if_nameindex - return all interface names and indexes
#include <net/if.h> struct if_nameindex *if_nameindex(void);
This function returns an array of if_nameindex structures, one structure per interface. The end of the array is indicated by a structure with an if_index field of zero and an if_name field of NULL.
Applications should call
if_freenameindex()to release the memory that may be dynamically allocated by this function, after they have finished using it.
Array of structures identifying local interfaces. A NULL pointer is returned upon an error, with errno set to indicate the nature of the error.
- Insufficient resources are available in the system to complete the call.
getsockopt(), if_freenameindex(), if_indextoname(), if_nametoindex(), setsockopt(), <net/if.h>
First released in Issue 5.2.