From: Ethan Jackson <ethan@nicira.com>
Date: Wed, 16 Nov 2011 02:35:26 +0000 (-0800)
Subject: flow: flow_extract() improperly parses IPv6 TOS bits.
X-Git-Url: http://git.onelab.eu/?a=commitdiff_plain;ds=sidebyside;h=beb010bf504f70b561b1ae8cd6da5e5e35b34d5f;p=sliver-openvswitch.git

flow: flow_extract() improperly parses IPv6 TOS bits.

This problem could cause userspace to automatically evict IPv6
flows from the datapath which had TOS bits set.

Bug #8323.
---

diff --git a/lib/flow.c b/lib/flow.c
index fc09a77a7..519c87850 100644
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -150,7 +150,7 @@ parse_ipv6(struct ofpbuf *packet, struct flow *flow)
     flow->ipv6_dst = nh->ip6_dst;
 
     tc_flow = get_unaligned_be32(&nh->ip6_flow);
-    flow->nw_tos = (ntohl(tc_flow) >> 4) & IP_DSCP_MASK;
+    flow->nw_tos = (ntohl(tc_flow) >> 20) & IP_DSCP_MASK;
     flow->nw_proto = IPPROTO_NONE;
 
     while (1) {