1 /* $NetBSD: clnt_dg.c,v 1.4 2000/07/14 08:40:41 fvdl Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #ident "@(#)clnt_dg.c 1.23 94/04/22 SMI" 38 static char sccsid[] = "@(#)clnt_dg.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 39 #endif 40 /* 41 * Implements a connectionless client side RPC. 42 */ 43 44 #include "namespace.h" 45 #include "reentrant.h" 46 #include <sys/types.h> 47 #include <sys/event.h> 48 #include <sys/time.h> 49 #include <sys/socket.h> 50 #include <sys/ioctl.h> 51 #include <arpa/inet.h> 52 #include <rpc/rpc.h> 53 #include <rpc/rpcsec_gss.h> 54 #include <errno.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <signal.h> 58 #include <unistd.h> 59 #include <err.h> 60 #include "un-namespace.h" 61 #include "rpc_com.h" 62 #include "mt_misc.h" 63 64 65 #ifdef _FREEFALL_CONFIG 66 /* 67 * Disable RPC exponential back-off for FreeBSD.org systems. 68 */ 69 #define RPC_MAX_BACKOFF 1 /* second */ 70 #else 71 #define RPC_MAX_BACKOFF 30 /* seconds */ 72 #endif 73 74 75 static struct clnt_ops *clnt_dg_ops(void); 76 static bool_t time_not_ok(struct timeval *); 77 static enum clnt_stat clnt_dg_call(CLIENT *, rpcproc_t, xdrproc_t, void *, 78 xdrproc_t, void *, struct timeval); 79 static void clnt_dg_geterr(CLIENT *, struct rpc_err *); 80 static bool_t clnt_dg_freeres(CLIENT *, xdrproc_t, void *); 81 static void clnt_dg_abort(CLIENT *); 82 static bool_t clnt_dg_control(CLIENT *, u_int, void *); 83 static void clnt_dg_destroy(CLIENT *); 84 85 86 87 88 /* 89 * This machinery implements per-fd locks for MT-safety. It is not 90 * sufficient to do per-CLIENT handle locks for MT-safety because a 91 * user may create more than one CLIENT handle with the same fd behind 92 * it. Therefore, we allocate an array of flags (dg_fd_locks), protected 93 * by the clnt_fd_lock mutex, and an array (dg_cv) of condition variables 94 * similarly protected. Dg_fd_lock[fd] == 1 => a call is active on some 95 * CLIENT handle created for that fd. 96 * The current implementation holds locks across the entire RPC and reply, 97 * including retransmissions. Yes, this is silly, and as soon as this 98 * code is proven to work, this should be the first thing fixed. One step 99 * at a time. 100 */ 101 static int *dg_fd_locks; 102 static cond_t *dg_cv; 103 #define release_fd_lock(fd, mask) { \ 104 mutex_lock(&clnt_fd_lock); \ 105 dg_fd_locks[fd] = 0; \ 106 mutex_unlock(&clnt_fd_lock); \ 107 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \ 108 cond_signal(&dg_cv[fd]); \ 109 } 110 111 static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 112 113 /* VARIABLES PROTECTED BY clnt_fd_lock: dg_fd_locks, dg_cv */ 114 115 #define MCALL_MSG_SIZE 24 116 117 /* 118 * Private data kept per client handle 119 */ 120 struct cu_data { 121 int cu_fd; /* connections fd */ 122 bool_t cu_closeit; /* opened by library */ 123 struct sockaddr_storage cu_raddr; /* remote address */ 124 int cu_rlen; 125 struct timeval cu_wait; /* retransmit interval */ 126 struct timeval cu_total; /* total time for the call */ 127 struct rpc_err cu_error; 128 XDR cu_outxdrs; 129 u_int cu_xdrpos; 130 u_int cu_sendsz; /* send size */ 131 char cu_outhdr[MCALL_MSG_SIZE]; 132 char *cu_outbuf; 133 u_int cu_recvsz; /* recv size */ 134 int cu_async; 135 int cu_connect; /* Use connect(). */ 136 int cu_connected; /* Have done connect(). */ 137 struct kevent cu_kin; 138 int cu_kq; 139 char cu_inbuf[1]; 140 }; 141 142 /* 143 * Connection less client creation returns with client handle parameters. 