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  • Committer: Björn Påhlsson
  • Date: 2011-08-19 15:18:42 UTC
  • mfrom: (495 trunk)
  • mto: This revision was merged to the branch mainline in revision 497.
  • Revision ID: belorn@fukt.bsnet.se-20110819151842-frluz9oo9v7l9fdz
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plugins.d/mandos-client.xml
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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        "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY COMMANDNAME "mandos-client">
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<!ENTITY TIMESTAMP "2012-06-13">
 
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<!ENTITY TIMESTAMP "2011-08-08">
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<!ENTITY % common SYSTEM "../common.ent">
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%common;
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]>
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        <firstname>Björn</firstname>
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        <surname>Påhlsson</surname>
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        <address>
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          <email>belorn@recompile.se</email>
 
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          <email>belorn@fukt.bsnet.se</email>
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        </address>
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      </author>
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      <author>
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        <firstname>Teddy</firstname>
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        <surname>Hogeborn</surname>
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        <address>
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          <email>teddy@recompile.se</email>
 
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          <email>teddy@fukt.bsnet.se</email>
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        </address>
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      </author>
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    </authorgroup>
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    <copyright>
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      <year>2008</year>
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      <year>2009</year>
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      <year>2012</year>
 
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      <year>2011</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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        ><replaceable>PORT</replaceable></option></arg>
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      </group>
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      <sbr/>
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      <group rep='repeat'>
 
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      <group>
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        <arg choice="plain"><option>--interface
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        <replaceable>NAME</replaceable><arg rep='repeat'
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        >,<replaceable>NAME</replaceable></arg></option></arg>
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        <arg choice="plain"><option>-i <replaceable>NAME</replaceable
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        ><arg rep='repeat'>,<replaceable>NAME</replaceable></arg
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        ></option></arg>
 
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        <replaceable>NAME</replaceable></option></arg>
 
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        <arg choice="plain"><option>-i
 
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        <replaceable>NAME</replaceable></option></arg>
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      </group>
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      <sbr/>
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      <group>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--network-hook-dir
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        <replaceable>DIR</replaceable></option>
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      </arg>
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      <sbr/>
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      <arg>
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        <option>--debug</option>
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      </arg>
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    </cmdsynopsis>
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      communicates with <citerefentry><refentrytitle
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      >mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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      to get a password.  In slightly more detail, this client program
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      brings up network interfaces, uses the interfaces’ IPv6
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      link-local addresses to get network connectivity, uses Zeroconf
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      to find servers on the local network, and communicates with
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      servers using TLS with an OpenPGP key to ensure authenticity and
 
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      brings up a network interface, uses the interface’s IPv6
 
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      link-local address to get network connectivity, uses Zeroconf to
 
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      find servers on the local network, and communicates with servers
 
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      using TLS with an OpenPGP key to ensure authenticity and
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      confidentiality.  This client program keeps running, trying all
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      servers on the network, until it receives a satisfactory reply
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      or a TERM signal.  After all servers have been tried, all
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      will wait indefinitely for new servers to appear.
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    </para>
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    <para>
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      The network interfaces are selected like this: If any interfaces
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      are specified using the <option>--interface</option> option,
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      those interface are used.  Otherwise,
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      <command>&COMMANDNAME;</command> will use all interfaces that
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      are not loopback interfaces, are not point-to-point interfaces,
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      are capable of broadcasting and do not have the NOARP flag (see
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      <citerefentry><refentrytitle>netdevice</refentrytitle>
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      <manvolnum>7</manvolnum></citerefentry>).  (If the
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      <option>--connect</option> option is used, point-to-point
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      interfaces and non-broadcast interfaces are accepted.)  If any
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      used interfaces are not up and running, they are first taken up
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      (and later taken down again on program exit).
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    </para>
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    <para>
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      Before network interfaces are selected, all <quote>network
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      hooks</quote> are run; see <xref linkend="network-hooks"/>.
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    </para>
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    <para>
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      This program is not meant to be run directly; it is really meant
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      to run as a plugin of the <application>Mandos</application>
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      <citerefentry><refentrytitle>plugin-runner</refentrytitle>
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        <replaceable>NAME</replaceable></option></term>
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        <listitem>
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          <para>
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            Comma separated list of network interfaces that will be
235
 
            brought up and scanned for Mandos servers to connect to.
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            The default is the empty string, which will automatically
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            use all appropriate interfaces.
 
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            Network interface that will be brought up and scanned for
 
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            Mandos servers to connect to.  The default is the empty
 
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            string, which will automatically choose an appropriate
 
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            interface.
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          </para>
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          <para>
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            If the <option>--connect</option> option is used, this
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            Note that since this program will normally run in the
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            initial RAM disk environment, the interface must be an
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            interface which exists at that stage.  Thus, the interface
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            can normally not be a pseudo-interface such as
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            <quote>br0</quote> or <quote>tun0</quote>; such interfaces
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            will not exist until much later in the boot process, and
251
 
            can not be used by this program, unless created by a
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            <quote>network hook</quote> — see <xref
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            linkend="network-hooks"/>.
 
