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maxminddb.h
#ifdef __cplusplus extern "C" { #endif #ifndef MAXMINDDB_H #define MAXMINDDB_H /* Request POSIX.1-2008. However, we want to remain compatible with * POSIX.1-2001 (since we have been historically and see no reason to drop * compatibility). By requesting POSIX.1-2008, we can conditionally use * features provided by that standard if the implementation provides it. We can * check for what the implementation provides by checking the _POSIX_VERSION * macro after including unistd.h. If a feature is in POSIX.1-2008 but not * POSIX.1-2001, check that macro before using the feature (or check for the * feature directly if possible). */ #ifndef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200809L #endif #include "maxminddb_config.h" #include <stdarg.h> #include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <sys/types.h> #ifdef _WIN32 #include <winsock2.h> #include <ws2tcpip.h> /* libmaxminddb package version from configure */ #define PACKAGE_VERSION "1.5.2" typedef ADDRESS_FAMILY sa_family_t; #if defined(_MSC_VER) /* MSVC doesn't define signed size_t, copy it from configure */ #define ssize_t SSIZE_T /* MSVC doesn't support restricted pointers */ #define restrict #endif #else #include <netdb.h> #include <netinet/in.h> #include <sys/socket.h> #endif #define MMDB_DATA_TYPE_EXTENDED (0) #define MMDB_DATA_TYPE_POINTER (1) #define MMDB_DATA_TYPE_UTF8_STRING (2) #define MMDB_DATA_TYPE_DOUBLE (3) #define MMDB_DATA_TYPE_BYTES (4) #define MMDB_DATA_TYPE_UINT16 (5) #define MMDB_DATA_TYPE_UINT32 (6) #define MMDB_DATA_TYPE_MAP (7) #define MMDB_DATA_TYPE_INT32 (8) #define MMDB_DATA_TYPE_UINT64 (9) #define MMDB_DATA_TYPE_UINT128 (10) #define MMDB_DATA_TYPE_ARRAY (11) #define MMDB_DATA_TYPE_CONTAINER (12) #define MMDB_DATA_TYPE_END_MARKER (13) #define MMDB_DATA_TYPE_BOOLEAN (14) #define MMDB_DATA_TYPE_FLOAT (15) #define MMDB_RECORD_TYPE_SEARCH_NODE (0) #define MMDB_RECORD_TYPE_EMPTY (1) #define MMDB_RECORD_TYPE_DATA (2) #define MMDB_RECORD_TYPE_INVALID (3) /* flags for open */ #define MMDB_MODE_MMAP (1) #define MMDB_MODE_MASK (7) /* error codes */ #define MMDB_SUCCESS (0) #define MMDB_FILE_OPEN_ERROR (1) #define MMDB_CORRUPT_SEARCH_TREE_ERROR (2) #define MMDB_INVALID_METADATA_ERROR (3) #define MMDB_IO_ERROR (4) #define MMDB_OUT_OF_MEMORY_ERROR (5) #define MMDB_UNKNOWN_DATABASE_FORMAT_ERROR (6) #define MMDB_INVALID_DATA_ERROR (7) #define MMDB_INVALID_LOOKUP_PATH_ERROR (8) #define MMDB_LOOKUP_PATH_DOES_NOT_MATCH_DATA_ERROR (9) #define MMDB_INVALID_NODE_NUMBER_ERROR (10) #define MMDB_IPV6_LOOKUP_IN_IPV4_DATABASE_ERROR (11) #if !(MMDB_UINT128_IS_BYTE_ARRAY) #if MMDB_UINT128_USING_MODE typedef unsigned int mmdb_uint128_t __attribute__((__mode__(TI))); #else typedef unsigned __int128 mmdb_uint128_t; #endif #endif /* This is a pointer into the data section for a given IP address lookup */ typedef struct MMDB_entry_s { const struct MMDB_s *mmdb; uint32_t offset; } MMDB_entry_s; typedef struct MMDB_lookup_result_s { bool found_entry; MMDB_entry_s entry; uint16_t netmask; } MMDB_lookup_result_s; typedef struct MMDB_entry_data_s { bool has_data; union { uint32_t pointer; const char *utf8_string; double double_value; const uint8_t *bytes; uint16_t uint16; uint32_t uint32; int32_t int32; uint64_t uint64; #if MMDB_UINT128_IS_BYTE_ARRAY uint8_t uint128[16]; #else mmdb_uint128_t uint128; #endif bool boolean; float float_value; }; /* This is a 0 if a given entry cannot be found. This can only happen * when a call to MMDB_(v)get_value() asks for hash keys or array * indices that don't exist. */ uint32_t offset; /* This is the next entry in the data section, but it's really only * relevant for entries that part of a larger map or array * struct. There's no good reason for an end user to look at this * directly. */ uint32_t offset_to_next; /* This is only valid for strings, utf8_strings