1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22
23 /*
24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
25 * Use is subject to license terms.
26 */
27 /*
28 * Copyright 2014 Nexenta Systems, Inc. All rights reserved.
29 */
30
31 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
32 /* All Rights Reserved */
33 /*
34 * Portions of this source code were derived from Berkeley
35 * 4.3 BSD under license from the Regents of the University of
36 * California.
37 */
38
39 /*
40 * Implements a connectionless client side RPC.
41 */
42
43 #include "mt.h"
44 #include "rpc_mt.h"
45 #include <assert.h>
46 #include <rpc/rpc.h>
47 #include <errno.h>
48 #include <sys/poll.h>
49 #include <syslog.h>
50 #include <sys/types.h>
51 #include <sys/kstat.h>
52 #include <sys/time.h>
53 #include <stdlib.h>
54 #include <unistd.h>
55 #include <sys/types.h>
56 #include <sys/stat.h>
57 #include <strings.h>
58
59
60 extern int __rpc_timeval_to_msec(struct timeval *);
61 extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
62 extern bool_t __rpc_gss_wrap(AUTH *, char *, uint_t, XDR *, bool_t (*)(),
63 caddr_t);
64 extern bool_t __rpc_gss_unwrap(AUTH *, XDR *, bool_t (*)(), caddr_t);
65
66
67 static struct clnt_ops *clnt_dg_ops(void);
68 static bool_t time_not_ok(struct timeval *);
69
70 /*
71 * This machinery implements per-fd locks for MT-safety. It is not
72 * sufficient to do per-CLIENT handle locks for MT-safety because a
73 * user may create more than one CLIENT handle with the same fd behind
74 * it.
75 *
76 * The current implementation holds locks across the entire RPC and reply,
77 * including retransmissions. Yes, this is silly, and as soon as this
78 * code is proven to work, this should be the first thing fixed. One step
79 * at a time.
80 */
81
82 /*
83 * FD Lock handle used by various MT sync. routines
84 */
85 static mutex_t dgtbl_lock = DEFAULTMUTEX;
86 static void *dgtbl = NULL;
87
88 static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory";
89
90
91 #define MCALL_MSG_SIZE 24
92
93 /*
94 * Private data kept per client handle
95 */
96 struct cu_data {
97 int cu_fd; /* connections fd */
98 bool_t cu_closeit; /* opened by library */
99 struct netbuf cu_raddr; /* remote address */
100 struct timeval cu_wait; /* retransmit interval */
101 struct timeval cu_total; /* total time for the call */
102 struct rpc_err cu_error;
103 struct t_unitdata *cu_tr_data;
104 XDR cu_outxdrs;
105 char *cu_outbuf_start;
106 char cu_outbuf[MCALL_MSG_SIZE];
107 uint_t cu_xdrpos;
108 uint_t cu_sendsz; /* send size */
109 uint_t cu_recvsz; /* recv size */
110 struct pollfd pfdp;
111 char cu_inbuf[1];
112 };
113
114 static int _rcv_unitdata_err(struct cu_data *cu);
115
116 /*
117 * Connection less client creation returns with client handle parameters.
118 * Default options are set, which the user can change using clnt_control().
119 * fd should be open and bound.
120 * NB: The rpch->cl_auth is initialized to null authentication.
121 * Caller may wish to set this something more useful.
122 *
123 * sendsz and recvsz are the maximum allowable packet sizes that can be
124 * sent and received. Normally they are the same, but they can be
125 * changed to improve the program efficiency and buffer allocation.
126 * If they are 0, use the transport default.
127 *
128 * If svcaddr is NULL, returns NULL.
129 */
130 CLIENT *
131 clnt_dg_create(const int fd, struct netbuf *svcaddr, const rpcprog_t program,
132 const rpcvers_t version, const uint_t sendsz, const uint_t recvsz)
133 {
134 CLIENT *cl = NULL; /* client handle */
135 struct cu_data *cu = NULL; /* private data */
136 struct t_unitdata *tr_data;
137 struct t_info tinfo;
138 struct timeval now;
139 struct rpc_msg call_msg;
140 uint_t ssz;
141 uint_t rsz;
142
143 sig_mutex_lock(&dgtbl_lock);
144 if ((dgtbl == NULL) && ((dgtbl = rpc_fd_init()) == NULL)) {
145 sig_mutex_unlock(&dgtbl_lock);
146 goto err1;
147 }
148 sig_mutex_unlock(&dgtbl_lock);
149
150 if (svcaddr == NULL) {
151 rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
152 return (NULL);
153 }
154 if (t_getinfo(fd, &tinfo) == -1) {
155 rpc_createerr.cf_stat = RPC_TLIERROR;
156 rpc_createerr.cf_error.re_errno = 0;
157 rpc_createerr.cf_error.re_terrno = t_errno;
158 return (NULL);
159 }
160 /*
161 * Setup to rcv datagram error, we ignore any errors returned from
162 * __rpc_tli_set_options() as SO_DGRAM_ERRIND is only relevant to
163 * udp/udp6 transports and this point in the code we only know that
164 * we are using a connection less transport.
