Add infrastructure to read NetworManager connections

* It is a WIP.
* Many of the settings are not actually read yet.

src/lib/cfa/nm_connection.rb

@@ -17,7 +17,9 @@
 # To contact SUSE LLC about this file by physical or electronic mail, you may
 # find current contact information at www.suse.com.
 
+require "yast"
 require "cfa/base_model"
+require "y2network/interface_type"
 
 Yast.import "Installation"
 
@@ -93,6 +95,20 @@ def add_collection(section, name, values)
       end
     end
 
+    TYPES_MAP = {
+      wifi:     Y2Network::InterfaceType::WIRELESS,
+      ethernet: Y2Network::InterfaceType::ETHERNET
+    }.freeze
+    private_constant :TYPES_MAP
+
+    # Determines the interface type according to the content of the file
+    #
+    # @return [Y2Network::InterfaceType] Interface type
+    def type
+      TYPES_MAP[connection["type"]&.to_sym] ||
+        Y2Network::InterfaceType::UNKNOWN
+    end
+
     KNOWN_SECTIONS.each { |s| define_method(s) { section_for(s) } }
   end
 end

src/lib/y2network/network_manager/config_reader.rb

@@ -0,0 +1,48 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+require "y2network/config_reader"
+require "y2network/backends"
+require "y2network/network_manager/connection_configs_reader"
+
+module Y2Network
+  module NetworkManager
+    # This class reads the current network configuration from NetworkManager
+    class ConfigReader < Y2Network::ConfigReader
+      SECTIONS = [
+        :interfaces, :connections
+      ].freeze
+
+      def config
+        Y2Network::Config.new(
+          connections: connection_configs_reader.connections,
+          backend:     Y2Network::Backends::NetworkManager.new,
+          source:      :network_manager
+        )
+      end
+
+    private
+
+      def connection_configs_reader
+        @connection_configs_reader ||= Y2Network::NetworkManager::ConnectionConfigsReader.new
+      end
+    end
+  end
+end

src/lib/y2network/network_manager/connection_config_reader.rb

@@ -0,0 +1,48 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+module Y2Network
+  module NetworkManager
+    # Reads a connection configuration from a given file
+    class ConnectionConfigReader
+      # TODO: make this signature consistent with Wicked::ConnectionConfigReader
+      def read(file)
+        file.load
+        handler_class = find_handler_class(file.type)
+        return nil if handler_class.nil?
+
+        handler_class.new(file).connection_config
+      end
+
+    private
+
+      # Returns the class to handle a given interface type
+      #
+      # @param type [InterfaceType] interface type
+      # @return [Class] A class which belongs to the ConnectionConfigReaders module
+      def find_handler_class(type)
+        require "y2network/network_manager/connection_config_readers/#{type.file_name}"
+        ConnectionConfigReaders.const_get(type.class_name)
+      rescue LoadeError, NameError => e
+        log.info "Unknown connection type: '#{type}'. " \
+                 "Connection handler could not be loaded: #{e.message}"
+      end
+    end
+  end
+end

