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-rw-r--r--source4/lib/messaging/pymessaging.c576
1 files changed, 576 insertions, 0 deletions
diff --git a/source4/lib/messaging/pymessaging.c b/source4/lib/messaging/pymessaging.c
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--- /dev/null
+++ b/source4/lib/messaging/pymessaging.c
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+/*
+ Unix SMB/CIFS implementation.
+ Copyright © Jelmer Vernooij <jelmer@samba.org> 2008
+
+ Based on the equivalent for EJS:
+ Copyright © Andrew Tridgell <tridge@samba.org> 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "lib/replace/system/python.h"
+#include "python/py3compat.h"
+#include "includes.h"
+#include "python/modules.h"
+#include "libcli/util/pyerrors.h"
+#include "librpc/rpc/pyrpc_util.h"
+#include "librpc/ndr/libndr.h"
+#include "lib/messaging/messaging.h"
+#include "lib/messaging/irpc.h"
+#include "lib/events/events.h"
+#include "cluster/cluster.h"
+#include "param/param.h"
+#include "param/pyparam.h"
+#include "librpc/rpc/dcerpc.h"
+#include "librpc/gen_ndr/server_id.h"
+#include <pytalloc.h>
+#include "messaging_internal.h"
+
+
+extern PyTypeObject imessaging_Type;
+
+static bool server_id_from_py(PyObject *object, struct server_id *server_id)
+{
+ Py_ssize_t tuple_size;
+
+ if (!PyTuple_Check(object)) {
+ if (!py_check_dcerpc_type(object, "samba.dcerpc.server_id", "server_id")) {
+
+ PyErr_SetString(PyExc_ValueError, "Expected tuple or server_id");
+ return false;
+ }
+ *server_id = *pytalloc_get_type(object, struct server_id);
+ return true;
+ }
+
+ tuple_size = PyTuple_Size(object);
+ if (tuple_size == 3) {
+ unsigned long long pid;
+ int task_id, vnn;
+
+ if (!PyArg_ParseTuple(object, "Kii", &pid, &task_id, &vnn)) {
+ return false;
+ }
+ server_id->pid = pid;
+ server_id->task_id = task_id;
+ server_id->vnn = vnn;
+ return true;
+ } else if (tuple_size == 2) {
+ unsigned long long pid;
+ int task_id;
+ if (!PyArg_ParseTuple(object, "Ki", &pid, &task_id))
+ return false;
+ *server_id = cluster_id(pid, task_id);
+ return true;
+ } else if (tuple_size == 1) {
+ unsigned long long pid = getpid();
+ int task_id;
+ if (!PyArg_ParseTuple(object, "i", &task_id))
+ return false;
+ *server_id = cluster_id(pid, task_id);
+ return true;
+ } else {
+ PyErr_SetString(PyExc_ValueError, "Expected tuple containing one, two, or three elements");
+ return false;
+ }
+}
+
+typedef struct {
+ PyObject_HEAD
+ TALLOC_CTX *mem_ctx;
+ struct imessaging_context *msg_ctx;
+} imessaging_Object;
+
+static PyObject *py_imessaging_connect(PyTypeObject *self, PyObject *args, PyObject *kwargs)
+{
+ struct tevent_context *ev;
+ const char *kwnames[] = { "own_id", "lp_ctx", NULL };
+ PyObject *own_id = Py_None;
+ PyObject *py_lp_ctx = Py_None;
+ imessaging_Object *ret;
+ struct loadparm_context *lp_ctx;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OO",
+ discard_const_p(char *, kwnames), &own_id, &py_lp_ctx)) {
+ return NULL;
+ }
+
+ ret = PyObject_New(imessaging_Object, &imessaging_Type);
+ if (ret == NULL)
+ return NULL;
+
+ ret->mem_ctx = talloc_new(NULL);
+
+ lp_ctx = lpcfg_from_py_object(ret->mem_ctx, py_lp_ctx);
+ if (lp_ctx == NULL) {
+ PyErr_SetString(PyExc_RuntimeError, "unable to interpret loadparm_context");
+ talloc_free(ret->mem_ctx);
+ return NULL;
+ }
+
+ ev = s4_event_context_init(ret->mem_ctx);
+
+ if (own_id != Py_None) {
+ struct server_id server_id;
+
+ if (!server_id_from_py(own_id, &server_id)) {
+ talloc_free(ret->mem_ctx);
+ return NULL;
+ }
+
+ ret->msg_ctx = imessaging_init(ret->mem_ctx,
+ lp_ctx,
+ server_id,
+ ev);
+ } else {
+ ret->msg_ctx = imessaging_client_init(ret->mem_ctx,
+ lp_ctx,
+ ev);
+ }
+
+ if (ret->msg_ctx == NULL) {
+ PyErr_SetString(PyExc_RuntimeError, "unable to create a messaging context");
+ talloc_free(ret->mem_ctx);
+ return NULL;
+ }
+
