Implement a decrement operation for ttl and hoplimit.
Since this is just syntactic sugar, it goes that:
tc filter add ... action pedit ex munge ip ttl dec ...
tc filter add ... action pedit ex munge ip6 hoplimit dec ...
is just a more readable version of this:
tc filter add ... action pedit ex munge ip ttl add 0xff ...
tc filter add ... action pedit ex munge ip6 hoplimit add 0xff ...
This feature was suggested by some pseudo tc examples in Mellanox's
documentation[1], but wasn't present in neither their mlnx-iproute2
nor iproute2.
Tested with skip_sw on Mellanox ConnectX-6 Dx.
[1] https://docs.mellanox.com/pages/viewpage.action?pageId=47033989
v3:
- Use dedicated flags argument in parse_cmd() (David Ahern)
- Minor rewording of the man page
v2:
- Fix whitespace issue (Stephen Hemminger)
- Add to usage info in explain()
Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.st>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David Ahern <dsahern@kernel.org>
This patch just prepares the flags argument, so it's
available to the next patch.
Signed-off-by: Asbjørn Sloth Tønnesen <asbjorn@asbjorn.st>
Signed-off-by: David Ahern <dsahern@kernel.org>
For example, forward tcp traffic to veth0 and set
destination mac address to 11:22:33:44:55:66 :
$ tc filter add dev enp0s9 protocol ip parent ffff: \
flower \
ip_proto tcp \
action pedit ex munge \
eth dst set 11:22:33:44:55:66 \
action mirred egress \
redirect dev veth0
Signed-off-by: Amir Vadai <amir@vadai.me>
Utilize the extended pedit netlink to set an offset relative to a
specific header type. Old netlink only enabled the user to set
approximated offset relative to the IPv4 header.
To use this extended functionality need to use the 'ex' keyword after
'pedit' and before any 'munge'.
e.g:
$ tc filter add dev ens9 protocol ip parent ffff: \
flower \
ip_proto udp \
dst_port 80 \
action pedit ex munge \
ip dst set 1.1.1.1 \
pipe \
action mirred egress redirect dev veth0
Signed-off-by: Amir Vadai <amir@vadai.me>
Asbjørn Sloth Tønnesen
Stephen Hemminger
Amir Vadai
Stephen Hemminger
2!tgraf
net[shemminger]!shemminger