event.c

   1 #include <stdint.h>
   2 #include <stdbool.h>
   3 #include <net/if.h>
   4 #include <errno.h>
   5 #include "iw.h"
   6
   7 static int no_seq_check(struct nl_msg *msg, void *arg)
   8 {
   9         return NL_OK;
  10 }
  11
  12 struct ieee80211_beacon_channel {
  13         __u16 center_freq;
  14         bool no_ir;
  15         bool no_ibss;
  16 };
  17
  18 static int parse_beacon_hint_chan(struct nlattr *tb,
  19                                   struct ieee80211_beacon_channel *chan)
  20 {
  21         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
  22         static struct nla_policy beacon_freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
  23                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
  24                 [NL80211_FREQUENCY_ATTR_NO_IR] = { .type = NLA_FLAG },
  25                 [__NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
  26         };
  27
  28         if (nla_parse_nested(tb_freq,
  29                              NL80211_FREQUENCY_ATTR_MAX,
  30                              tb,
  31                              beacon_freq_policy))
  32                 return -EINVAL;
  33
  34         chan->center_freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
  35
  36         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IR])
  37                 chan->no_ir = true;
  38         if (tb_freq[__NL80211_FREQUENCY_ATTR_NO_IBSS])
  39                 chan->no_ibss = true;
  40
  41         return 0;
  42 }
  43
  44 static void print_frame(struct print_event_args *args, struct nlattr *attr)
  45 {
  46         uint8_t *frame;
  47         size_t len;
  48         int i;
  49         char macbuf[6*3];
  50         uint16_t tmp;
  51
  52         if (!attr)
  53                 printf(" [no frame]");
  54
  55         frame = nla_data(attr);
  56         len = nla_len(attr);
  57
  58         if (len < 26) {
  59                 printf(" [invalid frame: ");
  60                 goto print_frame;
  61         }
  62
  63         mac_addr_n2a(macbuf, frame + 10);
  64         printf(" %s -> ", macbuf);
  65         mac_addr_n2a(macbuf, frame + 4);
  66         printf("%s", macbuf);
  67
  68         switch (frame[0] & 0xfc) {
  69         case 0x10: /* assoc resp */
  70         case 0x30: /* reassoc resp */
  71                 /* status */
  72                 tmp = (frame[27] << 8) + frame[26];
  73                 printf(" status: %d: %s", tmp, get_status_str(tmp));
  74                 break;
  75         case 0x00: /* assoc req */
  76         case 0x20: /* reassoc req */
  77                 break;
  78         case 0xb0: /* auth */
  79                 /* status */
  80                 tmp = (frame[29] << 8) + frame[28];
  81                 printf(" status: %d: %s", tmp, get_status_str(tmp));
  82                 break;
  83                 break;
  84         case 0xa0: /* disassoc */
  85         case 0xc0: /* deauth */
  86                 /* reason */
  87                 tmp = (frame[25] << 8) + frame[24];
  88                 printf(" reason %d: %s", tmp, get_reason_str(tmp));
  89                 break;
  90         }
  91
  92         if (!args->frame)
  93                 return;
  94
  95         printf(" [frame:");
  96
  97  print_frame:
  98         for (i = 0; i < len; i++)
  99                 printf(" %.02x", frame[i]);
 100         printf("]");
 101 }
 102
 103 static void parse_cqm_event(struct nlattr **attrs)
 104 {
 105         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
 106                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
 107                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
 108                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
 109         };
 110         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
 111         struct nlattr *cqm_attr = attrs[NL80211_ATTR_CQM];
 112
 113         printf("CQM event: ");
 114
 115         if (!cqm_attr ||
 116             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, cqm_attr, cqm_policy)) {
 117                 printf("missing data!\n");
 118                 return;
 119         }
 120
 121         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]) {
 122                 enum nl80211_cqm_rssi_threshold_event rssi_event;
 123                 bool found_one = false;
 124
 125                 rssi_event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
 126
 127                 switch (rssi_event) {
 128                 case NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH:
 129                         printf("RSSI went above threshold\n");
 130                         found_one = true;
 131                         break;
 132                 case NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW:
 133                         printf("RSSI went below threshold\n");
 134                         found_one = true;
 135                         break;
 136                 case NL80211_CQM_RSSI_BEACON_LOSS_EVENT:
 137                         printf("Beacon loss detected\n");
