1 /* $NetBSD: clnt_dg.c,v 1.13 2003/10/22 15:38:31 drochner 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 1.13 2003/10/22 15:38:31 drochner 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 = mem_alloc(sizeof (*cu) + sendsz + recvsz); 245 if (cu == NULL) 246 goto err1; 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 cl->cl_ops = clnt_dg_ops(); 282 cl->cl_private = (caddr_t)(void *)cu; 283 cl->cl_auth = authnone_create(); 284 cl->cl_tp = NULL; 285 cl->cl_netid = NULL; 286 cu->pfdp.fd = cu->cu_fd; 287 cu->pfdp.events = POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND; 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 caddr_t 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 struct timeval time_waited; 318 bool_t ok; 319 int nrefreshes = 2; /* number of times to refresh cred */ 320 struct timeval timeout; 321 struct timeval retransmit_time; 322 struct timeval startime, curtime; 323 int firsttimeout = 1; 324 #ifdef _REENTRANT 325 sigset_t mask; 326 #endif 327 sigset_t newmask; 328 ssize_t recvlen = 0; 329 330 _DIAGASSERT(cl != NULL); 331 332 cu = (struct cu_data *)cl->cl_private; 333 334 sigfillset(&newmask); 335 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 336 mutex_lock(&clnt_fd_lock); 337 while (dg_fd_locks[cu->cu_fd]) 338 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 339 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 340 mutex_unlock(&clnt_fd_lock); 341 if (cu->cu_total.tv_usec == -1) { 342 timeout = utimeout; /* use supplied timeout */ 343 } else { 344 timeout = cu->cu_total; /* use default timeout */ 345 } 346 347 time_waited.tv_sec = 0; 348 time_waited.tv_usec = 0; 349 retransmit_time = cu->cu_wait; 350 351 call_again: 352 xdrs = &(cu->cu_outxdrs); 353 xdrs->x_op = XDR_ENCODE; 354 XDR_SETPOS(xdrs, cu->cu_xdrpos); 355 /* 356 * the transaction is the first thing in the out buffer 357 */ 358 (*(u_int32_t *)(void *)(cu->cu_outbuf))++; 359 if ((! XDR_PUTINT32(xdrs, (int32_t *)&proc)) || 360 (! AUTH_MARSHALL(cl->cl_auth, xdrs)) || 361 (! (*xargs)(xdrs, argsp))) { 362 release_fd_lock(cu->cu_fd, mask); 363 return (cu->cu_error.re_status = RPC_CANTENCODEARGS); 364 } 365 outlen = (size_t)XDR_GETPOS(xdrs); 366 367 send_again: 368 if (sendto(cu->cu_fd, cu->cu_outbuf, outlen, 0, 369 (struct sockaddr *)(void *)&cu->cu_raddr, (socklen_t)cu->cu_rlen) 370 != outlen) { 371 cu->cu_error.re_errno = errno; 372 release_fd_lock(cu->cu_fd, mask); 373 return (cu->cu_error.re_status = RPC_CANTSEND); 374 } 375 376 /* 377 * Hack to provide rpc-based message passing 378 */ 379 if (timeout.tv_sec == 0 && timeout.tv_usec == 0) { 380 release_fd_lock(cu->cu_fd, mask); 381 return (cu->cu_error.re_status = RPC_TIMEDOUT); 382 } 383 /* 384 * sub-optimal code appears here because we have 385 * some clock time to spare while the packets are in flight. 