Module: Yast::NetworkServicesDnsInclude

Includes:
UI::TextHelpers
Defined in:
src/include/network/services/dns.rb

Constant Summary collapse

CUSTOM_RESOLV_POLICIES =

CWM wants id-value pairs

{
  "STATIC"          => "STATIC",
  "STATIC_FALLBACK" => "STATIC_FALLBACK"
}.freeze
NONE_LABEL = 
"no".freeze
ANY_LABEL = 
"any".freeze
NO_CHANGE_LABEL = 
"no_change".freeze

Instance Method Summary collapse

Instance Method Details

#config ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 656

def config
  Yast::Lan.yast_config
end

#current_hostname ⇒ String

Convenience method to check the current static hostname

Returns:

  • (String) 

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# File 'src/include/network/services/dns.rb', line 307

def current_hostname
  config&.hostname&.static || ""
end

#dhcp? ⇒ Boolean

Checks if any interface is configured to use DHCP

Returns:

  • (Boolean) —

    true when an interface uses DHCP config


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# File 'src/include/network/services/dns.rb', line 663

def dhcp?
  return false unless config&.connections

  config.connections.any?(&:dhcp?)
end

#DNSMainDialog(_standalone) ⇒ Object

Standalone dialog only - embedded one is handled separately via CWMTab


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# File 'src/include/network/services/dns.rb', line 632

def DNSMainDialog(_standalone)
  caption = _("Hostname and Name Server Configuration")

  functions = {
    "init"  => fun_ref(method(:InitHnWidget), "void (string)"),
    "store" => fun_ref(method(:StoreHnWidget), "void (string, map)"),
    :abort  => fun_ref(method(:ReallyAbort), "boolean ()")
  }

  Wizard.HideBackButton

  ret = CWM.ShowAndRun(
    "widget_descr"       => @widget_descr_dns,
    "contents"           => @dns_contents,
    # dialog caption
    "caption"            => caption,
    "back_button"        => Label.BackButton,
    "next_button"        => Label.FinishButton,
    "fallback_functions" => functions
  )

  ret
end

#handleModifyResolvPolicy(key, _event) ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 577

def handleModifyResolvPolicy(key, _event)
  Builtins.y2milestone(
    "handleModifyResolvPolicy called: %1",
    UI.QueryWidget(Id("MODIFY_RESOLV"), :Value)
  )

  @resolver_modifiable = UI.QueryWidget(Id("MODIFY_RESOLV"), :Value) != :nomodify

  initPolicy(key)

  Builtins.y2milestone(
    "Exit: resolver_modifiable = %1",
    @resolver_modifiable
  )
  nil
end

#handlePolicy(_key, _event) ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 539

def handlePolicy(_key, _event)
  Builtins.y2milestone("handlePolicy")

  case UI.QueryWidget(Id("MODIFY_RESOLV"), :Value)
  when :custom
    SetHnItem("PLAIN_POLICY", UI.QueryWidget(Id("PLAIN_POLICY"), :Value))
  when :auto
    SetHnItem("PLAIN_POLICY", "auto")
  else
    SetHnItem("PLAIN_POLICY", "")
  end

  nil
end

#HandleResolverData(key, _event) ⇒ Object

Event handler for resolver data (nameservers, searchlist) enable or disable: is DHCP available?

Parameters:

  • key (String) —

    the widget receiving the event

  • _event (Hash) —

    the event being handled

Returns:

  • nil so that the dialog loops on


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# File 'src/include/network/services/dns.rb', line 471

def HandleResolverData(key, _event)
  # if this one is disabled, it means NM is in charge (see also initModifyResolvPolicy())
  if Convert.to_boolean(UI.QueryWidget(Id("MODIFY_RESOLV"), :Enabled))
    # thus, we should not re-enable already disabled widgets
    UI.ChangeWidget(Id(key), :Enabled, @resolver_modifiable)
  end
  nil
end

