source4/libnet/py_net.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008-2010
   5    Copyright (C) Kamen Mazdrashki <kamen.mazdrashki@postpath.com> 2009
   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 "lib/ldb/pyldb.h"
  22 #include "includes.h"
  23 #include "libnet.h"
  24 #include "auth/credentials/pycredentials.h"
  25 #include "libcli/security/security.h"
  26 #include "lib/events/events.h"
  27 #include "param/pyparam.h"
  28 #include "auth/gensec/gensec.h"
  29 #include "librpc/rpc/pyrpc_util.h"
  30 #include "libcli/finddc.h"
  31 #include "libcli/resolve/resolve.h"
  32
  33 typedef struct {
  34         PyObject_HEAD
  35         TALLOC_CTX *mem_ctx;
  36         struct libnet_context *libnet_ctx;
  37         struct tevent_context *ev;
  38 } py_net_Object;
  39
  40 static PyObject *py_net_join(py_net_Object *self, PyObject *args, PyObject *kwargs)
  41 {
  42         struct libnet_Join r;
  43         NTSTATUS status;
  44         PyObject *result;
  45         TALLOC_CTX *mem_ctx;
  46         const char *kwnames[] = { "domain_name", "netbios_name", "join_type", "level", NULL };
  47
  48         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssii:Join", discard_const_p(char *, kwnames),
  49                                          &r.in.domain_name, &r.in.netbios_name,
  50                                          &r.in.join_type, &r.in.level))
  51                 return NULL;
  52
  53         mem_ctx = talloc_new(self->mem_ctx);
  54         if (mem_ctx == NULL) {
  55                 PyErr_NoMemory();
  56                 return NULL;
  57         }
  58
  59         status = libnet_Join(self->libnet_ctx, mem_ctx, &r);
  60         if (NT_STATUS_IS_ERR(status)) {
  61                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
  62                 talloc_free(mem_ctx);
  63                 return NULL;
  64         }
  65
  66         result = Py_BuildValue("sss", r.out.join_password,
  67                                dom_sid_string(mem_ctx, r.out.domain_sid),
  68                                r.out.domain_name);
  69
  70         talloc_free(mem_ctx);
  71
  72         return result;
  73 }
  74
  75 static const char py_net_join_doc[] = "join(domain_name, netbios_name, join_type, level) -> (join_password, domain_sid, domain_name)\n\n" \
  76 "Join the domain with the specified name.";
  77
  78 static PyObject *py_net_set_password(py_net_Object *self, PyObject *args, PyObject *kwargs)
  79 {
  80         union libnet_SetPassword r;
  81         NTSTATUS status;
  82         PyObject *py_creds;
  83         TALLOC_CTX *mem_ctx;
  84         struct tevent_context *ev;
  85         const char *kwnames[] = { "account_name", "domain_name", "newpassword", "credentials", NULL };
  86
  87         r.generic.level = LIBNET_SET_PASSWORD_GENERIC;
  88
  89         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sssO:set_password", discard_const_p(char *, kwnames),
  90                                          &r.generic.in.account_name, &r.generic.in.domain_name,
  91                                          &r.generic.in.newpassword, &py_creds)) {
  92                 return NULL;
  93         }
  94
  95         /* FIXME: we really need to get a context from the caller or we may end
  96          * up with 2 event contexts */
  97         ev = s4_event_context_init(NULL);
  98
  99         mem_ctx = talloc_new(ev);
 100         if (mem_ctx == NULL) {
 101                 PyErr_NoMemory();
 102                 return NULL;
 103         }
 104
 105         status = libnet_SetPassword(self->libnet_ctx, mem_ctx, &r);
 106         if (NT_STATUS_IS_ERR(status)) {
 107                 PyErr_SetString(PyExc_RuntimeError,
 108                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 109                 talloc_free(mem_ctx);
 110                 return NULL;
 111         }
 112
 113         talloc_free(mem_ctx);
 114
 115         Py_RETURN_NONE;
 116 }
 117