165 */
166 if (tinfo.servtype == T_CLTS)
167 (void) __rpc_tli_set_options(fd, SOL_SOCKET, SO_DGRAM_ERRIND,
168 1);
169 /*
170 * Find the receive and the send size
171 */
172 ssz = __rpc_get_t_size((int)sendsz, tinfo.tsdu);
173 rsz = __rpc_get_t_size((int)recvsz, tinfo.tsdu);
174 if ((ssz == 0) || (rsz == 0)) {
175 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */
176 rpc_createerr.cf_error.re_errno = 0;
177 rpc_createerr.cf_error.re_terrno = 0;
178 return (NULL);
179 }
180
181 if ((cl = malloc(sizeof (CLIENT))) == NULL)
182 goto err1;
183 /*
184 * Should be multiple of 4 for XDR.
185 */
186 ssz = ((ssz + 3) / 4) * 4;
187 rsz = ((rsz + 3) / 4) * 4;
188 cu = malloc(sizeof (*cu) + ssz + rsz);
189 if (cu == NULL)
190 goto err1;
191 if ((cu->cu_raddr.buf = malloc(svcaddr->len)) == NULL)
192 goto err1;
193 (void) memcpy(cu->cu_raddr.buf, svcaddr->buf, (size_t)svcaddr->len);
194 cu->cu_raddr.len = cu->cu_raddr.maxlen = svcaddr->len;
195 cu->cu_outbuf_start = &cu->cu_inbuf[rsz];
196 /* Other values can also be set through clnt_control() */
197 cu->cu_wait.tv_sec = 15; /* heuristically chosen */
198 cu->cu_wait.tv_usec = 0;
199 cu->cu_total.tv_sec = -1;
200 cu->cu_total.tv_usec = -1;
201 cu->cu_sendsz = ssz;
202 cu->cu_recvsz = rsz;
203 (void) gettimeofday(&now, NULL);
204 call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
205 call_msg.rm_call.cb_prog = program;
206 call_msg.rm_call.cb_vers = version;
207 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, ssz, XDR_ENCODE);
208 if (!xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) {
209 rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */
210 rpc_createerr.cf_error.re_errno = 0;
211 rpc_createerr.cf_error.re_terrno = 0;
212 goto err2;
213 }
214 cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs));
215 XDR_DESTROY(&(cu->cu_outxdrs));
216 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf_start, ssz, XDR_ENCODE);
217 /* LINTED pointer alignment */
218 tr_data = (struct t_unitdata *)t_alloc(fd, T_UNITDATA, T_ADDR | T_OPT);
219 if (tr_data == NULL) {
220 goto err1;
221 }
222 tr_data->udata.maxlen = cu->cu_recvsz;
223 tr_data->udata.buf = cu->cu_inbuf;
224 cu->cu_tr_data = tr_data;
225
226 /*
227 * By default, closeit is always FALSE. It is users responsibility
228 * to do a t_close on it, else the user may use clnt_control
229 * to let clnt_destroy do it for him/her.
