405 lines
15 KiB
Ruby
405 lines
15 KiB
Ruby
require "set"
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require "log4r"
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require "vagrant/util/network_ip"
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module VagrantPlugins
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module ProviderVirtualBox
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module Action
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class Network
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# Utilities to deal with network addresses
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include Vagrant::Util::NetworkIP
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def initialize(app, env)
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@logger = Log4r::Logger.new("vagrant::action::vm::network")
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@app = app
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end
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def call(env)
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@env = env
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# First we have to get the array of adapters that we need
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# to create on the virtual machine itself, as well as the
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# driver-agnostic network configurations for each.
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@logger.debug("Determining adapters and networks...")
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adapters = []
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networks = []
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env[:machine].config.vm.networks.each do |type, args|
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# Get the normalized configuration we'll use around
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config = send("#{type}_config", args)
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# Get the virtualbox adapter configuration
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adapter = send("#{type}_adapter", config)
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adapters << adapter
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# Get the network configuration
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network = send("#{type}_network_config", config)
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network[:_auto_config] = true if config[:auto_config]
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networks << network
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end
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if !adapters.empty?
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# Automatically assign an adapter number to any adapters
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# that aren't explicitly set.
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@logger.debug("Assigning adapter locations...")
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assign_adapter_locations(adapters)
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# Verify that our adapters are good just prior to enabling them.
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verify_adapters(adapters)
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# Create all the network interfaces
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@logger.info("Enabling adapters...")
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env[:ui].info I18n.t("vagrant.actions.vm.network.preparing")
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env[:machine].provider.driver.enable_adapters(adapters)
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end
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# Continue the middleware chain. We're done with our VM
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# setup until after it is booted.
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@app.call(env)
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if !adapters.empty? && !networks.empty?
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# Determine the interface numbers for the guest.
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assign_interface_numbers(networks, adapters)
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# Configure all the network interfaces on the guest. We only
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# want to configure the networks that have `auto_config` setup.
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networks_to_configure = networks.select { |n| n[:_auto_config] }
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env[:ui].info I18n.t("vagrant.actions.vm.network.configuring")
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env[:machine].guest.configure_networks(networks_to_configure)
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end
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end
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# This method assigns the adapter to use for the adapter.
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# e.g. it says that the first adapter is actually on the
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# virtual machine's 2nd adapter location.
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#
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# It determines the adapter numbers by simply finding the
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# "next available" in each case.
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#
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# The adapters are modified in place by adding an ":adapter"
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# field to each.
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def assign_adapter_locations(adapters)
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available = Set.new(1..8)
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# Determine which NICs are actually available.
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interfaces = @env[:machine].provider.driver.read_network_interfaces
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interfaces.each do |number, nic|
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# Remove the number from the available NICs if the
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# NIC is in use.
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available.delete(number) if nic[:type] != :none
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end
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# Based on the available set, assign in order to
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# the adapters.
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available = available.to_a.sort
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@logger.debug("Available NICs: #{available.inspect}")
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adapters.each do |adapter|
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# Ignore the adapters that already have been assigned
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if !adapter[:adapter]
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# If we have no available adapters, then that is an exceptional
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# event.
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raise Vagrant::Errors::NetworkNoAdapters if available.empty?
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# Otherwise, assign as the adapter the next available item
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adapter[:adapter] = available.shift
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end
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end
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end
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# Verifies that the adapter configurations look good. This will
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# raise an exception in the case that any errors occur.
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def verify_adapters(adapters)
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# Verify that there are no collisions in the adapters being used.
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used = Set.new
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adapters.each do |adapter|
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raise Vagrant::Errors::NetworkAdapterCollision if used.include?(adapter[:adapter])
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used.add(adapter[:adapter])
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end
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end
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# Assigns the actual interface number of a network based on the
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# enabled NICs on the virtual machine.
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#
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# This interface number is used by the guest to configure the
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# NIC on the guest VM.
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#
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# The networks are modified in place by adding an ":interface"
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# field to each.
