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         [NL80211_CMD_SET_MULTICAST_TO_UNICAST] = "set_multicast_to_unicast",
 275         [NL80211_CMD_UPDATE_CONNECT_PARAMS] = "update_connect_params",
 276 };
 277
 278 static char cmdbuf[100];
 279
 280 const char *command_name(enum nl80211_commands cmd)
 281 {
 282         if (cmd <= NL80211_CMD_MAX && commands[cmd])
 283                 return commands[cmd];
 284         sprintf(cmdbuf, "Unknown command (%d)", cmd);
 285         return cmdbuf;
 286 }
 287
 288 int ieee80211_channel_to_frequency(int chan, enum nl80211_band band)
 289 {
 290         /* see 802.11 17.3.8.3.2 and Annex J
 291          * there are overlapping channel numbers in 5GHz and 2GHz bands */
 292         if (chan <= 0)
 293                 return 0; /* not supported */
 294         switch (band) {
 295         case NL80211_BAND_2GHZ:
 296                 if (chan == 14)
 297                         return 2484;
 298                 else if (chan < 14)
 299                         return 2407 + chan * 5;
 300                 break;
 301         case NL80211_BAND_5GHZ:
 302                 if (chan >= 182 && chan <= 196)
 303                         return 4000 + chan * 5;
 304                 else
 305                         return 5000 + chan * 5;
 306                 break;
 307         case NL80211_BAND_60GHZ:
 308                 if (chan < 5)
 309                         return 56160 + chan * 2160;
 310                 break;
 311         default:
 312                 ;
 313         }
 314         return 0; /* not supported */
 315 }
 316
 317 int ieee80211_frequency_to_channel(int freq)
 318 {
 319         /* see 802.11-2007 17.3.8.3.2 and Annex J */
 320         if (freq == 2484)
 321                 return 14;
 322         else if (freq < 2484)
 323                 return (freq - 2407) / 5;
 324         else if (freq >= 4910 && freq <= 4980)
 325                 return (freq - 4000) / 5;
 326         else if (freq <= 45000) /* DMG band lower limit */
 327                 return (freq - 5000) / 5;
 328         else if (freq >= 58320 && freq <= 64800)
 329                 return (freq - 56160) / 2160;
 330         else
 331                 return 0;
 332 }
 333
 334 void print_ssid_escaped(const uint8_t len, const uint8_t *data)
 335 {
 336         int i;
 337
 338         for (i = 0; i < len; i++) {
 339                 if (isprint(data[i]) && data[i] != ' ' && data[i] != '\\')
 340                         printf("%c", data[i]);
 341                 else if (data[i] == ' ' &&
 342                          (i != 0 && i != len -1))
 343                         printf(" ");
 344                 else
 345                         printf("\\x%.2x", data[i]);
 346         }
 347 }
 348
 349 static int hex2num(char digit)
 350 {
 351         if (!isxdigit(digit))
 352                 return -1;
 353         if (isdigit(digit))
 354                 return digit - '0';
 355         return tolower(digit) - 'a' + 10;
 356 }
 357
 358 static int hex2byte(const char *hex)
 359 {
 360         int d1, d2;
 361
 362         d1 = hex2num(hex[0]);
 363         if (d1 < 0)
 364                 return -1;
 365         d2 = hex2num(hex[1]);
 366         if (d2 < 0)
 367                 return -1;
 368         return (d1 << 4) | d2;
 369 }
 370
 371 static char *hex2bin(const char *hex, char *buf)
 372 {
 373         char *result = buf;
 374         int d;
 375
 376         while (hex[0]) {
 377                 d = hex2byte(hex);
 378                 if (d < 0)
 379                         return NULL;
 380                 buf[0] = d;
 381                 buf++;
 382                 hex += 2;
 383         }
 384
 385         return result;
 386 }
 387
 388 int parse_keys(struct nl_msg *msg, char **argv, int argc)
 389 {
 390         struct nlattr *keys;
 391         int i = 0;
 392         bool have_default = false;
 393         char keybuf[13];
 394
 395         if (!argc)
 396                 return 1;
 397
 398         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
 399
 400         keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
 401         if (!keys)
 402                 return -ENOBUFS;
 403
 404         do {
 405                 char *arg = *argv;
 406                 int pos = 0, keylen;
