source: networking/netprogs/wpa_supplicant.xml@ 822cc4a6

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Last change on this file since 822cc4a6 was 822cc4a6, checked in by Bruce Dubbs <bdubbs@…>, 8 years ago

Update to nfs-utils-1.3.4.
Update wpa service script.
Update wpa_supplicant configuration intormation.
Fix some md5sums and a url.

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17630 af4574ff-66df-0310-9fd7-8a98e5e911e0
  • Property mode set to 100644
File size: 21.5 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7 <!ENTITY wpa_supplicant-download-http
8 "http://hostap.epitest.fi/releases/wpa_supplicant-&wpa_supplicant-version;.tar.gz">
9 <!ENTITY wpa_supplicant-download-ftp " ">
10 <!ENTITY wpa_supplicant-md5sum "96ff75c3a514f1f324560a2376f13110">
11 <!ENTITY wpa_supplicant-size "2.5 MB">
12 <!ENTITY wpa_supplicant-buildsize "31 MB">
13 <!ENTITY wpa_supplicant-time "0.4 SBU (includes optional gui)">
14]>
15
16<sect1 id="wpa_supplicant" xreflabel="wpa_supplicant-&wpa_supplicant-version;">
17 <?dbhtml filename="wpa_supplicant.html"?>
18
19 <sect1info>
20 <othername>$LastChangedBy$</othername>
21 <date>$Date$</date>
22 </sect1info>
23
24 <title>wpa_supplicant-&wpa_supplicant-version;</title>
25
26 <indexterm zone="wpa_supplicant">
27 <primary sortas="a-wpa_supplicant">wpa_supplicant</primary>
28 </indexterm>
29
30 <sect2 role="package">
31 <title>Introduction to WPA Supplicant</title>
32
33 <para>
34 <application>WPA Supplicant</application> is a Wi-Fi Protected Access
35 (WPA) client and IEEE 802.1X supplicant. It implements WPA key negotiation
36 with a WPA Authenticator and Extensible Authentication Protocol (EAP)
37 authentication with an Authentication Server. In addition, it controls the
38 roaming and IEEE 802.11 authentication/association of the wireless LAN
39 driver. This is useful for connecting to a password protected wireless
40 access point.
41 </para>
42
43 &lfs79_checked;&gcc6_checked;
44
45 <bridgehead renderas="sect3">Package Information</bridgehead>
46 <itemizedlist spacing="compact">
47 <listitem>
48 <para>
49 Download (HTTP): <ulink url="&wpa_supplicant-download-http;"/>
50 </para>
51 </listitem>
52 <listitem>
53 <para>
54 Download (FTP): <ulink url="&wpa_supplicant-download-ftp;"/>
55 </para>
56 </listitem>
57 <listitem>
58 <para>
59 Download MD5 sum: &wpa_supplicant-md5sum;
60 </para>
61 </listitem>
62 <listitem>
63 <para>
64 Download size: &wpa_supplicant-size;
65 </para>
66 </listitem>
67 <listitem>
68 <para>
69 Estimated disk space required: &wpa_supplicant-buildsize;
70 </para>
71 </listitem>
72 <listitem>
73 <para>
74 Estimated build time: &wpa_supplicant-time;
75 </para>
76 </listitem>
77 </itemizedlist>
78
79 <bridgehead renderas="sect3">WPA Supplicant Dependencies</bridgehead>
80
81 <bridgehead renderas="sect4">Recommended</bridgehead>
82 <para role="recommended">
83 <xref linkend="libnl"/> and
84 <xref linkend="openssl"/>
85 </para>
86
87 <bridgehead renderas="sect4">Optional</bridgehead>
88 <para role="optional">
89 <xref linkend="dbus"/>,
90 <xref linkend="libxml2"/>, and
91 <xref linkend="qt5"/>
92 </para>
93
94 <para condition="html" role="usernotes">User Notes:
95 <ulink url="&blfs-wiki;/wpa_supplicant"/>
96 </para>
97
98 </sect2>
99
100 <sect2 role="kernel" id="wpa_supplicant-kernel">
101 <title>Kernel Configuration</title>
102
103 <para>
104 Enable the following options in the kernel configuration as well as
105 specific device drivers for your hardware and recompile the kernel if
106 necessary:
107 </para>
108
109<screen><literal>[*] Networking support ---&gt; [CONFIG_NET]
110 [*] Wireless ---&gt; [CONFIG_WIRELESS]
111 &lt;*/M&gt; cfg80211 - wireless configuration API [CONFIG_CFG80211]
112 [*] cfg80211 wireless extensions compatibility [CONFIG_CFG80211_WEXT]
113 &lt;*/M&gt; Generic IEEE 802.11 Networking Stack (mac80211) [CONFIG_MAC80211]
114Device Drivers ---&gt;
115 [*] Network device support ---&gt; [CONFIG_NETDEVICES]
116 [*] Wireless LAN ---&gt; [CONFIG_WLAN]</literal></screen>
117
118 <para>
119 Open the submenu and select the options that support your hardware:
120 <command>lspci</command> from <xref linkend="pciutils"/> can be used to
121 view your hardware configuration.
