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 = lpcfg_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 = lpcfg_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 = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "user");
69 pass = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "dcerpc_remote", "password");
70 domain = lpcfg_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 NTSTATUS remote_op_ndr_pull(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_pull *pull, void **r)
151 enum ndr_err_code ndr_err;
152 const struct ndr_interface_table *table = (const struct ndr_interface_table *)dce_call->context->iface->private_data;
153 uint16_t opnum = dce_call->pkt.u.request.opnum;
155 dce_call->fault_code = 0;
157 if (opnum >= table->num_calls) {
158 dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
159 return NT_STATUS_NET_WRITE_FAULT;
162 *r = talloc_size(mem_ctx, table->calls[opnum].struct_size);
164 return NT_STATUS_NO_MEMORY;
167 /* unravel the NDR for the packet */
168 ndr_err = table->calls[opnum].ndr_pull(pull, NDR_IN, *r);
169 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
170 dcerpc_log_packet(dce_call->conn->packet_log_dir,
171 table, opnum, NDR_IN,
172 &dce_call->pkt.u.request.stub_and_verifier);
173 dce_call->fault_code = DCERPC_FAULT_NDR;
174 return NT_STATUS_NET_WRITE_FAULT;
180 static void remote_op_dispatch_done(struct rpc_request *rreq);
182 static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
184 struct dcesrv_remote_private *priv = talloc_get_type_abort(dce_call->context->private_data,
185 struct dcesrv_remote_private);
186 uint16_t opnum = dce_call->pkt.u.request.opnum;
187 const struct ndr_interface_table *table = dce_call->context->iface->private_data;
188 const struct ndr_interface_call *call;
190 struct rpc_request *rreq;
192 name = table->calls[opnum].name;
193 call = &table->calls[opnum];
195 if (priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) {
196 ndr_print_function_debug(call->ndr_print, name, NDR_IN | NDR_SET_VALUES, r);
199 priv->c_pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
201 /* we didn't use the return code of this function as we only check the last_fault_code */
202 rreq = dcerpc_ndr_request_send(priv->c_pipe, NULL, table, opnum, true, mem_ctx, r);
204 DEBUG(0,("dcesrv_remote: call[%s] dcerpc_ndr_request_send() failed!\n", name));
205 return NT_STATUS_NO_MEMORY;
207 rreq->async.callback = remote_op_dispatch_done;
208 rreq->async.private_data = dce_call;
210 dce_call->state_flags |= DCESRV_CALL_STATE_FLAG_ASYNC;
214 static void remote_op_dispatch_done(struct rpc_request *rreq)
216 struct dcesrv_call_state *dce_call = talloc_get_type_abort(rreq->async.private_data,
217 struct dcesrv_call_state);
218 struct dcesrv_remote_private *priv = talloc_get_type_abort(dce_call->context->private_data,
219 struct dcesrv_remote_private);
220 uint16_t opnum = dce_call->pkt.u.request.opnum;
221 const struct ndr_interface_table *table = dce_call->context->iface->private_data;
222 const struct ndr_interface_call *call;
226 name = table->calls[opnum].name;
227 call = &table->calls[opnum];
229 /* we didn't use the return code of this function as we only check the last_fault_code */
230 status = dcerpc_ndr_request_recv(rreq);
232 dce_call->fault_code = priv->c_pipe->last_fault_code;
233 if (dce_call->fault_code != 0) {
234 DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",
235 name, dcerpc_errstr(dce_call, dce_call->fault_code)));
239 if (NT_STATUS_IS_OK(status) &&
240 (priv->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) {
241 ndr_print_function_debug(call->ndr_print, name, NDR_OUT, dce_call->r);
245 status = dcesrv_reply(dce_call);
246 if (!NT_STATUS_IS_OK(status)) {
247 DEBUG(0,("dcesrv_remote: call[%s]: dcesrv_reply() failed - %s\n",
248 name, nt_errstr(status)));
252 static NTSTATUS remote_op_ndr_push(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_push *push, const void *r)
254 enum ndr_err_code ndr_err;
255 const struct ndr_interface_table *table = dce_call->context->iface->private_data;
256 uint16_t opnum = dce_call->pkt.u.request.opnum;
258 /* unravel the NDR for the packet */
259 ndr_err = table->calls[opnum].ndr_push(push, NDR_OUT, r);
260 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
261 dce_call->fault_code = DCERPC_FAULT_NDR;
262 return NT_STATUS_NET_WRITE_FAULT;
268 static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface)
271 const struct ndr_interface_table *table = iface->private_data;
273 for (i=0;i<table->endpoints->count;i++) {
275 const char *name = table->endpoints->names[i];
277 ret = dcesrv_interface_register(dce_ctx, name, iface, NULL);
278 if (!NT_STATUS_IS_OK(ret)) {
279 DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name));
287 static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server)
290 const char **ifaces = (const char **)str_list_make(dce_ctx, lpcfg_parm_string(dce_ctx->lp_ctx, NULL, "dcerpc_remote", "interfaces"),NULL);
293 DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
297 for (i=0;ifaces[i];i++) {
299 struct dcesrv_interface iface;
301 if (!ep_server->interface_by_name(&iface, ifaces[i])) {
302 DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces[i]));
304 return NT_STATUS_UNSUCCESSFUL;
307 ret = remote_register_one_iface(dce_ctx, &iface);
308 if (!NT_STATUS_IS_OK(ret)) {
309 DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces[i]));
319 static bool remote_fill_interface(struct dcesrv_interface *iface, const struct ndr_interface_table *if_tabl)
321 iface->name = if_tabl->name;
322 iface->syntax_id = if_tabl->syntax_id;
324 iface->bind = remote_op_bind;
325 iface->unbind = NULL;
327 iface->ndr_pull = remote_op_ndr_pull;
328 iface->dispatch = remote_op_dispatch;
329 iface->reply = remote_op_reply;
330 iface->ndr_push = remote_op_ndr_push;
332 iface->private_data = if_tabl;
337 static bool remote_op_interface_by_uuid(struct dcesrv_interface *iface, const struct GUID *uuid, uint32_t if_version)
339 const struct ndr_interface_list *l;
341 for (l=ndr_table_list();l;l=l->next) {
342 if (l->table->syntax_id.if_version == if_version &&
343 GUID_equal(&l->table->syntax_id.uuid, uuid)==0) {
344 return remote_fill_interface(iface, l->table);
351 static bool remote_op_interface_by_name(struct dcesrv_interface *iface, const char *name)
353 const struct ndr_interface_table *tbl = ndr_table_by_name(name);
356 return remote_fill_interface(iface, tbl);
361 NTSTATUS dcerpc_server_remote_init(void)
364 struct dcesrv_endpoint_server ep_server;
366 ZERO_STRUCT(ep_server);
368 /* fill in our name */
369 ep_server.name = "remote";
371 /* fill in all the operations */
372 ep_server.init_server = remote_op_init_server;
374 ep_server.interface_by_uuid = remote_op_interface_by_uuid;
375 ep_server.interface_by_name = remote_op_interface_by_name;
377 /* register ourselves with the DCERPC subsystem. */
378 ret = dcerpc_register_ep_server(&ep_server);
379 if (!NT_STATUS_IS_OK(ret)) {
380 DEBUG(0,("Failed to register 'remote' endpoint server!\n"));
384 /* We need the full DCE/RPC interface table */