Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 551 insertions, 0 deletions

diff --git a/source4/lib/messaging/pymessaging.c b/source4/lib/messaging/pymessaging.c
new file mode 100644
index 0000000..148c941
--- /dev/null
+++ b/source4/lib/messaging/pymessaging.c
@@ -0,0 +1,551 @@
+/* 
+   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 <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)
+{
+	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;
+	}
+	if (PyTuple_Size(object) == 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 (PyTuple_Size(object) == 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 {
+		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;
+	}
+}
+
+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:connect", 
+		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, "imessaging_connect 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)) 
+			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, "imessaging_connect 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;
+
+	struct server_id *p_server_id = talloc(NULL, struct server_id);
+
+	if (num_fds != 0) {
+		DBG_WARNING("Received %zu fds, ignoring message\n", num_fds);
+		return;
+	}
+
+	if (!p_server_id) {
+		PyErr_NoMemory();
+		return;
+	}
+	*p_server_id = server_id;
+
+	if (!PyArg_ParseTuple(callback_and_tuple, "OO",
+			      &callback,
+			      &py_private)) {
+		return;
+	}
+
+	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);
+
+	PyObject_CallFunction(callback, discard_const_p(char, "OiOs#"),
+			      py_private,
+			      msg_type,
+			      py_server_id,
+			      data->data, data->length);
+}
+
+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 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)) {
+		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 };
+
+	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:deregister",
+		discard_const_p(char *, kwnames), &callback, &msg_type)) {
+		return NULL;
+	}
+
+	imessaging_deregister(iface->msg_ctx, msg_type, 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) {
+			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) {
+			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) {
+		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) {
+			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 as 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)\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;
+}