netdev - Re: ifconfig doesn't show assignment ip-addresses

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Date:	Tue, 10 Dec 2013 12:43:39 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Alexander Aring <alex.aring@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: ifconfig doesn't show assignment ip-addresses

Tue, Dec 10, 2013 at 12:06:49PM CET, alex.aring@...il.com wrote:
>Hi,
>
>thanks for your reply.
>
>On Tue, Dec 10, 2013 at 11:57:41AM +0100, Jiri Pirko wrote:
>> Mon, Dec 09, 2013 at 04:32:39PM CET, alex.aring@...il.com wrote:
>> >Hi,
>> >
>> >On current net-next with a lowpan interface created with:
>> >
>> >ip link add link wpan0 name lowpan0 type lowpan
>> >
>> >I don't see any ipv6 addresses in ifconfig anymore. The addresses exist,
>> >because I can ping my device.
>> 
>> 
>> Can you see the address in "ip a" ? Would you send me output of
>> "ifconfig" and "ip a" please? Is this a problem for lowpan only or do
>> you see this with other device types as well?
>> 

The problem is that ifconfig parses /proc/net/if_inet6 which changed
flag format from 2 hexa chars to 3.
I will send revert for this change in couple of minutes.


>
>Yes I can see the address in "ip a".
>
>Output of "ip a":
>
>1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue 
>    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 qlen 1000
>    link/ether 52:54:00:12:34:56 brd ff:ff:ff:ff:ff:ff
>    inet6 2001::2/64 scope global 
>       valid_lft forever preferred_lft forever
>    inet6 2001::3/64 scope global 
>       valid_lft forever preferred_lft forever
>    inet6 fe80::5054:ff:fe12:3456/64 scope link 
>       valid_lft forever preferred_lft forever
>3: sit0: <NOARP> mtu 1480 qdisc noop 
>    link/sit 0.0.0.0 brd 0.0.0.0
>4: wpan0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 127 qdisc pfifo_fast qlen 300
>    link/[804] aa:aa:aa:aa:aa:aa:aa:aa brd ff:ff:ff:ff:ff:ff:ff:ff
>5: lowpan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1281 qdisc noqueue 
>    link/[804] aa:aa:aa:aa:aa:aa:aa:aa brd ff:ff:ff:ff:ff:ff:ff:ff
>    inet6 2001::1/64 scope global 
>       valid_lft forever preferred_lft forever
>    inet6 fe80::1/64 scope link 
>       valid_lft forever preferred_lft forever
>    inet6 fe80::a8aa:aaaa:aaaa:aaaa/64 scope link 
>       valid_lft forever preferred_lft forever
>
>Output of "ifconfig":
>
>eth0      Link encap:Ethernet  HWaddr 52:54:00:12:34:56  
>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:1000 
>          RX bytes:0 (0.0 B)  TX bytes:1144 (1.1 KiB)
>
>lo        Link encap:Local Loopback  
>          inet addr:127.0.0.1  Mask:255.0.0.0
>          UP LOOPBACK RUNNING  MTU:65536  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0 
>          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>
>lowpan0   Link encap:UNSPEC  HWaddr AA-AA-AA-AA-AA-AA-AA-AA-00-00-00-00-00-00-00-00  
>          UP BROADCAST RUNNING MULTICAST  MTU:1281  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:0 
>          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
>
>wpan0     Link encap:UNSPEC  HWaddr AA-AA-AA-AA-AA-AA-AA-AA-00-00-00-00-00-00-00-00  
>          UP BROADCAST RUNNING NOARP  MTU:127  Metric:1
>          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
>          collisions:0 txqueuelen:300 
>          RX bytes:0 (0.0 B)  TX bytes:597 (597.0 B)
>
>So i can't see any inet6 addresses on eth0 interface, so maybe it isn't
>a lowpan specific problem.
>
>I use ip/ifconfig from busybox at version:
>
>BusyBox v1.20.2 (2013-11-16 07:37:30 CET) multi-call binary.
>
>- Alex
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