net/if.h - sockets local interfaces
The <net/if.h> header shall define the if_nameindex structure that includes at least the following members:unsigned if_index Numeric index of the interface. char *if_name Null-terminated name of the interface.
The <net/if.h> header shall define the following macro for the length of a buffer containing an interface name (including the terminating NULL character):
- Interface name length.
The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.unsigned if_nametoindex(const char *); char *if_indextoname(unsigned, char *); struct if_nameindex *if_nameindex(void); void if_freenameindex(struct if_nameindex *);
The System Interfaces volume of IEEE Std 1003.1-2001, if_freenameindex(), if_indextoname(), if_nameindex(), if_nametoindex()
First released in Issue 6. Derived from the XNS, Issue 5.2 specification.