| /* |
| * Copyright (c) 2016, 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 includes definitions for ICMPv6. |
| */ |
| |
| #ifndef ICMP6_HPP_ |
| #define ICMP6_HPP_ |
| |
| #include "openthread-core-config.h" |
| |
| #include <openthread/icmp6.h> |
| |
| #include "common/as_core_type.hpp" |
| #include "common/clearable.hpp" |
| #include "common/encoding.hpp" |
| #include "common/linked_list.hpp" |
| #include "common/locator.hpp" |
| #include "common/non_copyable.hpp" |
| #include "net/ip6_headers.hpp" |
| |
| namespace ot { |
| namespace Ip6 { |
| |
| using ot::Encoding::BigEndian::HostSwap16; |
| |
| /** |
| * @addtogroup core-ip6-icmp6 |
| * |
| * @brief |
| * This module includes definitions for ICMPv6. |
| * |
| * @{ |
| * |
| */ |
| |
| /** |
| * This class implements ICMPv6. |
| * |
| */ |
| class Icmp : public InstanceLocator, private NonCopyable |
| { |
| public: |
| /* |
| * This class implements ICMPv6 header generation and parsing. |
| * |
| */ |
| OT_TOOL_PACKED_BEGIN |
| class Header : public otIcmp6Header, public Clearable<Header> |
| { |
| public: |
| /** |
| * ICMPv6 Message Types |
| * |
| */ |
| enum Type : uint8_t |
| { |
| kTypeDstUnreach = OT_ICMP6_TYPE_DST_UNREACH, ///< Destination Unreachable |
| kTypePacketToBig = OT_ICMP6_TYPE_PACKET_TO_BIG, ///< Packet To Big |
| kTypeTimeExceeded = OT_ICMP6_TYPE_TIME_EXCEEDED, ///< Time Exceeded |
| kTypeParameterProblem = OT_ICMP6_TYPE_PARAMETER_PROBLEM, ///< Parameter Problem |
| kTypeEchoRequest = OT_ICMP6_TYPE_ECHO_REQUEST, ///< Echo Request |
| kTypeEchoReply = OT_ICMP6_TYPE_ECHO_REPLY, ///< Echo Reply |
| kTypeRouterSolicit = OT_ICMP6_TYPE_ROUTER_SOLICIT, ///< Router Solicitation |
| kTypeRouterAdvert = OT_ICMP6_TYPE_ROUTER_ADVERT, ///< Router Advertisement |
| }; |
| |
| /** |
| * ICMPv6 Message Codes |
| * |
| */ |
| enum Code : uint8_t |
| { |
| kCodeDstUnreachNoRoute = OT_ICMP6_CODE_DST_UNREACH_NO_ROUTE, ///< Destination Unreachable No Route |
| kCodeFragmReasTimeEx = OT_ICMP6_CODE_FRAGM_REAS_TIME_EX, ///< Fragment Reassembly Time Exceeded |
| }; |
| |
| static constexpr uint8_t kTypeFieldOffset = 0; ///< The byte offset of Type field in ICMP6 header. |
| static constexpr uint8_t kCodeFieldOffset = 1; ///< The byte offset of Code field in ICMP6 header. |
| static constexpr uint8_t kChecksumFieldOffset = 2; ///< The byte offset of Checksum field in ICMP6 header. |
| static constexpr uint8_t kDataFieldOffset = 4; ///< The byte offset of Data field in ICMP6 header. |
| |
| /** |
| * This method indicates whether the ICMPv6 message is an error message. |
| * |
| * @retval TRUE if the ICMPv6 message is an error message. |
| * @retval FALSE if the ICMPv6 message is an informational message. |
| * |
| */ |
| bool IsError(void) const { return mType < OT_ICMP6_TYPE_ECHO_REQUEST; } |
| |
| /** |
| * This method returns the ICMPv6 message type. |
| * |
| * @returns The ICMPv6 message type. |
| * |
| */ |
| Type GetType(void) const { return static_cast<Type>(mType); } |
| |
| /** |
| * This method sets the ICMPv6 message type. |
| * |
| * @param[in] aType The ICMPv6 message type. |
| * |
| */ |
| void SetType(Type aType) { mType = static_cast<uint8_t>(aType); } |
| |
| /** |
| * This method returns the ICMPv6 message code. |
| * |
