147 lines
4 KiB
C
147 lines
4 KiB
C
/* $OpenBSD: application_blocklist.c,v 1.2 2023/12/21 12:43:31 martijn Exp $ */
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/*
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* Copyright (c) 2022 Martijn van Duren <martijn@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/types.h>
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#include <stddef.h>
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#include <ber.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "application.h"
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#include "log.h"
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#include "snmpd.h"
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struct appl_varbind *appl_blocklist_response(size_t);
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void appl_blocklist_get(struct appl_backend *, int32_t, int32_t, const char *,
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struct appl_varbind *);
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void appl_blocklist_getnext(struct appl_backend *, int32_t, int32_t,
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const char *, struct appl_varbind *);
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struct appl_backend_functions appl_blocklist_functions = {
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.ab_get = appl_blocklist_get,
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.ab_getnext = appl_blocklist_getnext,
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.ab_getbulk = NULL,
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};
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struct appl_backend appl_blocklist = {
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.ab_name = "blocklist",
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.ab_cookie = NULL,
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.ab_retries = 0,
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.ab_fn = &appl_blocklist_functions
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};
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static struct appl_varbind *response = NULL;
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static size_t responsesz = 0;
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struct appl_varbind *
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appl_blocklist_response(size_t nvarbind)
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{
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struct appl_varbind *tmp;
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size_t i;
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if (responsesz < nvarbind) {
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if ((tmp = recallocarray(response, responsesz, nvarbind,
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sizeof(*response))) == NULL) {
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log_warn(NULL);
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return NULL;
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}
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responsesz = nvarbind;
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response = tmp;
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}
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for (i = 0; i < nvarbind; i++)
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response[i].av_next = i + 1 == nvarbind ?
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NULL : &(response[i + 1]);
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return response;
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}
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void
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appl_blocklist_init(void)
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{
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extern struct snmpd *snmpd_env;
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size_t i;
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for (i = 0; i < snmpd_env->sc_nblocklist; i++)
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appl_register(NULL, 150, 1, &(snmpd_env->sc_blocklist[i]),
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0, 1, 0, 0, &appl_blocklist);
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}
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void
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appl_blocklist_shutdown(void)
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{
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appl_close(&appl_blocklist);
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free(response);
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}
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void
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appl_blocklist_get(struct appl_backend *backend, __unused int32_t transactionid,
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int32_t requestid, __unused const char *ctx, struct appl_varbind *vblist)
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{
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struct appl_varbind *vb, *rvb, *rvblist;
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size_t i;
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for (i = 0, vb = vblist; vb != NULL; vb = vb->av_next)
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i++;
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if ((rvblist = appl_blocklist_response(i)) == NULL)
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goto fail;
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rvb = rvblist;
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for (vb = vblist; vb != NULL; vb = vb->av_next, rvb = rvb->av_next) {
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rvb->av_oid = vb->av_oid;
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rvb->av_value = appl_exception(APPL_EXC_NOSUCHOBJECT);
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if (rvb->av_value == NULL)
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goto fail;
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}
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appl_response(backend, requestid, APPL_ERROR_NOERROR, 0, rvblist);
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return;
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fail:
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for (rvb = rvblist; rvb != NULL && rvb->av_value != NULL;
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rvb = rvb->av_next)
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ober_free_elements(rvb->av_value);
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appl_response(backend, requestid, APPL_ERROR_GENERR, 1, vb);
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}
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void
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appl_blocklist_getnext(struct appl_backend *backend,
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__unused int32_t transactionid, int32_t requestid, __unused const char *ctx,
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struct appl_varbind *vblist)
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{
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struct appl_varbind *vb, *rvb, *rvblist;
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size_t i;
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for (i = 0, vb = vblist; vb != NULL; vb = vb->av_next)
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i++;
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if ((rvblist = appl_blocklist_response(i)) == NULL)
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goto fail;
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rvb = rvblist;
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for (vb = vblist; vb != NULL; vb = vb->av_next, rvb = rvb->av_next) {
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rvb->av_oid = vb->av_oid;
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rvb->av_value = appl_exception(APPL_EXC_ENDOFMIBVIEW);
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if (rvb->av_value == NULL)
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goto fail;
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}
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appl_response(backend, requestid, APPL_ERROR_NOERROR, 0, rvblist);
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return;
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fail:
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for (rvb = rvblist; rvb != NULL && rvb->av_value != NULL;
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rvb = rvb->av_next)
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ober_free_elements(rvb->av_value);
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appl_response(backend, requestid, APPL_ERROR_GENERR, 1, vb);
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}
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