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/*
Unix SMB/CIFS implementation.
Main winbindd server routines
Copyright (C) Stefan Metzmacher 2005
Copyright (C) Andrew Tridgell 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 "lib/socket/socket.h"
#include "lib/util/dlinklist.h"
#include "lib/events/events.h"
#include "smbd/service_task.h"
#include "smbd/process_model.h"
#include "smbd/service_stream.h"
#include "nsswitch/winbind_nss_config.h"
#include "winbind/wb_server.h"
#include "lib/stream/packet.h"
#include "smbd/service.h"
#include "param/secrets.h"
#include "param/param.h"
void wbsrv_terminate_connection(struct wbsrv_connection *wbconn, const char *reason)
{
stream_terminate_connection(wbconn->conn, reason);
}
/*
called on a tcp recv error
*/
static void wbsrv_recv_error(void *private, NTSTATUS status)
{
struct wbsrv_connection *wbconn = talloc_get_type(private, struct wbsrv_connection);
wbsrv_terminate_connection(wbconn, nt_errstr(status));
}
static void wbsrv_accept(struct stream_connection *conn)
{
struct wbsrv_listen_socket *listen_socket = talloc_get_type(conn->private,
struct wbsrv_listen_socket);
struct wbsrv_connection *wbconn;
wbconn = talloc_zero(conn, struct wbsrv_connection);
if (!wbconn) {
stream_terminate_connection(conn, "wbsrv_accept: out of memory");
return;
}
wbconn->conn = conn;
wbconn->listen_socket = listen_socket;
wbconn->lp_ctx = listen_socket->service->task->lp_ctx;
conn->private = wbconn;
wbconn->packet = packet_init(wbconn);
if (wbconn->packet == NULL) {
wbsrv_terminate_connection(wbconn, "wbsrv_accept: out of memory");
return;
}
packet_set_private(wbconn->packet, wbconn);
packet_set_socket(wbconn->packet, conn->socket);
packet_set_callback(wbconn->packet, wbsrv_samba3_process);
packet_set_full_request(wbconn->packet, wbsrv_samba3_packet_full_request);
packet_set_error_handler(wbconn->packet, wbsrv_recv_error);
packet_set_event_context(wbconn->packet, conn->event.ctx);
packet_set_fde(wbconn->packet, conn->event.fde);
packet_set_serialise(wbconn->packet);
}
/*
receive some data on a winbind connection
*/
static void wbsrv_recv(struct stream_connection *conn, uint16_t flags)
{
struct wbsrv_connection *wbconn = talloc_get_type(conn->private,
struct wbsrv_connection);
packet_recv(wbconn->packet);
}
/*
called when we can write to a connection
*/
static void wbsrv_send(struct stream_connection *conn, uint16_t flags)
{
struct wbsrv_connection *wbconn = talloc_get_type(conn->private,
struct wbsrv_connection);
packet_queue_run(wbconn->packet);
}
static const struct stream_server_ops wbsrv_ops = {
.name = "winbind samba3 protocol",
.accept_connection = wbsrv_accept,
.recv_handler = wbsrv_recv,
.send_handler = wbsrv_send
};
/*
startup the winbind task
*/
static void winbind_task_init(struct task_server *task)
{
uint16_t port = 1;
const struct model_ops *model_ops;
NTSTATUS status;
struct wbsrv_service *service;
struct wbsrv_listen_socket *listen_socket;
task_server_set_title(task, "task[winbind]");
/* within the winbind task we want to be a single process, so
ask for the single process model ops and pass these to the
stream_setup_socket() call. */
model_ops = process_model_byname("single");
if (!model_ops) {
task_server_terminate(task,
"Can't find 'single' process model_ops");
return;
}
/* Make sure the directory for the Samba3 socket exists, and is of the correct permissions */
if (!directory_create_or_exist(lp_winbindd_socket_directory(task->lp_ctx), geteuid(), 0755)) {
task_server_terminate(task,
"Cannot create winbindd pipe directory");
return;
}
service = talloc_zero(task, struct wbsrv_service);
if (!service) goto nomem;
service->task = task;
service->primary_sid = secrets_get_domain_sid(service,
task->lp_ctx,
lp_workgroup(task->lp_ctx));
if (service->primary_sid == NULL) {
task_server_terminate(
task, nt_errstr(NT_STATUS_CANT_ACCESS_DOMAIN_INFO));
return;
}
/* setup the unprivileged samba3 socket */
listen_socket = talloc(service, struct wbsrv_listen_socket);
if (!listen_socket) goto nomem;
listen_socket->socket_path = talloc_asprintf(listen_socket, "%s/%s",
lp_winbindd_socket_directory(task->lp_ctx),
WINBINDD_SAMBA3_SOCKET);
if (!listen_socket->socket_path) goto nomem;
listen_socket->service = service;
listen_socket->privileged = false;
status = stream_setup_socket(task->event_ctx, model_ops,
&wbsrv_ops, "unix",
listen_socket->socket_path, &port,
listen_socket);
if (!NT_STATUS_IS_OK(status)) goto listen_failed;
/* setup the privileged samba3 socket */
listen_socket = talloc(service, struct wbsrv_listen_socket);
if (!listen_socket) goto nomem;
listen_socket->socket_path =
smbd_tmp_path(listen_socket, task->lp_ctx,
WINBINDD_SAMBA3_PRIVILEGED_SOCKET);
if (!listen_socket->socket_path) goto nomem;
listen_socket->service = service;
listen_socket->privileged = true;
status = stream_setup_socket(task->event_ctx, model_ops,
&wbsrv_ops, "unix",
listen_socket->socket_path, &port,
listen_socket);
if (!NT_STATUS_IS_OK(status)) goto listen_failed;
status = wbsrv_init_irpc(service);
if (!NT_STATUS_IS_OK(status)) goto irpc_failed;
return;
listen_failed:
DEBUG(0,("stream_setup_socket(path=%s) failed - %s\n",
listen_socket->socket_path, nt_errstr(status)));
task_server_terminate(task, nt_errstr(status));
return;
irpc_failed:
DEBUG(0,("wbsrv_init_irpc() failed - %s\n",
nt_errstr(status)));
task_server_terminate(task, nt_errstr(status));
return;
nomem:
task_server_terminate(task, nt_errstr(NT_STATUS_NO_MEMORY));
return;
}
/*
initialise the winbind server
*/
static NTSTATUS winbind_init(struct event_context *event_ctx,
struct loadparm_context *lp_ctx,
const struct model_ops *model_ops)
{
return task_server_startup(event_ctx, model_ops, winbind_task_init);
}
/*
register ourselves as a available server
*/
NTSTATUS server_service_winbind_init(void)
{
return register_server_service("winbind", winbind_init);
}
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