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: src/tools/tools/net80211/wlanwatch/wlanwatch.c,v 1.6 2008/05/19 17:51:00 thompsa Exp $
  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 #include <netatalk/at.h>
  49 #include <netproto/802_11/ieee80211_dragonfly.h>
  50 #include <arpa/inet.h>
  51 #include <netdb.h>
  52
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <paths.h>
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <sysexits.h>
  61 #include <unistd.h>
  62 #include <ifaddrs.h>
  63
  64 /* XXX */
  65 enum ieee80211_notify_cac_event {
  66         IEEE80211_NOTIFY_CAC_START  = 0, /* CAC timer started */
  67         IEEE80211_NOTIFY_CAC_STOP   = 1, /* CAC intentionally stopped */
  68         IEEE80211_NOTIFY_CAC_RADAR  = 2, /* CAC stopped due to radar detectio */
  69         IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */
  70 };
  71
  72 static  void print_rtmsg(struct rt_msghdr *rtm, int msglen);
  73
  74 int     nflag = 0;
  75
  76 int
  77 main(int argc, char *argv[])
  78 {
  79         int n, s;
  80         char msg[2048];
  81
  82         s = socket(PF_ROUTE, SOCK_RAW, 0);
  83         if (s < 0)
  84                 err(EX_OSERR, "socket");
  85         for(;;) {
  86                 n = read(s, msg, 2048);
  87                 print_rtmsg((struct rt_msghdr *)msg, n);
  88         }
  89         return 0;
  90 }
  91
  92 static void
  93 bprintf(FILE *fp, int b, char *s)
  94 {
  95         int i;
  96         int gotsome = 0;
  97
  98         if (b == 0)
  99                 return;
 100         while ((i = *s++) != 0) {
 101                 if (b & (1 << (i-1))) {
 102                         if (gotsome == 0)
 103                                 i = '<';
 104                         else
 105                                 i = ',';
 106                         (void) putc(i, fp);
 107                         gotsome = 1;
 108                         for (; (i = *s) > 32; s++)
 109                                 (void) putc(i, fp);
 110                 } else
 111                         while (*s > 32)
 112                                 s++;
 113         }
 114         if (gotsome)
 115                 putc('>', fp);
 116 }
 117
 118 char metricnames[] =
 119 "\011pksent\010rttvar\7rtt\6ssthresh\5sendpipe\4recvpipe\3expire\2hopcount"
 120 "\1mtu";
 121 char routeflags[] =
 122 "\1UP\2GATEWAY\3HOST\4REJECT\5DYNAMIC\6MODIFIED\7DONE\010MASK_PRESENT"
 123 "\011CLONING\012XRESOLVE\013LLINFO\014STATIC\015BLACKHOLE\016b016"
 124 "\017PROTO2\020PROTO1\021PRCLONING\022WASCLONED\023PROTO3\024CHAINDELETE"
 125 "\025PINNED\026LOCAL\027BROADCAST\030MULTICAST";
 126 char ifnetflags[] =
 127 "\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5PTP\6b6\7RUNNING\010NOARP"
 128 "\011PPROMISC\012ALLMULTI\013OACTIVE\014SIMPLEX\015LINK0\016LINK1"
 129 "\017LINK2\020MULTICAST";
 130 char addrnames[] =
 131 "\1DST\2GATEWAY\3NETMASK\4GENMASK\5IFP\6IFA\7AUTHOR\010BRD";
 132
 133 static const char *
 134 routename(struct sockaddr *sa)
 135 {
 136         char *cp;
 137         static char line[MAXHOSTNAMELEN + 1];
 138         struct hostent *hp;
 139         static char domain[MAXHOSTNAMELEN + 1];
 140         static int first = 1, n;
 141
 142         if (first) {
 143                 first = 0;
 144                 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
 145                     (cp = strchr(domain, '.'))) {
 146                         domain[MAXHOSTNAMELEN] = '\0';
 147                         (void) strcpy(domain, cp + 1);
 148                 } else
 149                         domain[0] = 0;
 150         }
 151
 152         if (sa->sa_len == 0)
 153                 strcpy(line, "default");
