Adding a copy of memcached to the tree.
[awesomized/libmemcached] / memcached / protocol_binary.h
diff --git a/memcached/protocol_binary.h b/memcached/protocol_binary.h
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+/*
+ * Copyright (c) <2008>, Sun Microsystems, 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 the  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 SUN MICROSYSTEMS, INC. ``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 SUN MICROSYSTEMS, INC. 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.
+ */
+/*
+ * Summary: Constants used by to implement the binary protocol.
+ *
+ * Copy: See Copyright for the status of this software.
+ *
+ * Author: Trond Norbye <trond.norbye@sun.com>
+ */
+
+#ifndef PROTOCOL_BINARY_H
+#define PROTOCOL_BINARY_H
+
+/**
+ * This file contains definitions of the constants and packet formats
+ * defined in the binary specification. Please note that you _MUST_ remember
+ * to convert each multibyte field to / from network byte order to / from
+ * host order.
+ */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /**
+     * Definition of the legal "magic" values used in a packet.
+     * See section 3.1 Magic byte
+     */
+    typedef enum {
+        PROTOCOL_BINARY_REQ = 0x80,
+        PROTOCOL_BINARY_RES = 0x81
+    } protocol_binary_magic;
+
+    /**
+     * Definition of the valid response status numbers.
+     * See section 3.2 Response Status
+     */
+    typedef enum {
+        PROTOCOL_BINARY_RESPONSE_SUCCESS = 0x00,
+        PROTOCOL_BINARY_RESPONSE_KEY_ENOENT = 0x01,
+        PROTOCOL_BINARY_RESPONSE_KEY_EEXISTS = 0x02,
+        PROTOCOL_BINARY_RESPONSE_E2BIG = 0x03,
+        PROTOCOL_BINARY_RESPONSE_EINVAL = 0x04,
+        PROTOCOL_BINARY_RESPONSE_NOT_STORED = 0x05,
+        PROTOCOL_BINARY_RESPONSE_DELTA_BADVAL = 0x06,
+        PROTOCOL_BINARY_RESPONSE_AUTH_ERROR = 0x20,
+        PROTOCOL_BINARY_RESPONSE_AUTH_CONTINUE = 0x21,
+        PROTOCOL_BINARY_RESPONSE_UNKNOWN_COMMAND = 0x81,
+        PROTOCOL_BINARY_RESPONSE_ENOMEM = 0x82
+    } protocol_binary_response_status;
+
+    /**
+     * Defintion of the different command opcodes.
+     * See section 3.3 Command Opcodes
+     */
+    typedef enum {
+        PROTOCOL_BINARY_CMD_GET = 0x00,
+        PROTOCOL_BINARY_CMD_SET = 0x01,
+        PROTOCOL_BINARY_CMD_ADD = 0x02,
+        PROTOCOL_BINARY_CMD_REPLACE = 0x03,
+        PROTOCOL_BINARY_CMD_DELETE = 0x04,
+        PROTOCOL_BINARY_CMD_INCREMENT = 0x05,
+        PROTOCOL_BINARY_CMD_DECREMENT = 0x06,
+        PROTOCOL_BINARY_CMD_QUIT = 0x07,
+        PROTOCOL_BINARY_CMD_FLUSH = 0x08,
+        PROTOCOL_BINARY_CMD_GETQ = 0x09,
+        PROTOCOL_BINARY_CMD_NOOP = 0x0a,
+        PROTOCOL_BINARY_CMD_VERSION = 0x0b,
+        PROTOCOL_BINARY_CMD_GETK = 0x0c,
+        PROTOCOL_BINARY_CMD_GETKQ = 0x0d,
+        PROTOCOL_BINARY_CMD_APPEND = 0x0e,
+        PROTOCOL_BINARY_CMD_PREPEND = 0x0f,
+        PROTOCOL_BINARY_CMD_STAT = 0x10,
+        PROTOCOL_BINARY_CMD_SETQ = 0x11,
+        PROTOCOL_BINARY_CMD_ADDQ = 0x12,
+        PROTOCOL_BINARY_CMD_REPLACEQ = 0x13,
+        PROTOCOL_BINARY_CMD_DELETEQ = 0x14,
+        PROTOCOL_BINARY_CMD_INCREMENTQ = 0x15,
+        PROTOCOL_BINARY_CMD_DECREMENTQ = 0x16,
+        PROTOCOL_BINARY_CMD_QUITQ = 0x17,
+        PROTOCOL_BINARY_CMD_FLUSHQ = 0x18,
+        PROTOCOL_BINARY_CMD_APPENDQ = 0x19,
+        PROTOCOL_BINARY_CMD_PREPENDQ = 0x1a,
+        PROTOCOL_BINARY_CMD_TOUCH = 0x1c,
+        PROTOCOL_BINARY_CMD_GAT = 0x1d,
+        PROTOCOL_BINARY_CMD_GATQ = 0x1e,
+        PROTOCOL_BINARY_CMD_GATK = 0x23,
+        PROTOCOL_BINARY_CMD_GATKQ = 0x24,
+
+        PROTOCOL_BINARY_CMD_SASL_LIST_MECHS = 0x20,
+        PROTOCOL_BINARY_CMD_SASL_AUTH = 0x21,
+        PROTOCOL_BINARY_CMD_SASL_STEP = 0x22,
+
+        /* These commands are used for range operations and exist within
+         * this header for use in other projects.  Range operations are
+         * not expected to be implemented in the memcached server itself.
