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/*
* Copyright (c) 2015, Versign, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the <organization> nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Verisign, Include. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Python.h>
#include <getdns/getdns.h>
#include <arpa/inet.h>
#include "pygetdns.h"
/*
* Get the address of the Python function object
* being passed in by name to the context
* query methods
*/
PyObject *
get_callback(char *py_main, char *callback)
{
PyObject *main_module;
PyObject *main_dict;
PyObject *callback_func;
if ((main_module = PyImport_AddModule(py_main)) == 0) {
PyErr_SetString(getdns_error, "No 'main'");
return NULL;
}
main_dict = PyModule_GetDict(main_module);
if ((callback_func = PyDict_GetItemString(main_dict, callback)) == 0) {
PyErr_SetString(getdns_error, "callback not found\n");
return NULL;
}
if (!PyCallable_Check(callback_func)) {
PyErr_SetString(getdns_error, "The callback function is not runnable");
return NULL;
}
return callback_func;
}
void
callback_shim(struct getdns_context *context,
getdns_callback_type_t type,
struct getdns_dict *response,
void *userarg,
getdns_transaction_t tid)
{
PyObject *py_callback_type;
PyObject *py_result;
PyObject *py_tid;
PyObject *py_userarg;
userarg_blob *u = (userarg_blob *)userarg;
#if PY_MAJOR_VERSION >= 3
if ((py_callback_type = PyLong_FromLong((long)type)) == NULL) {
#else
if ((py_callback_type = PyInt_FromLong((long)type)) == NULL) {
#endif
PyObject *err_type, *err_value, *err_traceback;
PyErr_Fetch(&err_type, &err_value, &err_traceback);
PyErr_Restore(err_type, err_value, err_traceback);
return;
}
if (type == GETDNS_CALLBACK_CANCEL) {
py_result = Py_None;
py_tid = Py_None;
py_userarg = Py_None;
} else {
py_result = result_create(response);
#if PY_MAJOR_VERSION >= 3
py_tid = PyLong_FromLong((long)tid);
#else
py_tid = PyInt_FromLong((long)tid);
#endif
if (u->userarg)
#if PY_MAJOR_VERSION >= 3
py_userarg = PyUnicode_FromString(u->userarg);
#else
py_userarg = PyString_FromString(u->userarg);
#endif
else
py_userarg = Py_None;
}
PyObject_CallFunctionObjArgs(u->callback_func, py_callback_type, py_result, py_userarg, py_tid, NULL);
}
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