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#include "usuals.h"
#include <sys/queue.h>
#include <sys/select.h>
#include <syslog.h>
#include <unistd.h>
#include <bsnmp/snmpmod.h>
#include "regex_tree.h"
#include "regex_oid.h"
/* our module handle */
static struct lmodule *module;
/* OIDs */
static const struct asn_oid oid_regex = OIDX_regexData;
/* the Object Resource registration index */
static u_int reg_index;
struct data_entry {
uint32_t index;
TAILQ_ENTRY(data_entry) link;
char *descr;
uint64_t last_update;
uint64_t value;
};
TAILQ_HEAD(data_entry_list, data_entry);
/* list of peers */
static struct data_entry_list entries = TAILQ_HEAD_INITIALIZER(entries);
static uint32_t entry_count = 0;
/* the initialisation function */
static int
module_init(struct lmodule *mod, int argc, char *argv[])
{
module = mod;
if (argc != 0) {
syslog(LOG_ERR, "bad number of arguments for %s", __func__);
return (EINVAL);
}
return 0;
}
/* Module is started */
static void
module_start(void)
{
reg_index = or_register(&oid_regex, "The MIB for regex data.", module);
}
/* Called, when the module is to be unloaded after it was successfully loaded */
static int
module_fini(void)
{
or_unregister(reg_index);
return 0;
}
const struct snmp_module config = {
.comment = "This module implements SNMP listing of data from regular expressions",
.init = module_init,
.start = module_start,
.fini = module_fini,
.tree = regex_ctree,
.tree_size = regex_CTREE_SIZE,
};
/* System variables - read-only scalars only. */
int
op_data (struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
switch (op) {
case SNMP_OP_GET:
break;
case SNMP_OP_SET:
return SNMP_ERR_NOT_WRITEABLE;
default:
ASSERT(0);
break;
}
switch (which) {
case LEAF_dataCount:
value->v.integer = entry_count;
break;
default:
ASSERT(0);
break;
}
return SNMP_ERR_NOERROR;
}
int
op_dataentry (struct snmp_context *ctx, struct snmp_value *value,
u_int sub, u_int iidx, enum snmp_op op)
{
asn_subid_t which = value->var.subs[sub - 1];
struct data_entry *data;
switch (op) {
case SNMP_OP_GETNEXT:
data = NEXT_OBJECT_INT (&entries, &value->var, sub);
if (data == NULL)
return SNMP_ERR_NOSUCHNAME;
value->var.len = sub + 1;
value->var.subs[sub] = data->index;
break;
case SNMP_OP_GET:
data = FIND_OBJECT_INT (&entries, &value->var, sub);
if (data == NULL)
return SNMP_ERR_NOSUCHNAME;
break;
case SNMP_OP_SET:
if (index_decode (&value->var, sub, iidx, &data))
return SNMP_ERR_NO_CREATION;
data = FIND_OBJECT_INT (&entries, &value->var, sub);
if (data != NULL)
return SNMP_ERR_NOT_WRITEABLE;
return SNMP_ERR_NO_CREATION;
default:
ASSERT(0);
break;
}
switch (which) {
case LEAF_dataIndex:
value->v.integer = data->index;
break;
case LEAF_dataDescr:
return (string_get (value, data->descr, -1));
case LEAF_dataLast:
value->v.uint32 = data->last_update;
break;
case LEAF_dataValue:
value->v.uint32 = data->value;
break;
default:
ASSERT(0);
break;
};
return SNMP_ERR_NOERROR;
}
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