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