[ovs-dev] [PATCH 2/2] flow: Enable retrieval of TCP flags from IPv6 traffic.

[Jesse Gross]

We currently check that a packet is IPv4 and TCP before fetching the
TCP flags.  This enables fetching from IPv6 packets as well.

Bug #10194

Reported-by: Michael Mao <mmao at nicira.com>
Signed-off-by: Jesse Gross <jesse at nicira.com>
---
 datapath/flow.c   |    3 ++-
 lib/dpif-netdev.c |    3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/datapath/flow.c b/datapath/flow.c
index 27a8f24..86cbd78 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -184,7 +184,8 @@ void ovs_flow_used(struct sw_flow *flow, struct sk_buff *skb)
 {
 	u8 tcp_flags = 0;
 
-	if (flow->key.eth.type == htons(ETH_P_IP) &&
+	if ((flow->key.eth.type == htons(ETH_P_IP) ||
+	     flow->key.eth.type == htons(ETH_P_IPV6)) &&
 	    flow->key.ip.proto == IPPROTO_TCP &&
 	    likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
 		u8 *tcp = (u8 *)tcp_hdr(skb);
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index d73050a..a38e56b 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -976,7 +976,8 @@ dp_netdev_flow_used(struct dp_netdev_flow *flow, struct flow *key,
     flow->used = time_msec();
     flow->packet_count++;
     flow->byte_count += packet->size;
-    if (key->dl_type == htons(ETH_TYPE_IP) &&
+    if ((key->dl_type == htons(ETH_TYPE_IP) ||
+         key->dl_type == htons(ETH_TYPE_IPV6)) &&
         key->nw_proto == IPPROTO_TCP && packet->l7) {
         struct tcp_header *th = packet->l4;
         flow->tcp_ctl |= th->tcp_ctl;
-- 
1.7.5.4