Reorganize source tree to use single autotools instance

Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 228 insertions, 0 deletions

diff --git a/src/vnet/ip/ip_checksum.c b/src/vnet/ip/ip_checksum.c
new file mode 100644
index 00000000000..6a9cf657a5c
--- /dev/null
+++ b/src/vnet/ip/ip_checksum.c
@@ -0,0 +1,228 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * ip4/ip_checksum.c: ip/tcp/udp checksums
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vnet/ip/ip.h>
+
+ip_csum_t
+ip_incremental_checksum (ip_csum_t sum, void *_data, uword n_bytes)
+{
+  uword data = pointer_to_uword (_data);
+  ip_csum_t sum0, sum1;
+
+  sum0 = 0;
+  sum1 = sum;
+
+  /* Align data pointer to 64 bits. */
+#define _(t)					\
+do {						\
+  if (n_bytes >= sizeof (t)			\
+      && sizeof (t) < sizeof (ip_csum_t)	\
+      && (data % (2 * sizeof (t))) != 0)	\
+    {						\
+      sum0 += * uword_to_pointer (data, t *);	\
+      data += sizeof (t);			\
+      n_bytes -= sizeof (t);			\
+    }						\
+} while (0)
+
+  _(u8);
+  _(u16);
+  if (BITS (ip_csum_t) > 32)
+    _(u32);
+
+#undef _
+
+  {
+    ip_csum_t *d = uword_to_pointer (data, ip_csum_t *);
+
+    while (n_bytes >= 2 * sizeof (d[0]))
+      {
+	sum0 = ip_csum_with_carry (sum0, d[0]);
+	sum1 = ip_csum_with_carry (sum1, d[1]);
+	d += 2;
+	n_bytes -= 2 * sizeof (d[0]);
+      }
+
+    data = pointer_to_uword (d);
+  }
+
+#define _(t)								\
+do {									\
+  if (n_bytes >= sizeof (t) && sizeof (t) <= sizeof (ip_csum_t))	\
+    {									\
+      sum0 = ip_csum_with_carry (sum0, * uword_to_pointer (data, t *));	\
+      data += sizeof (t);						\
+      n_bytes -= sizeof (t);						\
+    }									\
+} while (0)
+
+  if (BITS (ip_csum_t) > 32)
+    _(u64);
+  _(u32);
+  _(u16);
+  _(u8);
+
+#undef _
+
+  /* Combine even and odd sums. */
+  sum0 = ip_csum_with_carry (sum0, sum1);
+
+  return sum0;
+}
+
+ip_csum_t
+ip_csum_and_memcpy (ip_csum_t sum, void *dst, void *src, uword n_bytes)
+{
+  uword n_left;
+  ip_csum_t sum0 = sum, sum1;
+  n_left = n_bytes;
+
+  if (n_left && (pointer_to_uword (dst) & sizeof (u8)))
+    {
+      u8 *d8, val;
+
+      d8 = dst;
+      val = ((u8 *) src)[0];
+      d8[0] = val;
+      dst += 1;
+      src += 1;
+      n_left -= 1;
+      sum0 =
+	ip_csum_with_carry (sum0, val << (8 * CLIB_ARCH_IS_LITTLE_ENDIAN));
+    }
+
+  while ((n_left >= sizeof (u16))
+	 && (pointer_to_uword (dst) & (sizeof (sum) - sizeof (u16))))
+    {
+      u16 *d16, *s16;
+
+      d16 = dst;
+      s16 = src;
+
+      d16[0] = clib_mem_unaligned (&s16[0], u16);
+
+      sum0 = ip_csum_with_carry (sum0, d16[0]);
+      dst += sizeof (u16);
+      src += sizeof (u16);
+      n_left -= sizeof (u16);
+    }
+
+  sum1 = 0;
+  while (n_left >= 2 * sizeof (sum))
+    {
+      ip_csum_t dst0, dst1;
+      ip_csum_t *dst_even, *src_even;
+
+      dst_even = dst;
+      src_even = src;
+      dst0 = clib_mem_unaligned (&src_even[0], ip_csum_t);
+      dst1 = clib_mem_unaligned (&src_even[1], ip_csum_t);
+
+      dst_even[0] = dst0;
+      dst_even[1] = dst1;
+
+      dst += 2 * sizeof (dst_even[0]);
+      src += 2 * sizeof (dst_even[0]);
+      n_left -= 2 * sizeof (dst_even[0]);
+
+      sum0 = ip_csum_with_carry (sum0, dst0);
+      sum1 = ip_csum_with_carry (sum1, dst1);
+    }
+
+  sum0 = ip_csum_with_carry (sum0, sum1);
+  while (n_left >= 1 * sizeof (sum))
+    {
+      ip_csum_t dst0, *dst_even, *src_even;
+
+      dst_even = dst;
+      src_even = src;
+
+      dst0 = clib_mem_unaligned (&src_even[0], ip_csum_t);
+
+      dst_even[0] = dst0;
+
+      dst += 1 * sizeof (sum);
+      src += 1 * sizeof (sum);
+      n_left -= 1 * sizeof (sum);
+
+      sum0 = ip_csum_with_carry (sum0, dst0);
+    }
+
+  while (n_left >= sizeof (u16))
+    {
+      u16 dst0, *dst_short, *src_short;
+
+      dst_short = dst;
+      src_short = src;
+
+      dst0 = clib_mem_unaligned (&src_short[0], u16);
+
+      dst_short[0] = dst0;
+
+      sum0 = ip_csum_with_carry (sum0, dst_short[0]);
+      dst += 1 * sizeof (dst0);
+      src += 1 * sizeof (dst0);
+      n_left -= 1 * sizeof (dst0);
+
+    }
+
+  if (n_left == 1)
+    {
+      u8 *d8, *s8, val;
+
+      d8 = dst;
+      s8 = src;
+
+      d8[0] = val = s8[0];
+      d8 += 1;
+      s8 += 1;
+      n_left -= 1;
+      sum0 = ip_csum_with_carry (sum0, val << (8 * CLIB_ARCH_IS_BIG_ENDIAN));
+    }
+
+  return sum0;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */