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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 "includes.h"
#include <Python.h>
#include "scripting/python/modules.h"
#include "libcli/util/pyerrors.h"
#include "librpc/rpc/pyrpc.h"
#include "lib/messaging/irpc.h"
#include "lib/messaging/messaging.h"
#include "lib/events/events.h"
#include "cluster/cluster.h"
#include "param/param.h"
PyAPI_DATA(PyTypeObject) messaging_Type;
PyAPI_DATA(PyTypeObject) irpc_ClientConnectionType;
/* FIXME: This prototype should be in param/pyparam.h */
struct loadparm_context *py_default_loadparm_context(TALLOC_CTX *mem_ctx);
/* FIXME: This prototype should be in py_irpc.h, or shared otherwise */
extern const struct PyNdrRpcMethodDef py_ndr_irpc_methods[];
static bool server_id_from_py(PyObject *object, struct server_id *server_id)
{
if (!PyTuple_Check(object)) {
PyErr_SetString(PyExc_ValueError, "Expected tuple");
return false;
}
if (PyTuple_Size(object) == 3) {
return PyArg_ParseTuple(object, "iii", &server_id->id, &server_id->id2, &server_id->node);
} else {
int id, id2;
if (!PyArg_ParseTuple(object, "ii", &id, &id2))
return false;
*server_id = cluster_id(id, id2);
return true;
}
}
typedef struct {
PyObject_HEAD
TALLOC_CTX *mem_ctx;
struct messaging_context *msg_ctx;
} messaging_Object;
PyObject *py_messaging_connect(PyTypeObject *self, PyObject *args, PyObject *kwargs)
{
struct tevent_context *ev;
const char *kwnames[] = { "own_id", "messaging_path", NULL };
PyObject *own_id = Py_None;
const char *messaging_path = NULL;
messaging_Object *ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|Oz:connect",
discard_const_p(char *, kwnames), &own_id, &messaging_path)) {
return NULL;
}
ret = PyObject_New(messaging_Object, &messaging_Type);
if (ret == NULL)
return NULL;
ret->mem_ctx = talloc_new(NULL);
ev = s4_event_context_init(ret->mem_ctx);
if (messaging_path == NULL) {
messaging_path = lp_messaging_path(ret->mem_ctx,
py_default_loadparm_context(ret->mem_ctx));
} else {
messaging_path = talloc_strdup(ret->mem_ctx, messaging_path);
}
if (own_id != Py_None) {
struct server_id server_id;
if (!server_id_from_py(own_id, &server_id))
return NULL;
ret->msg_ctx = messaging_init(ret->mem_ctx,
messaging_path,
server_id,
py_iconv_convenience(ret->mem_ctx),
ev);
} else {
ret->msg_ctx = messaging_client_init(ret->mem_ctx,
messaging_path,
py_iconv_convenience(ret->mem_ctx),
ev);
}
if (ret->msg_ctx == NULL) {
PyErr_SetString(PyExc_RuntimeError, "messaging_connect unable to create a messaging context");
talloc_free(ret->mem_ctx);
return NULL;
}
return (PyObject *)ret;
}
static void py_messaging_dealloc(PyObject *self)
{
messaging_Object *iface = (messaging_Object *)self;
talloc_free(iface->msg_ctx);
PyObject_Del(self);
}
static PyObject *py_messaging_send(PyObject *self, PyObject *args, PyObject *kwargs)
{
messaging_Object *iface = (messaging_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 };
int 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 = messaging_send(iface->msg_ctx, server, msg_type, &data);
if (NT_STATUS_IS_ERR(status)) {
PyErr_SetNTSTATUS(status);
return NULL;
}
return Py_None;
}
static void py_msg_callback_wrapper(struct messaging_context *msg, void *private,
uint32_t msg_type,
struct server_id server_id, DATA_BLOB *data)
{
PyObject *callback = (PyObject *)private;
PyObject_CallFunction(callback, discard_const_p(char, "i(iii)s#"), msg_type,
server_id.id, server_id.id2, server_id.node,
data->data, data->length);
}
static PyObject *py_messaging_register(PyObject *self, PyObject *args, PyObject *kwargs)
{
messaging_Object *iface = (messaging_Object *)self;
int msg_type = -1;
PyObject *callback;
NTSTATUS status;
const char *kwnames[] = { "callback", "msg_type", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:send",
discard_const_p(char *, kwnames), &callback, &msg_type)) {
return NULL;
}
Py_INCREF(callback);
if (msg_type == -1) {
uint32_t msg_type32 = msg_type;
status = messaging_register_tmp(iface->msg_ctx, callback,
py_msg_callback_wrapper, &msg_type32);
msg_type = msg_type32;
} else {
status = messaging_register(iface->msg_ctx, callback,
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_messaging_deregister(PyObject *self, PyObject *args, PyObject *kwargs)
{
messaging_Object *iface = (messaging_Object *)self;
int msg_type = -1;
PyObject *callback;
const char *kwnames[] = { "callback", "msg_type", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|i:send",
discard_const_p(char *, kwnames), &callback, &msg_type)) {
return NULL;
}
messaging_deregister(iface->msg_ctx, msg_type, callback);
Py_DECREF(callback);
return Py_None;
}
static PyObject *py_messaging_add_name(PyObject *self, PyObject *args, PyObject *kwargs)
{
messaging_Object *iface = (messaging_Object *)self;
NTSTATUS status;
char *name;
const char *kwnames[] = { "name", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|:send",
discard_const_p(char *, kwnames), &name)) {
return NULL;
}
status = irpc_add_name(iface->msg_ctx, name);
if (NT_STATUS_IS_ERR(status)) {
PyErr_SetNTSTATUS(status);
return NULL;
}
return Py_None;
}
static PyObject *py_messaging_remove_name(PyObject *self, PyObject *args, PyObject *kwargs)
{
messaging_Object *iface = (messaging_Object *)self;
char *name;
const char *kwnames[] = { "name", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|:send",
discard_const_p(char *, kwnames), &name)) {
return NULL;
}
irpc_remove_name(iface->msg_ctx, name);
return Py_None;
}
static PyMethodDef py_messaging_methods[] = {
{ "send", (PyCFunction)py_messaging_send, METH_VARARGS|METH_KEYWORDS,
"S.send(target, msg_type, data) -> None\nSend a message" },
{ "register", (PyCFunction)py_messaging_register, METH_VARARGS|METH_KEYWORDS,
"S.register(callback, msg_type=None) -> msg_type\nRegister a message handler" },
{ "deregister", (PyCFunction)py_messaging_deregister, METH_VARARGS|METH_KEYWORDS,
"S.deregister(callback, msg_type) -> None\nDeregister a message handler" },
{ "add_name", (PyCFunction)py_messaging_add_name, METH_VARARGS|METH_KEYWORDS, "S.add_name(name) -> None\nListen on another name" },
{ "remove_name", (PyCFunction)py_messaging_remove_name, METH_VARARGS|METH_KEYWORDS, "S.remove_name(name) -> None\nStop listening on a name" },
{ NULL, NULL, 0, NULL }
};
static PyObject *py_messaging_server_id(PyObject *obj, void *closure)
{
messaging_Object *iface = (messaging_Object *)obj;
struct server_id server_id = messaging_get_server_id(iface->msg_ctx);
return Py_BuildValue("(iii)", server_id.id, server_id.id2,
server_id.node);
}
static PyGetSetDef py_messaging_getset[] = {
{ discard_const_p(char, "server_id"), py_messaging_server_id, NULL,
discard_const_p(char, "local server id") },
{ NULL },
};
PyTypeObject messaging_Type = {
PyObject_HEAD_INIT(NULL) 0,
.tp_name = "irpc.Messaging",
.tp_basicsize = sizeof(messaging_Object),
.tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
.tp_new = py_messaging_connect,
.tp_dealloc = py_messaging_dealloc,
.tp_methods = py_messaging_methods,
.tp_getset = py_messaging_getset,
.tp_doc = "Messaging(own_id=None, messaging_path=None)\n" \
"Create a new object that can be used to communicate with the peers in the specified messaging path.\n" \
"If no path is specified, the default path from smb.conf will be used."
