mesh.c

   1 #include <net/if.h>
   2 #include <errno.h>
   3 #include <string.h>
   4
   5 #include <netlink/genl/genl.h>
   6 #include <netlink/genl/family.h>
   7 #include <netlink/genl/ctrl.h>
   8 #include <netlink/msg.h>
   9 #include <netlink/attr.h>
  10
  11 #include "nl80211.h"
  12 #include "iw.h"
  13
  14 SECTION(mesh);
  15
  16
  17 typedef struct _any_t {
  18         union {
  19                 uint32_t as_32;
  20                 int32_t as_s32;
  21                 uint16_t as_16;
  22                 uint8_t as_8;
  23         } u;
  24 } _any;
  25
  26 /* describes a mesh parameter */
  27 struct mesh_param_descr {
  28         const char *name;
  29         enum nl80211_meshconf_params mesh_param_num;
  30         int (*nla_put_fn)(struct nl_msg*, int, _any*);
  31         uint32_t (*parse_fn)(const char*, _any*);
  32         void (*nla_print_fn)(struct nlattr *);
  33 };
  34
  35 /* utility functions for manipulating and printing u8/u16/u32 values and
  36  * timesouts. */
  37 static int _my_nla_put_u8(struct nl_msg *n, int mesh_param_num, _any *value)
  38 {
  39         return nla_put(n, mesh_param_num, sizeof(uint8_t), &value->u.as_8);
  40 }
  41
  42 static int _my_nla_put_u16(struct nl_msg *n, int mesh_param_num, _any *value)
  43 {
  44         return nla_put(n, mesh_param_num, sizeof(uint16_t), &value->u.as_16);
  45 }
  46
  47 static int _my_nla_put_u32(struct nl_msg *n, int mesh_param_num, _any *value)
  48 {
  49         return nla_put(n, mesh_param_num, sizeof(uint32_t), &value->u.as_32);
  50 }
  51
  52 static uint32_t _parse_u8(const char *str, _any *ret)
  53 {
  54         char *endptr = NULL;
  55         unsigned long int v = strtoul(str, &endptr, 10);
  56         if (*endptr != '\0')
  57                 return 0xff;
  58         if (v > 0xff)
  59                 return 0xff;
  60         ret->u.as_8 = (uint8_t)v;
  61         return 0;
  62 }
  63
  64 static uint32_t _parse_u8_as_bool(const char *str, _any *ret)
  65 {
  66         char *endptr = NULL;
  67         unsigned long int v = strtoul(str, &endptr, 10);
  68         if (*endptr != '\0')
  69                 return 0x1;
  70         if (v > 0x1)
  71                 return 0x1;
  72         ret->u.as_8 = (uint8_t)v;
  73         return 0;
  74 }
  75
  76 static uint32_t _parse_u16(const char *str, _any *ret)
  77 {
  78         char *endptr = NULL;
  79         long int v = strtol(str, &endptr, 10);
  80         if (*endptr != '\0')
  81                 return 0xffff;
  82         if ((v < 0) || (v > 0xffff))
  83                 return 0xffff;
  84         ret->u.as_16 = (uint16_t)v;
  85         return 0;
  86 }
  87
  88 static uint32_t _parse_u32(const char *str, _any *ret)
  89 {
  90         char *endptr = NULL;
  91         long long int v = strtoll(str, &endptr, 10);
  92         if (*endptr != '\0')
  93                 return 0xffffffff;
  94         if ((v < 0) || (v > 0xffffffff))
  95                 return 0xffffffff;
  96         ret->u.as_32 = (uint32_t)v;
  97         return 0;
  98 }
  99
 100 static uint32_t _parse_s32(const char *str, _any *ret)
 101 {
 102         char *endptr = NULL;
 103         long int v = strtol(str, &endptr, 10);
 104         if (*endptr != '\0')
 105                 return 0xffffffff;
 106         if (v > 0xff)
 107                 return 0xffffffff;
 108         ret->u.as_s32 = (int32_t)v;
 109         return 0;
 110 }
 111
 112 static uint32_t _parse_u32_power_mode(const char *str, _any *ret)
 113 {
 114         unsigned long int v;
 115
 116         /* Parse attribute for the name of power mode */
 117         if (!strcmp(str, "active"))
 118                 v = NL80211_MESH_POWER_ACTIVE;
 119         else if (!strcmp(str, "light"))
 120                 v = NL80211_MESH_POWER_LIGHT_SLEEP;
 121         else if (!strcmp(str, "deep"))
 122                 v = NL80211_MESH_POWER_DEEP_SLEEP;
 123         else
 124                 return 0xff;
 125
 126         ret->u.as_32 = (uint32_t)v;
 127         return 0;
 128 }
 129
 130 static void _print_u8(struct nlattr *a)
 131 {
 132         printf("%d", nla_get_u8(a));
 133 }
 134
 135 static void _print_u16(struct nlattr *a)
 136 {
 137         printf("%d", nla_get_u16(a));
 138 }
 139
 140 static void _print_u16_timeout(struct nlattr *a)
 141 {
 142         printf("%d milliseconds", nla_get_u16(a));
 143 }
 144
 145 static void _print_u16_in_TUs(struct nlattr *a)
 146 {
 147         printf("%d TUs", nla_get_u16(a));
