+
+out:
+ ovs_rwlock_unlock(&rwlock);
+ return ofport;
+}
+
+static bool
+tnl_ecn_ok(const struct flow *base_flow, struct flow *flow,
+ struct flow_wildcards *wc)
+{
+ if (is_ip_any(base_flow)) {
+ if ((flow->tunnel.ip_tos & IP_ECN_MASK) == IP_ECN_CE) {
+ wc->masks.nw_tos |= IP_ECN_MASK;
+ 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)
+{
+ /* tnl_port_should_receive() examines the 'tunnel.ip_dst' field to
+ * determine the presence of the tunnel metadata. However, since tunnels'
+ * datapath port numbers are different from the non-tunnel ports, and we
+ * always unwildcard the 'in_port', we do not need to unwildcard
+ * the 'tunnel.ip_dst' for non-tunneled packets. */
+ if (tnl_port_should_receive(flow)) {
+ wc->masks.tunnel.tun_id = OVS_BE64_MAX;
+ wc->masks.tunnel.ip_src = OVS_BE32_MAX;
+ wc->masks.tunnel.ip_dst = OVS_BE32_MAX;
+ wc->masks.tunnel.flags = (FLOW_TNL_F_DONT_FRAGMENT |
+ FLOW_TNL_F_CSUM |
+ FLOW_TNL_F_KEY);
+ wc->masks.tunnel.ip_tos = UINT8_MAX;
+ wc->masks.tunnel.ip_ttl = UINT8_MAX;
+
+ memset(&wc->masks.pkt_mark, 0xff, sizeof wc->masks.pkt_mark);
+
+ if (!tnl_ecn_ok(base_flow, flow, wc)) {
+ return false;
+ }
+
+ flow->pkt_mark &= ~IPSEC_MARK;
+ }
+
+ return true;