815 lines
19 KiB
Crystal
815 lines
19 KiB
Crystal
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require "option_parser"
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require "ipaddress"
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require "./colors"
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simulation = false
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file = nil
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prefered_network_configuration_program = nil
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prefered_wireless_configuration_program = nil
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prefered_dhcp_client = nil
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print_autodetect = false
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command = "list"
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OptionParser.parse! do |parser|
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parser.on "-s", "--simulation", "Export the network configuration." do
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simulation = true
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end
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parser.on "-a", "--print-autodetect", "Print autodetection of the installed programs." do
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print_autodetect = true
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end
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parser.on "-w wireless-configuration-program", "--wireless wireless-configuration-program", "iw" do |prog|
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prefered_wireless_configuration_program = prog
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end
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parser.on "-n network-configuration-program", "--net-conf network-configuration-program", "ifconfig | ip" do |prog|
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prefered_network_configuration_program = prog
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end
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parser.on "-d dhcp-client-program", "--dhcp-client dhcp-client-program", "udhcpc" do |prog|
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prefered_dhcp_client = prog
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end
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parser.on "-f file", "--file file", "Parse a configuration file." do |optsn|
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file = optsn
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end
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# 0: nothing is printed, 1: only events, 2: events and messages
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parser.on "-v verbosity", "--verbosity verbosity", "Verbosity (0-2). Default: 1" do |optsn|
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verbosity = optsn.to_i
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end
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parser.missing_option do |opt|
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STDERR.puts "You missed the argument for option #{opt}"
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# TODO: explain the different arguments
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exit 1
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end
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parser.invalid_option do |flag|
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STDERR.puts "Error: #{flag} not a valid option"
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exit 1
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end
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parser.unknown_args do |arg|
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command = arg.shift
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case command
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when /^(list)/
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STDERR.puts "TODO: list" unless arg.empty?
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when /^(connect)/
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STDERR.puts "TODO: connect" unless arg.empty?
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else
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STDERR.puts "Command #{command} not understood"
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end
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unless arg.empty?
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STDERR.puts "unknown arg: #{arg}"
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exit 1
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end
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end
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parser.on "-h", "--help", "Show this help" do
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puts parser
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exit 0
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end
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end
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class Do < Process
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class_property simulation = false
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def self.run(cmd : String, params : Array(String) = nil)
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if @@simulation
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puts "simulation, do: #{cmd} #{params.join(" ")}"
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Process::Status.new 0
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else
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Process.run cmd, params
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end
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end
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end
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class NotSetup
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def to_s(io : IO)
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io << "not setup"
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end
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end
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class DHCP
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def to_s(io : IO)
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io << "dhcp"
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end
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end
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class NetworkCommands
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class_property cmd_network_configuration : IfconfigCommand.class | IPCommand.class = IfconfigCommand
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class_property cmd_wireless_configuration : IWCommand.class | NotSetup.class = NotSetup
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class_property cmd_dhcp_client : UDHCPCCommand.class | DHClientCommand.class | NotSetup.class = NotSetup
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class IWCommand
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def self.get_ssid(ifname : String, ssid)
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unless Do.run(cmd, [ name ]).success?
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raise "(#{cmd}) dhcp failed on #{ifname}"
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end
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end
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end
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class UDHCPCCommand
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def self.run(ifname : String)
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# TODO: verify which dhcp client is installed on the system
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cmd = "udhcpc"
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unless Do.run(cmd, [ name ]).success?
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raise "(#{cmd}) dhcp failed on #{ifname}"
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end
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end
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end
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class DHClientCommand
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def self.run(ifname : String)
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# TODO: verify which dhcp client is installed on the system
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cmd = "udhcpc"
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unless Do.run(cmd, [ name ]).success?
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raise "(#{cmd}) dhcp failed on #{ifname}"
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end
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end
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end
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class IfconfigCommand
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def self.interface_exists(name : String)
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Do.run("ifconfig", [ name ]).success?
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end
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def self.up_or_down(name : String, updown : String)
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unless Do.run("ifconfig", [ name, updown ]).success?
