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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 "auth/gensec/gensec.h"
#include "lib/util/dlinklist.h"
#include "rpc_server/dcerpc_server.h"
#include "lib/events/events.h"
#include "smbd/service_task.h"
#include "smbd/service_stream.h"
#include "smbd/service.h"
#include "system/filesys.h"
#include "libcli/security/security.h"
#include "lib/socket/socket.h"
#include "lib/messaging/irpc.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "param/param.h"
struct dcesrv_socket_context {
const struct dcesrv_endpoint *endpoint;
struct dcesrv_context *dcesrv_ctx;
};
/*
write_fn callback for dcesrv_output()
*/
static NTSTATUS dcerpc_write_fn(void *private_data, DATA_BLOB *out, size_t *nwritten)
{
NTSTATUS status;
struct socket_context *sock = talloc_get_type(private_data, struct socket_context);
size_t sendlen;
status = socket_send(sock, out, &sendlen);
NT_STATUS_IS_ERR_RETURN(status);
*nwritten = sendlen;
return status;
}
static void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
{
struct stream_connection *srv_conn;
srv_conn = talloc_get_type(dce_conn->transport.private_data,
struct stream_connection);
stream_terminate_connection(srv_conn, reason);
}
static void dcesrv_sock_report_output_data(struct dcesrv_connection *dcesrv_conn)
{
struct stream_connection *srv_conn;
srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
struct stream_connection);
if (srv_conn && srv_conn->event.fde) {
EVENT_FD_WRITEABLE(srv_conn->event.fde);
}
}
static struct socket_address *dcesrv_sock_get_my_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
{
struct stream_connection *srv_conn;
srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
struct stream_connection);
return socket_get_my_addr(srv_conn->socket, mem_ctx);
}
static struct socket_address *dcesrv_sock_get_peer_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
{
struct stream_connection *srv_conn;
srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
struct stream_connection);
return socket_get_peer_addr(srv_conn->socket, mem_ctx);
}
static void dcesrv_sock_accept(struct stream_connection *srv_conn)
{
NTSTATUS status;
struct dcesrv_socket_context *dcesrv_sock =
talloc_get_type(srv_conn->private, struct dcesrv_socket_context);
struct dcesrv_connection *dcesrv_conn = NULL;
struct auth_session_info *session_info = NULL;
status = auth_anonymous_session_info(srv_conn, dcesrv_sock->dcesrv_ctx->lp_ctx, &session_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("dcesrv_sock_accept: auth_anonymous_session_info failed: %s\n",
nt_errstr(status)));
stream_terminate_connection(srv_conn, nt_errstr(status));
return;
}
status = dcesrv_endpoint_connect(dcesrv_sock->dcesrv_ctx,
srv_conn,
dcesrv_sock->endpoint,
session_info,
srv_conn->event.ctx,
srv_conn->msg_ctx,
srv_conn->server_id,
DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
&dcesrv_conn);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("dcesrv_sock_accept: dcesrv_endpoint_connect failed: %s\n",
nt_errstr(status)));
stream_terminate_connection(srv_conn, nt_errstr(status));
return;
}
dcesrv_conn->transport.private_data = srv_conn;
dcesrv_conn->transport.report_output_data = dcesrv_sock_report_output_data;
dcesrv_conn->transport.get_my_addr = dcesrv_sock_get_my_addr;
dcesrv_conn->transport.get_peer_addr = dcesrv_sock_get_peer_addr;
srv_conn->private = dcesrv_conn;
irpc_add_name(srv_conn->msg_ctx, "rpc_server");
return;
}
static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags)
{
NTSTATUS status;
struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
DATA_BLOB tmp_blob;
size_t nread;
if (dce_conn->processing) {
EVENT_FD_NOT_READABLE(conn->event.fde);
return;
}
tmp_blob = data_blob_talloc(conn->socket, NULL, 0x1000);
if (tmp_blob.data == NULL) {
dcesrv_terminate_connection(dce_conn, "out of memory");
return;
}
status = socket_recv(conn->socket, tmp_blob.data, tmp_blob.length, &nread);
if (NT_STATUS_IS_ERR(status)) {
dcesrv_terminate_connection(dce_conn, nt_errstr(status));