 118 static const char py_net_set_password_doc[] = "set_password(account_name, domain_name, newpassword) -> True\n\n" \
 119 "Set password for a user. You must supply credential with enough rights to do this.\n\n" \
 120 "Sample usage is:\n" \
 121 "net.set_password(account_name=<account_name>,\n" \
 122 "                domain_name=domain_name,\n" \
 123 "                newpassword=new_pass)\n";
 124
 125
 126 static PyObject *py_net_export_keytab(py_net_Object *self, PyObject *args, PyObject *kwargs)
 127 {
 128         struct libnet_export_keytab r;
 129         TALLOC_CTX *mem_ctx;
 130         const char *kwnames[] = { "keytab", NULL };
 131         NTSTATUS status;
 132
 133         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:export_keytab", discard_const_p(char *, kwnames),
 134                                          &r.in.keytab_name)) {
 135                 return NULL;
 136         }
 137
 138         mem_ctx = talloc_new(self->mem_ctx);
 139         if (mem_ctx == NULL) {
 140                 PyErr_NoMemory();
 141                 return NULL;
 142         }
 143
 144         status = libnet_export_keytab(self->libnet_ctx, mem_ctx, &r);
 145         if (NT_STATUS_IS_ERR(status)) {
 146                 PyErr_SetString(PyExc_RuntimeError,
 147                                 r.out.error_string?r.out.error_string:nt_errstr(status));
 148                 talloc_free(mem_ctx);
 149                 return NULL;
 150         }
 151
 152         talloc_free(mem_ctx);
 153
 154         Py_RETURN_NONE;
 155 }
 156
 157 static const char py_net_export_keytab_doc[] = "export_keytab(keytab, name)\n\n"
 158 "Export the DC keytab to a keytab file.";
 159
 160 static PyObject *py_net_time(py_net_Object *self, PyObject *args, PyObject *kwargs)
 161 {
 162         const char *kwnames[] = { "server_name", NULL };
 163         union libnet_RemoteTOD r;
 164         NTSTATUS status;
 165         TALLOC_CTX *mem_ctx;
 166         char timestr[64];
 167         PyObject *ret;
 168         struct tm *tm;
 169
 170         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s",
 171                 discard_const_p(char *, kwnames), &r.generic.in.server_name))
 172                 return NULL;
 173
 174         r.generic.level                 = LIBNET_REMOTE_TOD_GENERIC;
 175
 176         mem_ctx = talloc_new(NULL);
 177         if (mem_ctx == NULL) {
 178                 PyErr_NoMemory();
 179                 return NULL;
 180         }
 181
 182         status = libnet_RemoteTOD(self->libnet_ctx, mem_ctx, &r);
 183         if (!NT_STATUS_IS_OK(status)) {
 184                 PyErr_SetString(PyExc_RuntimeError,
 185                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 186                 talloc_free(mem_ctx);
 187                 return NULL;
 188         }
 189
 190         ZERO_STRUCT(timestr);
 191         tm = localtime(&r.generic.out.time);
 192         strftime(timestr, sizeof(timestr)-1, "%c %Z",tm);
 193
 194         ret = PyString_FromString(timestr);
 195
 196         talloc_free(mem_ctx);
 197
 198         return ret;
 199 }
 200
 201 static const char py_net_time_doc[] = "time(server_name) -> timestr\n"
 202 "Retrieve the remote time on a server";
 203
 204 static PyObject *py_net_user_create(py_net_Object *self, PyObject *args, PyObject *kwargs)
 205 {
 206         const char *kwnames[] = { "username", NULL };
 207         NTSTATUS status;
 208         TALLOC_CTX *mem_ctx;
 209         struct libnet_CreateUser r;
 210
 211         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 212                                                                          &r.in.user_name))
 213                 return NULL;
 214
 215         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 216
 217         mem_ctx = talloc_new(NULL);
 218         if (mem_ctx == NULL) {
 219                 PyErr_NoMemory();
 220                 return NULL;
 221         }
 222
 223         status = libnet_CreateUser(self->libnet_ctx, mem_ctx, &r);
 224         if (!NT_STATUS_IS_OK(status)) {