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raise "(ifconfig) Cannot set #{updown} link name #{name}"
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end
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end
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def self.up(name : String)
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self.up_or_down name, "up"
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end
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def self.down(name : String)
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self.up_or_down name, "down"
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end
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def self.set_ip(name : String, ip : IPAddress)
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unless Do.run("ifconfig", [ name, "add", ip.to_string ]).success?
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raise "(ifconfig) Cannot set ip address #{ip.to_string} for #{name}"
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end
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end
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# currently, aliasses with ifconfig: ifconfig add ip/mask
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# same command as the ip setup
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def self.set_alias(name : String, ip : IPAddress)
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unless Do.run("ifconfig", [ name, "add", ip.to_string ]).success?
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raise "(ifconfig) Cannot set ip address alias #{ip.to_string} for #{name}"
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end
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end
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def self.mtu(name : String, mtu : Int32?)
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unless Do.run("ifconfig", [ name, "mtu", mtu.to_s ]).success?
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raise "(ifconfig) Cannot set mtu #{mtu} for #{name}"
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end
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end
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def self.description(name : String, description : String)
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unless Do.run("ifconfig", [ name, "description", "\"#{description}\"" ]).success?
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raise "(ifconfig) Cannot set description #{description} for #{name}"
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end
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end
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end
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class IPCommand
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def self.interface_exists(name : String)
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Do.run("ip", [ "link", "show", "dev", name ]).success?
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end
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def self.up_or_down(name : String, updown : String)
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unless Do.run("ip", [ "link", "set", updown, "dev", name ]).success?
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raise "(ip) Cannot set #{updown} link name #{name}"
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end
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end
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def self.up(name : String)
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self.up_or_down name, "up"
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end
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def self.down(name : String)
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self.up_or_down name, "down"
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end
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def self.set_ip(name : String, ip : IPAddress)
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unless Do.run("ip", [ "address", "add", ip.to_string, "dev", name ]).success?
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raise "(ip) Cannot add ip address #{ip.to_string} to #{name}"
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end
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end
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def self.set_alias(name : String, ip : IPAddress)
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unless Do.run("ip", [ "address", "add", ip.to_string, "dev", name ]).success?
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raise "(ip) Cannot add ip address alias #{ip.to_string} to #{name}"
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end
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end
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def self.mtu(name : String, mtu : Int32?)
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unless Do.run("ip", [ "link", "set", "mtu", mtu.to_s, "dev", name ]).success?
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raise "(ip) Cannot set mtu #{mtu} to #{name}"
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end
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end
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def self.description(name : String, description : String)
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puts "TODO: (ip) setup description '#{description}' to interface #{name}"
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# unless Do.run("ip", [ "link", "set", "description", description, "dev", name ]).success?
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# raise "(ip) Cannot set description #{description} to #{name}"
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# end
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end
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end
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def self.interface_exists(name : String)
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@@cmd_network_configuration.interface_exists(name)
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end
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def self.up(ifname : String)
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@@cmd_network_configuration.up(ifname)
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end
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def self.down(ifname : String)
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@@cmd_network_configuration.up(ifname)
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end
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def self.set_ip(name : String, ip : IPAddress)
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@@cmd_network_configuration.set_ip name, ip
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end
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def self.dhcp(name : String)
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cmd = @@cmd_dhcp_client
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case cmd
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when NotSetup
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puts "no dhcp client: cannot perform dhcp on #{name}"
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when UDHCPCCommand
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cmd.run name
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end
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end
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def self.set_alias(name : String, ip : IPAddress)
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@@cmd_network_configuration.set_alias name, ip
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end
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def self.mtu(name : String, mtu : Int32?)
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@@cmd_network_configuration.mtu name, mtu
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end
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def self.description(name : String, description : String)
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@@cmd_network_configuration.description name, description
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end
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def self.wireless_list_ssid(ifname : String)
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cmd = @@cmd_wireless_configuration
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case cmd
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when NotSetup
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puts "no wireless configuration program: cannot list ssid"
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when IWCommand
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cmd.list_ssid ifname
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end
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end
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def self.wireless_connect_wpa_psk(ifname : String, ssid : String, passwd : String)
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cmd = @@cmd_wireless_configuration
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case cmd
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when NotSetup
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puts "no wireless configuration program: cannot connect to ssid #{ssid}"
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when IWCommand
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cmd.list_ssid ifname
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end
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end
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end
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class WirelessAPSetup
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property ssid : String
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# This is a list of parameters that should be unique to each AP
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property up : Bool
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property description : String?
