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-rw-r--r--plugins/upnp/upnpmcastsocket.cpp312
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diff --git a/plugins/upnp/upnpmcastsocket.cpp b/plugins/upnp/upnpmcastsocket.cpp
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+/***************************************************************************
+ * Copyright (C) 2005 by Joris Guisson *
+ * [email protected] *
+ * *
+ * 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 <kurl.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <arpa/inet.h>
+#include <netinet/ip.h>
+#include <qstringlist.h>
+#include <ksocketdevice.h>
+#include <ksocketaddress.h>
+#include <util/log.h>
+#include <torrent/globals.h>
+#include <qfile.h>
+#include <qtextstream.h>
+#include "upnpmcastsocket.h"
+
+
+
+using namespace KNetwork;
+using namespace bt;
+
+namespace kt
+{
+
+ UPnPMCastSocket::UPnPMCastSocket(bool verbose) : verbose(verbose)
+ {
+ routers.setAutoDelete(true);
+ QObject::connect(this,SIGNAL(readyRead()),this,SLOT(onReadyRead()));
+ QObject::connect(this,SIGNAL(gotError(int)),this,SLOT(onError(int)));
+ setAddressReuseable(true);
+ setFamily(KNetwork::KResolver::IPv4Family);
+ setBlocking(true);
+ for (Uint32 i = 0;i < 10;i++)
+ {
+ if (!bind(QString::null,QString::number(1900 + i)))
+ Out(SYS_PNP|LOG_IMPORTANT) << "Cannot bind to UDP port 1900" << endl;
+ else
+ break;
+ }
+ setBlocking(false);
+ joinUPnPMCastGroup();
+ }
+
+
+ UPnPMCastSocket::~UPnPMCastSocket()
+ {
+ leaveUPnPMCastGroup();
+ QObject::disconnect(this,SIGNAL(readyRead()),this,SLOT(onReadyRead()));
+ QObject::disconnect(this,SIGNAL(gotError(int)),this,SLOT(onError(int)));
+ }
+
+ void UPnPMCastSocket::discover()
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Trying to find UPnP devices on the local network" << endl;
+
+ // send a HTTP M-SEARCH message to 239.255.255.250:1900
+ const char* data = "M-SEARCH * HTTP/1.1\r\n"
+ "HOST: 239.255.255.250:1900\r\n"
+ "ST:urn:schemas-upnp-org:device:InternetGatewayDevice:1\r\n"
+ "MAN:\"ssdp:discover\"\r\n"
+ "MX:3\r\n"
+ "\r\n\0";
+
+ if (verbose)
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Sending : " << endl;
+ Out(SYS_PNP|LOG_NOTICE) << data << endl;
+ }
+
+ KDatagramSocket::send(KNetwork::KDatagramPacket(data,strlen(data),KInetSocketAddress("239.255.255.250",1900)));
+ }
+
+ void UPnPMCastSocket::onXmlFileDownloaded(UPnPRouter* r,bool success)
+ {
+ if (!success)
+ {
+ // we couldn't download and parse the XML file so
+ // get rid of it
+ r->deleteLater();
+ }
+ else
+ {
+ // add it to the list and emit the signal
+ if (!routers.contains(r->getServer()))
+ {
+ routers.insert(r->getServer(),r);
+ discovered(r);
+ }
+ else
+ {
+ r->deleteLater();
+ }
+ }
+ }
+
+ void UPnPMCastSocket::onReadyRead()
+ {
+ if (bytesAvailable() == 0)
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "0 byte UDP packet " << endl;
+ // KDatagramSocket wrongly handles UDP packets with no payload
+ // so we need to deal with it oursleves
+ int fd = socketDevice()->socket();
+ char tmp;
+ read(fd,&tmp,1);
+ return;
+ }
+
+ KNetwork::KDatagramPacket p = KDatagramSocket::receive();
+ if (p.isNull())
+ return;
+
+ if (verbose)
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Received : " << endl;
+ Out(SYS_PNP|LOG_NOTICE) << QString(p.data()) << endl;
+ }
+
+ // try to make a router of it
+ UPnPRouter* r = parseResponse(p.data());
+ if (r)
+ {
+ QObject::connect(r,SIGNAL(xmlFileDownloaded( UPnPRouter*, bool )),
+ this,SLOT(onXmlFileDownloaded( UPnPRouter*, bool )));
+
+ // download it's xml file
+ r->downloadXMLFile();
+ }
+ }
+
+ UPnPRouter* UPnPMCastSocket::parseResponse(const QByteArray & arr)
+ {
+ QStringList lines = QStringList::split("\r\n",QString(arr),false);
+ QString server;
+ KURL location;
+
+ /*
+ Out(SYS_PNP|LOG_DEBUG) << "Received : " << endl;
+ for (Uint32 idx = 0;idx < lines.count(); idx++)
+ Out(SYS_PNP|LOG_DEBUG) << lines[idx] << endl;
+ */
+
+ // first read first line and see if contains a HTTP 200 OK message
