XdefaultInterface.c File Reference

#include <errno.h>
#include "Xsocket.h"
#include "Xinit.h"
#include "Xutil.h"
#include "dagaddr.hpp"

Functions
int	XupdateDefaultInterface (int sockfd, int interface)
	Change the default interface for this host. More...
int	XdefaultInterface (int sockfd)
	Identify the default interface for this system. More...

Function Documentation

int XdefaultInterface

(

int

sockfd

)

An application can call XdefaultInterface() to identify the network interface that is the default interface for this system.

Parameters

sockfd

an Xsocket previously created.

Returns

the current default interface or -1 on error.

int XupdateDefaultInterface	(	int	sockfd,
		int	interface
	)

The XupdateDefaultInterface allows an application to change the default interface used by the system. The address accociated with the default interface is used as source address in outgoing packets. The response packets from a peer would then arrive on the default interface for all applications unless they choose to bind to another interface.

Note that this API changes the default interface for the system and will be a protected API in the future.

If an application needs to just change the source address for itself and not the entire system, it should bind() to an address associated with the intented interface and not use this API.

Parameters

sockfd	an Xsocket previously created.
interface	the new default interface.

Returns

0 on success or -1 on failure.