source/python/py_conv.c

   1 /*
   2    Python wrappers for DCERPC/SMB client routines.
   3
   4    Copyright (C) Tim Potter, 2002
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22 #include "Python.h"
  23 #include "py_conv.h"
  24
  25 /* Helper for rpcstr_pull() function */
  26
  27 static void fstr_pull(fstring str, UNISTR *uni)
  28 {
  29         rpcstr_pull(str, uni->buffer, sizeof(fstring), -1, STR_TERMINATE);
  30 }
  31
  32 /* Convert a structure to a Python dict */
  33
  34 PyObject *from_struct(void *s, struct pyconv *conv)
  35 {
  36         PyObject *obj, *item;
  37         int i;
  38
  39         obj = PyDict_New();
  40
  41         for (i = 0; conv[i].name; i++) {
  42                 switch (conv[i].type) {
  43                 case PY_UNISTR: {
  44                         UNISTR *u = (UNISTR *)((char *)s + conv[i].offset);
  45                         fstring s = "";
  46
  47                         if (u->buffer)
  48                                 fstr_pull(s, u);
  49
  50                         item = PyString_FromString(s);
  51                         PyDict_SetItemString(obj, conv[i].name, item);
  52
  53                         break;
  54                 }
  55                 case PY_UINT32: {
  56                         uint32 *u = (uint32 *)((char *)s + conv[i].offset);
  57
  58                         item = PyInt_FromLong(*u);
  59                         PyDict_SetItemString(obj, conv[i].name, item);
  60
  61                         break;
  62                 }
  63                 case PY_UINT16: {
  64                         uint16 *u = (uint16 *)((char *)s + conv[i].offset);
  65
  66                         item = PyInt_FromLong(*u);
  67                         PyDict_SetItemString(obj, conv[i].name, item);
  68
  69                         break;
  70                 }
  71                 default:
  72                         break;
  73                 }
  74         }
  75
  76         return obj;
  77 }
  78
  79 /* Convert a Python dict to a structure */
  80
  81 BOOL to_struct(void *s, PyObject *dict, struct pyconv *conv)
  82 {
  83         PyObject *visited, *key, *value;
  84         BOOL result = False;
  85         int i;
  86
  87         visited = PyDict_New();
  88
  89         for (i = 0; conv[i].name; i++) {
  90                 PyObject *obj;
  91
  92                 obj = PyDict_GetItemString(dict, conv[i].name);
  93
  94                 if (!obj)
  95                         goto done;
  96
  97                 switch (conv[i].type) {
  98                 case PY_UNISTR: {
  99                         UNISTR *u = (UNISTR *)((char *)s + conv[i].offset);
 100                         char *s = "";
 101
 102                         if (!PyString_Check(obj))
 103                                 goto done;
 104
 105                         s = PyString_AsString(obj);
 106                         init_unistr(u, s);
 107
 108                         break;
 109                 }
 110                 case PY_UINT32: {
 111                         uint32 *u = (uint32 *)((char *)s + conv[i].offset);
 112
 113                         if (!PyInt_Check(obj))
 114                                 goto done;
 115
 116                         *u = PyInt_AsLong(obj);
 117
 118                         break;
 119                 }
 120                 case PY_UINT16: {
 121                         uint16 *u = (uint16 *)((char *)s + conv[i].offset);
 122
 123                         if (!PyInt_Check(obj))
 124                                 goto done;
 125
 126                         *u = PyInt_AsLong(obj);
 127                         break;
 128                 }
 129                 default:
 130                         break;
 131                 }
 132
 133                 /* Mark as visited */
 134
 135                 PyDict_SetItemString(visited, conv[i].name,
 136                                      PyInt_FromLong(1));
 137         }
 138
 139         /* Iterate over each item in the input dictionary and see if it was
 140            visited.  If it wasn't then the user has added some extra crap
 141            to the dictionary. */
 142
 143         i = 0;
 144
 145         while (PyDict_Next(dict, &i, &key, &value)) {
 146                 if (!PyDict_GetItem(visited, key))
 147                         goto done;
 148         }
 149
 150         result = True;
 151
 152 done:
 153         /* We must decrement the reference count here or the visited
 154            dictionary will not be freed. */
 155
 156         Py_DECREF(visited);
 157
 158         return result;
 159 }