hello, everyone,
i tried to accomplish my c file which is generated by mib2c with the
mib2c.iterate.conf template. see the following code, the red part is what i
added. i tried to intialize the table with 2 rows, each of them has Index,
Name and Status, 3 elements. Everything seems ok, i compiled it into a
dynamic library(.so), and loaded the library in my agent, but when i used
snmpwalk, i got this :
xxxNetInterfaceIndex.0 = INTEGER: 0
xxxNetInterfaceIndex.1 = INTEGER: 1
xxxNetInterfaceName.0 = STRING:
xxxNetInterfaceName.1 = STRING:
xxxNetInterfaceStatus.0 = INTEGER: deactivated(0)
xxxNetInterfaceStatus.1 = INTEGER: deactivated(0)
The variable Name is empty. Did i miss anything in my program?
Thanks in advance.
Yi
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "xxxMIB.h"
/** Initializes the xxxMIB module */
void
init_xxxMIB(void)
{
/* here we initialize all the tables we're planning on supporting */
initialize_table_xxxNetInterfaceTable();
}
// # Determine the first/last column names
long status=0;
void
fill_xxxNetInterfaceTable(void);
/** Initialize the xxxNetInterfaceTable table by defining its contents and
how
it's structured */
void
initialize_table_xxxNetInterfaceTable(void)
{
static oid xxxNetInterfaceTable_oid[] = {1,3,6,1,3,10,166,2,1};
size_t xxxNetInterfaceTable_oid_len =
OID_LENGTH(xxxNetInterfaceTable_oid);
netsnmp_handler_registration *reg;
netsnmp_iterator_info *iinfo;
netsnmp_table_registration_info *table_info;
reg = netsnmp_create_handler_registration(
"xxxNetInterfaceTable", xxxNetInterfaceTable_handler,
xxxNetInterfaceTable_oid, xxxNetInterfaceTable_oid_len,
HANDLER_CAN_RONLY
);
table_info = SNMP_MALLOC_TYPEDEF( netsnmp_table_registration_info );
netsnmp_table_helper_add_indexes(table_info,
ASN_INTEGER, /* index: xxxNetInterfaceIndex */
0);
table_info->min_column = COLUMN_XXXNETINTERFACEINDEX;
table_info->max_column = COLUMN_XXXNETINTERFACESTATUS;
iinfo = SNMP_MALLOC_TYPEDEF( netsnmp_iterator_info );
iinfo->get_first_data_point = xxxNetInterfaceTable_get_first_data_point;
iinfo->get_next_data_point = xxxNetInterfaceTable_get_next_data_point;
iinfo->table_reginfo = table_info;
netsnmp_register_table_iterator( reg, iinfo );
/* Initialise the contents of the table here */
fill_xxxNetInterfaceTable();
}
/* Typical data structure for a row entry */
struct xxxNetInterfaceTable_entry {
/* Index values */
long xxxNetInterfaceIndex;
/* Column values */
//long xxxNetInterfaceIndex;
char xxxNetInterfaceName[64];
size_t xxxNetInterfaceName_len;
long xxxNetInterfaceStatus;
/* Illustrate using a simple linked list */
int valid;
struct xxxNetInterfaceTable_entry *next;
};
struct xxxNetInterfaceTable_entry *xxxNetInterfaceTable_head;
/* create a new row in the (unsorted) table */
struct xxxNetInterfaceTable_entry *
xxxNetInterfaceTable_createEntry(
long xxxNetInterfaceIndex
) {
struct xxxNetInterfaceTable_entry *entry;
entry = SNMP_MALLOC_TYPEDEF(struct xxxNetInterfaceTable_entry);
if (!entry)
return NULL;
entry->xxxNetInterfaceIndex = xxxNetInterfaceIndex;
entry->next = xxxNetInterfaceTable_head;
xxxNetInterfaceTable_head = entry;
return entry;
}
/* remove a row from the table */
void
