2015-07-13 19:48 GMT+02:00 Alexander Aring <alex.aring@xxxxxxxxx>: > Hi, > > On Mon, Jul 13, 2015 at 06:18:47PM +0200, Baptiste Clenet wrote: >> 2015-07-13 16:59 GMT+02:00 Baptiste Clenet <bapclenet@xxxxxxxxx>: >> > Hi, >> > >> > Here is how I set the network: >> > modprobe at86rf230 >> > iwpan dev wpan0 set pan_id 0xbeef >> > ip link set wpan0 up >> > ip link add link wpan0 name lowpan0 type lowpan >> > ip link set lowpan0 up >> > >> > Then I try to do: >> > ping6 -I lowpan0 fe80::a8af:ac69:e53e:c7f1 >> > >> > Nothing is sent. (I checked by sniffing the SPI pins). No errors from >> > ping6 or other layers in the network stack. >> > >> > root@OpenWrt:/# ifconfig >> > lowpan0 Link encap:UNSPEC HWaddr >> > 05-38-09-06-90-E0-5E-3E-00-00-00-00-00-00-00-00 >> > inet6 addr: fe80::738:906:90e0:5e3e/64 Scope:Link >> > UP BROADCAST RUNNING MULTICAST MTU:1280 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 >> > 05-38-09-06-90-E0-5E-3E-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:1 errors:0 dropped:0 overruns:0 carrier:0 >> > collisions:0 txqueuelen:300 >> > RX bytes:0 (0.0 B) TX bytes:75 (75.0 B) >> > >> > (TX bytes:75 (75.0 B), seems to be sent when you up lowpan0 ?) >> > > > Yes, this is because the IPv6 neighbor discovery protocol. (We don't > increment the lowpan interface stats currently), but this should be some > patch later which increments the "uncompressed" part of 6LoWPAN -> > simple IPv6 view, this is also what wireshark offers you on this > interface. Ok thanks. > >> > >> > Is my settings right? What should I check to make sure the data goes >> > from each layer of the network stack? >> > > > Yes, the setting is right. > > I have no idea why it doesn't work on your side. That the "tx stats" of > wpan interface are incremented shows me it runs the code at [0]. > > Before we call "drv_xmit_async" which calls the function at [1]. > > Maybe you can do some 'printk(KERN_INFO "foobar\n")' at [1] to see if > you really call that function in driver layer, but it should. Yes, it goes to 'at86rf230_xmit()' when lowpan goes up. That explains the 75Bytes > > Do you see SPI traffic while probing? Because at [2] we have some > id registers reads. If you don't see spi traffic and it probes > successful then your sniffing setup seems wrong. If you see spi traffic > then it seems to be correct and something is different in openwrt when > calling ?spi_async?. > The probe runs well, I see all the exchange data (SPI traffic), it detects the chip version of the transceiver, Write frame buffer works great as well. The driver works with the transceiver, I think the problem comes from upper layer. The thing is, calling 'ip link set lowpan0 up ' goes to 'at86rf230_xmit()' and I see the data transmitted over the SPI pins which is fine but when I try to ping6, it never goes to 'at86rf230_xmit()' and there is no data exchange on the bus. > Do you use now the software spi bit banging driver over gpio's? Yes I use software spi bit banging driver over gpio's which works great. > > > - Alex > > [0] http://lxr.free-electrons.com/source/net/mac802154/tx.c#L106 > [1] http://lxr.free-electrons.com/source/drivers/net/ieee802154/at86rf230.c#L1027 > [2] http://lxr.free-electrons.com/source/drivers/net/ieee802154/at86rf230.c#L1648 ip link gives me that: root@OpenWrt:/# ip link 6: wpan0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 127 qdisc fq_codel state UNKNOWN mode DEFAULT group default qlen 300 link/ieee802.15.4 ef:57:b2:a9:2f:4e:90:76 brd ff:ff:ff:ff:ff:ff:ff:ff 7: lowpan0@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1280 qdisc noqueue state UNKNOWN mode DEFAULT group default link/[825] ef:57:b2:a9:2f:4e:90:76 brd ff:ff:ff:ff:ff:ff:ff:ff I'm wondering what [825] means? Shouldn't it be ieee802.15.4 instead? What does ping6 -I lowpan0? Does it create an ICMP6 socket? How is ping6 connected to lowpan0 interface? (I mean in the source code) -- Baptiste -- To unsubscribe from this list: send the line "unsubscribe linux-wpan" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
