2 Unix SMB/CIFS implementation.
4 Async transfer of winbindd_request and _response structs
6 Copyright (C) Volker Lendecke 2008
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 #include "wbc_async.h"
26 #define DBGC_CLASS DBGC_WINBIND
28 struct req_read_state {
29 struct winbindd_request *wb_req;
30 size_t max_extra_data;
33 bool async_req_is_wbcerr(struct async_req *req, wbcErr *pwbc_err)
35 enum async_req_state state;
37 if (!async_req_is_error(req, &state, &error)) {
38 *pwbc_err = WBC_ERR_SUCCESS;
43 case ASYNC_REQ_USER_ERROR:
46 case ASYNC_REQ_TIMED_OUT:
47 *pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
49 case ASYNC_REQ_NO_MEMORY:
50 *pwbc_err = WBC_ERR_NO_MEMORY;
53 *pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
59 wbcErr map_wbc_err_from_errno(int error)
64 return WBC_ERR_AUTH_ERROR;
66 return WBC_ERR_NO_MEMORY;
69 return WBC_ERR_UNKNOWN_FAILURE;
73 wbcErr async_req_simple_recv_wbcerr(struct async_req *req)
77 if (async_req_is_wbcerr(req, &wbc_err)) {
81 return WBC_ERR_SUCCESS;
84 bool tevent_req_is_wbcerr(struct tevent_req *req, wbcErr *pwbc_err)
86 enum tevent_req_state state;
88 if (!tevent_req_is_error(req, &state, &error)) {
89 *pwbc_err = WBC_ERR_SUCCESS;
94 case TEVENT_REQ_USER_ERROR:
97 case TEVENT_REQ_TIMED_OUT:
98 *pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
100 case TEVENT_REQ_NO_MEMORY:
101 *pwbc_err = WBC_ERR_NO_MEMORY;
104 *pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
110 wbcErr tevent_req_simple_recv_wbcerr(struct tevent_req *req)
114 if (tevent_req_is_wbcerr(req, &wbc_err)) {
118 return WBC_ERR_SUCCESS;
121 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
122 static void wb_req_read_done(struct tevent_req *subreq);
124 struct async_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
125 struct tevent_context *ev,
126 int fd, size_t max_extra_data)
128 struct async_req *result;
129 struct tevent_req *subreq;
130 struct req_read_state *state;
132 if (!async_req_setup(mem_ctx, &result, &state,
133 struct req_read_state)) {
136 state->max_extra_data = max_extra_data;
138 subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
139 if (subreq == NULL) {
143 tevent_req_set_callback(subreq, wb_req_read_done, result);
150 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
152 struct req_read_state *state = talloc_get_type_abort(
153 private_data, struct req_read_state);
154 struct winbindd_request *req = (struct winbindd_request *)buf;
157 if (req->length != sizeof(struct winbindd_request)) {
158 DEBUG(0, ("wb_req_read_len: Invalid request size "
159 "received: %d (expected %d)\n",
161 (int)sizeof(struct winbindd_request)));
164 return sizeof(struct winbindd_request) - 4;
167 if ((state->max_extra_data != 0)
168 && (req->extra_len > state->max_extra_data)) {
169 DEBUG(3, ("Got request with %d bytes extra data on "
170 "unprivileged socket\n", (int)req->extra_len));
174 return req->extra_len;
177 static void wb_req_read_done(struct tevent_req *subreq)
179 struct async_req *req =
180 tevent_req_callback_data(subreq, struct async_req);
181 struct req_read_state *state = talloc_get_type_abort(
182 req->private_data, struct req_read_state);
187 ret = read_packet_recv(subreq, state, &buf, &err);
190 async_req_error(req, map_wbc_err_from_errno(err));
194 state->wb_req = (struct winbindd_request *)buf;
196 if (state->wb_req->extra_len != 0) {
197 state->wb_req->extra_data.data =
198 (char *)buf + sizeof(struct winbindd_request);
200 state->wb_req->extra_data.data = NULL;
205 wbcErr wb_req_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
206 struct winbindd_request **preq)
208 struct req_read_state *state = talloc_get_type_abort(
209 req->private_data, struct req_read_state);
212 if (async_req_is_wbcerr(req, &wbc_err)) {
215 *preq = talloc_move(mem_ctx, &state->wb_req);
216 return WBC_ERR_SUCCESS;
219 struct req_write_state {
223 static void wb_req_write_done(struct tevent_req *subreq);
225 struct async_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
226 struct tevent_context *ev, int fd,
227 struct winbindd_request *wb_req)