 225                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 226                 talloc_free(mem_ctx);
 227                 return NULL;
 228         }
 229
 230         talloc_free(mem_ctx);
 231
 232         Py_RETURN_NONE;
 233 }
 234
 235 static const char py_net_create_user_doc[] = "create_user(username)\n"
 236 "Create a new user.";
 237
 238 static PyObject *py_net_user_delete(py_net_Object *self, PyObject *args, PyObject *kwargs)
 239 {
 240         const char *kwnames[] = { "username", NULL };
 241         NTSTATUS status;
 242         TALLOC_CTX *mem_ctx;
 243         struct libnet_DeleteUser r;
 244
 245         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 246                                                                          &r.in.user_name))
 247                 return NULL;
 248
 249         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 250
 251         mem_ctx = talloc_new(NULL);
 252         if (mem_ctx == NULL) {
 253                 PyErr_NoMemory();
 254                 return NULL;
 255         }
 256
 257         status = libnet_DeleteUser(self->libnet_ctx, mem_ctx, &r);
 258         if (!NT_STATUS_IS_OK(status)) {
 259                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 260                 talloc_free(mem_ctx);
 261                 return NULL;
 262         }
 263
 264         talloc_free(mem_ctx);
 265
 266         Py_RETURN_NONE;
 267 }
 268
 269 static const char py_net_delete_user_doc[] = "delete_user(username)\n"
 270 "Delete a user.";
 271
 272 static PyObject *py_dom_sid_FromSid(struct dom_sid *sid)
 273 {
 274         PyObject *mod_security, *dom_sid_Type;
 275
 276         mod_security = PyImport_ImportModule("samba.dcerpc.security");
 277         if (mod_security == NULL)
 278                 return NULL;
 279
 280         dom_sid_Type = PyObject_GetAttrString(mod_security, "dom_sid");
 281         if (dom_sid_Type == NULL)
 282                 return NULL;
 283
 284         return py_talloc_reference((PyTypeObject *)dom_sid_Type, sid);
 285 }
 286
 287 static PyObject *py_net_vampire(py_net_Object *self, PyObject *args, PyObject *kwargs)
 288 {
 289         const char *kwnames[] = { "domain", "target_dir", NULL };
 290         NTSTATUS status;
 291         TALLOC_CTX *mem_ctx;
 292         PyObject *ret;
 293         struct libnet_Vampire r;
 294
 295         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z", discard_const_p(char *, kwnames),
 296                                          &r.in.domain_name, &r.in.targetdir)) {
 297                 return NULL;
 298         }
 299
 300         r.in.netbios_name  = lpcfg_netbios_name(self->libnet_ctx->lp_ctx);
 301         r.out.error_string = NULL;
 302
 303         mem_ctx = talloc_new(NULL);
 304         if (mem_ctx == NULL) {
 305                 PyErr_NoMemory();
 306                 return NULL;
 307         }
 308
 309         status = libnet_Vampire(self->libnet_ctx, mem_ctx, &r);
 310
 311         if (!NT_STATUS_IS_OK(status)) {
 312                 PyErr_SetString(PyExc_RuntimeError,
 313                                 r.out.error_string ? r.out.error_string : nt_errstr(status));
 314                 talloc_free(mem_ctx);
 315                 return NULL;
 316         }
 317
 318         ret = Py_BuildValue("(sO)", r.out.domain_name, py_dom_sid_FromSid(r.out.domain_sid));
 319
 320         talloc_free(mem_ctx);
 321
 322         return ret;
 323 }
 324
 325 struct replicate_state {
 326         void *vampire_state;
 327         dcerpc_InterfaceObject *drs_pipe;
 328         struct libnet_BecomeDC_StoreChunk chunk;
 329         DATA_BLOB gensec_skey;
 330         struct libnet_BecomeDC_Partition partition;
 331         struct libnet_BecomeDC_Forest forest;
 332         struct libnet_BecomeDC_DestDSA dest_dsa;
 333 };
 334
 335 /*
 336   setup for replicate_chunk() calls
 337  */
 338 static PyObject *py_net_replicate_init(py_net_Object *self, PyObject *args, PyObject *kwargs)
 339 {
