We are running OpenWRT/Tp-Link Archer A6 HW v2... (openwrt : 21.02
ebtables v2.0.10-4)
and when we run this ebtables with nflog extension as mentioned below
ebtables -I FORWARD -o eth1 -p ip --ip-protocol udp --ip-source-port
68 --nflog-group 1 --nflog-prefix "ENTRY1" -j ACCEPT
, we are running into the following issues..
Unable to update the kernel. Two possible causes:
1. Multiple ebtables programs were executing simultaneously. The ebtables
userspace tool doesn't by default support multiple ebtables programs running
concurrently. The ebtables option --concurrent or a tool like flock can be
used to support concurrent scripts that update the ebtables kernel tables.
2. The kernel doesn't support a certain ebtables extension, consider
recompiling your kernel or insmod the extension.
We have confirmed the required kernel configs are enabled and ensured
the same with a ARM platform where the same command works..
However, dumping the data that goes to the kernel, we see a huge
difference between MIPS and ARM..
in ARM platform
w_l->w:
0000 6e 66 6c 6f 67 00 ff b6 00 00 00 00 00 00 00 00 nflog...........
0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0020 50 00 00 00 00 00 00 00 01 00 01 00 00 00 00 00 P...............
0030 45 4e 54 52 59 31 00 00 00 00 00 00 00 00 00 00 ENTRY1..........
0040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
0070 00 00 00 00
in tplink a6 (MIPS platform)
w_l->w:
0000 6e 66 6c 6f 67 00 b2 e0 69 6d 69 74 20 65 78 63 nflog...imit exc
0010 65 65 64 65 64 00 56 69 72 74 75 61 6c 20 74 69 eeded.Virtual ti
0020 00 00 00 50 65 78 70 69 00 01 00 01 50 72 6f 66 ...Pexpi....Prof
0030 45 4e 54 52 59 31 00 69 6d 65 72 20 65 78 70 69 ENTRY1.imer expi
0040 72 65 64 00 57 69 6e 64 6f 77 20 63 68 61 6e 67 red.Window chang
0050 65 64 00 49 2f 4f 20 70 6f 73 73 69 62 6c 65 00 ed.I/O possible.
0060 50 6f 77 65 72 20 66 61 69 6c 75 72 65 00 42 61 Power failure.Ba
0070 64 20 73 79
d sy
Can you please let me know what's going wrong with this?
Thanks
Senthil
