--- name: "default_store" section: "3snmp" platform: "linux" package: "libsnmp-dev" version: "5.4.3~dfsg-2.8+deb7u1" release: "Debian 7 (Wheezy)" platforms: ["linux"] url: "https://new.carta.tech/default_store/3snmp" --- # default\_store(3snmp) generic storage of global data. ## NAME default\_store - generic storage of global data. ## SYNOPSIS **#include \**\ **#include \** **int netsnmp\_ds\_set\_boolean(int** *store***, int** *which***, int** *val***);**\ **int netsnmp\_ds\_get\_boolean(int** *store***, int** *which***);**\ **int netsnmp\_ds\_set\_int(int** *store***, int** *which***, int** *val***);**\ **int netsnmp\_ds\_get\_int(int** *store***, int** *which***);**\ **int netsnmp\_ds\_set\_string(int** *store***, int** *which***,** \ **const char \****val***);**\ **char \*netsnmp\_ds\_get\_string(int** *store***, int** *which***);**\ **int netsnmp\_ds\_register\_config(u\_char** *type***,** \ **const char \****ftype***,**\ **const char \****token***,**\ **int** *store***, int** *which***);**\ **int netsnmp\_ds\_register\_premib(u\_char** *type***,** \ **const char \****ftype***,**\ **const char \****token***,**\ **int** *store***, int** *which***);**\ **void netsnmp\_ds\_shutdown(void);** ## DESCRIPTION The purpose of the default storage is three-fold: - 1\) To create a global storage space without creating a whole bunch of globally accessible variables or a whole bunch of access functions to work with more privately restricted variables. - 2\) To provide a single location where the thread locking needs to be implemented. At the time of this writing, however, thread locking is not yet in place. - 3\) To reduce the number of cross dependencies between code pieces that may or may not be linked together in the long run. This provides for a single location in which configuration data, for example, can be stored for a separate section of code that may not be linked in to the application in question. The functions defined here implement these goals. Currently, three data types are supported: booleans, integers, and strings. Each of these data types have separate storage spaces. In addition, the storage space for each data type is divided further by the application level. Currently, there are two storage spaces. The first is reserved for the SNMP library itself. The second is intended for use in applications and is not modified or checked by the library, and, therefore, this is the space usable by you. You can think of these storage spaces as being 3 arrays, something like bool\_storage\[storeid\]\[which\], int\_storage\[storeid\]\[which\], and string\_storage\[storeid\]\[which\]. The data is then accessed through the functions defined below. For data you wish to store, you should use a *store* parameter of **NETSNMP\_DS\_APPLICATION\_ID**. The storage space used by the library (for which the *store* parameter is **NETSNMP\_DS\_LIBRARY\_ID**) is defined in the default\_store.h file, which currently contains the following defines: ``` */ /** * @def NETSNMP_DS_LIBRARY_ID These definitions correspond with the "storid" argument to the API */ #define NETSNMP_DS_LIBRARY_ID 0 #define NETSNMP_DS_APPLICATION_ID 1 #define NETSNMP_DS_TOKEN_ID 2 /* * These definitions correspond with the "which" argument to the API, * when the storeid argument is NETSNMP_DS_LIBRARY_ID */ /* * library booleans */ #define NETSNMP_DS_LIB_MIB_ERRORS 0 #define NETSNMP_DS_LIB_SAVE_MIB_DESCRS 1 #define NETSNMP_DS_LIB_MIB_COMMENT_TERM 2 #define NETSNMP_DS_LIB_MIB_PARSE_LABEL 3 #define NETSNMP_DS_LIB_DUMP_PACKET 4 #define NETSNMP_DS_LIB_LOG_TIMESTAMP 5 #define NETSNMP_DS_LIB_DONT_READ_CONFIGS 6 /* don't read normal config files */ #define NETSNMP_DS_LIB_DISABLE_CONFIG_LOAD NETSNMP_DS_LIB_DONT_READ_CONFIGS #define NETSNMP_DS_LIB_MIB_REPLACE 7 /* replace objects from latest module */ #define NETSNMP_DS_LIB_PRINT_NUMERIC_ENUM 8 /* print only numeric enum values */ #define