src/lib/y2network/network_manager/connection_config_readers/base.rb

@@ -0,0 +1,125 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+module Y2Network
+  module NetworkManager
+    module ConnectionConfigReaders
+      # This is the base class for connection config readers.
+      #
+      # The derived classes should reimplement the {#update_connection_config}
+      # method.
+      class Base
+        # @return [CFA::NmConnection] Connection configuration file
+        attr_reader :file
+
+        # Constructor
+        #
+        # @return [CFA::NmConnection] Connection configuration file
+        def initialize(file)
+          @file = file
+        end
+
+        # Builds a connection configruation object from the file
+        #
+        # @return [Y2Network::ConnectionConfig::Base]
+        def connection_config
+          connection_class.new.tap do |conn|
+            conn.bootproto = bootproto
+            conn.name = file.connection["id"]
+            conn.description = conn.name.clone
+            conn.startmode = startmode
+            conn.firewall_zone = file.connection["zone"]
+            conn.ip = all_ips.first
+            conn.ip_aliases = all_ips[1..-1]
+            # TODO: hostnames (pending)
+            update_connection_config(conn)
+          end
+        end
+
+      protected
+
+        # Sets connection config settings from the given file.
+        #
+        # @note This method is expected to be redefined by derived classes.
+        #
+        # @param _conn [Y2Network::ConnectionConfig::Base]
+        def update_connection_config(_conn); end
+
+      private
+
+        # Returns the class of the connection configuration
+        #
+        # TODO: duplicated (see Y2Network::Wicked::ConnectionConfigReaders::Base)
+        #
+        # @return [Class]
+        def connection_class
+          class_name = self.class.to_s.split("::").last
+          file_name = class_name.gsub(/(\w)([A-Z])/, "\\1_\\2").downcase
+          require "y2network/connection_config/#{file_name}"
+          Y2Network::ConnectionConfig.const_get(class_name)
+        end
+
+        NM_DHCP = "auto".freeze
+
+        # Determines the value for the BOOTPROTO parameter
+        #
+        # @return [Y2Network::BootProtocol]
+        def bootproto
+          ipv4_method = file.ipv4["method"]
+          ipv6_method = file.ipv6["method"]
+
+          if ipv4_method == NM_DHCP && ipv6_method == NM_DHCP
+            Y2Network::BootProtocol::DHCP
+          elsif ipv4_method == NM_DHCP
+            Y2Network::BootProtocol::DHCP4
+          elsif ipv6_method == NM_DHCP
+            Y2Network::BootProtocol::DHCP6
+          elsif ipv4_method || ipv6_method
+            Y2Network::BootProtocol::STATIC
+          else
+            Y2Network::BootProtocol::NONE
+          end
+        end
+
+        # Determines the value for the STARTMODE parameter
+        #
+        # @return [Y2]
+        def startmode
+          return Y2Network::Startmode.create("off") if file.connection["autoconnect"] == "false"
+
+          Y2Network::Startmode.create("auto")
+        end
+
+        def all_ips
+          @all_ips = ips_from_section(file.ipv4) + ips_from_section(file.ipv6)
+        end
+
+        def ips_from_section(section)
+          address_items = section.data.select { |i| i[:key] =~ /\Aaddress\d+\Z/ }
+          address_items.map do |item|
+            addr, _gateway = item[:value].split(",")
+            ip_address = Y2Network::IPAddress.from_string(addr)
+            # TODO: handle the gateway too
+            Y2Network::ConnectionConfig::IPConfig.new(ip_address)
+          end
+        end
+      end
+    end
+  end
+end

src/lib/y2network/network_manager/connection_config_readers/ethernet.rb

@@ -0,0 +1,34 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+require "y2network/network_manager/connection_config_readers/base"
+
+module Y2Network
+  module NetworkManager
+    module ConnectionConfigReaders
+      class Ethernet < Base
+        # @see Y2Network::NetworkManager::ConnectionConfigReaders::Base#update_connection_config
+        def update_connection_config(conn)
+          conn.mtu = file.ethernet["mtu"].to_i if file.ethernet["mtu"]
+        end
+      end
+    end
+  end
+end

src/lib/y2network/network_manager/connection_config_readers/wireless.rb

@@ -0,0 +1,40 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+require "y2network/network_manager/connection_config_readers/base"
+
+module Y2Network
+  module NetworkManager
+    module ConnectionConfigReaders
+      class Wireless < Base
+        # FIXME: (somehow) duplicated in the writer
+        DEFAULT_MODE = "managed".freeze
+        MODE = { "adhoc" => "ad-hoc", "ap" => "master", "infrastructure" => "managed" }.freeze
+
+        # @see Y2Network::NetworkManager::ConnectionConfigReaders::Base#update_connection_config
+        def update_connection_config(conn)
+          conn.mtu = file.wifi["mtu"].to_i if file.wifi["mtu"]
+          conn.mode = MODE[file.wifi["mode"]] || DEFAULT_MODE
+          conn.essid = file.wifi["ssid"]
+        end
+      end
+    end
+  end
+end

src/lib/y2network/network_manager/connection_configs_reader.rb

@@ -0,0 +1,41 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require "yast"
+require "cfa/nm_connection"
+require "y2network/connection_configs_collection"
+require "y2network/network_manager/connection_config_reader"
+
+module Y2Network
+  module NetworkManager
+    # This class reads connection configurations from NetworkManager
+    class ConnectionConfigsReader
+      # Returns the connection configurations from NetworkManager
+      #
+      # @return [Y2Network::ConnectionConfigsCollection]
+      def connections
+        empty_collection = ConnectionConfigsCollection.new
+        CFA::NmConnection.all.each_with_object(empty_collection) do |file, conns|
+          connection = ConnectionConfigReader.new.read(file)
+          conns << connection if connection
+        end
+      end
+    end
+  end
+end