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property mtu : Int32?
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property main_ip_v4 : IPAddress | DHCP | NotSetup
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property main_ip_v6 : IPAddress | DHCP | NotSetup
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property aliasses_v4 : Array(IPAddress)
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property aliasses_v6 : Array(IPAddress)
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property dns : Array(IPAddress)
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# we currently only support WPA2-PSK wireless security mechanism
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property security : WPA
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class WPA
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property key : String
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def initialize(@key)
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end
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end
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def initialize(@ssid, @security)
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@main_ip_v4 = NotSetup.new
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@main_ip_v6 = NotSetup.new
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@aliasses_v4 = Array(IPAddress).new
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@aliasses_v6 = Array(IPAddress).new
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@up = true
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@dns = Array(IPAddress).new
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end
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def to_s(io : IO)
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io << to_string
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end
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def to_string
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String.build do |str|
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str << "\t#{CBLUE}#{ssid}#{CRESET}\n"
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str << "\t\t#description #{description.not_nil!}\n" unless description.nil?
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str << "\t\t#{@up? "up" : "down"}\n"
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str << "\t\tmtu #{mtu}\n" unless mtu.nil?
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# ipv4
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unless main_ip_v4.is_a?(NotSetup)
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str << "\t\tinet #{main_ip_v4}\n"
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end
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aliasses_v4.each do |a|
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str << "\t\talias #{a}\n"
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end
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# ipv6
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unless main_ip_v6.is_a?(NotSetup)
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str << "\t\tinet6 #{main_ip_v6}\n"
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end
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unless @aliasses_v6.empty?
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@aliasses_v6.each do |a|
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str << "\t\talias6 #{a}\n"
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end
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end
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if dns.empty?
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str << "\t\tno dns configured\n"
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else
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dns.each do |ip|
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str << "\t\tdns: #{ip}\n"
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end
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end
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# to improve readability
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str << "\n"
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end
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end
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end
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#
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# interface configuration
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#
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class InterfaceConfiguration
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property name : String
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property up : Bool
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property description : String?
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property mtu : Int32?
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property wireless : Bool
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property main_ip_v4 : IPAddress | DHCP | NotSetup
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property main_ip_v6 : IPAddress | DHCP | NotSetup
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property aliasses_v4 : Array(IPAddress)
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property aliasses_v6 : Array(IPAddress)
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property wireless_networks : Hash(String, WirelessAPSetup)
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property dns : Array(IPAddress)
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def initialize (@name, @up,
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@description,
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@mtu,
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@main_ip_v4, @main_ip_v6, aliasses,
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@wireless, @wireless_networks,
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@dns = Array(IPAddress).new
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)
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@aliasses_v4 = Array(IPAddress).new
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@aliasses_v6 = Array(IPAddress).new
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aliasses.each do |ip|
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if ip.ipv4?
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aliasses_v4 << ip
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else
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aliasses_v6 << ip
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end
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end
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end
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def to_s(io : IO)
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io << to_string
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end
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def to_string
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String.build do |str|
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if NetworkCommands.interface_exists(@name)
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str << "#{CGREEN}#{@name}#{CRESET}\n"
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else
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str << "#{CRED}#{@name}#{CRESET}\n"
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end
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str << "\tdescription: '#{description.not_nil!}'\n" unless description.nil?
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str << "\t#{@up? "up" : "down"}\n"
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unless mtu.nil?
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str << "\tmtu #{mtu}\n"
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end
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# ipv4
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unless main_ip_v4.is_a?(NotSetup)
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str << "\tinet #{main_ip_v4}\n"
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end
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unless aliasses_v4.empty?
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aliasses_v4.each do |a|
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str << "\talias #{a}\n"
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end
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end
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# ipv6
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unless main_ip_v6.is_a?(NotSetup)
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str << "\tinet6 #{main_ip_v6}\n"
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end
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unless aliasses_v6.empty?
