VLOG_DEFINE_THIS_MODULE(tunnel);
+/* skb mark used for IPsec tunnel packets */
+#define IPSEC_MARK 1
+
struct tnl_match {
ovs_be64 in_key;
ovs_be32 ip_src;
return ofport;
}
+static bool
+tnl_ecn_ok(const struct flow *base_flow, struct flow *flow)
+{
+ if (is_ip_any(base_flow)
+ && (flow->tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) {
+ if ((base_flow->nw_tos & IP_ECN_MASK) == IP_ECN_NOT_ECT) {
+ VLOG_WARN_RL(&rl, "dropping tunnel packet marked ECN CE"
+ " but is not ECN capable");
+ return false;
+ } else {
+ /* Set the ECN CE value in the tunneled packet. */
+ flow->nw_tos |= IP_ECN_CE;
+ }
+ }
+
+ return true;
+}
+
+/* Should be called at the beginning of action translation to initialize
+ * wildcards and perform any actions based on receiving on tunnel port.
+ *
+ * Returns false if the packet must be dropped. */
+bool
+tnl_xlate_init(const struct flow *base_flow, struct flow *flow,
+ struct flow_wildcards *wc)
+{
+ if (tnl_port_should_receive(flow)) {
+ memset(&wc->masks.tunnel, 0xff, sizeof wc->masks.tunnel);
+ memset(&wc->masks.pkt_mark, 0xff, sizeof wc->masks.pkt_mark);
+
+ if (!tnl_ecn_ok(base_flow, flow)) {
+ return false;
+ }
+
+ flow->pkt_mark &= ~IPSEC_MARK;
+ }
+
+ return true;
+}
+
/* Given that 'flow' should be output to the ofport corresponding to
* 'tnl_port', updates 'flow''s tunnel headers and returns the actual datapath
* port that the output should happen on. May return ODPP_NONE if the output