source3/utils/nmblookup.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NBT client - used to lookup netbios names
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jelmer Vernooij 2003 (Conversion to popt)
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "popt_common.h"
  24
  25 extern bool AllowDebugChange;
  26
  27 static bool give_flags = false;
  28 static bool use_bcast = true;
  29 static bool got_bcast = false;
  30 static struct sockaddr_storage bcast_addr;
  31 static bool recursion_desired = false;
  32 static bool translate_addresses = false;
  33 static int ServerFD= -1;
  34 static bool RootPort = false;
  35 static bool find_status = false;
  36
  37 /****************************************************************************
  38  Open the socket communication.
  39 **************************************************************************/
  40
  41 static bool open_sockets(void)
  42 {
  43         struct sockaddr_storage ss;
  44         const char *sock_addr = lp_socket_address();
  45
  46         if (!interpret_string_addr(&ss, sock_addr,
  47                                 AI_NUMERICHOST|AI_PASSIVE)) {
  48                 DEBUG(0,("open_sockets: unable to get socket address "
  49                                         "from string %s", sock_addr));
  50                 return false;
  51         }
  52         ServerFD = open_socket_in( SOCK_DGRAM,
  53                                 (RootPort ? 137 : 0),
  54                                 (RootPort ?   0 : 3),
  55                                 &ss, true );
  56
  57         if (ServerFD == -1) {
  58                 return false;
  59         }
  60
  61         set_socket_options( ServerFD, "SO_BROADCAST" );
  62
  63         DEBUG(3, ("Socket opened.\n"));
  64         return true;
  65 }
  66
  67 /****************************************************************************
  68 turn a node status flags field into a string
  69 ****************************************************************************/
  70 static char *node_status_flags(unsigned char flags)
  71 {
  72         static fstring ret;
  73         fstrcpy(ret,"");
  74
  75         fstrcat(ret, (flags & 0x80) ? "<GROUP> " : "        ");
  76         if ((flags & 0x60) == 0x00) fstrcat(ret,"B ");
  77         if ((flags & 0x60) == 0x20) fstrcat(ret,"P ");
  78         if ((flags & 0x60) == 0x40) fstrcat(ret,"M ");
  79         if ((flags & 0x60) == 0x60) fstrcat(ret,"H ");
  80         if (flags & 0x10) fstrcat(ret,"<DEREGISTERING> ");
  81         if (flags & 0x08) fstrcat(ret,"<CONFLICT> ");
  82         if (flags & 0x04) fstrcat(ret,"<ACTIVE> ");
  83         if (flags & 0x02) fstrcat(ret,"<PERMANENT> ");
  84
  85         return ret;
  86 }
  87
  88 /****************************************************************************
  89  Turn the NMB Query flags into a string.
  90 ****************************************************************************/
  91
  92 static char *query_flags(int flags)
  93 {
  94         static fstring ret1;
  95         fstrcpy(ret1, "");
  96
  97         if (flags & NM_FLAGS_RS) fstrcat(ret1, "Response ");
  98         if (flags & NM_FLAGS_AA) fstrcat(ret1, "Authoritative ");
  99         if (flags & NM_FLAGS_TC) fstrcat(ret1, "Truncated ");
 100         if (flags & NM_FLAGS_RD) fstrcat(ret1, "Recursion_Desired ");
 101         if (flags & NM_FLAGS_RA) fstrcat(ret1, "Recursion_Available ");
 102         if (flags & NM_FLAGS_B)  fstrcat(ret1, "Broadcast ");
 103
 104         return ret1;
 105 }
 106
 107 /****************************************************************************
 108  Do a node status query.
 109 ****************************************************************************/
 110
 111 static void do_node_status(int fd,
 112                 const char *name,
 113                 int type,
 114                 struct sockaddr_storage *pss)
 115 {
 116         struct nmb_name nname;
 117         int count, i, j;
 118         NODE_STATUS_STRUCT *status;
 119         struct node_status_extra extra;
 120         fstring cleanname;
 121         char addr[INET6_ADDRSTRLEN];
 122
 123         print_sockaddr(addr, sizeof(addr), pss);
 124         d_printf("Looking up status of %s\n",addr);
 125         make_nmb_name(&nname, name, type);
 126         status = node_status_query(fd, &nname, pss, &count, &extra);
 127         if (status) {
 128                 for (i=0;i<count;i++) {
 129                         pull_ascii_fstring(cleanname, status[i].name);
 130                         for (j=0;cleanname[j];j++) {
 131                                 if (!isprint((int)cleanname[j])) {
 132                                         cleanname[j] = '.';
 133                                 }
 134                         }
 135                         d_printf("\t%-15s <%02x> - %s\n",
 136                                cleanname,status[i].type,
 137                                node_status_flags(status[i].flags));
 138                 }
 139                 d_printf("\n\tMAC Address = %02X-%02X-%02X-%02X-%02X-%02X\n",
 140                                 extra.mac_addr[0], extra.mac_addr[1],
 141                                 extra.mac_addr[2], extra.mac_addr[3],
 142                                 extra.mac_addr[4], extra.mac_addr[5]);
 143                 d_printf("\n");
 144                 SAFE_FREE(status);
 145         } else {
 146                 d_printf("No reply from %s\n\n",addr);
 147         }
 148 }
 149
 150
 151 /****************************************************************************
