Max Kellermann
112 lines
2.1 KiB
C++
112 lines
2.1 KiB
C++
// SPDX-License-Identifier: BSD-2-Clause
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// Copyright CM4all GmbH
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// author: Max Kellermann <mk@cm4all.com>
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#include "Client.hxx"
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#include "ConnectionListener.hxx"
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#include "ErrorHandler.hxx"
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#include "Error.hxx"
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#include <avahi-common/error.h>
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#include <cassert>
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namespace Avahi {
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Client::Client(EventLoop &event_loop, ErrorHandler &_error_handler) noexcept
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:error_handler(_error_handler),
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reconnect_timer(event_loop, BIND_THIS_METHOD(OnReconnectTimer)),
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poll(event_loop)
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{
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reconnect_timer.Schedule({});
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}
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Client::~Client() noexcept
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{
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Close();
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}
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void
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Client::Close() noexcept
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{
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if (client != nullptr) {
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for (auto *l : listeners)
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l->OnAvahiDisconnect();
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avahi_client_free(client);
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client = nullptr;
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}
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reconnect_timer.Cancel();
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}
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void
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Client::ClientCallback(AvahiClient *c, AvahiClientState state) noexcept
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{
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int error;
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switch (state) {
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case AVAHI_CLIENT_S_RUNNING:
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for (auto *l : listeners)
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l->OnAvahiConnect(c);
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break;
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case AVAHI_CLIENT_FAILURE:
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error = avahi_client_errno(c);
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if (error == AVAHI_ERR_DISCONNECTED) {
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Close();
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reconnect_timer.Schedule(std::chrono::seconds(10));
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} else {
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if (!error_handler.OnAvahiError(std::make_exception_ptr(MakeError(error,
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"Avahi connection error"))))
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return;
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reconnect_timer.Schedule(std::chrono::minutes(1));
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}
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for (auto *l : listeners)
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l->OnAvahiDisconnect();
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break;
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case AVAHI_CLIENT_S_COLLISION:
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case AVAHI_CLIENT_S_REGISTERING:
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for (auto *l : listeners)
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l->OnAvahiChanged();
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break;
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case AVAHI_CLIENT_CONNECTING:
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break;
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}
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}
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void
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Client::ClientCallback(AvahiClient *c, AvahiClientState state,
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void *userdata) noexcept
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{
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auto &client = *(Client *)userdata;
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client.ClientCallback(c, state);
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}
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void
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Client::OnReconnectTimer() noexcept
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{
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int error;
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client = avahi_client_new(&poll, AVAHI_CLIENT_NO_FAIL,
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ClientCallback, this,
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&error);
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if (client == nullptr) {
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if (!error_handler.OnAvahiError(std::make_exception_ptr(MakeError(error,
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"Failed to create Avahi client"))))
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return;
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reconnect_timer.Schedule(std::chrono::minutes(1));
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return;
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}
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}
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} // namespace Avahi
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