230 */
231 cu->cu_closeit = FALSE;
232 cu->cu_fd = fd;
233 cl->cl_ops = clnt_dg_ops();
234 cl->cl_private = (caddr_t)cu;
235 cl->cl_auth = authnone_create();
236 cl->cl_tp = NULL;
237 cl->cl_netid = NULL;
238 cu->pfdp.fd = cu->cu_fd;
239 cu->pfdp.events = MASKVAL;
240 return (cl);
241 err1:
242 (void) syslog(LOG_ERR, mem_err_clnt_dg);
243 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
244 rpc_createerr.cf_error.re_errno = errno;
245 rpc_createerr.cf_error.re_terrno = 0;
246 err2:
247 if (cl) {
248 free(cl);
249 if (cu) {
250 free(cu->cu_raddr.buf);
251 free(cu);
252 }
253 }
254 return (NULL);
255 }
256
257 static enum clnt_stat
258 clnt_dg_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, caddr_t argsp,
259 xdrproc_t xresults, caddr_t resultsp, struct timeval utimeout)
260 {
261 /* LINTED pointer alignment */
262 struct cu_data *cu = (struct cu_data *)cl->cl_private;
263 XDR *xdrs;
264 int outlen;
265 struct rpc_msg reply_msg;
266 XDR reply_xdrs;
267 struct timeval time_waited;
268 bool_t ok;
269 int nrefreshes = 2; /* number of times to refresh cred */
270 struct timeval timeout;
271 struct timeval retransmit_time;
272 struct timeval poll_time;
273 struct timeval startime, curtime;
274 struct t_unitdata tu_data;
275 int res; /* result of operations */
276 uint32_t x_id;
277
278 if (rpc_fd_lock(dgtbl, cu->cu_fd)) {
279 rpc_callerr.re_status = RPC_FAILED;
280 rpc_callerr.re_errno = errno;
281 rpc_fd_unlock(dgtbl, cu->cu_fd);
282 return (RPC_FAILED);
283 }
284
285 if (cu->cu_total.tv_usec == -1) {
286 timeout = utimeout; /* use supplied timeout */
287 } else {
288 timeout = cu->cu_total; /* use default timeout */
289 }
290
291 time_waited.tv_sec = 0;
292 time_waited.tv_usec = 0;
293 retransmit_time = cu->cu_wait;
294
295 tu_data.addr = cu->cu_raddr;
296
297 call_again:
298 xdrs = &(cu->cu_outxdrs);
299 xdrs->x_op = XDR_ENCODE;
300 XDR_SETPOS(xdrs, 0);
301 /*
302 * Due to little endian byte order, it is necessary to convert to host
303 * format before incrementing xid.
304 */
305 /* LINTED pointer cast */
306 x_id = ntohl(*(uint32_t *)(cu->cu_outbuf)) + 1; /* set XID */
307 /* LINTED pointer cast */
308 *(uint32_t *)cu->cu_outbuf = htonl(x_id);
309
310 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) {
311 if ((!XDR_PUTBYTES(xdrs, cu->cu_outbuf, cu->cu_xdrpos)) ||
312 (!XDR_PUTINT32(xdrs, (int32_t *)&proc)) ||
313 (!AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
314 (!xargs(xdrs, argsp))) {
315 rpc_fd_unlock(dgtbl, cu->cu_fd);
316 return (rpc_callerr.re_status = RPC_CANTENCODEARGS);
317 }
318 } else {
319 /* LINTED pointer alignment */
320 uint32_t *u = (uint32_t *)&cu->cu_outbuf[cu->cu_xdrpos];
321 IXDR_PUT_U_INT32(u, proc);
322 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outbuf,
323 ((char *)u) - cu->cu_outbuf, xdrs, xargs, argsp)) {
324 rpc_fd_unlock(dgtbl, cu->cu_fd);
325 return (rpc_callerr.re_status = RPC_CANTENCODEARGS);
326 }
327 }
328 outlen = (int)XDR_GETPOS(xdrs);
329
330 send_again:
331 tu_data.udata.buf = cu->cu_outbuf_start;
332 tu_data.udata.len = outlen;
333 tu_data.opt.len = 0;
334 if (t_sndudata(cu->cu_fd, &tu_data) == -1) {
335 rpc_callerr.re_terrno = t_errno;
336 rpc_callerr.re_errno = errno;
337 rpc_fd_unlock(dgtbl, cu->cu_fd);
338 return (rpc_callerr.re_status = RPC_CANTSEND);
339 }
340
341 /*
342 * Hack to provide rpc-based message passing
343 */
344 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
345 rpc_fd_unlock(dgtbl, cu->cu_fd);
346 return (rpc_callerr.re_status = RPC_TIMEDOUT);
347 }
348 /*
349 * sub-optimal code appears here because we have
350 * some clock time to spare while the packets are in flight.
351 * (We assume that this is actually only executed once.)
352 */
353 reply_msg.acpted_rply.ar_verf = _null_auth;
354 reply_msg.acpted_rply.ar_results.where = NULL;
355 reply_msg.acpted_rply.ar_results.proc = xdr_void;
356
357 /*
358 * Set polling time so that we don't wait for
359 * longer than specified by the total time to wait,
360 * or the retransmit time.
