net/if.h - sockets local interfaces
The <net/if.h> header shall define the if_nameindex structure, which shall include 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 symbolic constant 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.void if_freenameindex(struct if_nameindex *); char *if_indextoname(unsigned, char *); struct if_nameindex *if_nameindex(void); unsigned if_nametoindex(const char *);
XSH if_freenameindex , if_indextoname , if_nameindex , if_nametoindex
First released in Issue 6. Derived from the XNS, Issue 5.2 specification.
This reference page is clarified with respect to macros and symbolic constants.
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