Hi Christian,
I had the exact same problem before. Currently, the net-next kernel
does not fill struct ieee802154_mlme_ops mac802154_mlme_wpan completely
(in net/mac802154/mac_cmd.c). The current code does not set the
assoc_req member to a function (hence, it remains NULL). When trying to
send association request (and I believe association response), it
produces a NULL pointer dereference.
You may work around this problem, like I did, by not using iz assoc to
build your kernel. You can use exclusively izcoordinator instead (which
make no use of the association messages). Here is how I set up my
network on two different nodes:
- on node 1:
izcoordinator -d 1 -l lease -i wpan0 -p 0x777 -s 1 -c 11
[... 6lowpan stuffs ...]
- on node 2:
izcoordinator -d 1 -l lease -i wpan0 -p 0x777 -s 2 -c 11
[... 6lowpan stuffs ...]
The documentation you pointed out works for the linux-zibgee and may
not apply entirely to the linux net-next (yet). You may want to have a
look at [1], which is more recent (see how it carefully not use iz
assoc).
Hope it helps.
Regards,
Tony
[1]: https://code.google.com/p/linux-wsn/wiki/LinuxStart
Le Fri, 27 Jul 2012 13:26:43 +0200,
Christian Groeger <kann.b...@gmail.com> a écrit :
> Hi everyone,
>
> what do I need to do to get the IEEE802.15.4 and 6LoWPAN stack
> working on my computer? I built the net-next kernel [1] with all the
> drivers compiled as modules and the linux-zigbee userspace tools [2].
> Everything compiles without errors.
>
> Then I more or less follow the Getting started guide in your wiki
> [3], I use the fakelb driver for testing. Everything seems to work
> fine, I bring up my wpan0 interface and see a "ieee802154fakelb:
> added ieee802154 hardware" in the kernel log.
>
> Then I try an 'iz assoc', which is killed immediately and I get a
> kernel oops in the kernel logfile (see below for logfile).
>
> Can anyone help get this working?
>
> Thanks.
>
> [1]
> http://git.kernel.org/?p=linux/kernel/git/davem/net-next.git;a=tree
> [2]
> http://linux-zigbee.git.sourceforge.net/git/gitweb.cgi?p=linux-zigbee/linux-zigbee;a=summary
> [3]
> http://sourceforge.net/apps/trac/linux-zigbee/wiki/GettingStarted-0.2
>
>
>
> [ 199.830666] BUG: unable to handle kernel NULL pointer dereference
> at (null)
> [ 199.830677] IP: [< (null)>] (null)
> [ 199.830686] PGD 1d2cb067 PUD 1d3cc067 PMD 0
> [ 199.830691] Oops: 0010 [#1] SMP
> [ 199.830695] Modules linked in: fakelb mac802154 ieee802154
> crc_ccitt joydev ppdev microcode snd_intel8x0 psmouse snd_ac97_codec
> ac97_bus serio_raw snd_pcm hid_generic i2c_piix4 snd_timer parport_pc
> snd soundcore mac_hid snd_page_alloc lp parport usbhid hid e1000
> [ 199.830719] CPU 0
> [ 199.830724] Pid: 1162, comm: iz Not tainted
> 3.5.0-net-next-next-20120726+ #3 innotek GmbH VirtualBox
> [ 199.830729] RIP: 0010:[<0000000000000000>] [<
> (null)>] (null)
> [ 199.830733] RSP: 0018:ffff88001d2579b0 EFLAGS: 00010246
> [ 199.830736] RAX: ffffffffa0138000 RBX: ffff88001c2c5000 RCX:
> 0000000000000000
> [ 199.830739] RDX: 000000000000000b RSI: ffff88001d2579c0 RDI:
> ffff88001c2c5000
> [ 199.830743] RBP: ffff88001d2579f8 R08: 000000000000008a R09:
> ffff88001d25798f
> [ 199.830746] R10: 0000000000000000 R11: 0000000000000246 R12:
> ffff88001d2579c0
> [ 199.830749] R13: ffff88001d257a18 R14: ffff88001cc23e00 R15:
> ffffffff81caa6c0
> [ 199.830758] FS: 00007fd84e5e5700(0000) GS:ffff88001fc00000(0000)
> knlGS:0000000000000000
> [ 199.830763] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [ 199.830766] CR2: 0000000000000000 CR3: 000000001d5b7000 CR4:
> 00000000000006f0
> [ 199.830775] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
> 0000000000000000
> [ 199.830779] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
> 0000000000000400
> [ 199.830783] Process iz (pid: 1162, threadinfo ffff88001d256000,
> task ffff88001d3d5b40)
> [ 199.830787] Stack:
> [ 199.830789] ffffffffa0128648 ffff88001d2579c8 0001077700000002
> ffff88001d2579e8
> [ 199.830795] 0000000042cd25bf ffffffffa012c000 ffffffffa012c100
> ffffffffa012c000
> [ 199.830800] ffff88001f20b414 ffff88001d257aa8 ffffffff815822da
> ffff880000000014
> [ 199.830806] Call Trace:
> [ 199.830814] [<ffffffffa0128648>] ?
> ieee802154_associate_req+0xd8/0x150 [ieee802154]
> [ 199.830823] [<ffffffff815822da>] genl_rcv_msg+0x21a/0x2b0
> [ 199.830828] [<ffffffff8154cbab>] ? __alloc_skb+0x8b/0x2a0
> [ 199.830833] [<ffffffff815820c0>] ? genl_rcv+0x40/0x40
> [ 199.830838] [<ffffffff81581a99>] netlink_rcv_skb+0xa9/0xd0
> [ 199.830842] [<ffffffff815820a5>] genl_rcv+0x25/0x40
> [ 199.830846] [<ffffffff8158147d>] netlink_unicast+0x1ad/0x230
> [ 199.830851] [<ffffffff815817b6>] netlink_sendmsg+0x2b6/0x310
> [ 199.830856] [<ffffffff8154034c>] sock_sendmsg+0xdc/0xf0
> [ 199.830861] [<ffffffff81542b9a>] ? move_addr_to_kernel+0x5a/0xa0
> [ 199.830865] [<ffffffff81541c8c>] __sys_sendmsg+0x38c/0x3a0
> [ 199.830871] [<ffffffff8114b2c9>] ? handle_mm_fault+0x259/0x340
> [ 199.830877] [<ffffffff8113d7eb>] ? krealloc+0x1b/0x60
> [ 199.830883] [<ffffffff81667540>] ? do_page_fault+0x210/0x520
> [ 199.830888] [<ffffffff81082903>] ? __wake_up+0x53/0x70
> [ 199.830893] [<ffffffff81543ad9>] sys_sendmsg+0x49/0x90
> [ 199.830898] [<ffffffff8166bb69>] system_call_fastpath+0x16/0x1b
> [ 199.830901] Code: Bad RIP value.
> [ 199.830919] RIP [< (null)>] (null)
> [ 199.830923] RSP <ffff88001d2579b0>
> [ 199.830926] CR2: 0000000000000000
> [ 199.830930] ---[ end trace 2d2a3541563f58e9 ]---
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