+ return (PyObject *)ret;
+}
+
+static void py_imessaging_dealloc(PyObject *self)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ talloc_free(iface->msg_ctx);
+ self->ob_type->tp_free(self);
+}
+
+static PyObject *py_imessaging_send(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ uint32_t msg_type;
+ DATA_BLOB data;
+ PyObject *target;
+ NTSTATUS status;
+ struct server_id server;
+ const char *kwnames[] = { "target", "msg_type", "data", NULL };
+ Py_ssize_t length;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIs#:send",
+ discard_const_p(char *, kwnames), &target, &msg_type, &data.data, &length)) {
+
+ return NULL;
+ }
+
+ data.length = length;
+
+ if (!server_id_from_py(target, &server))
+ return NULL;
+
+ status = imessaging_send(iface->msg_ctx, server, msg_type, &data);
+ if (NT_STATUS_IS_ERR(status)) {
+ PyErr_SetNTSTATUS(status);
+ return NULL;
+ }
+
+ Py_RETURN_NONE;
+}
+
+static void py_msg_callback_wrapper(struct imessaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ size_t num_fds,
+ int *fds,
+ DATA_BLOB *data)
+{
+ PyObject *py_server_id, *callback_and_tuple = (PyObject *)private_data;
+ PyObject *callback, *py_private;
+ PyObject *result = NULL;
+
+ struct server_id *p_server_id = NULL;
+
+ if (num_fds != 0) {
+ DBG_WARNING("Received %zu fds, ignoring message\n", num_fds);
+ return;
+ }
+
+ p_server_id = talloc(NULL, struct server_id);
+ if (!p_server_id) {
+ PyErr_NoMemory();
+ return;
+ }
+ *p_server_id = server_id;
+
+ py_server_id = py_return_ndr_struct("samba.dcerpc.server_id", "server_id", p_server_id, p_server_id);
+ talloc_unlink(NULL, p_server_id);
+ if (py_server_id == NULL) {
+ return;
+ }
+
+ if (!PyArg_ParseTuple(callback_and_tuple, "OO",
+ &callback,
+ &py_private)) {
+ return;
+ }
+
+ result = PyObject_CallFunction(callback, discard_const_p(char, "OiOs#"),
+ py_private,
+ msg_type,
+ py_server_id,
+ data->data, data->length);
+ Py_XDECREF(result);
+}
+
+static PyObject *py_imessaging_register(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ int msg_type = -1;
+ PyObject *callback_and_context;
+ NTSTATUS status;
+ const char *kwnames[] = { "callback_and_context", "msg_type", NULL };
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:register",
+ discard_const_p(char *, kwnames),
+ &callback_and_context, &msg_type)) {
+ return NULL;
+ }
+ if (!PyTuple_Check(callback_and_context)
+ || PyTuple_Size(callback_and_context) != 2) {
+ PyErr_SetString(PyExc_ValueError, "Expected tuple of size 2 for callback_and_context");
+ return NULL;
+ }
+
+ Py_INCREF(callback_and_context);
+
+ if (msg_type == -1) {
+ uint32_t msg_type32 = msg_type;
+ status = imessaging_register_tmp(iface->msg_ctx, callback_and_context,
+ py_msg_callback_wrapper, &msg_type32);
+ msg_type = msg_type32;
+ } else {
+ status = imessaging_register(iface->msg_ctx, callback_and_context,
+ msg_type, py_msg_callback_wrapper);
+ }
+ if (NT_STATUS_IS_ERR(status)) {
+ Py_DECREF(callback_and_context);
+ PyErr_SetNTSTATUS(status);
+ return NULL;
+ }
+
+ return PyLong_FromLong(msg_type);
+}
+
+static PyObject *py_imessaging_deregister(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ int msg_type = -1;
+ PyObject *callback;
+ const char *kwnames[] = { "callback", "msg_type", NULL };
+ size_t removed;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:deregister",
+ discard_const_p(char *, kwnames), &callback, &msg_type)) {
+ return NULL;
+ }
+
+ removed = imessaging_deregister(iface->msg_ctx, msg_type, callback);
+ while (removed-- > 0) {
+ Py_DECREF(callback);
+ }
+
+ Py_RETURN_NONE;
+}
+
+static void simple_timer_handler(struct tevent_context *ev,
+ struct tevent_timer *te,
+ struct timeval current_time,
+ void *private_data)
+{
+ return;
+}
+
+static PyObject *py_imessaging_loop_once(PyObject *self, PyObject *args, PyObject *kwargs)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ double offset;
