1 /* $NetBSD: clnt_dg.c,v 1.22 2008/04/25 17:44:44 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 /* 32 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 33 */ 34 35 /* #ident "@(#)clnt_dg.c 1.23 94/04/22 SMI" */ 36 37 #include <sys/cdefs.h> 38 #if defined(LIBC_SCCS) && !defined(lint) 39 #if 0 40 static char sccsid[] = "@(#)clnt_dg.c 1.19 89/03/16 Copyr 1988 Sun Micro"; 41 #else 42 __RCSID("$NetBSD: clnt_dg.c,v 1.22 2008/04/25 17:44:44 christos Exp $"); 43 #endif 44 #endif 45 46 /* 47 * Implements a connectionless client side RPC. 48 */ 49 50 #include "namespace.h" 51 #include "reentrant.h" 52 #include <sys/poll.h> 53 #include <sys/types.h> 54 #include <sys/time.h> 55 #include <sys/socket.h> 56 #include <sys/ioctl.h> 57 #include <rpc/rpc.h> 58 #include <assert.h> 59 #include <errno.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <signal.h> 63 #include <unistd.h> 64 #include <err.h> 65 #include "rpc_internal.h" 66 67 #ifdef __weak_alias 68 __weak_alias(clnt_dg_create,_clnt_dg_create) 69 #endif 70 71 #define RPC_MAX_BACKOFF 30 /* seconds */ 72 73 74 static struct clnt_ops *clnt_dg_ops __P((void)); 75 static bool_t time_not_ok __P((struct timeval *)); 76 static enum clnt_stat clnt_dg_call __P((CLIENT *, rpcproc_t, xdrproc_t, 77 const char *, xdrproc_t, caddr_t, struct timeval)); 78 static void clnt_dg_geterr __P((CLIENT *, struct rpc_err *)); 79 static bool_t clnt_dg_freeres __P((CLIENT *, xdrproc_t, caddr_t)); 80 static void clnt_dg_abort __P((CLIENT *)); 81 static bool_t clnt_dg_control __P((CLIENT *, u_int, char *)); 82 static void clnt_dg_destroy __P((CLIENT *)); 83 84 85 86 87 /* 88 * This machinery implements per-fd locks for MT-safety. It is not 89 * sufficient to do per-CLIENT handle locks for MT-safety because a 90 * user may create more than one CLIENT handle with the same fd behind 91 * it. Therfore, we allocate an array of flags (dg_fd_locks), protected 92 * by the clnt_fd_lock mutex, and an array (dg_cv) of condition variables 93 * similarly protected. Dg_fd_lock[fd] == 1 => a call is activte on some 94 * CLIENT handle created for that fd. 95 * The current implementation holds locks across the entire RPC and reply, 96 * including retransmissions. Yes, this is silly, and as soon as this 97 * code is proven to work, this should be the first thing fixed. One step 98 * at a time. 99 */ 100 static int *dg_fd_locks; 101 #ifdef _REENTRANT 102 extern int __isthreaded; 103 #define __rpc_lock_value __isthreaded; 104 extern mutex_t clnt_fd_lock; 105 static cond_t *dg_cv; 106 #define release_fd_lock(fd, mask) { \ 107 mutex_lock(&clnt_fd_lock); \ 108 dg_fd_locks[fd] = 0; \ 109 mutex_unlock(&clnt_fd_lock); \ 110 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); \ 111 cond_signal(&dg_cv[fd]); \ 112 } 113 #else 114 #define release_fd_lock(fd,mask) 115 #define __rpc_lock_value 0 116 #endif 117 118 static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 119 120 /* VARIABLES PROTECTED BY clnt_fd_lock: dg_fd_locks, dg_cv */ 121 122 /* 123 * Private data kept per client handle 124 */ 125 struct cu_data { 126 int cu_fd; /* connections fd */ 127 bool_t cu_closeit; /* opened by library */ 128 struct sockaddr_storage cu_raddr; /* remote address */ 129 int cu_rlen; 130 struct timeval cu_wait; /* retransmit interval */ 131 struct timeval cu_total; /* total time for the call */ 132 struct rpc_err cu_error; 133 XDR cu_outxdrs; 134 u_int cu_xdrpos; 135 u_int cu_sendsz; /* send size */ 136 char *cu_outbuf; 137 u_int cu_recvsz; /* recv size */ 138 struct pollfd cu_pfdp; 