Class: Dcmgr::NodeModules::ServiceNetfilter

Inherits:
Isono::NodeModules::Base
  • Object
show all
Includes:
Helpers::NicHelper, Logger, Bandwidth, Nat
Defined in:
lib/dcmgr/node_modules/service_netfilter.rb

Instance Method Summary collapse

Methods included from Bandwidth

#clear_bandwidth_limits, #limit_bandwidth

Methods included from Logger

create, default_logdev, included

Methods included from Helpers::NicHelper

#find_nic, #nic_state, #valid_nic?

Methods included from Nat

#arp_respond, #is_natted_ip?, #nat_exceptions, #nat_instance

Instance Method Details

#build_ebtables_basic_part(vif_map, inst_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 383

def build_ebtables_basic_part(vif_map, inst_map)
  basic_cmds = []
  hva_ipv4 = Isono::Util.default_gw_ipaddr

  ################################
  ## 0. chain name
  ################################

  # support IP protocol
  protocol_map = protocol_map(:ebtables)

  # make chain names.
  chains = []
  chains << "s_#{vif_map[:uuid]}"
  chains << "d_#{vif_map[:uuid]}"
  chains << "s_#{vif_map[:uuid]}_d_hst"
  chains << "d_#{vif_map[:uuid]}_s_hst"
  protocol_map.each { |k,v|
    chains << "s_#{vif_map[:uuid]}_#{k}"
    chains << "d_#{vif_map[:uuid]}_#{k}"
    chains << "s_#{vif_map[:uuid]}_d_hst_#{k}"
    chains << "d_#{vif_map[:uuid]}_s_hst_#{k}"
  }

  ################################
  ## 1. basic part
  ################################

  # create user defined chains.
  [ 'N' ].each { |xcmd|
    chains.each { |chain|
      basic_cmds << "ebtables -#{xcmd} #{chain}"
    }
  }

  # jumt to user defined chains
  basic_cmds << "ebtables -A FORWARD -i #{vif_map[:uuid]} -j s_#{vif_map[:uuid]}"
  basic_cmds << "ebtables -A FORWARD -o #{vif_map[:uuid]} -j d_#{vif_map[:uuid]}"
  basic_cmds << "ebtables -A INPUT   -i #{vif_map[:uuid]} -j s_#{vif_map[:uuid]}_d_hst"
  basic_cmds << "ebtables -A OUTPUT  -o #{vif_map[:uuid]} -j d_#{vif_map[:uuid]}_s_hst"

  # IP protocol routing
  protocol_map.each { |k,v|
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}       -p #{v} -j s_#{vif_map[:uuid]}_#{k}"
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}       -p #{v} -j d_#{vif_map[:uuid]}_#{k}"
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst -p #{v} -j s_#{vif_map[:uuid]}_d_hst_#{k}"
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst -p #{v} -j d_#{vif_map[:uuid]}_s_hst_#{k}"
  }

  if @node.manifest.config.packet_drop_log
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}       --log-level 4 --log-ip --log-arp --log-prefix 'D s_#{vif_map[:uuid]}:'       -j CONTINUE"
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst --log-level 4 --log-ip --log-arp --log-prefix 'D s_#{vif_map[:uuid]}_d_hst:' -j CONTINUE"
  end
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}       -j DROP"
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst -j DROP"
  # anti spoof: mac    # guest -> *
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_arp       --protocol arp --arp-mac-src ! #{vif_map[:mac]} --log-ip --log-arp --log-prefix 'Dmc s_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-mac-src ! #{vif_map[:mac]} --log-ip --log-arp --log-prefix 'Dmc s_#{vif_map[:uuid]}_d_hst_arp:' -j CONTINUE"
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_arp       --protocol arp --arp-mac-src ! #{vif_map[:mac]} -j DROP"
  basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-mac-src ! #{vif_map[:mac]} -j DROP"
  # guest <- * (broadcast)
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp                          --arp-mac-dst 00:00:00:00:00:00 --log-ip --log-arp --log-prefix 'Amc d_#{vif_map[:uuid]}_arp:'     -j CONTINUE"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-ip-src=#{hva_ipv4} --arp-mac-dst 00:00:00:00:00:00 --log-ip --log-arp --log-prefix 'Amc d_#{vif_map[:uuid]}_hst_arp:' -j CONTINUE"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp                          --arp-mac-dst 00:00:00:00:00:00 -j ACCEPT"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-ip-src=#{hva_ipv4} --arp-mac-dst 00:00:00:00:00:00 -j ACCEPT"

