mibII_rcvaddr.c revision 122394 
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 of this software and documentation and use in source and
9 * binary forms, with or without modification, are permitted provided that
10 * the following conditions are met:
11 *
12 * 1. Redistributions of source code or documentation must retain the above
13 *    copyright notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY FRAUNHOFER FOKUS
22 * AND ITS CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
23 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
24 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
25 * FRAUNHOFER FOKUS OR ITS CONTRIBUTORS  BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
28 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
31 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 * $Begemot: bsnmp/snmp_mibII/mibII_rcvaddr.c,v 1.7 2003/01/28 13:44:35 hbb Exp $
34 *
35 * Interface receive address table.
36 */
37#include "mibII.h"
38#include "mibII_oid.h"
39
40/*
41 * find receive address
42 */
43struct mibrcvaddr *
44mib_find_rcvaddr(u_int ifindex, const u_char *addr, size_t addrlen)
45{
46	struct mibrcvaddr *rcv;
47
48	TAILQ_FOREACH(rcv, &mibrcvaddr_list, link)
49		if (rcv->ifindex == ifindex &&
50		    rcv->addrlen == addrlen &&
51		    memcmp(rcv->addr, addr, addrlen) == 0)
52			return (rcv);
53	return (NULL);
54}
55
56/*
57 * Create receive address
58 */
59struct mibrcvaddr *
60mib_rcvaddr_create(struct mibif *ifp, const u_char *addr, size_t addrlen)
61{
62	struct mibrcvaddr *rcv;
63	u_int i;
64
65	if (addrlen + OIDLEN_ifRcvAddressEntry + 1 > ASN_MAXOIDLEN)
66		return (NULL);
67
68	if ((rcv = malloc(sizeof(*rcv))) == NULL)
69		return (NULL);
70	rcv->ifindex = ifp->index;
71	rcv->addrlen = addrlen;
72	memcpy(rcv->addr, addr, addrlen);
73	rcv->flags = 0;
74
75	rcv->index.len = addrlen + 2;
76	rcv->index.subs[0] = ifp->index;
77	rcv->index.subs[1] = addrlen;
78	for (i = 0; i < addrlen; i++)
79		rcv->index.subs[i + 2] = addr[i];
80
81	INSERT_OBJECT_OID(rcv, &mibrcvaddr_list);
82
83	return (rcv);
84}
85
86/*
87 * Delete a receive address
88 */
89void
90mib_rcvaddr_delete(struct mibrcvaddr *rcv)
91{
92	TAILQ_REMOVE(&mibrcvaddr_list, rcv, link);
93	free(rcv);
94}
95
96int
97op_rcvaddr(struct snmp_context *ctx __unused, struct snmp_value *value,
98    u_int sub, u_int iidx __unused, enum snmp_op op)
99{
100	struct mibrcvaddr *rcv;
101
102	rcv = NULL;	/* make compiler happy */
103
104	switch (op) {
105
106	  case SNMP_OP_GETNEXT:
107		if ((rcv = NEXT_OBJECT_OID(&mibrcvaddr_list, &value->var, sub)) == NULL)
108			return (SNMP_ERR_NOSUCHNAME);
109		index_append(&value->var, sub, &rcv->index);
110		break;
111
112	  case SNMP_OP_GET:
113		if ((rcv = FIND_OBJECT_OID(&mibrcvaddr_list, &value->var, sub)) == NULL)
114			return (SNMP_ERR_NOSUCHNAME);
115		break;
116
117	  case SNMP_OP_SET:
118		if ((rcv = FIND_OBJECT_OID(&mibrcvaddr_list, &value->var, sub)) == NULL)
119			return (SNMP_ERR_NO_CREATION);
120		return (SNMP_ERR_NOT_WRITEABLE);
121
122	  case SNMP_OP_ROLLBACK:
123	  case SNMP_OP_COMMIT:
124		abort();
125	}
126
127	switch (value->var.subs[sub - 1]) {
128
129	  case LEAF_ifRcvAddressStatus:
130		value->v.integer = 1;
131		break;
132
133	  case LEAF_ifRcvAddressType:
134		value->v.integer = (rcv->flags & MIBRCVADDR_VOLATILE) ? 2 : 3;
135		break;
136	}
137	return (SNMP_ERR_NOERROR);
138}
139