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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#if HAVE_LIBIDN2
# include <idn2.h>
#elif HAVE_LIBIDN
# include <idna.h>
# include <stringprep.h>
#endif
#include "alloc-util.h"
#include "dlfcn-util.h"
#include "idn-util.h"
#if HAVE_LIBIDN || HAVE_LIBIDN2
static void* idn_dl = NULL;
#endif
#if HAVE_LIBIDN2
DLSYM_FUNCTION(idn2_lookup_u8);
const char *(*sym_idn2_strerror)(int rc) _const_ = NULL;
DLSYM_FUNCTION(idn2_to_unicode_8z8z);
int dlopen_idn(void) {
ELF_NOTE_DLOPEN("idn",
"Support for internationalized domain names",
ELF_NOTE_DLOPEN_PRIORITY_SUGGESTED,
"libidn2.so.0");
return dlopen_many_sym_or_warn(
&idn_dl, "libidn2.so.0", LOG_DEBUG,
DLSYM_ARG(idn2_lookup_u8),
DLSYM_ARG(idn2_strerror),
DLSYM_ARG(idn2_to_unicode_8z8z));
}
#endif
#if HAVE_LIBIDN
DLSYM_FUNCTION(idna_to_ascii_4i);
DLSYM_FUNCTION(idna_to_unicode_44i);
DLSYM_FUNCTION(stringprep_ucs4_to_utf8);
DLSYM_FUNCTION(stringprep_utf8_to_ucs4);
int dlopen_idn(void) {
_cleanup_(dlclosep) void *dl = NULL;
int r;
ELF_NOTE_DLOPEN("idn",
"Support for internationalized domain names",
ELF_NOTE_DLOPEN_PRIORITY_SUGGESTED,
"libidn.so.12", "libidn.so.11");
if (idn_dl)
return 0; /* Already loaded */
dl = dlopen("libidn.so.12", RTLD_LAZY);
if (!dl) {
/* libidn broke ABI in 1.34, but not in a way we care about (a new field got added to an
* open-coded struct we do not use), hence support both versions. */
dl = dlopen("libidn.so.11", RTLD_LAZY);
if (!dl)
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"libidn support is not installed: %s", dlerror());
log_debug("Loaded 'libidn.so.11' via dlopen()");
} else
log_debug("Loaded 'libidn.so.12' via dlopen()");
r = dlsym_many_or_warn(
dl,
LOG_DEBUG,
DLSYM_ARG(idna_to_ascii_4i),
DLSYM_ARG(idna_to_unicode_44i),
DLSYM_ARG(stringprep_ucs4_to_utf8),
DLSYM_ARG(stringprep_utf8_to_ucs4));
if (r < 0)
return r;
idn_dl = TAKE_PTR(dl);
return 1;
}
#endif
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