 152  Send out one query.
 153 ****************************************************************************/
 154
 155 static bool query_one(const char *lookup, unsigned int lookup_type)
 156 {
 157         int j, count, flags = 0;
 158         struct sockaddr_storage *ip_list=NULL;
 159
 160         if (got_bcast) {
 161                 char addr[INET6_ADDRSTRLEN];
 162                 print_sockaddr(addr, sizeof(addr), &bcast_addr);
 163                 d_printf("querying %s on %s\n", lookup, addr);
 164                 ip_list = name_query(ServerFD,lookup,lookup_type,use_bcast,
 165                                      use_bcast?true:recursion_desired,
 166                                      &bcast_addr, &count, &flags, NULL);
 167         } else {
 168                 const struct in_addr *bcast;
 169                 for (j=iface_count() - 1;
 170                      !ip_list && j >= 0;
 171                      j--) {
 172                         char addr[INET6_ADDRSTRLEN];
 173                         struct sockaddr_storage bcast_ss;
 174
 175                         bcast = iface_n_bcast_v4(j);
 176                         if (!bcast) {
 177                                 continue;
 178                         }
 179                         in_addr_to_sockaddr_storage(&bcast_ss, *bcast);
 180                         print_sockaddr(addr, sizeof(addr), &bcast_ss);
 181                         d_printf("querying %s on %s\n",
 182                                lookup, addr);
 183                         ip_list = name_query(ServerFD,lookup,lookup_type,
 184                                              use_bcast,
 185                                              use_bcast?True:recursion_desired,
 186                                              &bcast_ss,&count, &flags, NULL);
 187                 }
 188         }
 189
 190         if (!ip_list) {
 191                 return false;
 192         }
 193
 194         if (give_flags) {
 195                 d_printf("Flags: %s\n", query_flags(flags));
 196         }
 197
 198         for (j=0;j<count;j++) {
 199                 char addr[INET6_ADDRSTRLEN];
 200                 if (translate_addresses) {
 201                         char h_name[MAX_DNS_NAME_LENGTH];
 202                         h_name[0] = '\0';
 203                         if (sys_getnameinfo((const struct sockaddr *)&ip_list[j],
 204                                         sizeof(struct sockaddr_storage),
 205                                         h_name, sizeof(h_name),
 206                                         NULL, 0,
 207                                         NI_NAMEREQD)) {
 208                                 continue;
 209                         }
 210                         d_printf("%s, ", h_name);
 211                 }
 212                 print_sockaddr(addr, sizeof(addr), &ip_list[j]);
 213                 d_printf("%s %s<%02x>\n", addr,lookup, lookup_type);
 214                 /* We can only do find_status if the ip address returned
 215                    was valid - ie. name_query returned true.
