First, you shouldn’t be adding things to MIB-2, it is standards controlled. If 
you want to add a MIB branch, you should do it under the enterprise branch 
(1.3.6.1.4.1).  You’ll need a private enterprise number, which are controlled 
by the IANA: https://www.iana.org/assignments/enterprise-numbers/

You might be able to use the experimental branch 
(http://oid-info.com/get/1.3.6.1.3).  I’m not sure what’s involved in avoiding 
collisions on that branch.

There might be other branches or subbranches that are appropriate that I’m not 
aware of.

Regards,
Brian

From: bps tech <bpstec...@gmail.com>
Sent: Friday, November 8, 2024 11:50 AM
To: net-snmp-users@lists.sourceforge.net
Subject: netsnmp_register_table_iterator() failing

You don't often get email from bpstec...@gmail.com<mailto:bpstec...@gmail.com>. 
Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>

EXTERNAL EMAIL - USE CAUTION when clicking links or attachments


Hi,

I am writing my first code for SNMP. I am trying to extend the MIB-2 standard 
interface table. During this process table iterator registration function    
netsnmp_register_table_iterator(reg, iinfo)   is failing.

Here is my code:

void init_myCustomIfTable(void) {

    static oid ifTable_oid[] = {1, 3, 6, 1, 2, 1, 2, 99};  // Base OID for 
custom table extension

    size_t ifTable_oid_len = OID_LENGTH(ifTable_oid);



    netsnmp_handler_registration *reg;

    netsnmp_table_registration_info *table_info;

    netsnmp_iterator_info *iinfo;



    AIM_LOG_INFO("init_myCustomIfTable \n");

    // Register the table with the SNMP agent

    reg = netsnmp_create_handler_registration("myCustomIfTable",

                                              get_custom_metric_data, 
ifTable_oid,

                                              ifTable_oid_len,

                                              HANDLER_CAN_RONLY);



    // Error checking for handler registration

    if (!reg) {



        AIM_LOG_INFO("Failed to create handler registration for myCustomIfTable 
\n");

        return;

    }



    // Define table structure and columns (e.g., index for ifIndex and custom 
metrics)

    table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);

    if (!table_info) {

        AIM_LOG_INFO("Failed to allocate memory for table registration info 
\n");

        return;

    }



    netsnmp_table_helper_add_index(table_info, ASN_INTEGER, 0);  // Index for 
ifIndex

    table_info->min_column = COLUMN_CUSTOM_METRIC1;           // Starting 
column for custom data

    table_info->max_column = COLUMN_CUSTOM_METRIC2;           // Ending column 
for custom data



    // Define iterator information for table walking

    iinfo = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);

    if (!iinfo) {

        AIM_LOG_INFO("Failed to allocate memory for iterator info \n");

        free(table_info);  // Free memory before returning

        return;

    }

iinfo->get_first_data_point = get_first_data_point;

    iinfo->get_next_data_point = get_next_data_point;

    iinfo->table_reginfo = table_info;



    // Register the table iterator handler

    if (!netsnmp_register_table_iterator(reg, iinfo)) {

        AIM_LOG_INFO("Failed to register table iterator handler for 
myCustomIfTable \n");

        free(iinfo);  // Clean up allocated memory

        free(table_info);  // Clean up allocated memory

        return;

    }

I am attaching my MIB file also.

Any help in this regard would be highly appreciated.

Thanks & Regards,
Bhashkar
_______________________________________________
Net-snmp-users mailing list
Net-snmp-users@lists.sourceforge.net
Please see the following page to unsubscribe or change other options:
https://lists.sourceforge.net/lists/listinfo/net-snmp-users

Reply via email to