table_data(3)

NAME
table_data - Helps you implement a table with datamatted storage.

  Modules
table_dataset
Helps you implement a table with automatted storage.

  Functions
void netsnmp_table_data_generate_index_oid (netsnmp_table_row *row)
netsnmp_table_data * netsnmp_create_table_data (const char *name)
creates and returns a pointer to table data set
netsnmp_table_row * netsnmp_create_table_data_row (void)
creates and returns a pointer to table data set
netsnmp_table_row * netsnmp_table_data_clone_row (netsnmp_table_row *row)
clones a data row.
void * netsnmp_table_data_delete_row (netsnmp_table_row *row)
deletes a row's memory.
int netsnmp_table_data_add_row (netsnmp_table_data *table, netsnmp_table_row *row)
Adds a row of data to a given table (stored in proper lexographical order).
NETSNMP_INLINE void netsnmp_table_data_replace_row (netsnmp_table_data *table, netsnmp_table_row *origrow, netsnmp_table_row *newrow)
swaps out origrow with newrow.
netsnmp_table_row * netsnmp_table_data_remove_row (netsnmp_table_data *table, netsnmp_table_row *row)
removes a row of data to a given table and returns it (no free's called)
void * netsnmp_table_data_remove_and_delete_row (netsnmp_table_data *table, netsnmp_table_row *row)
removes and frees a row of data to a given table and returns the void *
netsnmp_table_data * netsnmp_table_data_create_table (const char *name, long flags)
void netsnmp_table_data_delete_table (netsnmp_table_data *table)
netsnmp_table_row * netsnmp_table_data_create_row (void *entry)
int netsnmp_table_data_copy_row (netsnmp_table_row *old_row, netsnmp_table_row *new_row)
void * netsnmp_table_data_remove_delete_row (netsnmp_table_data *table, netsnmp_table_row *row)
netsnmp_mib_handler * netsnmp_get_table_data_handler (netsnmp_table_data *table)
Creates a table_data handler and returns it.
int netsnmp_register_table_data (netsnmp_handler_registration *reginfo, netsnmp_table_data *table, netsnmp_table_registration_info *table_info)
registers a handler as a data table.
int netsnmp_register_read_only_table_data (netsnmp_handler_registration *reginfo, netsnmp_table_data *table, netsnmp_table_registration_info *table_info)
registers a handler as a read-only data table If table_info != NULL, it registers it as a normal table too.
int netsnmp_table_data_helper_handler (netsnmp_mib_handler *handler, netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo, netsnmp_request_info *requests)
netsnmp_table_data * netsnmp_extract_table (netsnmp_request_info *request)
extracts the table being accessed passed from the table_data helper
netsnmp_table_row * netsnmp_extract_table_row (netsnmp_request_info *request)
extracts the row being accessed passed from the table_data helper
void * netsnmp_extract_table_row_data (netsnmp_request_info *request)
extracts the data from the row being accessed passed from the table_data helper
NETSNMP_INLINE void netsnmp_insert_table_row (netsnmp_request_info *request, netsnmp_table_row *row)
inserts a newly created table_data row into a request
int netsnmp_table_data_build_result (netsnmp_handler_registration *reginfo, netsnmp_agent_request_info *reqinfo, netsnmp_request_info *request, netsnmp_table_row *row, int column, u_char type, u_char *result_data, size_t result_data_len)
netsnmp_table_row * netsnmp_table_data_get_first_row (netsnmp_table_data *table)
returns the first row in the table
netsnmp_table_row * netsnmp_table_data_get_next_row (netsnmp_table_data *table, netsnmp_table_row *row)
returns the next row in the table
netsnmp_table_row * netsnmp_table_data_get (netsnmp_table_data *table, netsnmp_variable_list *indexes)
finds the data in 'datalist' stored at 'indexes'
netsnmp_table_row * netsnmp_table_data_get_from_oid (netsnmp_table_data *table, oid *searchfor, size_t searchfor_len)
finds the data in 'datalist' stored at the searchfor oid
int netsnmp_table_data_num_rows (netsnmp_table_data *table)
netsnmp_table_row * netsnmp_table_data_row_first (netsnmp_table_data *table)
netsnmp_table_row * netsnmp_table_data_row_get (netsnmp_table_data *table, netsnmp_table_row *row)
netsnmp_table_row * netsnmp_table_data_row_next (netsnmp_table_data *table, netsnmp_table_row *row)
netsnmp_table_row * netsnmp_table_data_row_get_byoid (netsnmp_table_data *table, oid *instance, size_t len)
netsnmp_table_row * netsnmp_table_data_row_next_byoid (netsnmp_table_data *table, oid *instance, size_t len)
netsnmp_table_row * netsnmp_table_data_row_get_byidx (netsnmp_table_data *table, netsnmp_variable_list *indexes)
netsnmp_table_row * netsnmp_table_data_row_next_byidx (netsnmp_table_data *table, netsnmp_variable_list *indexes)
int netsnmp_table_data_row_count (netsnmp_table_data *table)
void * netsnmp_table_data_entry_first (netsnmp_table_data *table)
void * netsnmp_table_data_entry_get (netsnmp_table_data *table, netsnmp_table_row *row)
void * netsnmp_table_data_entry_next (netsnmp_table_data *table, netsnmp_table_row *row)
void * netsnmp_table_data_entry_get_byidx (netsnmp_table_data *table, netsnmp_variable_list *indexes)
void * netsnmp_table_data_entry_next_byidx (netsnmp_table_data *table, netsnmp_variable_list *indexes)
void * netsnmp_table_data_entry_get_byoid (netsnmp_table_data *table, oid *instance, size_t len)
void * netsnmp_table_data_entry_next_byoid (netsnmp_table_data *table, oid *instance, size_t len)

