tevent: call epoll_panic() if EPOLL_CTL_DEL failed
[Samba/gebeck_regimport.git] / source3 / rpc_client / rpc_transport_tstream.c
blobec37c7d5cab95feb4cb6090fe2e99fe27ac9ae09
1 /*
2 * Unix SMB/CIFS implementation.
3 * RPC client transport over tstream
4 * Copyright (C) Simo Sorce 2010
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
20 #include "includes.h"
21 #include "../lib/util/tevent_ntstatus.h"
22 #include "rpc_client/rpc_transport.h"
23 #include "lib/tsocket/tsocket.h"
24 #include "libsmb/cli_np_tstream.h"
25 #include "cli_pipe.h"
27 #undef DBGC_CLASS
28 #define DBGC_CLASS DBGC_RPC_CLI
30 struct rpc_tstream_state {
31 struct tstream_context *stream;
32 struct tevent_queue *read_queue;
33 struct tevent_queue *write_queue;
34 unsigned int timeout;
37 static void rpc_tstream_disconnect(struct rpc_tstream_state *s)
39 TALLOC_FREE(s->stream);
42 static bool rpc_tstream_is_connected(void *priv)
44 struct rpc_tstream_state *transp =
45 talloc_get_type_abort(priv, struct rpc_tstream_state);
46 ssize_t ret;
48 if (!transp->stream) {
49 return false;
52 if (!tstream_is_cli_np(transp->stream)) {
53 return true;
56 ret = tstream_pending_bytes(transp->stream);
57 if (ret == -1) {
58 return false;
61 return true;
64 static unsigned int rpc_tstream_set_timeout(void *priv, unsigned int timeout)
66 struct rpc_tstream_state *transp =
67 talloc_get_type_abort(priv, struct rpc_tstream_state);
68 int orig_timeout;
69 bool ok;
71 ok = rpc_tstream_is_connected(transp);
72 if (!ok) {
73 return 0;
76 if (tstream_is_cli_np(transp->stream)) {
77 transp->timeout = timeout;
78 return tstream_cli_np_set_timeout(transp->stream, timeout);
81 orig_timeout = transp->timeout;
83 transp->timeout = timeout;
85 return orig_timeout;
88 struct rpc_tstream_next_vector_state {
89 uint8_t *buf;
90 size_t len;
91 off_t ofs;
92 size_t remaining;
95 static void rpc_tstream_next_vector_init(
96 struct rpc_tstream_next_vector_state *s,
97 uint8_t *buf, size_t len)
99 ZERO_STRUCTP(s);
101 s->buf = buf;
102 s->len = MIN(len, UINT16_MAX);
105 static int rpc_tstream_next_vector(struct tstream_context *stream,
106 void *private_data,
107 TALLOC_CTX *mem_ctx,
108 struct iovec **_vector,
109 size_t *count)
111 struct rpc_tstream_next_vector_state *state =
112 (struct rpc_tstream_next_vector_state *)private_data;
113 struct iovec *vector;
114 ssize_t pending;
115 size_t wanted;
117 if (state->ofs == state->len) {
118 *_vector = NULL;
119 *count = 0;
120 return 0;
123 pending = tstream_pending_bytes(stream);
124 if (pending == -1) {
125 return -1;
128 if (pending == 0 && state->ofs != 0) {
129 /* return a short read */
130 *_vector = NULL;
131 *count = 0;
132 return 0;
135 if (pending == 0) {
136 /* we want at least one byte and recheck again */
137 wanted = 1;
138 } else {
139 size_t missing = state->len - state->ofs;
140 if (pending > missing) {
141 /* there's more available */
142 state->remaining = pending - missing;
143 wanted = missing;
144 } else {
145 /* read what we can get and recheck in the next cycle */
146 wanted = pending;
150 vector = talloc_array(mem_ctx, struct iovec, 1);
151 if (!vector) {
152 return -1;
155 vector[0].iov_base = state->buf + state->ofs;
156 vector[0].iov_len = wanted;
158 state->ofs += wanted;
160 *_vector = vector;
161 *count = 1;
162 return 0;
165 struct rpc_tstream_read_state {
166 struct rpc_tstream_state *transp;
167 struct rpc_tstream_next_vector_state next_vector;
168 ssize_t nread;
171 static void rpc_tstream_read_done(struct tevent_req *subreq);
173 static struct tevent_req *rpc_tstream_read_send(TALLOC_CTX *mem_ctx,
174 struct tevent_context *ev,
175 uint8_t *data, size_t size,
176 void *priv)
178 struct rpc_tstream_state *transp =
179 talloc_get_type_abort(priv, struct rpc_tstream_state);