+ int seconds;
+ struct timeval next_event;
+ struct tevent_timer *timer = NULL;
+ const char *kwnames[] = { "timeout", NULL };
+
+ TALLOC_CTX *frame = talloc_stackframe();
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "d",
+ discard_const_p(char *, kwnames), &offset)) {
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+
+ if (offset != 0.0) {
+ seconds = offset;
+ offset -= seconds;
+ next_event = tevent_timeval_current_ofs(seconds, (int)(offset*1000000));
+
+ timer = tevent_add_timer(iface->msg_ctx->ev, frame, next_event, simple_timer_handler,
+ NULL);
+ if (timer == NULL) {
+ PyErr_NoMemory();
+ TALLOC_FREE(frame);
+ return NULL;
+ }
+ }
+
+ tevent_loop_once(iface->msg_ctx->ev);
+
+ TALLOC_FREE(frame);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *py_irpc_add_name(PyObject *self, PyObject *args)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ char *server_name;
+ NTSTATUS status;
+
+ if (!PyArg_ParseTuple(args, "s", &server_name)) {
+ return NULL;
+ }
+
+ status = irpc_add_name(iface->msg_ctx, server_name);
+ if (!NT_STATUS_IS_OK(status)) {
+ PyErr_SetNTSTATUS(status);
+ return NULL;
+ }
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *py_irpc_remove_name(PyObject *self, PyObject *args)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ char *server_name;
+
+ if (!PyArg_ParseTuple(args, "s", &server_name)) {
+ return NULL;
+ }
+
+ irpc_remove_name(iface->msg_ctx, server_name);
+
+ Py_RETURN_NONE;
+}
+
+static PyObject *py_irpc_servers_byname(PyObject *self, PyObject *args)
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ char *server_name;
+ unsigned i, num_ids;
+ struct server_id *ids;
+ PyObject *pylist;
+ TALLOC_CTX *mem_ctx = talloc_new(NULL);
+ NTSTATUS status;
+
+ if (!mem_ctx) {
+ PyErr_NoMemory();
+ return NULL;
+ }
+
+ if (!PyArg_ParseTuple(args, "s", &server_name)) {
+ TALLOC_FREE(mem_ctx);
+ return NULL;
+ }
+
+ status = irpc_servers_byname(iface->msg_ctx, mem_ctx, server_name,
+ &num_ids, &ids);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(mem_ctx);
+ PyErr_SetString(PyExc_KeyError, "No such name");
+ return NULL;
+ }
+
+ pylist = PyList_New(num_ids);
+ if (pylist == NULL) {
+ TALLOC_FREE(mem_ctx);
+ PyErr_NoMemory();
+ return NULL;
+ }
+ for (i = 0; i < num_ids; i++) {
+ PyObject *py_server_id;
+ struct server_id *p_server_id = talloc(NULL, struct server_id);
+ if (!p_server_id) {
+ TALLOC_FREE(mem_ctx);
+ PyErr_NoMemory();
+ return NULL;
+ }
+ *p_server_id = ids[i];
+
+ py_server_id = py_return_ndr_struct("samba.dcerpc.server_id", "server_id", p_server_id, p_server_id);
+ if (!py_server_id) {
+ TALLOC_FREE(mem_ctx);
+ return NULL;
+ }
+ PyList_SetItem(pylist, i, py_server_id);
+ talloc_unlink(NULL, p_server_id);
+ }
+ TALLOC_FREE(mem_ctx);
+ return pylist;
+}
+
+static PyObject *py_irpc_all_servers(PyObject *self,
+ PyObject *Py_UNUSED(ignored))
+{
+ imessaging_Object *iface = (imessaging_Object *)self;
+ PyObject *pylist;
+ int i;
+ struct irpc_name_records *records;
+ TALLOC_CTX *mem_ctx = talloc_new(NULL);
+ if (!mem_ctx) {
+ PyErr_NoMemory();
+ return NULL;
+ }
+
+ records = irpc_all_servers(iface->msg_ctx, mem_ctx);
+ if (records == NULL) {
+ TALLOC_FREE(mem_ctx);
+ PyErr_NoMemory();
+ return NULL;
+ }
+
+ pylist = PyList_New(records->num_records);
+ if (pylist == NULL) {
+ TALLOC_FREE(mem_ctx);
+ PyErr_NoMemory();
+ return NULL;
+ }
+ for (i = 0; i < records->num_records; i++) {
+ PyObject *py_name_record
+ = py_return_ndr_struct("samba.dcerpc.irpc",
+ "name_record",
+ records->names[i],
+ records->names[i]);
+ if (!py_name_record) {
+ TALLOC_FREE(mem_ctx);
+ return NULL;
+ }
+ PyList_SetItem(pylist, i,
+ py_name_record);
+ }
+ TALLOC_FREE(mem_ctx);
+ return pylist;
+}
+
+static PyMethodDef py_imessaging_methods[] = {
+ { "send", PY_DISCARD_FUNC_SIG(PyCFunction, py_imessaging_send),