 138                         found_one = true;
 139                         break;
 140                 }
 141
 142                 if (!found_one)
 143                         printf("Unknown event type: %i\n", rssi_event);
 144         } else if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT] &&
 145                    attrs[NL80211_ATTR_MAC]) {
 146                 uint32_t frames;
 147                 char buf[3*6];
 148
 149                 frames = nla_get_u32(cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]);
 150                 mac_addr_n2a(buf, nla_data(attrs[NL80211_ATTR_MAC]));
 151                 printf("peer %s didn't ACK %d packets\n", buf, frames);
 152         } else
 153                 printf("unknown event\n");
 154 }
 155
 156 static const char * key_type_str(enum nl80211_key_type key_type)
 157 {
 158         static char buf[30];
 159         switch (key_type) {
 160         case NL80211_KEYTYPE_GROUP:
 161                 return "Group";
 162         case NL80211_KEYTYPE_PAIRWISE:
 163                 return "Pairwise";
 164         case NL80211_KEYTYPE_PEERKEY:
 165                 return "PeerKey";
 166         default:
 167                 snprintf(buf, sizeof(buf), "unknown(%d)", key_type);
 168                 return buf;
 169         }
 170 }
 171
 172 static void parse_mic_failure(struct nlattr **attrs)
 173 {
 174         printf("Michael MIC failure event:");
 175
 176         if (attrs[NL80211_ATTR_MAC]) {
 177                 char addr[3 * ETH_ALEN];
 178                 mac_addr_n2a(addr, nla_data(attrs[NL80211_ATTR_MAC]));
 179                 printf(" source MAC address %s", addr);
 180         }
 181
 182         if (attrs[NL80211_ATTR_KEY_SEQ] &&
 183             nla_len(attrs[NL80211_ATTR_KEY_SEQ]) == 6) {
 184                 unsigned char *seq = nla_data(attrs[NL80211_ATTR_KEY_SEQ]);
 185                 printf(" seq=%02x%02x%02x%02x%02x%02x",
 186                        seq[0], seq[1], seq[2], seq[3], seq[4], seq[5]);
 187         }
 188         if (attrs[NL80211_ATTR_KEY_TYPE]) {
 189                 enum nl80211_key_type key_type =
 190                         nla_get_u32(attrs[NL80211_ATTR_KEY_TYPE]);
 191                 printf(" Key Type %s", key_type_str(key_type));
 192         }
 193
 194         if (attrs[NL80211_ATTR_KEY_IDX]) {
 195                 __u8 key_id = nla_get_u8(attrs[NL80211_ATTR_KEY_IDX]);
 196                 printf(" Key Id %d", key_id);
 197         }
 198
 199         printf("\n");
 200 }
 201
 202 static void parse_wowlan_wake_event(struct nlattr **attrs)
 203 {
 204         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
 205
 206         printf("WoWLAN wakeup\n");
 207         if (!attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
 208                 printf("\twakeup not due to WoWLAN\n");
 209                 return;
 210         }
 211
 212         nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
 213                   nla_data(attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
 214                   nla_len(attrs[NL80211_ATTR_WOWLAN_TRIGGERS]), NULL);
 215
 216         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT])
 217                 printf("\t* was disconnected\n");
 218         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT])
 219                 printf("\t* magic packet received\n");
 220         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN])
 221                 printf("\t* pattern index: %u\n",
 222                        nla_get_u32(tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]));
 223         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE])
 224                 printf("\t* GTK rekey failure\n");
 225         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST])
 226                 printf("\t* EAP identity request\n");
 227         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE])
 228                 printf("\t* 4-way handshake\n");
 229         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE])
 230                 printf("\t* RF-kill released\n");
 231         if (tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]) {
 232                 uint8_t *d = nla_data(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]);
 233                 int l = nla_len(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211]);
 234                 int i;
 235                 printf("\t* packet (might be truncated): ");
 236                 for (i = 0; i < l; i++) {
 237                         if (i > 0)
 238                                 printf(":");
 239                         printf("%.2x", d[i]);
 240                 }
 241                 printf("\n");
 242         }
 243         if (tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]) {
 244                 uint8_t *d = nla_data(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]);
 245                 int l = nla_len(tb[NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023]);
 246                 int i;
 247                 printf("\t* packet (might be truncated): ");
