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 <Python.h>
  22 #include "includes.h"
  23 #include <ldb.h>
  24 #include <pyldb.h>
  25 #include "libnet.h"
  26 #include "auth/credentials/pycredentials.h"
  27 #include "libcli/security/security.h"
  28 #include "lib/events/events.h"
  29 #include "param/pyparam.h"
  30 #include "auth/gensec/gensec.h"
  31 #include "librpc/rpc/pyrpc_util.h"
  32 #include "libcli/finddc.h"
  33 #include "libcli/resolve/resolve.h"
  34
  35 void initnet(void);
  36
  37 typedef struct {
  38         PyObject_HEAD
  39         TALLOC_CTX *mem_ctx;
  40         struct libnet_context *libnet_ctx;
  41         struct tevent_context *ev;
  42 } py_net_Object;
  43
  44 static PyObject *py_net_join(py_net_Object *self, PyObject *args, PyObject *kwargs)
  45 {
  46         struct libnet_Join r;
  47         NTSTATUS status;
  48         PyObject *result;
  49         TALLOC_CTX *mem_ctx;
  50         const char *kwnames[] = { "domain_name", "netbios_name", "join_type", "level", NULL };
  51
  52         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssii:Join", discard_const_p(char *, kwnames),
  53                                          &r.in.domain_name, &r.in.netbios_name,
  54                                          &r.in.join_type, &r.in.level))
  55                 return NULL;
  56
  57         mem_ctx = talloc_new(self->mem_ctx);
  58         if (mem_ctx == NULL) {
  59                 PyErr_NoMemory();
  60                 return NULL;
  61         }
  62
  63         status = libnet_Join(self->libnet_ctx, mem_ctx, &r);
  64         if (NT_STATUS_IS_ERR(status)) {
  65                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
  66                 talloc_free(mem_ctx);
  67                 return NULL;
  68         }
  69
  70         result = Py_BuildValue("sss", r.out.join_password,
  71                                dom_sid_string(mem_ctx, r.out.domain_sid),
  72                                r.out.domain_name);
  73
  74         talloc_free(mem_ctx);
  75
  76         return result;
  77 }
  78
  79 static const char py_net_join_doc[] = "join(domain_name, netbios_name, join_type, level) -> (join_password, domain_sid, domain_name)\n\n" \
  80 "Join the domain with the specified name.";
  81
  82 static PyObject *py_net_set_password(py_net_Object *self, PyObject *args, PyObject *kwargs)
  83 {
  84         union libnet_SetPassword r;
  85         NTSTATUS status;
  86         PyObject *py_creds;
  87         TALLOC_CTX *mem_ctx;
  88         struct tevent_context *ev;
  89         const char *kwnames[] = { "account_name", "domain_name", "newpassword", "credentials", NULL };
  90
  91         r.generic.level = LIBNET_SET_PASSWORD_GENERIC;
  92
  93         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sssO:set_password", discard_const_p(char *, kwnames),
  94                                          &r.generic.in.account_name, &r.generic.in.domain_name,
  95                                          &r.generic.in.newpassword, &py_creds)) {
  96                 return NULL;
  97         }
  98
  99         /* FIXME: we really need to get a context from the caller or we may end
 100          * up with 2 event contexts */
 101         ev = s4_event_context_init(NULL);
 102
 103         mem_ctx = talloc_new(ev);
 104         if (mem_ctx == NULL) {
 105                 PyErr_NoMemory();
 106                 return NULL;
 107         }
 108
 109         status = libnet_SetPassword(self->libnet_ctx, mem_ctx, &r);
 110         if (NT_STATUS_IS_ERR(status)) {
 111                 PyErr_SetString(PyExc_RuntimeError,
 112                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 113                 talloc_free(mem_ctx);
 114                 return NULL;
 115         }
 116
 117         talloc_free(mem_ctx);
 118
 119         Py_RETURN_NONE;
 120 }
 121
 122 static const char py_net_set_password_doc[] = "set_password(account_name, domain_name, newpassword) -> True\n\n" \