| * @returns The ICMPv6 message code. |
| * |
| */ |
| Code GetCode(void) const { return static_cast<Code>(mCode); } |
| |
| /** |
| * This method sets the ICMPv6 message code. |
| * |
| * @param[in] aCode The ICMPv6 message code. |
| * |
| */ |
| void SetCode(Code aCode) { mCode = static_cast<uint8_t>(aCode); } |
| |
| /** |
| * This method returns the ICMPv6 message checksum. |
| * |
| * @returns The ICMPv6 message checksum. |
| * |
| */ |
| uint16_t GetChecksum(void) const { return HostSwap16(mChecksum); } |
| |
| /** |
| * This method sets the ICMPv6 message checksum. |
| * |
| * @param[in] aChecksum The ICMPv6 message checksum. |
| * |
| */ |
| void SetChecksum(uint16_t aChecksum) { mChecksum = HostSwap16(aChecksum); } |
| |
| /** |
| * This method returns the ICMPv6 message ID for Echo Requests and Replies. |
| * |
| * @returns The ICMPv6 message ID. |
| * |
| */ |
| uint16_t GetId(void) const { return HostSwap16(mData.m16[0]); } |
| |
| /** |
| * This method sets the ICMPv6 message ID for Echo Requests and Replies. |
| * |
| * @param[in] aId The ICMPv6 message ID. |
| * |
| */ |
| void SetId(uint16_t aId) { mData.m16[0] = HostSwap16(aId); } |
| |
| /** |
| * This method returns the ICMPv6 message sequence for Echo Requests and Replies. |
| * |
| * @returns The ICMPv6 message sequence. |
| * |
| */ |
| uint16_t GetSequence(void) const { return HostSwap16(mData.m16[1]); } |
| |
| /** |
| * This method sets the ICMPv6 message sequence for Echo Requests and Replies. |
| * |
| * @param[in] aSequence The ICMPv6 message sequence. |
| * |
| */ |
| void SetSequence(uint16_t aSequence) { mData.m16[1] = HostSwap16(aSequence); } |
| } OT_TOOL_PACKED_END; |
| |
| /** |
| * This class implements ICMPv6 message handlers. |
| * |
| */ |
| class Handler : public otIcmp6Handler, public LinkedListEntry<Handler> |
| { |
| friend class Icmp; |
| |
| public: |
| /** |
| * This constructor creates an ICMPv6 message handler. |
| * |
| * @param[in] aCallback A pointer to the function that is called when receiving an ICMPv6 message. |
| * @param[in] aContext A pointer to arbitrary context information. |
| * |
| */ |
| Handler(otIcmp6ReceiveCallback aCallback, void *aContext) |
| { |
| mReceiveCallback = aCallback; |
| mContext = aContext; |
| mNext = nullptr; |
| } |
| |
| private: |
| void HandleReceiveMessage(Message &aMessage, const MessageInfo &aMessageInfo, const Header &aIcmp6Header) |
| { |
| mReceiveCallback(mContext, &aMessage, &aMessageInfo, &aIcmp6Header); |
| } |
| }; |
| |
| /** |
| * This constructor initializes the object. |
| * |
| * @param[in] aInstance A reference to the OpenThread instance. |
| * |
| */ |
| explicit Icmp(Instance &aInstance); |
| |
| /** |
| * This method returns a new ICMP message with sufficient header space reserved. |
| * |
| * @param[in] aReserved The number of header bytes to reserve after the ICMP header. |
| * |
| * @returns A pointer to the message or `nullptr` if no buffers are available. |
| * |
| */ |
| Message *NewMessage(uint16_t aReserved); |
| |
| /** |
| * This method registers ICMPv6 handler. |
| * |
| * @param[in] aHandler A reference to the ICMPv6 handler. |
| * |
| * @retval kErrorNone Successfully registered the ICMPv6 handler. |
| * @retval kErrorAlready The ICMPv6 handler is already registered. |