 148 }
 149
 150 static void _print_u32(struct nlattr *a)
 151 {
 152         printf("%d", nla_get_u32(a));
 153 }
 154
 155 static void _print_u32_timeout(struct nlattr *a)
 156 {
 157         printf("%u milliseconds", nla_get_u32(a));
 158 }
 159
 160 static void _print_u32_in_seconds(struct nlattr *a)
 161 {
 162         printf("%d seconds", nla_get_u32(a));
 163 }
 164
 165 static void _print_u32_in_TUs(struct nlattr *a)
 166 {
 167         printf("%d TUs", nla_get_u32(a));
 168 }
 169
 170 static void _print_u32_power_mode(struct nlattr *a)
 171 {
 172         unsigned long v = nla_get_u32(a);
 173
 174         switch (v) {
 175         case NL80211_MESH_POWER_ACTIVE:
 176                 printf("active");
 177                 break;
 178         case NL80211_MESH_POWER_LIGHT_SLEEP:
 179                 printf("light");
 180                 break;
 181         case NL80211_MESH_POWER_DEEP_SLEEP:
 182                 printf("deep");
 183                 break;
 184         default:
 185                 printf("undefined");
 186                 break;
 187         }
 188 }
 189
 190 static void _print_s32_in_dBm(struct nlattr *a)
 191 {
 192         printf("%d dBm", (int32_t) nla_get_u32(a));
 193 }
 194
 195
 196 /* The current mesh parameters */
 197 const static struct mesh_param_descr _mesh_param_descrs[] =
 198 {
 199         {"mesh_retry_timeout",
 200         NL80211_MESHCONF_RETRY_TIMEOUT,
 201         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 202         {"mesh_confirm_timeout",
 203         NL80211_MESHCONF_CONFIRM_TIMEOUT,
 204         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 205         {"mesh_holding_timeout",
 206         NL80211_MESHCONF_HOLDING_TIMEOUT,
 207         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 208         {"mesh_max_peer_links",
 209         NL80211_MESHCONF_MAX_PEER_LINKS,
 210         _my_nla_put_u16, _parse_u16, _print_u16},
 211         {"mesh_max_retries",
 212         NL80211_MESHCONF_MAX_RETRIES,
 213         _my_nla_put_u8, _parse_u8, _print_u8},
 214         {"mesh_ttl",
 215         NL80211_MESHCONF_TTL,
 216         _my_nla_put_u8, _parse_u8, _print_u8},
 217         {"mesh_element_ttl",
 218         NL80211_MESHCONF_ELEMENT_TTL,
 219         _my_nla_put_u8, _parse_u8, _print_u8},
 220         {"mesh_auto_open_plinks",
 221         NL80211_MESHCONF_AUTO_OPEN_PLINKS,
 222         _my_nla_put_u8, _parse_u8_as_bool, _print_u8},
 223         {"mesh_hwmp_max_preq_retries",
 224         NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
 225         _my_nla_put_u8, _parse_u8, _print_u8},
 226         {"mesh_path_refresh_time",
 227         NL80211_MESHCONF_PATH_REFRESH_TIME,
 228         _my_nla_put_u32, _parse_u32, _print_u32_timeout},
 229         {"mesh_min_discovery_timeout",
 230         NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
 231         _my_nla_put_u16, _parse_u16, _print_u16_timeout},
 232         {"mesh_hwmp_active_path_timeout",
 233         NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
 234         _my_nla_put_u32, _parse_u32, _print_u32_in_TUs},
 235         {"mesh_hwmp_preq_min_interval",
 236         NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
 237         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 238         {"mesh_hwmp_net_diameter_traversal_time",
 239         NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
 240         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 241         {"mesh_hwmp_rootmode", NL80211_MESHCONF_HWMP_ROOTMODE,
 242         _my_nla_put_u8, _parse_u8, _print_u8},
 243         {"mesh_hwmp_rann_interval", NL80211_MESHCONF_HWMP_RANN_INTERVAL,
 244         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 245         {"mesh_gate_announcements", NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
 246         _my_nla_put_u8, _parse_u8, _print_u8},
 247         {"mesh_fwding", NL80211_MESHCONF_FORWARDING,
 248         _my_nla_put_u8, _parse_u8_as_bool, _print_u8},
 249         {"mesh_sync_offset_max_neighor",
 250         NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
 251         _my_nla_put_u32, _parse_u32, _print_u32},
 252         {"mesh_rssi_threshold", NL80211_MESHCONF_RSSI_THRESHOLD,
 253         _my_nla_put_u32, _parse_s32, _print_s32_in_dBm},
 254         {"mesh_hwmp_active_path_to_root_timeout",
 255         NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
 256         _my_nla_put_u32, _parse_u32, _print_u32_in_TUs},
