tools/tools/net80211/wlanwatch/wlanwatch.c

   1 /*-
   2  * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification.
  11  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  12  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
  13  *    redistribution must be conditioned upon including a substantially
  14  *    similar Disclaimer requirement for further binary redistribution.
  15  *
  16  * NO WARRANTY
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
  20  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  21  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
  22  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  27  * THE POSSIBILITY OF SUCH DAMAGES.
  28  *
  29  * $FreeBSD$
  30  */
  31
  32 /*
  33  * Monitor 802.11 events using a routing socket.
  34  * Code liberaly swiped from route(8).
  35  */
  36 #include <sys/param.h>
  37 #include <sys/file.h>
  38 #include <sys/socket.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/sysctl.h>
  41 #include <sys/types.h>
  42
  43 #include <net/if.h>
  44 #include <net/route.h>
  45 #include <net/if_dl.h>
  46 #include <netinet/in.h>
  47 #include <netinet/if_ether.h>
  48 #ifdef __NetBSD__
  49 #include <net80211/ieee80211_netbsd.h>
  50 #elif __FreeBSD__
  51 #include <net80211/ieee80211_freebsd.h>
  52 #else
  53 #error  "No support for your operating system!"
  54 #endif
  55 #include <arpa/inet.h>
  56 #include <netdb.h>
  57
  58 #include <ctype.h>
  59 #include <err.h>
  60 #include <errno.h>
  61 #include <paths.h>
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <string.h>
  65 #include <sysexits.h>
  66 #include <unistd.h>
  67 #include <ifaddrs.h>
  68
  69 /* XXX */
  70 enum ieee80211_notify_cac_event {
  71         IEEE80211_NOTIFY_CAC_START  = 0, /* CAC timer started */
  72         IEEE80211_NOTIFY_CAC_STOP   = 1, /* CAC intentionally stopped */
  73         IEEE80211_NOTIFY_CAC_RADAR  = 2, /* CAC stopped due to radar detectio */
  74         IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */
  75 };
  76
  77 static  void print_rtmsg(struct rt_msghdr *rtm, int msglen);
  78
  79 int     nflag = 0;
  80
  81 int
  82 main(int argc, char *argv[])
  83 {
  84         int n, s;
  85         char msg[2048];
  86
  87         s = socket(PF_ROUTE, SOCK_RAW, 0);
  88         if (s < 0)
  89                 err(EX_OSERR, "socket");
  90         for(;;) {
  91                 n = read(s, msg, 2048);
  92                 print_rtmsg((struct rt_msghdr *)msg, n);
  93         }
  94         return 0;
  95 }
  96
  97 static void
  98 bprintf(FILE *fp, int b, char *s)
  99 {
 100         int i;
 101         int gotsome = 0;
 102
 103         if (b == 0)
 104                 return;
 105         while ((i = *s++) != 0) {
 106                 if (b & (1 << (i-1))) {
 107                         if (gotsome == 0)
 108                                 i = '<';
 109                         else
 110                                 i = ',';
 111                         (void) putc(i, fp);
 112                         gotsome = 1;
 113                         for (; (i = *s) > 32; s++)
 114                                 (void) putc(i, fp);
 115                 } else
 116                         while (*s > 32)
 117                                 s++;
 118         }
 119         if (gotsome)
 120                 putc('>', fp);
 121 }
 122
 123 char metricnames[] =
 124 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
 125 "\1mtu";
 126 char routeflags[] =
 127 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
 128 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
 129 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
 130 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
 131 char ifnetflags[] =
 132 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
 133 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
 134 "\017LINK2\020MULTICAST";
 135 char addrnames[] =
 136 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
 137
 138 static const char *
 139 routename(struct sockaddr *sa)
 140 {
 141         char *cp;
 142         static char line[MAXHOSTNAMELEN + 1];
 143         struct hostent *hp;
 144         static char domain[MAXHOSTNAMELEN + 1];