180 struct tevent_req *req, *subreq;
181 struct rpc_tstream_read_state *state;
182 struct timeval endtime;
184 req = tevent_req_create(mem_ctx, &state, struct rpc_tstream_read_state);
185 if (req == NULL) {
186 return NULL;
188 if (!rpc_tstream_is_connected(transp)) {
189 NTSTATUS status = NT_STATUS_CONNECTION_DISCONNECTED;
190 if (tstream_is_cli_np(transp->stream)) {
191 status = NT_STATUS_PIPE_DISCONNECTED;
193 tevent_req_nterror(req, status);
194 return tevent_req_post(req, ev);
196 state->transp = transp;
197 rpc_tstream_next_vector_init(&state->next_vector, data, size);
199 subreq = tstream_readv_pdu_queue_send(state, ev,
200 transp->stream,
201 transp->read_queue,
202 rpc_tstream_next_vector,
203 &state->next_vector);
204 if (subreq == NULL) {
205 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
206 return tevent_req_post(req, ev);
209 endtime = timeval_current_ofs_msec(transp->timeout);
210 if (!tevent_req_set_endtime(subreq, ev, endtime)) {
211 goto fail;
214 tevent_req_set_callback(subreq, rpc_tstream_read_done, req);
215 return req;
216 fail:
217 TALLOC_FREE(req);
218 return NULL;
221 static void rpc_tstream_read_done(struct tevent_req *subreq)
223 struct tevent_req *req =
224 tevent_req_callback_data(subreq, struct tevent_req);
225 struct rpc_tstream_read_state *state =
226 tevent_req_data(req, struct rpc_tstream_read_state);
227 int err;
229 state->nread = tstream_readv_pdu_queue_recv(subreq, &err);
230 TALLOC_FREE(subreq);
231 if (state->nread < 0) {
232 rpc_tstream_disconnect(state->transp);
233 tevent_req_nterror(req, map_nt_error_from_unix(err));
234 return;
236 tevent_req_done(req);
239 static NTSTATUS rpc_tstream_read_recv(struct tevent_req *req, ssize_t *size)
241 struct rpc_tstream_read_state *state = tevent_req_data(
242 req, struct rpc_tstream_read_state);
243 NTSTATUS status;
245 if (tevent_req_is_nterror(req, &status)) {
246 return status;
248 *size = state->nread;
249 return NT_STATUS_OK;
252 struct rpc_tstream_write_state {
253 struct tevent_context *ev;
254 struct rpc_tstream_state *transp;
255 struct iovec iov;
256 ssize_t nwritten;
259 static void rpc_tstream_write_done(struct tevent_req *subreq);
261 static struct tevent_req *rpc_tstream_write_send(TALLOC_CTX *mem_ctx,
262 struct tevent_context *ev,
263 const uint8_t *data, size_t size,
264 void *priv)
266 struct rpc_tstream_state *transp =
267 talloc_get_type_abort(priv, struct rpc_tstream_state);
268 struct tevent_req *req, *subreq;
269 struct rpc_tstream_write_state *state;
270 struct timeval endtime;
272 req = tevent_req_create(mem_ctx, &state, struct rpc_tstream_write_state);
273 if (req == NULL) {
274 return NULL;
276 if (!rpc_tstream_is_connected(transp)) {
277 NTSTATUS status = NT_STATUS_CONNECTION_DISCONNECTED;
278 if (tstream_is_cli_np(transp->stream)) {
279 status = NT_STATUS_PIPE_DISCONNECTED;
281 tevent_req_nterror(req, status);
282 return tevent_req_post(req, ev);
284 state->ev = ev;
285 state->transp = transp;
286 state->iov.iov_base = discard_const_p(void *, data);
287 state->iov.iov_len = size;
289 subreq = tstream_writev_queue_send(state, ev,
290 transp->stream,
291 transp->write_queue,
292 &state->iov, 1);
293 if (subreq == NULL) {
294 goto fail;
297 endtime = timeval_current_ofs_msec(transp->timeout);
298 if (!tevent_req_set_endtime(subreq, ev, endtime)) {
299 goto fail;
302 tevent_req_set_callback(subreq, rpc_tstream_write_done, req);
303 return req;
304 fail:
305 TALLOC_FREE(req);
306 return NULL;
309 static void rpc_tstream_write_done(struct tevent_req *subreq)
311 struct tevent_req *req =
312 tevent_req_callback_data(subreq, struct tevent_req);
313 struct rpc_tstream_write_state *state =
314 tevent_req_data(req, struct rpc_tstream_write_state);
315 int err;
317 state->nwritten = tstream_writev_queue_recv(subreq, &err);
