140 lines
3.4 KiB
C++
140 lines
3.4 KiB
C++
/*
|
|
* Copyright 2007-2021 CM4all GmbH
|
|
* All rights reserved.
|
|
*
|
|
* author: Max Kellermann <mk@cm4all.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "Client.hxx"
|
|
#include "ConnectionListener.hxx"
|
|
#include "ErrorHandler.hxx"
|
|
#include "Error.hxx"
|
|
|
|
#include <avahi-common/error.h>
|
|
|
|
#include <cassert>
|
|
|
|
namespace Avahi {
|
|
|
|
Client::Client(EventLoop &event_loop, ErrorHandler &_error_handler) noexcept
|
|
:error_handler(_error_handler),
|
|
reconnect_timer(event_loop, BIND_THIS_METHOD(OnReconnectTimer)),
|
|
poll(event_loop)
|
|
{
|
|
reconnect_timer.Schedule({});
|
|
}
|
|
|
|
Client::~Client() noexcept
|
|
{
|
|
Close();
|
|
}
|
|
|
|
void
|
|
Client::Close() noexcept
|
|
{
|
|
if (client != nullptr) {
|
|
for (auto *l : listeners)
|
|
l->OnAvahiDisconnect();
|
|
|
|
avahi_client_free(client);
|
|
client = nullptr;
|
|
}
|
|
|
|
reconnect_timer.Cancel();
|
|
}
|
|
|
|
void
|
|
Client::ClientCallback(AvahiClient *c, AvahiClientState state) noexcept
|
|
{
|
|
int error;
|
|
|
|
switch (state) {
|
|
case AVAHI_CLIENT_S_RUNNING:
|
|
for (auto *l : listeners)
|
|
l->OnAvahiConnect(c);
|
|
|
|
break;
|
|
|
|
case AVAHI_CLIENT_FAILURE:
|
|
error = avahi_client_errno(c);
|
|
if (error == AVAHI_ERR_DISCONNECTED) {
|
|
Close();
|
|
|
|
reconnect_timer.Schedule(std::chrono::seconds(10));
|
|
} else {
|
|
if (!error_handler.OnAvahiError(std::make_exception_ptr(MakeError(error,
|
|
"Avahi connection error"))))
|
|
return;
|
|
|
|
reconnect_timer.Schedule(std::chrono::minutes(1));
|
|
}
|
|
|
|
for (auto *l : listeners)
|
|
l->OnAvahiDisconnect();
|
|
|
|
break;
|
|
|
|
case AVAHI_CLIENT_S_COLLISION:
|
|
case AVAHI_CLIENT_S_REGISTERING:
|
|
for (auto *l : listeners)
|
|
l->OnAvahiChanged();
|
|
|
|
break;
|
|
|
|
case AVAHI_CLIENT_CONNECTING:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
Client::ClientCallback(AvahiClient *c, AvahiClientState state,
|
|
void *userdata) noexcept
|
|
{
|
|
auto &client = *(Client *)userdata;
|
|
client.ClientCallback(c, state);
|
|
}
|
|
|
|
void
|
|
Client::OnReconnectTimer() noexcept
|
|
{
|
|
int error;
|
|
client = avahi_client_new(&poll, AVAHI_CLIENT_NO_FAIL,
|
|
ClientCallback, this,
|
|
&error);
|
|
if (client == nullptr) {
|
|
if (!error_handler.OnAvahiError(std::make_exception_ptr(MakeError(error,
|
|
"Failed to create Avahi client"))))
|
|
return;
|
|
|
|
reconnect_timer.Schedule(std::chrono::minutes(1));
|
|
return;
|
|
}
|
|
}
|
|
|
|
} // namespace Avahi
|