 257         {"mesh_hwmp_root_interval", NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
 258         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 259         {"mesh_hwmp_confirmation_interval",
 260         NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
 261         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 262         {"mesh_power_mode", NL80211_MESHCONF_POWER_MODE,
 263         _my_nla_put_u32, _parse_u32_power_mode, _print_u32_power_mode},
 264         {"mesh_awake_window", NL80211_MESHCONF_AWAKE_WINDOW,
 265         _my_nla_put_u16, _parse_u16, _print_u16_in_TUs},
 266         {"mesh_plink_timeout", NL80211_MESHCONF_PLINK_TIMEOUT,
 267         _my_nla_put_u32, _parse_u32, _print_u32_in_seconds},
 268 };
 269
 270 static void print_all_mesh_param_descr(void)
 271 {
 272         int i;
 273
 274         printf("Possible mesh parameters are:\n");
 275
 276         for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++)
 277                 printf(" - %s\n", _mesh_param_descrs[i].name);
 278 }
 279
 280 static const struct mesh_param_descr *find_mesh_param(const char *name)
 281 {
 282         int i;
 283
 284         /* Find out what mesh parameter we want to change. */
 285         for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
 286                 if (strcmp(_mesh_param_descrs[i].name, name) == 0)
 287                         return _mesh_param_descrs + i;
 288         }
 289
 290         print_all_mesh_param_descr();
 291         return NULL;
 292 }
 293
 294 /* Setter */
 295 static int set_interface_meshparam(struct nl80211_state *state,
 296                                    struct nl_msg *msg,
 297                                    int argc, char **argv,
 298                                    enum id_input id)
 299 {
 300         const struct mesh_param_descr *mdescr;
 301         struct nlattr *container;
 302         uint32_t ret;
 303         int err;
 304
 305         container = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
 306         if (!container)
 307                 return -ENOBUFS;
 308
 309         if (!argc)
 310                 return 1;
 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                         return 2;
 340
 341                 /* Parse the new value */
 342                 ret = mdescr->parse_fn(value, &any);
 343                 if (ret != 0) {
 344                         if (mdescr->mesh_param_num
 345                             == NL80211_MESHCONF_POWER_MODE)
 346                                 printf("%s must be set to active, light or "
 347                                         "deep.\n", mdescr->name);
 348                         else
 349                                 printf("%s must be set to a number "
 350                                         "between 0 and %u\n",
 351                                         mdescr->name, ret);
 352
 353                         return 2;
 354                 }
 355
 356                 err = mdescr->nla_put_fn(msg, mdescr->mesh_param_num, &any);
 357                 if (err)
 358                         return err;
 359         }
 360         nla_nest_end(msg, container);
 361
 362         return err;
 363 }
 364
 365 COMMAND(set, mesh_param, "<param>=<value> [<param>=<value>]*",
 366         NL80211_CMD_SET_MESH_PARAMS, 0, CIB_NETDEV, set_interface_meshparam,
 367         "Set mesh parameter (run command without any to see available ones).");
 368
 369 /* Getter */
 370 static int print_mesh_param_handler(struct nl_msg *msg, void *arg)
 371 {
 372         const struct mesh_param_descr *mdescr = arg;
 373         struct nlattr *attrs[NL80211_ATTR_MAX + 1];
 374         struct nlattr *parent_attr;
 375         struct nlattr *mesh_params[NL80211_MESHCONF_ATTR_MAX + 1];
 376         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 377
 378         /* locate NL80211_ATTR_MESH_PARAMS */
 379         nla_parse(attrs, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 380                   genlmsg_attrlen(gnlh, 0), NULL);
 381         parent_attr = attrs[NL80211_ATTR_MESH_PARAMS];
 382         if (!parent_attr)
 383                 return -EINVAL;
 384
 385         /* unpack the mesh parameters */
 386         if (nla_parse_nested(mesh_params, NL80211_MESHCONF_ATTR_MAX,
 387                              parent_attr, NULL))
 388                 return -EINVAL;
 389
 390         if (!mdescr) {
 391                 int i;
 392
