/** \file */
/*
* ***** BEGIN LICENSE BLOCK *****
* Version: MIT
*
* Portions created by Alan Antonuk are Copyright (c) 2012-2014
* Alan Antonuk. All Rights Reserved.
*
* Portions created by VMware are Copyright (c) 2007-2012 VMware, Inc.
* All Rights Reserved.
*
* Portions created by Tony Garnock-Jones are Copyright (c) 2009-2010
* VMware, Inc. and Tony Garnock-Jones. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* ***** END LICENSE BLOCK *****
*/
#ifndef AMQP_H
#define AMQP_H
/** \cond HIDE_FROM_DOXYGEN */
#ifdef __cplusplus
#define AMQP_BEGIN_DECLS extern "C" {
#define AMQP_END_DECLS }
#else
#define AMQP_BEGIN_DECLS
#define AMQP_END_DECLS
#endif
/*
* \internal
* Important API decorators:
* AMQP_PUBLIC_FUNCTION - a public API function
* AMQP_PUBLIC_VARIABLE - a public API external variable
* AMQP_CALL - calling convension (used on Win32)
*/
#if defined(_WIN32) && defined(_MSC_VER)
#if defined(AMQP_BUILD) && !defined(AMQP_STATIC)
#define AMQP_PUBLIC_FUNCTION __declspec(dllexport)
#define AMQP_PUBLIC_VARIABLE __declspec(dllexport) extern
#else
#define AMQP_PUBLIC_FUNCTION
#if !defined(AMQP_STATIC)
#define AMQP_PUBLIC_VARIABLE __declspec(dllimport) extern
#else
#define AMQP_PUBLIC_VARIABLE extern
#endif
#endif
#define AMQP_CALL __cdecl
#elif defined(_WIN32) && defined(__BORLANDC__)
#if defined(AMQP_BUILD) && !defined(AMQP_STATIC)
#define AMQP_PUBLIC_FUNCTION __declspec(dllexport)
#define AMQP_PUBLIC_VARIABLE __declspec(dllexport) extern
#else
#define AMQP_PUBLIC_FUNCTION
#if !defined(AMQP_STATIC)
#define AMQP_PUBLIC_VARIABLE __declspec(dllimport) extern
#else
#define AMQP_PUBLIC_VARIABLE extern
#endif
#endif
#define AMQP_CALL __cdecl
#elif defined(_WIN32) && defined(__MINGW32__)
#if defined(AMQP_BUILD) && !defined(AMQP_STATIC)
#define AMQP_PUBLIC_FUNCTION __declspec(dllexport)
#define AMQP_PUBLIC_VARIABLE __declspec(dllexport) extern
#else
#define AMQP_PUBLIC_FUNCTION
#if !defined(AMQP_STATIC)
#define AMQP_PUBLIC_VARIABLE __declspec(dllimport) extern
#else
#define AMQP_PUBLIC_VARIABLE extern
#endif
#endif
#define AMQP_CALL __cdecl
#elif defined(_WIN32) && defined(__CYGWIN__)
#if defined(AMQP_BUILD) && !defined(AMQP_STATIC)
#define AMQP_PUBLIC_FUNCTION __declspec(dllexport)
#define AMQP_PUBLIC_VARIABLE __declspec(dllexport)
#else
#define AMQP_PUBLIC_FUNCTION
#if !defined(AMQP_STATIC)
#define AMQP_PUBLIC_VARIABLE __declspec(dllimport) extern
#else
#define AMQP_PUBLIC_VARIABLE extern
#endif
#endif
#define AMQP_CALL __cdecl
#elif defined(__GNUC__) && __GNUC__ >= 4
#define AMQP_PUBLIC_FUNCTION __attribute__((visibility("default")))
#define AMQP_PUBLIC_VARIABLE __attribute__((visibility("default"))) extern
#define AMQP_CALL
#else
#define AMQP_PUBLIC_FUNCTION
#define AMQP_PUBLIC_VARIABLE extern
#define AMQP_CALL
#endif
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1)
#define AMQP_DEPRECATED(function) function __attribute__((__deprecated__))
#elif defined(_MSC_VER)
#define AMQP_DEPRECATED(function) __declspec(deprecated) function
#else
#define AMQP_DEPRECATED(function)
#endif
/* Define ssize_t on Win32/64 platforms
See: http://lists.cs.uiuc.edu/pipermail/llvmdev/2010-April/030649.html for
details
*/
#if !defined(_W64)
#if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
#define _W64 __w64
#else
#define _W64
#endif
#endif
#ifdef _MSC_VER
#ifdef _WIN64
typedef __int64 ssize_t;
#else
typedef _W64 int ssize_t;
#endif
#endif
#if defined(_WIN32) && defined(__MINGW32__)
#include <sys/types.h>
#endif
/** \endcond */
#include <stddef.h>
#include <stdint.h>
struct timeval;
AMQP_BEGIN_DECLS
/**
* \def AMQP_VERSION_MAJOR
*
* Major library version number compile-time constant
*
* The major version is incremented when backwards incompatible API changes
* are made.
*
* \sa AMQP_VERSION, AMQP_VERSION_STRING
*
* \since v0.4.0
*/
/**
* \def AMQP_VERSION_MINOR
*
* Minor library version number compile-time constant
*
* The minor version is incremented when new APIs are added. Existing APIs
* are left alone.
*
* \sa AMQP_VERSION, AMQP_VERSION_STRING
*
* \since v0.4.0
*/
/**
* \def AMQP_VERSION_PATCH
*
* Patch library version number compile-time constant
*
* The patch version is incremented when library code changes, but the API
* is not changed.
*
* \sa AMQP_VERSION, AMQP_VERSION_STRING
*
* \since v0.4.0
*/
/**
* \def AMQP_VERSION_IS_RELEASE
*
* Version constant set to 1 for tagged release, 0 otherwise
*
* NOTE: versions that are not tagged releases are not guaranteed to be API/ABI
* compatible with older releases, and may change commit-to-commit.
*
* \sa AMQP_VERSION, AMQP_VERSION_STRING
*
* \since v0.4.0
*/
/*
* Developer note: when changing these, be sure to update SOVERSION constants
* in CMakeLists.txt and configure.ac
*/
#define AMQP_VERSION_MAJOR 0
#define AMQP_VERSION_MINOR 9
#define AMQP_VERSION_PATCH 0
#define AMQP_VERSION_IS_RELEASE 1
/**
* \def AMQP_VERSION_CODE
*
* Helper macro to geneate a packed version code suitable for
* comparison with AMQP_VERSION.
*
* \sa amqp_version_number() AMQP_VERSION_MAJOR, AMQP_VERSION_MINOR,
* AMQP_VERSION_PATCH, AMQP_VERSION_IS_RELEASE, AMQP_VERSION
*
* \since v0.6.1
*/
#define AMQP_VERSION_CODE(major, minor, patch, release) \
((major << 24) | (minor << 16) | (patch << 8) | (release))
/**
* \def AMQP_VERSION
*
* Packed version number
*
* AMQP_VERSION is a 4-byte unsigned integer with the most significant byte
* set to AMQP_VERSION_MAJOR, the second most significant byte set to
* AMQP_VERSION_MINOR, third most significant byte set to AMQP_VERSION_PATCH,
* and the lowest byte set to AMQP_VERSION_IS_RELEASE.
*
* For example version 2.3.4 which is released version would be encoded as
* 0x02030401
*
* \sa amqp_version_number() AMQP_VERSION_MAJOR, AMQP_VERSION_MINOR,
* AMQP_VERSION_PATCH, AMQP_VERSION_IS_RELEASE, AMQP_VERSION_CODE
*
* \since v0.4.0
*/
#define AMQP_VERSION \
AMQP_VERSION_CODE(AMQP_VERSION_MAJOR, AMQP_VERSION_MINOR, \
AMQP_VERSION_PATCH, AMQP_VERSION_IS_RELEASE)
/** \cond HIDE_FROM_DOXYGEN */
#define AMQ_STRINGIFY(s) AMQ_STRINGIFY_HELPER(s)
#define AMQ_STRINGIFY_HELPER(s) #s
#define AMQ_VERSION_STRING \
AMQ_STRINGIFY(AMQP_VERSION_MAJOR) \
"." AMQ_STRINGIFY(AMQP_VERSION_MINOR) "." AMQ_STRINGIFY(AMQP_VERSION_PATCH)
/** \endcond */
/**
* \def AMQP_VERSION_STRING
*
* Version string compile-time constant
*
* Non-released versions of the library will have "-pre" appended to the
* version string
*
* \sa amqp_version()
*
* \since v0.4.0
*/
#if AMQP_VERSION_IS_RELEASE
#define AMQP_VERSION_STRING AMQ_VERSION_STRING
#else
#define AMQP_VERSION_STRING AMQ_VERSION_STRING "-pre"
#endif
/**
* Returns the rabbitmq-c version as a packed integer.
*
* See \ref AMQP_VERSION
*
* \return packed 32-bit integer representing version of library at runtime
*
* \sa AMQP_VERSION, amqp_version()
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
uint32_t AMQP_CALL amqp_version_number(void);
/**
* Returns the rabbitmq-c version as a string.
*
* See \ref AMQP_VERSION_STRING
*
* \return a statically allocated string describing the version of rabbitmq-c.
*
* \sa amqp_version_number(), AMQP_VERSION_STRING, AMQP_VERSION
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
char const *AMQP_CALL amqp_version(void);
/**
* \def AMQP_DEFAULT_FRAME_SIZE
*
* Default frame size (128Kb)
*
* \sa amqp_login(), amqp_login_with_properties()
*
* \since v0.4.0
*/
#define AMQP_DEFAULT_FRAME_SIZE 131072
/**
* \def AMQP_DEFAULT_MAX_CHANNELS
*
* Default maximum number of channels (0, no limit)
*
* \sa amqp_login(), amqp_login_with_properties()
*
* \since v0.4.0
*/
#define AMQP_DEFAULT_MAX_CHANNELS 0
/**
* \def AMQP_DEFAULT_HEARTBEAT
*
* Default heartbeat interval (0, heartbeat disabled)
*
* \sa amqp_login(), amqp_login_with_properties()
*
* \since v0.4.0
*/
#define AMQP_DEFAULT_HEARTBEAT 0
/**
* \def AMQP_DEFAULT_VHOST
*
* Default RabbitMQ vhost: "/"
*
* \sa amqp_login(), amqp_login_with_properties()
*
* \since v0.9.0
*/
#define AMQP_DEFAULT_VHOST "/"
/**
* boolean type 0 = false, true otherwise
*
* \since v0.1
*/
typedef int amqp_boolean_t;
/**
* Method number
*
* \since v0.1
*/
typedef uint32_t amqp_method_number_t;
/**
* Bitmask for flags
*
* \since v0.1
*/
typedef uint32_t amqp_flags_t;
/**
* Channel type
*
* \since v0.1
*/
typedef uint16_t amqp_channel_t;
/**
* Buffer descriptor
*
* \since v0.1
*/
typedef struct amqp_bytes_t_ {
size_t len; /**< length of the buffer in bytes */
void *bytes; /**< pointer to the beginning of the buffer */
} amqp_bytes_t;
/**
* Decimal data type
*
* \since v0.1
*/
typedef struct amqp_decimal_t_ {
uint8_t decimals; /**< the location of the decimal point */
uint32_t value; /**< the value before the decimal point is applied */
} amqp_decimal_t;
/**
* AMQP field table
*
* An AMQP field table is a set of key-value pairs.