NETSNMP_DS_LIB_PRINT_NUMERIC_OIDS 9 /* print only numeric enum values */ #define NETSNMP_DS_LIB_DONT_BREAKDOWN_OIDS 10 /* dont print oid indexes specially */ #define NETSNMP_DS_LIB_ALARM_DONT_USE_SIG 11 /* don't use the alarm() signal */ #define NETSNMP_DS_LIB_PRINT_FULL_OID 12 /* print fully qualified oids */ #define NETSNMP_DS_LIB_QUICK_PRINT 13 /* print very brief output for parsing */ #define NETSNMP_DS_LIB_RANDOM_ACCESS 14 /* random access to oid labels */ #define NETSNMP_DS_LIB_REGEX_ACCESS 15 /* regex matching to oid labels */ #define NETSNMP_DS_LIB_DONT_CHECK_RANGE 16 /* don't check values for ranges on send */ #define NETSNMP_DS_LIB_NO_TOKEN_WARNINGS 17 /* no warn about unknown config tokens */ #define NETSNMP_DS_LIB_NUMERIC_TIMETICKS 18 /* print timeticks as a number */ #define NETSNMP_DS_LIB_ESCAPE_QUOTES 19 /* shell escape quote marks in oids */ #define NETSNMP_DS_LIB_REVERSE_ENCODE 20 /* encode packets from back to front */ #define NETSNMP_DS_LIB_PRINT_BARE_VALUE 21 /* just print value (not OID = value) */ #define NETSNMP_DS_LIB_EXTENDED_INDEX 22 /* print extended index format [x1][x2] */ #define NETSNMP_DS_LIB_PRINT_HEX_TEXT 23 /* print ASCII text along with hex strings */ #define NETSNMP_DS_LIB_PRINT_UCD_STYLE_OID 24 /* print OID's using the UCD-style prefix suppression */ #define NETSNMP_DS_LIB_READ_UCD_STYLE_OID 25 /* require top-level OIDs to be prefixed with a dot */ #define NETSNMP_DS_LIB_HAVE_READ_PREMIB_CONFIG 26 /* have the pre-mib parsing config tokens been processed */ #define NETSNMP_DS_LIB_HAVE_READ_CONFIG 27 /* have the config tokens been processed */ #define NETSNMP_DS_LIB_QUICKE_PRINT 28 #define NETSNMP_DS_LIB_DONT_PRINT_UNITS 29 /* don't print UNITS suffix */ #define NETSNMP_DS_LIB_NO_DISPLAY_HINT 30 /* don't apply DISPLAY-HINTs */ #define NETSNMP_DS_LIB_16BIT_IDS 31 /* restrict requestIDs, etc to 16-bit values */ #define NETSNMP_DS_LIB_DONT_PERSIST_STATE 32 /* don't load config and don't load/save persistent file */ #define NETSNMP_DS_LIB_2DIGIT_HEX_OUTPUT 33 /* print a leading 0 on hex values <= 'f' */ #define NETSNMP_DS_LIB_IGNORE_NO_COMMUNITY 34 /* don't complain if no community is specified in the command arguments */ #define NETSNMP_DS_LIB_DISABLE_PERSISTENT_LOAD 35 /* don't load persistent file */ #define NETSNMP_DS_LIB_DISABLE_PERSISTENT_SAVE 36 /* don't save persistent file */ #define NETSNMP_DS_LIB_APPEND_LOGFILES 37 /* append, don't overwrite, log files */ /* * library integers */ #define NETSNMP_DS_LIB_MIB_WARNINGS 0 #define NETSNMP_DS_LIB_SECLEVEL 1 #define NETSNMP_DS_LIB_SNMPVERSION 2 #define NETSNMP_DS_LIB_DEFAULT_PORT 3 #define NETSNMP_DS_LIB_OID_OUTPUT_FORMAT 4 #define NETSNMP_DS_LIB_PRINT_SUFFIX_ONLY NETSNMP_DS_LIB_OID_OUTPUT_FORMAT #define NETSNMP_DS_LIB_STRING_OUTPUT_FORMAT 5 #define NETSNMP_DS_LIB_HEX_OUTPUT_LENGTH 6 #define NETSNMP_DS_LIB_SERVERSENDBUF 7 /* send buffer (server) */ #define NETSNMP_DS_LIB_SERVERRECVBUF 8 /* receive buffer (server) */ #define NETSNMP_DS_LIB_CLIENTSENDBUF 9 /* send buffer (client) */ #define NETSNMP_DS_LIB_CLIENTRECVBUF 10 /* receive buffer (client) */ /* * special meanings for the default SNMP version slot (NETSNMP_DS_LIB_SNMPVERSION) */ #ifndef NETSNMP_DISABLE_SNMPV1 #define NETSNMP_DS_SNMP_VERSION_1 128 /* bogus */ #endif #ifndef NETSNMP_DISABLE_SNMPV2C #define NETSNMP_DS_SNMP_VERSION_2c 1 /* real */ #endif #define NETSNMP_DS_SNMP_VERSION_3 3 /* real */ /* * library strings */ #define NETSNMP_DS_LIB_SECNAME 0 #define NETSNMP_DS_LIB_CONTEXT 1 #define NETSNMP_DS_LIB_PASSPHRASE 2 #define NETSNMP_DS_LIB_AUTHPASSPHRASE 3 #define NETSNMP_DS_LIB_PRIVPASSPHRASE 4 #define NETSNMP_DS_LIB_OPTIONALCONFIG 5 #define NETSNMP_DS_LIB_APPTYPE 6 #define NETSNMP_DS_LIB_COMMUNITY 7 #define NETSNMP_DS_LIB_PERSISTENT_DIR 8 #define NETSNMP_DS_LIB_CONFIGURATION_DIR 9 #define NETSNMP_DS_LIB_SECMODEL 10 #define NETSNMP_DS_LIB_MIBDIRS 11 #define NETSNMP_DS_LIB_OIDSUFFIX 12 #define