clnt_dg.c revision 1.15
1 /* $NetBSD: clnt_dg.c,v 1.15 2005/06/09 22:13:17 yamt 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 1.15 2005/06/09 22:13:17 yamt 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, caddr_t, 77 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 static int __rpc_timeval_to_msec __P((struct timeval *)); 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. Therfore, 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 activte 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 #ifdef _REENTRANT 103 extern int __isthreaded; 104 #define __rpc_lock_value __isthreaded; 105 extern mutex_t clnt_fd_lock; 106 static cond_t *dg_cv; 107 #define release_fd_lock(fd, mask) { \ 108 mutex_lock(&clnt_fd_lock); \ 109 dg_fd_locks[fd] = 0; \ 110 mutex_unlock(&clnt_fd_lock); \ 111 thr_sigsetmask(SIG_SETMASK, &(mask), (sigset_t *) NULL); \ 112 cond_signal(&dg_cv[fd]); \ 113 } 114 #else 115 #define release_fd_lock(fd,mask) 116 #define __rpc_lock_value 0 117 #endif 118 119 static const char mem_err_clnt_dg[] = "clnt_dg_create: out of memory"; 120 121 /* VARIABLES PROTECTED BY clnt_fd_lock: dg_fd_locks, dg_cv */ 122 123 /* 124 * Private data kept per client handle 125 */ 126 struct cu_data { 127 int cu_fd; /* connections fd */ 128 bool_t cu_closeit; /* opened by library */ 129 struct sockaddr_storage cu_raddr; /* remote address */ 130 int cu_rlen; 131 struct timeval cu_wait; /* retransmit interval */ 132 struct timeval cu_total; /* total time for the call */ 133 struct rpc_err cu_error; 134 XDR cu_outxdrs; 135 u_int cu_xdrpos; 136 u_int cu_sendsz; /* send size */ 137 char *cu_outbuf; 138 u_int cu_recvsz; /* recv size */ 139 struct pollfd pfdp; 140 char cu_inbuf[1]; 141 }; 142 143 /* 144 * Connection less client creation returns with client handle parameters. 145 * Default options are set, which the user can change using clnt_control(). 146 * fd should be open and bound. 147 * NB: The rpch->cl_auth is initialized to null authentication. 148 * Caller may wish to set this something more useful. 149 * 150 * sendsz and recvsz are the maximum allowable packet sizes that can be 151 * sent and received. Normally they are the same, but they can be 152 * changed to improve the program efficiency and buffer allocation. 153 * If they are 0, use the transport default. 154 * 155 * If svcaddr is NULL, returns NULL. 156 */ 157 CLIENT * 158 clnt_dg_create(fd, svcaddr, program, version, sendsz, recvsz) 159 int fd; /* open file descriptor */ 160 const struct netbuf *svcaddr; /* servers address */ 161 rpcprog_t program; /* program number */ 162 rpcvers_t version; /* version number */ 163 u_int sendsz; /* buffer recv size */ 164 u_int recvsz; /* buffer send size */ 165 { 166 CLIENT *cl = NULL; /* client handle */ 167 struct cu_data *cu = NULL; /* private data */ 168 struct rpc_msg call_msg; 169 #ifdef _REENTRANT 170 sigset_t mask; 171 #endif 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 #ifdef _REENTRANT 181 size_t cv_allocsz; 182 #endif 183 size_t fd_allocsz; 184 int dtbsize = __rpc_dtbsize(); 185 186 fd_allocsz = dtbsize * sizeof (int); 187 dg_fd_locks = (int *) mem_alloc(fd_allocsz); 188 if (dg_fd_locks == (int *) NULL) { 