util.c

   1 #include <ctype.h>
   2 #include <netlink/attr.h>
   3 #include <errno.h>
   4 #include <stdbool.h>
   5 #include "iw.h"
   6 #include "nl80211.h"
   7
   8 void mac_addr_n2a(char *mac_addr, unsigned char *arg)
   9 {
  10         int i, l;
  11
  12         l = 0;
  13         for (i = 0; i < ETH_ALEN ; i++) {
  14                 if (i == 0) {
  15                         sprintf(mac_addr+l, "%02x", arg[i]);
  16                         l += 2;
  17                 } else {
  18                         sprintf(mac_addr+l, ":%02x", arg[i]);
  19                         l += 3;
  20                 }
  21         }
  22 }
  23
  24 int mac_addr_a2n(unsigned char *mac_addr, char *arg)
  25 {
  26         int i;
  27
  28         for (i = 0; i < ETH_ALEN ; i++) {
  29                 int temp;
  30                 char *cp = strchr(arg, ':');
  31                 if (cp) {
  32                         *cp = 0;
  33                         cp++;
  34                 }
  35                 if (sscanf(arg, "%x", &temp) != 1)
  36                         return -1;
  37                 if (temp < 0 || temp > 255)
  38                         return -1;
  39
  40                 mac_addr[i] = temp;
  41                 if (!cp)
  42                         break;
  43                 arg = cp;
  44         }
  45         if (i < ETH_ALEN - 1)
  46                 return -1;
  47
  48         return 0;
  49 }
  50
  51 int parse_hex_mask(char *hexmask, unsigned char **result, size_t *result_len,
  52                    unsigned char **mask)
  53 {
  54         size_t len = strlen(hexmask) / 2;
  55         unsigned char *result_val;
  56         unsigned char *result_mask = NULL;
  57
  58         int pos = 0;
  59
  60         *result_len = 0;
  61
  62         result_val = calloc(len + 2, 1);
  63         if (!result_val)
  64                 goto error;
  65         *result = result_val;
  66         if (mask) {
  67                 result_mask = calloc(DIV_ROUND_UP(len, 8) + 2, 1);
  68                 if (!result_mask)
  69                         goto error;
  70                 *mask = result_mask;
  71         }
  72
  73         while (1) {
  74                 char *cp = strchr(hexmask, ':');
  75                 if (cp) {
  76                         *cp = 0;
  77                         cp++;
  78                 }
  79
  80                 if (result_mask && (strcmp(hexmask, "-") == 0 ||
  81                                     strcmp(hexmask, "xx") == 0 ||
  82                                     strcmp(hexmask, "--") == 0)) {
  83                         /* skip this byte and leave mask bit unset */
  84                 } else {
  85                         int temp, mask_pos;
  86                         char *end;
  87
  88                         temp = strtoul(hexmask, &end, 16);
  89                         if (*end)
  90                                 goto error;
  91                         if (temp < 0 || temp > 255)
  92                                 goto error;
  93                         result_val[pos] = temp;
  94
  95                         mask_pos = pos / 8;
  96                         if (result_mask)
  97                                 result_mask[mask_pos] |= 1 << (pos % 8);
  98                 }
  99
 100                 (*result_len)++;
 101                 pos++;
 102
 103                 if (!cp)
 104                         break;
 105                 hexmask = cp;
 106         }
 107
 108         return 0;
 109  error:
 110         free(result_val);
 111         free(result_mask);
 112         return -1;
 113 }
 114
 115 unsigned char *parse_hex(char *hex, size_t *outlen)
 116 {
 117         unsigned char *result;
 118
 119         if (parse_hex_mask(hex, &result, outlen, NULL))
 120                 return NULL;
 121         return result;
 122 }
 123
 124 static const char *ifmodes[NL80211_IFTYPE_MAX + 1] = {
 125         "unspecified",
 126         "IBSS",
 127         "managed",
 128         "AP",
 129         "AP/VLAN",
 130         "WDS",
 131         "monitor",
 132         "mesh point",
 133         "P2P-client",
 134         "P2P-GO",
 135         "P2P-device",
 136         "outside context of a BSS",
 137         "NAN",
 138 };
 139
 140 static char modebuf[100];
 141
 142 const char *iftype_name(enum nl80211_iftype iftype)
 143 {
 144         if (iftype <= NL80211_IFTYPE_MAX && ifmodes[iftype])
 145                 return ifmodes[iftype];
 146         sprintf(modebuf, "Unknown mode (%d)", iftype);
 147         return modebuf;
 148 }
 149
 150 static const char *commands[NL80211_CMD_MAX + 1] = {
 151 /*
 152  * sed 's%^\tNL80211_CMD_%%;t n;d;:n s%^\([^=]*\),.*%\t[NL80211_CMD_\1] = \"\L\1\",%;t;d' nl80211.h | grep -v "reserved"
 153  */
 154         [NL80211_CMD_UNSPEC] = "unspec",
 155         [NL80211_CMD_GET_WIPHY] = "get_wiphy",
 156         [NL80211_CMD_SET_WIPHY] = "set_wiphy",
 157         [NL80211_CMD_NEW_WIPHY] = "new_wiphy",