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            can not be a pseudo-interface such as <quote>br0</quote>
 
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            or <quote>tun0</quote>; such interfaces will not exist
 
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            until much later in the boot process, and can not be used
 
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            by this program.
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          </para>
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          <para>
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            <replaceable>NAME</replaceable> can be the string
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        >SECONDS</replaceable></option></term>
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        <listitem>
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          <para>
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            After bringing a network interface up, the program waits
 
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            After bringing the network interface up, the program waits
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            for the interface to arrive in a <quote>running</quote>
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            state before proceeding.  During this time, the kernel log
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            level will be lowered to reduce clutter on the system
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
343
 
        <term><option>--network-hook-dir=<replaceable
344
 
        >DIR</replaceable></option></term>
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        <listitem>
346
 
          <para>
347
 
            Network hook directory.  The default directory is
348
 
            <quote><filename class="directory"
349
 
            >/lib/mandos/network-hooks.d</filename></quote>.
350
 
          </para>
351
 
        </listitem>
352
 
      </varlistentry>
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      <varlistentry>
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        <term><option>--debug</option></term>
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      <refentrytitle>plugin-runner</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>) is used to run
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      both this program and others in in parallel,
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      <emphasis>one</emphasis> of which (<citerefentry>
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      <refentrytitle>password-prompt</refentrytitle>
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      <manvolnum>8mandos</manvolnum></citerefentry>) will prompt for
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      passwords on the system console.
 
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      <emphasis>one</emphasis> of which will prompt for passwords on
 
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      the system console.
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    </para>
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  </refsect1>
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    </para>
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  </refsect1>
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  <refsect1 id="network-hooks">
450
 
    <title>NETWORK HOOKS</title>
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    <para>
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      If a network interface like a bridge or tunnel is required to
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      find a Mandos server, this requires the interface to be up and
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      running before <command>&COMMANDNAME;</command> starts looking
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      for Mandos servers.  This can be accomplished by creating a
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      <quote>network hook</quote> program, and placing it in a special
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      directory.
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    </para>
459
 
    <para>
460
 
      Before the network is used (and again before program exit), any
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      runnable programs found in the network hook directory are run
462
 
      with the argument <quote><literal>start</literal></quote> or
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      <quote><literal>stop</literal></quote>.  This should bring up or
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      down, respectively, any network interface which
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      <command>&COMMANDNAME;</command> should use.
466
 
    </para>
467
 
    <refsect2 id="hook-requirements">
468
 
      <title>REQUIREMENTS</title>
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      <para>
470
 
        A network hook must be an executable file, and its name must
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        consist entirely of upper and lower case letters, digits,
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        underscores, periods, and hyphens.
473
 
      </para>
474
 
      <para>
475
 
        A network hook will receive one argument, which can be one of
476
 
        the following:
477
 
      </para>
478
 
      <variablelist>
479
 
        <varlistentry>
480
 
          <term><literal>start</literal></term>
481
 
          <listitem>
482
 
            <para>
483
 
              This should make the network hook create (if necessary)
484
 
              and bring up a network interface.
485
 
            </para>
486
 
          </listitem>
487
 
        </varlistentry>
488
 
        <varlistentry>
489
 
          <term><literal>stop</literal></term>
490
 
          <listitem>
491
 
            <para>
492
 
              This should make the network hook take down a network
493
 
              interface, and delete it if it did not exist previously.
494
 
            </para>
495
 
          </listitem>
496
 
        </varlistentry>
497
 
        <varlistentry>
498
 
          <term><literal>files</literal></term>
499
 
          <listitem>
500
 
            <para>
501
 
              This should make the network hook print, <emphasis>one
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              file per line</emphasis>, all the files needed for it to
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              run.  (These files will be copied into the initial RAM
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              filesystem.)  Typical use is for a network hook which is
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              a shell script to print its needed binaries.
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            </para>
507
 
            <para>
508
 
              It is not necessary to print any non-executable files
509
 
              already in the network hook directory, these will be
510
 
              copied implicitly if they otherwise satisfy the name
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              requirement.
512
 
            </para>
513
 
          </listitem>
514
 
        </varlistentry>
515
 
        <varlistentry>
516
 
          <term><literal>modules</literal></term>
517
 
          <listitem>
518
 
            <para>
519
 
              This should make the network hook print, <emphasis>on
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              separate lines</emphasis>, all the kernel modules needed
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              for it to run.  (These modules will be copied into the
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              initial RAM filesystem.)  For instance, a tunnel
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              interface needs the
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              <quote><literal>tun</literal></quote> module.
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            </para>
526
 
