mesh.c

   1 #include <errno.h>
   2 #include <string.h>
   3
   4 #include <netlink/genl/genl.h>
   5 #include <netlink/genl/family.h>
   6 #include <netlink/genl/ctrl.h>
   7 #include <netlink/msg.h>
   8 #include <netlink/attr.h>
   9
  10 #include "nl80211.h"
  11 #include "iw.h"
  12
  13 SECTION(mesh);
  14
  15
  16 typedef struct _any_t {
  17         union {
  18                 uint32_t as_32;
  19                 int32_t as_s32;
  20                 uint16_t as_16;
  21                 uint8_t as_8;
  22         } u;
  23 } _any;
  24
  25 /* describes a mesh parameter */
  26 struct mesh_param_descr {
  27         const char *name;
  28         enum nl80211_meshconf_params mesh_param_num;
  29         int (*nla_put_fn)(struct nl_msg*, int, _any*);
  30         uint32_t (*parse_fn)(const char*, _any*);
  31         void (*nla_print_fn)(struct nlattr *);
  32 };
  33
  34 /* utility functions for manipulating and printing u8/u16/u32 values and
  35  * timesouts. */
  36 static int _my_nla_put_u8(struct nl_msg *n, int mesh_param_num, _any *value)
  37 {
  38         return nla_put(n, mesh_param_num, sizeof(uint8_t), &value->u.as_8);
  39 }
  40
  41 static int _my_nla_put_u16(struct nl_msg *n, int mesh_param_num, _any *value)
  42 {
  43         return nla_put(n, mesh_param_num, sizeof(uint16_t), &value->u.as_16);
  44 }
  45
  46 static int _my_nla_put_u32(struct nl_msg *n, int mesh_param_num, _any *value)
  47 {
  48         return nla_put(n, mesh_param_num, sizeof(uint32_t), &value->u.as_32);
  49 }
  50
  51 static uint32_t _parse_u8(const char *str, _any *ret)
  52 {
  53         char *endptr = NULL;
  54         unsigned long int v = strtoul(str, &endptr, 10);
  55         if (*endptr != '\0')
  56                 return 0xff;
  57         if (v > 0xff)
  58                 return 0xff;
  59         ret->u.as_8 = (uint8_t)v;
  60         return 0;
  61 }
  62
  63 static uint32_t _parse_u8_as_bool(const char *str, _any *ret)
  64 {
  65         char *endptr = NULL;
  66         unsigned long int v = strtoul(str, &endptr, 10);
  67         if (*endptr != '\0')
  68                 return 0x1;
  69         if (v > 0x1)
  70                 return 0x1;
  71         ret->u.as_8 = (uint8_t)v;
  72         return 0;
  73 }
  74
  75 static uint32_t _parse_u16(const char *str, _any *ret)
  76 {
  77         char *endptr = NULL;
  78         long int v = strtol(str, &endptr, 10);
  79         if (*endptr != '\0')
  80                 return 0xffff;
  81         if ((v < 0) || (v > 0xffff))
  82                 return 0xffff;
  83         ret->u.as_16 = (uint16_t)v;
  84         return 0;
  85 }
  86
  87 static uint32_t _parse_u32(const char *str, _any *ret)
  88 {
  89         char *endptr = NULL;
  90         long long int v = strtoll(str, &endptr, 10);
  91         if (*endptr != '\0')
  92                 return 0xffffffff;
  93         if ((v < 0) || (v > 0xffffffff))
  94                 return 0xffffffff;
  95         ret->u.as_32 = (uint32_t)v;
  96         return 0;
  97 }
  98
  99 static uint32_t _parse_s32(const char *str, _any *ret)
 100 {
 101         char *endptr = NULL;
 102         long int v = strtol(str, &endptr, 10);
 103         if (*endptr != '\0')
 104                 return 0xffffffff;
 105         if (v > 0xff)
 106                 return 0xffffffff;
 107         ret->u.as_s32 = (int32_t)v;
 108         return 0;
 109 }
 110
 111 static uint32_t _parse_u32_power_mode(const char *str, _any *ret)
 112 {
 113         unsigned long int v;
 114
 115         /* Parse attribute for the name of power mode */
 116         if (!strcmp(str, "active"))
 117                 v = NL80211_MESH_POWER_ACTIVE;
 118         else if (!strcmp(str, "light"))
 119                 v = NL80211_MESH_POWER_LIGHT_SLEEP;
 120         else if (!strcmp(str, "deep"))
 121                 v = NL80211_MESH_POWER_DEEP_SLEEP;
 122         else
 123                 return 0xff;
 124
 125         ret->u.as_32 = (uint32_t)v;
 126         return 0;
 127 }
 128
 129 static void _print_u8(struct nlattr *a)
 130 {
 131         printf("%d", nla_get_u8(a));
 132 }
 133
 134 static void _print_u16(struct nlattr *a)
 135 {
 136         printf("%d", nla_get_u16(a));
 137 }
 138
 139 static void _print_u16_timeout(struct nlattr *a)
 140 {
 141         printf("%d milliseconds", nla_get_u16(a));
 142 }
 143