 158         [NL80211_CMD_DEL_WIPHY] = "del_wiphy",
 159         [NL80211_CMD_GET_INTERFACE] = "get_interface",
 160         [NL80211_CMD_SET_INTERFACE] = "set_interface",
 161         [NL80211_CMD_NEW_INTERFACE] = "new_interface",
 162         [NL80211_CMD_DEL_INTERFACE] = "del_interface",
 163         [NL80211_CMD_GET_KEY] = "get_key",
 164         [NL80211_CMD_SET_KEY] = "set_key",
 165         [NL80211_CMD_NEW_KEY] = "new_key",
 166         [NL80211_CMD_DEL_KEY] = "del_key",
 167         [NL80211_CMD_GET_BEACON] = "get_beacon",
 168         [NL80211_CMD_SET_BEACON] = "set_beacon",
 169         [NL80211_CMD_START_AP] = "start_ap",
 170         [NL80211_CMD_STOP_AP] = "stop_ap",
 171         [NL80211_CMD_GET_STATION] = "get_station",
 172         [NL80211_CMD_SET_STATION] = "set_station",
 173         [NL80211_CMD_NEW_STATION] = "new_station",
 174         [NL80211_CMD_DEL_STATION] = "del_station",
 175         [NL80211_CMD_GET_MPATH] = "get_mpath",
 176         [NL80211_CMD_SET_MPATH] = "set_mpath",
 177         [NL80211_CMD_NEW_MPATH] = "new_mpath",
 178         [NL80211_CMD_DEL_MPATH] = "del_mpath",
 179         [NL80211_CMD_SET_BSS] = "set_bss",
 180         [NL80211_CMD_SET_REG] = "set_reg",
 181         [NL80211_CMD_REQ_SET_REG] = "req_set_reg",
 182         [NL80211_CMD_GET_MESH_CONFIG] = "get_mesh_config",
 183         [NL80211_CMD_SET_MESH_CONFIG] = "set_mesh_config",
 184         [NL80211_CMD_GET_REG] = "get_reg",
 185         [NL80211_CMD_GET_SCAN] = "get_scan",
 186         [NL80211_CMD_TRIGGER_SCAN] = "trigger_scan",
 187         [NL80211_CMD_NEW_SCAN_RESULTS] = "new_scan_results",
 188         [NL80211_CMD_SCAN_ABORTED] = "scan_aborted",
 189         [NL80211_CMD_REG_CHANGE] = "reg_change",
 190         [NL80211_CMD_AUTHENTICATE] = "authenticate",
 191         [NL80211_CMD_ASSOCIATE] = "associate",
 192         [NL80211_CMD_DEAUTHENTICATE] = "deauthenticate",
 193         [NL80211_CMD_DISASSOCIATE] = "disassociate",
 194         [NL80211_CMD_MICHAEL_MIC_FAILURE] = "michael_mic_failure",
 195         [NL80211_CMD_REG_BEACON_HINT] = "reg_beacon_hint",
 196         [NL80211_CMD_JOIN_IBSS] = "join_ibss",
 197         [NL80211_CMD_LEAVE_IBSS] = "leave_ibss",
 198         [NL80211_CMD_TESTMODE] = "testmode",
 199         [NL80211_CMD_CONNECT] = "connect",
 200         [NL80211_CMD_ROAM] = "roam",
 201         [NL80211_CMD_DISCONNECT] = "disconnect",
 202         [NL80211_CMD_SET_WIPHY_NETNS] = "set_wiphy_netns",
 203         [NL80211_CMD_GET_SURVEY] = "get_survey",
 204         [NL80211_CMD_NEW_SURVEY_RESULTS] = "new_survey_results",
 205         [NL80211_CMD_SET_PMKSA] = "set_pmksa",
 206         [NL80211_CMD_DEL_PMKSA] = "del_pmksa",
 207         [NL80211_CMD_FLUSH_PMKSA] = "flush_pmksa",
 208         [NL80211_CMD_REMAIN_ON_CHANNEL] = "remain_on_channel",
 209         [NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL] = "cancel_remain_on_channel",
 210         [NL80211_CMD_SET_TX_BITRATE_MASK] = "set_tx_bitrate_mask",
 211         [NL80211_CMD_REGISTER_FRAME] = "register_frame",
 212         [NL80211_CMD_FRAME] = "frame",
 213         [NL80211_CMD_FRAME_TX_STATUS] = "frame_tx_status",
 214         [NL80211_CMD_SET_POWER_SAVE] = "set_power_save",
 215         [NL80211_CMD_GET_POWER_SAVE] = "get_power_save",
 216         [NL80211_CMD_SET_CQM] = "set_cqm",
 217         [NL80211_CMD_NOTIFY_CQM] = "notify_cqm",
 218         [NL80211_CMD_SET_CHANNEL] = "set_channel",
 219         [NL80211_CMD_SET_WDS_PEER] = "set_wds_peer",
 220         [NL80211_CMD_FRAME_WAIT_CANCEL] = "frame_wait_cancel",
 221         [NL80211_CMD_JOIN_MESH] = "join_mesh",
 222         [NL80211_CMD_LEAVE_MESH] = "leave_mesh",
 223         [NL80211_CMD_UNPROT_DEAUTHENTICATE] = "unprot_deauthenticate",
 224         [NL80211_CMD_UNPROT_DISASSOCIATE] = "unprot_disassociate",
 225         [NL80211_CMD_NEW_PEER_CANDIDATE] = "new_peer_candidate",
 226         [NL80211_CMD_GET_WOWLAN] = "get_wowlan",
 227         [NL80211_CMD_SET_WOWLAN] = "set_wowlan",
 228         [NL80211_CMD_START_SCHED_SCAN] = "start_sched_scan",
 229         [NL80211_CMD_STOP_SCHED_SCAN] = "stop_sched_scan",
 230         [NL80211_CMD_SCHED_SCAN_RESULTS] = "sched_scan_results",
 231         [NL80211_CMD_SCHED_SCAN_STOPPED] = "sched_scan_stopped",
 232         [NL80211_CMD_SET_REKEY_OFFLOAD] = "set_rekey_offload",
 233         [NL80211_CMD_PMKSA_CANDIDATE] = "pmksa_candidate",
 234         [NL80211_CMD_TDLS_OPER] = "tdls_oper",
 235         [NL80211_CMD_TDLS_MGMT] = "tdls_mgmt",
 236         [NL80211_CMD_UNEXPECTED_FRAME] = "unexpected_frame",
 237         [NL80211_CMD_PROBE_CLIENT] = "probe_client",
 238         [NL80211_CMD_REGISTER_BEACONS] = "register_beacons",
 239         [NL80211_CMD_UNEXPECTED_4ADDR_FRAME] = "unexpected_4addr_frame",
 240         [NL80211_CMD_SET_NOACK_MAP] = "set_noack_map",
 241         [NL80211_CMD_CH_SWITCH_NOTIFY] = "ch_switch_notify",
 242         [NL80211_CMD_START_P2P_DEVICE] = "start_p2p_device",
 243         [NL80211_CMD_STOP_P2P_DEVICE] = "stop_p2p_device",