 340         const char *kwnames[] = { "samdb", "lp", "drspipe", NULL };
 341         PyObject *py_ldb, *py_lp, *py_drspipe;
 342         struct ldb_context *samdb;
 343         struct loadparm_context *lp;
 344         struct replicate_state *s;
 345         NTSTATUS status;
 346
 347         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OOO",
 348                                          discard_const_p(char *, kwnames),
 349                                          &py_ldb, &py_lp, &py_drspipe)) {
 350                 return NULL;
 351         }
 352
 353         s = talloc_zero(NULL, struct replicate_state);
 354         if (!s) return NULL;
 355
 356         lp = lpcfg_from_py_object(s, py_lp);
 357         if (lp == NULL) {
 358                 PyErr_SetString(PyExc_TypeError, "Expected lp object");
 359                 talloc_free(s);
 360                 return NULL;
 361         }
 362
 363         samdb = PyLdb_AsLdbContext(py_ldb);
 364         if (samdb == NULL) {
 365                 PyErr_SetString(PyExc_TypeError, "Expected ldb object");
 366                 talloc_free(s);
 367                 return NULL;
 368         }
 369
 370         s->drs_pipe = (dcerpc_InterfaceObject *)(py_drspipe);
 371
 372         s->vampire_state = libnet_vampire_replicate_init(s, samdb, lp);
 373         if (s->vampire_state == NULL) {
 374                 PyErr_SetString(PyExc_TypeError, "Failed to initialise vampire_state");
 375                 talloc_free(s);
 376                 return NULL;
 377         }
 378
 379         status = gensec_session_key(s->drs_pipe->pipe->conn->security_state.generic_state,
 380                                     &s->gensec_skey);
 381         if (!NT_STATUS_IS_OK(status)) {
 382                 PyErr_Format(PyExc_RuntimeError, "Unable to get session key from drspipe: %s",
 383                              nt_errstr(status));
 384                 talloc_free(s);
 385                 return NULL;
 386         }
 387
 388         s->forest.dns_name = lpcfg_dnsdomain(lp);
 389
 390         s->chunk.gensec_skey = &s->gensec_skey;
 391         s->chunk.partition = &s->partition;
 392         s->chunk.forest = &s->forest;
 393         s->chunk.dest_dsa = &s->dest_dsa;
 394
 395         return PyCObject_FromTallocPtr(s);
 396 }
 397
 398
 399 /*
 400   process one replication chunk
 401  */
 402 static PyObject *py_net_replicate_chunk(py_net_Object *self, PyObject *args, PyObject *kwargs)
 403 {
 404         const char *kwnames[] = { "state", "level", "ctr", "schema", NULL };
 405         PyObject *py_state, *py_ctr, *py_schema;
 406         struct replicate_state *s;
 407         unsigned level;
 408         NTSTATUS (*chunk_handler)(void *private_data, const struct libnet_BecomeDC_StoreChunk *c);
 409         NTSTATUS status;
 410
 411         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIO|O",
 412                                          discard_const_p(char *, kwnames),
 413                                          &py_state, &level, &py_ctr, &py_schema)) {
 414                 return NULL;
 415         }
 416
 417         s = talloc_get_type(PyCObject_AsVoidPtr(py_state), struct replicate_state);
 418         if (!s) {
 419                 PyErr_SetString(PyExc_TypeError, "Expected replication_state");
 420                 return NULL;
 421         }
 422
 423         switch (level) {
 424         case 1:
 425                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr1")) {
 426                         return NULL;
 427                 }
 428                 s->chunk.ctr1                         = py_talloc_get_ptr(py_ctr);
 429                 s->partition.nc                       = *s->chunk.ctr1->naming_context;
 430                 s->partition.more_data                = s->chunk.ctr1->more_data;
 431                 s->partition.source_dsa_guid          = s->chunk.ctr1->source_dsa_guid;
 432                 s->partition.source_dsa_invocation_id = s->chunk.ctr1->source_dsa_invocation_id;
