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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Defines InterceptionManager, the class in charge of setting up interceptions
+// for the sandboxed process. For more datails see
+// http://wiki/Main/ChromeSandboxInterceptionDesign
+
+#ifndef SANDBOX_SRC_INTERCEPTION_INTERNAL_H__
+#define SANDBOX_SRC_INTERCEPTION_INTERNAL_H__
+
+#include "sandbox/src/sandbox_types.h"
+
+namespace sandbox {
+
+const int kMaxThunkDataBytes = 64;
+
+// The following structures contain variable size fields at the end, and will be
+// used to transfer information between two processes. In order to guarantee
+// our ability to follow the chain of structures, the alignment should be fixed,
+// hence this pragma.
+#pragma pack(push, 4)
+
+// Structures for the shared memory that contains patching information
+// for the InterceptionAgent.
+// A single interception:
+struct FunctionInfo {
+  size_t record_bytes;            // rounded to sizeof(size_t) bytes
+  InterceptionType type;
+  const void* interceptor_address;
+  char function[1];               // placeholder for null terminated name
+  // char interceptor[]           // followed by the interceptor function
+};
+
+// A single dll:
+struct DllPatchInfo {
+  size_t record_bytes;            // rounded to sizeof(size_t) bytes
+  size_t offset_to_functions;
+  int num_functions;
+  wchar_t dll_name[1];            // placeholder for null terminated name
+  // FunctionInfo function_info[] // followed by the functions to intercept
+};
+
+// All interceptions:
+struct SharedMemory {
+  int num_intercepted_dlls;
+  void* interceptor_base;
+  DllPatchInfo dll_list[1];       // placeholder for the list of dlls
+};
+
+// Dummy single thunk:
+struct ThunkData {
+  char data[kMaxThunkDataBytes];
+};
+
+// In-memory representation of the interceptions for a given dll:
+struct DllInterceptionData {
+  size_t data_bytes;
+  size_t used_bytes;
+  void* base;
+  int num_thunks;
+  ThunkData thunks[1];
+};
+
+#pragma pack(pop)
+
+}  // namespace sandbox
+
+#endif  // SANDBOX_SRC_INTERCEPTION_INTERNAL_H__