122 </para>
123
124 <indexterm zone="wpa_supplicant wpa_supplicant-kernel">
125 <primary sortas="d-wpa_supplicant">wpa_supplicant</primary>
126 </indexterm>
127 </sect2>
128
129 <sect2 role="installation">
130 <title>Installation of WPA Supplicant</title>
131
132 <para>
133 First you will need to create an initial configuration file for the
134 build process. You can read <filename>wpa_supplicant/README</filename>
135 and <filename>wpa_supplicant/defconfig</filename> for the explanation
136 of the following options as well as other options that can be used.
137 Create a build configuration file that should work for standard WiFi
138 setups by running the following command:
139 </para>
140
141<screen><userinput>cat &gt; wpa_supplicant/.config &lt;&lt; "EOF"
142<literal>CONFIG_BACKEND=file
143CONFIG_CTRL_IFACE=y
144CONFIG_DEBUG_FILE=y
145CONFIG_DEBUG_SYSLOG=y
146CONFIG_DEBUG_SYSLOG_FACILITY=LOG_DAEMON
147CONFIG_DRIVER_NL80211=y
148CONFIG_DRIVER_WEXT=y
149CONFIG_DRIVER_WIRED=y
150CONFIG_EAP_GTC=y
151CONFIG_EAP_LEAP=y
152CONFIG_EAP_MD5=y
153CONFIG_EAP_MSCHAPV2=y
154CONFIG_EAP_OTP=y
155CONFIG_EAP_PEAP=y
156CONFIG_EAP_TLS=y
157CONFIG_EAP_TTLS=y
158CONFIG_IEEE8021X_EAPOL=y
159CONFIG_IPV6=y
160CONFIG_LIBNL32=y
161CONFIG_PEERKEY=y
162CONFIG_PKCS12=y
163CONFIG_READLINE=y
164CONFIG_SMARTCARD=y
165CONFIG_WPS=y
166CFLAGS += -I/usr/include/libnl3</literal>
167EOF</userinput></screen>
168
169 <para>
170 If you wish to use <application>WPA Supplicant</application> with
171 <xref linkend="NetworkManager"/>, make sure that you have installed
172 <xref linkend="dbus"/> and <xref linkend="libxml2"/>, then add the
173 following options to the <application>WPA Supplicant</application>
174 build configuration file by running the following command:
175 </para>
176
177<screen><userinput>cat &gt;&gt; wpa_supplicant/.config &lt;&lt; "EOF"
178<literal>CONFIG_CTRL_IFACE_DBUS=y
179CONFIG_CTRL_IFACE_DBUS_NEW=y
180CONFIG_CTRL_IFACE_DBUS_INTRO=y</literal>
181EOF</userinput></screen>
182
183 <para>
184 Install <application>WPA Supplicant</application> by running the
185 following commands:
186 </para>
187
188<screen><userinput>cd wpa_supplicant &amp;&amp;
189make BINDIR=/sbin LIBDIR=/lib</userinput></screen>
190
191 <para>
192 If you have installed <xref linkend="qt5"/> and wish to build
193 the <application>WPA Supplicant</application> GUI program, run
194 the following commands:
195 </para>
196
197 <note><para>The following directory name is labelled qt4, but
198 is compatible with <xref linkend="qt5"/>.</para></note>
199
200<screen><userinput>pushd wpa_gui-qt4 &amp;&amp;
201qmake wpa_gui.pro &amp;&amp;
202make &amp;&amp;
203popd</userinput></screen>
204
205 <para>
206 This package does not come with a test suite.
207 </para>
208
209 <para>
210 Now, as the <systemitem class="username">root</systemitem> user:
211 </para>
212
213<screen role="root"><userinput>install -v -m755 wpa_{cli,passphrase,supplicant} /sbin/ &amp;&amp;
214install -v -m644 doc/docbook/wpa_supplicant.conf.5 /usr/share/man/man5/ &amp;&amp;
215install -v -m644 doc/docbook/wpa_{cli,passphrase,supplicant}.8 /usr/share/man/man8/</userinput></screen>
216
217 <para revision="systemd">
218 Install the <application>systemd</application> support files by
219 running the following command as the <systemitem
220 class="username">root</systemitem> user:
221 </para>
222
223<screen role="root" revision="systemd"><userinput>install -v -m644 systemd/*.service /lib/systemd/system/</userinput></screen>
224
225 <para>
226 If you have built <application>WPA Supplicant</application> with
227 <application>D-Bus</application> support, you will need to install
228 <application>D-Bus</application> configuration files. Install them
229 by running the following commands as the
230 <systemitem class="username">root</systemitem> user:
231 </para>
232
233<screen role="root"><userinput>install -v -m644 dbus/fi.{epitest.hostap.WPASupplicant,w1.wpa_supplicant1}.service \
234 /usr/share/dbus-1/system-services/ &amp;&amp;
235install -v -m644 dbus/dbus-wpa_supplicant.conf \
236 /etc/dbus-1/system.d/wpa_supplicant.conf</userinput></screen>
237
238 <para revision="systemd">
239 Additionally, enable the <filename>wpa_supplicant.service</filename>
240 so that <application>systemd</application> can properly activate the
241 <application>D-Bus</application> service. Note that the
242 per-connection service and the D-Bus service cannot be enabled
243 at the same time. Run the following command as the
244 <systemitem class="username">root</systemitem> user:
245 </para>
246
247<screen role="root" revision="systemd"><userinput>systemctl enable wpa_supplicant</userinput></screen>
248
249 <para>
250 If you have built the <application>WPA Supplicant</application> GUI
251 program, install it by running the following commands as the
252 <systemitem class="username">root</systemitem> user:
253 </para>
254
255<screen role="root"><userinput>install -v -m755 wpa_gui-qt4/wpa_gui /usr/bin/ &amp;&amp;
256install -v -m644 doc/docbook/wpa_gui.8 /usr/share/man/man8/ &amp;&amp;
257install -v -m644 wpa_gui-qt4/wpa_gui.desktop /usr/share/applications/ &amp;&amp;
258install -v -m644 wpa_gui-qt4/icons/wpa_gui.svg /usr/share/pixmaps/</userinput></screen>
259
260 <note>
261 <para>
262 You will need to restart the system <application>D-Bus</application> daemon
263 before you can use the <application>WPA Supplicant</application>
264 <application>D-Bus</application> interface.
265 </para>
266 </note>
267
268 <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
269 href="../../xincludes/update-desktop-database.xml"/>
270
271 </sect2>
272
273 <sect2 role="configuration">
274 <title>Configuring wpa_supplicant</title>
275
276 <sect3 id="wpa_supplicant-config">
277 <title>Config File</title>
278
279 <para revision="sysv">
280 <filename>/etc/sysconfig/wpa_supplicant-*.conf</filename>
281 </para>
282
283 <para revision="systemd">
284 <filename>/etc/wpa_supplicant/wpa_supplicant-*.conf</filename>
285 </para>
286
287 <indexterm zone="wpa_supplicant wpa_supplicant-config" revision="sysv">
288 <primary
289 sortas="e-etc-sysconfig-wpa_supplicant-star.conf">/etc/sysconfig/wpa_supplicant-*.conf</primary>
290 </indexterm>
291
292 <indexterm zone="wpa_supplicant wpa_supplicant-config" revision="systemd">
293 <primary
294 sortas="e-etc-wpa_supplicant-wpa_supplicant-star.conf">/etc/wpa_supplicant/wpa_supplicant-*.conf</primary>
295 </indexterm>
296
297 </sect3>
298
299 <sect3>
300 <title>Configuration Information</title>
301
302 <para>
303 To connect to an access point that uses a password, you need to put
304 the pre-shared key in
305 <phrase revision="sysv"><filename>
306 /etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</filename>.</phrase>
307 <phrase revision="systemd"><filename>
308 /etc/wpa_supplicant/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</filename>.</phrase>
309 SSID is the string that the access point/router transmits to
310 identify itself. Run the following command as the
311 <systemitem class="username">root</systemitem> user:
312 </para>
313
314<screen role="root" revision="sysv"><userinput>wpa_passphrase <replaceable>SSID</replaceable> <replaceable>SECRET_PASSWORD</replaceable> &gt; /etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</userinput></screen>
315
316<screen role="root" revision="systemd"><userinput>install -v -dm755 /etc/wpa_supplicant &amp;&amp;
317wpa_passphrase <replaceable>SSID</replaceable> <replaceable>SECRET_PASSWORD</replaceable> &gt; /etc/wpa_supplicant/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</userinput></screen>
318
319 <para>
320 <phrase revision="sysv"><filename>/etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf </filename></phrase>
321 <phrase revision="systemd"><filename>/etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</filename></phrase>
322 can hold the details of several access points. When
323 <command>wpa_supplicant</command> is started, it will scan for the
324 SSIDs it can see and choose the appropriate password to connect.
325 </para>
326
327 <para>
328 If you want to connect to an access point that isn't password
329 protected, put an entry like this in
330 <phrase revision="sysv" ><filename>/etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</filename></phrase>
331 <phrase revision="systemd"><filename>/etc/sysconfig/wpa_supplicant-<replaceable>wifi0</replaceable>.conf</filename></phrase>.
332 Replace "Some-SSID" with the SSID of the access point/router.
333 </para>
334
335<screen>network={
336 ssid="<replaceable>Some-SSID</replaceable>"
337 key_mgmt=NONE
338}</screen>
339
340 <para>Connecting to a new access point that is not in the configuration
341 file can be accomplished manually via the command line or GUI, but it
342 must be done via a privileged user. To do that, add the following to the
343 configuration file:</para>
344
345<screen>ctrl_interface=DIR=/run/wpa_supplicant GROUP=&lt;priviledged group&gt;
346update_config=1</screen>
347
348 <para>
349 Replace the &lt;priviledged group&gt; above with a system group where
350 members have the ability to connect to a wireless access point.
351 </para>
352
353 <para>
354 There are many options that you could use to tweak how you connect
355 to each access point. They are described in some detail in the
356 <filename>wpa_supplicant/wpa_supplicant.conf</filename> file in the
357 source tree.
