Exemplo n.º 1
0
    Fragments::Fragments(IMC::Message* msg, int mtu)
    {
      m_uid = s_uid++;
      m_num_frags = 0;
      int frag_size = mtu - sizeof(IMC::Header) - 5;
      if (frag_size <= 0)
      {
        DUNE_ERR("Fragments", "MTU is too small");
        return;
      }

      Utils::ByteBuffer buff;
      int size = IMC::Packet::serialize(msg, buff);
      uint8_t* buffer = buff.getBuffer();

      int part = 0, pos = 0;
      m_num_frags = (int)std::ceil((float)size / (float)mtu);

      while (pos < size)
      {
        int remaining = size - pos;
        int cur_size = std::min(remaining, mtu);
        IMC::MessagePart* mpart = new IMC::MessagePart();
        mpart->frag_number = part++;
        mpart->num_frags = m_num_frags;
        mpart->uid = m_uid;
        mpart->data.assign(buffer + pos, buffer + pos + cur_size);
        pos += cur_size;
        m_fragments.push_back(mpart);
      }
    }
Exemplo n.º 2
0
    uint16_t
    Packet::serialize(const Message* msg, Utils::ByteBuffer& bfr)
    {
      unsigned size = msg->getSerializationSize();
      if (size > 65535)
        throw InvalidMessageSize(size);

      bfr.setSize(size);
      return serialize(msg, bfr.getBuffer(), size);
    }