 154         else switch (sa->sa_family) {
 155
 156         case AF_INET:
 157             {   struct in_addr in;
 158                 in = ((struct sockaddr_in *)sa)->sin_addr;
 159
 160                 cp = 0;
 161                 if (in.s_addr == INADDR_ANY || sa->sa_len < 4)
 162                         cp = "default";
 163                 if (cp == 0 && !nflag) {
 164                         hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
 165                                 AF_INET);
 166                         if (hp) {
 167                                 if ((cp = strchr(hp->h_name, '.')) &&
 168                                     !strcmp(cp + 1, domain))
 169                                         *cp = 0;
 170                                 cp = hp->h_name;
 171                         }
 172                 }
 173                 if (cp) {
 174                         strncpy(line, cp, sizeof(line) - 1);
 175                         line[sizeof(line) - 1] = '\0';
 176                 } else
 177                         (void) sprintf(line, "%s", inet_ntoa(in));
 178                 break;
 179             }
 180
 181 #ifdef INET6
 182         case AF_INET6:
 183         {
 184                 struct sockaddr_in6 sin6; /* use static var for safety */
 185                 int niflags = 0;
 186 #ifdef NI_WITHSCOPEID
 187                 niflags = NI_WITHSCOPEID;
 188 #endif
 189
 190                 memset(&sin6, 0, sizeof(sin6));
 191                 memcpy(&sin6, sa, sa->sa_len);
 192                 sin6.sin6_len = sizeof(struct sockaddr_in6);
 193                 sin6.sin6_family = AF_INET6;
 194 #ifdef __KAME__
 195                 if (sa->sa_len == sizeof(struct sockaddr_in6) &&
 196                     (IN6_IS_ADDR_LINKLOCAL(&sin6.sin6_addr) ||
 197                      IN6_IS_ADDR_MC_LINKLOCAL(&sin6.sin6_addr)) &&
 198                     sin6.sin6_scope_id == 0) {
 199                         sin6.sin6_scope_id =
 200                             ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
 201                         sin6.sin6_addr.s6_addr[2] = 0;
 202                         sin6.sin6_addr.s6_addr[3] = 0;
 203                 }
 204 #endif
 205                 if (nflag)
 206                         niflags |= NI_NUMERICHOST;
 207                 if (getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
 208                     line, sizeof(line), NULL, 0, niflags) != 0)
 209                         strncpy(line, "invalid", sizeof(line));
 210
 211                 return(line);
 212         }
 213 #endif
 214
 215         case AF_LINK:
 216                 return (link_ntoa((struct sockaddr_dl *)sa));
 217
 218         default:
 219             {   u_short *s = (u_short *)sa;
 220                 u_short *slim = s + ((sa->sa_len + 1) >> 1);
 221                 char *cp = line + sprintf(line, "(%d)", sa->sa_family);
 222                 char *cpe = line + sizeof(line);
 223
 224                 while (++s < slim && cp < cpe) /* start with sa->sa_data */
 225                         if ((n = snprintf(cp, cpe - cp, " %x", *s)) > 0)
 226                                 cp += n;
 227                         else
 228                                 *cp = '\0';
 229                 break;
 230             }
 231         }
 232         return (line);
 233 }
 234
 235 #ifndef SA_SIZE
 236 /*
 237  * This macro returns the size of a struct sockaddr when passed
 238  * through a routing socket. Basically we round up sa_len to
 239  * a multiple of sizeof(long), with a minimum of sizeof(long).
 240  * The check for a NULL pointer is just a convenience, probably never used.
 241  * The case sa_len == 0 should only apply to empty structures.