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aliasses_v6.each do |a|
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str << "\talias6 #{a}\n"
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end
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end
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unless dns.empty?
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dns.each do |ip|
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str << "\tdns: #{ip}\n"
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end
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end
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unless wireless_networks.empty?
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# to improve readability
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str << "\n"
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wireless_networks.each do |k,v|
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str << v
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end
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end
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end
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end
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# configure the interface
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def execute
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unless NetworkCommands.interface_exists(@name)
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raise "The interface #{@name} doesn't exists, yet."
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end
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if up
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NetworkCommands.up name
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else
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puts "not marked as 'up' -- ending here"
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return
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end
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unless mtu.nil?
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NetworkCommands.mtu name, mtu
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end
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unless description.nil?
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NetworkCommands.description name, description.not_nil!
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end
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# ipv4 configuration
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main_ip_v4.tap do |ip|
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case ip
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when IPAddress
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NetworkCommands.set_ip name, ip
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when DHCP
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NetworkCommands.dhcp name
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when NotSetup
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puts "no ipv4"
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else
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raise "ipv4 configuration: neither static nor dynamic"
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end
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# We wont setup aliasses unless there is an actual IP address
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if ip != NotSetup
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aliasses_v4.each do |ip_alias|
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NetworkCommands.set_alias name, ip_alias
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end
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end
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end
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# ipv6 configuration
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main_ip_v6.tap do |ip|
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case ip
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when IPAddress
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NetworkCommands.set_ip name, ip
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# TODO
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#when Autoconfiguration
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# NetworkCommands.autoconfiguration name
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#when DHCP
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# NetworkCommands.dhcp6 name
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when NotSetup
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puts "no ipv6"
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else
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raise "ipv4 configuration: neither static nor dynamic"
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end
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# We wont setup aliasses unless there is an actual IP address
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if ip != NotSetup
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aliasses_v6.each do |ip_alias|
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NetworkCommands.set_alias name, ip_alias
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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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|
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class NetworkConfigurationParser
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def self.parse_file(file_name : String) : InterfaceConfiguration
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content = File.read(file_name)
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content = content.rchop
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ifname = /.([a-zA-Z0-9]+)$/.match(file_name).try &.[1]
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if ifname.nil?
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raise "The interface name is not known from the filename: '#{file_name}'"
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end
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|
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wireless = false
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wireless = true unless /^wl[0-9]+$/.match(ifname)
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self.parse(ifname.not_nil!, content, wireless)
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end
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|
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def self.parse (ifname : String, data : String, wireless = false) : InterfaceConfiguration
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up = false
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description = nil
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mtu = nil
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main_ip_v4 = NotSetup.new
|
|
main_ip_v6 = NotSetup.new
|
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|
|
dns = Array(IPAddress).new
|
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|
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aliasses = [] of IPAddress
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|
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wireless_networks = {} of String => WirelessAPSetup
|
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|
|
data.split("\n").each do |line|
|
|
case line
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|
when /^up/
|
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up = true
|
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when /^description/
|
|
description = /^description (.+)/.match(line).try &.[1]
|
|
when /^inet6? alias .*/
|
|
ipstr = /^inet6? alias ([a-f0-9:.\/]+)/.match(line).try &.[1]
|
|
if ipstr.nil?
|
|
puts "wrong IP address alias, line #{line}"
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next
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|
end
|
|
aliasses.push IPAddress.parse(ipstr)
|
|
when /^inet6? dhcp/
|
|
# IP address is DHCP
|
|
if /^inet /.match(line)
|
|
main_ip_v4 = DHCP.new
|
|
else
|
|
main_ip_v6 = DHCP.new
|
|
end
|
|
when /^inet6 autoconf/
|
|
# IP address is autoconfigured
|
|
puts "TODO: IPv6 autoconfiguration"
|
|
|
|
when /^inet6? .*/
|
|
ipstr = /^inet6? ([a-f0-9:.\/]+)/.match(line).try &.[1]
|
|
if ipstr.nil?
