Hello,
I am working on creating a system for monitoring temperature and
humidity in server rooms based on the raspberry pi.
I am using NET-SNMP to send the data over the network to various
monitoring tools.
My Question is how do I create rows and columns using pointers to a
variable?
I have this so far:
void
initialize_table_semsSensorTable(void)
{
const oid semsSensorTable_oid[] = {1,3,6,1,4,1,40790,1,1,1,1};
netsnmp_table_data_set *table_set;
netsnmp_table_row *row;
/* create the table structure itself */
table_set = netsnmp_create_table_data_set("semsSensorTable");
/* comment this out or delete if you don't support creation of new
rows */
table_set->allow_creation = 1;
/***************************************************
* Adding indexes */
DEBUGMSGTL(("initialize_table_semsSensorTable",
"adding indexes to table semsSensorTable\n"));
netsnmp_table_set_add_indexes(table_set,
ASN_UNSIGNED, /* index: semsSensorPortNbr */
0);
DEBUGMSGTL(("initialize_table_semsSensorTable",
"adding column types to table semsSensorTable\n"));
netsnmp_table_set_multi_add_default_row(table_set,
COLUMN_SEMSSENSORPORTNBR,
ASN_UNSIGNED, 0,
NULL, 0,
COLUMN_SEMSSENSORSTAUTS,
ASN_INTEGER, 0,
NULL, 0,
COLUMN_SEMSSENSORTYPE,
ASN_INTEGER, 0,
NULL, 0,
COLUMN_SEMSSENSORDATA,
ASN_OCTET_STR, 0,
NULL, 0,
COLUMN_SEMSSENSORLOC,
ASN_OCTET_STR, 1,
NULL, 0,
0);
/* registering the table with the master agent */
/* note: if you don't need a subhandler to deal with any aspects
of the request, change semsSensorTable_handler to "NULL" */
netsnmp_register_table_data_set(netsnmp_create_handler_registration("semsSensorTable",
semsSensorTable_handler,
semsSensorTable_oid,
OID_LENGTH(semsSensorTable_oid),
HANDLER_CAN_RWRITE),
table_set, NULL);
for (indx = 0; indx < 8; indx++){
sensorTable t = {0,0,0,NULL,NULL};
t.port = indx+1;
sensors[indx] = &t;
row = netsnmp_create_table_data_row();
netsnmp_table_row_add_index(row,ASN_UNSIGNED,&indx,sizeof(indx));
netsnmp_set_row_column(row, 1,
ASN_INTEGER,&sensors[indx]->status,sizeof(sensors[indx]->status));
netsnmp_mark_row_column_writable(row, 1, 0); // make
writable via SETs
netsnmp_table_dataset_add_row(table_set, row);
}
netsnmp_register_auto_data_table(table_set, NULL);
}
>From what i Observed it reported that I had to many columns when I did:
snmptable -v 2c -m + -c sems.inforelay localhost SST-SEMS::semsSensorTable
The MIBS can be downloaded @
https://github.com/atmega168/SEMS/tree/master/mibs
I really appreciate any help I can get on this.
Regards,
David Goldberg
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