 407                 struct nlattr *key = nla_nest_start(msg, ++i);
 408                 char *keydata;
 409
 410                 if (!key)
 411                         return -ENOBUFS;
 412
 413                 if (arg[pos] == 'd') {
 414                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
 415                         pos++;
 416                         if (arg[pos] == ':')
 417                                 pos++;
 418                         have_default = true;
 419                 }
 420
 421                 if (!isdigit(arg[pos]))
 422                         goto explain;
 423                 NLA_PUT_U8(msg, NL80211_KEY_IDX, arg[pos++] - '0');
 424                 if (arg[pos++] != ':')
 425                         goto explain;
 426                 keydata = arg + pos;
 427                 switch (strlen(keydata)) {
 428                 case 10:
 429                         keydata = hex2bin(keydata, keybuf);
 430                 case 5:
 431                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER, 0x000FAC01);
 432                         keylen = 5;
 433                         break;
 434                 case 26:
 435                         keydata = hex2bin(keydata, keybuf);
 436                 case 13:
 437                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER, 0x000FAC05);
 438                         keylen = 13;
 439                         break;
 440                 default:
 441                         goto explain;
 442                 }
 443
 444                 if (!keydata)
 445                         goto explain;
 446
 447                 NLA_PUT(msg, NL80211_KEY_DATA, keylen, keydata);
 448
 449                 argv++;
 450                 argc--;
 451
 452                 /* one key should be TX key */
 453                 if (!have_default && !argc)
 454                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
 455
 456                 nla_nest_end(msg, key);
 457         } while (argc);
 458
 459         nla_nest_end(msg, keys);
 460
 461         return 0;
 462  nla_put_failure:
 463         return -ENOBUFS;
 464  explain:
 465         fprintf(stderr, "key must be [d:]index:data where\n"
 466                         "  'd:'     means default (transmit) key\n"
 467                         "  'index:' is a single digit (0-3)\n"
 468                         "  'data'   must be 5 or 13 ascii chars\n"
 469                         "           or 10 or 26 hex digits\n"
 470                         "for example: d:2:6162636465 is the same as d:2:abcde\n");
 471         return 2;
 472 }
 473
 474 enum nl80211_chan_width str_to_bw(const char *str)
 475 {
 476         static const struct {
 477                 const char *name;
 478                 unsigned int val;
 479         } bwmap[] = {
 480                 { .name = "5", .val = NL80211_CHAN_WIDTH_5, },
 481                 { .name = "10", .val = NL80211_CHAN_WIDTH_10, },
 482                 { .name = "20", .val = NL80211_CHAN_WIDTH_20, },
 483                 { .name = "40", .val = NL80211_CHAN_WIDTH_40, },
 484                 { .name = "80", .val = NL80211_CHAN_WIDTH_80, },
 485                 { .name = "80+80", .val = NL80211_CHAN_WIDTH_80P80, },
 486                 { .name = "160", .val = NL80211_CHAN_WIDTH_160, },
 487         };
 488         unsigned int i;
 489
 490         for (i = 0; i < ARRAY_SIZE(bwmap); i++) {
 491                 if (strcasecmp(bwmap[i].name, str) == 0)
 492                         return bwmap[i].val;
 493         }
 494
 495         return NL80211_CHAN_WIDTH_20_NOHT;
 496 }
 497
 498 static int parse_freqs(struct chandef *chandef, int argc, char **argv,
 499                        int *parsed)
 500 {
 501         uint32_t freq;
 502         char *end;
 503         bool need_cf1 = false, need_cf2 = false;
 504
 505         if (argc < 1)
 506                 return 0;
 507
 508         chandef->width = str_to_bw(argv[0]);
 509
 510         switch (chandef->width) {
 511         case NL80211_CHAN_WIDTH_20_NOHT:
 512                 /* First argument was not understood, give up gracefully. */
 513                 return 0;
 514         case NL80211_CHAN_WIDTH_20:
 515         case NL80211_CHAN_WIDTH_5:
 516         case NL80211_CHAN_WIDTH_10:
 517                 break;
