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Man Pages


Manual Reference Pages  -  LIBOWFAT_FMT_IP6IF (3)

NAME

fmt_ip6if - write a formatted ASCII representation of an IPv6 number

CONTENTS

Syntax
Description
Example

SYNTAX

#include <ip6.h>

unsigned int fmt_ip6if(char *dest,const char ip[16],uint32 scope_id);

DESCRIPTION

fmt_ip6if formats an IPv6 number in ASCII representation from ip and writes the result into dest. It returns the number of bytes written.

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

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

If dest 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.

EXAMPLE

#include <ip6.h>

char buf[IP6_FMT];
char ip[16];
scope_id sid;
buf[fmt_ip6if(buf,ip,sid)]=0;

SEE ALSO

scan_ip6(3), fmt_ip4(3)
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