.TH fmt_ip6if 3
.SH NAME
fmt_ip6if \- write a formatted ASCII representation of an IPv6 number
.SH SYNTAX
.B #include <libowfat/ip6.h>

unsigned int \fBfmt_ip6if\fP(char *\fIdest\fR,const char \fIip\fR[16],uint32 \fIscope_id\fR);
.SH DESCRIPTION
fmt_ip6if formats an IPv6 number in ASCII representation from \fIip\fR and
writes the result into \fIdest\fR. It returns the number of bytes
written.

fmt_ip6if will apply "::" compression to the output.

If \fIip\fR is an IPv4-mapped IPv6 address, fmt_ip6if will output the last
4 bytes as IPv4 number in dotted-decimal notation.

If \fIdest\fR equals FMT_LEN (i.e. is zero), fmt_ip6if returns the number
of bytes it would have written.

fmt_ip6 does not append \\0.

ip6.h defines the integer IP6_FMT to be big enough to contain every
possible fmt_ip6 output plus \\0.  However, for fmt_ip6if you need to
add 1 for the '%' and IF_NAMESIZE from <net/if.h> for the interface
name.
.SH EXAMPLE
#include <libowfat/ip6.h>

  char buf[IP6_FMT];
  char ip[16];
  scope_id sid;
  buf[fmt_ip6if(buf,ip,sid)]=0;
.SH "SEE ALSO"
scan_ip6(3), fmt_ip4(3)