net_if.h(0P) POSIX Programmer's Manual net_if.h(0P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
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 ter‐
minating NULL character):
IF_NAMESIZE 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 *);
The following sections are informative.
The System Interfaces volume of POSIX.1‐2008, if_freenameindex(),
if_indextoname(), if_nameindex(), if_nametoindex()COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.unix.org/online.html .
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IEEE/The Open Group 2013 net_if.h(0P)