| /* |
| * Copyright (c) 2017, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** |
| * @file |
| * This file implements IP6 header processing. |
| */ |
| |
| #include "ip6_headers.hpp" |
| |
| #include "net/ip6.hpp" |
| |
| namespace ot { |
| namespace Ip6 { |
| |
| Error Header::ParseFrom(const Message &aMessage) |
| { |
| Error error = kErrorParse; |
| |
| SuccessOrExit(aMessage.Read(0, *this)); |
| VerifyOrExit(IsValid()); |
| VerifyOrExit(sizeof(Header) + GetPayloadLength() == aMessage.GetLength()); |
| |
| error = kErrorNone; |
| |
| exit: |
| return error; |
| } |
| |
| bool Header::IsValid(void) const |
| { |
| #if !OPENTHREAD_CONFIG_IP6_FRAGMENTATION_ENABLE |
| static constexpr uint32_t kMaxLength = kMaxDatagramLength; |
| #else |
| static constexpr uint32_t kMaxLength = kMaxAssembledDatagramLength; |
| #endif |
| |
| return IsVersion6() && ((sizeof(Header) + GetPayloadLength()) <= kMaxLength); |
| } |
| |
| } // namespace Ip6 |
| } // namespace ot |