ip: support flow-hash gtpv1teid

[vpp.git] / src / vnet / ip / ip6_inlines.h

diff --git a/src/vnet/ip/ip6_inlines.h b/src/vnet/ip/ip6_inlines.h
index 9c2be60..4a2b91b 100644 (file)
--- a/src/vnet/ip/ip6_inlines.h
+++ b/src/vnet/ip/ip6_inlines.h
@@ -50,14 +50,16 @@ ip6_compute_flow_hash (const ip6_header_t * ip,
                       flow_hash_config_t flow_hash_config)
 {
   tcp_header_t *tcp;
+  udp_header_t *udp = (void *) (ip + 1);
+  gtpv1u_header_t *gtpu = (void *) (udp + 1);
   u64 a, b, c;
   u64 t1, t2;
+  u32 t3;
   uword is_tcp_udp = 0;
+  uword is_udp = ip->protocol == IP_PROTOCOL_UDP;
   u8 protocol = ip->protocol;
 
-  if (PREDICT_TRUE
-      ((ip->protocol == IP_PROTOCOL_TCP)
-       || (ip->protocol == IP_PROTOCOL_UDP)))
+  if (PREDICT_TRUE ((ip->protocol == IP_PROTOCOL_TCP) || is_udp))
     {
       is_tcp_udp = 1;
       tcp = (void *) (ip + 1);
@@ -113,7 +115,13 @@ ip6_compute_flow_hash (const ip6_header_t * ip,
     ((flow_hash_config & IP_FLOW_HASH_FL) ? ip6_flow_label_network_order (ip) :
                                            0);
   c ^= t1;
-
+  if (PREDICT_TRUE (is_udp) &&
+      PREDICT_FALSE ((flow_hash_config & IP_FLOW_HASH_GTPV1_TEID) &&
+                    udp->dst_port == GTPV1_PORT_BE))
+    {
+      t3 = gtpu->teid;
+      a ^= t3;
+    }
   hash_mix64 (a, b, c);
   return (u32) c;
 }