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[solved] systemd, dhclient and wpa_supplicant
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elmar283
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Joined: 06 Dec 2004
Posts: 209
Location: Haarlem, Netherlands

PostPosted: Sun Jul 20, 2014 2:21 pm    Post subject: [solved] systemd, dhclient and wpa_supplicant Reply with quote

For the fun of it I'm checking out wether I like sytemd or not. So I set up an working Gentoo Linux Box with systemd.
This machine has been a router in the past. Basicly it sets up a static ip-adres on the ethernet enp2s0 and a wireless connection with wpa_supplicant en dhclient (part of dhcp) with wlp3s0.

The static part is covert. I have made my own script so it sets this up.
Now for the wireless part I first wanted to know if systemd could use this card with wpa_supplicant and dhclient at all. So I installed xfce4, nm_applet and networkmanager. Result: works perfect! :D.

But this is not what I want. I do not want to use networkmanager.
I used the have net.wlp3s0 and a config at /etc/conf.d/net like this:
Code:

config_wlp3s0="dhcp"

iwconfig_wlp3s0="mode managed"
modules_wlp3s0="wpa_supplicant dhclient"
wpa_supplicant_wlp3s0="-Dwext -c /etc/wpa_supplicant/wpa_supplicant.conf"
wpa_timeout_wlp3s0=60
associate_timeout_wlp3s0=60
dhcp_wlp3s0="release"

config_enp2s0="10.0.0.1 netmask 255.255.255.0 brd 10.0.0.255 promisc"
associate_timeout_enp2s0=60
dns_servers="194.109.6.66 8.8.8.8"
associate_timeout_enp2s0=60


I read the information on ArchWiki (https://wiki.archlinux.org/index.php/WPA_supplicant#Enabling_with_systemd), but that is much to technical and not practical. By googleing I didn't find the answer ether.

Can someone help me with this? And maybe it is a good idea to add this to the installation handbook?

To help what I would like is a scrip on /etc/systemd/system/wlp3s0.service or something like that. Or another way to first activate wpa_supplicant true wpa_supplicant@.service and then get an ip-addres with a script that trigers 'dhclient wlp3s0'


Last edited by elmar283 on Sun Jul 20, 2014 3:31 pm; edited 1 time in total
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elmar283
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Joined: 06 Dec 2004
Posts: 209
Location: Haarlem, Netherlands

PostPosted: Sun Jul 20, 2014 3:12 pm    Post subject: Reply with quote

I have found a part of the sollution.
This is my config now:
Code:

/etc/systemd/system $ cat syslog.service
[Unit]
Description=System Logger Daemon
Documentation=man:syslog-ng(8)

[Service]
Sockets=syslog.socket
ExecStart=/usr/sbin/syslog-ng -F
ExecReload=/bin/kill -HUP $MAINPID
StandardOutput=null
Restart=on-failure

[Install]
WantedBy=multi-user.target
Alias=syslog.service
elmarotter@zaphodbeeblebrox /etc/systemd/system $ cat wlp3s0.service
[Unit]
Description=Dhclient connection with wpa_supplicant
After=local-fs.target
Documentation=man:ifconfig(8)
Documentation=man:route(8)

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/sbin/wpa_supplicant -D wext -B -i wlp3s0 -c /etc/wpa_supplicant/wpa_supplicant.conf
#ExecStart=/sbin/dhclient -e PEER_DNS=no -e IF_METRIC=10 -q -1 -pf /var/run/dhclient-wlp3s0.pid wlp3s0
ExecStart=/sbin/dhclient -e IF_METRIC=10 -q -pf /var/run/dhclient-wlp3s0.pid wlp3s0


[Install]
WantedBy=multi-user.target


Code:

 /etc/systemd/system $ cat static-network.service
[Unit]
Description=Static network service
After=local-fs.target
Documentation=man:ifconfig(8)
Documentation=man:route(8)

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/ifconfig enp2s0 10.0.0.1 broadcast 10.0.0.255 netmask 255.255.255.0 up
ExecStart=/bin/route add default gw 10.0.0.1 enp2s0

[Install]
WantedBy=multi-user.target


Now I'm going to check wether stopping the services stops the interfaces.
My guess is that it will not. I will let it know as soon as I know.
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elmar283
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Joined: 06 Dec 2004
Posts: 209
Location: Haarlem, Netherlands

PostPosted: Sun Jul 20, 2014 3:30 pm    Post subject: Reply with quote

Okey, All works fine:
Code:

/etc/systemd/system $ cat static-network.service
[Unit]
Description=Static network service
After=local-fs.target
Documentation=man:ifconfig(8)
Documentation=man:route(8)

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/ifconfig enp2s0 10.0.0.1 broadcast 10.0.0.255 netmask 255.255.0.0 promisc up 
#ExecStart=/bin/route add default gw 10.0.0.1 enp2s0

ExecStop=/bin/ifconfig enp2s0 down

[Install]
WantedBy=multi-user.target


Code:

etc/systemd/system $ cat wlp3s0.service
[Unit]
Description=Dhclient connection with wpa_supplicant
After=local-fs.target
Documentation=man:ifconfig(8)
Documentation=man:route(8)

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/sbin/wpa_supplicant -D wext -B -i wlp3s0 -c /etc/wpa_supplicant/wpa_supplicant.conf
#ExecStart=/sbin/dhclient -e PEER_DNS=no -e IF_METRIC=10 -q -1 -pf /var/run/dhclient-wlp3s0.pid wlp3s0
ExecStart=/sbin/dhclient -e IF_METRIC=10 -q -pf /var/run/dhclient-wlp3s0.pid wlp3s0

ExecStop=/bin/ifconfig wlp3s0 down

[Install]
WantedBy=multi-user.target
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EmaRsk
Tux's lil' helper
Tux's lil' helper


Joined: 07 Sep 2004
Posts: 99
Location: Italy

PostPosted: Mon Jul 21, 2014 3:45 pm    Post subject: Reply with quote

Nice :)
Maybe you could put this on the wiki.
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