      @service_openflow.add_eth port
    elsif each.name =~ /^vif-/
      @service_openflow.add_instance port
    elsif each.name =~ /^gre-/
      @service_openflow.add_tunnel port
    else
    end
  end

  # Build the routing flow table and some other flows using
  # ovs-ofctl due to the lack of multiple tables support, which
  # was introduced in of-spec 1.1.

  #
  # Classification
  #
  flows = []

  # DHCP queries from instances and network should always go to
  # local host, while queries from local host should go to the
  # network.
  flows << ["priority=#{5},udp,dl_dst=ff:ff:ff:ff:ff:ff,nw_src=0.0.0.0,nw_dst=255.255.255.255,tp_src=68,tp_dst=67", "local"]

  flows << ["priority=#{3},arp", "resubmit(,#{@@arp_antispoof_table})"]
  flows << ["priority=#{3},icmp", "resubmit(,#{@@load_dest_table})"]
  flows << ["priority=#{3},tcp", "resubmit(,#{@@load_dest_table})"]
  flows << ["priority=#{3},udp", "resubmit(,#{@@load_dest_table})"]

  flows << ["priority=#{2},in_port=local", "resubmit(,#{@@route_directly})"]

  #
  # MAC address routing
  #

  flows << ["priority=#{1},table=#{@@mac_route_table},dl_dst=#{@local_hw.to_s}", "local"]
  flows << ["priority=#{1},table=#{@@route_directly},dl_dst=#{@local_hw.to_s}", "local"]
  flows << ["priority=#{1},table=#{@@load_dest_table},dl_dst=#{@local_hw.to_s}", "load:#{OFPP_LOCAL}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"]

  # Some flows depend on only local being able to send packets
  # with the local mac and ip address, so drop those.
  flows << ["priority=#{6},table=#{@@send_src_table},in_port=local", "output:NXM_NX_REG0[]"]
  flows << ["priority=#{5},table=#{@@send_src_table},dl_src=#{@local_hw.to_s}", "drop"]
  flows << ["priority=#{5},table=#{@@send_src_table},ip,nw_src=#{Isono::Util.default_gw_ipaddr}", "drop"]

  #
  # ARP routing table
  #

  # ARP anti-spoofing flows.
  flows << ["priority=#{1},table=#{@@arp_antispoof_table},arp,in_port=local", "resubmit(,#{@@arp_route_table})"]

  # Replace drop actions with table default action.
  flows << ["priority=#{0},table=#{@@arp_antispoof_table},arp", "drop"]

  # TODO: How will this handle packets from host or eth0 that
  # spoof the mac of an instance?
  flows << ["priority=#{1},table=#{@@arp_route_table},arp,dl_dst=#{@local_hw.to_s}", "local"]

  #
  # Meta-data connections
  #
  flows << ["priority=#{5},tcp,nw_dst=169.254.169.254,tp_dst=80", "resubmit(,#{@@metadata_outgoing_table})"]
  flows << ["priority=#{5},tcp,nw_src=#{Isono::Util.default_gw_ipaddr},tp_src=#{9002}", "resubmit(,#{@@metadata_incoming_table})"]

  flows << ["priority=#{4},table=#{@@metadata_outgoing_table},in_port=local", "drop"]
  flows << ["priority=#{0},table=#{@@metadata_outgoing_table}", "controller"]

  @ovs_ofctl.add_flows_from_list flows        
  @service_openflow.networks.each { |network| update_network network[1] }
end

#install_arp_antispoof(port, hw, ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 340

def install_arp_antispoof port, hw, ip
  # Require correct ARP source IP/MAC from instance, and protect the instance IP from ARP spoofing.
  port.queue_flow "priority=#{3}", "table=#{@@arp_antispoof_table},arp,in_port=#{port.port_info.number},arp_sha=#{hw},nw_src=#{ip}", "resubmit(,#{@@arp_route_table})"
  port.queue_flow "priority=#{2}", "table=#{@@arp_antispoof_table},arp,arp_sha=#{hw}", "drop"
  port.queue_flow "priority=#{2}", "table=#{@@arp_antispoof_table},arp,nw_src=#{ip}", "drop"