#InitDhcpHostname(_key) ⇒ Object

Init handler for DHCP_HOSTNAME


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# File 'src/include/network/services/dns.rb', line 426

def InitDhcpHostname(_key)
  UI.ChangeWidget(Id("DHCP_HOSTNAME"), :Enabled, dhcp? && config&.backend?(:wicked))
  dhcp_hostname = DNS.dhcp_hostname

  items = [
    # translators: no device selected placeholder
    Item(Id(:none), _("no"), dhcp_hostname == :none),
    # translators: placeholder for "set hostname via any DHCP aware device"
    Item(Id(:any), _("yes: any"), dhcp_hostname == :any)
  ]

  iface_names = config.connections.to_a.select(&:dhcp?).map(&:interface)
  items += iface_names.map do |iface|
    # translators: label is in form yes: <device name>
    Item(Id(iface), format(_("yes: %s"), iface), dhcp_hostname == iface)
  end

  UI.ReplaceWidget(
    Id("dhcp_hostname_method"),
    ComboBox(
      Id("DHCP_HOSTNAME"),
      "",
      items
    )
  )

  log.info("InitDhcpHostname: preselected item = #{dhcp_hostname}")

  nil
end

#InitHnSettings ⇒ Object

Initialize internal state according current system configuration.


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# File 'src/include/network/services/dns.rb', line 343

def InitHnSettings
  @hn_settings = InitSettings()

  nil
end

#InitHnWidget(key) ⇒ Object

Default function to init the value of a widget. Used for push buttons.

Parameters:

  • key (String) —

    id of the widget


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# File 'src/include/network/services/dns.rb', line 399

def InitHnWidget(key)
  value = Ops.get(@hn_settings, key)
  UI.ChangeWidget(Id(key), :Value, value)

  nil
end

#initHostnameGlobal(_key) ⇒ Object

Used in GUI mode - initializes widgets according hn_settings

Parameters:

  • _key (String) —

    ignored


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# File 'src/include/network/services/dns.rb', line 596

def initHostnameGlobal(_key)
  InitHnSettings()

  Builtins.foreach(
    Convert.convert(
      Map.Keys(@hn_settings),
      from: "list",
      to:   "list <string>"
    )
  ) { |key2| InitHnWidget(key2) }
  # disable those if NM is in charge
  disable_unconfigureable_items(
    ["NAMESERVER_1", "NAMESERVER_2", "NAMESERVER_3", "SEARCHLIST_S"],
    false
  )

  nil
end

#initialize_network_services_dns(include_target) ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 35

def initialize_network_services_dns(include_target)
  textdomain "network"

  Yast.import "CWM"
  Yast.import "DNS"
  Yast.import "Hostname"
  Yast.import "IP"
  Yast.import "Label"
  Yast.import "Popup"
  Yast.import "Map"

  Yast.include include_target, "network/routines.rb"
  Yast.include include_target, "network/widgets.rb"
  Yast.include include_target, "network/lan/help.rb"

  # If there's a process modifying resolv.conf, we warn the user before
  # letting him change things that will be overwritten anyway.
  # See also #61000.
  @resolver_modifiable = false

  # original setup, used to determine whether data have been modified
  @settings_orig = {}

  # CWM buffer for both dialogs.  Note that NAMESERVERS and SEARCHLIST
  # are lists and their widgets are suffixed.
  @hn_settings = {}