};
/*
state of a irpc 'connection'
*/
typedef struct {
PyObject_HEAD
const char *server_name;
struct server_id *dest_ids;
struct messaging_context *msg_ctx;
TALLOC_CTX *mem_ctx;
} irpc_ClientConnectionObject;
/*
setup a context for talking to a irpc server
example:
status = irpc.connect("smb_server");
*/
PyObject *py_irpc_connect(PyTypeObject *self, PyObject *args, PyObject *kwargs)
{
struct tevent_context *ev;
const char *kwnames[] = { "server", "own_id", "messaging_path", NULL };
char *server;
const char *messaging_path = NULL;
PyObject *own_id = Py_None;
irpc_ClientConnectionObject *ret;
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|Oz:connect",
discard_const_p(char *, kwnames), &server, &own_id, &messaging_path)) {
return NULL;
}
ret = PyObject_New(irpc_ClientConnectionObject, &irpc_ClientConnectionType);
if (ret == NULL)
return NULL;
ret->mem_ctx = talloc_new(NULL);
ret->server_name = server;
ev = s4_event_context_init(ret->mem_ctx);
if (messaging_path == NULL) {
messaging_path = lp_messaging_path(ret->mem_ctx,
py_default_loadparm_context(ret->mem_ctx));
} else {
messaging_path = talloc_strdup(ret->mem_ctx, messaging_path);
}
if (own_id != Py_None) {
struct server_id server_id;
if (!server_id_from_py(own_id, &server_id))
return NULL;
ret->msg_ctx = messaging_init(ret->mem_ctx,
messaging_path,
server_id,
py_iconv_convenience(ret->mem_ctx),
ev);
} else {
ret->msg_ctx = messaging_client_init(ret->mem_ctx,
messaging_path,
py_iconv_convenience(ret->mem_ctx),
ev);
}
if (ret->msg_ctx == NULL) {
PyErr_SetString(PyExc_RuntimeError, "irpc_connect unable to create a messaging context");
talloc_free(ret->mem_ctx);
return NULL;
}
ret->dest_ids = irpc_servers_byname(ret->msg_ctx, ret->mem_ctx, ret->server_name);
if (ret->dest_ids == NULL || ret->dest_ids[0].id == 0) {
talloc_free(ret->mem_ctx);
PyErr_SetNTSTATUS(NT_STATUS_OBJECT_NAME_NOT_FOUND);
return NULL;
} else {
return (PyObject *)ret;
}
}
typedef struct {
PyObject_HEAD
struct irpc_request **reqs;
int count;
int current;
TALLOC_CTX *mem_ctx;
py_data_unpack_fn unpack_fn;
} irpc_ResultObject;
static PyObject *irpc_result_next(irpc_ResultObject *iterator)
{
NTSTATUS status;
if (iterator->current >= iterator->count) {
PyErr_SetString(PyExc_StopIteration, "No more results");
return NULL;
}
status = irpc_call_recv(iterator->reqs[iterator->current]);
iterator->current++;
if (!NT_STATUS_IS_OK(status)) {
PyErr_SetNTSTATUS(status);
return NULL;
}
return iterator->unpack_fn(iterator->reqs[iterator->current-1]->r);
}
static PyObject *irpc_result_len(irpc_ResultObject *self)
{
return PyLong_FromLong(self->count);
}
static PyMethodDef irpc_result_methods[] = {
{ "__len__", (PyCFunction)irpc_result_len, METH_NOARGS,
"Number of elements returned"},
{ NULL }
};
static void irpc_result_dealloc(PyObject *self)
{
talloc_free(((irpc_ResultObject *)self)->mem_ctx);
PyObject_Del(self);
}
PyTypeObject irpc_ResultIteratorType = {
PyObject_HEAD_INIT(NULL) 0,
.tp_name = "irpc.ResultIterator",
.tp_basicsize = sizeof(irpc_ResultObject),
.tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
.tp_iternext = (iternextfunc)irpc_result_next,
.tp_iter = PyObject_SelfIter,
.tp_methods = irpc_result_methods,
.tp_dealloc = irpc_result_dealloc,
};
static PyObject *py_irpc_call(irpc_ClientConnectionObject *p, struct PyNdrRpcMethodDef *method_def, PyObject *args, PyObject *kwargs)
{
void *ptr;
struct irpc_request **reqs;