189 mutex_unlock(&clnt_fd_lock); 190 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 191 goto err1; 192 } else 193 memset(dg_fd_locks, '\0', fd_allocsz); 194 195 #ifdef _REENTRANT 196 cv_allocsz = dtbsize * sizeof (cond_t); 197 dg_cv = (cond_t *) mem_alloc(cv_allocsz); 198 if (dg_cv == (cond_t *) NULL) { 199 mem_free(dg_fd_locks, fd_allocsz); 200 dg_fd_locks = (int *) NULL; 201 mutex_unlock(&clnt_fd_lock); 202 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 203 goto err1; 204 } else { 205 int i; 206 207 for (i = 0; i < dtbsize; i++) 208 cond_init(&dg_cv[i], 0, (void *) 0); 209 } 210 #endif 211 } 212 213 mutex_unlock(&clnt_fd_lock); 214 thr_sigsetmask(SIG_SETMASK, &(mask), NULL); 215 216 if (svcaddr == NULL) { 217 rpc_createerr.cf_stat = RPC_UNKNOWNADDR; 218 return (NULL); 219 } 220 221 if (!__rpc_fd2sockinfo(fd, &si)) { 222 rpc_createerr.cf_stat = RPC_TLIERROR; 223 rpc_createerr.cf_error.re_errno = 0; 224 return (NULL); 225 } 226 /* 227 * Find the receive and the send size 228 */ 229 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsz); 230 recvsz = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsz); 231 if ((sendsz == 0) || (recvsz == 0)) { 232 rpc_createerr.cf_stat = RPC_TLIERROR; /* XXX */ 233 rpc_createerr.cf_error.re_errno = 0; 234 return (NULL); 235 } 236 237 if ((cl = mem_alloc(sizeof (CLIENT))) == NULL) 238 goto err1; 239 /* 240 * Should be multiple of 4 for XDR. 241 */ 242 sendsz = ((sendsz + 3) / 4) * 4; 243 recvsz = ((recvsz + 3) / 4) * 4; 244 cu = malloc(sizeof (*cu) + sendsz + recvsz); 245 if (cu == NULL) 246 goto err1; 247 memset(cu, 0, sizeof(*cu)); 248 (void) memcpy(&cu->cu_raddr, svcaddr->buf, (size_t)svcaddr->len); 249 cu->cu_rlen = svcaddr->len; 250 cu->cu_outbuf = &cu->cu_inbuf[recvsz]; 251 /* Other values can also be set through clnt_control() */ 252 cu->cu_wait.tv_sec = 15; /* heuristically chosen */ 253 cu->cu_wait.tv_usec = 0; 254 cu->cu_total.tv_sec = -1; 255 cu->cu_total.tv_usec = -1; 256 cu->cu_sendsz = sendsz; 257 cu->cu_recvsz = recvsz; 258 call_msg.rm_xid = __RPC_GETXID(); 259 call_msg.rm_call.cb_prog = program; 260 call_msg.rm_call.cb_vers = version; 261 xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf, sendsz, 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)); 268 269 /* XXX fvdl - do we still want this? */ 270 #if 0 271 (void)bindresvport_sa(fd, (struct sockaddr *)svcaddr->buf); 272 #endif 273 ioctl(fd, FIONBIO, (char *)(void *)&one); 274 275 /* 276 * By default, closeit is always FALSE. It is users responsibility 277 * to do a close on it, else the user may use clnt_control 278 * to let clnt_destroy do it for him/her. 279 */ 280 cu->cu_closeit = FALSE; 281 cu->cu_fd = fd; 282 cl->cl_ops = clnt_dg_ops(); 283 cl->cl_private = (caddr_t)(void *)cu; 284 cl->cl_auth = authnone_create(); 285 cl->cl_tp = NULL; 286 cl->cl_netid = NULL; 287 cu->pfdp.fd = cu->cu_fd; 288 cu->pfdp.events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND; 289 return (cl); 290 err1: 291 warnx(mem_err_clnt_dg); 292 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 293 rpc_createerr.cf_error.re_errno = errno; 294 err2: 295 if (cl) { 296 mem_free(cl, sizeof (CLIENT)); 297 if (cu) 298 