 518         case NL80211_CHAN_WIDTH_80P80:
 519                 need_cf2 = true;
 520                 /* fall through */
 521         case NL80211_CHAN_WIDTH_40:
 522         case NL80211_CHAN_WIDTH_80:
 523         case NL80211_CHAN_WIDTH_160:
 524                 need_cf1 = true;
 525                 break;
 526         }
 527
 528         *parsed += 1;
 529
 530         if (!need_cf1)
 531                 return 0;
 532
 533         if (argc < 2)
 534                 return 1;
 535
 536         /* center freq 1 */
 537         if (!*argv[1])
 538                 return 1;
 539         freq = strtoul(argv[1], &end, 10);
 540         if (*end)
 541                 return 1;
 542         *parsed += 1;
 543
 544         chandef->center_freq1 = freq;
 545
 546         if (!need_cf2)
 547                 return 0;
 548
 549         if (argc < 3)
 550                 return 1;
 551
 552         /* center freq 2 */
 553         if (!*argv[2])
 554                 return 1;
 555         freq = strtoul(argv[2], &end, 10);
 556         if (*end)
 557                 return 1;
 558         chandef->center_freq2 = freq;
 559
 560         *parsed += 1;
 561
 562         return 0;
 563 }
 564
 565
 566 /**
 567  * parse_freqchan - Parse frequency or channel definition
 568  *
 569  * @chandef: chandef structure to be filled in
 570  * @chan: Boolean whether to parse a channel or frequency based specifier
 571  * @argc: Number of arguments
 572  * @argv: Array of string arguments
 573  * @parsed: Pointer to return the number of used arguments, or NULL to error
 574  *          out if any argument is left unused.
 575  *
 576  * The given chandef structure will be filled in from the command line
 577  * arguments. argc/argv will be updated so that further arguments from the
 578  * command line can be parsed.
 579  *
 580  * Note that despite the fact that the function knows how many center freqs
 581  * are needed, there's an ambiguity if the next argument after this is an
 582  * integer argument, since the valid channel width values are interpreted
 583  * as such, rather than a following argument. This can be avoided by the
 584  * user by giving "NOHT" instead.
 585  *
 586  * The working specifier if chan is set are:
 587  *   <channel> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
 588  *
 589  * And if frequency is set:
 590  *   <freq> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
 591  *   <control freq> [5|10|20|40|80|80+80|160] [<center1_freq> [<center2_freq>]]
 592  *
 593  * If the mode/channel width is not given the NOHT is assumed.
 594  *
 595  * Return: Number of used arguments, zero or negative error number otherwise
 596  */
 597 int parse_freqchan(struct chandef *chandef, bool chan, int argc, char **argv,
 598                    int *parsed)
 599 {
 600         char *end;
 601         static const struct chanmode chanmode[] = {
 602                 { .name = "HT20",
 603                   .width = NL80211_CHAN_WIDTH_20,
 604                   .freq1_diff = 0,
 605                   .chantype = NL80211_CHAN_HT20 },
 606                 { .name = "HT40+",
 607                   .width = NL80211_CHAN_WIDTH_40,
 608                   .freq1_diff = 10,
 609                   .chantype = NL80211_CHAN_HT40PLUS },
 610                 { .name = "HT40-",
 611                   .width = NL80211_CHAN_WIDTH_40,
 612                   .freq1_diff = -10,
 613                   .chantype = NL80211_CHAN_HT40MINUS },
 614                 { .name = "NOHT",
 615                   .width = NL80211_CHAN_WIDTH_20_NOHT,
 616                   .freq1_diff = 0,
 617                   .chantype = NL80211_CHAN_NO_HT },
 618                 { .name = "5MHz",
 619                   .width = NL80211_CHAN_WIDTH_5,
 620                   .freq1_diff = 0,
 621                   .chantype = -1 },
 622                 { .name = "10MHz",
 623                   .width = NL80211_CHAN_WIDTH_10,
 624                   .freq1_diff = 0,
 625                   .chantype = -1 },
 626                 { .name = "80MHz",
 627                   .width = NL80211_CHAN_WIDTH_80,
 628                   .freq1_diff = 0,
 629                   .chantype = -1 },
 630         };
 631         const struct chanmode *chanmode_selected = NULL;
 632         unsigned int freq;
 633         unsigned int i;