 433                 s->partition.highwatermark            = s->chunk.ctr1->new_highwatermark;
 434                 break;
 435         case 6:
 436                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr6")) {
 437                         return NULL;
 438                 }
 439                 s->chunk.ctr6                         = py_talloc_get_ptr(py_ctr);
 440                 s->partition.nc                       = *s->chunk.ctr6->naming_context;
 441                 s->partition.more_data                = s->chunk.ctr6->more_data;
 442                 s->partition.source_dsa_guid          = s->chunk.ctr6->source_dsa_guid;
 443                 s->partition.source_dsa_invocation_id = s->chunk.ctr6->source_dsa_invocation_id;
 444                 s->partition.highwatermark            = s->chunk.ctr6->new_highwatermark;
 445                 break;
 446         default:
 447                 PyErr_Format(PyExc_TypeError, "Bad level %u in replicate_chunk", level);
 448                 return NULL;
 449         }
 450
 451         chunk_handler = libnet_vampire_cb_store_chunk;
 452         if (py_schema) {
 453                 if (!PyBool_Check(py_schema)) {
 454                         PyErr_SetString(PyExc_TypeError, "Expected boolean schema");
 455                         return NULL;
 456                 }
 457                 if (py_schema == Py_True) {
 458                         chunk_handler = libnet_vampire_cb_schema_chunk;
 459                 }
 460         }
 461
 462         s->chunk.ctr_level = level;
 463
 464         status = chunk_handler(s->vampire_state, &s->chunk);
 465         if (!NT_STATUS_IS_OK(status)) {
 466                 PyErr_Format(PyExc_TypeError, "Failed to process chunk: %s", nt_errstr(status));
 467                 return NULL;
 468         }
 469
 470         Py_RETURN_NONE;
 471 }
 472
 473
 474 /*
 475   find a DC given a domain name and server type
 476  */
 477 static PyObject *py_net_finddc(py_net_Object *self, PyObject *args)
 478 {
 479         const char *domain_name;
 480         unsigned server_type;
 481         NTSTATUS status;
 482         struct finddcs *io;
 483         TALLOC_CTX *mem_ctx;
 484         PyObject *ret;
 485
 486         if (!PyArg_ParseTuple(args, "sI", &domain_name, &server_type)) {
 487                 return NULL;
 488         }
 489
 490         mem_ctx = talloc_new(self->mem_ctx);
 491
 492         io = talloc_zero(mem_ctx, struct finddcs);
 493         io->in.domain_name = domain_name;
 494         io->in.minimum_dc_flags = server_type;
 495
 496         status = finddcs_cldap(io, io,
 497                                lpcfg_resolve_context(self->libnet_ctx->lp_ctx), self->ev);
 498         if (NT_STATUS_IS_ERR(status)) {
 499                 PyErr_SetString(PyExc_RuntimeError, nt_errstr(status));
 500                 talloc_free(mem_ctx);
 501                 return NULL;
 502         }
 503
 504         ret = py_return_ndr_struct("samba.dcerpc.nbt", "NETLOGON_SAM_LOGON_RESPONSE_EX",
 505                                    io, &io->out.netlogon.data.nt5_ex);
 506         talloc_free(mem_ctx);
 507
 508         return ret;
 509 }
 510
 511
 512 static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
 513                                          "Vampire a domain.";
 514
 515 static const char py_net_replicate_init_doc[] = "replicate_init(samdb, lp, drspipe)\n"
 516                                          "Setup for replicate_chunk calls.";
 517
 518 static const char py_net_replicate_chunk_doc[] = "replicate_chunk(state, level, ctr, schema)\n"
 519                                          "Process replication for one chunk";
 520
 521 static const char py_net_finddc_doc[] = "finddc(domain, server_type)\n"
 522                                          "find a DC with the specified server_type bits. Return the DNS name";
 523
 524 static PyMethodDef net_obj_methods[] = {
 525         {"join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS, py_net_join_doc},