 393                 for (i = 0; i < ARRAY_SIZE(_mesh_param_descrs); i++) {
 394                         mdescr = &_mesh_param_descrs[i];
 395                         printf("%s = ", mdescr->name);
 396                         mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
 397                         printf("\n");
 398                 }
 399                 return NL_SKIP;
 400         }
 401
 402         /* print out the mesh parameter */
 403         mdescr->nla_print_fn(mesh_params[mdescr->mesh_param_num]);
 404         printf("\n");
 405         return NL_SKIP;
 406 }
 407
 408 static int get_interface_meshparam(struct nl80211_state *state,
 409                                    struct nl_msg *msg,
 410                                    int argc, char **argv,
 411                                    enum id_input id)
 412 {
 413         const struct mesh_param_descr *mdescr = NULL;
 414
 415         if (argc > 1)
 416                 return 1;
 417
 418         if (argc == 1) {
 419                 mdescr = find_mesh_param(argv[0]);
 420                 if (!mdescr)
 421                         return 2;
 422         }
 423
 424         register_handler(print_mesh_param_handler, (void *)mdescr);
 425         return 0;
 426 }
 427
 428 COMMAND(get, mesh_param, "[<param>]",
 429         NL80211_CMD_GET_MESH_PARAMS, 0, CIB_NETDEV, get_interface_meshparam,
 430         "Retrieve mesh parameter (run command without any to see available ones).");
 431
 432 static int join_mesh(struct nl80211_state *state,
 433                      struct nl_msg *msg, int argc, char **argv,
 434                      enum id_input id)
 435 {
 436         struct nlattr *container;
 437         float rate;
 438         unsigned char rates[NL80211_MAX_SUPP_RATES];
 439         int bintval, dtim_period, i, n_rates = 0;
 440         char *end, *value = NULL, *sptr = NULL;
 441         unsigned long freq = 0;
 442         static const struct {
 443                 const char *name;
 444                 unsigned int width;
 445                 int freq1_diff;
 446                 int chantype; /* for older kernel */
 447         } *chanmode_selected = NULL, chanmode[] = {
 448                 { .name = "HT20",
 449                   .width = NL80211_CHAN_WIDTH_20,
 450                   .freq1_diff = 0,
 451                   .chantype = NL80211_CHAN_HT20 },
 452                 { .name = "HT40+",
 453                   .width = NL80211_CHAN_WIDTH_40,
 454                   .freq1_diff = 10,
 455                   .chantype = NL80211_CHAN_HT40PLUS },
 456                 { .name = "HT40-",
 457                   .width = NL80211_CHAN_WIDTH_40,
 458                   .freq1_diff = -10,
 459                   .chantype = NL80211_CHAN_HT40MINUS },
 460                 { .name = "NOHT",
 461                   .width = NL80211_CHAN_WIDTH_20_NOHT,
 462                   .freq1_diff = 0,
 463                   .chantype = NL80211_CHAN_NO_HT },
 464         };
 465
 466         if (argc < 1)
 467                 return 1;
 468
 469         NLA_PUT(msg, NL80211_ATTR_MESH_ID, strlen(argv[0]), argv[0]);
 470         argc--;
 471         argv++;
 472
 473         /* freq */
 474         if (argc > 1 && strcmp(argv[0], "freq") == 0) {
 475                 argv++;
 476                 argc--;
 477
 478                 freq = strtoul(argv[0], &end, 10);
 479                 if (*end != '\0')
 480                         return 1;
 481                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
 482
 483                 argv++;
 484                 argc--;
 485         }
 486
 487         /* channel type */
 488         if (argc) {
 489                 for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
 490                         if (strcasecmp(chanmode[i].name, argv[0]) == 0) {
 491                                 chanmode_selected = &chanmode[i];
 492                                 break;
 493                         }
 494                 }
 495
 496                 if (chanmode_selected) {
 497                         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH,
 498                                     chanmode_selected->width);
 499                         NLA_PUT_U32(msg, NL80211_ATTR_CENTER_FREQ1,
 500                                     freq + chanmode_selected->freq1_diff);
 501                         if (chanmode_selected->chantype != -1)
 502                                 NLA_PUT_U32(msg,
