77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "Bonjour.hxx"
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#include "util/Domain.hxx"
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#include "Log.hxx"
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#include <dns_sd.h>
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#include <stdexcept>
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#include <arpa/inet.h>
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static constexpr Domain bonjour_domain("bonjour");
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/**
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* A wrapper for DNSServiceRegister() which returns the DNSServiceRef
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* and throws on error.
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*/
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static DNSServiceRef
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RegisterBonjour(const char *name, const char *type, unsigned port,
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DNSServiceRegisterReply callback, void *ctx)
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{
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DNSServiceRef ref;
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DNSServiceErrorType error = DNSServiceRegister(&ref,
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0, 0, name, type,
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nullptr, nullptr,
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htons(port), 0,
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nullptr,
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callback, ctx);
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if (error != kDNSServiceErr_NoError)
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throw std::runtime_error("DNSServiceRegister() failed");
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return ref;
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}
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BonjourHelper::BonjourHelper(EventLoop &_loop, const char *name,
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const char *service_type, unsigned port)
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:service_ref(RegisterBonjour(name, service_type, port,
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Callback, this)),
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socket_event(_loop,
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BIND_THIS_METHOD(OnSocketReady),
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SocketDescriptor(DNSServiceRefSockFD(service_ref)))
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{
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socket_event.ScheduleRead();
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}
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void
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BonjourHelper::Callback([[maybe_unused]] DNSServiceRef sdRef,
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[[maybe_unused]] DNSServiceFlags flags,
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DNSServiceErrorType errorCode, const char *name,
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[[maybe_unused]] const char *regtype,
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[[maybe_unused]] const char *domain,
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[[maybe_unused]] void *context) noexcept
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{
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auto &helper = *(BonjourHelper *)context;
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if (errorCode != kDNSServiceErr_NoError) {
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LogError(bonjour_domain,
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"Failed to register zeroconf service");
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helper.Cancel();
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} else {
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FmtDebug(bonjour_domain,
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"Registered zeroconf service with name {:?}",
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name);
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}
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}
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std::unique_ptr<BonjourHelper>
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BonjourInit(EventLoop &loop, const char *name,
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const char *service_type, unsigned port)
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{
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return std::make_unique<BonjourHelper>(loop, name, service_type, port);
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}
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