station.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(station);
  15
  16 enum plink_state {
  17         LISTEN,
  18         OPN_SNT,
  19         OPN_RCVD,
  20         CNF_RCVD,
  21         ESTAB,
  22         HOLDING,
  23         BLOCKED
  24 };
  25
  26 static void print_power_mode(struct nlattr *a)
  27 {
  28         enum nl80211_mesh_power_mode pm = nla_get_u32(a);
  29
  30         switch (pm) {
  31         case NL80211_MESH_POWER_ACTIVE:
  32                 printf("ACTIVE");
  33                 break;
  34         case NL80211_MESH_POWER_LIGHT_SLEEP:
  35                 printf("LIGHT SLEEP");
  36                 break;
  37         case NL80211_MESH_POWER_DEEP_SLEEP:
  38                 printf("DEEP SLEEP");
  39                 break;
  40         default:
  41                 printf("UNKNOWN");
  42                 break;
  43         }
  44 }
  45
  46 void parse_tx_bitrate(struct nlattr *bitrate_attr, char *buf, int buflen)
  47 {
  48         int rate = 0;
  49         char *pos = buf;
  50         struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
  51         static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
  52                 [NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
  53                 [NL80211_RATE_INFO_BITRATE32] = { .type = NLA_U32 },
  54                 [NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
  55                 [NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
  56                 [NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
  57         };
  58
  59         if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
  60                              bitrate_attr, rate_policy)) {
  61                 snprintf(buf, buflen, "failed to parse nested rate attributes!");
  62                 return;
  63         }
  64
  65         if (rinfo[NL80211_RATE_INFO_BITRATE32])
  66                 rate = nla_get_u32(rinfo[NL80211_RATE_INFO_BITRATE32]);
  67         else if (rinfo[NL80211_RATE_INFO_BITRATE])
  68                 rate = nla_get_u16(rinfo[NL80211_RATE_INFO_BITRATE]);
  69         if (rate > 0)
  70                 pos += snprintf(pos, buflen - (pos - buf),
  71                                 "%d.%d MBit/s", rate / 10, rate % 10);
  72
  73         if (rinfo[NL80211_RATE_INFO_MCS])
  74                 pos += snprintf(pos, buflen - (pos - buf),
  75                                 " MCS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_MCS]));
  76         if (rinfo[NL80211_RATE_INFO_VHT_MCS])
  77                 pos += snprintf(pos, buflen - (pos - buf),
  78                                 " VHT-MCS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_VHT_MCS]));
  79         if (rinfo[NL80211_RATE_INFO_40_MHZ_WIDTH])
  80                 pos += snprintf(pos, buflen - (pos - buf), " 40MHz");
  81         if (rinfo[NL80211_RATE_INFO_80_MHZ_WIDTH])
  82                 pos += snprintf(pos, buflen - (pos - buf), " 80MHz");
  83         if (rinfo[NL80211_RATE_INFO_80P80_MHZ_WIDTH])
  84                 pos += snprintf(pos, buflen - (pos - buf), " 80P80MHz");
  85         if (rinfo[NL80211_RATE_INFO_160_MHZ_WIDTH])
  86                 pos += snprintf(pos, buflen - (pos - buf), " 160MHz");
  87         if (rinfo[NL80211_RATE_INFO_SHORT_GI])
  88                 pos += snprintf(pos, buflen - (pos - buf), " short GI");
  89         if (rinfo[NL80211_RATE_INFO_VHT_NSS])
  90                 pos += snprintf(pos, buflen - (pos - buf),
  91                                 " VHT-NSS %d", nla_get_u8(rinfo[NL80211_RATE_INFO_VHT_NSS]));
  92 }
  93
  94 static int print_sta_handler(struct nl_msg *msg, void *arg)
  95 {
  96         struct nlattr *tb[NL80211_ATTR_MAX + 1];
  97         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
  98         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
  99         char mac_addr[20], state_name[10], dev[20];
 100         struct nl80211_sta_flag_update *sta_flags;
 101         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 102                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 103                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 104                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 105                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
 106                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
 107                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
 108                 [NL80211_STA_INFO_T_OFFSET] = { .type = NLA_U64 },
 109                 [NL80211_STA_INFO_TX_BITRATE] = { .type = NLA_NESTED },
 110                 [NL80211_STA_INFO_LLID] = { .type = NLA_U16 },
 111                 [NL80211_STA_INFO_PLID] = { .type = NLA_U16 },
 112                 [NL80211_STA_INFO_PLINK_STATE] = { .type = NLA_U8 },
 113                 [NL80211_STA_INFO_TX_RETRIES] = { .type = NLA_U32 },
 114                 [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
 115                 [NL80211_STA_INFO_STA_FLAGS] =
 116                         { .minlen = sizeof(struct nl80211_sta_flag_update) },
 117                 [NL80211_STA_INFO_LOCAL_PM] = { .type = NLA_U32},
 118                 [NL80211_STA_INFO_PEER_PM] = { .type = NLA_U32},
 119                 [NL80211_STA_INFO_NONPEER_PM] = { .type = NLA_U32},
 120         };
 121
 122         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 123                   genlmsg_attrlen(gnlh, 0), NULL);
 124
 125         /*
 126          * TODO: validate the interface and mac address!