 526         {"set_password", (PyCFunction)py_net_set_password, METH_VARARGS|METH_KEYWORDS, py_net_set_password_doc},
 527         {"export_keytab", (PyCFunction)py_net_export_keytab, METH_VARARGS|METH_KEYWORDS, py_net_export_keytab_doc},
 528         {"time", (PyCFunction)py_net_time, METH_VARARGS|METH_KEYWORDS, py_net_time_doc},
 529         {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
 530         {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
 531         {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},
 532         {"replicate_init", (PyCFunction)py_net_replicate_init, METH_VARARGS|METH_KEYWORDS, py_net_replicate_init_doc},
 533         {"replicate_chunk", (PyCFunction)py_net_replicate_chunk, METH_VARARGS|METH_KEYWORDS, py_net_replicate_chunk_doc},
 534         {"finddc", (PyCFunction)py_net_finddc, METH_VARARGS, py_net_finddc_doc},
 535         { NULL }
 536 };
 537
 538 static void py_net_dealloc(py_net_Object *self)
 539 {
 540         talloc_free(self->mem_ctx);
 541 }
 542
 543 static PyObject *net_obj_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 544 {
 545         PyObject *py_creds, *py_lp = Py_None;
 546         const char *kwnames[] = { "creds", "lp", "server", NULL };
 547         py_net_Object *ret;
 548         struct loadparm_context *lp;
 549         const char *server_address = NULL;
 550
 551         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|Oz",
 552                                          discard_const_p(char *, kwnames), &py_creds, &py_lp,
 553                                          &server_address))
 554                 return NULL;
 555
 556         ret = PyObject_New(py_net_Object, type);
 557         if (ret == NULL) {
 558                 return NULL;
 559         }
 560
 561         /* FIXME: we really need to get a context from the caller or we may end
 562          * up with 2 event contexts */
 563         ret->ev = s4_event_context_init(NULL);
 564         ret->mem_ctx = talloc_new(ret->ev);
 565
 566         lp = lpcfg_from_py_object(ret->mem_ctx, py_lp);
 567         if (lp == NULL) {
 568                 Py_DECREF(ret);
 569                 return NULL;
 570         }
 571
 572         ret->libnet_ctx = libnet_context_init(ret->ev, lp);
 573         if (ret->libnet_ctx == NULL) {
 574                 PyErr_SetString(PyExc_RuntimeError, "Unable to initialize net");
 575                 Py_DECREF(ret);
 576                 return NULL;
 577         }
 578
 579         ret->libnet_ctx->server_address = server_address;
 580
 581         ret->libnet_ctx->cred = cli_credentials_from_py_object(py_creds);
 582         if (ret->libnet_ctx->cred == NULL) {
 583                 PyErr_SetString(PyExc_TypeError, "Expected credentials object");
 584                 Py_DECREF(ret);
 585                 return NULL;
 586         }
 587
 588         return (PyObject *)ret;
 589 }
 590
 591
 592 PyTypeObject py_net_Type = {
 593         PyObject_HEAD_INIT(NULL) 0,
 594         .tp_name = "net.Net",
 595         .tp_basicsize = sizeof(py_net_Object),
 596         .tp_dealloc = (destructor)py_net_dealloc,
 597         .tp_methods = net_obj_methods,
 598         .tp_new = net_obj_new,
 599 };
 600
 601 void initnet(void)
 602 {
 603         PyObject *m;
 604
 605         if (PyType_Ready(&py_net_Type) < 0)
 606                 return;
 607
 608         m = Py_InitModule3("net", NULL, NULL);
 609         if (m == NULL)
 610                 return;
 611
 612         Py_INCREF(&py_net_Type);
 613         PyModule_AddObject(m, "Net", (PyObject *)&py_net_Type);
 614         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOINDOMAIN_AUTOMATIC));
 615         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_SPECIFIED", PyInt_FromLong(LIBNET_JOINDOMAIN_SPECIFIED));
 616         PyModule_AddObject(m, "LIBNET_JOIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOIN_AUTOMATIC));
 617         PyModule_AddObject(m, "LIBNET_JOIN_SPECIFIED", PyInt_FromLong(LIBNET_JOIN_SPECIFIED));
 618 }