  # guest <- *
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-mac-dst ! #{vif_map[:mac]} --log-ip --log-arp --log-prefix 'Dmc d_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-mac-dst ! #{vif_map[:mac]} --log-ip --log-arp --log-prefix 'Dmc d_#{vif_map[:uuid]}_s_hst_arp:' -j CONTINUE"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-mac-dst ! #{vif_map[:mac]} -j DROP"
  basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-mac-dst ! #{vif_map[:mac]} -j DROP"

  # anti spoof: ipv4
  inst_map[:ips].each { |ipv4|
    #next if is_natted_ip? ipv4
    # guest -> *
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-src ! #{ipv4} --log-ip --log-arp --log-prefix 'Dip s_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src ! #{ipv4} --log-ip --log-arp --log-prefix 'Dip s_#{vif_map[:uuid]}_d_hst_arp:' -j CONTINUE"
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-src ! #{ipv4} -j DROP"
    basic_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src ! #{ipv4} -j DROP"
    # guest <- *
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-dst ! #{ipv4} --log-ip --log-arp --log-prefix 'Dip d_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-ip-dst ! #{ipv4} --log-ip --log-arp --log-prefix 'Dip d_#{vif_map[:uuid]}_s_hst_arp:' -j CONTINUE"
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-dst ! #{ipv4} -j DROP"
    basic_cmds << "ebtables -A d_#{vif_map[:uuid]}_s_hst_arp --protocol arp --arp-ip-dst ! #{ipv4} -j DROP"
  }

  basic_cmds
end

#build_ebtables_final_part(vif_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 549

def build_ebtables_final_part(vif_map)
  final_cmds = []

  ################################
  ## 3. final part
  ################################
  # deny,allow
  final_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --log-level 4 --log-ip --log-arp --log-prefix 'D d_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
  final_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --log-level 4 --log-ip --log-arp --log-prefix 'D s_#{vif_map[:uuid]}_d_hst_arp:' -j CONTINUE"
  final_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       -j DROP"
  final_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp -j DROP"

  final_cmds
end

#build_ebtables_group_part(vif_map, inst_map, viftable_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 473

def build_ebtables_group_part(vif_map, inst_map, viftable_map)
  group_cmds = []
  hva_ipv4 = Isono::Util.default_gw_ipaddr

  ################################
  ## 2. group part
  ################################
  same_subnet_ipv4s = rpc.request('hva-collector', 'get_group_instance_ipv4s', inst_map[:uuid])

  network_map = rpc.request('hva-collector', 'get_network', inst_map[:instance_nics].first[:network_id])
  raise "UnknownNetworkId" if network_map.nil?
  joined_network = IPAddress("#{network_map[:ipv4_gw]}/#{network_map[:prefix]}")
  
  [ network_map[:dns_server], network_map[:dhcp_server] ].each { |ipv4|
    next unless joined_network.include? IPAddress(ipv4)      
    same_subnet_ipv4s << ipv4
  }       

  # network resource node(s)
  ng_maps = rpc.request('hva-collector', 'get_netfilter_groups_of_instance', inst_map[:uuid])
  rules = ng_maps.map { |ng_map|
    ng_map[:rules].map { |rule| rule[:permission] }
  }.flatten
  build_rule(rules).each do |rule|
    begin
      # <ArgumentError: Invalid IP "0.0.0.0">
      next unless joined_network.include? IPAddress(rule[:ip_source])
      same_subnet_ipv4s << rule[:ip_source]
    rescue Exception => e
      p e
    end
  end
  same_subnet_ipv4s << network_map[:ipv4_gw]

  # guest node(s) in HyperVisor.
  alive_inst_maps = rpc.request('hva-collector', 'get_alive_instances', node.node_id)
  guest_ipv4s = alive_inst_maps.map { |alive_inst_map|
    alive_inst_map[:ips]
  }.flatten.uniq.compact

  same_subnet_ipv4s.uniq.reverse_each do |ipv4|
    next if vif_map[:ipv4] == ipv4

    # get_macaddr_by_ipv4, ipv4
    if ipv4 == hva_ipv4
      #p "#{vif_map[:uuid]}(#{vif_map[:ipv4]}) -> [host] ***-****** (#{ipv4})"
      group_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} --log-ip --log-arp --log-prefix 'Afw s_#{vif_map[:uuid]}_d_hst_arp:' -j CONTINUE"
      group_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} -j ACCEPT"
    elsif guest_ipv4s.include?(ipv4)
      #p "#{vif_map[:uuid]}(#{vif_map[:ipv4]}) -> [guest] #{viftable_map[ipv4]}(#{ipv4})"

      # guest->guest
      group_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} --log-ip --log-arp --log-prefix 'Afw d_#{vif_map[:uuid]}_arp:'       -j CONTINUE"
      group_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp       --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} -j ACCEPT"
      # guest->host
      group_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} --log-ip --log-arp --log-prefix 'Afw s_#{vif_map[:uuid]}_d_hst_arp:' -j CONTINUE"
      group_cmds << "ebtables -A s_#{vif_map[:uuid]}_d_hst_arp --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} -j ACCEPT"
      
      unless viftable_map[ipv4].nil?
        # guest->guest
        group_cmds << "ebtables -A d_#{viftable_map[ipv4]}_arp       --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} --log-ip --log-arp --log-prefix 'Arv d_#{viftable_map[ipv4]}_arp:' -j CONTINUE"
        group_cmds << "ebtables -A d_#{viftable_map[ipv4]}_arp       --protocol arp --arp-ip-src #{vif_map[:ipv4]} --arp-ip-dst #{ipv4} -j ACCEPT"

        # guest->host
        group_cmds << "ebtables -A s_#{viftable_map[ipv4]}_d_hst_arp --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} --log-ip --log-arp --log-prefix 'Arv s_#{viftable_map[ipv4]}_d_hst_arp:' -j CONTINUE"
        group_cmds << "ebtables -A s_#{viftable_map[ipv4]}_d_hst_arp --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} -j ACCEPT"
      end
    else
      #p "#{vif_map[:uuid]}(#{vif_map[:ipv4]}) -> [other] ***-******** (#{ipv4})"
      group_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} --log-ip --log-arp --log-prefix 'Afw :d_#{vif_map[:uuid]}_arp' -j CONTINUE"
      group_cmds << "ebtables -A d_#{vif_map[:uuid]}_arp --protocol arp --arp-ip-src #{ipv4} --arp-ip-dst #{vif_map[:ipv4]} -j ACCEPT"
    end
  end

  group_cmds
end

#build_iptables_basic_part(vif_map, inst_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 564

def build_iptables_basic_part(vif_map, inst_map)
  basic_cmds = []

  network_map = rpc.request('hva-collector', 'get_network', inst_map[:instance_nics].first[:network_id])
  raise "UnknownNetworkId" if network_map.nil?

  ################################
  ## 0. chain name
  ################################

  # support IP protocol
  protocol_map = protocol_map(:iptables)

  # make chain names.
  chains = []
  protocol_map.each { |k,v|
    chains << "s_#{vif_map[:uuid]}_#{k}"
    chains << "d_#{vif_map[:uuid]}_#{k}"
  }
  chains << "s_#{vif_map[:uuid]}"
  chains << "d_#{vif_map[:uuid]}"

  ################################
  ## 1. basic part
  ################################

  # metadata-server
  port = network_map[:metadata_server_port] || 80
  [ 'A' ].each { |xcmd|
    basic_cmds << "iptables -t nat -#{xcmd} PREROUTING -m physdev --physdev-in #{vif_map[:uuid]} -d 169.254.169.254 -p tcp --dport 80 -j DNAT --to-destination #{network_map[:metadata_server]}:#{port}"
  }
  # create user defined chains.
  [ 'N' ].each { |xcmd|
    chains.each { |chain|
      basic_cmds << "iptables -#{xcmd} #{chain}"

      # logger & drop
      basic_cmds << "iptables -N #{chain}_drop"
      if @node.manifest.config.packet_drop_log
        basic_cmds << "iptables -A #{chain}_drop -j LOG --log-level 4 --log-prefix 'D #{chain}:'"
      end
      basic_cmds << "iptables -A #{chain}_drop -j DROP"
    }
  }

  # DHCP Server
  basic_cmds << "iptables -A d_#{vif_map[:uuid]}_udp -p udp ! -s #{network_map[:dhcp_server]} --sport 67 -j d_#{vif_map[:uuid]}_udp_drop"
  basic_cmds << "iptables -A d_#{vif_map[:uuid]}_udp -p udp ! -s #{network_map[:dhcp_server]} --sport 68 -j d_#{vif_map[:uuid]}_udp_drop"

  # group nodes
  # group node IPv4 addresses.
  ipv4s = rpc.request('hva-collector', 'get_group_instance_ipv4s', inst_map[:uuid])
  ipv4s << network_map[:ipv4_gw]
  ipv4s.uniq.reverse_each { |addr|
    basic_cmds << "iptables -A d_#{vif_map[:uuid]} -s #{addr} -j ACCEPT"
  }

  # IP protocol routing
  [ 's', 'd' ].each do |bound|
    protocol_map.each { |k,v|
      basic_cmds << "iptables -N #{bound}_#{vif_map[:uuid]}_#{k}"

      case k
      when 'tcp'
        case bound
        when 's'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state NEW,ESTABLISHED -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        when 'd'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state RELATED,ESTABLISHED -p #{k} -j ACCEPT"
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        end
      when 'udp'
        case bound
        when 's'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state NEW,ESTABLISHED -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        when 'd'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state ESTABLISHED -p #{k} -j ACCEPT"
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        end
      when 'icmp'
        case bound
        when 's'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state NEW,ESTABLISHED,RELATED -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        when 'd'
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -m state --state ESTABLISHED,RELATED -p #{k} -j ACCEPT"
          basic_cmds << "iptables -A #{bound}_#{vif_map[:uuid]} -p #{k} -j #{bound}_#{vif_map[:uuid]}_#{k}"
        end
      end
    }
  end

  basic_cmds << "iptables -A FORWARD -m physdev --physdev-is-bridged --physdev-in  #{vif_map[:uuid]} -j s_#{vif_map[:uuid]}"
  basic_cmds << "iptables -A FORWARD -m physdev --physdev-is-bridged --physdev-out #{vif_map[:uuid]} -j d_#{vif_map[:uuid]}"

  ##
  ## ACCEPT
  ##
  # DHCP Server
  basic_cmds << "iptables -A d_#{vif_map[:uuid]}_udp -p udp -s #{network_map[:dhcp_server]} --sport 67 -j ACCEPT"
  basic_cmds << "iptables -A d_#{vif_map[:uuid]}_udp -p udp -s #{network_map[:dhcp_server]} --sport 68 -j ACCEPT"

  # DNS Server
  basic_cmds << "iptables -A s_#{vif_map[:uuid]}_udp -p udp -d #{network_map[:dns_server]} --dport 53 -j ACCEPT"

  ##
  ## DROP
  ##
  protocol_map.each { |k,v|
    # DHCP
    basic_cmds << "iptables -A s_#{vif_map[:uuid]} -d #{network_map[:dhcp_server]} -p #{k} -j s_#{vif_map[:uuid]}_#{k}_drop"
    # DNS
    basic_cmds << "iptables -A s_#{vif_map[:uuid]} -d #{network_map[:dns_server]} -p #{k} -j s_#{vif_map[:uuid]}_#{k}_drop"
  }

  basic_cmds
end

#build_iptables_final_part(vif_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 718

def build_iptables_final_part(vif_map)
  final_cmds = []

  # support IP protocol
  protocol_map = protocol_map(:iptables)

  ################################
  ## 3. final part
  ################################

  # drop other routings
  protocol_map.each { |k,v|
    final_cmds << "iptables -A d_#{vif_map[:uuid]}_#{k} -p #{k} -j d_#{vif_map[:uuid]}_#{k}_drop"
  }

  # IP protocol routing
  [ 'd' ].each do |bound|
    protocol_map.each { |k,v|
      final_cmds << "iptables -A #{bound}_#{vif_map[:uuid]}_#{k} -j #{bound}_#{vif_map[:uuid]}_#{k}_drop"
    }
  end

  final_cmds
end

#build_iptables_group_part(vif_map, inst_map) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 681

def build_iptables_group_part(vif_map, inst_map)
  group_cmds = []

  ################################
  ## 2. group part
  ################################
  ng_maps = rpc.request('hva-collector', 'get_netfilter_groups_of_instance', inst_map[:uuid])
  rules = ng_maps.map { |ng_map|
    ng_map[:rules].map { |rule| rule[:permission] }
  }.flatten

  # security group
  build_rule(rules).each do |rule|
    case rule[:ip_protocol]
    when 'tcp', 'udp'
      if rule[:ip_fport] == rule[:ip_tport]
        group_cmds << "iptables -A d_#{vif_map[:uuid]}_#{rule[:ip_protocol]} -p #{rule[:ip_protocol]} -s #{rule[:ip_source]} --dport #{rule[:ip_fport]} -j ACCEPT"
      else
        group_cmds << "iptables -A d_#{vif_map[:uuid]}_#{rule[:ip_protocol]} -p #{rule[:ip_protocol]} -s #{rule[:ip_source]} --dport #{rule[:ip_fport]}:#{rule[:ip_tport]} -j ACCEPT"
      end
    when 'icmp'
      # icmp
      #   This extension can be used if `--protocol icmp' is specified. It provides the following option:
      #   [!] --icmp-type {type[/code]|typename}
      #     This allows specification of the ICMP type, which can be a numeric ICMP type, type/code pair, or one of the ICMP type names shown by the command
      #      iptables -p icmp -h
      if rule[:icmp_type] == -1 && rule[:icmp_code] == -1
        group_cmds << "iptables -A d_#{vif_map[:uuid]}_#{rule[:ip_protocol]} -p #{rule[:ip_protocol]} -s #{rule[:ip_source]} -j ACCEPT"
      else
        group_cmds << "iptables -A d_#{vif_map[:uuid]}_#{rule[:ip_protocol]} -p #{rule[:ip_protocol]} -s #{rule[:ip_source]} --icmp-type #{rule[:icmp_type]}/#{rule[:icmp_code]} -j ACCEPT"
      end
    end
  end

  group_cmds
end

#build_rule(rules = []) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 743

def build_rule(rules = [])
  rule_maps = []

  rules.each do |rule|
    rule = rule.strip.gsub(/[\s\t]+/, '')
    from_group = false
    ipv4s = []

    # ex.
    # "tcp:22,22,ip4:0.0.0.0"
    # "udp:53,53,ip4:0.0.0.0"
    # "icmp:-1,-1,ip4:0.0.0.0"

    # 1st phase
    # ip_tport    : tcp,udp? 1 - 16bit, icmp: -1
    # id_port has been separeted in first phase.
    from_pair, ip_tport, source_pair = rule.split(',')

    next if from_pair.nil?
    next if ip_tport.nil?
    next if source_pair.nil?