 244         [NL80211_CMD_CONN_FAILED] = "conn_failed",
 245         [NL80211_CMD_SET_MCAST_RATE] = "set_mcast_rate",
 246         [NL80211_CMD_SET_MAC_ACL] = "set_mac_acl",
 247         [NL80211_CMD_RADAR_DETECT] = "radar_detect",
 248         [NL80211_CMD_GET_PROTOCOL_FEATURES] = "get_protocol_features",
 249         [NL80211_CMD_UPDATE_FT_IES] = "update_ft_ies",
 250         [NL80211_CMD_FT_EVENT] = "ft_event",
 251         [NL80211_CMD_CRIT_PROTOCOL_START] = "crit_protocol_start",
 252         [NL80211_CMD_CRIT_PROTOCOL_STOP] = "crit_protocol_stop",
 253         [NL80211_CMD_GET_COALESCE] = "get_coalesce",
 254         [NL80211_CMD_SET_COALESCE] = "set_coalesce",
 255         [NL80211_CMD_CHANNEL_SWITCH] = "channel_switch",
 256         [NL80211_CMD_VENDOR] = "vendor",
 257         [NL80211_CMD_SET_QOS_MAP] = "set_qos_map",
 258         [NL80211_CMD_ADD_TX_TS] = "add_tx_ts",
 259         [NL80211_CMD_DEL_TX_TS] = "del_tx_ts",
 260         [NL80211_CMD_GET_MPP] = "get_mpp",
 261         [NL80211_CMD_JOIN_OCB] = "join_ocb",
 262         [NL80211_CMD_LEAVE_OCB] = "leave_ocb",
 263         [NL80211_CMD_CH_SWITCH_STARTED_NOTIFY] = "ch_switch_started_notify",
 264         [NL80211_CMD_TDLS_CHANNEL_SWITCH] = "tdls_channel_switch",
 265         [NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH] = "tdls_cancel_channel_switch",
 266         [NL80211_CMD_WIPHY_REG_CHANGE] = "wiphy_reg_change",
 267         [NL80211_CMD_ABORT_SCAN] = "abort_scan",
 268         [NL80211_CMD_START_NAN] = "start_nan",
 269         [NL80211_CMD_STOP_NAN] = "stop_nan",
 270         [NL80211_CMD_ADD_NAN_FUNCTION] = "add_nan_function",
 271         [NL80211_CMD_DEL_NAN_FUNCTION] = "del_nan_function",
 272         [NL80211_CMD_CHANGE_NAN_CONFIG] = "change_nan_config",
 273         [NL80211_CMD_NAN_MATCH] = "nan_match",
 274 };
 275
 276 static char cmdbuf[100];
 277
 278 const char *command_name(enum nl80211_commands cmd)
 279 {
 280         if (cmd <= NL80211_CMD_MAX && commands[cmd])
 281                 return commands[cmd];
 282         sprintf(cmdbuf, "Unknown command (%d)", cmd);
 283         return cmdbuf;
 284 }
 285
 286 int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
 287 {
 288         /* see 802.11 17.3.8.3.2 and Annex J
 289          * there are overlapping channel numbers in 5GHz and 2GHz bands */
 290         if (chan <= 0)
 291                 return 0; /* not supported */
 292         switch (band) {
 293         case NL80211_BAND_2GHZ:
 294                 if (chan == 14)
 295                         return 2484;
 296                 else if (chan < 14)
 297                         return 2407 + chan * 5;
 298                 break;
 299         case NL80211_BAND_5GHZ:
 300                 if (chan >= 182 && chan <= 196)
 301                         return 4000 + chan * 5;
 302                 else
 303                         return 5000 + chan * 5;
 304                 break;
 305         case NL80211_BAND_60GHZ:
 306                 if (chan < 5)
 307                         return 56160 + chan * 2160;
 308                 break;
 309         default:
 310                 ;
 311         }
 312         return 0; /* not supported */
 313 }
 314
 315 int ieee80211_frequency_to_channel(int freq)
 316 {
 317         /* see 802.11-2007 17.3.8.3.2 and Annex J */
 318         if (freq == 2484)
 319                 return 14;
 320         else if (freq < 2484)
 321                 return (freq - 2407) / 5;
 322         else if (freq >= 4910 && freq <= 4980)
 323                 return (freq - 4000) / 5;
 324         else if (freq <= 45000) /* DMG band lower limit */
 325                 return (freq - 5000) / 5;
 326         else if (freq >= 58320 && freq <= 64800)
 327                 return (freq - 56160) / 2160;
 328         else
 329                 return 0;
 330 }
 331
 332 void print_ssid_escaped(const uint8_t len, const uint8_t *data)
 333 {
 334         int i;
 335
 336         for (i = 0; i < len; i++) {
 337                 if (isprint(data[i]) && data[i] != ' ' && data[i] != '\\')
 338                         printf("%c", data[i]);
 339                 else if (data[i] == ' ' &&
 340                          (i != 0 && i != len -1))
 341                         printf(" ");
 342                 else
 343                         printf("\\x%.2x", data[i]);
 344         }
 345 }
 346
 347 static int hex2num(char digit)
 348 {
 349         if (!isxdigit(digit))
 350                 return -1;
 351         if (isdigit(digit))
 352                 return digit - '0';
 353         return tolower(digit) - 'a' + 10;
 354 }
 355
 356 static int hex2byte(const char *hex)
 357 {
 358         int d1, d2;
 359
 360         d1 = hex2num(hex[0]);
 361         if (d1 < 0)
 362                 return -1;
 363         d2 = hex2num(hex[1]);
 364         if (d2 < 0)
 365                 return -1;
 366         return (d1 << 4) | d2;
 367 }
 368
 369 static char *hex2bin(const char *hex, char *buf)