  # Routing of ARP packets to instance.
  port.queue_flow "priority=#{2}", "table=#{@@arp_route_table},arp,dl_dst=#{hw},nw_dst=#{ip}", "output:#{port.port_info.number}"
end

#install_dnat_entry(datapath_id, message, outgoing_table, incoming_table, dest_port, dest_hw, dest_ip, dest_tp) ⇒ Object

Public functions



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 299

def install_dnat_entry datapath_id, message, outgoing_table, incoming_table, dest_port, dest_hw, dest_ip, dest_tp
  logger.info "Installing DNAT entry: #{dest_port} #{dest_hw} #{dest_ip}:#{dest_tp}"

  msg_nw_src = message.ipv4_saddr.to_s
  msg_nw_dst = message.ipv4_daddr.to_s

  # We don't need to match against the IP or port used by the
  # classifier to pass the flow to these tables.

  prefix = "priority=3,idle_timeout=#{300},tcp"

  prefix_outgoing = "#{prefix},table=#{outgoing_table},#{@ovs_ofctl.arg_in_port message.in_port}"
  # classifier_outgoing = "nw_dst=#{msg_nw_dst},tp_dst=#{message.tcp_dst_port}"
  match_outgoing = "dl_src=#{message.macsa.to_s},dl_dst=#{message.macda.to_s},nw_src=#{msg_nw_src},tp_src=#{message.tcp_src_port}"
  action_outgoing = "mod_dl_dst:#{dest_hw},mod_nw_dst:#{dest_ip},mod_tp_dst:#{dest_tp},#{@ovs_ofctl.arg_output dest_port}"

  prefix_incoming = "#{prefix},table=#{incoming_table},#{@ovs_ofctl.arg_in_port dest_port}"
  # classifier_incoming = "nw_src=#{dest_ip},tp_src=#{dest_tp}"
  match_incoming = "dl_src=#{dest_hw.to_s},dl_dst=#{message.macsa.to_s},nw_dst=#{msg_nw_src},tp_dst=#{message.tcp_src_port}"
  action_incoming = "mod_dl_src:#{message.macda.to_s},mod_nw_src:#{msg_nw_dst},mod_tp_src:#{message.tcp_dst_port},#{@ovs_ofctl.arg_output message.in_port}"

  @ovs_ofctl.add_flow "#{prefix_outgoing},#{match_outgoing}", action_outgoing
  @ovs_ofctl.add_flow "#{prefix_incoming},#{match_incoming}", action_incoming
end

#install_eth(port) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 507

def install_eth port
  port_number = port.port_info.number

  port.queue_flow "priority=#{6}", "udp,in_port=local,dl_dst=ff:ff:ff:ff:ff:ff,nw_src=0.0.0.0,nw_dst=255.255.255.255,tp_src=68,tp_dst=67", "output:#{port_number}"
  port.queue_flow "priority=#{2}", "in_port=#{port_number}",  "resubmit(,#{@@route_directly})"
  port.queue_flow "priority=#{0}", "table=#{@@mac_route_table}", "output:#{port_number}"
  port.queue_flow "priority=#{0}", "table=#{@@route_directly}", "output:#{port_number}"
  port.queue_flow "priority=#{0}", "table=#{@@load_dest_table}", "load:#{port_number}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"
  port.queue_flow "priority=#{4}", "table=#{@@send_src_table},in_port=#{port_number}", "output:NXM_NX_REG0[]"
  port.queue_flow "priority=#{1}", "table=#{@@arp_antispoof_table},arp,in_port=#{port_number}", "resubmit(,#{@@arp_route_table})"
  port.queue_flow "priority=#{0}", "table=#{@@arp_route_table},arp", "output:#{port_number}"
  port.queue_flow "priority=#{4}", "table=#{@@metadata_outgoing_table},in_port=#{port_number}", "drop"
end

