92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#if HAVE_LIBIDN2
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# include <idn2.h>
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#elif HAVE_LIBIDN
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# include <idna.h>
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# include <stringprep.h>
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#endif
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#include "alloc-util.h"
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#include "dlfcn-util.h"
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#include "idn-util.h"
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#if HAVE_LIBIDN || HAVE_LIBIDN2
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static void* idn_dl = NULL;
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#endif
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#if HAVE_LIBIDN2
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int (*sym_idn2_lookup_u8)(const uint8_t* src, uint8_t** lookupname, int flags) = NULL;
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const char *(*sym_idn2_strerror)(int rc) = NULL;
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int (*sym_idn2_to_unicode_8z8z)(const char * input, char ** output, int flags) = NULL;
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int dlopen_idn(void) {
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_cleanup_(dlclosep) void *dl = NULL;
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int r;
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if (idn_dl)
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return 0; /* Already loaded */
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dl = dlopen("libidn2.so.0", RTLD_LAZY);
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if (!dl)
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return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
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"libidn2 support is not installed: %s", dlerror());
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r = dlsym_many_and_warn(
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dl,
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LOG_DEBUG,
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&sym_idn2_lookup_u8, "idn2_lookup_u8",
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&sym_idn2_strerror, "idn2_strerror",
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&sym_idn2_to_unicode_8z8z, "idn2_to_unicode_8z8z",
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NULL);
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if (r < 0)
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return r;
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/* Note that we never release the reference here, because there's no real reason to, after all this
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* was traditionally a regular shared library dependency which lives forever too. */
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idn_dl = TAKE_PTR(dl);
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return 1;
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}
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#endif
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#if HAVE_LIBIDN
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int (*sym_idna_to_ascii_4i)(const uint32_t * in, size_t inlen, char *out, int flags);
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int (*sym_idna_to_unicode_44i)(const uint32_t * in, size_t inlen,uint32_t * out, size_t * outlen, int flags);
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char* (*sym_stringprep_ucs4_to_utf8)(const uint32_t * str, ssize_t len, size_t * items_read, size_t * items_written);
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uint32_t* (*sym_stringprep_utf8_to_ucs4)(const char *str, ssize_t len, size_t *items_written);
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int dlopen_idn(void) {
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_cleanup_(dlclosep) void *dl = NULL;
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int r;
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if (idn_dl)
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return 0; /* Already loaded */
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dl = dlopen("libidn.so.12", RTLD_LAZY);
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if (!dl) {
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/* libidn broke ABI in 1.34, but not in a way we care about (a new field got added to an
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* open-coded struct we do not use), hence support both versions. */
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dl = dlopen("libidn.so.11", RTLD_LAZY);
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if (!dl)
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return log_debug_errno(SYNTHETIC_ERRNO(EOPNOTSUPP),
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"libidn support is not installed: %s", dlerror());
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}
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r = dlsym_many_and_warn(
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dl,
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LOG_DEBUG,
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&sym_idna_to_ascii_4i, "idna_to_ascii_4i",
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&sym_idna_to_unicode_44i, "idna_to_unicode_44i",
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&sym_stringprep_ucs4_to_utf8, "stringprep_ucs4_to_utf8",
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&sym_stringprep_utf8_to_ucs4, "stringprep_utf8_to_ucs4",
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NULL);
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if (r < 0)
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return r;
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idn_dl = TAKE_PTR(dl);
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return 1;
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}
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#endif
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