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/* $OpenBSD: application_blocklist.c,v 1.1 2022/06/30 11:28:36 martijn Exp $ */
/*
* Copyright (c) 2022 Martijn van Duren <martijn@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, 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 <event.h>
#include <stdlib.h>
#include "application.h"
#include "snmpd.h"
struct appl_varbind *appl_blocklist_response(size_t);
void appl_blocklist_get(struct appl_backend *, int32_t, int32_t, const char *,
struct appl_varbind *);
void appl_blocklist_getnext(struct appl_backend *, int32_t, int32_t,
const char *, struct appl_varbind *);
struct appl_backend_functions appl_blocklist_functions = {
.ab_get = appl_blocklist_get,
.ab_getnext = appl_blocklist_getnext,
.ab_getbulk = NULL,
};
struct appl_backend appl_blocklist = {
.ab_name = "blocklist",
.ab_cookie = NULL,
.ab_retries = 0,
.ab_fn = &appl_blocklist_functions
};
static struct appl_varbind *response = NULL;
static size_t responsesz = 0;
struct appl_varbind *
appl_blocklist_response(size_t nvarbind)
{
struct appl_varbind *tmp;
size_t i;
if (responsesz < nvarbind) {
if ((tmp = recallocarray(response, responsesz, nvarbind,
sizeof(*response))) == NULL) {
log_warn(NULL);
return NULL;
}
responsesz = nvarbind;
response = tmp;
}
for (i = 0; i < nvarbind; i++)
response[i].av_next = i + 1 == nvarbind ?
NULL : &(response[i + 1]);
return response;
}
void
appl_blocklist_init(void)
{
extern struct snmpd *snmpd_env;
size_t i;
for (i = 0; i < snmpd_env->sc_nblocklist; i++)
appl_register(NULL, 150, 1, &(snmpd_env->sc_blocklist[i]),
0, 1, 0, 0, &appl_blocklist);
}
void
appl_blocklist_shutdown(void)
{
appl_close(&appl_blocklist);
free(response);
}
void
appl_blocklist_get(struct appl_backend *backend, __unused int32_t transactionid,
int32_t requestid, __unused const char *ctx, struct appl_varbind *vblist)
{
struct appl_varbind *vb, *rvb, *rvblist;
size_t i;
for (i = 0, vb = vblist; vb != NULL; vb = vb->av_next)
i++;
if ((rvblist = appl_blocklist_response(i)) == NULL)
goto fail;
rvb = rvblist;
for (vb = vblist; vb != NULL; vb = vb->av_next, rvb = rvb->av_next) {
rvb->av_oid = vb->av_oid;
rvb->av_value = appl_exception(APPL_EXC_NOSUCHOBJECT);
if (rvb->av_value == NULL)
goto fail;
}
appl_response(backend, requestid, APPL_ERROR_NOERROR, 0, rvblist);
return;
fail:
for (rvb = rvblist; rvb != NULL && rvb->av_value != NULL;
rvb = rvb->av_next)
ober_free_elements(rvb->av_value);
appl_response(backend, requestid, APPL_ERROR_GENERR, 1, vb);
}
void
appl_blocklist_getnext(struct appl_backend *backend,
__unused int32_t transactionid, int32_t requestid, __unused const char *ctx,
struct appl_varbind *vblist)
{
struct appl_varbind *vb, *rvb, *rvblist;
size_t i;
for (i = 0, vb = vblist; vb != NULL; vb = vb->av_next)
i++;
if ((rvblist = appl_blocklist_response(i)) == NULL)
goto fail;
rvb = rvblist;
for (vb = vblist; vb != NULL; vb = vb->av_next, rvb = rvb->av_next) {
rvb->av_oid = vb->av_oid;
rvb->av_value = appl_exception(APPL_EXC_ENDOFMIBVIEW);
if (rvb->av_value == NULL)
goto fail;
}
appl_response(backend, requestid, APPL_ERROR_NOERROR, 0, rvblist);
return;
fail:
for (rvb = rvblist; rvb != NULL && rvb->av_value != NULL;
rvb = rvb->av_next)
ober_free_elements(rvb->av_value);
appl_response(backend, requestid, APPL_ERROR_GENERR, 1, vb);
}
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