flow-hash: Add symmetric flag for flow hashing

[vpp.git] / src / vnet / ip / ip6.h

diff --git a/src/vnet/ip/ip6.h b/src/vnet/ip/ip6.h
index 6f6724b..6e0cfff 100644 (file)
--- a/src/vnet/ip/ip6.h
+++ b/src/vnet/ip/ip6.h
@@ -40,7 +40,6 @@
 #ifndef included_ip_ip6_h
 #define included_ip_ip6_h
 
-#include <vlib/mc.h>
 #include <vlib/buffer.h>
 #include <vnet/ethernet/packet.h>
 #include <vnet/ip/ip6_packet.h>
@@ -50,6 +49,7 @@
 #include <vppinfra/bihash_24_8.h>
 #include <vppinfra/bihash_template.h>
 #include <vnet/util/radix.h>
+#include <vnet/util/throttle.h>
 
 /*
  * Default size of the ip6 fib hash table
@@ -219,8 +219,13 @@ typedef struct ip6_main_t
 
   /* HBH processing enabled? */
   u8 hbh_enabled;
+
+  /** ND throttling */
+  throttle_t nd_throttle;
 } ip6_main_t;
 
+#define ND_THROTTLE_BITS 512
+
 /* Global ip6 main structure. */
 extern ip6_main_t ip6_main;
 
@@ -354,7 +359,7 @@ ip6_address_t *ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index);
 int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);
 
 clib_error_t *ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst,
-                                 u32 sw_if_index);
+                                 u32 sw_if_index, u8 refresh);
 
 uword
 ip6_udp_register_listener (vlib_main_t * vm,
@@ -463,7 +468,6 @@ ip6_compute_flow_hash (const ip6_header_t * ip,
 
   a = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t2 : t1;
   b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;
-  b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? protocol : 0;
 
   t1 = is_tcp_udp ? tcp->src : 0;
   t2 = is_tcp_udp ? tcp->dst : 0;
@@ -471,6 +475,23 @@ ip6_compute_flow_hash (const ip6_header_t * ip,
   t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
   t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;
 
+  if (flow_hash_config & IP_FLOW_HASH_SYMMETRIC)
+    {
+      if (b < a)
+       {
+         c = a;
+         a = b;
+         b = c;
+       }
+      if (t2 < t1)
+       {
+         t2 += t1;
+         t1 = t2 - t1;
+         t2 = t2 - t1;
+       }
+    }
+
+  b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? protocol : 0;
   c = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ?
     ((t1 << 16) | t2) : ((t2 << 16) | t1);
 
@@ -611,10 +632,10 @@ vlib_buffer_push_ip6 (vlib_main_t * vm, vlib_buffer_t * b,
 
   ip6h->hop_limit = 0xff;
   ip6h->protocol = proto;
-  clib_memcpy (ip6h->src_address.as_u8, src->as_u8,
-              sizeof (ip6h->src_address));
-  clib_memcpy (ip6h->dst_address.as_u8, dst->as_u8,
-              sizeof (ip6h->src_address));
+  clib_memcpy_fast (ip6h->src_address.as_u8, src->as_u8,
+                   sizeof (ip6h->src_address));
+  clib_memcpy_fast (ip6h->dst_address.as_u8, dst->as_u8,
+                   sizeof (ip6h->src_address));
   b->flags |= VNET_BUFFER_F_IS_IP6;
 
   return ip6h;