return;
}
if (nread == 0) {
talloc_free(tmp_blob.data);
return;
}
tmp_blob.length = nread;
dce_conn->processing = true;
status = dcesrv_input(dce_conn, &tmp_blob);
dce_conn->processing = false;
talloc_free(tmp_blob.data);
EVENT_FD_READABLE(conn->event.fde);
if (!NT_STATUS_IS_OK(status)) {
dcesrv_terminate_connection(dce_conn, nt_errstr(status));
return;
}
if (dce_conn->call_list && dce_conn->call_list->replies) {
EVENT_FD_WRITEABLE(conn->event.fde);
}
}
static void dcesrv_sock_send(struct stream_connection *conn, uint16_t flags)
{
struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
NTSTATUS status;
status = dcesrv_output(dce_conn, conn->socket, dcerpc_write_fn);
if (NT_STATUS_IS_ERR(status)) {
dcesrv_terminate_connection(dce_conn, "eof on socket");
return;
}
if (!dce_conn->call_list || !dce_conn->call_list->replies) {
EVENT_FD_NOT_WRITEABLE(conn->event.fde);
}
}
static const struct stream_server_ops dcesrv_stream_ops = {
.name = "rpc",
.accept_connection = dcesrv_sock_accept,
.recv_handler = dcesrv_sock_recv,
.send_handler = dcesrv_sock_send,
};
static NTSTATUS dcesrv_add_ep_unix(struct dcesrv_context *dce_ctx,
struct loadparm_context *lp_ctx,
struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
struct dcesrv_socket_context *dcesrv_sock;
uint16_t port = 1;
NTSTATUS status;
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
dcesrv_sock->endpoint = e;
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
status = stream_setup_socket(event_ctx, lp_ctx,
model_ops, &dcesrv_stream_ops,
"unix", e->ep_description->endpoint, &port,
lp_socket_options(lp_ctx),
dcesrv_sock);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
e->ep_description->endpoint, nt_errstr(status)));
}
return status;
}
static NTSTATUS dcesrv_add_ep_ncalrpc(struct dcesrv_context *dce_ctx,
struct loadparm_context *lp_ctx,
struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
struct dcesrv_socket_context *dcesrv_sock;
uint16_t port = 1;
char *full_path;
NTSTATUS status;
if (!e->ep_description->endpoint) {
/* No identifier specified: use DEFAULT.
* DO NOT hardcode this value anywhere else. Rather, specify
* no endpoint and let the epmapper worry about it. */
e->ep_description->endpoint = talloc_strdup(dce_ctx, "DEFAULT");
}
full_path = talloc_asprintf(dce_ctx, "%s/%s", lp_ncalrpc_dir(lp_ctx),
e->ep_description->endpoint);
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
dcesrv_sock->endpoint = e;
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
status = stream_setup_socket(event_ctx, lp_ctx,
model_ops, &dcesrv_stream_ops,
"unix", full_path, &port,
lp_socket_options(lp_ctx),
dcesrv_sock);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(identifier=%s,path=%s) failed - %s\n",
e->ep_description->endpoint, full_path, nt_errstr(status)));
}
return status;
}
/*
add a socket address to the list of events, one event per dcerpc endpoint
*/
static NTSTATUS add_socket_rpc_pipe_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
struct dcesrv_socket_context *dcesrv_sock;
NTSTATUS status;
if (e->ep_description->endpoint == NULL) {
DEBUG(0, ("Endpoint mandatory for named pipes\n"));
return NT_STATUS_INVALID_PARAMETER;
}
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
dcesrv_sock->endpoint = e;
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
status = NT_STATUS_OK;
#if 0
status = stream_setup_smb_pipe(event_ctx, model_ops, &dcesrv_stream_ops,
e->ep_description->endpoint, dcesrv_sock);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
e->ep_description->endpoint, nt_errstr(status)));
}
#endif
return status;
}
static NTSTATUS dcesrv_add_ep_np(struct dcesrv_context *dce_ctx,
struct loadparm_context *lp_ctx,
struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
NTSTATUS status;
status = add_socket_rpc_pipe_iface(dce_ctx, e, event_ctx, model_ops);
NT_STATUS_NOT_OK_RETURN(status);
return status;
}
/*
add a socket address to the list of events, one event per dcerpc endpoint
*/
static NTSTATUS add_socket_rpc_tcp_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops,