361 */
362 poll_time.tv_sec = timeout.tv_sec - time_waited.tv_sec;
363 poll_time.tv_usec = timeout.tv_usec - time_waited.tv_usec;
364 while (poll_time.tv_usec < 0) {
365 poll_time.tv_usec += 1000000;
366 poll_time.tv_sec--;
367 }
368
369 if (poll_time.tv_sec < 0 || (poll_time.tv_sec == 0 &&
370 poll_time.tv_usec == 0)) {
371 /*
372 * this could happen if time_waited >= timeout
373 */
374 rpc_fd_unlock(dgtbl, cu->cu_fd);
375 return (rpc_callerr.re_status = RPC_TIMEDOUT);
376 }
377
378 if (poll_time.tv_sec > retransmit_time.tv_sec ||
379 (poll_time.tv_sec == retransmit_time.tv_sec &&
380 poll_time.tv_usec > retransmit_time.tv_usec))
381 poll_time = retransmit_time;
382
383
384 for (;;) {
385
386 (void) gettimeofday(&startime, NULL);
387
388 switch (poll(&cu->pfdp, 1,
389 __rpc_timeval_to_msec(&poll_time))) {
390 case -1:
391 if (errno != EINTR && errno != EAGAIN) {
392 rpc_callerr.re_errno = errno;
393 rpc_callerr.re_terrno = 0;
394 rpc_fd_unlock(dgtbl, cu->cu_fd);
395 return (rpc_callerr.re_status = RPC_CANTRECV);
396 }
397 /*FALLTHROUGH*/
398
399 case 0:
400 /*
401 * update time waited
402 */
403 timeout: (void) gettimeofday(&curtime, NULL);
404 time_waited.tv_sec += curtime.tv_sec - startime.tv_sec;
405 time_waited.tv_usec += curtime.tv_usec -
406 startime.tv_usec;
407 while (time_waited.tv_usec >= 1000000) {
408 time_waited.tv_usec -= 1000000;
409 time_waited.tv_sec++;
410 }
411 while (time_waited.tv_usec < 0) {
412 time_waited.tv_usec += 1000000;
413 time_waited.tv_sec--;
414 }
415
416 /*
417 * decrement time left to poll by same amount
418 */
419 poll_time.tv_sec -= curtime.tv_sec - startime.tv_sec;
420 poll_time.tv_usec -= curtime.tv_usec - startime.tv_usec;
421 while (poll_time.tv_usec >= 1000000) {
422 poll_time.tv_usec -= 1000000;
423 poll_time.tv_sec++;
424 }
425 while (poll_time.tv_usec < 0) {
426 poll_time.tv_usec += 1000000;
427 poll_time.tv_sec--;
428 }
429
430 /*
431 * if there's time left to poll, poll again
432 */
433 if (poll_time.tv_sec > 0 ||
434 (poll_time.tv_sec == 0 && poll_time.tv_usec > 0))
435 continue;
436
437 /*
438 * if there's more time left, retransmit;
439 * otherwise, return timeout error
440 */
441 if (time_waited.tv_sec < timeout.tv_sec ||
442 (time_waited.tv_sec == timeout.tv_sec &&
443 time_waited.tv_usec < timeout.tv_usec)) {
444 /*
445 * update retransmit_time
446 */
447 retransmit_time.tv_usec *= 2;
448 retransmit_time.tv_sec *= 2;
449 while (retransmit_time.tv_usec >= 1000000) {
450 retransmit_time.tv_usec -= 1000000;
451 retransmit_time.tv_sec++;
452 }
453 if (retransmit_time.tv_sec >= RPC_MAX_BACKOFF) {
454 retransmit_time.tv_sec =
455 RPC_MAX_BACKOFF;
456 retransmit_time.tv_usec = 0;
457 }
458 /*
459 * redo AUTH_MARSHAL if AUTH_DES or RPCSEC_GSS.
460 */
461 if (cl->cl_auth->ah_cred.oa_flavor ==
462 AUTH_DES ||
463 cl->cl_auth->ah_cred.oa_flavor ==
464 RPCSEC_GSS)
465 goto call_again;
466 else
467 goto send_again;
468 }
469 rpc_fd_unlock(dgtbl, cu->cu_fd);
470 return (rpc_callerr.re_status = RPC_TIMEDOUT);
471
472 default:
473 break;
474 }
475
476 if (cu->pfdp.revents & POLLNVAL || (cu->pfdp.revents == 0)) {
477 rpc_callerr.re_status = RPC_CANTRECV;
478 /*
479 * Note: we're faking errno here because we
480 * previously would have expected select() to
481 * return -1 with errno EBADF. Poll(BA_OS)
482 * returns 0 and sets the POLLNVAL revents flag
483 * instead.
