2 * pythonmod.c: unbound module C wrapper
4 * Copyright (c) 2009, Zdenek Vasicek (vasicek AT fit.vutbr.cz)
5 * Marek Vavrusa (xvavru00 AT stud.fit.vutbr.cz)
7 * This software is open source.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * * Redistributions of source code must retain the above copyright notice,
14 * this list of conditions and the following disclaimer.
16 * * Redistributions in binary form must reproduce the above copyright notice,
17 * this list of conditions and the following disclaimer in the documentation
18 * and/or other materials provided with the distribution.
20 * * Neither the name of the organization nor the names of its
21 * contributors may be used to endorse or promote products derived from this
22 * software without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
38 * Python module for unbound. Calls python script.
41 /* ignore the varargs unused warning from SWIGs internal vararg support */
43 #pragma GCC diagnostic ignored "-Wunused-parameter"
45 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
50 #include "sldns/sbuffer.h"
52 #undef _POSIX_C_SOURCE
56 #include "pythonmod/pythonmod.h"
57 #include "util/module.h"
58 #include "util/config_file.h"
59 #include "pythonmod_utils.h"
62 typedef struct PyObject PyObject;
63 typedef struct PyThreadState PyThreadState;
64 typedef void* PyGILState_STATE;
68 * Global state for the module.
70 struct pythonmod_env {
72 /** Python script filename. */
75 /** Python main thread */
76 PyThreadState* mainthr;
80 /** Module init function */
82 /** Module deinit function */
83 PyObject* func_deinit;
84 /** Module operate function */
85 PyObject* func_operate;
86 /** Module super_inform function */
87 PyObject* func_inform;
89 /** Python dictionary. */
96 struct module_qstate* qstate;
100 * Per query state for the iterator module.
102 struct pythonmod_qstate {
104 /** Module per query data. */
110 #include "pythonmod/interface.h"
113 int pythonmod_init(struct module_env* env, int id)
115 /* Initialize module */
116 FILE* script_py = NULL;
117 PyObject* py_init_arg, *res;
118 PyGILState_STATE gil;
119 int init_standard = 1;
121 struct pythonmod_env* pe = (struct pythonmod_env*)calloc(1, sizeof(struct pythonmod_env));
124 log_err("pythonmod: malloc failure");
128 env->modinfo[id] = (void*) pe;
130 /* Initialize module */
131 pe->fname = env->cfg->python_script;
132 if(pe->fname==NULL || pe->fname[0]==0) {
133 log_err("pythonmod: no script given.");
137 /* Initialize Python libraries */
138 if (!Py_IsInitialized())
140 #if PY_MAJOR_VERSION >= 3
142 mbstowcs(progname, "unbound", 8);
144 char *progname = "unbound";
146 Py_SetProgramName(progname);
148 #if PY_MAJOR_VERSION >= 3
149 PyImport_AppendInittab(SWIG_name, (void*)SWIG_init);
152 PyEval_InitThreads();
154 pe->mainthr = PyEval_SaveThread();
157 gil = PyGILState_Ensure();
159 /* Initialize Python */
160 PyRun_SimpleString("import sys \n");
161 PyRun_SimpleString("sys.path.append('.') \n");
162 if(env->cfg->directory && env->cfg->directory[0]) {
164 snprintf(wdir, sizeof(wdir), "sys.path.append('%s') \n",
165 env->cfg->directory);
166 PyRun_SimpleString(wdir);
168 PyRun_SimpleString("sys.path.append('"RUN_DIR"') \n");
169 PyRun_SimpleString("sys.path.append('"SHARE_DIR"') \n");
170 PyRun_SimpleString("import distutils.sysconfig \n");
171 PyRun_SimpleString("sys.path.append(distutils.sysconfig.get_python_lib(1,0)) \n");
172 if (PyRun_SimpleString("from unboundmodule import *\n") < 0)
174 log_err("pythonmod: cannot initialize core module: unboundmodule.py");
175 PyGILState_Release(gil);
179 /* Check Python file load */
180 if ((script_py = fopen(pe->fname, "r")) == NULL)
182 log_err("pythonmod: can't open file %s for reading", pe->fname);
183 PyGILState_Release(gil);
188 pe->module = PyImport_AddModule("__main__");
189 pe->dict = PyModule_GetDict(pe->module);
192 PyModule_AddObject(pe->module, "mod_env", pe->data);
194 /* TODO: deallocation of pe->... if an error occurs */
196 if (PyRun_SimpleFile(script_py, pe->fname) < 0)
198 log_err("pythonmod: can't parse Python script %s", pe->fname);
199 PyGILState_Release(gil);
205 if ((pe->func_init = PyDict_GetItemString(pe->dict, "init_standard")) == NULL)
208 if ((pe->func_init = PyDict_GetItemString(pe->dict, "init")) == NULL)
210 log_err("pythonmod: function init is missing in %s", pe->fname);
211 PyGILState_Release(gil);
215 if ((pe->func_deinit = PyDict_GetItemString(pe->dict, "deinit")) == NULL)
217 log_err("pythonmod: function deinit is missing in %s", pe->fname);
218 PyGILState_Release(gil);
221 if ((pe->func_operate = PyDict_GetItemString(pe->dict, "operate")) == NULL)
223 log_err("pythonmod: function operate is missing in %s", pe->fname);
224 PyGILState_Release(gil);
227 if ((pe->func_inform = PyDict_GetItemString(pe->dict, "inform_super")) == NULL)
229 log_err("pythonmod: function inform_super is missing in %s", pe->fname);
230 PyGILState_Release(gil);
236 py_init_arg = SWIG_NewPointerObj((void*) env, SWIGTYPE_p_module_env, 0);
240 py_init_arg = SWIG_NewPointerObj((void*) env->cfg,
241 SWIGTYPE_p_config_file, 0);
243 res = PyObject_CallFunction(pe->func_init, "iO", id, py_init_arg);
244 if (PyErr_Occurred())
246 log_err("pythonmod: Exception occurred in function init");
249 Py_XDECREF(py_init_arg);
250 PyGILState_Release(gil);
255 Py_XDECREF(py_init_arg);
256 PyGILState_Release(gil);
261 void pythonmod_deinit(struct module_env* env, int id)
263 struct pythonmod_env* pe = env->modinfo[id];
267 /* Free Python resources */
268 if(pe->module != NULL)
271 PyGILState_STATE gil = PyGILState_Ensure();
274 res = PyObject_CallFunction(pe->func_deinit, "i", id);
275 if (PyErr_Occurred()) {
276 log_err("pythonmod: Exception occurred in function deinit");
279 /* Free result if any */
281 /* Free shared data if any */
282 Py_XDECREF(pe->data);
283 PyGILState_Release(gil);
285 PyEval_RestoreThread(pe->mainthr);
292 /* Module is deallocated in Python */
293 env->modinfo[id] = NULL;
296 void pythonmod_inform_super(struct module_qstate* qstate, int id, struct module_qstate* super)
298 struct pythonmod_env* pe = (struct pythonmod_env*)qstate->env->modinfo[id];
299 struct pythonmod_qstate* pq = (struct pythonmod_qstate*)qstate->minfo[id];
300 PyObject* py_qstate, *py_sqstate, *res;
301 PyGILState_STATE gil = PyGILState_Ensure();
303 log_query_info(VERB_ALGO, "pythonmod: inform_super, sub is", &qstate->qinfo);
304 log_query_info(VERB_ALGO, "super is", &super->qinfo);
306 py_qstate = SWIG_NewPointerObj((void*) qstate, SWIGTYPE_p_module_qstate, 0);
307 py_sqstate = SWIG_NewPointerObj((void*) super, SWIGTYPE_p_module_qstate, 0);
309 res = PyObject_CallFunction(pe->func_inform, "iOOO", id, py_qstate,
310 py_sqstate, pq->data);
312 if (PyErr_Occurred())
314 log_err("pythonmod: Exception occurred in function inform_super");
316 qstate->ext_state[id] = module_error;
318 else if ((res == NULL) || (!PyObject_IsTrue(res)))
320 log_err("pythonmod: python returned bad code in inform_super");
321 qstate->ext_state[id] = module_error;
325 Py_XDECREF(py_sqstate);
326 Py_XDECREF(py_qstate);
328 PyGILState_Release(gil);
331 void pythonmod_operate(struct module_qstate* qstate, enum module_ev event,
332 int id, struct outbound_entry* ATTR_UNUSED(outbound))
334 struct pythonmod_env* pe = (struct pythonmod_env*)qstate->env->modinfo[id];
335 struct pythonmod_qstate* pq = (struct pythonmod_qstate*)qstate->minfo[id];
336 PyObject* py_qstate, *res;
337 PyGILState_STATE gil = PyGILState_Ensure();
342 pq = qstate->minfo[id] = malloc(sizeof(struct pythonmod_qstate));
344 /* Initialize per query data */
350 py_qstate = SWIG_NewPointerObj((void*) qstate, SWIGTYPE_p_module_qstate, 0);
351 res = PyObject_CallFunction(pe->func_operate, "iiOO", id, (int) event,
352 py_qstate, pq->data);
353 if (PyErr_Occurred())
355 log_err("pythonmod: Exception occurred in function operate, event: %s", strmodulevent(event));
357 qstate->ext_state[id] = module_error;
359 else if ((res == NULL) || (!PyObject_IsTrue(res)))
361 log_err("pythonmod: python returned bad code, event: %s", strmodulevent(event));
362 qstate->ext_state[id] = module_error;
365 Py_XDECREF(py_qstate);
367 PyGILState_Release(gil);
370 void pythonmod_clear(struct module_qstate* qstate, int id)
372 struct pythonmod_qstate* pq;
376 pq = (struct pythonmod_qstate*)qstate->minfo[id];
377 verbose(VERB_ALGO, "pythonmod: clear, id: %d, pq:%lX", id,
378 (unsigned long int)pq);
381 PyGILState_STATE gil = PyGILState_Ensure();
383 PyGILState_Release(gil);
388 qstate->minfo[id] = NULL;
391 size_t pythonmod_get_mem(struct module_env* env, int id)
393 struct pythonmod_env* pe = (struct pythonmod_env*)env->modinfo[id];
394 verbose(VERB_ALGO, "pythonmod: get_mem, id: %d, pe:%lX", id,
395 (unsigned long int)pe);
402 * The module function block
404 static struct module_func_block pythonmod_block = {
406 &pythonmod_init, &pythonmod_deinit, &pythonmod_operate, &pythonmod_inform_super,
407 &pythonmod_clear, &pythonmod_get_mem
410 struct module_func_block* pythonmod_get_funcblock(void)
412 return &pythonmod_block;