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man: tc-csum.8: Add an example

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Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
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Phil Sutter 2016-03-22 15:48:34 +01:00 committed by Stephen Hemminger
parent 1672f42195
commit dbfb17a67f
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man/man8/tc-csum.8
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@ -49,6 +49,21 @@ UDPLite header
.TP
.B SWEETS
These are merely syntactic sugar and ignored internally.
.SH EXAMPLES
The following performs stateless NAT for incoming packets from 192.168.1.100 to
new destination 18.52.86.120 (0x12345678 in hex). Assuming these are UDP
packets, both IP and UDP checksums have to be recalculated:
.RS
.EX
# tc qdisc add dev eth0 ingress handle ffff:
# tc filter add eth0 prio 1 protocol ip parent ffff: \\
u32 match ip src 192.168.1.100/32 flowid :1 \\
action pedit munge ip dst set 0x12345678 pipe \\
csum ip and udp
.EE
.RE
.SH SEE ALSO
.BR tc (8),
.BR tc-pedit (8)