484 */
485 rpc_callerr.re_errno = errno = EBADF;
486 rpc_fd_unlock(dgtbl, cu->cu_fd);
487 return (-1);
488 }
489
490 /* We have some data now */
491 do {
492 int moreflag; /* flag indicating more data */
493
494 moreflag = 0;
495
496 res = t_rcvudata(cu->cu_fd, cu->cu_tr_data, &moreflag);
497
498 if (moreflag & T_MORE) {
499 /*
500 * Drop this packet. I aint got any
501 * more space.
502 */
503 res = -1;
504 /* I should not really be doing this */
505 errno = 0;
506 /*
507 * XXX: Not really Buffer overflow in the
508 * sense of TLI.
509 */
510 t_errno = TBUFOVFLW;
511 }
512 } while (res < 0 && (t_errno == TSYSERR && errno == EINTR));
513 if (res < 0) {
514 int err, errnoflag = FALSE;
515 #ifdef sun
516 if (t_errno == TSYSERR && errno == EWOULDBLOCK)
517 #else
518 if (t_errno == TSYSERR && errno == EAGAIN)
519 #endif
520 continue;
521 if (t_errno == TLOOK) {
522 if ((err = _rcv_unitdata_err(cu)) == 0)
523 continue;
524 else if (err == 1)
525 errnoflag = TRUE;
526 } else {
527 rpc_callerr.re_terrno = t_errno;
528 }
529 if (errnoflag == FALSE)
530 rpc_callerr.re_errno = errno;
531 rpc_fd_unlock(dgtbl, cu->cu_fd);
532 return (rpc_callerr.re_status = RPC_CANTRECV);
533 }
534 if (cu->cu_tr_data->udata.len < (uint_t)sizeof (uint32_t))
535 continue;
536 /* see if reply transaction id matches sent id */
537 /* LINTED pointer alignment */
538 if (*((uint32_t *)(cu->cu_inbuf)) !=
539 /* LINTED pointer alignment */
540 *((uint32_t *)(cu->cu_outbuf)))
541 goto timeout;
542 /* we now assume we have the proper reply */
543 break;
544 }
545
546 /*
547 * now decode and validate the response
548 */
549
550 xdrmem_create(&reply_xdrs, cu->cu_inbuf,
551 (uint_t)cu->cu_tr_data->udata.len, XDR_DECODE);
552 ok = xdr_replymsg(&reply_xdrs, &reply_msg);
553 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */
554 if (ok) {
555 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
556 (reply_msg.acpted_rply.ar_stat == SUCCESS))
557 rpc_callerr.re_status = RPC_SUCCESS;
558 else
559 __seterr_reply(&reply_msg, &(rpc_callerr));
560
561 if (rpc_callerr.re_status == RPC_SUCCESS) {
562 if (!AUTH_VALIDATE(cl->cl_auth,
563 &reply_msg.acpted_rply.ar_verf)) {
564 rpc_callerr.re_status = RPC_AUTHERROR;
565 rpc_callerr.re_why = AUTH_INVALIDRESP;
566 } else if (cl->cl_auth->ah_cred.oa_flavor !=
567 RPCSEC_GSS) {
568 if (!(*xresults)(&reply_xdrs, resultsp)) {
569 if (rpc_callerr.re_status ==
570 RPC_SUCCESS)
571 rpc_callerr.re_status =
572 RPC_CANTDECODERES;
573 }
574 } else if (!__rpc_gss_unwrap(cl->cl_auth, &reply_xdrs,
575 xresults, resultsp)) {
576 if (rpc_callerr.re_status == RPC_SUCCESS)
577 rpc_callerr.re_status =
578 RPC_CANTDECODERES;
579 }
580 } /* end successful completion */
581 /*
582 * If unsuccesful AND error is an authentication error
583 * then refresh credentials and try again, else break
584 */
585 else if (rpc_callerr.re_status == RPC_AUTHERROR)
586 /* maybe our credentials need to be refreshed ... */
587 if (nrefreshes-- &&
588 AUTH_REFRESH(cl->cl_auth, &reply_msg))
589 goto call_again;
590 else
591 /*
592 * We are setting rpc_callerr here given that
593 * libnsl is not reentrant thereby
594 * reinitializing the TSD. If not set here then
595 * success could be returned even though refresh
596 * failed.