or binary data */ uint32_t data_size; /* This is an MMDB_DATA_TYPE_* constant */ uint32_t type; } MMDB_entry_data_s; /* This is the return type when someone asks for all the entry data in a map or * array */ typedef struct MMDB_entry_data_list_s { MMDB_entry_data_s entry_data; struct MMDB_entry_data_list_s *next; void *pool; } MMDB_entry_data_list_s; typedef struct MMDB_description_s { const char *language; const char *description; } MMDB_description_s; /* WARNING: do not add new fields to this struct without bumping the SONAME. * The struct is allocated by the users of this library and increasing the * size will cause existing users to allocate too little space when the shared * library is upgraded */ typedef struct MMDB_metadata_s { uint32_t node_count; uint16_t record_size; uint16_t ip_version; const char *database_type; struct { size_t count; const char **names; } languages; uint16_t binary_format_major_version; uint16_t binary_format_minor_version; uint64_t build_epoch; struct { size_t count; MMDB_description_s **descriptions; } description; /* See above warning before adding fields */ } MMDB_metadata_s; /* WARNING: do not add new fields to this struct without bumping the SONAME. * The struct is allocated by the users of this library and increasing the * size will cause existing users to allocate too little space when the shared * library is upgraded */ typedef struct MMDB_ipv4_start_node_s { uint16_t netmask; uint32_t node_value; /* See above warning before adding fields */ } MMDB_ipv4_start_node_s; /* WARNING: do not add new fields to this struct without bumping the SONAME. * The struct is allocated by the users of this library and increasing the * size will cause existing users to allocate too little space when the shared * library is upgraded */ typedef struct MMDB_s { uint32_t flags; const char *filename; ssize_t file_size; const uint8_t *file_content; const uint8_t *data_section; uint32_t data_section_size; const uint8_t *metadata_section; uint32_t metadata_section_size; uint16_t full_record_byte_size; uint16_t depth; MMDB_ipv4_start_node_s ipv4_start_node; MMDB_metadata_s metadata; /* See above warning before adding fields */ } MMDB_s; typedef struct MMDB_search_node_s { uint64_t left_record; uint64_t right_record; uint8_t left_record_type; uint8_t right_record_type; MMDB_entry_s left_record_entry; MMDB_entry_s right_record_entry; } MMDB_search_node_s; extern int MMDB_open(const char *const filename, uint32_t flags, MMDB_s *const mmdb); extern MMDB_lookup_result_s MMDB_lookup_string(const MMDB_s *const mmdb, const char *const ipstr, int *const gai_error, int *const mmdb_error); extern MMDB_lookup_result_s MMDB_lookup_sockaddr(const MMDB_s *const mmdb, const struct sockaddr *const sockaddr, int *const mmdb_error); extern int MMDB_read_node(const MMDB_s *const mmdb, uint32_t node_number, MMDB_search_node_s *const node); extern int MMDB_get_value(MMDB_entry_s *const start, MMDB_entry_data_s *const entry_data, ...); extern int MMDB_vget_value(MMDB_entry_s *const start, MMDB_entry_data_s *const entry_data, va_list va_path); extern int MMDB_aget_value(MMDB_entry_s *const start, MMDB_entry_data_s *const entry_data, const char *const *const path); extern int MMDB_get_metadata_as_entry_data_list( const MMDB_s *const mmdb, MMDB_entry_data_list_s **const entry_data_list); extern int MMDB_get_entry_data_list(MMDB_entry_s *start, MMDB_entry_data_list_s **const entry_data_list); extern void MMDB_free_entry_data_list(MMDB_entry_data_list_s *const entry_data_list); extern void MMDB_close(MMDB_s *const mmdb); extern const char *MMDB_lib_version(void); extern int MMDB_dump_entry_data_list(FILE *const stream, MMDB_entry_data_list_s *const entry_data_list, int indent); extern const char *MMDB_strerror(int error_code); #endif /* MAXMINDDB_H */ #ifdef __cplusplus } #endif
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