1 | /* $NetBSD: ieee8023_tlv.c,v 1.3 2007/02/21 23:00:06 thorpej Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c)2005 YAMAMOTO Takashi, |
5 | * All rights reserved. |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
10 | * 1. Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
26 | * SUCH DAMAGE. |
27 | */ |
28 | |
29 | #include <sys/cdefs.h> |
30 | __KERNEL_RCSID(0, "$NetBSD: ieee8023_tlv.c,v 1.3 2007/02/21 23:00:06 thorpej Exp $" ); |
31 | |
32 | #include <sys/param.h> |
33 | #include <sys/systm.h> |
34 | |
35 | #include <net/agr/ieee8023_tlv.h> |
36 | |
37 | int |
38 | tlv_check(const void *p, size_t size, const struct tlvhdr *tlv, |
39 | const struct tlv_template *tmpl, bool check_type) |
40 | { |
41 | |
42 | while (/* CONSTCOND */ 1) { |
43 | if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) { |
44 | return EINVAL; |
45 | } |
46 | if ((check_type && tlv->tlv_type != tmpl->tmpl_type) || |
47 | tlv->tlv_length != tmpl->tmpl_length) { |
48 | return EINVAL; |
49 | } |
50 | if (tmpl->tmpl_type == 0) { |
51 | break; |
52 | } |
53 | tlv = (const struct tlvhdr *) |
54 | ((const char *)tlv + tlv->tlv_length); |
55 | tmpl++; |
56 | } |
57 | |
58 | return 0; |
59 | } |
60 | |
61 | |