source3/libsmb/clierror.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client error handling routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) Jelmer Vernooij 2003
   6    Copyright (C) Jeremy Allison 2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libsmb/libsmb.h"
  24
  25 /*****************************************************
  26  RAP error codes - a small start but will be extended.
  27
  28  XXX: Perhaps these should move into a common function because they're
  29  duplicated in clirap2.c
  30
  31 *******************************************************/
  32
  33 static const struct {
  34         int err;
  35         const char *message;
  36 } rap_errmap[] = {
  37         {5,    "RAP5: User has insufficient privilege" },
  38         {50,   "RAP50: Not supported by server" },
  39         {65,   "RAP65: Access denied" },
  40         {86,   "RAP86: The specified password is invalid" },
  41         {2220, "RAP2220: Group does not exist" },
  42         {2221, "RAP2221: User does not exist" },
  43         {2226, "RAP2226: Operation only permitted on a Primary Domain Controller"  },
  44         {2237, "RAP2237: User is not in group" },
  45         {2242, "RAP2242: The password of this user has expired." },
  46         {2243, "RAP2243: The password of this user cannot change." },
  47         {2244, "RAP2244: This password cannot be used now (password history conflict)." },
  48         {2245, "RAP2245: The password is shorter than required." },
  49         {2246, "RAP2246: The password of this user is too recent to change."},
  50
  51         /* these really shouldn't be here ... */
  52         {0x80, "Not listening on called name"},
  53         {0x81, "Not listening for calling name"},
  54         {0x82, "Called name not present"},
  55         {0x83, "Called name present, but insufficient resources"},
  56
  57         {0, NULL}
  58 };
  59
  60 /****************************************************************************
  61  Return a description of an SMB error.
  62 ****************************************************************************/
  63
  64 static const char *cli_smb_errstr(struct cli_state *cli)
  65 {
  66         return smb_dos_errstr(cli->inbuf);
  67 }
  68
  69 /****************************************************************************
  70  Convert a socket error into an NTSTATUS.
  71 ****************************************************************************/
  72
  73 static NTSTATUS cli_smb_rw_error_to_ntstatus(struct cli_state *cli)
  74 {
  75         switch(cli->smb_rw_error) {
  76                 case SMB_READ_TIMEOUT:
  77                         return NT_STATUS_IO_TIMEOUT;
  78                 case SMB_READ_EOF:
  79                         return NT_STATUS_END_OF_FILE;
  80                 /* What we shoud really do for read/write errors is convert from errno. */
  81                 /* FIXME. JRA. */
  82                 case SMB_READ_ERROR:
  83                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
  84                 case SMB_WRITE_ERROR:
  85                         return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
  86                 case SMB_READ_BAD_SIG:
  87                         return NT_STATUS_INVALID_PARAMETER;
  88                 case SMB_NO_MEMORY:
  89                         return NT_STATUS_NO_MEMORY;
  90                 default:
  91                         break;
  92         }
  93         return NT_STATUS_UNSUCCESSFUL;
  94 }
  95
  96 /***************************************************************************
  97  Return an error message - either an NT error, SMB error or a RAP error.
  98  Note some of the NT errors are actually warnings or "informational" errors
  99  in which case they can be safely ignored.