  # TODO: It would be nice to display also transient hostname here - e.g. that
  # one received from dhcp
  @widget_descr_dns = {
    "HOSTNAME"        => {
      "widget"            => :textentry,
      "label"             => _("Static H&ostname"),
      "opt"               => [],
      "help"              => Ops.get_string(@help, "hostname_global", ""),
      "valid_chars"       => Yast::Hostname.ValidCharsDomain,
      "validate_type"     => :function_no_popup,
      "validate_function" => fun_ref(
        method(:ValidateHostname),
        "boolean (string, map)"
      ),
      # validation error popup
      "validate_help"     => Ops.add(
        _("The hostname is invalid.") + "\n",
        Hostname.ValidHost
      )
    },
    "HOSTNAME_GLOBAL" => {
      "widget" => :empty,
      "init"   => fun_ref(
        method(:initHostnameGlobal),
        "void (string)"
      ),
      "store"  => fun_ref(
        method(:storeHostnameGlobal),
        "void (string, map)"
      )
    },
    "DHCP_HOSTNAME"   => {
      "widget"        => :custom,
      "custom_widget" => HBox(
        Label(_("Set Hostname via DHCP")),
        HSpacing(2),
        ReplacePoint(Id("dhcp_hostname_method"), Empty()),
        ReplacePoint(Id("dh_host_text"), Empty())
      ),
      "init"          => fun_ref(method(:InitDhcpHostname), "void (string)"),
      "store"         => fun_ref(method(:StoreDhcpHostname), "void (string, map)")
    },
    "MODIFY_RESOLV"   => {
      "widget" => :combobox,
      "label"  => _("&Modify DNS Configuration"),
      "opt"    => [:notify],
      "items"  => [
        [:nomodify, _("Only Manually")],
        [:auto, _("Use Default Policy")],
        [:custom, _("Use Custom Policy")]
      ],
      "init"   => fun_ref(method(:initModifyResolvPolicy), "void (string)"),
      "handle" => fun_ref(
        method(:handleModifyResolvPolicy),
        "symbol (string, map)"
      ),
      "help"   => Ops.get_string(@help, "dns_config_policy", "")
    },
    "PLAIN_POLICY"    => {
      "widget" => :combobox,
      "label"  => _("&Custom Policy Rule"),
      "opt"    => [:editable],
      "items"  => CUSTOM_RESOLV_POLICIES.to_a,
      "init"   => fun_ref(method(:initPolicy), "void (string)"),
      "handle" => fun_ref(method(:handlePolicy), "symbol (string, map)"),
      "help"   => ""
    },
    "NAMESERVER_1"    => {
      "widget"            => :textentry,
      "label"             => _("Name Server &1"),
      "opt"               => [],
      "help"              => "",
      # at "SEARCHLIST_S"
      "handle"            => fun_ref(
        method(:HandleResolverData),
        "symbol (string, map)"
      ),
      "valid_chars"       => IP.ValidChars,
      "validate_type"     => :function_no_popup,
      "validate_function" => fun_ref(
        method(:ValidateIP),
        "boolean (string, map)"
      ),
      # validation error popup
      "validate_help"     => _("The IP address of the name server is invalid.") + "\n\n" +
        IP.Valid4 + "\n\n" + IP.Valid6
    },
    # NAMESERVER_2 and NAMESERVER_3 are cloned in the dialog function
    "SEARCHLIST_S"    => {
      "widget"            => :multi_line_edit,
      "label"             => _("Do&main Search"),
      "opt"               => [],
      "help"              => Ops.get_string(@help, "searchlist_s", ""),
      "handle"            => fun_ref(
        method(:HandleResolverData),
        "symbol (string, map)"
      ),
      "validate_type"     => :function,
      "validate_function" => fun_ref(
        method(:ValidateSearchList),
        "boolean (string, map)"
      )
    }
  }

  Ops.set(
    @widget_descr_dns,
    "NAMESERVER_2",
    Ops.get(@widget_descr_dns, "NAMESERVER_1", {})
  )
  Ops.set(
    @widget_descr_dns,
    "NAMESERVER_3",
    Ops.get(@widget_descr_dns, "NAMESERVER_1", {})
  )
  Ops.set(@widget_descr_dns, ["NAMESERVER_2", "label"], _("Name Server &2"))
  Ops.set(@widget_descr_dns, ["NAMESERVER_3", "label"], _("Name Server &3"))