 123 "Set password for a user. You must supply credential with enough rights to do this.\n\n" \
 124 "Sample usage is:\n" \
 125 "net.set_password(account_name=<account_name>,\n" \
 126 "                domain_name=domain_name,\n" \
 127 "                newpassword=new_pass)\n";
 128
 129
 130 static PyObject *py_net_export_keytab(py_net_Object *self, PyObject *args, PyObject *kwargs)
 131 {
 132         struct libnet_export_keytab r;
 133         TALLOC_CTX *mem_ctx;
 134         const char *kwnames[] = { "keytab", NULL };
 135         NTSTATUS status;
 136
 137         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:export_keytab", discard_const_p(char *, kwnames),
 138                                          &r.in.keytab_name)) {
 139                 return NULL;
 140         }
 141
 142         mem_ctx = talloc_new(self->mem_ctx);
 143         if (mem_ctx == NULL) {
 144                 PyErr_NoMemory();
 145                 return NULL;
 146         }
 147
 148         status = libnet_export_keytab(self->libnet_ctx, mem_ctx, &r);
 149         if (NT_STATUS_IS_ERR(status)) {
 150                 PyErr_SetString(PyExc_RuntimeError,
 151                                 r.out.error_string?r.out.error_string:nt_errstr(status));
 152                 talloc_free(mem_ctx);
 153                 return NULL;
 154         }
 155
 156         talloc_free(mem_ctx);
 157
 158         Py_RETURN_NONE;
 159 }
 160
 161 static const char py_net_export_keytab_doc[] = "export_keytab(keytab, name)\n\n"
 162 "Export the DC keytab to a keytab file.";
 163
 164 static PyObject *py_net_time(py_net_Object *self, PyObject *args, PyObject *kwargs)
 165 {
 166         const char *kwnames[] = { "server_name", NULL };
 167         union libnet_RemoteTOD r;
 168         NTSTATUS status;
 169         TALLOC_CTX *mem_ctx;
 170         char timestr[64];
 171         PyObject *ret;
 172         struct tm *tm;
 173
 174         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s",
 175                 discard_const_p(char *, kwnames), &r.generic.in.server_name))
 176                 return NULL;
 177
 178         r.generic.level                 = LIBNET_REMOTE_TOD_GENERIC;
 179
 180         mem_ctx = talloc_new(NULL);
 181         if (mem_ctx == NULL) {
 182                 PyErr_NoMemory();
 183                 return NULL;
 184         }
 185
 186         status = libnet_RemoteTOD(self->libnet_ctx, mem_ctx, &r);
 187         if (!NT_STATUS_IS_OK(status)) {
 188                 PyErr_SetString(PyExc_RuntimeError,
 189                                 r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
 190                 talloc_free(mem_ctx);
 191                 return NULL;
 192         }
 193
 194         ZERO_STRUCT(timestr);
 195         tm = localtime(&r.generic.out.time);
 196         strftime(timestr, sizeof(timestr)-1, "%c %Z",tm);
 197
 198         ret = PyString_FromString(timestr);
 199
 200         talloc_free(mem_ctx);
 201
 202         return ret;
 203 }
 204
 205 static const char py_net_time_doc[] = "time(server_name) -> timestr\n"
 206 "Retrieve the remote time on a server";
 207
 208 static PyObject *py_net_user_create(py_net_Object *self, PyObject *args, PyObject *kwargs)
 209 {
 210         const char *kwnames[] = { "username", NULL };
 211         NTSTATUS status;
 212         TALLOC_CTX *mem_ctx;
 213         struct libnet_CreateUser r;
 214
 215         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 216                                                                          &r.in.user_name))
 217                 return NULL;
 218
 219         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 220
 221         mem_ctx = talloc_new(NULL);
 222         if (mem_ctx == NULL) {
 223                 PyErr_NoMemory();
 224                 return NULL;
 225         }
 226
 227         status = libnet_CreateUser(self->libnet_ctx, mem_ctx, &r);
 228         if (!NT_STATUS_IS_OK(status)) {