 100 ****************************************************************************/
 101
 102 const char *cli_errstr(struct cli_state *cli)
 103 {
 104         fstring cli_error_message;
 105         uint32 flgs2 = SVAL(cli->inbuf,smb_flg2), errnum;
 106         uint8 errclass;
 107         int i;
 108         char *result;
 109
 110         if (!cli->initialised) {
 111                 fstrcpy(cli_error_message, "[Programmer's error] cli_errstr called on unitialized cli_stat struct!\n");
 112                 goto done;
 113         }
 114
 115         /* Was it server socket error ? */
 116         if (cli->fd == -1 && cli->smb_rw_error) {
 117                 switch(cli->smb_rw_error) {
 118                         case SMB_READ_TIMEOUT:
 119                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 120                                         "Call timed out: server did not respond after %d milliseconds",
 121                                         cli->timeout);
 122                                 break;
 123                         case SMB_READ_EOF:
 124                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 125                                         "Call returned zero bytes (EOF)" );
 126                                 break;
 127                         case SMB_READ_ERROR:
 128                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 129                                         "Read error: %s", strerror(errno) );
 130                                 break;
 131                         case SMB_WRITE_ERROR:
 132                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 133                                         "Write error: %s", strerror(errno) );
 134                                 break;
 135                         case SMB_READ_BAD_SIG:
 136                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 137                                         "Server packet had invalid SMB signature!");
 138                                 break;
 139                         case SMB_NO_MEMORY:
 140                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 141                                         "Out of memory");
 142                                 break;
 143                         default:
 144                                 slprintf(cli_error_message, sizeof(cli_error_message) - 1,
 145                                         "Unknown error code %d\n", cli->smb_rw_error );
 146                                 break;
 147                 }
 148                 goto done;
 149         }
 150
 151         /* Case #1: RAP error */
 152         if (cli->rap_error) {
 153                 for (i = 0; rap_errmap[i].message != NULL; i++) {
 154                         if (rap_errmap[i].err == cli->rap_error) {
 155                                 return rap_errmap[i].message;
 156                         }
 157                 }
 158
 159                 slprintf(cli_error_message, sizeof(cli_error_message) - 1, "RAP code %d",
 160                         cli->rap_error);
 161
 162                 goto done;
 163         }
 164
 165         /* Case #2: 32-bit NT errors */
 166         if (flgs2 & FLAGS2_32_BIT_ERROR_CODES) {
 167                 NTSTATUS status = NT_STATUS(IVAL(cli->inbuf,smb_rcls));
 168
 169                 return nt_errstr(status);
 170         }
 171
 172         cli_dos_error(cli, &errclass, &errnum);
 173
 174         /* Case #3: SMB error */
 175
 176         return cli_smb_errstr(cli);
 177
 178  done:
 179         result = talloc_strdup(talloc_tos(), cli_error_message);
 180         SMB_ASSERT(result);
 181         return result;
 182 }
 183
 184
 185 /****************************************************************************
 186  Return the 32-bit NT status code from the last packet.
 187 ****************************************************************************/
 188
 189 NTSTATUS cli_nt_error(struct cli_state *cli)
 190 {
 191         int flgs2 = SVAL(cli->inbuf,smb_flg2);
 192
 193         /* Deal with socket errors first. */
 194         if (cli->fd == -1 && cli->smb_rw_error) {
 195                 return cli_smb_rw_error_to_ntstatus(cli);
 196         }
 197
 198         if (!(flgs2 & FLAGS2_32_BIT_ERROR_CODES)) {
 199                 int e_class  = CVAL(cli->inbuf,smb_rcls);
 200                 int code  = SVAL(cli->inbuf,smb_err);
 201                 return dos_to_ntstatus(e_class, code);
 202         }
 203
 204         return NT_STATUS(IVAL(cli->inbuf,smb_rcls));
 205 }
 206
 207
 208 /****************************************************************************
 209  Return the DOS error from the last packet - an error class and an error
 210  code.