#install_gre_tunnel(network_id, port) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 502

def install_gre_tunnel network_id, port
  port.is_tunnel = true
  port.queue_flow "priority=#{7}", "table=#{0},in_port=#{port.port_info.number}", "load:#{network_id}->NXM_NX_REG1[],load:#{port.port_info.number}->NXM_NX_REG2[],resubmit(,#{@@virtual_src})"
end

#install_local_icmp(port, hw, ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 437

def install_local_icmp port, hw, ip
  match_type = "dl_type=0x0800,nw_proto=1"

  learn_outgoing_match = "priority=#{2},idle_timeout=#{60},table=#{@@load_dest_table},#{match_type},NXM_OF_IN_PORT[],NXM_OF_ETH_SRC[],NXM_OF_ETH_DST[],NXM_OF_IP_SRC[],NXM_OF_IP_DST[]"
  learn_outgoing_actions = "output:NXM_NX_REG0[]"

  learn_incoming_match = "priority=#{2},idle_timeout=#{60},table=#{@@load_dest_table},#{match_type},NXM_OF_IN_PORT[]=NXM_NX_REG0[0..15],NXM_OF_ETH_SRC[]=NXM_OF_ETH_DST[],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],NXM_OF_IP_SRC[]=NXM_OF_IP_DST[],NXM_OF_IP_DST[]=NXM_OF_IP_SRC[]"
  learn_incoming_actions = "output:NXM_OF_IN_PORT[]"

  actions = "learn(#{learn_outgoing_match},#{learn_outgoing_actions}),learn(#{learn_incoming_match},#{learn_incoming_actions}),output:NXM_NX_REG0[]"

  port.queue_flow "priority=#{1}", "table=#{@@send_src_table},#{match_type},in_port=#{port.port_info.number},dl_src=#{hw},nw_src=#{ip}", actions
end

#install_local_transport(nw_proto, port, hw, ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 451

def install_local_transport nw_proto, port, hw, ip
  case nw_proto
  when 6
    transport_name = "TCP"
    idle_timeout = 7200
  when 17
    transport_name = "UDP"
    idle_timeout = 600
  end

  match_type = "dl_type=0x0800,nw_proto=#{nw_proto}"

  learn_outgoing_match = "priority=#{2},idle_timeout=#{idle_timeout},table=#{@@load_dest_table},#{match_type},NXM_OF_IN_PORT[],NXM_OF_ETH_SRC[],NXM_OF_ETH_DST[],NXM_OF_IP_SRC[],NXM_OF_IP_DST[],NXM_OF_#{transport_name}_SRC[],NXM_OF_#{transport_name}_DST[]"
  learn_outgoing_actions = "output:NXM_NX_REG0[]"

  learn_incoming_match = "priority=#{2},idle_timeout=#{idle_timeout},table=#{@@load_dest_table},#{match_type},NXM_OF_IN_PORT[]=NXM_NX_REG0[0..15],NXM_OF_ETH_SRC[]=NXM_OF_ETH_DST[],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],NXM_OF_IP_SRC[]=NXM_OF_IP_DST[],NXM_OF_IP_DST[]=NXM_OF_IP_SRC[],NXM_OF_#{transport_name}_SRC[]=NXM_OF_#{transport_name}_DST[],NXM_OF_#{transport_name}_DST[]=NXM_OF_#{transport_name}_SRC[]"
  learn_incoming_actions = "output:NXM_OF_IN_PORT[]"

  actions = "learn(#{learn_outgoing_match},#{learn_outgoing_actions}),learn(#{learn_incoming_match},#{learn_incoming_actions}),output:NXM_NX_REG0[]"

  port.queue_flow "priority=#{1}", "table=#{@@send_src_table},#{match_type},in_port=#{port.port_info.number},dl_src=#{hw},nw_src=#{ip}", actions
end

