MMT Data Types

Definition

[TOC]

MMT Data types are defined in order to provide an harmonized type definitions for MMT Attributes.

API

Supported Data Types

The list of supported data types is defined in types_defs.h.

   MMT_UNDEFINED_TYPE, /**< no type constant value */

Constant that identifies an undefined type.

   MMT_U8_DATA, /**< unsigned 1-byte constant value */

Identifier of unsigned char type. It has a length of 1 octet.

   MMT_U16_DATA, /**< unsigned 2-bytes constant value */

Identifier of unsigned short type. It has a length of 2 octets.

   MMT_U32_DATA, /**< unsigned 4-bytes constant value */

Identifier of unsigned int type. It has a length of 4 octets.

   MMT_U64_DATA, /**< unsigned 8-bytes constant value */

Identifier of unsigned long long type. It has a length of 8 octet.

   MMT_DATA_POINTER, /**< pointer constant value (size is CPU dependant) */

Identifier of pointer type. Its length is CPU dependant.

   MMT_DATA_MAC_ADDR, /**< ethernet mac address constant value */

Identifier of IEEE 802.1 MAC address (ethernet address). It has a length of 6 octets.

   MMT_DATA_IP_ADDR, /**< ip address constant value */

Identifier of IPv4 address. It has a length of 4 octets (in network byte ordering).

   MMT_DATA_IP6_ADDR, /**< ip6 address constant value */

Identifier of IPv6 address. It has a length of 16 octets.

   MMT_DATA_PATH, /**< protocol path constant value */

Identifier of proto_hierarchy_t type (defined in [source:mmt/src/mmt_core/public_include/data_defs.h data_defs.h]). It has a length of sizeof(proto_hierarchy_t).

   MMT_DATA_TIMEVAL, /**< number of seconds and microseconds constant value */

Identifier of struct timeval timestamp type. It has a length of sizeof(struct timeval).

   MMT_STATS, /**< pointer to MMT Protocol statistics */

Identifier of a pointer to proto_statistics_t. Its length is CPU dependent (sizeof (void *)).

   MMT_BINARY_DATA, /**< binary constant value */

Identifier of binary data. Defined as mmt_binary_data_t in sdk/include/types_defs.h:89 — a uint32_t len followed by uint8_t data[BINARY_64DATA_LEN] (64 bytes). Total length is BINARY_64DATA_TYPE_LEN (68 bytes).

   MMT_BINARY_VAR_DATA, /**< binary constant value with variable size given by function getExtractionDataSizeByProtocolAndFieldIds */

Identifier of binary data. Defined as mmt_binary_var_data_t in sdk/include/types_defs.h:101 — a uint32_t len followed by uint8_t data[BINARY_1024DATA_LEN] (1024 bytes). Total length is BINARY_1024DATA_TYPE_LEN (1028 bytes).

   MMT_STRING_DATA, /**< text string data constant value. Len plus data. Data is expected to be '\0' terminated and maximum BINARY_64DATA_LEN long */

Identifier of a text string (null-terminated). Defined as mmt_string_data_struct in sdk/include/types_defs.h:106 — a uint32_t len followed by char data[BINARY_64DATA_LEN] (64 bytes max, null-terminated). Total length is BINARY_64DATA_TYPE_LEN (68 bytes).

   MMT_STRING_LONG_DATA_POINTER, /**< text string data constant value. Len plus data. Data is expected to be '\0' terminated and maximum STRING_DATA_LEN octets long */

Identifier of a long text string (null-terminated). Defined as MMT_STRING_LONG_DATA in sdk/include/types_defs.h:197 — a uint32_t len followed by char data[STRING_DATA_LEN] (1504 bytes max). Total length is STRING_DATA_TYPE_LEN (1508 bytes).

   MMT_STRING_DATA_POINTER, /**< pointer constant value (size is void *). The data pointed to is of type string with null terminating character included */

Identifier of a string data pointer. The data pointed to is of type string with null terminating character included. Its length is CPU dependent.

   MMT_HEADER_LINE, /**< string pointer value with variable size. The data pointed to is of type string however,  not necessary null terminating */

Identifier of a header line pointer. The data pointed to is of type string, not necessarily null-terminated. Max accepted header line length is 8k (default for Apache).

User API

   uint32_t get_data_size_by_data_type(uint32_t data_type);

Returns the size in bytes of the given data type. Zero is returned if the type is not known or invalid.

Open Issues