Hi,
On Fri, Mar 08, 2013 at 11:21:38AM +0900, YOSHIFUJI Hideaki wrote:
> Hi,
>
> Alexander Aring wrote:
> > Hi,
> >
> > I don't know if this is a right solution for that, because other
> > functions like addrconf_ifid_infiniband to manipulate eui after memcpy,
> > too.
> >
> > But this patch solves my problems with ieee802154 stack.
>
> What kind of problems do you have?
>
I compile with #define DEBUG enabled in net/ieee802154/6lowpan.c
The problem is the address compression in 6lowpan.
First device has address fe80::a000:0:0:1/64. Second device has address
fe80::a000:0:0:2/64. I use only a ping6 to check connection.
Debug Information on the receiving side:
Without your patch which is working.
iphc0 = 7a, iphc1 = 11
NH flag is set, next header carried inline: 3a
source address stateless compression
(lowpan_uncompress_addr) linklocal address:
a0 00 00 00 00 00 00 02
uncompressing 2 + 8 =>
fe 80 00 00 00 00 00 00 a0 00 00 00 00 00 00 02
dest: stateless compression
(lowpan_uncompress_addr) linklocal address:
a0 00 00 00 00 00 00 01
uncompressing 2 + 8 =>
fe 80 00 00 00 00 00 00 a0 00 00 00 00 00 00 01
skb headroom size = 40, data length = 64
IPv6 header dump:
version = 6
length = 64
nexthdr = 0x3a
hop_lim = 64
With your patch, which isn't working anymore:
iphc0 = 7b, iphc1 = 3b
NH flag is set, next header carried inline: 3a
source address stateless compression
(lowpan_uncompress_addr) linklocal address:
02 85 00 3a 20 00 00 00
uncompressing 2 + 0 =>
fe 80 00 00 00 00 00 00 00 85 00 3a 20 00 00 00
dest: non context-based mcast compression
uncompressing 2 + 1 =>
ff 02 00 00 00 00 00 00 00 00 00 00 00 00 00 02
skb headroom size = 25, data length = 24
IPv6 header dump:
version = 6
length = 24
nexthdr = 0x3a
hop_lim = 255
And for every ipv6 packet I got:
ICMPv6 checksum failed [fe80:0000:0000:0000:0001:ff00:0001:8700 >
ff02:0000:0000:0000:0000:0001:ff00:0001]
I seems that the reconstructed destination address and header length are
not right.
I will try to figure out this problem. Hope this information helps you to
know more about my problems.
Regards
Alex
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