diff options
author | Ask Solem <ask@celeryproject.org> | 2014-04-14 17:29:03 +0100 |
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committer | Ask Solem <ask@celeryproject.org> | 2014-04-14 17:29:03 +0100 |
commit | be3000b4c84d7503f5ef4067de44ff16d060d158 (patch) | |
tree | fecacb0f149b067202c443b59aad3cc027a0ff1c /librabbitmq/amqp.h | |
parent | dcb8edaccd6e164d624edfab0f3120d96f707f0a (diff) | |
parent | fe844e41ffad5691607982cbfe4054aacdcb81e0 (diff) | |
download | rabbitmq-c-github-ask-be3000b4c84d7503f5ef4067de44ff16d060d158.tar.gz |
Merge branch 'alanxz/master'
Conflicts:
Makefile.am
codegen
Diffstat (limited to 'librabbitmq/amqp.h')
-rw-r--r-- | librabbitmq/amqp.h | 1932 |
1 files changed, 1781 insertions, 151 deletions
diff --git a/librabbitmq/amqp.h b/librabbitmq/amqp.h index 7f479c8..82b7c02 100644 --- a/librabbitmq/amqp.h +++ b/librabbitmq/amqp.h @@ -1,4 +1,5 @@ /* vim:set ft=c ts=2 sw=2 sts=2 et cindent: */ +/** \file */ /* * ***** BEGIN LICENSE BLOCK ***** * Version: MIT @@ -37,6 +38,8 @@ #ifndef AMQP_H #define AMQP_H +/** \cond HIDE_FROM_DOXYGEN */ + #ifdef __cplusplus #define AMQP_BEGIN_DECLS extern "C" { #define AMQP_END_DECLS } @@ -45,11 +48,13 @@ #define AMQP_END_DECLS #endif -/** Important API Decorators - * AMQP_PUBLIC_FUNCTION - Declares an exportable function - * AMQP_PUBLIC_VARIABLE - Declares an exportable variable - * AMQP_CALL - Declares the calling convention - */ +/* + * \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) @@ -149,6 +154,12 @@ typedef _W64 int ssize_t; #endif #endif +#if defined(_WIN32) && defined(__MINGW32__) +#include <sys/types.h> +#endif + +/** \endcond */ + #include <stddef.h> #include <stdint.h> @@ -156,29 +167,257 @@ 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 5 +#define AMQP_VERSION_PATCH 1 +#define AMQP_VERSION_IS_RELEASE 0 + + +/** + * \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 + * + * \since v0.4.0 + */ +#define AMQP_VERSION ((AMQP_VERSION_MAJOR << 24) | \ + (AMQP_VERSION_MINOR << 16) | \ + (AMQP_VERSION_PATCH << 8) | \ + (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 + +/** + * 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; - void *bytes; + 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; - uint32_t value; + 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; - struct amqp_table_entry_t_ *entries; + 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; - struct amqp_field_value_t_ *entries; + int num_entries; /**< Number of entries in the table */ + struct amqp_field_value_t_ *entries; /**< linked list of field values */ } amqp_array_t; /* @@ -220,214 +459,615 @@ 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; + uint8_t kind; /**< the type of the entry /sa amqp_field_value_kind_t */ union { - amqp_boolean_t boolean; - int8_t i8; - uint8_t u8; - int16_t i16; - uint16_t u16; - int32_t i32; - uint32_t u32; - int64_t i64; - uint64_t u64; - float f32; - double f64; - amqp_decimal_t decimal; - amqp_bytes_t bytes; - amqp_table_t table; - amqp_array_t array; - } value; + 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; - amqp_field_value_t value; + 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', - AMQP_FIELD_KIND_I8 = 'b', - AMQP_FIELD_KIND_U8 = 'B', - AMQP_FIELD_KIND_I16 = 's', - AMQP_FIELD_KIND_U16 = 'u', - AMQP_FIELD_KIND_I32 = 'I', - AMQP_FIELD_KIND_U32 = 'i', - AMQP_FIELD_KIND_I64 = 'l', - AMQP_FIELD_KIND_U64 = 'L', - AMQP_FIELD_KIND_F32 = 'f', - AMQP_FIELD_KIND_F64 = 'd', - AMQP_FIELD_KIND_DECIMAL = 'D', - AMQP_FIELD_KIND_UTF8 = 'S', - AMQP_FIELD_KIND_ARRAY = 'A', - AMQP_FIELD_KIND_TIMESTAMP = 'T', - AMQP_FIELD_KIND_TABLE = 'F', - AMQP_FIELD_KIND_VOID = 'V', - AMQP_FIELD_KIND_BYTES = 'x' + 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; - void **blocklist; + 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; - - amqp_pool_blocklist_t pages; - amqp_pool_blocklist_t large_blocks; - - int next_page; - char *alloc_block; - size_t alloc_used; + 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 