ofp-actions: Fix use-after-free in bundle action.

[cascardo/ovs.git] / lib / csum.h

diff --git a/lib/csum.h b/lib/csum.h
index 25de1ac..fc52086 100644 (file)
--- a/lib/csum.h
+++ b/lib/csum.h
@@ -1,17 +1,17 @@
 /*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2011, 2015 Nicira, Inc.
  *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
+ * 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:
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *     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 CSUM_H
@@ -19,13 +19,39 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include "openvswitch/types.h"
 
-uint16_t csum(const void *, size_t);
-uint32_t csum_add16(uint32_t partial, uint16_t);
-uint32_t csum_add32(uint32_t partial, uint32_t);
+ovs_be16 csum(const void *, size_t);
 uint32_t csum_continue(uint32_t partial, const void *, size_t);
-uint16_t csum_finish(uint32_t partial);
-uint16_t recalc_csum16(uint16_t old_csum, uint16_t old_u16, uint16_t new_u16);
-uint16_t recalc_csum32(uint16_t old_csum, uint32_t old_u32, uint32_t new_u32);
+ovs_be16 csum_finish(uint32_t partial);
+ovs_be16 recalc_csum16(ovs_be16 old_csum, ovs_be16 old_u16, ovs_be16 new_u16);
+ovs_be16 recalc_csum32(ovs_be16 old_csum, ovs_be32 old_u32, ovs_be32 new_u32);
+ovs_be16 recalc_csum48(ovs_be16 old_csum, const struct eth_addr old_mac,
+                       const struct eth_addr new_mac);
+ovs_be16 recalc_csum128(ovs_be16 old_csum, ovs_16aligned_be32 old_u32[4],
+                        const ovs_be32 new_u32[4]);
+
+#ifndef __CHECKER__
+/* Adds the 16 bits in 'new' to the partial IP checksum 'partial' and returns
+ * the updated checksum.  (To start a new checksum, pass 0 for 'partial'.  To
+ * obtain the finished checksum, pass the return value to csum_finish().) */
+static inline uint32_t
+csum_add16(uint32_t partial, ovs_be16 new)
+{
+    return partial + new;
+}
+
+/* Adds the 32 bits in 'new' to the partial IP checksum 'partial' and returns
+ * the updated checksum.  (To start a new checksum, pass 0 for 'partial'.  To
+ * obtain the finished checksum, pass the return value to csum_finish().) */
+static inline uint32_t
+csum_add32(uint32_t partial, ovs_be32 new)
+{
+    return partial + (new >> 16) + (new & 0xffff);
+}
+#else
+uint32_t csum_add16(uint32_t partial, ovs_be16);
+uint32_t csum_add32(uint32_t partial, ovs_be32);
+#endif
 
 #endif /* csum.h */