    # 2nd phase
    # ip_protocol : [ tcp | udp | icmp ]
    # ip_fport    : tcp,udp? 1 - 16bit, icmp: -1
    ip_protocol, ip_fport = from_pair.split(':')

    # protocol    : [ ip4 | ip6 | #{account_id} ]
    # ip_source   : ip4? xxx.xxx.xxx.xxx./[0-32], ip6? (not yet supprted), #{netfilter_group_id}
    protocol, ip_source = source_pair.split(':')

    begin
      s = StringScanner.new(protocol)
      until s.eos?
        case
        when s.scan(/ip6/)
          # TODO#FUTURE: support IPv6 address format
          next
        when s.scan(/ip4/)
          # IPAddress doesn't support prefix '0'.
          ip_addr, prefix = ip_source.split('/', 2)
          if prefix.to_i == 0
            ip_source = ip_addr
          end
        when s.scan(/a-\w{8}/)
          from_group = true
          inst_maps = rpc.request('hva-collector', 'get_instances_of_account_netfilter_group', protocol, ip_source)
          inst_maps.each { |inst_map|
            ipv4s << inst_map[:ips]
          }
        else
          raise "unexpected protocol '#{s.peep(20)}'"
        end
      end
    rescue Exception => e
      p e
      next
    end

    begin
      if from_group == false
        #p "from_group:(#{from_group}) ip_source -> #{ip_source}"
        ip = IPAddress(ip_source)
        ip_source = case ip.u32
                    when 0
                      "#{ip.address}/0"
                    else
                      "#{ip.address}/#{ip.prefix}"
                    end
      else
        ipv4s = ipv4s.flatten.uniq
      end
    rescue Exception => e
      p e
      next
    end

    case ip_protocol
    when 'tcp', 'udp'
      ip_fport = ip_fport.to_i
      ip_tport = ip_tport.to_i

      # validate port range
      [ ip_fport, ip_tport ].each do |port|
        next unless port >= 1 && port <= 65535
      end

      if ip_fport <= ip_tport
        if from_group == false
          rule_maps << {
            :ip_protocol => ip_protocol,
            :ip_fport    => ip_fport,
            :ip_tport    => ip_tport,
            :protocol    => protocol,
            :ip_source   => ip_source,
          }
        else
          ipv4s.each { |ip|
            rule_maps << {
              :ip_protocol => ip_protocol,
              :ip_fport    => ip_fport,
              :ip_tport    => ip_tport,
              :protocol    => 'ip4',
              :ip_source   => ip,
            }
          }
        end
      end
    when 'icmp'
      # via http://docs.amazonwebservices.com/AWSEC2/latest/CommandLineReference/
      #
      # For the ICMP protocol, the ICMP type and code must be specified.
      # This must be specified in the format type:code where both are integers.
      # Type, code, or both can be specified as -1, which is a wildcard.

      icmp_type = ip_fport.to_i
      icmp_code = ip_tport.to_i

      # icmp_type
      case icmp_type
      when -1
      when 0, 3, 5, 8, 11, 12, 13, 14, 15, 16, 17, 18
      else
        next
      end

      # icmp_code
      case icmp_code
      when -1
      when 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
        # when icmp_type equals -1 icmp_code must equal -1.
        next if icmp_type == -1
      else
        next
      end

      if from_group == false
        rule_maps << {
          :ip_protocol => ip_protocol,
          :icmp_type   => ip_tport.to_i, # ip_tport.to_i, # -1 or 0,       3,    5,       8,        11, 12, 13, 14, 15, 16, 17, 18
          :icmp_code   => ip_fport.to_i, # ip_fport.to_i, # -1 or 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
          :protocol    => protocol,
          :ip_source   => ip_source,
        }
      else
        ipv4s.each { |ip|
          rule_maps << {
            :ip_protocol => ip_protocol,
            :icmp_type   => ip_tport.to_i, # ip_tport.to_i, # -1 or 0,       3,    5,       8,        11, 12, 13, 14, 15, 16, 17, 18
            :icmp_code   => ip_fport.to_i, # ip_fport.to_i, # -1 or 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
            :protocol    => 'ip4',
            :ip_source   => ip,
          }
        }
      end
    end
  end

