package/network/services/hostapd/src/src/utils/ucode.c

   1 #include <unistd.h>
   2 #include "ucode.h"
   3 #include "utils/eloop.h"
   4 #include "crypto/crypto.h"
   5 #include "crypto/sha1.h"
   6 #include "common/ieee802_11_common.h"
   7 #include <libubox/uloop.h>
   8 #include <ucode/compiler.h>
   9
  10 static uc_value_t *registry;
  11 static uc_vm_t vm;
  12 static struct uloop_timeout gc_timer;
  13
  14 static void uc_gc_timer(struct uloop_timeout *timeout)
  15 {
  16         ucv_gc(&vm);
  17 }
  18
  19 uc_value_t *uc_wpa_printf(uc_vm_t *vm, size_t nargs)
  20 {
  21         uc_value_t *level = uc_fn_arg(0);
  22         uc_value_t *ret, **args;
  23         uc_cfn_ptr_t _sprintf;
  24         int l = MSG_INFO;
  25         int i, start = 0;
  26
  27         _sprintf = uc_stdlib_function("sprintf");
  28         if (!sprintf)
  29                 return NULL;
  30
  31         if (ucv_type(level) == UC_INTEGER) {
  32                 l = ucv_int64_get(level);
  33                 start++;
  34         }
  35
  36         if (nargs <= start)
  37                 return NULL;
  38
  39         ret = _sprintf(vm, nargs - start);
  40         if (ucv_type(ret) != UC_STRING)
  41                 return NULL;
  42
  43         wpa_printf(l, "%s", ucv_string_get(ret));
  44         ucv_put(ret);
  45
  46         return NULL;
  47 }
  48
  49 uc_value_t *uc_wpa_freq_info(uc_vm_t *vm, size_t nargs)
  50 {
  51         uc_value_t *freq = uc_fn_arg(0);
  52         uc_value_t *sec = uc_fn_arg(1);
  53         int width = ucv_uint64_get(uc_fn_arg(2));
  54         int freq_val, center_idx, center_ofs;
  55         enum oper_chan_width chanwidth;
  56         enum hostapd_hw_mode hw_mode;
  57         u8 op_class, channel, tmp_channel;
  58         const char *modestr;
  59         int sec_channel = 0;
  60         uc_value_t *ret;
  61
  62         if (ucv_type(freq) != UC_INTEGER)
  63                 return NULL;
  64
  65         freq_val = ucv_int64_get(freq);
  66         if (ucv_type(sec) == UC_INTEGER)
  67                 sec_channel = ucv_int64_get(sec);
  68         else if (sec)
  69                 return NULL;
  70         else if (freq_val > 4000)
  71                 sec_channel = (freq_val / 20) & 1 ? 1 : -1;
  72         else
  73                 sec_channel = freq_val < 2442 ? 1 : -1;
  74
  75         if (sec_channel != -1 && sec_channel != 1 && sec_channel != 0)
  76                 return NULL;
  77
  78         switch (width) {
  79         case 0:
  80                 chanwidth = CONF_OPER_CHWIDTH_USE_HT;
  81                 break;
  82         case 1:
  83                 chanwidth = CONF_OPER_CHWIDTH_80MHZ;
  84                 break;
  85         case 2:
  86                 chanwidth = CONF_OPER_CHWIDTH_160MHZ;
  87                 break;
  88         default:
  89                 return NULL;
  90         }
  91
  92         hw_mode = ieee80211_freq_to_channel_ext(freq_val, sec_channel,
  93                                                 chanwidth, &op_class, &channel);
  94         switch (hw_mode) {
  95         case HOSTAPD_MODE_IEEE80211B:
  96                 modestr = "b";
  97                 break;
  98         case HOSTAPD_MODE_IEEE80211G:
  99                 modestr = "g";
 100                 break;
 101         case HOSTAPD_MODE_IEEE80211A:
 102                 modestr = "a";
 103                 break;
 104         case HOSTAPD_MODE_IEEE80211AD:
 105                 modestr = "ad";
 106                 break;
 107         default:
 108                 return NULL;
 109         }
