vpp/extras/pg/checksum_offload.pg
Dave Barach 08eb2bb205 pg: set vnet buffer flags in pg streams
See .../extras/pg/checksum_offload.pg for a nontrivial example, which
deliberately sets bogus ip and udp checksums in the generated packets,
then fixes the mess with (software emulated) hardware checksum
offload.

Validated via "pcap dispatch trace on max 1000 buffer-trace pg-input 100".
Packets stuffed into loop1-output have the configured bogus ip and udp
checksums. vnet_calc_checksums_inline(...) fixes the checksums, which
are correct when packets visit loop1-tx.

The packet generator is a dumb robot in this regard. If you ask for a
ridiculous flag combination - example: ip4 and ip6 - your mileage may
vary.

Type: feature

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I6d9e790f373bcd9e445a89113ca8e4c8f9aa9419
2020-04-15 19:19:29 +00:00

27 lines
603 B
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set term pag off
loop cre
set int ip address loop0 11.22.33.1/24
set int state loop0 up
loop cre
set int ip address loop1 11.22.34.1/24
set int state loop1 up
set ip neighbor loop1 11.22.34.44 03:00:11:22:34:44
packet-generator new {
name s0
limit 10000
size 128-128
interface loop0
tx-interface loop1
node loop1-output
buffer-flags ip4 offload-ip-cksum offload-udp-cksum
data { IP4: 1.2.3 -> 4.5.6
UDP: 11.22.33.44 -> 11.22.34.44
ttl 2 checksum 13
UDP: 1234 -> 2345
checksum 11
incrementing 114
}
}