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 str = "";
  46
  47                         if (u->buffer)
  48                                 fstr_pull(str, u);
  49
  50                         item = PyString_FromString(str);
  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                 case PY_STRING: {
  72                         char *str = (char *)s + conv[i].offset;
  73
  74                         item = PyString_FromString(str);
  75                         PyDict_SetItemString(obj, conv[i].name, item);
  76
  77                         break;
  78                 }
  79                 case PY_UID: {
  80                         uid_t *uid = (uid_t *)((char *)s + conv[i].offset);
  81
  82                         item = PyInt_FromLong(*uid);
  83                         PyDict_SetItemString(obj, conv[i].name, item);
  84
  85                         break;
  86                 }
  87                 case PY_GID: {
  88                         gid_t *gid = (gid_t *)((char *)s + conv[i].offset);
  89
  90                         item = PyInt_FromLong(*gid);
  91                         PyDict_SetItemString(obj, conv[i].name, item);
  92
  93                         break;
  94                 }
  95                 default:
  96
  97                         break;
  98                 }
  99         }
 100
 101         return obj;
 102 }
 103
 104 /* Convert a Python dict to a structure */
 105
 106 BOOL to_struct(void *s, PyObject *dict, struct pyconv *conv)
 107 {
 108         PyObject *visited, *key, *value;
 109         BOOL result = False;
 110         int i;
 111
 112         visited = PyDict_New();
 113
 114         for (i = 0; conv[i].name; i++) {
 115                 PyObject *obj;
 116
 117                 obj = PyDict_GetItemString(dict, conv[i].name);
 118
 119                 if (!obj)
 120                         goto done;
 121
 122                 switch (conv[i].type) {
 123                 case PY_UNISTR: {
 124                         UNISTR *u = (UNISTR *)((char *)s + conv[i].offset);
 125                         char *str = "";
 126
 127                         if (!PyString_Check(obj))
 128                                 goto done;
 129
 130                         str = PyString_AsString(obj);
 131                         init_unistr(u, str);
 132
 133                         break;
 134                 }
 135                 case PY_UINT32: {
 136                         uint32 *u = (uint32 *)((char *)s + conv[i].offset);
 137
 138                         if (!PyInt_Check(obj))
 139                                 goto done;
 140
 141                         *u = PyInt_AsLong(obj);
 142
 143                         break;
 144                 }
 145                 case PY_UINT16: {
 146                         uint16 *u = (uint16 *)((char *)s + conv[i].offset);
 147
 148                         if (!PyInt_Check(obj))
 149                                 goto done;
 150
 151                         *u = PyInt_AsLong(obj);
 152                         break;
 153                 }
 154                 default:
 155                         break;
 156                 }
 157
 158                 /* Mark as visited */
 159
 160                 PyDict_SetItemString(visited, conv[i].name,
 161                                      PyInt_FromLong(1));
 162         }
 163
 164         /* Iterate over each item in the input dictionary and see if it was
 165            visited.  If it wasn't then the user has added some extra crap
 166            to the dictionary. */
 167
 168         i = 0;
 169
 170         while (PyDict_Next(dict, &i, &key, &value)) {
 171                 if (!PyDict_GetItem(visited, key))
 172                         goto done;
 173         }
 174
 175         result = True;
 176
 177 done:
 178         /* We must decrement the reference count here or the visited
 179            dictionary will not be freed. */
 180
 181         Py_DECREF(visited);
 182
 183         return result;
 184 }
 185
 186 /* Convert a NULL terminated list of NULL terminated unicode strings
 187    to a list of (char *) strings */
 188
 189 PyObject *from_unistr_list(uint16 *dependentfiles)
 190 {
 191         PyObject *list;
 192         int offset = 0;
 193
 194         list = PyList_New(0);
 195
 196         while (*(dependentfiles + offset) != 0) {
 197                 fstring name;
 198                 int len;
 199
 200                 len = rpcstr_pull(name, dependentfiles + offset,
 201                                   sizeof(fstring), -1, STR_TERMINATE);
 202
 203                 offset += len / 2;
 204                 PyList_Append(list, PyString_FromString(name));
 205         }
 206
 207         return list;
 208 }