 248                 for (i = 0; i < l; i++) {
 249                         if (i > 0)
 250                                 printf(":");
 251                         printf("%.2x", d[i]);
 252                 }
 253                 printf("\n");
 254         }
 255         if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH])
 256                 printf("\t* TCP connection wakeup received\n");
 257         if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST])
 258                 printf("\t* TCP connection lost\n");
 259         if (tb[NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS])
 260                 printf("\t* TCP connection ran out of tokens\n");
 261 }
 262
 263 static int print_event(struct nl_msg *msg, void *arg)
 264 {
 265         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 266         struct nlattr *tb[NL80211_ATTR_MAX + 1], *nst;
 267         struct print_event_args *args = arg;
 268         char ifname[100];
 269         char macbuf[6*3];
 270         __u8 reg_type;
 271         struct ieee80211_beacon_channel chan_before_beacon,  chan_after_beacon;
 272         __u32 wiphy_idx = 0;
 273         int rem_nst;
 274         __u16 status;
 275
 276         if (args->time || args->reltime) {
 277                 unsigned long long usecs, previous;
 278
 279                 previous = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
 280                 gettimeofday(&args->ts, NULL);
 281                 usecs = 1000000ULL * args->ts.tv_sec + args->ts.tv_usec;
 282                 if (args->reltime) {
 283                         if (!args->have_ts) {
 284                                 usecs = 0;
 285                                 args->have_ts = true;
 286                         } else
 287                                 usecs -= previous;
 288                 }
 289                 printf("%llu.%06llu: ", usecs/1000000, usecs % 1000000);
 290         }
 291
 292         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 293                   genlmsg_attrlen(gnlh, 0), NULL);
 294
 295         if (tb[NL80211_ATTR_IFINDEX] && tb[NL80211_ATTR_WIPHY]) {
 296                 if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
 297                 printf("%s (phy #%d): ", ifname, nla_get_u32(tb[NL80211_ATTR_WIPHY]));
 298         } else if (tb[NL80211_ATTR_WDEV] && tb[NL80211_ATTR_WIPHY]) {
 299                 printf("wdev 0x%llx (phy #%d): ",
 300                         (unsigned long long)nla_get_u64(tb[NL80211_ATTR_WDEV]),
 301                         nla_get_u32(tb[NL80211_ATTR_WIPHY]));
 302         } else if (tb[NL80211_ATTR_IFINDEX]) {
 303                 if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), ifname);
 304                 printf("%s: ", ifname);
 305         } else if (tb[NL80211_ATTR_WDEV]) {
 306                 printf("wdev 0x%llx: ", (unsigned long long)nla_get_u64(tb[NL80211_ATTR_WDEV]));
 307         } else if (tb[NL80211_ATTR_WIPHY]) {
 308                 printf("phy #%d: ", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
 309         }
 310
 311         switch (gnlh->cmd) {
 312         case NL80211_CMD_NEW_WIPHY:
 313                 printf("renamed to %s\n", nla_get_string(tb[NL80211_ATTR_WIPHY_NAME]));
 314                 break;
 315         case NL80211_CMD_TRIGGER_SCAN:
 316                 printf("scan started\n");
 317                 break;
 318         case NL80211_CMD_NEW_SCAN_RESULTS:
 319                 printf("scan finished:");
 320         case NL80211_CMD_SCAN_ABORTED:
 321                 if (gnlh->cmd == NL80211_CMD_SCAN_ABORTED)
 322                         printf("scan aborted:");
 323                 if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 324                         nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem_nst)
 325                                 printf(" %d", nla_get_u32(nst));
 326                         printf(",");
 327                 }
 328                 if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 329                         nla_for_each_nested(nst, tb[NL80211_ATTR_SCAN_SSIDS], rem_nst) {
 330                                 printf(" \"");
 331                                 print_ssid_escaped(nla_len(nst), nla_data(nst));
 332                                 printf("\"");
 333                         }
 334                 }
 335                 printf("\n");
 336                 break;
 337         case NL80211_CMD_REG_CHANGE:
 338                 printf("regulatory domain change: ");
 339
 340                 reg_type = nla_get_u8(tb[NL80211_ATTR_REG_TYPE]);
 341
 342                 switch (reg_type) {
 343                 case NL80211_REGDOM_TYPE_COUNTRY:
 344                         printf("set to %s by %s request",
 345                                nla_get_string(tb[NL80211_ATTR_REG_ALPHA2]),
 346                                reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
 347                         if (tb[NL80211_ATTR_WIPHY])
 348                                 printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
