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/*
* Copyright (c) 2010-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/LinkLocal/LinkLocalServiceBrowser.h>
#include <iostream>
#include <boost/bind.hpp>
#include <Swiften/LinkLocal/DNSSD/DNSSDBrowseQuery.h>
#include <Swiften/Network/HostAddress.h>
namespace Swift {
LinkLocalServiceBrowser::LinkLocalServiceBrowser(std::shared_ptr<DNSSDQuerier> querier) : querier(querier), haveError(false) {
}
LinkLocalServiceBrowser::~LinkLocalServiceBrowser() {
if (isRunning()) {
std::cerr << "WARNING: LinkLocalServiceBrowser still running on destruction" << std::endl;
}
}
void LinkLocalServiceBrowser::start() {
assert(!isRunning());
haveError = false;
browseQuery = querier->createBrowseQuery();
browseQuery->onServiceAdded.connect(
boost::bind(&LinkLocalServiceBrowser::handleServiceAdded, this, _1));
browseQuery->onServiceRemoved.connect(
boost::bind(&LinkLocalServiceBrowser::handleServiceRemoved, this, _1));
browseQuery->onError.connect(
boost::bind(&LinkLocalServiceBrowser::handleBrowseError, this));
browseQuery->startBrowsing();
}
void LinkLocalServiceBrowser::stop() {
assert(isRunning());
if (isRegistered()) {
unregisterService();
}
for (ResolveQueryMap::const_iterator i = resolveQueries.begin(); i != resolveQueries.end(); ++i) {
i->second->stop();
}
resolveQueries.clear();
services.clear();
browseQuery->stopBrowsing();
browseQuery.reset();
onStopped(haveError);
}
bool LinkLocalServiceBrowser::isRunning() const {
return !!browseQuery;
}
bool LinkLocalServiceBrowser::hasError() const {
return haveError;
}
bool LinkLocalServiceBrowser::isRegistered() const {
return !!registerQuery;
}
void LinkLocalServiceBrowser::registerService(const std::string& name, unsigned short port, const LinkLocalServiceInfo& info) {
assert(!registerQuery);
if (auto txtRecord = info.toTXTRecord()) {
registerQuery = querier->createRegisterQuery(name, port, *txtRecord);
registerQuery->onRegisterFinished.connect(
boost::bind(&LinkLocalServiceBrowser::handleRegisterFinished, this, _1));
registerQuery->registerService();
}
else {
haveError = true;
stop();
}
}
void LinkLocalServiceBrowser::updateService(const LinkLocalServiceInfo& info) {
assert(registerQuery);
if (auto txtRecord = info.toTXTRecord()) {
registerQuery->updateServiceInfo(*txtRecord);
}
else {
haveError = true;
stop();
}
}
void LinkLocalServiceBrowser::unregisterService() {
assert(registerQuery);
registerQuery->unregisterService();
registerQuery.reset();
selfService.reset();
}
std::vector<LinkLocalService> LinkLocalServiceBrowser::getServices() const {
std::vector<LinkLocalService> result;
for (const auto& service : services) {
result.push_back(LinkLocalService(service.first, service.second));
}
return result;
}
void LinkLocalServiceBrowser::handleServiceAdded(const DNSSDServiceID& service) {
if (selfService && service == *selfService) {
return;
}
std::pair<ResolveQueryMap::iterator, bool> r = resolveQueries.insert(std::make_pair(service, std::shared_ptr<DNSSDResolveServiceQuery>()));
if (r.second) {
// There was no existing query yet. Start a new query.
std::shared_ptr<DNSSDResolveServiceQuery> resolveQuery = querier->createResolveServiceQuery(service);
resolveQuery->onServiceResolved.connect(
boost::bind(&LinkLocalServiceBrowser::handleServiceResolved, this, service, _1));
r.first->second = resolveQuery;
resolveQuery->start();
}
}
void LinkLocalServiceBrowser::handleServiceRemoved(const DNSSDServiceID& service) {
ResolveQueryMap::iterator i = resolveQueries.find(service);
if (i == resolveQueries.end()) {
// Can happen after an unregister(), when getting the old 'self'
// service remove notification.
return;
}
i->second->stop();
resolveQueries.erase(i);
ServiceMap::iterator j = services.find(service);
assert(j != services.end());
LinkLocalService linkLocalService(j->first, j->second);
services.erase(j);
onServiceRemoved(linkLocalService);
}
void LinkLocalServiceBrowser::handleServiceResolved(const DNSSDServiceID& service, const boost::optional<DNSSDResolveServiceQuery::Result>& result) {
if (result) {
std::pair<ServiceMap::iterator, bool> r = services.insert(std::make_pair(service, *result));
if (r.second) {
onServiceAdded(LinkLocalService(r.first->first, r.first->second));
}
else {
r.first->second = *result;
onServiceChanged(LinkLocalService(r.first->first, r.first->second));
}
}
}
void LinkLocalServiceBrowser::handleRegisterFinished(const boost::optional<DNSSDServiceID>& result) {
if (result) {
selfService = result;
onServiceRegistered(*result);
}
else {
haveError = true;
stop();
}
}
void LinkLocalServiceBrowser::handleBrowseError() {
haveError = true;
stop();
}
}
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Swift