+ QString line = lines.first();
+ if (!line.contains("HTTP"))
+ {
+ // it is either a 200 OK or a NOTIFY
+ if (!line.contains("NOTIFY") && !line.contains("200"))
+ return 0;
+ }
+ else if (line.contains("M-SEARCH")) // ignore M-SEARCH
+ return 0;
+
+ // quick check that the response being parsed is valid
+ bool validDevice = false;
+ for (Uint32 idx = 0;idx < lines.count() && !validDevice; idx++)
+ {
+ line = lines[idx];
+ if ((line.contains("ST:") || line.contains("NT:")) && line.contains("InternetGatewayDevice"))
+ {
+ validDevice = true;
+ }
+ }
+ if (!validDevice)
+ {
+ // Out(SYS_PNP|LOG_IMPORTANT) << "Not a valid Internet Gateway Device" << endl;
+ return 0;
+ }
+
+ // read all lines and try to find the server and location fields
+ for (Uint32 i = 1;i < lines.count();i++)
+ {
+ line = lines[i];
+ if (line.startsWith("Location") || line.startsWith("LOCATION") || line.startsWith("location"))
+ {
+ location = line.mid(line.find(':') + 1).stripWhiteSpace();
+ if (!location.isValid())
+ return 0;
+ }
+ else if (line.startsWith("Server") || line.startsWith("server") || line.startsWith("SERVER"))
+ {
+ server = line.mid(line.find(':') + 1).stripWhiteSpace();
+ if (server.length() == 0)
+ return 0;
+
+ }
+ }
+
+ if (routers.contains(server))
+ {
+ return 0;
+ }
+ else
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Detected IGD " << server << endl;
+ // everything OK, make a new UPnPRouter
+ return new UPnPRouter(server,location,verbose);
+ }
+ }
+
+ void UPnPMCastSocket::onError(int)
+ {
+ Out(SYS_PNP|LOG_IMPORTANT) << "UPnPMCastSocket Error : " << errorString() << endl;
+ }
+
+ void UPnPMCastSocket::saveRouters(const QString & file)
+ {
+ QFile fptr(file);
+ if (!fptr.open(IO_WriteOnly))
+ {
+ Out(SYS_PNP|LOG_IMPORTANT) << "Cannot open file " << file << " : " << fptr.errorString() << endl;
+ return;
+ }
+
+ // file format is simple : 2 lines per router,
+ // one containing the server, the other the location
+ QTextStream fout(&fptr);
+ bt::PtrMap<QString,UPnPRouter>::iterator i = routers.begin();
+ while (i != routers.end())
+ {
+ UPnPRouter* r = i->second;
+ fout << r->getServer() << endl;
+ fout << r->getLocation().prettyURL() << endl;
+ i++;
+ }
+ }
+
+ void UPnPMCastSocket::loadRouters(const QString & file)
+ {
+ QFile fptr(file);
+ if (!fptr.open(IO_ReadOnly))
+ {
+ Out(SYS_PNP|LOG_IMPORTANT) << "Cannot open file " << file << " : " << fptr.errorString() << endl;
+ return;
+ }
+
+ // file format is simple : 2 lines per router,
+ // one containing the server, the other the location
+ QTextStream fin(&fptr);
+
+ while (!fin.atEnd())
+ {
+ QString server, location;
+ server = fin.readLine();
+ location = fin.readLine();
+ if (!routers.contains(server))
+ {
+ UPnPRouter* r = new UPnPRouter(server,location);
+ // download it's xml file
+ QObject::connect(r,SIGNAL(xmlFileDownloaded( UPnPRouter*, bool )),this,SLOT(onXmlFileDownloaded( UPnPRouter*, bool )));
+ r->downloadXMLFile();
+ }
+ }
+ }
+
+ void UPnPMCastSocket::joinUPnPMCastGroup()
+ {
+ int fd = socketDevice()->socket();
+ struct ip_mreq mreq;
+
+ memset(&mreq,0,sizeof(struct ip_mreq));
+
+ inet_aton("239.255.255.250",&mreq.imr_multiaddr);
+ mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+
+ if (setsockopt(fd,IPPROTO_IP,IP_ADD_MEMBERSHIP,&mreq,sizeof(struct ip_mreq)) < 0)
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Failed to join multicast group 239.255.255.250" << endl;
+ }
+ }
+
+ void UPnPMCastSocket::leaveUPnPMCastGroup()
+ {
+ int fd = socketDevice()->socket();
+ struct ip_mreq mreq;
+
+ memset(&mreq,0,sizeof(struct ip_mreq));
+
+ inet_aton("239.255.255.250",&mreq.imr_multiaddr);
+ mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+
+ if (setsockopt(fd,IPPROTO_IP,IP_DROP_MEMBERSHIP,&mreq,sizeof(struct ip_mreq)) < 0)
+ {
+ Out(SYS_PNP|LOG_NOTICE) << "Failed to leave multicast group 239.255.255.250" << endl;
+ }
+ }
+}
+
+
+
+#include "upnpmcastsocket.moc"
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