 634         int _parsed = 0;
 635         int res = 0;
 636
 637         if (argc < 1)
 638                 return 1;
 639
 640         if (!argv[0])
 641                 goto out;
 642         freq = strtoul(argv[0], &end, 10);
 643         if (*end) {
 644                 res = 1;
 645                 goto out;
 646         }
 647
 648         _parsed += 1;
 649
 650         memset(chandef, 0, sizeof(struct chandef));
 651
 652         if (chan) {
 653                 enum nl80211_band band;
 654
 655                 band = freq <= 14 ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 656                 freq = ieee80211_channel_to_frequency(freq, band);
 657         }
 658         chandef->control_freq = freq;
 659         /* Assume 20MHz NOHT channel for now. */
 660         chandef->center_freq1 = freq;
 661
 662         /* Try to parse HT mode definitions */
 663         if (argc > 1) {
 664                 for (i = 0; i < ARRAY_SIZE(chanmode); i++) {
 665                         if (strcasecmp(chanmode[i].name, argv[1]) == 0) {
 666                                 chanmode_selected = &chanmode[i];
 667                                 _parsed += 1;
 668                                 break;
 669                         }
 670                 }
 671         }
 672
 673         /* channel mode given, use it and return. */
 674         if (chanmode_selected) {
 675                 chandef->center_freq1 = get_cf1(chanmode_selected, freq);
 676                 chandef->width = chanmode_selected->width;
 677                 goto out;
 678         }
 679
 680         /* This was a only a channel definition, nothing further may follow. */
 681         if (chan)
 682                 goto out;
 683
 684         res = parse_freqs(chandef, argc - 1, argv + 1, &_parsed);
 685
 686  out:
 687         /* Error out if parsed is NULL. */
 688         if (!parsed && _parsed != argc)
 689                 return 1;
 690
 691         if (parsed)
 692                 *parsed = _parsed;
 693
 694         return res;
 695 }
 696
 697 int put_chandef(struct nl_msg *msg, struct chandef *chandef)
 698 {
 699         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chandef->control_freq);
 700         NLA_PUT_U32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width);
 701
 702         switch (chandef->width) {
 703         case NL80211_CHAN_WIDTH_20_NOHT:
 704                 NLA_PUT_U32(msg,
 705                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 706                             NL80211_CHAN_NO_HT);
 707                 break;
 708         case NL80211_CHAN_WIDTH_20:
 709                 NLA_PUT_U32(msg,
 710                             NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 711                             NL80211_CHAN_HT20);
 712                 break;
 713         case NL80211_CHAN_WIDTH_40:
 714                 if (chandef->control_freq > chandef->center_freq1)
 715                         NLA_PUT_U32(msg,
 716                                     NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 717                                     NL80211_CHAN_HT40MINUS);
 718                 else
 719                         NLA_PUT_U32(msg,
 720                                     NL80211_ATTR_WIPHY_CHANNEL_TYPE,
 721                                     NL80211_CHAN_HT40PLUS);
 722                 break;
 723         default:
 724                 break;
 725         }
 726
 727         if (chandef->center_freq1)
 728                 NLA_PUT_U32(msg,
 729                             NL80211_ATTR_CENTER_FREQ1,
 730                             chandef->center_freq1);
 731
 732         if (chandef->center_freq2)
 733                 NLA_PUT_U32(msg,
 734                             NL80211_ATTR_CENTER_FREQ2,
 735                             chandef->center_freq2);
 736
 737         return 0;
 738
 739  nla_put_failure:
 740         return -ENOBUFS;
 741 }
 742
 743 static void print_mcs_index(const __u8 *mcs)
 744 {
 745         int mcs_bit, prev_bit = -2, prev_cont = 0;
 746
 747         for (mcs_bit = 0; mcs_bit <= 76; mcs_bit++) {
 748                 unsigned int mcs_octet = mcs_bit/8;
 749                 unsigned int MCS_RATE_BIT = 1 << mcs_bit % 8;
 750                 bool mcs_rate_idx_set;
 751