* A key is a UTF-8 encoded string up to 128 bytes long, and are not null
* terminated.
* A value can be one of several different datatypes. \sa
* amqp_field_value_kind_t
*
* \sa amqp_table_entry_t
*
* \since v0.1
*/
typedef struct amqp_table_t_ {
int num_entries; /**< length of entries array */
struct amqp_table_entry_t_ *entries; /**< an array of table entries */
} amqp_table_t;
/**
* An AMQP Field Array
*
* A repeated set of field values, all must be of the same type
*
* \since v0.1
*/
typedef struct amqp_array_t_ {
int num_entries; /**< Number of entries in the table */
struct amqp_field_value_t_ *entries; /**< linked list of field values */
} amqp_array_t;
/*
0-9 0-9-1 Qpid/Rabbit Type Remarks
---------------------------------------------------------------------------
t t Boolean
b b Signed 8-bit
B Unsigned 8-bit
U s Signed 16-bit (A1)
u Unsigned 16-bit
I I I Signed 32-bit
i Unsigned 32-bit
L l Signed 64-bit (B)
l Unsigned 64-bit
f f 32-bit float
d d 64-bit float
D D D Decimal
s Short string (A2)
S S S Long string
A Nested Array
T T T Timestamp (u64)
F F F Nested Table
V V V Void
x Byte array
Remarks:
A1, A2: Notice how the types **CONFLICT** here. In Qpid and Rabbit,
's' means a signed 16-bit integer; in 0-9-1, it means a
short string.
B: Notice how the signednesses **CONFLICT** here. In Qpid and Rabbit,
'l' means a signed 64-bit integer; in 0-9-1, it means an unsigned
64-bit integer.
I'm going with the Qpid/Rabbit types, where there's a conflict, and
the 0-9-1 types otherwise. 0-8 is a subset of 0-9, which is a subset
of the other two, so this will work for both 0-8 and 0-9-1 branches of
the code.
*/
/**
* A field table value
*
* \since v0.1
*/
typedef struct amqp_field_value_t_ {
uint8_t kind; /**< the type of the entry /sa amqp_field_value_kind_t */
union {
amqp_boolean_t boolean; /**< boolean type AMQP_FIELD_KIND_BOOLEAN */
int8_t i8; /**< int8_t type AMQP_FIELD_KIND_I8 */
uint8_t u8; /**< uint8_t type AMQP_FIELD_KIND_U8 */
int16_t i16; /**< int16_t type AMQP_FIELD_KIND_I16 */
uint16_t u16; /**< uint16_t type AMQP_FIELD_KIND_U16 */
int32_t i32; /**< int32_t type AMQP_FIELD_KIND_I32 */
uint32_t u32; /**< uint32_t type AMQP_FIELD_KIND_U32 */
int64_t i64; /**< int64_t type AMQP_FIELD_KIND_I64 */
uint64_t u64; /**< uint64_t type AMQP_FIELD_KIND_U64,
AMQP_FIELD_KIND_TIMESTAMP */
float f32; /**< float type AMQP_FIELD_KIND_F32 */
double f64; /**< double type AMQP_FIELD_KIND_F64 */
amqp_decimal_t decimal; /**< amqp_decimal_t AMQP_FIELD_KIND_DECIMAL */
amqp_bytes_t bytes; /**< amqp_bytes_t type AMQP_FIELD_KIND_UTF8,
AMQP_FIELD_KIND_BYTES */
amqp_table_t table; /**< amqp_table_t type AMQP_FIELD_KIND_TABLE */
amqp_array_t array; /**< amqp_array_t type AMQP_FIELD_KIND_ARRAY */
} value; /**< a union of the value */
} amqp_field_value_t;
/**
* An entry in a field-table
*
* \sa amqp_table_encode(), amqp_table_decode(), amqp_table_clone()
*
* \since v0.1
*/
typedef struct amqp_table_entry_t_ {
amqp_bytes_t key; /**< the table entry key. Its a null-terminated UTF-8
* string, with a maximum size of 128 bytes */
amqp_field_value_t value; /**< the table entry values */
} amqp_table_entry_t;
/**
* Field value types
*
* \since v0.1
*/
typedef enum {
AMQP_FIELD_KIND_BOOLEAN =
't', /**< boolean type. 0 = false, 1 = true @see amqp_boolean_t */
AMQP_FIELD_KIND_I8 = 'b', /**< 8-bit signed integer, datatype: int8_t */
AMQP_FIELD_KIND_U8 = 'B', /**< 8-bit unsigned integer, datatype: uint8_t */
AMQP_FIELD_KIND_I16 = 's', /**< 16-bit signed integer, datatype: int16_t */
AMQP_FIELD_KIND_U16 = 'u', /**< 16-bit unsigned integer, datatype: uint16_t */
AMQP_FIELD_KIND_I32 = 'I', /**< 32-bit signed integer, datatype: int32_t */
AMQP_FIELD_KIND_U32 = 'i', /**< 32-bit unsigned integer, datatype: uint32_t */
AMQP_FIELD_KIND_I64 = 'l', /**< 64-bit signed integer, datatype: int64_t */
AMQP_FIELD_KIND_U64 = 'L', /**< 64-bit unsigned integer, datatype: uint64_t */
AMQP_FIELD_KIND_F32 =
'f', /**< single-precision floating point value, datatype: float */
AMQP_FIELD_KIND_F64 =
'd', /**< double-precision floating point value, datatype: double */
AMQP_FIELD_KIND_DECIMAL =
'D', /**< amqp-decimal value, datatype: amqp_decimal_t */
AMQP_FIELD_KIND_UTF8 = 'S', /**< UTF-8 null-terminated character string,
datatype: amqp_bytes_t */
AMQP_FIELD_KIND_ARRAY = 'A', /**< field array (repeated values of another
datatype. datatype: amqp_array_t */
AMQP_FIELD_KIND_TIMESTAMP = 'T', /**< 64-bit timestamp. datatype uint64_t */
AMQP_FIELD_KIND_TABLE = 'F', /**< field table. encapsulates a table inside a
table entry. datatype: amqp_table_t */
AMQP_FIELD_KIND_VOID = 'V', /**< empty entry */
AMQP_FIELD_KIND_BYTES =
'x' /**< unformatted byte string, datatype: amqp_bytes_t */
} amqp_field_value_kind_t;
/**
* A list of allocation blocks
*
* \since v0.1
*/
typedef struct amqp_pool_blocklist_t_ {
int num_blocks; /**< Number of blocks in the block list */
void **blocklist; /**< Array of memory blocks */
} amqp_pool_blocklist_t;
/**
* A memory pool
*
* \since v0.1
*/
typedef struct amqp_pool_t_ {
size_t pagesize; /**< the size of the page in bytes. Allocations less than or
* equal to this size are allocated in the pages block list.
* Allocations greater than this are allocated in their own
* own block in the large_blocks block list */
amqp_pool_blocklist_t pages; /**< blocks that are the size of pagesize */
amqp_pool_blocklist_t
large_blocks; /**< allocations larger than the pagesize */
int next_page; /**< an index to the next unused page block */
char *alloc_block; /**< pointer to the current allocation block */
size_t alloc_used; /**< number of bytes in the current allocation block that
has been used */
} amqp_pool_t;
/**
* An amqp method
*
* \since v0.1
*/
typedef struct amqp_method_t_ {
amqp_method_number_t id; /**< the method id number */
void *decoded; /**< pointer to the decoded method,
* cast to the appropriate type to use */
} amqp_method_t;
/**
* An AMQP frame
*
* \since v0.1
*/
typedef struct amqp_frame_t_ {
uint8_t frame_type; /**< frame type. The types:
* - AMQP_FRAME_METHOD - use the method union member
* - AMQP_FRAME_HEADER - use the properties union member
* - AMQP_FRAME_BODY - use the body_fragment union member
*/
amqp_channel_t channel; /**< the channel the frame was received on */
union {
amqp_method_t
method; /**< a method, use if frame_type == AMQP_FRAME_METHOD */
struct {
uint16_t class_id; /**< the class for the properties */
uint64_t body_size; /**< size of the body in bytes */
void *decoded; /**< the decoded properties */
amqp_bytes_t raw; /**< amqp-encoded properties structure */
} properties; /**< message header, a.k.a., properties,
use if frame_type == AMQP_FRAME_HEADER */
amqp_bytes_t body_fragment; /**< a body fragment, use if frame_type ==
AMQP_FRAME_BODY */
struct {
uint8_t transport_high; /**< @internal first byte of handshake */
uint8_t transport_low; /**< @internal second byte of handshake */
uint8_t protocol_version_major; /**< @internal third byte of handshake */
uint8_t protocol_version_minor; /**< @internal fourth byte of handshake */
} protocol_header; /**< Used only when doing the initial handshake with the
broker, don't use otherwise */
} payload; /**< the payload of the frame */
} amqp_frame_t;
/**
* Response type
*
* \since v0.1
*/
typedef enum amqp_response_type_enum_ {
AMQP_RESPONSE_NONE = 0, /**< the library got an EOF from the socket */
AMQP_RESPONSE_NORMAL, /**< response normal, the RPC completed successfully */
AMQP_RESPONSE_LIBRARY_EXCEPTION, /**< library error, an error occurred in the
library, examine the library_error */
AMQP_RESPONSE_SERVER_EXCEPTION /**< server exception, the broker returned an
error, check replay */
} amqp_response_type_enum;
/**
* Reply from a RPC method on the broker
*
* \since v0.1
*/
typedef struct amqp_rpc_reply_t_ {
amqp_response_type_enum reply_type; /**< the reply type:
* - AMQP_RESPONSE_NORMAL - the RPC
* completed successfully
* - AMQP_RESPONSE_SERVER_EXCEPTION - the
* broker returned
* an exception, check the reply field
* - AMQP_RESPONSE_LIBRARY_EXCEPTION - the
* library
* encountered an error, check the
* library_error field
*/
amqp_method_t reply; /**< in case of AMQP_RESPONSE_SERVER_EXCEPTION this
* field will be set to the method returned from the
* broker */
int library_error; /**< in case of AMQP_RESPONSE_LIBRARY_EXCEPTION this
* field will be set to an error code. An error
* string can be retrieved using amqp_error_string */
} amqp_rpc_reply_t;
/**
* SASL method type
*
* \since v0.1
*/
typedef enum amqp_sasl_method_enum_ {
AMQP_SASL_METHOD_UNDEFINED = -1, /**< Invalid SASL method */
AMQP_SASL_METHOD_PLAIN =
0, /**< the PLAIN SASL method for authentication to the broker */
AMQP_SASL_METHOD_EXTERNAL =
