mpd/src/ZeroconfBonjour.cxx

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/*
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* Copyright (C) 2003-2013 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 "config.h"
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#include "ZeroconfBonjour.hxx"
#include "ZeroconfInternal.hxx"
#include "Listen.hxx"
#include "event/SocketMonitor.hxx"
#include "util/Domain.hxx"
#include "Log.hxx"
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#include "Compiler.h"
#include <glib.h>
#include <dns_sd.h>
static constexpr Domain bonjour_domain("bonjour");
class BonjourMonitor final : public SocketMonitor {
DNSServiceRef service_ref;
public:
BonjourMonitor(EventLoop &_loop, DNSServiceRef _service_ref)
:SocketMonitor(DNSServiceRefSockFD(_service_ref), _loop),
service_ref(_service_ref) {
ScheduleRead();
}
~BonjourMonitor() {
Steal();
DNSServiceRefDeallocate(service_ref);
}
protected:
virtual bool OnSocketReady(gcc_unused unsigned flags) override {
DNSServiceProcessResult(service_ref);
return false;
}
};
static BonjourMonitor *bonjour_monitor;
static void
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dnsRegisterCallback(gcc_unused DNSServiceRef sdRef,
gcc_unused DNSServiceFlags flags,
DNSServiceErrorType errorCode, const char *name,
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gcc_unused const char *regtype,
gcc_unused const char *domain,
gcc_unused void *context)
{
if (errorCode != kDNSServiceErr_NoError) {
LogError(bonjour_domain,
"Failed to register zeroconf service");
bonjour_monitor->Cancel();
} else {
FormatDebug(bonjour_domain,
"Registered zeroconf service with name '%s'",
name);
}
}
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void
BonjourInit(EventLoop &loop, const char *service_name)
{
DNSServiceRef dnsReference;
DNSServiceErrorType error = DNSServiceRegister(&dnsReference,
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0, 0, service_name,
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SERVICE_TYPE, nullptr, nullptr,
g_htons(listen_port), 0,
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nullptr,
dnsRegisterCallback,
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nullptr);
if (error != kDNSServiceErr_NoError) {
LogError(bonjour_domain,
"Failed to register zeroconf service");
if (dnsReference) {
DNSServiceRefDeallocate(dnsReference);
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dnsReference = nullptr;
}
return;
}
bonjour_monitor = new BonjourMonitor(loop, dnsReference);
}
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void
BonjourDeinit()
{
delete bonjour_monitor;
}