IDN(2)IDN(2)

NAME

utf2idn, idn2utf – convert internationalized domain names to and from unicode

SYNOPSIS

#include <u.h>
#include <libc.h>

int utf2idn(char *name, char *buf, int nbuf);

int idn2utf(char *name, char *buf, int nbuf);

DESCRIPTION

These routines handle encoding and decoding of domain names as specified by RFC5890.

Utf2idn encodes the UTF string name to ASCII internatlionalized domain name in buf. Idn2utf does the reverse, decoding the ASCII string name back to UTF in buf. The maximum size of buf is gived by nbuf.

DIAGNOSTICS

The return value is the number of bytes (excluding the terminating NULL) in buf or -1 on failure.

SOURCE

/sys/src/libc/9sys/idn.c

SEE ALSO

/lib/rfc/rfc5890
utf(6)