ifa_ifwithdstaddr Kernel Service
Purpose
Locates the point-to-point interface with a given destination address.
Syntax
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <net/if.h>struct ifaddr * ifa_ifwithdstaddr ( addr)
struct sockaddr *addr;
struct sockaddr *addr;
Parameter
| Item | Description |
|---|---|
| addr | Specifies a destination address. |
Description
The ifa_ifwithdstaddr kernel service searches the list of point-to-point addresses per interface and locates the connection with the destination address specified by the addr parameter.
Execution Environment
The ifa_withdstaddr kernel service can be called from either the process or interrupt environment.
Return Values
If successful, the ifa_ifwithdstaddr service returns the corresponding ifaddr structure associated with the point-to-point interface. If no interface is found, the ifa_ifwithdstaddr service returns a null pointer.
Example
To locate the point-to-point interface with a given destination address, invoke the ifa_ifwithdstaddr kernel service as follows:
ifa_ifwithdstaddr((struct sockaddr *)&ipaddr);