 127          * Otherwise, there's a race condition as soon as
 128          * the kernel starts sending station notifications.
 129          */
 130
 131         if (!tb[NL80211_ATTR_STA_INFO]) {
 132                 fprintf(stderr, "sta stats missing!\n");
 133                 return NL_SKIP;
 134         }
 135         if (nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
 136                              tb[NL80211_ATTR_STA_INFO],
 137                              stats_policy)) {
 138                 fprintf(stderr, "failed to parse nested attributes!\n");
 139                 return NL_SKIP;
 140         }
 141
 142         mac_addr_n2a(mac_addr, nla_data(tb[NL80211_ATTR_MAC]));
 143         if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
 144         printf("Station %s (on %s)", mac_addr, dev);
 145
 146         if (sinfo[NL80211_STA_INFO_INACTIVE_TIME])
 147                 printf("\n\tinactive time:\t%u ms",
 148                         nla_get_u32(sinfo[NL80211_STA_INFO_INACTIVE_TIME]));
 149         if (sinfo[NL80211_STA_INFO_RX_BYTES])
 150                 printf("\n\trx bytes:\t%u",
 151                         nla_get_u32(sinfo[NL80211_STA_INFO_RX_BYTES]));
 152         if (sinfo[NL80211_STA_INFO_RX_PACKETS])
 153                 printf("\n\trx packets:\t%u",
 154                         nla_get_u32(sinfo[NL80211_STA_INFO_RX_PACKETS]));
 155         if (sinfo[NL80211_STA_INFO_TX_BYTES])
 156                 printf("\n\ttx bytes:\t%u",
 157                         nla_get_u32(sinfo[NL80211_STA_INFO_TX_BYTES]));
 158         if (sinfo[NL80211_STA_INFO_TX_PACKETS])
 159                 printf("\n\ttx packets:\t%u",
 160                         nla_get_u32(sinfo[NL80211_STA_INFO_TX_PACKETS]));
 161         if (sinfo[NL80211_STA_INFO_TX_RETRIES])
 162                 printf("\n\ttx retries:\t%u",
 163                         nla_get_u32(sinfo[NL80211_STA_INFO_TX_RETRIES]));
 164         if (sinfo[NL80211_STA_INFO_TX_FAILED])
 165                 printf("\n\ttx failed:\t%u",
 166                         nla_get_u32(sinfo[NL80211_STA_INFO_TX_FAILED]));
 167         if (sinfo[NL80211_STA_INFO_SIGNAL])
 168                 printf("\n\tsignal:  \t%d dBm",
 169                         (int8_t)nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]));
 170         if (sinfo[NL80211_STA_INFO_SIGNAL_AVG])
 171                 printf("\n\tsignal avg:\t%d dBm",
 172                         (int8_t)nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]));
 173         if (sinfo[NL80211_STA_INFO_T_OFFSET])
 174                 printf("\n\tToffset:\t%lld us",
 175                         (unsigned long long)nla_get_u64(sinfo[NL80211_STA_INFO_T_OFFSET]));
 176
 177         if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
 178                 char buf[100];
 179
 180                 parse_tx_bitrate(sinfo[NL80211_STA_INFO_TX_BITRATE], buf, sizeof(buf));
 181                 printf("\n\ttx bitrate:\t%s", buf);
 182         }
 183
 184         if (sinfo[NL80211_STA_INFO_LLID])
 185                 printf("\n\tmesh llid:\t%d",
 186                         nla_get_u16(sinfo[NL80211_STA_INFO_LLID]));
 187         if (sinfo[NL80211_STA_INFO_PLID])
 188                 printf("\n\tmesh plid:\t%d",
 189                         nla_get_u16(sinfo[NL80211_STA_INFO_PLID]));
 190         if (sinfo[NL80211_STA_INFO_PLINK_STATE]) {
 191                 switch (nla_get_u8(sinfo[NL80211_STA_INFO_PLINK_STATE])) {
 192                 case LISTEN:
 193                         strcpy(state_name, "LISTEN");
 194                         break;
 195                 case OPN_SNT:
 196                         strcpy(state_name, "OPN_SNT");
 197                         break;
 198                 case OPN_RCVD:
 199                         strcpy(state_name, "OPN_RCVD");
 200                         break;
 201                 case CNF_RCVD:
 202                         strcpy(state_name, "CNF_RCVD");