const char *address)
{
struct dcesrv_socket_context *dcesrv_sock;
uint16_t port = 0;
NTSTATUS status;
if (e->ep_description->endpoint) {
port = atoi(e->ep_description->endpoint);
}
dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
/* remember the endpoint of this socket */
dcesrv_sock->endpoint = e;
dcesrv_sock->dcesrv_ctx = talloc_reference(dcesrv_sock, dce_ctx);
status = stream_setup_socket(event_ctx, dce_ctx->lp_ctx,
model_ops, &dcesrv_stream_ops,
"ipv4", address, &port,
lp_socket_options(dce_ctx->lp_ctx),
dcesrv_sock);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("service_setup_stream_socket(address=%s,port=%u) failed - %s\n",
address, port, nt_errstr(status)));
}
if (e->ep_description->endpoint == NULL) {
e->ep_description->endpoint = talloc_asprintf(dce_ctx, "%d", port);
}
return status;
}
static NTSTATUS dcesrv_add_ep_tcp(struct dcesrv_context *dce_ctx,
struct loadparm_context *lp_ctx,
struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
NTSTATUS status;
/* Add TCP/IP sockets */
if (lp_interfaces(lp_ctx) && lp_bind_interfaces_only(lp_ctx)) {
int num_interfaces;
int i;
struct interface *ifaces;
load_interfaces(dce_ctx, lp_interfaces(lp_ctx), &ifaces);
num_interfaces = iface_count(ifaces);
for(i = 0; i < num_interfaces; i++) {
const char *address = iface_n_ip(ifaces, i);
status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops, address);
NT_STATUS_NOT_OK_RETURN(status);
}
} else {
status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops,
lp_socket_address(lp_ctx));
NT_STATUS_NOT_OK_RETURN(status);
}
return NT_STATUS_OK;
}
static NTSTATUS dcesrv_add_ep(struct dcesrv_context *dce_ctx,
struct loadparm_context *lp_ctx,
struct dcesrv_endpoint *e,
struct event_context *event_ctx, const struct model_ops *model_ops)
{
switch (e->ep_description->transport) {
case NCACN_UNIX_STREAM:
return dcesrv_add_ep_unix(dce_ctx, lp_ctx, e, event_ctx, model_ops);
case NCALRPC:
return dcesrv_add_ep_ncalrpc(dce_ctx, lp_ctx, e, event_ctx, model_ops);
case NCACN_IP_TCP:
return dcesrv_add_ep_tcp(dce_ctx, lp_ctx, e, event_ctx, model_ops);
case NCACN_NP:
return dcesrv_add_ep_np(dce_ctx, lp_ctx, e, event_ctx, model_ops);
default:
return NT_STATUS_NOT_SUPPORTED;
}
}
/*
open the dcerpc server sockets
*/
static void dcesrv_task_init(struct task_server *task)
{
NTSTATUS status;
struct dcesrv_context *dce_ctx;
struct dcesrv_endpoint *e;
task_server_set_title(task, "task[dcesrv]");
status = dcesrv_init_context(task->event_ctx,
task->lp_ctx,
lp_dcerpc_endpoint_servers(task->lp_ctx),
&dce_ctx);
if (!NT_STATUS_IS_OK(status)) goto failed;
/* Make sure the directory for NCALRPC exists */
if (!directory_exist(lp_ncalrpc_dir(task->lp_ctx))) {
mkdir(lp_ncalrpc_dir(task->lp_ctx), 0755);
}
for (e=dce_ctx->endpoint_list;e;e=e->next) {
status = dcesrv_add_ep(dce_ctx, task->lp_ctx, e, task->event_ctx, task->model_ops);
if (!NT_STATUS_IS_OK(status)) goto failed;
}
return;
failed:
task_server_terminate(task, "Failed to startup dcerpc server task");
}
NTSTATUS server_service_rpc_init(void)
{
extern NTSTATUS dcerpc_server_wkssvc_init(void);
extern NTSTATUS dcerpc_server_drsuapi_init(void);
extern NTSTATUS dcerpc_server_winreg_init(void);
extern NTSTATUS dcerpc_server_spoolss_init(void);
extern NTSTATUS dcerpc_server_epmapper_init(void);
extern NTSTATUS dcerpc_server_srvsvc_init(void);
extern NTSTATUS dcerpc_server_netlogon_init(void);
extern NTSTATUS dcerpc_server_rpcecho_init(void);
extern NTSTATUS dcerpc_server_unixinfo_init(void);
extern NTSTATUS dcerpc_server_samr_init(void);
extern NTSTATUS dcerpc_server_remote_init(void);
extern NTSTATUS dcerpc_server_lsa_init(void);
init_module_fn static_init[] = { STATIC_DCESRV_MODULES };
init_module_fn *shared_init = load_samba_modules(NULL, global_loadparm, "dcerpc_server");
run_init_functions(static_init);
run_init_functions(shared_init);
talloc_free(shared_init);
return register_server_service("rpc", dcesrv_task_init);
}
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