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 CLIENT * 157 clnt_dg_create(fd, svcaddr, program, version, sendsz, recvsz) 158 int fd; /* open file descriptor */ 159 const struct netbuf *svcaddr; /* servers address */ 160 rpcprog_t program; /* program number */ 161 rpcvers_t version; /* version number */ 162 u_int sendsz; /* buffer recv size */ 163 u_int recvsz; /* buffer send size */ 164 { 165 CLIENT *cl = NULL; /* client handle */ 166 struct cu_data *cu = NULL; /* private data */ 167 struct rpc_msg call_msg; 168 #ifdef _REENTRANT 169 sigset_t mask; 170 #endif 171 sigset_t newmask; 172 struct __rpc_sockinfo si; 173 int one = 1; 174 175 sigfillset(&newmask); 176 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 177 mutex_lock(&clnt_fd_lock); 178 if (dg_fd_locks == NULL) { 179 #ifdef _REENTRANT 180 size_t cv_allocsz; 181 #endif 182 size_t fd_allocsz; 183 int dtbsize = __rpc_dtbsize(); 184 185 fd_allocsz = dtbsize * sizeof (int); 186 dg_fd_locks = mem_alloc(fd_allocsz); 187 if (dg_fd_locks == NULL) { 188 mutex_unlock(&clnt_fd_lock); 189 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 190 goto err1; 191 } else 192 memset(dg_fd_locks, '\0', fd_allocsz); 193 194 #ifdef _REENTRANT 195 cv_allocsz = dtbsize * sizeof (cond_t); 196 dg_cv = mem_alloc(cv_allocsz); 197 if (dg_cv == NULL) { 198 mem_free(dg_fd_locks, fd_allocsz); 199 dg_fd_locks = NULL; 200 mutex_unlock(&clnt_fd_lock); 201 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 202 goto err1; 203 } else { 204 int i; 205 206 for (i = 0; i < dtbsize; i++) 207 cond_init(&dg_cv[i], 0, (void *) 0); 208 } 209 #endif 210 } 211 212 mutex_unlock(&clnt_fd_lock); 213 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 214 215 if (svcaddr == NULL) { 216 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 217 return (NULL); 218 } 219 220 if (!__rpc_fd2sockinfo(fd, &si)) { 221 rpc_createerr.cf_stat = RPC_TLIERROR; 222 rpc_createerr.cf_error.re_errno = 0; 223 return (NULL); 224 } 225 /* 226 * Find the receive and the send size 227 */ 228 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 229 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 230 if ((sendsz == 0) || (recvsz == 0)) { 231 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 232 rpc_createerr.cf_error.re_errno = 0; 233 return (NULL); 234 } 235 236 if ((cl = mem_alloc(sizeof (CLIENT))) == NULL) 237 goto err1; 238 /* 239 * Should be multiple of 4 for XDR. 240 */ 241 sendsz = ((sendsz + 3) / 4) * 4; 242 recvsz = ((recvsz + 3) / 4) * 4; 243 cu = malloc(sizeof (*cu) + sendsz + recvsz); 244 if (cu == NULL) 245 goto err1; 246 memset(cu, 0, sizeof(*cu)); 247 (void) memcpy(&cu->cu_raddr, svcaddr->buf, (size_t)svcaddr->len); 248 cu->cu_rlen = svcaddr->len; 249 cu->cu_outbuf = &cu->cu_inbuf[recvsz]; 250 /* Other values can also be set through clnt_control() */ 251 cu->cu_wait.tv_sec = 15; /* heuristically chosen */ 252 cu->cu_wait.tv_usec = 0; 253 cu->cu_total.tv_sec = -1; 254 cu->cu_total.tv_usec = -1; 255 cu->cu_sendsz = sendsz; 256 cu->cu_recvsz = recvsz; 257 call_msg.rm_xid = __RPC_GETXID(); 258 call_msg.rm_call.cb_prog = program; 259 call_msg.rm_call.cb_vers = version; 260 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, XDR_ENCODE); 261 if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) { 262 rpc_createerr.cf_stat = RPC_CANTENCODEARGS; /* XXX */ 263 rpc_createerr.cf_error.re_errno = 0; 264 goto err2; 265 } 266 cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs)); 267 268 /* XXX fvdl - do we still want this? */ 269 #if 0 270 (void)bindresvport_sa(fd, (struct