| * |
| */ |
| Error RegisterHandler(Handler &aHandler); |
| |
| /** |
| * This method sends an ICMPv6 Echo Request message. |
| * |
| * @param[in] aMessage A reference to the Echo Request payload. |
| * @param[in] aMessageInfo A reference to the message info associated with @p aMessage. |
| * @param[in] aIdentifier An identifier to aid in matching Echo Replies to this Echo Request. |
| * May be zero. |
| * |
| * @retval kErrorNone Successfully enqueued the ICMPv6 Echo Request message. |
| * @retval kErrorNoBufs Insufficient buffers available to generate an ICMPv6 Echo Request message. |
| * |
| */ |
| Error SendEchoRequest(Message &aMessage, const MessageInfo &aMessageInfo, uint16_t aIdentifier); |
| |
| /** |
| * This method sends an ICMPv6 error message. |
| * |
| * @param[in] aType The ICMPv6 message type. |
| * @param[in] aCode The ICMPv6 message code. |
| * @param[in] aMessageInfo A reference to the message info. |
| * @param[in] aMessage The error-causing IPv6 message. |
| * |
| * @retval kErrorNone Successfully enqueued the ICMPv6 error message. |
| * @retval kErrorNoBufs Insufficient buffers available. |
| * |
| */ |
| Error SendError(Header::Type aType, Header::Code aCode, const MessageInfo &aMessageInfo, const Message &aMessage); |
| |
| /** |
| * This method handles an ICMPv6 message. |
| * |
| * @param[in] aMessage A reference to the ICMPv6 message. |
| * @param[in] aMessageInfo A reference to the message info associated with @p aMessage. |
| * |
| * @retval kErrorNone Successfully processed the ICMPv6 message. |
| * @retval kErrorNoBufs Insufficient buffers available to generate the reply. |
| * @retval kErrorDrop The ICMPv6 message was invalid and dropped. |
| * |
| */ |
| Error HandleMessage(Message &aMessage, MessageInfo &aMessageInfo); |
| |
| /** |
| * This method indicates whether or not ICMPv6 Echo processing is enabled. |
| * |
| * @retval TRUE ICMPv6 Echo processing is enabled. |
| * @retval FALSE ICMPv6 Echo processing is disabled. |
| * |
| */ |
| otIcmp6EchoMode GetEchoMode(void) const { return mEchoMode; } |
| |
| /** |
| * Sets the ICMPv6 echo mode. |
| * |
| * @param[in] aMode The ICMPv6 echo mode. |
| * |
| */ |
| void SetEchoMode(otIcmp6EchoMode aMode) { mEchoMode = aMode; } |
| |
| /** |
| * This method indicates whether or not the ICMPv6 Echo Request should be handled. |
| * |
| * @retval TRUE if OpenThread should respond with an ICMPv6 Echo Reply. |
| * @retval FALSE if OpenThread should not respond with an ICMPv6 Echo Reply. |
| * |
| */ |
| bool ShouldHandleEchoRequest(const MessageInfo &aMessageInfo); |
| |
| /** |
| * This method returns the ICMPv6 Echo sequence number. |
| * |
| * @returns The sequence number of the next ICMPv6 Echo request. |
| * |
| */ |
| uint16_t GetEchoSequence(void) const { return mEchoSequence; } |
| |
| private: |
| Error HandleEchoRequest(Message &aRequestMessage, const MessageInfo &aMessageInfo); |
| |
| LinkedList<Handler> mHandlers; |
| |
| uint16_t mEchoSequence; |
| otIcmp6EchoMode mEchoMode; |
| }; |
| |
| /** |
| * @} |
| * |
| */ |
| |
| } // namespace Ip6 |
| |
| DefineCoreType(otIcmp6Header, Ip6::Icmp::Header); |
| DefineCoreType(otIcmp6Handler, Ip6::Icmp::Handler); |
| |
| } // namespace ot |
| |
| #endif // ICMP6_HPP_ |