318 TALLOC_FREE(subreq);
319 if (state->nwritten < 0) {
320 rpc_tstream_disconnect(state->transp);
321 tevent_req_nterror(req, map_nt_error_from_unix(err));
322 return;
324 tevent_req_done(req);
327 static NTSTATUS rpc_tstream_write_recv(struct tevent_req *req, ssize_t *sent)
329 struct rpc_tstream_write_state *state =
330 tevent_req_data(req, struct rpc_tstream_write_state);
331 NTSTATUS status;
333 if (tevent_req_is_nterror(req, &status)) {
334 return status;
336 *sent = state->nwritten;
337 return NT_STATUS_OK;
340 struct rpc_tstream_trans_state {
341 struct tevent_context *ev;
342 struct rpc_tstream_state *transp;
343 struct iovec req;
344 uint32_t max_rdata_len;
345 struct iovec rep;
348 static void rpc_tstream_trans_writev(struct tevent_req *subreq);
349 static void rpc_tstream_trans_readv_pdu(struct tevent_req *subreq);
351 static int rpc_tstream_trans_next_vector(struct tstream_context *stream,
352 void *private_data,
353 TALLOC_CTX *mem_ctx,
354 struct iovec **_vector,
355 size_t *count);
357 static struct tevent_req *rpc_tstream_trans_send(TALLOC_CTX *mem_ctx,
358 struct tevent_context *ev,
359 uint8_t *data, size_t data_len,
360 uint32_t max_rdata_len,
361 void *priv)
363 struct rpc_tstream_state *transp =
364 talloc_get_type_abort(priv, struct rpc_tstream_state);
365 struct tevent_req *req, *subreq;
366 struct rpc_tstream_trans_state *state;
367 struct timeval endtime;
368 bool use_trans = false;
370 req = tevent_req_create(mem_ctx, &state,
371 struct rpc_tstream_trans_state);
372 if (req == NULL) {
373 return NULL;
376 if (!rpc_tstream_is_connected(transp)) {
377 NTSTATUS status = NT_STATUS_CONNECTION_DISCONNECTED;
378 if (tstream_is_cli_np(transp->stream)) {
379 status = NT_STATUS_PIPE_DISCONNECTED;
381 tevent_req_nterror(req, status);
382 return tevent_req_post(req, ev);
384 state->ev = ev;
385 state->transp = transp;
386 state->req.iov_len = data_len;
387 state->req.iov_base = discard_const_p(void *, data);
388 state->max_rdata_len = max_rdata_len;
390 endtime = timeval_current_ofs_msec(transp->timeout);
392 if (tstream_is_cli_np(transp->stream)) {
393 use_trans = true;
395 if (tevent_queue_length(transp->write_queue) > 0) {
396 use_trans = false;
398 if (tevent_queue_length(transp->read_queue) > 0) {
399 use_trans = false;
402 if (use_trans) {
403 tstream_cli_np_use_trans(transp->stream);
406 subreq = tstream_writev_queue_send(state, ev,
407 transp->stream,
408 transp->write_queue,
409 &state->req, 1);
410 if (tevent_req_nomem(subreq, req)) {
411 return tevent_req_post(req, ev);
413 if (!tevent_req_set_endtime(subreq, ev, endtime)) {
414 return tevent_req_post(req, ev);
416 tevent_req_set_callback(subreq, rpc_tstream_trans_writev, req);
418 subreq = tstream_readv_pdu_queue_send(state, ev,
419 transp->stream,
420 transp->read_queue,
421 rpc_tstream_trans_next_vector,
422 state);
423 if (tevent_req_nomem(subreq, req)) {
424 return tevent_req_post(req, ev);
426 if (!tevent_req_set_endtime(subreq, ev, endtime)) {
427 return tevent_req_post(req, ev);
429 tevent_req_set_callback(subreq, rpc_tstream_trans_readv_pdu, req);
431 return req;
434 static void rpc_tstream_trans_writev(struct tevent_req *subreq)
436 struct tevent_req *req =
437 tevent_req_callback_data(subreq,
438 struct tevent_req);
439 struct rpc_tstream_trans_state *state =
440 tevent_req_data(req,
441 struct rpc_tstream_trans_state);
442 int ret;
443 int err;
445 ret = tstream_writev_queue_recv(subreq, &err);
446 TALLOC_FREE(subreq);
447 if (ret == -1) {
448 rpc_tstream_disconnect(state->transp);
449 tevent_req_nterror(req, map_nt_error_from_unix(err));
450 return;
454 static int rpc_tstream_trans_next_vector(struct tstream_context *stream,
455 void *private_data,
456 TALLOC_CTX *mem_ctx,
457 struct iovec **_vector,
458 size_t *count)