 242  */
 243 #define SA_SIZE(sa)                                             \
 244     (  (!(sa) || ((struct sockaddr *)(sa))->sa_len == 0) ?      \
 245         sizeof(long)            :                               \
 246         1 + ( (((struct sockaddr *)(sa))->sa_len - 1) | (sizeof(long) - 1) ) )
 247 #endif
 248
 249 static void
 250 pmsg_addrs(char *cp, int addrs)
 251 {
 252         struct sockaddr *sa;
 253         int i;
 254
 255         if (addrs == 0) {
 256                 (void) putchar('\n');
 257                 return;
 258         }
 259         printf("\nsockaddrs: ");
 260         bprintf(stdout, addrs, addrnames);
 261         putchar('\n');
 262         for (i = 1; i; i <<= 1)
 263                 if (i & addrs) {
 264                         sa = (struct sockaddr *)cp;
 265                         printf(" %s", routename(sa));
 266                         cp += SA_SIZE(sa);
 267                 }
 268         putchar('\n');
 269 }
 270
 271 static const char *
 272 ether_sprintf(const uint8_t mac[6])
 273 {
 274         static char buf[32];
 275
 276         snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
 277                 mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 278         return buf;
 279 }
 280
 281 static void
 282 print_rtmsg(struct rt_msghdr *rtm, int msglen)
 283 {
 284         struct if_msghdr *ifm;
 285         struct if_announcemsghdr *ifan;
 286         time_t now = time(NULL);
 287         char *cnow = ctime(&now);
 288
 289         if (rtm->rtm_version != RTM_VERSION) {
 290                 (void) printf("routing message version %d not understood\n",
 291                     rtm->rtm_version);
 292                 return;
 293         }
 294         switch (rtm->rtm_type) {
 295         case RTM_IFINFO:
 296                 ifm = (struct if_msghdr *)rtm;
 297                 printf("%.19s RTM_IFINFO: if# %d, ",
 298                         cnow, ifm->ifm_index);
 299                 switch (ifm->ifm_data.ifi_link_state) {
 300                 case LINK_STATE_DOWN:
 301                         printf("link: down, flags:");
 302                         break;
 303                 case LINK_STATE_UP:
 304                         printf("link: up, flags:");
 305                         break;
 306                 default:
 307                         printf("link: unknown<%d>, flags:",
 308                             ifm->ifm_data.ifi_link_state);
 309                         break;
 310                 }
 311                 bprintf(stdout, ifm->ifm_flags, ifnetflags);
 312                 pmsg_addrs((char *)(ifm + 1), ifm->ifm_addrs);
 313                 fflush(stdout);
 314                 break;
 315         case RTM_IFANNOUNCE:
 316                 ifan = (struct if_announcemsghdr *)rtm;
 317                 printf("%.19s RTM_IFANNOUNCE: if# %d, what: ",
 318                         cnow, ifan->ifan_index);
 319                 switch (ifan->ifan_what) {
 320                 case IFAN_ARRIVAL:
 321                         printf("arrival");
 322                         break;
 323                 case IFAN_DEPARTURE:
 324                         printf("departure");
 325                         break;
 326                 default:
 327                         printf("#%d", ifan->ifan_what);
 328                         break;
 329                 }
 330                 printf("\n");
 331                 fflush(stdout);
 332                 break;
 333         case RTM_IEEE80211:
 334 #define V(type) ((struct type *)(&ifan[1]))
 335                 ifan = (struct if_announcemsghdr *)rtm;
 336                 printf("%.19s RTM_IEEE80211: if# %d, ", cnow, ifan->ifan_index);
 337                 switch (ifan->ifan_what) {
 338                 case RTM_IEEE80211_ASSOC:
 339                         printf("associate with %s",
 340                             ether_sprintf(V(ieee80211_join_event)->iev_addr));
 341                         break;
 342                 case RTM_IEEE80211_REASSOC:
 343                         printf("reassociate with %s",
 344                             ether_sprintf(V(ieee80211_join_event)->iev_addr));
 345                         break;
 346                 case RTM_IEEE80211_DISASSOC:
 347                         printf("disassociate");
 348                         break;
 349                 case RTM_IEEE80211_JOIN:
 350                 case RTM_IEEE80211_REJOIN:
 351                         printf("%s station %sjoin",
 352                             ether_sprintf(V(ieee80211_join_event)->iev_addr),
 353                             ifan->ifan_what == RTM_IEEE80211_REJOIN ? "re" : ""
 354                         );
 355                         break;
 356                 case RTM_IEEE80211_LEAVE:
 357                         printf("%s station leave",
 358                             ether_sprintf(V(ieee80211_leave_event)->iev_addr));
 359                         break;
 360                 case RTM_IEEE80211_SCAN:
 361                         printf("scan complete");
 362                         break;
 363                 case RTM_IEEE80211_REPLAY:
 364                         printf("replay failure: src %s "
 365                             , ether_sprintf(V(ieee80211_replay_event)->iev_src)
 366                         );
 367                         printf("dst %s cipher %u keyix %u keyrsc %llu rsc %llu"
 368                             , ether_sprintf(V(ieee80211_replay_event)->iev_dst)
 369                             , V(ieee80211_replay_event)->iev_cipher
 370                             , V(ieee80211_replay_event)->iev_keyix
 371                             , V(ieee80211_replay_event)->iev_keyrsc
 372                             , V(ieee80211_replay_event)->iev_rsc
 373                         );
 374                         break;
 375                 case RTM_IEEE80211_MICHAEL:
 376                         printf("michael failure: src %s "
 377                             , ether_sprintf(V(ieee80211_michael_event)->iev_src)
 378                         );
 379                         printf("dst %s cipher %u keyix %u"
 380                             , ether_sprintf(V(ieee80211_michael_event)->iev_dst)
 381                             , V(ieee80211_michael_event)->iev_cipher
 382                             , V(ieee80211_michael_event)->iev_keyix
 383                         );
 384                         break;
 385                 case RTM_IEEE80211_WDS:
 386                         printf("%s wds discovery",
 387                             ether_sprintf(V(ieee80211_wds_event)->iev_addr));
 388                         break;
 389                 case RTM_IEEE80211_CSA:
 390                         printf("channel switch announcement: channel %u (%u MHz flags 0x%x) mode %d count %d"
 391                             , V(ieee80211_csa_event)->iev_ieee
 392                             , V(ieee80211_csa_event)->iev_freq
 393                             , V(ieee80211_csa_event)->iev_flags
 394                             , V(ieee80211_csa_event)->iev_mode
 395                             , V(ieee80211_csa_event)->iev_count
 396                         );
 397                         break;
 398                 case RTM_IEEE80211_CAC:
 399                         printf("channel availability check "
 400                             "(channel %u, %u MHz flags 0x%x) "
 401                             , V(ieee80211_cac_event)->iev_ieee
 402                             , V(ieee80211_cac_event)->iev_freq
 403                             , V(ieee80211_cac_event)->iev_flags
 404                         );
 405                         switch (V(ieee80211_cac_event)->iev_type) {
 406                         case IEEE80211_NOTIFY_CAC_START:
 407                                 printf("start timer");
 408                                 break;
 409                         case IEEE80211_NOTIFY_CAC_STOP:
 410                                 printf("stop timer");
 411                                 break;
 412                         case IEEE80211_NOTIFY_CAC_EXPIRE:
 413                                 printf("timer expired");
 414                                 break;
 415                         case IEEE80211_NOTIFY_CAC_RADAR:
 416                                 printf("radar detected");
 417                                 break;
 418                         default:
 419                                 printf("unknown type %d",
 420                                    V(ieee80211_cac_event)->iev_type);
 421                                 break;
 422                         }
 423                         break;
 424                 case RTM_IEEE80211_DEAUTH:
 425                         printf("%s wds deauth",
 426                             ether_sprintf(V(ieee80211_deauth_event)->iev_addr));
 427                         break;
 428                 case RTM_IEEE80211_AUTH:
 429                         printf("%s node authenticate",
 430                             ether_sprintf(V(ieee80211_auth_event)->iev_addr));
 431                         break;
 432                 case RTM_IEEE80211_COUNTRY:
 433                         printf("%s adopt country code '%c%c'",
 434                             ether_sprintf(V(ieee80211_country_event)->iev_addr),
 435                             V(ieee80211_country_event)->iev_cc[0],
 436                             V(ieee80211_country_event)->iev_cc[1]);
 437                         break;
 438                 case RTM_IEEE80211_RADIO:
 439                         printf("radio %s",
 440                             V(ieee80211_radio_event)->iev_state ? "ON" : "OFF");
 441                         break;
 442                 default:
 443                         printf("what: #%d", ifan->ifan_what);
 444                         break;
 445                 }
 446                 printf("\n");
 447                 fflush(stdout);
 448                 break;
 449 #undef V
 450         }
 451 }