144 * Default options are set, which the user can change using clnt_control(). 145 * fd should be open and bound. 146 * NB: The rpch->cl_auth is initialized to null authentication. 147 * Caller may wish to set this something more useful. 148 * 149 * sendsz and recvsz are the maximum allowable packet sizes that can be 150 * sent and received. Normally they are the same, but they can be 151 * changed to improve the program efficiency and buffer allocation. 152 * If they are 0, use the transport default. 153 * 154 * If svcaddr is NULL, returns NULL. 155 * 156 * fd - open file descriptor 157 * svcaddr - servers address 158 * program - program number 159 * version - version number 160 * sendsz - buffer recv size 161 * recvsz - buffer send size 162 */ 163 CLIENT * 164 clnt_dg_create(int fd, const struct netbuf *svcaddr, rpcprog_t program, 165 rpcvers_t version, u_int sendsz, u_int recvsz) 166 { 167 CLIENT *cl = NULL; /* client handle */ 168 struct cu_data *cu = NULL; /* private data */ 169 struct timeval now; 170 struct rpc_msg call_msg; 171 sigset_t mask; 172 sigset_t newmask; 173 struct __rpc_sockinfo si; 174 int one = 1; 175 176 sigfillset(&newmask); 177 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 178 mutex_lock(&clnt_fd_lock); 179 if (dg_fd_locks == (int *) NULL) { 180 int cv_allocsz; 181 size_t fd_allocsz; 182 int dtbsize = __rpc_dtbsize(); 183 184 fd_allocsz = dtbsize * sizeof (int); 185 dg_fd_locks = (int *) mem_alloc(fd_allocsz); 186 if (dg_fd_locks == (int *) NULL) { 187 mutex_unlock(&clnt_fd_lock); 188 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 189 goto err1; 190 } else 191 memset(dg_fd_locks, '\0', fd_allocsz); 192 193 cv_allocsz = dtbsize * sizeof (cond_t); 194 dg_cv = (cond_t *) mem_alloc(cv_allocsz); 195 if (dg_cv == (cond_t *) NULL) { 196 mem_free(dg_fd_locks, fd_allocsz); 197 dg_fd_locks = (int *) NULL; 198 mutex_unlock(&clnt_fd_lock); 199 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 200 goto err1; 201 } else { 202 int i; 203 204 for (i = 0; i < dtbsize; i++) 205 cond_init(&dg_cv[i], 0, (void *) 0); 206 } 207 } 208 209 mutex_unlock(&clnt_fd_lock); 210 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 211 212 if (svcaddr == NULL) { 213 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 214 return (NULL); 215 } 216 217 if (!__rpc_fd2sockinfo(fd, &si)) { 218 rpc_createerr.cf_stat = RPC_TLIERROR; 219 rpc_createerr.cf_error.re_errno = 0; 220 return (NULL); 221 } 222 /* 223 * Find the receive and the send size 224 */ 225 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 226 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 227 if ((sendsz == 0) || (recvsz == 0)) { 228 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 229 rpc_createerr.cf_error.re_errno = 0; 230 return (NULL); 231 } 232 233 if ((cl = mem_alloc(sizeof (CLIENT))) == NULL) 234 goto err1; 235 /* 236 * Should be multiple of 4 for XDR. 237 */ 238 sendsz = ((sendsz + 3) / 4) * 4; 239 recvsz = ((recvsz + 3) / 4) * 4; 240 cu = mem_alloc(sizeof (*cu) + sendsz + recvsz); 241 if (cu == NULL) 242 goto err1; 243 (void) memcpy(&cu->cu_raddr, svcaddr->buf, (size_t)svcaddr->len); 244 cu->cu_rlen = svcaddr->len; 245 cu->cu_outbuf = &cu->cu_inbuf[recvsz]; 246 /* Other values can also be set through clnt_control() */ 247 cu->cu_wait.tv_sec = 15; /* heuristically chosen */ 248 cu->cu_wait.tv_usec = 0; 249 cu->cu_total.tv_sec = -1; 250 cu->cu_total.tv_usec = -1; 251 cu->cu_sendsz = sendsz; 252 cu->cu_recvsz = recvsz; 