 229                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 230                 talloc_free(mem_ctx);
 231                 return NULL;
 232         }
 233
 234         talloc_free(mem_ctx);
 235
 236         Py_RETURN_NONE;
 237 }
 238
 239 static const char py_net_create_user_doc[] = "create_user(username)\n"
 240 "Create a new user.";
 241
 242 static PyObject *py_net_user_delete(py_net_Object *self, PyObject *args, PyObject *kwargs)
 243 {
 244         const char *kwnames[] = { "username", NULL };
 245         NTSTATUS status;
 246         TALLOC_CTX *mem_ctx;
 247         struct libnet_DeleteUser r;
 248
 249         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames),
 250                                                                          &r.in.user_name))
 251                 return NULL;
 252
 253         r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
 254
 255         mem_ctx = talloc_new(NULL);
 256         if (mem_ctx == NULL) {
 257                 PyErr_NoMemory();
 258                 return NULL;
 259         }
 260
 261         status = libnet_DeleteUser(self->libnet_ctx, mem_ctx, &r);
 262         if (!NT_STATUS_IS_OK(status)) {
 263                 PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
 264                 talloc_free(mem_ctx);
 265                 return NULL;
 266         }
 267
 268         talloc_free(mem_ctx);
 269
 270         Py_RETURN_NONE;
 271 }
 272
 273 static const char py_net_delete_user_doc[] = "delete_user(username)\n"
 274 "Delete a user.";
 275
 276 static PyObject *py_dom_sid_FromSid(struct dom_sid *sid)
 277 {
 278         PyObject *mod_security, *dom_sid_Type;
 279
 280         mod_security = PyImport_ImportModule("samba.dcerpc.security");
 281         if (mod_security == NULL)
 282                 return NULL;
 283
 284         dom_sid_Type = PyObject_GetAttrString(mod_security, "dom_sid");
 285         if (dom_sid_Type == NULL)
 286                 return NULL;
 287
 288         return py_talloc_reference((PyTypeObject *)dom_sid_Type, sid);
 289 }
 290
 291 static PyObject *py_net_vampire(py_net_Object *self, PyObject *args, PyObject *kwargs)
 292 {
 293         const char *kwnames[] = { "domain", "target_dir", NULL };
 294         NTSTATUS status;
 295         TALLOC_CTX *mem_ctx;
 296         PyObject *ret;
 297         struct libnet_Vampire r;
 298
 299         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z", discard_const_p(char *, kwnames),
 300                                          &r.in.domain_name, &r.in.targetdir)) {
 301                 return NULL;
 302         }
 303
 304         r.in.netbios_name  = lpcfg_netbios_name(self->libnet_ctx->lp_ctx);
 305         r.out.error_string = NULL;
 306
 307         mem_ctx = talloc_new(NULL);
 308         if (mem_ctx == NULL) {
 309                 PyErr_NoMemory();
 310                 return NULL;
 311         }
 312
 313         status = libnet_Vampire(self->libnet_ctx, mem_ctx, &r);
 314
 315         if (!NT_STATUS_IS_OK(status)) {
 316                 PyErr_SetString(PyExc_RuntimeError,
 317                                 r.out.error_string ? r.out.error_string : nt_errstr(status));
 318                 talloc_free(mem_ctx);
 319                 return NULL;
 320         }
 321
 322         ret = Py_BuildValue("(sO)", r.out.domain_name, py_dom_sid_FromSid(r.out.domain_sid));
 323
 324         talloc_free(mem_ctx);
 325
 326         return ret;
 327 }
 328
 329 struct replicate_state {
 330         void *vampire_state;
 331         dcerpc_InterfaceObject *drs_pipe;
 332         struct libnet_BecomeDC_StoreChunk chunk;
 333         DATA_BLOB gensec_skey;
 334         struct libnet_BecomeDC_Partition partition;
 335         struct libnet_BecomeDC_Forest forest;
 336         struct libnet_BecomeDC_DestDSA dest_dsa;
 337 };
 338
 339 /*
 340   setup for replicate_chunk() calls
 341  */
 342 static PyObject *py_net_replicate_init(py_net_Object *self, PyObject *args, PyObject *kwargs)
 343 {
 344         const char *kwnames[] = { "samdb", "lp", "drspipe", NULL };