sockaddr *)svcaddr->buf); 271 #endif 272 ioctl(fd, FIONBIO, (char *)(void *)&one); 273 274 /* 275 * By default, closeit is always FALSE. It is users responsibility 276 * to do a close on it, else the user may use clnt_control 277 * to let clnt_destroy do it for him/her. 278 */ 279 cu->cu_closeit = FALSE; 280 cu->cu_fd = fd; 281 cu->cu_pfdp.fd = cu->cu_fd; 282 cu->cu_pfdp.events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND; 283 cl->cl_ops = clnt_dg_ops(); 284 cl->cl_private = (caddr_t)(void *)cu; 285 cl->cl_auth = authnone_create(); 286 cl->cl_tp = NULL; 287 cl->cl_netid = NULL; 288 return (cl); 289 err1: 290 warnx(mem_err_clnt_dg); 291 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 292 rpc_createerr.cf_error.re_errno = errno; 293 err2: 294 if (cl) { 295 mem_free(cl, sizeof (CLIENT)); 296 if (cu) 297 mem_free(cu, sizeof (*cu) + sendsz + recvsz); 298 } 299 return (NULL); 300 } 301 302 static enum clnt_stat 303 clnt_dg_call(cl, proc, xargs, argsp, xresults, resultsp, utimeout) 304 CLIENT *cl; /* client handle */ 305 rpcproc_t proc; /* procedure number */ 306 xdrproc_t xargs; /* xdr routine for args */ 307 const char * argsp; /* pointer to args */ 308 xdrproc_t xresults; /* xdr routine for results */ 309 caddr_t resultsp; /* pointer to results */ 310 struct timeval utimeout; /* seconds to wait before giving up */ 311 { 312 struct cu_data *cu; 313 XDR *xdrs; 314 size_t outlen; 315 struct rpc_msg reply_msg; 316 XDR reply_xdrs; 317 bool_t ok; 318 int nrefreshes = 2; /* number of times to refresh cred */ 319 struct timeval timeout; 320 struct timeval retransmit_time; 321 struct timeval next_sendtime, starttime, time_waited, tv; 322 #ifdef _REENTRANT 323 sigset_t mask, *maskp = &mask; 324 #else 325 sigset_t *maskp = NULL; 326 #endif 327 sigset_t newmask; 328 ssize_t recvlen = 0; 329 struct timespec ts; 330 int n; 331 332 _DIAGASSERT(cl != NULL); 333 334 cu = (struct cu_data *)cl->cl_private; 335 336 sigfillset(&newmask); 337 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 338 mutex_lock(&clnt_fd_lock); 339 while (dg_fd_locks[cu->cu_fd]) 340 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 341 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 342 mutex_unlock(&clnt_fd_lock); 343 if (cu->cu_total.tv_usec == -1) { 344 timeout = utimeout; /* use supplied timeout */ 345 } else { 346 timeout = cu->cu_total; /* use default timeout */ 347 } 348 349 time_waited.tv_sec = 0; 350 time_waited.tv_usec = 0; 351 retransmit_time = next_sendtime = cu->cu_wait; 352 gettimeofday(&starttime, NULL); 353 354 call_again: 355 xdrs = &(cu->cu_outxdrs); 356 xdrs->x_op = XDR_ENCODE; 357 XDR_SETPOS(xdrs, cu->cu_xdrpos); 358 /* 359 * the transaction is the first thing in the out buffer 360 */ 361 (*(u_int32_t *)(void *)(cu->cu_outbuf))++; 362 if ((! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 363 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 364 (! (*xargs)(xdrs, __UNCONST(argsp)))) { 365 cu->cu_error.re_status = RPC_CANTENCODEARGS; 366 goto out; 367 } 368 outlen = (size_t)XDR_GETPOS(xdrs); 369 370 send_again: 371 if (sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, 372 (struct sockaddr *)(void *)&cu->cu_raddr, (socklen_t)cu->cu_rlen) 373 != outlen) { 374 cu->cu_error.re_errno = errno; 375 cu->cu_error.re_status = RPC_CANTSEND; 376 goto out; 377 } 378 379 /* 380 * Hack to provide rpc-based message passing 381 */ 382 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 383 cu->cu_error.re_status = RPC_TIMEDOUT; 384 goto out; 385 } 386 /* 387 * sub-optimal code appears here because we have 388 * some clock time to spare while the packets are in flight. 