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@ -0,0 +1,328 @@ |
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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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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 "-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.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 NetworkCommands |
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class DHCPCommands |
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def self.dhcp(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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def self.which(cmd : String) |
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Do.run("which", [ cmd ]).success? |
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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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puts "(ip) setup static IP address" |
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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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puts "(ip) setup static IP address" |
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end |
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end |
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def self.choose_command : IfconfigCommand.class | IPCommand.class |
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if self.which("ifconfig") |
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IfconfigCommand |
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elsif self.which("ip") |
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IPCommand |
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else |
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raise "Neither ifconfig or ip commands exists on this system" |
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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 = self.choose_command |
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cmd.interface_exists?(name) |
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end |
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def self.up(ifname : String) |
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cmd = self.choose_command |
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cmd.up(ifname) |
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end |
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def self.down(ifname : String) |
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cmd = self.choose_command |
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cmd.up(ifname) |
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end |
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def self.set_ip(name : String, ip : IPAddress) |
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puts "(ip) setup static IP address" |
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end |
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def self.dhcp(name : String) |
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puts "(ip) setup dynamic IP address" |
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DHCPCommands.dhcp name |
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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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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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property name : String |
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property up : 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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def initialize (@name, @up, @main_ip_v4, @main_ip_v6, aliasses) |
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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 << "\t#{@up? "up" : "down"}\n" |
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str << "\tinet #{@main_ip_v4}\n" |
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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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str << "\tinet6 #{@main_ip_v6}\n" |
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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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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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puts "OK on va configurer ça" |
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puts "#{self}" |
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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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case main_ip_v4 = @main_ip_v4 |
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when IPAddress |
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NetworkCommands.set_ip @name, main_ip_v4 |
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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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case main_ip_v6 = @main_ip_v6 |
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when IPAddress |
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NetworkCommands.set_ip @name, main_ip_v6 |
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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 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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# str << "\tinet #{@main_ip_v4}\n" |
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# str << "\t#{@up? "up" : "down"}\n" |
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# str << "\tinet #{@main_ip_v4}\n" |
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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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# str << "\tinet6 #{@main_ip_v6}\n" |
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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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# alias execution: only when the main ip address is setup |
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end |
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end |
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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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self.parse(ifname.not_nil!, content) |
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end |
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def self.parse (ifname : String, data : String) : InterfaceConfiguration |
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up = false |
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main_ip_v4 = InterfaceConfiguration::NotSetup.new |
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main_ip_v6 = InterfaceConfiguration::NotSetup.new |
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aliasses = [] of IPAddress |
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data.split("\n").each do |line| |
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case line |
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when /^up/ |
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up = true |
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when /^inet6? alias .*/ |
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ipstr = /^inet6? alias ([a-f0-9:.\/]+)/.match(line).try &.[1] |
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if ipstr.nil? |
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puts "wrong IP address alias, line #{line}" |
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next |
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end |
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aliasses.push IPAddress.parse(ipstr) |
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when /^inet6? dhcp/ |
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# IPaddress is DHCP |
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if /^inet /.match(line) |
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main_ip_v4 = InterfaceConfiguration::DHCP.new |
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else |
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main_ip_v6 = InterfaceConfiguration::DHCP.new |
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end |
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when /^inet6? .*/ |
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ipstr = /^inet6? ([a-f0-9:.\/]+)/.match(line).try &.[1] |
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if ipstr.nil? |
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puts "wrong IP address, line #{line}" |
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next |
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end |
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if /^inet /.match(line) |
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main_ip_v4 = IPAddress.parse ipstr |
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else |
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main_ip_v6 = IPAddress.parse ipstr |
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end |
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else |
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raise "Cannot parse: #{line}" |
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end |
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end |
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InterfaceConfiguration.new(ifname, up, main_ip_v4, main_ip_v6, aliasses) |
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end |
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end |
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Do.simulation = simulation |
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if file.nil? |
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raise "Cannot choose files yet" |
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else |
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# TODO: why having to force "not_nil!" ? Seems like a compiler bug |
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NetworkConfigurationParser.parse_file(file.not_nil!).execute |
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end |
Philippe PITTOLI
3 years ago