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Syntax
class Icmp : public InstanceLocator,
private NonCopyable
{
public:
OT_TOOL_PACKED_BEGIN
class Header : public otIcmp6Header, public Clearable<Header>
{
public:
enum Type : uint8_t
{
kTypeDstUnreach = OT_ICMP6_TYPE_DST_UNREACH,
kTypePacketToBig = OT_ICMP6_TYPE_PACKET_TO_BIG,
kTypeTimeExceeded = OT_ICMP6_TYPE_TIME_EXCEEDED,
kTypeParameterProblem = OT_ICMP6_TYPE_PARAMETER_PROBLEM,
kTypeEchoRequest = OT_ICMP6_TYPE_ECHO_REQUEST,
kTypeEchoReply = OT_ICMP6_TYPE_ECHO_REPLY,
kTypeRouterSolicit = OT_ICMP6_TYPE_ROUTER_SOLICIT,
kTypeRouterAdvert = OT_ICMP6_TYPE_ROUTER_ADVERT,
kTypeNeighborSolicit = OT_ICMP6_TYPE_NEIGHBOR_SOLICIT,
kTypeNeighborAdvert = OT_ICMP6_TYPE_NEIGHBOR_ADVERT,
};
enum Code : uint8_t
{
kCodeDstUnreachNoRoute = OT_ICMP6_CODE_DST_UNREACH_NO_ROUTE,
kCodeDstUnreachProhibited = OT_ICMP6_CODE_DST_UNREACH_PROHIBITED,
kCodeFragmReasTimeEx = OT_ICMP6_CODE_FRAGM_REAS_TIME_EX,
};
static constexpr uint8_t kTypeFieldOffset = 0;
static constexpr uint8_t kCodeFieldOffset = 1;
static constexpr uint8_t kChecksumFieldOffset = 2;
static constexpr uint8_t kDataFieldOffset = 4;
bool IsError(void) const { return mType < OT_ICMP6_TYPE_ECHO_REQUEST; }
Type GetType(void) const { return static_cast<Type>(mType); }
void SetType(Type aType) { mType = static_cast<uint8_t>(aType); }
Code GetCode(void) const { return static_cast<Code>(mCode); }
void SetCode(Code aCode) { mCode = static_cast<uint8_t>(aCode); }
uint16_t GetChecksum(void) const { return BigEndian::HostSwap16(mChecksum); }
void SetChecksum(uint16_t aChecksum) { mChecksum = BigEndian::HostSwap16(aChecksum); }
uint16_t GetId(void) const { return BigEndian::HostSwap16(mData.m16[0]); }
void SetId(uint16_t aId) { mData.m16[0] = BigEndian::HostSwap16(aId); }
uint16_t GetSequence(void) const { return BigEndian::HostSwap16(mData.m16[1]); }
void SetSequence(uint16_t aSequence) { mData.m16[1] = BigEndian::HostSwap16(aSequence); }
} OT_TOOL_PACKED_END;
class Handler : public otIcmp6Handler, public LinkedListEntry<Handler>
{
friend class Icmp;
public:
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);
}
};
explicit Icmp(Instance &aInstance);
Message *NewMessage(void);
Error RegisterHandler(Handler &aHandler);
Error SendEchoRequest(Message &aMessage, const MessageInfo &aMessageInfo, uint16_t aIdentifier);
Error SendError(Header::Type aType, Header::Code aCode, const MessageInfo &aMessageInfo, const Message &aMessage);
Error SendError(Header::Type aType, Header::Code aCode, const MessageInfo &aMessageInfo, const Headers &aHeaders);
Error HandleMessage(Message &aMessage, MessageInfo &aMessageInfo);
otIcmp6EchoMode GetEchoMode(void) const { return mEchoMode; }
void SetEchoMode(otIcmp6EchoMode aMode) { mEchoMode = aMode; }
bool ShouldHandleEchoRequest(const Address &aAddress);
uint16_t GetEchoSequence(void) const { return mEchoSequence; }
private:
Error HandleEchoRequest(Message &aRequestMessage, const MessageInfo &aMessageInfo);
LinkedList<Handler> mHandlers;
uint16_t mEchoSequence;
otIcmp6EchoMode mEchoMode;
};
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