flow: Fix IPv6 fragment packet handling

IPv6 fragmented packet (except first fragment) will not be handled
correctly. When extracting packet at parse_ipv6(), although nw_frag
should have both of FLOW_NW_FRAG_ANY and FLOW_NW_FRAG_LATER for
later fragment, only FLOW_NW_FRAG_LATER is set.

Signed-off-by: Takashi Kawaguchi <kawaguchi-takashi@mxd.nes.nec.co.jp>
Signed-off-by: Ken Ajiro <ajiro@mxw.nes.nec.co.jp>
Signed-off-by: Jesse Gross <jesse@nicira.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/lib/flow.c b/lib/flow.c
index 4e87ef2e..c664cb4f 100644
--- a/lib/flow.c
+++ b/lib/flow.c
@@ -214,9 +214,8 @@ parse_ipv6(struct ofpbuf *packet, struct flow *flow)
 
             /* We only process the first fragment. */
             if (frag_hdr->ip6f_offlg != htons(0)) {
-                if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) == htons(0)) {
-                    flow->nw_frag = FLOW_NW_FRAG_ANY;
-                } else {
+                flow->nw_frag = FLOW_NW_FRAG_ANY;
+                if ((frag_hdr->ip6f_offlg & IP6F_OFF_MASK) != htons(0)) {
                     flow->nw_frag |= FLOW_NW_FRAG_LATER;
                     nexthdr = IPPROTO_FRAGMENT;
                     break;