dhcpcd-discuss

Hi all,

I use dhcpcd 6.6.x in some network configuration scripts also to
configure static addresses, with the cmdline option '-S 
ip_address=.../...'.

I also found it very handy to use different labels for the network 
device
to be able to configure/unconfigure different addresses on the same 
device
as in the following example:

# dhcpcd -S ip_address=192.168.0.10/24 eth0:static
# dhcpcd -S ip_address=10.1.2.3/8 eth0:factory
...

these commands run in the background until I decide to unconfigure
one of them with:

# dhcpcd -k eth0:factory

This only remove the factory ip without affecting the other.

Now, after upgrading the linux kernel to v3.18.x these commands
don't work anymore:

# dhcpcd -d -S ip_address=192.168.0.10/24 eth0:static
dhcpcd[26781]: version 6.6.7 starting
dhcpcd[26781]: /proc/sys/net/ipv6/conf/eth0:factory/accept_ra: No such 
file or directory
dhcpcd[26781]: eth0:factory: adding address fe80::5ece:4894:34ea:7bcb
dhcpcd[26781]: eth0:factory: pltime infinity, vltime infinity
dhcpcd[26781]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
PREINIT
dhcpcd[26781]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
CARRIER
dhcpcd[26781]: DUID 00:01:00:01:1b:8d:cc:38:00:22:3f:e1:1a:31
dhcpcd[26781]: eth0:factory: IAID c5:07:00:a5
dhcpcd[26781]: eth0:factory: delaying IPv4 for 0.1 seconds
dhcpcd[26781]: eth0:factory: interface departed
dhcpcd[26781]: eth0:factory: removing interface
dhcpcd[26781]: eth0:factory: deleting address fe80::5ece:4894:34ea:7bcb
dhcpcd[26781]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
DEPARTED
dhcpcd[26781]: exited

After some try and fails I found that this is due to the ipv6 part of 
the command,
if I just request an ipv4 address it works as expected:

# dhcpcd -d -4 -S ip_address=192.168.0.10/24 eth0:factory
dhcpcd[27095]: version 6.6.7 starting
dhcpcd[27095]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
PREINIT
dhcpcd[27095]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
CARRIER
dhcpcd[27095]: DUID 00:01:00:01:1b:8d:cc:38:00:22:3f:e1:1a:31
dhcpcd[27095]: eth0:factory: IAID c5:07:00:a5
dhcpcd[27095]: eth0:factory: delaying IPv4 for 0.3 seconds
dhcpcd[27095]: eth0:factory: using static address 192.168.0.10/24
dhcpcd[27095]: eth0:factory: adding IP address 192.168.0.10/24
dhcpcd[27095]: eth0:factory: adding route to 192.168.0.0/24
dhcpcd[27095]: eth0:factory: executing `/lib/dhcpcd/dhcpcd-run-hooks' 
STATIC
dhcpcd[27095]: forking to background
dhcpcd[27095]: forked to background, child pid 27123
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast 
state UP group default qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.54/8 brd 10.255.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.0.10/24 brd 192.168.0.255 scope global eth0:factory
       valid_lft forever preferred_lft forever
    inet6 fe80::203:c5ff:fe07:a5/64 scope link
       valid_lft forever preferred_lft forever


Moreover, if I just use 'eth0' as the net device, without the label 
':factory'
it works again as expected:

# dhcpcd -d -S ip_address=192.168.0.10/24 eth0
dhcpcd[28154]: version 6.6.7 starting
dhcpcd[28154]: eth0: disabling kernel IPv6 RA support
dhcpcd[28154]: eth0: executing `/lib/dhcpcd/dhcpcd-run-hooks' PREINIT
dhcpcd[28154]: eth0: executing `/lib/dhcpcd/dhcpcd-run-hooks' CARRIER
dhcpcd[28154]: DUID 00:01:00:01:1b:8d:cc:38:00:22:3f:e1:1a:31
dhcpcd[28154]: eth0: IAID c5:07:00:a5
dhcpcd[28154]: eth0: delaying IPv6 router solicitation for 0.7 seconds
dhcpcd[28154]: eth0: delaying IPv4 for 0.5 seconds
dhcpcd[28154]: eth0: using static address 192.168.0.10/24
dhcpcd[28154]: eth0: adding IP address 192.168.0.10/24
dhcpcd[28154]: eth0: adding route to 192.168.0.0/24
dhcpcd[28154]: eth0: executing `/lib/dhcpcd/dhcpcd-run-hooks' STATIC
dhcpcd[28154]: forking to background
dhcpcd[28154]: forked to background, child pid 28176
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
group default
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast 
state UP group default qlen 1000
    link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.54/8 brd 10.255.255.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.0.10/24 brd 192.168.0.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::203:c5ff:fe07:a5/64 scope link
       valid_lft forever preferred_lft forever

Does someone also experience the same problems ?

giorgio

--
Giorgio, iw3gtf@xxxxxxxxxx



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