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/*++
/* NAME
/* valid_utf8_hostname 3
/* SUMMARY
/* validate (maybe UTF-8) domain name
/* SYNOPSIS
/* #include <valid_utf8_hostname.h>
/*
/* int valid_utf8_hostname(
/* int enable_utf8,
/* const char *domain,
/* int gripe)
/* DESCRIPTION
/* valid_utf8_hostname() is a wrapper around valid_hostname().
/* If EAI support is compiled in, and enable_utf8 is true, the
/* name is converted from UTF-8 to ASCII per IDNA rules, before
/* invoking valid_hostname().
/* SEE ALSO
/* valid_hostname(3) STD3 hostname validation.
/* DIAGNOSTICS
/* Fatal errors: memory allocation problem.
/* Warnings: malformed domain name.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/*
* System library.
*/
#include <sys_defs.h>
/*
* Utility library.
*/
#include <msg.h>
#include <mymalloc.h>
#include <stringops.h>
#include <valid_hostname.h>
#include <midna_domain.h>
#include <valid_utf8_hostname.h>
/* valid_utf8_hostname - validate internationalized domain name */
int valid_utf8_hostname(int enable_utf8, const char *name, int gripe)
{
static const char myname[] = "valid_utf8_hostname";
/*
* Trivial cases first.
*/
if (*name == 0) {
if (gripe)
msg_warn("%s: empty domain name", myname);
return (0);
}
/*
* Convert non-ASCII domain name to ASCII and validate the result per
* STD3. midna_domain_to_ascii() applies valid_hostname() to the result.
* Propagate the gripe parameter for better diagnostics (note that
* midna_domain_to_ascii() logs a problem only when the result is not
* cached).
*/
#ifndef NO_EAI
if (enable_utf8 && !allascii(name)) {
if (midna_domain_to_ascii(name) == 0) {
if (gripe)
msg_warn("%s: malformed UTF-8 domain name", myname);
return (0);
} else {
return (1);
}
}
#endif
/*
* Validate ASCII name per STD3.
*/
return (valid_hostname(name, gripe));
}
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