IPSEC: run encrpyt as a feautre on the tunnel

Change-Id: I6527e3fd8bbbca2d5f728621fc66b3856b39d505
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 106 insertions, 0 deletions

diff --git a/src/vnet/interface_output.h b/src/vnet/interface_output.h
new file mode 100644
index 00000000000..58f7f617957
--- /dev/null
+++ b/src/vnet/interface_output.h
@@ -0,0 +1,106 @@
+/*
+ * 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.
+ */
+/*
+ * interface_output.c: interface output node
+ *
+ * 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.
+ */
+
+#ifndef __INTERFACE_INLINES_H__
+#define __INTERFACE_INLINES_H__
+
+#include <vnet/vnet.h>
+
+static_always_inline void
+calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
+{
+  ip4_header_t *ip4;
+  ip6_header_t *ip6;
+  tcp_header_t *th;
+  udp_header_t *uh;
+
+  int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
+  int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
+
+  ASSERT (!(is_ip4 && is_ip6));
+
+  ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
+  ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
+  th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
+  uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
+
+  if (is_ip4)
+    {
+      ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
+      if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
+	ip4->checksum = ip4_header_checksum (ip4);
+      if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
+	{
+	  th->checksum = 0;
+	  th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+	}
+      if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
+	uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
+    }
+  if (is_ip6)
+    {
+      int bogus;
+      if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
+	{
+	  th->checksum = 0;
+	  th->checksum =
+	    ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+	}
+      if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
+	{
+	  uh->checksum = 0;
+	  uh->checksum =
+	    ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+	}
+    }
+
+  b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+  b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+  b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+}
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */