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tdelibs/dnssd/publicservice.cpp

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/* This file is part of the KDE project
*
* Copyright (C) 2004, 2005 Jakub Stachowski <qbast@go2.pl>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "publicservice.h"
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <netinet/in.h>
#include <sys/socket.h>
#include <tqapplication.h>
#include <network/ksocketaddress.h>
#include <kurl.h>
#include <unistd.h>
#ifdef HAVE_DNSSD
#include <avahi-client/client.h>
#ifdef AVAHI_API_0_6
#include <avahi-client/publish.h>
#endif
#include <avahi-common/alternative.h>
#include <avahi-common/strlst.h>
#endif
#include "sdevent.h"
#include "responder.h"
#include "servicebrowser.h"
#include "settings.h"
namespace DNSSD
{
static unsigned long publicIP();
#ifdef HAVE_DNSSD
void publish_callback (AvahiEntryGroup*, AvahiEntryGroupState s, void *context);
#endif
class PublicServicePrivate
{
public:
PublicServicePrivate() : m_published(false), m_running(false), m_collision(false)
#ifdef HAVE_DNSSD
, m_group(0)
#endif
{}
bool m_published;
bool m_running;
bool m_collision;
#ifdef HAVE_DNSSD
AvahiEntryGroup* m_group;
#endif
void commit()
{
#ifdef HAVE_DNSSD
if (!m_collision) avahi_entry_group_commit(m_group);
#endif
}
};
PublicService::PublicService(const TQString& name, const TQString& type, unsigned int port,
const TQString& domain)
: TQObject(), ServiceBase(name, type, TQString::null, domain, port)
{
d = new PublicServicePrivate;
#ifdef HAVE_DNSSD
if (Responder::self().client()) {
d->m_group = avahi_entry_group_new(Responder::self().client(), publish_callback,this);
connect(&Responder::self(),TQT_SIGNAL(stateChanged(AvahiClientState)),this,TQT_SLOT(clientState(AvahiClientState)));
}
#endif
if (domain.isNull())
if (Configuration::publishType()==Configuration::EnumPublishType::LAN) m_domain="local.";
else m_domain=Configuration::publishDomain();
}
PublicService::~PublicService()
{
#ifdef HAVE_DNSSD
if (d->m_group) avahi_entry_group_free(d->m_group);
#endif
delete d;
}
void PublicService::tryApply()
{
if (fillEntryGroup()) d->commit();
else {
stop();
emit published(false);
}
}
void PublicService::setServiceName(const TQString& serviceName)
{
m_serviceName = serviceName;
#ifdef HAVE_DNSSD
if (d->m_running) {
avahi_entry_group_reset(d->m_group);
tryApply();
}
#endif
}
void PublicService::setDomain(const TQString& domain)
{
m_domain = domain;
#ifdef HAVE_DNSSD
if (d->m_running) {
avahi_entry_group_reset(d->m_group);
tryApply();
}
#endif
}
void PublicService::setType(const TQString& type)
{
m_type = type;
#ifdef HAVE_DNSSD
if (d->m_running) {
avahi_entry_group_reset(d->m_group);
tryApply();
}
#endif
}
void PublicService::setPort(unsigned short port)
{
m_port = port;
#ifdef HAVE_DNSSD
if (d->m_running) {
avahi_entry_group_reset(d->m_group);
tryApply();
}
#endif
}
void PublicService::setTextData(const TQMap<TQString,TQString>& textData)
{
m_textData = textData;
#ifdef HAVE_DNSSD
if (d->m_running) {
avahi_entry_group_reset(d->m_group);
tryApply();
}
#endif
}
bool PublicService::isPublished() const
{
return d->m_published;
}
bool PublicService::publish()
{
publishAsync();
while (d->m_running && !d->m_published) Responder::self().process();
return d->m_published;
}
void PublicService::stop()
{
#ifdef HAVE_DNSSD
if (d->m_group) avahi_entry_group_reset(d->m_group);
#endif
d->m_published = false;
}
bool PublicService::fillEntryGroup()
{
#ifdef HAVE_DNSSD
AvahiStringList *s=0;
TQMap<TQString,TQString>::ConstIterator itEnd = m_textData.end();
for (TQMap<TQString,TQString>::ConstIterator it = m_textData.begin(); it!=itEnd ; ++it)
s = avahi_string_list_add_pair(s, it.key().utf8(),it.data().utf8());
#ifdef AVAHI_API_0_6
bool res = (!avahi_entry_group_add_service_strlst(d->m_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, (AvahiPublishFlags)0,
m_serviceName.isNull() ? avahi_client_get_host_name(Responder::self().client()) : m_serviceName.utf8().data(),
m_type.ascii(),domainToDNS(m_domain),m_hostName.utf8(),m_port,s));
#else
bool res = (!avahi_entry_group_add_service_strlst(d->m_group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
m_serviceName.isNull() ? avahi_client_get_host_name(Responder::self().client()) : m_serviceName.utf8().data(),
m_type.ascii(),m_domain.utf8(),m_hostName.utf8(),m_port,s));
#endif
avahi_string_list_free(s);
return res;
#else
return FALSE;
#endif
}
void PublicService::clientState(AvahiClientState s)
{
if (!d->m_running) return;
#ifdef HAVE_DNSSD
switch (s) {
#ifdef AVAHI_API_0_6
case AVAHI_CLIENT_FAILURE:
#else
case AVAHI_CLIENT_S_INVALID:
case AVAHI_CLIENT_DISCONNECTED:
#endif
stop();
emit published(false);
break;
case AVAHI_CLIENT_S_REGISTERING:
case AVAHI_CLIENT_S_COLLISION:
avahi_entry_group_reset(d->m_group);
d->m_collision=true;
break;
case AVAHI_CLIENT_S_RUNNING:
if (d->m_collision) {
d->m_collision=false;
tryApply();
}
}
#endif
}
void PublicService::publishAsync()
{
if (d->m_running) stop();
#ifdef HAVE_DNSSD
if (!d->m_group) {
emit published(false);
return;
}
AvahiClientState s=Responder::self().state();
#endif
d->m_running=true;
d->m_collision=true; // make it look like server is getting out of collision to force registering
#ifdef HAVE_DNSSD
clientState(s);
#endif
}
#ifdef HAVE_DNSSD
void publish_callback (AvahiEntryGroup*, AvahiEntryGroupState s, void *context)
{
TQObject *obj = reinterpret_cast<TQObject*>(context);
if (s!=AVAHI_ENTRY_GROUP_ESTABLISHED && s!=AVAHI_ENTRY_GROUP_COLLISION) return;
PublishEvent* pev=new PublishEvent(s==AVAHI_ENTRY_GROUP_ESTABLISHED);
TQApplication::postEvent(obj, pev);
}
#endif
const KURL PublicService::toInvitation(const TQString& host)
{
KURL url;
url.setProtocol("invitation");
if (host.isEmpty()) { // select best address
unsigned long s_address = publicIP();
if (!s_address) return KURL();
KNetwork::KIpAddress addr(s_address);
url.setHost(addr.toString());
} else url.setHost(host);
//FIXME: if there is no public interface, select any non-loopback
url.setPort(m_port);
url.setPath("/"+m_type+"/"+KURL::encode_string(m_serviceName));
TQString query;
TQMap<TQString,TQString>::ConstIterator itEnd = m_textData.end();
for (TQMap<TQString,TQString>::ConstIterator it = m_textData.begin(); it!=itEnd ; ++it)
url.addQueryItem(it.key(),it.data());;
return url;
}
void PublicService::customEvent(TQCustomEvent* event)
{
#ifdef HAVE_DNSSD
if (event->type()==TQEvent::User+SD_PUBLISH) {
if (!static_cast<PublishEvent*>(event)->m_ok) {
setServiceName(TQString::fromUtf8(avahi_alternative_service_name(m_serviceName.utf8())));
return;
}
d->m_published=true;
emit published(true);
}
#endif
}
void PublicService::virtual_hook(int, void*)
{
}
static unsigned long publicIP()
{
struct sockaddr_in addr;
socklen_t len = sizeof(addr);
int sock = socket(AF_INET,SOCK_DGRAM,0);
if (sock == -1) return 0;
addr.sin_family = AF_INET;
addr.sin_port = 1; // Not important, any port and public address will do
addr.sin_addr.s_addr = 0x11111111;
if ((connect(sock,(const struct sockaddr*)&addr,sizeof(addr))) == -1) { close(sock); return 0; }
if ((getsockname(sock,(struct sockaddr*)&addr, &len)) == -1) { close(sock); return 0; }
::close(sock);
return addr.sin_addr.s_addr;
}
}
#include "publicservice.moc"