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         if (freq_val >= 5900)
 123                 center_ofs = 0;
 124         else if (freq_val >= 5745)
 125                 center_ofs = 20;
 126         else
 127                 center_ofs = 35;
 128         tmp_channel = channel - center_ofs;
 129         tmp_channel &= ~((8 << width) - 1);
 130         center_idx = tmp_channel + center_ofs + (4 << width) - 1;
 131
 132         if (freq_val < 3000)
 133                 ucv_object_add(ret, "center_seg0_idx", ucv_int64_new(0));
 134         else
 135                 ucv_object_add(ret, "center_seg0_idx", ucv_int64_new(center_idx));
 136         center_idx = (center_idx - channel) * 5 + freq_val;
 137         ucv_object_add(ret, "center_freq1", ucv_int64_new(center_idx));
 138
 139 out:
 140         return ret;
 141 }
 142
 143 uc_value_t *uc_wpa_getpid(uc_vm_t *vm, size_t nargs)
 144 {
 145         return ucv_int64_new(getpid());
 146 }
 147
 148 uc_value_t *uc_wpa_sha1(uc_vm_t *vm, size_t nargs)
 149 {
 150         u8 hash[SHA1_MAC_LEN];
 151         char hash_hex[2 * ARRAY_SIZE(hash) + 1];
 152         uc_value_t *val;
 153         size_t *lens;
 154         const u8 **args;
 155         int i;
 156
 157         if (!nargs)
 158                 return NULL;
 159
 160         args = alloca(nargs * sizeof(*args));
 161         lens = alloca(nargs * sizeof(*lens));
 162         for (i = 0; i < nargs; i++) {
 163                 val = uc_fn_arg(i);
 164                 if (ucv_type(val) != UC_STRING)
 165                         return NULL;
 166
 167                 args[i] = ucv_string_get(val);
 168                 lens[i] = ucv_string_length(val);
 169         }
 170
 171         if (sha1_vector(nargs, args, lens, hash))
 172                 return NULL;
 173
 174         for (i = 0; i < ARRAY_SIZE(hash); i++)
 175                 sprintf(hash_hex + 2 * i, "%02x", hash[i]);
 176
 177         return ucv_string_new_length(hash_hex, 2 * ARRAY_SIZE(hash));
 178 }
 179
 180 uc_vm_t *wpa_ucode_create_vm(void)
 181 {
 182         static uc_parse_config_t config = {
 183                 .strict_declarations = true,
 184                 .lstrip_blocks = true,
 185                 .trim_blocks = true,
 186                 .raw_mode = true
 187         };
 188
 189         uc_search_path_init(&config.module_search_path);
 190         uc_search_path_add(&config.module_search_path, HOSTAPD_UC_PATH "*.so");
 191         uc_search_path_add(&config.module_search_path, HOSTAPD_UC_PATH "*.uc");
 192
 193         uc_vm_init(&vm, &config);
 194
 195         uc_stdlib_load(uc_vm_scope_get(&vm));
 196         eloop_add_uloop();
 197         gc_timer.cb = uc_gc_timer;
 198
 199         return &vm;
 200 }
 201
 202 int wpa_ucode_run(const char *script)
 203 {
 204         uc_source_t *source;
 205         uc_program_t *prog;
 206         uc_value_t *ops;
 207         char *err;
 208         int ret;
 209
 210         source = uc_source_new_file(script);
 211         if (!source)
 212                 return -1;
 213
 214         prog = uc_compile(vm.config, source, &err);
 215         uc_source_put(source);
 216         if (!prog) {
 217                 wpa_printf(MSG_ERROR, "Error loading ucode: %s\n", err);
 218                 return -1;
 219         }
 220
 221         ret = uc_vm_execute(&vm, prog, &ops);
 222         uc_program_put(prog);
 223         if (ret || !ops)
 224                 return -1;
 225
 226         registry = ucv_array_new(&vm);
 227         uc_vm_registry_set(&vm, "hostap.registry", registry);
 228         ucv_array_set(registry, 0, ucv_get(ops));
 229
 230         return 0;
 231 }
 232
 233 int wpa_ucode_call_prepare(const char *fname)
 234 {
 235         uc_value_t *obj, *func;
 236
 237         if (!registry)
 238                 return -1;
 239
 240         obj = ucv_array_get(registry, 0);
 241         if (!obj)
 242                 return -1;
 243
 244         func = ucv_object_get(obj, fname, NULL);
 245         if (!ucv_is_callable(func))
 246                 return -1;
 247
 248         uc_vm_stack_push(&vm, ucv_get(obj));
 249         uc_vm_stack_push(&vm, ucv_get(func));
 250
 251         return 0;
 252 }
 253
 254 uc_value_t *wpa_ucode_global_init(const char *name, uc_resource_type_t *global_type)
 255 {
 256         uc_value_t *global = uc_resource_new(global_type, NULL);
 257         uc_value_t *proto;
 258
 259         uc_vm_registry_set(&vm, "hostap.global", global);
 260         proto = ucv_prototype_get(global);
 261         ucv_object_add(proto, "data", ucv_get(ucv_object_new(&vm)));
 262
 263 #define ADD_CONST(x) ucv_object_add(proto, #x, ucv_int64_new(x))
 264         ADD_CONST(MSG_EXCESSIVE);
 265         ADD_CONST(MSG_MSGDUMP);
 266         ADD_CONST(MSG_DEBUG);
 267         ADD_CONST(MSG_INFO);
 268         ADD_CONST(MSG_WARNING);
 269         ADD_CONST(MSG_ERROR);
 270 #undef ADD_CONST
 271
 272         ucv_object_add(uc_vm_scope_get(&vm), name, ucv_get(global));
 273
 274         return global;
 275 }
 276
 277 int wpa_ucode_registry_add(uc_value_t *reg, uc_value_t *val)
 278 {
 279         uc_value_t *data;
 280         int i = 0;
 281
 282         while (ucv_array_get(reg, i))
 283                 i++;
 284
 285         ucv_array_set(reg, i, ucv_get(val));
 286
 287         return i + 1;
 288 }
 289
 290 uc_value_t *wpa_ucode_registry_get(uc_value_t *reg, int idx)
 291 {
 292         if (!idx)
 293                 return NULL;
 294
 295         return ucv_array_get(reg, idx - 1);
 296 }
 297
 298 uc_value_t *wpa_ucode_registry_remove(uc_value_t *reg, int idx)
 299 {
 300         uc_value_t *val = wpa_ucode_registry_get(reg, idx);
 301
 302         if (val)
 303                 ucv_array_set(reg, idx - 1, NULL);
 304
 305         return val;
 306 }
 307
 308
 309 uc_value_t *wpa_ucode_call(size_t nargs)
 310 {
 311         if (uc_vm_call(&vm, true, nargs) != EXCEPTION_NONE)
 312                 return NULL;
 313
 314         if (!gc_timer.pending)
 315                 uloop_timeout_set(&gc_timer, 10);
 316
 317         return uc_vm_stack_pop(&vm);
 318 }
 319
 320 void wpa_ucode_free_vm(void)
 321 {
 322         if (!vm.config)
 323                 return;
 324
 325         uc_search_path_free(&vm.config->module_search_path);
 326         uc_vm_free(&vm);
 327         registry = NULL;
 328         vm = (uc_vm_t){};
 329 }