Line data    Source code

       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             :    server specific string routines
       4             :    Copyright (C) Andrew Tridgell 2001
       5             :    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
       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             : #include "includes.h"
      22             : #include "smbd/smbd.h"
      23             : #include "smbd/globals.h"
      24             : #include "lib/util/string_wrappers.h"
      25             : 
      26             : /* Make sure we can't write a string past the end of the buffer */
      27             : 
      28     1037518 : NTSTATUS srvstr_push_fn(const char *base_ptr, uint16_t smb_flags2, void *dest,
      29             :                       const char *src, int dest_len, int flags, size_t *ret_len)
      30             : {
      31        1182 :         size_t len;
      32        1182 :         int saved_errno;
      33        1182 :         NTSTATUS status;
      34             : 
      35     1037518 :         if (dest_len < 0) {
      36           0 :                 return NT_STATUS_INVALID_PARAMETER;
      37             :         }
      38             : 
      39     1037518 :         saved_errno = errno;
      40     1037518 :         errno = 0;
      41             : 
      42             :         /* 'normal' push into size-specified buffer */
      43     1037518 :         len = push_string_base(base_ptr, smb_flags2, dest, src,
      44             :                                 dest_len, flags);
      45             : 
      46     1037518 :         if (errno != 0) {
      47             :                 /*
      48             :                  * Special case E2BIG, EILSEQ, EINVAL
      49             :                  * as they mean conversion errors here,
      50             :                  * but we don't generically map them as
      51             :                  * they can mean different things in
      52             :                  * generic filesystem calls (such as
      53             :                  * read xattrs).
      54             :                  */
      55          80 :                 if (errno == E2BIG || errno == EILSEQ || errno == EINVAL) {
      56          80 :                         status = NT_STATUS_ILLEGAL_CHARACTER;
      57             :                 } else {
      58           0 :                         status = map_nt_error_from_unix_common(errno);
      59             :                         /*
      60             :                          * Paranoia - Filter out STATUS_MORE_ENTRIES.
      61             :                          * I don't think we can get this but it has a
      62             :                          * specific meaning to the client.
      63             :                          */
      64           0 :                         if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
      65           0 :                                 status = NT_STATUS_UNSUCCESSFUL;
      66             :                         }
      67             :                 }
      68          80 :                 DEBUG(10,("character conversion failure "
      69             :                         "on string (%s) (%s)\n",
      70             :                         src, strerror(errno)));
      71             :         } else {
      72             :                 /* Success - restore untouched errno. */
      73     1037438 :                 errno = saved_errno;
      74     1037438 :                 *ret_len = len;
      75     1037438 :                 status = NT_STATUS_OK;
      76             :         }
      77     1037518 :         return status;
      78             : }