From: Jesse Gross <jesse@nicira.com>
Date: Fri, 23 Mar 2012 20:25:31 +0000 (-0700)
Subject: flow: Enable retrieval of TCP flags from IPv6 traffic.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11460e2316b88f0bd0ea0005d94338d800ea16bd;p=openvswitch

flow: Enable retrieval of TCP flags from IPv6 traffic.

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@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
---

diff --git a/datapath/flow.c b/datapath/flow.c
index 27a8f249..86cbd784 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 d73050a3..a38e56bb 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;