 203                         break;
 204                 case ESTAB:
 205                         strcpy(state_name, "ESTAB");
 206                         break;
 207                 case HOLDING:
 208                         strcpy(state_name, "HOLDING");
 209                         break;
 210                 case BLOCKED:
 211                         strcpy(state_name, "BLOCKED");
 212                         break;
 213                 default:
 214                         strcpy(state_name, "UNKNOWN");
 215                         break;
 216                 }
 217                 printf("\n\tmesh plink:\t%s", state_name);
 218         }
 219         if (sinfo[NL80211_STA_INFO_LOCAL_PM]) {
 220                 printf("\n\tmesh local PS mode:\t");
 221                 print_power_mode(sinfo[NL80211_STA_INFO_LOCAL_PM]);
 222         }
 223         if (sinfo[NL80211_STA_INFO_PEER_PM]) {
 224                 printf("\n\tmesh peer PS mode:\t");
 225                 print_power_mode(sinfo[NL80211_STA_INFO_PEER_PM]);
 226         }
 227         if (sinfo[NL80211_STA_INFO_NONPEER_PM]) {
 228                 printf("\n\tmesh non-peer PS mode:\t");
 229                 print_power_mode(sinfo[NL80211_STA_INFO_NONPEER_PM]);
 230         }
 231
 232         if (sinfo[NL80211_STA_INFO_STA_FLAGS]) {
 233                 sta_flags = (struct nl80211_sta_flag_update *)
 234                             nla_data(sinfo[NL80211_STA_INFO_STA_FLAGS]);
 235
 236                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {
 237                         printf("\n\tauthorized:\t");
 238                         if (sta_flags->set & BIT(NL80211_STA_FLAG_AUTHORIZED))
 239                                 printf("yes");
 240                         else
 241                                 printf("no");
 242                 }
 243
 244                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
 245                         printf("\n\tauthenticated:\t");
 246                         if (sta_flags->set & BIT(NL80211_STA_FLAG_AUTHENTICATED))
 247                                 printf("yes");
 248                         else
 249                                 printf("no");
 250                 }
 251
 252                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {
 253                         printf("\n\tpreamble:\t");
 254                         if (sta_flags->set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))
 255                                 printf("short");
 256                         else
 257                                 printf("long");
 258                 }
 259
 260                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_WME)) {
 261                         printf("\n\tWMM/WME:\t");
 262                         if (sta_flags->set & BIT(NL80211_STA_FLAG_WME))
 263                                 printf("yes");
 264                         else
 265                                 printf("no");
 266                 }
 267
 268                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_MFP)) {
 269                         printf("\n\tMFP:\t\t");
 270                         if (sta_flags->set & BIT(NL80211_STA_FLAG_MFP))
 271                                 printf("yes");
 272                         else
 273                                 printf("no");
 274                 }
 275
 276                 if (sta_flags->mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {
 277                         printf("\n\tTDLS peer:\t");
 278                         if (sta_flags->set & BIT(NL80211_STA_FLAG_TDLS_PEER))
 279                                 printf("yes");
 280                         else
 281                                 printf("no");
 282                 }
 283         }
 284
 285         printf("\n");
 286         return NL_SKIP;
 287 }
 288
 289 static int handle_station_get(struct nl80211_state *state,
