Ashin Walpola
0e9525162d
obu-firmware builds against vanetza-idf from microbu-esp32c5/external, but that tree was gitignored, so a clone of this repository could not build the firmware it ships. It is now committed here as ordinary files in its own folder, microbu-esp32c5/: the colleague's commit cf4b99f plus the V2X2MAP bridge's signature verification (--trust) used on the bench. Nothing is fetched from or pushed to the colleague's repository; this repository and its remotes carry everything. The folder's own .gitignore keeps build output, downloaded components and private key material out, as it did there; the committed file set is identical to that repository's tracked files. The ESP32-C5 is still flashed from obu-firmware/, which only takes vanetza-idf from microbu-esp32c5/, so the two stay separate folders. FLASHING.md says how to take a newer version of the colleague's tree (copy it over the folder, rebuild, test, commit).
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
#ifndef OSI_LAYER_HPP_C4VTEZJP
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#define OSI_LAYER_HPP_C4VTEZJP
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#include <boost/range/iterator_range.hpp>
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#include <array>
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#include <cstdint>
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namespace vanetza
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{
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enum class OsiLayer : uint8_t
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{
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Physical = 1,
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Link = 2,
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Network = 3,
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Transport = 4,
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Session = 5,
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Presentation = 6,
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Application = 7
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};
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constexpr OsiLayer min_osi_layer() { return OsiLayer::Physical; }
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constexpr OsiLayer max_osi_layer() { return OsiLayer::Application; }
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constexpr std::array<OsiLayer, 7> osi_layers {{
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OsiLayer::Physical,
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OsiLayer::Link,
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OsiLayer::Network,
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OsiLayer::Transport,
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OsiLayer::Session,
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OsiLayer::Presentation,
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OsiLayer::Application
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}};
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/**
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* Calculate distance between layers
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* \param from start counting at this layer
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* \param to stop counting here
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* \return 0 if equal layers, positive if "to" is a higher layer, negative if "to" is below "from"
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*/
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constexpr int distance(OsiLayer from, OsiLayer to)
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{
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return static_cast<int>(to) - static_cast<int>(from);
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}
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constexpr std::size_t num_osi_layers(OsiLayer from, OsiLayer to)
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{
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return (from <= to ? distance(from, to) + 1 : 0);
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}
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template<OsiLayer FROM, OsiLayer TO>
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std::array<OsiLayer, num_osi_layers(FROM, TO)> osi_layer_range()
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{
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static_assert(FROM <= TO, "FROM layer is above TO layer");
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typedef typename std::underlying_type<OsiLayer>::type num_type;
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num_type num = static_cast<num_type>(FROM);
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std::array<OsiLayer, num_osi_layers(FROM, TO)> layers;
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for (auto& layer : layers) {
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layer = static_cast<OsiLayer>(num++);
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}
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return layers;
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}
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inline boost::iterator_range<decltype(osi_layers)::const_iterator>
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osi_layer_range(OsiLayer from, OsiLayer to)
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{
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if (from <= to) {
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auto begin = osi_layers.cbegin() + distance(min_osi_layer(), from);
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auto end = osi_layers.cend() - distance(to, max_osi_layer());
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return boost::make_iterator_range(begin, end);
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} else {
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return boost::make_iterator_range(osi_layers.cend(), osi_layers.cend());
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}
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}
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} // namespace vanetza
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#endif /* OSI_LAYER_HPP_C4VTEZJP */
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