386 * (We assume that this is actually only executed once.) 387 */ 388 reply_msg.acpted_rply.ar_verf = _null_auth; 389 reply_msg.acpted_rply.ar_results.where = resultsp; 390 reply_msg.acpted_rply.ar_results.proc = xresults; 391 392 393 for (;;) { 394 switch (poll(&cu->pfdp, 1, 395 __rpc_timeval_to_msec(&retransmit_time))) { 396 case 0: 397 time_waited.tv_sec += retransmit_time.tv_sec; 398 time_waited.tv_usec += retransmit_time.tv_usec; 399 while (time_waited.tv_usec >= 1000000) { 400 time_waited.tv_sec++; 401 time_waited.tv_usec -= 1000000; 402 } 403 /* update retransmit_time */ 404 if (retransmit_time.tv_sec < RPC_MAX_BACKOFF) { 405 retransmit_time.tv_usec *= 2; 406 retransmit_time.tv_sec *= 2; 407 while (retransmit_time.tv_usec >= 1000000) { 408 retransmit_time.tv_sec++; 409 retransmit_time.tv_usec -= 1000000; 410 } 411 } 412 413 if ((time_waited.tv_sec < timeout.tv_sec) || 414 ((time_waited.tv_sec == timeout.tv_sec) && 415 (time_waited.tv_usec < timeout.tv_usec))) 416 goto send_again; 417 release_fd_lock(cu->cu_fd, mask); 418 return (cu->cu_error.re_status = RPC_TIMEDOUT); 419 420 case -1: 421 if (errno == EBADF) { 422 cu->cu_error.re_errno = errno; 423 release_fd_lock(cu->cu_fd, mask); 424 return (cu->cu_error.re_status = RPC_CANTRECV); 425 } 426 if (errno != EINTR) { 427 errno = 0; /* reset it */ 428 continue; 429 } 430 /* interrupted by another signal, update time_waited */ 431 if (firsttimeout) { 432 /* 433 * Could have done gettimeofday before clnt_call 434 * but that means 1 more system call per each 435 * clnt_call, so do it after first time out 436 */ 437 if (gettimeofday(&startime, 438 (struct timezone *) NULL) == -1) { 439 errno = 0; 440 continue; 441 } 442 firsttimeout = 0; 443 errno = 0; 444 continue; 445 }; 446 if (gettimeofday(&curtime, 447 (struct timezone *) NULL) == -1) { 448 errno = 0; 449 continue; 450 }; 451 time_waited.tv_sec += curtime.tv_sec - startime.tv_sec; 452 time_waited.tv_usec += curtime.tv_usec - 453 startime.tv_usec; 454 while (time_waited.tv_usec < 0) { 455 time_waited.tv_sec--; 456 time_waited.tv_usec += 1000000; 457 }; 458 while (time_waited.tv_usec >= 1000000) { 459 time_waited.tv_sec++; 460 time_waited.tv_usec -= 1000000; 461 } 462 startime.tv_sec = curtime.tv_sec; 463 startime.tv_usec = curtime.tv_usec; 464 if ((time_waited.tv_sec > timeout.tv_sec) || 465 ((time_waited.tv_sec == timeout.tv_sec) && 466 (time_waited.tv_usec > timeout.tv_usec))) { 467 release_fd_lock(cu->cu_fd, mask); 468 return (cu->cu_error.re_status = RPC_TIMEDOUT); 469 } 470 errno = 0; /* reset it */ 471 continue; 472 }; 473 474 if (cu->pfdp.revents & POLLNVAL || (cu->pfdp.revents == 0)) { 475 cu->cu_error.re_status = RPC_CANTRECV; 476 /* 477 * Note: we're faking errno here because we 478 * previously would have expected poll() to 479 * return -1 with errno EBADF. Poll(BA_OS) 480 * returns 0 and sets the POLLNVAL revents flag 481 * instead. 482 */ 483 cu->cu_error.re_errno = errno = EBADF; 484 release_fd_lock(cu->cu_fd, mask); 485 return (-1); 486 } 487 488 /* We have some data now */ 489 do { 490 if (errno == EINTR) { 491 /* 492 * Must make sure errno was not already 493 * EINTR in case recvfrom() returns -1. 