This error fix this situation for IPv6 checksum offload error on RHEL65
Any optimalisation above -O0 provide error in IPv6 checksum
Step 1 : start testpmd
./x86_64-native-linuxapp-gcc/app/testpmd -c 0x6 -n 4 -- -i --portmask=0x3
--disable-hw-vlan --enable-rx-cksum --crc-strip --txqflags=0
Step 2 : settings and start
set verbose 1
set fwd csum
start
Step 3 : calculate correct checksum values of IPv6/TCP and IPv6/UDP by scapy
Packets info: IPv6/UDP:Ether(dst="02:00:00:00:00:00",
src="90:e2:ba:4a:33:5c")/IPv6(src="::2")/UDP()/("X"*46)
IPv6/TCP: Ether(src="52:00:00:00:00:00",
dst="90:e2:ba:4a:33:5d")/IPv6(src="::1")/TCP()/("X"*46)
Step 4 : Send two packets with wrong checksum value,and calculate the right
checksum value by port,packets received on another port
Send packets info: IPv6/UDP?Ether(dst="90:e2:ba:4a:33:5d",
src="52:00:00:00:00:00")/IPv6(src="::1")/UDP(chksum=0xf)/("X"*46)
IPv6/TCP?Ether(dst="90:e2:ba:4a:33:5d",
src="52:00:00:00:00:00")/IPv6(src="::1")/TCP(chksum=0xf)/("X"*46)
RESULTS:
'IPv6/TCP': ['0xd41']}, 'IPv6/UDP': ['0x7d07'],
EXPECTED RESULTS:
'IPv6/TCP': ['0x9f5e']}, 'IPv6/UDP': ['0xf26']
