source4/librpc/rpc/pyrpc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
   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 3 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, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include <Python.h>
  22 #include "librpc/rpc/pyrpc.h"
  23 #include "librpc/rpc/dcerpc.h"
  24 #include "lib/events/events.h"
  25
  26 static PyObject *py_iface_server_name(PyObject *obj, void *closure)
  27 {
  28         const char *server_name;
  29         dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
  30
  31         server_name = dcerpc_server_name(iface->pipe);
  32         if (server_name == NULL)
  33                 return Py_None;
  34
  35         return PyString_FromString(server_name);
  36 }
  37
  38 static PyGetSetDef dcerpc_interface_getsetters[] = {
  39         { discard_const_p(char, "server_name"), py_iface_server_name, NULL },
  40         { NULL }
  41 };
  42
  43 static PyObject *py_iface_request(PyObject *self, PyObject *args, PyObject *kwargs)
  44 {
  45         dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
  46         int opnum;
  47         DATA_BLOB data_in, data_out;
  48         NTSTATUS status;
  49         char *in_data;
  50         int in_length;
  51         PyObject *ret;
  52         char *object;
  53         TALLOC_CTX *mem_ctx = talloc_new(NULL);
  54         const char *kwnames[] = { "opnum", "data", "object", NULL };
  55
  56         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "is#|s:request",
  57                 discard_const_p(char *, kwnames), &opnum, &in_data, &in_length, &object)) {
  58                 return NULL;
  59         }
  60
  61         data_in.data = talloc_strndup(mem_ctx, in_data, in_length);
  62         data_in.length = in_length;
  63
  64         status = dcerpc_request(iface->pipe, NULL /* FIXME: object GUID */,
  65                                 opnum, false, mem_ctx, &data_in, &data_out);
  66
  67         if (NT_STATUS_IS_ERR(status)) {
  68                 /* FIXME: Set more appropriate error */
  69                 PyErr_SetString(PyExc_RuntimeError, "Unable to connect");
  70                 talloc_free(mem_ctx);
  71                 return NULL;
  72         }
  73
  74         ret = PyString_FromStringAndSize((char *)data_out.data, data_out.length);
  75
  76         talloc_free(mem_ctx);
  77         return ret;
  78 }
  79
  80 static PyMethodDef dcerpc_interface_methods[] = {
  81         { "request", (PyCFunction)py_iface_request, METH_VARARGS|METH_KEYWORDS, "S.request(opnum, data) -> data\nMake a raw request" },
  82         { NULL, NULL, 0, NULL },
  83 };
  84
  85
  86 static void dcerpc_interface_dealloc(PyObject* self)
  87 {
  88         dcerpc_InterfaceObject *interface = (dcerpc_InterfaceObject *)self;
  89         talloc_free(interface->pipe);
  90         PyObject_Del(self);
  91 }
  92
  93 static PyObject *dcerpc_interface_new(PyTypeObject *self, PyObject *args, PyObject *kwargs)
  94 {
  95         dcerpc_InterfaceObject *ret;
  96         const char *binding_string;
  97         struct cli_credentials *credentials;
  98         struct loadparm_context *lp_ctx = NULL;
  99         PyObject *py_lp_ctx = Py_None, *py_credentials = Py_None;
 100         TALLOC_CTX *mem_ctx = NULL;
 101         struct event_context *event_ctx;
 102         NTSTATUS status;
 103
 104         PyObject *syntax;
 105         const char *kwnames[] = {
 106                 "binding", "syntax", "lp_ctx", "credentials", NULL
 107         };
 108         extern struct loadparm_context *lp_from_py_object(PyObject *py_obj);
 109         extern struct cli_credentials *cli_credentials_from_py_object(PyObject *py_obj);
 110
 111         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|OO:connect", discard_const_p(char *, kwnames), &binding_string, &syntax, &py_lp_ctx, &py_credentials)) {
 112                 return NULL;
 113         }
 114
 115         lp_ctx = lp_from_py_object(py_lp_ctx);
 116         if (lp_ctx == NULL) {
 117                 PyErr_SetString(PyExc_TypeError, "Expected loadparm context");
 118                 return NULL;
 119         }
 120
 121         credentials = cli_credentials_from_py_object(py_credentials);
 122         if (credentials == NULL) {
 123                 PyErr_SetString(PyExc_TypeError, "Expected credentials");
 124                 return NULL;
 125         }
 126         ret = PyObject_New(dcerpc_InterfaceObject, &dcerpc_InterfaceType);
 127
 128         event_ctx = event_context_init(mem_ctx);
 129
 130         status = dcerpc_pipe_connect(NULL, &ret->pipe, binding_string,
 131                      NULL, credentials, event_ctx, lp_ctx);
 132         if (NT_STATUS_IS_ERR(status)) {
 133                 PyErr_SetString(PyExc_RuntimeError, nt_errstr(status));
 134                 talloc_free(mem_ctx);
 135                 return NULL;
 136         }
 137
 138         ret->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
 139         return (PyObject *)ret;
 140 }
 141
 142 PyTypeObject dcerpc_InterfaceType = {
 143         PyObject_HEAD_INIT(NULL) 0,
 144         .tp_name = "dcerpc.ClientConnection",
 145         .tp_basicsize = sizeof(dcerpc_InterfaceObject),
 146         .tp_dealloc = dcerpc_interface_dealloc,
 147         .tp_getset = dcerpc_interface_getsetters,
 148         .tp_methods = dcerpc_interface_methods,
 149         .tp_doc = "ClientConnection(binding, syntax, lp_ctx=None, credentials=None) -> connection\n"
 150 "\n"
 151 "binding should be a DCE/RPC binding string (for example: ncacn_ip_tcp:127.0.0.1)\n"
 152 "syntax should be a tuple with a GUID and version number of an interface\n"
 153 "lp_ctx should be a path to a smb.conf file or a param.LoadParm object\n"
 154 "credentials should be a credentials.Credentials object.\n\n",
 155         .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
 156         .tp_new = dcerpc_interface_new,
 157 };
 158
 159 void initbase(void)
 160 {
 161         PyObject *m;
 162
 163         if (PyType_Ready(&dcerpc_InterfaceType) < 0)
 164                 return;
 165
 166         m = Py_InitModule3("base", NULL, "DCE/RPC protocol implementation");
 167         if (m == NULL)
 168                 return;
 169
 170         Py_INCREF((PyObject *)&dcerpc_InterfaceType);
 171         PyModule_AddObject(m, "ClientConnection", (PyObject *)&dcerpc_InterfaceType);
 172 }