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/**
* This file implements the snmpSetSerialNo TestAndIncr counter
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-features.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
netsnmp_feature_require(watcher_spinlock)
#include "setSerialNo.h"
/*
* A watched spinlock can be fully implemented by the spinlock helper,
* but we still need a suitable variable to hold the value.
*/
static int setserialno;
/*
* TestAndIncr values should persist across agent restarts,
* so we need config handling routines to load and save the
* current value (incrementing this whenever it's loaded).
*/
static void
setserial_parse_config( const char *token, char *cptr )
{
setserialno = atoi(cptr);
setserialno++;
DEBUGMSGTL(("snmpSetSerialNo",
"Re-setting SnmpSetSerialNo to %d\n", setserialno));
}
static int
setserial_store_config( int a, int b, void *c, void *d )
{
char line[SNMP_MAXBUF_SMALL];
snprintf(line, SNMP_MAXBUF_SMALL, "setserialno %d", setserialno);
snmpd_store_config( line );
return 0;
}
void
init_setSerialNo(void)
{
oid set_serial_oid[] = { 1, 3, 6, 1, 6, 3, 1, 1, 6, 1 };
/*
* If we can't retain the TestAndIncr value across an agent restart,
* then it should be initialised to a pseudo-random value. So set it
* as such, before registering the config handlers to override this.
*/
#ifdef SVR4
setserialno = lrand48();
#else
setserialno = random();
#endif
DEBUGMSGTL(("snmpSetSerialNo",
"Initalizing SnmpSetSerialNo to %d\n", setserialno));
snmpd_register_config_handler("setserialno", setserial_parse_config,
NULL, "integer");
snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_STORE_DATA,
setserial_store_config, NULL);
/*
* Register 'setserialno' as a watched spinlock object
*/
#ifndef NETSNMP_NO_WRITE_SUPPORT
netsnmp_register_watched_spinlock(
netsnmp_create_handler_registration("snmpSetSerialNo", NULL,
set_serial_oid,
OID_LENGTH(set_serial_oid),
HANDLER_CAN_RWRITE),
&setserialno );
#else /* !NETSNMP_NO_WRITE_SUPPORT */
netsnmp_register_watched_spinlock(
netsnmp_create_handler_registration("snmpSetSerialNo", NULL,
set_serial_oid,
OID_LENGTH(set_serial_oid),
HANDLER_CAN_RONLY),
&setserialno );
#endif /* !NETSNMP_NO_WRITE_SUPPORT */
DEBUGMSGTL(("scalar_int", "Done initalizing example scalar int\n"));
}
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