358 </para>
359
360 </sect3>
361
362 <sect3>
363 <title>Connecting to an Access Point</title>
364
365 <para id="wpa-service" revision="sysv">
366 If you want to configure network interfaces at boot using
367 <command>wpa_supplicant</command>, you need to install the
368 <filename>/lib/services/wpa</filename> script
369 included in <xref linkend="bootscripts"/> package:
370 </para>
371
372<screen role="root" revision="sysv"><userinput>make install-service-wpa</userinput></screen>
373
374 <indexterm zone="wpa_supplicant wpa-service" revision="sysv">
375 <primary sortas="f-wpa">wpa</primary>
376 </indexterm>
377
378 <para revision="sysv">
379 If your router/access point uses DHCP to allocate IP addresses, you
380 can install <xref linkend="dhcp"/> client and use it to
381 automatically obtain network addresses. Create the
382 <filename>/etc/sysconfig/ifconfig-<replaceable>wifi0</replaceable>
383 </filename> by running the following command as the
384 <systemitem class="username">root</systemitem> user:
385 </para>
386
387<screen role="root" revision="sysv"><userinput>cat &gt; /etc/sysconfig/ifconfig.<replaceable>wifi0</replaceable> &lt;&lt; "EOF"
388<literal>ONBOOT="yes"
389IFACE="<replaceable>wlan0</replaceable>"
390SERVICE="wpa"
391
392# Additional arguments to wpa_supplicant
393WPA_ARGS=""
394
395WPA_SERVICE="dhclient"
396DHCP_START=""
397DHCP_STOP=""
398
399# Set PRINTIP="yes" to have the script print
400# the DHCP assigned IP address
401PRINTIP="no"
402
403# Set PRINTALL="yes" to print the DHCP assigned values for
404# IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
405PRINTALL="no"</literal>
406EOF</userinput></screen>
407
408 <para revision="sysv">
409 If you prefer <xref linkend="dhcpcd"/> instead of
410 <xref linkend="dhcp"/> client, then create the
411 <filename>/etc/sysconfig/ifconfig-<replaceable>wifi0</replaceable>
412 </filename> by running the following command as the
413 <systemitem class="username">root</systemitem> user:
414 </para>
415
416<screen role="root" revision="sysv"><userinput>cat &gt; /etc/sysconfig/ifconfig.<replaceable>wifi0</replaceable> &lt;&lt; "EOF"
417<literal>ONBOOT="yes"
418IFACE="<replaceable>wlan0</replaceable>"
419SERVICE="wpa"
420
421# Additional arguments to wpa_supplicant
422WPA_ARGS=""
423
424WPA_SERVICE="dhcpcd"
425DHCP_START="-b -q <replaceable>&lt;insert appropriate start options here&gt;</replaceable>"
426DHCP_STOP="-k <replaceable>&lt;insert additional stop options here&gt;</replaceable>"</literal>
427EOF</userinput></screen>
428
429 <para revision="sysv">
430 Alternatively, if you use static addresses on your local network,
431 then create the
432 <filename>/etc/sysconfig/ifconfig-<replaceable>wifi0</replaceable>
433 </filename> by running the following command as the
434 <systemitem class="username">root</systemitem> user:
435 </para>
436
437<screen role="root" revision="sysv"><userinput>cat &gt; /etc/sysconfig/ifconfig.<replaceable>wifi0</replaceable> &lt;&lt; "EOF"
438<literal>ONBOOT="yes"
439IFACE="<replaceable>wlan0</replaceable>"
440SERVICE="wpa"
441
442# Additional arguments to wpa_supplicant
443WPA_ARGS=""
444
445WPA_SERVICE="ipv4-static"
446IP="192.168.1.1"
447GATEWAY="192.168.1.2"
448PREFIX="24"
449BROADCAST="192.168.1.255"</literal>
450EOF</userinput></screen>
451
452 <para revision="systemd">
453 There are 3 types of <application>systemd</application> units
454 that were installed:
455 </para>
456
457 <itemizedlist spacing="compact" revision="systemd">
458 <listitem>
459 <para>
460 wpa_supplicant@.service
461 </para>
462 </listitem>
463 <listitem>
464 <para>
465 wpa_supplicant-nl80211@.service
466 </para>
467 </listitem>
468 <listitem>
469 <para>
470 wpa_supplicant-wired@.service
471 </para>
472 </listitem>
473 </itemizedlist>
474
475 <para revision="systemd">
476 The only difference between 3 of them is what driver
477 is used for connecting (-D option). The first one uses
478 the default driver, the second one uses the nl80211
479 driver and the third one uses the wired driver.
