After much tracking down I believe I narrowed the problem down to an
assumption of contiguous indices in table_data.c.
Any getnext request on the last row of a column followed by a gap would
produce nonsense. This patch seems to fix the problem:
--- table_data.c.orig Tue Oct 6 12:33:16 2009
+++ table_data.c Tue Oct 6 12:36:22 2009
@@ -529,7 +529,9 @@
}
}
if (!row) {
- table_info->colnum++;
+ table_info->colnum =
+ netsnmp_closest_column(table_info->colnum + 1,
+ table_reg_info->valid_columns);
if (table_info->colnum <= table_reg_info->max_column) {
row = table->first_row;
}
On Wed, 16 Sep 2009 16:50:08 -0400, Aaron Young <aaron.yo...@mpathix.com>
wrote:
> I've experienced an issue with 5.4.2.1 where my table has non-contiguous
> column ids, and both snmpwalk and snmptable seem to stop at the gap.
>
> i.e. (column ids 2,3,10)
>
> snmptable -v2c -Ci -c public localhost:1616 mxOtherTable
> SNMP table: MPATHIX-MIB::mxOtherTable
>
> index mxOtherIdentity mxOtherState mxOtherErrorMsg
> 1 Joe's Chicken and Waffles ok ?
> 2 Sal's donut shoppe ok ?
>
> If I use snmptable in GETNEXT or v1 mode it works fine.
>
> An snmpwalk on the table oid will also stop at the gap:
>
> snmpwalk -v2c -Ci -c public localhost:1616 mxOtherTable
> MPATHIX-MIB::mxOtherTable = No Such Object available on this agent at
> this
> OID
> MPATHIX-MIB::mxOtherIdentity.1 = STRING: Joe's Chicken and Waffles
> MPATHIX-MIB::mxOtherIdentity.2 = STRING: Sal's donut shoppe
> MPATHIX-MIB::mxOtherState.1 = INTEGER: ok(1)
> MPATHIX-MIB::mxOtherState.2 = INTEGER: ok(1)
>
> This is in Solaris x86 built in 64-bit mode, communicating with snmpd
> through agentx
>
> Here's how I built my table:
>
>
> static oid tableOid[] = { 1, 3, 6, 1, 4, 1, 8276, 1, 2, 1, 6 };
>
> int defaultState = 1;
>
> std::string tableName = "mxOtherTable";
> static netsnmp_table_data_set* table
> = netsnmp_create_table_data_set( tableName.c_str() );
>
> // disallow SET
> table->allow_creation = 0;
>
> // add index
> netsnmp_table_dataset_add_index( table, ASN_INTEGER );
>
> // add columns
> // column #
> // type
> // writable
> // default value
> // default value len
>
> netsnmp_table_set_multi_add_default_row( table,
> 2, ASN_OCTET_STR, 0, NULL, 0,
> 3, ASN_INTEGER, 0, &defaultState, sizeof( defaultState ),
> 20, ASN_OCTET_STR, 0, NULL, 0,
> 0 );
>
> netsnmp_handler_registration* regInfo
> = netsnmp_create_handler_registration
> ( tableName.c_str(), NULL,
> tableOid, OID_LENGTH(tableOid),
> HANDLER_CAN_RWRITE );
>
> netsnmp_register_table_data_set( regInfo, table, NULL);
>
> netsnmp_register_auto_data_table( table, NULL );
>
>
> // add
> netsnmp_table_row* newRow = netsnmp_create_table_data_row();
>
> int index = 1;
> netsnmp_table_row_add_index( newRow, ASN_INTEGER,
> &index, sizeof( index ) );
>
> std::string identity = "Joe's Chicken and Waffles";
> netsnmp_set_row_column (newRow, 2, ASN_OCTET_STR,
> identity.c_str(), identity.length() );
>
> netsnmp_set_row_column (newRow, 3, ASN_INTEGER,
> reinterpret_cast<const char*>(&defaultState), sizeof(
> defaultState ) );
>
> std::string errorMsg = "Waffle-lite";
> netsnmp_set_row_column (newRow, 20, ASN_OCTET_STR,
> errorMsg.c_str(), errorMsg.length() );
>
> netsnmp_table_dataset_add_row( table, newRow );
>
> // add
> netsnmp_table_row* newRow2 = netsnmp_create_table_data_row();
>
> index++;
> netsnmp_table_row_add_index( newRow2, ASN_INTEGER,
> &index, sizeof( index ) );
>
> identity = "Sal's donut shoppe";
> netsnmp_set_row_column (newRow2, 2, ASN_OCTET_STR,
> identity.c_str(), identity.length() );
>
> netsnmp_set_row_column (newRow2, 3, ASN_INTEGER,
> reinterpret_cast<const char*>(&defaultState), sizeof(
> defaultState ) );
>
> errorMsg = "full of donuts";
> netsnmp_set_row_column (newRow2, 20, ASN_OCTET_STR,
> errorMsg.c_str(), errorMsg.length() );
>
> netsnmp_table_dataset_add_row( table, newRow2 );
>
>
> Any ideas on what the problem may be?
>
> -Aaron
>
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