#install_physical_network(network) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 495

def install_physical_network network
  network.flood_flows << ["priority=#{1},table=#{@@mac_route_table},dl_dst=FF:FF:FF:FF:FF:FF", "", "output:<>", ""]
  network.flood_flows << ["priority=#{1},table=#{@@route_directly},dl_dst=FF:FF:FF:FF:FF:FF", "", "output:<>", ""]
  network.flood_flows << ["priority=#{1},table=#{@@load_dest_table},dl_dst=FF:FF:FF:FF:FF:FF", "", "load:<>->NXM_NX_REG0[],resubmit(,#{@@send_src_table})", ""]
  network.flood_flows << ["priority=#{1},table=#{@@arp_route_table},arp,dl_dst=FF:FF:FF:FF:FF:FF,arp_tha=00:00:00:00:00:00", "", "output:<>", ""]
end

#install_route(port, hw, ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 324

def install_route port, hw, ip
  # MAC address based routing to instance.
  port.queue_flow "priority=#{1}", "table=#{@@mac_route_table},dl_dst=#{hw}", "output:#{port.port_info.number}"

  port.queue_flow "priority=#{2}", "table=#{0},in_port=#{port.port_info.number},dl_src=#{hw}", "resubmit(,#{@@route_directly})"
  port.queue_flow "priority=#{1}", "table=#{@@route_directly},dl_dst=#{hw}", "output:#{port.port_info.number}"

  # @ovs_ofctl.add_flow "priority=#{1},table=#{@@load_dest_table},dl_dst=#{hw}", "load:#{port.port_info.number}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"
  port.queue_flow "priority=#{1}", "table=#{@@load_dest_table},dl_dst=#{hw}", "drop"
end

#install_static_d_transport(nw_proto, port, local_hw, local_ip, remote_ip, remote_port) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 399

def install_static_d_transport nw_proto, port, local_hw, local_ip, remote_ip, remote_port
  match_type = "dl_type=0x0800,nw_proto=#{nw_proto}"

  src_match = ""
  src_match << ",nw_src=#{remote_ip}" if not remote_ip =~ /\/0$/
  src_match << ",tp_src=#{remote_port}" if remote_port != 0
  dst_match = ""
  dst_match << ",nw_dst=#{remote_ip}" if not remote_ip =~ /\/0$/
  dst_match << ",tp_dst=#{remote_port}" if remote_port != 0

  incoming_match = "table=#{@@load_dest_table},#{match_type},dl_dst=#{local_hw},nw_dst=#{local_ip}#{src_match}"
  incoming_actions = "load:#{port.port_info.number}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"
  port.queue_flow "priority=#{3}", incoming_match, incoming_actions

  outgoing_match = "table=#{@@send_src_table},#{match_type},in_port=#{port.port_info.number},dl_src=#{local_hw},nw_src=#{local_ip}#{dst_match}"
  outgoing_actions = "output:NXM_NX_REG0[]"
  port.queue_flow "priority=#{3}", outgoing_match, outgoing_actions
end

#install_static_icmp(icmp_type, icmp_code, port, local_hw, local_ip, src_ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 363

def install_static_icmp icmp_type, icmp_code, port, local_hw, local_ip, src_ip
  match_type = "dl_type=0x0800,nw_proto=1"
  match_type << ",icmp_type=#{icmp_type}" if icmp_type >= 0
  match_type << ",icmp_code=#{icmp_code}" if icmp_code >= 0

  src_ip_match = ""
  src_ip_match << ",nw_src=#{src_ip}" if not src_ip =~ /\/0$/

  incoming_match = "table=#{@@load_dest_table},#{match_type},dl_dst=#{local_hw},nw_dst=#{local_ip}#{src_ip_match}"
  incoming_actions = "load:#{port.port_info.number}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"
  port.queue_flow "priority=#{3}", incoming_match, incoming_actions

  outgoing_match = "table=#{@@send_src_table},#{match_type},in_port=#{port.port_info.number},dl_src=#{local_hw},nw_src=#{local_ip}#{src_ip_match},"
  outgoing_actions = "output:NXM_NX_REG0[]"
  port.queue_flow "priority=#{3}", outgoing_match, outgoing_actions
end