 290                               struct nl_cb *cb,
 291                               struct nl_msg *msg,
 292                               int argc, char **argv,
 293                               enum id_input id)
 294 {
 295         unsigned char mac_addr[ETH_ALEN];
 296
 297         if (argc < 1)
 298                 return 1;
 299
 300         if (mac_addr_a2n(mac_addr, argv[0])) {
 301                 fprintf(stderr, "invalid mac address\n");
 302                 return 2;
 303         }
 304
 305         argc--;
 306         argv++;
 307
 308         if (argc)
 309                 return 1;
 310
 311         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 312
 313         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_sta_handler, NULL);
 314
 315         return 0;
 316  nla_put_failure:
 317         return -ENOBUFS;
 318 }
 319 COMMAND(station, get, "<MAC address>",
 320         NL80211_CMD_GET_STATION, 0, CIB_NETDEV, handle_station_get,
 321         "Get information for a specific station.");
 322 COMMAND(station, del, "<MAC address>",
 323         NL80211_CMD_DEL_STATION, 0, CIB_NETDEV, handle_station_get,
 324         "Remove the given station entry (use with caution!)");
 325
 326 static const struct cmd *station_set_plink;
 327 static const struct cmd *station_set_vlan;
 328 static const struct cmd *station_set_mesh_power_mode;
 329
 330 static const struct cmd *select_station_cmd(int argc, char **argv)
 331 {
 332         if (argc < 2)
 333                 return NULL;
 334         if (strcmp(argv[1], "plink_action") == 0)
 335                 return station_set_plink;
 336         if (strcmp(argv[1], "vlan") == 0)
 337                 return station_set_vlan;
 338         if (strcmp(argv[1], "mesh_power_mode") == 0)
 339                 return station_set_mesh_power_mode;
 340         return NULL;
 341 }
 342
 343 static int handle_station_set_plink(struct nl80211_state *state,
 344                               struct nl_cb *cb,
 345                               struct nl_msg *msg,
 346                               int argc, char **argv,
 347                               enum id_input id)
 348 {
 349         unsigned char plink_action;
 350         unsigned char mac_addr[ETH_ALEN];
 351
 352         if (argc < 3)
 353                 return 1;
 354
 355         if (mac_addr_a2n(mac_addr, argv[0])) {
 356                 fprintf(stderr, "invalid mac address\n");
 357                 return 2;
 358         }
 359         argc--;
 360         argv++;
 361
 362         if (strcmp("plink_action", argv[0]) != 0)
 363                 return 1;
 364         argc--;
 365         argv++;
 366
 367         if (strcmp("open", argv[0]) == 0)
 368                 plink_action = NL80211_PLINK_ACTION_OPEN;
 369         else if (strcmp("block", argv[0]) == 0)
 370                 plink_action = NL80211_PLINK_ACTION_BLOCK;
 371         else {
 372                 fprintf(stderr, "plink action not supported\n");
 373                 return 2;
 374         }
 375         argc--;
 376         argv++;
 377
 378         if (argc)
 379                 return 1;
 380
 381         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 382         NLA_PUT_U8(msg, NL80211_ATTR_STA_PLINK_ACTION, plink_action);
 383
 384         return 0;
 385  nla_put_failure:
 386         return -ENOBUFS;
 387 }
 388 COMMAND_ALIAS(station, set, "<MAC address> plink_action <open|block>",
 389         NL80211_CMD_SET_STATION, 0, CIB_NETDEV, handle_station_set_plink,
 390         "Set mesh peer link action for this station (peer).",
 391         select_station_cmd, station_set_plink);
 392
 393 static int handle_station_set_vlan(struct nl80211_state *state,
 394                                    struct nl_cb *cb,
 395                                    struct nl_msg *msg,
 396                                    int argc, char **argv,
 397                                    enum id_input id)