253 cu->cu_async = FALSE; 254 cu->cu_connect = FALSE; 255 cu->cu_connected = FALSE; 256 (void) gettimeofday(&now, NULL); 257 call_msg.rm_xid = __RPC_GETXID(&now); 258 call_msg.rm_call.cb_prog = program; 259 call_msg.rm_call.cb_vers = version; 260 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outhdr, MCALL_MSG_SIZE, 261 XDR_ENCODE); 262 if (! xdr_callhdr(&cu->cu_outxdrs, &call_msg)) { 263 rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 264 rpc_createerr.cf_error.re_errno = 0; 265 goto err2; 266 } 267 cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs)); 268 XDR_DESTROY(&cu->cu_outxdrs); 269 xdrmem_create(&cu->cu_outxdrs, cu->cu_outbuf, sendsz, XDR_ENCODE); 270 271 /* XXX fvdl - do we still want this? */ 272 #if 0 273 (void)bindresvport_sa(fd, (struct sockaddr *)svcaddr->buf); 274 #endif 275 _ioctl(fd, FIONBIO, (char *)(void *)&one); 276 277 /* 278 * By default, closeit is always FALSE. It is users responsibility 279 * to do a close on it, else the user may use clnt_control 280 * to let clnt_destroy do it for him/her. 281 */ 282 cu->cu_closeit = FALSE; 283 cu->cu_fd = fd; 284 cl->cl_ops = clnt_dg_ops(); 285 cl->cl_private = (caddr_t)(void *)cu; 286 cl->cl_auth = authnone_create(); 287 cl->cl_tp = NULL; 288 cl->cl_netid = NULL; 289 cu->cu_kq = -1; 290 EV_SET(&cu->cu_kin, cu->cu_fd, EVFILT_READ, EV_ADD, 0, 0, 0); 291 return (cl); 292 err1: 293 warnx(mem_err_clnt_dg); 294 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 295 rpc_createerr.cf_error.re_errno = errno; 296 err2: 297 if (cl) { 298 mem_free(cl, sizeof (CLIENT)); 299 if (cu) 300 mem_free(cu, sizeof (*cu) + sendsz + recvsz); 301 } 302 return (NULL); 303 } 304 305 /* 306 * cl - client handle 307 * proc - procedure number 308 * xargs - xdr routine for args 309 * argsp - pointer to args 310 * xresults - xdr routine for results 311 * resultsp - pointer to results 312 * utimeout - seconds to wait before giving up 313 */ 314 static enum clnt_stat 315 clnt_dg_call(CLIENT *cl, rpcproc_t proc, xdrproc_t xargs, void *argsp, 316 xdrproc_t xresults, void *resultsp, struct timeval utimeout) 317 { 318 struct cu_data *cu = (struct cu_data *)cl->cl_private; 319 XDR *xdrs; 320 size_t outlen = 0; 321 struct rpc_msg reply_msg; 322 XDR reply_xdrs; 323 bool_t ok; 324 int nrefreshes = 2; /* number of times to refresh cred */ 325 int nretries = 0; /* number of times we retransmitted */ 326 struct timeval timeout; 327 struct timeval retransmit_time; 328 struct timeval next_sendtime, starttime, time_waited, tv; 329 struct timespec ts; 330 struct kevent kv; 331 struct sockaddr *sa; 332 sigset_t mask; 333 sigset_t newmask; 334 socklen_t salen; 335 ssize_t recvlen = 0; 336 int kin_len, n, rpc_lock_value; 337 u_int32_t xid; 338 339 outlen = 0; 340 sigfillset(&newmask); 341 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 342 mutex_lock(&clnt_fd_lock); 343 while (dg_fd_locks[cu->cu_fd]) 344 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 345 if (__isthreaded) 346 rpc_lock_value = 1; 347 else 348 rpc_lock_value = 0; 349 dg_fd_locks[cu->cu_fd] = rpc_lock_value; 350 mutex_unlock(&clnt_fd_lock); 351 if (cu->cu_total.tv_usec == -1) { 352 timeout = utimeout; /* use supplied timeout */ 353 } else { 354 timeout = cu->cu_total; /* use default timeout */ 355 } 356 357 if (cu->cu_connect && !cu->cu_connected) { 358 if (_connect(cu->cu_fd, (struct sockaddr *)&cu->cu_raddr, 359 cu->cu_rlen) < 0) { 360 cu->cu_error.re_errno = errno; 361 cu->cu_error.re_status = RPC_CANTSEND; 362 goto