#install_static_transport(nw_proto, port, local_hw, local_ip, local_port, remote_ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 380

def install_static_transport nw_proto, port, local_hw, local_ip, local_port, remote_ip
  match_type = "dl_type=0x0800,nw_proto=#{nw_proto}"

  src_match = ""
  src_match << ",nw_src=#{remote_ip}" if not remote_ip =~ /\/0$/
  src_match << ",tp_dst=#{local_port}" if local_port != 0
  dst_match = ""
  dst_match << ",nw_dst=#{remote_ip}" if not remote_ip =~ /\/0$/
  dst_match << ",tp_src=#{local_port}" if local_port != 0

  incoming_match = "table=#{@@load_dest_table},#{match_type},dl_dst=#{local_hw},nw_dst=#{local_ip}#{src_match}"
  incoming_actions = "load:#{port.port_info.number}->NXM_NX_REG0[],resubmit(,#{@@send_src_table})"
  port.queue_flow "priority=#{3}", incoming_match, incoming_actions

  outgoing_match = "table=#{@@send_src_table},#{match_type},in_port=#{port.port_info.number},dl_src=#{local_hw},nw_src=#{local_ip}#{dst_match}"
  outgoing_actions = "output:NXM_NX_REG0[]"
  port.queue_flow "priority=#{3}", outgoing_match, outgoing_actions
end

#install_virtual_arp_route(network, in_port, hw, ip, out_port, remote_hw, remote_ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 350

def install_virtual_arp_route network, in_port, hw, ip, out_port, remote_hw, remote_ip
  # Require correct ARP source IP/MAC from instance, and protect the instance IP from ARP spoofing.
  # port.queue_flow "priority=#{4}", "table=#{@@virtual_dest},arp,reg1=#{network.id},arp_sha=#{hw},nw_src=#{ip},dl_dst=#{remote_hw},nw_dst=#{remote_ip}", "output:#{out_port}"
  # port.queue_flow "priority=#{3}", "table=#{@@virtual_dest},arp,arp_sha=#{hw}", "drop"
  # port.queue_flow "priority=#{3}", "table=#{@@virtual_dest},arp,nw_src=#{ip}", "drop"

  # Make generic...
  add_flow in_port, "priority=#{4}", "table=#{@@virtual_dest},arp,reg1=#{network.id},dl_dst=#{remote_hw},nw_dst=#{remote_ip}", "output:#{out_port}"

  # Routing of ARP packets to instance.
  add_flow in_port, "priority=#{2}", "table=#{@@arp_route_table},in_port=#{out_port},arp,dl_dst=#{hw},nw_dst=#{ip}", "output:#{in_port}"
end

#install_virtual_network(network) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 474

def install_virtual_network network
  network.flood_flows       << ["priority=#{1},table=#{@@virtual_dest},reg1=#{network.id},reg2=#{0},dl_dst=ff:ff:ff:ff:ff:ff", "", "output:<>", ""]
  network.flood_local_flows << ["priority=#{0},table=#{@@virtual_dest},reg1=#{network.id},dl_dst=ff:ff:ff:ff:ff:ff", "", "output:<>", ""]

  learn_arp_match = "priority=#{1},idle_timeout=#{3600*10},table=#{@@virtual_dest},reg1=#{network.id},reg2=#{0},NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[]"
  learn_arp_actions = "output:NXM_NX_REG2[]"

  @ovs_ofctl.add_flow "priority=#{2},table=#{@@virtual_src},reg1=#{network.id},reg2=#{0}", "resubmit\\(,#{@@virtual_dest}\\)"
  @ovs_ofctl.add_flow "priority=#{1},table=#{@@virtual_src},reg1=#{network.id},arp", "learn\\(#{learn_arp_match},#{learn_arp_actions}\\),resubmit\\(,#{@@virtual_dest}\\)"
  @ovs_ofctl.add_flow "priority=#{0},table=#{@@virtual_src},reg1=#{network.id}", "resubmit\\(,#{@@virtual_dest}\\)"

  # Catch ARP for the DHCP server.
  @ovs_ofctl.add_flow "priority=#{3},table=#{@@virtual_dest},reg1=#{network.id},arp,nw_dst=#{network.dhcp_ip.to_s}", "controller"