 345         PyObject *py_ldb, *py_lp, *py_drspipe;
 346         struct ldb_context *samdb;
 347         struct loadparm_context *lp;
 348         struct replicate_state *s;
 349         NTSTATUS status;
 350
 351         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OOO",
 352                                          discard_const_p(char *, kwnames),
 353                                          &py_ldb, &py_lp, &py_drspipe)) {
 354                 return NULL;
 355         }
 356
 357         s = talloc_zero(NULL, struct replicate_state);
 358         if (!s) return NULL;
 359
 360         lp = lpcfg_from_py_object(s, py_lp);
 361         if (lp == NULL) {
 362                 PyErr_SetString(PyExc_TypeError, "Expected lp object");
 363                 talloc_free(s);
 364                 return NULL;
 365         }
 366
 367         samdb = PyLdb_AsLdbContext(py_ldb);
 368         if (samdb == NULL) {
 369                 PyErr_SetString(PyExc_TypeError, "Expected ldb object");
 370                 talloc_free(s);
 371                 return NULL;
 372         }
 373
 374         s->drs_pipe = (dcerpc_InterfaceObject *)(py_drspipe);
 375
 376         s->vampire_state = libnet_vampire_replicate_init(s, samdb, lp);
 377         if (s->vampire_state == NULL) {
 378                 PyErr_SetString(PyExc_TypeError, "Failed to initialise vampire_state");
 379                 talloc_free(s);
 380                 return NULL;
 381         }
 382
 383         status = gensec_session_key(s->drs_pipe->pipe->conn->security_state.generic_state,
 384                                     &s->gensec_skey);
 385         if (!NT_STATUS_IS_OK(status)) {
 386                 PyErr_Format(PyExc_RuntimeError, "Unable to get session key from drspipe: %s",
 387                              nt_errstr(status));
 388                 talloc_free(s);
 389                 return NULL;
 390         }
 391
 392         s->forest.dns_name = lpcfg_dnsdomain(lp);
 393
 394         s->chunk.gensec_skey = &s->gensec_skey;
 395         s->chunk.partition = &s->partition;
 396         s->chunk.forest = &s->forest;
 397         s->chunk.dest_dsa = &s->dest_dsa;
 398
 399         return PyCObject_FromTallocPtr(s);
 400 }
 401
 402
 403 /*
 404   process one replication chunk
 405  */
 406 static PyObject *py_net_replicate_chunk(py_net_Object *self, PyObject *args, PyObject *kwargs)
 407 {
 408         const char *kwnames[] = { "state", "level", "ctr", "schema", NULL };
 409         PyObject *py_state, *py_ctr, *py_schema;
 410         struct replicate_state *s;
 411         unsigned level;
 412         NTSTATUS (*chunk_handler)(void *private_data, const struct libnet_BecomeDC_StoreChunk *c);
 413         NTSTATUS status;
 414
 415         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIO|O",
 416                                          discard_const_p(char *, kwnames),
 417                                          &py_state, &level, &py_ctr, &py_schema)) {
 418                 return NULL;
 419         }
 420
 421         s = talloc_get_type(PyCObject_AsVoidPtr(py_state), struct replicate_state);
 422         if (!s) {
 423                 PyErr_SetString(PyExc_TypeError, "Expected replication_state");
 424                 return NULL;
 425         }
 426
 427         switch (level) {
 428         case 1:
 429                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr1")) {
 430                         return NULL;
 431                 }
 432                 s->chunk.ctr1                         = py_talloc_get_ptr(py_ctr);
 433                 s->partition.nc                       = *s->chunk.ctr1->naming_context;
 434                 s->partition.more_data                = s->chunk.ctr1->more_data;
 435                 s->partition.source_dsa_guid          = s->chunk.ctr1->source_dsa_guid;
 436                 s->partition.source_dsa_invocation_id = s->chunk.ctr1->source_dsa_invocation_id;
