Use the NET_STACK_DRIVER_PATH environment variable if available.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5157 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/network/ppp/shared/libppp/Jamfile

@@ -11,6 +11,7 @@ UseHeaders [ FDirName $(OBOS_TOP) src add-ons kernel network ppp shared libkerne
 StaticLibrary ppp :
 	settings_tools.cpp
 	
+	_libppputils.cpp
 	PPPInterface.cpp
 	PPPManager.cpp
 ;

src/add-ons/kernel/network/ppp/shared/libppp/PPPInterface.cpp

@@ -8,12 +8,12 @@
 #include "PPPInterface.h"
 
 #include <unistd.h>
-#include <net_stack_driver.h>
+#include "_libppputils.h"
 
 
 PPPInterface::PPPInterface(interface_id ID = PPP_UNDEFINED_INTERFACE_ID)
 {
-	fFD = open("/dev/net/stack", O_RDWR);
+	fFD = open(get_stack_driver_path(), O_RDWR);
 	
 	SetTo(ID);
 }
@@ -21,7 +21,7 @@ PPPInterface::PPPInterface(interface_id ID = PPP_UNDEFINED_INTERFACE_ID)
 
 PPPInterface::PPPInterface(const PPPInterface& copy)
 {
-	fFD = open("/dev/net/stack", O_RDWR);
+	fFD = open(get_stack_driver_path(), O_RDWR);
 	
 	SetTo(copy.ID());
 }

src/add-ons/kernel/network/ppp/shared/libppp/PPPManager.cpp

@@ -8,14 +8,14 @@
 #include "PPPManager.h"
 #include "PPPInterface.h"
 
-#include <net_stack_driver.h>
 #include <settings_tools.h>
 #include <unistd.h>
+#include "_libppputils.h"
 
 
 PPPManager::PPPManager()
 {
-	fFD = open("/dev/net/stack", O_RDWR);
+	fFD = open(get_stack_driver_path(), O_RDWR);
 }
 
 

src/add-ons/kernel/network/ppp/shared/libppp/_libppputils.cpp

@@ -0,0 +1,23 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+
+#include <OS.h>
+#include "_libppputils.h"
+#include <cstdlib>
+
+
+char*
+get_stack_driver_path()
+{
+	char *path;
+	
+	// user-defined stack driver path?
+	path = getenv("NET_STACK_DRIVER_PATH");
+	if(path)
+		return path;
+	
+	// use the default stack driver path
+	return NET_STACK_DRIVER_PATH;
+}

src/add-ons/kernel/network/ppp/shared/libppp/_libppputils.h

@@ -0,0 +1,15 @@
+//----------------------------------------------------------------------
+//  This software is part of the OpenBeOS distribution and is covered 
+//  by the OpenBeOS license.
+//---------------------------------------------------------------------
+
+#ifndef __libppputils__h
+#define __libppputils__h
+
+#include <net_stack_driver.h>
+
+
+char *get_stack_driver_path();
+
+
+#endif