597 */
598 rpc_callerr.re_status = RPC_AUTHERROR;
599
600 /* end of unsuccessful completion */
601 /* free verifier */
602 if (reply_msg.rm_reply.rp_stat == MSG_ACCEPTED &&
603 reply_msg.acpted_rply.ar_verf.oa_base != NULL) {
604 xdrs->x_op = XDR_FREE;
605 (void) xdr_opaque_auth(xdrs,
606 &(reply_msg.acpted_rply.ar_verf));
607 }
608 } /* end of valid reply message */
609 else {
610 rpc_callerr.re_status = RPC_CANTDECODERES;
611
612 }
613 rpc_fd_unlock(dgtbl, cu->cu_fd);
614 return (rpc_callerr.re_status);
615 }
616
617 static enum clnt_stat
618 clnt_dg_send(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, caddr_t argsp)
619 {
620 /* LINTED pointer alignment */
621 struct cu_data *cu = (struct cu_data *)cl->cl_private;
622 XDR *xdrs;
623 int outlen;
624 struct t_unitdata tu_data;
625 uint32_t x_id;
626
627 if (rpc_fd_lock(dgtbl, cu->cu_fd)) {
628 rpc_callerr.re_status = RPC_FAILED;
629 rpc_callerr.re_errno = errno;
630 rpc_fd_unlock(dgtbl, cu->cu_fd);
631 return (RPC_FAILED);
632 }
633
634 tu_data.addr = cu->cu_raddr;
635
636 xdrs = &(cu->cu_outxdrs);
637 xdrs->x_op = XDR_ENCODE;
638 XDR_SETPOS(xdrs, 0);
639 /*
640 * Due to little endian byte order, it is necessary to convert to host
641 * format before incrementing xid.
642 */
643 /* LINTED pointer alignment */
644 x_id = ntohl(*(uint32_t *)(cu->cu_outbuf)) + 1; /* set XID */
645 /* LINTED pointer cast */
646 *(uint32_t *)cu->cu_outbuf = htonl(x_id);
647
648 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) {
649 if ((!XDR_PUTBYTES(xdrs, cu->cu_outbuf, cu->cu_xdrpos)) ||
650 (!XDR_PUTINT32(xdrs, (int32_t *)&proc)) ||
651 (!AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
652 (!xargs(xdrs, argsp))) {
653 rpc_fd_unlock(dgtbl, cu->cu_fd);
654 return (rpc_callerr.re_status = RPC_CANTENCODEARGS);
655 }
656 } else {
657 /* LINTED pointer alignment */
658 uint32_t *u = (uint32_t *)&cu->cu_outbuf[cu->cu_xdrpos];
659 IXDR_PUT_U_INT32(u, proc);
660 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outbuf,
661 ((char *)u) - cu->cu_outbuf, xdrs, xargs, argsp)) {
662 rpc_fd_unlock(dgtbl, cu->cu_fd);
663 return (rpc_callerr.re_status = RPC_CANTENCODEARGS);
664 }
665 }
666 outlen = (int)XDR_GETPOS(xdrs);
667
668 tu_data.udata.buf = cu->cu_outbuf_start;
669 tu_data.udata.len = outlen;
670 tu_data.opt.len = 0;
671 if (t_sndudata(cu->cu_fd, &tu_data) == -1) {
672 rpc_callerr.re_terrno = t_errno;
673 rpc_callerr.re_errno = errno;
674 rpc_fd_unlock(dgtbl, cu->cu_fd);
675 return (rpc_callerr.re_status = RPC_CANTSEND);
676 }
677
678 rpc_fd_unlock(dgtbl, cu->cu_fd);
679 return (rpc_callerr.re_status = RPC_SUCCESS);
680 }
681
682 static void
683 clnt_dg_geterr(CLIENT *cl, struct rpc_err *errp)
684 {
685 /* LINTED pointer alignment */
686 struct cu_data *cu = (struct cu_data *)cl->cl_private;
687
688 *errp = rpc_callerr;
689 }
690
691 static bool_t
692 clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t res_ptr)
