Sorry for missing post to vpp-dev.
So i'm using correct TAP interface.
Here is some trace with activated mactime on tap0
vpp# show trace
Limiting display to 50 packets. To display more specify max.
------------------- Start of thread 0 vpp_main -------------------
Packet 1
00:02:42:141421: virtio-input
virtio: hw_if_index 2 next-index 4 vring 0 len 98
hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0
csum_offset 0 num_buffers 1
00:02:42:141425: ethernet-input
IP4: 52:54:00:30:80:22 -> 74:d4:35:9d:21:ac
00:02:42:141426: l2-input
l2-input: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22
00:02:42:141427: l2-learn
l2-learn: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22 bd_index 1
00:02:42:141428: l2-fwd
l2-fwd: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22
bd_index 1 result [0x1000000000001, 1] none
00:02:42:141430: l2-output
l2-output: sw_if_index 1 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22
data 08 00 45 00 00 54 37 57 00 00 40 01
00:02:42:141430: host-data0-output
host-data0 l2_hdr_offset_valid l3_hdr_offset_valid
IP4: 52:54:00:30:80:22 -> 74:d4:35:9d:21:ac
ICMP: 10.3.72.59 -> 10.3.72.254
tos 0x00, ttl 64, length 84, checksum 0x9e13
fragment id 0x3757
ICMP echo_reply checksum 0x1f49
Packet 2
00:02:43:142927: virtio-input
virtio: hw_if_index 2 next-index 4 vring 0 len 98
hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0 csum_offset
0 num_buffers 1
00:02:43:142931: ethernet-input
IP4: 52:54:00:30:80:22 -> 74:d4:35:9d:21:ac
00:02:43:142932: l2-input
l2-input: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22
00:02:43:142934: l2-learn
l2-learn: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22 bd_index 1
00:02:43:142935: l2-fwd
l2-fwd: sw_if_index 2 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22 bd_index 1
result [0x1000000000001, 1] none
00:02:43:142936: l2-output
l2-output: sw_if_index 1 dst 74:d4:35:9d:21:ac src 52:54:00:30:80:22 data 08 0
0 45 00 00 54 38 0b 00 00 40 01
00:02:43:142937: host-data0-output
host-data0 l2_hdr_offset_valid l3_hdr_offset_valid
IP4: 52:54:00:30:80:22 -> 74:d4:35:9d:21:ac
ICMP: 10.3.72.59 -> 10.3.72.254
tos 0x00, ttl 64, length 84, checksum 0x9d5f
fragment id 0x380b
ICMP echo_reply checksum 0x3841
Here is a features configured:
vpp# show interface tap0 features
Feature paths configured on tap0...
nsh-eth-output:
none configured
nsh-output:
none configured
mpls-output:
none configured
mpls-input:
mpls-not-enabled
arp:
arp-disabled
ip6-drop:
none configured
ip6-punt:
none configured
ip6-local:
none configured
ip6-output:
none configured
ip6-multicast:
ip6-not-enabled
ip6-unicast:
ip6-not-enabled
ip4-drop:
none configured
ip4-punt:
none configured
ip4-local:
none configured
ip4-output:
none configured
ip4-multicast:
ip4-not-enabled
ip4-unicast:
ip4-not-enabled
l2-output-nonip:
none configured
l2-input-nonip:
none configured
l2-output-ip6:
none configured
l2-input-ip6:
none configured
l2-output-ip4:
none configured
l2-input-ip4:
none configured
ethernet-output:
none configured
interface-output:
mactime-tx
device-input:
mactime
l2-input:
LEARN (l2-learn)
FWD (l2-fwd)
UU_FLOOD (l2-flood)
FLOOD (l2-flood)
l2-output:
OUTPUT (interface-output)
vpp# show node counters
Count Node Reason
10971 mactime-tx Permitted packets
14413 l2-output L2 output packets
14510 l2-learn L2 learn packets
147 l2-learn L2 learn misses
17 l2-learn L2 mac moves
14510 l2-input L2 input packets
13 l2-fwd Reflection Drop
12872 l2-flood L2 flood packets
84 l2-flood L2 replication complete
As is seen from counters there is no mactime (rx part) counters.
Any ideas ?
On Tue, Nov 12, 2019 at 10:25 AM Damjan Marion <dmar...@me.com> wrote:
>
>
>
> > On 12 Nov 2019, at 08:57, Dimitar Ivanov <d...@telco.com> wrote:
> >
> > Hi All,
> > I need a help in investigation of one problem with TAP interface. I try to
> > develop plugin that inspects packets send from Host Linux via TAP interface
> > and take some actions on them. Scenario is like this:
> > Linux Host Tap -->vpp tap0 --> other vpp interface. My node is set to be
> > visited before 'ethernet-input'. Strange is that when Linux starts to send
> > packets over tap interface my node is not called. I have checked counters
> > of all nodes and see that event ethernet-input node counters are not
> > increment. Only nodes that are activated (regarding counters) are l2-input,
> > l2-fwd and etc.
> > I was with impression that my code is not correct. In order to isolate
> > mistakes from my side, i have activate mactime feature on same interface.
> > The result was that mactime-tx is activated, but mactime - not. What is
> > special on tap interface and why flow is not same like other interfaces ?
> > Do You have some suggestion how to install my node in order to be on RX
> > flow of TAP interface ? VPP version is v19.08.1. -=-=-=-=-=-=-=-=-=-=-=-
> > Links: You receive all messages sent to this group.
>
> It may be that you are using old tap code which doesn’t support device-input
> feature arc.
>
> Do you use “create tap ...” command?
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