Detailed Description

Helps you implement a table with datamatted storage.

This helper is obsolete. If you are writing a new module, please consider using the table_tdata helper instead.

This helper helps you implement a table where all the indexes are expected to be stored within the agent itself and not in some external storage location. It can be used to store a list of rows, where a row consists of the indexes to the table and a generic data pointer. You can then implement a subhandler which is passed the exact row definition and data it must return data for or accept data for. Complex GETNEXT handling is greatly simplified in this case.

Function Documentation

  netsnmp_table_data* netsnmp_create_table_data (const char * name)

creates and returns a pointer to table data set

Definition at line 52 of file table_data.c.

References netsnmp_table_data_s::name, and SNMP_MALLOC_TYPEDEF.

Referenced by netsnmp_create_table_data_set(), and netsnmp_table_data_create_table().

  netsnmp_table_row* netsnmp_create_table_data_row (void)

creates and returns a pointer to table data set

Examples:
data_set.c.

Definition at line 62 of file table_data.c.

References SNMP_MALLOC_TYPEDEF.

Referenced by netsnmp_config_parse_add_row(), and netsnmp_table_data_set_create_row_from_defaults().

  netsnmp_table_data* netsnmp_extract_table (netsnmp_request_info * request)

extracts the table being accessed passed from the table_data helper

Definition at line 649 of file table_data.c.

References netsnmp_request_get_list_data().

  netsnmp_table_row* netsnmp_extract_table_row (netsnmp_request_info * request)

extracts the row being accessed passed from the table_data helper

Definition at line 657 of file table_data.c.

References netsnmp_request_get_list_data().

Referenced by netsnmp_extract_table_row_data(), and netsnmp_table_data_set_helper_handler().

  void* netsnmp_extract_table_row_data (netsnmp_request_info * request)

extracts the data from the row being accessed passed from the table_data helper

Definition at line 666 of file table_data.c.

References netsnmp_table_row_s::data, netsnmp_extract_table_row(), and NULL.

Referenced by netsnmp_extract_table_data_set_column().

  netsnmp_mib_handler* netsnmp_get_table_data_handler (netsnmp_table_data * table)

Creates a table_data handler and returns it.

Definition at line 371 of file table_data.c.

References netsnmp_mib_handler_s::flags, MIB_HANDLER_AUTO_NEXT, netsnmp_mib_handler_s::myvoid, netsnmp_create_handler(), netsnmp_table_data_helper_handler(), NULL, and snmp_log().

Referenced by netsnmp_register_table_data().

  NETSNMP_INLINE void netsnmp_insert_table_row (netsnmp_request_info * request, netsnmp_table_row * row)

inserts a newly created table_data row into a request

Definition at line 678 of file table_data.c.

References build_oid_noalloc(), netsnmp_table_request_info_s::indexes, netsnmp_create_data_list(), netsnmp_extract_table_info(), netsnmp_request_add_list_data(), netsnmp_request_info_s::next, NULL, netsnmp_request_info_s::prev, and snmp_oid_compare().

  int netsnmp_register_read_only_table_data (netsnmp_handler_registration * reginfo, netsnmp_table_data * table, netsnmp_table_registration_info * table_info)

registers a handler as a read-only data table If table_info != NULL, it registers it as a normal table too.

Definition at line 405 of file table_data.c.

References netsnmp_get_read_only_handler(), netsnmp_inject_handler(), and netsnmp_register_table_data().

  int netsnmp_register_table_data (netsnmp_handler_registration * reginfo, netsnmp_table_data * table, netsnmp_table_registration_info * table_info)

registers a handler as a data table.

If table_info != NULL, it registers it as a normal table too.

Definition at line 394 of file table_data.c.

References netsnmp_get_table_data_handler(), netsnmp_inject_handler(), and netsnmp_register_table().

Referenced by netsnmp_register_read_only_table_data(), and netsnmp_register_table_data_set().

  int netsnmp_table_data_add_row (netsnmp_table_data * table, netsnmp_table_row * row)

Adds a row of data to a given table (stored in proper lexographical order).

returns SNMPERR_SUCCESS on successful addition. or SNMPERR_GENERR on failure (E.G., indexes already existed)

xxx-rks: remove invalid row?

