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/*++
/* NAME
/* midna_adomain 3
/* SUMMARY
/* address domain part conversion
/* SYNOPSIS
/* #include <midna_adomain.h>
/*
/* char *midna_adomain_to_ascii(
/* VSTRING *dest,
/* const char *name)
/*
/* char *midna_adomain_to_utf8(
/* VSTRING *dest,
/* const char *name)
/* DESCRIPTION
/* The functions in this module transform the domain portion
/* of an email address between ASCII and UTF-8 form. Both
/* functions tolerate a missing domain, and both functions
/* return a copy of the input when the domain portion requires
/* no conversion.
/*
/* midna_adomain_to_ascii() converts an UTF-8 or ASCII domain
/* portion to ASCII. The result is a null pointer when
/* conversion fails. This function verifies that the resulting
/* domain passes valid_hostname().
/*
/* midna_adomain_to_utf8() converts an UTF-8 or ASCII domain
/* name to UTF-8. The result is a null pointer when conversion
/* fails. This function verifies that the resulting domain,
/* after conversion to ASCII, passes valid_hostname().
/* SEE ALSO
/* midna_domain(3), Postfix ASCII/UTF-8 domain name conversion
/* DIAGNOSTICS
/* Fatal errors: memory allocation problem.
/* Warnings: conversion error or result validation error.
/* 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>
#include <string.h>
#ifndef NO_EAI
#include <unicode/uidna.h>
/*
* Utility library.
*/
#include <vstring.h>
#include <stringops.h>
#include <midna_domain.h>
/*
* Global library.
*/
#include <midna_adomain.h>
#define STR(x) vstring_str(x)
/* midna_adomain_to_utf8 - convert address domain portion to UTF8 */
char *midna_adomain_to_utf8(VSTRING *dest, const char *src)
{
const char *cp;
const char *domain_utf8;
if ((cp = strrchr(src, '@')) == 0) {
vstring_strcpy(dest, src);
} else {
vstring_sprintf(dest, "%*s@", (int) (cp - src), src);
if (*(cp += 1)) {
if (allascii(cp) && strstr(cp, "--") == 0) {
vstring_strcat(dest, cp);
} else if ((domain_utf8 = midna_domain_to_utf8(cp)) == 0) {
return (0);
} else {
vstring_strcat(dest, domain_utf8);
}
}
}
return (STR(dest));
}
/* midna_adomain_to_ascii - convert address domain portion to ASCII */
char *midna_adomain_to_ascii(VSTRING *dest, const char *src)
{
const char *cp;
const char *domain_ascii;
if ((cp = strrchr(src, '@')) == 0) {
vstring_strcpy(dest, src);
} else {
vstring_sprintf(dest, "%*s@", (int) (cp - src), src);
if (*(cp += 1)) {
if (allascii(cp)) {
vstring_strcat(dest, cp);
} else if ((domain_ascii = midna_domain_to_ascii(cp + 1)) == 0) {
return (0);
} else {
vstring_strcat(dest, domain_ascii);
}
}
}
return (STR(dest));
}
#endif /* NO_IDNA */
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