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;
34 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
35 static void wb_req_read_done(struct tevent_req *subreq);
37 struct tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
38 struct tevent_context *ev,
39 int fd, size_t max_extra_data)
41 struct tevent_req *req, *subreq;
42 struct req_read_state *state;
44 req = tevent_req_create(mem_ctx, &state, struct req_read_state);
48 state->max_extra_data = max_extra_data;
50 subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
51 if (tevent_req_nomem(subreq, req)) {
52 return tevent_req_post(req, ev);
54 tevent_req_set_callback(subreq, wb_req_read_done, req);
58 static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
60 struct req_read_state *state = talloc_get_type_abort(
61 private_data, struct req_read_state);
62 struct winbindd_request *req = (struct winbindd_request *)buf;
65 if (req->length != sizeof(struct winbindd_request)) {
66 DEBUG(0, ("wb_req_read_len: Invalid request size "
67 "received: %d (expected %d)\n",
69 (int)sizeof(struct winbindd_request)));
72 return sizeof(struct winbindd_request) - 4;
75 if ((state->max_extra_data != 0)
76 && (req->extra_len > state->max_extra_data)) {
77 DEBUG(3, ("Got request with %d bytes extra data on "
78 "unprivileged socket\n", (int)req->extra_len));
82 return req->extra_len;
85 static void wb_req_read_done(struct tevent_req *subreq)
87 struct tevent_req *req = tevent_req_callback_data(
88 subreq, struct tevent_req);
89 struct req_read_state *state = tevent_req_data(
90 req, struct req_read_state);
94 state->ret = read_packet_recv(subreq, state, &buf, &err);
96 if (state->ret == -1) {
97 tevent_req_error(req, err);
101 state->wb_req = (struct winbindd_request *)buf;
103 if (state->wb_req->extra_len != 0) {
104 state->wb_req->extra_data.data =
105 (char *)buf + sizeof(struct winbindd_request);
107 state->wb_req->extra_data.data = NULL;
109 tevent_req_done(req);
112 ssize_t wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
113 struct winbindd_request **preq, int *err)
115 struct req_read_state *state = tevent_req_data(
116 req, struct req_read_state);
118 if (tevent_req_is_unix_error(req, err)) {
121 *preq = talloc_move(mem_ctx, &state->wb_req);
125 struct req_write_state {
130 static void wb_req_write_done(struct tevent_req *subreq);
132 struct tevent_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
133 struct tevent_context *ev,
134 struct tevent_queue *queue, int fd,
135 struct winbindd_request *wb_req)
137 struct tevent_req *req, *subreq;
138 struct req_write_state *state;
141 req = tevent_req_create(mem_ctx, &state, struct req_write_state);
146 state->iov[0].iov_base = wb_req;
147 state->iov[0].iov_len = sizeof(struct winbindd_request);
149 if (wb_req->extra_len != 0) {
150 state->iov[1].iov_base = wb_req->extra_data.data;
151 state->iov[1].iov_len = wb_req->extra_len;
155 subreq = writev_send(state, ev, queue, fd, state->iov, count);
156 if (tevent_req_nomem(subreq, req)) {
157 return tevent_req_post(req, ev);
159 tevent_req_set_callback(subreq, wb_req_write_done, req);
163 static void wb_req_write_done(struct tevent_req *subreq)
165 struct tevent_req *req = tevent_req_callback_data(
166 subreq, struct tevent_req);
167 struct req_write_state *state = tevent_req_data(
168 req, struct req_write_state);
171 state->ret = writev_recv(subreq, &err);
173 if (state->ret < 0) {
174 tevent_req_error(req, err);
177 tevent_req_done(req);
180 ssize_t wb_req_write_recv(struct tevent_req *req, int *err)
182 struct req_write_state *state = tevent_req_data(
183 req, struct req_write_state);
185 if (tevent_req_is_unix_error(req, err)) {
191 struct resp_read_state {
192 struct winbindd_response *wb_resp;
196 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
197 static void wb_resp_read_done(struct tevent_req *subreq);
199 struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
200 struct tevent_context *ev, int fd)
202 struct tevent_req *req, *subreq;
203 struct resp_read_state *state;
205 req = tevent_req_create(mem_ctx, &state, struct resp_read_state);
210 subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
211 if (tevent_req_nomem(subreq, req)) {
212 return tevent_req_post(req, ev);
214 tevent_req_set_callback(subreq, wb_resp_read_done, req);
218 static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
220 struct winbindd_response *resp = (struct winbindd_response *)buf;
223 if (resp->length < sizeof(struct winbindd_response)) {
224 DEBUG(0, ("wb_resp_read_len: Invalid response size "
225 "received: %d (expected at least%d)\n",
227 (int)sizeof(struct winbindd_response)));
231 return resp->length - buflen;
234 static void wb_resp_read_done(struct tevent_req *subreq)
236 struct tevent_req *req = tevent_req_callback_data(
237 subreq, struct tevent_req);
238 struct resp_read_state *state = tevent_req_data(
239 req, struct resp_read_state);
243 state->ret = read_packet_recv(subreq, state, &buf, &err);
245 if (state->ret == -1) {
246 tevent_req_error(req, err);
250 state->wb_resp = (struct winbindd_response *)buf;
252 if (state->wb_resp->length > sizeof(struct winbindd_response)) {
253 state->wb_resp->extra_data.data =
254 (char *)buf + sizeof(struct winbindd_response);
256 state->wb_resp->extra_data.data = NULL;
258 tevent_req_done(req);
261 ssize_t wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
262 struct winbindd_response **presp, int *err)
264 struct resp_read_state *state = tevent_req_data(
265 req, struct resp_read_state);
267 if (tevent_req_is_unix_error(req, err)) {
270 *presp = talloc_move(mem_ctx, &state->wb_resp);
274 struct resp_write_state {
279 static void wb_resp_write_done(struct tevent_req *subreq);
281 struct tevent_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
282 struct tevent_context *ev,
283 struct tevent_queue *queue, int fd,
284 struct winbindd_response *wb_resp)
286 struct tevent_req *req, *subreq;
287 struct resp_write_state *state;
290 req = tevent_req_create(mem_ctx, &state, struct resp_write_state);
295 state->iov[0].iov_base = wb_resp;
296 state->iov[0].iov_len = sizeof(struct winbindd_response);
298 if (wb_resp->length > sizeof(struct winbindd_response)) {
299 state->iov[1].iov_base = wb_resp->extra_data.data;
300 state->iov[1].iov_len =
301 wb_resp->length - sizeof(struct winbindd_response);
305 subreq = writev_send(state, ev, queue, fd, state->iov, count);
306 if (tevent_req_nomem(subreq, req)) {
307 return tevent_req_post(req, ev);
309 tevent_req_set_callback(subreq, wb_resp_write_done, req);
313 static void wb_resp_write_done(struct tevent_req *subreq)
315 struct tevent_req *req = tevent_req_callback_data(
316 subreq, struct tevent_req);
317 struct resp_write_state *state = tevent_req_data(
318 req, struct resp_write_state);
321 state->ret = writev_recv(subreq, &err);
323 if (state->ret < 0) {
324 tevent_req_error(req, err);
327 tevent_req_done(req);
330 ssize_t wb_resp_write_recv(struct tevent_req *req, int *err)
332 struct resp_write_state *state = tevent_req_data(
333 req, struct resp_write_state);
335 if (tevent_req_is_unix_error(req, err)) {