out; 363 } 364 cu->cu_connected = 1; 365 } 366 if (cu->cu_connected) { 367 sa = NULL; 368 salen = 0; 369 } else { 370 sa = (struct sockaddr *)&cu->cu_raddr; 371 salen = cu->cu_rlen; 372 } 373 time_waited.tv_sec = 0; 374 time_waited.tv_usec = 0; 375 retransmit_time = next_sendtime = cu->cu_wait; 376 gettimeofday(&starttime, NULL); 377 378 /* Clean up in case the last call ended in a longjmp(3) call. */ 379 if (cu->cu_kq >= 0) 380 _close(cu->cu_kq); 381 if ((cu->cu_kq = kqueue()) < 0) { 382 cu->cu_error.re_errno = errno; 383 cu->cu_error.re_status = RPC_CANTSEND; 384 goto out; 385 } 386 kin_len = 1; 387 388 call_again: 389 if (cu->cu_async == TRUE && xargs == NULL) 390 goto get_reply; 391 /* 392 * the transaction is the first thing in the out buffer 393 * XXX Yes, and it's in network byte order, so we should to 394 * be careful when we increment it, shouldn't we. 395 */ 396 xid = ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr)); 397 xid++; 398 *(u_int32_t *)(void *)(cu->cu_outhdr) = htonl(xid); 399 call_again_same_xid: 400 xdrs = &(cu->cu_outxdrs); 401 xdrs->x_op = XDR_ENCODE; 402 XDR_SETPOS(xdrs, 0); 403 404 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 405 if ((! XDR_PUTBYTES(xdrs, cu->cu_outhdr, cu->cu_xdrpos)) || 406 (! XDR_PUTINT32(xdrs, &proc)) || 407 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 408 (! (*xargs)(xdrs, argsp))) { 409 cu->cu_error.re_status = RPC_CANTENCODEARGS; 410 goto out; 411 } 412 } else { 413 *(uint32_t *) &cu->cu_outhdr[cu->cu_xdrpos] = htonl(proc); 414 if (!__rpc_gss_wrap(cl->cl_auth, cu->cu_outhdr, 415 cu->cu_xdrpos + sizeof(uint32_t), 416 xdrs, xargs, argsp)) { 417 cu->cu_error.re_status = RPC_CANTENCODEARGS; 418 goto out; 419 } 420 } 421 outlen = (size_t)XDR_GETPOS(xdrs); 422 423 send_again: 424 if (_sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, sa, salen) != outlen) { 425 cu->cu_error.re_errno = errno; 426 cu->cu_error.re_status = RPC_CANTSEND; 427 goto out; 428 } 429 430 /* 431 * Hack to provide rpc-based message passing 432 */ 433 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 434 cu->cu_error.re_status = RPC_TIMEDOUT; 435 goto out; 436 } 437 438 get_reply: 439 440 /* 441 * sub-optimal code appears here because we have 442 * some clock time to spare while the packets are in flight. 443 * (We assume that this is actually only executed once.) 444 */ 445 reply_msg.acpted_rply.ar_verf = _null_auth; 446 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) { 447 reply_msg.acpted_rply.ar_results.where = resultsp; 448 reply_msg.acpted_rply.ar_results.proc = xresults; 449 } else { 450 reply_msg.acpted_rply.ar_results.where = NULL; 451 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; 452 } 453 454 for (;;) { 455 /* Decide how long to wait. */ 456 if (timercmp(&next_sendtime, &timeout, <)) 457 timersub(&next_sendtime, &time_waited, &tv); 458 else 459 timersub(&timeout, &time_waited, &tv); 460 if (tv.tv_sec < 0 || tv.tv_usec < 0) 461 tv.tv_sec = tv.tv_usec = 0; 462 TIMEVAL_TO_TIMESPEC(&tv, &ts); 463 464 n = _kevent(cu->cu_kq, &cu->cu_kin, kin_len, &kv, 1, &ts); 465 /* We don't need to register the event again. */ 466 kin_len = 0; 467 468 if (n == 1) { 469 if (kv.flags & EV_ERROR) { 470 cu->cu_error.re_errno = kv.data; 471 cu->cu_error.re_status = RPC_CANTRECV; 472 goto out; 473 } 474 /* We have some data now */ 475 do { 476 recvlen = _recvfrom(cu->cu_fd, cu->cu_inbuf, 477 cu->cu_recvsz, 0, NULL, NULL); 478 } while (recvlen < 0 && errno == EINTR); 479 if (recvlen < 0 && errno != EWOULDBLOCK) { 480 cu->cu_error.re_errno = errno; 481 cu->cu_error.re_status = RPC_CANTRECV; 482 goto out; 483 } 484 if (recvlen >= sizeof(u_int32_t) && 485 (cu->cu_async == TRUE || 486 *((u_int32_t *)(void *)(cu->cu_inbuf)) == 487 *((u_int32_t *)(void *)(cu->cu_outbuf)))) { 488 /* We now assume we have the proper reply. */ 489 break; 490 } 491 } 492 if (n == -1 && errno != EINTR) { 493 cu->cu_error.re_errno = errno; 494 cu->cu_error.re_status = RPC_CANTRECV; 495 goto out; 496 } 497 gettimeofday(&tv, NULL); 498 timersub(&tv, &starttime, &time_waited); 499 500 /* Check for timeout. */ 501 if (timercmp(&time_waited, &timeout, >)) { 502 cu->cu_error.re_status = RPC_TIMEDOUT; 503 goto out; 504 } 505 506 /* Retransmit if necessary. */ 507 if (timercmp(&time_waited, &next_sendtime, >)) { 508 /* update retransmit_time */ 509 if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) 510 timeradd(&retransmit_time, &retransmit_time, 511 &retransmit_time); 512 timeradd(&next_sendtime, &retransmit_time, 513 &next_sendtime); 514 nretries++; 515 516 /* 517 * When retransmitting a RPCSEC_GSS message, 518 * we must use a new sequence number (handled 519 * by __rpc_gss_wrap above). 520 */ 521 if (cl->cl_auth->ah_cred.oa_flavor != RPCSEC_GSS) 522 goto send_again; 523 else 524 goto call_again_same_xid; 525 } 526 } 527 528 /* 529 * now decode and validate the response 530 */ 531 532 xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); 533 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 534 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 535 if (ok) { 536 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 537 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 538 cu->cu_error.re_status = RPC_SUCCESS; 539 else 540 _seterr_reply(&reply_msg, &(cu->cu_error)); 541 542 if (cu->cu_error.re_status == RPC_SUCCESS) { 543 if (! AUTH_VALIDATE(cl->cl_auth, 544 &reply_msg.acpted_rply.ar_verf)) { 545 if (nretries && 546 cl->cl_auth->ah_cred.oa_flavor 547 == RPCSEC_GSS) 548 /* 549 * If we retransmitted, its 550 * possible that we will 551 * receive a reply for one of 552 * the earlier transmissions 553 * (which will use an older 554 * RPCSEC_GSS sequence 555 * number). In this case, just 556 * go back and listen for a 557 * new reply. We could keep a 558 * record of all the seq 559 * numbers we have transmitted 560 * so far so that we could 561 * accept a reply for any of 562 * them here. 563 */ 564 goto get_reply; 565 cu->cu_error.re_status = RPC_AUTHERROR; 566 cu->cu_error.re_why = AUTH_INVALIDRESP; 567 } else { 568 if (cl->cl_auth->ah_cred.oa_flavor 569 == RPCSEC_GSS) { 570 if (!__rpc_gss_unwrap(cl->cl_auth, 571 &reply_xdrs, xresults, 572 resultsp)) 573 cu->cu_error.re_status = 574 RPC_CANTDECODERES; 575 } 576 } 577 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 578 xdrs->x_op = XDR_FREE; 579 (void) xdr_opaque_auth(xdrs, 580 &(reply_msg.acpted_rply.ar_verf)); 581 } 582 } /* end successful completion */ 583 /* 584 * If unsuccessful AND error is an authentication error 585 * then refresh credentials and try again, else break 586 */ 587 else if (cu->cu_error.re_status == RPC_AUTHERROR) 588 /* maybe our credentials need to be refreshed ... */ 589 if (nrefreshes > 0 && 590 AUTH_REFRESH(cl->cl_auth, &reply_msg)) { 591 nrefreshes--; 592 goto call_again; 593 } 594 /* end of unsuccessful completion */ 595 } /* end of valid reply message */ 596 else { 597 cu->cu_error.re_status = RPC_CANTDECODERES; 598 599 } 600 out: 