 370 {
 371         char *result = buf;
 372         int d;
 373
 374         while (hex[0]) {
 375                 d = hex2byte(hex);
 376                 if (d < 0)
 377                         return NULL;
 378                 buf[0] = d;
 379                 buf++;
 380                 hex += 2;
 381         }
 382
 383         return result;
 384 }
 385
 386 int parse_keys(struct nl_msg *msg, char **argv, int argc)
 387 {
 388         struct nlattr *keys;
 389         int i = 0;
 390         bool have_default = false;
 391         char keybuf[13];
 392
 393         if (!argc)
 394                 return 1;
 395
 396         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
 397
 398         keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
 399         if (!keys)
 400                 return -ENOBUFS;
 401
 402         do {
 403                 char *arg = *argv;
 404                 int pos = 0, keylen;
 405                 struct nlattr *key = nla_nest_start(msg, ++i);
 406                 char *keydata;
 407
 408                 if (!key)
 409                         return -ENOBUFS;
 410
 411                 if (arg[pos] == 'd') {
 412                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
 413                         pos++;
 414                         if (arg[pos] == ':')
 415                                 pos++;
 416                         have_default = true;
 417                 }
 418
 419                 if (!isdigit(arg[pos]))
 420                         goto explain;
 421                 NLA_PUT_U8(msg, NL80211_KEY_IDX, arg[pos++] - '0');
 422                 if (arg[pos++] != ':')
 423                         goto explain;
 424                 keydata = arg + pos;
 425                 switch (strlen(keydata)) {
 426                 case 10:
 427                         keydata = hex2bin(keydata, keybuf);
 428                 case 5:
 429                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER, 0x000FAC01);
 430                         keylen = 5;
 431                         break;
 432                 case 26:
 433                         keydata = hex2bin(keydata, keybuf);
 434                 case 13:
 435                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER, 0x000FAC05);
 436                         keylen = 13;
 437                         break;
 438                 default:
 439                         goto explain;
 440                 }
 441
 442                 if (!keydata)
 443                         goto explain;
 444
 445                 NLA_PUT(msg, NL80211_KEY_DATA, keylen, keydata);
 446
 447                 argv++;
 448                 argc--;
 449
 450                 /* one key should be TX key */
 451                 if (!have_default && !argc)
 452                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
 453
 454                 nla_nest_end(msg, key);
 455         } while (argc);
 456
 457         nla_nest_end(msg, keys);
 458
 459         return 0;
 460  nla_put_failure:
 461         return -ENOBUFS;
 462  explain:
 463         fprintf(stderr, "key must be [d:]index:data where\n"
 464                         "  'd:'     means default (transmit) key\n"
 465                         "  'index:' is a single digit (0-3)\n"
 466                         "  'data'   must be 5 or 13 ascii chars\n"
 467                         "           or 10 or 26 hex digits\n"
 468                         "for example: d:2:6162636465 is the same as d:2:abcde\n");
 469         return 2;
 470 }
 471
 472 enum nl80211_chan_width str_to_bw(const char *str)
 473 {
 474         static const struct {
 475                 const char *name;
 476                 unsigned int val;
 477         } bwmap[] = {
 478                 { .name = "5", .val = NL80211_CHAN_WIDTH_5, },
 479                 { .name = "10", .val = NL80211_CHAN_WIDTH_10, },
 480                 { .name = "20", .val = NL80211_CHAN_WIDTH_20, },
 481                 { .name = "40", .val = NL80211_CHAN_WIDTH_40, },
 482                 { .name = "80", .val = NL80211_CHAN_WIDTH_80, },
 483                 { .name = "80+80", .val = NL80211_CHAN_WIDTH_80P80, },
 484                 { .name = "160", .val = NL80211_CHAN_WIDTH_160, },
 485         };
 486         unsigned int i;
 487
 488         for (i = 0; i < ARRAY_SIZE(bwmap); i++) {
 489                 if (strcasecmp(bwmap[i].name, str) == 0)
 490                         return bwmap[i].val;
 491         }
 492
 493         return NL80211_CHAN_WIDTH_20_NOHT;
 494 }
 495
 496 static int parse_freqs(struct chandef *chandef, int argc, char **argv,
 497                        int *parsed)
 498 {
 499         uint32_t freq;
 500         char *end;
 501         bool need_cf1 = false, need_cf2 = false;
 502
 503         if (argc < 1)
 504                 return 0;
 505
 506         chandef->width = str_to_bw(argv[0]);
 507
 508         switch (chandef->width) {
 509         case NL80211_CHAN_WIDTH_20_NOHT:
