#include <NetworkNamespaceContext.h>

Public Member Functions
	NetworkNamespaceContext (const char *networkNamespace)

	~NetworkNamespaceContext ()

Protected Attributes
int	oldNs = -1

int	newNs = -1

Constructor & Destructor Documentation

◆ NetworkNamespaceContext()

inet::NetworkNamespaceContext::NetworkNamespaceContext ( const char * networkNamespace )

 {
     if (networkNamespace != nullptr && *networkNamespace != '\0') {
 #ifdef __linux__
         oldNs = open("/proc/self/ns/net", O_RDONLY);
         std::string namespaceAsString = "/var/run/netns/";
         namespaceAsString += networkNamespace;
         newNs = open(namespaceAsString.c_str(), O_RDONLY);
         if (newNs == -1)
             throw cRuntimeError("Cannot open network namespace");
         if (setns(newNs, 0) == -1)
             throw cRuntimeError("Cannot change network namespace");
 #else
         throw cRuntimeError("Network namespaces are only supported on Linux");
 #endif
     }
 }

◆ ~NetworkNamespaceContext()

inet::NetworkNamespaceContext::~NetworkNamespaceContext ( )

 {
     if (newNs != -1) {
 #ifdef __linux__
         setns(oldNs, 0);
         close(oldNs);
         close(newNs);
         oldNs = -1;
         newNs = -1;
 #endif
     }
 }

Member Data Documentation

◆ newNs

int inet::NetworkNamespaceContext::newNs = -1

protected

Referenced by NetworkNamespaceContext(), and ~NetworkNamespaceContext().

◆ oldNs

int inet::NetworkNamespaceContext::oldNs = -1