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def assign_interface_numbers(networks, adapters)
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current = 0
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adapter_to_interface = {}
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# Make a first pass to assign interface numbers by adapter location
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vm_adapters = @env[:machine].provider.driver.read_network_interfaces
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vm_adapters.sort.each do |number, adapter|
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if adapter[:type] != :none
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# Not used, so assign the interface number and increment
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adapter_to_interface[number] = current
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current += 1
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end
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end
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# Make a pass through the adapters to assign the :interface
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# key to each network configuration.
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adapters.each_index do |i|
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adapter = adapters[i]
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network = networks[i]
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# Figure out the interface number by simple lookup
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network[:interface] = adapter_to_interface[adapter[:adapter]]
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end
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end
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def hostonly_config(args)
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ip = args[0]
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options = args[1] || {}
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# Determine if we're dealing with a static IP or a DHCP-served IP.
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type = ip == :dhcp ? :dhcp : :static
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# Default IP is in the 20-bit private network block for DHCP based networks
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ip = "172.28.128.1" if type == :dhcp
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options = {
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:type => type,
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:ip => ip,
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:netmask => "255.255.255.0",
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:adapter => nil,
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:mac => nil,
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:name => nil,
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:auto_config => true
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}.merge(options)
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# Verify that this hostonly network wouldn't conflict with any
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# bridged interfaces
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verify_no_bridge_collision(options)
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# Get the network address and IP parts which are used for many
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# default calculations
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netaddr = network_address(options[:ip], options[:netmask])
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ip_parts = netaddr.split(".").map { |i| i.to_i }
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# Calculate the adapter IP, which we assume is the IP ".1" at the
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# end usually.
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adapter_ip = ip_parts.dup
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adapter_ip[3] += 1
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options[:adapter_ip] ||= adapter_ip.join(".")
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if type == :dhcp
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# Calculate the DHCP server IP, which is the network address
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# with the final octet + 2. So "172.28.0.0" turns into "172.28.0.2"
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dhcp_ip = ip_parts.dup
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dhcp_ip[3] += 2
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options[:dhcp_ip] ||= dhcp_ip.join(".")
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# Calculate the lower and upper bound for the DHCP server
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dhcp_lower = ip_parts.dup
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dhcp_lower[3] += 3
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options[:dhcp_lower] ||= dhcp_lower.join(".")
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dhcp_upper = ip_parts.dup
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dhcp_upper[3] = 254
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options[:dhcp_upper] ||= dhcp_upper.join(".")
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end
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# Return the hostonly network configuration
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return options
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end
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def hostonly_adapter(config)
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@logger.debug("Searching for matching network: #{config[:ip]}")
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interface = find_matching_hostonly_network(config)
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if !interface
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@logger.debug("Network not found. Creating if we can.")
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# It is an error case if a specific name was given but the network
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# doesn't exist.
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if config[:name]
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raise Vagrant::Errors::NetworkNotFound, :name => config[:name]
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end
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# Otherwise, we create a new network and put the net network
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# in the list of available networks so other network definitions
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# can use it!
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interface = create_hostonly_network(config)
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@logger.debug("Created network: #{interface[:name]}")
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end
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if config[:type] == :dhcp
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# Check that if there is a DHCP server attached on our interface,
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# then it is identical. Otherwise, we can't set it.
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if interface[:dhcp]
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valid = interface[:dhcp][:ip] == config[:dhcp_ip] &&
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interface[:dhcp][:lower] == config[:dhcp_lower] &&
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interface[:dhcp][:upper] == config[:dhcp_upper]
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raise Vagrant::Errors::NetworkDHCPAlreadyAttached if !valid
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@logger.debug("DHCP server already properly configured")
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else
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# Configure the DHCP server for the network.
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@logger.debug("Creating a DHCP server...")
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@env[:machine].provider.driver.create_dhcp_server(interface[:name], config)
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end
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end
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return {
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:adapter => config[:adapter],
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:type => :hostonly,
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:hostonly => interface[:name],
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:mac_address => config[:mac],
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:nic_type => config[:nic_type]
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}
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end
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def hostonly_network_config(config)
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return {
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:type => config[:type],
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:adapter_ip => config[:adapter_ip],
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:ip => config[:ip],
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:netmask => config[:netmask]
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}
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end
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# Creates a new hostonly network that matches the network requested
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# by the given host-only network configuration.
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def create_hostonly_network(config)
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# Create the options that are going to be used to create our
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# new network.