          </listitem>
527
 
        </varlistentry>
528
 
      </variablelist>
529
 
      <para>
530
 
        The network hook will be provided with a number of environment
531
 
        variables:
532
 
      </para>
533
 
      <variablelist>
534
 
        <varlistentry>
535
 
          <term><envar>MANDOSNETHOOKDIR</envar></term>
536
 
          <listitem>
537
 
            <para>
538
 
              The network hook directory, specified to
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              <command>&COMMANDNAME;</command> by the
540
 
              <option>--network-hook-dir</option> option.  Note: this
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              should <emphasis>always</emphasis> be used by the
542
 
              network hook to refer to itself or any files in the hook
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              directory it may require.
544
 
            </para>
545
 
          </listitem>
546
 
        </varlistentry>
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        <varlistentry>
548
 
          <term><envar>DEVICE</envar></term>
549
 
          <listitem>
550
 
            <para>
551
 
              The network interfaces, as specified to
552
 
              <command>&COMMANDNAME;</command> by the
553
 
              <option>--interface</option> option, combined to one
554
 
              string and separated by commas.  If this is set, and
555
 
              does not contain the interface a hook will bring up,
556
 
              there is no reason for a hook to continue.
557
 
            </para>
558
 
          </listitem>
559
 
        </varlistentry>
560
 
        <varlistentry>
561
 
          <term><envar>MODE</envar></term>
562
 
          <listitem>
563
 
            <para>
564
 
              This will be the same as the first argument;
565
 
              i.e. <quote><literal>start</literal></quote>,
566
 
              <quote><literal>stop</literal></quote>,
567
 
              <quote><literal>files</literal></quote>, or
568
 
              <quote><literal>modules</literal></quote>.
569
 
            </para>
570
 
          </listitem>
571
 
        </varlistentry>
572
 
        <varlistentry>
573
 
          <term><envar>VERBOSITY</envar></term>
574
 
          <listitem>
575
 
            <para>
576
 
              This will be the <quote><literal>1</literal></quote> if
577
 
              the <option>--debug</option> option is passed to
578
 
              <command>&COMMANDNAME;</command>, otherwise
579
 
              <quote><literal>0</literal></quote>.
580
 
            </para>
581
 
          </listitem>
582
 
        </varlistentry>
583
 
        <varlistentry>
584
 
          <term><envar>DELAY</envar></term>
585
 
          <listitem>
586
 
            <para>
587
 
              This will be the same as the <option>--delay</option>
588
 
              option passed to <command>&COMMANDNAME;</command>.  Is
589
 
              only set if <envar>MODE</envar> is
590
 
              <quote><literal>start</literal></quote> or
591
 
              <quote><literal>stop</literal></quote>.
592
 
            </para>
593
 
          </listitem>
594
 
        </varlistentry>
595
 
        <varlistentry>
596
 
          <term><envar>CONNECT</envar></term>
597
 
          <listitem>
598
 
            <para>
599
 
              This will be the same as the <option>--connect</option>
600
 
              option passed to <command>&COMMANDNAME;</command>.  Is
601
 
              only set if <option>--connect</option> is passed and
602
 
              <envar>MODE</envar> is
603
 
              <quote><literal>start</literal></quote> or
604
 
              <quote><literal>stop</literal></quote>.
605
 
            </para>
606
 
          </listitem>
607
 
        </varlistentry>
608
 
      </variablelist>
609
 
      <para>
610
 
        A hook may not read from standard input, and should be
611
 
        restrictive in printing to standard output or standard error
612
 
        unless <varname>VERBOSITY</varname> is
613
 
        <quote><literal>1</literal></quote>.
614
 
      </para>
615
 
    </refsect2>
616
 
  </refsect1>
617
 
  
618
408
  <refsect1 id="files">
619
409
    <title>FILES</title>
620
410
    <variablelist>
632
422
          </para>
633
423
        </listitem>
634
424
      </varlistentry>
635
 
      <varlistentry>
636
 
        <term><filename
637
 
        class="directory">/lib/mandos/network-hooks.d</filename></term>
638
 
        <listitem>
639
 
          <para>
640
 
            Directory where network hooks are located.  Change this
641
 
            with the <option>--network-hook-dir</option> option.  See
642
 
            <xref linkend="network-hooks"/>.
643
 
          </para>
644
 
        </listitem>
645
 
      </varlistentry>
646
425
    </variablelist>
647
426
  </refsect1>
648
427
  
663
442
    <informalexample>
664
443
      <para>
665
444
        Normal invocation needs no options, if the network interface
666
 
        can be automatically determined:
 
445
        is <quote>eth0</quote>:
667
446
      </para>
668
447
      <para>
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448
        <userinput>&COMMANDNAME;</userinput>