  @dns_contents = VBox(
    VBox(
      HBox(
        "HOSTNAME",
        "HOSTNAME_GLOBAL" # global help, init, store for all dialog
      ),
      VSpacing(0.49),
      VBox(
        Left("DHCP_HOSTNAME")
      )
    ),
    VSpacing(1),
    Left(HBox("MODIFY_RESOLV", HSpacing(1), "PLAIN_POLICY")),
    MarginBox(
      0.49,
      0.49,
      Frame(
        _("Name Servers and Domain Search List"),
        VBox(
          VSquash(
            HBox(
              HWeight(1, VBox("NAMESERVER_1", "NAMESERVER_2", "NAMESERVER_3")),
              HSpacing(1),
              HWeight(1, "SEARCHLIST_S")
            )
          )
        )
      )
    ),
    VStretch()
  )

  @dns_td = {
    "resolv" => {
      "header"       => _("Hostname/DNS"),
      "contents"     => @dns_contents,
      "widget_names" => [
        "HOSTNAME",
        "HOSTNAME_GLOBAL",
        "DOMAIN",
        "DHCP_HOSTNAME",
        "MODIFY_RESOLV",
        "PLAIN_POLICY",
        "NAMESERVER_1",
        "NAMESERVER_2",
        "NAMESERVER_3",
        "SEARCHLIST_S"
      ]
    }
  }
end

#initModifyResolvPolicy(_key) ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 564

def initModifyResolvPolicy(_key)
  Builtins.y2milestone("initModifyResolvPolicy")

  # first initialize correctly
  default = modify_resolv_default

  UI.ChangeWidget(Id("MODIFY_RESOLV"), :Value, default)
  # then disable if needed
  disable_unconfigureable_items(["MODIFY_RESOLV"], false)

  nil
end

#initPolicy(_key) ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 518

def initPolicy(_key)
  # first initialize correctly
  Builtins.y2milestone(
    "initPolicy: %1",
    UI.QueryWidget(Id("MODIFY_RESOLV"), :Value)
  )
  if UI.QueryWidget(Id("MODIFY_RESOLV"), :Value) == :custom
    UI.ChangeWidget(Id("PLAIN_POLICY"), :Enabled, true)
    if UI.QueryWidget(Id("PLAIN_POLICY"), :Value) == ""
      UI.ChangeWidget(Id("PLAIN_POLICY"), :Value, DNS.resolv_conf_policy)
    end
  else
    UI.ChangeWidget(Id("PLAIN_POLICY"), :Value, "")
    UI.ChangeWidget(Id("PLAIN_POLICY"), :Enabled, false)
  end
  # then disable if needed
  disable_unconfigureable_items(["PLAIN_POLICY"], false)

  nil
end

#InitSettings ⇒ Object

Returns initial settings for this dialog in one map, from DNS::.

Returns:

  • initial settings for this dialog in one map, from DNS::


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# File 'src/include/network/services/dns.rb', line 240

def InitSettings
  settings = {
    "HOSTNAME"     => DNS.hostname,
    "PLAIN_POLICY" => DNS.resolv_conf_policy
  }
  # the rest is not so straightforward,
  # because we have list variables but non-list widgets

  # domain search
  searchstring = Builtins.mergestring(DNS.searchlist, "\n")
  # #49094: populate the search list
  # #437759: discard 'site', nobody really wants that pre-set
  if searchstring == "" && Ops.get_string(settings, "DOMAIN", "") != "site"
    searchstring = Ops.get_string(settings, "DOMAIN", "")
  end
  Ops.set(settings, "SEARCHLIST_S", searchstring)
  Ops.set(settings, "NAMESERVER_1", DNS.nameservers[0].to_s)
  Ops.set(settings, "NAMESERVER_2", DNS.nameservers[1].to_s)
  Ops.set(settings, "NAMESERVER_3", DNS.nameservers[2].to_s)

  @settings_orig = deep_copy(settings)

  deep_copy(settings)
end

#modify_resolv_default ⇒ Object 


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# File 'src/include/network/services/dns.rb', line 554

def modify_resolv_default
  if DNS.resolv_conf_policy.nil? || DNS.resolv_conf_policy == ""
    Id(:nomodify)
  elsif DNS.resolv_conf_policy == "auto" || DNS.resolv_conf_policy == "STATIC *"
    Id(:auto)
  else
    Id(:custom)
  end
end

#NonEmpty(l) ⇒ Object

Returns only non-empty items.