|
|
puts "wrong IP address, line #{line}"
|
|
next
|
|
end
|
|
if /^inet /.match(line)
|
|
main_ip_v4 = IPAddress.parse ipstr
|
|
else
|
|
main_ip_v6 = IPAddress.parse ipstr
|
|
end
|
|
when /^join [^ \t]+ wpakey .*/
|
|
# WPA2-PSK, other security mechanisms are not supported, yet
|
|
ssid = /^join ([^ \t]+)/.match(line).try &.[1]
|
|
wpakeystr = /^join [^ \t]+ wpakey ([^ \t]+)/.match(line).try &.[1]
|
|
|
|
if ssid.nil?
|
|
puts "wrong SSID in line: #{line}"
|
|
next
|
|
end
|
|
|
|
if wpakeystr.nil?
|
|
puts "wrong wpa key in line: #{line}"
|
|
next
|
|
end
|
|
|
|
# TODO
|
|
new_ap = WirelessAPSetup.new ssid, WirelessAPSetup::WPA.new(wpakeystr)
|
|
wireless_networks[ssid] = new_ap
|
|
|
|
|
|
when /^network [^ \t]+ inet6 autoconf/
|
|
puts "TODO: network SSID inet6 autoconf"
|
|
|
|
ssid = /^network ([^ \t]+)/.match(line).try &.[1]
|
|
ipstr = /^network [^ \t]+ inet6? ([^ \t]+)/.match(line).try &.[1]
|
|
|
|
if ssid.nil?
|
|
puts "wrong SSID in line: #{line}"
|
|
next
|
|
end
|
|
|
|
if ipstr.nil?
|
|
puts "wrong ip address in line: #{line}"
|
|
next
|
|
end
|
|
|
|
# TODO
|
|
access_point = wireless_networks[ssid].not_nil!
|
|
|
|
when /^network [^ \t]+ inet6? .*/
|
|
ssid = nil
|
|
ipstr = nil
|
|
|
|
/^network (?<ssid>[^ \t]+) inet6? (?<ip>[^ \t]+)/.match(line).try do |m|
|
|
ssid = m["ssid"]
|
|
ipstr = m["ip"]
|
|
end
|
|
|
|
if ssid.nil?
|
|
puts "wrong SSID in line: #{line}"
|
|
next
|
|
end
|
|
|
|
if ipstr.nil?
|
|
puts "wrong ip address in line: #{line}"
|
|
next
|
|
end
|
|
|
|
# TODO
|
|
ipaddr = IPAddress.parse ipstr
|
|
|
|
# TODO
|
|
access_point = wireless_networks[ssid].not_nil!
|
|
|
|
if ipaddr.ipv4?
|
|
access_point.main_ip_v4 = ipaddr
|
|
elsif ipaddr.ipv6?
|
|
access_point.main_ip_v6 = ipaddr
|
|
else
|
|
puts "wrong ip address in line: #{line} (neither ipv4 or ipv6)"
|
|
end
|
|
|
|
when /^network [^ ]+ dhcp6?/
|
|
ssid = /^network (?<ssid>[^ \t]+)/.match(line).try &.["ssid"]
|
|
|
|
if ssid.nil?
|
|
puts "wrong SSID in line: #{line}"
|
|
next
|
|
end
|
|
|
|
access_point = wireless_networks[ssid].not_nil!
|
|
|
|
if /dhcp6/.match(line)
|
|
access_point.main_ip_v6 = DHCP.new
|
|
elsif /dhcp/.match(line)
|
|
access_point.main_ip_v4 = DHCP.new
|
|
else
|
|
puts "wrong dhcp instruction in line: #{line}"
|
|
end
|
|
|
|
when /^network [^ ]+ dns .*/
|
|
ssid = nil
|
|
ipstr = nil
|
|
|
|
/^network (?<ssid>[^ \t]+) dns (?<ip>[^ \t]+)/.match(line).try do |m|
|
|
ssid = m["ssid"]
|
|
ipstr = m["ip"]
|
|
end
|
|
|
|
if ssid.nil?
|
|
puts "wrong SSID in line: #{line}"
|
|
next
|
|
end
|
|
|
|
if ipstr.nil?
