Dear Subrata, long time - no update ;-)
But now i created a test that's able to detect a corrupt CAN frame flow inside the Kernel. So far the correct IFF_ECHO functionality has been accidentally removed by netdev patches two times. The latest fix was here: http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git;a=commitdiff;h=cff0d6e6edac7672b3f915bb4fb59f279243b7f9 To perform the local echo of CAN frames, the reference to the originating sock struct has to be passed to the netdevice without orphan of the socketbuffer. The new test tool 'tst-rcv-own-msgs' can check the correct packet flow by creating two can-raw sockets. To extend your test-script in network/can/filter-tests/run_ltp-can_tests.sh the modprobe of the vcan driver needs an additional parameter 'echo=1', which configures the driver to perform the CAN frame echo on driver level. This 'echo=1' setting does not have any impact to the filtertest performed in your script. The new tool 'tst-rcv-own-msgs' can be found in the same directory in the SocketCAN SVN where the current 'tst-filter-server' and 'tst-filter-master' tools are located too. I'll send the latest fix (see above) to the stable tree, as 2.6.35.3 currently still *has* this problem. On 2.6.35.3 you can see 'tst-rcv-own-msgs' ... - work correctly when echo=0 - will fail when echo=1 On 2.6.36-rc1 'tst-rcv-own-msgs' runs successfully regardless of the 'echo' setting of the vcan driver. Please give me feedback, if there are still open questions. Many thanks for your work & best regards, Oliver --- Load vcan module with commandline parameter echo=1 : r...@host:~# modprobe vcan echo=1 r...@host:~# ip link add dev vcan0 type vcan r...@host:~# ip link set vcan0 up --- When the test is successful, it looks like this: u...@host:~$ socketcan/trunk/test/tst-rcv-own-msgs vcan0 Starting PF_CAN frame flow test. checking socket default settings ... ok. check loopback 0 recv_own_msgs 0 ... ok. check loopback 0 recv_own_msgs 1 ... ok. check loopback 1 recv_own_msgs 0 ... ok. check loopback 1 recv_own_msgs 1 ... ok. PF_CAN frame flow test was successful. u...@host:~$ echo $? 0 u...@host:~$ --- When the test fails, it looks like this: u...@host:~$ socketcan/trunk/test/tst-rcv-own-msgs vcan0 Starting PF_CAN frame flow test. checking socket default settings ... failure! u...@host:~$ echo $? 1 u...@host:~$ --- ------------------------------------------------------------------------------ Sell apps to millions through the Intel(R) Atom(Tm) Developer Program Be part of this innovative community and reach millions of netbook users worldwide. Take advantage of special opportunities to increase revenue and speed time-to-market. Join now, and jumpstart your future. http://p.sf.net/sfu/intel-atom-d2d _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