 145         static int first = 1, n;
 146
 147         if (first) {
 148                 first = 0;
 149                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 150                     (cp = strchr(domain, '.'))) {
 151                         domain[MAXHOSTNAMELEN] = '\0';
 152                         (void) strcpy(domain, cp + 1);
 153                 } else
 154                         domain[0] = 0;
 155         }
 156
 157         if (sa->sa_len == 0)
 158                 strcpy(line, "default");
 159         else switch (sa->sa_family) {
 160
 161         case AF_INET:
 162             {   struct in_addr in;
 163                 in = ((struct sockaddr_in *)sa)->sin_addr;
 164
 165                 cp = 0;
 166                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 167                         cp = "default";
 168                 if (cp == 0 && !nflag) {
 169                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 170                                 AF_INET);
 171                         if (hp) {
 172                                 if ((cp = strchr(hp->h_name, '.')) &&
 173                                     !strcmp(cp + 1, domain))
 174                                         *cp = 0;
 175                                 cp = hp->h_name;
 176                         }
 177                 }
 178                 if (cp) {
 179                         strncpy(line, cp, sizeof(line) - 1);
 180                         line[sizeof(line) - 1] = '\0';
 181                 } else
 182                         (void) sprintf(line, "%s", inet_ntoa(in));
 183                 break;
 184             }
 185
 186 #ifdef INET6
 187         case AF_INET6:
 188         {
 189                 struct sockaddr_in6 sin6; /* use static var for safety */
 190                 int niflags = 0;
 191 #ifdef NI_WITHSCOPEID
 192                 niflags = NI_WITHSCOPEID;
 193 #endif
 194
 195                 memset(&sin6, 0, sizeof(sin6));
 196                 memcpy(&sin6, sa, sa->sa_len);
 197                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 198                 sin6.sin6_family = AF_INET6;
 199 #ifdef __KAME__
 200                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 201                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 202                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 203                     sin6.sin6_scope_id == 0) {
 204                         sin6.sin6_scope_id =
 205                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 206                         sin6.sin6_addr.s6_addr[2] = 0;
 207                         sin6.sin6_addr.s6_addr[3] = 0;
 208                 }
 209 #endif
 210                 if (nflag)
 211                         niflags |= NI_NUMERICHOST;
 212                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 213                     line, sizeof(line), NULL, 0, niflags) != 0)
 214                         strncpy(line, "invalid", sizeof(line));
 215
 216                 return(line);
 217         }
 218 #endif
 219
 220         case AF_LINK:
 221                 return (link_ntoa((struct sockaddr_dl *)sa));
 222
 223         default:
 224             {   u_short *s = (u_short *)sa;
 225                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 226                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 227                 char *cpe = line + sizeof(line);
 228
 229                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 230                         if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0)
 231                                 cp += n;
 232                         else
 233                                 *cp = '\0';
 234                 break;
 235             }
 236         }
 237         return (line);
 238 }
 239
 240 #ifndef SA_SIZE
 241 /*
 242  * This macro returns the size of a struct sockaddr when passed
 243  * through a routing socket. Basically we round up sa_len to
 244  * a multiple of sizeof(long), with a minimum of sizeof(long).
 245  * The check for a NULL pointer is just a convenience, probably never used.
 246  * The case sa_len == 0 should only apply to empty structures.