int i, count;
NTSTATUS status;
TALLOC_CTX *mem_ctx = talloc_new(NULL);
irpc_ResultObject *ret;
/* allocate the C structure */
ptr = talloc_zero_size(mem_ctx, method_def->table->calls[method_def->opnum].struct_size);
if (ptr == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
/* convert the mpr object into a C structure */
if (!method_def->pack_in_data(args, kwargs, ptr)) {
talloc_free(mem_ctx);
return NULL;
}
for (count=0;p->dest_ids[count].id;count++) /* noop */ ;
/* we need to make a call per server */
reqs = talloc_array(mem_ctx, struct irpc_request *, count);
if (reqs == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
/* make the actual calls */
for (i=0;i<count;i++) {
reqs[i] = irpc_call_send(p->msg_ctx, p->dest_ids[i],
method_def->table, method_def->opnum, ptr, ptr);
if (reqs[i] == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
talloc_steal(reqs, reqs[i]);
}
ret = PyObject_New(irpc_ResultObject, &irpc_ResultIteratorType);
ret->mem_ctx = mem_ctx;
ret->reqs = reqs;
ret->count = count;
ret->current = 0;
ret->unpack_fn = method_def->unpack_out_data;
return (PyObject *)ret;
done:
talloc_free(mem_ctx);
PyErr_SetNTSTATUS(status);
return NULL;
}
static PyObject *py_irpc_call_wrapper(PyObject *self, PyObject *args, void *wrapped, PyObject *kwargs)
{
irpc_ClientConnectionObject *iface = (irpc_ClientConnectionObject *)self;
struct PyNdrRpcMethodDef *md = wrapped;
return py_irpc_call(iface, md, args, kwargs);
}
static void py_irpc_dealloc(PyObject *self)
{
irpc_ClientConnectionObject *iface = (irpc_ClientConnectionObject *)self;
talloc_free(iface->mem_ctx);
PyObject_Del(self);
}
PyTypeObject irpc_ClientConnectionType = {
PyObject_HEAD_INIT(NULL) 0,
.tp_name = "irpc.ClientConnection",
.tp_basicsize = sizeof(irpc_ClientConnectionObject),
.tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
.tp_new = py_irpc_connect,
.tp_dealloc = py_irpc_dealloc,
.tp_doc = "ClientConnection(server, own_id=None, messaging_path=None)\n" \
"Create a new IRPC client connection to communicate with the servers in the specified path.\n" \
"If no path is specified, the default path from smb.conf will be used."
};
static bool irpc_AddNdrRpcMethods(PyTypeObject *ifacetype, const struct PyNdrRpcMethodDef *mds)
{
int i;
for (i = 0; mds[i].name; i++) {
PyObject *ret;
struct wrapperbase *wb = calloc(sizeof(struct wrapperbase), 1);
wb->name = discard_const_p(char, mds[i].name);
wb->flags = PyWrapperFlag_KEYWORDS;
wb->wrapper = (wrapperfunc)py_irpc_call_wrapper;
wb->doc = discard_const_p(char, mds[i].doc);
ret = PyDescr_NewWrapper(ifacetype, wb, discard_const_p(void, &mds[i]));
PyDict_SetItemString(ifacetype->tp_dict, mds[i].name,
(PyObject *)ret);
}
return true;
}
void initmessaging(void)
{
PyObject *mod;
PyObject *dep_irpc;
dep_irpc = PyImport_ImportModule("samba.dcerpc.irpc");
if (dep_irpc == NULL)
return;
if (PyType_Ready(&irpc_ClientConnectionType) < 0)
return;
if (PyType_Ready(&messaging_Type) < 0)
return;
if (PyType_Ready(&irpc_ResultIteratorType) < 0)
return;
if (!irpc_AddNdrRpcMethods(&irpc_ClientConnectionType, py_ndr_irpc_methods))
return;
mod = Py_InitModule3("messaging", NULL, "Internal RPC");
if (mod == NULL)
return;
Py_INCREF((PyObject *)&irpc_ClientConnectionType);
PyModule_AddObject(mod, "ClientConnection", (PyObject *)&irpc_ClientConnectionType);
Py_INCREF((PyObject *)&messaging_Type);
PyModule_AddObject(mod, "Messaging", (PyObject *)&messaging_Type);
}
|