+         */
+        PROTOCOL_BINARY_CMD_RGET      = 0x30,
+        PROTOCOL_BINARY_CMD_RSET      = 0x31,
+        PROTOCOL_BINARY_CMD_RSETQ     = 0x32,
+        PROTOCOL_BINARY_CMD_RAPPEND   = 0x33,
+        PROTOCOL_BINARY_CMD_RAPPENDQ  = 0x34,
+        PROTOCOL_BINARY_CMD_RPREPEND  = 0x35,
+        PROTOCOL_BINARY_CMD_RPREPENDQ = 0x36,
+        PROTOCOL_BINARY_CMD_RDELETE   = 0x37,
+        PROTOCOL_BINARY_CMD_RDELETEQ  = 0x38,
+        PROTOCOL_BINARY_CMD_RINCR     = 0x39,
+        PROTOCOL_BINARY_CMD_RINCRQ    = 0x3a,
+        PROTOCOL_BINARY_CMD_RDECR     = 0x3b,
+        PROTOCOL_BINARY_CMD_RDECRQ    = 0x3c
+        /* End Range operations */
+
+    } protocol_binary_command;
+
+    /**
+     * Definition of the data types in the packet
+     * See section 3.4 Data Types
+     */
+    typedef enum {
+        PROTOCOL_BINARY_RAW_BYTES = 0x00
+    } protocol_binary_datatypes;
+
+    /**
+     * Definition of the header structure for a request packet.
+     * See section 2
+     */
+    typedef union {
+        struct {
+            uint8_t magic;
+            uint8_t opcode;
+            uint16_t keylen;
+            uint8_t extlen;
+            uint8_t datatype;
+            uint16_t reserved;
+            uint32_t bodylen;
+            uint32_t opaque;
+            uint64_t cas;
+        } request;
+        uint8_t bytes[24];
+    } protocol_binary_request_header;
+
+    /**
+     * Definition of the header structure for a response packet.
+     * See section 2
+     */
+    typedef union {
+        struct {
+            uint8_t magic;
+            uint8_t opcode;
+            uint16_t keylen;
+            uint8_t extlen;
+            uint8_t datatype;
+            uint16_t status;
+            uint32_t bodylen;
+            uint32_t opaque;
+            uint64_t cas;
+        } response;
+        uint8_t bytes[24];
+    } protocol_binary_response_header;
+
+    /**
+     * Definition of a request-packet containing no extras
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header)];
+    } protocol_binary_request_no_extras;
+
+    /**
+     * Definition of a response-packet containing no extras
+     */
+    typedef union {
+        struct {
+            protocol_binary_response_header header;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_response_header)];
+    } protocol_binary_response_no_extras;
+
+    /**
+     * Definition of the packet used by the get, getq, getk and getkq command.
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_get;
+    typedef protocol_binary_request_no_extras protocol_binary_request_getq;
+    typedef protocol_binary_request_no_extras protocol_binary_request_getk;
+    typedef protocol_binary_request_no_extras protocol_binary_request_getkq;
+
+    /**
+     * Definition of the packet returned from a successful get, getq, getk and
+     * getkq.
+     * See section 4
+     */
+    typedef union {
+        struct {
+            protocol_binary_response_header header;
+            struct {
+                uint32_t flags;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_response_header) + 4];
+    } protocol_binary_response_get;
+
+    typedef protocol_binary_response_get protocol_binary_response_getq;
+    typedef protocol_binary_response_get protocol_binary_response_getk;
+    typedef protocol_binary_response_get protocol_binary_response_getkq;
+
+    /**
+     * Definition of the packet used by the delete command
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_delete;
+
+    /**
+     * Definition of the packet returned by the delete command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_delete;
+
+    /**
+     * Definition of the packet used by the flush command
+     * See section 4
+     * Please note that the expiration field is optional, so remember to see
+     * check the header.bodysize to see if it is present.