1 /**< the EXTERNAL SASL method for authentication to the broker */
} amqp_sasl_method_enum;
/**
* connection state object
*
* \since v0.1
*/
typedef struct amqp_connection_state_t_ *amqp_connection_state_t;
/**
* Socket object
*
* \since v0.4.0
*/
typedef struct amqp_socket_t_ amqp_socket_t;
/**
* Status codes
*
* \since v0.4.0
*/
/* NOTE: When updating this enum, update the strings in librabbitmq/amqp_api.c
*/
typedef enum amqp_status_enum_ {
AMQP_STATUS_OK = 0x0, /**< Operation successful */
AMQP_STATUS_NO_MEMORY = -0x0001, /**< Memory allocation
failed */
AMQP_STATUS_BAD_AMQP_DATA = -0x0002, /**< Incorrect or corrupt
data was received from
the broker. This is a
protocol error. */
AMQP_STATUS_UNKNOWN_CLASS = -0x0003, /**< An unknown AMQP class
was received. This is
a protocol error. */
AMQP_STATUS_UNKNOWN_METHOD = -0x0004, /**< An unknown AMQP method
was received. This is
a protocol error. */
AMQP_STATUS_HOSTNAME_RESOLUTION_FAILED = -0x0005, /**< Unable to resolve the
* hostname */
AMQP_STATUS_INCOMPATIBLE_AMQP_VERSION = -0x0006, /**< The broker advertised
an incompaible AMQP
version */
AMQP_STATUS_CONNECTION_CLOSED = -0x0007, /**< The connection to the
broker has been closed
*/
AMQP_STATUS_BAD_URL = -0x0008, /**< malformed AMQP URL */
AMQP_STATUS_SOCKET_ERROR = -0x0009, /**< A socket error
occurred */
AMQP_STATUS_INVALID_PARAMETER = -0x000A, /**< An invalid parameter
was passed into the
function */
AMQP_STATUS_TABLE_TOO_BIG = -0x000B, /**< The amqp_table_t object
cannot be serialized
because the output
buffer is too small */
AMQP_STATUS_WRONG_METHOD = -0x000C, /**< The wrong method was
received */
AMQP_STATUS_TIMEOUT = -0x000D, /**< Operation timed out */
AMQP_STATUS_TIMER_FAILURE = -0x000E, /**< The underlying system
timer facility failed */
AMQP_STATUS_HEARTBEAT_TIMEOUT = -0x000F, /**< Timed out waiting for
heartbeat */
AMQP_STATUS_UNEXPECTED_STATE = -0x0010, /**< Unexpected protocol
state */
AMQP_STATUS_SOCKET_CLOSED = -0x0011, /**< Underlying socket is
closed */
AMQP_STATUS_SOCKET_INUSE = -0x0012, /**< Underlying socket is
already open */
AMQP_STATUS_BROKER_UNSUPPORTED_SASL_METHOD = -0x0013, /**< Broker does not
support the requested
SASL mechanism */
AMQP_STATUS_UNSUPPORTED = -0x0014, /**< Parameter is unsupported
in this version */
_AMQP_STATUS_NEXT_VALUE = -0x0015, /**< Internal value */
AMQP_STATUS_TCP_ERROR = -0x0100, /**< A generic TCP error
occurred */
AMQP_STATUS_TCP_SOCKETLIB_INIT_ERROR = -0x0101, /**< An error occurred trying
to initialize the
socket library*/
_AMQP_STATUS_TCP_NEXT_VALUE = -0x0102, /**< Internal value */
AMQP_STATUS_SSL_ERROR = -0x0200, /**< A generic SSL error
occurred. */
AMQP_STATUS_SSL_HOSTNAME_VERIFY_FAILED = -0x0201, /**< SSL validation of
hostname against
peer certificate
failed */
AMQP_STATUS_SSL_PEER_VERIFY_FAILED = -0x0202, /**< SSL validation of peer
certificate failed. */
AMQP_STATUS_SSL_CONNECTION_FAILED = -0x0203, /**< SSL handshake failed. */
_AMQP_STATUS_SSL_NEXT_VALUE = -0x0204 /**< Internal value */
} amqp_status_enum;
/**
* AMQP delivery modes.
* Use these values for the #amqp_basic_properties_t::delivery_mode field.
*
* \since v0.5
*/
typedef enum {
AMQP_DELIVERY_NONPERSISTENT = 1, /**< Non-persistent message */
AMQP_DELIVERY_PERSISTENT = 2 /**< Persistent message */
} amqp_delivery_mode_enum;
AMQP_END_DECLS
#include <amqp_framing.h>
AMQP_BEGIN_DECLS
/**
* Empty bytes structure
*
* \since v0.2
*/
AMQP_PUBLIC_VARIABLE const amqp_bytes_t amqp_empty_bytes;
/**
* Empty table structure
*
* \since v0.2
*/
AMQP_PUBLIC_VARIABLE const amqp_table_t amqp_empty_table;
/**
* Empty table array structure
*
* \since v0.2
*/
AMQP_PUBLIC_VARIABLE const amqp_array_t amqp_empty_array;
/* Compatibility macros for the above, to avoid the need to update
code written against earlier versions of librabbitmq. */
/**
* \def AMQP_EMPTY_BYTES
*
* Deprecated, use \ref amqp_empty_bytes instead
*
* \deprecated use \ref amqp_empty_bytes instead
*
* \since v0.1
*/
#define AMQP_EMPTY_BYTES amqp_empty_bytes
/**
* \def AMQP_EMPTY_TABLE
*
* Deprecated, use \ref amqp_empty_table instead
*
* \deprecated use \ref amqp_empty_table instead
*
* \since v0.1
*/
#define AMQP_EMPTY_TABLE amqp_empty_table
/**
* \def AMQP_EMPTY_ARRAY
*
* Deprecated, use \ref amqp_empty_array instead
*
* \deprecated use \ref amqp_empty_array instead
*
* \since v0.1
*/
#define AMQP_EMPTY_ARRAY amqp_empty_array
/**
* Initializes an amqp_pool_t memory allocation pool for use
*
* Readies an allocation pool for use. An amqp_pool_t
* must be initialized before use
*
* \param [in] pool the amqp_pool_t structure to initialize.
* Calling this function on a pool a pool that has
* already been initialized will result in undefined
* behavior
* \param [in] pagesize the unit size that the pool will allocate
* memory chunks in. Anything allocated against the pool
* with a requested size will be carved out of a block
* this size. Allocations larger than this will be
* allocated individually
*
* \sa recycle_amqp_pool(), empty_amqp_pool(), amqp_pool_alloc(),
* amqp_pool_alloc_bytes(), amqp_pool_t
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL init_amqp_pool(amqp_pool_t *pool, size_t pagesize);
/**
* Recycles an amqp_pool_t memory allocation pool
*
* Recycles the space allocate by the pool
*
* This invalidates all allocations made against the pool before this call is
* made, any use of any allocations made before recycle_amqp_pool() is called
* will result in undefined behavior.
*
* Note: this may or may not release memory, to force memory to be released
* call empty_amqp_pool().
*
* \param [in] pool the amqp_pool_t to recycle
*
* \sa recycle_amqp_pool(), empty_amqp_pool(), amqp_pool_alloc(),
* amqp_pool_alloc_bytes()
*
* \since v0.1
*
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL recycle_amqp_pool(amqp_pool_t *pool);
/**
* Empties an amqp memory pool
*
* Releases all memory associated with an allocation pool
*
* \param [in] pool the amqp_pool_t to empty
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL empty_amqp_pool(amqp_pool_t *pool);
/**
* Allocates a block of memory from an amqp_pool_t memory pool
*
* Memory will be aligned on a 8-byte boundary. If a 0-length allocation is
* requested, a NULL pointer will be returned.
*
* \param [in] pool the allocation pool to allocate the memory from
* \param [in] amount the size of the allocation in bytes.
* \return a pointer to the memory block, or NULL if the allocation cannot
* be satisfied.
*
* \sa init_amqp_pool(), recycle_amqp_pool(), empty_amqp_pool(),
* amqp_pool_alloc_bytes()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void *AMQP_CALL amqp_pool_alloc(amqp_pool_t *pool, size_t amount);
/**
* Allocates a block of memory from an amqp_pool_t to an amqp_bytes_t
*
* Memory will be aligned on a 8-byte boundary. If a 0-length allocation is
* requested, output.bytes = NULL.
*
* \param [in] pool the allocation pool to allocate the memory from
* \param [in] amount the size of the allocation in bytes
* \param [in] output the location to store the pointer. On success
* output.bytes will be set to the beginning of the buffer
* output.len will be set to amount
* On error output.bytes will be set to NULL and output.len
* set to 0
*
* \sa init_amqp_pool(), recycle_amqp_pool(), empty_amqp_pool(),
* amqp_pool_alloc()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_pool_alloc_bytes(amqp_pool_t *pool, size_t amount,
amqp_bytes_t *output);
/**
* Wraps a c string in an amqp_bytes_t
*
* Takes a string, calculates its length and creates an
* amqp_bytes_t that points to it. The string is not duplicated.
*
* For a given input cstr, The amqp_bytes_t output.bytes is the
* same as cstr, output.len is the length of the string not including
* the \0 terminator
*
* This function uses strlen() internally so cstr must be properly
* terminated
*
* \param [in] cstr the c string to wrap
* \return an amqp_bytes_t that describes the string
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_bytes_t AMQP_CALL amqp_cstring_bytes(char const *cstr);
/**
* Duplicates an amqp_bytes_t buffer.
*
* The buffer is cloned and the contents copied.
*
* The memory associated with the output is allocated
* with amqp_bytes_malloc() and should be freed with
* amqp_bytes_free()
*
* \param [in] src
* \return a clone of the src
*
* \sa amqp_bytes_free(), amqp_bytes_malloc()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_bytes_t AMQP_CALL amqp_bytes_malloc_dup(amqp_bytes_t src);
/**
* Allocates a amqp_bytes_t buffer
*
* Creates an amqp_bytes_t buffer of the specified amount, the buffer should be
* freed using amqp_bytes_free()
*
* \param [in] amount the size of the buffer in bytes
* \returns an amqp_bytes_t with amount bytes allocated.