mem_free(cu, sizeof (*cu) + sendsz + recvsz); 299 } 300 return (NULL); 301 } 302 303 static enum clnt_stat 304 clnt_dg_call(cl, proc, xargs, argsp, xresults, resultsp, utimeout) 305 CLIENT *cl; /* client handle */ 306 rpcproc_t proc; /* procedure number */ 307 xdrproc_t xargs; /* xdr routine for args */ 308 caddr_t argsp; /* pointer to args */ 309 xdrproc_t xresults; /* xdr routine for results */ 310 caddr_t resultsp; /* pointer to results */ 311 struct timeval utimeout; /* seconds to wait before giving up */ 312 { 313 struct cu_data *cu; 314 XDR *xdrs; 315 size_t outlen; 316 struct rpc_msg reply_msg; 317 XDR reply_xdrs; 318 struct timeval time_waited; 319 bool_t ok; 320 int nrefreshes = 2; /* number of times to refresh cred */ 321 struct timeval timeout; 322 struct timeval retransmit_time; 323 struct timeval startime, curtime; 324 int firsttimeout = 1; 325 #ifdef _REENTRANT 326 sigset_t mask; 327 #endif 328 sigset_t newmask; 329 ssize_t recvlen = 0; 330 331 _DIAGASSERT(cl != NULL); 332 333 cu = (struct cu_data *)cl->cl_private; 334 335 sigfillset(&newmask); 336 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 337 mutex_lock(&clnt_fd_lock); 338 while (dg_fd_locks[cu->cu_fd]) 339 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 340 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 341 mutex_unlock(&clnt_fd_lock); 342 if (cu->cu_total.tv_usec == -1) { 343 timeout = utimeout; /* use supplied timeout */ 344 } else { 345 timeout = cu->cu_total; /* use default timeout */ 346 } 347 348 time_waited.tv_sec = 0; 349 time_waited.tv_usec = 0; 350 retransmit_time = cu->cu_wait; 351 352 call_again: 353 xdrs = &(cu->cu_outxdrs); 354 xdrs->x_op = XDR_ENCODE; 355 XDR_SETPOS(xdrs, cu->cu_xdrpos); 356 /* 357 * the transaction is the first thing in the out buffer 358 */ 359 (*(u_int32_t *)(void *)(cu->cu_outbuf))++; 360 if ((! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 361 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 362 (! (*xargs)(xdrs, argsp))) { 363 release_fd_lock(cu->cu_fd, mask); 364 return (cu->cu_error.re_status = RPC_CANTENCODEARGS); 365 } 366 outlen = (size_t)XDR_GETPOS(xdrs); 367 368 send_again: 369 if (sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, 370 (struct sockaddr *)(void *)&cu->cu_raddr, (socklen_t)cu->cu_rlen) 371 != outlen) { 372 cu->cu_error.re_errno = errno; 373 release_fd_lock(cu->cu_fd, mask); 374 return (cu->cu_error.re_status = RPC_CANTSEND); 375 } 376 377 /* 378 * Hack to provide rpc-based message passing 379 */ 380 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 381 release_fd_lock(cu->cu_fd, mask); 382 return (cu->cu_error.re_status = RPC_TIMEDOUT); 383 } 384 /* 385 * sub-optimal code appears here because we have 386 * some clock time to spare while the packets are in flight. 