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https://github.com/MrLowPr/overdrive.git
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39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
// Copyright (C) 2026 half144 and PS5 React contributors
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// SPDX-License-Identifier: GPL-3.0-or-later
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// Additional attribution term: see LICENSE-ATTRIBUTION.
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// UDP broadcast queries on the local network (service discovery: "who is JellyfinServer?" to 7359,
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// which every server answers). Each query runs on a worker of its own for a bounded time; the render
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// thread only submits, cancels and polls.
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <string>
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#include <vector>
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namespace lan {
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inline constexpr std::size_t kMaxMessageBytes = 1024, kMaxReplyBytes = 4096;
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inline constexpr unsigned kMaxReplies = 64, kMaxTasks = 4;
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inline constexpr int kMinTimeoutMs = 100, kMaxTimeoutMs = 10000;
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struct Reply {
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std::string address; // the sender's IPv4 address, dotted
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std::uint16_t port = 0;
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std::string body;
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};
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struct Snapshot {
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std::uint32_t id = 0;
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std::string state, error; // 'completed' | 'failed' | 'cancelled'
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std::vector<Reply> replies;
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};
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// Sends `message` to 255.255.255.255:`port` and gathers replies for `timeout_ms` or until
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// `max_replies`. 0 with `error` set when it cannot start.
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std::uint32_t broadcast(std::uint16_t port, std::string message, int timeout_ms, unsigned max_replies,
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std::string& error);
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void cancel(std::uint32_t id);
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// Finished queries since the last poll.
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std::vector<Snapshot> poll();
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// Cancels running queries and joins their workers.
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void stop();
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} // namespace lan
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