Linux Manuals session 3

mode_end_call – At the end of a series of requests, call another handler hook. Functions netsnmp_mib_handler * netsnmp_get_mode_end_call_handler (netsnmp_mode_handler_list *endlist) returns a mode_end_call handler that can be injected into a given handler chain. netsnmp_mode_handler_list * netsnmp_mode_end_call_add_mode_callback (netsnmp_mode_handler_list *endlist, int mode, netsnmp_mib_handler *callbackh) adds a mode specific callback to the callback list. int netsnmp_mode_end_call_helper (netsnmp_mib_handler *handler,…

mib parsing and datatype manipulation routines. – Data Structures struct _PrefixList struct parse_hints Typedefs typedef _PrefixList * PrefixListPtr typedef _PrefixList PrefixList Enumerations enum inet_address_type { IPV4 = 1, IPV6 = 2, IPV4Z = 3, IPV6Z = 4, DNS = 16 } Functions int _sprint_hexstring_line (u_char **buf, size_t *buf_len, size_t *out_len, int allow_realloc, const u_char *cp,…

add_mibdir, netsnmp_init_mib, shutdown_mib, netsnmp_read_module, read_mib, read_all_mibs, add_module_replacement, snmp_set_mib_errors, snmp_set_mib_warnings, snmp_set_save_descriptions, read_objid, snmp_parse_oid, get_module_node, print_mib, print_objid, fprint_objid, snprint_objid, print_description, fprint_description, snprint_description – netsnmp_mib_api functions Synopsis #include <net-snmp/mib_api.h> Initialisation and Shutdown int add_mibdir(const char *dirname); void netsnmp_init_mib(void); void shutdown_mib(void); Reading and Parsing MIBs struct tree * netsnmp_read_module(const char *name); struct tree *read_mib(const char *filename); struct tree *read_all_mibs(void);…

The Net-SNMP library – Modules asn1 parsing and datatype manipulation routines. Note on. A generic callback mechanism generic linked-list data handling with a string as a key. storage space for defaults The purpose of the default storage is three-fold:. mib parsing and datatype manipulation routines. Store and retrieve data referenced by an OID. This is…

leaf_handlers – Process individual leaf objects A group of handlers to implement individual leaf objects and instances (both scalar objects, and individual objects and instances within a table). Modules instance Process individual MIB instances easily. scalar Process scalars easily. scalar_group Process groups of scalars. watcher Watch a specified variable and process it as an instance…

iterator_info_s – Holds iterator information containing functions which should be called by the iterator_handler to loop over your data set and sort it in a SNMP specific manner. Synopsis Data Fields netsnmp_container c Netsnmp_Iterator_Loop_Key * get_first Netsnmp_Iterator_Loop_Key * get_next Netsnmp_Iterator_Loop_Data * get_data Netsnmp_Iterator_Data * free_user_ctx Netsnmp_Iterator_Ctx * init_loop_ctx Netsnmp_Iterator_Ctx * cleanup_loop_ctx Netsnmp_Iterator_Ctx_Dup * save_pos Netsnmp_Iterator_Data…

instance – Process individual MIB instances easily. Functions netsnmp_mib_handler * netsnmp_get_instance_handler (void) Creates an instance helper handler, calls netsnmp_create_handler, which then could be registered, using netsnmp_register_handler(). int netsnmp_register_instance (netsnmp_handler_registration *reginfo) This function registers an instance helper handler, which is a way of registering an exact OID such that GENEXT requests are handled entirely by the…

add_mibdir, netsnmp_init_mib, shutdown_mib, netsnmp_read_module, read_mib, read_all_mibs, add_module_replacement, snmp_set_mib_errors, snmp_set_mib_warnings, snmp_set_save_descriptions, read_objid, snmp_parse_oid, get_module_node, print_mib, print_objid, fprint_objid, snprint_objid, print_description, fprint_description, snprint_description – netsnmp_mib_api functions Synopsis #include <net-snmp/mib_api.h> Initialisation and Shutdown int add_mibdir(const char *dirname); void netsnmp_init_mib(void); void shutdown_mib(void); Reading and Parsing MIBs struct tree * netsnmp_read_module(const char *name); struct tree *read_mib(const char *filename); struct tree *read_all_mibs(void);…

Net-SNMP Agent handler and extensibility API – The basic theory goes something like this: In the past, with the original mib module api (which derived from the original CMU SNMP code) the underlying mib modules were passed very little information (only the truly most basic information about a request). Modules utility_handlers Simplify request processing A…

example_scalar_int: instantiates a few example scalars. – This example merely creates some scalar registrations that allows some simple variables to be accessed via SNMP. More… Functions void init_scalar_int (void) Detailed Description This example merely creates some scalar registrations that allows some simple variables to be accessed via SNMP. In a more realistic example, it is…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

default_store – generic storage of global data. Synopsis #include <net-snmp/net-snmp-config.h> #include <net-snmp/config_api.h> 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,…

debug – Print out debugging information about the handler chain being called. handler void netsnmp_init_serialize (void) initializes the serialize helper which then registers a serialize handler as a run-time injectable handler for configuration file use. void netsnmp_init_read_only_helper (void) initializes the read_only helper which then registers a read_only handler as a run-time injectable handler for configuration…