| 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 | |