693 {
694 /* LINTED pointer alignment */
695 struct cu_data *cu = (struct cu_data *)cl->cl_private;
696 XDR *xdrs = &(cu->cu_outxdrs);
697 bool_t stat;
698
699 (void) rpc_fd_lock(dgtbl, cu->cu_fd);
700 xdrs->x_op = XDR_FREE;
701 stat = (*xdr_res)(xdrs, res_ptr);
702 rpc_fd_unlock(dgtbl, cu->cu_fd);
703 return (stat);
704 }
705
706 /* ARGSUSED */
707 static void
708 clnt_dg_abort(CLIENT *h)
709 {
710 }
711
712 static bool_t
713 clnt_dg_control(CLIENT *cl, int request, char *info)
714 {
715 /* LINTED pointer alignment */
716 struct cu_data *cu = (struct cu_data *)cl->cl_private;
717 struct netbuf *addr;
718 if (rpc_fd_lock(dgtbl, cu->cu_fd)) {
719 rpc_fd_unlock(dgtbl, cu->cu_fd);
720 return (FALSE);
721 }
722
723 switch (request) {
724 case CLSET_FD_CLOSE:
725 cu->cu_closeit = TRUE;
726 rpc_fd_unlock(dgtbl, cu->cu_fd);
727 return (TRUE);
728 case CLSET_FD_NCLOSE:
729 cu->cu_closeit = FALSE;
730 rpc_fd_unlock(dgtbl, cu->cu_fd);
731 return (TRUE);
732 }
733
734 /* for other requests which use info */
735 if (info == NULL) {
736 rpc_fd_unlock(dgtbl, cu->cu_fd);
737 return (FALSE);
738 }
739 switch (request) {
740 case CLSET_TIMEOUT:
741 /* LINTED pointer alignment */
742 if (time_not_ok((struct timeval *)info)) {
743 rpc_fd_unlock(dgtbl, cu->cu_fd);
744 return (FALSE);
745 }
746 /* LINTED pointer alignment */
747 cu->cu_total = *(struct timeval *)info;
748 break;
749 case CLGET_TIMEOUT:
750 /* LINTED pointer alignment */
751 *(struct timeval *)info = cu->cu_total;
752 break;
753 case CLGET_SERVER_ADDR: /* Give him the fd address */
754 /* Now obsolete. Only for backword compatibility */
755 (void) memcpy(info, cu->cu_raddr.buf, (size_t)cu->cu_raddr.len);
756 break;
757 case CLSET_RETRY_TIMEOUT:
758 /* LINTED pointer alignment */
759 if (time_not_ok((struct timeval *)info)) {
760 rpc_fd_unlock(dgtbl, cu->cu_fd);
761 return (FALSE);
762 }
763 /* LINTED pointer alignment */
764 cu->cu_wait = *(struct timeval *)info;
765 break;
766 case CLGET_RETRY_TIMEOUT:
767 /* LINTED pointer alignment */
768 *(struct timeval *)info = cu->cu_wait;
769 break;
770 case CLGET_FD:
771 /* LINTED pointer alignment */
772 *(int *)info = cu->cu_fd;
773 break;
774 case CLGET_SVC_ADDR:
775 /* LINTED pointer alignment */
776 *(struct netbuf *)info = cu->cu_raddr;
777 break;
778 case CLSET_SVC_ADDR: /* set to new address */
779 /* LINTED pointer alignment */
780 addr = (struct netbuf *)info;
781 if (cu->cu_raddr.maxlen < addr->len) {
782 free(cu->cu_raddr.buf);
783 if ((cu->cu_raddr.buf = malloc(addr->len)) == NULL) {
784 rpc_fd_unlock(dgtbl, cu->cu_fd);
785 return (FALSE);
786 }
787 cu->cu_raddr.maxlen = addr->len;
788 }
789 cu->cu_raddr.len = addr->len;
790 (void) memcpy(cu->cu_raddr.buf, addr->buf, addr->len);
791 break;
792 case CLGET_XID:
793 /*
794 * use the knowledge that xid is the
795 * first element in the call structure *.