 437                 s->partition.highwatermark            = s->chunk.ctr1->new_highwatermark;
 438                 break;
 439         case 6:
 440                 if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr6")) {
 441                         return NULL;
 442                 }
 443                 s->chunk.ctr6                         = py_talloc_get_ptr(py_ctr);
 444                 s->partition.nc                       = *s->chunk.ctr6->naming_context;
 445                 s->partition.more_data                = s->chunk.ctr6->more_data;
 446                 s->partition.source_dsa_guid          = s->chunk.ctr6->source_dsa_guid;
 447                 s->partition.source_dsa_invocation_id = s->chunk.ctr6->source_dsa_invocation_id;
 448                 s->partition.highwatermark            = s->chunk.ctr6->new_highwatermark;
 449                 break;
 450         default:
 451                 PyErr_Format(PyExc_TypeError, "Bad level %u in replicate_chunk", level);
 452                 return NULL;
 453         }
 454
 455         chunk_handler = libnet_vampire_cb_store_chunk;
 456         if (py_schema) {
 457                 if (!PyBool_Check(py_schema)) {
 458                         PyErr_SetString(PyExc_TypeError, "Expected boolean schema");
 459                         return NULL;
 460                 }
 461                 if (py_schema == Py_True) {
 462                         chunk_handler = libnet_vampire_cb_schema_chunk;
 463                 }
 464         }
 465
 466         s->chunk.ctr_level = level;
 467
 468         status = chunk_handler(s->vampire_state, &s->chunk);
 469         if (!NT_STATUS_IS_OK(status)) {
 470                 PyErr_Format(PyExc_TypeError, "Failed to process chunk: %s", nt_errstr(status));
 471                 return NULL;
 472         }
 473
 474         Py_RETURN_NONE;
 475 }
 476
 477
 478 /*
 479   find a DC given a domain name and server type
 480  */
 481 static PyObject *py_net_finddc(py_net_Object *self, PyObject *args)
 482 {
 483         const char *domain_name;
 484         unsigned server_type;
 485         NTSTATUS status;
 486         struct finddcs *io;
 487         TALLOC_CTX *mem_ctx;
 488         PyObject *ret;
 489
 490         if (!PyArg_ParseTuple(args, "sI", &domain_name, &server_type)) {
 491                 return NULL;
 492         }
 493
 494         mem_ctx = talloc_new(self->mem_ctx);
 495
 496         io = talloc_zero(mem_ctx, struct finddcs);
 497         io->in.domain_name = domain_name;
 498         io->in.minimum_dc_flags = server_type;
 499
 500         status = finddcs_cldap(io, io,
 501                                lpcfg_resolve_context(self->libnet_ctx->lp_ctx), self->ev);
 502         if (NT_STATUS_IS_ERR(status)) {
 503                 PyErr_SetString(PyExc_RuntimeError, nt_errstr(status));
 504                 talloc_free(mem_ctx);
 505                 return NULL;
 506         }
 507
 508         ret = py_return_ndr_struct("samba.dcerpc.nbt", "NETLOGON_SAM_LOGON_RESPONSE_EX",
 509                                    io, &io->out.netlogon.data.nt5_ex);
 510         talloc_free(mem_ctx);
 511
 512         return ret;
 513 }
 514
 515
 516 static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
 517                                          "Vampire a domain.";
 518
 519 static const char py_net_replicate_init_doc[] = "replicate_init(samdb, lp, drspipe)\n"
 520                                          "Setup for replicate_chunk calls.";
 521
 522 static const char py_net_replicate_chunk_doc[] = "replicate_chunk(state, level, ctr, schema)\n"
 523                                          "Process replication for one chunk";
 524
 525 static const char py_net_finddc_doc[] = "finddc(domain, server_type)\n"
 526                                          "find a DC with the specified server_type bits. Return the DNS name";
 527
 528 static PyMethodDef net_obj_methods[] = {
 529         {"join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS, py_net_join_doc},