601 if (cu->cu_kq >= 0) 602 _close(cu->cu_kq); 603 cu->cu_kq = -1; 604 release_fd_lock(cu->cu_fd, mask); 605 return (cu->cu_error.re_status); 606 } 607 608 static void 609 clnt_dg_geterr(CLIENT *cl, struct rpc_err *errp) 610 { 611 struct cu_data *cu = (struct cu_data *)cl->cl_private; 612 613 *errp = cu->cu_error; 614 } 615 616 static bool_t 617 clnt_dg_freeres(CLIENT *cl, xdrproc_t xdr_res, void *res_ptr) 618 { 619 struct cu_data *cu = (struct cu_data *)cl->cl_private; 620 XDR *xdrs = &(cu->cu_outxdrs); 621 bool_t dummy; 622 sigset_t mask; 623 sigset_t newmask; 624 625 sigfillset(&newmask); 626 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 627 mutex_lock(&clnt_fd_lock); 628 while (dg_fd_locks[cu->cu_fd]) 629 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 630 xdrs->x_op = XDR_FREE; 631 dummy = (*xdr_res)(xdrs, res_ptr); 632 mutex_unlock(&clnt_fd_lock); 633 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 634 cond_signal(&dg_cv[cu->cu_fd]); 635 return (dummy); 636 } 637 638 /*ARGSUSED*/ 639 static void 640 clnt_dg_abort(CLIENT *h) 641 { 642 } 643 644 static bool_t 645 clnt_dg_control(CLIENT *cl, u_int request, void *info) 646 { 647 struct cu_data *cu = (struct cu_data *)cl->cl_private; 648 struct netbuf *addr; 649 sigset_t mask; 650 sigset_t newmask; 651 int rpc_lock_value; 652 653 sigfillset(&newmask); 654 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 655 mutex_lock(&clnt_fd_lock); 656 while (dg_fd_locks[cu->cu_fd]) 657 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 658 if (__isthreaded) 659 rpc_lock_value = 1; 660 else 661 rpc_lock_value = 0; 662 dg_fd_locks[cu->cu_fd] = rpc_lock_value; 663 mutex_unlock(&clnt_fd_lock); 664 switch (request) { 665 case CLSET_FD_CLOSE: 666 cu->cu_closeit = TRUE; 667 release_fd_lock(cu->cu_fd, mask); 668 return (TRUE); 669 case CLSET_FD_NCLOSE: 670 cu->cu_closeit = FALSE; 671 release_fd_lock(cu->cu_fd, mask); 672 return (TRUE); 673 } 674 675 /* for other requests which use info */ 676 if (info == NULL) { 677 release_fd_lock(cu->cu_fd, mask); 678 return (FALSE); 679 } 680 switch (request) { 681 case CLSET_TIMEOUT: 682 if (time_not_ok((struct timeval *)info)) { 683 release_fd_lock(cu->cu_fd, mask); 684 return (FALSE); 685 } 686 cu->cu_total = *(struct timeval *)info; 687 break; 688 case CLGET_TIMEOUT: 689 *(struct timeval *)info = cu->cu_total; 690 break; 691 case CLGET_SERVER_ADDR: /* Give him the fd address */ 692 /* Now obsolete. Only for backward compatibility */ 693 (void) memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); 694 break; 695 case CLSET_RETRY_TIMEOUT: 696 if (time_not_ok((struct timeval *)info)) { 697 release_fd_lock(cu->cu_fd, mask); 698 return (FALSE); 699 } 700 cu->cu_wait = *(struct timeval *)info; 701 break; 702 case CLGET_RETRY_TIMEOUT: 703 *(struct timeval *)info = cu->cu_wait; 704 break; 705 case CLGET_FD: 706 *(int *)info = cu->cu_fd; 707 break; 708 case CLGET_SVC_ADDR: 709 addr = (struct netbuf *)info; 710 addr->buf = &cu->cu_raddr; 711 addr->len = cu->cu_rlen; 712 addr->maxlen = sizeof cu->cu_raddr; 713 break; 714 case CLSET_SVC_ADDR: /* set to new address */ 715 addr = (struct netbuf *)info; 716 if (addr->len < sizeof cu->cu_raddr) { 717 release_fd_lock(cu->cu_fd, mask); 718 return (FALSE); 719 } 720 (void) memcpy(&cu->cu_raddr, addr->buf, addr->len); 721 cu->cu_rlen = addr->len; 722 break; 723 case CLGET_XID: 724 /* 725 * use the knowledge that xid is the 726 * first element in the call structure *. 