C++ (Cpp) BitVectorBytes示例

示例#1

文件： network_data.cpp 项目： BJangeofan/openthread

int8_t NetworkData::PrefixMatch(const uint8_t *a, const uint8_t *b, uint8_t aLength)
{
    uint8_t rval = 0;
    uint8_t bytes = BitVectorBytes(aLength);
    uint8_t diff;

    for (uint8_t i = 0; i < bytes; i++)
    {
        diff = a[i] ^ b[i];

        if (diff == 0)
        {
            rval += 8;
        }
        else
        {
            while ((diff & 0x80) == 0)
            {
                rval++;
                diff <<= 1;
            }

            break;
        }
    }

    return (rval >= aLength) ? rval : -1;
}

示例#2

文件： network_data_local.cpp 项目： BJangeofan/openthread

ThreadError Local::AddHasRoutePrefix(const uint8_t *aPrefix, uint8_t aPrefixLength, int8_t aPrf, bool aStable)
{
    PrefixTlv *prefixTlv;
    HasRouteTlv *hasRouteTlv;

    RemoveHasRoutePrefix(aPrefix, aPrefixLength);

    prefixTlv = reinterpret_cast<PrefixTlv *>(mTlvs + mLength);
    Insert(reinterpret_cast<uint8_t *>(prefixTlv),
           sizeof(PrefixTlv) + BitVectorBytes(aPrefixLength) + sizeof(HasRouteTlv) + sizeof(HasRouteEntry));
    prefixTlv->Init(0, aPrefixLength, aPrefix);
    prefixTlv->SetSubTlvsLength(sizeof(HasRouteTlv) + sizeof(HasRouteEntry));

    hasRouteTlv = reinterpret_cast<HasRouteTlv *>(prefixTlv->GetSubTlvs());
    hasRouteTlv->Init();
    hasRouteTlv->SetLength(hasRouteTlv->GetLength() + sizeof(HasRouteEntry));
    hasRouteTlv->GetEntry(0)->Init();
    hasRouteTlv->GetEntry(0)->SetPreference(aPrf);

    if (aStable)
    {
        prefixTlv->SetStable();
        hasRouteTlv->SetStable();
    }

    otDumpDebgNetData("add route done", mTlvs, mLength);
    return kThreadError_None;
}

示例#3

文件： network_data_local.cpp 项目： abtink/openthread

otError Local::AddOnMeshPrefix(const uint8_t *aPrefix, uint8_t aPrefixLength, int8_t aPrf, uint8_t aFlags, bool aStable)
{
    otError          error             = OT_ERROR_NONE;
    uint8_t          prefixLengthBytes = BitVectorBytes(aPrefixLength);
    uint8_t          appendLength;
    PrefixTlv *      prefixTlv;
    BorderRouterTlv *brTlv;

    VerifyOrExit(prefixLengthBytes <= sizeof(Ip6::Address), error = OT_ERROR_INVALID_ARGS);

    VerifyOrExit((aPrf == OT_ROUTE_PREFERENCE_LOW) || (aPrf == OT_ROUTE_PREFERENCE_MED) ||
                     (aPrf == OT_ROUTE_PREFERENCE_HIGH),
                 error = OT_ERROR_INVALID_ARGS);

    VerifyOrExit(Ip6::Address::PrefixMatch(aPrefix, Get<Mle::MleRouter>().GetMeshLocalPrefix().m8, prefixLengthBytes) <
                     Ip6::Address::kMeshLocalPrefixLength,
                 error = OT_ERROR_INVALID_ARGS);

    RemoveOnMeshPrefix(aPrefix, aPrefixLength);

    appendLength = sizeof(PrefixTlv) + prefixLengthBytes + sizeof(BorderRouterTlv) + sizeof(BorderRouterEntry);
    VerifyOrExit(mLength + appendLength <= sizeof(mTlvs), error = OT_ERROR_NO_BUFS);

    prefixTlv = reinterpret_cast<PrefixTlv *>(mTlvs + mLength);
    Insert(reinterpret_cast<uint8_t *>(prefixTlv), appendLength);
    prefixTlv->Init(0, aPrefixLength, aPrefix);
    prefixTlv->SetSubTlvsLength(sizeof(BorderRouterTlv) + sizeof(BorderRouterEntry));

    brTlv = static_cast<BorderRouterTlv *>(prefixTlv->GetSubTlvs());
    brTlv->Init();
    brTlv->SetLength(brTlv->GetLength() + sizeof(BorderRouterEntry));
    brTlv->GetEntry(0)->Init();
    brTlv->GetEntry(0)->SetPreference(aPrf);
    brTlv->GetEntry(0)->SetFlags(aFlags);

    if (aStable)
    {
        prefixTlv->SetStable();
        brTlv->SetStable();
    }

    ClearResubmitDelayTimer();

    otDumpDebgNetData("add prefix done", mTlvs, mLength);

exit:
    return error;
}

示例#4

文件： network_data_local.cpp 项目： abtink/openthread

otError Local::AddHasRoutePrefix(const uint8_t *aPrefix, uint8_t aPrefixLength, int8_t aPrf, bool aStable)
{
    otError      error             = OT_ERROR_NONE;
    uint8_t      prefixLengthBytes = BitVectorBytes(aPrefixLength);
    PrefixTlv *  prefixTlv;
    HasRouteTlv *hasRouteTlv;
    uint8_t      appendLength;

    VerifyOrExit(prefixLengthBytes <= sizeof(Ip6::Address), error = OT_ERROR_INVALID_ARGS);

    VerifyOrExit((aPrf == OT_ROUTE_PREFERENCE_LOW) || (aPrf == OT_ROUTE_PREFERENCE_MED) ||
                     (aPrf == OT_ROUTE_PREFERENCE_HIGH),
                 error = OT_ERROR_INVALID_ARGS);

    RemoveHasRoutePrefix(aPrefix, aPrefixLength);

    appendLength = sizeof(PrefixTlv) + prefixLengthBytes + sizeof(HasRouteTlv) + sizeof(HasRouteEntry);
    VerifyOrExit(mLength + appendLength <= sizeof(mTlvs), error = OT_ERROR_NO_BUFS);

    prefixTlv = reinterpret_cast<PrefixTlv *>(mTlvs + mLength);
    Insert(reinterpret_cast<uint8_t *>(prefixTlv), appendLength);
    prefixTlv->Init(0, aPrefixLength, aPrefix);
    prefixTlv->SetSubTlvsLength(sizeof(HasRouteTlv) + sizeof(HasRouteEntry));

    hasRouteTlv = static_cast<HasRouteTlv *>(prefixTlv->GetSubTlvs());
    hasRouteTlv->Init();
    hasRouteTlv->SetLength(hasRouteTlv->GetLength() + sizeof(HasRouteEntry));
    hasRouteTlv->GetEntry(0)->Init();
    hasRouteTlv->GetEntry(0)->SetPreference(aPrf);

    if (aStable)
    {
        prefixTlv->SetStable();
        hasRouteTlv->SetStable();
    }

    ClearResubmitDelayTimer();

    otDumpDebgNetData("add route done", mTlvs, mLength);

exit:
    return error;
}