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/*
* Host Resources MIB - proc processor group implementation - hr_proc.c
*
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#if HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#include <ctype.h>
#include "host_res.h"
#include "hr_proc.h"
#include <net-snmp/agent/auto_nlist.h>
#include <net-snmp/agent/agent_read_config.h>
#include <net-snmp/agent/hardware/cpu.h>
#include "ucd-snmp/loadave.h"
#define HRPROC_MONOTONICALLY_INCREASING
/*********************
*
* Kernel & interface information,
* and internal forward declarations
*
*********************/
extern void Init_HR_Proc(void);
extern int Get_Next_HR_Proc(void);
const char *describe_proc(int);
int proc_status(int);
int header_hrproc(struct variable *, oid *, size_t *, int,
size_t *, WriteMethod **);
/*********************
*
* Initialisation & common implementation functions
*
*********************/
netsnmp_cpu_info *HRP_cpu;
#define HRPROC_ID 1
#define HRPROC_LOAD 2
struct variable4 hrproc_variables[] = {
{HRPROC_ID, ASN_OBJECT_ID, RONLY, var_hrproc, 2, {1, 1}},
{HRPROC_LOAD, ASN_INTEGER, RONLY, var_hrproc, 2, {1, 2}}
};
oid hrproc_variables_oid[] = { 1, 3, 6, 1, 2, 1, 25, 3, 3 };
void
init_hr_proc(void)
{
init_device[HRDEV_PROC] = Init_HR_Proc;
next_device[HRDEV_PROC] = Get_Next_HR_Proc;
device_descr[HRDEV_PROC] = describe_proc;
device_status[HRDEV_PROC] = proc_status;
#ifdef HRPROC_MONOTONICALLY_INCREASING
dev_idx_inc[HRDEV_PROC] = 1;
#endif
REGISTER_MIB("host/hr_proc", hrproc_variables, variable4,
hrproc_variables_oid);
}
/*
* header_hrproc(...
* Arguments:
* vp IN - pointer to variable entry that points here
* name IN/OUT - IN/name requested, OUT/name found
* length IN/OUT - length of IN/OUT oid's
* exact IN - TRUE if an exact match was requested
* var_len OUT - length of variable or 0 if function returned
* write_method
*
*/
int
header_hrproc(struct variable *vp,
oid * name,
size_t * length,
int exact, size_t * var_len, WriteMethod ** write_method)
{
#define HRPROC_ENTRY_NAME_LENGTH 11
oid newname[MAX_OID_LEN];
int proc_idx, LowIndex = -1;
int result;
DEBUGMSGTL(("host/hr_proc", "var_hrproc: "));
DEBUGMSGOID(("host/hr_proc", name, *length));
DEBUGMSG(("host/hr_proc", " %d\n", exact));
memcpy((char *) newname, (char *) vp->name, vp->namelen * sizeof(oid));
/*
* Find "next" proc entry
*/
Init_HR_Proc();
for (;;) {
proc_idx = Get_Next_HR_Proc();
if (proc_idx == -1)
break;
newname[HRPROC_ENTRY_NAME_LENGTH] = proc_idx;
result = snmp_oid_compare(name, *length, newname, vp->namelen + 1);
if (exact && (result == 0)) {
LowIndex = proc_idx;
/*
* Save processor status information
*/
break;
}
if ((!exact && (result < 0)) &&
(LowIndex == -1 || proc_idx < LowIndex)) {
LowIndex = proc_idx;
/*
* Save processor status information
*/
#ifdef HRPROC_MONOTONICALLY_INCREASING
break;
#endif
}
}
if (LowIndex == -1) {
DEBUGMSGTL(("host/hr_proc", "... index out of range\n"));
return (MATCH_FAILED);
}
memcpy((char *) name, (char *) newname,
(vp->namelen + 1) * sizeof(oid));
*length = vp->namelen + 1;
*write_method = 0;
*var_len = sizeof(long); /* default to 'long' results */
DEBUGMSGTL(("host/hr_proc", "... get proc stats "));
DEBUGMSGOID(("host/hr_proc", name, *length));
DEBUGMSG(("host/hr_proc", "\n"));
return LowIndex;
}
/*********************
*
* System specific implementation functions
*
*********************/
u_char *
var_hrproc(struct variable * vp,
oid * name,
size_t * length,
int exact, size_t * var_len, WriteMethod ** write_method)
{
int proc_idx;
netsnmp_cpu_info *cpu;
proc_idx =
header_hrproc(vp, name, length, exact, var_len, write_method);
if (proc_idx == MATCH_FAILED)
return NULL;
switch (vp->magic) {
case HRPROC_ID:
*var_len = nullOidLen;
return (u_char *) nullOid;
case HRPROC_LOAD:
cpu = netsnmp_cpu_get_byIdx( proc_idx & HRDEV_TYPE_MASK, 0 );
if ( !cpu || !cpu->history || !cpu->history[0].total_hist ||
( cpu->history[0].total_hist == cpu->total_ticks ))
return NULL;
long_return = (cpu->idle_ticks - cpu->history[0].idle_hist)*100;
if (cpu->total_ticks > cpu->history[0].total_hist) /* avoid div. by 0 */
long_return /= (cpu->total_ticks - cpu->history[0].total_hist);
else
long_return = 0;
long_return = 100 - long_return;
if (long_return < 0)
long_return = 0;
return (u_char *) & long_return;
default:
DEBUGMSGTL(("host/hr_proc", "unknown sub-id %d in var_hrproc\n",
vp->magic));
}
return NULL;
}
/*********************
*
* Internal implementation functions
*
*********************/
void
Init_HR_Proc(void)
{
HRP_cpu = netsnmp_cpu_get_first(); /* 'Overall' entry */
}
int
Get_Next_HR_Proc(void)
{
HRP_cpu = netsnmp_cpu_get_next( HRP_cpu );
if ( HRP_cpu )
return (HRDEV_PROC << HRDEV_TYPE_SHIFT) + HRP_cpu->idx;
else
return -1;
}
const char *
describe_proc(int idx)
{
netsnmp_cpu_info *cpu = netsnmp_cpu_get_byIdx( idx & HRDEV_TYPE_MASK, 0 );
return (cpu ? cpu->descr : NULL );
}
int
proc_status(int idx)
{
netsnmp_cpu_info *cpu = netsnmp_cpu_get_byIdx( idx & HRDEV_TYPE_MASK, 0 );
return (cpu ? cpu->status : 0 );
}
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