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139
communicates with <citerefentry><refentrytitle
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140
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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141
to get a password. In slightly more detail, this client program
130
brings up a network interface, uses the interface’s IPv6
131
link-local address to get network connectivity, uses Zeroconf to
132
find servers on the local network, and communicates with servers
133
using TLS with an OpenPGP key to ensure authenticity and
142
brings up network interfaces, uses the interfaces’ IPv6
143
link-local addresses to get network connectivity, uses Zeroconf
144
to find servers on the local network, and communicates with
145
servers using TLS with an OpenPGP key to ensure authenticity and
134
146
confidentiality. This client program keeps running, trying all
135
147
servers on the network, until it receives a satisfactory reply
136
or a TERM signal is received. If no servers are found, or after
137
all servers have been tried, it waits indefinitely for new
148
or a TERM signal. After all servers have been tried, all
149
servers are periodically retried. If no servers are found it
150
will wait indefinitely for new servers to appear.
153
The network interfaces are selected like this: If any interfaces
154
are specified using the <option>--interface</option> option,
155
those interface are used. Otherwise,
156
<command>&COMMANDNAME;</command> will use all interfaces that
157
are not loopback interfaces, are not point-to-point interfaces,
158
are capable of broadcasting and do not have the NOARP flag (see
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<citerefentry><refentrytitle>netdevice</refentrytitle>
160
<manvolnum>7</manvolnum></citerefentry>). (If the
161
<option>--connect</option> option is used, point-to-point
162
interfaces and non-broadcast interfaces are accepted.) If any
163
used interfaces are not up and running, they are first taken up
164
(and later taken down again on program exit).
167
Before network interfaces are selected, all <quote>network
168
hooks</quote> are run; see <xref linkend="network-hooks"/>.
141
171
This program is not meant to be run directly; it is really meant
198
<term><option>--interface=
199
<replaceable>NAME</replaceable></option></term>
228
<term><option>--interface=<replaceable
229
>NAME</replaceable><arg rep='repeat'>,<replaceable
230
>NAME</replaceable></arg></option></term>
201
<replaceable>NAME</replaceable></option></term>
232
<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
233
>NAME</replaceable></arg></option></term>
204
Network interface that will be brought up and scanned for
205
Mandos servers to connect to. The default it
206
<quote><literal>eth0</literal></quote>.
236
Comma separated list of network interfaces that will be
237
brought up and scanned for Mandos servers to connect to.
238
The default is the empty string, which will automatically
239
use all appropriate interfaces.
209
If the <option>--connect</option> option is used, this
210
specifies the interface to use to connect to the address
242
If the <option>--connect</option> option is used, and
243
exactly one interface name is specified (except
244
<quote><literal>none</literal></quote>), this specifies
245
the interface to use to connect to the address given.
214
248
Note that since this program will normally run in the
215
249
initial RAM disk environment, the interface must be an
216
250
interface which exists at that stage. Thus, the interface
217
can not be a pseudo-interface such as <quote>br0</quote>
218
or <quote>tun0</quote>; such interfaces will not exist
219
until much later in the boot process, and can not be used
251
can normally not be a pseudo-interface such as
252
<quote>br0</quote> or <quote>tun0</quote>; such interfaces
253
will not exist until much later in the boot process, and
254
can not be used by this program, unless created by a
255
<quote>network hook</quote> — see <xref
256
linkend="network-hooks"/>.
259
<replaceable>NAME</replaceable> can be the string
260
<quote><literal>none</literal></quote>; this will make
261
<command>&COMMANDNAME;</command> not bring up
262
<emphasis>any</emphasis> interfaces specified
263
<emphasis>after</emphasis> this string. This is not
264
recommended, and only meant for advanced users.