 144 static void _print_u16_in_TUs(struct nlattr *a)
 145 {
 146         printf("%d TUs", nla_get_u16(a));
 147 }
 148
 149 static void _print_u32(struct nlattr *a)
 150 {
 151         printf("%d", nla_get_u32(a));
 152 }
 153
 154 static void _print_u32_timeout(struct nlattr *a)
 155 {
 156         printf("%u milliseconds", nla_get_u32(a));
 157 }
 158
 159 static void _print_u32_in_seconds(struct nlattr *a)
 160 {
 161         printf("%d seconds", nla_get_u32(a));
 162 }
 163
 164 static void _print_u32_in_TUs(struct nlattr *a)
 165 {
 166         printf("%d TUs", nla_get_u32(a));
 167 }
 168
 169 static void _print_u32_power_mode(struct nlattr *a)
 170 {
 171         unsigned long v = nla_get_u32(a);
 172
 173         switch (v) {
 174         case NL80211_MESH_POWER_ACTIVE:
 175                 printf("active");
 176                 break;
 177         case NL80211_MESH_POWER_LIGHT_SLEEP:
 178                 printf("light");
 179                 break;
 180         case NL80211_MESH_POWER_DEEP_SLEEP:
 181                 printf("deep");
 182                 break;
 183         default:
 184                 printf("undefined");
 185                 break;
 186         }
 187 }
 188
 189 static void _print_s32_in_dBm(struct nlattr *a)
 190 {
 191         printf("%d dBm", (int32_t) nla_get_u32(a));
 192 }
 193
 194
 195 /* The current mesh parameters */
 196 static const struct mesh_param_descr _mesh_param_descrs[] =
 197 {
 198         {"mesh_retry_timeout",
 199         NL80211_MESHCONF_RETRY_TIMEOUT,
 200         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 201         {"mesh_confirm_timeout",
 202         NL80211_MESHCONF_CONFIRM_TIMEOUT,
 203         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 204         {"mesh_holding_timeout",
 205         NL80211_MESHCONF_HOLDING_TIMEOUT,
 206         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 207         {"mesh_max_peer_links",
 208         NL80211_MESHCONF_MAX_PEER_LINKS,
 209         _my_nla_put_u16, _parse_u16, _print_u16},
 210         {"mesh_max_retries",
 211         NL80211_MESHCONF_MAX_RETRIES,
 212         _my_nla_put_u8, _parse_u8, _print_u8},
 213         {"mesh_ttl",
 214         NL80211_MESHCONF_TTL,
 215         _my_nla_put_u8, _parse_u8, _print_u8},
 216         {"mesh_element_ttl",
 217         NL80211_MESHCONF_ELEMENT_TTL,
 218         _my_nla_put_u8, _parse_u8, _print_u8},
 219         {"mesh_auto_open_plinks",
 220         NL80211_MESHCONF_AUTO_OPEN_PLINKS,
 221         _my_nla_put_u8, _parse_u8_as_bool, _print_u8},
 222         {"mesh_hwmp_max_preq_retries",
 223         NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
 224         _my_nla_put_u8, _parse_u8, _print_u8},
 225         {"mesh_path_refresh_time",
 226         NL80211_MESHCONF_PATH_REFRESH_TIME,
 227         _my_nla_put_u32, _parse_u32, _print_u32_timeout},
 228         {"mesh_min_discovery_timeout",
 229         NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
 230         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 231         {"mesh_hwmp_active_path_timeout",
 232         NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
 233         _my_nla_put_u32, _parse_u32, _print_u32_in_TUs},
 234         {"mesh_hwmp_preq_min_interval",
 235         NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
 236         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 237         {"mesh_hwmp_net_diameter_traversal_time",
 238         NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
 239         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 240         {"mesh_hwmp_rootmode", NL80211_MESHCONF_HWMP_ROOTMODE,
 241         _my_nla_put_u8, _parse_u8, _print_u8},
 242         {"mesh_hwmp_rann_interval", NL80211_MESHCONF_HWMP_RANN_INTERVAL,
 243         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 244         {"mesh_gate_announcements", NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
 245         _my_nla_put_u8, _parse_u8, _print_u8},
 246         {"mesh_fwding", NL80211_MESHCONF_FORWARDING,
 247         _my_nla_put_u8, _parse_u8_as_bool, _print_u8},
 248         {"mesh_sync_offset_max_neighor",
 249         NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
 250         _my_nla_put_u32, _parse_u32, _print_u32},
 251         {"mesh_rssi_threshold", NL80211_MESHCONF_RSSI_THRESHOLD,