389 * (We assume that this is actually only executed once.) 390 */ 391 reply_msg.acpted_rply.ar_verf = _null_auth; 392 reply_msg.acpted_rply.ar_results.where = resultsp; 393 reply_msg.acpted_rply.ar_results.proc = xresults; 394 395 396 for (;;) { 397 /* Decide how long to wait. */ 398 if (timercmp(&next_sendtime, &timeout, <)) 399 timersub(&next_sendtime, &time_waited, &tv); 400 else 401 timersub(&timeout, &time_waited, &tv); 402 if (tv.tv_sec < 0 || tv.tv_usec < 0) 403 tv.tv_sec = tv.tv_usec = 0; 404 TIMEVAL_TO_TIMESPEC(&tv, &ts); 405 406 n = pollts(&cu->cu_pfdp, 1, &ts, maskp); 407 if (n == 1) { 408 /* We have some data now */ 409 do { 410 recvlen = recvfrom(cu->cu_fd, cu->cu_inbuf, 411 cu->cu_recvsz, 0, NULL, NULL); 412 } while (recvlen < 0 && errno == EINTR); 413 414 if (recvlen < 0 && errno != EWOULDBLOCK) { 415 cu->cu_error.re_errno = errno; 416 cu->cu_error.re_status = RPC_CANTRECV; 417 goto out; 418 } 419 if (recvlen >= sizeof(uint32_t) && 420 (*((uint32_t *)(void *)(cu->cu_inbuf)) == 421 *((uint32_t *)(void *)(cu->cu_outbuf)))) { 422 /* We now assume we have the proper reply. */ 423 break; 424 } 425 } 426 if (n == -1) { 427 cu->cu_error.re_errno = errno; 428 cu->cu_error.re_status = RPC_CANTRECV; 429 goto out; 430 } 431 432 gettimeofday(&tv, NULL); 433 timersub(&tv, &starttime, &time_waited); 434 435 /* Check for timeout. */ 436 if (timercmp(&time_waited, &timeout, >)) { 437 cu->cu_error.re_status = RPC_TIMEDOUT; 438 goto out; 439 } 440 441 /* Retransmit if necessary. */ 442 if (timercmp(&time_waited, &next_sendtime, >)) { 443 /* update retransmit_time */ 444 if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) 445 timeradd(&retransmit_time, &retransmit_time, 446 &retransmit_time); 447 timeradd(&next_sendtime, &retransmit_time, 448 &next_sendtime); 449 goto send_again; 450 } 451 } 452 453 /* 454 * now decode and validate the response 455 */ 456 457 xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); 458 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 459 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 460 if (ok) { 461 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 462 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 463 cu->cu_error.re_status = RPC_SUCCESS; 464 else 465 _seterr_reply(&reply_msg, &(cu->cu_error)); 466 467 if (cu->cu_error.re_status == RPC_SUCCESS) { 468 if (! AUTH_VALIDATE(cl->cl_auth, 469 &reply_msg.acpted_rply.ar_verf)) { 470 cu->cu_error.re_status = RPC_AUTHERROR; 471 cu->cu_error.re_why = AUTH_INVALIDRESP; 472 } 473 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 474 xdrs->x_op = XDR_FREE; 475 (void) xdr_opaque_auth(xdrs, 476 &(reply_msg.acpted_rply.ar_verf)); 477 } 478 } /* end successful completion */ 479 /* 480 * If unsuccesful AND error is an authentication error 481 * then refresh credentials and try again, else break 482 */ 483 else if (cu->cu_error.re_status == RPC_AUTHERROR) 484 /* maybe our credentials need to be refreshed ... */ 485 if (nrefreshes > 0 && AUTH_REFRESH(cl->cl_auth)) { 486 nrefreshes--; 487 goto call_again; 488 } 489 /* end of unsuccessful completion */ 490 } /* end of valid reply message */ 491 else { 492 cu->cu_error.re_status = RPC_CANTDECODERES; 493 494 } 495 out: 496 release_fd_lock(cu->cu_fd, mask); 497 return (cu->cu_error.re_status); 498 } 499 500 static void 501 clnt_dg_geterr(cl, errp) 502 CLIENT *cl; 503 struct rpc_err *errp; 504 { 505 struct cu_data *cu; 506 507 _DIAGASSERT(cl != NULL); 508 _DIAGASSERT(errp != NULL); 509 510 cu = (struct cu_data *)cl->cl_private; 511 *errp = cu->cu_error; 512 } 513 514 static bool_t 515 clnt_dg_freeres(cl, xdr_res, res_ptr) 516 CLIENT *cl; 517 xdrproc_t xdr_res; 518 caddr_t res_ptr; 519 { 520 struct cu_data *cu; 521 XDR *xdrs; 522 bool_t dummy; 523 #ifdef _REENTRANT 524 sigset_t mask; 525 #endif 526 sigset_t newmask; 527 528 _DIAGASSERT(cl != NULL); 529 cu = (struct cu_data *)cl->cl_private; 530 xdrs = &(cu->cu_outxdrs); 531 532 sigfillset(&newmask); 533 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 534 mutex_lock(&clnt_fd_lock); 535 while (dg_fd_locks[cu->cu_fd]) 536 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 537 xdrs->x_op = XDR_FREE; 538 dummy = (*xdr_res)(xdrs, res_ptr); 539 mutex_unlock(&clnt_fd_lock); 540 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 541 cond_signal(&dg_cv[cu->cu_fd]); 542 return (dummy); 543 } 544 545 /*ARGSUSED*/ 546 static void 547 clnt_dg_abort(h) 548 CLIENT *h; 549 { 550 } 551 552 static bool_t 553 clnt_dg_control(cl, request, info) 554 CLIENT *cl; 555 u_int request; 556 char *info; 557 { 558 struct cu_data *cu; 559 struct netbuf *addr; 560 #ifdef _REENTRANT 561 sigset_t mask; 562 #endif 563 sigset_t newmask; 564 565 _DIAGASSERT(cl != NULL); 566 /* info is handled below */ 567 568 cu = (struct cu_data *)cl->cl_private; 569 570 sigfillset(&newmask); 571 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 572 mutex_lock(&clnt_fd_lock); 573 while (dg_fd_locks[cu->cu_fd]) 574 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 575 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 576 mutex_unlock(&clnt_fd_lock); 577 switch (request) { 578 case CLSET_FD_CLOSE: 579 cu->cu_closeit = TRUE; 580 release_fd_lock(cu->cu_fd, mask); 581 return (TRUE); 582 case CLSET_FD_NCLOSE: 583 cu->cu_closeit = FALSE; 584 release_fd_lock(cu->cu_fd, mask); 585 return (TRUE); 586 } 587 588 /* for other requests which use info */ 589 if (info == NULL) { 590 release_fd_lock(cu->cu_fd, mask); 591 return (FALSE); 592 } 593 switch (request) { 594 case CLSET_TIMEOUT: 595 if (time_not_ok((struct timeval *)(void *)info)) { 596 release_fd_lock(cu->cu_fd, mask); 597 return (FALSE); 598 } 599 cu->cu_total = *(struct timeval *)(void *)info; 600 break; 601 case CLGET_TIMEOUT: 602 *(struct timeval *)(void *)info = cu->cu_total; 603 break; 604 case CLGET_SERVER_ADDR: /* Give him the fd address */ 605 /* Now obsolete. Only for backward compatibility */ 606 (void) memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); 607 break; 608 case CLSET_RETRY_TIMEOUT: 609 if (time_not_ok((struct timeval *)(void *)info)) { 610 release_fd_lock(cu->cu_fd, mask); 611 return (FALSE); 612 } 613 cu->cu_wait = *(struct timeval *)(void *)info; 614 break; 615 case CLGET_RETRY_TIMEOUT: 616 *(struct timeval *)(void *)info = cu->cu_wait; 617 break; 618 case CLGET_FD: 619 *(int *)(void *)info = cu->cu_fd; 620 break; 621 case CLGET_SVC_ADDR: 622 addr = (struct netbuf *)(void *)info; 623 addr->buf = &cu->cu_raddr; 624 addr->len = cu->cu_rlen; 625 addr->maxlen = sizeof cu->cu_raddr; 626 break; 627 case CLSET_SVC_ADDR: /* set to new address */ 628 addr = (struct netbuf *)(void *)info; 629 if (addr->len < sizeof cu->cu_raddr) { 630 release_fd_lock(cu->cu_fd, mask); 631 return (FALSE); 632 } 633 (void) memcpy(&cu->cu_raddr, addr->buf, (size_t)addr->len); 634 cu->cu_rlen = addr->len; 635 break; 636 case CLGET_XID: 637 /* 638 * use the knowledge that xid is the 639 * first element in the call structure *. 