727 * This will get the xid of the PREVIOUS call 728 */ 729 *(u_int32_t *)info = 730 ntohl(*(u_int32_t *)(void *)cu->cu_outhdr); 731 break; 732 733 case CLSET_XID: 734 /* This will set the xid of the NEXT call */ 735 *(u_int32_t *)(void *)cu->cu_outhdr = 736 htonl(*(u_int32_t *)info - 1); 737 /* decrement by 1 as clnt_dg_call() increments once */ 738 break; 739 740 case CLGET_VERS: 741 /* 742 * This RELIES on the information that, in the call body, 743 * the version number field is the fifth field from the 744 * beginning of the RPC header. MUST be changed if the 745 * call_struct is changed 746 */ 747 *(u_int32_t *)info = 748 ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr + 749 4 * BYTES_PER_XDR_UNIT)); 750 break; 751 752 case CLSET_VERS: 753 *(u_int32_t *)(void *)(cu->cu_outhdr + 4 * BYTES_PER_XDR_UNIT) 754 = htonl(*(u_int32_t *)info); 755 break; 756 757 case CLGET_PROG: 758 /* 759 * This RELIES on the information that, in the call body, 760 * the program number field is the fourth field from the 761 * beginning of the RPC header. MUST be changed if the 762 * call_struct is changed 763 */ 764 *(u_int32_t *)info = 765 ntohl(*(u_int32_t *)(void *)(cu->cu_outhdr + 766 3 * BYTES_PER_XDR_UNIT)); 767 break; 768 769 case CLSET_PROG: 770 *(u_int32_t *)(void *)(cu->cu_outhdr + 3 * BYTES_PER_XDR_UNIT) 771 = htonl(*(u_int32_t *)info); 772 break; 773 case CLSET_ASYNC: 774 cu->cu_async = *(int *)info; 775 break; 776 case CLSET_CONNECT: 777 cu->cu_connect = *(int *)info; 778 break; 779 default: 780 release_fd_lock(cu->cu_fd, mask); 781 return (FALSE); 782 } 783 release_fd_lock(cu->cu_fd, mask); 784 return (TRUE); 785 } 786 787 static void 788 clnt_dg_destroy(CLIENT *cl) 789 { 790 struct cu_data *cu = (struct cu_data *)cl->cl_private; 791 int cu_fd = cu->cu_fd; 792 sigset_t mask; 793 sigset_t newmask; 794 795 sigfillset(&newmask); 796 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 797 mutex_lock(&clnt_fd_lock); 798 while (dg_fd_locks[cu_fd]) 799 cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); 800 if (cu->cu_closeit) 801 (void)_close(cu_fd); 802 if (cu->cu_kq >= 0) 803 _close(cu->cu_kq); 804 XDR_DESTROY(&(cu->cu_outxdrs)); 805 mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 806 if (cl->cl_netid && cl->cl_netid[0]) 807 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 808 if (cl->cl_tp && cl->cl_tp[0]) 809 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 810 mem_free(cl, sizeof (CLIENT)); 811 mutex_unlock(&clnt_fd_lock); 812 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 813 cond_signal(&dg_cv[cu_fd]); 814 } 815 816 static struct clnt_ops * 817 clnt_dg_ops(void) 818 { 819 static struct clnt_ops ops; 820 sigset_t mask; 821 sigset_t newmask; 822 823 /* VARIABLES PROTECTED BY ops_lock: ops */ 824 825 sigfillset(&newmask); 826 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 827 mutex_lock(&ops_lock); 828 if (ops.cl_call == NULL) { 829 ops.cl_call = clnt_dg_call; 830 ops.cl_abort = clnt_dg_abort; 831 ops.cl_geterr = clnt_dg_geterr; 832 ops.cl_freeres = clnt_dg_freeres; 833 ops.cl_destroy = clnt_dg_destroy; 834 ops.cl_control = clnt_dg_control; 835 } 836 mutex_unlock(&ops_lock); 837 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 838 return (&ops); 839 } 840 841 /* 842 * Make sure that the time is not garbage. -1 value is allowed. 843 */ 844 static bool_t 845 time_not_ok(struct timeval *t) 846 { 847 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 848 t->tv_usec < -1 || t->tv_usec > 1000000); 849 } 850 851