2 Unix SMB/CIFS implementation.
3 remote dcerpc operations
5 Copyright (C) Stefan (metze) Metzmacher 2004
6 Copyright (C) Julien Kerihuel 2008-2009
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2010
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "rpc_server/dcerpc_server.h"
25 #include "auth/auth.h"
26 #include "auth/credentials/credentials.h"
27 #include "librpc/ndr/ndr_table.h"
28 #include "param/param.h"
31 struct dcesrv_remote_private
{
32 struct dcerpc_pipe
*c_pipe
;
35 static NTSTATUS
remote_op_reply(struct dcesrv_call_state
*dce_call
, TALLOC_CTX
*mem_ctx
, void *r
)
40 static NTSTATUS
remote_op_bind(struct dcesrv_call_state
*dce_call
, const struct dcesrv_interface
*iface
, uint32_t if_version
)
43 const struct ndr_interface_table
*table
;
44 struct dcesrv_remote_private
*priv
;
45 const char *binding
= lp_parm_string(dce_call
->conn
->dce_ctx
->lp_ctx
, NULL
, "dcerpc_remote", "binding");
46 const char *user
, *pass
, *domain
;
47 struct cli_credentials
*credentials
;
48 bool must_free_credentials
= true;
50 struct dcerpc_binding
*b
;
51 struct composite_context
*pipe_conn_req
;
53 machine_account
= lp_parm_bool(dce_call
->conn
->dce_ctx
->lp_ctx
, NULL
, "dcerpc_remote", "use_machine_account", false);
55 priv
= talloc(dce_call
->conn
, struct dcesrv_remote_private
);
57 return NT_STATUS_NO_MEMORY
;
61 dce_call
->context
->private_data
= priv
;
64 DEBUG(0,("You must specify a DCE/RPC binding string\n"));
65 return NT_STATUS_INVALID_PARAMETER
;
68 user
= lp_parm_string(dce_call
->conn
->dce_ctx
->lp_ctx
, NULL
, "dcerpc_remote", "user");
69 pass
= lp_parm_string(dce_call
->conn
->dce_ctx
->lp_ctx
, NULL
, "dcerpc_remote", "password");
70 domain
= lp_parm_string(dce_call
->conn
->dce_ctx
->lp_ctx
, NULL
, "dceprc_remote", "domain");
72 table
= ndr_table_by_uuid(&iface
->syntax_id
.uuid
); /* FIXME: What about if_version ? */
74 dce_call
->fault_code
= DCERPC_FAULT_UNK_IF
;
75 return NT_STATUS_NET_WRITE_FAULT
;
79 DEBUG(5, ("dcerpc_remote: RPC Proxy: Using specified account\n"));
80 credentials
= cli_credentials_init(priv
);
82 return NT_STATUS_NO_MEMORY
;
84 cli_credentials_set_conf(credentials
, dce_call
->conn
->dce_ctx
->lp_ctx
);
85 cli_credentials_set_username(credentials
, user
, CRED_SPECIFIED
);
87 cli_credentials_set_domain(credentials
, domain
, CRED_SPECIFIED
);
89 cli_credentials_set_password(credentials
, pass
, CRED_SPECIFIED
);
90 } else if (machine_account
) {
91 DEBUG(5, ("dcerpc_remote: RPC Proxy: Using machine account\n"));
92 credentials
= cli_credentials_init(priv
);
93 cli_credentials_set_conf(credentials
, dce_call
->conn
->dce_ctx
->lp_ctx
);
95 cli_credentials_set_domain(credentials
, domain
, CRED_SPECIFIED
);
97 status
= cli_credentials_set_machine_account(credentials
, dce_call
->conn
->dce_ctx
->lp_ctx
);
98 if (!NT_STATUS_IS_OK(status
)) {
101 } else if (dce_call
->conn
->auth_state
.session_info
->credentials
) {
102 DEBUG(5, ("dcerpc_remote: RPC Proxy: Using delegated credentials\n"));
103 credentials
= dce_call
->conn
->auth_state
.session_info
->credentials
;
104 must_free_credentials
= false;
106 DEBUG(1,("dcerpc_remote: RPC Proxy: You must supply binding, user and password or have delegated credentials\n"));
107 return NT_STATUS_INVALID_PARAMETER
;
110 /* parse binding string to the structure */
111 status
= dcerpc_parse_binding(dce_call
->context
, binding
, &b
);
112 if (!NT_STATUS_IS_OK(status
)) {
113 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding
));
117 DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(dce_call
->context
, b
)));
119 /* If we already have a remote association group ID, then use that */
120 if (dce_call
->context
->assoc_group
->proxied_id
!= 0) {
121 b
->assoc_group_id
= dce_call
->context
->assoc_group
->proxied_id
;
124 b
->object
.if_version
= if_version
;
126 pipe_conn_req
= dcerpc_pipe_connect_b_send(dce_call
->context
, b
, table
,
127 credentials
, dce_call
->event_ctx
, dce_call
->conn
->dce_ctx
->lp_ctx
);
128 status
= dcerpc_pipe_connect_b_recv(pipe_conn_req
, dce_call
->context
, &(priv
->c_pipe
));
130 if (must_free_credentials
) {
131 talloc_free(credentials
);
134 if (!NT_STATUS_IS_OK(status
)) {
138 if (dce_call
->context
->assoc_group
->proxied_id
== 0) {
139 dce_call
->context
->assoc_group
->proxied_id
= priv
->c_pipe
->assoc_group_id
;
142 if (!NT_STATUS_IS_OK(status
)) {
149 static void remote_op_unbind(struct dcesrv_connection_context
*context
, const struct dcesrv_interface
*iface
)
151 struct dcesrv_remote_private
*priv
= (struct dcesrv_remote_private
*)context
->private_data
;
153 talloc_free(priv
->c_pipe
);
158 static NTSTATUS
remote_op_ndr_pull(struct dcesrv_call_state
*dce_call
, TALLOC_CTX
*mem_ctx
, struct ndr_pull
*pull
, void **r
)
160 enum ndr_err_code ndr_err
;
161 const struct ndr_interface_table
*table
= (const struct ndr_interface_table
*)dce_call
->context
->iface
->private_data
;
162 uint16_t opnum
= dce_call
->pkt
.u
.request
.opnum
;
164 dce_call
->fault_code
= 0;
166 if (opnum
>= table
->num_calls
) {
167 dce_call
->fault_code
= DCERPC_FAULT_OP_RNG_ERROR
;
168 return NT_STATUS_NET_WRITE_FAULT
;
171 *r
= talloc_size(mem_ctx
, table
->calls
[opnum
].struct_size
);
173 return NT_STATUS_NO_MEMORY
;
176 /* unravel the NDR for the packet */
177 ndr_err
= table
->calls
[opnum
].ndr_pull(pull
, NDR_IN
, *r
);
178 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
179 dcerpc_log_packet(dce_call
->conn
->packet_log_dir
,
180 table
, opnum
, NDR_IN
,
181 &dce_call
->pkt
.u
.request
.stub_and_verifier
);
182 dce_call
->fault_code
= DCERPC_FAULT_NDR
;
183 return NT_STATUS_NET_WRITE_FAULT
;
189 static NTSTATUS
remote_op_dispatch(struct dcesrv_call_state
*dce_call
, TALLOC_CTX
*mem_ctx
, void *r
)
191 struct dcesrv_remote_private
*priv
= dce_call
->context
->private_data
;
192 uint16_t opnum
= dce_call
->pkt
.u
.request
.opnum
;
193 const struct ndr_interface_table
*table
= dce_call
->context
->iface
->private_data
;
194 const struct ndr_interface_call
*call
;
197 name
= table
->calls
[opnum
].name
;
198 call
= &table
->calls
[opnum
];
200 if (priv
->c_pipe
->conn
->flags
& DCERPC_DEBUG_PRINT_IN
) {
201 ndr_print_function_debug(call
->ndr_print
, name
, NDR_IN
| NDR_SET_VALUES
, r
);
204 priv
->c_pipe
->conn
->flags
|= DCERPC_NDR_REF_ALLOC
;
206 /* we didn't use the return code of this function as we only check the last_fault_code */
207 dcerpc_ndr_request(priv
->c_pipe
, NULL
, table
, opnum
, mem_ctx
,r
);
209 dce_call
->fault_code
= priv
->c_pipe
->last_fault_code
;
210 if (dce_call
->fault_code
!= 0) {
211 DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",name
, dcerpc_errstr(mem_ctx
, dce_call
->fault_code
)));
212 return NT_STATUS_NET_WRITE_FAULT
;
215 if ((dce_call
->fault_code
== 0) &&
216 (priv
->c_pipe
->conn
->flags
& DCERPC_DEBUG_PRINT_OUT
)) {
217 ndr_print_function_debug(call
->ndr_print
, name
, NDR_OUT
, r
);
223 static NTSTATUS