* output.bytes will be set to NULL on error
*
* \sa amqp_bytes_free(), amqp_bytes_malloc_dup()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_bytes_t AMQP_CALL amqp_bytes_malloc(size_t amount);
/**
* Frees an amqp_bytes_t buffer
*
* Frees a buffer allocated with amqp_bytes_malloc() or amqp_bytes_malloc_dup()
*
* Calling amqp_bytes_free on buffers not allocated with one
* of those two functions will result in undefined behavior
*
* \param [in] bytes the buffer to free
*
* \sa amqp_bytes_malloc(), amqp_bytes_malloc_dup()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_bytes_free(amqp_bytes_t bytes);
/**
* Allocate and initialize a new amqp_connection_state_t object
*
* amqp_connection_state_t objects created with this function
* should be freed with amqp_destroy_connection()
*
* \returns an opaque pointer on success, NULL or 0 on failure.
*
* \sa amqp_destroy_connection()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_connection_state_t AMQP_CALL amqp_new_connection(void);
/**
* Get the underlying socket descriptor for the connection
*
* \warning Use the socket returned from this function carefully, incorrect use
* of the socket outside of the library will lead to undefined behavior.
* Additionally rabbitmq-c may use the socket differently version-to-version,
* what may work in one version, may break in the next version. Be sure to
* throughly test any applications that use the socket returned by this
* function especially when using a newer version of rabbitmq-c
*
* \param [in] state the connection object
* \returns the socket descriptor if one has been set, -1 otherwise
*
* \sa amqp_tcp_socket_new(), amqp_ssl_socket_new(), amqp_socket_open()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_get_sockfd(amqp_connection_state_t state);
/**
* Deprecated, use amqp_tcp_socket_new() or amqp_ssl_socket_new()
*
* \deprecated Use amqp_tcp_socket_new() or amqp_ssl_socket_new()
*
* Sets the socket descriptor associated with the connection. The socket
* should be connected to a broker, and should not be read to or written from
* before calling this function. A socket descriptor can be created and opened
* using amqp_open_socket()
*
* \param [in] state the connection object
* \param [in] sockfd the socket
*
* \sa amqp_open_socket(), amqp_tcp_socket_new(), amqp_ssl_socket_new()
*
* \since v0.1
*/
AMQP_DEPRECATED(AMQP_PUBLIC_FUNCTION void AMQP_CALL
amqp_set_sockfd(amqp_connection_state_t state, int sockfd));
/**
* Tune client side parameters
*
* \warning This function may call abort() if the connection is in a certain
* state. As such it should probably not be called code outside the library.
* connection parameters should be specified when calling amqp_login() or
* amqp_login_with_properties()
*
* This function changes channel_max, frame_max, and heartbeat parameters, on
* the client side only. It does not try to renegotiate these parameters with
* the broker. Using this function will lead to unexpected results.
*
* \param [in] state the connection object
* \param [in] channel_max the maximum number of channels.
* The largest this can be is 65535
* \param [in] frame_max the maximum size of an frame.
* The smallest this can be is 4096
* The largest this can be is 2147483647
* Unless you know what you're doing the recommended
* size is 131072 or 128KB
* \param [in] heartbeat the number of seconds between heartbeats
*
* \return AMQP_STATUS_OK on success, an amqp_status_enum value otherwise.
* Possible error codes include:
* - AMQP_STATUS_NO_MEMORY memory allocation failed.
* - AMQP_STATUS_TIMER_FAILURE the underlying system timer indicated it
* failed.
*
* \sa amqp_login(), amqp_login_with_properties()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_tune_connection(amqp_connection_state_t state,
int channel_max, int frame_max,
int heartbeat);
/**
* Get the maximum number of channels the connection can handle
*
* The maximum number of channels is set when connection negotiation takes
* place in amqp_login() or amqp_login_with_properties().
*
* \param [in] state the connection object
* \return the maximum number of channels. 0 if there is no limit
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_get_channel_max(amqp_connection_state_t state);
/**
* Get the maximum size of an frame the connection can handle
*
* The maximum size of an frame is set when connection negotiation takes
* place in amqp_login() or amqp_login_with_properties().
*
* \param [in] state the connection object
* \return the maximum size of an frame.
*
* \since v0.6
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_get_frame_max(amqp_connection_state_t state);
/**
* Get the number of seconds between heartbeats of the connection
*
* The number of seconds between heartbeats is set when connection
* negotiation takes place in amqp_login() or amqp_login_with_properties().
*
* \param [in] state the connection object
* \return the number of seconds between heartbeats.
*
* \since v0.6
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_get_heartbeat(amqp_connection_state_t state);
/**
* Destroys an amqp_connection_state_t object
*
* Destroys a amqp_connection_state_t object that was created with
* amqp_new_connection(). If the connection with the broker is open, it will be
* implicitly closed with a reply code of 200 (success). Any memory that
* would be freed with amqp_maybe_release_buffers() or
* amqp_maybe_release_buffers_on_channel() will be freed, and use of that
* memory will caused undefined behavior.
*
* \param [in] state the connection object
* \return AMQP_STATUS_OK on success. amqp_status_enum value failure
*
* \sa amqp_new_connection()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_destroy_connection(amqp_connection_state_t state);
/**
* Process incoming data
*
* \warning This is a low-level function intended for those who want to
* have greater control over input and output over the socket from the
* broker. Correctly using this function requires in-depth knowledge of AMQP
* and rabbitmq-c.
*
* For a given buffer of data received from the broker, decode the first
* frame in the buffer. If more than one frame is contained in the input buffer
* the return value will be less than the received_data size, the caller should
* adjust received_data buffer descriptor to point to the beginning of the
* buffer + the return value.
*
* \param [in] state the connection object
* \param [in] received_data a buffer of data received from the broker. The
* function will return the number of bytes of the buffer it used. The
* function copies these bytes to an internal buffer: this part of the buffer
* may be reused after this function successfully completes.
* \param [in,out] decoded_frame caller should pass in a pointer to an
* amqp_frame_t struct. If there is enough data in received_data for a
* complete frame, decoded_frame->frame_type will be set to something OTHER
* than 0. decoded_frame may contain members pointing to memory owned by
* the state object. This memory can be recycled with
* amqp_maybe_release_buffers() or amqp_maybe_release_buffers_on_channel().
* \return number of bytes consumed from received_data or 0 if a 0-length
* buffer was passed. A negative return value indicates failure. Possible
* errors:
* - AMQP_STATUS_NO_MEMORY failure in allocating memory. The library is likely
* in an indeterminate state making recovery unlikely. Client should note the
* error and terminate the application
* - AMQP_STATUS_BAD_AMQP_DATA bad AMQP data was received. The connection
* should be shutdown immediately
* - AMQP_STATUS_UNKNOWN_METHOD: an unknown method was received from the
* broker. This is likely a protocol error and the connection should be
* shutdown immediately
* - AMQP_STATUS_UNKNOWN_CLASS: a properties frame with an unknown class
* was received from the broker. This is likely a protocol error and the
* connection should be shutdown immediately
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_handle_input(amqp_connection_state_t state,
amqp_bytes_t received_data,
amqp_frame_t *decoded_frame);
/**
* Check to see if connection memory can be released
*
* \deprecated This function is deprecated in favor of
* amqp_maybe_release_buffers() or amqp_maybe_release_buffers_on_channel()
*
* Checks the state of an amqp_connection_state_t object to see if
* amqp_release_buffers() can be called successfully.
*
* \param [in] state the connection object
* \returns TRUE if the buffers can be released FALSE otherwise
*
* \sa amqp_release_buffers() amqp_maybe_release_buffers()
* amqp_maybe_release_buffers_on_channel()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_boolean_t AMQP_CALL amqp_release_buffers_ok(amqp_connection_state_t state);
/**
* Release amqp_connection_state_t owned memory
*
* \deprecated This function is deprecated in favor of
* amqp_maybe_release_buffers() or amqp_maybe_release_buffers_on_channel()
*
* \warning caller should ensure amqp_release_buffers_ok() returns true before
* calling this function. Failure to do so may result in abort() being called.
*
* Release memory owned by the amqp_connection_state_t for reuse by the
* library. Use of any memory returned by the library before this function is
* called will result in undefined behavior.
*
* \note internally rabbitmq-c tries to reuse memory when possible. As a result
* its possible calling this function may not have a noticeable effect on
* memory usage.
*
* \param [in] state the connection object
*
* \sa amqp_release_buffers_ok() amqp_maybe_release_buffers()
* amqp_maybe_release_buffers_on_channel()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_release_buffers(amqp_connection_state_t state);
/**
* Release amqp_connection_state_t owned memory
*
* Release memory owned by the amqp_connection_state_t object related to any
* channel, allowing reuse by the library. Use of any memory returned by the
* library before this function is called with result in undefined behavior.
*
* \note internally rabbitmq-c tries to reuse memory when possible. As a result
* its possible calling this function may not have a noticeable effect on
* memory usage.
*
* \param [in] state the connection object
*
* \sa amqp_maybe_release_buffers_on_channel()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_maybe_release_buffers(amqp_connection_state_t state);
/**
* Release amqp_connection_state_t owned memory related to a channel
*
* Release memory owned by the amqp_connection_state_t object related to the
* specified channel, allowing reuse by the library. Use of any memory returned
* the library for a specific channel will result in undefined behavior.
*
* \note internally rabbitmq-c tries to reuse memory when possible. As a result
* its possible calling this function may not have a noticeable effect on
* memory usage.
*
* \param [in] state the connection object
* \param [in] channel the channel specifier for which memory should be
* released. Note that the library does not care about the state of the
* channel when calling this function
*
* \sa amqp_maybe_release_buffers()
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_maybe_release_buffers_on_channel(
amqp_connection_state_t state, amqp_channel_t channel);
/**
* Send a frame to the broker
*
* \param [in] state the connection object
* \param [in] frame the frame to send to the broker
* \return AMQP_STATUS_OK on success, an amqp_status_enum value on error.
* Possible error codes:
* - AMQP_STATUS_BAD_AMQP_DATA the serialized form of the method or
* properties was too large to fit in a single AMQP frame, or the
* method contains an invalid value. The frame was not sent.
* - AMQP_STATUS_TABLE_TOO_BIG the serialized form of an amqp_table_t is
* too large to fit in a single AMQP frame. Frame was not sent.