480 </para>
481
482 <para>
483 You can connect to the wireless access point by
484 running the following command as the
485 <systemitem class="username">root</systemitem> user:
486 </para>
487
488<screen role="root" revision="sysv"><userinput>ifup <replaceable>wifi0</replaceable></userinput></screen>
489
490 <para revision="sysv">
491 Replace <replaceable>wlan0</replaceable> with the correct
492 wireless interface and <replaceable>wifi0</replaceable>
493 with desired name for the configuration file. Please note
494 that <filename>wpa_supplicant-*.conf</filename> and
495 <filename>ifconfig.*</filename> configuration files need
496 to have identical names, ie both contain
497 <replaceable>wifi0</replaceable> in their name.
498 </para>
499
500<screen role="root" revision="systemd"><userinput>systemctl start wpa_supplicant@<replaceable>wlan0</replaceable></userinput></screen>
501
502 <para revision="systemd">
503 To connect to the wireless access point at
504 boot, simply enable the appropriate
505 <command>wpa_supplicant</command> service
506 by running the following command as the
507 <systemitem class="username">root</systemitem> user:
508 </para>
509
510<screen role="root" revision="systemd"><userinput>systemctl enable wpa_supplicant@<replaceable>wlan0</replaceable></userinput></screen>
511
512 <para revision="systemd">
513 Depending on your setup, you can replace the
514 <filename>wpa_supplicant@.service</filename>
515 with any other listed above.
516 </para>
517
518 <para revision="systemd">
519 To assign a network address to your wireless interface, consult the
520 <ulink url="&lfs-root;/chapter07/network.html">General Network Configuration</ulink>
521 page in LFS.
522 </para>
523
524 </sect3>
525
526 </sect2>
527
528 <sect2 role="content">
529 <title>Contents</title>
530
531 <segmentedlist>
532 <segtitle>Installed Programs</segtitle>
533 <segtitle>Installed Libraries</segtitle>
534 <segtitle>Installed Directories</segtitle>
535
536 <seglistitem>
537 <seg>
538 wpa_gui, wpa_supplicant, wpa_passphrase and wpa_cli
539 </seg>
540 <seg>
541 None
542 </seg>
543 <seg>
544 None
545 </seg>
546 </seglistitem>
547 </segmentedlist>
548
549 <variablelist>
550 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
551 <?dbfo list-presentation="list"?>
552 <?dbhtml list-presentation="table"?>
553
554 <varlistentry id="wpa_gui">
555 <term><command>wpa_gui</command></term>
556 <listitem>
557 <para>
558 is a graphical frontend program for interacting with
559 <application>wpa_supplicant</application>.
560 </para>
561 <indexterm zone="wpa_supplicant wpa_gui">
562 <primary sortas="b-wpa_gui">wpa_gui</primary>
563 </indexterm>
564 </listitem>
565 </varlistentry>
566
567 <varlistentry id="wpa_supplicant-prog">
568 <term><command>wpa_supplicant</command></term>
569 <listitem>
570 <para>
571 is a daemon that can connect to a password protected wireless
572 access point.
573 </para>
574 <indexterm zone="wpa_supplicant wpa_supplicant-prog">
575 <primary sortas="b-wpa_supplicant">wpa_supplicant</primary>
576 </indexterm>
577 </listitem>
578 </varlistentry>
579
580 <varlistentry id="wpa_passphrase">
581 <term><command>wpa_passphrase</command></term>
582 <listitem>
583 <para>
584 takes an SSID and a password and generates a simple
585 configuration that <command>wpa_supplicant</command> can
586 understand.
587 </para>
588 <indexterm zone="wpa_supplicant wpa_passphrase">
589 <primary sortas="b-wpa_passphrase">wpa_passphrase</primary>
590 </indexterm>
591 </listitem>
592 </varlistentry>
593
594 <varlistentry id="wpa_cli">
595 <term><command>wpa_cli</command></term>
596 <listitem>
597 <para>
598 is a command line interface used to control a running
599 <command>wpa_supplicant</command> daemon.
600 </para>
601 <indexterm zone="wpa_supplicant wpa_cli">
602 <primary sortas="b-wpa_cli">wpa_cli</primary>
603 </indexterm>
604 </listitem>
605 </varlistentry>
606
607 </variablelist>
608
609 </sect2>
610
611</sect1>
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