2 Unix SMB/CIFS implementation.
4 Provide parent->child communication based on NDR marshalling
6 Copyright (C) Volker Lendecke 2009
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 * This file implements an RPC between winbind parent and child processes,
24 * leveraging the autogenerated marshalling routines for MSRPC. This is not
25 * MSRPC, as it does not go through the whole DCERPC fragmentation, we just
26 * leverage much the same infrastructure we already have for it.
30 #include "winbindd/winbindd.h"
31 #include "winbindd/winbindd_proto.h"
32 #include "librpc/gen_ndr/srv_wbint.h"
34 struct wb_ndr_transport_priv {
35 struct winbindd_domain *domain;
36 struct winbindd_child *child;
39 struct wb_ndr_dispatch_state {
40 struct wb_ndr_transport_priv *transport;
42 const struct ndr_interface_call *call;
44 DATA_BLOB req_blob, resp_blob;
45 struct winbindd_request request;
46 struct winbindd_response *response;
49 static void wb_ndr_dispatch_done(struct tevent_req *subreq);
51 static struct tevent_req *wb_ndr_dispatch_send(TALLOC_CTX *mem_ctx,
52 struct tevent_context *ev,
53 struct rpc_pipe_client *cli,
54 const char *interface,
55 uint32_t interface_version,
59 struct tevent_req *req, *subreq;
60 struct wb_ndr_dispatch_state *state;
61 struct wb_ndr_transport_priv *transport = talloc_get_type_abort(
62 cli->transport->priv, struct wb_ndr_transport_priv);
63 struct ndr_push *push;
64 enum ndr_err_code ndr_err;
66 req = tevent_req_create(mem_ctx, &state,
67 struct wb_ndr_dispatch_state);
73 state->call = &ndr_table_wbint.calls[opnum];
74 state->transport = transport;
77 push = ndr_push_init_ctx(state, NULL);
78 if (tevent_req_nomem(push, req)) {
79 return tevent_req_post(req, ev);
82 ndr_err = state->call->ndr_push(push, NDR_IN, r);
83 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
84 tevent_req_nterror(req, ndr_map_error2ntstatus(ndr_err));
86 return tevent_req_post(req, ev);
89 state->req_blob = ndr_push_blob(push);
91 if ((transport->domain != NULL)
92 && wcache_fetch_ndr(state, transport->domain, opnum,
93 &state->req_blob, &state->resp_blob)) {
95 return tevent_req_post(req, ev);
98 state->request.cmd = WINBINDD_DUAL_NDRCMD;
99 state->request.data.ndrcmd = opnum;
100 state->request.extra_data.data = (char *)state->req_blob.data;
101 state->request.extra_len = state->req_blob.length;
103 subreq = wb_child_request_send(state, ev, transport->child,
105 if (tevent_req_nomem(subreq, req)) {
106 return tevent_req_post(req, ev);
108 tevent_req_set_callback(subreq, wb_ndr_dispatch_done, req);
112 static void wb_ndr_dispatch_done(struct tevent_req *subreq)
114 struct tevent_req *req = tevent_req_callback_data(
115 subreq, struct tevent_req);
116 struct wb_ndr_dispatch_state *state = tevent_req_data(
117 req, struct wb_ndr_dispatch_state);
120 ret = wb_child_request_recv(subreq, state, &state->response, &err);
123 tevent_req_nterror(req, map_nt_error_from_unix(err));
127 state->resp_blob = data_blob_const(
128 state->response->extra_data.data,
129 state->response->length - sizeof(struct winbindd_response));
131 if (state->transport->domain != NULL) {
132 wcache_store_ndr(state->transport->domain, state->opnum,
133 &state->req_blob, &state->resp_blob);
136 tevent_req_done(req);
139 static NTSTATUS wb_ndr_dispatch_recv(struct tevent_req *req,
142 struct wb_ndr_dispatch_state *state = tevent_req_data(
143 req, struct wb_ndr_dispatch_state);
145 struct ndr_pull *pull;
146 enum ndr_err_code ndr_err;
148 if (tevent_req_is_nterror(req, &status)) {
152 pull = ndr_pull_init_blob(&state->resp_blob, mem_ctx, NULL);