* - AMQP_STATUS_UNKNOWN_METHOD an invalid method type was passed in
* - AMQP_STATUS_UNKNOWN_CLASS an invalid properties type was passed in
* - AMQP_STATUS_TIMER_FAILURE system timer indicated failure. The frame
* was sent
* - AMQP_STATUS_SOCKET_ERROR
* - AMQP_STATUS_SSL_ERROR
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_send_frame(amqp_connection_state_t state,
amqp_frame_t const *frame);
/**
* Compare two table entries
*
* Works just like strcmp(), comparing two the table keys, datatype, then values
*
* \param [in] entry1 the entry on the left
* \param [in] entry2 the entry on the right
* \return 0 if entries are equal, 0 < if left is greater, 0 > if right is
* greater
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_table_entry_cmp(void const *entry1, void const *entry2);
/**
* Open a socket to a remote host
*
* \deprecated This function is deprecated in favor of amqp_socket_open()
*
* Looks up the hostname, then attempts to open a socket to the host using
* the specified portnumber. It also sets various options on the socket to
* improve performance and correctness.
*
* \param [in] hostname this can be a hostname or IP address.
* Both IPv4 and IPv6 are acceptable
* \param [in] portnumber the port to connect on. RabbitMQ brokers
* listen on port 5672, and 5671 for SSL
* \return a positive value indicates success and is the sockfd. A negative
* value (see amqp_status_enum)is returned on failure. Possible error codes:
* - AMQP_STATUS_TCP_SOCKETLIB_INIT_ERROR Initialization of underlying socket
* library failed.
* - AMQP_STATUS_HOSTNAME_RESOLUTION_FAILED hostname lookup failed.
* - AMQP_STATUS_SOCKET_ERROR a socket error occurred. errno or
* WSAGetLastError() may return more useful information.
*
* \note IPv6 support was added in v0.3
*
* \sa amqp_socket_open() amqp_set_sockfd()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_open_socket(char const *hostname, int portnumber);
/**
* Send initial AMQP header to the broker
*
* \warning this is a low level function intended for those who want to
* interact with the broker at a very low level. Use of this function without
* understanding what it does will result in AMQP protocol errors.
*
* This function sends the AMQP protocol header to the broker.
*
* \param [in] state the connection object
* \return AMQP_STATUS_OK on success, a negative value on failure. Possible
* error codes:
* - AMQP_STATUS_CONNECTION_CLOSED the connection to the broker was closed.
* - AMQP_STATUS_SOCKET_ERROR a socket error occurred. It is likely the
* underlying socket has been closed. errno or WSAGetLastError() may provide
* further information.
* - AMQP_STATUS_SSL_ERROR a SSL error occurred. The connection to the broker
* was closed.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_send_header(amqp_connection_state_t state);
/**
* Checks to see if there are any incoming frames ready to be read
*
* Checks to see if there are any amqp_frame_t objects buffered by the
* amqp_connection_state_t object. Having one or more frames buffered means
* that amqp_simple_wait_frame() or amqp_simple_wait_frame_noblock() will
* return a frame without potentially blocking on a read() call.
*
* \param [in] state the connection object
* \return TRUE if there are frames enqueued, FALSE otherwise
*
* \sa amqp_simple_wait_frame() amqp_simple_wait_frame_noblock()
* amqp_data_in_buffer()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_boolean_t AMQP_CALL amqp_frames_enqueued(amqp_connection_state_t state);
/**
* Read a single amqp_frame_t
*
* Waits for the next amqp_frame_t frame to be read from the broker.
* This function has the potential to block for a long time in the case of
* waiting for a basic.deliver method frame from the broker.
*
* The library may buffer frames. When an amqp_connection_state_t object
* has frames buffered calling amqp_simple_wait_frame() will return an
* amqp_frame_t without entering a blocking read(). You can test to see if
* an amqp_connection_state_t object has frames buffered by calling the
* amqp_frames_enqueued() function.
*
* The library has a socket read buffer. When there is data in an
* amqp_connection_state_t read buffer, amqp_simple_wait_frame() may return an
* amqp_frame_t without entering a blocking read(). You can test to see if an
* amqp_connection_state_t object has data in its read buffer by calling the
* amqp_data_in_buffer() function.
*
* \param [in] state the connection object
* \param [out] decoded_frame the frame
* \return AMQP_STATUS_OK on success, an amqp_status_enum value
* is returned otherwise. Possible errors include:
* - AMQP_STATUS_NO_MEMORY failure in allocating memory. The library is likely
* in an indeterminate state making recovery unlikely. Client should note the
* error and terminate the application
* - AMQP_STATUS_BAD_AMQP_DATA bad AMQP data was received. The connection
* should be shutdown immediately
* - AMQP_STATUS_UNKNOWN_METHOD: an unknown method was received from the
* broker. This is likely a protocol error and the connection should be
* shutdown immediately
* - AMQP_STATUS_UNKNOWN_CLASS: a properties frame with an unknown class
* was received from the broker. This is likely a protocol error and the
* connection should be shutdown immediately
* - AMQP_STATUS_HEARTBEAT_TIMEOUT timed out while waiting for heartbeat
* from the broker. The connection has been closed.
* - AMQP_STATUS_TIMER_FAILURE system timer indicated failure.
* - AMQP_STATUS_SOCKET_ERROR a socket error occurred. The connection has
* been closed
* - AMQP_STATUS_SSL_ERROR a SSL socket error occurred. The connection has
* been closed.
*
* \sa amqp_simple_wait_frame_noblock() amqp_frames_enqueued()
* amqp_data_in_buffer()
*
* \note as of v0.4.0 this function will no longer return heartbeat frames
* when enabled by specifying a non-zero heartbeat value in amqp_login().
* Heartbeating is handled internally by the library.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_simple_wait_frame(amqp_connection_state_t state,
amqp_frame_t *decoded_frame);
/**
* Read a single amqp_frame_t with a timeout.
*
* Waits for the next amqp_frame_t frame to be read from the broker, up to
* a timespan specified by tv. The function will return AMQP_STATUS_TIMEOUT
* if the timeout is reached. The tv value is not modified by the function.
*
* If a 0 timeval is specified, the function behaves as if its non-blocking: it
* will test to see if a frame can be read from the broker, and return
* immediately.
*
* If NULL is passed in for tv, the function will behave like
* amqp_simple_wait_frame() and block until a frame is received from the broker
*
* The library may buffer frames. When an amqp_connection_state_t object
* has frames buffered calling amqp_simple_wait_frame_noblock() will return an
* amqp_frame_t without entering a blocking read(). You can test to see if an
* amqp_connection_state_t object has frames buffered by calling the
* amqp_frames_enqueued() function.
*
* The library has a socket read buffer. When there is data in an
* amqp_connection_state_t read buffer, amqp_simple_wait_frame_noblock() may
* return
* an amqp_frame_t without entering a blocking read(). You can test to see if an
* amqp_connection_state_t object has data in its read buffer by calling the
* amqp_data_in_buffer() function.
*
* \note This function does not return heartbeat frames. When enabled,
* heartbeating is handed internally internally by the library.
*
* \param [in,out] state the connection object
* \param [out] decoded_frame the frame
* \param [in] tv the maximum time to wait for a frame to be read. Setting
* tv->tv_sec = 0 and tv->tv_usec = 0 will do a non-blocking read. Specifying
* NULL for tv will make the function block until a frame is read.
* \return AMQP_STATUS_OK on success. An amqp_status_enum value is returned
* otherwise. Possible errors include:
* - AMQP_STATUS_TIMEOUT the timeout was reached while waiting for a frame
* from the broker.
* - AMQP_STATUS_INVALID_PARAMETER the tv parameter contains an invalid value.
* - AMQP_STATUS_NO_MEMORY failure in allocating memory. The library is likely
* in an indeterminate state making recovery unlikely. Client should note the
* error and terminate the application
* - AMQP_STATUS_BAD_AMQP_DATA bad AMQP data was received. The connection
* should be shutdown immediately
* - AMQP_STATUS_UNKNOWN_METHOD: an unknown method was received from the
* broker. This is likely a protocol error and the connection should be
* shutdown immediately
* - AMQP_STATUS_UNKNOWN_CLASS: a properties frame with an unknown class
* was received from the broker. This is likely a protocol error and the
* connection should be shutdown immediately
* - AMQP_STATUS_HEARTBEAT_TIMEOUT timed out while waiting for heartbeat
* from the broker. The connection has been closed.
* - AMQP_STATUS_TIMER_FAILURE system timer indicated failure.
* - AMQP_STATUS_SOCKET_ERROR a socket error occurred. The connection has
* been closed
* - AMQP_STATUS_SSL_ERROR a SSL socket error occurred. The connection has
* been closed.
*
* \sa amqp_simple_wait_frame() amqp_frames_enqueued() amqp_data_in_buffer()
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_simple_wait_frame_noblock(amqp_connection_state_t state,
amqp_frame_t *decoded_frame,
struct timeval *tv);
/**
* Waits for a specific method from the broker
*
* \warning You probably don't want to use this function. If this function
* doesn't receive exactly the frame requested it closes the whole connection.
*
* Waits for a single method on a channel from the broker.
* If a frame is received that does not match expected_channel
* or expected_method the program will abort
*
* \param [in] state the connection object
* \param [in] expected_channel the channel that the method should be delivered
* on
* \param [in] expected_method the method to wait for
* \param [out] output the method
* \returns AMQP_STATUS_OK on success. An amqp_status_enum value is returned
* otherwise. Possible errors include:
* - AMQP_STATUS_WRONG_METHOD a frame containing the wrong method, wrong frame
* type or wrong channel was received. The connection is closed.
* - AMQP_STATUS_NO_MEMORY failure in allocating memory. The library is likely
* in an indeterminate state making recovery unlikely. Client should note the
* error and terminate the application
* - AMQP_STATUS_BAD_AMQP_DATA bad AMQP data was received. The connection
* should be shutdown immediately
* - AMQP_STATUS_UNKNOWN_METHOD: an unknown method was received from the
* broker. This is likely a protocol error and the connection should be
* shutdown immediately
* - AMQP_STATUS_UNKNOWN_CLASS: a properties frame with an unknown class
* was received from the broker. This is likely a protocol error and the
* connection should be shutdown immediately
* - AMQP_STATUS_HEARTBEAT_TIMEOUT timed out while waiting for heartbeat
* from the broker. The connection has been closed.
* - AMQP_STATUS_TIMER_FAILURE system timer indicated failure.
* - AMQP_STATUS_SOCKET_ERROR a socket error occurred. The connection has
* been closed
* - AMQP_STATUS_SSL_ERROR a SSL socket error occurred. The connection has
* been closed.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_simple_wait_method(amqp_connection_state_t state,
amqp_channel_t expected_channel,
amqp_method_number_t expected_method,
amqp_method_t *output);
/**
* Sends a method to the broker
*
* This is a thin wrapper around amqp_send_frame(), providing a way to send
* a method to the broker on a specified channel.
*
* \param [in] state the connection object
* \param [in] channel the channel object
* \param [in] id the method number
* \param [in] decoded the method object
* \returns AMQP_STATUS_OK on success, an amqp_status_enum value otherwise.