 752                 mcs_rate_idx_set = !!(mcs[mcs_octet] & MCS_RATE_BIT);
 753
 754                 if (!mcs_rate_idx_set)
 755                         continue;
 756
 757                 if (prev_bit != mcs_bit - 1) {
 758                         if (prev_bit != -2)
 759                                 printf("%d, ", prev_bit);
 760                         else
 761                                 printf(" ");
 762                         printf("%d", mcs_bit);
 763                         prev_cont = 0;
 764                 } else if (!prev_cont) {
 765                         printf("-");
 766                         prev_cont = 1;
 767                 }
 768
 769                 prev_bit = mcs_bit;
 770         }
 771
 772         if (prev_cont)
 773                 printf("%d", prev_bit);
 774         printf("\n");
 775 }
 776
 777 /*
 778  * There are only 4 possible values, we just use a case instead of computing it,
 779  * but technically this can also be computed through the formula:
 780  *
 781  * Max AMPDU length = (2 ^ (13 + exponent)) - 1 bytes
 782  */
 783 static __u32 compute_ampdu_length(__u8 exponent)
 784 {
 785         switch (exponent) {
 786         case 0: return 8191;  /* (2 ^(13 + 0)) -1 */
 787         case 1: return 16383; /* (2 ^(13 + 1)) -1 */
 788         case 2: return 32767; /* (2 ^(13 + 2)) -1 */
 789         case 3: return 65535; /* (2 ^(13 + 3)) -1 */
 790         default: return 0;
 791         }
 792 }
 793
 794 static const char *print_ampdu_space(__u8 space)
 795 {
 796         switch (space) {
 797         case 0: return "No restriction";
 798         case 1: return "1/4 usec";
 799         case 2: return "1/2 usec";
 800         case 3: return "1 usec";
 801         case 4: return "2 usec";
 802         case 5: return "4 usec";
 803         case 6: return "8 usec";
 804         case 7: return "16 usec";
 805         default:
 806                 return "BUG (spacing more than 3 bits!)";
 807         }
 808 }
 809
 810 void print_ampdu_length(__u8 exponent)
 811 {
 812         __u32 max_ampdu_length;
 813
 814         max_ampdu_length = compute_ampdu_length(exponent);
 815
 816         if (max_ampdu_length) {
 817                 printf("\t\tMaximum RX AMPDU length %d bytes (exponent: 0x0%02x)\n",
 818                        max_ampdu_length, exponent);
 819         } else {
 820                 printf("\t\tMaximum RX AMPDU length: unrecognized bytes "
 821                        "(exponent: %d)\n", exponent);
 822         }
 823 }
 824
 825 void print_ampdu_spacing(__u8 spacing)
 826 {
 827         printf("\t\tMinimum RX AMPDU time spacing: %s (0x%02x)\n",
 828                print_ampdu_space(spacing), spacing);
 829 }
 830
 831 void print_ht_capability(__u16 cap)
 832 {
 833 #define PRINT_HT_CAP(_cond, _str) \
 834         do { \
 835                 if (_cond) \
 836                         printf("\t\t\t" _str "\n"); \
 837         } while (0)
 838
 839         printf("\t\tCapabilities: 0x%02x\n", cap);
 840
 841         PRINT_HT_CAP((cap & BIT(0)), "RX LDPC");
 842         PRINT_HT_CAP((cap & BIT(1)), "HT20/HT40");
 843         PRINT_HT_CAP(!(cap & BIT(1)), "HT20");
 844
 845         PRINT_HT_CAP(((cap >> 2) & 0x3) == 0, "Static SM Power Save");
 846         PRINT_HT_CAP(((cap >> 2) & 0x3) == 1, "Dynamic SM Power Save");
 847         PRINT_HT_CAP(((cap >> 2) & 0x3) == 3, "SM Power Save disabled");
 848
 849         PRINT_HT_CAP((cap & BIT(4)), "RX Greenfield");
 850         PRINT_HT_CAP((cap & BIT(5)), "RX HT20 SGI");
 851         PRINT_HT_CAP((cap & BIT(6)), "RX HT40 SGI");
 852         PRINT_HT_CAP((cap & BIT(7)), "TX STBC");
 853
 854         PRINT_HT_CAP(((cap >> 8) & 0x3) == 0, "No RX STBC");
 855         PRINT_HT_CAP(((cap >> 8) & 0x3) == 1, "RX STBC 1-stream");
 856         PRINT_HT_CAP(((cap >> 8) & 0x3) == 2, "RX STBC 2-streams");
 857         PRINT_HT_CAP(((cap >> 8) & 0x3) == 3, "RX STBC 3-streams");
 858
 859         PRINT_HT_CAP((cap & BIT(10)), "HT Delayed Block Ack");
 860
 861         PRINT_HT_CAP(!(cap & BIT(11)), "Max AMSDU length: 3839 bytes");
 862         PRINT_HT_CAP((cap & BIT(11)), "Max AMSDU length: 7935 bytes");
 863
 864         /*
 865          * For beacons and probe response this would mean the BSS
 866          * does or does not allow the usage of DSSS/CCK HT40.