 110
 111         ret = ucv_object_new(vm);
 112         ucv_object_add(ret, "op_class", ucv_int64_new(op_class));
 113         ucv_object_add(ret, "channel", ucv_int64_new(channel));
 114         ucv_object_add(ret, "hw_mode", ucv_int64_new(hw_mode));
 115         ucv_object_add(ret, "hw_mode_str", ucv_get(ucv_string_new(modestr)));
 116         ucv_object_add(ret, "sec_channel", ucv_int64_new(sec_channel));
 117         ucv_object_add(ret, "frequency", ucv_int64_new(freq_val));
 118
 119         if (!sec_channel)
 120                 return ret;
 121
 122         center_ofs = freq_val >= 5900 ? 0 : 3;
 123         tmp_channel = channel - center_ofs;
 124         tmp_channel &= ~((8 << width) - 1);
 125         center_idx = tmp_channel + center_ofs + (4 << width) - 1;
 126
 127         ucv_object_add(ret, "center_seg0_idx", ucv_int64_new(center_idx));
 128         center_idx = (center_idx - channel) * 5 + freq_val;
 129         ucv_object_add(ret, "center_freq1", ucv_int64_new(center_idx));
 130
 131 out:
 132         return ret;
 133 }
 134
 135 uc_value_t *uc_wpa_getpid(uc_vm_t *vm, size_t nargs)
 136 {
 137         return ucv_int64_new(getpid());
 138 }
 139
 140 uc_value_t *uc_wpa_sha1(uc_vm_t *vm, size_t nargs)
 141 {
 142         u8 hash[SHA1_MAC_LEN];
 143         char hash_hex[2 * ARRAY_SIZE(hash) + 1];
 144         uc_value_t *val;
 145         size_t *lens;
 146         const u8 **args;
 147         int i;
 148
 149         if (!nargs)
 150                 return NULL;
 151
 152         args = alloca(nargs * sizeof(*args));
 153         lens = alloca(nargs * sizeof(*lens));
 154         for (i = 0; i < nargs; i++) {
 155                 val = uc_fn_arg(i);
 156                 if (ucv_type(val) != UC_STRING)
 157                         return NULL;
 158
 159                 args[i] = ucv_string_get(val);
 160                 lens[i] = ucv_string_length(val);
 161         }
 162
 163         if (sha1_vector(nargs, args, lens, hash))
 164                 return NULL;
 165
 166         for (i = 0; i < ARRAY_SIZE(hash); i++)
 167                 sprintf(hash_hex + 2 * i, "%02x", hash[i]);
 168
 169         return ucv_string_new_length(hash_hex, 2 * ARRAY_SIZE(hash));
 170 }
 171
 172 uc_vm_t *wpa_ucode_create_vm(void)
 173 {
 174         static uc_parse_config_t config = {
 175                 .strict_declarations = true,
 176                 .lstrip_blocks = true,
 177                 .trim_blocks = true,
 178                 .raw_mode = true
 179         };
 180
 181         uc_search_path_init(&config.module_search_path);
 182         uc_search_path_add(&config.module_search_path, HOSTAPD_UC_PATH "*.so");
 183         uc_search_path_add(&config.module_search_path, HOSTAPD_UC_PATH "*.uc");
 184
 185         uc_vm_init(&vm, &config);
 186
 187         uc_stdlib_load(uc_vm_scope_get(&vm));
 188         eloop_add_uloop();
 189         gc_timer.cb = uc_gc_timer;
 190
 191         return &vm;
 192 }
 193
 194 int wpa_ucode_run(const char *script)
 195 {
 196         uc_source_t *source;
 197         uc_program_t *prog;
 198         uc_value_t *ops;
 199         char *err;
 200         int ret;
 201
 202         source = uc_source_new_file(script);
 203         if (!source)
 204                 return -1;
 205
 206         prog = uc_compile(vm.config, source, &err);
 207         uc_source_put(source);
 208         if (!prog) {
 209                 wpa_printf(MSG_ERROR, "Error loading ucode: %s\n", err);
 210                 return -1;
 211         }
 212
 213         ret = uc_vm_execute(&vm, prog, &ops);
 214         uc_program_put(prog);
 215         if (ret || !ops)
 216                 return -1;
 217
 218         registry = ucv_array_new(&vm);
 219         uc_vm_registry_set(&vm, "hostap.registry", registry);
 220         ucv_array_set(registry, 0, ucv_get(ops));
 221
 222         return 0;
 223 }
 224
 225 int wpa_ucode_call_prepare(const char *fname)
 226 {
 227         uc_value_t *obj, *func;
 228
 229         if (!registry)
 230                 return -1;
 231
 232         obj = ucv_array_get(registry, 0);
 233         if (!obj)
 234                 return -1;
 235
 236         func = ucv_object_get(obj, fname, NULL);
 237         if (!ucv_is_callable(func))
 238                 return -1;
 239
 240         uc_vm_stack_push(&vm, ucv_get(obj));
 241         uc_vm_stack_push(&vm, ucv_get(func));
 242
 243         return 0;
 244 }
 245
 246 uc_value_t *wpa_ucode_global_init(const char *name, uc_resource_type_t *global_type)
 247 {
 248         uc_value_t *global = uc_resource_new(global_type, NULL);
 249         uc_value_t *proto;
 250
 251         uc_vm_registry_set(&vm, "hostap.global", global);
 252         proto = ucv_prototype_get(global);
 253         ucv_object_add(proto, "data", ucv_get(ucv_object_new(&vm)));
 254
 255 #define ADD_CONST(x) ucv_object_add(proto, #x, ucv_int64_new(x))
 256         ADD_CONST(MSG_EXCESSIVE);
 257         ADD_CONST(MSG_MSGDUMP);
 258         ADD_CONST(MSG_DEBUG);
 259         ADD_CONST(MSG_INFO);
 260         ADD_CONST(MSG_WARNING);
 261         ADD_CONST(MSG_ERROR);
 262 #undef ADD_CONST
 263
 264         ucv_object_add(uc_vm_scope_get(&vm), name, ucv_get(global));
 265
 266         return global;
 267 }
 268
 269 static uc_value_t *wpa_ucode_prototype_clone(uc_value_t *uval)
 270 {
 271         uc_value_t *proto, *proto_new;
 272
 273         proto = ucv_prototype_get(uval);
 274         proto_new = ucv_object_new(&vm);
 275
 276         ucv_object_foreach(proto, key, val)
 277                 ucv_object_add(proto_new, key, ucv_get(val));
 278         ucv_prototype_set(uval, ucv_get(proto));
 279
 280         return proto;
 281 }
 282
 283 void wpa_ucode_registry_add(uc_value_t *reg, uc_value_t *val, int *idx)
 284 {
 285         uc_value_t *data;
 286         int i = 0;
 287
 288         while (ucv_array_get(reg, i))
 289                 i++;
 290
 291         ucv_array_set(reg, i, ucv_get(val));
 292
 293         data = ucv_object_new(&vm);
 294         ucv_object_add(wpa_ucode_prototype_clone(val), "data", ucv_get(data));
 295
 296         *idx = i + 1;
 297 }
 298
 299 uc_value_t *wpa_ucode_registry_get(uc_value_t *reg, int idx)
 300 {
 301         if (!idx)
 302                 return NULL;
 303
 304         return ucv_array_get(reg, idx - 1);
 305 }
 306
 307 uc_value_t *wpa_ucode_registry_remove(uc_value_t *reg, int idx)
 308 {
 309         uc_value_t *val = wpa_ucode_registry_get(reg, idx);
 310
 311         if (val)
 312                 ucv_array_set(reg, idx - 1, NULL);
 313
 314         return val;
 315 }
 316
 317
 318 uc_value_t *wpa_ucode_call(size_t nargs)
 319 {
 320         if (uc_vm_call(&vm, true, nargs) != EXCEPTION_NONE)
 321                 return NULL;
 322
 323         if (!gc_timer.pending)
 324                 uloop_timeout_set(&gc_timer, 10);
 325
 326         return uc_vm_stack_pop(&vm);
 327 }
 328
 329 void wpa_ucode_free_vm(void)
 330 {
 331         if (!vm.config)
 332                 return;
 333
 334         uc_search_path_free(&vm.config->module_search_path);
 335         uc_vm_free(&vm);
 336         registry = NULL;
 337         vm = (uc_vm_t){};
 338 }