* Possible errors include:
* - AMQP_STATUS_BAD_AMQP_DATA the serialized form of the method or
* properties was too large to fit in a single AMQP frame, or the
* method contains an invalid value. The frame was not sent.
* - AMQP_STATUS_TABLE_TOO_BIG the serialized form of an amqp_table_t is
* too large to fit in a single AMQP frame. Frame was not sent.
* - AMQP_STATUS_UNKNOWN_METHOD an invalid method type was passed in
* - AMQP_STATUS_UNKNOWN_CLASS an invalid properties type was passed in
* - AMQP_STATUS_TIMER_FAILURE system timer indicated failure. The frame
* was sent
* - AMQP_STATUS_SOCKET_ERROR
* - AMQP_STATUS_SSL_ERROR
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_send_method(amqp_connection_state_t state,
amqp_channel_t channel, amqp_method_number_t id,
void *decoded);
/**
* Sends a method to the broker and waits for a method response
*
* \param [in] state the connection object
* \param [in] channel the channel object
* \param [in] request_id the method number of the request
* \param [in] expected_reply_ids a 0 terminated array of expected response
* method numbers
* \param [in] decoded_request_method the method to be sent to the broker
* \return a amqp_rpc_reply_t:
* - r.reply_type == AMQP_RESPONSE_NORMAL. RPC completed successfully
* - r.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION. The broker returned an
* exception:
* - If r.reply.id == AMQP_CHANNEL_CLOSE_METHOD a channel exception
* occurred, cast r.reply.decoded to amqp_channel_close_t* to see details
* of the exception. The client should amqp_send_method() a
* amqp_channel_close_ok_t. The channel must be re-opened before it
* can be used again. Any resources associated with the channel
* (auto-delete exchanges, auto-delete queues, consumers) are invalid
* and must be recreated before attempting to use them again.
* - If r.reply.id == AMQP_CONNECTION_CLOSE_METHOD a connection exception
* occurred, cast r.reply.decoded to amqp_connection_close_t* to see
* details of the exception. The client amqp_send_method() a
* amqp_connection_close_ok_t and disconnect from the broker.
* - r.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION. An exception occurred
* within the library. Examine r.library_error and compare it against
* amqp_status_enum values to determine the error.
*
* \sa amqp_simple_rpc_decoded()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_simple_rpc(
amqp_connection_state_t state, amqp_channel_t channel,
amqp_method_number_t request_id, amqp_method_number_t *expected_reply_ids,
void *decoded_request_method);
/**
* Sends a method to the broker and waits for a method response
*
* \param [in] state the connection object
* \param [in] channel the channel object
* \param [in] request_id the method number of the request
* \param [in] reply_id the method number expected in response
* \param [in] decoded_request_method the request method
* \return a pointer to the method returned from the broker, or NULL on error.
* On error amqp_get_rpc_reply() will return an amqp_rpc_reply_t with
* details on the error that occurred.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
void *AMQP_CALL amqp_simple_rpc_decoded(amqp_connection_state_t state,
amqp_channel_t channel,
amqp_method_number_t request_id,
amqp_method_number_t reply_id,
void *decoded_request_method);
/**
* Get the last global amqp_rpc_reply
*
* The API methods corresponding to most synchronous AMQP methods
* return a pointer to the decoded method result. Upon error, they
* return NULL, and we need some way of discovering what, if anything,
* went wrong. amqp_get_rpc_reply() returns the most recent
* amqp_rpc_reply_t instance corresponding to such an API operation
* for the given connection.
*
* Only use it for operations that do not themselves return
* amqp_rpc_reply_t; operations that do return amqp_rpc_reply_t
* generally do NOT update this per-connection-global amqp_rpc_reply_t
* instance.
*
* \param [in] state the connection object
* \return the most recent amqp_rpc_reply_t:
* - r.reply_type == AMQP_RESPONSE_NORMAL. RPC completed successfully
* - r.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION. The broker returned an
* exception:
* - If r.reply.id == AMQP_CHANNEL_CLOSE_METHOD a channel exception
* occurred, cast r.reply.decoded to amqp_channel_close_t* to see details
* of the exception. The client should amqp_send_method() a
* amqp_channel_close_ok_t. The channel must be re-opened before it
* can be used again. Any resources associated with the channel
* (auto-delete exchanges, auto-delete queues, consumers) are invalid
* and must be recreated before attempting to use them again.
* - If r.reply.id == AMQP_CONNECTION_CLOSE_METHOD a connection exception
* occurred, cast r.reply.decoded to amqp_connection_close_t* to see
* details of the exception. The client amqp_send_method() a
* amqp_connection_close_ok_t and disconnect from the broker.
* - r.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION. An exception occurred
* within the library. Examine r.library_error and compare it against
* amqp_status_enum values to determine the error.
*
* \sa amqp_simple_rpc_decoded()
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_get_rpc_reply(amqp_connection_state_t state);
/**
* Login to the broker
*
* After using amqp_open_socket and amqp_set_sockfd, call
* amqp_login to complete connecting to the broker
*
* \param [in] state the connection object
* \param [in] vhost the virtual host to connect to on the broker. The default
* on most brokers is "/"
* \param [in] channel_max the limit for number of channels for the connection.
* 0 means no limit, and is a good default
* (AMQP_DEFAULT_MAX_CHANNELS)
* Note that the maximum number of channels the protocol supports
* is 65535 (2^16, with the 0-channel reserved). The server can
* set a lower channel_max and then the client will use the lowest
* of the two
* \param [in] frame_max the maximum size of an AMQP frame on the wire to
* request of the broker for this connection. 4096 is the minimum
* size, 2^31-1 is the maximum, a good default is 131072 (128KB),
* or AMQP_DEFAULT_FRAME_SIZE
* \param [in] heartbeat the number of seconds between heartbeat frames to
* request of the broker. A value of 0 disables heartbeats.
* Note rabbitmq-c only has partial support for heartbeats, as of
* v0.4.0 they are only serviced during amqp_basic_publish() and
* amqp_simple_wait_frame()/amqp_simple_wait_frame_noblock()
* \param [in] sasl_method the SASL method to authenticate with the broker.
* followed by the authentication information. The following SASL
* methods are implemented:
* - AMQP_SASL_METHOD_PLAIN, the AMQP_SASL_METHOD_PLAIN argument
* should be followed by two arguments in this order:
* const char* username, and const char* password.
* - AMQP_SASL_METHOD_EXTERNAL, the AMQP_SASL_METHOD_EXTERNAL
* argument should be followed one argument:
* const char* identity.
* \return amqp_rpc_reply_t indicating success or failure.
* - r.reply_type == AMQP_RESPONSE_NORMAL. Login completed successfully
* - r.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION. In most cases errors
* from the broker when logging in will be represented by the broker closing
* the socket. In this case r.library_error will be set to
* AMQP_STATUS_CONNECTION_CLOSED. This error can represent a number of
* error conditions including: invalid vhost, authentication failure.
* - r.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION. The broker returned an
* exception:
* - If r.reply.id == AMQP_CHANNEL_CLOSE_METHOD a channel exception
* occurred, cast r.reply.decoded to amqp_channel_close_t* to see details
* of the exception. The client should amqp_send_method() a
* amqp_channel_close_ok_t. The channel must be re-opened before it
* can be used again. Any resources associated with the channel
* (auto-delete exchanges, auto-delete queues, consumers) are invalid
* and must be recreated before attempting to use them again.
* - If r.reply.id == AMQP_CONNECTION_CLOSE_METHOD a connection exception
* occurred, cast r.reply.decoded to amqp_connection_close_t* to see
* details of the exception. The client amqp_send_method() a
* amqp_connection_close_ok_t and disconnect from the broker.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_login(amqp_connection_state_t state,
char const *vhost, int channel_max,
int frame_max, int heartbeat,
amqp_sasl_method_enum sasl_method, ...);
/**
* Login to the broker passing a properties table
*
* This function is similar to amqp_login() and differs in that it provides a
* way to pass client properties to the broker. This is commonly used to
* negotiate newer protocol features as they are supported by the broker.
*
* \param [in] state the connection object
* \param [in] vhost the virtual host to connect to on the broker. The default
* on most brokers is "/"
* \param [in] channel_max the limit for the number of channels for the
* connection.
* 0 means no limit, and is a good default
* (AMQP_DEFAULT_MAX_CHANNELS)
* Note that the maximum number of channels the protocol supports
* is 65535 (2^16, with the 0-channel reserved). The server can
* set a lower channel_max and then the client will use the lowest
* of the two
* \param [in] frame_max the maximum size of an AMQP frame ont he wire to
* request of the broker for this connection. 4096 is the minimum
* size, 2^31-1 is the maximum, a good default is 131072 (128KB),
* or AMQP_DEFAULT_FRAME_SIZE
* \param [in] heartbeat the number of seconds between heartbeat frame to
* request of the broker. A value of 0 disables heartbeats.
* Note rabbitmq-c only has partial support for hearts, as of
* v0.4.0 heartbeats are only serviced during amqp_basic_publish(),
* and amqp_simple_wait_frame()/amqp_simple_wait_frame_noblock()
* \param [in] properties a table of properties to send the broker.
* \param [in] sasl_method the SASL method to authenticate with the broker
* followed by the authentication information. The following SASL
* methods are implemented:
* - AMQP_SASL_METHOD_PLAIN, the AMQP_SASL_METHOD_PLAIN argument
* should be followed by two arguments in this order:
* const char* username, and const char* password.
* - AMQP_SASL_METHOD_EXTERNAL, the AMQP_SASL_METHOD_EXTERNAL
* argument should be followed one argument:
* const char* identity.
* \return amqp_rpc_reply_t indicating success or failure.
* - r.reply_type == AMQP_RESPONSE_NORMAL. Login completed successfully
* - r.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION. In most cases errors
* from the broker when logging in will be represented by the broker closing
* the socket. In this case r.library_error will be set to
* AMQP_STATUS_CONNECTION_CLOSED. This error can represent a number of
* error conditions including: invalid vhost, authentication failure.
* - r.reply_type == AMQP_RESPONSE_SERVER_EXCEPTION. The broker returned an
* exception:
* - If r.reply.id == AMQP_CHANNEL_CLOSE_METHOD a channel exception
* occurred, cast r.reply.decoded to amqp_channel_close_t* to see details
* of the exception. The client should amqp_send_method() a
* amqp_channel_close_ok_t. The channel must be re-opened before it
* can be used again. Any resources associated with the channel
* (auto-delete exchanges, auto-delete queues, consumers) are invalid
* and must be recreated before attempting to use them again.
