ipsec: add spd fast path matching

This patch adds matching functionality for spd fast path
policy matching. Fast path matching has been introduced
for outbound traffic only.

Type: feature
Signed-off-by: Piotr Bronowski <piotrx.bronowski@intel.com>
Change-Id: I03d5edf7d7fbc03bf3e6edbe33cb15bc965f9d4e

1 files changed, 26 insertions, 0 deletions

diff --git a/src/vnet/ipsec/ipsec_output.c b/src/vnet/ipsec/ipsec_output.c
index d2eb412bb18..96c6f27fee1 100644
--- a/src/vnet/ipsec/ipsec_output.c
+++ b/src/vnet/ipsec/ipsec_output.c
@@ -74,6 +74,20 @@ ip6_addr_match_range (ip6_address_t * a, ip6_address_t * la,
   return 0;
 }
 
+always_inline void
+ipsec_fp_5tuple_from_ip6_range (ipsec_fp_5tuple_t *tuple, ip6_address_t *la,
+				ip6_address_t *ra, u16 lp, u16 rp, u8 pr)
+
+{
+  clib_memcpy_fast (&tuple->ip6_laddr, la, sizeof (ip6_address_t));
+  clib_memcpy_fast (&tuple->ip6_laddr, la, sizeof (ip6_address_t));
+
+  tuple->lport = lp;
+  tuple->rport = rp;
+  tuple->protocol = pr;
+  tuple->is_ipv6 = 1;
+}
+
 always_inline ipsec_policy_t *
 ipsec6_output_policy_match (ipsec_spd_t * spd,
 			    ip6_address_t * la,
@@ -81,12 +95,24 @@ ipsec6_output_policy_match (ipsec_spd_t * spd,
 {
   ipsec_main_t *im = &ipsec_main;
   ipsec_policy_t *p;
+  ipsec_policy_t *policies[1];
+  ipsec_fp_5tuple_t tuples[1];
+  u32 fp_policy_ids[1];
 
   u32 *i;
 
   if (!spd)
     return 0;
 
+  ipsec_fp_5tuple_from_ip6_range (&tuples[0], la, ra, lp, rp, pr);
+  if (im->fp_spd_is_enabled &&
+      (0 == ipsec_fp_out_policy_match_n (&spd->fp_spd, 1, tuples, policies,
+					 fp_policy_ids, 1)))
+    {
+      p = policies[0];
+      i = fp_policy_ids;
+    }
+
   vec_foreach (i, spd->policies[IPSEC_SPD_POLICY_IP6_OUTBOUND])
   {
     p = pool_elt_at_index (im->policies, *i);