387 * (We assume that this is actually only executed once.) 388 */ 389 reply_msg.acpted_rply.ar_verf = _null_auth; 390 reply_msg.acpted_rply.ar_results.where = resultsp; 391 reply_msg.acpted_rply.ar_results.proc = xresults; 392 393 394 for (;;) { 395 switch (poll(&cu->pfdp, 1, 396 __rpc_timeval_to_msec(&retransmit_time))) { 397 case 0: 398 time_waited.tv_sec += retransmit_time.tv_sec; 399 time_waited.tv_usec += retransmit_time.tv_usec; 400 while (time_waited.tv_usec >= 1000000) { 401 time_waited.tv_sec++; 402 time_waited.tv_usec -= 1000000; 403 } 404 /* update retransmit_time */ 405 if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) { 406 retransmit_time.tv_usec *= 2; 407 retransmit_time.tv_sec *= 2; 408 while (retransmit_time.tv_usec >= 1000000) { 409 retransmit_time.tv_sec++; 410 retransmit_time.tv_usec -= 1000000; 411 } 412 } 413 414 if ((time_waited.tv_sec < timeout.tv_sec) || 415 ((time_waited.tv_sec == timeout.tv_sec) && 416 (time_waited.tv_usec < timeout.tv_usec))) 417 goto send_again; 418 release_fd_lock(cu->cu_fd, mask); 419 return (cu->cu_error.re_status = RPC_TIMEDOUT); 420 421 case -1: 422 if (errno == EBADF) { 423 cu->cu_error.re_errno = errno; 424 release_fd_lock(cu->cu_fd, mask); 425 return (cu->cu_error.re_status = RPC_CANTRECV); 426 } 427 if (errno != EINTR) { 428 errno = 0; /* reset it */ 429 continue; 430 } 431 /* interrupted by another signal, update time_waited */ 432 if (firsttimeout) { 433 /* 434 * Could have done gettimeofday before clnt_call 435 * but that means 1 more system call per each 436 * clnt_call, so do it after first time out 437 */ 438 if (gettimeofday(&startime, 439 (struct timezone *) NULL) == -1) { 440 errno = 0; 441 continue; 442 } 443 firsttimeout = 0; 444 errno = 0; 445 continue; 446 }; 447 if (gettimeofday(&curtime, 448 (struct timezone *) NULL) == -1) { 449 errno = 0; 450 continue; 451 }; 452 time_waited.tv_sec += curtime.tv_sec - startime.tv_sec; 453 time_waited.tv_usec += curtime.tv_usec - 454 startime.tv_usec; 455 while (time_waited.tv_usec < 0) { 456 time_waited.tv_sec--; 457 time_waited.tv_usec += 1000000; 458 }; 459 while (time_waited.tv_usec >= 1000000) { 460 time_waited.tv_sec++; 461 time_waited.tv_usec -= 1000000; 462 } 463 startime.tv_sec = curtime.tv_sec; 464 startime.tv_usec = curtime.tv_usec; 465 if ((time_waited.tv_sec > timeout.tv_sec) || 466 ((time_waited.tv_sec == timeout.tv_sec) && 467 (time_waited.tv_usec > timeout.tv_usec))) { 468 release_fd_lock(cu->cu_fd, mask); 469 return (cu->cu_error.re_status = RPC_TIMEDOUT); 470 } 471 errno = 0; /* reset it */ 472 continue; 473 }; 474 475 if (cu->pfdp.revents & POLLNVAL || (cu->pfdp.revents == 0)) { 476 cu->cu_error.re_status = RPC_CANTRECV; 477 /* 478 * Note: we're faking errno here because we 479 * previously would have expected poll() to 480 * return -1 with errno EBADF. Poll(BA_OS) 481 * returns 0 and sets the POLLNVAL revents flag 482 * instead. 483 */ 484 cu->cu_error.re_errno = errno = EBADF; 485 release_fd_lock(cu->cu_fd, mask); 486 return (-1); 487 } 488 489 /* We have some data now */ 490 do { 491 if (errno == EINTR) { 492 /* 493 * Must make sure errno was not already 494 * EINTR in case recvfrom() returns -1. 