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 tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
125 struct tevent_context *ev,
126 int fd, size_t max_extra_data)
128 struct tevent_req *result, *subreq;
129 struct req_read_state *state;
131 result = tevent_req_create(mem_ctx, &state, struct req_read_state);
132 if (result == NULL) {
135 state->max_extra_data = max_extra_data;
137 subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
138 if (subreq == NULL) {
142 tevent_req_set_callback(subreq, wb_req_read_done, result);
149 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
151 struct req_read_state *state = talloc_get_type_abort(
152 private_data, struct req_read_state);
153 struct winbindd_request *req = (struct winbindd_request *)buf;
156 if (req->length != sizeof(struct winbindd_request)) {
157 DEBUG(0, ("wb_req_read_len: Invalid request size "
158 "received: %d (expected %d)\n",
160 (int)sizeof(struct winbindd_request)));
163 return sizeof(struct winbindd_request) - 4;
166 if ((state->max_extra_data != 0)
167 && (req->extra_len > state->max_extra_data)) {
168 DEBUG(3, ("Got request with %d bytes extra data on "
169 "unprivileged socket\n", (int)req->extra_len));
173 return req->extra_len;
176 static void wb_req_read_done(struct tevent_req *subreq)
178 struct tevent_req *req = tevent_req_callback_data(
179 subreq, struct tevent_req);
180 struct req_read_state *state = tevent_req_data(
181 req, struct req_read_state);
186 ret = read_packet_recv(subreq, state, &buf, &err);
189 tevent_req_error(req, map_wbc_err_from_errno(err));
193 state->wb_req = (struct winbindd_request *)buf;
195 if (state->wb_req->extra_len != 0) {
196 state->wb_req->extra_data.data =
197 (char *)buf + sizeof(struct winbindd_request);
199 state->wb_req->extra_data.data = NULL;
201 tevent_req_done(req);
204 wbcErr wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
205 struct winbindd_request **preq)
207 struct req_read_state *state = tevent_req_data(
208 req, struct req_read_state);
211 if (tevent_req_is_wbcerr(req, &wbc_err)) {
214 *preq = talloc_move(mem_ctx, &state->wb_req);
215 return WBC_ERR_SUCCESS;
218 struct req_write_state {
222 static void wb_req_write_done(struct tevent_req *subreq);
224 struct tevent_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
225 struct tevent_context *ev,
226 struct tevent_queue *queue, int fd,
227 struct winbindd_request *wb_req)
229 struct tevent_req *result, *subreq;
230 struct req_write_state *state;
233 result = tevent_req_create(mem_ctx, &state, struct req_write_state);
234 if (result == NULL) {
238 state->iov[0].iov_base = wb_req;
239 state->iov[0].iov_len = sizeof(struct winbindd_request);
241 if (wb_req->extra_len != 0) {
242 state->iov[1].iov_base = wb_req->extra_data.data;
243 state->iov[1].iov_len = wb_req->extra_len;
247 subreq = writev_send(state, ev, queue, fd, state->iov, count);
248 if (subreq == NULL) {
251 tevent_req_set_callback(subreq, wb_req_write_done, result);
259 static void wb_req_write_done(struct tevent_req *subreq)
261 struct tevent_req *req = tevent_req_callback_data(
262 subreq, struct tevent_req);
266 ret = writev_recv(subreq, &err);
269 tevent_req_error(req, map_wbc_err_from_errno(err));
272 tevent_req_done(req);
275 wbcErr wb_req_write_recv(struct tevent_req *req)
277 return tevent_req_simple_recv_wbcerr(req);
280 struct resp_read_state {
281 struct winbindd_response *wb_resp;
284 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
285 static void wb_resp_read_done(struct tevent_req *subreq);
287 struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
288 struct tevent_context *ev, int fd)
290 struct tevent_req *result, *subreq;
291 struct resp_read_state *state;
293 result = tevent_req_create(mem_ctx, &state, struct resp_read_state);
294 if (result == NULL) {
298 subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
299 if (subreq == NULL) {
302 tevent_req_set_callback(subreq, wb_resp_read_done, result);
310 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
312 struct winbindd_response *resp = (struct winbindd_response *)buf;
315 if (resp->length < sizeof(struct winbindd_response)) {
316 DEBUG(0, ("wb_resp_read_len: Invalid response size "
317 "received: %d (expected at least%d)\n",
319 (int)sizeof(struct winbindd_response)));
323 return resp->length - buflen;
326 static void wb_resp_read_done(struct tevent_req *subreq)
328 struct tevent_req *req = tevent_req_callback_data(
329 subreq, struct tevent_req);
330 struct resp_read_state *state = tevent_req_data(
331 req, struct resp_read_state);
336 ret = read_packet_recv(subreq, state, &buf, &err);
339 tevent_req_error(req, map_wbc_err_from_errno(err));
343 state->wb_resp = (struct winbindd_response *)buf;
345 if (state->wb_resp->length > sizeof(struct winbindd_response)) {
346 state->wb_resp->extra_data.data =
347 (char *)buf + sizeof(struct winbindd_response);
349 state->wb_resp->extra_data.data = NULL;
351 tevent_req_done(req);
354 wbcErr wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
355 struct winbindd_response **presp)
357 struct resp_read_state *state = tevent_req_data(
358 req, struct resp_read_state);
361 if (tevent_req_is_wbcerr(req, &wbc_err)) {
364 *presp = talloc_move(mem_ctx, &state->wb_resp);
365 return WBC_ERR_SUCCESS;
368 struct resp_write_state {
372 static void wb_resp_write_done(struct tevent_req *subreq);
374 struct tevent_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
375 struct tevent_context *ev, int fd,
376 struct winbindd_response *wb_resp)
378 struct tevent_req *result, *subreq;
379 struct resp_write_state *state;
382 result = tevent_req_create(mem_ctx, &state, struct resp_write_state);
383 if (result == NULL) {
387 state->iov[0].iov_base = wb_resp;
388 state->iov[0].iov_len = sizeof(struct winbindd_response);
390 if (wb_resp->length > sizeof(struct winbindd_response)) {
391 state->iov[1].iov_base = wb_resp->extra_data.data;
392 state->iov[1].iov_len =
393 wb_resp->length - sizeof(struct winbindd_response);
397 subreq = writev_send(state, ev, NULL, fd, state->iov, count);
398 if (subreq == NULL) {
401 tevent_req_set_callback(subreq, wb_resp_write_done, result);
409 static void wb_resp_write_done(struct tevent_req *subreq)
411 struct tevent_req *req = tevent_req_callback_data(
412 subreq, struct tevent_req);
416 ret = writev_recv(subreq, &err);
419 tevent_req_error(req, map_wbc_err_from_errno(err));
422 tevent_req_done(req);
425 wbcErr wb_resp_write_recv(struct tevent_req *req)
427 return tevent_req_simple_recv_wbcerr(req);