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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
int (*sym_idn2_lookup_u8)(const uint8_t* src, uint8_t** lookupname, int flags) = NULL;
const char *(*sym_idn2_strerror)(int rc) = NULL;
int (*sym_idn2_to_unicode_8z8z)(const char * input, char ** output, int flags) = NULL;
int dlopen_idn(void) {
_cleanup_(dlclosep) void *dl = NULL;
int r;
if (idn_dl)
return 0; /* Already loaded */
dl = dlopen("libidn2.so.0", RTLD_LAZY);
if (!dl)
return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
"libidn2 support is not installed: %s", dlerror());
r = dlsym_many_and_warn(
dl,
LOG_DEBUG,
DLSYM_ARG(idn2_lookup_u8),
DLSYM_ARG(idn2_strerror),
DLSYM_ARG(idn2_to_unicode_8z8z),
NULL);
if (r < 0)
return r;
/* Note that we never release the reference here, because there's no real reason to, after all this
* was traditionally a regular shared library dependency which lives forever too. */
idn_dl = TAKE_PTR(dl);
return 1;
}
#endif
#if HAVE_LIBIDN
int (*sym_idna_to_ascii_4i)(const uint32_t * in, size_t inlen, char *out, int flags);
int (*sym_idna_to_unicode_44i)(const uint32_t * in, size_t inlen,uint32_t * out, size_t * outlen, int flags);
char* (*sym_stringprep_ucs4_to_utf8)(const uint32_t * str, ssize_t len, size_t * items_read, size_t * items_written);
uint32_t* (*sym_stringprep_utf8_to_ucs4)(const char *str, ssize_t len, size_t *items_written);
int dlopen_idn(void) {
_cleanup_(dlclosep) void *dl = NULL;
int r;
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());
}
r = dlsym_many_and_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),
NULL);
if (r < 0)
return r;
idn_dl = TAKE_PTR(dl);
return 1;
}
#endif
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