 510                 /* First argument was not understood, give up gracefully. */
 511                 return 0;
 512         case NL80211_CHAN_WIDTH_20:
 513         case NL80211_CHAN_WIDTH_5:
 514         case NL80211_CHAN_WIDTH_10:
 515                 break;
 516         case NL80211_CHAN_WIDTH_80P80:
 517                 need_cf2 = true;
 518                 /* fall through */
 519         case NL80211_CHAN_WIDTH_40:
 520         case NL80211_CHAN_WIDTH_80:
 521         case NL80211_CHAN_WIDTH_160:
 522                 need_cf1 = true;
 523                 break;
 524         }
 525
 526         *parsed += 1;
 527
 528         if (!need_cf1)
 529                 return 0;
 530
 531         if (argc < 2)
 532                 return 1;
 533
 534         /* center freq 1 */
 535         if (!*argv[1])
 536                 return 1;
 537         freq = strtoul(argv[1], &end, 10);
 538         if (*end)
 539                 return 1;
 540         *parsed += 1;
 541
 542         chandef->center_freq1 = freq;
 543
 544         if (!need_cf2)
 545                 return 0;
 546
 547         if (argc < 3)
 548                 return 1;
 549
 550         /* center freq 2 */
 551         if (!*argv[2])
 552                 return 1;
 553         freq = strtoul(argv[2], &end, 10);
 554         if (*end)
 555                 return 1;
 556         chandef->center_freq2 = freq;
 557
 558         *parsed += 1;
 559
 560         return 0;
 561 }
 562
 563
 564 /**
 565  * parse_freqchan - Parse frequency or channel definition
 566  *
 567  * @chandef: chandef structure to be filled in
 568  * @chan: Boolean whether to parse a channel or frequency based specifier
 569  * @argc: Number of arguments
 570  * @argv: Array of string arguments
 571  * @parsed: Pointer to return the number of used arguments, or NULL to error
 572  *          out if any argument is left unused.
 573  *
 574  * The given chandef structure will be filled in from the command line
 575  * arguments. argc/argv will be updated so that further arguments from the
 576  * command line can be parsed.
 577  *
 578  * Note that despite the fact that the function knows how many center freqs
 579  * are needed, there's an ambiguity if the next argument after this is an
 580  * integer argument, since the valid channel width values are interpreted
 581  * as such, rather than a following argument. This can be avoided by the
 582  * user by giving "NOHT" instead.
 583  *
 584  * The working specifier if chan is set are:
 585  *   <channel> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
 586  *
 587  * And if frequency is set:
 588  *   <freq> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
 589  *   <control freq> [5|10|20|40|80|80+80|160] [<center1_freq> [<center2_freq>]]
 590  *
 591  * If the mode/channel width is not given the NOHT is assumed.
 592  *
 593  * Return: Number of used arguments, zero or negative error number otherwise
 594  */
 595 int parse_freqchan(struct chandef *chandef, bool chan, int argc, char **argv,
 596                    int *parsed)
 597 {
 598         char *end;
 599         static const struct chanmode chanmode[] = {
 600                 { .name = "HT20",
 601                   .width = NL80211_CHAN_WIDTH_20,
 602                   .freq1_diff = 0,
 603                   .chantype = NL80211_CHAN_HT20 },
 604                 { .name = "HT40+",
 605                   .width = NL80211_CHAN_WIDTH_40,
 606                   .freq1_diff = 10,
 607                   .chantype = NL80211_CHAN_HT40PLUS },
 608                 { .name = "HT40-",
 609                   .width = NL80211_CHAN_WIDTH_40,
 610                   .freq1_diff = -10,
 611                   .chantype = NL80211_CHAN_HT40MINUS },
 612                 { .name = "NOHT",
 613                   .width = NL80211_CHAN_WIDTH_20_NOHT,
 614                   .freq1_diff = 0,
 615                   .chantype = NL80211_CHAN_NO_HT },
 616                 { .name = "5MHz",
 617                   .width = NL80211_CHAN_WIDTH_5,
 618                   .freq1_diff = 0,
 619                   .chantype = -1 },
 620                 { .name = "10MHz",
 621                   .width = NL80211_CHAN_WIDTH_10,
 622                   .freq1_diff = 0,
 623                   .chantype = -1 },
 624                 { .name = "80MHz",
 625                   .width = NL80211_CHAN_WIDTH_80,
 626                   .freq1_diff = 0,
 627                   .chantype = -1 },
 628         };
 629         const struct chanmode *chanmode_selected = NULL;
 630         unsigned int freq;
 631         unsigned int i;
 632         int _parsed = 0;
 633         int res = 0;
 634
 635         if (argc < 1)
 636                 return 1;
 637
 638         if (!argv[0])
 639                 goto out;
 640         freq = strtoul(argv[0], &end, 10);
 641         if (*end) {
 642                 res = 1;
 643                 goto out;
 644         }
 645
 646         _parsed += 1;
 647