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; - void *decoded; + 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; /* 0 means no event */ - amqp_channel_t channel; + 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; + amqp_method_t method; /**< a method, use if frame_type == AMQP_FRAME_METHOD */ struct { - uint16_t class_id; - uint64_t body_size; - void *decoded; - amqp_bytes_t raw; - } properties; - amqp_bytes_t body_fragment; + 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; - uint8_t transport_low; - uint8_t protocol_version_major; - uint8_t protocol_version_minor; - } protocol_header; - } payload; + 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, - AMQP_RESPONSE_NORMAL, - AMQP_RESPONSE_LIBRARY_EXCEPTION, - AMQP_RESPONSE_SERVER_EXCEPTION + 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; - amqp_method_t reply; - int library_error; /* if AMQP_RESPONSE_LIBRARY_EXCEPTION, then 0 here means socket EOF */ + 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_PLAIN = 0 + AMQP_SASL_METHOD_PLAIN = 0 /**< the PLAIN SASL method for authentication to the broker */ } amqp_sasl_method_enum; -/* Opaque struct. */ +/** + * 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 + */ typedef enum amqp_status_enum_ { - AMQP_STATUS_OK = 0x0, - AMQP_STATUS_NO_MEMORY = -0x0001, - AMQP_STATUS_BAD_AMQP_DATA = -0x0002, - AMQP_STATUS_UNKNOWN_CLASS = -0x0003, - AMQP_STATUS_UNKNOWN_METHOD = -0x0004, - AMQP_STATUS_HOSTNAME_RESOLUTION_FAILED= -0x0005, - AMQP_STATUS_INCOMPATIBLE_AMQP_VERSION = -0x0006, - AMQP_STATUS_CONNECTION_CLOSED = -0x0007, - AMQP_STATUS_BAD_URL = -0x0008, - AMQP_STATUS_SOCKET_ERROR = -0x0009, - AMQP_STATUS_INVALID_PARAMETER = -0x000A, - AMQP_STATUS_TABLE_TOO_BIG = -0x000B, - AMQP_STATUS_WRONG_METHOD = -0x000C, - AMQP_STATUS_TIMEOUT = -0x000D, - AMQP_STATUS_TIMER_FAILURE = -0x000E, - AMQP_STATUS_HEARTBEAT_TIMEOUT = -0x000F, - - AMQP_STATUS_TCP_ERROR = -0x0100, - AMQP_STATUS_TCP_SOCKETLIB_INIT_ERROR = -0x0101, - - AMQP_STATUS_SSL_ERROR = -0x0200, - AMQP_STATUS_SSL_HOSTNAME_VERIFY_FAILED= -0x0201, - AMQP_STATUS_SSL_PEER_VERIFY_FAILED = -0x0202, - AMQP_STATUS_SSL_CONNECTION_FAILED = -0x0203 + 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_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_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_enum; -AMQP_PUBLIC_FUNCTION -char const * -AMQP_CALL amqp_version(void); +/** + * 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 -/* Exported empty data structures */ +#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) ); -AMQP_PUBLIC_FUNCTION -void -AMQP_CALL amqp_set_socket(amqp_connection_state_t state, amqp_socket_t *socket); +/** + * 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, @@ -435,67 +1075,463 @@ AMQP_CALL amqp_tune_connection(amqp_connection_state_t state, 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); +/** + * 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); +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, @@ -503,6 +1539,32 @@ AMQP_CALL amqp_simple_wait_method(amqp_connection_state_t state, 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, @@ -510,6 +1572,38 @@ AMQP_CALL amqp_send_method(amqp_connection_state_t state, 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, @@ -518,6 +1612,20 @@ AMQP_CALL amqp_simple_rpc(amqp_connection_state_t state, 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, @@ -526,7 +1634,9 @@ AMQP_CALL amqp_simple_rpc_decoded(amqp_connection_state_t state, 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, @@ -538,17 +1648,143 @@ AMQP_CALL amqp_simple_rpc_decoded(amqp_connection_state_t state, * 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) + * \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. + * For AMQP_SASL_METHOD_PLAIN, the AMQP_SASL_METHOD_PLAIN + * should be followed by two arguments in this order: + * const char* username, and const char* password. + * \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) + * \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. + * For