 503                                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 504                                             chanmode_selected->chantype);
 505
 506                         argv++;
 507                         argc--;
 508                 }
 509         }
 510
 511         /* basic rates */
 512         if (argc > 1 && strcmp(argv[0], "basic-rates") == 0) {
 513                 argv++;
 514                 argc--;
 515
 516                 value = strtok_r(argv[0], ",", &sptr);
 517
 518                 while (value && n_rates < NL80211_MAX_SUPP_RATES) {
 519                         rate = strtod(value, &end);
 520                         rates[n_rates] = rate * 2;
 521
 522                         /* filter out suspicious values  */
 523                         if (*end != '\0' || !rates[n_rates] ||
 524                             rate*2 != rates[n_rates])
 525                                 return 1;
 526
 527                         n_rates++;
 528                         value = strtok_r(NULL, ",", &sptr);
 529                 }
 530
 531                 NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, n_rates, rates);
 532                 argv++;
 533                 argc--;
 534         }
 535
 536         /* multicast rate */
 537         if (argc > 1 && strcmp(argv[0], "mcast-rate") == 0) {
 538                 argv++;
 539                 argc--;
 540
 541                 rate = strtod(argv[0], &end);
 542                 if (*end != '\0')
 543                         return 1;
 544
 545                 NLA_PUT_U32(msg, NL80211_ATTR_MCAST_RATE, (int)(rate * 10));
 546                 argv++;
 547                 argc--;
 548         }
 549
 550         if (argc > 1 && strcmp(argv[0], "beacon-interval") == 0) {
 551                 argc--;
 552                 argv++;
 553
 554                 bintval = strtoul(argv[0], &end, 10);
 555                 if (*end != '\0')
 556                         return 1;
 557
 558                 NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, bintval);
 559                 argv++;
 560                 argc--;
 561         }
 562
 563         if (argc > 1 && strcmp(argv[0], "dtim-period") == 0) {
 564                 argc--;
 565                 argv++;
 566
 567                 dtim_period = strtoul(argv[0], &end, 10);
 568                 if (*end != '\0')
 569                         return 1;
 570
 571                 NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
 572                 argv++;
 573                 argc--;
 574         }
 575
 576         container = nla_nest_start(msg, NL80211_ATTR_MESH_SETUP);
 577         if (!container)
 578                 return -ENOBUFS;
 579
 580         if (argc > 1 && strcmp(argv[0], "vendor_sync") == 0) {
 581                 argv++;
 582                 argc--;
 583                 if (strcmp(argv[0], "on") == 0)
 584                         NLA_PUT_U8(msg,
 585                                    NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC, 1);
 586                 else
 587                         NLA_PUT_U8(msg,
 588                                    NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC, 0);
 589                 argv++;
 590                 argc--;
 591         }
 592         /* parse and put other NL80211_ATTR_MESH_SETUP elements here */
 593
 594         nla_nest_end(msg, container);
 595
 596         if (!argc)
 597                 return 0;
 598         return set_interface_meshparam(state, msg, argc, argv, id);
 599  nla_put_failure:
 600         return -ENOBUFS;
 601 }
 602 COMMAND(mesh, join, "<mesh ID> [[freq <freq in MHz> <HT20|HT40+|HT40-|NOHT>]"
 603         " [basic-rates <rate in Mbps,rate2,...>]], [mcast-rate <rate in Mbps>]"
 604         " [beacon-interval <time in TUs>] [dtim-period <value>]"
 605         " [vendor_sync on|off] [<param>=<value>]*",
 606         NL80211_CMD_JOIN_MESH, 0, CIB_NETDEV, join_mesh,
 607         "Join a mesh with the given mesh ID with frequency, basic-rates,\n"
 608         "mcast-rate and mesh parameters. Basic-rates are applied only if\n"
 609         "frequency is provided.");
 610
 611 static int leave_mesh(struct nl80211_state *state,
 612                       struct nl_msg *msg, int argc, char **argv,
 613                       enum id_input id)
 614 {
 615         if (argc)
 616                 return 1;
 617
 618         return 0;
 619 }
 620 COMMAND(mesh, leave, NULL, NL80211_CMD_LEAVE_MESH, 0, CIB_NETDEV, leave_mesh,
 621         "Leave a mesh.");