 648         memset(chandef, 0, sizeof(struct chandef));
 649
 650         if (chan) {
 651                 enum nl80211_band band;
 652
 653                 band = freq <= 14 ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 654                 freq = ieee80211_channel_to_frequency(freq, band);
 655         }
 656         chandef->control_freq = freq;
 657         /* Assume 20MHz NOHT channel for now. */
 658         chandef->center_freq1 = freq;
 659
 660         /* Try to parse HT mode definitions */
 661         if (argc > 1) {
 662                 for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
 663                         if (strcasecmp(chanmode[i].name, argv[1]) == 0) {
 664                                 chanmode_selected = &chanmode[i];
 665                                 _parsed += 1;
 666                                 break;
 667                         }
 668                 }
 669         }
 670
 671         /* channel mode given, use it and return. */
 672         if (chanmode_selected) {
 673                 chandef->center_freq1 = get_cf1(chanmode_selected, freq);
 674                 chandef->width = chanmode_selected->width;
 675                 goto out;
 676         }
 677
 678         /* This was a only a channel definition, nothing further may follow. */
 679         if (chan)
 680                 goto out;
 681
 682         res = parse_freqs(chandef, argc - 1, argv + 1, &_parsed);
 683
 684  out:
 685         /* Error out if parsed is NULL. */
 686         if (!parsed && _parsed != argc)
 687                 return 1;
 688
 689         if (parsed)
 690                 *parsed = _parsed;
 691
 692         return res;
 693 }
 694
 695 int put_chandef(struct nl_msg *msg, struct chandef *chandef)
 696 {
 697         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chandef->control_freq);
 698         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width);
 699
 700         switch (chandef->width) {
 701         case NL80211_CHAN_WIDTH_20_NOHT:
 702                 NLA_PUT_U32(msg,
 703                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 704                             NL80211_CHAN_NO_HT);
 705                 break;
 706         case NL80211_CHAN_WIDTH_20:
 707                 NLA_PUT_U32(msg,
 708                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 709                             NL80211_CHAN_HT20);
 710                 break;
 711         case NL80211_CHAN_WIDTH_40:
 712                 if (chandef->control_freq > chandef->center_freq1)
 713                         NLA_PUT_U32(msg,
 714                                     NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 715                                     NL80211_CHAN_HT40MINUS);
 716                 else
 717                         NLA_PUT_U32(msg,
 718                                     NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 719                                     NL80211_CHAN_HT40PLUS);
 720                 break;
 721         default:
 722                 break;
 723         }
 724
 725         if (chandef->center_freq1)
 726                 NLA_PUT_U32(msg,
 727                             NL80211_ATTR_CENTER_FREQ1,
 728                             chandef->center_freq1);
 729
 730         if (chandef->center_freq2)
 731                 NLA_PUT_U32(msg,
 732                             NL80211_ATTR_CENTER_FREQ2,
 733                             chandef->center_freq2);
 734
 735         return 0;
 736
 737  nla_put_failure:
 738         return -ENOBUFS;
 739 }
 740
 741 static void print_mcs_index(const __u8 *mcs)
 742 {
 743         int mcs_bit, prev_bit = -2, prev_cont = 0;
 744
 745         for (mcs_bit = 0; mcs_bit <= 76; mcs_bit++) {
 746                 unsigned int mcs_octet = mcs_bit/8;
 747                 unsigned int MCS_RATE_BIT = 1 << mcs_bit % 8;
 748                 bool mcs_rate_idx_set;
 749
 750                 mcs_rate_idx_set = !!(mcs[mcs_octet] & MCS_RATE_BIT);
 751
 752                 if (!mcs_rate_idx_set)
 753                         continue;
 754
 755                 if (prev_bit != mcs_bit - 1) {
 756                         if (prev_bit != -2)
 757                                 printf("%d, ", prev_bit);
 758                         else
 759                                 printf(" ");
 760                         printf("%d", mcs_bit);
 761                         prev_cont = 0;
 762                 } else if (!prev_cont) {
 763                         printf("-");
 764                         prev_cont = 1;
 765                 }
 766
 767                 prev_bit = mcs_bit;
 768         }
 769
 770         if (prev_cont)
 771                 printf("%d", prev_bit);
 772         printf("\n");
 773 }
 774
 775 /*
 776  * There are only 4 possible values, we just use a case instead of computing it,
 777  * but technically this can also be computed through the formula:
 778  *
 779  * Max AMPDU length = (2 ^ (13 + exponent)) - 1 bytes
 780  */