|
|
puts "wrong ip address in line: #{line}"
|
|
next
|
|
end
|
|
|
|
access_point = wireless_networks[ssid].not_nil!
|
|
ipaddr = IPAddress.parse ipstr
|
|
access_point.dns << ipaddr
|
|
|
|
when /^mtu [0-9]+/
|
|
mtu = /^mtu ([0-9]+)/.match(line).try &.[1].to_i
|
|
|
|
when /^dns [^ \t]+/
|
|
ipstr = nil
|
|
|
|
/^dns (?<ip>[^ \t]+)/.match(line).try do |m|
|
|
ipstr = m["ip"]
|
|
end
|
|
|
|
if ipstr.nil?
|
|
puts "wrong ip address in line: #{line}"
|
|
next
|
|
end
|
|
|
|
ipaddr = IPAddress.parse ipstr
|
|
dns << ipaddr
|
|
|
|
when /^#.*$/
|
|
# simple comment
|
|
when /^[ \t]*$/
|
|
# empty line
|
|
else
|
|
raise "Cannot parse: #{line}"
|
|
end
|
|
end
|
|
|
|
InterfaceConfiguration.new(ifname, up,
|
|
description,
|
|
mtu,
|
|
main_ip_v4, main_ip_v6,
|
|
aliasses,
|
|
wireless, wireless_networks,
|
|
dns)
|
|
end
|
|
end
|
|
|
|
|
|
|
|
class Autodetect
|
|
class_property print_autodetect : Bool = false
|
|
|
|
def self.which(cmd : String)
|
|
if Process.run("which", [ cmd ]).success?
|
|
puts "#{cmd} installed" if print_autodetect
|
|
true
|
|
else
|
|
puts "#{cmd} not installed" if print_autodetect
|
|
false
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
Do.simulation = simulation
|
|
Autodetect.print_autodetect = print_autodetect
|
|
|
|
#
|
|
# discover available configuration commands
|
|
#
|
|
|
|
# ifconfig = *bsd and some linux
|
|
# ip = linux
|
|
possible_network_configuration_cmds = {
|
|
"ifconfig" => NetworkCommands::IfconfigCommand,
|
|
"ip" => NetworkCommands::IPCommand
|
|
}
|
|
|
|
# udhcpc = busybox dhcp client
|
|
possible_dhcp_clients = {
|
|
"udhcpc" => NetworkCommands::UDHCPCCommand,
|
|
"dhclient" => NetworkCommands::DHClientCommand
|
|
}
|
|
|
|
# iw = linux
|
|
possible_wireless_configuration_cmds = {
|
|
"iw" => NetworkCommands::IWCommand
|
|
}
|
|
|
|
key = prefered_network_configuration_program
|
|
key = possible_network_configuration_cmds.keys.find { |key| Autodetect.which(key) } if key.nil?
|
|
# should crash if there is no network command installed
|
|
NetworkCommands.cmd_network_configuration = possible_network_configuration_cmds[key.not_nil!]
|
|
|
|
key = prefered_dhcp_client
|
|
key = possible_dhcp_clients.keys.find { |key| Autodetect.which(key) } if key.nil?
|
|
# should not crash if there is no
|
|
NetworkCommands.cmd_dhcp_client = possible_dhcp_clients[key] unless key.nil?
|
|
|
|
key = prefered_wireless_configuration_program
|
|
key = possible_wireless_configuration_cmds.keys.find { |key| Autodetect.which(key) } if key.nil?
|
|
# should crash if there is no wireless command installed
|
|
NetworkCommands.cmd_wireless_configuration = possible_wireless_configuration_cmds[key.not_nil!]
|
|
|
|
|
|
if file.nil?
|
|
raise "Cannot search for files yet"
|
|
end
|
|
|
|
case command
|
|
when "list"
|
|
# TODO: why having to force "not_nil!" ? Seems like a compiler bug
|
|
puts NetworkConfigurationParser.parse_file(file.not_nil!)
|
|
when "connect"
|
|
# TODO: why having to force "not_nil!" ? Seems like a compiler bug
|
|
network_configuration = NetworkConfigurationParser.parse_file(file.not_nil!)
|
|
network_configuration.execute
|
|
end
|