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+            struct {
+                uint32_t expiration;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 4];
+    } protocol_binary_request_flush;
+
+    /**
+     * Definition of the packet returned by the flush command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_flush;
+
+    /**
+     * Definition of the packet used by set, add and replace
+     * See section 4
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+            struct {
+                uint32_t flags;
+                uint32_t expiration;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 8];
+    } protocol_binary_request_set;
+    typedef protocol_binary_request_set protocol_binary_request_add;
+    typedef protocol_binary_request_set protocol_binary_request_replace;
+
+    /**
+     * Definition of the packet returned by set, add and replace
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_set;
+    typedef protocol_binary_response_no_extras protocol_binary_response_add;
+    typedef protocol_binary_response_no_extras protocol_binary_response_replace;
+
+    /**
+     * Definition of the noop packet
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_noop;
+
+    /**
+     * Definition of the packet returned by the noop command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_noop;
+
+    /**
+     * Definition of the structure used by the increment and decrement
+     * command.
+     * See section 4
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+            struct {
+                uint64_t delta;
+                uint64_t initial;
+                uint32_t expiration;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 20];
+    } protocol_binary_request_incr;
+    typedef protocol_binary_request_incr protocol_binary_request_decr;
+
+    /**
+     * Definition of the response from an incr or decr command
+     * command.
+     * See section 4
+     */
+    typedef union {
+        struct {
+            protocol_binary_response_header header;
+            struct {
+                uint64_t value;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_response_header) + 8];
+    } protocol_binary_response_incr;
+    typedef protocol_binary_response_incr protocol_binary_response_decr;
+
+    /**
+     * Definition of the quit
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_quit;
+
+    /**
+     * Definition of the packet returned by the quit command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_quit;
+
+    /**
+     * Definition of the packet used by append and prepend command
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_append;
+    typedef protocol_binary_request_no_extras protocol_binary_request_prepend;
+
+    /**
+     * Definition of the packet returned from a successful append or prepend
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_append;
+    typedef protocol_binary_response_no_extras protocol_binary_response_prepend;
+
+    /**
+     * Definition of the packet used by the version command
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_version;
+
+    /**
+     * Definition of the packet returned from a successful version command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_version;
+
+
+    /**
+     * Definition of the packet used by the stats command.
+     * See section 4
+     */
+    typedef protocol_binary_request_no_extras protocol_binary_request_stats;
+
+    /**
+     * Definition of the packet returned from a successful stats command
+     * See section 4
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_stats;
+
+    /**
+     * Definition of the packet used by the touch command.
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+            struct {
+                uint32_t expiration;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 4];
+    } protocol_binary_request_touch;
+
+    /**
+     * Definition of the packet returned from the touch command
+     */
+    typedef protocol_binary_response_no_extras protocol_binary_response_touch;
+
+    /**
+     * Definition of the packet used by the GAT(Q) command.
+     */
+    typedef union {
+        struct {
+            protocol_binary_request_header header;
+            struct {
+                uint32_t expiration;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 4];
+    } protocol_binary_request_gat;
+
+    typedef protocol_binary_request_gat protocol_binary_request_gatq;
+    typedef protocol_binary_request_gat protocol_binary_request_gatk;
+    typedef protocol_binary_request_gat protocol_binary_request_gatkq;
+
+    /**
+     * Definition of the packet returned from the GAT(Q)
+     */
+    typedef protocol_binary_response_get protocol_binary_response_gat;
+    typedef protocol_binary_response_get protocol_binary_response_gatq;
+    typedef protocol_binary_response_get protocol_binary_response_gatk;
+    typedef protocol_binary_response_get protocol_binary_response_gatkq;
+
+    /**
+     * Definition of a request for a range operation.
+     * See http://code.google.com/p/memcached/wiki/RangeOps
+     *
+     * These types are used for range operations and exist within
+     * this header for use in other projects.  Range operations are
+     * not expected to be implemented in the memcached server itself.
+     */
+    typedef union {
+        struct {
+            protocol_binary_response_header header;
+            struct {
+                uint16_t size;
+                uint8_t  reserved;
+                uint8_t  flags;
+                uint32_t max_results;
+            } body;
+        } message;
+        uint8_t bytes[sizeof(protocol_binary_request_header) + 4];
+    } protocol_binary_request_rangeop;
+
+    typedef protocol_binary_request_rangeop protocol_binary_request_rget;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rset;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rsetq;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rappend;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rappendq;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rprepend;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rprependq;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rdelete;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rdeleteq;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rincr;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rincrq;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rdecr;
+    typedef protocol_binary_request_rangeop protocol_binary_request_rdecrq;
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* PROTOCOL_BINARY_H */