229 struct async_req *result;
230 struct tevent_req *subreq;
231 struct req_write_state *state;
234 if (!async_req_setup(mem_ctx, &result, &state,
235 struct req_write_state)) {
239 state->iov[0].iov_base = wb_req;
240 state->iov[0].iov_len = sizeof(struct winbindd_request);
242 if (wb_req->extra_len != 0) {
243 state->iov[1].iov_base = wb_req->extra_data.data;
244 state->iov[1].iov_len = wb_req->extra_len;
248 subreq = writev_send(state, ev, NULL, fd, state->iov, count);
249 if (subreq == NULL) {
252 tevent_req_set_callback(subreq, wb_req_write_done, result);
260 static void wb_req_write_done(struct tevent_req *subreq)
262 struct async_req *req =
263 tevent_req_callback_data(subreq, struct async_req);
267 ret = writev_recv(subreq, &err);
270 async_req_error(req, map_wbc_err_from_errno(err));
276 wbcErr wb_req_write_recv(struct async_req *req)
278 return async_req_simple_recv_wbcerr(req);
281 struct resp_read_state {
282 struct winbindd_response *wb_resp;
285 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
286 static void wb_resp_read_done(struct tevent_req *subreq);
288 struct async_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
289 struct tevent_context *ev, int fd)
291 struct async_req *result;
292 struct tevent_req *subreq;
293 struct resp_read_state *state;
295 if (!async_req_setup(mem_ctx, &result, &state,
296 struct resp_read_state)) {
300 subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
301 if (subreq == NULL) {
304 tevent_req_set_callback(subreq, wb_resp_read_done, result);
312 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
314 struct winbindd_response *resp = (struct winbindd_response *)buf;
317 if (resp->length < sizeof(struct winbindd_response)) {
318 DEBUG(0, ("wb_resp_read_len: Invalid response size "
319 "received: %d (expected at least%d)\n",
321 (int)sizeof(struct winbindd_response)));
325 return resp->length - buflen;
328 static void wb_resp_read_done(struct tevent_req *subreq)
330 struct async_req *req =
331 tevent_req_callback_data(subreq, struct async_req);
332 struct resp_read_state *state = talloc_get_type_abort(
333 req->private_data, struct resp_read_state);
338 ret = read_packet_recv(subreq, state, &buf, &err);
341 async_req_error(req, map_wbc_err_from_errno(err));
345 state->wb_resp = (struct winbindd_response *)buf;
347 if (state->wb_resp->length > sizeof(struct winbindd_response)) {
348 state->wb_resp->extra_data.data =
349 (char *)buf + sizeof(struct winbindd_response);
351 state->wb_resp->extra_data.data = NULL;
356 wbcErr wb_resp_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
357 struct winbindd_response **presp)
359 struct resp_read_state *state = talloc_get_type_abort(
360 req->private_data, struct resp_read_state);
363 if (async_req_is_wbcerr(req, &wbc_err)) {
366 *presp = talloc_move(mem_ctx, &state->wb_resp);
367 return WBC_ERR_SUCCESS;
370 struct resp_write_state {
374 static void wb_resp_write_done(struct tevent_req *subreq);
376 struct async_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
377 struct tevent_context *ev, int fd,
378 struct winbindd_response *wb_resp)
380 struct async_req *result;
381 struct tevent_req *subreq;
382 struct resp_write_state *state;
385 if (!async_req_setup(mem_ctx, &result, &state,
386 struct resp_write_state)) {
390 state->iov[0].iov_base = wb_resp;
391 state->iov[0].iov_len = sizeof(struct winbindd_response);
393 if (wb_resp->length > sizeof(struct winbindd_response)) {
394 state->iov[1].iov_base = wb_resp->extra_data.data;
395 state->iov[1].iov_len =
396 wb_resp->length - sizeof(struct winbindd_response);
400 subreq = writev_send(state, ev, NULL, fd, state->iov, count);
401 if (subreq == NULL) {
404 tevent_req_set_callback(subreq, wb_resp_write_done, result);
412 static void wb_resp_write_done(struct tevent_req *subreq)
414 struct async_req *req =
415 tevent_req_callback_data(subreq, struct async_req);
419 ret = writev_recv(subreq, &err);
422 async_req_error(req, map_wbc_err_from_errno(err));
428 wbcErr wb_resp_write_recv(struct async_req *req)
430 return async_req_simple_recv_wbcerr(req);