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.TH IF.H 3HEAD "Sep 10, 2004"
.SH NAME
if.h, if \- sockets local interfaces
.SH SYNOPSIS
.LP
.nf
#include <\fBnet/if.h\fR>
.fi

.SH DESCRIPTION
.sp
.LP
The <\fBnet/if.h\fR> header defines the \fBif_nameindex\fR structure, which
includes the following members:
.sp
.in +2
.nf
unsigned if_index     /* numeric index of the interface */
char     *if_name     /* null-terminated name of the interface */
.fi
.in -2

.sp
.LP
The <\fBnet/if.h\fR> header defines the following macro for the length of a
buffer containing an interface name (including the terminating null character):
.sp
.ne 2
.na
\fB\fBIF_NAMESIZE\fR\fR
.ad
.RS 15n
interface name length
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
.TE

.SH SEE ALSO
.sp
.LP
.BR if_nametoindex (3XNET),
.BR attributes (7),
.BR standards (7)