 781 static __u32 compute_ampdu_length(__u8 exponent)
 782 {
 783         switch (exponent) {
 784         case 0: return 8191;  /* (2 ^(13 + 0)) -1 */
 785         case 1: return 16383; /* (2 ^(13 + 1)) -1 */
 786         case 2: return 32767; /* (2 ^(13 + 2)) -1 */
 787         case 3: return 65535; /* (2 ^(13 + 3)) -1 */
 788         default: return 0;
 789         }
 790 }
 791
 792 static const char *print_ampdu_space(__u8 space)
 793 {
 794         switch (space) {
 795         case 0: return "No restriction";
 796         case 1: return "1/4 usec";
 797         case 2: return "1/2 usec";
 798         case 3: return "1 usec";
 799         case 4: return "2 usec";
 800         case 5: return "4 usec";
 801         case 6: return "8 usec";
 802         case 7: return "16 usec";
 803         default:
 804                 return "BUG (spacing more than 3 bits!)";
 805         }
 806 }
 807
 808 void print_ampdu_length(__u8 exponent)
 809 {
 810         __u32 max_ampdu_length;
 811
 812         max_ampdu_length = compute_ampdu_length(exponent);
 813
 814         if (max_ampdu_length) {
 815                 printf("\t\tMaximum RX AMPDU length %d bytes (exponent: 0x0%02x)\n",
 816                        max_ampdu_length, exponent);
 817         } else {
 818                 printf("\t\tMaximum RX AMPDU length: unrecognized bytes "
 819                        "(exponent: %d)\n", exponent);
 820         }
 821 }
 822
 823 void print_ampdu_spacing(__u8 spacing)
 824 {
 825         printf("\t\tMinimum RX AMPDU time spacing: %s (0x%02x)\n",
 826                print_ampdu_space(spacing), spacing);
 827 }
 828
 829 void print_ht_capability(__u16 cap)
 830 {
 831 #define PRINT_HT_CAP(_cond, _str) \
 832         do { \
 833                 if (_cond) \
 834                         printf("\t\t\t" _str "\n"); \
 835         } while (0)
 836
 837         printf("\t\tCapabilities: 0x%02x\n", cap);
 838
 839         PRINT_HT_CAP((cap & BIT(0)), "RX LDPC");
 840         PRINT_HT_CAP((cap & BIT(1)), "HT20/HT40");
 841         PRINT_HT_CAP(!(cap & BIT(1)), "HT20");
 842
 843         PRINT_HT_CAP(((cap >> 2) & 0x3) == 0, "Static SM Power Save");
 844         PRINT_HT_CAP(((cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 845         PRINT_HT_CAP(((cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 846
 847         PRINT_HT_CAP((cap & BIT(4)), "RX Greenfield");
 848         PRINT_HT_CAP((cap & BIT(5)), "RX HT20 SGI");
 849         PRINT_HT_CAP((cap & BIT(6)), "RX HT40 SGI");
 850         PRINT_HT_CAP((cap & BIT(7)), "TX STBC");
 851
 852         PRINT_HT_CAP(((cap >> 8) & 0x3) == 0, "No RX STBC");
 853         PRINT_HT_CAP(((cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 854         PRINT_HT_CAP(((cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 855         PRINT_HT_CAP(((cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 856
 857         PRINT_HT_CAP((cap & BIT(10)), "HT Delayed Block Ack");
 858
 859         PRINT_HT_CAP(!(cap & BIT(11)), "Max AMSDU length: 3839 bytes");
 860         PRINT_HT_CAP((cap & BIT(11)), "Max AMSDU length: 7935 bytes");
 861
 862         /*
 863          * For beacons and probe response this would mean the BSS
 864          * does or does not allow the usage of DSSS/CCK HT40.
 865          * Otherwise it means the STA does or does not use
 866          * DSSS/CCK HT40.
 867          */
 868         PRINT_HT_CAP((cap & BIT(12)), "DSSS/CCK HT40");
 869         PRINT_HT_CAP(!(cap & BIT(12)), "No DSSS/CCK HT40");
 870
 871         /* BIT(13) is reserved */
 872
 873         PRINT_HT_CAP((cap & BIT(14)), "40 MHz Intolerant");
 874
 875         PRINT_HT_CAP((cap & BIT(15)), "L-SIG TXOP protection");
 876 #undef PRINT_HT_CAP
 877 }
 878
 879 void print_ht_mcs(const __u8 *mcs)
 880 {
 881         /* As defined in 7.3.2.57.4 Supported MCS Set field */
 882         unsigned int tx_max_num_spatial_streams, max_rx_supp_data_rate;
 883         bool tx_mcs_set_defined, tx_mcs_set_equal, tx_unequal_modulation;
 884
 885         max_rx_supp_data_rate = (mcs[10] | ((mcs[11] & 0x3) << 8));
 886         tx_mcs_set_defined = !!(mcs[12] & (1 << 0));
 887         tx_mcs_set_equal = !(mcs[12] & (1 << 1));
 888         tx_max_num_spatial_streams = ((mcs[12] >> 2) & 3) + 1;
 889         tx_unequal_modulation = !!(mcs[12] & (1 << 4));
 890
 891         if (max_rx_supp_data_rate)
 892                 printf("\t\tHT Max RX data rate: %d Mbps\n", max_rx_supp_data_rate);
 893         /* XXX: else see 9.6.0e.5.3 how to get this I think */
 894
 895         if (tx_mcs_set_defined) {
 896                 if (tx_mcs_set_equal) {
 897                         printf("\t\tHT TX/RX MCS rate indexes supported:");
 898                         print_mcs_index(mcs);
 899                 } else {
 900                         printf("\t\tHT RX MCS rate indexes supported:");
 901                         print_mcs_index(mcs);
 902
 903                         if (tx_unequal_modulation)