453
<refsect1 id="network-hooks">
454
<title>NETWORK HOOKS</title>
456
If a network interface like a bridge or tunnel is required to
457
find a Mandos server, this requires the interface to be up and
458
running before <command>&COMMANDNAME;</command> starts looking
459
for Mandos servers. This can be accomplished by creating a
460
<quote>network hook</quote> program, and placing it in a special
464
Before the network is used (and again before program exit), any
465
runnable programs found in the network hook directory are run
466
with the argument <quote><literal>start</literal></quote> or
467
<quote><literal>stop</literal></quote>. This should bring up or
468
down, respectively, any network interface which
469
<command>&COMMANDNAME;</command> should use.
471
<refsect2 id="hook-requirements">
472
<title>REQUIREMENTS</title>
474
A network hook must be an executable file, and its name must
475
consist entirely of upper and lower case letters, digits,
476
underscores, periods, and hyphens.
479
A network hook will receive one argument, which can be one of
484
<term><literal>start</literal></term>
487
This should make the network hook create (if necessary)
488
and bring up a network interface.
493
<term><literal>stop</literal></term>
496
This should make the network hook take down a network
497
interface, and delete it if it did not exist previously.
502
<term><literal>files</literal></term>
505
This should make the network hook print, <emphasis>one
506
file per line</emphasis>, all the files needed for it to
507
run. (These files will be copied into the initial RAM
508
filesystem.) Typical use is for a network hook which is
509
a shell script to print its needed binaries.
512
It is not necessary to print any non-executable files
513
already in the network hook directory, these will be
514
copied implicitly if they otherwise satisfy the name
520
<term><literal>modules</literal></term>
523
This should make the network hook print, <emphasis>on
524
separate lines</emphasis>, all the kernel modules needed
525
for it to run. (These modules will be copied into the
526
initial RAM filesystem.) For instance, a tunnel
528
<quote><literal>tun</literal></quote> module.
534
The network hook will be provided with a number of environment
539
<term><envar>MANDOSNETHOOKDIR</envar></term>
542
The network hook directory, specified to
543
<command>&COMMANDNAME;</command> by the
544
<option>--network-hook-dir</option> option. Note: this
545
should <emphasis>always</emphasis> be used by the
546
network hook to refer to itself or any files in the hook
547
directory it may require.
552
<term><envar>DEVICE</envar></term>
555
The network interfaces, as specified to
556
<command>&COMMANDNAME;</command> by the
557
<option>--interface</option> option, combined to one
558
string and separated by commas. If this is set, and
559
does not contain the interface a hook will bring up,
560
there is no reason for a hook to continue.
565
<term><envar>MODE</envar></term>
568
This will be the same as the first argument;
569
i.e. <quote><literal>start</literal></quote>,
570
<quote><literal>stop</literal></quote>,
571
<quote><literal>files</literal></quote>, or
572
<quote><literal>modules</literal></quote>.
577
<term><envar>VERBOSITY</envar></term>
580
This will be the <quote><literal>1</literal></quote> if
581
the <option>--debug</option> option is passed to
582
<command>&COMMANDNAME;</command>, otherwise
583
<quote><literal>0</literal></quote>.
588
<term><envar>DELAY</envar></term>
591
This will be the same as the <option>--delay</option>
592
option passed to <command>&COMMANDNAME;</command>. Is
593
only set if <envar>MODE</envar> is
594
<quote><literal>start</literal></quote> or
595
<quote><literal>stop</literal></quote>.
600
<term><envar>CONNECT</envar></term>
603
This will be the same as the <option>--connect</option>
604
option passed to <command>&COMMANDNAME;</command>. Is
605
only set if <option>--connect</option> is passed and
606
<envar>MODE</envar> is
607
<quote><literal>start</literal></quote> or
608
<quote><literal>stop</literal></quote>.
614
A hook may not read from standard input, and should be
615
restrictive in printing to standard output or standard error
616
unless <varname>VERBOSITY</varname> is
617
<quote><literal>1</literal></quote>.
382
622
<refsect1 id="files">
383
623
<title>FILES</title>