495 */ 496 errno = 0; 497 } 498 recvlen = recvfrom(cu->cu_fd, cu->cu_inbuf, 499 (socklen_t)cu->cu_recvsz, 0, NULL, NULL); 500 } while (recvlen < 0 && errno == EINTR); 501 if (recvlen < 0) { 502 if (errno == EWOULDBLOCK) 503 continue; 504 cu->cu_error.re_errno = errno; 505 release_fd_lock(cu->cu_fd, mask); 506 return (cu->cu_error.re_status = RPC_CANTRECV); 507 } 508 if (recvlen < sizeof (u_int32_t)) 509 continue; 510 /* see if reply transaction id matches sent id */ 511 if (*((u_int32_t *)(void *)(cu->cu_inbuf)) != 512 *((u_int32_t *)(void *)(cu->cu_outbuf))) 513 continue; 514 /* we now assume we have the proper reply */ 515 break; 516 } 517 518 /* 519 * now decode and validate the response 520 */ 521 522 xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); 523 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 524 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 525 if (ok) { 526 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 527 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 528 cu->cu_error.re_status = RPC_SUCCESS; 529 else 530 _seterr_reply(&reply_msg, &(cu->cu_error)); 531 532 if (cu->cu_error.re_status == RPC_SUCCESS) { 533 if (! AUTH_VALIDATE(cl->cl_auth, 534 &reply_msg.acpted_rply.ar_verf)) { 535 cu->cu_error.re_status = RPC_AUTHERROR; 536 cu->cu_error.re_why = AUTH_INVALIDRESP; 537 } 538 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 539 xdrs->x_op = XDR_FREE; 540 (void) xdr_opaque_auth(xdrs, 541 &(reply_msg.acpted_rply.ar_verf)); 542 } 543 } /* end successful completion */ 544 /* 545 * If unsuccesful AND error is an authentication error 546 * then refresh credentials and try again, else break 547 */ 548 else if (cu->cu_error.re_status == RPC_AUTHERROR) 549 /* maybe our credentials need to be refreshed ... */ 550 if (nrefreshes > 0 && AUTH_REFRESH(cl->cl_auth)) { 551 nrefreshes--; 552 goto call_again; 553 } 554 /* end of unsuccessful completion */ 555 } /* end of valid reply message */ 556 else { 557 cu->cu_error.re_status = RPC_CANTDECODERES; 558 559 } 560 release_fd_lock(cu->cu_fd, mask); 561 return (cu->cu_error.re_status); 562 } 563 564 static void 565 clnt_dg_geterr(cl, errp) 566 CLIENT *cl; 567 struct rpc_err *errp; 568 { 569 struct cu_data *cu; 570 571 _DIAGASSERT(cl != NULL); 572 _DIAGASSERT(errp != NULL); 573 574 cu = (struct cu_data *)cl->cl_private; 575 *errp = cu->cu_error; 576 } 577 578 static bool_t 579 clnt_dg_freeres(cl, xdr_res, res_ptr) 580 CLIENT *cl; 581 xdrproc_t xdr_res; 582 caddr_t res_ptr; 583 { 584 struct cu_data *cu; 585 XDR *xdrs; 586 bool_t dummy; 587 #ifdef _REENTRANT 588 sigset_t mask; 589 #endif 590 sigset_t newmask; 591 592 _DIAGASSERT(cl != NULL); 593 cu = (struct cu_data *)cl->cl_private; 594 xdrs = &(cu->cu_outxdrs); 595 596 sigfillset(&newmask); 597 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 598 mutex_lock(&clnt_fd_lock); 599 while (dg_fd_locks[cu->cu_fd]) 600 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 601 xdrs->x_op = XDR_FREE; 602 dummy = (*xdr_res)(xdrs, res_ptr); 603 mutex_unlock(&clnt_fd_lock); 604 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 605 cond_signal(&dg_cv[cu->cu_fd]); 606 return (dummy); 607 } 608 609 /*ARGSUSED*/ 610 static void 611 clnt_dg_abort(h) 612 CLIENT *h; 613 { 614 } 615 616 static bool_t 617 clnt_dg_control(cl, request, info) 618 CLIENT *cl; 619 u_int request; 620 char *info; 621 { 622 struct cu_data *cu; 623 struct netbuf *addr; 624 #ifdef _REENTRANT 625 sigset_t mask; 626 #endif 627 sigset_t newmask; 628 629 _DIAGASSERT(cl != NULL); 630 /* info is handled below */ 631 632 cu = (struct cu_data *)cl->cl_private; 633 634 sigfillset(&newmask); 635 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 636 mutex_lock(&clnt_fd_lock); 637 while (dg_fd_locks[cu->cu_fd]) 638 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 639 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 640 mutex_unlock(&clnt_fd_lock); 641 switch (request) { 642 case CLSET_FD_CLOSE: 643 cu->cu_closeit = TRUE; 644 release_fd_lock(cu->cu_fd, mask); 645 return (TRUE); 646 case CLSET_FD_NCLOSE: 647 cu->cu_closeit = FALSE; 648 release_fd_lock(cu->cu_fd, mask); 649 return (TRUE); 650 } 651 652 /* for other requests which use info */ 653 if (info == NULL) { 654 release_fd_lock(cu->cu_fd, mask); 655 return (FALSE); 656 } 657 switch (request) { 658 case CLSET_TIMEOUT: 659 if (time_not_ok((struct timeval *)(void *)info)) { 660 release_fd_lock(cu->cu_fd, mask); 661 return (FALSE); 662 } 663 cu->cu_total = *(struct timeval *)(void *)info; 664 break; 665 case CLGET_TIMEOUT: 666 *(struct timeval *)(void *)info = cu->cu_total; 667 break; 668 case CLGET_SERVER_ADDR: /* Give him the fd address */ 669 /* Now obsolete. Only for backward compatibility */ 670 (void) memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); 671 break; 672 case CLSET_RETRY_TIMEOUT: 673 if (time_not_ok((struct timeval *)(void *)info)) { 674 release_fd_lock(cu->cu_fd, mask); 675 return (FALSE); 676 } 677 cu->cu_wait = *(struct timeval *)(void *)info; 678 break; 679 case CLGET_RETRY_TIMEOUT: 680 *(struct timeval *)(void *)info = cu->cu_wait; 681 break; 682 case CLGET_FD: 683 *(int *)(void *)info = cu->cu_fd; 684 break; 685 case CLGET_SVC_ADDR: 686 addr = (struct netbuf *)(void *)info; 687 addr->buf = &cu->cu_raddr; 688 addr->len = cu->cu_rlen; 689 addr->maxlen = sizeof cu->cu_raddr; 690 break; 691 case CLSET_SVC_ADDR: /* set to new address */ 692 addr = (struct netbuf *)(void *)info; 693 if (addr->len < sizeof cu->cu_raddr) { 694 release_fd_lock(cu->cu_fd, mask); 695 return (FALSE); 696 } 697 (void) memcpy(&cu->cu_raddr, addr->buf, (size_t)addr->len); 698 cu->cu_rlen = addr->len; 699 break; 700 case CLGET_XID: 701 /* 702 * use the knowledge that xid is the 703 * first element in the call structure *. 704 * This will get the xid of the PREVIOUS call 705 */ 706 *(u_int32_t *)(void *)info = 707 ntohl(*(u_int32_t *)(void *)cu->cu_outbuf); 708 break; 709 710 case CLSET_XID: 711 /* This will set the xid of the NEXT call */ 712 *(u_int32_t *)(void *)cu->cu_outbuf = 713 htonl(*(u_int32_t *)(void *)info - 1); 714 /* decrement by 1 as clnt_dg_call() increments once */ 715 break; 716 717 case CLGET_VERS: 718 /* 719 * This RELIES on the information that, in the call body, 720 * the version number field is the fifth field from the 721 * begining of the RPC header. MUST be changed if the 722 * call_struct is changed 723 */ 724 *(u_int32_t *)(void *)info = 725 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 726 4 * BYTES_PER_XDR_UNIT)); 727 break; 728 729 case CLSET_VERS: 730 *(u_int32_t *)(void *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT) 731 = htonl(*(u_int32_t *)(void *)info); 732 break; 733 734 case CLGET_PROG: 735 /* 736 * This RELIES on the information that, in the call body, 