 904                                 printf("\t\tTX unequal modulation supported\n");
 905                         else
 906                                 printf("\t\tTX unequal modulation not supported\n");
 907
 908                         printf("\t\tHT TX Max spatial streams: %d\n",
 909                                 tx_max_num_spatial_streams);
 910
 911                         printf("\t\tHT TX MCS rate indexes supported may differ\n");
 912                 }
 913         } else {
 914                 printf("\t\tHT RX MCS rate indexes supported:");
 915                 print_mcs_index(mcs);
 916                 printf("\t\tHT TX MCS rate indexes are undefined\n");
 917         }
 918 }
 919
 920 void print_vht_info(__u32 capa, const __u8 *mcs)
 921 {
 922         __u16 tmp;
 923         int i;
 924
 925         printf("\t\tVHT Capabilities (0x%.8x):\n", capa);
 926
 927 #define PRINT_VHT_CAPA(_bit, _str) \
 928         do { \
 929                 if (capa & BIT(_bit)) \
 930                         printf("\t\t\t" _str "\n"); \
 931         } while (0)
 932
 933         printf("\t\t\tMax MPDU length: ");
 934         switch (capa & 3) {
 935         case 0: printf("3895\n"); break;
 936         case 1: printf("7991\n"); break;
 937         case 2: printf("11454\n"); break;
 938         case 3: printf("(reserved)\n");
 939         }
 940         printf("\t\t\tSupported Channel Width: ");
 941         switch ((capa >> 2) & 3) {
 942         case 0: printf("neither 160 nor 80+80\n"); break;
 943         case 1: printf("160 MHz\n"); break;
 944         case 2: printf("160 MHz, 80+80 MHz\n"); break;
 945         case 3: printf("(reserved)\n");
 946         }
 947         PRINT_VHT_CAPA(4, "RX LDPC");
 948         PRINT_VHT_CAPA(5, "short GI (80 MHz)");
 949         PRINT_VHT_CAPA(6, "short GI (160/80+80 MHz)");
 950         PRINT_VHT_CAPA(7, "TX STBC");
 951         /* RX STBC */
 952         PRINT_VHT_CAPA(11, "SU Beamformer");
 953         PRINT_VHT_CAPA(12, "SU Beamformee");
 954         /* compressed steering */
 955         /* # of sounding dimensions */
 956         PRINT_VHT_CAPA(19, "MU Beamformer");
 957         PRINT_VHT_CAPA(20, "MU Beamformee");
 958         PRINT_VHT_CAPA(21, "VHT TXOP PS");
 959         PRINT_VHT_CAPA(22, "+HTC-VHT");
 960         /* max A-MPDU */
 961         /* VHT link adaptation */
 962         PRINT_VHT_CAPA(28, "RX antenna pattern consistency");
 963         PRINT_VHT_CAPA(29, "TX antenna pattern consistency");
 964
 965         printf("\t\tVHT RX MCS set:\n");
 966         tmp = mcs[0] | (mcs[1] << 8);
 967         for (i = 1; i <= 8; i++) {
 968                 printf("\t\t\t%d streams: ", i);
 969                 switch ((tmp >> ((i-1)*2) ) & 3) {
 970                 case 0: printf("MCS 0-7\n"); break;
 971                 case 1: printf("MCS 0-8\n"); break;
 972                 case 2: printf("MCS 0-9\n"); break;
 973                 case 3: printf("not supported\n"); break;
 974                 }
 975         }
 976         tmp = mcs[2] | (mcs[3] << 8);
 977         printf("\t\tVHT RX highest supported: %d Mbps\n", tmp & 0x1fff);
 978
 979         printf("\t\tVHT TX MCS set:\n");
 980         tmp = mcs[4] | (mcs[5] << 8);
 981         for (i = 1; i <= 8; i++) {
 982                 printf("\t\t\t%d streams: ", i);
 983                 switch ((tmp >> ((i-1)*2) ) & 3) {
 984                 case 0: printf("MCS 0-7\n"); break;
 985                 case 1: printf("MCS 0-8\n"); break;
 986                 case 2: printf("MCS 0-9\n"); break;
 987                 case 3: printf("not supported\n"); break;
 988                 }
 989         }
 990         tmp = mcs[6] | (mcs[7] << 8);
 991         printf("\t\tVHT TX highest supported: %d Mbps\n", tmp & 0x1fff);
 992 }
 993
 994 void iw_hexdump(const char *prefix, const __u8 *buf, size_t size)
 995 {
 996         size_t i;
 997
 998         printf("%s: ", prefix);
 999         for (i = 0; i < size; i++) {
1000                 if (i && i % 16 == 0)
1001                         printf("\n%s: ", prefix);
1002                 printf("%02x ", buf[i]);
1003         }
1004         printf("\n\n");
1005 }
1006
1007 int get_cf1(const struct chanmode *chanmode, unsigned long freq)
1008 {
1009         unsigned int cf1 = freq, j;
1010         unsigned int vht80[] = { 5180, 5260, 5500, 5580, 5660, 5745 };
1011
1012         switch (chanmode->width) {
1013         case NL80211_CHAN_WIDTH_80:
1014                 /* setup center_freq1 */
1015                 for (j = 0; j < ARRAY_SIZE(vht80); j++) {
1016                         if (freq >= vht80[j] && freq < vht80[j] + 80)
1017                                 break;
1018                 }
1019
1020                 if (j == ARRAY_SIZE(vht80))
1021                         break;
1022
1023                 cf1 = vht80[j] + 30;
1024                 break;
1025         default:
1026                 cf1 = freq + chanmode->freq1_diff;
1027                 break;
1028         }
1029
1030         return cf1;
1031 }