 530         {"set_password", (PyCFunction)py_net_set_password, METH_VARARGS|METH_KEYWORDS, py_net_set_password_doc},
 531         {"export_keytab", (PyCFunction)py_net_export_keytab, METH_VARARGS|METH_KEYWORDS, py_net_export_keytab_doc},
 532         {"time", (PyCFunction)py_net_time, METH_VARARGS|METH_KEYWORDS, py_net_time_doc},
 533         {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
 534         {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
 535         {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},
 536         {"replicate_init", (PyCFunction)py_net_replicate_init, METH_VARARGS|METH_KEYWORDS, py_net_replicate_init_doc},
 537         {"replicate_chunk", (PyCFunction)py_net_replicate_chunk, METH_VARARGS|METH_KEYWORDS, py_net_replicate_chunk_doc},
 538         {"finddc", (PyCFunction)py_net_finddc, METH_VARARGS, py_net_finddc_doc},
 539         { NULL }
 540 };
 541
 542 static void py_net_dealloc(py_net_Object *self)
 543 {
 544         talloc_free(self->mem_ctx);
 545         PyObject_Del(self);
 546 }
 547
 548 static PyObject *net_obj_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 549 {
 550         PyObject *py_creds, *py_lp = Py_None;
 551         const char *kwnames[] = { "creds", "lp", "server", NULL };
 552         py_net_Object *ret;
 553         struct loadparm_context *lp;
 554         const char *server_address = NULL;
 555
 556         if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|Oz",
 557                                          discard_const_p(char *, kwnames), &py_creds, &py_lp,
 558                                          &server_address))
 559                 return NULL;
 560
 561         ret = PyObject_New(py_net_Object, type);
 562         if (ret == NULL) {
 563                 return NULL;
 564         }
 565
 566         /* FIXME: we really need to get a context from the caller or we may end
 567          * up with 2 event contexts */
 568         ret->ev = s4_event_context_init(NULL);
 569         ret->mem_ctx = talloc_new(ret->ev);
 570
 571         lp = lpcfg_from_py_object(ret->mem_ctx, py_lp);
 572         if (lp == NULL) {
 573                 Py_DECREF(ret);
 574                 return NULL;
 575         }
 576
 577         ret->libnet_ctx = libnet_context_init(ret->ev, lp);
 578         if (ret->libnet_ctx == NULL) {
 579                 PyErr_SetString(PyExc_RuntimeError, "Unable to initialize net");
 580                 Py_DECREF(ret);
 581                 return NULL;
 582         }
 583
 584         ret->libnet_ctx->server_address = server_address;
 585
 586         ret->libnet_ctx->cred = cli_credentials_from_py_object(py_creds);
 587         if (ret->libnet_ctx->cred == NULL) {
 588                 PyErr_SetString(PyExc_TypeError, "Expected credentials object");
 589                 Py_DECREF(ret);
 590                 return NULL;
 591         }
 592
 593         return (PyObject *)ret;
 594 }
 595
 596
 597 PyTypeObject py_net_Type = {
 598         PyObject_HEAD_INIT(NULL) 0,
 599         .tp_name = "net.Net",
 600         .tp_basicsize = sizeof(py_net_Object),
 601         .tp_dealloc = (destructor)py_net_dealloc,
 602         .tp_methods = net_obj_methods,
 603         .tp_new = net_obj_new,
 604 };
 605
 606 void initnet(void)
 607 {
 608         PyObject *m;
 609
 610         if (PyType_Ready(&py_net_Type) < 0)
 611                 return;
 612
 613         m = Py_InitModule3("net", NULL, NULL);
 614         if (m == NULL)
 615                 return;
 616
 617         Py_INCREF(&py_net_Type);
 618         PyModule_AddObject(m, "Net", (PyObject *)&py_net_Type);
 619         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOINDOMAIN_AUTOMATIC));
 620         PyModule_AddObject(m, "LIBNET_JOINDOMAIN_SPECIFIED", PyInt_FromLong(LIBNET_JOINDOMAIN_SPECIFIED));
 621         PyModule_AddObject(m, "LIBNET_JOIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOIN_AUTOMATIC));
 622         PyModule_AddObject(m, "LIBNET_JOIN_SPECIFIED", PyInt_FromLong(LIBNET_JOIN_SPECIFIED));
 623 }