/contrib/bsnmp/snmp_mibII/mibII_ifstack.c

  1/*
  2 * Copyright (c) 2001-2003
  3 *	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
  4 *	All rights reserved.
  5 *
  6 * Author: Harti Brandt <harti@freebsd.org>
  7 * 
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions
 10 * are met:
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 
 17 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27 * SUCH DAMAGE.
 28 *
 29 * $Begemot: bsnmp/snmp_mibII/mibII_ifstack.c,v 1.7 2004/08/06 08:47:00 brandt Exp $
 30 *
 31 * ifStackTable. Read-only.
 32 */
 33#include "mibII.h"
 34
 35int
 36mib_ifstack_create(const struct mibif *lower, const struct mibif *upper)
 37{
 38	struct mibifstack *stack;
 39
 40	if ((stack = malloc(sizeof(*stack))) == NULL)
 41		return (-1);
 42
 43	stack->index.len = 2;
 44	stack->index.subs[0] = upper ? upper->index : 0;
 45	stack->index.subs[1] = lower ? lower->index : 0;
 46
 47	INSERT_OBJECT_OID(stack, &mibifstack_list);
 48
 49	mib_ifstack_last_change = get_ticks();
 50
 51	return (0);
 52}
 53
 54void
 55mib_ifstack_delete(const struct mibif *lower, const struct mibif *upper)
 56{
 57	struct mibifstack *stack;
 58
 59	TAILQ_FOREACH(stack, &mibifstack_list, link)
 60		if (stack->index.subs[0] == (upper ? upper->index : 0) &&
 61		    stack->index.subs[1] == (lower ? lower->index : 0)) {
 62			TAILQ_REMOVE(&mibifstack_list, stack, link);
 63			free(stack);
 64			mib_ifstack_last_change = get_ticks();
 65			return;
 66		}
 67}
 68
 69int
 70op_ifstack(struct snmp_context *ctx __unused, struct snmp_value *value,
 71    u_int sub, u_int iidx __unused, enum snmp_op op)
 72{
 73	struct mibifstack *stack;
 74
 75	switch (op) {
 76
 77	  case SNMP_OP_GETNEXT:
 78		if ((stack = NEXT_OBJECT_OID(&mibifstack_list, &value->var, sub)) == NULL)
 79			return (SNMP_ERR_NOSUCHNAME);
 80		index_append(&value->var, sub, &stack->index);
 81		break;
 82
 83	  case SNMP_OP_GET:
 84		if ((stack = FIND_OBJECT_OID(&mibifstack_list, &value->var, sub)) == NULL)
 85			return (SNMP_ERR_NOSUCHNAME);
 86		break;
 87
 88	  case SNMP_OP_SET:
 89		if ((stack = FIND_OBJECT_OID(&mibifstack_list, &value->var, sub)) == NULL)
 90			return (SNMP_ERR_NO_CREATION);
 91		return (SNMP_ERR_NOT_WRITEABLE);
 92
 93	  case SNMP_OP_ROLLBACK:
 94	  case SNMP_OP_COMMIT:
 95		abort();
 96	}
 97
 98	switch (value->var.subs[sub - 1]) {
 99
100	  case LEAF_ifStackStatus:
101		value->v.integer = 1;
102		break;
103	}
104	return (SNMP_ERR_NOERROR);
105}