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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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "lib/socket/socket.h"
#include "system/dir.h"
#include "system/filesys.h"
#include "dlinklist.h"
#include "lib/events/events.h"
#include "smbd/service_task.h"
#include "smbd/service_stream.h"
#define WINBINDD_DIR "/tmp/.winbindd/"
#define WINBINDD_ECHO_SOCKET WINBINDD_DIR"echo"
#define WINBINDD_ADDR_PREFIX "127.0.255."
#define WINBINDD_ECHO_ADDR WINBINDD_ADDR_PREFIX"1"
#define WINBINDD_ECHO_PORT 55555
/*
state of an open winbind connection
*/
struct wbserver_connection {
DATA_BLOB blob;
struct send_queue {
struct send_queue *next, *prev;
DATA_BLOB blob;
} *queue;
};
/*
called when we get a new connection
*/
static void winbind_accept(struct stream_connection *conn)
{
struct wbserver_connection *wbconn;
wbconn = talloc_zero(conn, struct wbserver_connection);
wbconn->blob = data_blob_talloc(wbconn, NULL, 1024);
conn->private = wbconn;
}
/*
receive some data on a winbind connection
*/
static void winbind_recv(struct stream_connection *conn, uint16_t flags)
{
struct wbserver_connection *wbconn = talloc_get_type(conn->private, struct wbserver_connection);
NTSTATUS status;
size_t nread;
struct send_queue *q;
status = socket_recv(conn->socket, wbconn->blob.data, wbconn->blob.length, &nread, 0);
if (NT_STATUS_IS_ERR(status)) {
DEBUG(10,("socket_recv: %s\n",nt_errstr(status)));
stream_terminate_connection(conn, "socket_recv: failed\n");
return;
}
/* just reflect the data back down the socket */
q = talloc(wbconn, struct send_queue);
if (q == NULL) {
stream_terminate_connection(conn, "winbind_recv: out of memory\n");
return;
}
q->blob = data_blob_talloc(q, wbconn->blob.data, nread);
if (q->blob.data == NULL) {
stream_terminate_connection(conn, "winbind_recv: out of memory\n");
return;
}
DLIST_ADD_END(wbconn->queue, q, struct send_queue *);
EVENT_FD_WRITEABLE(conn->event.fde);
}
/*
called when we can write to a connection
*/
static void winbind_send(struct stream_connection *conn, uint16_t flags)
{
struct wbserver_connection *wbconn = talloc_get_type(conn->private, struct wbserver_connection);
while (wbconn->queue) {
struct send_queue *q = wbconn->queue;
NTSTATUS status;
size_t sendlen;
status = socket_send(conn->socket, &q->blob, &sendlen, 0);
if (NT_STATUS_IS_ERR(status)) {
DEBUG(10,("socket_send() %s\n",nt_errstr(status)));
stream_terminate_connection(conn, "socket_send: failed\n");
return;
}
if (!NT_STATUS_IS_OK(status)) {
return;
}
q->blob.length -= sendlen;
q->blob.data += sendlen;
if (q->blob.length == 0) {
DLIST_REMOVE(wbconn->queue, q);
talloc_free(q);
}
}
EVENT_FD_NOT_WRITEABLE(conn->event.fde);
}
static const struct stream_server_ops winbind_stream_ops = {
.name = "winbind_echo",
.accept_connection = winbind_accept,
.recv_handler = winbind_recv,
.send_handler = winbind_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;
/* 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_terminate(task, "Can't find 'single' process model_ops");
return;
}
/* Make sure the directory for NCALRPC exists */
if (!directory_exist(WINBINDD_DIR)) {
mkdir(WINBINDD_DIR, 0755);
}
status = stream_setup_socket(task->event_ctx, model_ops, &winbind_stream_ops,
"unix", WINBINDD_ECHO_SOCKET, &port, NULL);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
WINBINDD_ECHO_SOCKET, nt_errstr(status)));
task_terminate(task, "winbind Failed to find to ECHO unix socket");
return;
}
port = WINBINDD_ECHO_PORT;
status = stream_setup_socket(task->event_ctx, model_ops, &winbind_stream_ops,
"ipv4", WINBINDD_ECHO_ADDR, &port, NULL);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(address=%s,port=%u) failed - %s\n",
WINBINDD_ECHO_ADDR, port, nt_errstr(status)));
task_terminate(task, "winbind Failed to find to ECHO tcp socket");
return;
}
}
/*
initialise the winbind server
*/
static NTSTATUS winbind_init(struct event_context *event_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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