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/*
Unix SMB/CIFS implementation.
smbd-specific dcerpc server code
Copyright (C) Andrew Tridgell 2003-2005
Copyright (C) Stefan (metze) Metzmacher 2004-2005
Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2004,2007
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 "librpc/gen_ndr/ndr_dcerpc.h"
#include "auth/auth.h"
#include "../lib/util/dlinklist.h"
#include "rpc_server/dcerpc_server.h"
#include "rpc_server/dcerpc_server_proto.h"
#include "librpc/rpc/dcerpc.h"
#include "system/filesys.h"
#include "lib/messaging/irpc.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "param/param.h"
#include "../lib/tsocket/tsocket.h"
#include "librpc/rpc/dcerpc_proto.h"
#include "../lib/util/tevent_ntstatus.h"
#include "libcli/raw/smb.h"
#include "samba/process_model.h"
static void skip_become_root(void)
{
}
static void skip_unbecome_root(void)
{
}
static struct dcesrv_context_callbacks srv_callbacks = {
.log.successful_authz = log_successful_dcesrv_authz_event,
.auth.gensec_prepare = dcesrv_gensec_prepare,
.auth.become_root = skip_become_root,
.auth.unbecome_root = skip_unbecome_root,
.assoc_group.find = dcesrv_assoc_group_find_s4,
};
/*
* Need to run the majority of the RPC endpoints in a single process to allow
* for shared handles, and the sharing of ldb contexts.
*
* However other endpoints are capable of being run in multiple processes
* e.g. NETLOGON.
*
* To support this the process model is manipulated to force those end points
* not supporting multiple processes into the single process model. The code
* responsible for this is in dcesrv_init_endpoints
*
*/
NTSTATUS server_service_rpc_init(TALLOC_CTX *);
/*
* Initialise the rpc endpoints.
*/
static NTSTATUS dcesrv_init_endpoints(struct task_server *task,
struct dcesrv_context *dce_ctx,
bool use_single_process)
{
struct dcesrv_endpoint *e;
const struct model_ops *model_ops = NULL;
/*
* For those RPC services that run with shared context we need to
* ensure that they don't fork a new process on accept (standard_model).
* And as there is only one process handling these requests we need
* to handle accept errors in a similar manner to the single process
* model.
*
* To do this we override the process model operations with the single
* process operations. This is not the most elegant solution, but it is
* the least ugly, and is confined to the next block of code.
*/
if (use_single_process) {
model_ops = process_model_startup("single");
if (model_ops == NULL) {
DBG_ERR("Unable to load single process model\n");
return NT_STATUS_INTERNAL_ERROR;
}
} else {
model_ops = task->model_ops;
}
for (e = dce_ctx->endpoint_list; e; e = e->next) {
enum dcerpc_transport_t transport =
dcerpc_binding_get_transport(e->ep_description);
if (transport == NCACN_HTTP) {
/*
* We don't support ncacn_http yet
*/
continue;
}
if (e->use_single_process == use_single_process) {
NTSTATUS status;
status = dcesrv_add_ep(dce_ctx,
task->lp_ctx,
e,
task->event_ctx,
model_ops,
task->process_context);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
}
return NT_STATUS_OK;
}
/*
* Initialise the RPC service.
* And those end points that can be serviced by multiple processes.
* The endpoints that need to be run in a single process are setup in the
* post_fork hook.
*/
static NTSTATUS dcesrv_task_init(struct task_server *task)
{
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
struct dcesrv_context *dce_ctx;
const char **ep_servers = NULL;
dcerpc_server_init(task->lp_ctx);
task_server_set_title(task, "task[dcesrv]");
status = dcesrv_init_context(task->event_ctx,
task->lp_ctx,
&srv_callbacks,
&dce_ctx);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ep_servers = lpcfg_dcerpc_endpoint_servers(task->lp_ctx);
status = dcesrv_init_ep_servers(dce_ctx, ep_servers);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* Make sure the directory for NCALRPC exists */
if (!directory_exist(lpcfg_ncalrpc_dir(task->lp_ctx))) {
int ret;
ret = mkdir(lpcfg_ncalrpc_dir(task->lp_ctx), 0755);
if (ret == -1 && errno != EEXIST) {
return map_nt_error_from_unix_common(errno);
}
}
status = dcesrv_init_endpoints(task, dce_ctx, false);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
task->private_data = dce_ctx;
return NT_STATUS_OK;
}
/*
* Initialise the endpoints that need to run in a single process fork.
* The endpoint registration is only done for the first process instance.
*
*/
static void dcesrv_post_fork(struct task_server *task,
struct process_details *pd)
{
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
struct dcesrv_context *dce_ctx;
if (task->private_data == NULL) {
task_server_terminate(task, "dcerpc: No dcesrv_context", true);
return;
}
dce_ctx =
talloc_get_type_abort(task->private_data, struct dcesrv_context);
/*
* Ensure the single process endpoints are only available to the
* first instance.
*/
if (pd->instances == 0) {
status = dcesrv_init_endpoints(task, dce_ctx, true);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(
task,
"dcerpc: Failed to initialise end points",
true);
return;
}
}
irpc_add_name(task->msg_ctx, "rpc_server");
}
NTSTATUS server_service_rpc_init(TALLOC_CTX *ctx)
{
static const struct service_details details = {
.inhibit_fork_on_accept = false,
.inhibit_pre_fork = false,
.task_init = dcesrv_task_init,
.post_fork = dcesrv_post_fork};
return register_server_service(ctx, "rpc", &details);
}
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