BUGFIX: obtaining a network interface list via an ioctl does not always

        return all available interfaces.  Per busybox ifconfig,
        use /proc/net/dev as a preferred interface list if it exists,
        and fall back to the ioctl method if it does not.

1 files changed, 48 insertions, 31 deletions

diff --git a/noncore/settings/networksettings/mainwindowimp.cpp b/noncore/settings/networksettings/mainwindowimp.cpp
index 765b522..50131d8 100644
--- a/noncore/settings/networksettings/mainwindowimp.cpp
+++ b/noncore/settings/networksettings/mainwindowimp.cpp
@@ -39,14 +39,16 @@
 #include <qfile.h>

 #include <qtextstream.h>

 #include <qregexp.h>

 

 #include <net/if.h>

 #include <sys/ioctl.h>

+#include <sys/socket.h>

 

 #define DEFAULT_SCHEME "/var/lib/pcmcia/scheme"

+#define _PROCNETDEV "/proc/net/dev"

 

 MainWindowImp::MainWindowImp(QWidget *parent, const char *name) : MainWindow(parent, name), advancedUserMode(true), scheme(DEFAULT_SCHEME){

   connect(addConnectionButton, SIGNAL(clicked()), this, SLOT(addClicked()));

   connect(removeConnectionButton, SIGNAL(clicked()), this, SLOT(removeClicked()));

   connect(informationConnectionButton, SIGNAL(clicked()), this, SLOT(informationClicked()));

   connect(configureConnectionButton, SIGNAL(clicked()), this, SLOT(configureClicked())); 

@@ -144,44 +146,61 @@ MainWindowImp::~MainWindowImp(){
 }

 

 /**

  * Query the kernel for all of the interfaces.

  */ 

 void MainWindowImp::getAllInterfaces(){

-  int sockfd = socket(AF_INET, SOCK_DGRAM, 0);

+  int sockfd = socket(PF_INET, SOCK_DGRAM, 0);

   if(sockfd == -1)

     return;

   

-  char buf[8*1024];

+  struct ifreq ifr;

+  QStringList ifaces;

+  QFile procFile(QString(_PROCNETDEV));

+  int result;

+

+  if (! procFile.exists()) {

+    struct ifreq ifrs[100];

   struct ifconf ifc;

-  ifc.ifc_len = sizeof(buf);

-  ifc.ifc_req = (struct ifreq *) buf;

-  int result=ioctl(sockfd, SIOCGIFCONF, &ifc);

-

-  for (char* ptr = buf; ptr < buf + ifc.ifc_len; ){

-    struct ifreq *ifr =(struct ifreq *) ptr;

-    int len = sizeof(struct sockaddr);

-#ifdef  HAVE_SOCKADDR_SA_LEN

-    if (ifr->ifr_addr.sa_len > len)

-      len = ifr->ifr_addr.sa_len;    /* length > 16 */

-#endif

-    ptr += sizeof(ifr->ifr_name) + len;  /* for next one in buffer */

+    ifc.ifc_len = sizeof(ifrs);

+    ifc.ifc_req = ifrs;

+    result = ioctl(sockfd, SIOCGIFCONF, &ifc);

+    

+    for (unsigned int i = 0; i < ifc.ifc_len / sizeof(struct ifreq); i++) {

+      struct ifreq *pifr = &ifrs[i];

+  

+      ifaces += pifr->ifr_name;

+    }

+  } else {

+    procFile.open(IO_ReadOnly);

+    QString line;

+    QTextStream procTs(&procFile);

+    int loc = -1;

+

+    procTs.readLine(); // eat a line

+    procTs.readLine(); // eat a line

+    while((line = procTs.readLine().simplifyWhiteSpace()) != QString::null) {

+      if((loc = line.find(":")) != -1) {

+        ifaces += line.left(loc);

+      }

+    }

+  }

 

-    int flags;

-    struct sockaddr_in *sinptr;

+  for (QStringList::Iterator it = ifaces.begin(); it != ifaces.end(); ++it) {

+    int flags = 0, family;

     Interface *i = NULL;

-    switch (ifr->ifr_addr.sa_family){

-      case AF_INET:

-        sinptr = (struct sockaddr_in *) &ifr->ifr_addr;

-        flags=0;

+

+    strcpy(ifr.ifr_name, (*it).latin1());

+

+    qWarning("ifr.ifr_name=%s\n", ifr.ifr_name); 

 

         struct ifreq ifcopy;

-        ifcopy=*ifr;

+    ifcopy = ifr;

         result=ioctl(sockfd,SIOCGIFFLAGS,&ifcopy);

         flags=ifcopy.ifr_flags;

-        i = new Interface(this, ifr->ifr_name, false);

+    i = new Interface(this, ifr.ifr_name, false);

         i->setAttached(true);

         if ((flags & IFF_UP) == IFF_UP)

           i->setStatus(true);

         else

           i->setStatus(false);

 

@@ -193,22 +212,16 @@ void MainWindowImp::getAllInterfaces(){
           i->setHardwareName("Multicast");

         else if ((flags & IFF_LOOPBACK) == IFF_LOOPBACK)

           i->setHardwareName("Loopback");

         else

           i->setHardwareName("Unknown");

 

+    qWarning("Adding interface %s to interfaceNames\n", ifr.ifr_name);

         interfaceNames.insert(i->getInterfaceName(), i);

         updateInterface(i);

         connect(i, SIGNAL(updateInterface(Interface *)), this, SLOT(updateInterface(Interface *)));

-        break;

-

-      default:

-        qDebug(ifr->ifr_name);

-        qDebug(QString("%1").arg(ifr->ifr_addr.sa_family).latin1());

-        break;

-    }

   }

 }

 

 /**

  * Load all modules that are found in the path

  * @param path a directory that is scaned for any plugins that can be loaded

@@ -225,13 +238,17 @@ void MainWindowImp::loadModules(const QString &path){
   // Don't want sym links

   d.setFilter( QDir::Files | QDir::NoSymLinks );

   const QFileInfoList *list = d.entryInfoList();

   QFileInfoListIterator it( *list );

   QFileInfo *fi;

   while ( (fi=it.current()) ) {

+#ifdef QWS 

+    if(fi->fileName().contains(".so")){

+#else

     if(fi->fileName().contains(".so") && fi->fileName().contains("networksettings_")){

+#endif

       loadPlugin(path + "/" + fi->fileName());

     }

     ++it;

   }

 }

 

@@ -240,20 +257,20 @@ void MainWindowImp::loadModules(const QString &path){
  * @param pluginFileName - the name of the file in which to attempt to load

  * @param resolveString - function pointer to resolve 

  * @return pointer to the function with name resolveString or NULL

  */ 

 Module* MainWindowImp::loadPlugin(const QString &pluginFileName, const QString &resolveString){

 #ifdef DEBUG

-  qDebug("MainWindowImp::loadPlugin: %s", pluginFileName.latin1());

+  qDebug("MainWindowImp::loadPlugin: %s: resolving %s", pluginFileName.latin1(), resolveString.latin1());

 #endif

 #ifdef QWS 

   QLibrary *lib = new QLibrary(pluginFileName);

   void *functionPointer = lib->resolve(resolveString);

   if( !functionPointer ){

 #ifdef DEBUG

-  qDebug("MainWindowImp::loadPlugin: File: %s is not a plugin, but though was.", pluginFileName.latin1());

+  qDebug("MainWindowImp::loadPlugin: Warning: %s is not a plugin", pluginFileName.latin1());

 #endif

     delete lib;

     return NULL;

   }

   // Try to get an object.

   Module *object = ((Module* (*)()) functionPointer)();