 867          * Otherwise it means the STA does or does not use
 868          * DSSS/CCK HT40.
 869          */
 870         PRINT_HT_CAP((cap & BIT(12)), "DSSS/CCK HT40");
 871         PRINT_HT_CAP(!(cap & BIT(12)), "No DSSS/CCK HT40");
 872
 873         /* BIT(13) is reserved */
 874
 875         PRINT_HT_CAP((cap & BIT(14)), "40 MHz Intolerant");
 876
 877         PRINT_HT_CAP((cap & BIT(15)), "L-SIG TXOP protection");
 878 #undef PRINT_HT_CAP
 879 }
 880
 881 void print_ht_mcs(const __u8 *mcs)
 882 {
 883         /* As defined in 7.3.2.57.4 Supported MCS Set field */
 884         unsigned int tx_max_num_spatial_streams, max_rx_supp_data_rate;
 885         bool tx_mcs_set_defined, tx_mcs_set_equal, tx_unequal_modulation;
 886
 887         max_rx_supp_data_rate = (mcs[10] | ((mcs[11] & 0x3) << 8));
 888         tx_mcs_set_defined = !!(mcs[12] & (1 << 0));
 889         tx_mcs_set_equal = !(mcs[12] & (1 << 1));
 890         tx_max_num_spatial_streams = ((mcs[12] >> 2) & 3) + 1;
 891         tx_unequal_modulation = !!(mcs[12] & (1 << 4));
 892
 893         if (max_rx_supp_data_rate)
 894                 printf("\t\tHT Max RX data rate: %d Mbps\n", max_rx_supp_data_rate);
 895         /* XXX: else see 9.6.0e.5.3 how to get this I think */
 896
 897         if (tx_mcs_set_defined) {
 898                 if (tx_mcs_set_equal) {
 899                         printf("\t\tHT TX/RX MCS rate indexes supported:");
 900                         print_mcs_index(mcs);
 901                 } else {
 902                         printf("\t\tHT RX MCS rate indexes supported:");
 903                         print_mcs_index(mcs);
 904
 905                         if (tx_unequal_modulation)
 906                                 printf("\t\tTX unequal modulation supported\n");
 907                         else
 908                                 printf("\t\tTX unequal modulation not supported\n");
 909
 910                         printf("\t\tHT TX Max spatial streams: %d\n",
 911                                 tx_max_num_spatial_streams);
 912
 913                         printf("\t\tHT TX MCS rate indexes supported may differ\n");
 914                 }
 915         } else {
 916                 printf("\t\tHT RX MCS rate indexes supported:");
 917                 print_mcs_index(mcs);
 918                 printf("\t\tHT TX MCS rate indexes are undefined\n");
 919         }
 920 }
 921
 922 void print_vht_info(__u32 capa, const __u8 *mcs)
 923 {
 924         __u16 tmp;
 925         int i;
 926
 927         printf("\t\tVHT Capabilities (0x%.8x):\n", capa);
 928
 929 #define PRINT_VHT_CAPA(_bit, _str) \
 930         do { \
 931                 if (capa & BIT(_bit)) \
 932                         printf("\t\t\t" _str "\n"); \
 933         } while (0)
 934
 935         printf("\t\t\tMax MPDU length: ");
 936         switch (capa & 3) {
 937         case 0: printf("3895\n"); break;
 938         case 1: printf("7991\n"); break;
 939         case 2: printf("11454\n"); break;
 940         case 3: printf("(reserved)\n");
 941         }
 942         printf("\t\t\tSupported Channel Width: ");
 943         switch ((capa >> 2) & 3) {
 944         case 0: printf("neither 160 nor 80+80\n"); break;
 945         case 1: printf("160 MHz\n"); break;
 946         case 2: printf("160 MHz, 80+80 MHz\n"); break;
 947         case 3: printf("(reserved)\n");
