48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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#pragma once
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#include <array>
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#include <cstdint>
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#include <span>
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#include "callback_list.h"
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#include "span_writer.h"
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namespace eth {
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using mac_addr = std::array<uint8_t, 6>;
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static constexpr mac_addr MAC_BROADCAST = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
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static constexpr uint16_t ETH_ARP = __builtin_bswap16(0x0806);
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static constexpr uint16_t ETH_IPV4 = __builtin_bswap16(0x0800);
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struct __attribute__((packed)) header {
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mac_addr dst;
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mac_addr src;
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uint16_t ethertype;
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};
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static_assert(sizeof(header) == 14);
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template <typename Buf>
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void prepend(Buf& buf, const mac_addr& dst, const mac_addr& src, uint16_t ethertype) {
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auto* h = buf.template prepend<header>();
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h->dst = dst;
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h->src = src;
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h->ethertype = ethertype;
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}
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using frame_callback = bool (*)(std::span<const uint8_t> frame);
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using frame_cb_list = callback_list<frame_callback, 16>;
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using frame_cb_handle = frame_cb_list::node*;
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using ethertype_handler = void (*)(std::span<const uint8_t> frame, span_writer& tx);
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using mac_filter = bool (*)(const mac_addr& dst);
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bool init();
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const mac_addr& get_mac();
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frame_cb_handle add_frame_callback(frame_callback cb);
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void remove_frame_callback(frame_cb_handle h);
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void poll(std::span<uint8_t> tx);
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void send_raw(std::span<const uint8_t> data);
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void register_ethertype(uint16_t ethertype_be, ethertype_handler fn);
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void register_mac_filter(mac_filter fn);
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} // namespace eth
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