* - If r.reply.id == AMQP_CONNECTION_CLOSE_METHOD a connection exception
* occurred, cast r.reply.decoded to amqp_connection_close_t* to see
* details of the exception. The client amqp_send_method() a
* amqp_connection_close_ok_t and disconnect from the broker.
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_login_with_properties(
amqp_connection_state_t state, char const *vhost, int channel_max,
int frame_max, int heartbeat, const amqp_table_t *properties,
amqp_sasl_method_enum sasl_method, ...);
struct amqp_basic_properties_t_;
/**
* Publish a message to the broker
*
* Publish a message on an exchange with a routing key.
*
* Note that at the AMQ protocol level basic.publish is an async method:
* this means error conditions that occur on the broker (such as publishing to
* a non-existent exchange) will not be reflected in the return value of this
* function.
*
* \param [in] state the connection object
* \param [in] channel the channel identifier
* \param [in] exchange the exchange on the broker to publish to
* \param [in] routing_key the routing key to use when publishing the message
* \param [in] mandatory indicate to the broker that the message MUST be routed
* to a queue. If the broker cannot do this it should respond with
* a basic.return method.
* \param [in] immediate indicate to the broker that the message MUST be
* delivered to a consumer immediately. If the broker cannot do this
* it should respond with a basic.return method.
* \param [in] properties the properties associated with the message
* \param [in] body the message body
* \return AMQP_STATUS_OK on success, amqp_status_enum value on failure. Note
* that basic.publish is an async method, the return value from this
* function only indicates that the message data was successfully
* transmitted to the broker. It does not indicate failures that occur
* on the broker, such as publishing to a non-existent exchange.
* Possible error values:
* - AMQP_STATUS_TIMER_FAILURE: system timer facility returned an error
* the message was not sent.
* - AMQP_STATUS_HEARTBEAT_TIMEOUT: connection timed out waiting for a
* heartbeat from the broker. The message was not sent.
* - AMQP_STATUS_NO_MEMORY: memory allocation failed. The message was
* not sent.
* - AMQP_STATUS_TABLE_TOO_BIG: a table in the properties was too large
* to fit in a single frame. Message was not sent.
* - AMQP_STATUS_CONNECTION_CLOSED: the connection was closed.
* - AMQP_STATUS_SSL_ERROR: a SSL error occurred.
* - AMQP_STATUS_TCP_ERROR: a TCP error occurred. errno or
* WSAGetLastError() may provide more information
*
* Note: this function does heartbeat processing as of v0.4.0
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_basic_publish(
amqp_connection_state_t state, amqp_channel_t channel,
amqp_bytes_t exchange, amqp_bytes_t routing_key, amqp_boolean_t mandatory,
amqp_boolean_t immediate, struct amqp_basic_properties_t_ const *properties,
amqp_bytes_t body);
/**
* Closes an channel
*
* \param [in] state the connection object
* \param [in] channel the channel identifier
* \param [in] code the reason for closing the channel, AMQP_REPLY_SUCCESS is a
* good default
* \return amqp_rpc_reply_t indicating success or failure
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_channel_close(amqp_connection_state_t state,
amqp_channel_t channel, int code);
/**
* Closes the entire connection
*
* Implicitly closes all channels and informs the broker the connection
* is being closed, after receiving acknowledgment from the broker it closes
* the socket.
*
* \param [in] state the connection object
* \param [in] code the reason code for closing the connection.
* AMQP_REPLY_SUCCESS is a good default.
* \return amqp_rpc_reply_t indicating the result
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_connection_close(amqp_connection_state_t state,
int code);
/**
* Acknowledges a message
*
* Does a basic.ack on a received message
*
* \param [in] state the connection object
* \param [in] channel the channel identifier
* \param [in] delivery_tag the delivery tag of the message to be ack'd
* \param [in] multiple if true, ack all messages up to this delivery tag, if
* false ack only this delivery tag
* \return 0 on success, 0 > on failing to send the ack to the broker.
* this will not indicate failure if something goes wrong on the
* broker
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_basic_ack(amqp_connection_state_t state,
amqp_channel_t channel, uint64_t delivery_tag,
amqp_boolean_t multiple);
/**
* Do a basic.get
*
* Synchonously polls the broker for a message in a queue, and
* retrieves the message if a message is in the queue.
*
* \param [in] state the connection object
* \param [in] channel the channel identifier to use
* \param [in] queue the queue name to retrieve from
* \param [in] no_ack if true the message is automatically ack'ed
* if false amqp_basic_ack should be called once the message
* retrieved has been processed
* \return amqp_rpc_reply indicating success or failure
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_basic_get(amqp_connection_state_t state,
amqp_channel_t channel,
amqp_bytes_t queue,
amqp_boolean_t no_ack);
/**
* Do a basic.reject
*
* Actively reject a message that has been delivered
*
* \param [in] state the connection object
* \param [in] channel the channel identifier
* \param [in] delivery_tag the delivery tag of the message to reject
* \param [in] requeue indicate to the broker whether it should requeue the
* message or just discard it.
* \return 0 on success, 0 > on failing to send the reject method to the broker.
* This will not indicate failure if something goes wrong on the
* broker.
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_basic_reject(amqp_connection_state_t state,
amqp_channel_t channel, uint64_t delivery_tag,
amqp_boolean_t requeue);
/**
* Do a basic.nack
*
* Actively reject a message, this has the same effect as amqp_basic_reject()
* however, amqp_basic_nack() can negatively acknowledge multiple messages with
* one call much like amqp_basic_ack() can acknowledge mutliple messages with
* one call.
*
* \param [in] state the connection object
* \param [in] channel the channel identifier
* \param [in] delivery_tag the delivery tag of the message to reject
* \param [in] multiple if set to 1 negatively acknowledge all unacknowledged
* messages on this channel.
* \param [in] requeue indicate to the broker whether it should requeue the
* message or dead-letter it.
* \return AMQP_STATUS_OK on success, an amqp_status_enum value otherwise.
*
* \since v0.5.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_basic_nack(amqp_connection_state_t state,
amqp_channel_t channel, uint64_t delivery_tag,
amqp_boolean_t multiple, amqp_boolean_t requeue);
/**
* Check to see if there is data left in the receive buffer
*
* Can be used to see if there is data still in the buffer, if so
* calling amqp_simple_wait_frame will not immediately enter a
* blocking read.
*
* \param [in] state the connection object
* \return true if there is data in the recieve buffer, false otherwise
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
amqp_boolean_t AMQP_CALL amqp_data_in_buffer(amqp_connection_state_t state);
/**
* Get the error string for the given error code.
*
* \deprecated This function has been deprecated in favor of
* \ref amqp_error_string2() which returns statically allocated
* string which do not need to be freed by the caller.
*
* The returned string resides on the heap; the caller is responsible
* for freeing it.
*
* \param [in] err return error code
* \return the error string
*
* \since v0.1
*/
AMQP_DEPRECATED(
AMQP_PUBLIC_FUNCTION char *AMQP_CALL amqp_error_string(int err));
/**
* Get the error string for the given error code.
*
* Get an error string associated with an error code. The string is statically
* allocated and does not need to be freed
*
* \param [in] err the error code
* \return the error string
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
const char *AMQP_CALL amqp_error_string2(int err);
/**
* Deserialize an amqp_table_t from AMQP wireformat
*
* This is an internal function and is not typically used by
* client applications
*
* \param [in] encoded the buffer containing the serialized data
* \param [in] pool memory pool used to allocate the table entries from
* \param [in] output the amqp_table_t structure to fill in. Any existing
* entries will be erased
* \param [in,out] offset The offset into the encoded buffer to start
* reading the serialized table. It will be updated
* by this function to end of the table
* \return AMQP_STATUS_OK on success, an amqp_status_enum value on failure
* Possible error codes:
* - AMQP_STATUS_NO_MEMORY out of memory
* - AMQP_STATUS_BAD_AMQP_DATA invalid wireformat
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_decode_table(amqp_bytes_t encoded, amqp_pool_t *pool,
amqp_table_t *output, size_t *offset);
/**
* Serializes an amqp_table_t to the AMQP wireformat
*
* This is an internal function and is not typically used by
* client applications
*
* \param [in] encoded the buffer where to serialize the table to
* \param [in] input the amqp_table_t to serialize
* \param [in,out] offset The offset into the encoded buffer to start
* writing the serialized table. It will be updated
* by this function to where writing left off
* \return AMQP_STATUS_OK on success, an amqp_status_enum value on failure
* Possible error codes:
* - AMQP_STATUS_TABLE_TOO_BIG the serialized form is too large for the
* buffer
* - AMQP_STATUS_BAD_AMQP_DATA invalid table
*
* \since v0.1
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_encode_table(amqp_bytes_t encoded, amqp_table_t *input,
size_t *offset);
/**
* Create a deep-copy of an amqp_table_t object
*
* Creates a deep-copy of an amqp_table_t object, using the provided pool
* object to allocate the necessary memory. This memory can be freed later by
* call recycle_amqp_pool(), or empty_amqp_pool()
*
* \param [in] original the table to copy
* \param [in,out] clone the table to copy to
* \param [in] pool the initialized memory pool to do allocations for the table
* from
* \return AMQP_STATUS_OK on success, amqp_status_enum value on failure.
* Possible error values:
* - AMQP_STATUS_NO_MEMORY - memory allocation failure.
* - AMQP_STATUS_INVALID_PARAMETER - invalid table (e.g., no key name)
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_table_clone(const amqp_table_t *original,
amqp_table_t *clone, amqp_pool_t *pool);
/**
* A message object
*
* \since v0.4.0
*/
typedef struct amqp_message_t_ {
amqp_basic_properties_t properties; /**< message properties */
amqp_bytes_t body; /**< message body */
amqp_pool_t pool; /**< pool used to allocate properties */
} amqp_message_t;
/**
* Reads the next message on a channel
*
* Reads a complete message (header + body) on a specified channel. This
* function is intended to be used with amqp_basic_get() or when an
* AMQP_BASIC_DELIVERY_METHOD method is received.
*
* \param [in,out] state the connection object
* \param [in] channel the channel on which to read the message from
* \param [in,out] message a pointer to a amqp_message_t object. Caller should
* call amqp_message_destroy() when it is done using the
* fields in the message object. The caller is responsible for
* allocating/destroying the amqp_message_t object itself.
* \param [in] flags pass in 0. Currently unused.
* \returns a amqp_rpc_reply_t object. ret.reply_type == AMQP_RESPONSE_NORMAL on
* success.
