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