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 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
85 static void wb_req_read_done(struct tevent_req *subreq);
87 struct async_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
88 struct tevent_context *ev,
89 int fd, size_t max_extra_data)
91 struct async_req *result;
92 struct tevent_req *subreq;
93 struct req_read_state *state;
95 if (!async_req_setup(mem_ctx, &result, &state,
96 struct req_read_state)) {
99 state->max_extra_data = max_extra_data;
101 subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
102 if (subreq == NULL) {
106 tevent_req_set_callback(subreq, wb_req_read_done, result);
113 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
115 struct req_read_state *state = talloc_get_type_abort(
116 private_data, struct req_read_state);
117 struct winbindd_request *req = (struct winbindd_request *)buf;
120 if (req->length != sizeof(struct winbindd_request)) {
121 DEBUG(0, ("wb_req_read_len: Invalid request size "
122 "received: %d (expected %d)\n",
124 (int)sizeof(struct winbindd_request)));
127 return sizeof(struct winbindd_request) - 4;
130 if ((state->max_extra_data != 0)
131 && (req->extra_len > state->max_extra_data)) {
132 DEBUG(3, ("Got request with %d bytes extra data on "
133 "unprivileged socket\n", (int)req->extra_len));
137 return req->extra_len;
140 static void wb_req_read_done(struct tevent_req *subreq)
142 struct async_req *req =
143 tevent_req_callback_data(subreq, struct async_req);
144 struct req_read_state *state = talloc_get_type_abort(
145 req->private_data, struct req_read_state);
150 ret = read_packet_recv(subreq, state, &buf, &err);
153 async_req_error(req, map_wbc_err_from_errno(err));
157 state->wb_req = (struct winbindd_request *)buf;
159 if (state->wb_req->extra_len != 0) {
160 state->wb_req->extra_data.data =
161 (char *)buf + sizeof(struct winbindd_request);
163 state->wb_req->extra_data.data = NULL;
168 wbcErr wb_req_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
169 struct winbindd_request **preq)
171 struct req_read_state *state = talloc_get_type_abort(
172 req->private_data, struct req_read_state);
175 if (async_req_is_wbcerr(req, &wbc_err)) {
178 *preq = talloc_move(mem_ctx, &state->wb_req);
179 return WBC_ERR_SUCCESS;
182 struct req_write_state {
186 static void wb_req_write_done(struct tevent_req *subreq);
188 struct async_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
189 struct tevent_context *ev, int fd,
190 struct winbindd_request *wb_req)
192 struct async_req *result;
193 struct tevent_req *subreq;
194 struct req_write_state *state;
197 if (!async_req_setup(mem_ctx, &result, &state,
198 struct req_write_state)) {
202 state->iov[0].iov_base = wb_req;
203 state->iov[0].iov_len = sizeof(struct winbindd_request);
205 if (wb_req->extra_len != 0) {
206 state->iov[1].iov_base = wb_req->extra_data.data;
207 state->iov[1].iov_len = wb_req->extra_len;
211 subreq = writev_send(state, ev, fd, state->iov, count);
212 if (subreq == NULL) {
215 tevent_req_set_callback(subreq, wb_req_write_done, result);
223 static void wb_req_write_done(struct tevent_req *subreq)
225 struct async_req *req =
226 tevent_req_callback_data(subreq, struct async_req);
230 ret = writev_recv(subreq, &err);
233 async_req_error(req, map_wbc_err_from_errno(err));
239 wbcErr wb_req_write_recv(struct async_req *req)
241 return async_req_simple_recv_wbcerr(req);
244 struct resp_read_state {
245 struct winbindd_response *wb_resp;
248 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
249 static void wb_resp_read_done(struct tevent_req *subreq);
251 struct async_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
252 struct tevent_context *ev, int fd)
254 struct async_req *result;
255 struct tevent_req *subreq;
256 struct resp_read_state *state;
258 if (!async_req_setup(mem_ctx, &result, &state,
259 struct resp_read_state)) {
263 subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
264 if (subreq == NULL) {
267 tevent_req_set_callback(subreq, wb_resp_read_done, result);
275 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
277 struct winbindd_response *resp = (struct winbindd_response *)buf;
280 if (resp->length < sizeof(struct winbindd_response)) {
281 DEBUG(0, ("wb_resp_read_len: Invalid response size "
282 "received: %d (expected at least%d)\n",
284 (int)sizeof(struct winbindd_response)));
288 return resp->length - buflen;
291 static void wb_resp_read_done(struct tevent_req *subreq)
293 struct async_req *req =
294 tevent_req_callback_data(subreq, struct async_req);
295 struct resp_read_state *state = talloc_get_type_abort(
296 req->private_data, struct resp_read_state);
301 ret = read_packet_recv(subreq, state, &buf, &err);
304 async_req_error(req, map_wbc_err_from_errno(err));
308 state->wb_resp = (struct winbindd_response *)buf;
310 if (state->wb_resp->length > sizeof(struct winbindd_response)) {
311 state->wb_resp->extra_data.data =
312 (char *)buf + sizeof(struct winbindd_response);
314 state->wb_resp->extra_data.data = NULL;
319 wbcErr wb_resp_read_recv(struct async_req *req, TALLOC_CTX *mem_ctx,
320 struct winbindd_response **presp)
322 struct resp_read_state *state = talloc_get_type_abort(
323 req->private_data, struct resp_read_state);
326 if (async_req_is_wbcerr(req, &wbc_err)) {
329 *presp = talloc_move(mem_ctx, &state->wb_resp);
330 return WBC_ERR_SUCCESS;
333 struct resp_write_state {
337 static void wb_resp_write_done(struct tevent_req *subreq);
339 struct async_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
340 struct tevent_context *ev, int fd,
341 struct winbindd_response *wb_resp)
343 struct async_req *result;
344 struct tevent_req *subreq;
345 struct resp_write_state *state;
348 if (!async_req_setup(mem_ctx, &result, &state,
349 struct resp_write_state)) {
353 state->iov[0].iov_base = wb_resp;
354 state->iov[0].iov_len = sizeof(struct winbindd_response);
356 if (wb_resp->length > sizeof(struct winbindd_response)) {
357 state->iov[1].iov_base = wb_resp->extra_data.data;
358 state->iov[1].iov_len =
359 wb_resp->length - sizeof(struct winbindd_response);
363 subreq = writev_send(state, ev, fd, state->iov, count);
364 if (subreq == NULL) {
367 tevent_req_set_callback(subreq, wb_resp_write_done, result);
375 static void wb_resp_write_done(struct tevent_req *subreq)
377 struct async_req *req =
378 tevent_req_callback_data(subreq, struct async_req);
382 ret = writev_recv(subreq, &err);
385 async_req_error(req, map_wbc_err_from_errno(err));
391 wbcErr wb_resp_write_recv(struct async_req *req)
393 return async_req_simple_recv_wbcerr(req);