640 * This will get the xid of the PREVIOUS call 641 */ 642 *(u_int32_t *)(void *)info = 643 ntohl(*(u_int32_t *)(void *)cu->cu_outbuf); 644 break; 645 646 case CLSET_XID: 647 /* This will set the xid of the NEXT call */ 648 *(u_int32_t *)(void *)cu->cu_outbuf = 649 htonl(*(u_int32_t *)(void *)info - 1); 650 /* decrement by 1 as clnt_dg_call() increments once */ 651 break; 652 653 case CLGET_VERS: 654 /* 655 * This RELIES on the information that, in the call body, 656 * the version number field is the fifth field from the 657 * begining of the RPC header. MUST be changed if the 658 * call_struct is changed 659 */ 660 *(u_int32_t *)(void *)info = 661 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 662 4 * BYTES_PER_XDR_UNIT)); 663 break; 664 665 case CLSET_VERS: 666 *(u_int32_t *)(void *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT) 667 = htonl(*(u_int32_t *)(void *)info); 668 break; 669 670 case CLGET_PROG: 671 /* 672 * This RELIES on the information that, in the call body, 673 * the program number field is the fourth field from the 674 * begining of the RPC header. MUST be changed if the 675 * call_struct is changed 676 */ 677 *(u_int32_t *)(void *)info = 678 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 679 3 * BYTES_PER_XDR_UNIT)); 680 break; 681 682 case CLSET_PROG: 683 *(u_int32_t *)(void *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) 684 = htonl(*(u_int32_t *)(void *)info); 685 break; 686 687 default: 688 release_fd_lock(cu->cu_fd, mask); 689 return (FALSE); 690 } 691 release_fd_lock(cu->cu_fd, mask); 692 return (TRUE); 693 } 694 695 static void 696 clnt_dg_destroy(cl) 697 CLIENT *cl; 698 { 699 struct cu_data *cu; 700 int cu_fd; 701 #ifdef _REENTRANT 702 sigset_t mask; 703 #endif 704 sigset_t newmask; 705 706 _DIAGASSERT(cl != NULL); 707 708 cu = (struct cu_data *)cl->cl_private; 709 cu_fd = cu->cu_fd; 710 711 sigfillset(&newmask); 712 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 713 mutex_lock(&clnt_fd_lock); 714 while (dg_fd_locks[cu_fd]) 715 cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); 716 if (cu->cu_closeit) 717 (void) close(cu_fd); 718 XDR_DESTROY(&(cu->cu_outxdrs)); 719 mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 720 if (cl->cl_netid && cl->cl_netid[0]) 721 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 722 if (cl->cl_tp && cl->cl_tp[0]) 723 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 724 mem_free(cl, sizeof (CLIENT)); 725 mutex_unlock(&clnt_fd_lock); 726 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 727 cond_signal(&dg_cv[cu_fd]); 728 } 729 730 static struct clnt_ops * 731 clnt_dg_ops() 732 { 733 static struct clnt_ops ops; 734 #ifdef _REENTRANT 735 extern mutex_t ops_lock; 736 sigset_t mask; 737 #endif 738 sigset_t newmask; 739 740 /* VARIABLES PROTECTED BY ops_lock: ops */ 741 742 sigfillset(&newmask); 743 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 744 mutex_lock(&ops_lock); 745 if (ops.cl_call == NULL) { 746 ops.cl_call = clnt_dg_call; 747 ops.cl_abort = clnt_dg_abort; 748 ops.cl_geterr = clnt_dg_geterr; 749 ops.cl_freeres = clnt_dg_freeres; 750 ops.cl_destroy = clnt_dg_destroy; 751 ops.cl_control = clnt_dg_control; 752 } 753 mutex_unlock(&ops_lock); 754 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 755 return (&ops); 756 } 757 758 /* 759 * Make sure that the time is not garbage. -1 value is allowed. 760 */ 761 static bool_t 762 time_not_ok(t) 763 struct timeval *t; 764 { 765 766 _DIAGASSERT(t != NULL); 767 768 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 769 t->tv_usec < -1 || t->tv_usec > 1000000); 770 } 771