  rule_maps
end

#build_vif_map(inst_map = {}) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 259

def build_vif_map(inst_map = {})
  vif_map = {
    :uuid  => inst_map[:instance_nics].first[:uuid],
    :mac   => inst_map[:instance_nics].first[:mac_addr].unpack('A2'*6).join(':'),
    :ipv4  => inst_map[:ips].first,
  }
end

#do_exec(cmds) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 285

def do_exec(cmds)
  recmds = []

  eos = "__EOS_#{Isono::Util.gen_id}___"
  recmds << "/bin/cat <<'#{eos}' | /bin/bash"
  cmds.flatten.uniq.each { |cmd|
    puts cmd if @node.manifest.config.verbose_netfilter == true
    recmds << cmd
  }
  recmds << "#{eos}"

  logger.debug("applying rule line(s): #{recmds.size - 2}")
  system(recmds.join("\n"))
  logger.debug("applied rule line(s): #{recmds.size - 2}")
end

#event ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 908

def event
  @event ||= Isono::NodeModules::EventChannel.new(@node)
end

#init_bandwidth_limit(network_maps) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 379

def init_bandwidth_limit(network_maps)
  do_exec([clear_bandwidth_limits,limit_bandwidth(network_maps)])
end

#init_ebtables(inst_maps = [], viftable_map = {}) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 301

def init_ebtables(inst_maps = [], viftable_map = {})
  init_cmds  = []
  basic_cmds = []
  group_cmds = []
  nat_cmds   = []
  final_cmds = []

  init_cmds << "ebtables --init-table"
  #Clear the nat table. This table is only used in build_ebtables_nat_part
  init_cmds << "ebtables -t nat --init-table"

  inst_maps.each { |inst_map|
    vif_map = build_vif_map(inst_map)

    basic_cmds << build_ebtables_basic_part(vif_map, inst_map)            
    group_cmds << build_ebtables_group_part(vif_map, inst_map, viftable_map)
    final_cmds << build_ebtables_final_part(vif_map)
  }

  viftable_map.each { |k,v|
    logger.debug("viftable: #{v} <=> #{k}")
  }

  do_exec([init_cmds, basic_cmds, group_cmds, final_cmds])
end

#init_iptables(inst_maps = []) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 327

def init_iptables(inst_maps = [])
  init_cmds  = []
  basic_cmds = []
  group_cmds = []
  nat_cmds   = []
  final_cmds = []

  [ 'raw', 'nat', 'filter' ].each { |table|
    [ 'F', 'Z', 'X' ].each { |xcmd|
      init_cmds << "iptables -t #{table} -#{xcmd}"
    }
  }
  
  #TODO: Make an option in the config file to use ipset
  use_ipset = true
  if use_ipset
    ['F','X'].each { |xcmd|
      init_cmds << "ipset -#{xcmd}"
    }
  end

  # via http://backreference.org/2010/06/11/iptables-debugging/
  # To debug ipv4 packets.
  # $ sudo tail -F /var/log/kern.log | grep TRACE:
  if @node.manifest.config.debug_iptables
    init_cmds << "iptables -t raw -A OUTPUT -p icmp -j TRACE"
    init_cmds << "iptables -t raw -A PREROUTING -p icmp -j TRACE"
  end

  inst_maps.each { |inst_map|
    vif_map = build_vif_map(inst_map)

    basic_cmds << build_iptables_basic_part(vif_map, inst_map)
    group_cmds << build_iptables_group_part(vif_map, inst_map)
    final_cmds << build_iptables_final_part(vif_map)
  }

  do_exec([init_cmds, basic_cmds, group_cmds, final_cmds])
end

#init_netfilter ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 190

def init_netfilter
  begin
    inst_maps = rpc.request('hva-collector', 'get_alive_instances', node.node_id)

    viftable_map = {}
    inst_maps = inst_maps.map { |inst_map|
      viftable_map[ inst_map[:ips].first ] = inst_map[:instance_nics].first[:uuid]