  # Catch DHCP requests.
  @ovs_ofctl.add_flow "priority=#{3},table=#{@@virtual_dest},reg1=#{network.id},udp,dl_dst=#{network.dhcp_hw},nw_dst=#{network.dhcp_ip.to_s},tp_src=68,tp_dst=67", "controller"
  @ovs_ofctl.add_flow "priority=#{3},table=#{@@virtual_dest},reg1=#{network.id},udp,dl_dst=ff:ff:ff:ff:ff:ff,nw_dst=255.255.255.255,tp_src=68,tp_dst=67", "controller"

  logger.info "installed virtual network: id:#{network.id} dhcp_hw:#{network.dhcp_hw} dhcp_ip:#{network.dhcp_ip.to_s}."
end

#install_virtual_route(network, port, hw, ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 335

def install_virtual_route network, port, hw, ip
  port.queue_flow "priority=#{7}", "table=#{0},in_port=#{port.port_info.number}", "load:#{network.id}->NXM_NX_REG1[],resubmit(,#{@@virtual_src})"
  port.queue_flow "priority=#{2}", "table=#{@@virtual_dest},reg1=#{network.id},dl_dst=#{hw}", "output:#{port.port_info.number}"
end

#install_virtual_static_d_transport(network, nw_proto, in_port, local_hw, local_ip, out_port, remote_ip, remote_port) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 418

def install_virtual_static_d_transport network, nw_proto, in_port, local_hw, local_ip, out_port, remote_ip, remote_port
  match_type = "dl_type=0x0800,nw_proto=#{nw_proto}"

  src_match = ""
  src_match << ",nw_src=#{remote_ip}" if not remote_ip =~ /\/0$/
  src_match << ",tp_src=#{remote_port}" if remote_port != 0
  dst_match = ""
  dst_match << ",nw_dst=#{remote_ip}" if not remote_ip =~ /\/0$/
  dst_match << ",tp_dst=#{remote_port}" if remote_port != 0

  incoming_match = "table=#{@@load_dest_table},#{match_type},dl_dst=#{local_hw},nw_dst=#{local_ip}#{src_match}"
  incoming_actions = "output:#{in_port}"
  add_flow in_port, "priority=#{3}", incoming_match, incoming_actions

  outgoing_match = "table=#{@@virtual_src},reg1=#{network.id},#{match_type},dl_src=#{local_hw},nw_src=#{local_ip}#{dst_match}"
  outgoing_actions = "output:#{out_port}"
  add_flow in_port, "priority=#{3}", outgoing_match, outgoing_actions
end

#packet_in(datapath_id, message) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 201

def packet_in datapath_id, message
  port = ports[message.in_port]

  if port.nil?
    logger.debug "Dropping processing of packet, unknown port."
    return
  end

  if message.arp?
    logger.debug "Got ARP packet; port:#{message.in_port} source:#{message.arp_sha.to_s}:#{message.arp_spa.to_s} dest:#{message.arp_tha.to_s}:#{message.arp_tpa.to_s}."
    return if port.network.nil?

    if message.arp_oper == Racket::L3::ARP::ARPOP_REQUEST and message.arp_tpa.to_i == port.network.dhcp_ip.to_i
      send_arp(datapath_id, message.in_port, Racket::L3::ARP::ARPOP_REPLY,
               port.network.dhcp_hw.to_s, port.network.dhcp_ip.to_s,
               message.macsa.to_s, message.arp_spa.to_s)
    end

    return
  end

  if message.ipv4? and message.tcp?
    logger.debug "Got IPv4/TCP packet; port:#{message.in_port} source:#{message.ipv4_saddr.to_s}:#{message.tcp_src_port} dest:#{message.ipv4_daddr.to_s}:#{message.tcp_dst_port}."

