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 async_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
288 struct tevent_context *ev, int fd)
290 struct async_req *result;
291 struct tevent_req *subreq;
292 struct resp_read_state *state;
294 if (!async_req_setup(mem_ctx, &result, &state,
295 struct resp_read_state)) {
299 subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
300 if (subreq == NULL) {
303 tevent_req_set_callback(subreq, wb_resp_read_done, result);
311 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
313 struct winbindd_response *resp = (struct winbindd_response *)buf;
316 if (resp->length < sizeof(struct winbindd_response)) {
317 DEBUG(0, ("wb_resp_read_len: Invalid response size "
318 "received: %d (expected at least%d)\n",
320 (int)sizeof(struct winbindd_response)));
324 return resp->length - buflen;
327 static void wb_resp_read_done(struct tevent_req *subreq)
329 struct async_req *req =
330 tevent_req_callback_data(subreq, struct async_req);
331 struct resp_read_state *state = talloc_get_type_abort(
332 req->private_data, struct resp_read_state);
337 ret = read_packet_recv(subreq, state, &buf, &err);
340 async_req_error(req, map_wbc_err_from_errno(err));
344 state->wb_resp = (struct winbindd_response *)buf;
346 if (state->wb_resp->length > sizeof(struct winbindd_response)) {
347 state->wb_resp->extra_data.data =
348 (char *)buf + sizeof(struct winbindd_response);
350 state->wb_resp->extra_data.data = NULL;
355 wbcErr wb_resp_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
356 struct winbindd_response **presp)
358 struct resp_read_state *state = talloc_get_type_abort(
359 req->private_data, struct resp_read_state);
362 if (async_req_is_wbcerr(req, &wbc_err)) {
365 *presp = talloc_move(mem_ctx, &state->wb_resp);
366 return WBC_ERR_SUCCESS;
369 struct resp_write_state {
373 static void wb_resp_write_done(struct tevent_req *subreq);
375 struct async_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
376 struct tevent_context *ev, int fd,
377 struct winbindd_response *wb_resp)
379 struct async_req *result;
380 struct tevent_req *subreq;
381 struct resp_write_state *state;
384 if (!async_req_setup(mem_ctx, &result, &state,
385 struct resp_write_state)) {
389 state->iov[0].iov_base = wb_resp;
390 state->iov[0].iov_len = sizeof(struct winbindd_response);
392 if (wb_resp->length > sizeof(struct winbindd_response)) {
393 state->iov[1].iov_base = wb_resp->extra_data.data;
394 state->iov[1].iov_len =
395 wb_resp->length - sizeof(struct winbindd_response);
399 subreq = writev_send(state, ev, NULL, fd, state->iov, count);
400 if (subreq == NULL) {
403 tevent_req_set_callback(subreq, wb_resp_write_done, result);
411 static void wb_resp_write_done(struct tevent_req *subreq)
413 struct async_req *req =
414 tevent_req_callback_data(subreq, struct async_req);
418 ret = writev_recv(subreq, &err);
421 async_req_error(req, map_wbc_err_from_errno(err));
427 wbcErr wb_resp_write_recv(struct async_req *req)
429 return async_req_simple_recv_wbcerr(req);