      # Does the hva have instance?
      unless inst_map[:host_pool][:node_id] == node.node_id
        logger.warn("no match for the instance: #{inst_map[:uuid]}")
        next
      end
      # Does host have vif?
      next unless valid_nic?(inst_map[:instance_nics].first[:uuid])
      inst_maps
    }.flatten.uniq.compact

    init_iptables(inst_maps) if @node.manifest.config.enable_iptables
    init_ebtables(inst_maps, viftable_map) if @node.manifest.config.enable_ebtables
    init_static_nat(inst_maps) if @node.manifest.config.enable_iptables && @node.manifest.config.enable_ebtables
    init_bandwidth_limit(networks = rpc.request('hva-collector', 'get_networks')) if @node.manifest.config.enable_iptables
    sleep 1

    logger.info("initialized netfilter")
  rescue Exception => e
    p e
  end
end

#init_static_nat(inst_maps = []) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 367

def init_static_nat(inst_maps = [])
  accept_cmds = []
  nat_cmds    = []
  
  inst_maps.each { |inst_map|
    accept_cmds << nat_exceptions(inst_map) unless @node.manifest.config.use_ipset
    nat_cmds    << nat_instance(inst_map)
  }
  
  do_exec([accept_cmds,nat_cmds])
end

#protocol_map(type) ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 267

def protocol_map(type)
  case type
  when :iptables
    {
      'tcp'  => 'tcp',
      'udp'  => 'udp',
      'icmp' => 'icmp',
    }
  when :ebtables
    {
      'ip4'  => 'ip4',
      'arp'  => 'arp',
      #'ip6'  => 'ip6',
      #'rarp' => '0x8035',
    }
  end
end

#refresh_netfilter_by_friend_instance_id(inst_id) ⇒ Object

from event_subscriber



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 221

def refresh_netfilter_by_friend_instance_id(inst_id)
  raise "UnknownInstanceID" if inst_id.nil?

  begin
    ng_maps = rpc.request('hva-collector', 'get_netfilter_groups_of_instance', inst_id)
    # get friend instance(s)
    friend_inst_maps = ng_maps.map { |ng_map|
      rpc.request('hva-collector', 'get_instances_of_netfilter_group', ng_map[:id])
    }.flatten.uniq
    guest_inst_maps = rpc.request('hva-collector', 'get_alive_instances', node.node_id)

    uuids = friend_inst_maps.map { |inst_map| inst_map[:uuid] } & guest_inst_maps.map  { |inst_map| inst_map[:uuid] }
    logger.info("my guest instance(s)?: #{uuids.inspect}")

    if uuids.flatten.uniq.size > 0
      init_netfilter
    else
      # group_instance: 1->0
      inst_map = rpc.request('hva-collector', 'get_instance', inst_id)
      init_netfilter if inst_map[:host_pool][:node_id] == node.node_id
    end
  rescue Exception => e
    p e
  end
end

#refresh_netfilter_by_joined_netfilter_group_id(netfilter_group_id) ⇒ Object

from event_subscriber



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 248

def refresh_netfilter_by_joined_netfilter_group_id(netfilter_group_id)
  raise "UnknownNetfilterGroupID" if netfilter_group_id.nil?

  begin
    inst_maps = rpc.request('hva-collector', 'get_instances_of_netfilter_group', netfilter_group_id)
    init_netfilter if inst_maps.size > 0
  rescue Exception => e
    p e
  end
end

#rpc ⇒ Object 



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# File 'lib/dcmgr/node_modules/service_netfilter.rb', line 904

def rpc
  @rpc ||= Isono::NodeModules::RpcChannel.new(@node)
end