Is the trace edited? It does not make a lot of sense to me. Also, if you want to route the packet, why do you go through ip-local? Are you trying to do static DNAT? If so, Ole recently added this capability, see src/plugins/nat/pnat/
ben > -----Original Message----- > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Vijay Kumar > Sent: vendredi 12 février 2021 12:47 > To: Benoit Ganne (bganne) <bga...@cisco.com> > Cc: vpp-dev <vpp-dev@lists.fd.io> > Subject: Re: [vpp-dev] Dropped packets when trying to send packet recvd on > memif over the VirtualEthernet interface > > Hi Benoit, > > The pkt is not destined to a locally configured address in VPP. The pkt > destination address (as shown in the logs, pkt dest is 20.20.99.215) is > that of strongswan interface and it is on the same subnet and same vlan as > that of the VPP interface (20.20.99.99) > At my plugin, I set the next-node as ip4-local and you can see the trace > showing the pkt is with ip4-local node but there after it is not going to > interface-output--->ethernet-output but rather going to drop. Not sure if > the pkt is malformed > > > > 01:06:34:500278: memif-input > > memif: hw_if_index 14 next-index 0 > > slot: ring 0 > > 01:06:34:500300: ip4-input-no-checksum > > unknown 201: 192.168.210.2 -> 192.168.210.1 > > tos 0x00, ttl 64, length 64464, checksum 0x590f dscp CS0 ecn NON_ECN > > fragment id 0x0000 > > 01:06:34:500303: ip4-lookup > > fib 0 dpo-idx 25 flow hash: 0x00000000 > > unknown 201: 192.168.210.2 -> 192.168.210.1 > > tos 0x00, ttl 64, length 64464, checksum 0x590f dscp CS0 ecn NON_ECN > > fragment id 0x0000 > > 01:06:34:500304: ip4-local > > unknown 201: 192.168.210.2 -> 192.168.210.1 > > tos 0x00, ttl 64, length 64464, checksum 0x590f dscp CS0 ecn NON_ECN > > fragment id 0x0000 > > 01:06:34:500738: ip4-lookup > > fib 0 dpo-idx 0 flow hash: 0x00000000 > > UDP: 20.20.99.99 -> 20.20.99.215 > > tos 0x00, ttl 254, length 492, checksum 0x590f (should be 0xcb9e) dscp > CS0 ecn NON_ECN > > fragment id 0x0000 > > UDP: 500 -> 500 > > length 472, checksum 0xb45f > > 01:06:34:500739: ip4-drop > > UDP: 20.20.99.99 -> 20.20.99.215 > > tos 0x00, ttl 254, length 492, checksum 0x590f (should be 0xcb9e) > dscp CS0 ecn NON_ECN > > fragment id 0x0000 > > UDP: 500 -> 500 > > length 472, checksum 0xb45f > > 01:06:34:500740: error-drop > > rx:memif210/0 > > 01:06:34:500741: drop > > ip4-local: unknown ip protocol > > > > > On Fri, Feb 12, 2021 at 3:21 PM Benoit Ganne (bganne) <bga...@cisco.com > <mailto:bga...@cisco.com> > wrote: > > > Hi, > > I suppose the packet is destined to one of the VPP interface IPs as > it ends up on ip4-local. > In that case you're looking for punting: > https://fd.io/docs/vpp/master/gettingstarted/developers/punt.html > > Best > ben > > > -----Original Message----- > > From: vpp-dev@lists.fd.io <mailto:vpp-dev@lists.fd.io> <vpp- > d...@lists.fd.io <mailto:vpp-dev@lists.fd.io> > On Behalf Of Vijay Kumar > > Sent: vendredi 12 février 2021 09:35 > > To: vpp-dev <vpp-dev@lists.fd.io <mailto:vpp-dev@lists.fd.io> > > > Subject: [vpp-dev] Dropped packets when trying to send packet > recvd on > > memif over the VirtualEthernet interface > > > > Hi, > > > > > > From my application, I received a protocol pkt (IKE) to my graph > node via > > memif. This plugin is now supposed to send this pkt out towards > the > > strongswan peer. In the graph node, I had the next node to IP4- > lookup. > > I observed that the pkt doesnt go out. It is dropped in "error- > drop" graph > > node with reason "UNKNOWN PROTOCOL". The previous node for error- > drop was > > ip4-local. > > > > > > The show trace command shows a drop in memif rx interface > > > > > > It looks like we need to put the pkt received on memif to the > north-south > > interface which is the veth interface to be able to send out. This > is > > missing in my code. > > > > > > Is there any way where I can divert the protocol packet received > on memif > > and send it out on the virtual ethernet interface (on the wire)? > > > > > >
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