737 * the program number field is the fourth field from the 738 * begining of the RPC header. MUST be changed if the 739 * call_struct is changed 740 */ 741 *(u_int32_t *)(void *)info = 742 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 743 3 * BYTES_PER_XDR_UNIT)); 744 break; 745 746 case CLSET_PROG: 747 *(u_int32_t *)(void *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) 748 = htonl(*(u_int32_t *)(void *)info); 749 break; 750 751 default: 752 release_fd_lock(cu->cu_fd, mask); 753 return (FALSE); 754 } 755 release_fd_lock(cu->cu_fd, mask); 756 return (TRUE); 757 } 758 759 static void 760 clnt_dg_destroy(cl) 761 CLIENT *cl; 762 { 763 struct cu_data *cu; 764 int cu_fd; 765 #ifdef _REENTRANT 766 sigset_t mask; 767 #endif 768 sigset_t newmask; 769 770 _DIAGASSERT(cl != NULL); 771 772 cu = (struct cu_data *)cl->cl_private; 773 cu_fd = cu->cu_fd; 774 775 sigfillset(&newmask); 776 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 777 mutex_lock(&clnt_fd_lock); 778 while (dg_fd_locks[cu_fd]) 779 cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); 780 if (cu->cu_closeit) 781 (void) close(cu_fd); 782 XDR_DESTROY(&(cu->cu_outxdrs)); 783 mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 784 if (cl->cl_netid && cl->cl_netid[0]) 785 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 786 if (cl->cl_tp && cl->cl_tp[0]) 787 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 788 mem_free(cl, sizeof (CLIENT)); 789 mutex_unlock(&clnt_fd_lock); 790 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 791 cond_signal(&dg_cv[cu_fd]); 792 } 793 794 static struct clnt_ops * 795 clnt_dg_ops() 796 { 797 static struct clnt_ops ops; 798 #ifdef _REENTRANT 799 extern mutex_t ops_lock; 800 sigset_t mask; 801 #endif 802 sigset_t newmask; 803 804 /* VARIABLES PROTECTED BY ops_lock: ops */ 805 806 sigfillset(&newmask); 807 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 808 mutex_lock(&ops_lock); 809 if (ops.cl_call == NULL) { 810 ops.cl_call = clnt_dg_call; 811 ops.cl_abort = clnt_dg_abort; 812 ops.cl_geterr = clnt_dg_geterr; 813 ops.cl_freeres = clnt_dg_freeres; 814 ops.cl_destroy = clnt_dg_destroy; 815 ops.cl_control = clnt_dg_control; 816 } 817 mutex_unlock(&ops_lock); 818 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 819 return (&ops); 820 } 821 822 /* 823 * Make sure that the time is not garbage. -1 value is allowed. 824 */ 825 static bool_t 826 time_not_ok(t) 827 struct timeval *t; 828 { 829 830 _DIAGASSERT(t != NULL); 831 832 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 833 t->tv_usec < -1 || t->tv_usec > 1000000); 834 } 835 836 837 /* 838 * Convert from timevals (used by select) to milliseconds (used by poll). 839 */ 840 static int 841 __rpc_timeval_to_msec(t) 842 struct timeval *t; 843 { 844 int t1, tmp; 845 846 _DIAGASSERT(t != NULL); 847 848 /* 849 * We're really returning t->tv_sec * 1000 + (t->tv_usec / 1000) 850 * but try to do so efficiently. Note: 1000 = 1024 - 16 - 8. 851 */ 852 tmp = (int)t->tv_sec << 3; 853 t1 = -tmp; 854 t1 += t1 << 1; 855 t1 += tmp << 7; 856 if (t->tv_usec) 857 t1 += (int)(t->tv_usec / 1000); 858 859 return (t1); 860 } 861
Indexes created Tue Sep 30 17:09:57 GMT 2025