From: Frank Guo <[email protected]>
Currenlty Ovs-windows can not change tos using NXM_OF_IP_TOS, this patch fixes
it.
1, test with the following flow :
ovs-ofctl.exe add-flow br-int "table=0,priority=300,in_port=antrea-gw0,icmp
actions=mod_nw_tos:28,load:0x1->NXM_NX_REG0[0..3],resubmit(,SpoofGuard)"
2, capture packet trace on destination side :
02:23:30.625049 IP (tos 0x1c, ttl 128, id 15237, offset 0, flags [none], proto
ICMP (1), length 60)
192.168.250.1 > 192.168.248.1: ICMP echo request, id 1, seq 10, length 40
Reported-at:openvswitch/ovs-issues#244
Signed-off-by: Frank Guo <[email protected]>
---
datapath-windows/ovsext/Actions.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/datapath-windows/ovsext/Actions.c
b/datapath-windows/ovsext/Actions.c
index 70ac0a0e5..218e7db81 100644
--- a/datapath-windows/ovsext/Actions.c
+++ b/datapath-windows/ovsext/Actions.c
@@ -1712,6 +1712,15 @@ OvsUpdateIPv4Header(OvsForwardingContext *ovsFwdCtx,
ipHdr->ttl = ipAttr->ipv4_ttl;
key->ipKey.nwTtl = ipAttr->ipv4_ttl;
}
+ if (ipHdr->dscp != (ipAttr->ipv4_tos & 0xfc)) {
+ /* ECN + DSCP */
+ UINT8 newTos = (ipHdr->tos & 0x3) | (ipAttr->ipv4_tos & 0xfc);
+ if (ipHdr->check != 0) {
+ ipHdr->check = ChecksumUpdate16(ipHdr->check, ipHdr->tos, newTos);
+ }
+ ipHdr->tos = newTos;
+ key->ipKey.nwTos = newTos;
+ }
return NDIS_STATUS_SUCCESS;
}
--
2.25.1
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