 349                         break;
 350                 case NL80211_REGDOM_TYPE_WORLD:
 351                         printf("set to world roaming by %s request",
 352                                reg_initiator_to_string(nla_get_u8(tb[NL80211_ATTR_REG_INITIATOR])));
 353                         break;
 354                 case NL80211_REGDOM_TYPE_CUSTOM_WORLD:
 355                         printf("custom world roaming rules in place on phy%d by %s request",
 356                                nla_get_u32(tb[NL80211_ATTR_WIPHY]),
 357                                reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
 358                         break;
 359                 case NL80211_REGDOM_TYPE_INTERSECTION:
 360                         printf("intersection used due to a request made by %s",
 361                                reg_initiator_to_string(nla_get_u32(tb[NL80211_ATTR_REG_INITIATOR])));
 362                         if (tb[NL80211_ATTR_WIPHY])
 363                                 printf(" on phy%d", nla_get_u32(tb[NL80211_ATTR_WIPHY]));
 364                         break;
 365                 default:
 366                         printf("unknown source (upgrade this utility)");
 367                         break;
 368                 }
 369
 370                 printf("\n");
 371                 break;
 372         case NL80211_CMD_REG_BEACON_HINT:
 373
 374                 wiphy_idx = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
 375
 376                 memset(&chan_before_beacon, 0, sizeof(chan_before_beacon));
 377                 memset(&chan_after_beacon, 0, sizeof(chan_after_beacon));
 378
 379                 if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_BEFORE],
 380                                            &chan_before_beacon))
 381                         break;
 382                 if (parse_beacon_hint_chan(tb[NL80211_ATTR_FREQ_AFTER],
 383                                            &chan_after_beacon))
 384                         break;
 385
 386                 if (chan_before_beacon.center_freq != chan_after_beacon.center_freq)
 387                         break;
 388
 389                 /* A beacon hint is sent _only_ if something _did_ change */
 390                 printf("beacon hint:\n");
 391
 392                 printf("phy%d %d MHz [%d]:\n",
 393                        wiphy_idx,
 394                        chan_before_beacon.center_freq,
 395                        ieee80211_frequency_to_channel(chan_before_beacon.center_freq));
 396
 397                 if (chan_before_beacon.no_ir && !chan_after_beacon.no_ir) {
 398                         if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss)
 399                                 printf("\to Initiating radiation enabled\n");
 400                         else
 401                                 printf("\to active scan enabled\n");
 402                 } else if (chan_before_beacon.no_ibss && !chan_after_beacon.no_ibss) {
 403                         printf("\to ibss enabled\n");
 404                 }
 405
 406                 break;
 407         case NL80211_CMD_NEW_STATION:
 408                 mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 409                 printf("new station %s\n", macbuf);
 410                 break;
 411         case NL80211_CMD_DEL_STATION:
 412                 mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 413                 printf("del station %s\n", macbuf);
 414                 break;
 415         case NL80211_CMD_JOIN_IBSS:
 416                 mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 417                 printf("IBSS %s joined\n", macbuf);
 418                 break;
 419         case NL80211_CMD_AUTHENTICATE:
 420                 printf("auth");
 421                 if (tb[NL80211_ATTR_FRAME])
 422                         print_frame(args, tb[NL80211_ATTR_FRAME]);
 423                 else if (tb[NL80211_ATTR_TIMED_OUT])
 424                         printf(": timed out");
 425                 else
 426                         printf(": unknown event");
 427                 printf("\n");
 428                 break;
 429         case NL80211_CMD_ASSOCIATE:
 430                 printf("assoc");
 431                 if (tb[NL80211_ATTR_FRAME])
 432                         print_frame(args, tb[NL80211_ATTR_FRAME]);
 433                 else if (tb[NL80211_ATTR_TIMED_OUT])
 434                         printf(": timed out");
 435                 else
 436                         printf(": unknown event");
 437                 printf("\n");
 438                 break;
 439         case NL80211_CMD_DEAUTHENTICATE:
 440                 printf("deauth");
 441                 print_frame(args, tb[NL80211_ATTR_FRAME]);
 442                 printf("\n");
 443                 break;
 444         case NL80211_CMD_DISASSOCIATE:
 445                 printf("disassoc");
 446                 print_frame(args, tb[NL80211_ATTR_FRAME]);
 447                 printf("\n");
 448                 break;
 449         case NL80211_CMD_UNPROT_DEAUTHENTICATE:
 450                 printf("unprotected deauth");