796 * This will get the xid of the PREVIOUS call
797 */
798 /* LINTED pointer alignment */
799 *(uint32_t *)info = ntohl(*(uint32_t *)cu->cu_outbuf);
800 break;
801
802 case CLSET_XID:
803 /* This will set the xid of the NEXT call */
804 /* LINTED pointer alignment */
805 *(uint32_t *)cu->cu_outbuf = htonl(*(uint32_t *)info - 1);
806 /* decrement by 1 as clnt_dg_call() increments once */
807 break;
808
809 case CLGET_VERS:
810 /*
811 * This RELIES on the information that, in the call body,
812 * the version number field is the fifth field from the
813 * begining of the RPC header. MUST be changed if the
814 * call_struct is changed
815 */
816 /* LINTED pointer alignment */
817 *(uint32_t *)info = ntohl(*(uint32_t *)(cu->cu_outbuf +
818 4 * BYTES_PER_XDR_UNIT));
819 break;
820
821 case CLSET_VERS:
822 /* LINTED pointer alignment */
823 *(uint32_t *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT) =
824 /* LINTED pointer alignment */
825 htonl(*(uint32_t *)info);
826 break;
827
828 case CLGET_PROG:
829 /*
830 * This RELIES on the information that, in the call body,
831 * the program number field is the fourth field from the
832 * begining of the RPC header. MUST be changed if the
833 * call_struct is changed
834 */
835 /* LINTED pointer alignment */
836 *(uint32_t *)info = ntohl(*(uint32_t *)(cu->cu_outbuf +
837 3 * BYTES_PER_XDR_UNIT));
838 break;
839
840 case CLSET_PROG:
841 /* LINTED pointer alignment */
842 *(uint32_t *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) =
843 /* LINTED pointer alignment */
844 htonl(*(uint32_t *)info);
845 break;
846
847 default:
848 rpc_fd_unlock(dgtbl, cu->cu_fd);
849 return (FALSE);
850 }
851 rpc_fd_unlock(dgtbl, cu->cu_fd);
852 return (TRUE);
853 }
854
855 static void
856 clnt_dg_destroy(CLIENT *cl)
857 {
858 /* LINTED pointer alignment */
859 struct cu_data *cu = (struct cu_data *)cl->cl_private;
860 int cu_fd = cu->cu_fd;
861
862 (void) rpc_fd_lock(dgtbl, cu_fd);
863 if (cu->cu_closeit)
864 (void) t_close(cu_fd);
865 XDR_DESTROY(&(cu->cu_outxdrs));
866 cu->cu_tr_data->udata.buf = NULL;
867 (void) t_free((char *)cu->cu_tr_data, T_UNITDATA);
868 free(cu->cu_raddr.buf);
869 free(cu);
870 if (cl->cl_netid && cl->cl_netid[0])
871 free(cl->cl_netid);
872 if (cl->cl_tp && cl->cl_tp[0])
873 free(cl->cl_tp);
874 free(cl);
875 rpc_fd_unlock(dgtbl, cu_fd);
876 }
877
878 static struct clnt_ops *
879 clnt_dg_ops(void)
880 {
881 static struct clnt_ops ops;
882 extern mutex_t ops_lock;
883
884 /* VARIABLES PROTECTED BY ops_lock: ops */
885
886 sig_mutex_lock(&ops_lock);
887 if (ops.cl_call == NULL) {
888 ops.cl_call = clnt_dg_call;
889 ops.cl_send = clnt_dg_send;
890 ops.cl_abort = clnt_dg_abort;
891 ops.cl_geterr = clnt_dg_geterr;
892 ops.cl_freeres = clnt_dg_freeres;
893 ops.cl_destroy = clnt_dg_destroy;
894 ops.cl_control = clnt_dg_control;
895 }
896 sig_mutex_unlock(&ops_lock);
897 return (&ops);
898 }
899
900 /*
901 * Make sure that the time is not garbage. -1 value is allowed.
902 */
903 static bool_t
904 time_not_ok(struct timeval *t)
905 {
906 return (t->tv_sec < -1 || t->tv_sec > 100000000 ||
907 t->tv_usec < -1 || t->tv_usec > 1000000);
908 }
909
910 /*
911 * Receive a unit data error indication.
912 * Below even when t_alloc() fails we pass uderr=NULL to t_rcvuderr()
913 * so as to just clear the error indication.
914 */
915
916 static int
917 _rcv_unitdata_err(struct cu_data *cu)
918 {
919 int old;
920 struct t_uderr *uderr;
921
922 old = t_errno;
923 /* LINTED pointer cast */
924 uderr = (struct t_uderr *)t_alloc(cu->cu_fd, T_UDERROR, T_ADDR);
925
926 if (t_rcvuderr(cu->cu_fd, uderr) == 0) {
927 if (uderr == NULL)
928 return (0);
929
930 if (uderr->addr.len != cu->cu_raddr.len ||
931 (memcmp(uderr->addr.buf, cu->cu_raddr.buf,
932 cu->cu_raddr.len))) {
933 (void) t_free((char *)uderr, T_UDERROR);
934 return (0);
935 }
936 rpc_callerr.re_errno = uderr->error;
937 rpc_callerr.re_terrno = TSYSERR;
938 (void) t_free((char *)uderr, T_UDERROR);
939 return (1);
940 }
941 rpc_callerr.re_terrno = old;
942 if (uderr)
943 (void) t_free((char *)uderr, T_UDERROR);
944 return (-1);
945 }