 948         }
 949         PRINT_VHT_CAPA(4, "RX LDPC");
 950         PRINT_VHT_CAPA(5, "short GI (80 MHz)");
 951         PRINT_VHT_CAPA(6, "short GI (160/80+80 MHz)");
 952         PRINT_VHT_CAPA(7, "TX STBC");
 953         /* RX STBC */
 954         PRINT_VHT_CAPA(11, "SU Beamformer");
 955         PRINT_VHT_CAPA(12, "SU Beamformee");
 956         /* compressed steering */
 957         /* # of sounding dimensions */
 958         PRINT_VHT_CAPA(19, "MU Beamformer");
 959         PRINT_VHT_CAPA(20, "MU Beamformee");
 960         PRINT_VHT_CAPA(21, "VHT TXOP PS");
 961         PRINT_VHT_CAPA(22, "+HTC-VHT");
 962         /* max A-MPDU */
 963         /* VHT link adaptation */
 964         PRINT_VHT_CAPA(28, "RX antenna pattern consistency");
 965         PRINT_VHT_CAPA(29, "TX antenna pattern consistency");
 966
 967         printf("\t\tVHT RX MCS set:\n");
 968         tmp = mcs[0] | (mcs[1] << 8);
 969         for (i = 1; i <= 8; i++) {
 970                 printf("\t\t\t%d streams: ", i);
 971                 switch ((tmp >> ((i-1)*2) ) & 3) {
 972                 case 0: printf("MCS 0-7\n"); break;
 973                 case 1: printf("MCS 0-8\n"); break;
 974                 case 2: printf("MCS 0-9\n"); break;
 975                 case 3: printf("not supported\n"); break;
 976                 }
 977         }
 978         tmp = mcs[2] | (mcs[3] << 8);
 979         printf("\t\tVHT RX highest supported: %d Mbps\n", tmp & 0x1fff);
 980
 981         printf("\t\tVHT TX MCS set:\n");
 982         tmp = mcs[4] | (mcs[5] << 8);
 983         for (i = 1; i <= 8; i++) {
 984                 printf("\t\t\t%d streams: ", i);
 985                 switch ((tmp >> ((i-1)*2) ) & 3) {
 986                 case 0: printf("MCS 0-7\n"); break;
 987                 case 1: printf("MCS 0-8\n"); break;
 988                 case 2: printf("MCS 0-9\n"); break;
 989                 case 3: printf("not supported\n"); break;
 990                 }
 991         }
 992         tmp = mcs[6] | (mcs[7] << 8);
 993         printf("\t\tVHT TX highest supported: %d Mbps\n", tmp & 0x1fff);
 994 }
 995
 996 void iw_hexdump(const char *prefix, const __u8 *buf, size_t size)
 997 {
 998         size_t i;
 999
1000         printf("%s: ", prefix);
1001         for (i = 0; i < size; i++) {
1002                 if (i && i % 16 == 0)
1003                         printf("\n%s: ", prefix);
1004                 printf("%02x ", buf[i]);
1005         }
1006         printf("\n\n");
1007 }
1008
1009 int get_cf1(const struct chanmode *chanmode, unsigned long freq)
1010 {
1011         unsigned int cf1 = freq, j;
1012         unsigned int vht80[] = { 5180, 5260, 5500, 5580, 5660, 5745 };
1013
1014         switch (chanmode->width) {
1015         case NL80211_CHAN_WIDTH_80:
1016                 /* setup center_freq1 */
1017                 for (j = 0; j < ARRAY_SIZE(vht80); j++) {
1018                         if (freq >= vht80[j] && freq < vht80[j] + 80)
1019                                 break;
1020                 }
1021
1022                 if (j == ARRAY_SIZE(vht80))
1023                         break;
1024
1025                 cf1 = vht80[j] + 30;
1026                 break;
1027         default:
1028                 cf1 = freq + chanmode->freq1_diff;
1029                 break;
1030         }
1031
1032         return cf1;
1033 }