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 #include "../libcli/smb/smbXcli_base.h"
  25
  26 /***************************************************************************
  27  Return an error message - either an NT error, SMB error or a RAP error.
  28  Note some of the NT errors are actually warnings or "informational" errors
  29  in which case they can be safely ignored.
  30 ****************************************************************************/
  31
  32 const char *cli_errstr(struct cli_state *cli)
  33 {
  34         fstring cli_error_message;
  35         char *result;
  36
  37         if (!cli->initialised) {
  38                 fstrcpy(cli_error_message, "[Programmer's error] cli_errstr called on uninitialized cli_stat struct!\n");
  39                 goto done;
  40         }
  41
  42         /* Case #1: RAP error */
  43         if (cli->rap_error) {
  44                 strlcpy(cli_error_message, win_errstr(W_ERROR(cli->rap_error)),
  45                         sizeof(cli_error_message));
  46                 goto done;
  47         }
  48
  49         if (!cli_state_is_connected(cli) && NT_STATUS_IS_OK(cli->raw_status)) {
  50                 return nt_errstr(NT_STATUS_CONNECTION_DISCONNECTED);
  51         }
  52
  53         return nt_errstr(cli->raw_status);
  54  done:
  55         result = talloc_strdup(talloc_tos(), cli_error_message);
  56         SMB_ASSERT(result);
  57         return result;
  58 }
  59
  60
  61 /****************************************************************************
  62  Return the 32-bit NT status code from the last packet.
  63 ****************************************************************************/
  64
  65 NTSTATUS cli_nt_error(struct cli_state *cli)
  66 {
  67         /* Deal with socket errors first. */
  68         if (!cli_state_is_connected(cli)) {
  69                 return NT_STATUS_CONNECTION_DISCONNECTED;
  70         }
  71
  72         if (NT_STATUS_IS_DOS(cli->raw_status)) {
  73                 int e_class = NT_STATUS_DOS_CLASS(cli->raw_status);
  74                 int code = NT_STATUS_DOS_CODE(cli->raw_status);
  75                 return dos_to_ntstatus(e_class, code);
  76         }
  77
  78         return cli->raw_status;
  79 }
  80
  81
  82 /****************************************************************************
  83  Return the DOS error from the last packet - an error class and an error
  84  code.
  85 ****************************************************************************/
  86
  87 void cli_dos_error(struct cli_state *cli, uint8_t *eclass, uint32_t *ecode)
  88 {
  89         if (!cli_state_is_connected(cli)) {
  90                 *eclass = ERRDOS;
  91                 *ecode = ERRnotconnected;
  92                 return;
  93         }
  94
  95         if (!NT_STATUS_IS_DOS(cli->raw_status)) {
  96                 ntstatus_to_dos(cli->raw_status, eclass, ecode);
  97                 return;
  98         }
  99
 100         *eclass = NT_STATUS_DOS_CLASS(cli->raw_status);
 101         *ecode = NT_STATUS_DOS_CODE(cli->raw_status);
 102 }
 103
 104
 105 /* Return a UNIX errno appropriate for the error received in the last
 106    packet. */
 107
 108 int cli_errno(struct cli_state *cli)
 109 {
 110         NTSTATUS status;
 111
 112         if (cli_is_nt_error(cli)) {
 113                 status = cli_nt_error(cli);
 114                 return map_errno_from_nt_status(status);
 115         }
 116
 117         if (cli_is_dos_error(cli)) {
 118                 uint8_t eclass;
 119                 uint32_t ecode;
 120
 121                 cli_dos_error(cli, &eclass, &ecode);
 122                 status = dos_to_ntstatus(eclass, ecode);
 123                 return map_errno_from_nt_status(status);
 124         }
 125
 126         /*
 127          * Yuck!  A special case for this Vista error.  Since its high-order
 128          * byte isn't 0xc0, it doesn't match cli_is_nt_error() above.
 129          */
 130         status = cli_nt_error(cli);
 131         if (NT_STATUS_V(status) == NT_STATUS_V(NT_STATUS_INACCESSIBLE_SYSTEM_SHORTCUT)) {
 132             return EACCES;
 133         }
 134
 135         /* for other cases */
 136         return EINVAL;
 137 }
 138
 139 /* Return true if the last packet was in error */
 140
 141 bool cli_is_error(struct cli_state *cli)
 142 {
 143         /* A socket error is always an error. */
 144         if (!cli_state_is_connected(cli)) {
 145                 return true;
 146         }
 147
 148         if (NT_STATUS_IS_DOS(cli->raw_status)) {
 149                 /* Return error if error class in non-zero */
 150                 uint8_t rcls = NT_STATUS_DOS_CLASS(cli->raw_status);
 151                 return rcls != 0;
 152         }
 153
 154         return NT_STATUS_IS_ERR(cli->raw_status);
 155 }
 156
 157 /* Return true if the last error was an NT error */
 158
 159 bool cli_is_nt_error(struct cli_state *cli)
 160 {
 161         /* A socket error is always an NT error. */
 162         if (!cli_state_is_connected(cli)) {
 163                 return true;
 164         }
 165
 166         return cli_is_error(cli) && !NT_STATUS_IS_DOS(cli->raw_status);
 167 }
 168
 169 /* Return true if the last error was a DOS error */
 170
 171 bool cli_is_dos_error(struct cli_state *cli)
 172 {
 173         /* A socket error is always a DOS error. */
 174         if (!cli_state_is_connected(cli)) {
 175                 return true;
 176         }
 177
 178         return cli_is_error(cli) && NT_STATUS_IS_DOS(cli->raw_status);
 179 }
 180
 181 bool cli_state_is_connected(struct cli_state *cli)
 182 {
 183         if (cli == NULL) {
 184                 return false;
 185         }
 186
 187         if (!cli->initialised) {
 188                 return false;
 189         }
 190
 191         return smbXcli_conn_is_connected(cli->conn);
 192 }