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options = config.dup
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options[:ip] = options[:adapter_ip]
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@env[:machine].provider.driver.create_host_only_network(options)
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end
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# Finds a host only network that matches our configuration on VirtualBox.
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# This will return nil if a matching network does not exist.
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def find_matching_hostonly_network(config)
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this_netaddr = network_address(config[:ip], config[:netmask])
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@env[:machine].provider.driver.read_host_only_interfaces.each do |interface|
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if config[:name] && config[:name] == interface[:name]
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return interface
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elsif this_netaddr == network_address(interface[:ip], interface[:netmask])
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return interface
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end
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end
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nil
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end
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# Verifies that a host-only network subnet would not collide with
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# a bridged networking interface.
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#
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# If the subnets overlap in any way then the host only network
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# will not work because the routing tables will force the traffic
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# onto the real interface rather than the virtualbox interface.
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def verify_no_bridge_collision(options)
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this_netaddr = network_address(options[:ip], options[:netmask])
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@env[:machine].provider.driver.read_bridged_interfaces.each do |interface|
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that_netaddr = network_address(interface[:ip], interface[:netmask])
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raise Vagrant::Errors::NetworkCollision if this_netaddr == that_netaddr && interface[:status] != "Down"
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end
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end
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def bridged_config(args)
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options = args[0] || {}
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options = {} if !options.is_a?(Hash)
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return {
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:adapter => nil,
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:mac => nil,
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:bridge => nil,
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:auto_config => true,
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:use_dhcp_assigned_default_route => false
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}.merge(options)
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end
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def bridged_adapter(config)
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# Find the bridged interfaces that are available
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bridgedifs = @env[:machine].provider.driver.read_bridged_interfaces
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bridgedifs.delete_if { |interface| interface[:status] == "Down" }
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# The name of the chosen bridge interface will be assigned to this
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# variable.
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chosen_bridge = nil
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if config[:bridge]
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@logger.debug("Bridge was directly specified in config, searching for: #{config[:bridge]}")
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# Search for a matching bridged interface
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bridgedifs.each do |interface|
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if interface[:name].downcase == config[:bridge].downcase
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@logger.debug("Specific bridge found as configured in the Vagrantfile. Using it.")
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chosen_bridge = interface[:name]
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break
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end
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end
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# If one wasn't found, then we notify the user here.
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if !chosen_bridge
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@env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.specific_not_found",
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:bridge => config[:bridge])
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end
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end
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# If we still don't have a bridge chosen (this means that one wasn't
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# specified in the Vagrantfile, or the bridge specified in the Vagrantfile
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# wasn't found), then we fall back to the normal means of searchign for a
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# bridged network.
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if !chosen_bridge
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if bridgedifs.length == 1
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# One bridgable interface? Just use it.
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chosen_bridge = bridgedifs[0][:name]
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@logger.debug("Only one bridged interface available. Using it by default.")
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else
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# More than one bridgable interface requires a user decision, so
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# show options to choose from.
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@env[:ui].info I18n.t("vagrant.actions.vm.bridged_networking.available",
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:prefix => false)
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bridgedifs.each_index do |index|
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interface = bridgedifs[index]
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@env[:ui].info("#{index + 1}) #{interface[:name]}", :prefix => false)
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end
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# The range of valid choices
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valid = Range.new(1, bridgedifs.length)
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# The choice that the user has chosen as the bridging interface
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choice = nil
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while !valid.include?(choice)
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choice = @env[:ui].ask("What interface should the network bridge to? ")
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choice = choice.to_i
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end
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chosen_bridge = bridgedifs[choice - 1][:name]
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end
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end
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@logger.info("Bridging adapter #{config[:adapter]} to #{chosen_bridge}")
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# Given the choice we can now define the adapter we're using
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return {
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:adapter => config[:adapter],
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:type => :bridged,
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:bridge => chosen_bridge,
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:mac_address => config[:mac],
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:nic_type => config[:nic_type]
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}
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end
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def bridged_network_config(config)
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return {
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:type => :dhcp,
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:use_dhcp_assigned_default_route => config[:use_dhcp_assigned_default_route]
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}
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end
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end
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end
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end
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end
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