 211 ****************************************************************************/
 212
 213 void cli_dos_error(struct cli_state *cli, uint8 *eclass, uint32 *ecode)
 214 {
 215         int  flgs2;
 216
 217         if(!cli->initialised) {
 218                 return;
 219         }
 220
 221         /* Deal with socket errors first. */
 222         if (cli->fd == -1 && cli->smb_rw_error) {
 223                 NTSTATUS status = cli_smb_rw_error_to_ntstatus(cli);
 224                 ntstatus_to_dos( status, eclass, ecode);
 225                 return;
 226         }
 227
 228         flgs2 = SVAL(cli->inbuf,smb_flg2);
 229
 230         if (flgs2 & FLAGS2_32_BIT_ERROR_CODES) {
 231                 NTSTATUS ntstatus = NT_STATUS(IVAL(cli->inbuf, smb_rcls));
 232                 ntstatus_to_dos(ntstatus, eclass, ecode);
 233                 return;
 234         }
 235
 236         *eclass  = CVAL(cli->inbuf,smb_rcls);
 237         *ecode  = SVAL(cli->inbuf,smb_err);
 238 }
 239
 240
 241 /* Return a UNIX errno appropriate for the error received in the last
 242    packet. */
 243
 244 int cli_errno(struct cli_state *cli)
 245 {
 246         NTSTATUS status;
 247
 248         if (cli_is_nt_error(cli)) {
 249                 status = cli_nt_error(cli);
 250                 return map_errno_from_nt_status(status);
 251         }
 252
 253         if (cli_is_dos_error(cli)) {
 254                 uint8 eclass;
 255                 uint32 ecode;
 256
 257                 cli_dos_error(cli, &eclass, &ecode);
 258                 status = dos_to_ntstatus(eclass, ecode);
 259                 return map_errno_from_nt_status(status);
 260         }
 261
 262         /*
 263          * Yuck!  A special case for this Vista error.  Since its high-order
 264          * byte isn't 0xc0, it doesn't match cli_is_nt_error() above.
 265          */
 266         status = cli_nt_error(cli);
 267         if (NT_STATUS_V(status) == NT_STATUS_V(NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
 268             return EACCES;
 269         }
 270
 271         /* for other cases */
 272         return EINVAL;
 273 }
 274
 275 /* Return true if the last packet was in error */
 276
 277 bool cli_is_error(struct cli_state *cli)
 278 {
 279         uint32 flgs2 = SVAL(cli->inbuf,smb_flg2), rcls = 0;
 280
 281         /* A socket error is always an error. */
 282         if (cli->fd == -1 && cli->smb_rw_error != 0) {
 283                 return True;
 284         }
 285
 286         if (flgs2 & FLAGS2_32_BIT_ERROR_CODES) {
 287                 /* Return error is error bits are set */
 288                 rcls = IVAL(cli->inbuf, smb_rcls);
 289                 return (rcls & 0xF0000000) == 0xC0000000;
 290         }
 291
 292         /* Return error if error class in non-zero */
 293
 294         rcls = CVAL(cli->inbuf, smb_rcls);
 295         return rcls != 0;
 296 }
 297
 298 /* Return true if the last error was an NT error */
 299
 300 bool cli_is_nt_error(struct cli_state *cli)
 301 {
 302         uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
 303
 304         /* A socket error is always an NT error. */
 305         if (cli->fd == -1 && cli->smb_rw_error != 0) {
 306                 return True;
 307         }
 308
 309         return cli_is_error(cli) && (flgs2 & FLAGS2_32_BIT_ERROR_CODES);
 310 }
 311
 312 /* Return true if the last error was a DOS error */
 313
 314 bool cli_is_dos_error(struct cli_state *cli)
 315 {
 316         uint32 flgs2 = SVAL(cli->inbuf,smb_flg2);
 317
 318         /* A socket error is always a DOS error. */
 319         if (cli->fd == -1 && cli->smb_rw_error != 0) {
 320                 return True;
 321         }
 322
 323         return cli_is_error(cli) && !(flgs2 & FLAGS2_32_BIT_ERROR_CODES);
 324 }
 325
 326 bool cli_state_is_connected(struct cli_state *cli)
 327 {
 328         if (cli == NULL) {
 329                 return false;
 330         }
 331
 332         if (!cli->initialised) {
 333                 return false;
 334         }
 335
 336         if (cli->fd == -1) {
 337                 return false;
 338         }
 339
 340         return true;
 341 }
 342