table.h

Introduction

Typedefs

struct netsnmp_column_info_t netsnmp_column_info

/**
@struct netsnmp_column_info_t
column info struct. OVERLAPPING RANGES ARE NOT SUPPORTED.
    */
typedef struct netsnmp_column_info_t { 
    char isRange; 
    /** only useful if isRange == 0 */
    char list_count;  
    union { 
        unsigned int range[2]; 
        unsigned int *list; 
        } details;  
    struct netsnmp_column_info_t *next;  
} netsnmp_column_info;  

Discussion

* Typedefs the netsnmp_column_info_t struct into netsnmp_column_info

struct netsnmp_table_registration_info_s netsnmp_table_registration_info

/**
@struct netsnmp_table_registration_info_s
Table registration structure.
    */
typedef struct netsnmp_table_registration_info_s { 
    /** list of varbinds with only 'type' set */
    netsnmp_variable_list *indexes; 
    /** calculated automatically */
    unsigned int number_indexes;  
    /**
the minimum columns number. If there are columns
in-between which are not valid, use valid_columns to get
automatic column range checking.
        */
    unsigned int min_column; 
    /** the maximum columns number */
    unsigned int max_column;  
    /** more details on columns */
    netsnmp_column_info *valid_columns;  
} netsnmp_table_registration_info;  

Discussion

Typedefs the netsnmp_table_registration_info_s struct into * netsnmp_table_registration_info

struct netsnmp_table_request_info_s netsnmp_table_request_info

/**
@struct netsnmp_table_request_info_s
The table request info structure.
    */
typedef struct netsnmp_table_request_info_s { 
    /** 0 if OID not long enough */
    unsigned int colnum; 
    /** 0 if failure to parse any */
    unsigned int number_indexes; 
    /** contents freed by helper upon exit */
    netsnmp_variable_list *indexes;  
    oid index_oid[MAX_OID_LEN]; 
    size_t index_oid_len; 
    netsnmp_table_registration_info *reg_info; 
} netsnmp_table_request_info;  

Discussion

Typedefs the netsnmp_table_request_info_s struct into * netsnmp_table_request_info

netsnmp_column_info

/**
@struct netsnmp_column_info_t
column info struct. OVERLAPPING RANGES ARE NOT SUPPORTED.
    */
typedef struct netsnmp_column_info_t { 
    char isRange; 
    /** only useful if isRange == 0 */
    char list_count;  
    union { 
        unsigned int range[2]; 
        unsigned int *list; 
        } details;  
    struct netsnmp_column_info_t *next;  
} netsnmp_column_info;  

Discussion

* Typedefs the netsnmp_column_info_t struct into netsnmp_column_info

netsnmp_table_registration_info

/**
@struct netsnmp_table_registration_info_s
Table registration structure.
    */
typedef struct netsnmp_table_registration_info_s { 
    /** list of varbinds with only 'type' set */
    netsnmp_variable_list *indexes; 
    /** calculated automatically */
    unsigned int number_indexes;  
    /**
the minimum columns number. If there are columns
in-between which are not valid, use valid_columns to get
automatic column range checking.
        */
    unsigned int min_column; 
    /** the maximum columns number */
    unsigned int max_column;  
    /** more details on columns */
    netsnmp_column_info *valid_columns;  
} netsnmp_table_registration_info;  

Discussion

Typedefs the netsnmp_table_registration_info_s struct into * netsnmp_table_registration_info

netsnmp_table_request_info

/**
@struct netsnmp_table_request_info_s
The table request info structure.
    */
typedef struct netsnmp_table_request_info_s { 
    /** 0 if OID not long enough */
    unsigned int colnum; 
    /** 0 if failure to parse any */
    unsigned int number_indexes; 
    /** contents freed by helper upon exit */
    netsnmp_variable_list *indexes;  
    oid index_oid[MAX_OID_LEN]; 
    size_t index_oid_len; 
    netsnmp_table_registration_info *reg_info; 
} netsnmp_table_request_info;  

Discussion

Typedefs the netsnmp_table_request_info_s struct into * netsnmp_table_request_info

#defines

/**
Notes:

1) illegal indexes automatically get handled for get/set cases.
Simply check to make sure the value is type ASN_NULL before
you answer a request.
    */
/**
used as an index to parent_data lookups 
    */
#define TABLE_HANDLER_NAME "table" 

Discussion

The table helper is designed to simplify the task of writing a table handler for the net-snmp agent. You should create a normal handler and register it using the netsnmp_register_table() function instead of the netsnmp_register_handler() function.