    # Add dynamic NAT flows for meta-data connections.
    if message.ipv4_daddr.to_s == "169.254.169.254" and message.tcp_dst_port == 80
      install_dnat_entry datapath_id, message, @@metadata_outgoing_table, @@metadata_incoming_table, OFPP_LOCAL, @local_hw, Isono::Util.default_gw_ipaddr, 9002
      send_packet_out(datapath_id, :packet_in => message, :actions => Trema::ActionOutput.new( :port => OFPP_TABLE ) )
      return
    end

  end

  if message.ipv4? and message.udp?
    logger.debug "Got IPv4/UDP packet; port:#{message.in_port} source:#{message.ipv4_saddr.to_s}:#{message.udp_src_port} dest:#{message.ipv4_daddr.to_s}:#{message.udp_dst_port}."

    return if port.network.nil?

    if message.udp_src_port == 68 and message.udp_dst_port == 67
      dhcp_in = DHCP::Message.from_udp_payload(message.udp_payload)

      logger.debug "DHCP: message:#{dhcp_in.to_s}."

      if port.network.dhcp_ip.nil?
        logger.debug "DHCP: Port has no dhcp_ip: port:#{port.inspect}"
        return
      end

      # Check incoming type...
      message_type = dhcp_in.options.select { |each| each.type == $DHCP_MESSAGETYPE }
      return if message_type.empty? or message_type[0].payload.empty?

      # Verify dhcp_in values...

      if message_type[0].payload[0] == $DHCP_MSG_DISCOVER
        logger.debug "DHCP send: DHCP_MSG_OFFER."
        dhcp_out = DHCP::Offer.new(:options => [DHCP::MessageTypeOption.new(:payload => [$DHCP_MSG_OFFER])])
      elsif message_type[0].payload[0] == $DHCP_MSG_REQUEST
        logger.debug "DHCP send: DHCP_MSG_ACK."
        dhcp_out = DHCP::ACK.new(:options => [DHCP::MessageTypeOption.new(:payload => [$DHCP_MSG_ACK])])
      else
        logger.debug "DHCP send: no handler."
        return
      end

      dhcp_out.xid = dhcp_in.xid
      dhcp_out.yiaddr = Trema::IP.new(port.ip).to_i
      # Verify instead that discover has the right mac address.
      dhcp_out.chaddr = Trema::Mac.new(port.mac).to_short
      dhcp_out.siaddr = port.network.dhcp_ip.to_i

      subnet_mask = IPAddr.new(IPAddr::IN4MASK, Socket::AF_INET).mask(port.network.prefix)

      dhcp_out.options << DHCP::ServerIdentifierOption.new(:payload => port.network.dhcp_ip.to_short)
      dhcp_out.options << DHCP::IPAddressLeaseTimeOption.new(:payload => [ 0xff, 0xff, 0xff, 0xff ])
      dhcp_out.options << DHCP::BroadcastAddressOption.new(:payload => (port.network.ipv4_network | ~subnet_mask).to_short)
      # Host name 'abcdefgh'.
      # Domain name 'foo.local'
      # Domain name server
      # dhcp_out.options << DHCP::RouterOption.new(:payload => port.network.dhcp_ip.split('.').collect { | each | each.to_i })
      dhcp_out.options << DHCP::SubnetMaskOption.new(:payload => subnet_mask.to_short)

      logger.debug "DHCP send: output:#{dhcp_out.to_s}."
      send_udp(datapath_id, message.in_port, port.network.dhcp_hw.to_s, port.network.dhcp_ip.to_s, 67, port.mac.to_s, port.ip, 68, dhcp_out.pack)
    end
  end
end

#port_status(message) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 167

def port_status message
  logger.info "port_status from %#x." % message.datapath_id
  logger.debug "datapath_id: %#x" % message.datapath_id
  logger.debug "reason: #{message.reason}"
  logger.debug "in_port: #{message.phy_port.number}"
  logger.debug "hw_addr: #{message.phy_port.hw_addr}"
  logger.debug "state: %#x" % message.phy_port.state

  case message.reason
  when OFPPR_ADD
    logger.info "Adding port: port:#{message.phy_port.number} name:#{message.phy_port.name}."
    raise "OpenFlowPort" if ports.has_key? message.phy_port.number

    delete_port ports[message.phy_port.number] if ports.has_key? message.phy_port.number

    port = OpenFlowPort.new(message.phy_port)
    port.is_active = true
    ports[message.phy_port.number] = port

