Implemented drone application settings - .ini format on all platforms; settings read at startup, not saved back. In other words, user needs to hand write settings in the .ini file. Currently, the only setting implemented is a portlist filter as include/exclude lists of patterns

server/drone_main.cpp

@@ -20,10 +20,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "drone.h"
 
 #include "../common/protocolmanager.h"
+#include "settings.h"
 
 #include <google/protobuf/stubs/common.h>
 
 #include <QCoreApplication>
+#include <QFile>
 
 #ifdef Q_OS_UNIX
 #include <signal.h>
@@ -33,6 +35,7 @@ extern ProtocolManager *OstProtocolManager;
 extern char *version;
 extern char *revision;
 
+QSettings *appSettings;
 int myport;
 
 void cleanup(int /*signum*/)
@@ -44,10 +47,7 @@ int main(int argc, char *argv[])
 {
     int exitCode = 0;
     QCoreApplication app(argc, argv);
-    Drone *drone = new Drone();
-    OstProtocolManager = new ProtocolManager();
-
-    app.setApplicationName(drone->objectName());
+    Drone *drone;
 
     // TODO: command line options
     // -v (--version)
@@ -56,6 +56,28 @@ int main(int argc, char *argv[])
     if (argc > 1)
         myport = atoi(argv[1]);
 
+    app.setApplicationName("Drone");
+    app.setOrganizationName("Ostinato");
+
+    /* (Portable Mode) If we have a .ini file in the same directory as the 
+       executable, we use that instead of the platform specific location
+       and format for the settings */
+    QString portableIni = QCoreApplication::applicationDirPath() 
+            + "/drone.ini";
+    if (QFile::exists(portableIni))
+        appSettings = new QSettings(portableIni, QSettings::IniFormat);
+    else
+        appSettings = new QSettings(QSettings::IniFormat, 
+                                    QSettings::UserScope,
+                                    app.organizationName(), 
+                                    app.applicationName().toLower());
+
+    if (QFile::exists(appSettings->fileName()))
+        qDebug("Read settings from %s", qPrintable(appSettings->fileName()));
+
+    drone = new Drone();
+    OstProtocolManager = new ProtocolManager();
+
     if (!drone->init())
     {
         exitCode = -1;

server/portmanager.cpp

@@ -19,14 +19,15 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include "portmanager.h"
 
-#include <QtGlobal>
-#include <pcap.h>
-
 #include "bsdport.h"
 #include "linuxport.h"
 #include "pcapport.h"
+#include "settings.h"
 #include "winpcapport.h"
 
+#include <QStringList>
+#include <pcap.h>
+
 PortManager *PortManager::instance_ = NULL;
 
 PortManager::PortManager()
@@ -49,6 +50,18 @@ PortManager::PortManager()
         if (device->description)
             qDebug(" (%s)\n", device->description);
 
+#if defined(Q_OS_WIN32)
+        if (!filterAcceptsPort(device->description))
+#else
+        if (!filterAcceptsPort(device->name))
+#endif
+        {
+            qDebug("%s (%s) rejected by filter. Skipping!",
+                    device->name, device->description);
+            i--;
+            continue;
+        }
+
 #if defined(Q_OS_WIN32)
         port = new WinPcapPort(i, device->name);
 #elif defined(Q_OS_LINUX)
@@ -92,3 +105,40 @@ PortManager* PortManager::instance()
 
     return instance_;       
 }
+
+bool PortManager::filterAcceptsPort(const char *name)
+{
+    QRegExp pattern;
+    QStringList includeList = appSettings->value(kPortListIncludeKey)
+                                    .toStringList();
+    QStringList excludeList = appSettings->value(kPortListExcludeKey)
+                                    .toStringList();
+
+    pattern.setPatternSyntax(QRegExp::Wildcard);
+
+    // An empty (or missing) includeList accepts all ports
+    // NOTE: A blank "IncludeList=" is read as a stringlist with one
+    // string which is empty => treat it same as an empty stringlist
+    if (includeList.isEmpty()
+            || (includeList.size() == 1 && includeList.at(0).isEmpty()))
+        goto _include_pass;
+
+    foreach (QString str, includeList) {
+        pattern.setPattern(str);
+        if (pattern.exactMatch(name))
+            goto _include_pass;
+    }
+
+    // IncludeList is not empty and port did not match a pattern
+    return false;
+
+_include_pass:
+    foreach (QString str, excludeList) {
+        pattern.setPattern(str);
+        if (pattern.exactMatch(name))
+            return false;
+    }
+
+    // Port did not match a pattern in ExcludeList
+    return true;
+}

server/portmanager.h

@@ -34,6 +34,9 @@ public:
 
     static PortManager* instance();
 
+private:
+    bool filterAcceptsPort(const char *name);
+
 private:
     QList<AbstractPort*>    portList_;
 

server/settings.h

@@ -0,0 +1,34 @@
+/*
+Copyright (C) 2014 Srivats P.
+
+This file is part of "Ostinato"
+
+This 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 3 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, see <http://www.gnu.org/licenses/>
+*/
+
+#ifndef _SETTINGS_H
+#define _SETTINGS_H
+
+#include <QSettings>
+#include <QString>
+
+extern QSettings *appSettings;
+
+//
+// PortList Section Keys
+//
+const QString kPortListIncludeKey("PortList/Include");
+const QString kPortListExcludeKey("PortList/Exclude");
+
+#endif