94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
/*
|
|
* Copyright 2003-2022 The Music Player Daemon Project
|
|
* http://www.musicpd.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "Bonjour.hxx"
|
|
#include "util/Domain.hxx"
|
|
#include "Log.hxx"
|
|
#include "util/Compiler.h"
|
|
|
|
#include <dns_sd.h>
|
|
|
|
#include <stdexcept>
|
|
|
|
#include <arpa/inet.h>
|
|
|
|
static constexpr Domain bonjour_domain("bonjour");
|
|
|
|
/**
|
|
* A wrapper for DNSServiceRegister() which returns the DNSServiceRef
|
|
* and throws on error.
|
|
*/
|
|
static DNSServiceRef
|
|
RegisterBonjour(const char *name, const char *type, unsigned port,
|
|
DNSServiceRegisterReply callback, void *ctx)
|
|
{
|
|
DNSServiceRef ref;
|
|
DNSServiceErrorType error = DNSServiceRegister(&ref,
|
|
0, 0, name, type,
|
|
nullptr, nullptr,
|
|
htons(port), 0,
|
|
nullptr,
|
|
callback, ctx);
|
|
|
|
if (error != kDNSServiceErr_NoError)
|
|
throw std::runtime_error("DNSServiceRegister() failed");
|
|
|
|
return ref;
|
|
}
|
|
|
|
BonjourHelper::BonjourHelper(EventLoop &_loop, const char *name,
|
|
const char *service_type, unsigned port)
|
|
:service_ref(RegisterBonjour(name, service_type, port,
|
|
Callback, this)),
|
|
socket_event(_loop,
|
|
BIND_THIS_METHOD(OnSocketReady),
|
|
SocketDescriptor(DNSServiceRefSockFD(service_ref)))
|
|
{
|
|
socket_event.ScheduleRead();
|
|
}
|
|
|
|
void
|
|
BonjourHelper::Callback([[maybe_unused]] DNSServiceRef sdRef,
|
|
[[maybe_unused]] DNSServiceFlags flags,
|
|
DNSServiceErrorType errorCode, const char *name,
|
|
[[maybe_unused]] const char *regtype,
|
|
[[maybe_unused]] const char *domain,
|
|
[[maybe_unused]] void *context) noexcept
|
|
{
|
|
auto &helper = *(BonjourHelper *)context;
|
|
|
|
if (errorCode != kDNSServiceErr_NoError) {
|
|
LogError(bonjour_domain,
|
|
"Failed to register zeroconf service");
|
|
|
|
helper.Cancel();
|
|
} else {
|
|
FmtDebug(bonjour_domain,
|
|
"Registered zeroconf service with name '{}'",
|
|
name);
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<BonjourHelper>
|
|
BonjourInit(EventLoop &loop, const char *name,
|
|
const char *service_type, unsigned port)
|
|
{
|
|
return std::make_unique<BonjourHelper>(loop, name, service_type, port);
|
|
}
|