    @service_openflow.add_eth port if message.phy_port.name =~ /^eth/
    @service_openflow.add_instance port if message.phy_port.name =~ /^vif-/
    @service_openflow.add_tunnel port if message.phy_port.name =~ /^gre-/

  when OFPPR_DELETE
    logger.info "Deleting instance port: port:#{message.phy_port.number}."
    raise "UnknownOpenflowPort" if not ports.has_key? message.phy_port.number

    delete_port ports[message.phy_port.number] if ports.has_key? message.phy_port.number

  when OFPPR_MODIFY
    logger.info "Ignoring port modify..."
  end
end

#send_arp(datapath_id, out_port, op_code, src_hw, src_ip, dst_hw, dst_ip) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 550

def send_arp datapath_id, out_port, op_code, src_hw, src_ip, dst_hw, dst_ip
  raw_out = Racket::Racket.new
  raw_out.l2 = Racket::L2::Ethernet.new
  raw_out.l2.ethertype = Racket::L2::Ethernet::ETHERTYPE_ARP
  raw_out.l2.src_mac = src_hw
  raw_out.l2.dst_mac = dst_hw
  
  raw_out.l3 = Racket::L3::ARP.new
  raw_out.l3.opcode = op_code
  raw_out.l3.sha = src_hw
  raw_out.l3.spa = src_ip
  raw_out.l3.tha = dst_hw
  raw_out.l3.tpa = dst_ip

  raw_out.layers.compact.each { |l|
    logger.debug "ARP packet: layer:#{l.pretty}."
  }

  send_packet_out(datapath_id, :data => raw_out.pack, :actions => Trema::ActionOutput.new( :port => out_port ) )
end

#send_udp(datapath_id, out_port, src_hw, src_ip, src_port, dst_hw, dst_ip, dst_port, payload) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 525

def send_udp datapath_id, out_port, src_hw, src_ip, src_port, dst_hw, dst_ip, dst_port, payload
  raw_out = Racket::Racket.new
  raw_out.l2 = Racket::L2::Ethernet.new
  raw_out.l2.src_mac = src_hw
  raw_out.l2.dst_mac = dst_hw
  
  raw_out.l3 = Racket::L3::IPv4.new
  raw_out.l3.src_ip = src_ip
  raw_out.l3.dst_ip = dst_ip
  raw_out.l3.protocol = 0x11

  raw_out.l4 = Racket::L4::UDP.new
  raw_out.l4.src_port = src_port
  raw_out.l4.dst_port = dst_port
  raw_out.l4.payload = payload

  raw_out.l4.fix!(raw_out.l3.src_ip, raw_out.l3.dst_ip)

  raw_out.layers.compact.each { |l|
    logger.debug "send udp: layer:#{l.pretty}."
  }

  send_packet_out(datapath_id, :data => raw_out.pack, :actions => Trema::ActionOutput.new( :port => out_port ) )
end

#start ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 46

def start
  logger.info "starting OpenFlow controller."
end

#switch_ready(datapath_id) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 50

def switch_ready datapath_id
  logger.info "switch_ready from %#x." % datapath_id
  ports.clear

  # There's a short period of time between the switch being
  # activated and features_reply installing flow.
  send_message datapath_id, Trema::FeaturesRequest.new
end

#update_network(network) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 521

def update_network network
  @ovs_ofctl.add_flows_from_list network.generate_flood_flows
end

#vendor(message) ⇒ Object 



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# File 'lib/dcmgr/node_modules/openflow_controller.rb', line 289

def vendor message
  logger.debug "vendor message from #{message.datapath_id.to_hex}."
  logger.debug "transaction_id: #{message.transaction_id.to_hex}"
  logger.debug "data: #{message.buffer.unpack('H*')}"
end