 247  */
 248 #define SA_SIZE(sa)                                             \
 249     (  (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ?      \
 250         sizeof(long)            :                               \
 251         1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
 252 #endif
 253
 254 static void
 255 pmsg_addrs(char *cp, int addrs)
 256 {
 257         struct sockaddr *sa;
 258         int i;
 259
 260         if (addrs == 0) {
 261                 (void) putchar('\n');
 262                 return;
 263         }
 264         printf("\nsockaddrs: ");
 265         bprintf(stdout, addrs, addrnames);
 266         putchar('\n');
 267         for (i = 1; i; i <<= 1)
 268                 if (i & addrs) {
 269                         sa = (struct sockaddr *)cp;
 270                         printf(" %s", routename(sa));
 271                         cp += SA_SIZE(sa);
 272                 }
 273         putchar('\n');
 274 }
 275
 276 static const char *
 277 ether_sprintf(const uint8_t mac[6])
 278 {
 279         static char buf[32];
 280
 281         snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
 282                 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 283         return buf;
 284 }
 285
 286 static void
 287 print_rtmsg(struct rt_msghdr *rtm, int msglen)
 288 {
 289         struct if_msghdr *ifm;
 290         struct if_announcemsghdr *ifan;
 291         time_t now = time(NULL);
 292         char *cnow = ctime(&now);
 293
 294         if (rtm->rtm_version != RTM_VERSION) {
 295                 (void) printf("routing message version %d not understood\n",
 296                     rtm->rtm_version);
 297                 return;
 298         }
 299         switch (rtm->rtm_type) {
 300         case RTM_IFINFO:
 301                 ifm = (struct if_msghdr *)rtm;
 302                 printf("%.19s RTM_IFINFO: if# %d, ",
 303                         cnow, ifm->ifm_index);
 304                 switch (ifm->ifm_data.ifi_link_state) {
 305                 case LINK_STATE_DOWN:
 306                         printf("link: down, flags:");
 307                         break;
 308                 case LINK_STATE_UP:
 309                         printf("link: up, flags:");
 310                         break;
 311                 default:
 312                         printf("link: unknown<%d>, flags:",
 313                             ifm->ifm_data.ifi_link_state);
 314                         break;
 315                 }
 316                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
 317                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
 318                 fflush(stdout);
 319                 break;
 320         case RTM_IFANNOUNCE:
 321                 ifan = (struct if_announcemsghdr *)rtm;
 322                 printf("%.19s RTM_IFANNOUNCE: if# %d, what: ",
 323                         cnow, ifan->ifan_index);
 324                 switch (ifan->ifan_what) {
 325                 case IFAN_ARRIVAL:
 326                         printf("arrival");
 327                         break;
 328                 case IFAN_DEPARTURE:
 329                         printf("departure");
 330                         break;
 331                 default:
 332                         printf("#%d", ifan->ifan_what);
 333                         break;
 334                 }
 335                 printf("\n");
 336                 fflush(stdout);
 337                 break;
 338         case RTM_IEEE80211:
 339 #define V(type) ((struct type *)(&ifan[1]))
 340                 ifan = (struct if_announcemsghdr *)rtm;
 341                 printf("%.19s RTM_IEEE80211: if# %d, ", cnow, ifan->ifan_index);
 342                 switch (ifan->ifan_what) {
 343                 case RTM_IEEE80211_ASSOC:
 344                         printf("associate with %s",
 345                             ether_sprintf(V(ieee80211_join_event)->iev_addr));
 346                         break;
 347                 case RTM_IEEE80211_REASSOC:
 348                         printf("reassociate with %s",
 349                             ether_sprintf(V(ieee80211_join_event)->iev_addr));
 350                         break;
 351                 case RTM_IEEE80211_DISASSOC:
 352                         printf("disassociate");
 353                         break;
 354                 case RTM_IEEE80211_JOIN:
 355                 case RTM_IEEE80211_REJOIN:
 356                         printf("%s station %sjoin",
 357                             ether_sprintf(V(ieee80211_join_event)->iev_addr),
 358                             ifan->ifan_what == RTM_IEEE80211_REJOIN ? "re" : ""
 359                         );
 360                         break;
 361                 case RTM_IEEE80211_LEAVE:
 362                         printf("%s station leave",
 363                             ether_sprintf(V(ieee80211_leave_event)->iev_addr));
 364                         break;
 365                 case RTM_IEEE80211_SCAN:
 366                         printf("scan complete");
 367                         break;
 368                 case RTM_IEEE80211_REPLAY:
 369                         printf("replay failure: src %s "
 370                             , ether_sprintf(V(ieee80211_replay_event)->iev_src)
 371                         );
 372                         printf("dst %s cipher %u keyix %u keyrsc %llu rsc %llu"
 373                             , ether_sprintf(V(ieee80211_replay_event)->iev_dst)
 374                             , V(ieee80211_replay_event)->iev_cipher
 375                             , V(ieee80211_replay_event)->iev_keyix
 376                             , V(ieee80211_replay_event)->iev_keyrsc
 377                             , V(ieee80211_replay_event)->iev_rsc
 378                         );
 379                         break;
 380                 case RTM_IEEE80211_MICHAEL:
 381                         printf("michael failure: src %s "
 382                             , ether_sprintf(V(ieee80211_michael_event)->iev_src)
 383                         );
 384                         printf("dst %s cipher %u keyix %u"
 385                             , ether_sprintf(V(ieee80211_michael_event)->iev_dst)
 386                             , V(ieee80211_michael_event)->iev_cipher
 387                             , V(ieee80211_michael_event)->iev_keyix
 388                         );
 389                         break;
 390                 case RTM_IEEE80211_WDS:
 391                         printf("%s wds discovery",
 392                             ether_sprintf(V(ieee80211_wds_event)->iev_addr));
 393                         break;
 394                 case RTM_IEEE80211_CSA:
 395                         printf("channel switch announcement: channel %u (%u MHz flags 0x%x) mode %d count %d"
 396                             , V(ieee80211_csa_event)->iev_ieee
 397                             , V(ieee80211_csa_event)->iev_freq
 398                             , V(ieee80211_csa_event)->iev_flags
 399                             , V(ieee80211_csa_event)->iev_mode
 400                             , V(ieee80211_csa_event)->iev_count
 401                         );
 402                         break;
 403                 case RTM_IEEE80211_CAC:
 404                         printf("channel availability check "
 405                             "(channel %u, %u MHz flags 0x%x) "
 406                             , V(ieee80211_cac_event)->iev_ieee
 407                             , V(ieee80211_cac_event)->iev_freq
 408                             , V(ieee80211_cac_event)->iev_flags
 409                         );
 410                         switch (V(ieee80211_cac_event)->iev_type) {
 411                         case IEEE80211_NOTIFY_CAC_START:
 412                                 printf("start timer");
 413                                 break;
 414                         case IEEE80211_NOTIFY_CAC_STOP:
 415                                 printf("stop timer");
 416                                 break;
 417                         case IEEE80211_NOTIFY_CAC_EXPIRE:
 418                                 printf("timer expired");
 419                                 break;
 420                         case IEEE80211_NOTIFY_CAC_RADAR:
 421                                 printf("radar detected");
 422                                 break;
 423                         default:
 424                                 printf("unknown type %d",
 425                                    V(ieee80211_cac_event)->iev_type);
 426                                 break;
 427                         }
 428                         break;
 429                 case RTM_IEEE80211_DEAUTH:
 430                         printf("%s wds deauth",
 431                             ether_sprintf(V(ieee80211_deauth_event)->iev_addr));
 432                         break;
 433                 case RTM_IEEE80211_AUTH:
 434                         printf("%s node authenticate",
 435                             ether_sprintf(V(ieee80211_auth_event)->iev_addr));
 436                         break;
 437                 case RTM_IEEE80211_COUNTRY:
 438                         printf("%s adopt country code '%c%c'",
 439                             ether_sprintf(V(ieee80211_country_event)->iev_addr),
 440                             V(ieee80211_country_event)->iev_cc[0],
 441                             V(ieee80211_country_event)->iev_cc[1]);
 442                         break;
 443                 case RTM_IEEE80211_RADIO:
 444                         printf("radio %s",
 445                             V(ieee80211_radio_event)->iev_state ? "ON" : "OFF");
 446                         break;
 447                 default:
 448                         printf("what: #%d", ifan->ifan_what);
 449                         break;
 450                 }
 451                 printf("\n");
 452                 fflush(stdout);
 453                 break;
 454 #undef V
 455         }
 456 }