summaryrefslogtreecommitdiffstats
path: root/kio/misc/kpac/discovery.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'kio/misc/kpac/discovery.cpp')
-rw-r--r--kio/misc/kpac/discovery.cpp147
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