Parameters:

  • l (Array<String>) —

    list of strings

Returns:

  • only non-empty items


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# File 'src/include/network/services/dns.rb', line 234

def NonEmpty(l)
  l = deep_copy(l)
  Builtins.filter(l) { |s| s != "" }
end

#SetHnItem(key, value) ⇒ Object

Function for updating actual hostname settings.

Parameters:

  • key (String) —

    for known keys see hn_settings

  • value (Object) —

    value for particular hn_settings key


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# File 'src/include/network/services/dns.rb', line 352

def SetHnItem(key, value)
  Builtins.y2milestone(
    "hn_settings[ \"%1\"] changes '%2' -> '%3'",
    key,
    @hn_settings[key].to_s,
    value
  )
  @hn_settings[key] = value

  nil
end

#SetHostname(value) ⇒ Object

Function for updating actual hostname.


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# File 'src/include/network/services/dns.rb', line 365

def SetHostname(value)
  value = deep_copy(value)
  SetHnItem("HOSTNAME", value)

  nil
end

#SetNameserver1(value) ⇒ Object

Function for updating ip address of first nameserver.


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# File 'src/include/network/services/dns.rb', line 373

def SetNameserver1(value)
  value = deep_copy(value)
  SetHnItem("NAMESERVER_1", value)

  nil
end

#SetNameserver2(value) ⇒ Object

Function for updating ip address of second nameserver.


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# File 'src/include/network/services/dns.rb', line 381

def SetNameserver2(value)
  value = deep_copy(value)
  SetHnItem("NAMESERVER_2", value)

  nil
end

#SetNameserver3(value) ⇒ Object

Function for updating ip address of third nameserver.


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# File 'src/include/network/services/dns.rb', line 389

def SetNameserver3(value)
  value = deep_copy(value)
  SetHnItem("NAMESERVER_3", value)

  nil
end

#store_hostname(value) ⇒ String

Stores user's input from hostname field

Parameters:

  • value (String)

Returns:

  • (String) —

    stored hostname


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# File 'src/include/network/services/dns.rb', line 269

def store_hostname(value)
  hostname = config.hostname
  hostname.static = value
  hostname.installer = value if Stage.initial

  value
end

#StoreDhcpHostname(_key, _event) ⇒ Object

Store handler for DHCP_HOSTNAME


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# File 'src/include/network/services/dns.rb', line 458

def StoreDhcpHostname(_key, _event)
  return if !UI.QueryWidget(Id("DHCP_HOSTNAME"), :Enabled)

  DNS.dhcp_hostname = UI.QueryWidget(Id("DHCP_HOSTNAME"), :Value)

  nil
end

#StoreHnSettings ⇒ Object

Stores actual hostname settings.


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# File 'src/include/network/services/dns.rb', line 336

def StoreHnSettings
  StoreSettings(@hn_settings)

  nil
end

#StoreHnWidget(key, _event) ⇒ Object

Default function to store the value of a widget.

Parameters:

  • key (String) —

    id of the widget

  • _event (Hash) —

    the event being handled


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# File 'src/include/network/services/dns.rb', line 409

def StoreHnWidget(key, _event)
  value = UI.QueryWidget(Id(key), :Value)
  SetHnItem(key, value)

  nil
end

#storeHostnameGlobal(_key, event) ⇒ Object

Used in GUI mode - updates and stores actuall hostname settings according dialog widgets content. It calls store handler for every widget from hn_settings with event as an option.