460 struct rpc_tstream_trans_state *state =
461 talloc_get_type_abort(private_data,
462 struct rpc_tstream_trans_state);
463 struct iovec *vector;
465 if (state->max_rdata_len == state->rep.iov_len) {
466 *_vector = NULL;
467 *count = 0;
468 return 0;
471 state->rep.iov_base = talloc_array(state, uint8_t,
472 state->max_rdata_len);
473 if (state->rep.iov_base == NULL) {
474 return -1;
476 state->rep.iov_len = state->max_rdata_len;
478 vector = talloc_array(mem_ctx, struct iovec, 1);
479 if (!vector) {
480 return -1;
483 vector[0] = state->rep;
485 *_vector = vector;
486 *count = 1;
487 return 0;
490 static void rpc_tstream_trans_readv_pdu(struct tevent_req *subreq)
492 struct tevent_req *req =
493 tevent_req_callback_data(subreq,
494 struct tevent_req);
495 struct rpc_tstream_trans_state *state =
496 tevent_req_data(req,
497 struct rpc_tstream_trans_state);
498 int ret;
499 int err;
501 ret = tstream_readv_pdu_queue_recv(subreq, &err);
502 TALLOC_FREE(subreq);
503 if (ret == -1) {
504 rpc_tstream_disconnect(state->transp);
505 tevent_req_nterror(req, map_nt_error_from_unix(err));
506 return;
509 tevent_req_done(req);
512 static NTSTATUS rpc_tstream_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
513 uint8_t **prdata, uint32_t *prdata_len)
515 struct rpc_tstream_trans_state *state =
516 tevent_req_data(req,
517 struct rpc_tstream_trans_state);
518 NTSTATUS status;
520 if (tevent_req_is_nterror(req, &status)) {
521 return status;
524 *prdata = (uint8_t *)talloc_move(mem_ctx, &state->rep.iov_base);
525 *prdata_len = state->rep.iov_len;
526 return NT_STATUS_OK;
530 * @brief Initialize a tstream transport facility
531 * NOTE: this function will talloc_steal, the stream and the queues.
533 * @param mem_ctx - memory context used to allocate the transport
534 * @param stream - a ready to use tstream
535 * @param presult - the transport structure
537 * @return - a NT Status error code.
539 NTSTATUS rpc_transport_tstream_init(TALLOC_CTX *mem_ctx,
540 struct tstream_context **stream,
541 struct rpc_cli_transport **presult)
543 struct rpc_cli_transport *result;
544 struct rpc_tstream_state *state;
546 result = talloc(mem_ctx, struct rpc_cli_transport);
547 if (result == NULL) {
548 return NT_STATUS_NO_MEMORY;
550 state = talloc(result, struct rpc_tstream_state);
551 if (state == NULL) {
552 TALLOC_FREE(result);
553 return NT_STATUS_NO_MEMORY;
555 result->priv = state;
557 state->read_queue = tevent_queue_create(state, "read_queue");
558 if (state->read_queue == NULL) {
559 TALLOC_FREE(result);
560 return NT_STATUS_NO_MEMORY;
562 state->write_queue = tevent_queue_create(state, "write_queue");
563 if (state->write_queue == NULL) {
564 TALLOC_FREE(result);
565 return NT_STATUS_NO_MEMORY;
568 state->stream = talloc_move(state, stream);
569 state->timeout = 10000; /* 10 seconds. */
571 if (tstream_is_cli_np(state->stream)) {
572 result->trans_send = rpc_tstream_trans_send;
573 result->trans_recv = rpc_tstream_trans_recv;
574 } else {
575 result->trans_send = NULL;
576 result->trans_recv = NULL;
578 result->write_send = rpc_tstream_write_send;
579 result->write_recv = rpc_tstream_write_recv;
580 result->read_send = rpc_tstream_read_send;
581 result->read_recv = rpc_tstream_read_recv;
582 result->is_connected = rpc_tstream_is_connected;
583 result->set_timeout = rpc_tstream_set_timeout;
585 *presult = result;
586 return NT_STATUS_OK;
589 struct cli_state *rpc_pipe_np_smb_conn(struct rpc_pipe_client *p)
591 struct rpc_tstream_state *transp =
592 talloc_get_type_abort(p->transport->priv,
593 struct rpc_tstream_state);
594 bool ok;
596 ok = rpccli_is_connected(p);
597 if (!ok) {
598 return NULL;
601 if (!tstream_is_cli_np(transp->stream)) {
602 return NULL;
605 return tstream_cli_np_get_cli_state(transp->stream);