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140
communicates with <citerefentry><refentrytitle
128
141
>mandos</refentrytitle><manvolnum>8</manvolnum></citerefentry>
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142
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
143
brings up network interfaces, uses the interfaces’ IPv6
144
link-local addresses to get network connectivity, uses Zeroconf
145
to find servers on the local network, and communicates with
146
servers using TLS with an OpenPGP key to ensure authenticity and
134
147
confidentiality. This client program keeps running, trying all
135
148
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
149
or a TERM signal. After all servers have been tried, all
150
servers are periodically retried. If no servers are found it
151
will wait indefinitely for new servers to appear.
154
The network interfaces are selected like this: If any interfaces
155
are specified using the <option>--interface</option> option,
156
those interface are used. Otherwise,
157
<command>&COMMANDNAME;</command> will use all interfaces that
158
are not loopback interfaces, are not point-to-point interfaces,
159
are capable of broadcasting and do not have the NOARP flag (see
160
<citerefentry><refentrytitle>netdevice</refentrytitle>
161
<manvolnum>7</manvolnum></citerefentry>). (If the
162
<option>--connect</option> option is used, point-to-point
163
interfaces and non-broadcast interfaces are accepted.) If any
164
used interfaces are not up and running, they are first taken up
165
(and later taken down again on program exit).
168
Before network interfaces are selected, all <quote>network
169
hooks</quote> are run; see <xref linkend="network-hooks"/>.
141
172
This program is not meant to be run directly; it is really meant
188
219
assumed to separate the address from the port number.
191
This option is normally only useful for testing and
222
Normally, Zeroconf would be used to locate Mandos servers,
223
in which case this option would only be used when testing
198
<term><option>--interface=
199
<replaceable>NAME</replaceable></option></term>
230
<term><option>--interface=<replaceable
231
>NAME</replaceable><arg rep='repeat'>,<replaceable
232
>NAME</replaceable></arg></option></term>
201
<replaceable>NAME</replaceable></option></term>
234
<replaceable>NAME</replaceable><arg rep='repeat'>,<replaceable
235
>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>.
238
Comma separated list of network interfaces that will be
239
brought up and scanned for Mandos servers to connect to.
240
The default is the empty string, which will automatically
241
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
244
If the <option>--connect</option> option is used, and
245
exactly one interface name is specified (except
246
<quote><literal>none</literal></quote>), this specifies
247
the interface to use to connect to the address given.
214
250
Note that since this program will normally run in the
215
251
initial RAM disk environment, the interface must be an
216
252
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
253
can normally not be a pseudo-interface such as
254
<quote>br0</quote> or <quote>tun0</quote>; such interfaces
255
will not exist until much later in the boot process, and
256
can not be used by this program, unless created by a
257
<quote>network hook</quote> — see <xref
258
linkend="network-hooks"/>.
261
<replaceable>NAME</replaceable> can be the string
262
<quote><literal>none</literal></quote>; this will make
263
<command>&COMMANDNAME;</command> not bring up
264
<emphasis>any</emphasis> interfaces specified
265
<emphasis>after</emphasis> this string. This is not
266
recommended, and only meant for advanced users.
455
<refsect1 id="network-hooks">
456
<title>NETWORK HOOKS</title>
458
If a network interface like a bridge or tunnel is required to
459
find a Mandos server, this requires the interface to be up and
460
running before <command>&COMMANDNAME;</command> starts looking
461
for Mandos servers. This can be accomplished by creating a
462
<quote>network hook</quote> program, and placing it in a special
466
Before the network is used (and again before program exit), any
467
runnable programs found in the network hook directory are run
468
with the argument <quote><literal>start</literal></quote> or
469
<quote><literal>stop</literal></quote>. This should bring up or
470
down, respectively, any network interface which
471
<command>&COMMANDNAME;</command> should use.
473
<refsect2 id="hook-requirements">
474
<title>REQUIREMENTS</title>
476
A network hook must be an executable file, and its name must
477
consist entirely of upper and lower case letters, digits,
478
underscores, periods, and hyphens.
481
A network hook will receive one argument, which can be one of
486
<term><literal>start</literal></term>
489
This should make the network hook create (if necessary)
490
and bring up a network interface.
495
<term><literal>stop</literal></term>
498
This should make the network hook take down a network
499
interface, and delete it if it did not exist previously.
504
<term><literal>files</literal></term>
507
This should make the network hook print, <emphasis>one
508
file per line</emphasis>, all the files needed for it to
509
run. (These files will be copied into the initial RAM
510
filesystem.) Typical use is for a network hook which is
511
a shell script to print its needed binaries.
514
It is not necessary to print any non-executable files
515
already in the network hook directory, these will be
516
copied implicitly if they otherwise satisfy the name
522
<term><literal>modules</literal></term>
525
This should make the network hook print, <emphasis>on
526
separate lines</emphasis>, all the kernel modules needed
527
for it to run. (These modules will be copied into the
528
initial RAM filesystem.) For instance, a tunnel
530
<quote><literal>tun</literal></quote> module.
536
The network hook will be provided with a number of environment
541
<term><envar>MANDOSNETHOOKDIR</envar></term>
544
The network hook directory, specified to
545
<command>&COMMANDNAME;</command> by the
546
<option>--network-hook-dir</option> option. Note: this
547
should <emphasis>always</emphasis> be used by the
548
network hook to refer to itself or any files in the hook
549
directory it may require.
554
<term><envar>DEVICE</envar></term>
557
The network interfaces, as specified to
558
<command>&COMMANDNAME;</command> by the
559
<option>--interface</option> option, combined to one
560
string and separated by commas. If this is set, and
561
does not contain the interface a hook will bring up,
562
there is no reason for a hook to continue.
567
<term><envar>MODE</envar></term>
570
This will be the same as the first argument;
571
i.e. <quote><literal>start</literal></quote>,
572
<quote><literal>stop</literal></quote>,
573
<quote><literal>files</literal></quote>, or
574
<quote><literal>modules</literal></quote>.
579
<term><envar>VERBOSITY</envar></term>
582
This will be the <quote><literal>1</literal></quote> if
583
the <option>--debug</option> option is passed to
584
<command>&COMMANDNAME;</command>, otherwise
585
<quote><literal>0</literal></quote>.
590
<term><envar>DELAY</envar></term>
593
This will be the same as the <option>--delay</option>
594
option passed to <command>&COMMANDNAME;</command>. Is
595
only set if <envar>MODE</envar> is
596
<quote><literal>start</literal></quote> or
597
<quote><literal>stop</literal></quote>.
602
<term><envar>CONNECT</envar></term>
605
This will be the same as the <option>--connect</option>
606
option passed to <command>&COMMANDNAME;</command>. Is
607
only set if <option>--connect</option> is passed and
608
<envar>MODE</envar> is
609
<quote><literal>start</literal></quote> or
610
<quote><literal>stop</literal></quote>.
616
A hook may not read from standard input, and should be
617
restrictive in printing to standard output or standard error
618
unless <varname>VERBOSITY</varname> is
619
<quote><literal>1</literal></quote>.
382
624
<refsect1 id="files">
383
625
<title>FILES</title>