static void
cert_query_cb(void *arg, int status, int timeouts, unsigned char *abuf,
int alen)
{
Bincert *bincert = NULL;
ProxyContext *proxy_context = arg;
struct ares_txt_reply *txt_out;
struct ares_txt_reply *txt_out_current;
(void) timeouts;
DNSCRYPT_PROXY_CERTS_UPDATE_RECEIVED();
if (status != ARES_SUCCESS ||
ares_parse_txt_reply(abuf, alen, &txt_out) != ARES_SUCCESS) {
logger_noformat(proxy_context, LOG_ERR,
"Unable to retrieve server certificates");
cert_reschedule_query_after_failure(proxy_context);
DNSCRYPT_PROXY_CERTS_UPDATE_ERROR_COMMUNICATION();
return;
}
txt_out_current = txt_out;
while (txt_out_current != NULL) {
cert_open_bincert(proxy_context,
(const SignedBincert *) txt_out_current->txt,
txt_out_current->length, &bincert);
txt_out_current = txt_out_current->next;
}
ares_free_data(txt_out);
if (bincert == NULL) {
logger_noformat(proxy_context, LOG_ERR,
"No useable certificates found");
cert_reschedule_query_after_failure(proxy_context);
DNSCRYPT_PROXY_CERTS_UPDATE_ERROR_NOCERTS();
return;
}
COMPILER_ASSERT(sizeof proxy_context->resolver_publickey ==
sizeof bincert->server_publickey);
memcpy(proxy_context->resolver_publickey, bincert->server_publickey,
sizeof proxy_context->resolver_publickey);
COMPILER_ASSERT(sizeof proxy_context->dnscrypt_magic_query ==
sizeof bincert->magic_query);
memcpy(proxy_context->dnscrypt_magic_query, bincert->magic_query,
sizeof proxy_context->dnscrypt_magic_query);
cert_print_server_key(proxy_context);
dnscrypt_client_init_magic_query(&proxy_context->dnscrypt_client,
bincert->magic_query);
memset(bincert, 0, sizeof *bincert);
free(bincert);
dnscrypt_client_init_nmkey(&proxy_context->dnscrypt_client,
proxy_context->resolver_publickey);
dnscrypt_proxy_start_listeners(proxy_context);
proxy_context->cert_updater.query_retry_step = 0U;
cert_reschedule_query_after_success(proxy_context);
DNSCRYPT_PROXY_CERTS_UPDATE_DONE((unsigned char *)
proxy_context->resolver_publickey);
}
static void
query_txt_cb(void *arg, int status,int timeouts, unsigned char *answer_buf, int answer_len)
{
PyGILState_STATE gstate = PyGILState_Ensure();
int parse_status;
struct ares_txt_reply *txt_reply, *txt_ptr;
PyObject *dns_result, *errorno, *tmp, *result, *callback;
txt_reply = NULL;
callback = (PyObject *)arg;
ASSERT(callback);
if (status != ARES_SUCCESS) {
errorno = PyInt_FromLong((long)status);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
parse_status = ares_parse_txt_reply(answer_buf, answer_len, &txt_reply);
if (parse_status != ARES_SUCCESS) {
errorno = PyInt_FromLong((long)parse_status);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
dns_result = PyList_New(0);
if (!dns_result) {
PyErr_NoMemory();
PyErr_WriteUnraisable(Py_None);
errorno = PyInt_FromLong((long)ARES_ENOMEM);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
for (txt_ptr = txt_reply; txt_ptr != NULL; txt_ptr = txt_ptr->next) {
tmp = Py_BuildValue("s", (const char *)txt_ptr->txt);
if (tmp == NULL) {
break;
}
PyList_Append(dns_result, tmp);
Py_DECREF(tmp);
}
errorno = Py_None;
Py_INCREF(Py_None);
callback:
result = PyObject_CallFunctionObjArgs(callback, dns_result, errorno, NULL);
if (result == NULL) {
PyErr_WriteUnraisable(callback);
}
Py_XDECREF(result);
Py_DECREF(dns_result);
Py_DECREF(errorno);
if (txt_reply) {
ares_free_data(txt_reply);
}
Py_DECREF(callback);
PyGILState_Release(gstate);
}
static void
query_txt_cb(void *arg, int status,int timeouts, unsigned char *answer_buf, int answer_len)
{
PyGILState_STATE gstate = PyGILState_Ensure();
int parse_status;
struct ares_txt_reply *txt_reply, *txt_ptr;
ares_cb_data_t *data;
DNSResolver *self;
PyObject *dns_result, *errorno, *tmp, *result, *callback;
ASSERT(arg);
data = (ares_cb_data_t*)arg;
self = data->resolver;
callback = data->cb;
ASSERT(self);
/* Object could go out of scope in the callback, increase refcount to avoid it */
Py_INCREF(self);
if (status != ARES_SUCCESS) {
errorno = PyInt_FromLong((long)status);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
parse_status = ares_parse_txt_reply(answer_buf, answer_len, &txt_reply);
if (parse_status != ARES_SUCCESS) {
errorno = PyInt_FromLong((long)parse_status);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
dns_result = PyList_New(0);
if (!dns_result) {
PyErr_NoMemory();
PyErr_WriteUnraisable(Py_None);
errorno = PyInt_FromLong((long)ARES_ENOMEM);
dns_result = Py_None;
Py_INCREF(Py_None);
goto callback;
}
for (txt_ptr = txt_reply; txt_ptr != NULL; txt_ptr = txt_ptr->next) {
tmp = PyString_FromString((const char *)txt_ptr->txt);
if (tmp == NULL) {
break;
}
PyList_Append(dns_result, tmp);
Py_DECREF(tmp);
}
ares_free_data(txt_reply);
errorno = Py_None;
Py_INCREF(Py_None);
callback:
result = PyObject_CallFunctionObjArgs(callback, self, dns_result, errorno, NULL);
if (result == NULL) {
PyErr_WriteUnraisable(callback);
}
Py_XDECREF(result);
Py_DECREF(callback);
PyMem_Free(data);
Py_DECREF(self);
PyGILState_Release(gstate);
}