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_read_message(amqp_connection_state_t state,
amqp_channel_t channel,
amqp_message_t *message,
int flags);
/**
* Frees memory associated with a amqp_message_t allocated in amqp_read_message
*
* \param [in] message
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_destroy_message(amqp_message_t *message);
/**
* Envelope object
*
* \since v0.4.0
*/
typedef struct amqp_envelope_t_ {
amqp_channel_t channel; /**< channel message was delivered on */
amqp_bytes_t
consumer_tag; /**< the consumer tag the message was delivered to */
uint64_t delivery_tag; /**< the messages delivery tag */
amqp_boolean_t redelivered; /**< flag indicating whether this message is being
redelivered */
amqp_bytes_t exchange; /**< exchange this message was published to */
amqp_bytes_t
routing_key; /**< the routing key this message was published with */
amqp_message_t message; /**< the message */
} amqp_envelope_t;
/**
* Wait for and consume a message
*
* Waits for a basic.deliver method on any channel, upon receipt of
* basic.deliver it reads that message, and returns. If any other method is
* received before basic.deliver, this function will return an amqp_rpc_reply_t
* with ret.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION, and
* ret.library_error == AMQP_STATUS_UNEXPECTED_STATE. The caller should then
* call amqp_simple_wait_frame() to read this frame and take appropriate action.
*
* This function should be used after starting a consumer with the
* amqp_basic_consume() function
*
* \param [in,out] state the connection object
* \param [in,out] envelope a pointer to a amqp_envelope_t object. Caller
* should call #amqp_destroy_envelope() when it is done using
* the fields in the envelope object. The caller is responsible
* for allocating/destroying the amqp_envelope_t object itself.
* \param [in] timeout a timeout to wait for a message delivery. Passing in
* NULL will result in blocking behavior.
* \param [in] flags pass in 0. Currently unused.
* \returns a amqp_rpc_reply_t object. ret.reply_type == AMQP_RESPONSE_NORMAL
* on success. If ret.reply_type == AMQP_RESPONSE_LIBRARY_EXCEPTION,
* and ret.library_error == AMQP_STATUS_UNEXPECTED_STATE, a frame other
* than AMQP_BASIC_DELIVER_METHOD was received, the caller should call
* amqp_simple_wait_frame() to read this frame and take appropriate
* action.
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
amqp_rpc_reply_t AMQP_CALL amqp_consume_message(amqp_connection_state_t state,
amqp_envelope_t *envelope,
struct timeval *timeout,
int flags);
/**
* Frees memory associated with a amqp_envelope_t allocated in
* amqp_consume_message()
*
* \param [in] envelope
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL amqp_destroy_envelope(amqp_envelope_t *envelope);
/**
* Parameters used to connect to the RabbitMQ broker
*
* \since v0.2
*/
struct amqp_connection_info {
char *user; /**< the username to authenticate with the broker, default on most
broker is 'guest' */
char *password; /**< the password to authenticate with the broker, default on
most brokers is 'guest' */
char *host; /**< the hostname of the broker */
char *vhost; /**< the virtual host on the broker to connect to, a good default
is "/" */
int port; /**< the port that the broker is listening on, default on most
brokers is 5672 */
amqp_boolean_t ssl;
};
/**
* Initialze an amqp_connection_info to default values
*
* The default values are:
* - user: "guest"
* - password: "guest"
* - host: "localhost"
* - vhost: "/"
* - port: 5672
*
* \param [out] parsed the connection info to set defaults on
*
* \since v0.2
*/
AMQP_PUBLIC_FUNCTION
void AMQP_CALL
amqp_default_connection_info(struct amqp_connection_info *parsed);
/**
* Parse a connection URL
*
* An amqp connection url takes the form:
*
* amqp://[$USERNAME[:$PASSWORD]\@]$HOST[:$PORT]/[$VHOST]
*
* Examples:
* amqp://guest:guest\@localhost:5672//
* amqp://guest:guest\@localhost/myvhost
*
* Any missing parts of the URL will be set to the defaults specified in
* amqp_default_connection_info. For amqps: URLs the default port will be set
* to 5671 instead of 5672 for non-SSL URLs.
*
* \note This function modifies url parameter.
*
* \param [in] url URI to parse, note that this parameter is modified by the
* function.
* \param [out] parsed the connection info gleaned from the URI. The char*
* members will point to parts of the url input parameter.
* Memory management will depend on how the url is allocated.
* \returns AMQP_STATUS_OK on success, AMQP_STATUS_BAD_URL on failure
*
* \since v0.2
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_parse_url(char *url, struct amqp_connection_info *parsed);
/* socket API */
/**
* Open a socket connection.
*
* This function opens a socket connection returned from amqp_tcp_socket_new()
* or amqp_ssl_socket_new(). This function should be called after setting
* socket options and prior to assigning the socket to an AMQP connection with
* amqp_set_socket().
*
* \param [in,out] self A socket object.
* \param [in] host Connect to this host.
* \param [in] port Connect on this remote port.
*
* \return AMQP_STATUS_OK on success, an amqp_status_enum on failure
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_socket_open(amqp_socket_t *self, const char *host, int port);
/**
* Open a socket connection.
*
* This function opens a socket connection returned from amqp_tcp_socket_new()
* or amqp_ssl_socket_new(). This function should be called after setting
* socket options and prior to assigning the socket to an AMQP connection with
* amqp_set_socket().
*
* \param [in,out] self A socket object.
* \param [in] host Connect to this host.
* \param [in] port Connect on this remote port.
* \param [in] timeout Max allowed time to spent on opening. If NULL - run in
* blocking mode
*
* \return AMQP_STATUS_OK on success, an amqp_status_enum on failure.
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_socket_open_noblock(amqp_socket_t *self, const char *host,
int port, struct timeval *timeout);
/**
* Get the socket descriptor in use by a socket object.
*
* Retrieve the underlying socket descriptor. This function can be used to
* perform low-level socket operations that aren't supported by the socket
* interface. Use with caution!
*
* \param [in,out] self A socket object.
*
* \return The underlying socket descriptor, or -1 if there is no socket
* descriptor associated with
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_socket_get_sockfd(amqp_socket_t *self);
/**
* Get the socket object associated with a amqp_connection_state_t
*
* \param [in] state the connection object to get the socket from
* \return a pointer to the socket object, or NULL if one has not been assigned
*
* \since v0.4.0
*/
AMQP_PUBLIC_FUNCTION
amqp_socket_t *AMQP_CALL amqp_get_socket(amqp_connection_state_t state);
/**
* Get the broker properties table
*
* \param [in] state the connection object
* \return a pointer to an amqp_table_t containing the properties advertised
* by the broker on connection. The connection object owns the table, it
* should not be modified.
*
* \since v0.5.0
*/
AMQP_PUBLIC_FUNCTION
amqp_table_t *AMQP_CALL
amqp_get_server_properties(amqp_connection_state_t state);
/**
* Get the client properties table
*
* Get the properties that were passed to the broker on connection.
*
* \param [in] state the connection object
* \return a pointer to an amqp_table_t containing the properties advertised
* by the client on connection. The connection object owns the table, it
* should not be modified.
*
* \since v0.7.0
*/
AMQP_PUBLIC_FUNCTION
amqp_table_t *AMQP_CALL
amqp_get_client_properties(amqp_connection_state_t state);
/**
* Get the login handshake timeout.
*
* amqp_login and amqp_login_with_properties perform the login handshake with
* the broker. This function returns the timeout associated with completing
* this operation from the client side. This value can be set by using the
* amqp_set_handshake_timeout.
*
* Note that the RabbitMQ broker has configurable timeout for completing the
* login handshake, the default is 10 seconds. rabbitmq-c has a default of 12
* seconds.
*
* \param [in] state the connection object
* \return a struct timeval representing the current login timeout for the state
* object. A NULL value represents an infinite timeout. The memory returned is
* owned by the connection object.
*
* \since v0.9.0
*/
AMQP_PUBLIC_FUNCTION
struct timeval *AMQP_CALL
amqp_get_handshake_timeout(amqp_connection_state_t state);
/**
* Set the login handshake timeout.
*
* amqp_login and amqp_login_with_properties perform the login handshake with
* the broker. This function sets the timeout associated with completing this
* operation from the client side.
*
* The timeout must be set before amqp_login or amqp_login_with_properties is
* called to change from the default timeout.
*
* Note that the RabbitMQ broker has a configurable timeout for completing the
* login handshake, the default is 10 seconds. rabbitmq-c has a default of 12
* seconds.
*
* \param [in] state the connection object
* \param [in] timeout a struct timeval* representing new login timeout for the
* state object. NULL represents an infinite timeout. The value of timeout is
* copied internally, the caller is responsible for ownership of the passed in
* pointer, it does not need to remain valid after this function is called.
* \return AMQP_STATUS_OK on success.
*
* \since v0.9.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_set_handshake_timeout(amqp_connection_state_t state,
struct timeval *timeout);
/**
* Get the RPC timeout
*
* Gets the timeout for any RPC-style AMQP command (e.g., amqp_queue_declare).
* This timeout may be changed at any time by calling \amqp_set_rpc_timeout
* function with a new timeout. The timeout applies individually to each RPC
* that is made.
*
* The default value is NULL, or an infinite timeout.
*
* When an RPC times out, the function will return an error AMQP_STATUS_TIMEOUT,
* and the connection will be closed.
*
*\warning RPC-timeouts are an advanced feature intended to be used to detect
* dead connections quickly when the rabbitmq-c implementation of heartbeats
* does not work. Do not use RPC timeouts unless you understand the implications
* of doing so.
*
* \param [in] state the connection object
* \return a struct timeval representing the current RPC timeout for the state
* object. A NULL value represents an infinite timeout. The memory returned is
* owned by the connection object.
*
* \since v0.9.0
*/
AMQP_PUBLIC_FUNCTION
struct timeval *AMQP_CALL amqp_get_rpc_timeout(amqp_connection_state_t state);
/**
* Set the RPC timeout
*
* Sets the timeout for any RPC-style AMQP command (e.g., amqp_queue_declare).
* This timeout may be changed at any time by calling this function with a new
* timeout. The timeout applies individually to each RPC that is made.
*
* The default value is NULL, or an infinite timeout.
*
* When an RPC times out, the function will return an error AMQP_STATUS_TIMEOUT,
* and the connection will be closed.
*
*\warning RPC-timeouts are an advanced feature intended to be used to detect
* dead connections quickly when the rabbitmq-c implementation of heartbeats
* does not work. Do not use RPC timeouts unless you understand the implications
* of doing so.
*
* \param [in] state the connection object
* \param [in] timeout a struct timeval* representing new RPC timeout for the
* state object. NULL represents an infinite timeout. The value of timeout is
* copied internally, the caller is responsible for ownership of the passed
* pointer, it does not need to remain valid after this function is called.
* \return AMQP_STATUS_SUCCESS on success.
*
* \since v0.9.0
*/
AMQP_PUBLIC_FUNCTION
int AMQP_CALL amqp_set_rpc_timeout(amqp_connection_state_t state,
struct timeval *timeout);
AMQP_END_DECLS
#endif /* AMQP_H */