diff options
Diffstat (limited to '')
-rw-r--r-- | src/shared/idn-util.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/shared/idn-util.c b/src/shared/idn-util.c new file mode 100644 index 0000000..d4108d0 --- /dev/null +++ b/src/shared/idn-util.c @@ -0,0 +1,69 @@ +/* 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) { + 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 +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_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 |