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diff --git a/sql/rpl_constants.h b/sql/rpl_constants.h
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+/* Copyright (c) 2007 MySQL AB, 2008 Sun Microsystems, Inc.
+   Use is subject to license terms.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#ifndef RPL_CONSTANTS_H
+#define RPL_CONSTANTS_H
+
+#include <my_sys.h>
+#include <my_crypt.h>
+
+/**
+   Enumeration of the incidents that can occur for the server.
+ */
+enum Incident {
+  /** No incident */
+  INCIDENT_NONE = 0,
+
+  /** There are possibly lost events in the replication stream */
+  INCIDENT_LOST_EVENTS = 1,
+
+  /** Shall be last event of the enumeration */
+  INCIDENT_COUNT
+};
+
+
+/**
+   Enumeration of the reserved formats of Binlog extra row information
+*/
+enum ExtraRowInfoFormat {
+
+  /** Reserved formats  0 -> 63 inclusive */
+  ERIF_LASTRESERVED =  63,
+
+  /**
+      Available / uncontrolled formats
+      64 -> 254 inclusive
+  */
+  ERIF_OPEN1        =  64,
+  ERIF_OPEN2        =  65,
+
+  ERIF_LASTOPEN     =  254,
+
+  /**
+     Multi-payload format 255
+
+      Length is total length, payload is sequence of
+      sub-payloads with their own headers containing
+      length + format.
+  */
+  ERIF_MULTI        =  255
+};
+
+/*
+   1 byte length, 1 byte format
+   Length is total length in bytes, including 2 byte header
+   Length values 0 and 1 are currently invalid and reserved.
+*/
+#define EXTRA_ROW_INFO_LEN_OFFSET 0
+#define EXTRA_ROW_INFO_FORMAT_OFFSET 1
+#define EXTRA_ROW_INFO_HDR_BYTES 2
+#define EXTRA_ROW_INFO_MAX_PAYLOAD (255 - EXTRA_ROW_INFO_HDR_BYTES)
+
+enum enum_binlog_checksum_alg {
+  BINLOG_CHECKSUM_ALG_OFF= 0,    // Events are without checksum though its generator
+                                 // is checksum-capable New Master (NM).
+  BINLOG_CHECKSUM_ALG_CRC32= 1,  // CRC32 of zlib algorithm.
+  BINLOG_CHECKSUM_ALG_ENUM_END,  // the cut line: valid alg range is [1, 0x7f].
+  BINLOG_CHECKSUM_ALG_UNDEF= 255 // special value to tag undetermined yet checksum
+                                 // or events from checksum-unaware servers
+};
+
+#define BINLOG_CRYPTO_SCHEME_LENGTH 1
+#define BINLOG_KEY_VERSION_LENGTH   4
+#define BINLOG_IV_LENGTH            MY_AES_BLOCK_SIZE
+#define BINLOG_IV_OFFS_LENGTH       4
+#define BINLOG_NONCE_LENGTH         (BINLOG_IV_LENGTH - BINLOG_IV_OFFS_LENGTH)
+
+struct Binlog_crypt_data {
+  uint  scheme;
+  uint  key_version, key_length, ctx_size;
+  uchar key[MY_AES_MAX_KEY_LENGTH];
+  uchar nonce[BINLOG_NONCE_LENGTH];
+
+  int init(uint sch, uint kv)
+  {
+    scheme= sch;
+    ctx_size= encryption_ctx_size(ENCRYPTION_KEY_SYSTEM_DATA, kv);
+    key_version= kv;
+    key_length= sizeof(key);
+    return encryption_key_get(ENCRYPTION_KEY_SYSTEM_DATA, kv, key, &key_length);
+  }
+
+  void set_iv(uchar* iv, uint32 offs) const
+  {
+    memcpy(iv, nonce, BINLOG_NONCE_LENGTH);
+    int4store(iv + BINLOG_NONCE_LENGTH, offs);
+  }
+};
+
+#endif /* RPL_CONSTANTS_H */