494 */ 495 errno = 0; 496 } 497 recvlen = recvfrom(cu->cu_fd, cu->cu_inbuf, 498 cu->cu_recvsz, 0, NULL, NULL); 499 } while (recvlen < 0 && errno == EINTR); 500 if (recvlen < 0) { 501 if (errno == EWOULDBLOCK) 502 continue; 503 cu->cu_error.re_errno = errno; 504 release_fd_lock(cu->cu_fd, mask); 505 return (cu->cu_error.re_status = RPC_CANTRECV); 506 } 507 if (recvlen < sizeof (u_int32_t)) 508 continue; 509 /* see if reply transaction id matches sent id */ 510 if (*((u_int32_t *)(void *)(cu->cu_inbuf)) != 511 *((u_int32_t *)(void *)(cu->cu_outbuf))) 512 continue; 513 /* we now assume we have the proper reply */ 514 break; 515 } 516 517 /* 518 * now decode and validate the response 519 */ 520 521 xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)recvlen, XDR_DECODE); 522 ok = xdr_replymsg(&reply_xdrs, &reply_msg); 523 /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */ 524 if (ok) { 525 if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) && 526 (reply_msg.acpted_rply.ar_stat == SUCCESS)) 527 cu->cu_error.re_status = RPC_SUCCESS; 528 else 529 _seterr_reply(&reply_msg, &(cu->cu_error)); 530 531 if (cu->cu_error.re_status == RPC_SUCCESS) { 532 if (! AUTH_VALIDATE(cl->cl_auth, 533 &reply_msg.acpted_rply.ar_verf)) { 534 cu->cu_error.re_status = RPC_AUTHERROR; 535 cu->cu_error.re_why = AUTH_INVALIDRESP; 536 } 537 if (reply_msg.acpted_rply.ar_verf.oa_base != NULL) { 538 xdrs->x_op = XDR_FREE; 539 (void) xdr_opaque_auth(xdrs, 540 &(reply_msg.acpted_rply.ar_verf)); 541 } 542 } /* end successful completion */ 543 /* 544 * If unsuccesful AND error is an authentication error 545 * then refresh credentials and try again, else break 546 */ 547 else if (cu->cu_error.re_status == RPC_AUTHERROR) 548 /* maybe our credentials need to be refreshed ... */ 549 if (nrefreshes > 0 && AUTH_REFRESH(cl->cl_auth)) { 550 nrefreshes--; 551 goto call_again; 552 } 553 /* end of unsuccessful completion */ 554 } /* end of valid reply message */ 555 else { 556 cu->cu_error.re_status = RPC_CANTDECODERES; 557 558 } 559 release_fd_lock(cu->cu_fd, mask); 560 return (cu->cu_error.re_status); 561 } 562 563 static void 564 clnt_dg_geterr(cl, errp) 565 CLIENT *cl; 566 struct rpc_err *errp; 567 { 568 struct cu_data *cu; 569 570 _DIAGASSERT(cl != NULL); 571 _DIAGASSERT(errp != NULL); 572 573 cu = (struct cu_data *)cl->cl_private; 574 *errp = cu->cu_error; 575 } 576 577 static bool_t 578 clnt_dg_freeres(cl, xdr_res, res_ptr) 579 CLIENT *cl; 580 xdrproc_t xdr_res; 581 caddr_t res_ptr; 582 { 583 struct cu_data *cu; 584 XDR *xdrs; 585 bool_t dummy; 586 #ifdef _REENTRANT 587 sigset_t mask; 588 #endif 589 sigset_t newmask; 590 591 _DIAGASSERT(cl != NULL); 592 cu = (struct cu_data *)cl->cl_private; 593 xdrs = &(cu->cu_outxdrs); 594 595 sigfillset(&newmask); 596 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 597 mutex_lock(&clnt_fd_lock); 598 while (dg_fd_locks[cu->cu_fd]) 599 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 600 xdrs->x_op = XDR_FREE; 601 dummy = (*xdr_res)(xdrs, res_ptr); 602 mutex_unlock(&clnt_fd_lock); 603 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 604 cond_signal(&dg_cv[cu->cu_fd]); 605 return (dummy); 606 } 607 608 /*ARGSUSED*/ 609 static void 610 clnt_dg_abort(h) 611 CLIENT *h; 612 { 613 } 614 615 static bool_t 616 clnt_dg_control(cl, request, info) 617 CLIENT *cl; 618 u_int request; 619 char *info; 620 { 621 struct cu_data *cu; 622 struct netbuf *addr; 623 #ifdef _REENTRANT 624 sigset_t mask; 625 #endif 626 sigset_t newmask; 627 628 _DIAGASSERT(cl != NULL); 629 /* info is handled below */ 630 631 cu = (struct cu_data *)cl->cl_private; 632 633 sigfillset(&newmask); 634 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 635 mutex_lock(&clnt_fd_lock); 636 while (dg_fd_locks[cu->cu_fd]) 637 cond_wait(&dg_cv[cu->cu_fd], &clnt_fd_lock); 638 dg_fd_locks[cu->cu_fd] = __rpc_lock_value; 639 mutex_unlock(&clnt_fd_lock); 640 switch (request) { 641 case CLSET_FD_CLOSE: 642 cu->cu_closeit = TRUE; 643 release_fd_lock(cu->cu_fd, mask); 644 return (TRUE); 645 case CLSET_FD_NCLOSE: 646 cu->cu_closeit = FALSE; 647 release_fd_lock(cu->cu_fd, mask); 648 return (TRUE); 649 } 650 651 /* for other requests which use info */ 652 if (info == NULL) { 653 release_fd_lock(cu->cu_fd, mask); 654 return (FALSE); 655 } 656 switch (request) { 657 case CLSET_TIMEOUT: 658 if (time_not_ok((struct timeval *)(void *)info)) { 659 release_fd_lock(cu->cu_fd, mask); 660 return (FALSE); 661 } 662 cu->cu_total = *(struct timeval *)(void *)info; 663 break; 664 case CLGET_TIMEOUT: 665 *(struct timeval *)(void *)info = cu->cu_total; 666 break; 667 case CLGET_SERVER_ADDR: /* Give him the fd address */ 668 /* Now obsolete. Only for backward compatibility */ 669 (void) memcpy(info, &cu->cu_raddr, (size_t)cu->cu_rlen); 670 break; 671 case CLSET_RETRY_TIMEOUT: 672 if (time_not_ok((struct timeval *)(void *)info)) { 673 release_fd_lock(cu->cu_fd, mask); 674 return (FALSE); 675 } 676 cu->cu_wait = *(struct timeval *)(void *)info; 677 break; 678 case CLGET_RETRY_TIMEOUT: 679 *(struct timeval *)(void *)info = cu->cu_wait; 680 break; 681 case CLGET_FD: 682 *(int *)(void *)info = cu->cu_fd; 683 break; 684 case CLGET_SVC_ADDR: 685 addr = (struct netbuf *)(void *)info; 686 addr->buf = &cu->cu_raddr; 687 addr->len = cu->cu_rlen; 688 addr->maxlen = sizeof cu->cu_raddr; 689 break; 690 case CLSET_SVC_ADDR: /* set to new address */ 691 addr = (struct netbuf *)(void *)info; 692 if (addr->len < sizeof cu->cu_raddr) { 693 release_fd_lock(cu->cu_fd, mask); 694 return (FALSE); 695 } 696 (void) memcpy(&cu->cu_raddr, addr->buf, addr->len); 697 cu->cu_rlen = addr->len; 698 break; 699 case CLGET_XID: 700 /* 701 * use the knowledge that xid is the 702 * first element in the call structure *. 703 * This will get the xid of the PREVIOUS call 704 */ 705 *(u_int32_t *)(void *)info = 706 ntohl(*(u_int32_t *)(void *)cu->cu_outbuf); 707 break; 708 709 case CLSET_XID: 710 /* This will set the xid of the NEXT call */ 711 *(u_int32_t *)(void *)cu->cu_outbuf = 712 htonl(*(u_int32_t *)(void *)info - 1); 713 /* decrement by 1 as clnt_dg_call() increments once */ 714 break; 715 716 case CLGET_VERS: 717 /* 718 * This RELIES on the information that, in the call body, 719 * the version number field is the fifth field from the 720 * begining of the RPC header. MUST be changed if the 721 * call_struct is changed 722 */ 723 *(u_int32_t *)(void *)info = 724 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 725 4 * BYTES_PER_XDR_UNIT)); 726 break; 727 728 case CLSET_VERS: 729 *(u_int32_t *)(void *)(cu->cu_outbuf + 4 * BYTES_PER_XDR_UNIT) 730 = htonl(*(u_int32_t *)(void *)info); 731 break; 732 733 case CLGET_PROG: 734 /* 735 * This RELIES on the information that, in the call body, 736 * the program number field is the fourth field from the 737 * begining of the RPC header. MUST be changed if the 738 * call_struct is changed 739 */ 740 *(u_int32_t *)(void *)info = 741 ntohl(*(u_int32_t *)(void *)(cu->cu_outbuf + 742 3 * BYTES_PER_XDR_UNIT)); 743 break; 744 745 case CLSET_PROG: 746 *(u_int32_t *)(void *)(cu->cu_outbuf + 3 * BYTES_PER_XDR_UNIT) 747 = htonl(*(u_int32_t *)(void *)info); 748 break; 749 750 default: 751 release_fd_lock(cu->cu_fd, mask); 752 return (FALSE); 753 } 754 release_fd_lock(cu->cu_fd, mask); 755 return (TRUE); 756 } 757 758 static void 759 clnt_dg_destroy(cl) 760 CLIENT *cl; 761 { 762 struct cu_data *cu; 763 int cu_fd; 764 #ifdef _REENTRANT 765 sigset_t mask; 766 #endif 767 sigset_t newmask; 768 769 _DIAGASSERT(cl != NULL); 770 771 cu = (struct cu_data *)cl->cl_private; 772 cu_fd = cu->cu_fd; 773 774 sigfillset(&newmask); 775 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 776 mutex_lock(&clnt_fd_lock); 777 while (dg_fd_locks[cu_fd]) 778 cond_wait(&dg_cv[cu_fd], &clnt_fd_lock); 779 if (cu->cu_closeit) 780 (void) close(cu_fd); 781 XDR_DESTROY(&(cu->cu_outxdrs)); 782 mem_free(cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz)); 783 if (cl->cl_netid && cl->cl_netid[0]) 784 mem_free(cl->cl_netid, strlen(cl->cl_netid) +1); 785 if (cl->cl_tp && cl->cl_tp[0]) 786 mem_free(cl->cl_tp, strlen(cl->cl_tp) +1); 787 mem_free(cl, sizeof (CLIENT)); 788 mutex_unlock(&clnt_fd_lock); 789 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 790 cond_signal(&dg_cv[cu_fd]); 791 } 792 793 static struct clnt_ops * 794 clnt_dg_ops() 795 { 796 static struct clnt_ops ops; 797 #ifdef _REENTRANT 798 extern mutex_t ops_lock; 799 sigset_t mask; 800 #endif 801 sigset_t newmask; 802 803 /* VARIABLES PROTECTED BY ops_lock: ops */ 804 805 sigfillset(&newmask); 806 thr_sigsetmask(SIG_SETMASK, &newmask, &mask); 807 mutex_lock(&ops_lock); 808 if (ops.cl_call == NULL) { 809 ops.cl_call = clnt_dg_call; 810 ops.cl_abort = clnt_dg_abort; 811 ops.cl_geterr = clnt_dg_geterr; 812 ops.cl_freeres = clnt_dg_freeres; 813 ops.cl_destroy = clnt_dg_destroy; 814 ops.cl_control = clnt_dg_control; 815 } 816 mutex_unlock(&ops_lock); 817 thr_sigsetmask(SIG_SETMASK, &mask, NULL); 818 return (&ops); 819 } 820 821 /* 822 * Make sure that the time is not garbage. -1 value is allowed. 823 */ 824 static bool_t 825 time_not_ok(t) 826 struct timeval *t; 827 { 828 829 _DIAGASSERT(t != NULL); 830 831 return (t->tv_sec < -1 || t->tv_sec > 100000000 || 832 t->tv_usec < -1 || t->tv_usec > 1000000); 833 } 834 835 836 /* 837 * Convert from timevals (used by select) to milliseconds (used by poll). 838 */ 839 static int 840 __rpc_timeval_to_msec(t) 841 struct timeval *t; 842 { 843 int t1, tmp; 844 845 _DIAGASSERT(t != NULL); 846 847 /* 848 * We're really returning t->tv_sec * 1000 + (t->tv_usec / 1000) 849 * but try to do so efficiently. Note: 1000 = 1024 - 16 - 8. 850 */ 851 tmp = (int)t->tv_sec << 3; 852 t1 = -tmp; 853 t1 += t1 << 1; 854 t1 += tmp << 7; 855 if (t->tv_usec) 856 t1 += (int)(t->tv_usec / 1000); 857 858 return (t1); 859 } 860