NETSNMP_DS_LIB_OIDPREFIX 13 #define NETSNMP_DS_LIB_CLIENT_ADDR 14 #define NETSNMP_DS_LIB_TEMP_FILE_PATTERN 15 #define NETSNMP_DS_LIB_AUTHMASTERKEY 16 #define NETSNMP_DS_LIB_PRIVMASTERKEY 17 #define NETSNMP_DS_LIB_AUTHLOCALIZEDKEY 18 #define NETSNMP_DS_LIB_PRIVLOCALIZEDKEY 19 #define NETSNMP_DS_LIB_APPTYPES 20 #define NETSNMP_DS_LIB_KSM_KEYTAB 21 #define NETSNMP_DS_LIB_KSM_SERVICE_NAME 22 /* ``` ## FUNCTIONS - **int netsnmp\_ds\_set\_boolean(int** *store***, int** *which***, int** *val***);** Stores *TRUE* if *val* != 0 or else *FALSE* into the bool\_storage\[store\]\[which\] slot. Returns **SNMPERR\_GENERR** if the *store* and *which* parameters do not correspond to a valid slot, or **SNMPERR\_SUCCESS** otherwise. - **int netsnmp\_ds\_get\_boolean(int** *store***, int** *which***);** Returns 1 if bool\_storage\[store\]\[which\] is *TRUE* or 0 if not. May also return **SNMPERR\_GENERR** if the *store* and *which* parameters do not correspond to a valid slot. - **int netsnmp\_ds\_set\_string(int** *store***, int** *which***, const char \****val***);** Stores *val* into the string\_storage\[store\]\[which\] slot. Returns **SNMPERR\_SUCCESS** normally, or **SNMPERR\_GENERR** if the *store* and *which* parameters do not correspond to a valid slot. - **char \*netsnmp\_ds\_get\_string(int** *store***, int** *which***);** Returns the string which has been stored in the string\_storage\[store\]\[which\] slot, or **NULL** if the *store* and *which* parameters do not correspond to a valid slot. - **netsnmp\_ds\_set\_int(int** *store***, int** *which***, int** *val***);** Stores *val* into the int\_storage\[store\]\[which\] slot. Returns **SNMPERR\_GENERR** if the *store* and *which* parameters do not correspond to a valid slot, or **SNMPERR\_SUCCESS** otherwise. - **int netsnmp\_ds\_get\_int(int** *store***, int** *which***);** Returns the integer which has been stored in the int\_storage\[store\]\[which\] slot, or **SNMPERR\_GENERR** if the *store* and *which* parameters do not correspond to a valid slot. - **void netsnmp\_ds\_shutdown(void);** Reclaims memory used to hold information gathered by **netsnmp\_ds\_register\_config** and **netsnmp\_ds\_register\_premib**. - **int netsnmp\_ds\_register\_config(u\_char** *type***, const char \****ftype***, const char \****token***, int** *store***, int** *which***);** Registers a configuration file directive *token* and attaches it to a default storage type and slot. Specifically, *store* and *which* indicate the storage slot in the data type indicated by *type,* where *type* is one of the following constants: **ASN\_BOOLEAN**, **ASN\_INTEGER**, or **ASN\_OCTET\_STR**. The *ftype* variable indicates the file name base string searched for the *token* keyword. For example, the following call: - netsnmp\_ds\_register\_config(ASN\_INTEGER, "snmp", "testtoken", DS\_APPLICATION\_ID, 5) - would indicate that when the snmp.conf file(s) were found and parsed, that any line beginning with the word "testtoken" should be read and the value after "testtoken" should be stored into the int\_storage\[DS\_APPLICATION\_ID\]\[5\] slot. For example the following line in the configuration file: - testtoken 502 - would set int\_storage\[DS\_APPLICATION\_ID\]\[5\] = 502. This function returns **SNMPERR\_SUCCESS** if the registration was made successfully, or **SNMPERR\_GENERR** if the registration was not made (perhaps because the *store* and *which* parameters do not correspond to a valid slot, or because of a memory allocation failure). - **int netsnmp\_ds\_register\_premib(u\_char** *type***, const char \****ftype***, const char \****token***, int** *store***, int** *which***);** Analogous to the preceeding function, but the *token* is processed before MIBs are read (this is therefore useful for controlling MIB processing options). ## SEE ALSO [**snmp\_config**(5)](/snmp_config/5.md), [**read\_config**(3)](/read_config/3.md)