AMQP_SASL_METHOD_PLAN, the AMQP_SASL_METHOD_PLAIN parameter + * should be followed by two arguments in this order: + * const char* username, and const char* password. + * \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, @@ -557,6 +1793,52 @@ AMQP_CALL amqp_login_with_properties(amqp_connection_state_t state, char const * 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. + * + * in the return value from 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.reject 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 + * response with a basic.reject 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, @@ -565,51 +1847,153 @@ AMQP_CALL amqp_basic_publish(amqp_connection_state_t state, amqp_channel_t chann 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 acknowldgement 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. * - * Possibly amqp_frames_enqueued should be used for this? + * \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 + * \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 + * for freeing it. + * + * \param [in] err return error code + * \return the error string * + * \since v0.1 */ AMQP_DEPRECATED( AMQP_PUBLIC_FUNCTION @@ -617,33 +2001,257 @@ AMQP_DEPRECATED( 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(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_FRAME. 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_FRAME, 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; - char *password; - char *host; - char *vhost; - int port; + 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 + * + * \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); @@ -662,7 +2270,9 @@ AMQP_CALL amqp_parse_url(char *url, struct amqp_connection_info *parsed); * \param [in] host Connect to this host. * \param [in] port Connect on this remote port. * - * \return Zero upon success, non-zero otherwise. + * \return AMQP_STATUS_OK on success, an amqp_status_enum on failure + * + * \since v0.4.0 */ AMQP_PUBLIC_FUNCTION int @@ -670,54 +2280,74 @@ AMQP_CALL amqp_socket_open(amqp_socket_t *self, const char *host, int port); /** - * Close a socket connection and free resources. + * Open a socket connection. * - * This function closes a socket connection and releases any resources used by - * the object. After calling this function the specified socket should no - * longer be referenced. + * 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. * - * \return Zero upon success, non-zero otherwise. + * \since v0.4.0 */ AMQP_PUBLIC_FUNCTION int AMQP_CALL -amqp_socket_close(amqp_socket_t *self); +amqp_socket_open_noblock(amqp_socket_t *self, const char *host, int port, struct timeval *timeout); /** - * Retrieve an error code for the last socket operation. + * Get the socket descriptor in use by a socket object. * - * At the time of writing, this interface is not well supported and is subject - * to changes! + * 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 Zero upon success, an opaque error code otherwise + * \return The underlying socket descriptor, or -1 if there is no socket descriptor + * associated with + * with + * + * \since v0.4.0 */ AMQP_PUBLIC_FUNCTION int AMQP_CALL -amqp_socket_error(amqp_socket_t *self); +amqp_socket_get_sockfd(amqp_socket_t *self); /** - * Get the socket descriptor in use by a socket object. + * Get the socket object associated with a amqp_connection_state_t * - * 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] state the connection object to get the socket from + * \return a pointer to the socket object, or NULL if one has not been assigned * - * \param [in,out] self A socket object. + * \since v0.4.0 + */ +AMQP_PUBLIC_FUNCTION +amqp_socket_t * +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. * - * \return The underlying socket descriptor. + * \since v0.5.0 */ AMQP_PUBLIC_FUNCTION -int -AMQP_CALL -amqp_socket_get_sockfd(amqp_socket_t *self); +amqp_table_t * +amqp_get_server_properties(amqp_connection_state_t state); AMQP_END_DECLS -#include <amqp_framing.h> #endif /* AMQP_H */ |