 252         _my_nla_put_u32, _parse_s32, _print_s32_in_dBm},
 253         {"mesh_hwmp_active_path_to_root_timeout",
 254         NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
 255         _my_nla_put_u32, _parse_u32, _print_u32_in_TUs},
 256         {"mesh_hwmp_root_interval", NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
 257         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 258         {"mesh_hwmp_confirmation_interval",
 259         NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
 260         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 261         {"mesh_power_mode", NL80211_MESHCONF_POWER_MODE,
 262         _my_nla_put_u32, _parse_u32_power_mode, _print_u32_power_mode},
 263         {"mesh_awake_window", NL80211_MESHCONF_AWAKE_WINDOW,
 264         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 265         {"mesh_plink_timeout", NL80211_MESHCONF_PLINK_TIMEOUT,
 266         _my_nla_put_u32, _parse_u32, _print_u32_in_seconds},
 267 };
 268
 269 static void print_all_mesh_param_descr(void)
 270 {
 271         unsigned int i;
 272
 273         printf("Possible mesh parameters are:\n");
 274
 275         for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++)
 276                 printf(" - %s\n", _mesh_param_descrs[i].name);
 277 }
 278
 279 static const struct mesh_param_descr *find_mesh_param(const char *name)
 280 {
 281         unsigned int i;
 282
 283         /* Find out what mesh parameter we want to change. */
 284         for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
 285                 if (strcmp(_mesh_param_descrs[i].name, name) == 0)
 286                         return _mesh_param_descrs + i;
 287         }
 288
 289         return NULL;
 290 }
 291
 292 /* Setter */
 293 static int set_interface_meshparam(struct nl80211_state *state,
 294                                    struct nl_msg *msg,
 295                                    int argc, char **argv,
 296                                    enum id_input id)
 297 {
 298         const struct mesh_param_descr *mdescr;
 299         struct nlattr *container;
 300         uint32_t ret;
 301         int err;
 302
 303         container = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
 304         if (!container)
 305                 return -ENOBUFS;
 306
 307         if (!argc) {
 308                 print_all_mesh_param_descr();
 309                 return 1;
 310         }
 311
 312         while (argc) {
 313                 const char *name;
 314                 char *value;
 315                 _any any;
 316
 317                 memset(&any, 0, sizeof(_any));
 318
 319                 name = argv[0];
 320                 value = strchr(name, '=');
 321                 if (value) {
 322                         *value = '\0';
 323                         value++;
 324                         argc--;
 325                         argv++;
 326                 } else {
 327                         /* backward compat -- accept w/o '=' */
 328                         if (argc < 2) {
 329                                 printf("Must specify a value for %s.\n", name);
 330                                 return 2;
 331                         }
 332                         value = argv[1];
 333                         argc -= 2;
 334                         argv += 2;
 335                 }
 336
 337                 mdescr = find_mesh_param(name);
 338                 if (!mdescr) {
 339                         printf("Could not find the parameter %s.\n", name);
 340                         print_all_mesh_param_descr();
 341                         return 2;
 342                 }
 343
 344                 /* Parse the new value */
 345                 ret = mdescr->parse_fn(value, &any);
 346                 if (ret != 0) {
 347                         if (mdescr->mesh_param_num
 348                             == NL80211_MESHCONF_POWER_MODE)
 349                                 printf("%s must be set to active, light or "
 350                                         "deep.\n", mdescr->name);
 351                         else
 352                                 printf("%s must be set to a number "
 353                                         "between 0 and %u\n",
 354                                         mdescr->name, ret);
 355
 356                         return 2;
