summaryrefslogtreecommitdiff
path: root/source3/rpc_client/ndr.c
blob: 4e8634d3b9510e08b0907ba445080a2bf44cfad9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/* 
   Unix SMB/CIFS implementation.

   libndr interface

   Copyright (C) Jelmer Vernooij 2006
   Copyright (C) Volker Lendecke 2009
   
   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"

struct cli_do_rpc_ndr_state {
	const struct ndr_interface_call *call;
	prs_struct q_ps, r_ps;
	void *r;
};

static void cli_do_rpc_ndr_done(struct tevent_req *subreq);

struct tevent_req *cli_do_rpc_ndr_send(TALLOC_CTX *mem_ctx,
				       struct tevent_context *ev,
				       struct rpc_pipe_client *cli,
				       const struct ndr_interface_table *table,
				       uint32_t opnum,
				       void *r)
{
	struct tevent_req *req, *subreq;
	struct cli_do_rpc_ndr_state *state;
	struct ndr_push *push;
	DATA_BLOB blob;
	enum ndr_err_code ndr_err;
	bool ret;

	req = tevent_req_create(mem_ctx, &state,
				struct cli_do_rpc_ndr_state);
	if (req == NULL) {
		return NULL;
	}

	if (!ndr_syntax_id_equal(&table->syntax_id, &cli->abstract_syntax)
	    || (opnum >= table->num_calls)) {
		tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
		return tevent_req_post(req, ev);
	}

	state->r = r;
	state->call = &table->calls[opnum];

	if (DEBUGLEVEL >= 10) {
		ndr_print_function_debug(state->call->ndr_print,
					 state->call->name, NDR_IN, r);
	}

	push = ndr_push_init_ctx(talloc_tos(), NULL);
	if (tevent_req_nomem(push, req)) {
		return tevent_req_post(req, ev);
	}

	ndr_err = state->call->ndr_push(push, NDR_IN, r);
	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
		tevent_req_nterror(req, ndr_map_error2ntstatus(ndr_err));
		TALLOC_FREE(push);
		return tevent_req_post(req, ev);
	}

	blob = ndr_push_blob(push);
	ret = prs_init_data_blob(&state->q_ps, &blob, state);
	TALLOC_FREE(push);

	if (!ret) {
		tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
		return tevent_req_post(req, ev);
	}

	subreq = rpc_api_pipe_req_send(state, ev, cli, opnum, &state->q_ps);
	if (tevent_req_nomem(subreq, req)) {
		return tevent_req_post(req, ev);
	}
	tevent_req_set_callback(subreq, cli_do_rpc_ndr_done, req);
	return req;
}

static void cli_do_rpc_ndr_done(struct tevent_req *subreq)
{
	struct tevent_req *req = tevent_req_callback_data(
		subreq, struct tevent_req);
	struct cli_do_rpc_ndr_state *state = tevent_req_data(
		req, struct cli_do_rpc_ndr_state);
	NTSTATUS status;

	status = rpc_api_pipe_req_recv(subreq, state, &state->r_ps);
	TALLOC_FREE(subreq);
	prs_mem_free(&state->q_ps);
	if (!NT_STATUS_IS_OK(status)) {
		tevent_req_nterror(req, status);
		return;
	}
	tevent_req_done(req);
}

NTSTATUS cli_do_rpc_ndr_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx)
{
	struct cli_do_rpc_ndr_state *state = tevent_req_data(
		req, struct cli_do_rpc_ndr_state);
	struct ndr_pull *pull;
	enum ndr_err_code ndr_err;
	NTSTATUS status;
	DATA_BLOB blob;
	bool ret;

	if (tevent_req_is_nterror(req, &status)) {
		return status;
	}

	ret = prs_data_blob(&state->r_ps, &blob, talloc_tos());
	prs_mem_free(&state->r_ps);
	if (!ret) {
		return NT_STATUS_NO_MEMORY;
	}

	pull = ndr_pull_init_blob(&blob, mem_ctx, NULL);
	if (pull == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	/* have the ndr parser alloc memory for us */
	pull->flags |= LIBNDR_FLAG_REF_ALLOC;
	ndr_err = state->call->ndr_pull(pull, NDR_OUT, state->r);
	TALLOC_FREE(pull);

	if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
		if (DEBUGLEVEL >= 10) {
			ndr_print_function_debug(state->call->ndr_print,
						 state->call->name, NDR_OUT,
						 state->r);
		}
	} else {
		return ndr_map_error2ntstatus(ndr_err);
	}

	return NT_STATUS_OK;
}

NTSTATUS cli_do_rpc_ndr(struct rpc_pipe_client *cli,
			TALLOC_CTX *mem_ctx,
			const struct ndr_interface_table *table,
			uint32_t opnum, void *r)
{
	TALLOC_CTX *frame = talloc_stackframe();
	struct event_context *ev;
	struct tevent_req *req;
	NTSTATUS status = NT_STATUS_OK;

	ev = event_context_init(frame);
	if (ev == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto fail;
	}

	req = cli_do_rpc_ndr_send(frame, ev, cli, table, opnum, r);
	if (req == NULL) {
		status = NT_STATUS_NO_MEMORY;
		goto fail;
	}

	if (!tevent_req_poll(req, ev)) {
		status = map_nt_error_from_unix(errno);
		goto fail;
	}

	status = cli_do_rpc_ndr_recv(req, mem_ctx);

	/*
	 * NT_STATUS_IO_TIMEOUT indicates network problem,
	 * tear the connection apart.
	 */
	if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
		if (cli->transport->transport == NCACN_IP_TCP ||
		    cli->transport->transport == NCALRPC) {
			rpccli_close_sock_fd(cli);
		}

		if (cli->transport->transport == NCACN_NP) {
			rpccli_close_np_fd(cli);
		}
	}
 fail:
	TALLOC_FREE(frame);
	return status;
}