 216                  */
 217                 if (find_status) {
 218                         do_node_status(ServerFD, lookup,
 219                                         lookup_type, &ip_list[j]);
 220                 }
 221         }
 222
 223         free(ip_list);
 224
 225         return (ip_list != NULL);
 226 }
 227
 228
 229 /****************************************************************************
 230   main program
 231 ****************************************************************************/
 232 int main(int argc,char *argv[])
 233 {
 234         int opt;
 235         unsigned int lookup_type = 0x0;
 236         fstring lookup;
 237         static bool find_master=False;
 238         static bool lookup_by_ip = False;
 239         poptContext pc;
 240         TALLOC_CTX *frame = talloc_stackframe();
 241
 242         struct poptOption long_options[] = {
 243                 POPT_AUTOHELP
 244                 { "broadcast", 'B', POPT_ARG_STRING, NULL, 'B', "Specify address to use for broadcasts", "BROADCAST-ADDRESS" },
 245                 { "flags", 'f', POPT_ARG_NONE, NULL, 'f', "List the NMB flags returned" },
 246                 { "unicast", 'U', POPT_ARG_STRING, NULL, 'U', "Specify address to use for unicast" },
 247                 { "master-browser", 'M', POPT_ARG_NONE, NULL, 'M', "Search for a master browser" },
 248                 { "recursion", 'R', POPT_ARG_NONE, NULL, 'R', "Set recursion desired in package" },
 249                 { "status", 'S', POPT_ARG_NONE, NULL, 'S', "Lookup node status as well" },
 250                 { "translate", 'T', POPT_ARG_NONE, NULL, 'T', "Translate IP addresses into names" },
 251                 { "root-port", 'r', POPT_ARG_NONE, NULL, 'r', "Use root port 137 (Win95 only replies to this)" },
 252                 { "lookup-by-ip", 'A', POPT_ARG_NONE, NULL, 'A', "Do a node status on <name> as an IP Address" },
 253                 POPT_COMMON_SAMBA
 254                 POPT_COMMON_CONNECTION
 255                 { 0, 0, 0, 0 }
 256         };
 257
 258         *lookup = 0;
 259
 260         load_case_tables();
 261
 262         setup_logging(argv[0], DEBUG_STDOUT);
 263
 264         pc = poptGetContext("nmblookup", argc, (const char **)argv,
 265                         long_options, POPT_CONTEXT_KEEP_FIRST);
 266
 267         poptSetOtherOptionHelp(pc, "<NODE> ...");
 268
 269         while ((opt = poptGetNextOpt(pc)) != -1) {
 270                 switch (opt) {
 271                 case 'f':
 272                         give_flags = true;
 273                         break;
 274                 case 'M':
 275                         find_master = true;
 276                         break;
 277                 case 'R':
 278                         recursion_desired = true;
 279                         break;
 280                 case 'S':
 281                         find_status = true;
 282                         break;
 283                 case 'r':
 284                         RootPort = true;
 285                         break;
 286                 case 'A':
 287                         lookup_by_ip = true;
 288                         break;
 289                 case 'B':
 290                         if (interpret_string_addr(&bcast_addr,
 291                                         poptGetOptArg(pc),
 292                                         NI_NUMERICHOST)) {
 293                                 got_bcast = True;
 294                                 use_bcast = True;
 295                         }
 296                         break;
 297                 case 'U':
 298                         if (interpret_string_addr(&bcast_addr,
 299                                         poptGetOptArg(pc),
 300                                         0)) {
 301                                 got_bcast = True;
 302                                 use_bcast = False;
 303                         }
 304                         break;
 305                 case 'T':
 306                         translate_addresses = !translate_addresses;
 307                         break;
 308                 }
 309         }
 310
 311         poptGetArg(pc); /* Remove argv[0] */
 312
 313         if(!poptPeekArg(pc)) {
 314                 poptPrintUsage(pc, stderr, 0);
 315                 exit(1);
 316         }
 317
 318         if (!lp_load(get_dyn_CONFIGFILE(),True,False,False,True)) {
 319                 fprintf(stderr, "Can't load %s - run testparm to debug it\n",
 320                                 get_dyn_CONFIGFILE());
 321         }
 322
 323         load_interfaces();
 324         if (!open_sockets()) {
 325                 return(1);
 326         }
 327
 328         while(poptPeekArg(pc)) {
 329                 char *p;
 330                 struct in_addr ip;
 331
 332                 fstrcpy(lookup,poptGetArg(pc));
 333
 334                 if(lookup_by_ip) {
 335                         struct sockaddr_storage ss;
 336                         ip = interpret_addr2(lookup);
 337                         in_addr_to_sockaddr_storage(&ss, ip);
 338                         fstrcpy(lookup,"*");
 339                         do_node_status(ServerFD, lookup, lookup_type, &ss);
 340                         continue;
 341                 }
 342
 343                 if (find_master) {
 344                         if (*lookup == '-') {
 345                                 fstrcpy(lookup,"\01\02__MSBROWSE__\02");
 346                                 lookup_type = 1;
 347                         } else {
 348                                 lookup_type = 0x1d;
 349                         }
 350                 }
 351
 352                 p = strchr_m(lookup,'#');
 353                 if (p) {
 354                         *p = '\0';
 355                         sscanf(++p,"%x",&lookup_type);
 356                 }
 357
 358                 if (!query_one(lookup, lookup_type)) {
 359                         d_printf( "name_query failed to find name %s", lookup );
 360                         if( 0 != lookup_type ) {
 361                                 d_printf( "#%02x", lookup_type );
 362                         }
 363                         d_printf( "\n" );
 364                 }
 365         }
 366
 367         poptFreeContext(pc);
 368         TALLOC_FREE(frame);
 369         return(0);
 370 }