154 return NT_STATUS_NO_MEMORY;
157 /* have the ndr parser alloc memory for us */
158 pull->flags |= LIBNDR_FLAG_REF_ALLOC;
159 ndr_err = state->call->ndr_pull(pull, NDR_OUT, state->r);
162 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
163 return ndr_map_error2ntstatus(ndr_err);
169 static NTSTATUS wb_ndr_dispatch(struct rpc_pipe_client *cli,
171 const char *interface,
172 uint32_t interface_version,
173 uint32_t opnum, void *r)
175 TALLOC_CTX *frame = talloc_stackframe();
176 struct event_context *ev;
177 struct tevent_req *req;
178 NTSTATUS status = NT_STATUS_OK;
180 ev = event_context_init(frame);
182 status = NT_STATUS_NO_MEMORY;
186 req = wb_ndr_dispatch_send(frame, ev, cli, interface,
187 interface_version, opnum, r);
189 status = NT_STATUS_NO_MEMORY;
193 if (!tevent_req_poll(req, ev)) {
194 status = map_nt_error_from_unix(errno);
198 status = wb_ndr_dispatch_recv(req, mem_ctx);
204 struct rpc_pipe_client *wbint_rpccli_create(TALLOC_CTX *mem_ctx,
205 struct winbindd_domain *domain,
206 struct winbindd_child *child)
208 struct rpc_pipe_client *result;
209 struct wb_ndr_transport_priv *transp;
211 result = talloc(mem_ctx, struct rpc_pipe_client);
212 if (result == NULL) {
215 result->abstract_syntax = ndr_table_wbint.syntax_id;
216 result->transfer_syntax = ndr_transfer_syntax;
217 result->dispatch = wb_ndr_dispatch;
218 result->dispatch_send = wb_ndr_dispatch_send;
219 result->dispatch_recv = wb_ndr_dispatch_recv;
220 result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
221 result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
222 result->desthost = NULL;
223 result->srv_name_slash = NULL;
226 * Initialize a fake transport. Due to our own wb_ndr_dispatch
227 * function we don't use all the fragmentation engine in
228 * cli_pipe, which would use all the _read and _write
229 * functions in rpc_cli_transport. But we need a place to
230 * store the child struct in, and we're re-using
231 * result->transport->priv for that.
234 result->transport = talloc_zero(result, struct rpc_cli_transport);
235 if (result->transport == NULL) {
239 transp = talloc(result->transport, struct wb_ndr_transport_priv);
240 if (transp == NULL) {
244 transp->domain = domain;
245 transp->child = child;
246 result->transport->priv = transp;
250 enum winbindd_result winbindd_dual_ndrcmd(struct winbindd_domain *domain,
251 struct winbindd_cli_state *state)
254 struct api_struct *fns;
258 wbint_get_pipe_fns(&fns, &num_fns);
260 if (state->request->data.ndrcmd >= num_fns) {
261 return WINBINDD_ERROR;
264 DEBUG(10, ("winbindd_dual_ndrcmd: Running command %s (%s)\n",
265 fns[state->request->data.ndrcmd].name,
266 domain ? domain->name : "no domain"));
269 p.mem_ctx = talloc_stackframe();
270 p.interface = &ndr_table_wbint;
271 p.in_data.data.buffer_size = state->request->extra_len;
272 p.in_data.data.data_p = state->request->extra_data.data;
273 prs_init(&p.out_data.rdata, 0, state->mem_ctx, false);
275 ret = fns[state->request->data.ndrcmd].fn(&p);
276 TALLOC_FREE(p.mem_ctx);
278 return WINBINDD_ERROR;
281 state->response->extra_data.data =
282 talloc_memdup(state->mem_ctx, p.out_data.rdata.data_p,
283 p.out_data.rdata.data_offset);
284 state->response->length += p.out_data.rdata.data_offset;
285 prs_mem_free(&p.out_data.rdata);
286 if (state->response->extra_data.data == NULL) {
287 return WINBINDD_ERROR;
293 * Just a dummy to make srv_wbint.c happy
295 NTSTATUS rpc_srv_register(int version, const char *clnt, const char *srv,
296 const struct ndr_interface_table *iface,
297 const struct api_struct *cmds, int size)