Definition at line 130 of file table_data.c.

References netsnmp_table_data_s::first_row, netsnmp_table_row_s::index_oid, netsnmp_table_row_s::index_oid_len, netsnmp_table_row_s::indexes, netsnmp_table_data_s::last_row, netsnmp_table_data_s::name, netsnmp_table_data_generate_index_oid(), netsnmp_table_row_s::next, NULL, netsnmp_table_row_s::prev, snmp_free_varbind(), snmp_log(), snmp_oid_compare(), and netsnmp_table_data_s::store_indexes.

Referenced by netsnmp_config_parse_add_row(), netsnmp_table_data_replace_row(), and netsnmp_table_dataset_add_row().

  netsnmp_table_row* netsnmp_table_data_clone_row (netsnmp_table_row * row)

clones a data row.

DOES NOT CLONE THE CONTAINED DATA.

Definition at line 70 of file table_data.c.

References memdup(), NULL, and snmp_clone_varbind().

Referenced by netsnmp_table_data_set_clone_row().

  void* netsnmp_table_data_delete_row (netsnmp_table_row * row)

deletes a row's memory.

returns the void data that it doesn't know how to delete.

Definition at line 101 of file table_data.c.

References netsnmp_table_row_s::data, netsnmp_table_row_s::index_oid, netsnmp_table_row_s::indexes, NULL, SNMP_FREE, and snmp_free_varbind().

Referenced by netsnmp_table_data_delete_table(), netsnmp_table_data_remove_and_delete_row(), and netsnmp_table_dataset_delete_row().

  netsnmp_table_row* netsnmp_table_data_get (netsnmp_table_data * table, netsnmp_variable_list * indexes)

finds the data in 'datalist' stored at 'indexes'

Definition at line 804 of file table_data.c.

References build_oid_noalloc(), netsnmp_table_data_get_from_oid(), and NULL.

Referenced by netsnmp_table_data_row_get_byidx().

  netsnmp_table_row* netsnmp_table_data_get_first_row (netsnmp_table_data * table)

returns the first row in the table

Definition at line 785 of file table_data.c.

References netsnmp_table_data_s::first_row, and NULL.

Referenced by netsnmp_table_data_entry_first(), netsnmp_table_data_row_first(), and netsnmp_table_data_set_get_first_row().

  netsnmp_table_row* netsnmp_table_data_get_from_oid (netsnmp_table_data * table, oid * searchfor, size_t searchfor_len)

finds the data in 'datalist' stored at the searchfor oid

Definition at line 818 of file table_data.c.

References netsnmp_table_data_s::first_row, netsnmp_table_row_s::index_oid, netsnmp_table_row_s::index_oid_len, netsnmp_table_row_s::next, NULL, and snmp_oid_compare().

Referenced by netsnmp_table_data_get(), netsnmp_table_data_row_get(), and netsnmp_table_data_row_get_byoid().

  netsnmp_table_row* netsnmp_table_data_get_next_row (netsnmp_table_data * table, netsnmp_table_row * row)

returns the next row in the table

Definition at line 794 of file table_data.c.

References netsnmp_table_row_s::next, and NULL.

Referenced by netsnmp_table_data_row_next(), and netsnmp_table_data_set_get_next_row().

  void* netsnmp_table_data_remove_and_delete_row (netsnmp_table_data * table, netsnmp_table_row * row)

removes and frees a row of data to a given table and returns the void *

returns the void * data on successful deletion. or NULL on failure (bad arguments)

Definition at line 270 of file table_data.c.

References netsnmp_table_data_delete_row(), netsnmp_table_data_remove_row(), and NULL.

Referenced by netsnmp_table_data_remove_delete_row(), netsnmp_table_dataset_remove_and_delete_row(), and netsnmp_table_dataset_remove_row().

  netsnmp_table_row* netsnmp_table_data_remove_row (netsnmp_table_data * table, netsnmp_table_row * row)

removes a row of data to a given table and returns it (no free's called)

returns the row pointer itself on successful removing. or NULL on failure (bad arguments)

Definition at line 244 of file table_data.c.

References netsnmp_table_data_s::first_row, netsnmp_table_data_s::last_row, netsnmp_table_row_s::next, NULL, and netsnmp_table_row_s::prev.

Referenced by netsnmp_table_data_remove_and_delete_row(), and netsnmp_table_data_replace_row().

  NETSNMP_INLINE void netsnmp_table_data_replace_row (netsnmp_table_data * table, netsnmp_table_row * origrow, netsnmp_table_row * newrow)

swaps out origrow with newrow.

This does *not* delete/free anything!

Definition at line 229 of file table_data.c.

References netsnmp_table_data_add_row(), and netsnmp_table_data_remove_row().

Referenced by netsnmp_table_dataset_replace_row().