mtu, description, mockups

src/main.cr

@@ -116,6 +116,18 @@ class NetworkCommands
 				raise "(ifconfig) Cannot set ip address alias #{ip.to_string} for #{name}"
 			end
 		end
+
+		def self.mtu(name : String, mtu : Int32?)
+			unless Do.run("ifconfig", [ name, "mtu", mtu.to_s ]).success?
+				raise "(ifconfig) Cannot set mtu #{mtu} for #{name}"
+			end
+		end
+
+		def self.description(name : String, description : String)
+			unless Do.run("ifconfig", [ name, "description", "\"#{description}\"" ]).success?
+				raise "(ifconfig) Cannot set description #{description} for #{name}"
+			end
+		end
 	end
 
 	class IPCommand
@@ -146,8 +158,20 @@ class NetworkCommands
 				raise "(ip) Cannot add ip address alias #{ip.to_string} to #{name}"
 			end
 		end
+
+		def self.mtu(name : String, mtu : Int32?)
+			unless Do.run("ip", [ "link", "set", "mtu", mtu.to_s, "dev", name ]).success?
+				raise "(ip) Cannot set mtu #{mtu} to #{name}"
+			end
 		end
 
+		def self.description(name : String, description : String)
+			puts "TODO: (ip) setup description '#{description}' to interface #{name}"
+			# unless Do.run("ip", [ "link", "set", "description", description, "dev", name ]).success?
+			# 	raise "(ip) Cannot set description #{description} to #{name}"
+			# end
+		end
+	end
 
 	def self.interface_exists(name : String)
 		@@cmd_network_configuration.interface_exists(name)
@@ -179,6 +203,14 @@ class NetworkCommands
 		@@cmd_network_configuration.set_alias name, ip
 	end
 
+	def self.mtu(name : String, mtu : Int32?)
+		@@cmd_network_configuration.mtu name, mtu
+	end
+
+	def self.description(name : String, description : String)
+		@@cmd_network_configuration.description name, description
+	end
+
 	def self.wireless_list_ssid(ifname : String)
 		cmd = @@cmd_wireless_configuration
 		case cmd
@@ -232,6 +264,7 @@ class InterfaceConfiguration
 	property name : String
 	property up : Bool
 	property description : String?
+	property mtu : Int32?
 	property wireless : Bool
 	property main_ip_v4 : IPAddress | DHCP | NotSetup
 	property main_ip_v6 : IPAddress | DHCP | NotSetup
@@ -241,8 +274,10 @@ class InterfaceConfiguration
 
 	def initialize (@name, @up,
 					@description,
+					@mtu,
 					@main_ip_v4, @main_ip_v6, aliasses,
 					@wireless, @wireless_networks)
+
 		@aliasses_v4 = Array(IPAddress).new
 		@aliasses_v6 = Array(IPAddress).new
 
@@ -267,10 +302,14 @@ class InterfaceConfiguration
 				str << "#{CRED}#{@name}#{CRESET}\n"
 			end
 
-			str << "\t#{@up? "up" : "down"}\n"
-			description = @description
 			str << "\t#description #{description.not_nil!}\n" unless description.nil?
 
+			str << "\t#{@up? "up" : "down"}\n"
+
+			unless mtu.nil?
+				str << "\tmtu #{mtu}\n"
+			end
+
 			# ipv4
 			str << "\tinet #{@main_ip_v4}\n"
 			unless @aliasses_v4.empty?
@@ -302,6 +341,16 @@ class InterfaceConfiguration
 			return
 		end
 
+		mtu = @mtu
+		unless mtu.nil?
+			NetworkCommands.mtu @name, mtu
+		end
+
+		description = @description
+		unless description.nil?
+			NetworkCommands.description @name, description
+		end
+
 		# ipv4 configuration
 		@main_ip_v4.tap do |ip|
 			case ip
@@ -325,6 +374,7 @@ class InterfaceConfiguration
 
 		# ipv6 configuration
 		@main_ip_v6.tap do |ip|
+
 			case ip
 			when IPAddress
 				NetworkCommands.set_ip @name, ip
@@ -366,6 +416,7 @@ class NetworkConfigurationParser
 	def self.parse (ifname : String, data : String, wireless = false) : InterfaceConfiguration
 		up = false
 		description = nil
+		mtu = nil
 		main_ip_v4 = NotSetup.new
 		main_ip_v6 = NotSetup.new
 
@@ -393,6 +444,9 @@ class NetworkConfigurationParser
 				else
 					main_ip_v6 = InterfaceConfiguration::DHCP.new
 				end
+			when /^inet6 autoconf/
+				# IPaddress is autoconfigured
+				puts "TODO: IPv6 autoconfiguration"
 			when /^inet6? .*/
 				ipstr = /^inet6? ([a-f0-9:.\/]+)/.match(line).try &.[1]
 				if ipstr.nil?
@@ -413,6 +467,12 @@ class NetworkConfigurationParser
 			when /^network [^ ]+ dhcp/
 				puts "TODO: network SSID dhcp"
 
+			when /^network [^ ]+ dns .*/
+				puts "TODO: network SSID dns"
+
+			when /^mtu [0-9]+/
+				mtu = /^mtu ([0-9]+)/.match(line).try &.[1].to_i
+
 			when /^#.*$/
 				# simple comment
 			when /^[ \t]*$/
@@ -424,6 +484,7 @@ class NetworkConfigurationParser
 
 		InterfaceConfiguration.new(ifname, up,
 								   description,
+								   mtu,
 								   main_ip_v4, main_ip_v6,
 								   aliasses,
 								   wireless, wireless_networks)
@@ -484,5 +545,6 @@ if file.nil?
 	raise "Cannot choose files yet"
 else
 	# TODO: why having to force "not_nil!" ? Seems like a compiler bug
-NetworkConfigurationParser.parse_file(file.not_nil!).execute
+	network_configuration = NetworkConfigurationParser.parse_file(file.not_nil!)
+	network_configuration.execute
 end