 357                 }
 358
 359                 err = mdescr->nla_put_fn(msg, mdescr->mesh_param_num, &any);
 360                 if (err)
 361                         return err;
 362         }
 363         nla_nest_end(msg, container);
 364
 365         return err;
 366 }
 367
 368 COMMAND(set, mesh_param, "<param>=<value> [<param>=<value>]*",
 369         NL80211_CMD_SET_MESH_PARAMS, 0, CIB_NETDEV, set_interface_meshparam,
 370         "Set mesh parameter (run command without any to see available ones).");
 371
 372 /* Getter */
 373 static int print_mesh_param_handler(struct nl_msg *msg, void *arg)
 374 {
 375         const struct mesh_param_descr *mdescr = arg;
 376         struct nlattr *attrs[NL80211_ATTR_MAX + 1];
 377         struct nlattr *parent_attr;
 378         struct nlattr *mesh_params[NL80211_MESHCONF_ATTR_MAX + 1];
 379         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 380
 381         /* locate NL80211_ATTR_MESH_PARAMS */
 382         nla_parse(attrs, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 383                   genlmsg_attrlen(gnlh, 0), NULL);
 384         parent_attr = attrs[NL80211_ATTR_MESH_PARAMS];
 385         if (!parent_attr)
 386                 return -EINVAL;
 387
 388         /* unpack the mesh parameters */
 389         if (nla_parse_nested(mesh_params, NL80211_MESHCONF_ATTR_MAX,
 390                              parent_attr, NULL))
 391                 return -EINVAL;
 392
 393         if (!mdescr) {
 394                 unsigned int i;
 395
 396                 for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
 397                         mdescr = &_mesh_param_descrs[i];
 398                         printf("%s = ", mdescr->name);
 399                         mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
 400                         printf("\n");
 401                 }
 402                 return NL_SKIP;
 403         }
 404
 405         /* print out the mesh parameter */
 406         mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
 407         printf("\n");
 408         return NL_SKIP;
 409 }
 410
 411 static int get_interface_meshparam(struct nl80211_state *state,
 412                                    struct nl_msg *msg,
 413                                    int argc, char **argv,
 414                                    enum id_input id)
 415 {
 416         const struct mesh_param_descr *mdescr = NULL;
 417
 418         if (argc == 0) {
 419                 print_all_mesh_param_descr();
 420                 return 1;
 421         } else if (argc == 1) {
 422                 mdescr = find_mesh_param(argv[0]);
 423                 if (!mdescr) {
 424                         printf("Could not find the parameter %s.\n", argv[0]);
 425                         print_all_mesh_param_descr();
 426                         return 2;
 427                 }
 428         } else {
 429                 return 1;
 430         }
 431
 432         register_handler(print_mesh_param_handler, (void *)mdescr);
 433         return 0;
 434 }
 435
 436 COMMAND(get, mesh_param, "[<param>]",
 437         NL80211_CMD_GET_MESH_PARAMS, 0, CIB_NETDEV, get_interface_meshparam,
 438         "Retrieve mesh parameter (run command without any to see available ones).");
 439
 440 static int join_mesh(struct nl80211_state *state,
 441                      struct nl_msg *msg, int argc, char **argv,
 442                      enum id_input id)
 443 {
 444         struct nlattr *container;
 445         float rate;
 446         unsigned char rates[NL80211_MAX_SUPP_RATES];
 447         int bintval, dtim_period, n_rates = 0;
 448         char *end, *value = NULL, *sptr = NULL;
 449
 450         if (argc < 1)
 451                 return 1;
 452
 453         NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(argv[0]), argv[0]);
 454         argc--;
 455         argv++;
 456
 457         /* freq */
 458         if (argc > 1 && strcmp(argv[0], "freq") == 0) {
 459                 struct chandef chandef;
 460                 int err, parsed;
 461
 462                 err = parse_freqchan(&chandef, false, argc - 1, argv + 1,
 463                                      &parsed);
 464                 if (err)
 465                         return err;
 466
 467                 argv += parsed + 1;
 468                 argc -= parsed + 1;
 469
 470                 err = put_chandef(msg, &chandef);
