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/*
* mib_example.c --
*
* This file contains a sample skeletion for adding mib modules to
* the snmp agent.
*
* Copyright (c) 1997
*
* Erik Schoenfelder TU Braunschweig, Germany
*
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of CMU not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*
*/
#include "mib_module.h"
/*
* The HAVE_EXAMPLE define is per default commented in the Makefile[.in]
* files.
* it is used in this file andin mib_module.h.
*
* note: HAVE_EXAMPLE must be defined to make this example work.
*/
#ifdef HAVE_EXAMPLE
#include <stdio.h>
#include <string.h>
#include <malloc.h>
/*
* Definitions of tags that are used internally to read/write the
* selected object type. These tags should be unique.
*/
#define EXAMP_VERSION 1
#define EXAMP_DESCR 2
/*
* our mib objects and the handler:
*/
static u_char *var_examp();
static struct variable examp_variables[] = {
/*
* +-- our unique tag (see above)
* |
* | +--- type
* | |
* | | +--- access
* | | |
* | | | +--- the handler (see below)
* | | | |
* | | | | +--- length of the oids following
* | | | | |
* | | | | | +--- the oid relative to the
* | | | | | | base (see below)
* v v v v v v
*/
{EXAMP_VERSION, INTEGER, RONLY, var_examp, 2, {1, 1}},
{EXAMP_DESCR, STRING, RONLY, var_examp, 2, {1, 2}}
};
/*
* our mib base:
*
* to walk along the example, you may run:
* % snmpwalk localhost public .1.3.6.1.3.4711
*
*/
#define INTERNET_EXPERIMENTAL 1, 3, 6, 1, 3
static oid id_base [] = { INTERNET_EXPERIMENTAL, 4711 };
/*
* initialize and register example-mib:
* (this function is called from mib_module.c
* and declared to be external in mib_module.h)
*/
void
examp_init()
{
/* cmu snmp agent example mib addon: */
mib_register (id_base, sizeof(id_base) / sizeof(oid),
examp_variables,
sizeof(examp_variables)/sizeof(*examp_variables),
sizeof(*examp_variables));
}
/*
* entry for the example mib:
*/
static u_char *
var_examp(vp, name, length, exact, var_len, write_method)
struct variable *vp; /* IN - ptr to variable entry that points here */
oid *name; /* IN/OUT - input name req, output name found */
int *length; /* IN/OUT - length of input and output oid's */
int exact; /* IN - TRUE if an exact match was requested. */
int *var_len; /* OUT - length of var or 0 if function ret. */
int (**write_method)(); /* OUT - ptr to func to set var, else 0 */
{
oid newname[MAX_NAME_LEN];
int result;
/*
* check given oid to be exact or valid; for the
* example: 1.3.6.1.3.4711.1.x with 1 <= x <= 2 (and instance .0)
*/
bcopy((char *)vp->name, (char *)newname, (int)vp->namelen * sizeof(oid));
newname[8] = 0;
result = compare(name, *length, newname, (int)vp->namelen + 1);
if ((exact && (result != 0)) || (!exact && (result >= 0)))
return NULL;
bcopy((char *)newname, (char *)name, ((int)vp->namelen + 1) * sizeof(oid));
*length = vp->namelen + 1;
*write_method = 0;
switch (vp->magic){
case EXAMP_VERSION:
{ static long long_return = 33;
*var_len = sizeof(long);
return (u_char *) &long_return;
}
case EXAMP_DESCR:
{ static char *descr = "cmu-agent mib adding example";
*var_len = strlen (descr);
return (u_char *) descr;
}
default:
ERROR("");
}
return NULL;
}
#endif /* HAVE_EXAMPLE */
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