remote_op_ndr_push(struct dcesrv_call_state
*dce_call
, TALLOC_CTX
*mem_ctx
, struct ndr_push
*push
, const void *r
)
225 enum ndr_err_code ndr_err
;
226 const struct ndr_interface_table
*table
= dce_call
->context
->iface
->private_data
;
227 uint16_t opnum
= dce_call
->pkt
.u
.request
.opnum
;
229 /* unravel the NDR for the packet */
230 ndr_err
= table
->calls
[opnum
].ndr_push(push
, NDR_OUT
, r
);
231 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err
)) {
232 dce_call
->fault_code
= DCERPC_FAULT_NDR
;
233 return NT_STATUS_NET_WRITE_FAULT
;
239 static NTSTATUS
remote_register_one_iface(struct dcesrv_context
*dce_ctx
, const struct dcesrv_interface
*iface
)
242 const struct ndr_interface_table
*table
= iface
->private_data
;
244 for (i
=0;i
<table
->endpoints
->count
;i
++) {
246 const char *name
= table
->endpoints
->names
[i
];
248 ret
= dcesrv_interface_register(dce_ctx
, name
, iface
, NULL
);
249 if (!NT_STATUS_IS_OK(ret
)) {
250 DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name
));
258 static NTSTATUS
remote_op_init_server(struct dcesrv_context
*dce_ctx
, const struct dcesrv_endpoint_server
*ep_server
)
261 const char **ifaces
= (const char **)str_list_make(dce_ctx
, lp_parm_string(dce_ctx
->lp_ctx
, NULL
, "dcerpc_remote", "interfaces"),NULL
);
264 DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
268 for (i
=0;ifaces
[i
];i
++) {
270 struct dcesrv_interface iface
;
272 if (!ep_server
->interface_by_name(&iface
, ifaces
[i
])) {
273 DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces
[i
]));
275 return NT_STATUS_UNSUCCESSFUL
;
278 ret
= remote_register_one_iface(dce_ctx
, &iface
);
279 if (!NT_STATUS_IS_OK(ret
)) {
280 DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces
[i
]));
290 static bool remote_fill_interface(struct dcesrv_interface
*iface
, const struct ndr_interface_table
*if_tabl
)
292 iface
->name
= if_tabl
->name
;
293 iface
->syntax_id
= if_tabl
->syntax_id
;
295 iface
->bind
= remote_op_bind
;
296 iface
->unbind
= remote_op_unbind
;
298 iface
->ndr_pull
= remote_op_ndr_pull
;
299 iface
->dispatch
= remote_op_dispatch
;
300 iface
->reply
= remote_op_reply
;
301 iface
->ndr_push
= remote_op_ndr_push
;
303 iface
->private_data
= if_tabl
;
308 static bool remote_op_interface_by_uuid(struct dcesrv_interface
*iface
, const struct GUID
*uuid
, uint32_t if_version
)
310 const struct ndr_interface_list
*l
;
312 for (l
=ndr_table_list();l
;l
=l
->next
) {
313 if (l
->table
->syntax_id
.if_version
== if_version
&&
314 GUID_equal(&l
->table
->syntax_id
.uuid
, uuid
)==0) {
315 return remote_fill_interface(iface
, l
->table
);
322 static bool remote_op_interface_by_name(struct dcesrv_interface
*iface
, const char *name
)
324 const struct ndr_interface_table
*tbl
= ndr_table_by_name(name
);
327 return remote_fill_interface(iface
, tbl
);
332 NTSTATUS
dcerpc_server_remote_init(void)
335 struct dcesrv_endpoint_server ep_server
;
337 ZERO_STRUCT(ep_server
);
339 /* fill in our name */
340 ep_server
.name
= "remote";
342 /* fill in all the operations */
343 ep_server
.init_server
= remote_op_init_server
;
345 ep_server
.interface_by_uuid
= remote_op_interface_by_uuid
;
346 ep_server
.interface_by_name
= remote_op_interface_by_name
;
348 /* register ourselves with the DCERPC subsystem. */
349 ret
= dcerpc_register_ep_server(&ep_server
);
350 if (!NT_STATUS_IS_OK(ret
)) {
351 DEBUG(0,("Failed to register 'remote' endpoint server!\n"));
355 /* We need the full DCE/RPC interface table */