 398 {
 399         unsigned char mac_addr[ETH_ALEN];
 400         unsigned long sta_vlan = 0;
 401         char *err = NULL;
 402
 403         if (argc < 3)
 404                 return 1;
 405
 406         if (mac_addr_a2n(mac_addr, argv[0])) {
 407                 fprintf(stderr, "invalid mac address\n");
 408                 return 2;
 409         }
 410         argc--;
 411         argv++;
 412
 413         if (strcmp("vlan", argv[0]) != 0)
 414                 return 1;
 415         argc--;
 416         argv++;
 417
 418         sta_vlan = strtoul(argv[0], &err, 0);
 419         if (err && *err) {
 420                 fprintf(stderr, "invalid vlan id\n");
 421                 return 2;
 422         }
 423         argc--;
 424         argv++;
 425
 426         if (argc)
 427                 return 1;
 428
 429         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 430         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN, sta_vlan);
 431
 432         return 0;
 433  nla_put_failure:
 434         return -ENOBUFS;
 435 }
 436 COMMAND_ALIAS(station, set, "<MAC address> vlan <ifindex>",
 437         NL80211_CMD_SET_STATION, 0, CIB_NETDEV, handle_station_set_vlan,
 438         "Set an AP VLAN for this station.",
 439         select_station_cmd, station_set_vlan);
 440
 441 static int handle_station_set_mesh_power_mode(struct nl80211_state *state,
 442                                               struct nl_cb *cb,
 443                                               struct nl_msg *msg,
 444                                               int argc, char **argv,
 445                                               enum id_input id)
 446 {
 447         unsigned char mesh_power_mode;
 448         unsigned char mac_addr[ETH_ALEN];
 449
 450         if (argc < 3)
 451                 return 1;
 452
 453         if (mac_addr_a2n(mac_addr, argv[0])) {
 454                 fprintf(stderr, "invalid mac address\n");
 455                 return 2;
 456         }
 457         argc--;
 458         argv++;
 459
 460         if (strcmp("mesh_power_mode", argv[0]) != 0)
 461                 return 1;
 462         argc--;
 463         argv++;
 464
 465         if (strcmp("active", argv[0]) == 0)
 466                 mesh_power_mode = NL80211_MESH_POWER_ACTIVE;
 467         else if (strcmp("light", argv[0]) == 0)
 468                 mesh_power_mode = NL80211_MESH_POWER_LIGHT_SLEEP;
 469         else if (strcmp("deep", argv[0]) == 0)
 470                 mesh_power_mode = NL80211_MESH_POWER_DEEP_SLEEP;
 471         else {
 472                 fprintf(stderr, "unknown mesh power mode\n");
 473                 return 2;
 474         }
 475         argc--;
 476         argv++;
 477
 478         if (argc)
 479                 return 1;
 480
 481         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
 482         NLA_PUT_U32(msg, NL80211_ATTR_LOCAL_MESH_POWER_MODE, mesh_power_mode);
 483
 484         return 0;
 485 nla_put_failure:
 486         return -ENOBUFS;
 487 }
 488 COMMAND_ALIAS(station, set, "<MAC address> mesh_power_mode "
 489         "<active|light|deep>", NL80211_CMD_SET_STATION, 0, CIB_NETDEV,
 490         handle_station_set_mesh_power_mode,
 491         "Set link-specific mesh power mode for this station",
 492         select_station_cmd, station_set_mesh_power_mode);
 493
 494 static int handle_station_dump(struct nl80211_state *state,
 495                                struct nl_cb *cb,
 496                                struct nl_msg *msg,
 497                                int argc, char **argv,
 498                                enum id_input id)
 499 {
 500         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_sta_handler, NULL);
 501         return 0;
 502 }
 503 COMMAND(station, dump, NULL,
 504         NL80211_CMD_GET_STATION, NLM_F_DUMP, CIB_NETDEV, handle_station_dump,
 505         "List all stations known, e.g. the AP on managed interfaces");