 451                 print_frame(args, tb[NL80211_ATTR_FRAME]);
 452                 printf("\n");
 453                 break;
 454         case NL80211_CMD_UNPROT_DISASSOCIATE:
 455                 printf("unprotected disassoc");
 456                 print_frame(args, tb[NL80211_ATTR_FRAME]);
 457                 printf("\n");
 458                 break;
 459         case NL80211_CMD_CONNECT:
 460                 status = 0;
 461                 if (!tb[NL80211_ATTR_STATUS_CODE])
 462                         printf("unknown connect status");
 463                 else if (nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]) == 0)
 464                         printf("connected");
 465                 else {
 466                         status = nla_get_u16(tb[NL80211_ATTR_STATUS_CODE]);
 467                         printf("failed to connect");
 468                 }
 469                 if (tb[NL80211_ATTR_MAC]) {
 470                         mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 471                         printf(" to %s", macbuf);
 472                 }
 473                 if (status)
 474                         printf(", status: %d: %s", status, get_status_str(status));
 475                 printf("\n");
 476                 break;
 477         case NL80211_CMD_ROAM:
 478                 printf("roamed");
 479                 if (tb[NL80211_ATTR_MAC]) {
 480                         mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 481                         printf(" to %s", macbuf);
 482                 }
 483                 printf("\n");
 484                 break;
 485         case NL80211_CMD_DISCONNECT:
 486                 printf("disconnected");
 487                 if (tb[NL80211_ATTR_DISCONNECTED_BY_AP])
 488                         printf(" (by AP)");
 489                 else
 490                         printf(" (local request)");
 491                 if (tb[NL80211_ATTR_REASON_CODE])
 492                         printf(" reason: %d: %s", nla_get_u16(tb[NL80211_ATTR_REASON_CODE]),
 493                                 get_reason_str(nla_get_u16(tb[NL80211_ATTR_REASON_CODE])));
 494                 printf("\n");
 495                 break;
 496         case NL80211_CMD_REMAIN_ON_CHANNEL:
 497                 printf("remain on freq %d (%dms, cookie %llx)\n",
 498                         nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
 499                         nla_get_u32(tb[NL80211_ATTR_DURATION]),
 500                         (unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
 501                 break;
 502         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
 503                 printf("done with remain on freq %d (cookie %llx)\n",
 504                         nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]),
 505                         (unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]));
 506                 break;
 507         case NL80211_CMD_NOTIFY_CQM:
 508                 parse_cqm_event(tb);
 509                 break;
 510         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 511                 parse_mic_failure(tb);
 512                 break;
 513         case NL80211_CMD_FRAME_TX_STATUS:
 514                 printf("mgmt TX status (cookie %llx): %s\n",
 515                         (unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]),
 516                         tb[NL80211_ATTR_ACK] ? "acked" : "no ack");
 517                 break;
 518         case NL80211_CMD_PMKSA_CANDIDATE:
 519                 printf("PMKSA candidate found\n");
 520                 break;
 521         case NL80211_CMD_SET_WOWLAN:
 522                 parse_wowlan_wake_event(tb);
 523                 break;
 524         case NL80211_CMD_PROBE_CLIENT:
 525                 if (tb[NL80211_ATTR_MAC])
 526                         mac_addr_n2a(macbuf, nla_data(tb[NL80211_ATTR_MAC]));
 527                 else
 528                         strcpy(macbuf, "??");
 529                 printf("probe client %s (cookie %llx): %s\n",
 530                        macbuf,
 531                        (unsigned long long)nla_get_u64(tb[NL80211_ATTR_COOKIE]),
 532                        tb[NL80211_ATTR_ACK] ? "acked" : "no ack");
 533                 break;
 534         case NL80211_CMD_VENDOR:
 535                 printf("vendor event %.6x:%d\n",
 536                         nla_get_u32(tb[NL80211_ATTR_VENDOR_ID]),
 537                         nla_get_u32(tb[NL80211_ATTR_VENDOR_SUBCMD]));
 538                 break;
 539         default:
 540                 printf("unknown event %d\n", gnlh->cmd);
 541                 break;
 542         }
 543
 544         fflush(stdout);
 545         return NL_SKIP;
 546 }
 547
 548 struct wait_event {
 549         int n_cmds;
 550         const __u32 *cmds;
 551         __u32 cmd;
 552         struct print_event_args *pargs;
 553 };
 554
 555 static int wait_event(struct nl_msg *msg, void *arg)
 556 {
 557         struct wait_event *wait = arg;
 558         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 559         int i;
