1 files changed, 147 insertions, 0 deletions
diff --git a/kio/misc/kpac/discovery.cpp b/kio/misc/kpac/discovery.cpp
new file mode 100644
index 000000000..06709241b
--- /dev/null
+++ b/kio/misc/kpac/discovery.cpp
@@ -0,0 +1,147 @@
+/*
+   Copyright (c) 2003 Malte Starostik <malte@kde.org>
+
+   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 <netdb.h>
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#include <arpa/nameser.h>
+#ifdef HAVE_ARPA_NAMESER8_COMPAT_H
+#include <arpa/nameser8_compat.h>
+#endif
+#ifdef HAVE_SYS_PARAM_H
+// Basically, the BSDs need this before resolv.h
+#include <sys/param.h>
+#endif
+#include <resolv.h>
+#include <sys/utsname.h>
+
+#include <qtimer.h>
+
+#include <klocale.h>
+#include <kprocio.h>
+#include <kurl.h>
+
+#include "discovery.moc"
+
+namespace KPAC
+{
+    Discovery::Discovery( QObject* parent )
+        : Downloader( parent ),
+          m_helper( new KProcIO )
+    {
+        connect( m_helper, SIGNAL( readReady( KProcIO* ) ), SLOT( helperOutput() ) );
+        connect( m_helper, SIGNAL( processExited( KProcess* ) ), SLOT( failed() ) );
+        *m_helper << "kpac_dhcp_helper";
+
+        if ( !m_helper->start() )
+            QTimer::singleShot( 0, this, SLOT( failed() ) );
+    }
+
+    bool Discovery::initHostName()
+    {
+        struct utsname uts;
+
+        if (uname (&uts) > -1)
+        {
+            struct hostent *hent = gethostbyname (uts.nodename);
+            if (hent != 0)
+                m_hostname = QString::fromLocal8Bit( hent->h_name );
+        }
+
+        // If no hostname, try gethostname as a last resort.
+        if (m_hostname.isEmpty())
+        {
+            char buf [256];
+            if (gethostname (buf, sizeof(buf)) == 0)
+            {
+                buf[255] = '\0';
+                m_hostname = QString::fromLocal8Bit( buf );
+            }
+        }
+        return !m_hostname.isEmpty();
+    }
+
+    bool Discovery::checkDomain() const
+    {
+        // If a domain has a SOA record, don't traverse any higher.
+        // Returns true if no SOA can be found (domain is "ok" to use)
+        // Stick to old resolver interface for portability reasons.
+        union
+        {
+            HEADER header;
+            unsigned char buf[ PACKETSZ ];
+        } response;
+        int len = res_query( m_hostname.local8Bit(), C_IN, T_SOA,
+                             response.buf, sizeof( response.buf ) );
+        if ( len <= int( sizeof( response.header ) ) ||
+             ntohs( response.header.ancount ) != 1 ) return true;
+        unsigned char* pos = response.buf + sizeof( response.header );
+        unsigned char* end = response.buf + len;
+        // skip query section
+        pos += dn_skipname( pos, end ) + QFIXEDSZ;
+        if ( pos >= end ) return true;
+        // skip answer domain
+        pos += dn_skipname( pos, end );
+        short type;
+        GETSHORT( type, pos );
+        return type != T_SOA;
+    }
+
+    void Discovery::failed()
+    {
+        setError( i18n( "Could not find a usable proxy configuration script" ) );
+
+        // If this is the first DNS query, initialize our host name or abort
+        // on failure. Otherwise abort if the current domain (which was already
+        // queried for a host called "wpad" contains a SOA record)
+        bool firstQuery = m_hostname.isEmpty();
+        if ( ( firstQuery && !initHostName() ) ||
+             ( !firstQuery && !checkDomain() ) )
+        {
+            emit result( false );
+            return;
+        }
+
+        int dot = m_hostname.find( '.' );
+        if ( dot >= 0 )
+        {
+            m_hostname.remove( 0, dot + 1 ); // remove one domain level
+            download( KURL( "http://wpad." + m_hostname + "./wpad.dat" ) );
+        }
+        else emit result( false );
+    }
+
+    void Discovery::helperOutput()
+    {
+        m_helper->disconnect( this );
+        QString line;
+        m_helper->readln( line );
+        download( KURL( line.stripWhiteSpace() ) );
+    }
+}
+
+// vim: ts=4 sw=4 et