ip: fix udp/tcp checksum corner cases

When checksumming chained buffers with odd lengths: insert a
NULL byte, or the calculation fails.

Type: fix

Signed-off-by: Dave Barach <dave@barachs.net>
Signed-off-by: John Lo <loj@cisco.com>
Change-Id: I380f7c42897bdb28c8c29aa1c4cdaaa849cc9ecc

1 files changed, 60 insertions, 0 deletions

diff --git a/src/plugins/oddbuf/oddbuf.h b/src/plugins/oddbuf/oddbuf.h
new file mode 100644
index 00000000000..1aa51e4fe07
--- /dev/null
+++ b/src/plugins/oddbuf/oddbuf.h
@@ -0,0 +1,60 @@
+
+/*
+ * oddbuf.h - skeleton vpp engine plug-in header file
+ *
+ * Copyright (c) <current-year> <your-organization>
+ * 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.
+ */
+#ifndef __included_oddbuf_h__
+#define __included_oddbuf_h__
+
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/udp/udp.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+
+typedef struct
+{
+  /* API message ID base */
+  u16 msg_id_base;
+
+  /* on/off switch for the periodic function */
+  u8 periodic_timer_enabled;
+
+  /* config parameters */
+  int n_to_copy;
+  int second_chunk_offset;
+  int first_chunk_offset;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+  ethernet_main_t *ethernet_main;
+} oddbuf_main_t;
+
+extern oddbuf_main_t oddbuf_main;
+
+extern vlib_node_registration_t oddbuf_node;
+
+#endif /* __included_oddbuf_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */