remoteservice.cpp

00001 /* This file is part of the KDE project
00002  *
00003  * Copyright (C) 2004, 2005 Jakub Stachowski <qbast@go2.pl>
00004  *
00005  * This library is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU Library General Public
00007  * License as published by the Free Software Foundation; either
00008  * version 2 of the License, or (at your option) any later version.
00009  *
00010  * This library is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013  * Library General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU Library General Public License
00016  * along with this library; see the file COPYING.LIB.  If not, write to
00017  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00018  * Boston, MA 02110-1301, USA.
00019  */
00020 
00021 #include <config.h>
00022 
00023 #include <qeventloop.h>
00024 #include <qapplication.h>
00025 #include <kurl.h>
00026 #ifdef HAVE_SYS_TYPES_H
00027 #include <sys/types.h>
00028 #endif
00029 #include <netinet/in.h>
00030 #include <avahi-client/client.h>
00031 #include <avahi-common/strlst.h>
00032 #ifdef AVAHI_API_0_6
00033 #include <avahi-client/lookup.h>
00034 #endif
00035 #include "remoteservice.h"
00036 #include "responder.h"
00037 #include "sdevent.h"
00038 
00039 namespace DNSSD
00040 {
00041 #ifdef AVAHI_API_0_6
00042 void resolve_callback(AvahiServiceResolver*, AvahiIfIndex, AvahiProtocol proto, AvahiResolverEvent e,
00043     const char* name, const char* type, const char* domain, const char* hostname, const AvahiAddress* a,
00044     uint16_t port, AvahiStringList* txt, AvahiLookupResultFlags, void* context);
00045 #else
00046 void resolve_callback(AvahiServiceResolver*, AvahiIfIndex, AvahiProtocol proto, AvahiResolverEvent e,
00047     const char* name, const char* type, const char* domain, const char* hostname, const AvahiAddress* a,
00048     uint16_t port, AvahiStringList* txt, void* context);
00049 #endif
00050 
00051 class RemoteServicePrivate : public Responder
00052 {
00053 public:
00054     RemoteServicePrivate() :  m_resolved(false), m_running(false), m_resolver(0) {}
00055     bool m_resolved;
00056     bool m_running;
00057     AvahiServiceResolver* m_resolver;
00058     void stop() {
00059         m_running = false;
00060         if (m_resolver) avahi_service_resolver_free(m_resolver);
00061         m_resolver=0;
00062     }
00063 };
00064 
00065 RemoteService::RemoteService(const QString& label)
00066 {
00067     decode(label);
00068     d =  new RemoteServicePrivate();
00069 }
00070 RemoteService::RemoteService(const QString& name,const QString& type,const QString& domain)
00071         : ServiceBase(name, type, domain)
00072 {
00073     d = new RemoteServicePrivate();
00074 }
00075 
00076 RemoteService::RemoteService(const KURL& url)
00077 {
00078     d = new RemoteServicePrivate();
00079     if (!url.isValid()) return;
00080     if (url.protocol()!="invitation") return;
00081     if (!url.hasPath()) return;
00082     m_hostName = url.host();
00083     m_port = url.port();
00084     m_type = url.path().section('/',1,1);
00085     m_serviceName = url.path().section('/',2);
00086     m_textData = url.queryItems();
00087     d->m_resolved=true;
00088 }
00089 
00090 RemoteService::~RemoteService()
00091 {
00092     if (d->m_resolver) avahi_service_resolver_free(d->m_resolver);
00093     delete d;
00094 }
00095 
00096 bool RemoteService::resolve()
00097 {
00098     resolveAsync();
00099     while (d->m_running && !d->m_resolved) Responder::self().process();
00100     d->stop();
00101     return d->m_resolved;
00102 }
00103 
00104 void RemoteService::resolveAsync()
00105 {
00106     if (d->m_running) return;
00107     d->m_resolved = false;
00108     // FIXME: first protocol should be set?
00109 #ifdef AVAHI_API_0_6
00110     d->m_resolver = avahi_service_resolver_new(Responder::self().client(),AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
00111         m_serviceName.utf8(), m_type.ascii(), domainToDNS(m_domain), AVAHI_PROTO_UNSPEC, AVAHI_LOOKUP_NO_ADDRESS,
00112         resolve_callback, this);
00113 #else
00114     d->m_resolver = avahi_service_resolver_new(Responder::self().client(),AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
00115         m_serviceName.utf8(), m_type.ascii(), m_domain.utf8(), AVAHI_PROTO_UNSPEC, resolve_callback, this);
00116 #endif
00117     if (d->m_resolver) d->m_running=true;
00118         else  emit resolved(false);
00119 }
00120 
00121 bool RemoteService::isResolved() const
00122 {
00123     return d->m_resolved;
00124 }
00125 
00126 void RemoteService::customEvent(QCustomEvent* event)
00127 {
00128     if (event->type() == QEvent::User+SD_ERROR) {
00129         d->stop();
00130         d->m_resolved=false;
00131         emit resolved(false);
00132     }
00133     if (event->type() == QEvent::User+SD_RESOLVE) {
00134         ResolveEvent* rev = static_cast<ResolveEvent*>(event);
00135         m_hostName = rev->m_hostname;
00136         m_port = rev->m_port;
00137         m_textData = rev->m_txtdata;
00138         d->m_resolved = true;
00139         emit resolved(true);
00140     }
00141 }
00142 
00143 void RemoteService::virtual_hook(int, void*)
00144 {
00145     // BASE::virtual_hook(int, void*);
00146 }
00147 
00148 QDataStream & operator<< (QDataStream & s, const RemoteService & a)
00149 {
00150     s << (static_cast<ServiceBase>(a));
00151     Q_INT8 resolved = a.d->m_resolved ? 1:0;
00152     s << resolved;
00153     return s;
00154 }
00155 
00156 QDataStream & operator>> (QDataStream & s, RemoteService & a)
00157 {
00158     // stop any possible resolve going on
00159     a.d->stop();
00160     Q_INT8 resolved;
00161     operator>>(s,(static_cast<ServiceBase&>(a)));
00162     s >> resolved;
00163     a.d->m_resolved = (resolved == 1);  
00164     return s;
00165 }
00166 
00167 #ifdef AVAHI_API_0_6
00168 void resolve_callback(AvahiServiceResolver*, AvahiIfIndex, AvahiProtocol, AvahiResolverEvent e,
00169     const char*, const char*, const char*, const char* hostname, const AvahiAddress*,
00170     uint16_t port, AvahiStringList* txt, AvahiLookupResultFlags, void* context)
00171 #else
00172 void resolve_callback(AvahiServiceResolver*, AvahiIfIndex, AvahiProtocol, AvahiResolverEvent e,
00173     const char*, const char*, const char*, const char* hostname, const AvahiAddress*,
00174     uint16_t port, AvahiStringList* txt, void* context)
00175 #endif
00176 {
00177     QObject *obj = reinterpret_cast<QObject*>(context);
00178     if (e != AVAHI_RESOLVER_FOUND) {
00179         ErrorEvent err;
00180         QApplication::sendEvent(obj, &err); 
00181         return;
00182     }
00183     QMap<QString,QString> map;
00184     while (txt) {
00185         char *key, *value;
00186         size_t size;
00187         if (avahi_string_list_get_pair(txt,&key,&value,&size)) break;
00188         map[QString::fromUtf8(key)]=(value) ? QString::fromUtf8(value) : QString::null;
00189         txt = txt->next;
00190     }
00191     ResolveEvent rev(DNSToDomain(hostname),port,map);
00192     QApplication::sendEvent(obj, &rev);
00193 }
00194 
00195 
00196 }
00197 
00198 #include "remoteservice.moc"
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