Hello,
I am using the userspace OvS (2.14.) and the userspace GTP tunnel.
I am decapsulating a GTP packet in table0 -> sending the decapsulated packet
over to Table1, where I again want to encapsulate it again (with a different
tunnel identifier) and submit to (another?) gtp port.
root@RiduxV4:~/Documents# ovs-vsctl show
3271f3b8-4aa6-40a2-af9b-37353238b104
Bridge dp2
Controller "tcp:127.0.0.1"
is_connected: true
datapath_type: netdev
Port gtpu8
Interface gtpu8
type: gtpu
options: {dst_port="2152", key=flow, remote_ip=flow}
Port dp2
Interface dp2
type: internal
Port gtpu9
Interface gtpu9
type: gtpu
options: {dst_port="2152", key="0x00",
remote_ip="192.168.177.101"}
Port ethvlan1000
Interface ethvlan1000
type: internal
root@RiduxV4:~/Documents# ovs-ofctl dump-flows dp2
cookie=0x1234, duration=277.786s, table=0, n_packets=30, n_bytes=2314,
priority=1250,ip,in_port=eth1 actions=output:ethvlan1000
cookie=0x1234, duration=277.736s, table=0, n_packets=1, n_bytes=34,
priority=1400,ip,in_port=gtpu8 actions=mod_dl_dst:99:99:99:99:99:99,resubmit(,1)
cookie=0x1234, duration=274.699s, table=1, n_packets=1, n_bytes=34,
priority=1100,ip,in_port=gtpu8,nw_dst=192.168.10.3
actions=load:0x55667701->NXM_NX_TUN_ID[],load:0xc0a8b164->NXM_NX_TUN_IPV4_DST[],output:gtpu8
So to repeat, the packet got decapsulated in table 0 and then moved over to
table1 where it should be encapsulated again.
Encapsulation and Decapsulation work, only encapsulating a decapsulated packet,
without leaving OvS does not work in Userspace.
If I select the output interface as the intput interface, OvS recognize this
and does not allow it, so far so good.
But if I select the IN_PORt or another GTP tunnel (gtpu9), OvS crashes. I could
not generate a core dump, yet.
compose_output_action__ -> xlate_commit_actions(ctx);
Is there a possiblity to implement this in the userspace? Is there a way, to
clear the actions stack, and send a fresh decapsulated packet in the
recirculation, such that OvS does not recognize that it was encapsulated before?
Looking forward for your support,
Dincer
Dincer Beken
Software Developer
t: +49 8331 99 59-852<tel:+49%208331%2099%2059-852>
e: [email protected]<mailto:[email protected]>
w: https://blackned.de
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