 560
 561         for (i = 0; i < wait->n_cmds; i++) {
 562                 if (gnlh->cmd == wait->cmds[i]) {
 563                         wait->cmd = gnlh->cmd;
 564                         if (wait->pargs)
 565                                 print_event(msg, wait->pargs);
 566                 }
 567         }
 568
 569         return NL_SKIP;
 570 }
 571
 572 int __prepare_listen_events(struct nl80211_state *state)
 573 {
 574         int mcid, ret;
 575
 576         /* Configuration multicast group */
 577         mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "config");
 578         if (mcid < 0)
 579                 return mcid;
 580
 581         ret = nl_socket_add_membership(state->nl_sock, mcid);
 582         if (ret)
 583                 return ret;
 584
 585         /* Scan multicast group */
 586         mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "scan");
 587         if (mcid >= 0) {
 588                 ret = nl_socket_add_membership(state->nl_sock, mcid);
 589                 if (ret)
 590                         return ret;
 591         }
 592
 593         /* Regulatory multicast group */
 594         mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "regulatory");
 595         if (mcid >= 0) {
 596                 ret = nl_socket_add_membership(state->nl_sock, mcid);
 597                 if (ret)
 598                         return ret;
 599         }
 600
 601         /* MLME multicast group */
 602         mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "mlme");
 603         if (mcid >= 0) {
 604                 ret = nl_socket_add_membership(state->nl_sock, mcid);
 605                 if (ret)
 606                         return ret;
 607         }
 608
 609         mcid = nl_get_multicast_id(state->nl_sock, "nl80211", "vendor");
 610         if (mcid >= 0) {
 611                 ret = nl_socket_add_membership(state->nl_sock, mcid);
 612                 if (ret)
 613                         return ret;
 614         }
 615
 616         return 0;
 617 }
 618
 619 __u32 __do_listen_events(struct nl80211_state *state,
 620                          const int n_waits, const __u32 *waits,
 621                          struct print_event_args *args)
 622 {
 623         struct nl_cb *cb = nl_cb_alloc(iw_debug ? NL_CB_DEBUG : NL_CB_DEFAULT);
 624         struct wait_event wait_ev;
 625
 626         if (!cb) {
 627                 fprintf(stderr, "failed to allocate netlink callbacks\n");
 628                 return -ENOMEM;
 629         }
 630
 631         /* no sequence checking for multicast messages */
 632         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 633
 634         if (n_waits && waits) {
 635                 wait_ev.cmds = waits;
 636                 wait_ev.n_cmds = n_waits;
 637                 wait_ev.pargs = args;
 638                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, wait_event, &wait_ev);
 639         } else
 640                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_event, args);
 641
 642         wait_ev.cmd = 0;
 643
 644         while (!wait_ev.cmd)
 645                 nl_recvmsgs(state->nl_sock, cb);
 646
 647         nl_cb_put(cb);
 648
 649         return wait_ev.cmd;
 650 }
 651
 652 __u32 listen_events(struct nl80211_state *state,
 653                     const int n_waits, const __u32 *waits)
 654 {
 655         int ret;
 656
 657         ret = __prepare_listen_events(state);
 658         if (ret)
 659                 return ret;
 660
 661         return __do_listen_events(state, n_waits, waits, NULL);
 662 }
 663
 664 static int print_events(struct nl80211_state *state,
 665                         struct nl_cb *cb,
 666                         struct nl_msg *msg,
 667                         int argc, char **argv,
 668                         enum id_input id)
 669 {
 670         struct print_event_args args;
 671         int ret;
 672
 673         memset(&args, 0, sizeof(args));
 674
 675         argc--;
 676         argv++;
 677
 678         while (argc > 0) {
 679                 if (strcmp(argv[0], "-f") == 0)
 680                         args.frame = true;
 681                 else if (strcmp(argv[0], "-t") == 0)
 682                         args.time = true;
 683                 else if (strcmp(argv[0], "-r") == 0)
 684                         args.reltime = true;
 685                 else
 686                         return 1;
 687                 argc--;
 688                 argv++;
 689         }
 690
 691         if (args.time && args.reltime)
 692                 return 1;
 693
 694         if (argc)
 695                 return 1;
 696
 697         ret = __prepare_listen_events(state);
 698         if (ret)
 699                 return ret;
 700
 701         return __do_listen_events(state, 0, NULL, &args);
 702 }
 703 TOPLEVEL(event, "[-t] [-r] [-f]", 0, 0, CIB_NONE, print_events,
 704         "Monitor events from the kernel.\n"
 705         "-t - print timestamp\n"
 706         "-r - print relative timstamp\n"
 707         "-f - print full frame for auth/assoc etc.");