 471                 if (err)
 472                         return err;
 473         }
 474
 475         /* basic rates */
 476         if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
 477                 argv++;
 478                 argc--;
 479
 480                 value = strtok_r(argv[0], ",", &sptr);
 481
 482                 while (value && n_rates < NL80211_MAX_SUPP_RATES) {
 483                         rate = strtod(value, &end);
 484                         rates[n_rates] = rate * 2;
 485
 486                         /* filter out suspicious values  */
 487                         if (*end != '\0' || !rates[n_rates] ||
 488                             rate*2 != rates[n_rates])
 489                                 return 1;
 490
 491                         n_rates++;
 492                         value = strtok_r(NULL, ",", &sptr);
 493                 }
 494
 495                 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);
 496                 argv++;
 497                 argc--;
 498         }
 499
 500         /* multicast rate */
 501         if (argc > 1 && strcmp(argv[0], "mcast-rate") == 0) {
 502                 argv++;
 503                 argc--;
 504
 505                 rate = strtod(argv[0], &end);
 506                 if (*end != '\0')
 507                         return 1;
 508
 509                 NLA_PUT_U32(msg, NL80211_ATTR_MCAST_RATE, (int)(rate * 10));
 510                 argv++;
 511                 argc--;
 512         }
 513
 514         if (argc > 1 && strcmp(argv[0], "beacon-interval") == 0) {
 515                 argc--;
 516                 argv++;
 517
 518                 bintval = strtoul(argv[0], &end, 10);
 519                 if (*end != '\0')
 520                         return 1;
 521
 522                 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, bintval);
 523                 argv++;
 524                 argc--;
 525         }
 526
 527         if (argc > 1 && strcmp(argv[0], "dtim-period") == 0) {
 528                 argc--;
 529                 argv++;
 530
 531                 dtim_period = strtoul(argv[0], &end, 10);
 532                 if (*end != '\0')
 533                         return 1;
 534
 535                 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
 536                 argv++;
 537                 argc--;
 538         }
 539
 540         container = nla_nest_start(msg, NL80211_ATTR_MESH_SETUP);
 541         if (!container)
 542                 return -ENOBUFS;
 543
 544         if (argc > 1 && strcmp(argv[0], "vendor_sync") == 0) {
 545                 argv++;
 546                 argc--;
 547                 if (strcmp(argv[0], "on") == 0)
 548                         NLA_PUT_U8(msg,
 549                                    NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC, 1);
 550                 else
 551                         NLA_PUT_U8(msg,
 552                                    NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC, 0);
 553                 argv++;
 554                 argc--;
 555         }
 556         /* parse and put other NL80211_ATTR_MESH_SETUP elements here */
 557
 558         nla_nest_end(msg, container);
 559
 560         if (!argc)
 561                 return 0;
 562         return set_interface_meshparam(state, msg, argc, argv, id);
 563  nla_put_failure:
 564         return -ENOBUFS;
 565 }
 566 COMMAND(mesh, join, "<mesh ID> [[freq <freq in MHz> <NOHT|HT20|HT40+|HT40-|80MHz>]"
 567         " [basic-rates <rate in Mbps,rate2,...>]], [mcast-rate <rate in Mbps>]"
 568         " [beacon-interval <time in TUs>] [dtim-period <value>]"
 569         " [vendor_sync on|off] [<param>=<value>]*",
 570         NL80211_CMD_JOIN_MESH, 0, CIB_NETDEV, join_mesh,
 571         "Join a mesh with the given mesh ID with frequency, basic-rates,\n"
 572         "mcast-rate and mesh parameters. Basic-rates are applied only if\n"
 573         "frequency is provided.");
 574
 575 static int leave_mesh(struct nl80211_state *state,
 576                       struct nl_msg *msg, int argc, char **argv,
 577                       enum id_input id)
 578 {
 579         if (argc)
 580                 return 1;
 581
 582         return 0;
 583 }
 584 COMMAND(mesh, leave, NULL, NL80211_CMD_LEAVE_MESH, 0, CIB_NETDEV, leave_mesh,
 585         "Leave a mesh.");