+ METH_VARARGS|METH_KEYWORDS,
+ "S.send(target, msg_type, data) -> None\nSend a message" },
+ { "register", PY_DISCARD_FUNC_SIG(PyCFunction, py_imessaging_register),
+ METH_VARARGS|METH_KEYWORDS,
+ "S.register((callback, context), msg_type=None) -> msg_type\nRegister a message handler. "
+ "The callback and context must be supplied as a two-element tuple." },
+ { "deregister", PY_DISCARD_FUNC_SIG(PyCFunction,
+ py_imessaging_deregister),
+ METH_VARARGS|METH_KEYWORDS,
+ "S.deregister((callback, context), msg_type) -> None\nDeregister a message handler "
+ "The callback and context must be supplied as the exact same two-element tuple "
+ "as was used at registration time." },
+ { "loop_once", PY_DISCARD_FUNC_SIG(PyCFunction,
+ py_imessaging_loop_once),
+ METH_VARARGS|METH_KEYWORDS,
+ "S.loop_once(timeout) -> None\n"
+ "Loop on the internal event context until we get an event "
+ "(which might be a message calling the callback), "
+ "timeout after timeout seconds (if not 0)" },
+ { "irpc_add_name", (PyCFunction)py_irpc_add_name, METH_VARARGS,
+ "S.irpc_add_name(name) -> None\n"
+ "Add this context to the list of server_id values that "
+ "are registered for a particular name" },
+ { "irpc_remove_name", (PyCFunction)py_irpc_remove_name, METH_VARARGS,
+ "S.irpc_remove_name(name) -> None\n"
+ "Remove this context from the list of server_id values that "
+ "are registered for a particular name" },
+ { "irpc_servers_byname", (PyCFunction)py_irpc_servers_byname, METH_VARARGS,
+ "S.irpc_servers_byname(name) -> list\nGet list of server_id values that are registered for a particular name" },
+ { "irpc_all_servers", (PyCFunction)py_irpc_all_servers, METH_NOARGS,
+ "S.irpc_all_servers() -> list\n"
+ "Get list of all registered names and the associated server_id values" },
+ { NULL, NULL, 0, NULL }
+};
+
+static PyObject *py_imessaging_server_id(PyObject *obj, void *closure)
+{
+ imessaging_Object *iface = (imessaging_Object *)obj;
+ PyObject *py_server_id;
+ struct server_id server_id = imessaging_get_server_id(iface->msg_ctx);
+ struct server_id *p_server_id = talloc(NULL, struct server_id);
+ if (!p_server_id) {
+ PyErr_NoMemory();
+ return NULL;
+ }
+ *p_server_id = server_id;
+
+ py_server_id = py_return_ndr_struct("samba.dcerpc.server_id", "server_id", p_server_id, p_server_id);
+ talloc_unlink(NULL, p_server_id);
+
+ return py_server_id;
+}
+
+static PyGetSetDef py_imessaging_getset[] = {
+ {
+ .name = discard_const_p(char, "server_id"),
+ .get = py_imessaging_server_id,
+ .doc = discard_const_p(char, "local server id")
+ },
+ { .name = NULL },
+};
+
+
+PyTypeObject imessaging_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ .tp_name = "messaging.Messaging",
+ .tp_basicsize = sizeof(imessaging_Object),
+ .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+ .tp_new = py_imessaging_connect,
+ .tp_dealloc = py_imessaging_dealloc,
+ .tp_methods = py_imessaging_methods,
+ .tp_getset = py_imessaging_getset,
+ .tp_doc = "Messaging(own_id=None, lp_ctx=None)\n" \
+ "Create a new object that can be used to communicate with the peers in the specified messaging path.\n"
+};
+
+static struct PyModuleDef moduledef = {
+ PyModuleDef_HEAD_INIT,
+ .m_name = "messaging",
+ .m_doc = "Internal RPC",
+ .m_size = -1,
+ .m_methods = NULL,
+};
+
+MODULE_INIT_FUNC(messaging)
+{
+ PyObject *mod;
+
+ if (PyType_Ready(&imessaging_Type) < 0)
+ return NULL;
+
+ mod = PyModule_Create(&moduledef);
+ if (mod == NULL)
+ return NULL;
+
+ Py_INCREF((PyObject *)&imessaging_Type);
+ PyModule_AddObject(mod, "Messaging", (PyObject *)&imessaging_Type);
+ PyModule_AddObject(mod, "IRPC_CALL_TIMEOUT", PyLong_FromLong(IRPC_CALL_TIMEOUT));
+ PyModule_AddObject(mod, "IRPC_CALL_TIMEOUT_INF", PyLong_FromLong(IRPC_CALL_TIMEOUT_INF));
+
+ return mod;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 11:57:03 +0000