xxxNetInterfaceTable_removeEntry( struct xxxNetInterfaceTable_entry *entry )
{
struct xxxNetInterfaceTable_entry *ptr, *prev;
if (!entry)
return; /* Nothing to remove */
for ( ptr = xxxNetInterfaceTable_head, prev = NULL;
ptr != NULL;
prev = ptr, ptr = ptr->next ) {
if ( ptr == entry )
break;
}
if ( !ptr )
return; /* Can't find it */
if ( prev == NULL )
xxxNetInterfaceTable_head = ptr->next;
else
prev->next = ptr->next;
SNMP_FREE( entry ); /* XXX - release any other internal resources */
}
void
fill_xxxNetInterfaceTable(void)
{
struct xxxNetInterfaceTable_entry *entry;
entry = SNMP_MALLOC_TYPEDEF(struct xxxNetInterfaceTable_entry);
char* strName = "Ethernet";
size_t len = strlen("Ethernet");
entry = xxxNetInterfaceTable_createEntry(0);
memcpy(entry->xxxNetInterfaceName, strName, len);
entry->xxxNetInterfaceStatus = 0;
char* strName = "RTC Interface";
size_t len = strlen("RTC Interface");
entry = xxxNetInterfaceTable_createEntry(1);
memcpy(entry->xxxNetInterfaceName,, strlen("RTC Interface")+1);
entry->xxxNetInterfaceStatus = 0;
}
/* Example iterator hook routines - using 'get_next' to do most of the work
*/
netsnmp_variable_list *
xxxNetInterfaceTable_get_first_data_point(void **my_loop_context,
void **my_data_context,
netsnmp_variable_list *put_index_data,
netsnmp_iterator_info *mydata)
{
*my_loop_context = xxxNetInterfaceTable_head;
return xxxNetInterfaceTable_get_next_data_point(my_loop_context,
my_data_co
ntext,
put_index_data, mydata );
}
netsnmp_variable_list *
xxxNetInterfaceTable_get_next_data_point(void **my_loop_context,
void **my_data_context,
netsnmp_variable_list *put_index_data,
netsnmp_iterator_info *mydata)
{
struct xxxNetInterfaceTable_entry *entry = (struct
xxxNetInterfaceTable_en
try *)*my_loop_context;
netsnmp_variable_list *idx = put_index_data;
if ( entry ) {
snmp_set_var_typed_integer( idx, ASN_INTEGER,
entry->xxxNetInterfaceInd
ex );
idx = idx->next_variable;
*my_data_context = (void *)entry;
*my_loop_context = (void *)entry->next;
return put_index_data;
} else {
return NULL;
}
}
/** handles requests for the xxxNetInterfaceTable table */
int
xxxNetInterfaceTable_handler(
netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests) {
netsnmp_request_info *request;
netsnmp_table_request_info *table_info;
struct xxxNetInterfaceTable_entry *table_entry;
switch (reqinfo->mode) {
/*
* Read-support (also covers GetNext requests)
*/
case MODE_GET:
for (request=requests; request; request=request->next) {
table_entry = (struct xxxNetInterfaceTable_entry *)
netsnmp_extract_iterator_context(request);
table_info = netsnmp_extract_table_info( request);
switch (table_info->colnum) {
case COLUMN_XXXNETINTERFACEINDEX:
...
break;
case COLUMN_XXXNETINTERFACENAME:
if ( !table_entry ) {
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHINSTANCE);
continue;
}
snmp_set_var_typed_value( request->requestvb, ASN_OCTET_STR,
(u_char*)table_entry->xxxNetInterfaceName,
table_entry->xxxNetInterfaceName_len);
break;
case COLUMN_XXXNETINTERFACESTATUS:
...
break;
default:
netsnmp_set_request_error(reqinfo, request,
SNMP_NOSUCHOBJECT);
break;
}
}
break;
}
return SNMP_ERR_NOERROR;
}
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