Parameters:

  • _key (String) —

    ignored

  • event (Hash) —

    user generated event


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# File 'src/include/network/services/dns.rb', line 620

def storeHostnameGlobal(_key, event)
  @hn_settings.keys.each do |key2|
    StoreHnWidget(key2, event) if UI.QueryWidget(Id(key2), :Enabled)
  end

  StoreHnSettings()

  nil
end

#StoreSettings(settings) ⇒ Object

Parameters:

  • settings (Hash) —

    map of settings to be stored to DNS::


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# File 'src/include/network/services/dns.rb', line 278

def StoreSettings(settings)
  settings = deep_copy(settings)
  nameservers = [
    Ops.get_string(settings, "NAMESERVER_1", ""),
    Ops.get_string(settings, "NAMESERVER_2", ""),
    Ops.get_string(settings, "NAMESERVER_3", "")
  ]
  searchlist = Builtins.splitstring(
    Ops.get_string(settings, "SEARCHLIST_S", ""),
    " ,\n\t"
  )

  hostname = settings["HOSTNAME"] || ""
  update_hostname_hosts(hostname)
  store_hostname(hostname)

  valid_nameservers = NonEmpty(nameservers).each_with_object([]) do |ip_str, all|
    all << IPAddr.new(ip_str) if IP.Check(ip_str)
  end
  DNS.nameservers = valid_nameservers
  DNS.searchlist = NonEmpty(searchlist)
  DNS.resolv_conf_policy = settings["PLAIN_POLICY"]

  nil
end

#update_hostname_hosts(hostname) ⇒ Object

Allow to update a connection hostname using the new hostname when the connection hostname was the modified hostname

Parameters:

  • hostname (String) —

    New static hostname


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# File 'src/include/network/services/dns.rb', line 315

def update_hostname_hosts(hostname)
  return false if hostname == current_hostname
  return false if current_hostname.empty?

  conn = config.connections.find { |c| c.hostnames&.include?(current_hostname) }
  return false if !conn

  proposed_hostname = propose_hostname_for(conn, hostname)

  return false if !Popup.YesNo(
    wrap_text(
      format(_("The interface '%s' static IP address is mapped to the hostname '%s'.\n\n" \
            "Would you like to adapt it to '%s'?"),
        conn.name, current_hostname, proposed_hostname)
    )
  )

  conn.hostname = proposed_hostname
end

#use_dhcp_hostname? ⇒ Boolean

Checks whether setting hostname via DHCP is allowed

Returns:

  • (Boolean) 

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# File 'src/include/network/services/dns.rb', line 421

def use_dhcp_hostname?
  UI.QueryWidget(Id("DHCP_HOSTNAME"), :Value) != NONE_LABEL
end

#ValidateHostname(key, _event) ⇒ Boolean

Validator for hostname, no_popup

Parameters:

  • key (String) —

    the widget being validated

  • _event (Hash) —

    the event being handled

Returns:

  • (Boolean) —

    whether the current static hostname is valid or not


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# File 'src/include/network/services/dns.rb', line 484

def ValidateHostname(key, _event)
  value = UI.QueryWidget(Id(key), :Value).to_s

  # 1) empty hostname is allowed - /etc/hostname gets cleared in such case
  # 2) FQDN is allowed
  value.empty? || Hostname.Check(value.tr(".", ""))
end

#ValidateSearchList(key, _event) ⇒ Object

Validator for the search list

Parameters:

  • key (String) —

    the widget being validated

  • _event (Hash) —

    the event being handled

Returns:

  • whether valid


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# File 'src/include/network/services/dns.rb', line 496

def ValidateSearchList(key, _event)
  value = Convert.to_string(UI.QueryWidget(Id(key), :Value))
  sl = NonEmpty(Builtins.splitstring(value, " ,\n\t"))
  error = ""

  sl.each do |s|
    next if Hostname.CheckDomain(s)

    # TRANSLATORS: Popup::Error text
    error = Builtins.sformat(_("The search domain '%1' is invalid."), s) +
      "\n" + Hostname.ValidDomain
    break
  end

  if error != ""
    UI.SetFocus(Id(key))
    Popup.Error(error)
    return false
  end
  true
end