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/*
* Note: this file originally auto-generated by mib2c using
* : mib2c.scalar.conf,v 1.9 2005/01/07 09:37:18 dts12 Exp $
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include <net-snmp/agent/hardware/memory.h>
#include "memory.h"
#define DEFAULTMINIMUMSWAP 16000 /* kilobytes */
int memory_object_index;
int minimum_swap;
/** Initializes the memory module */
void
init_memory(void)
{
static oid memory_oid[] = { 1, 3, 6, 1, 4, 1, 2021, 4 };
static oid memSwapError_oid[] = { 1, 3, 6, 1, 4, 1, 2021, 4, 100 };
static oid memSwapErrMsg_oid[] = { 1, 3, 6, 1, 4, 1, 2021, 4, 101 };
DEBUGMSGTL(("memory", "Initializing\n"));
memory_object_index = OID_LENGTH(memory_oid);
netsnmp_register_scalar_group(
netsnmp_create_handler_registration("memory", handle_memory,
memory_oid, memory_object_index,
HANDLER_CAN_RONLY),
1, 17);
netsnmp_register_scalar(
netsnmp_create_handler_registration("memSwapError", handle_memory,
memSwapError_oid, memory_object_index+1,
HANDLER_CAN_RONLY));
netsnmp_register_scalar(
netsnmp_create_handler_registration("memSwapErrMsg", handle_memory,
memSwapErrMsg_oid, memory_object_index+1,
HANDLER_CAN_RONLY));
snmpd_register_config_handler("swap", memory_parse_config,
memory_free_config, "min-avail");
}
void
memory_parse_config(const char *token, char *cptr)
{
minimum_swap = atoi(cptr);
}
void
memory_free_config(void)
{
minimum_swap = DEFAULTMINIMUMSWAP;
}
int
handle_memory(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
netsnmp_memory_info *mem_info;
int val;
char buf[1024];
/*
* We just need to handle valid GET requests, as invalid instances
* are rejected automatically, and (valid) GETNEXT requests are
* converted into the appropriate GET request.
*
* We also only ever receive one request at a time.
*/
switch (reqinfo->mode) {
case MODE_GET:
netsnmp_memory_load();
switch (requests->requestvb->name[ memory_object_index ]) {
case MEMORY_INDEX:
val = 0;
break;
case MEMORY_ERRNAME:
sprintf(buf, "swap");
snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR,
(u_char *)buf, strlen(buf));
return SNMP_ERR_NOERROR;
case MEMORY_SWAP_TOTAL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_SWAP, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->size; /* swaptotal */
val *= (mem_info->units/1024);
break;
case MEMORY_SWAP_AVAIL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_SWAP, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->free; /* swapfree */
val *= (mem_info->units/1024);
break;
case MEMORY_REAL_TOTAL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_PHYSMEM, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->size; /* memtotal */
val *= (mem_info->units/1024);
break;
case MEMORY_REAL_AVAIL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_PHYSMEM, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->free; /* memfree */
val *= (mem_info->units/1024);
break;
case MEMORY_STXT_TOTAL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_STEXT, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->size;
val *= (mem_info->units/1024);
break;
case MEMORY_STXT_AVAIL: /* Deprecated */
case MEMORY_STXT_USED:
/*
* The original MIB description of memAvailSwapTXT
* was inconsistent with that implied by the name.
* Retain the actual behaviour for the (sole)
* implementation of this object, but deprecate it in
* favour of a more consistently named replacement object.
*/
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_STEXT, 0 );
if (!mem_info)
goto NOSUCH;
val = (mem_info->size - mem_info->free);
val *= (mem_info->units/1024);
break;
case MEMORY_RTXT_TOTAL:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_RTEXT, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->size;
val *= (mem_info->units/1024);
break;
case MEMORY_RTXT_AVAIL: /* Deprecated */
case MEMORY_RTXT_USED:
/*
* The original MIB description of memAvailRealTXT
* was inconsistent with that implied by the name.
* Retain the actual behaviour for the (sole)
* implementation of this object, but deprecate it in
* favour of a more consistently named replacement object.
*/
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_RTEXT, 0 );
if (!mem_info)
goto NOSUCH;
val = (mem_info->size - mem_info->free);
val *= (mem_info->units/1024);
break;
case MEMORY_FREE:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_VIRTMEM, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->free; /* memfree + swapfree */
val *= (mem_info->units/1024);
break;
case MEMORY_SWAP_MIN:
val = minimum_swap;
break;
case MEMORY_SHARED:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_SHARED, 0 );
if (!mem_info)
goto NOSUCH;
val = mem_info->size; /* memshared */
val *= (mem_info->units/1024);
break;
case MEMORY_BUFFER:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_MBUF, 0 );
if (!mem_info || mem_info->size == -1)
goto NOSUCH;
val = (mem_info->size - mem_info->free); /* buffers */
val *= (mem_info->units/1024);
break;
case MEMORY_CACHED:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_CACHED, 0 );
if (!mem_info || mem_info->size== -1)
goto NOSUCH;
val = (mem_info->size - mem_info->free); /* cached */
val *= (mem_info->units/1024);
break;
case MEMORY_SWAP_ERROR:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_SWAP, 0 );
if (!mem_info)
goto NOSUCH;
val = ((mem_info->units / 1024) * mem_info->free > minimum_swap) ? 0 : 1;
break;
case MEMORY_SWAP_ERRMSG:
mem_info = netsnmp_memory_get_byIdx( NETSNMP_MEM_TYPE_SWAP, 0 );
if (!mem_info)
goto NOSUCH;
if ((mem_info->units / 1024) * mem_info->free > minimum_swap)
buf[0] = 0;
else
sprintf(buf, "Running out of swap space (%ld)", mem_info->free);
snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR,
(u_char *)buf, strlen(buf));
return SNMP_ERR_NOERROR;
default:
snmp_log(LOG_ERR, "unknown object (%lu) in handle_memory\n",
requests->requestvb->name[ memory_object_index ]);
NOSUCH:
netsnmp_set_request_error( reqinfo, requests, SNMP_NOSUCHOBJECT );
return SNMP_ERR_NOERROR;
}
/*
* All non-integer objects (and errors) have already been
* processed. So return the integer value.
*/
snmp_set_var_typed_value(requests->requestvb, ASN_INTEGER,
(u_char *)&val, sizeof(val));
break;
default:
/*
* we should never get here, so this is a really bad error
*/
snmp_log(LOG_ERR, "unknown mode (%d) in handle_memory\n",
reqinfo->mode);
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
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