cnat: Destination based NAT

Type: feature

Signed-off-by: Neale Ranns <nranns@cisco.com>
Change-Id: I64a99a4fbc674212944247793fd5c1fb701408cb

1 files changed, 112 insertions, 0 deletions

diff --git a/src/plugins/cnat/bihash_40_48.h b/src/plugins/cnat/bihash_40_48.h
new file mode 100644
index 00000000000..df345cec357
--- /dev/null
+++ b/src/plugins/cnat/bihash_40_48.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef BIHASH_TYPE
+#undef BIHASH_KVP_PER_PAGE
+#undef BIHASH_32_64_SVM
+#undef BIHASH_ENABLE_STATS
+#undef BIHASH_KVP_AT_BUCKET_LEVEL
+#undef BIHASH_LAZY_INSTANTIATE
+#undef BIHASH_BUCKET_PREFETCH_CACHE_LINES
+
+#define BIHASH_TYPE _40_48
+#define BIHASH_KVP_PER_PAGE 2
+#define BIHASH_KVP_AT_BUCKET_LEVEL 1
+#define BIHASH_LAZY_INSTANTIATE 1
+#define BIHASH_BUCKET_PREFETCH_CACHE_LINES 2
+
+#ifndef __included_bihash_40_48_h__
+#define __included_bihash_40_48_h__
+
+#include <vppinfra/crc32.h>
+#include <vppinfra/heap.h>
+#include <vppinfra/format.h>
+#include <vppinfra/pool.h>
+#include <vppinfra/xxhash.h>
+
+typedef struct
+{
+  u64 key[5];
+  u64 value[6];
+} clib_bihash_kv_40_48_t;
+
+static inline int
+clib_bihash_is_free_40_48 (const clib_bihash_kv_40_48_t * v)
+{
+  /* Free values are clib_memset to 0xff, check a bit... */
+  if (v->key[0] == ~0ULL && v->value[0] == ~0ULL)
+    return 1;
+  return 0;
+}
+
+static inline u64
+clib_bihash_hash_40_48 (const clib_bihash_kv_40_48_t * v)
+{
+#ifdef clib_crc32c_uses_intrinsics
+  return clib_crc32c ((u8 *) v->key, 40);
+#else
+  u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4];
+  return clib_xxhash (tmp);
+#endif
+}
+
+static inline u8 *
+format_bihash_kvp_40_48 (u8 * s, va_list * args)
+{
+  clib_bihash_kv_40_48_t *v = va_arg (*args, clib_bihash_kv_40_48_t *);
+
+  s =
+    format (s,
+	    "key %llu %llu %llu %llu %llu value %llu %llu %llu %llu %llu %u",
+	    v->key[0], v->key[1], v->key[2], v->key[3], v->key[4],
+	    v->value[0], v->value[1], v->value[2], v->value[3], v->value[4],
+	    v->value[5]);
+  return s;
+}
+
+static inline int
+clib_bihash_key_compare_40_48 (u64 * a, u64 * b)
+{
+#if defined (CLIB_HAVE_VEC512)
+  u64x8 v;
+  v = u64x8_load_unaligned (a) ^ u64x8_load_unaligned (b);
+  return (u64x8_is_zero_mask (v) & 0x1f) == 0;
+#elif defined (CLIB_HAVE_VEC256)
+  u64x4 v = { a[4] ^ b[4], 0, 0, 0 };
+  v |= u64x4_load_unaligned (a) ^ u64x4_load_unaligned (b);
+  return u64x4_is_all_zero (v);
+#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE)
+  u64x2 v = { a[4] ^ b[4], 0 };
+  v |= u64x2_load_unaligned (a) ^ u64x2_load_unaligned (b);
+  v |= u64x2_load_unaligned (a + 2) ^ u64x2_load_unaligned (b + 2);
+  return u64x2_is_all_zero (v);
+#else
+  return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3])
+	  | (a[4] ^ b[4])) == 0;
+#endif
+}
+
+#undef __included_bihash_template_h__
+#include <vppinfra/bihash_template.h>
+
+#endif /* __included_bihash_40_48_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */